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Diffstat (limited to 'frozen_deps/Crypto')
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diff --git a/frozen_deps/Crypto/Cipher/AES.py b/frozen_deps/Crypto/Cipher/AES.py new file mode 100644 index 0000000..14f68d8 --- /dev/null +++ b/frozen_deps/Crypto/Cipher/AES.py @@ -0,0 +1,115 @@ +# -*- coding: utf-8 -*- +# +# Cipher/AES.py : AES +# +# =================================================================== +# The contents of this file are dedicated to the public domain. To +# the extent that dedication to the public domain is not available, +# everyone is granted a worldwide, perpetual, royalty-free, +# non-exclusive license to exercise all rights associated with the +# contents of this file for any purpose whatsoever. +# No rights are reserved. +# +# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, +# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND +# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS +# BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN +# ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN +# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +# SOFTWARE. +# =================================================================== +"""AES symmetric cipher + +AES `(Advanced Encryption Standard)`__ is a symmetric block cipher standardized +by NIST_ . It has a fixed data block size of 16 bytes. +Its keys can be 128, 192, or 256 bits long. + +AES is very fast and secure, and it is the de facto standard for symmetric +encryption. + +As an example, encryption can be done as follows: + + >>> from Crypto.Cipher import AES + >>> from Crypto import Random + >>> + >>> key = b'Sixteen byte key' + >>> iv = Random.new().read(AES.block_size) + >>> cipher = AES.new(key, AES.MODE_CFB, iv) + >>> msg = iv + cipher.encrypt(b'Attack at dawn') + +.. __: http://en.wikipedia.org/wiki/Advanced_Encryption_Standard +.. _NIST: http://csrc.nist.gov/publications/fips/fips197/fips-197.pdf + +:undocumented: __revision__, __package__ +""" + +__revision__ = "$Id$" + +from Crypto.Cipher import blockalgo +from Crypto.Cipher import _AES + +class AESCipher (blockalgo.BlockAlgo): + """AES cipher object""" + + def __init__(self, key, *args, **kwargs): + """Initialize an AES cipher object + + See also `new()` at the module level.""" + blockalgo.BlockAlgo.__init__(self, _AES, key, *args, **kwargs) + +def new(key, *args, **kwargs): + """Create a new AES cipher + + :Parameters: + key : byte string + The secret key to use in the symmetric cipher. + It must be 16 (*AES-128*), 24 (*AES-192*), or 32 (*AES-256*) bytes long. + :Keywords: + mode : a *MODE_** constant + The chaining mode to use for encryption or decryption. + Default is `MODE_ECB`. + IV : byte string + The initialization vector to use for encryption or decryption. + + It is ignored for `MODE_ECB` and `MODE_CTR`. + + For `MODE_OPENPGP`, IV must be `block_size` bytes long for encryption + and `block_size` +2 bytes for decryption (in the latter case, it is + actually the *encrypted* IV which was prefixed to the ciphertext). + It is mandatory. + + For all other modes, it must be `block_size` bytes longs. It is optional and + when not present it will be given a default value of all zeroes. + counter : callable + (*Only* `MODE_CTR`). A stateful function that returns the next + *counter block*, which is a byte string of `block_size` bytes. + For better performance, use `Crypto.Util.Counter`. + segment_size : integer + (*Only* `MODE_CFB`).The number of bits the plaintext and ciphertext + are segmented in. + It must be a multiple of 8. If 0 or not specified, it will be assumed to be 8. + + :Return: an `AESCipher` object + """ + return AESCipher(key, *args, **kwargs) + +#: Electronic Code Book (ECB). See `blockalgo.MODE_ECB`. +MODE_ECB = 1 +#: Cipher-Block Chaining (CBC). See `blockalgo.MODE_CBC`. +MODE_CBC = 2 +#: Cipher FeedBack (CFB). See `blockalgo.MODE_CFB`. +MODE_CFB = 3 +#: This mode should not be used. +MODE_PGP = 4 +#: Output FeedBack (OFB). See `blockalgo.MODE_OFB`. +MODE_OFB = 5 +#: CounTer Mode (CTR). See `blockalgo.MODE_CTR`. +MODE_CTR = 6 +#: OpenPGP Mode. See `blockalgo.MODE_OPENPGP`. +MODE_OPENPGP = 7 +#: Size of a data block (in bytes) +block_size = 16 +#: Size of a key (in bytes) +key_size = ( 16, 24, 32 ) + diff --git a/frozen_deps/Crypto/Cipher/ARC2.py b/frozen_deps/Crypto/Cipher/ARC2.py new file mode 100644 index 0000000..b5234e6 --- /dev/null +++ b/frozen_deps/Crypto/Cipher/ARC2.py @@ -0,0 +1,130 @@ +# -*- coding: utf-8 -*- +# +# Cipher/ARC2.py : ARC2.py +# +# =================================================================== +# The contents of this file are dedicated to the public domain. To +# the extent that dedication to the public domain is not available, +# everyone is granted a worldwide, perpetual, royalty-free, +# non-exclusive license to exercise all rights associated with the +# contents of this file for any purpose whatsoever. +# No rights are reserved. +# +# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, +# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND +# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS +# BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN +# ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN +# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +# SOFTWARE. +# =================================================================== +"""RC2 symmetric cipher + +RC2_ (Rivest's Cipher version 2) is a symmetric block cipher designed +by Ron Rivest in 1987. The cipher started as a proprietary design, +that was reverse engineered and anonymously posted on Usenet in 1996. +For this reason, the algorithm was first called *Alleged* RC2 (ARC2), +since the company that owned RC2 (RSA Data Inc.) did not confirm whether +the details leaked into public domain were really correct. + +The company eventually published its full specification in RFC2268_. + +RC2 has a fixed data block size of 8 bytes. Length of its keys can vary from +8 to 128 bits. One particular property of RC2 is that the actual +cryptographic strength of the key (*effective key length*) can be reduced +via a parameter. + +Even though RC2 is not cryptographically broken, it has not been analyzed as +thoroughly as AES, which is also faster than RC2. + +New designs should not use RC2. + +As an example, encryption can be done as follows: + + >>> from Crypto.Cipher import ARC2 + >>> from Crypto import Random + >>> + >>> key = b'Sixteen byte key' + >>> iv = Random.new().read(ARC2.block_size) + >>> cipher = ARC2.new(key, ARC2.MODE_CFB, iv) + >>> msg = iv + cipher.encrypt(b'Attack at dawn') + +.. _RC2: http://en.wikipedia.org/wiki/RC2 +.. _RFC2268: http://tools.ietf.org/html/rfc2268 + +:undocumented: __revision__, __package__ +""" + +__revision__ = "$Id$" + +from Crypto.Cipher import blockalgo +from Crypto.Cipher import _ARC2 + +class RC2Cipher (blockalgo.BlockAlgo): + """RC2 cipher object""" + + def __init__(self, key, *args, **kwargs): + """Initialize an ARC2 cipher object + + See also `new()` at the module level.""" + blockalgo.BlockAlgo.__init__(self, _ARC2, key, *args, **kwargs) + +def new(key, *args, **kwargs): + """Create a new RC2 cipher + + :Parameters: + key : byte string + The secret key to use in the symmetric cipher. + Its length can vary from 1 to 128 bytes. + :Keywords: + mode : a *MODE_** constant + The chaining mode to use for encryption or decryption. + Default is `MODE_ECB`. + IV : byte string + The initialization vector to use for encryption or decryption. + + It is ignored for `MODE_ECB` and `MODE_CTR`. + + For `MODE_OPENPGP`, IV must be `block_size` bytes long for encryption + and `block_size` +2 bytes for decryption (in the latter case, it is + actually the *encrypted* IV which was prefixed to the ciphertext). + It is mandatory. + + For all other modes, it must be `block_size` bytes longs. It is optional and + when not present it will be given a default value of all zeroes. + counter : callable + (*Only* `MODE_CTR`). A stateful function that returns the next + *counter block*, which is a byte string of `block_size` bytes. + For better performance, use `Crypto.Util.Counter`. + segment_size : integer + (*Only* `MODE_CFB`).The number of bits the plaintext and ciphertext + are segmented in. + It must be a multiple of 8. If 0 or not specified, it will be assumed to be 8. + effective_keylen : integer + Maximum cryptographic strength of the key, in bits. + It can vary from 0 to 1024. The default value is 1024. + + :Return: an `RC2Cipher` object + """ + return RC2Cipher(key, *args, **kwargs) + +#: Electronic Code Book (ECB). See `blockalgo.MODE_ECB`. +MODE_ECB = 1 +#: Cipher-Block Chaining (CBC). See `blockalgo.MODE_CBC`. +MODE_CBC = 2 +#: Cipher FeedBack (CFB). See `blockalgo.MODE_CFB`. +MODE_CFB = 3 +#: This mode should not be used. +MODE_PGP = 4 +#: Output FeedBack (OFB). See `blockalgo.MODE_OFB`. +MODE_OFB = 5 +#: CounTer Mode (CTR). See `blockalgo.MODE_CTR`. +MODE_CTR = 6 +#: OpenPGP Mode. See `blockalgo.MODE_OPENPGP`. +MODE_OPENPGP = 7 +#: Size of a data block (in bytes) +block_size = 8 +#: Size of a key (in bytes) +key_size = range(1,16+1) + diff --git a/frozen_deps/Crypto/Cipher/ARC4.py b/frozen_deps/Crypto/Cipher/ARC4.py new file mode 100644 index 0000000..d83f75b --- /dev/null +++ b/frozen_deps/Crypto/Cipher/ARC4.py @@ -0,0 +1,120 @@ +# -*- coding: utf-8 -*- +# +# Cipher/ARC4.py : ARC4 +# +# =================================================================== +# The contents of this file are dedicated to the public domain. To +# the extent that dedication to the public domain is not available, +# everyone is granted a worldwide, perpetual, royalty-free, +# non-exclusive license to exercise all rights associated with the +# contents of this file for any purpose whatsoever. +# No rights are reserved. +# +# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, +# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND +# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS +# BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN +# ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN +# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +# SOFTWARE. +# =================================================================== +"""ARC4 symmetric cipher + +ARC4_ (Alleged RC4) is an implementation of RC4 (Rivest's Cipher version 4), +a symmetric stream cipher designed by Ron Rivest in 1987. + +The cipher started as a proprietary design, that was reverse engineered and +anonymously posted on Usenet in 1994. The company that owns RC4 (RSA Data +Inc.) never confirmed the correctness of the leaked algorithm. + +Unlike RC2, the company has never published the full specification of RC4, +of whom it still holds the trademark. + +ARC4 keys can vary in length from 40 to 2048 bits. + +One problem of ARC4 is that it does not take a nonce or an IV. If it is required +to encrypt multiple messages with the same long-term key, a distinct +independent nonce must be created for each message, and a short-term key must +be derived from the combination of the long-term key and the nonce. +Due to the weak key scheduling algorithm of RC2, the combination must be carried +out with a complex function (e.g. a cryptographic hash) and not by simply +concatenating key and nonce. + +New designs should not use ARC4. A good alternative is AES +(`Crypto.Cipher.AES`) in any of the modes that turn it into a stream cipher (OFB, CFB, or CTR). + +As an example, encryption can be done as follows: + + >>> from Crypto.Cipher import ARC4 + >>> from Crypto.Hash import SHA + >>> from Crypto import Random + >>> + >>> key = b'Very long and confidential key' + >>> nonce = Random.new().read(16) + >>> tempkey = SHA.new(key+nonce).digest() + >>> cipher = ARC4.new(tempkey) + >>> msg = nonce + cipher.encrypt(b'Open the pod bay doors, HAL') + +.. _ARC4: http://en.wikipedia.org/wiki/RC4 + +:undocumented: __revision__, __package__ +""" + +__revision__ = "$Id$" + +from Crypto.Cipher import _ARC4 + +class ARC4Cipher: + """ARC4 cipher object""" + + + def __init__(self, key, *args, **kwargs): + """Initialize an ARC4 cipher object + + See also `new()` at the module level.""" + + self._cipher = _ARC4.new(key, *args, **kwargs) + self.block_size = self._cipher.block_size + self.key_size = self._cipher.key_size + + def encrypt(self, plaintext): + """Encrypt a piece of data. + + :Parameters: + plaintext : byte string + The piece of data to encrypt. It can be of any size. + :Return: the encrypted data (byte string, as long as the + plaintext). + """ + return self._cipher.encrypt(plaintext) + + def decrypt(self, ciphertext): + """Decrypt a piece of data. + + :Parameters: + ciphertext : byte string + The piece of data to decrypt. It can be of any size. + :Return: the decrypted data (byte string, as long as the + ciphertext). + """ + return self._cipher.decrypt(ciphertext) + +def new(key, *args, **kwargs): + """Create a new ARC4 cipher + + :Parameters: + key : byte string + The secret key to use in the symmetric cipher. + It can have any length, with a minimum of 40 bytes. + Its cryptograpic strength is always capped to 2048 bits (256 bytes). + + :Return: an `ARC4Cipher` object + """ + return ARC4Cipher(key, *args, **kwargs) + +#: Size of a data block (in bytes) +block_size = 1 +#: Size of a key (in bytes) +key_size = range(1,256+1) + diff --git a/frozen_deps/Crypto/Cipher/Blowfish.py b/frozen_deps/Crypto/Cipher/Blowfish.py new file mode 100644 index 0000000..8c81d96 --- /dev/null +++ b/frozen_deps/Crypto/Cipher/Blowfish.py @@ -0,0 +1,121 @@ +# -*- coding: utf-8 -*- +# +# Cipher/Blowfish.py : Blowfish +# +# =================================================================== +# The contents of this file are dedicated to the public domain. To +# the extent that dedication to the public domain is not available, +# everyone is granted a worldwide, perpetual, royalty-free, +# non-exclusive license to exercise all rights associated with the +# contents of this file for any purpose whatsoever. +# No rights are reserved. +# +# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, +# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND +# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS +# BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN +# ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN +# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +# SOFTWARE. +# =================================================================== +"""Blowfish symmetric cipher + +Blowfish_ is a symmetric block cipher designed by Bruce Schneier. + +It has a fixed data block size of 8 bytes and its keys can vary in length +from 32 to 448 bits (4 to 56 bytes). + +Blowfish is deemed secure and it is fast. However, its keys should be chosen +to be big enough to withstand a brute force attack (e.g. at least 16 bytes). + +As an example, encryption can be done as follows: + + >>> from Crypto.Cipher import Blowfish + >>> from Crypto import Random + >>> from struct import pack + >>> + >>> bs = Blowfish.block_size + >>> key = b'An arbitrarily long key' + >>> iv = Random.new().read(bs) + >>> cipher = Blowfish.new(key, Blowfish.MODE_CBC, iv) + >>> plaintext = b'docendo discimus ' + >>> plen = bs - divmod(len(plaintext),bs)[1] + >>> padding = [plen]*plen + >>> padding = pack('b'*plen, *padding) + >>> msg = iv + cipher.encrypt(plaintext + padding) + +.. _Blowfish: http://www.schneier.com/blowfish.html + +:undocumented: __revision__, __package__ +""" + +__revision__ = "$Id$" + +from Crypto.Cipher import blockalgo +from Crypto.Cipher import _Blowfish + +class BlowfishCipher (blockalgo.BlockAlgo): + """Blowfish cipher object""" + + def __init__(self, key, *args, **kwargs): + """Initialize a Blowfish cipher object + + See also `new()` at the module level.""" + blockalgo.BlockAlgo.__init__(self, _Blowfish, key, *args, **kwargs) + +def new(key, *args, **kwargs): + """Create a new Blowfish cipher + + :Parameters: + key : byte string + The secret key to use in the symmetric cipher. + Its length can vary from 4 to 56 bytes. + :Keywords: + mode : a *MODE_** constant + The chaining mode to use for encryption or decryption. + Default is `MODE_ECB`. + IV : byte string + The initialization vector to use for encryption or decryption. + + It is ignored for `MODE_ECB` and `MODE_CTR`. + + For `MODE_OPENPGP`, IV must be `block_size` bytes long for encryption + and `block_size` +2 bytes for decryption (in the latter case, it is + actually the *encrypted* IV which was prefixed to the ciphertext). + It is mandatory. + + For all other modes, it must be `block_size` bytes longs. It is optional and + when not present it will be given a default value of all zeroes. + counter : callable + (*Only* `MODE_CTR`). A stateful function that returns the next + *counter block*, which is a byte string of `block_size` bytes. + For better performance, use `Crypto.Util.Counter`. + segment_size : integer + (*Only* `MODE_CFB`).The number of bits the plaintext and ciphertext + are segmented in. + It must be a multiple of 8. If 0 or not specified, it will be assumed to be 8. + + :Return: a `BlowfishCipher` object + """ + return BlowfishCipher(key, *args, **kwargs) + +#: Electronic Code Book (ECB). See `blockalgo.MODE_ECB`. +MODE_ECB = 1 +#: Cipher-Block Chaining (CBC). See `blockalgo.MODE_CBC`. +MODE_CBC = 2 +#: Cipher FeedBack (CFB). See `blockalgo.MODE_CFB`. +MODE_CFB = 3 +#: This mode should not be used. +MODE_PGP = 4 +#: Output FeedBack (OFB). See `blockalgo.MODE_OFB`. +MODE_OFB = 5 +#: CounTer Mode (CTR). See `blockalgo.MODE_CTR`. +MODE_CTR = 6 +#: OpenPGP Mode. See `blockalgo.MODE_OPENPGP`. +MODE_OPENPGP = 7 +#: Size of a data block (in bytes) +block_size = 8 +#: Size of a key (in bytes) +key_size = range(4,56+1) + diff --git a/frozen_deps/Crypto/Cipher/CAST.py b/frozen_deps/Crypto/Cipher/CAST.py new file mode 100644 index 0000000..89543b2 --- /dev/null +++ b/frozen_deps/Crypto/Cipher/CAST.py @@ -0,0 +1,123 @@ +# -*- coding: utf-8 -*- +# +# Cipher/CAST.py : CAST +# +# =================================================================== +# The contents of this file are dedicated to the public domain. To +# the extent that dedication to the public domain is not available, +# everyone is granted a worldwide, perpetual, royalty-free, +# non-exclusive license to exercise all rights associated with the +# contents of this file for any purpose whatsoever. +# No rights are reserved. +# +# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, +# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND +# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS +# BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN +# ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN +# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +# SOFTWARE. +# =================================================================== +"""CAST-128 symmetric cipher + +CAST-128_ (or CAST5) is a symmetric block cipher specified in RFC2144_. + +It has a fixed data block size of 8 bytes. Its key can vary in length +from 40 to 128 bits. + +CAST is deemed to be cryptographically secure, but its usage is not widespread. +Keys of sufficient length should be used to prevent brute force attacks +(128 bits are recommended). + +As an example, encryption can be done as follows: + + >>> from Crypto.Cipher import CAST + >>> from Crypto import Random + >>> + >>> key = b'Sixteen byte key' + >>> iv = Random.new().read(CAST.block_size) + >>> cipher = CAST.new(key, CAST.MODE_OPENPGP, iv) + >>> plaintext = b'sona si latine loqueris ' + >>> msg = cipher.encrypt(plaintext) + >>> + ... + >>> eiv = msg[:CAST.block_size+2] + >>> ciphertext = msg[CAST.block_size+2:] + >>> cipher = CAST.new(key, CAST.MODE_OPENPGP, eiv) + >>> print cipher.decrypt(ciphertext) + +.. _CAST-128: http://en.wikipedia.org/wiki/CAST-128 +.. _RFC2144: http://tools.ietf.org/html/rfc2144 + +:undocumented: __revision__, __package__ +""" + +__revision__ = "$Id$" + +from Crypto.Cipher import blockalgo +from Crypto.Cipher import _CAST + +class CAST128Cipher(blockalgo.BlockAlgo): + """CAST-128 cipher object""" + + def __init__(self, key, *args, **kwargs): + """Initialize a CAST-128 cipher object + + See also `new()` at the module level.""" + blockalgo.BlockAlgo.__init__(self, _CAST, key, *args, **kwargs) + +def new(key, *args, **kwargs): + """Create a new CAST-128 cipher + + :Parameters: + key : byte string + The secret key to use in the symmetric cipher. + Its length may vary from 5 to 16 bytes. + :Keywords: + mode : a *MODE_** constant + The chaining mode to use for encryption or decryption. + Default is `MODE_ECB`. + IV : byte string + The initialization vector to use for encryption or decryption. + + It is ignored for `MODE_ECB` and `MODE_CTR`. + + For `MODE_OPENPGP`, IV must be `block_size` bytes long for encryption + and `block_size` +2 bytes for decryption (in the latter case, it is + actually the *encrypted* IV which was prefixed to the ciphertext). + It is mandatory. + + For all other modes, it must be `block_size` bytes longs. It is optional and + when not present it will be given a default value of all zeroes. + counter : callable + (*Only* `MODE_CTR`). A stateful function that returns the next + *counter block*, which is a byte string of `block_size` bytes. + For better performance, use `Crypto.Util.Counter`. + segment_size : integer + (*Only* `MODE_CFB`).The number of bits the plaintext and ciphertext + are segmented in. + It must be a multiple of 8. If 0 or not specified, it will be assumed to be 8. + + :Return: an `CAST128Cipher` object + """ + return CAST128Cipher(key, *args, **kwargs) + +#: Electronic Code Book (ECB). See `blockalgo.MODE_ECB`. +MODE_ECB = 1 +#: Cipher-Block Chaining (CBC). See `blockalgo.MODE_CBC`. +MODE_CBC = 2 +#: Cipher FeedBack (CFB). See `blockalgo.MODE_CFB`. +MODE_CFB = 3 +#: This mode should not be used. +MODE_PGP = 4 +#: Output FeedBack (OFB). See `blockalgo.MODE_OFB`. +MODE_OFB = 5 +#: CounTer Mode (CTR). See `blockalgo.MODE_CTR`. +MODE_CTR = 6 +#: OpenPGP Mode. See `blockalgo.MODE_OPENPGP`. +MODE_OPENPGP = 7 +#: Size of a data block (in bytes) +block_size = 8 +#: Size of a key (in bytes) +key_size = range(5,16+1) diff --git a/frozen_deps/Crypto/Cipher/DES.py b/frozen_deps/Crypto/Cipher/DES.py new file mode 100644 index 0000000..2fae42f --- /dev/null +++ b/frozen_deps/Crypto/Cipher/DES.py @@ -0,0 +1,118 @@ +# -*- coding: utf-8 -*- +# +# Cipher/DES.py : DES +# +# =================================================================== +# The contents of this file are dedicated to the public domain. To +# the extent that dedication to the public domain is not available, +# everyone is granted a worldwide, perpetual, royalty-free, +# non-exclusive license to exercise all rights associated with the +# contents of this file for any purpose whatsoever. +# No rights are reserved. +# +# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, +# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND +# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS +# BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN +# ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN +# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +# SOFTWARE. +# =================================================================== +"""DES symmetric cipher + +DES `(Data Encryption Standard)`__ is a symmetric block cipher standardized +by NIST_ . It has a fixed data block size of 8 bytes. +Its keys are 64 bits long, even though 8 bits were used for integrity (now they +are ignored) and do not contribute to securty. + +DES is cryptographically secure, but its key length is too short by nowadays +standards and it could be brute forced with some effort. + +DES should not be used for new designs. Use `AES`. + +As an example, encryption can be done as follows: + + >>> from Crypto.Cipher import DES3 + >>> from Crypto import Random + >>> + >>> key = b'Sixteen byte key' + >>> iv = Random.new().read(DES3.block_size) + >>> cipher = DES3.new(key, DES3.MODE_OFB, iv) + >>> plaintext = b'sona si latine loqueris ' + >>> msg = iv + cipher.encrypt(plaintext) + +.. __: http://en.wikipedia.org/wiki/Data_Encryption_Standard +.. _NIST: http://csrc.nist.gov/publications/fips/fips46-3/fips46-3.pdf + +:undocumented: __revision__, __package__ +""" + +__revision__ = "$Id$" + +from Crypto.Cipher import blockalgo +from Crypto.Cipher import _DES + +class DESCipher(blockalgo.BlockAlgo): + """DES cipher object""" + + def __init__(self, key, *args, **kwargs): + """Initialize a DES cipher object + + See also `new()` at the module level.""" + blockalgo.BlockAlgo.__init__(self, _DES, key, *args, **kwargs) + +def new(key, *args, **kwargs): + """Create a new DES cipher + + :Parameters: + key : byte string + The secret key to use in the symmetric cipher. + It must be 8 byte long. The parity bits will be ignored. + :Keywords: + mode : a *MODE_** constant + The chaining mode to use for encryption or decryption. + Default is `MODE_ECB`. + IV : byte string + The initialization vector to use for encryption or decryption. + + It is ignored for `MODE_ECB` and `MODE_CTR`. + + For `MODE_OPENPGP`, IV must be `block_size` bytes long for encryption + and `block_size` +2 bytes for decryption (in the latter case, it is + actually the *encrypted* IV which was prefixed to the ciphertext). + It is mandatory. + + For all other modes, it must be `block_size` bytes longs. It is optional and + when not present it will be given a default value of all zeroes. + counter : callable + (*Only* `MODE_CTR`). A stateful function that returns the next + *counter block*, which is a byte string of `block_size` bytes. + For better performance, use `Crypto.Util.Counter`. + segment_size : integer + (*Only* `MODE_CFB`).The number of bits the plaintext and ciphertext + are segmented in. + It must be a multiple of 8. If 0 or not specified, it will be assumed to be 8. + + :Return: an `DESCipher` object + """ + return DESCipher(key, *args, **kwargs) + +#: Electronic Code Book (ECB). See `blockalgo.MODE_ECB`. +MODE_ECB = 1 +#: Cipher-Block Chaining (CBC). See `blockalgo.MODE_CBC`. +MODE_CBC = 2 +#: Cipher FeedBack (CFB). See `blockalgo.MODE_CFB`. +MODE_CFB = 3 +#: This mode should not be used. +MODE_PGP = 4 +#: Output FeedBack (OFB). See `blockalgo.MODE_OFB`. +MODE_OFB = 5 +#: CounTer Mode (CTR). See `blockalgo.MODE_CTR`. +MODE_CTR = 6 +#: OpenPGP Mode. See `blockalgo.MODE_OPENPGP`. +MODE_OPENPGP = 7 +#: Size of a data block (in bytes) +block_size = 8 +#: Size of a key (in bytes) +key_size = 8 diff --git a/frozen_deps/Crypto/Cipher/DES3.py b/frozen_deps/Crypto/Cipher/DES3.py new file mode 100644 index 0000000..7fedac8 --- /dev/null +++ b/frozen_deps/Crypto/Cipher/DES3.py @@ -0,0 +1,133 @@ +# -*- coding: utf-8 -*- +# +# Cipher/DES3.py : DES3 +# +# =================================================================== +# The contents of this file are dedicated to the public domain. To +# the extent that dedication to the public domain is not available, +# everyone is granted a worldwide, perpetual, royalty-free, +# non-exclusive license to exercise all rights associated with the +# contents of this file for any purpose whatsoever. +# No rights are reserved. +# +# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, +# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND +# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS +# BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN +# ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN +# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +# SOFTWARE. +# =================================================================== +"""Triple DES symmetric cipher + +`Triple DES`__ (or TDES or TDEA or 3DES) is a symmetric block cipher standardized by NIST_. +It has a fixed data block size of 8 bytes. Its keys are 128 (*Option 1*) or 192 +bits (*Option 2*) long. +However, 1 out of 8 bits is used for redundancy and do not contribute to +security. The effective key length is respectively 112 or 168 bits. + +TDES consists of the concatenation of 3 simple `DES` ciphers. + +The plaintext is first DES encrypted with *K1*, then decrypted with *K2*, +and finally encrypted again with *K3*. The ciphertext is decrypted in the reverse manner. + +The 192 bit key is a bundle of three 64 bit independent subkeys: *K1*, *K2*, and *K3*. + +The 128 bit key is split into *K1* and *K2*, whereas *K1=K3*. + +It is important that all subkeys are different, otherwise TDES would degrade to +single `DES`. + +TDES is cryptographically secure, even though it is neither as secure nor as fast +as `AES`. + +As an example, encryption can be done as follows: + + >>> from Crypto.Cipher import DES + >>> from Crypto import Random + >>> from Crypto.Util import Counter + >>> + >>> key = b'-8B key-' + >>> nonce = Random.new().read(DES.block_size/2) + >>> ctr = Counter.new(DES.block_size*8/2, prefix=nonce) + >>> cipher = DES.new(key, DES.MODE_CTR, counter=ctr) + >>> plaintext = b'We are no longer the knights who say ni!' + >>> msg = nonce + cipher.encrypt(plaintext) + +.. __: http://en.wikipedia.org/wiki/Triple_DES +.. _NIST: http://csrc.nist.gov/publications/nistpubs/800-67/SP800-67.pdf + +:undocumented: __revision__, __package__ +""" + +__revision__ = "$Id$" + +from Crypto.Cipher import blockalgo +from Crypto.Cipher import _DES3 + +class DES3Cipher(blockalgo.BlockAlgo): + """TDES cipher object""" + + def __init__(self, key, *args, **kwargs): + """Initialize a TDES cipher object + + See also `new()` at the module level.""" + blockalgo.BlockAlgo.__init__(self, _DES3, key, *args, **kwargs) + +def new(key, *args, **kwargs): + """Create a new TDES cipher + + :Parameters: + key : byte string + The secret key to use in the symmetric cipher. + It must be 16 or 24 bytes long. The parity bits will be ignored. + :Keywords: + mode : a *MODE_** constant + The chaining mode to use for encryption or decryption. + Default is `MODE_ECB`. + IV : byte string + The initialization vector to use for encryption or decryption. + + It is ignored for `MODE_ECB` and `MODE_CTR`. + + For `MODE_OPENPGP`, IV must be `block_size` bytes long for encryption + and `block_size` +2 bytes for decryption (in the latter case, it is + actually the *encrypted* IV which was prefixed to the ciphertext). + It is mandatory. + + For all other modes, it must be `block_size` bytes longs. It is optional and + when not present it will be given a default value of all zeroes. + counter : callable + (*Only* `MODE_CTR`). A stateful function that returns the next + *counter block*, which is a byte string of `block_size` bytes. + For better performance, use `Crypto.Util.Counter`. + segment_size : integer + (*Only* `MODE_CFB`).The number of bits the plaintext and ciphertext + are segmented in. + It must be a multiple of 8. If 0 or not specified, it will be assumed to be 8. + + :Attention: it is important that all 8 byte subkeys are different, + otherwise TDES would degrade to single `DES`. + :Return: an `DES3Cipher` object + """ + return DES3Cipher(key, *args, **kwargs) + +#: Electronic Code Book (ECB). See `blockalgo.MODE_ECB`. +MODE_ECB = 1 +#: Cipher-Block Chaining (CBC). See `blockalgo.MODE_CBC`. +MODE_CBC = 2 +#: Cipher FeedBack (CFB). See `blockalgo.MODE_CFB`. +MODE_CFB = 3 +#: This mode should not be used. +MODE_PGP = 4 +#: Output FeedBack (OFB). See `blockalgo.MODE_OFB`. +MODE_OFB = 5 +#: CounTer Mode (CTR). See `blockalgo.MODE_CTR`. +MODE_CTR = 6 +#: OpenPGP Mode. See `blockalgo.MODE_OPENPGP`. +MODE_OPENPGP = 7 +#: Size of a data block (in bytes) +block_size = 8 +#: Size of a key (in bytes) +key_size = ( 16, 24 ) diff --git a/frozen_deps/Crypto/Cipher/PKCS1_OAEP.py b/frozen_deps/Crypto/Cipher/PKCS1_OAEP.py new file mode 100644 index 0000000..2738ce3 --- /dev/null +++ b/frozen_deps/Crypto/Cipher/PKCS1_OAEP.py @@ -0,0 +1,255 @@ +# -*- coding: utf-8 -*- +# +# Cipher/PKCS1_OAEP.py : PKCS#1 OAEP +# +# =================================================================== +# The contents of this file are dedicated to the public domain. To +# the extent that dedication to the public domain is not available, +# everyone is granted a worldwide, perpetual, royalty-free, +# non-exclusive license to exercise all rights associated with the +# contents of this file for any purpose whatsoever. +# No rights are reserved. +# +# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, +# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND +# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS +# BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN +# ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN +# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +# SOFTWARE. +# =================================================================== + +"""RSA encryption protocol according to PKCS#1 OAEP + +See RFC3447__ or the `original RSA Labs specification`__ . + +This scheme is more properly called ``RSAES-OAEP``. + +As an example, a sender may encrypt a message in this way: + + >>> from Crypto.Cipher import PKCS1_OAEP + >>> from Crypto.PublicKey import RSA + >>> + >>> message = 'To be encrypted' + >>> key = RSA.importKey(open('pubkey.der').read()) + >>> cipher = PKCS1_OAEP.new(key) + >>> ciphertext = cipher.encrypt(message) + +At the receiver side, decryption can be done using the private part of +the RSA key: + + >>> key = RSA.importKey(open('privkey.der').read()) + >>> cipher = PKCS1_OAP.new(key) + >>> message = cipher.decrypt(ciphertext) + +:undocumented: __revision__, __package__ + +.. __: http://www.ietf.org/rfc/rfc3447.txt +.. __: http://www.rsa.com/rsalabs/node.asp?id=2125. +""" + + + +__revision__ = "$Id$" +__all__ = [ 'new', 'PKCS1OAEP_Cipher' ] + +import Crypto.Signature.PKCS1_PSS +import Crypto.Hash.SHA + +from Crypto.Util.py3compat import * +import Crypto.Util.number +from Crypto.Util.number import ceil_div +from Crypto.Util.strxor import strxor + +class PKCS1OAEP_Cipher: + """This cipher can perform PKCS#1 v1.5 OAEP encryption or decryption.""" + + def __init__(self, key, hashAlgo, mgfunc, label): + """Initialize this PKCS#1 OAEP cipher object. + + :Parameters: + key : an RSA key object + If a private half is given, both encryption and decryption are possible. + If a public half is given, only encryption is possible. + hashAlgo : hash object + The hash function to use. This can be a module under `Crypto.Hash` + or an existing hash object created from any of such modules. If not specified, + `Crypto.Hash.SHA` (that is, SHA-1) is used. + mgfunc : callable + A mask generation function that accepts two parameters: a string to + use as seed, and the lenth of the mask to generate, in bytes. + If not specified, the standard MGF1 is used (a safe choice). + label : string + A label to apply to this particular encryption. If not specified, + an empty string is used. Specifying a label does not improve + security. + + :attention: Modify the mask generation function only if you know what you are doing. + Sender and receiver must use the same one. + """ + self._key = key + + if hashAlgo: + self._hashObj = hashAlgo + else: + self._hashObj = Crypto.Hash.SHA + + if mgfunc: + self._mgf = mgfunc + else: + self._mgf = lambda x,y: Crypto.Signature.PKCS1_PSS.MGF1(x,y,self._hashObj) + + self._label = label + + def can_encrypt(self): + """Return True/1 if this cipher object can be used for encryption.""" + return self._key.can_encrypt() + + def can_decrypt(self): + """Return True/1 if this cipher object can be used for decryption.""" + return self._key.can_decrypt() + + def encrypt(self, message): + """Produce the PKCS#1 OAEP encryption of a message. + + This function is named ``RSAES-OAEP-ENCRYPT``, and is specified in + section 7.1.1 of RFC3447. + + :Parameters: + message : string + The message to encrypt, also known as plaintext. It can be of + variable length, but not longer than the RSA modulus (in bytes) + minus 2, minus twice the hash output size. + + :Return: A string, the ciphertext in which the message is encrypted. + It is as long as the RSA modulus (in bytes). + :Raise ValueError: + If the RSA key length is not sufficiently long to deal with the given + message. + """ + # TODO: Verify the key is RSA + + randFunc = self._key._randfunc + + # See 7.1.1 in RFC3447 + modBits = Crypto.Util.number.size(self._key.n) + k = ceil_div(modBits,8) # Convert from bits to bytes + hLen = self._hashObj.digest_size + mLen = len(message) + + # Step 1b + ps_len = k-mLen-2*hLen-2 + if ps_len<0: + raise ValueError("Plaintext is too long.") + # Step 2a + lHash = self._hashObj.new(self._label).digest() + # Step 2b + ps = bchr(0x00)*ps_len + # Step 2c + db = lHash + ps + bchr(0x01) + message + # Step 2d + ros = randFunc(hLen) + # Step 2e + dbMask = self._mgf(ros, k-hLen-1) + # Step 2f + maskedDB = strxor(db, dbMask) + # Step 2g + seedMask = self._mgf(maskedDB, hLen) + # Step 2h + maskedSeed = strxor(ros, seedMask) + # Step 2i + em = bchr(0x00) + maskedSeed + maskedDB + # Step 3a (OS2IP), step 3b (RSAEP), part of step 3c (I2OSP) + m = self._key.encrypt(em, 0)[0] + # Complete step 3c (I2OSP) + c = bchr(0x00)*(k-len(m)) + m + return c + + def decrypt(self, ct): + """Decrypt a PKCS#1 OAEP ciphertext. + + This function is named ``RSAES-OAEP-DECRYPT``, and is specified in + section 7.1.2 of RFC3447. + + :Parameters: + ct : string + The ciphertext that contains the message to recover. + + :Return: A string, the original message. + :Raise ValueError: + If the ciphertext length is incorrect, or if the decryption does not + succeed. + :Raise TypeError: + If the RSA key has no private half. + """ + # TODO: Verify the key is RSA + + # See 7.1.2 in RFC3447 + modBits = Crypto.Util.number.size(self._key.n) + k = ceil_div(modBits,8) # Convert from bits to bytes + hLen = self._hashObj.digest_size + + # Step 1b and 1c + if len(ct) != k or k<hLen+2: + raise ValueError("Ciphertext with incorrect length.") + # Step 2a (O2SIP), 2b (RSADP), and part of 2c (I2OSP) + m = self._key.decrypt(ct) + # Complete step 2c (I2OSP) + em = bchr(0x00)*(k-len(m)) + m + # Step 3a + lHash = self._hashObj.new(self._label).digest() + # Step 3b + y = em[0] + # y must be 0, but we MUST NOT check it here in order not to + # allow attacks like Manger's (http://dl.acm.org/citation.cfm?id=704143) + maskedSeed = em[1:hLen+1] + maskedDB = em[hLen+1:] + # Step 3c + seedMask = self._mgf(maskedDB, hLen) + # Step 3d + seed = strxor(maskedSeed, seedMask) + # Step 3e + dbMask = self._mgf(seed, k-hLen-1) + # Step 3f + db = strxor(maskedDB, dbMask) + # Step 3g + valid = 1 + one = db[hLen:].find(bchr(0x01)) + lHash1 = db[:hLen] + if lHash1!=lHash: + valid = 0 + if one<0: + valid = 0 + if bord(y)!=0: + valid = 0 + if not valid: + raise ValueError("Incorrect decryption.") + # Step 4 + return db[hLen+one+1:] + +def new(key, hashAlgo=None, mgfunc=None, label=b('')): + """Return a cipher object `PKCS1OAEP_Cipher` that can be used to perform PKCS#1 OAEP encryption or decryption. + + :Parameters: + key : RSA key object + The key to use to encrypt or decrypt the message. This is a `Crypto.PublicKey.RSA` object. + Decryption is only possible if *key* is a private RSA key. + hashAlgo : hash object + The hash function to use. This can be a module under `Crypto.Hash` + or an existing hash object created from any of such modules. If not specified, + `Crypto.Hash.SHA` (that is, SHA-1) is used. + mgfunc : callable + A mask generation function that accepts two parameters: a string to + use as seed, and the lenth of the mask to generate, in bytes. + If not specified, the standard MGF1 is used (a safe choice). + label : string + A label to apply to this particular encryption. If not specified, + an empty string is used. Specifying a label does not improve + security. + + :attention: Modify the mask generation function only if you know what you are doing. + Sender and receiver must use the same one. + """ + return PKCS1OAEP_Cipher(key, hashAlgo, mgfunc, label) + diff --git a/frozen_deps/Crypto/Cipher/PKCS1_v1_5.py b/frozen_deps/Crypto/Cipher/PKCS1_v1_5.py new file mode 100644 index 0000000..3602cb0 --- /dev/null +++ b/frozen_deps/Crypto/Cipher/PKCS1_v1_5.py @@ -0,0 +1,226 @@ +# -*- coding: utf-8 -*- +# +# Cipher/PKCS1-v1_5.py : PKCS#1 v1.5 +# +# =================================================================== +# The contents of this file are dedicated to the public domain. To +# the extent that dedication to the public domain is not available, +# everyone is granted a worldwide, perpetual, royalty-free, +# non-exclusive license to exercise all rights associated with the +# contents of this file for any purpose whatsoever. +# No rights are reserved. +# +# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, +# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND +# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS +# BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN +# ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN +# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +# SOFTWARE. +# =================================================================== + +"""RSA encryption protocol according to PKCS#1 v1.5 + +See RFC3447__ or the `original RSA Labs specification`__ . + +This scheme is more properly called ``RSAES-PKCS1-v1_5``. + +**If you are designing a new protocol, consider using the more robust PKCS#1 OAEP.** + +As an example, a sender may encrypt a message in this way: + + >>> from Crypto.Cipher import PKCS1_v1_5 + >>> from Crypto.PublicKey import RSA + >>> from Crypto.Hash import SHA + >>> + >>> message = 'To be encrypted' + >>> h = SHA.new(message) + >>> + >>> key = RSA.importKey(open('pubkey.der').read()) + >>> cipher = PKCS1_v1_5.new(key) + >>> ciphertext = cipher.encrypt(message+h.digest()) + +At the receiver side, decryption can be done using the private part of +the RSA key: + + >>> From Crypto.Hash import SHA + >>> from Crypto import Random + >>> + >>> key = RSA.importKey(open('privkey.der').read()) + >>> + >>> dsize = SHA.digest_size + >>> sentinel = Random.new().read(15+dsize) # Let's assume that average data length is 15 + >>> + >>> cipher = PKCS1_v1_5.new(key) + >>> message = cipher.decrypt(ciphertext, sentinel) + >>> + >>> digest = SHA.new(message[:-dsize]).digest() + >>> if digest==message[-dsize:]: # Note how we DO NOT look for the sentinel + >>> print "Encryption was correct." + >>> else: + >>> print "Encryption was not correct." + +:undocumented: __revision__, __package__ + +.. __: http://www.ietf.org/rfc/rfc3447.txt +.. __: http://www.rsa.com/rsalabs/node.asp?id=2125. +""" + +__revision__ = "$Id$" +__all__ = [ 'new', 'PKCS115_Cipher' ] + +from Crypto.Util.number import ceil_div +from Crypto.Util.py3compat import * +import Crypto.Util.number + +class PKCS115_Cipher: + """This cipher can perform PKCS#1 v1.5 RSA encryption or decryption.""" + + def __init__(self, key): + """Initialize this PKCS#1 v1.5 cipher object. + + :Parameters: + key : an RSA key object + If a private half is given, both encryption and decryption are possible. + If a public half is given, only encryption is possible. + """ + self._key = key + + def can_encrypt(self): + """Return True if this cipher object can be used for encryption.""" + return self._key.can_encrypt() + + def can_decrypt(self): + """Return True if this cipher object can be used for decryption.""" + return self._key.can_decrypt() + + def encrypt(self, message): + """Produce the PKCS#1 v1.5 encryption of a message. + + This function is named ``RSAES-PKCS1-V1_5-ENCRYPT``, and is specified in + section 7.2.1 of RFC3447. + For a complete example see `Crypto.Cipher.PKCS1_v1_5`. + + :Parameters: + message : byte string + The message to encrypt, also known as plaintext. It can be of + variable length, but not longer than the RSA modulus (in bytes) minus 11. + + :Return: A byte string, the ciphertext in which the message is encrypted. + It is as long as the RSA modulus (in bytes). + :Raise ValueError: + If the RSA key length is not sufficiently long to deal with the given + message. + + """ + # TODO: Verify the key is RSA + + randFunc = self._key._randfunc + + # See 7.2.1 in RFC3447 + modBits = Crypto.Util.number.size(self._key.n) + k = ceil_div(modBits,8) # Convert from bits to bytes + mLen = len(message) + + # Step 1 + if mLen > k-11: + raise ValueError("Plaintext is too long.") + # Step 2a + class nonZeroRandByte: + def __init__(self, rf): self.rf=rf + def __call__(self, c): + while bord(c)==0x00: c=self.rf(1)[0] + return c + ps = tobytes(list(map(nonZeroRandByte(randFunc), randFunc(k-mLen-3)))) + # Step 2b + em = b('\x00\x02') + ps + bchr(0x00) + message + # Step 3a (OS2IP), step 3b (RSAEP), part of step 3c (I2OSP) + m = self._key.encrypt(em, 0)[0] + # Complete step 3c (I2OSP) + c = bchr(0x00)*(k-len(m)) + m + return c + + def decrypt(self, ct, sentinel): + """Decrypt a PKCS#1 v1.5 ciphertext. + + This function is named ``RSAES-PKCS1-V1_5-DECRYPT``, and is specified in + section 7.2.2 of RFC3447. + For a complete example see `Crypto.Cipher.PKCS1_v1_5`. + + :Parameters: + ct : byte string + The ciphertext that contains the message to recover. + sentinel : any type + The object to return to indicate that an error was detected during decryption. + + :Return: A byte string. It is either the original message or the ``sentinel`` (in case of an error). + :Raise ValueError: + If the ciphertext length is incorrect + :Raise TypeError: + If the RSA key has no private half. + + :attention: + You should **never** let the party who submitted the ciphertext know that + this function returned the ``sentinel`` value. + Armed with such knowledge (for a fair amount of carefully crafted but invalid ciphertexts), + an attacker is able to recontruct the plaintext of any other encryption that were carried out + with the same RSA public key (see `Bleichenbacher's`__ attack). + + In general, it should not be possible for the other party to distinguish + whether processing at the server side failed because the value returned + was a ``sentinel`` as opposed to a random, invalid message. + + In fact, the second option is not that unlikely: encryption done according to PKCS#1 v1.5 + embeds no good integrity check. There is roughly one chance + in 2^16 for a random ciphertext to be returned as a valid message + (although random looking). + + It is therefore advisabled to: + + 1. Select as ``sentinel`` a value that resembles a plausable random, invalid message. + 2. Not report back an error as soon as you detect a ``sentinel`` value. + Put differently, you should not explicitly check if the returned value is the ``sentinel`` or not. + 3. Cover all possible errors with a single, generic error indicator. + 4. Embed into the definition of ``message`` (at the protocol level) a digest (e.g. ``SHA-1``). + It is recommended for it to be the rightmost part ``message``. + 5. Where possible, monitor the number of errors due to ciphertexts originating from the same party, + and slow down the rate of the requests from such party (or even blacklist it altogether). + + **If you are designing a new protocol, consider using the more robust PKCS#1 OAEP.** + + .. __: http://www.bell-labs.com/user/bleichen/papers/pkcs.ps + + """ + + # TODO: Verify the key is RSA + + # See 7.2.1 in RFC3447 + modBits = Crypto.Util.number.size(self._key.n) + k = ceil_div(modBits,8) # Convert from bits to bytes + + # Step 1 + if len(ct) != k: + raise ValueError("Ciphertext with incorrect length.") + # Step 2a (O2SIP), 2b (RSADP), and part of 2c (I2OSP) + m = self._key.decrypt(ct) + # Complete step 2c (I2OSP) + em = bchr(0x00)*(k-len(m)) + m + # Step 3 + sep = em.find(bchr(0x00),2) + if not em.startswith(b('\x00\x02')) or sep<10: + return sentinel + # Step 4 + return em[sep+1:] + +def new(key): + """Return a cipher object `PKCS115_Cipher` that can be used to perform PKCS#1 v1.5 encryption or decryption. + + :Parameters: + key : RSA key object + The key to use to encrypt or decrypt the message. This is a `Crypto.PublicKey.RSA` object. + Decryption is only possible if *key* is a private RSA key. + + """ + return PKCS115_Cipher(key) + diff --git a/frozen_deps/Crypto/Cipher/XOR.py b/frozen_deps/Crypto/Cipher/XOR.py new file mode 100644 index 0000000..46b8464 --- /dev/null +++ b/frozen_deps/Crypto/Cipher/XOR.py @@ -0,0 +1,86 @@ +# -*- coding: utf-8 -*- +# +# Cipher/XOR.py : XOR +# +# =================================================================== +# The contents of this file are dedicated to the public domain. To +# the extent that dedication to the public domain is not available, +# everyone is granted a worldwide, perpetual, royalty-free, +# non-exclusive license to exercise all rights associated with the +# contents of this file for any purpose whatsoever. +# No rights are reserved. +# +# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, +# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND +# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS +# BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN +# ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN +# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +# SOFTWARE. +# =================================================================== +"""XOR toy cipher + +XOR is one the simplest stream ciphers. Encryption and decryption are +performed by XOR-ing data with a keystream made by contatenating +the key. + +Do not use it for real applications! + +:undocumented: __revision__, __package__ +""" + +__revision__ = "$Id$" + +from Crypto.Cipher import _XOR + +class XORCipher: + """XOR cipher object""" + + def __init__(self, key, *args, **kwargs): + """Initialize a XOR cipher object + + See also `new()` at the module level.""" + self._cipher = _XOR.new(key, *args, **kwargs) + self.block_size = self._cipher.block_size + self.key_size = self._cipher.key_size + + def encrypt(self, plaintext): + """Encrypt a piece of data. + + :Parameters: + plaintext : byte string + The piece of data to encrypt. It can be of any size. + :Return: the encrypted data (byte string, as long as the + plaintext). + """ + return self._cipher.encrypt(plaintext) + + def decrypt(self, ciphertext): + """Decrypt a piece of data. + + :Parameters: + ciphertext : byte string + The piece of data to decrypt. It can be of any size. + :Return: the decrypted data (byte string, as long as the + ciphertext). + """ + return self._cipher.decrypt(ciphertext) + +def new(key, *args, **kwargs): + """Create a new XOR cipher + + :Parameters: + key : byte string + The secret key to use in the symmetric cipher. + Its length may vary from 1 to 32 bytes. + + :Return: an `XORCipher` object + """ + return XORCipher(key, *args, **kwargs) + +#: Size of a data block (in bytes) +block_size = 1 +#: Size of a key (in bytes) +key_size = range(1,32+1) + diff --git a/frozen_deps/Crypto/Cipher/_AES.cpython-38-x86_64-linux-gnu.so b/frozen_deps/Crypto/Cipher/_AES.cpython-38-x86_64-linux-gnu.so Binary files differnew file mode 100755 index 0000000..e9ffeb9 --- /dev/null +++ b/frozen_deps/Crypto/Cipher/_AES.cpython-38-x86_64-linux-gnu.so diff --git a/frozen_deps/Crypto/Cipher/_ARC2.cpython-38-x86_64-linux-gnu.so b/frozen_deps/Crypto/Cipher/_ARC2.cpython-38-x86_64-linux-gnu.so Binary files differnew file mode 100755 index 0000000..b325488 --- /dev/null +++ b/frozen_deps/Crypto/Cipher/_ARC2.cpython-38-x86_64-linux-gnu.so diff --git a/frozen_deps/Crypto/Cipher/_ARC4.cpython-38-x86_64-linux-gnu.so b/frozen_deps/Crypto/Cipher/_ARC4.cpython-38-x86_64-linux-gnu.so Binary files differnew file mode 100755 index 0000000..982a28d --- /dev/null +++ b/frozen_deps/Crypto/Cipher/_ARC4.cpython-38-x86_64-linux-gnu.so diff --git a/frozen_deps/Crypto/Cipher/_Blowfish.cpython-38-x86_64-linux-gnu.so b/frozen_deps/Crypto/Cipher/_Blowfish.cpython-38-x86_64-linux-gnu.so Binary files differnew file mode 100755 index 0000000..2648636 --- /dev/null +++ b/frozen_deps/Crypto/Cipher/_Blowfish.cpython-38-x86_64-linux-gnu.so diff --git a/frozen_deps/Crypto/Cipher/_CAST.cpython-38-x86_64-linux-gnu.so b/frozen_deps/Crypto/Cipher/_CAST.cpython-38-x86_64-linux-gnu.so Binary files differnew file mode 100755 index 0000000..439731a --- /dev/null +++ b/frozen_deps/Crypto/Cipher/_CAST.cpython-38-x86_64-linux-gnu.so diff --git a/frozen_deps/Crypto/Cipher/_DES.cpython-38-x86_64-linux-gnu.so b/frozen_deps/Crypto/Cipher/_DES.cpython-38-x86_64-linux-gnu.so Binary files differnew file mode 100755 index 0000000..e025c0d --- /dev/null +++ b/frozen_deps/Crypto/Cipher/_DES.cpython-38-x86_64-linux-gnu.so diff --git a/frozen_deps/Crypto/Cipher/_DES3.cpython-38-x86_64-linux-gnu.so b/frozen_deps/Crypto/Cipher/_DES3.cpython-38-x86_64-linux-gnu.so Binary files differnew file mode 100755 index 0000000..faef3f9 --- /dev/null +++ b/frozen_deps/Crypto/Cipher/_DES3.cpython-38-x86_64-linux-gnu.so diff --git a/frozen_deps/Crypto/Cipher/_XOR.cpython-38-x86_64-linux-gnu.so b/frozen_deps/Crypto/Cipher/_XOR.cpython-38-x86_64-linux-gnu.so Binary files differnew file mode 100755 index 0000000..43f0560 --- /dev/null +++ b/frozen_deps/Crypto/Cipher/_XOR.cpython-38-x86_64-linux-gnu.so diff --git a/frozen_deps/Crypto/Cipher/__init__.py b/frozen_deps/Crypto/Cipher/__init__.py new file mode 100644 index 0000000..7afed2d --- /dev/null +++ b/frozen_deps/Crypto/Cipher/__init__.py @@ -0,0 +1,83 @@ +# -*- coding: utf-8 -*- +# +# =================================================================== +# The contents of this file are dedicated to the public domain. To +# the extent that dedication to the public domain is not available, +# everyone is granted a worldwide, perpetual, royalty-free, +# non-exclusive license to exercise all rights associated with the +# contents of this file for any purpose whatsoever. +# No rights are reserved. +# +# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, +# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND +# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS +# BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN +# ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN +# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +# SOFTWARE. +# =================================================================== + +"""Symmetric- and asymmetric-key encryption algorithms. + +Encryption algorithms transform plaintext in some way that +is dependent on a key or key pair, producing ciphertext. + +Symmetric algorithms +-------------------- + +Encryption can easily be reversed, if (and, hopefully, only if) +one knows the same key. +In other words, sender and receiver share the same key. + +The symmetric encryption modules here all support the interface described in PEP +272, "API for Block Encryption Algorithms". + +If you don't know which algorithm to choose, use AES because it's +standard and has undergone a fair bit of examination. + +======================== ======= ======================== +Module name Type Description +======================== ======= ======================== +`Crypto.Cipher.AES` Block Advanced Encryption Standard +`Crypto.Cipher.ARC2` Block Alleged RC2 +`Crypto.Cipher.ARC4` Stream Alleged RC4 +`Crypto.Cipher.Blowfish` Block Blowfish +`Crypto.Cipher.CAST` Block CAST +`Crypto.Cipher.DES` Block The Data Encryption Standard. + Very commonly used in the past, + but today its 56-bit keys are too small. +`Crypto.Cipher.DES3` Block Triple DES. +`Crypto.Cipher.XOR` Stream The simple XOR cipher. +======================== ======= ======================== + + +Asymmetric algorithms +--------------------- + +For asymmetric algorithms, the key to be used for decryption is totally +different and cannot be derived in a feasible way from the key used +for encryption. Put differently, sender and receiver each own one half +of a key pair. The encryption key is often called ``public`` whereas +the decryption key is called ``private``. + +========================== ======================= +Module name Description +========================== ======================= +`Crypto.Cipher.PKCS1_v1_5` PKCS#1 v1.5 encryption, based on RSA key pairs +`Crypto.Cipher.PKCS1_OAEP` PKCS#1 OAEP encryption, based on RSA key pairs +========================== ======================= + +:undocumented: __revision__, __package__, _AES, _ARC2, _ARC4, _Blowfish + _CAST, _DES, _DES3, _XOR +""" + +__all__ = ['AES', 'ARC2', 'ARC4', + 'Blowfish', 'CAST', 'DES', 'DES3', + 'XOR', + 'PKCS1_v1_5', 'PKCS1_OAEP' + ] + +__revision__ = "$Id$" + + diff --git a/frozen_deps/Crypto/Cipher/blockalgo.py b/frozen_deps/Crypto/Cipher/blockalgo.py new file mode 100644 index 0000000..dd183dc --- /dev/null +++ b/frozen_deps/Crypto/Cipher/blockalgo.py @@ -0,0 +1,296 @@ +# -*- coding: utf-8 -*- +# +# Cipher/blockalgo.py +# +# =================================================================== +# The contents of this file are dedicated to the public domain. To +# the extent that dedication to the public domain is not available, +# everyone is granted a worldwide, perpetual, royalty-free, +# non-exclusive license to exercise all rights associated with the +# contents of this file for any purpose whatsoever. +# No rights are reserved. +# +# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, +# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND +# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS +# BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN +# ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN +# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +# SOFTWARE. +# =================================================================== +"""Module with definitions common to all block ciphers.""" + +import sys +if sys.version_info[0] == 2 and sys.version_info[1] == 1: + from Crypto.Util.py21compat import * +from Crypto.Util.py3compat import * + +#: *Electronic Code Book (ECB)*. +#: This is the simplest encryption mode. Each of the plaintext blocks +#: is directly encrypted into a ciphertext block, independently of +#: any other block. This mode exposes frequency of symbols +#: in your plaintext. Other modes (e.g. *CBC*) should be used instead. +#: +#: See `NIST SP800-38A`_ , Section 6.1 . +#: +#: .. _`NIST SP800-38A` : http://csrc.nist.gov/publications/nistpubs/800-38a/sp800-38a.pdf +MODE_ECB = 1 + +#: *Cipher-Block Chaining (CBC)*. Each of the ciphertext blocks depends +#: on the current and all previous plaintext blocks. An Initialization Vector +#: (*IV*) is required. +#: +#: The *IV* is a data block to be transmitted to the receiver. +#: The *IV* can be made public, but it must be authenticated by the receiver and +#: it should be picked randomly. +#: +#: See `NIST SP800-38A`_ , Section 6.2 . +#: +#: .. _`NIST SP800-38A` : http://csrc.nist.gov/publications/nistpubs/800-38a/sp800-38a.pdf +MODE_CBC = 2 + +#: *Cipher FeedBack (CFB)*. This mode is similar to CBC, but it transforms +#: the underlying block cipher into a stream cipher. Plaintext and ciphertext +#: are processed in *segments* of **s** bits. The mode is therefore sometimes +#: labelled **s**-bit CFB. An Initialization Vector (*IV*) is required. +#: +#: When encrypting, each ciphertext segment contributes to the encryption of +#: the next plaintext segment. +#: +#: This *IV* is a data block to be transmitted to the receiver. +#: The *IV* can be made public, but it should be picked randomly. +#: Reusing the same *IV* for encryptions done with the same key lead to +#: catastrophic cryptographic failures. +#: +#: See `NIST SP800-38A`_ , Section 6.3 . +#: +#: .. _`NIST SP800-38A` : http://csrc.nist.gov/publications/nistpubs/800-38a/sp800-38a.pdf +MODE_CFB = 3 + +#: This mode should not be used. +MODE_PGP = 4 + +#: *Output FeedBack (OFB)*. This mode is very similar to CBC, but it +#: transforms the underlying block cipher into a stream cipher. +#: The keystream is the iterated block encryption of an Initialization Vector (*IV*). +#: +#: The *IV* is a data block to be transmitted to the receiver. +#: The *IV* can be made public, but it should be picked randomly. +#: +#: Reusing the same *IV* for encryptions done with the same key lead to +#: catastrophic cryptograhic failures. +#: +#: See `NIST SP800-38A`_ , Section 6.4 . +#: +#: .. _`NIST SP800-38A` : http://csrc.nist.gov/publications/nistpubs/800-38a/sp800-38a.pdf +MODE_OFB = 5 + +#: *CounTeR (CTR)*. This mode is very similar to ECB, in that +#: encryption of one block is done independently of all other blocks. +#: Unlike ECB, the block *position* contributes to the encryption and no +#: information leaks about symbol frequency. +#: +#: Each message block is associated to a *counter* which must be unique +#: across all messages that get encrypted with the same key (not just within +#: the same message). The counter is as big as the block size. +#: +#: Counters can be generated in several ways. The most straightword one is +#: to choose an *initial counter block* (which can be made public, similarly +#: to the *IV* for the other modes) and increment its lowest **m** bits by +#: one (modulo *2^m*) for each block. In most cases, **m** is chosen to be half +#: the block size. +#: +#: Reusing the same *initial counter block* for encryptions done with the same +#: key lead to catastrophic cryptograhic failures. +#: +#: See `NIST SP800-38A`_ , Section 6.5 (for the mode) and Appendix B (for how +#: to manage the *initial counter block*). +#: +#: .. _`NIST SP800-38A` : http://csrc.nist.gov/publications/nistpubs/800-38a/sp800-38a.pdf +MODE_CTR = 6 + +#: OpenPGP. This mode is a variant of CFB, and it is only used in PGP and OpenPGP_ applications. +#: An Initialization Vector (*IV*) is required. +#: +#: Unlike CFB, the IV is not transmitted to the receiver. Instead, the *encrypted* IV is. +#: The IV is a random data block. Two of its bytes are duplicated to act as a checksum +#: for the correctness of the key. The encrypted IV is therefore 2 bytes longer than +#: the clean IV. +#: +#: .. _OpenPGP: http://tools.ietf.org/html/rfc4880 +MODE_OPENPGP = 7 + +def _getParameter(name, index, args, kwargs, default=None): + """Find a parameter in tuple and dictionary arguments a function receives""" + param = kwargs.get(name) + if len(args)>index: + if param: + raise ValueError("Parameter '%s' is specified twice" % name) + param = args[index] + return param or default + +class BlockAlgo: + """Class modelling an abstract block cipher.""" + + def __init__(self, factory, key, *args, **kwargs): + self.mode = _getParameter('mode', 0, args, kwargs, default=MODE_ECB) + self.block_size = factory.block_size + + if self.mode != MODE_OPENPGP: + self._cipher = factory.new(key, *args, **kwargs) + self.IV = self._cipher.IV + else: + # OPENPGP mode. For details, see 13.9 in RCC4880. + # + # A few members are specifically created for this mode: + # - _encrypted_iv, set in this constructor + # - _done_first_block, set to True after the first encryption + # - _done_last_block, set to True after a partial block is processed + + self._done_first_block = False + self._done_last_block = False + self.IV = _getParameter('iv', 1, args, kwargs) + if not self.IV: + raise ValueError("MODE_OPENPGP requires an IV") + + # Instantiate a temporary cipher to process the IV + IV_cipher = factory.new(key, MODE_CFB, + b('\x00')*self.block_size, # IV for CFB + segment_size=self.block_size*8) + + # The cipher will be used for... + if len(self.IV) == self.block_size: + # ... encryption + self._encrypted_IV = IV_cipher.encrypt( + self.IV + self.IV[-2:] + # Plaintext + b('\x00')*(self.block_size-2) # Padding + )[:self.block_size+2] + elif len(self.IV) == self.block_size+2: + # ... decryption + self._encrypted_IV = self.IV + self.IV = IV_cipher.decrypt(self.IV + # Ciphertext + b('\x00')*(self.block_size-2) # Padding + )[:self.block_size+2] + if self.IV[-2:] != self.IV[-4:-2]: + raise ValueError("Failed integrity check for OPENPGP IV") + self.IV = self.IV[:-2] + else: + raise ValueError("Length of IV must be %d or %d bytes for MODE_OPENPGP" + % (self.block_size, self.block_size+2)) + + # Instantiate the cipher for the real PGP data + self._cipher = factory.new(key, MODE_CFB, + self._encrypted_IV[-self.block_size:], + segment_size=self.block_size*8) + + def encrypt(self, plaintext): + """Encrypt data with the key and the parameters set at initialization. + + The cipher object is stateful; encryption of a long block + of data can be broken up in two or more calls to `encrypt()`. + That is, the statement: + + >>> c.encrypt(a) + c.encrypt(b) + + is always equivalent to: + + >>> c.encrypt(a+b) + + That also means that you cannot reuse an object for encrypting + or decrypting other data with the same key. + + This function does not perform any padding. + + - For `MODE_ECB`, `MODE_CBC`, and `MODE_OFB`, *plaintext* length + (in bytes) must be a multiple of *block_size*. + + - For `MODE_CFB`, *plaintext* length (in bytes) must be a multiple + of *segment_size*/8. + + - For `MODE_CTR`, *plaintext* can be of any length. + + - For `MODE_OPENPGP`, *plaintext* must be a multiple of *block_size*, + unless it is the last chunk of the message. + + :Parameters: + plaintext : byte string + The piece of data to encrypt. + :Return: + the encrypted data, as a byte string. It is as long as + *plaintext* with one exception: when encrypting the first message + chunk with `MODE_OPENPGP`, the encypted IV is prepended to the + returned ciphertext. + """ + + if self.mode == MODE_OPENPGP: + padding_length = (self.block_size - len(plaintext) % self.block_size) % self.block_size + if padding_length>0: + # CFB mode requires ciphertext to have length multiple of block size, + # but PGP mode allows the last block to be shorter + if self._done_last_block: + raise ValueError("Only the last chunk is allowed to have length not multiple of %d bytes", + self.block_size) + self._done_last_block = True + padded = plaintext + b('\x00')*padding_length + res = self._cipher.encrypt(padded)[:len(plaintext)] + else: + res = self._cipher.encrypt(plaintext) + if not self._done_first_block: + res = self._encrypted_IV + res + self._done_first_block = True + return res + + return self._cipher.encrypt(plaintext) + + def decrypt(self, ciphertext): + """Decrypt data with the key and the parameters set at initialization. + + The cipher object is stateful; decryption of a long block + of data can be broken up in two or more calls to `decrypt()`. + That is, the statement: + + >>> c.decrypt(a) + c.decrypt(b) + + is always equivalent to: + + >>> c.decrypt(a+b) + + That also means that you cannot reuse an object for encrypting + or decrypting other data with the same key. + + This function does not perform any padding. + + - For `MODE_ECB`, `MODE_CBC`, and `MODE_OFB`, *ciphertext* length + (in bytes) must be a multiple of *block_size*. + + - For `MODE_CFB`, *ciphertext* length (in bytes) must be a multiple + of *segment_size*/8. + + - For `MODE_CTR`, *ciphertext* can be of any length. + + - For `MODE_OPENPGP`, *plaintext* must be a multiple of *block_size*, + unless it is the last chunk of the message. + + :Parameters: + ciphertext : byte string + The piece of data to decrypt. + :Return: the decrypted data (byte string, as long as *ciphertext*). + """ + if self.mode == MODE_OPENPGP: + padding_length = (self.block_size - len(ciphertext) % self.block_size) % self.block_size + if padding_length>0: + # CFB mode requires ciphertext to have length multiple of block size, + # but PGP mode allows the last block to be shorter + if self._done_last_block: + raise ValueError("Only the last chunk is allowed to have length not multiple of %d bytes", + self.block_size) + self._done_last_block = True + padded = ciphertext + b('\x00')*padding_length + res = self._cipher.decrypt(padded)[:len(ciphertext)] + else: + res = self._cipher.decrypt(ciphertext) + return res + + return self._cipher.decrypt(ciphertext) + diff --git a/frozen_deps/Crypto/Hash/HMAC.py b/frozen_deps/Crypto/Hash/HMAC.py new file mode 100644 index 0000000..324f534 --- /dev/null +++ b/frozen_deps/Crypto/Hash/HMAC.py @@ -0,0 +1,212 @@ +# HMAC.py - Implements the HMAC algorithm as described by RFC 2104. +# +# =================================================================== +# Portions Copyright (c) 2001, 2002, 2003 Python Software Foundation; +# All Rights Reserved +# +# This file contains code from the Python 2.2 hmac.py module (the +# "Original Code"), with modifications made after it was incorporated +# into PyCrypto (the "Modifications"). +# +# To the best of our knowledge, the Python Software Foundation is the +# copyright holder of the Original Code, and has licensed it under the +# Python 2.2 license. See the file LEGAL/copy/LICENSE.python-2.2 for +# details. +# +# The Modifications to this file are dedicated to the public domain. +# To the extent that dedication to the public domain is not available, +# everyone is granted a worldwide, perpetual, royalty-free, +# non-exclusive license to exercise all rights associated with the +# contents of this file for any purpose whatsoever. No rights are +# reserved. +# +# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, +# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND +# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS +# BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN +# ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN +# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +# SOFTWARE. +# =================================================================== + + +"""HMAC (Hash-based Message Authentication Code) algorithm + +HMAC is a MAC defined in RFC2104_ and FIPS-198_ and constructed using +a cryptograpic hash algorithm. +It is usually named *HMAC-X*, where *X* is the hash algorithm; for +instance *HMAC-SHA1* or *HMAC-MD5*. + +The strength of an HMAC depends on: + + - the strength of the hash algorithm + - the length and entropy of the secret key + +An example of possible usage is the following: + + >>> from Crypto.Hash import HMAC + >>> + >>> secret = b'Swordfish' + >>> h = HMAC.new(secret) + >>> h.update(b'Hello') + >>> print h.hexdigest() + +.. _RFC2104: http://www.ietf.org/rfc/rfc2104.txt +.. _FIPS-198: http://csrc.nist.gov/publications/fips/fips198/fips-198a.pdf +""" + +# This is just a copy of the Python 2.2 HMAC module, modified to work when +# used on versions of Python before 2.2. + +__revision__ = "$Id$" + +__all__ = ['new', 'digest_size', 'HMAC' ] + +from Crypto.Util.strxor import strxor_c +from Crypto.Util.py3compat import * + +#: The size of the authentication tag produced by the MAC. +#: It matches the digest size on the underlying +#: hashing module used. +digest_size = None + +class HMAC: + """Class that implements HMAC""" + + #: The size of the authentication tag produced by the MAC. + #: It matches the digest size on the underlying + #: hashing module used. + digest_size = None + + def __init__(self, key, msg = None, digestmod = None): + """Create a new HMAC object. + + :Parameters: + key : byte string + secret key for the MAC object. + It must be long enough to match the expected security level of the + MAC. However, there is no benefit in using keys longer than the + `digest_size` of the underlying hash algorithm. + msg : byte string + The very first chunk of the message to authenticate. + It is equivalent to an early call to `update()`. Optional. + :Parameter digestmod: + The hash algorithm the HMAC is based on. + Default is `Crypto.Hash.MD5`. + :Type digestmod: + A hash module or object instantiated from `Crypto.Hash` + """ + if digestmod is None: + from . import MD5 + digestmod = MD5 + + self.digestmod = digestmod + self.outer = digestmod.new() + self.inner = digestmod.new() + try: + self.digest_size = digestmod.digest_size + except AttributeError: + self.digest_size = len(self.outer.digest()) + + try: + # The block size is 128 bytes for SHA384 and SHA512 and 64 bytes + # for the others hash function + blocksize = digestmod.block_size + except AttributeError: + blocksize = 64 + + ipad = 0x36 + opad = 0x5C + + if len(key) > blocksize: + key = digestmod.new(key).digest() + + key = key + bchr(0) * (blocksize - len(key)) + self.outer.update(strxor_c(key, opad)) + self.inner.update(strxor_c(key, ipad)) + if (msg): + self.update(msg) + + def update(self, msg): + """Continue authentication of a message by consuming the next chunk of data. + + Repeated calls are equivalent to a single call with the concatenation + of all the arguments. In other words: + + >>> m.update(a); m.update(b) + + is equivalent to: + + >>> m.update(a+b) + + :Parameters: + msg : byte string + The next chunk of the message being authenticated + """ + + self.inner.update(msg) + + def copy(self): + """Return a copy ("clone") of the MAC object. + + The copy will have the same internal state as the original MAC + object. + This can be used to efficiently compute the MAC of strings that + share a common initial substring. + + :Returns: An `HMAC` object + """ + other = HMAC(b("")) + other.digestmod = self.digestmod + other.inner = self.inner.copy() + other.outer = self.outer.copy() + return other + + def digest(self): + """Return the **binary** (non-printable) MAC of the message that has + been authenticated so far. + + This method does not change the state of the MAC object. + You can continue updating the object after calling this function. + + :Return: A byte string of `digest_size` bytes. It may contain non-ASCII + characters, including null bytes. + """ + h = self.outer.copy() + h.update(self.inner.digest()) + return h.digest() + + def hexdigest(self): + """Return the **printable** MAC of the message that has been + authenticated so far. + + This method does not change the state of the MAC object. + + :Return: A string of 2* `digest_size` bytes. It contains only + hexadecimal ASCII digits. + """ + return "".join(["%02x" % bord(x) + for x in tuple(self.digest())]) + +def new(key, msg = None, digestmod = None): + """Create a new HMAC object. + + :Parameters: + key : byte string + key for the MAC object. + It must be long enough to match the expected security level of the + MAC. However, there is no benefit in using keys longer than the + `digest_size` of the underlying hash algorithm. + msg : byte string + The very first chunk of the message to authenticate. + It is equivalent to an early call to `HMAC.update()`. + Optional. + :Parameter digestmod: + The hash to use to implement the HMAC. Default is `Crypto.Hash.MD5`. + :Type digestmod: + A hash module or instantiated object from `Crypto.Hash` + :Returns: An `HMAC` object + """ + return HMAC(key, msg, digestmod) + diff --git a/frozen_deps/Crypto/Hash/MD2.py b/frozen_deps/Crypto/Hash/MD2.py new file mode 100644 index 0000000..dac959e --- /dev/null +++ b/frozen_deps/Crypto/Hash/MD2.py @@ -0,0 +1,91 @@ +# -*- coding: utf-8 -*- +# +# =================================================================== +# The contents of this file are dedicated to the public domain. To +# the extent that dedication to the public domain is not available, +# everyone is granted a worldwide, perpetual, royalty-free, +# non-exclusive license to exercise all rights associated with the +# contents of this file for any purpose whatsoever. +# No rights are reserved. +# +# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, +# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND +# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS +# BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN +# ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN +# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +# SOFTWARE. +# =================================================================== + +"""MD2 cryptographic hash algorithm. + +MD2 is specified in RFC1319_ and it produces the 128 bit digest of a message. + + >>> from Crypto.Hash import MD2 + >>> + >>> h = MD2.new() + >>> h.update(b'Hello') + >>> print h.hexdigest() + +MD2 stand for Message Digest version 2, and it was invented by Rivest in 1989. + +This algorithm is both slow and insecure. Do not use it for new designs. + +.. _RFC1319: http://tools.ietf.org/html/rfc1319 +""" + +_revision__ = "$Id$" + +__all__ = ['new', 'digest_size', 'MD2Hash' ] + +from Crypto.Util.py3compat import * +from Crypto.Hash.hashalgo import HashAlgo + +import Crypto.Hash._MD2 as _MD2 +hashFactory = _MD2 + +class MD2Hash(HashAlgo): + """Class that implements an MD2 hash + + :undocumented: block_size + """ + + #: ASN.1 Object identifier (OID):: + #: + #: id-md2 OBJECT IDENTIFIER ::= { + #: iso(1) member-body(2) us(840) rsadsi(113549) + #: digestAlgorithm(2) 2 + #: } + #: + #: This value uniquely identifies the MD2 algorithm. + oid = b('\x06\x08\x2a\x86\x48\x86\xf7\x0d\x02\x02') + + digest_size = 16 + block_size = 16 + + def __init__(self, data=None): + HashAlgo.__init__(self, hashFactory, data) + + def new(self, data=None): + return MD2Hash(data) + +def new(data=None): + """Return a fresh instance of the hash object. + + :Parameters: + data : byte string + The very first chunk of the message to hash. + It is equivalent to an early call to `MD2Hash.update()`. + Optional. + + :Return: An `MD2Hash` object + """ + return MD2Hash().new(data) + +#: The size of the resulting hash in bytes. +digest_size = MD2Hash.digest_size + +#: The internal block size of the hash algorithm in bytes. +block_size = MD2Hash.block_size + diff --git a/frozen_deps/Crypto/Hash/MD4.py b/frozen_deps/Crypto/Hash/MD4.py new file mode 100644 index 0000000..e28a201 --- /dev/null +++ b/frozen_deps/Crypto/Hash/MD4.py @@ -0,0 +1,91 @@ +# -*- coding: utf-8 -*- +# +# =================================================================== +# The contents of this file are dedicated to the public domain. To +# the extent that dedication to the public domain is not available, +# everyone is granted a worldwide, perpetual, royalty-free, +# non-exclusive license to exercise all rights associated with the +# contents of this file for any purpose whatsoever. +# No rights are reserved. +# +# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, +# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND +# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS +# BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN +# ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN +# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +# SOFTWARE. +# =================================================================== + +"""MD4 cryptographic hash algorithm. + +MD4 is specified in RFC1320_ and produces the 128 bit digest of a message. + + >>> from Crypto.Hash import MD4 + >>> + >>> h = MD4.new() + >>> h.update(b'Hello') + >>> print h.hexdigest() + +MD4 stand for Message Digest version 4, and it was invented by Rivest in 1990. + +This algorithm is insecure. Do not use it for new designs. + +.. _RFC1320: http://tools.ietf.org/html/rfc1320 +""" + +_revision__ = "$Id$" + +__all__ = ['new', 'digest_size', 'MD4Hash' ] + +from Crypto.Util.py3compat import * +from Crypto.Hash.hashalgo import HashAlgo + +import Crypto.Hash._MD4 as _MD4 +hashFactory = _MD4 + +class MD4Hash(HashAlgo): + """Class that implements an MD4 hash + + :undocumented: block_size + """ + + #: ASN.1 Object identifier (OID):: + #: + #: id-md2 OBJECT IDENTIFIER ::= { + #: iso(1) member-body(2) us(840) rsadsi(113549) + #: digestAlgorithm(2) 4 + #: } + #: + #: This value uniquely identifies the MD4 algorithm. + oid = b('\x06\x08\x2a\x86\x48\x86\xf7\x0d\x02\x04') + + digest_size = 16 + block_size = 64 + + def __init__(self, data=None): + HashAlgo.__init__(self, hashFactory, data) + + def new(self, data=None): + return MD4Hash(data) + +def new(data=None): + """Return a fresh instance of the hash object. + + :Parameters: + data : byte string + The very first chunk of the message to hash. + It is equivalent to an early call to `MD4Hash.update()`. + Optional. + + :Return: A `MD4Hash` object + """ + return MD4Hash().new(data) + +#: The size of the resulting hash in bytes. +digest_size = MD4Hash.digest_size + +#: The internal block size of the hash algorithm in bytes. +block_size = MD4Hash.block_size + diff --git a/frozen_deps/Crypto/Hash/MD5.py b/frozen_deps/Crypto/Hash/MD5.py new file mode 100644 index 0000000..18e9e7b --- /dev/null +++ b/frozen_deps/Crypto/Hash/MD5.py @@ -0,0 +1,97 @@ +# -*- coding: utf-8 -*- +# +# =================================================================== +# The contents of this file are dedicated to the public domain. To +# the extent that dedication to the public domain is not available, +# everyone is granted a worldwide, perpetual, royalty-free, +# non-exclusive license to exercise all rights associated with the +# contents of this file for any purpose whatsoever. +# No rights are reserved. +# +# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, +# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND +# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS +# BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN +# ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN +# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +# SOFTWARE. +# =================================================================== + +"""MD5 cryptographic hash algorithm. + +MD5 is specified in RFC1321_ and produces the 128 bit digest of a message. + + >>> from Crypto.Hash import MD5 + >>> + >>> h = MD5.new() + >>> h.update(b'Hello') + >>> print h.hexdigest() + +MD5 stand for Message Digest version 5, and it was invented by Rivest in 1991. + +This algorithm is insecure. Do not use it for new designs. + +.. _RFC1321: http://tools.ietf.org/html/rfc1321 +""" + +_revision__ = "$Id$" + +__all__ = ['new', 'digest_size', 'MD5Hash' ] + +from Crypto.Util.py3compat import * +from Crypto.Hash.hashalgo import HashAlgo + +try: + # The md5 module is deprecated in Python 2.6, so use hashlib when possible. + import hashlib + hashFactory = hashlib.md5 + +except ImportError: + import md5 + hashFactory = md5 + +class MD5Hash(HashAlgo): + """Class that implements an MD5 hash + + :undocumented: block_size + """ + + #: ASN.1 Object identifier (OID):: + #: + #: id-md5 OBJECT IDENTIFIER ::= { + #: iso(1) member-body(2) us(840) rsadsi(113549) + #: digestAlgorithm(2) 5 + #: } + #: + #: This value uniquely identifies the MD5 algorithm. + oid = b('\x06\x08\x2a\x86\x48\x86\xf7\x0d\x02\x05') + + digest_size = 16 + block_size = 64 + + def __init__(self, data=None): + HashAlgo.__init__(self, hashFactory, data) + + def new(self, data=None): + return MD5Hash(data) + +def new(data=None): + """Return a fresh instance of the hash object. + + :Parameters: + data : byte string + The very first chunk of the message to hash. + It is equivalent to an early call to `MD5Hash.update()`. + Optional. + + :Return: A `MD5Hash` object + """ + return MD5Hash().new(data) + +#: The size of the resulting hash in bytes. +digest_size = MD5Hash.digest_size + +#: The internal block size of the hash algorithm in bytes. +block_size = MD5Hash.block_size + diff --git a/frozen_deps/Crypto/Hash/RIPEMD.py b/frozen_deps/Crypto/Hash/RIPEMD.py new file mode 100644 index 0000000..33099cb --- /dev/null +++ b/frozen_deps/Crypto/Hash/RIPEMD.py @@ -0,0 +1,94 @@ +# -*- coding: utf-8 -*- +# +# =================================================================== +# The contents of this file are dedicated to the public domain. To +# the extent that dedication to the public domain is not available, +# everyone is granted a worldwide, perpetual, royalty-free, +# non-exclusive license to exercise all rights associated with the +# contents of this file for any purpose whatsoever. +# No rights are reserved. +# +# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, +# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND +# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS +# BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN +# ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN +# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +# SOFTWARE. +# =================================================================== + +"""RIPEMD-160 cryptographic hash algorithm. + +RIPEMD-160_ produces the 160 bit digest of a message. + + >>> from Crypto.Hash import RIPEMD + >>> + >>> h = RIPEMD.new() + >>> h.update(b'Hello') + >>> print h.hexdigest() + +RIPEMD-160 stands for RACE Integrity Primitives Evaluation Message Digest +with a 160 bit digest. It was invented by Dobbertin, Bosselaers, and Preneel. + +This algorithm is considered secure, although it has not been scrutinized as +extensively as SHA-1. Moreover, it provides an informal security level of just +80bits. + +.. _RIPEMD-160: http://homes.esat.kuleuven.be/~bosselae/ripemd160.html +""" + +_revision__ = "$Id$" + +__all__ = ['new', 'digest_size', 'RIPEMD160Hash' ] + +from Crypto.Util.py3compat import * +from Crypto.Hash.hashalgo import HashAlgo + +import Crypto.Hash._RIPEMD160 as _RIPEMD160 +hashFactory = _RIPEMD160 + +class RIPEMD160Hash(HashAlgo): + """Class that implements a RIPMD-160 hash + + :undocumented: block_size + """ + + #: ASN.1 Object identifier (OID):: + #: + #: id-ripemd160 OBJECT IDENTIFIER ::= { + #: iso(1) identified-organization(3) teletrust(36) + #: algorithm(3) hashAlgorithm(2) ripemd160(1) + #: } + #: + #: This value uniquely identifies the RIPMD-160 algorithm. + oid = b("\x06\x05\x2b\x24\x03\x02\x01") + + digest_size = 20 + block_size = 64 + + def __init__(self, data=None): + HashAlgo.__init__(self, hashFactory, data) + + def new(self, data=None): + return RIPEMD160Hash(data) + +def new(data=None): + """Return a fresh instance of the hash object. + + :Parameters: + data : byte string + The very first chunk of the message to hash. + It is equivalent to an early call to `RIPEMD160Hash.update()`. + Optional. + + :Return: A `RIPEMD160Hash` object + """ + return RIPEMD160Hash().new(data) + +#: The size of the resulting hash in bytes. +digest_size = RIPEMD160Hash.digest_size + +#: The internal block size of the hash algorithm in bytes. +block_size = RIPEMD160Hash.block_size + diff --git a/frozen_deps/Crypto/Hash/SHA.py b/frozen_deps/Crypto/Hash/SHA.py new file mode 100644 index 0000000..0bc5917 --- /dev/null +++ b/frozen_deps/Crypto/Hash/SHA.py @@ -0,0 +1,98 @@ +# -*- coding: utf-8 -*- +# +# =================================================================== +# The contents of this file are dedicated to the public domain. To +# the extent that dedication to the public domain is not available, +# everyone is granted a worldwide, perpetual, royalty-free, +# non-exclusive license to exercise all rights associated with the +# contents of this file for any purpose whatsoever. +# No rights are reserved. +# +# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, +# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND +# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS +# BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN +# ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN +# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +# SOFTWARE. +# =================================================================== + +"""SHA-1 cryptographic hash algorithm. + +SHA-1_ produces the 160 bit digest of a message. + + >>> from Crypto.Hash import SHA + >>> + >>> h = SHA.new() + >>> h.update(b'Hello') + >>> print h.hexdigest() + +*SHA* stands for Secure Hash Algorithm. + +This algorithm is not considered secure. Do not use it for new designs. + +.. _SHA-1: http://csrc.nist.gov/publications/fips/fips180-2/fips180-2.pdf +""" + +_revision__ = "$Id$" + +__all__ = ['new', 'digest_size', 'SHA1Hash' ] + +from Crypto.Util.py3compat import * +from Crypto.Hash.hashalgo import HashAlgo + +try: + # The sha module is deprecated in Python 2.6, so use hashlib when possible. + import hashlib + hashFactory = hashlib.sha1 + +except ImportError: + import sha + hashFactory = sha + +class SHA1Hash(HashAlgo): + """Class that implements a SHA-1 hash + + :undocumented: block_size + """ + + #: ASN.1 Object identifier (OID):: + #: + #: id-sha1 OBJECT IDENTIFIER ::= { + #: iso(1) identified-organization(3) oiw(14) secsig(3) + #: algorithms(2) 26 + #: } + #: + #: This value uniquely identifies the SHA-1 algorithm. + oid = b('\x06\x05\x2b\x0e\x03\x02\x1a') + + digest_size = 20 + block_size = 64 + + def __init__(self, data=None): + HashAlgo.__init__(self, hashFactory, data) + + def new(self, data=None): + return SHA1Hash(data) + +def new(data=None): + """Return a fresh instance of the hash object. + + :Parameters: + data : byte string + The very first chunk of the message to hash. + It is equivalent to an early call to `SHA1Hash.update()`. + Optional. + + :Return: A `SHA1Hash` object + """ + return SHA1Hash().new(data) + +#: The size of the resulting hash in bytes. +digest_size = SHA1Hash.digest_size + +#: The internal block size of the hash algorithm in bytes. +block_size = SHA1Hash.block_size + + diff --git a/frozen_deps/Crypto/Hash/SHA224.py b/frozen_deps/Crypto/Hash/SHA224.py new file mode 100644 index 0000000..959b56d --- /dev/null +++ b/frozen_deps/Crypto/Hash/SHA224.py @@ -0,0 +1,95 @@ +# -*- coding: utf-8 -*- +# +# =================================================================== +# The contents of this file are dedicated to the public domain. To +# the extent that dedication to the public domain is not available, +# everyone is granted a worldwide, perpetual, royalty-free, +# non-exclusive license to exercise all rights associated with the +# contents of this file for any purpose whatsoever. +# No rights are reserved. +# +# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, +# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND +# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS +# BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN +# ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN +# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +# SOFTWARE. +# =================================================================== + +"""SHA-224 cryptographic hash algorithm. + +SHA-224 belongs to the SHA-2_ family of cryptographic hashes. +It produces the 224 bit digest of a message. + + >>> from Crypto.Hash import SHA224 + >>> + >>> h = SHA224.new() + >>> h.update(b'Hello') + >>> print h.hexdigest() + +*SHA* stands for Secure Hash Algorithm. + +.. _SHA-2: http://csrc.nist.gov/publications/fips/fips180-2/fips180-2.pdf +""" + +_revision__ = "$Id$" + +__all__ = ['new', 'digest_size', 'SHA224Hash' ] + +from Crypto.Util.py3compat import * +from Crypto.Hash.hashalgo import HashAlgo + +try: + import hashlib + hashFactory = hashlib.sha224 + +except ImportError: + from Crypto.Hash import _SHA224 + hashFactory = _SHA224 + +class SHA224Hash(HashAlgo): + """Class that implements a SHA-224 hash + + :undocumented: block_size + """ + + #: ASN.1 Object identifier (OID):: + #: + #: id-sha224 OBJECT IDENTIFIER ::= { + #: joint-iso-itu-t(2) country(16) us(840) organization(1) gov(101) csor(3) + #: nistalgorithm(4) hashalgs(2) 4 + #: } + #: + #: This value uniquely identifies the SHA-224 algorithm. + oid = b('\x06\x09\x60\x86\x48\x01\x65\x03\x04\x02\x04') + + digest_size = 28 + block_size = 64 + + def __init__(self, data=None): + HashAlgo.__init__(self, hashFactory, data) + + def new(self, data=None): + return SHA224Hash(data) + +def new(data=None): + """Return a fresh instance of the hash object. + + :Parameters: + data : byte string + The very first chunk of the message to hash. + It is equivalent to an early call to `SHA224Hash.update()`. + Optional. + + :Return: A `SHA224Hash` object + """ + return SHA224Hash().new(data) + +#: The size of the resulting hash in bytes. +digest_size = SHA224Hash.digest_size + +#: The internal block size of the hash algorithm in bytes. +block_size = SHA224Hash.block_size + diff --git a/frozen_deps/Crypto/Hash/SHA256.py b/frozen_deps/Crypto/Hash/SHA256.py new file mode 100644 index 0000000..b0a99b3 --- /dev/null +++ b/frozen_deps/Crypto/Hash/SHA256.py @@ -0,0 +1,95 @@ +# -*- coding: utf-8 -*- +# +# =================================================================== +# The contents of this file are dedicated to the public domain. To +# the extent that dedication to the public domain is not available, +# everyone is granted a worldwide, perpetual, royalty-free, +# non-exclusive license to exercise all rights associated with the +# contents of this file for any purpose whatsoever. +# No rights are reserved. +# +# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, +# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND +# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS +# BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN +# ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN +# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +# SOFTWARE. +# =================================================================== + +"""SHA-256 cryptographic hash algorithm. + +SHA-256 belongs to the SHA-2_ family of cryptographic hashes. +It produces the 256 bit digest of a message. + + >>> from Crypto.Hash import SHA256 + >>> + >>> h = SHA256.new() + >>> h.update(b'Hello') + >>> print h.hexdigest() + +*SHA* stands for Secure Hash Algorithm. + +.. _SHA-2: http://csrc.nist.gov/publications/fips/fips180-2/fips180-2.pdf +""" + +_revision__ = "$Id$" + +__all__ = ['new', 'digest_size', 'SHA256Hash' ] + +from Crypto.Util.py3compat import * +from Crypto.Hash.hashalgo import HashAlgo + +try: + import hashlib + hashFactory = hashlib.sha256 + +except ImportError: + from Crypto.Hash import _SHA256 + hashFactory = _SHA256 + +class SHA256Hash(HashAlgo): + """Class that implements a SHA-256 hash + + :undocumented: block_size + """ + + #: ASN.1 Object identifier (OID):: + #: + #: id-sha256 OBJECT IDENTIFIER ::= { + #: joint-iso-itu-t(2) country(16) us(840) organization(1) + #: gov(101) csor(3) nistalgorithm(4) hashalgs(2) 1 + #: } + #: + #: This value uniquely identifies the SHA-256 algorithm. + oid = b('\x06\x09\x60\x86\x48\x01\x65\x03\x04\x02\x01') + + digest_size = 32 + block_size = 64 + + def __init__(self, data=None): + HashAlgo.__init__(self, hashFactory, data) + + def new(self, data=None): + return SHA256Hash(data) + +def new(data=None): + """Return a fresh instance of the hash object. + + :Parameters: + data : byte string + The very first chunk of the message to hash. + It is equivalent to an early call to `SHA256Hash.update()`. + Optional. + + :Return: A `SHA256Hash` object + """ + return SHA256Hash().new(data) + +#: The size of the resulting hash in bytes. +digest_size = SHA256Hash.digest_size + +#: The internal block size of the hash algorithm in bytes. +block_size = SHA256Hash.block_size + diff --git a/frozen_deps/Crypto/Hash/SHA384.py b/frozen_deps/Crypto/Hash/SHA384.py new file mode 100644 index 0000000..3490b02 --- /dev/null +++ b/frozen_deps/Crypto/Hash/SHA384.py @@ -0,0 +1,96 @@ +# -*- coding: utf-8 -*- +# +# =================================================================== +# The contents of this file are dedicated to the public domain. To +# the extent that dedication to the public domain is not available, +# everyone is granted a worldwide, perpetual, royalty-free, +# non-exclusive license to exercise all rights associated with the +# contents of this file for any purpose whatsoever. +# No rights are reserved. +# +# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, +# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND +# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS +# BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN +# ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN +# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +# SOFTWARE. +# =================================================================== + +"""SHA-384 cryptographic hash algorithm. + +SHA-384 belongs to the SHA-2_ family of cryptographic hashes. +It produces the 384 bit digest of a message. + + >>> from Crypto.Hash import SHA384 + >>> + >>> h = SHA384.new() + >>> h.update(b'Hello') + >>> print h.hexdigest() + +*SHA* stands for Secure Hash Algorithm. + +.. _SHA-2: http://csrc.nist.gov/publications/fips/fips180-2/fips180-2.pdf +""" + +_revision__ = "$Id$" + +__all__ = ['new', 'digest_size', 'SHA384Hash' ] + +from Crypto.Util.py3compat import * +from Crypto.Hash.hashalgo import HashAlgo + +try: + import hashlib + hashFactory = hashlib.sha384 + +except ImportError: + from Crypto.Hash import _SHA384 + hashFactory = _SHA384 + +class SHA384Hash(HashAlgo): + """Class that implements a SHA-384 hash + + :undocumented: block_size + """ + + #: ASN.1 Object identifier (OID):: + #: + #: id-sha384 OBJECT IDENTIFIER ::= { + #: joint-iso-itu-t(2) country(16) us(840) organization(1) gov(101) csor(3) + #: nistalgorithm(4) hashalgs(2) 2 + #: } + #: + #: This value uniquely identifies the SHA-384 algorithm. + oid = b('\x06\x09\x60\x86\x48\x01\x65\x03\x04\x02\x02') + + digest_size = 48 + block_size = 128 + + def __init__(self, data=None): + HashAlgo.__init__(self, hashFactory, data) + + def new(self, data=None): + return SHA384Hash(data) + +def new(data=None): + """Return a fresh instance of the hash object. + + :Parameters: + data : byte string + The very first chunk of the message to hash. + It is equivalent to an early call to `SHA384Hash.update()`. + Optional. + + :Return: A `SHA384Hash` object + """ + return SHA384Hash().new(data) + +#: The size of the resulting hash in bytes. +digest_size = SHA384Hash.digest_size + +#: The internal block size of the hash algorithm in bytes. +block_size = SHA384Hash.block_size + + diff --git a/frozen_deps/Crypto/Hash/SHA512.py b/frozen_deps/Crypto/Hash/SHA512.py new file mode 100644 index 0000000..d57548d --- /dev/null +++ b/frozen_deps/Crypto/Hash/SHA512.py @@ -0,0 +1,95 @@ +# -*- coding: utf-8 -*- +# +# =================================================================== +# The contents of this file are dedicated to the public domain. To +# the extent that dedication to the public domain is not available, +# everyone is granted a worldwide, perpetual, royalty-free, +# non-exclusive license to exercise all rights associated with the +# contents of this file for any purpose whatsoever. +# No rights are reserved. +# +# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, +# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND +# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS +# BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN +# ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN +# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +# SOFTWARE. +# =================================================================== + +"""SHA-512 cryptographic hash algorithm. + +SHA-512 belongs to the SHA-2_ family of cryptographic hashes. +It produces the 512 bit digest of a message. + + >>> from Crypto.Hash import SHA512 + >>> + >>> h = SHA512.new() + >>> h.update(b'Hello') + >>> print h.hexdigest() + +*SHA* stands for Secure Hash Algorithm. + +.. _SHA-2: http://csrc.nist.gov/publications/fips/fips180-2/fips180-2.pdf +""" + +_revision__ = "$Id$" + +__all__ = ['new', 'digest_size', 'SHA512Hash' ] + +from Crypto.Util.py3compat import * +from Crypto.Hash.hashalgo import HashAlgo + +try: + import hashlib + hashFactory = hashlib.sha512 + +except ImportError: + from Crypto.Hash import _SHA512 + hashFactory = _SHA512 + +class SHA512Hash(HashAlgo): + """Class that implements a SHA-512 hash + + :undocumented: block_size + """ + + #: ASN.1 Object identifier (OID):: + #: + #: id-sha512 OBJECT IDENTIFIER ::= { + #: joint-iso-itu-t(2) + #: country(16) us(840) organization(1) gov(101) csor(3) nistalgorithm(4) hashalgs(2) 3 + #: } + #: + #: This value uniquely identifies the SHA-512 algorithm. + oid = b('\x06\x09\x60\x86\x48\x01\x65\x03\x04\x02\x03') + + digest_size = 64 + block_size = 128 + + def __init__(self, data=None): + HashAlgo.__init__(self, hashFactory, data) + + def new(self, data=None): + return SHA512Hash(data) + +def new(data=None): + """Return a fresh instance of the hash object. + + :Parameters: + data : byte string + The very first chunk of the message to hash. + It is equivalent to an early call to `SHA512Hash.update()`. + Optional. + + :Return: A `SHA512Hash` object + """ + return SHA512Hash().new(data) + +#: The size of the resulting hash in bytes. +digest_size = SHA512Hash.digest_size + +#: The internal block size of the hash algorithm in bytes. +block_size = SHA512Hash.block_size + diff --git a/frozen_deps/Crypto/Hash/_MD2.cpython-38-x86_64-linux-gnu.so b/frozen_deps/Crypto/Hash/_MD2.cpython-38-x86_64-linux-gnu.so Binary files differnew file mode 100755 index 0000000..6fbfc79 --- /dev/null +++ b/frozen_deps/Crypto/Hash/_MD2.cpython-38-x86_64-linux-gnu.so diff --git a/frozen_deps/Crypto/Hash/_MD4.cpython-38-x86_64-linux-gnu.so b/frozen_deps/Crypto/Hash/_MD4.cpython-38-x86_64-linux-gnu.so Binary files differnew file mode 100755 index 0000000..286f3ec --- /dev/null +++ b/frozen_deps/Crypto/Hash/_MD4.cpython-38-x86_64-linux-gnu.so diff --git a/frozen_deps/Crypto/Hash/_RIPEMD160.cpython-38-x86_64-linux-gnu.so b/frozen_deps/Crypto/Hash/_RIPEMD160.cpython-38-x86_64-linux-gnu.so Binary files differnew file mode 100755 index 0000000..a66d804 --- /dev/null +++ b/frozen_deps/Crypto/Hash/_RIPEMD160.cpython-38-x86_64-linux-gnu.so diff --git a/frozen_deps/Crypto/Hash/_SHA224.cpython-38-x86_64-linux-gnu.so b/frozen_deps/Crypto/Hash/_SHA224.cpython-38-x86_64-linux-gnu.so Binary files differnew file mode 100755 index 0000000..eac6cae --- /dev/null +++ b/frozen_deps/Crypto/Hash/_SHA224.cpython-38-x86_64-linux-gnu.so diff --git a/frozen_deps/Crypto/Hash/_SHA256.cpython-38-x86_64-linux-gnu.so b/frozen_deps/Crypto/Hash/_SHA256.cpython-38-x86_64-linux-gnu.so Binary files differnew file mode 100755 index 0000000..0155f47 --- /dev/null +++ b/frozen_deps/Crypto/Hash/_SHA256.cpython-38-x86_64-linux-gnu.so diff --git a/frozen_deps/Crypto/Hash/_SHA384.cpython-38-x86_64-linux-gnu.so b/frozen_deps/Crypto/Hash/_SHA384.cpython-38-x86_64-linux-gnu.so Binary files differnew file mode 100755 index 0000000..3d1049b --- /dev/null +++ b/frozen_deps/Crypto/Hash/_SHA384.cpython-38-x86_64-linux-gnu.so diff --git a/frozen_deps/Crypto/Hash/_SHA512.cpython-38-x86_64-linux-gnu.so b/frozen_deps/Crypto/Hash/_SHA512.cpython-38-x86_64-linux-gnu.so Binary files differnew file mode 100755 index 0000000..e3c5c5c --- /dev/null +++ b/frozen_deps/Crypto/Hash/_SHA512.cpython-38-x86_64-linux-gnu.so diff --git a/frozen_deps/Crypto/Hash/__init__.py b/frozen_deps/Crypto/Hash/__init__.py new file mode 100644 index 0000000..4582c66 --- /dev/null +++ b/frozen_deps/Crypto/Hash/__init__.py @@ -0,0 +1,56 @@ +# -*- coding: utf-8 -*- +# +# =================================================================== +# The contents of this file are dedicated to the public domain. To +# the extent that dedication to the public domain is not available, +# everyone is granted a worldwide, perpetual, royalty-free, +# non-exclusive license to exercise all rights associated with the +# contents of this file for any purpose whatsoever. +# No rights are reserved. +# +# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, +# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND +# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS +# BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN +# ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN +# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +# SOFTWARE. +# =================================================================== + +"""Hashing algorithms + +Hash functions take arbitrary binary strings as input, and produce a random-like output +of fixed size that is dependent on the input; it should be practically infeasible +to derive the original input data given only the hash function's +output. In other words, the hash function is *one-way*. + +It should also not be practically feasible to find a second piece of data +(a *second pre-image*) whose hash is the same as the original message +(*weak collision resistance*). + +Finally, it should not be feasible to find two arbitrary messages with the +same hash (*strong collision resistance*). + +The output of the hash function is called the *digest* of the input message. +In general, the security of a hash function is related to the length of the +digest. If the digest is *n* bits long, its security level is roughly comparable +to the the one offered by an *n/2* bit encryption algorithm. + +Hash functions can be used simply as a integrity check, or, in +association with a public-key algorithm, can be used to implement +digital signatures. + +The hashing modules here all support the interface described in `PEP +247`_ , "API for Cryptographic Hash Functions". + +.. _`PEP 247` : http://www.python.org/dev/peps/pep-0247/ + +:undocumented: _MD2, _MD4, _RIPEMD160, _SHA224, _SHA256, _SHA384, _SHA512 +""" + +__all__ = ['HMAC', 'MD2', 'MD4', 'MD5', 'RIPEMD', 'SHA', + 'SHA224', 'SHA256', 'SHA384', 'SHA512'] +__revision__ = "$Id$" + + diff --git a/frozen_deps/Crypto/Hash/hashalgo.py b/frozen_deps/Crypto/Hash/hashalgo.py new file mode 100644 index 0000000..b38b3a6 --- /dev/null +++ b/frozen_deps/Crypto/Hash/hashalgo.py @@ -0,0 +1,116 @@ +# -*- coding: utf-8 -*- +# +# =================================================================== +# The contents of this file are dedicated to the public domain. To +# the extent that dedication to the public domain is not available, +# everyone is granted a worldwide, perpetual, royalty-free, +# non-exclusive license to exercise all rights associated with the +# contents of this file for any purpose whatsoever. +# No rights are reserved. +# +# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, +# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND +# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS +# BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN +# ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN +# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +# SOFTWARE. +# =================================================================== + +from binascii import hexlify + +class HashAlgo: + """A generic class for an abstract cryptographic hash algorithm. + + :undocumented: block_size + """ + + #: The size of the resulting hash in bytes. + digest_size = None + #: The internal block size of the hash algorithm in bytes. + block_size = None + + def __init__(self, hashFactory, data=None): + """Initialize the hash object. + + :Parameters: + hashFactory : callable + An object that will generate the actual hash implementation. + *hashFactory* must have a *new()* method, or must be directly + callable. + data : byte string + The very first chunk of the message to hash. + It is equivalent to an early call to `update()`. + """ + if hasattr(hashFactory, 'new'): + self._hash = hashFactory.new() + else: + self._hash = hashFactory() + if data: + self.update(data) + + def update(self, data): + """Continue hashing of a message by consuming the next chunk of data. + + Repeated calls are equivalent to a single call with the concatenation + of all the arguments. In other words: + + >>> m.update(a); m.update(b) + + is equivalent to: + + >>> m.update(a+b) + + :Parameters: + data : byte string + The next chunk of the message being hashed. + """ + return self._hash.update(data) + + def digest(self): + """Return the **binary** (non-printable) digest of the message that has been hashed so far. + + This method does not change the state of the hash object. + You can continue updating the object after calling this function. + + :Return: A byte string of `digest_size` bytes. It may contain non-ASCII + characters, including null bytes. + """ + return self._hash.digest() + + def hexdigest(self): + """Return the **printable** digest of the message that has been hashed so far. + + This method does not change the state of the hash object. + + :Return: A string of 2* `digest_size` characters. It contains only + hexadecimal ASCII digits. + """ + return self._hash.hexdigest() + + def copy(self): + """Return a copy ("clone") of the hash object. + + The copy will have the same internal state as the original hash + object. + This can be used to efficiently compute the digests of strings that + share a common initial substring. + + :Return: A hash object of the same type + """ + return self._hash.copy() + + def new(self, data=None): + """Return a fresh instance of the hash object. + + Unlike the `copy` method, the internal state of the object is empty. + + :Parameters: + data : byte string + The next chunk of the message being hashed. + + :Return: A hash object of the same type + """ + pass + diff --git a/frozen_deps/Crypto/Protocol/AllOrNothing.py b/frozen_deps/Crypto/Protocol/AllOrNothing.py new file mode 100644 index 0000000..dd20536 --- /dev/null +++ b/frozen_deps/Crypto/Protocol/AllOrNothing.py @@ -0,0 +1,320 @@ +# +# AllOrNothing.py : all-or-nothing package transformations +# +# Part of the Python Cryptography Toolkit +# +# Written by Andrew M. Kuchling and others +# +# =================================================================== +# The contents of this file are dedicated to the public domain. To +# the extent that dedication to the public domain is not available, +# everyone is granted a worldwide, perpetual, royalty-free, +# non-exclusive license to exercise all rights associated with the +# contents of this file for any purpose whatsoever. +# No rights are reserved. +# +# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, +# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND +# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS +# BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN +# ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN +# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +# SOFTWARE. +# =================================================================== + +"""This file implements all-or-nothing package transformations. + +An all-or-nothing package transformation is one in which some text is +transformed into message blocks, such that all blocks must be obtained before +the reverse transformation can be applied. Thus, if any blocks are corrupted +or lost, the original message cannot be reproduced. + +An all-or-nothing package transformation is not encryption, although a block +cipher algorithm is used. The encryption key is randomly generated and is +extractable from the message blocks. + +This class implements the All-Or-Nothing package transformation algorithm +described in: + +Ronald L. Rivest. "All-Or-Nothing Encryption and The Package Transform" +http://theory.lcs.mit.edu/~rivest/fusion.pdf + +""" + +__revision__ = "$Id$" + +import operator +import sys +from Crypto.Util.number import bytes_to_long, long_to_bytes +from Crypto.Util.py3compat import * +from functools import reduce + +def isInt(x): + test = 0 + try: + test += x + except TypeError: + return 0 + return 1 + +class AllOrNothing: + """Class implementing the All-or-Nothing package transform. + + Methods for subclassing: + + _inventkey(key_size): + Returns a randomly generated key. Subclasses can use this to + implement better random key generating algorithms. The default + algorithm is probably not very cryptographically secure. + + """ + + def __init__(self, ciphermodule, mode=None, IV=None): + """AllOrNothing(ciphermodule, mode=None, IV=None) + + ciphermodule is a module implementing the cipher algorithm to + use. It must provide the PEP272 interface. + + Note that the encryption key is randomly generated + automatically when needed. Optional arguments mode and IV are + passed directly through to the ciphermodule.new() method; they + are the feedback mode and initialization vector to use. All + three arguments must be the same for the object used to create + the digest, and to undigest'ify the message blocks. + """ + + self.__ciphermodule = ciphermodule + self.__mode = mode + self.__IV = IV + self.__key_size = ciphermodule.key_size + if not isInt(self.__key_size) or self.__key_size==0: + self.__key_size = 16 + + __K0digit = bchr(0x69) + + def digest(self, text): + """digest(text:string) : [string] + + Perform the All-or-Nothing package transform on the given + string. Output is a list of message blocks describing the + transformed text, where each block is a string of bit length equal + to the ciphermodule's block_size. + """ + + # generate a random session key and K0, the key used to encrypt the + # hash blocks. Rivest calls this a fixed, publically-known encryption + # key, but says nothing about the security implications of this key or + # how to choose it. + key = self._inventkey(self.__key_size) + K0 = self.__K0digit * self.__key_size + + # we need two cipher objects here, one that is used to encrypt the + # message blocks and one that is used to encrypt the hashes. The + # former uses the randomly generated key, while the latter uses the + # well-known key. + mcipher = self.__newcipher(key) + hcipher = self.__newcipher(K0) + + # Pad the text so that its length is a multiple of the cipher's + # block_size. Pad with trailing spaces, which will be eliminated in + # the undigest() step. + block_size = self.__ciphermodule.block_size + padbytes = block_size - (len(text) % block_size) + text = text + b(' ') * padbytes + + # Run through the algorithm: + # s: number of message blocks (size of text / block_size) + # input sequence: m1, m2, ... ms + # random key K' (`key' in the code) + # Compute output sequence: m'1, m'2, ... m's' for s' = s + 1 + # Let m'i = mi ^ E(K', i) for i = 1, 2, 3, ..., s + # Let m's' = K' ^ h1 ^ h2 ^ ... hs + # where hi = E(K0, m'i ^ i) for i = 1, 2, ... s + # + # The one complication I add is that the last message block is hard + # coded to the number of padbytes added, so that these can be stripped + # during the undigest() step + s = divmod(len(text), block_size)[0] + blocks = [] + hashes = [] + for i in range(1, s+1): + start = (i-1) * block_size + end = start + block_size + mi = text[start:end] + assert len(mi) == block_size + cipherblock = mcipher.encrypt(long_to_bytes(i, block_size)) + mticki = bytes_to_long(mi) ^ bytes_to_long(cipherblock) + blocks.append(mticki) + # calculate the hash block for this block + hi = hcipher.encrypt(long_to_bytes(mticki ^ i, block_size)) + hashes.append(bytes_to_long(hi)) + + # Add the padbytes length as a message block + i = i + 1 + cipherblock = mcipher.encrypt(long_to_bytes(i, block_size)) + mticki = padbytes ^ bytes_to_long(cipherblock) + blocks.append(mticki) + + # calculate this block's hash + hi = hcipher.encrypt(long_to_bytes(mticki ^ i, block_size)) + hashes.append(bytes_to_long(hi)) + + # Now calculate the last message block of the sequence 1..s'. This + # will contain the random session key XOR'd with all the hash blocks, + # so that for undigest(), once all the hash blocks are calculated, the + # session key can be trivially extracted. Calculating all the hash + # blocks requires that all the message blocks be received, thus the + # All-or-Nothing algorithm succeeds. + mtick_stick = bytes_to_long(key) ^ reduce(operator.xor, hashes) + blocks.append(mtick_stick) + + # we convert the blocks to strings since in Python, byte sequences are + # always represented as strings. This is more consistent with the + # model that encryption and hash algorithms always operate on strings. + return [long_to_bytes(i,self.__ciphermodule.block_size) for i in blocks] + + + def undigest(self, blocks): + """undigest(blocks : [string]) : string + + Perform the reverse package transformation on a list of message + blocks. Note that the ciphermodule used for both transformations + must be the same. blocks is a list of strings of bit length + equal to the ciphermodule's block_size. + """ + + # better have at least 2 blocks, for the padbytes package and the hash + # block accumulator + if len(blocks) < 2: + raise ValueError("List must be at least length 2.") + + # blocks is a list of strings. We need to deal with them as long + # integers + blocks = list(map(bytes_to_long, blocks)) + + # Calculate the well-known key, to which the hash blocks are + # encrypted, and create the hash cipher. + K0 = self.__K0digit * self.__key_size + hcipher = self.__newcipher(K0) + block_size = self.__ciphermodule.block_size + + # Since we have all the blocks (or this method would have been called + # prematurely), we can calculate all the hash blocks. + hashes = [] + for i in range(1, len(blocks)): + mticki = blocks[i-1] ^ i + hi = hcipher.encrypt(long_to_bytes(mticki, block_size)) + hashes.append(bytes_to_long(hi)) + + # now we can calculate K' (key). remember the last block contains + # m's' which we don't include here + key = blocks[-1] ^ reduce(operator.xor, hashes) + + # and now we can create the cipher object + mcipher = self.__newcipher(long_to_bytes(key, self.__key_size)) + + # And we can now decode the original message blocks + parts = [] + for i in range(1, len(blocks)): + cipherblock = mcipher.encrypt(long_to_bytes(i, block_size)) + mi = blocks[i-1] ^ bytes_to_long(cipherblock) + parts.append(mi) + + # The last message block contains the number of pad bytes appended to + # the original text string, such that its length was an even multiple + # of the cipher's block_size. This number should be small enough that + # the conversion from long integer to integer should never overflow + padbytes = int(parts[-1]) + text = b('').join(map(long_to_bytes, parts[:-1])) + return text[:-padbytes] + + def _inventkey(self, key_size): + # Return key_size random bytes + from Crypto import Random + return Random.new().read(key_size) + + def __newcipher(self, key): + if self.__mode is None and self.__IV is None: + return self.__ciphermodule.new(key) + elif self.__IV is None: + return self.__ciphermodule.new(key, self.__mode) + else: + return self.__ciphermodule.new(key, self.__mode, self.__IV) + + + +if __name__ == '__main__': + import sys + import getopt + import base64 + + usagemsg = '''\ +Test module usage: %(program)s [-c cipher] [-l] [-h] + +Where: + --cipher module + -c module + Cipher module to use. Default: %(ciphermodule)s + + --aslong + -l + Print the encoded message blocks as long integers instead of base64 + encoded strings + + --help + -h + Print this help message +''' + + ciphermodule = 'AES' + aslong = 0 + + def usage(code, msg=None): + if msg: + print(msg) + print(usagemsg % {'program': sys.argv[0], + 'ciphermodule': ciphermodule}) + sys.exit(code) + + try: + opts, args = getopt.getopt(sys.argv[1:], + 'c:l', ['cipher=', 'aslong']) + except getopt.error as msg: + usage(1, msg) + + if args: + usage(1, 'Too many arguments') + + for opt, arg in opts: + if opt in ('-h', '--help'): + usage(0) + elif opt in ('-c', '--cipher'): + ciphermodule = arg + elif opt in ('-l', '--aslong'): + aslong = 1 + + # ugly hack to force __import__ to give us the end-path module + module = __import__('Crypto.Cipher.'+ciphermodule, None, None, ['new']) + + x = AllOrNothing(module) + print('Original text:\n==========') + print(__doc__) + print('==========') + msgblocks = x.digest(b(__doc__)) + print('message blocks:') + for i, blk in zip(list(range(len(msgblocks))), msgblocks): + # base64 adds a trailing newline + print(' %3d' % i, end=' ') + if aslong: + print(bytes_to_long(blk)) + else: + print(base64.encodestring(blk)[:-1]) + # + # get a new undigest-only object so there's no leakage + y = AllOrNothing(module) + text = y.undigest(msgblocks) + if text == b(__doc__): + print('They match!') + else: + print('They differ!') diff --git a/frozen_deps/Crypto/Protocol/Chaffing.py b/frozen_deps/Crypto/Protocol/Chaffing.py new file mode 100644 index 0000000..bbfcbda --- /dev/null +++ b/frozen_deps/Crypto/Protocol/Chaffing.py @@ -0,0 +1,245 @@ +# +# Chaffing.py : chaffing & winnowing support +# +# Part of the Python Cryptography Toolkit +# +# Written by Andrew M. Kuchling, Barry A. Warsaw, and others +# +# =================================================================== +# The contents of this file are dedicated to the public domain. To +# the extent that dedication to the public domain is not available, +# everyone is granted a worldwide, perpetual, royalty-free, +# non-exclusive license to exercise all rights associated with the +# contents of this file for any purpose whatsoever. +# No rights are reserved. +# +# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, +# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND +# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS +# BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN +# ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN +# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +# SOFTWARE. +# =================================================================== +# +"""This file implements the chaffing algorithm. + +Winnowing and chaffing is a technique for enhancing privacy without requiring +strong encryption. In short, the technique takes a set of authenticated +message blocks (the wheat) and adds a number of chaff blocks which have +randomly chosen data and MAC fields. This means that to an adversary, the +chaff blocks look as valid as the wheat blocks, and so the authentication +would have to be performed on every block. By tailoring the number of chaff +blocks added to the message, the sender can make breaking the message +computationally infeasible. There are many other interesting properties of +the winnow/chaff technique. + +For example, say Alice is sending a message to Bob. She packetizes the +message and performs an all-or-nothing transformation on the packets. Then +she authenticates each packet with a message authentication code (MAC). The +MAC is a hash of the data packet, and there is a secret key which she must +share with Bob (key distribution is an exercise left to the reader). She then +adds a serial number to each packet, and sends the packets to Bob. + +Bob receives the packets, and using the shared secret authentication key, +authenticates the MACs for each packet. Those packets that have bad MACs are +simply discarded. The remainder are sorted by serial number, and passed +through the reverse all-or-nothing transform. The transform means that an +eavesdropper (say Eve) must acquire all the packets before any of the data can +be read. If even one packet is missing, the data is useless. + +There's one twist: by adding chaff packets, Alice and Bob can make Eve's job +much harder, since Eve now has to break the shared secret key, or try every +combination of wheat and chaff packet to read any of the message. The cool +thing is that Bob doesn't need to add any additional code; the chaff packets +are already filtered out because their MACs don't match (in all likelihood -- +since the data and MACs for the chaff packets are randomly chosen it is +possible, but very unlikely that a chaff MAC will match the chaff data). And +Alice need not even be the party adding the chaff! She could be completely +unaware that a third party, say Charles, is adding chaff packets to her +messages as they are transmitted. + +For more information on winnowing and chaffing see this paper: + +Ronald L. Rivest, "Chaffing and Winnowing: Confidentiality without Encryption" +http://theory.lcs.mit.edu/~rivest/chaffing.txt + +""" + +__revision__ = "$Id$" + +from Crypto.Util.number import bytes_to_long + +class Chaff: + """Class implementing the chaff adding algorithm. + + Methods for subclasses: + + _randnum(size): + Returns a randomly generated number with a byte-length equal + to size. Subclasses can use this to implement better random + data and MAC generating algorithms. The default algorithm is + probably not very cryptographically secure. It is most + important that the chaff data does not contain any patterns + that can be used to discern it from wheat data without running + the MAC. + + """ + + def __init__(self, factor=1.0, blocksper=1): + """Chaff(factor:float, blocksper:int) + + factor is the number of message blocks to add chaff to, + expressed as a percentage between 0.0 and 1.0. blocksper is + the number of chaff blocks to include for each block being + chaffed. Thus the defaults add one chaff block to every + message block. By changing the defaults, you can adjust how + computationally difficult it could be for an adversary to + brute-force crack the message. The difficulty is expressed + as: + + pow(blocksper, int(factor * number-of-blocks)) + + For ease of implementation, when factor < 1.0, only the first + int(factor*number-of-blocks) message blocks are chaffed. + """ + + if not (0.0<=factor<=1.0): + raise ValueError("'factor' must be between 0.0 and 1.0") + if blocksper < 0: + raise ValueError("'blocksper' must be zero or more") + + self.__factor = factor + self.__blocksper = blocksper + + + def chaff(self, blocks): + """chaff( [(serial-number:int, data:string, MAC:string)] ) + : [(int, string, string)] + + Add chaff to message blocks. blocks is a list of 3-tuples of the + form (serial-number, data, MAC). + + Chaff is created by choosing a random number of the same + byte-length as data, and another random number of the same + byte-length as MAC. The message block's serial number is + placed on the chaff block and all the packet's chaff blocks + are randomly interspersed with the single wheat block. This + method then returns a list of 3-tuples of the same form. + Chaffed blocks will contain multiple instances of 3-tuples + with the same serial number, but the only way to figure out + which blocks are wheat and which are chaff is to perform the + MAC hash and compare values. + """ + + chaffedblocks = [] + + # count is the number of blocks to add chaff to. blocksper is the + # number of chaff blocks to add per message block that is being + # chaffed. + count = len(blocks) * self.__factor + blocksper = list(range(self.__blocksper)) + for i, wheat in zip(list(range(len(blocks))), blocks): + # it shouldn't matter which of the n blocks we add chaff to, so for + # ease of implementation, we'll just add them to the first count + # blocks + if i < count: + serial, data, mac = wheat + datasize = len(data) + macsize = len(mac) + addwheat = 1 + # add chaff to this block + for j in blocksper: + import sys + chaffdata = self._randnum(datasize) + chaffmac = self._randnum(macsize) + chaff = (serial, chaffdata, chaffmac) + # mix up the order, if the 5th bit is on then put the + # wheat on the list + if addwheat and bytes_to_long(self._randnum(16)) & 0x40: + chaffedblocks.append(wheat) + addwheat = 0 + chaffedblocks.append(chaff) + if addwheat: + chaffedblocks.append(wheat) + else: + # just add the wheat + chaffedblocks.append(wheat) + return chaffedblocks + + def _randnum(self, size): + from Crypto import Random + return Random.new().read(size) + + +if __name__ == '__main__': + text = """\ +We hold these truths to be self-evident, that all men are created equal, that +they are endowed by their Creator with certain unalienable Rights, that among +these are Life, Liberty, and the pursuit of Happiness. That to secure these +rights, Governments are instituted among Men, deriving their just powers from +the consent of the governed. That whenever any Form of Government becomes +destructive of these ends, it is the Right of the People to alter or to +abolish it, and to institute new Government, laying its foundation on such +principles and organizing its powers in such form, as to them shall seem most +likely to effect their Safety and Happiness. +""" + print('Original text:\n==========') + print(text) + print('==========') + + # first transform the text into packets + blocks = [] ; size = 40 + for i in range(0, len(text), size): + blocks.append( text[i:i+size] ) + + # now get MACs for all the text blocks. The key is obvious... + print('Calculating MACs...') + from Crypto.Hash import HMAC, SHA + key = 'Jefferson' + macs = [HMAC.new(key, block, digestmod=SHA).digest() + for block in blocks] + + assert len(blocks) == len(macs) + + # put these into a form acceptable as input to the chaffing procedure + source = [] + m = list(zip(list(range(len(blocks))), blocks, macs)) + print(m) + for i, data, mac in m: + source.append((i, data, mac)) + + # now chaff these + print('Adding chaff...') + c = Chaff(factor=0.5, blocksper=2) + chaffed = c.chaff(source) + + from base64 import encodestring + + # print the chaffed message blocks. meanwhile, separate the wheat from + # the chaff + + wheat = [] + print('chaffed message blocks:') + for i, data, mac in chaffed: + # do the authentication + h = HMAC.new(key, data, digestmod=SHA) + pmac = h.digest() + if pmac == mac: + tag = '-->' + wheat.append(data) + else: + tag = ' ' + # base64 adds a trailing newline + print(tag, '%3d' % i, \ + repr(data), encodestring(mac)[:-1]) + + # now decode the message packets and check it against the original text + print('Undigesting wheat...') + # PY3K: This is meant to be text, do not change to bytes (data) + newtext = "".join(wheat) + if newtext == text: + print('They match!') + else: + print('They differ!') diff --git a/frozen_deps/Crypto/Protocol/KDF.py b/frozen_deps/Crypto/Protocol/KDF.py new file mode 100644 index 0000000..af4e2a6 --- /dev/null +++ b/frozen_deps/Crypto/Protocol/KDF.py @@ -0,0 +1,123 @@ +# +# KDF.py : a collection of Key Derivation Functions +# +# Part of the Python Cryptography Toolkit +# +# =================================================================== +# The contents of this file are dedicated to the public domain. To +# the extent that dedication to the public domain is not available, +# everyone is granted a worldwide, perpetual, royalty-free, +# non-exclusive license to exercise all rights associated with the +# contents of this file for any purpose whatsoever. +# No rights are reserved. +# +# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, +# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND +# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS +# BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN +# ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN +# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +# SOFTWARE. +# =================================================================== + +"""This file contains a collection of standard key derivation functions. + +A key derivation function derives one or more secondary secret keys from +one primary secret (a master key or a pass phrase). + +This is typically done to insulate the secondary keys from each other, +to avoid that leakage of a secondary key compromises the security of the +master key, or to thwart attacks on pass phrases (e.g. via rainbow tables). + +:undocumented: __revision__ +""" + +__revision__ = "$Id$" + +import math +import struct + +from Crypto.Util.py3compat import * +from Crypto.Hash import SHA as SHA1, HMAC +from Crypto.Util.strxor import strxor + +def PBKDF1(password, salt, dkLen, count=1000, hashAlgo=None): + """Derive one key from a password (or passphrase). + + This function performs key derivation according an old version of + the PKCS#5 standard (v1.5). + + This algorithm is called ``PBKDF1``. Even though it is still described + in the latest version of the PKCS#5 standard (version 2, or RFC2898), + newer applications should use the more secure and versatile `PBKDF2` instead. + + :Parameters: + password : string + The secret password or pass phrase to generate the key from. + salt : byte string + An 8 byte string to use for better protection from dictionary attacks. + This value does not need to be kept secret, but it should be randomly + chosen for each derivation. + dkLen : integer + The length of the desired key. Default is 16 bytes, suitable for instance for `Crypto.Cipher.AES`. + count : integer + The number of iterations to carry out. It's recommended to use at least 1000. + hashAlgo : module + The hash algorithm to use, as a module or an object from the `Crypto.Hash` package. + The digest length must be no shorter than ``dkLen``. + The default algorithm is `SHA1`. + + :Return: A byte string of length `dkLen` that can be used as key. + """ + if not hashAlgo: + hashAlgo = SHA1 + password = tobytes(password) + pHash = hashAlgo.new(password+salt) + digest = pHash.digest_size + if dkLen>digest: + raise ValueError("Selected hash algorithm has a too short digest (%d bytes)." % digest) + if len(salt)!=8: + raise ValueError("Salt is not 8 bytes long.") + for i in range(count-1): + pHash = pHash.new(pHash.digest()) + return pHash.digest()[:dkLen] + +def PBKDF2(password, salt, dkLen=16, count=1000, prf=None): + """Derive one or more keys from a password (or passphrase). + + This performs key derivation according to the PKCS#5 standard (v2.0), + by means of the ``PBKDF2`` algorithm. + + :Parameters: + password : string + The secret password or pass phrase to generate the key from. + salt : string + A string to use for better protection from dictionary attacks. + This value does not need to be kept secret, but it should be randomly + chosen for each derivation. It is recommended to be at least 8 bytes long. + dkLen : integer + The cumulative length of the desired keys. Default is 16 bytes, suitable for instance for `Crypto.Cipher.AES`. + count : integer + The number of iterations to carry out. It's recommended to use at least 1000. + prf : callable + A pseudorandom function. It must be a function that returns a pseudorandom string + from two parameters: a secret and a salt. If not specified, HMAC-SHA1 is used. + + :Return: A byte string of length `dkLen` that can be used as key material. + If you wanted multiple keys, just break up this string into segments of the desired length. +""" + password = tobytes(password) + if prf is None: + prf = lambda p,s: HMAC.new(p,s,SHA1).digest() + key = b('') + i = 1 + while len(key)<dkLen: + U = previousU = prf(password,salt+struct.pack(">I", i)) + for j in range(count-1): + previousU = t = prf(password,previousU) + U = strxor(U,t) + key += U + i = i + 1 + return key[:dkLen] + diff --git a/frozen_deps/Crypto/Protocol/__init__.py b/frozen_deps/Crypto/Protocol/__init__.py new file mode 100644 index 0000000..cacc685 --- /dev/null +++ b/frozen_deps/Crypto/Protocol/__init__.py @@ -0,0 +1,41 @@ +# -*- coding: utf-8 -*- +# +# =================================================================== +# The contents of this file are dedicated to the public domain. To +# the extent that dedication to the public domain is not available, +# everyone is granted a worldwide, perpetual, royalty-free, +# non-exclusive license to exercise all rights associated with the +# contents of this file for any purpose whatsoever. +# No rights are reserved. +# +# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, +# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND +# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS +# BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN +# ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN +# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +# SOFTWARE. +# =================================================================== + +"""Cryptographic protocols + +Implements various cryptographic protocols. (Don't expect to find +network protocols here.) + +Crypto.Protocol.AllOrNothing + Transforms a message into a set of message blocks, such that the blocks + can be recombined to get the message back. + +Crypto.Protocol.Chaffing + Takes a set of authenticated message blocks (the wheat) and adds a number + of randomly generated blocks (the chaff). + +Crypto.Protocol.KDF + A collection of standard key derivation functions. + +:undocumented: __revision__ +""" + +__all__ = ['AllOrNothing', 'Chaffing', 'KDF'] +__revision__ = "$Id$" diff --git a/frozen_deps/Crypto/PublicKey/DSA.py b/frozen_deps/Crypto/PublicKey/DSA.py new file mode 100644 index 0000000..648f4b2 --- /dev/null +++ b/frozen_deps/Crypto/PublicKey/DSA.py @@ -0,0 +1,379 @@ +# -*- coding: utf-8 -*- +# +# PublicKey/DSA.py : DSA signature primitive +# +# Written in 2008 by Dwayne C. Litzenberger <[email protected]> +# +# =================================================================== +# The contents of this file are dedicated to the public domain. To +# the extent that dedication to the public domain is not available, +# everyone is granted a worldwide, perpetual, royalty-free, +# non-exclusive license to exercise all rights associated with the +# contents of this file for any purpose whatsoever. +# No rights are reserved. +# +# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, +# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND +# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS +# BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN +# ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN +# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +# SOFTWARE. +# =================================================================== + +"""DSA public-key signature algorithm. + +DSA_ is a widespread public-key signature algorithm. Its security is +based on the discrete logarithm problem (DLP_). Given a cyclic +group, a generator *g*, and an element *h*, it is hard +to find an integer *x* such that *g^x = h*. The problem is believed +to be difficult, and it has been proved such (and therefore secure) for +more than 30 years. + +The group is actually a sub-group over the integers modulo *p*, with *p* prime. +The sub-group order is *q*, which is prime too; it always holds that *(p-1)* is a multiple of *q*. +The cryptographic strength is linked to the magnitude of *p* and *q*. +The signer holds a value *x* (*0<x<q-1*) as private key, and its public +key (*y* where *y=g^x mod p*) is distributed. + +In 2012, a sufficient size is deemed to be 2048 bits for *p* and 256 bits for *q*. +For more information, see the most recent ECRYPT_ report. + +DSA is reasonably secure for new designs. + +The algorithm can only be used for authentication (digital signature). +DSA cannot be used for confidentiality (encryption). + +The values *(p,q,g)* are called *domain parameters*; +they are not sensitive but must be shared by both parties (the signer and the verifier). +Different signers can share the same domain parameters with no security +concerns. + +The DSA signature is twice as big as the size of *q* (64 bytes if *q* is 256 bit +long). + +This module provides facilities for generating new DSA keys and for constructing +them from known components. DSA keys allows you to perform basic signing and +verification. + + >>> from Crypto.Random import random + >>> from Crypto.PublicKey import DSA + >>> from Crypto.Hash import SHA + >>> + >>> message = "Hello" + >>> key = DSA.generate(1024) + >>> h = SHA.new(message).digest() + >>> k = random.StrongRandom().randint(1,key.q-1) + >>> sig = key.sign(h,k) + >>> ... + >>> if key.verify(h,sig): + >>> print "OK" + >>> else: + >>> print "Incorrect signature" + +.. _DSA: http://en.wikipedia.org/wiki/Digital_Signature_Algorithm +.. _DLP: http://www.cosic.esat.kuleuven.be/publications/talk-78.pdf +.. _ECRYPT: http://www.ecrypt.eu.org/documents/D.SPA.17.pdf +""" + +__revision__ = "$Id$" + +__all__ = ['generate', 'construct', 'error', 'DSAImplementation', '_DSAobj'] + +import sys +if sys.version_info[0] == 2 and sys.version_info[1] == 1: + from Crypto.Util.py21compat import * + +from Crypto.PublicKey import _DSA, _slowmath, pubkey +from Crypto import Random + +try: + from Crypto.PublicKey import _fastmath +except ImportError: + _fastmath = None + +class _DSAobj(pubkey.pubkey): + """Class defining an actual DSA key. + + :undocumented: __getstate__, __setstate__, __repr__, __getattr__ + """ + #: Dictionary of DSA parameters. + #: + #: A public key will only have the following entries: + #: + #: - **y**, the public key. + #: - **g**, the generator. + #: - **p**, the modulus. + #: - **q**, the order of the sub-group. + #: + #: A private key will also have: + #: + #: - **x**, the private key. + keydata = ['y', 'g', 'p', 'q', 'x'] + + def __init__(self, implementation, key): + self.implementation = implementation + self.key = key + + def __getattr__(self, attrname): + if attrname in self.keydata: + # For backward compatibility, allow the user to get (not set) the + # DSA key parameters directly from this object. + return getattr(self.key, attrname) + else: + raise AttributeError("%s object has no %r attribute" % (self.__class__.__name__, attrname,)) + + def sign(self, M, K): + """Sign a piece of data with DSA. + + :Parameter M: The piece of data to sign with DSA. It may + not be longer in bit size than the sub-group order (*q*). + :Type M: byte string or long + + :Parameter K: A secret number, chosen randomly in the closed + range *[1,q-1]*. + :Type K: long (recommended) or byte string (not recommended) + + :attention: selection of *K* is crucial for security. Generating a + random number larger than *q* and taking the modulus by *q* is + **not** secure, since smaller values will occur more frequently. + Generating a random number systematically smaller than *q-1* + (e.g. *floor((q-1)/8)* random bytes) is also **not** secure. In general, + it shall not be possible for an attacker to know the value of `any + bit of K`__. + + :attention: The number *K* shall not be reused for any other + operation and shall be discarded immediately. + + :attention: M must be a digest cryptographic hash, otherwise + an attacker may mount an existential forgery attack. + + :Return: A tuple with 2 longs. + + .. __: http://www.di.ens.fr/~pnguyen/pub_NgSh00.htm + """ + return pubkey.pubkey.sign(self, M, K) + + def verify(self, M, signature): + """Verify the validity of a DSA signature. + + :Parameter M: The expected message. + :Type M: byte string or long + + :Parameter signature: The DSA signature to verify. + :Type signature: A tuple with 2 longs as return by `sign` + + :Return: True if the signature is correct, False otherwise. + """ + return pubkey.pubkey.verify(self, M, signature) + + def _encrypt(self, c, K): + raise TypeError("DSA cannot encrypt") + + def _decrypt(self, c): + raise TypeError("DSA cannot decrypt") + + def _blind(self, m, r): + raise TypeError("DSA cannot blind") + + def _unblind(self, m, r): + raise TypeError("DSA cannot unblind") + + def _sign(self, m, k): + return self.key._sign(m, k) + + def _verify(self, m, sig): + (r, s) = sig + return self.key._verify(m, r, s) + + def has_private(self): + return self.key.has_private() + + def size(self): + return self.key.size() + + def can_blind(self): + return False + + def can_encrypt(self): + return False + + def can_sign(self): + return True + + def publickey(self): + return self.implementation.construct((self.key.y, self.key.g, self.key.p, self.key.q)) + + def __getstate__(self): + d = {} + for k in self.keydata: + try: + d[k] = getattr(self.key, k) + except AttributeError: + pass + return d + + def __setstate__(self, d): + if not hasattr(self, 'implementation'): + self.implementation = DSAImplementation() + t = [] + for k in self.keydata: + if k not in d: + break + t.append(d[k]) + self.key = self.implementation._math.dsa_construct(*tuple(t)) + + def __repr__(self): + attrs = [] + for k in self.keydata: + if k == 'p': + attrs.append("p(%d)" % (self.size()+1,)) + elif hasattr(self.key, k): + attrs.append(k) + if self.has_private(): + attrs.append("private") + # PY3K: This is meant to be text, do not change to bytes (data) + return "<%s @0x%x %s>" % (self.__class__.__name__, id(self), ",".join(attrs)) + +class DSAImplementation(object): + """ + A DSA key factory. + + This class is only internally used to implement the methods of the + `Crypto.PublicKey.DSA` module. + """ + + def __init__(self, **kwargs): + """Create a new DSA key factory. + + :Keywords: + use_fast_math : bool + Specify which mathematic library to use: + + - *None* (default). Use fastest math available. + - *True* . Use fast math. + - *False* . Use slow math. + default_randfunc : callable + Specify how to collect random data: + + - *None* (default). Use Random.new().read(). + - not *None* . Use the specified function directly. + :Raise RuntimeError: + When **use_fast_math** =True but fast math is not available. + """ + use_fast_math = kwargs.get('use_fast_math', None) + if use_fast_math is None: # Automatic + if _fastmath is not None: + self._math = _fastmath + else: + self._math = _slowmath + + elif use_fast_math: # Explicitly select fast math + if _fastmath is not None: + self._math = _fastmath + else: + raise RuntimeError("fast math module not available") + + else: # Explicitly select slow math + self._math = _slowmath + + self.error = self._math.error + + # 'default_randfunc' parameter: + # None (default) - use Random.new().read + # not None - use the specified function + self._default_randfunc = kwargs.get('default_randfunc', None) + self._current_randfunc = None + + def _get_randfunc(self, randfunc): + if randfunc is not None: + return randfunc + elif self._current_randfunc is None: + self._current_randfunc = Random.new().read + return self._current_randfunc + + def generate(self, bits, randfunc=None, progress_func=None): + """Randomly generate a fresh, new DSA key. + + :Parameters: + bits : int + Key length, or size (in bits) of the DSA modulus + *p*. + It must be a multiple of 64, in the closed + interval [512,1024]. + randfunc : callable + Random number generation function; it should accept + a single integer N and return a string of random data + N bytes long. + If not specified, a new one will be instantiated + from ``Crypto.Random``. + progress_func : callable + Optional function that will be called with a short string + containing the key parameter currently being generated; + it's useful for interactive applications where a user is + waiting for a key to be generated. + + :attention: You should always use a cryptographically secure random number generator, + such as the one defined in the ``Crypto.Random`` module; **don't** just use the + current time and the ``random`` module. + + :Return: A DSA key object (`_DSAobj`). + + :Raise ValueError: + When **bits** is too little, too big, or not a multiple of 64. + """ + + # Check against FIPS 186-2, which says that the size of the prime p + # must be a multiple of 64 bits between 512 and 1024 + for i in (0, 1, 2, 3, 4, 5, 6, 7, 8): + if bits == 512 + 64*i: + return self._generate(bits, randfunc, progress_func) + + # The March 2006 draft of FIPS 186-3 also allows 2048 and 3072-bit + # primes, but only with longer q values. Since the current DSA + # implementation only supports a 160-bit q, we don't support larger + # values. + raise ValueError("Number of bits in p must be a multiple of 64 between 512 and 1024, not %d bits" % (bits,)) + + def _generate(self, bits, randfunc=None, progress_func=None): + rf = self._get_randfunc(randfunc) + obj = _DSA.generate_py(bits, rf, progress_func) # TODO: Don't use legacy _DSA module + key = self._math.dsa_construct(obj.y, obj.g, obj.p, obj.q, obj.x) + return _DSAobj(self, key) + + def construct(self, tup): + """Construct a DSA key from a tuple of valid DSA components. + + The modulus *p* must be a prime. + + The following equations must apply: + + - p-1 = 0 mod q + - g^x = y mod p + - 0 < x < q + - 1 < g < p + + :Parameters: + tup : tuple + A tuple of long integers, with 4 or 5 items + in the following order: + + 1. Public key (*y*). + 2. Sub-group generator (*g*). + 3. Modulus, finite field order (*p*). + 4. Sub-group order (*q*). + 5. Private key (*x*). Optional. + + :Return: A DSA key object (`_DSAobj`). + """ + key = self._math.dsa_construct(*tup) + return _DSAobj(self, key) + +_impl = DSAImplementation() +generate = _impl.generate +construct = _impl.construct +error = _impl.error + +# vim:set ts=4 sw=4 sts=4 expandtab: + diff --git a/frozen_deps/Crypto/PublicKey/ElGamal.py b/frozen_deps/Crypto/PublicKey/ElGamal.py new file mode 100644 index 0000000..99af71c --- /dev/null +++ b/frozen_deps/Crypto/PublicKey/ElGamal.py @@ -0,0 +1,373 @@ +# +# ElGamal.py : ElGamal encryption/decryption and signatures +# +# Part of the Python Cryptography Toolkit +# +# Originally written by: A.M. Kuchling +# +# =================================================================== +# The contents of this file are dedicated to the public domain. To +# the extent that dedication to the public domain is not available, +# everyone is granted a worldwide, perpetual, royalty-free, +# non-exclusive license to exercise all rights associated with the +# contents of this file for any purpose whatsoever. +# No rights are reserved. +# +# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, +# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND +# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS +# BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN +# ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN +# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +# SOFTWARE. +# =================================================================== + +"""ElGamal public-key algorithm (randomized encryption and signature). + +Signature algorithm +------------------- +The security of the ElGamal signature scheme is based (like DSA) on the discrete +logarithm problem (DLP_). Given a cyclic group, a generator *g*, +and an element *h*, it is hard to find an integer *x* such that *g^x = h*. + +The group is the largest multiplicative sub-group of the integers modulo *p*, +with *p* prime. +The signer holds a value *x* (*0<x<p-1*) as private key, and its public +key (*y* where *y=g^x mod p*) is distributed. + +The ElGamal signature is twice as big as *p*. + +Encryption algorithm +-------------------- +The security of the ElGamal encryption scheme is based on the computational +Diffie-Hellman problem (CDH_). Given a cyclic group, a generator *g*, +and two integers *a* and *b*, it is difficult to find +the element *g^{ab}* when only *g^a* and *g^b* are known, and not *a* and *b*. + +As before, the group is the largest multiplicative sub-group of the integers +modulo *p*, with *p* prime. +The receiver holds a value *a* (*0<a<p-1*) as private key, and its public key +(*b* where *b*=g^a*) is given to the sender. + +The ElGamal ciphertext is twice as big as *p*. + +Domain parameters +----------------- +For both signature and encryption schemes, the values *(p,g)* are called +*domain parameters*. +They are not sensitive but must be distributed to all parties (senders and +receivers). +Different signers can share the same domain parameters, as can +different recipients of encrypted messages. + +Security +-------- +Both DLP and CDH problem are believed to be difficult, and they have been proved +such (and therefore secure) for more than 30 years. + +The cryptographic strength is linked to the magnitude of *p*. +In 2012, a sufficient size for *p* is deemed to be 2048 bits. +For more information, see the most recent ECRYPT_ report. + +Even though ElGamal algorithms are in theory reasonably secure for new designs, +in practice there are no real good reasons for using them. +The signature is four times larger than the equivalent DSA, and the ciphertext +is two times larger than the equivalent RSA. + +Functionality +------------- +This module provides facilities for generating new ElGamal keys and for constructing +them from known components. ElGamal keys allows you to perform basic signing, +verification, encryption, and decryption. + + >>> from Crypto import Random + >>> from Crypto.Random import random + >>> from Crypto.PublicKey import ElGamal + >>> from Crypto.Util.number import GCD + >>> from Crypto.Hash import SHA + >>> + >>> message = "Hello" + >>> key = ElGamal.generate(1024, Random.new().read) + >>> h = SHA.new(message).digest() + >>> while 1: + >>> k = random.StrongRandom().randint(1,key.p-1) + >>> if GCD(k,key.p-1)==1: break + >>> sig = key.sign(h,k) + >>> ... + >>> if key.verify(h,sig): + >>> print "OK" + >>> else: + >>> print "Incorrect signature" + +.. _DLP: http://www.cosic.esat.kuleuven.be/publications/talk-78.pdf +.. _CDH: http://en.wikipedia.org/wiki/Computational_Diffie%E2%80%93Hellman_assumption +.. _ECRYPT: http://www.ecrypt.eu.org/documents/D.SPA.17.pdf +""" + +__revision__ = "$Id$" + +__all__ = ['generate', 'construct', 'error', 'ElGamalobj'] + +from Crypto.PublicKey.pubkey import * +from Crypto.Util import number + +class error (Exception): + pass + +# Generate an ElGamal key with N bits +def generate(bits, randfunc, progress_func=None): + """Randomly generate a fresh, new ElGamal key. + + The key will be safe for use for both encryption and signature + (although it should be used for **only one** purpose). + + :Parameters: + bits : int + Key length, or size (in bits) of the modulus *p*. + Recommended value is 2048. + randfunc : callable + Random number generation function; it should accept + a single integer N and return a string of random data + N bytes long. + progress_func : callable + Optional function that will be called with a short string + containing the key parameter currently being generated; + it's useful for interactive applications where a user is + waiting for a key to be generated. + + :attention: You should always use a cryptographically secure random number generator, + such as the one defined in the ``Crypto.Random`` module; **don't** just use the + current time and the ``random`` module. + + :Return: An ElGamal key object (`ElGamalobj`). + """ + obj=ElGamalobj() + # Generate a safe prime p + # See Algorithm 4.86 in Handbook of Applied Cryptography + if progress_func: + progress_func('p\n') + while 1: + q = bignum(getPrime(bits-1, randfunc)) + obj.p = 2*q+1 + if number.isPrime(obj.p, randfunc=randfunc): + break + # Generate generator g + # See Algorithm 4.80 in Handbook of Applied Cryptography + # Note that the order of the group is n=p-1=2q, where q is prime + if progress_func: + progress_func('g\n') + while 1: + # We must avoid g=2 because of Bleichenbacher's attack described + # in "Generating ElGamal signatures without knowning the secret key", + # 1996 + # + obj.g = number.getRandomRange(3, obj.p, randfunc) + safe = 1 + if pow(obj.g, 2, obj.p)==1: + safe=0 + if safe and pow(obj.g, q, obj.p)==1: + safe=0 + # Discard g if it divides p-1 because of the attack described + # in Note 11.67 (iii) in HAC + if safe and divmod(obj.p-1, obj.g)[1]==0: + safe=0 + # g^{-1} must not divide p-1 because of Khadir's attack + # described in "Conditions of the generator for forging ElGamal + # signature", 2011 + ginv = number.inverse(obj.g, obj.p) + if safe and divmod(obj.p-1, ginv)[1]==0: + safe=0 + if safe: + break + # Generate private key x + if progress_func: + progress_func('x\n') + obj.x=number.getRandomRange(2, obj.p-1, randfunc) + # Generate public key y + if progress_func: + progress_func('y\n') + obj.y = pow(obj.g, obj.x, obj.p) + return obj + +def construct(tup): + """Construct an ElGamal key from a tuple of valid ElGamal components. + + The modulus *p* must be a prime. + + The following conditions must apply: + + - 1 < g < p-1 + - g^{p-1} = 1 mod p + - 1 < x < p-1 + - g^x = y mod p + + :Parameters: + tup : tuple + A tuple of long integers, with 3 or 4 items + in the following order: + + 1. Modulus (*p*). + 2. Generator (*g*). + 3. Public key (*y*). + 4. Private key (*x*). Optional. + + :Return: An ElGamal key object (`ElGamalobj`). + """ + + obj=ElGamalobj() + if len(tup) not in [3,4]: + raise ValueError('argument for construct() wrong length') + for i in range(len(tup)): + field = obj.keydata[i] + setattr(obj, field, tup[i]) + return obj + +class ElGamalobj(pubkey): + """Class defining an ElGamal key. + + :undocumented: __getstate__, __setstate__, __repr__, __getattr__ + """ + + #: Dictionary of ElGamal parameters. + #: + #: A public key will only have the following entries: + #: + #: - **y**, the public key. + #: - **g**, the generator. + #: - **p**, the modulus. + #: + #: A private key will also have: + #: + #: - **x**, the private key. + keydata=['p', 'g', 'y', 'x'] + + def encrypt(self, plaintext, K): + """Encrypt a piece of data with ElGamal. + + :Parameter plaintext: The piece of data to encrypt with ElGamal. + It must be numerically smaller than the module (*p*). + :Type plaintext: byte string or long + + :Parameter K: A secret number, chosen randomly in the closed + range *[1,p-2]*. + :Type K: long (recommended) or byte string (not recommended) + + :Return: A tuple with two items. Each item is of the same type as the + plaintext (string or long). + + :attention: selection of *K* is crucial for security. Generating a + random number larger than *p-1* and taking the modulus by *p-1* is + **not** secure, since smaller values will occur more frequently. + Generating a random number systematically smaller than *p-1* + (e.g. *floor((p-1)/8)* random bytes) is also **not** secure. + In general, it shall not be possible for an attacker to know + the value of any bit of K. + + :attention: The number *K* shall not be reused for any other + operation and shall be discarded immediately. + """ + return pubkey.encrypt(self, plaintext, K) + + def decrypt(self, ciphertext): + """Decrypt a piece of data with ElGamal. + + :Parameter ciphertext: The piece of data to decrypt with ElGamal. + :Type ciphertext: byte string, long or a 2-item tuple as returned + by `encrypt` + + :Return: A byte string if ciphertext was a byte string or a tuple + of byte strings. A long otherwise. + """ + return pubkey.decrypt(self, ciphertext) + + def sign(self, M, K): + """Sign a piece of data with ElGamal. + + :Parameter M: The piece of data to sign with ElGamal. It may + not be longer in bit size than *p-1*. + :Type M: byte string or long + + :Parameter K: A secret number, chosen randomly in the closed + range *[1,p-2]* and such that *gcd(k,p-1)=1*. + :Type K: long (recommended) or byte string (not recommended) + + :attention: selection of *K* is crucial for security. Generating a + random number larger than *p-1* and taking the modulus by *p-1* is + **not** secure, since smaller values will occur more frequently. + Generating a random number systematically smaller than *p-1* + (e.g. *floor((p-1)/8)* random bytes) is also **not** secure. + In general, it shall not be possible for an attacker to know + the value of any bit of K. + + :attention: The number *K* shall not be reused for any other + operation and shall be discarded immediately. + + :attention: M must be be a cryptographic hash, otherwise an + attacker may mount an existential forgery attack. + + :Return: A tuple with 2 longs. + """ + return pubkey.sign(self, M, K) + + def verify(self, M, signature): + """Verify the validity of an ElGamal signature. + + :Parameter M: The expected message. + :Type M: byte string or long + + :Parameter signature: The ElGamal signature to verify. + :Type signature: A tuple with 2 longs as return by `sign` + + :Return: True if the signature is correct, False otherwise. + """ + return pubkey.verify(self, M, signature) + + def _encrypt(self, M, K): + a=pow(self.g, K, self.p) + b=( M*pow(self.y, K, self.p) ) % self.p + return ( a,b ) + + def _decrypt(self, M): + if (not hasattr(self, 'x')): + raise TypeError('Private key not available in this object') + ax=pow(M[0], self.x, self.p) + plaintext=(M[1] * inverse(ax, self.p ) ) % self.p + return plaintext + + def _sign(self, M, K): + if (not hasattr(self, 'x')): + raise TypeError('Private key not available in this object') + p1=self.p-1 + if (GCD(K, p1)!=1): + raise ValueError('Bad K value: GCD(K,p-1)!=1') + a=pow(self.g, K, self.p) + t=(M-self.x*a) % p1 + while t<0: t=t+p1 + b=(t*inverse(K, p1)) % p1 + return (a, b) + + def _verify(self, M, sig): + if sig[0]<1 or sig[0]>self.p-1: + return 0 + v1=pow(self.y, sig[0], self.p) + v1=(v1*pow(sig[0], sig[1], self.p)) % self.p + v2=pow(self.g, M, self.p) + if v1==v2: + return 1 + return 0 + + def size(self): + return number.size(self.p) - 1 + + def has_private(self): + if hasattr(self, 'x'): + return 1 + else: + return 0 + + def publickey(self): + return construct((self.p, self.g, self.y)) + + +object=ElGamalobj diff --git a/frozen_deps/Crypto/PublicKey/RSA.py b/frozen_deps/Crypto/PublicKey/RSA.py new file mode 100644 index 0000000..debe39e --- /dev/null +++ b/frozen_deps/Crypto/PublicKey/RSA.py @@ -0,0 +1,719 @@ +# -*- coding: utf-8 -*- +# +# PublicKey/RSA.py : RSA public key primitive +# +# Written in 2008 by Dwayne C. Litzenberger <[email protected]> +# +# =================================================================== +# The contents of this file are dedicated to the public domain. To +# the extent that dedication to the public domain is not available, +# everyone is granted a worldwide, perpetual, royalty-free, +# non-exclusive license to exercise all rights associated with the +# contents of this file for any purpose whatsoever. +# No rights are reserved. +# +# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, +# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND +# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS +# BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN +# ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN +# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +# SOFTWARE. +# =================================================================== + +"""RSA public-key cryptography algorithm (signature and encryption). + +RSA_ is the most widespread and used public key algorithm. Its security is +based on the difficulty of factoring large integers. The algorithm has +withstood attacks for 30 years, and it is therefore considered reasonably +secure for new designs. + +The algorithm can be used for both confidentiality (encryption) and +authentication (digital signature). It is worth noting that signing and +decryption are significantly slower than verification and encryption. +The cryptograhic strength is primarily linked to the length of the modulus *n*. +In 2012, a sufficient length is deemed to be 2048 bits. For more information, +see the most recent ECRYPT_ report. + +Both RSA ciphertext and RSA signature are as big as the modulus *n* (256 +bytes if *n* is 2048 bit long). + +This module provides facilities for generating fresh, new RSA keys, constructing +them from known components, exporting them, and importing them. + + >>> from Crypto.PublicKey import RSA + >>> + >>> key = RSA.generate(2048) + >>> f = open('mykey.pem','w') + >>> f.write(RSA.exportKey('PEM')) + >>> f.close() + ... + >>> f = open('mykey.pem','r') + >>> key = RSA.importKey(f.read()) + +Even though you may choose to directly use the methods of an RSA key object +to perform the primitive cryptographic operations (e.g. `_RSAobj.encrypt`), +it is recommended to use one of the standardized schemes instead (like +`Crypto.Cipher.PKCS1_v1_5` or `Crypto.Signature.PKCS1_v1_5`). + +.. _RSA: http://en.wikipedia.org/wiki/RSA_%28algorithm%29 +.. _ECRYPT: http://www.ecrypt.eu.org/documents/D.SPA.17.pdf + +:sort: generate,construct,importKey,error +""" + +__revision__ = "$Id$" + +__all__ = ['generate', 'construct', 'error', 'importKey', 'RSAImplementation', '_RSAobj'] + +import sys +if sys.version_info[0] == 2 and sys.version_info[1] == 1: + from Crypto.Util.py21compat import * +from Crypto.Util.py3compat import * +#from Crypto.Util.python_compat import * +from Crypto.Util.number import getRandomRange, bytes_to_long, long_to_bytes + +from Crypto.PublicKey import _RSA, _slowmath, pubkey +from Crypto import Random + +from Crypto.Util.asn1 import DerObject, DerSequence, DerNull +import binascii +import struct + +from Crypto.Util.number import inverse + +from Crypto.Util.number import inverse + +try: + from Crypto.PublicKey import _fastmath +except ImportError: + _fastmath = None + +class _RSAobj(pubkey.pubkey): + """Class defining an actual RSA key. + + :undocumented: __getstate__, __setstate__, __repr__, __getattr__ + """ + #: Dictionary of RSA parameters. + #: + #: A public key will only have the following entries: + #: + #: - **n**, the modulus. + #: - **e**, the public exponent. + #: + #: A private key will also have: + #: + #: - **d**, the private exponent. + #: - **p**, the first factor of n. + #: - **q**, the second factor of n. + #: - **u**, the CRT coefficient (1/p) mod q. + keydata = ['n', 'e', 'd', 'p', 'q', 'u'] + + def __init__(self, implementation, key, randfunc=None): + self.implementation = implementation + self.key = key + if randfunc is None: + randfunc = Random.new().read + self._randfunc = randfunc + + def __getattr__(self, attrname): + if attrname in self.keydata: + # For backward compatibility, allow the user to get (not set) the + # RSA key parameters directly from this object. + return getattr(self.key, attrname) + else: + raise AttributeError("%s object has no %r attribute" % (self.__class__.__name__, attrname,)) + + def encrypt(self, plaintext, K): + """Encrypt a piece of data with RSA. + + :Parameter plaintext: The piece of data to encrypt with RSA. It may not + be numerically larger than the RSA module (**n**). + :Type plaintext: byte string or long + + :Parameter K: A random parameter (*for compatibility only. This + value will be ignored*) + :Type K: byte string or long + + :attention: this function performs the plain, primitive RSA encryption + (*textbook*). In real applications, you always need to use proper + cryptographic padding, and you should not directly encrypt data with + this method. Failure to do so may lead to security vulnerabilities. + It is recommended to use modules + `Crypto.Cipher.PKCS1_OAEP` or `Crypto.Cipher.PKCS1_v1_5` instead. + + :Return: A tuple with two items. The first item is the ciphertext + of the same type as the plaintext (string or long). The second item + is always None. + """ + return pubkey.pubkey.encrypt(self, plaintext, K) + + def decrypt(self, ciphertext): + """Decrypt a piece of data with RSA. + + Decryption always takes place with blinding. + + :attention: this function performs the plain, primitive RSA decryption + (*textbook*). In real applications, you always need to use proper + cryptographic padding, and you should not directly decrypt data with + this method. Failure to do so may lead to security vulnerabilities. + It is recommended to use modules + `Crypto.Cipher.PKCS1_OAEP` or `Crypto.Cipher.PKCS1_v1_5` instead. + + :Parameter ciphertext: The piece of data to decrypt with RSA. It may + not be numerically larger than the RSA module (**n**). If a tuple, + the first item is the actual ciphertext; the second item is ignored. + + :Type ciphertext: byte string, long or a 2-item tuple as returned by + `encrypt` + + :Return: A byte string if ciphertext was a byte string or a tuple + of byte strings. A long otherwise. + """ + return pubkey.pubkey.decrypt(self, ciphertext) + + def sign(self, M, K): + """Sign a piece of data with RSA. + + Signing always takes place with blinding. + + :attention: this function performs the plain, primitive RSA decryption + (*textbook*). In real applications, you always need to use proper + cryptographic padding, and you should not directly sign data with + this method. Failure to do so may lead to security vulnerabilities. + It is recommended to use modules + `Crypto.Signature.PKCS1_PSS` or `Crypto.Signature.PKCS1_v1_5` instead. + + :Parameter M: The piece of data to sign with RSA. It may + not be numerically larger than the RSA module (**n**). + :Type M: byte string or long + + :Parameter K: A random parameter (*for compatibility only. This + value will be ignored*) + :Type K: byte string or long + + :Return: A 2-item tuple. The first item is the actual signature (a + long). The second item is always None. + """ + return pubkey.pubkey.sign(self, M, K) + + def verify(self, M, signature): + """Verify the validity of an RSA signature. + + :attention: this function performs the plain, primitive RSA encryption + (*textbook*). In real applications, you always need to use proper + cryptographic padding, and you should not directly verify data with + this method. Failure to do so may lead to security vulnerabilities. + It is recommended to use modules + `Crypto.Signature.PKCS1_PSS` or `Crypto.Signature.PKCS1_v1_5` instead. + + :Parameter M: The expected message. + :Type M: byte string or long + + :Parameter signature: The RSA signature to verify. The first item of + the tuple is the actual signature (a long not larger than the modulus + **n**), whereas the second item is always ignored. + :Type signature: A 2-item tuple as return by `sign` + + :Return: True if the signature is correct, False otherwise. + """ + return pubkey.pubkey.verify(self, M, signature) + + def _encrypt(self, c, K): + return (self.key._encrypt(c),) + + def _decrypt(self, c): + #(ciphertext,) = c + (ciphertext,) = c[:1] # HACK - We should use the previous line + # instead, but this is more compatible and we're + # going to replace the Crypto.PublicKey API soon + # anyway. + + # Blinded RSA decryption (to prevent timing attacks): + # Step 1: Generate random secret blinding factor r, such that 0 < r < n-1 + r = getRandomRange(1, self.key.n-1, randfunc=self._randfunc) + # Step 2: Compute c' = c * r**e mod n + cp = self.key._blind(ciphertext, r) + # Step 3: Compute m' = c'**d mod n (ordinary RSA decryption) + mp = self.key._decrypt(cp) + # Step 4: Compute m = m**(r-1) mod n + return self.key._unblind(mp, r) + + def _blind(self, m, r): + return self.key._blind(m, r) + + def _unblind(self, m, r): + return self.key._unblind(m, r) + + def _sign(self, m, K=None): + return (self.key._sign(m),) + + def _verify(self, m, sig): + #(s,) = sig + (s,) = sig[:1] # HACK - We should use the previous line instead, but + # this is more compatible and we're going to replace + # the Crypto.PublicKey API soon anyway. + return self.key._verify(m, s) + + def has_private(self): + return self.key.has_private() + + def size(self): + return self.key.size() + + def can_blind(self): + return True + + def can_encrypt(self): + return True + + def can_sign(self): + return True + + def publickey(self): + return self.implementation.construct((self.key.n, self.key.e)) + + def __getstate__(self): + d = {} + for k in self.keydata: + try: + d[k] = getattr(self.key, k) + except AttributeError: + pass + return d + + def __setstate__(self, d): + if not hasattr(self, 'implementation'): + self.implementation = RSAImplementation() + t = [] + for k in self.keydata: + if k not in d: + break + t.append(d[k]) + self.key = self.implementation._math.rsa_construct(*tuple(t)) + + def __repr__(self): + attrs = [] + for k in self.keydata: + if k == 'n': + attrs.append("n(%d)" % (self.size()+1,)) + elif hasattr(self.key, k): + attrs.append(k) + if self.has_private(): + attrs.append("private") + # PY3K: This is meant to be text, do not change to bytes (data) + return "<%s @0x%x %s>" % (self.__class__.__name__, id(self), ",".join(attrs)) + + def exportKey(self, format='PEM', passphrase=None, pkcs=1): + """Export this RSA key. + + :Parameter format: The format to use for wrapping the key. + + - *'DER'*. Binary encoding, always unencrypted. + - *'PEM'*. Textual encoding, done according to `RFC1421`_/`RFC1423`_. + Unencrypted (default) or encrypted. + - *'OpenSSH'*. Textual encoding, done according to OpenSSH specification. + Only suitable for public keys (not private keys). + :Type format: string + + :Parameter passphrase: In case of PEM, the pass phrase to derive the encryption key from. + :Type passphrase: string + + :Parameter pkcs: The PKCS standard to follow for assembling the key. + You have two choices: + + - with **1**, the public key is embedded into an X.509 `SubjectPublicKeyInfo` DER SEQUENCE. + The private key is embedded into a `PKCS#1`_ `RSAPrivateKey` DER SEQUENCE. + This mode is the default. + - with **8**, the private key is embedded into a `PKCS#8`_ `PrivateKeyInfo` DER SEQUENCE. + This mode is not available for public keys. + + PKCS standards are not relevant for the *OpenSSH* format. + :Type pkcs: integer + + :Return: A byte string with the encoded public or private half. + :Raise ValueError: + When the format is unknown. + + .. _RFC1421: http://www.ietf.org/rfc/rfc1421.txt + .. _RFC1423: http://www.ietf.org/rfc/rfc1423.txt + .. _`PKCS#1`: http://www.ietf.org/rfc/rfc3447.txt + .. _`PKCS#8`: http://www.ietf.org/rfc/rfc5208.txt + """ + if passphrase is not None: + passphrase = tobytes(passphrase) + if format=='OpenSSH': + eb = long_to_bytes(self.e) + nb = long_to_bytes(self.n) + if bord(eb[0]) & 0x80: eb=bchr(0x00)+eb + if bord(nb[0]) & 0x80: nb=bchr(0x00)+nb + keyparts = [ 'ssh-rsa', eb, nb ] + keystring = ''.join([ struct.pack(">I",len(kp))+kp for kp in keyparts]) + return 'ssh-rsa '+binascii.b2a_base64(keystring)[:-1] + + # DER format is always used, even in case of PEM, which simply + # encodes it into BASE64. + der = DerSequence() + if self.has_private(): + keyType= { 1: 'RSA PRIVATE', 8: 'PRIVATE' }[pkcs] + der[:] = [ 0, self.n, self.e, self.d, self.p, self.q, + self.d % (self.p-1), self.d % (self.q-1), + inverse(self.q, self.p) ] + if pkcs==8: + derkey = der.encode() + der = DerSequence([0]) + der.append(algorithmIdentifier) + der.append(DerObject('OCTET STRING', derkey).encode()) + else: + keyType = "PUBLIC" + der.append(algorithmIdentifier) + bitmap = DerObject('BIT STRING') + derPK = DerSequence( [ self.n, self.e ] ) + bitmap.payload = bchr(0x00) + derPK.encode() + der.append(bitmap.encode()) + if format=='DER': + return der.encode() + if format=='PEM': + pem = b("-----BEGIN " + keyType + " KEY-----\n") + objenc = None + if passphrase and keyType.endswith('PRIVATE'): + # We only support 3DES for encryption + import Crypto.Hash.MD5 + from Crypto.Cipher import DES3 + from Crypto.Protocol.KDF import PBKDF1 + salt = self._randfunc(8) + key = PBKDF1(passphrase, salt, 16, 1, Crypto.Hash.MD5) + key += PBKDF1(key+passphrase, salt, 8, 1, Crypto.Hash.MD5) + objenc = DES3.new(key, Crypto.Cipher.DES3.MODE_CBC, salt) + pem += b('Proc-Type: 4,ENCRYPTED\n') + pem += b('DEK-Info: DES-EDE3-CBC,') + binascii.b2a_hex(salt).upper() + b('\n\n') + + binaryKey = der.encode() + if objenc: + # Add PKCS#7-like padding + padding = objenc.block_size-len(binaryKey)%objenc.block_size + binaryKey = objenc.encrypt(binaryKey+bchr(padding)*padding) + + # Each BASE64 line can take up to 64 characters (=48 bytes of data) + chunks = [ binascii.b2a_base64(binaryKey[i:i+48]) for i in range(0, len(binaryKey), 48) ] + pem += b('').join(chunks) + pem += b("-----END " + keyType + " KEY-----") + return pem + return ValueError("Unknown key format '%s'. Cannot export the RSA key." % format) + +class RSAImplementation(object): + """ + An RSA key factory. + + This class is only internally used to implement the methods of the `Crypto.PublicKey.RSA` module. + + :sort: __init__,generate,construct,importKey + :undocumented: _g*, _i* + """ + + def __init__(self, **kwargs): + """Create a new RSA key factory. + + :Keywords: + use_fast_math : bool + Specify which mathematic library to use: + + - *None* (default). Use fastest math available. + - *True* . Use fast math. + - *False* . Use slow math. + default_randfunc : callable + Specify how to collect random data: + + - *None* (default). Use Random.new().read(). + - not *None* . Use the specified function directly. + :Raise RuntimeError: + When **use_fast_math** =True but fast math is not available. + """ + use_fast_math = kwargs.get('use_fast_math', None) + if use_fast_math is None: # Automatic + if _fastmath is not None: + self._math = _fastmath + else: + self._math = _slowmath + + elif use_fast_math: # Explicitly select fast math + if _fastmath is not None: + self._math = _fastmath + else: + raise RuntimeError("fast math module not available") + + else: # Explicitly select slow math + self._math = _slowmath + + self.error = self._math.error + + self._default_randfunc = kwargs.get('default_randfunc', None) + self._current_randfunc = None + + def _get_randfunc(self, randfunc): + if randfunc is not None: + return randfunc + elif self._current_randfunc is None: + self._current_randfunc = Random.new().read + return self._current_randfunc + + def generate(self, bits, randfunc=None, progress_func=None, e=65537): + """Randomly generate a fresh, new RSA key. + + :Parameters: + bits : int + Key length, or size (in bits) of the RSA modulus. + It must be a multiple of 256, and no smaller than 1024. + + randfunc : callable + Random number generation function; it should accept + a single integer N and return a string of random data + N bytes long. + If not specified, a new one will be instantiated + from ``Crypto.Random``. + + progress_func : callable + Optional function that will be called with a short string + containing the key parameter currently being generated; + it's useful for interactive applications where a user is + waiting for a key to be generated. + + e : int + Public RSA exponent. It must be an odd positive integer. + It is typically a small number with very few ones in its + binary representation. + The default value 65537 (= ``0b10000000000000001`` ) is a safe + choice: other common values are 5, 7, 17, and 257. + + :attention: You should always use a cryptographically secure random number generator, + such as the one defined in the ``Crypto.Random`` module; **don't** just use the + current time and the ``random`` module. + + :attention: Exponent 3 is also widely used, but it requires very special care when padding + the message. + + :Return: An RSA key object (`_RSAobj`). + + :Raise ValueError: + When **bits** is too little or not a multiple of 256, or when + **e** is not odd or smaller than 2. + """ + if bits < 1024 or (bits & 0xff) != 0: + # pubkey.getStrongPrime doesn't like anything that's not a multiple of 256 and >= 1024 + raise ValueError("RSA modulus length must be a multiple of 256 and >= 1024") + if e%2==0 or e<3: + raise ValueError("RSA public exponent must be a positive, odd integer larger than 2.") + rf = self._get_randfunc(randfunc) + obj = _RSA.generate_py(bits, rf, progress_func, e) # TODO: Don't use legacy _RSA module + key = self._math.rsa_construct(obj.n, obj.e, obj.d, obj.p, obj.q, obj.u) + return _RSAobj(self, key) + + def construct(self, tup): + """Construct an RSA key from a tuple of valid RSA components. + + The modulus **n** must be the product of two primes. + The public exponent **e** must be odd and larger than 1. + + In case of a private key, the following equations must apply: + + - e != 1 + - p*q = n + - e*d = 1 mod (p-1)(q-1) + - p*u = 1 mod q + + :Parameters: + tup : tuple + A tuple of long integers, with at least 2 and no + more than 6 items. The items come in the following order: + + 1. RSA modulus (n). + 2. Public exponent (e). + 3. Private exponent (d). Only required if the key is private. + 4. First factor of n (p). Optional. + 5. Second factor of n (q). Optional. + 6. CRT coefficient, (1/p) mod q (u). Optional. + + :Return: An RSA key object (`_RSAobj`). + """ + key = self._math.rsa_construct(*tup) + return _RSAobj(self, key) + + def _importKeyDER(self, externKey): + """Import an RSA key (public or private half), encoded in DER form.""" + + try: + + der = DerSequence() + der.decode(externKey, True) + + # Try PKCS#1 first, for a private key + if len(der)==9 and der.hasOnlyInts() and der[0]==0: + # ASN.1 RSAPrivateKey element + del der[6:] # Remove d mod (p-1), d mod (q-1), and q^{-1} mod p + der.append(inverse(der[4],der[5])) # Add p^{-1} mod q + del der[0] # Remove version + return self.construct(der[:]) + + # Keep on trying PKCS#1, but now for a public key + if len(der)==2: + # The DER object is an RSAPublicKey SEQUENCE with two elements + if der.hasOnlyInts(): + return self.construct(der[:]) + # The DER object is a SubjectPublicKeyInfo SEQUENCE with two elements: + # an 'algorithm' (or 'algorithmIdentifier') SEQUENCE and a 'subjectPublicKey' BIT STRING. + # 'algorithm' takes the value given a few lines above. + # 'subjectPublicKey' encapsulates the actual ASN.1 RSAPublicKey element. + if der[0]==algorithmIdentifier: + bitmap = DerObject() + bitmap.decode(der[1], True) + if bitmap.isType('BIT STRING') and bord(bitmap.payload[0])==0x00: + der.decode(bitmap.payload[1:], True) + if len(der)==2 and der.hasOnlyInts(): + return self.construct(der[:]) + + # Try unencrypted PKCS#8 + if der[0]==0: + # The second element in the SEQUENCE is algorithmIdentifier. + # It must say RSA (see above for description). + if der[1]==algorithmIdentifier: + privateKey = DerObject() + privateKey.decode(der[2], True) + if privateKey.isType('OCTET STRING'): + return self._importKeyDER(privateKey.payload) + + except ValueError as IndexError: + pass + + raise ValueError("RSA key format is not supported") + + def importKey(self, externKey, passphrase=None): + """Import an RSA key (public or private half), encoded in standard form. + + :Parameter externKey: + The RSA key to import, encoded as a string. + + An RSA public key can be in any of the following formats: + + - X.509 `subjectPublicKeyInfo` DER SEQUENCE (binary or PEM encoding) + - `PKCS#1`_ `RSAPublicKey` DER SEQUENCE (binary or PEM encoding) + - OpenSSH (textual public key only) + + An RSA private key can be in any of the following formats: + + - PKCS#1 `RSAPrivateKey` DER SEQUENCE (binary or PEM encoding) + - `PKCS#8`_ `PrivateKeyInfo` DER SEQUENCE (binary or PEM encoding) + - OpenSSH (textual public key only) + + For details about the PEM encoding, see `RFC1421`_/`RFC1423`_. + + In case of PEM encoding, the private key can be encrypted with DES or 3TDES according to a certain ``pass phrase``. + Only OpenSSL-compatible pass phrases are supported. + :Type externKey: string + + :Parameter passphrase: + In case of an encrypted PEM key, this is the pass phrase from which the encryption key is derived. + :Type passphrase: string + + :Return: An RSA key object (`_RSAobj`). + + :Raise ValueError/IndexError/TypeError: + When the given key cannot be parsed (possibly because the pass phrase is wrong). + + .. _RFC1421: http://www.ietf.org/rfc/rfc1421.txt + .. _RFC1423: http://www.ietf.org/rfc/rfc1423.txt + .. _`PKCS#1`: http://www.ietf.org/rfc/rfc3447.txt + .. _`PKCS#8`: http://www.ietf.org/rfc/rfc5208.txt + """ + externKey = tobytes(externKey) + if passphrase is not None: + passphrase = tobytes(passphrase) + + if externKey.startswith(b('-----')): + # This is probably a PEM encoded key + lines = externKey.replace(b(" "),b('')).split() + keyobj = None + + # The encrypted PEM format + if lines[1].startswith(b('Proc-Type:4,ENCRYPTED')): + DEK = lines[2].split(b(':')) + if len(DEK)!=2 or DEK[0]!=b('DEK-Info') or not passphrase: + raise ValueError("PEM encryption format not supported.") + algo, salt = DEK[1].split(b(',')) + salt = binascii.a2b_hex(salt) + import Crypto.Hash.MD5 + from Crypto.Cipher import DES, DES3 + from Crypto.Protocol.KDF import PBKDF1 + if algo==b("DES-CBC"): + # This is EVP_BytesToKey in OpenSSL + key = PBKDF1(passphrase, salt, 8, 1, Crypto.Hash.MD5) + keyobj = DES.new(key, Crypto.Cipher.DES.MODE_CBC, salt) + elif algo==b("DES-EDE3-CBC"): + # Note that EVP_BytesToKey is note exactly the same as PBKDF1 + key = PBKDF1(passphrase, salt, 16, 1, Crypto.Hash.MD5) + key += PBKDF1(key+passphrase, salt, 8, 1, Crypto.Hash.MD5) + keyobj = DES3.new(key, Crypto.Cipher.DES3.MODE_CBC, salt) + else: + raise ValueError("Unsupport PEM encryption algorithm.") + lines = lines[2:] + + der = binascii.a2b_base64(b('').join(lines[1:-1])) + if keyobj: + der = keyobj.decrypt(der) + padding = bord(der[-1]) + der = der[:-padding] + return self._importKeyDER(der) + + if externKey.startswith(b('ssh-rsa ')): + # This is probably an OpenSSH key + keystring = binascii.a2b_base64(externKey.split(b(' '))[1]) + keyparts = [] + while len(keystring)>4: + l = struct.unpack(">I",keystring[:4])[0] + keyparts.append(keystring[4:4+l]) + keystring = keystring[4+l:] + e = bytes_to_long(keyparts[1]) + n = bytes_to_long(keyparts[2]) + return self.construct([n, e]) + if bord(externKey[0])==0x30: + # This is probably a DER encoded key + return self._importKeyDER(externKey) + + raise ValueError("RSA key format is not supported") + +#: This is the ASN.1 DER object that qualifies an algorithm as +#: compliant to PKCS#1 (that is, the standard RSA). +# It is found in all 'algorithm' fields (also called 'algorithmIdentifier'). +# It is a SEQUENCE with the oid assigned to RSA and with its parameters (none). +# 0x06 0x09 OBJECT IDENTIFIER, 9 bytes of payload +# 0x2A 0x86 0x48 0x86 0xF7 0x0D 0x01 0x01 0x01 +# rsaEncryption (1 2 840 113549 1 1 1) (PKCS #1) +# 0x05 0x00 NULL +algorithmIdentifier = DerSequence( + [ b('\x06\x09\x2A\x86\x48\x86\xF7\x0D\x01\x01\x01'), + DerNull().encode() ] + ).encode() + +_impl = RSAImplementation() +#: +#: Randomly generate a fresh, new RSA key object. +#: +#: See `RSAImplementation.generate`. +#: +generate = _impl.generate +#: +#: Construct an RSA key object from a tuple of valid RSA components. +#: +#: See `RSAImplementation.construct`. +#: +construct = _impl.construct +#: +#: Import an RSA key (public or private half), encoded in standard form. +#: +#: See `RSAImplementation.importKey`. +#: +importKey = _impl.importKey +error = _impl.error + +# vim:set ts=4 sw=4 sts=4 expandtab: + diff --git a/frozen_deps/Crypto/PublicKey/_DSA.py b/frozen_deps/Crypto/PublicKey/_DSA.py new file mode 100644 index 0000000..1787ced --- /dev/null +++ b/frozen_deps/Crypto/PublicKey/_DSA.py @@ -0,0 +1,115 @@ + +# +# DSA.py : Digital Signature Algorithm +# +# Part of the Python Cryptography Toolkit +# +# Written by Andrew Kuchling, Paul Swartz, and others +# +# =================================================================== +# The contents of this file are dedicated to the public domain. To +# the extent that dedication to the public domain is not available, +# everyone is granted a worldwide, perpetual, royalty-free, +# non-exclusive license to exercise all rights associated with the +# contents of this file for any purpose whatsoever. +# No rights are reserved. +# +# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, +# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND +# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS +# BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN +# ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN +# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +# SOFTWARE. +# =================================================================== +# + +__revision__ = "$Id$" + +from Crypto.PublicKey.pubkey import * +from Crypto.Util import number +from Crypto.Util.number import bytes_to_long, long_to_bytes +from Crypto.Hash import SHA +from Crypto.Util.py3compat import * + +class error (Exception): + pass + +def generateQ(randfunc): + S=randfunc(20) + hash1=SHA.new(S).digest() + hash2=SHA.new(long_to_bytes(bytes_to_long(S)+1)).digest() + q = bignum(0) + for i in range(0,20): + c=bord(hash1[i])^bord(hash2[i]) + if i==0: + c=c | 128 + if i==19: + c= c | 1 + q=q*256+c + while (not isPrime(q)): + q=q+2 + if pow(2,159) < q < pow(2,160): + return S, q + raise RuntimeError('Bad q value generated') + +def generate_py(bits, randfunc, progress_func=None): + """generate(bits:int, randfunc:callable, progress_func:callable) + + Generate a DSA key of length 'bits', using 'randfunc' to get + random data and 'progress_func', if present, to display + the progress of the key generation. + """ + + if bits<160: + raise ValueError('Key length < 160 bits') + obj=DSAobj() + # Generate string S and prime q + if progress_func: + progress_func('p,q\n') + while (1): + S, obj.q = generateQ(randfunc) + n=divmod(bits-1, 160)[0] + C, N, V = 0, 2, {} + b=(obj.q >> 5) & 15 + powb=pow(bignum(2), b) + powL1=pow(bignum(2), bits-1) + while C<4096: + for k in range(0, n+1): + V[k]=bytes_to_long(SHA.new(S+bstr(N)+bstr(k)).digest()) + W=V[n] % powb + for k in range(n-1, -1, -1): + W=(W<<160)+V[k] + X=W+powL1 + p=X-(X%(2*obj.q)-1) + if powL1<=p and isPrime(p): + break + C, N = C+1, N+n+1 + if C<4096: + break + if progress_func: + progress_func('4096 multiples failed\n') + + obj.p = p + power=divmod(p-1, obj.q)[0] + if progress_func: + progress_func('h,g\n') + while (1): + h=bytes_to_long(randfunc(bits)) % (p-1) + g=pow(h, power, p) + if 1<h<p-1 and g>1: + break + obj.g=g + if progress_func: + progress_func('x,y\n') + while (1): + x=bytes_to_long(randfunc(20)) + if 0 < x < obj.q: + break + obj.x, obj.y = x, pow(g, x, p) + return obj + +class DSAobj: + pass + diff --git a/frozen_deps/Crypto/PublicKey/_RSA.py b/frozen_deps/Crypto/PublicKey/_RSA.py new file mode 100644 index 0000000..601ab7c --- /dev/null +++ b/frozen_deps/Crypto/PublicKey/_RSA.py @@ -0,0 +1,81 @@ +# +# RSA.py : RSA encryption/decryption +# +# Part of the Python Cryptography Toolkit +# +# Written by Andrew Kuchling, Paul Swartz, and others +# +# =================================================================== +# The contents of this file are dedicated to the public domain. To +# the extent that dedication to the public domain is not available, +# everyone is granted a worldwide, perpetual, royalty-free, +# non-exclusive license to exercise all rights associated with the +# contents of this file for any purpose whatsoever. +# No rights are reserved. +# +# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, +# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND +# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS +# BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN +# ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN +# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +# SOFTWARE. +# =================================================================== +# + +__revision__ = "$Id$" + +from Crypto.PublicKey import pubkey +from Crypto.Util import number + +def generate_py(bits, randfunc, progress_func=None, e=65537): + """generate(bits:int, randfunc:callable, progress_func:callable, e:int) + + Generate an RSA key of length 'bits', public exponent 'e'(which must be + odd), using 'randfunc' to get random data and 'progress_func', + if present, to display the progress of the key generation. + """ + obj=RSAobj() + obj.e = int(e) + + # Generate the prime factors of n + if progress_func: + progress_func('p,q\n') + p = q = 1 + while number.size(p*q) < bits: + # Note that q might be one bit longer than p if somebody specifies an odd + # number of bits for the key. (Why would anyone do that? You don't get + # more security.) + p = pubkey.getStrongPrime(bits>>1, obj.e, 1e-12, randfunc) + q = pubkey.getStrongPrime(bits - (bits>>1), obj.e, 1e-12, randfunc) + + # It's OK for p to be larger than q, but let's be + # kind to the function that will invert it for + # th calculation of u. + if p > q: + (p, q)=(q, p) + obj.p = p + obj.q = q + + if progress_func: + progress_func('u\n') + obj.u = pubkey.inverse(obj.p, obj.q) + obj.n = obj.p*obj.q + + if progress_func: + progress_func('d\n') + obj.d=pubkey.inverse(obj.e, (obj.p-1)*(obj.q-1)) + + assert bits <= 1+obj.size(), "Generated key is too small" + + return obj + +class RSAobj(pubkey.pubkey): + + def size(self): + """size() : int + Return the maximum number of bits that can be handled by this key. + """ + return number.size(self.n) - 1 + diff --git a/frozen_deps/Crypto/PublicKey/__init__.py b/frozen_deps/Crypto/PublicKey/__init__.py new file mode 100644 index 0000000..503809f --- /dev/null +++ b/frozen_deps/Crypto/PublicKey/__init__.py @@ -0,0 +1,41 @@ +# -*- coding: utf-8 -*- +# +# =================================================================== +# The contents of this file are dedicated to the public domain. To +# the extent that dedication to the public domain is not available, +# everyone is granted a worldwide, perpetual, royalty-free, +# non-exclusive license to exercise all rights associated with the +# contents of this file for any purpose whatsoever. +# No rights are reserved. +# +# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, +# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND +# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS +# BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN +# ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN +# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +# SOFTWARE. +# =================================================================== + +"""Public-key encryption and signature algorithms. + +Public-key encryption uses two different keys, one for encryption and +one for decryption. The encryption key can be made public, and the +decryption key is kept private. Many public-key algorithms can also +be used to sign messages, and some can *only* be used for signatures. + +======================== ============================================= +Module Description +======================== ============================================= +Crypto.PublicKey.DSA Digital Signature Algorithm (Signature only) +Crypto.PublicKey.ElGamal (Signing and encryption) +Crypto.PublicKey.RSA (Signing, encryption, and blinding) +======================== ============================================= + +:undocumented: _DSA, _RSA, _fastmath, _slowmath, pubkey +""" + +__all__ = ['RSA', 'DSA', 'ElGamal'] +__revision__ = "$Id$" + diff --git a/frozen_deps/Crypto/PublicKey/_fastmath.cpython-38-x86_64-linux-gnu.so b/frozen_deps/Crypto/PublicKey/_fastmath.cpython-38-x86_64-linux-gnu.so Binary files differnew file mode 100755 index 0000000..f0fe708 --- /dev/null +++ b/frozen_deps/Crypto/PublicKey/_fastmath.cpython-38-x86_64-linux-gnu.so diff --git a/frozen_deps/Crypto/PublicKey/_slowmath.py b/frozen_deps/Crypto/PublicKey/_slowmath.py new file mode 100644 index 0000000..c87bdd2 --- /dev/null +++ b/frozen_deps/Crypto/PublicKey/_slowmath.py @@ -0,0 +1,187 @@ +# -*- coding: utf-8 -*- +# +# PubKey/RSA/_slowmath.py : Pure Python implementation of the RSA portions of _fastmath +# +# Written in 2008 by Dwayne C. Litzenberger <[email protected]> +# +# =================================================================== +# The contents of this file are dedicated to the public domain. To +# the extent that dedication to the public domain is not available, +# everyone is granted a worldwide, perpetual, royalty-free, +# non-exclusive license to exercise all rights associated with the +# contents of this file for any purpose whatsoever. +# No rights are reserved. +# +# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, +# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND +# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS +# BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN +# ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN +# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +# SOFTWARE. +# =================================================================== + +"""Pure Python implementation of the RSA-related portions of Crypto.PublicKey._fastmath.""" + +__revision__ = "$Id$" + +__all__ = ['rsa_construct'] + +import sys + +if sys.version_info[0] == 2 and sys.version_info[1] == 1: + from Crypto.Util.py21compat import * +from Crypto.Util.number import size, inverse, GCD + +class error(Exception): + pass + +class _RSAKey(object): + def _blind(self, m, r): + # compute r**e * m (mod n) + return m * pow(r, self.e, self.n) + + def _unblind(self, m, r): + # compute m / r (mod n) + return inverse(r, self.n) * m % self.n + + def _decrypt(self, c): + # compute c**d (mod n) + if not self.has_private(): + raise TypeError("No private key") + if (hasattr(self,'p') and hasattr(self,'q') and hasattr(self,'u')): + m1 = pow(c, self.d % (self.p-1), self.p) + m2 = pow(c, self.d % (self.q-1), self.q) + h = m2 - m1 + if (h<0): + h = h + self.q + h = h*self.u % self.q + return h*self.p+m1 + return pow(c, self.d, self.n) + + def _encrypt(self, m): + # compute m**d (mod n) + return pow(m, self.e, self.n) + + def _sign(self, m): # alias for _decrypt + if not self.has_private(): + raise TypeError("No private key") + return self._decrypt(m) + + def _verify(self, m, sig): + return self._encrypt(sig) == m + + def has_private(self): + return hasattr(self, 'd') + + def size(self): + """Return the maximum number of bits that can be encrypted""" + return size(self.n) - 1 + +def rsa_construct(n, e, d=None, p=None, q=None, u=None): + """Construct an RSAKey object""" + assert isinstance(n, int) + assert isinstance(e, int) + assert isinstance(d, (int, type(None))) + assert isinstance(p, (int, type(None))) + assert isinstance(q, (int, type(None))) + assert isinstance(u, (int, type(None))) + obj = _RSAKey() + obj.n = n + obj.e = e + if d is None: + return obj + obj.d = d + if p is not None and q is not None: + obj.p = p + obj.q = q + else: + # Compute factors p and q from the private exponent d. + # We assume that n has no more than two factors. + # See 8.2.2(i) in Handbook of Applied Cryptography. + ktot = d*e-1 + # The quantity d*e-1 is a multiple of phi(n), even, + # and can be represented as t*2^s. + t = ktot + while t%2==0: + t=divmod(t,2)[0] + # Cycle through all multiplicative inverses in Zn. + # The algorithm is non-deterministic, but there is a 50% chance + # any candidate a leads to successful factoring. + # See "Digitalized Signatures and Public Key Functions as Intractable + # as Factorization", M. Rabin, 1979 + spotted = 0 + a = 2 + while not spotted and a<100: + k = t + # Cycle through all values a^{t*2^i}=a^k + while k<ktot: + cand = pow(a,k,n) + # Check if a^k is a non-trivial root of unity (mod n) + if cand!=1 and cand!=(n-1) and pow(cand,2,n)==1: + # We have found a number such that (cand-1)(cand+1)=0 (mod n). + # Either of the terms divides n. + obj.p = GCD(cand+1,n) + spotted = 1 + break + k = k*2 + # This value was not any good... let's try another! + a = a+2 + if not spotted: + raise ValueError("Unable to compute factors p and q from exponent d.") + # Found ! + assert ((n % obj.p)==0) + obj.q = divmod(n,obj.p)[0] + if u is not None: + obj.u = u + else: + obj.u = inverse(obj.p, obj.q) + return obj + +class _DSAKey(object): + def size(self): + """Return the maximum number of bits that can be encrypted""" + return size(self.p) - 1 + + def has_private(self): + return hasattr(self, 'x') + + def _sign(self, m, k): # alias for _decrypt + # SECURITY TODO - We _should_ be computing SHA1(m), but we don't because that's the API. + if not self.has_private(): + raise TypeError("No private key") + if not (1 < k < self.q): + raise ValueError("k is not between 2 and q-1") + inv_k = inverse(k, self.q) # Compute k**-1 mod q + r = pow(self.g, k, self.p) % self.q # r = (g**k mod p) mod q + s = (inv_k * (m + self.x * r)) % self.q + return (r, s) + + def _verify(self, m, r, s): + # SECURITY TODO - We _should_ be computing SHA1(m), but we don't because that's the API. + if not (0 < r < self.q) or not (0 < s < self.q): + return False + w = inverse(s, self.q) + u1 = (m*w) % self.q + u2 = (r*w) % self.q + v = (pow(self.g, u1, self.p) * pow(self.y, u2, self.p) % self.p) % self.q + return v == r + +def dsa_construct(y, g, p, q, x=None): + assert isinstance(y, int) + assert isinstance(g, int) + assert isinstance(p, int) + assert isinstance(q, int) + assert isinstance(x, (int, type(None))) + obj = _DSAKey() + obj.y = y + obj.g = g + obj.p = p + obj.q = q + if x is not None: obj.x = x + return obj + + +# vim:set ts=4 sw=4 sts=4 expandtab: + diff --git a/frozen_deps/Crypto/PublicKey/pubkey.py b/frozen_deps/Crypto/PublicKey/pubkey.py new file mode 100644 index 0000000..e46b076 --- /dev/null +++ b/frozen_deps/Crypto/PublicKey/pubkey.py @@ -0,0 +1,240 @@ +# +# pubkey.py : Internal functions for public key operations +# +# Part of the Python Cryptography Toolkit +# +# Written by Andrew Kuchling, Paul Swartz, and others +# +# =================================================================== +# The contents of this file are dedicated to the public domain. To +# the extent that dedication to the public domain is not available, +# everyone is granted a worldwide, perpetual, royalty-free, +# non-exclusive license to exercise all rights associated with the +# contents of this file for any purpose whatsoever. +# No rights are reserved. +# +# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, +# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND +# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS +# BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN +# ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN +# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +# SOFTWARE. +# =================================================================== +# + +__revision__ = "$Id$" + +import types, warnings +from Crypto.Util.number import * + +# Basic public key class +class pubkey: + """An abstract class for a public key object. + + :undocumented: __getstate__, __setstate__, __eq__, __ne__, validate + """ + def __init__(self): + pass + + def __getstate__(self): + """To keep key objects platform-independent, the key data is + converted to standard Python long integers before being + written out. It will then be reconverted as necessary on + restoration.""" + d=self.__dict__ + for key in self.keydata: + if key in d: d[key]=int(d[key]) + return d + + def __setstate__(self, d): + """On unpickling a key object, the key data is converted to the big +number representation being used, whether that is Python long +integers, MPZ objects, or whatever.""" + for key in self.keydata: + if key in d: self.__dict__[key]=bignum(d[key]) + + def encrypt(self, plaintext, K): + """Encrypt a piece of data. + + :Parameter plaintext: The piece of data to encrypt. + :Type plaintext: byte string or long + + :Parameter K: A random parameter required by some algorithms + :Type K: byte string or long + + :Return: A tuple with two items. Each item is of the same type as the + plaintext (string or long). + """ + wasString=0 + if isinstance(plaintext, bytes): + plaintext=bytes_to_long(plaintext) ; wasString=1 + if isinstance(K, bytes): + K=bytes_to_long(K) + ciphertext=self._encrypt(plaintext, K) + if wasString: return tuple(map(long_to_bytes, ciphertext)) + else: return ciphertext + + def decrypt(self, ciphertext): + """Decrypt a piece of data. + + :Parameter ciphertext: The piece of data to decrypt. + :Type ciphertext: byte string, long or a 2-item tuple as returned by `encrypt` + + :Return: A byte string if ciphertext was a byte string or a tuple + of byte strings. A long otherwise. + """ + wasString=0 + if not isinstance(ciphertext, tuple): + ciphertext=(ciphertext,) + if isinstance(ciphertext[0], bytes): + ciphertext=tuple(map(bytes_to_long, ciphertext)) ; wasString=1 + plaintext=self._decrypt(ciphertext) + if wasString: return long_to_bytes(plaintext) + else: return plaintext + + def sign(self, M, K): + """Sign a piece of data. + + :Parameter M: The piece of data to encrypt. + :Type M: byte string or long + + :Parameter K: A random parameter required by some algorithms + :Type K: byte string or long + + :Return: A tuple with two items. + """ + if (not self.has_private()): + raise TypeError('Private key not available in this object') + if isinstance(M, bytes): M=bytes_to_long(M) + if isinstance(K, bytes): K=bytes_to_long(K) + return self._sign(M, K) + + def verify (self, M, signature): + """Verify the validity of a signature. + + :Parameter M: The expected message. + :Type M: byte string or long + + :Parameter signature: The signature to verify. + :Type signature: tuple with two items, as return by `sign` + + :Return: True if the signature is correct, False otherwise. + """ + if isinstance(M, bytes): M=bytes_to_long(M) + return self._verify(M, signature) + + # alias to compensate for the old validate() name + def validate (self, M, signature): + warnings.warn("validate() method name is obsolete; use verify()", + DeprecationWarning) + + def blind(self, M, B): + """Blind a message to prevent certain side-channel attacks. + + :Parameter M: The message to blind. + :Type M: byte string or long + + :Parameter B: Blinding factor. + :Type B: byte string or long + + :Return: A byte string if M was so. A long otherwise. + """ + wasString=0 + if isinstance(M, bytes): + M=bytes_to_long(M) ; wasString=1 + if isinstance(B, bytes): B=bytes_to_long(B) + blindedmessage=self._blind(M, B) + if wasString: return long_to_bytes(blindedmessage) + else: return blindedmessage + + def unblind(self, M, B): + """Unblind a message after cryptographic processing. + + :Parameter M: The encoded message to unblind. + :Type M: byte string or long + + :Parameter B: Blinding factor. + :Type B: byte string or long + """ + wasString=0 + if isinstance(M, bytes): + M=bytes_to_long(M) ; wasString=1 + if isinstance(B, bytes): B=bytes_to_long(B) + unblindedmessage=self._unblind(M, B) + if wasString: return long_to_bytes(unblindedmessage) + else: return unblindedmessage + + + # The following methods will usually be left alone, except for + # signature-only algorithms. They both return Boolean values + # recording whether this key's algorithm can sign and encrypt. + def can_sign (self): + """Tell if the algorithm can deal with cryptographic signatures. + + This property concerns the *algorithm*, not the key itself. + It may happen that this particular key object hasn't got + the private information required to generate a signature. + + :Return: boolean + """ + return 1 + + def can_encrypt (self): + """Tell if the algorithm can deal with data encryption. + + This property concerns the *algorithm*, not the key itself. + It may happen that this particular key object hasn't got + the private information required to decrypt data. + + :Return: boolean + """ + return 1 + + def can_blind (self): + """Tell if the algorithm can deal with data blinding. + + This property concerns the *algorithm*, not the key itself. + It may happen that this particular key object hasn't got + the private information required carry out blinding. + + :Return: boolean + """ + return 0 + + # The following methods will certainly be overridden by + # subclasses. + + def size (self): + """Tell the maximum number of bits that can be handled by this key. + + :Return: int + """ + return 0 + + def has_private (self): + """Tell if the key object contains private components. + + :Return: bool + """ + return 0 + + def publickey (self): + """Construct a new key carrying only the public information. + + :Return: A new `pubkey` object. + """ + return self + + def __eq__ (self, other): + """__eq__(other): 0, 1 + Compare us to other for equality. + """ + return self.__getstate__() == other.__getstate__() + + def __ne__ (self, other): + """__ne__(other): 0, 1 + Compare us to other for inequality. + """ + return not self.__eq__(other) diff --git a/frozen_deps/Crypto/Random/Fortuna/FortunaAccumulator.py b/frozen_deps/Crypto/Random/Fortuna/FortunaAccumulator.py new file mode 100644 index 0000000..5c6beb0 --- /dev/null +++ b/frozen_deps/Crypto/Random/Fortuna/FortunaAccumulator.py @@ -0,0 +1,171 @@ +# -*- coding: ascii -*- +# +# FortunaAccumulator.py : Fortuna's internal accumulator +# +# Written in 2008 by Dwayne C. Litzenberger <[email protected]> +# +# =================================================================== +# The contents of this file are dedicated to the public domain. To +# the extent that dedication to the public domain is not available, +# everyone is granted a worldwide, perpetual, royalty-free, +# non-exclusive license to exercise all rights associated with the +# contents of this file for any purpose whatsoever. +# No rights are reserved. +# +# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, +# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND +# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS +# BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN +# ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN +# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +# SOFTWARE. +# =================================================================== + +__revision__ = "$Id$" + +import sys +if sys.version_info[0] == 2 and sys.version_info[1] == 1: + from Crypto.Util.py21compat import * +from Crypto.Util.py3compat import * + +from binascii import b2a_hex +import time +import warnings + +from Crypto.pct_warnings import ClockRewindWarning +from . import SHAd256 + +from . import FortunaGenerator + +class FortunaPool(object): + """Fortuna pool type + + This object acts like a hash object, with the following differences: + + - It keeps a count (the .length attribute) of the number of bytes that + have been added to the pool + - It supports a .reset() method for in-place reinitialization + - The method to add bytes to the pool is .append(), not .update(). + """ + + digest_size = SHAd256.digest_size + + def __init__(self): + self.reset() + + def append(self, data): + self._h.update(data) + self.length += len(data) + + def digest(self): + return self._h.digest() + + def hexdigest(self): + if sys.version_info[0] == 2: + return b2a_hex(self.digest()) + else: + return b2a_hex(self.digest()).decode() + + def reset(self): + self._h = SHAd256.new() + self.length = 0 + +def which_pools(r): + """Return a list of pools indexes (in range(32)) that are to be included during reseed number r. + + According to _Practical Cryptography_, chapter 10.5.2 "Pools": + + "Pool P_i is included if 2**i is a divisor of r. Thus P_0 is used + every reseed, P_1 every other reseed, P_2 every fourth reseed, etc." + """ + # This is a separate function so that it can be unit-tested. + assert r >= 1 + retval = [] + mask = 0 + for i in range(32): + # "Pool P_i is included if 2**i is a divisor of [reseed_count]" + if (r & mask) == 0: + retval.append(i) + else: + break # optimization. once this fails, it always fails + mask = (mask << 1) | 1 + return retval + +class FortunaAccumulator(object): + + # An estimate of how many bytes we must append to pool 0 before it will + # contain 128 bits of entropy (with respect to an attack). We reseed the + # generator only after pool 0 contains `min_pool_size` bytes. Note that + # unlike with some other PRNGs, Fortuna's security does not rely on the + # accuracy of this estimate---we can accord to be optimistic here. + min_pool_size = 64 # size in bytes + + # If an attacker can predict some (but not all) of our entropy sources, the + # `min_pool_size` check may not be sufficient to prevent a successful state + # compromise extension attack. To resist this attack, Fortuna spreads the + # input across 32 pools, which are then consumed (to reseed the output + # generator) with exponentially decreasing frequency. + # + # In order to prevent an attacker from gaining knowledge of all 32 pools + # before we have a chance to fill them with enough information that the + # attacker cannot predict, we impose a rate limit of 10 reseeds/second (one + # per 100 ms). This ensures that a hypothetical 33rd pool would only be + # needed after a minimum of 13 years of sustained attack. + reseed_interval = 0.100 # time in seconds + + def __init__(self): + self.reseed_count = 0 + self.generator = FortunaGenerator.AESGenerator() + self.last_reseed = None + + # Initialize 32 FortunaPool instances. + # NB: This is _not_ equivalent to [FortunaPool()]*32, which would give + # us 32 references to the _same_ FortunaPool instance (and cause the + # assertion below to fail). + self.pools = [FortunaPool() for i in range(32)] # 32 pools + assert(self.pools[0] is not self.pools[1]) + + def _forget_last_reseed(self): + # This is not part of the standard Fortuna definition, and using this + # function frequently can weaken Fortuna's ability to resist a state + # compromise extension attack, but we need this in order to properly + # implement Crypto.Random.atfork(). Otherwise, forked child processes + # might continue to use their parent's PRNG state for up to 100ms in + # some cases. (e.g. CVE-2013-1445) + self.last_reseed = None + + def random_data(self, bytes): + current_time = time.time() + if (self.last_reseed is not None and self.last_reseed > current_time): # Avoid float comparison to None to make Py3k happy + warnings.warn("Clock rewind detected. Resetting last_reseed.", ClockRewindWarning) + self.last_reseed = None + if (self.pools[0].length >= self.min_pool_size and + (self.last_reseed is None or + current_time > self.last_reseed + self.reseed_interval)): + self._reseed(current_time) + # The following should fail if we haven't seeded the pool yet. + return self.generator.pseudo_random_data(bytes) + + def _reseed(self, current_time=None): + if current_time is None: + current_time = time.time() + seed = [] + self.reseed_count += 1 + self.last_reseed = current_time + for i in which_pools(self.reseed_count): + seed.append(self.pools[i].digest()) + self.pools[i].reset() + + seed = b("").join(seed) + self.generator.reseed(seed) + + def add_random_event(self, source_number, pool_number, data): + assert 1 <= len(data) <= 32 + assert 0 <= source_number <= 255 + assert 0 <= pool_number <= 31 + self.pools[pool_number].append(bchr(source_number)) + self.pools[pool_number].append(bchr(len(data))) + self.pools[pool_number].append(data) + +# vim:set ts=4 sw=4 sts=4 expandtab: diff --git a/frozen_deps/Crypto/Random/Fortuna/FortunaGenerator.py b/frozen_deps/Crypto/Random/Fortuna/FortunaGenerator.py new file mode 100644 index 0000000..489c81e --- /dev/null +++ b/frozen_deps/Crypto/Random/Fortuna/FortunaGenerator.py @@ -0,0 +1,132 @@ +# -*- coding: ascii -*- +# +# FortunaGenerator.py : Fortuna's internal PRNG +# +# Written in 2008 by Dwayne C. Litzenberger <[email protected]> +# +# =================================================================== +# The contents of this file are dedicated to the public domain. To +# the extent that dedication to the public domain is not available, +# everyone is granted a worldwide, perpetual, royalty-free, +# non-exclusive license to exercise all rights associated with the +# contents of this file for any purpose whatsoever. +# No rights are reserved. +# +# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, +# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND +# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS +# BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN +# ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN +# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +# SOFTWARE. +# =================================================================== + +__revision__ = "$Id$" + +import sys +if sys.version_info[0] is 2 and sys.version_info[1] is 1: + from Crypto.Util.py21compat import * +from Crypto.Util.py3compat import * + +import struct + +from Crypto.Util.number import ceil_shift, exact_log2, exact_div +from Crypto.Util import Counter +from Crypto.Cipher import AES + +from . import SHAd256 + +class AESGenerator(object): + """The Fortuna "generator" + + This is used internally by the Fortuna PRNG to generate arbitrary amounts + of pseudorandom data from a smaller amount of seed data. + + The output is generated by running AES-256 in counter mode and re-keying + after every mebibyte (2**16 blocks) of output. + """ + + block_size = AES.block_size # output block size in octets (128 bits) + key_size = 32 # key size in octets (256 bits) + + # Because of the birthday paradox, we expect to find approximately one + # collision for every 2**64 blocks of output from a real random source. + # However, this code generates pseudorandom data by running AES in + # counter mode, so there will be no collisions until the counter + # (theoretically) wraps around at 2**128 blocks. Thus, in order to prevent + # Fortuna's pseudorandom output from deviating perceptibly from a true + # random source, Ferguson and Schneier specify a limit of 2**16 blocks + # without rekeying. + max_blocks_per_request = 2**16 # Allow no more than this number of blocks per _pseudo_random_data request + + _four_kiblocks_of_zeros = b("\0") * block_size * 4096 + + def __init__(self): + self.counter = Counter.new(nbits=self.block_size*8, initial_value=0, little_endian=True) + self.key = None + + # Set some helper constants + self.block_size_shift = exact_log2(self.block_size) + assert (1 << self.block_size_shift) == self.block_size + + self.blocks_per_key = exact_div(self.key_size, self.block_size) + assert self.key_size == self.blocks_per_key * self.block_size + + self.max_bytes_per_request = self.max_blocks_per_request * self.block_size + + def reseed(self, seed): + if self.key is None: + self.key = b("\0") * self.key_size + + self._set_key(SHAd256.new(self.key + seed).digest()) + self.counter() # increment counter + assert len(self.key) == self.key_size + + def pseudo_random_data(self, bytes): + assert bytes >= 0 + + num_full_blocks = bytes >> 20 + remainder = bytes & ((1<<20)-1) + + retval = [] + for i in range(num_full_blocks): + retval.append(self._pseudo_random_data(1<<20)) + retval.append(self._pseudo_random_data(remainder)) + + return b("").join(retval) + + def _set_key(self, key): + self.key = key + self._cipher = AES.new(key, AES.MODE_CTR, counter=self.counter) + + def _pseudo_random_data(self, bytes): + if not (0 <= bytes <= self.max_bytes_per_request): + raise AssertionError("You cannot ask for more than 1 MiB of data per request") + + num_blocks = ceil_shift(bytes, self.block_size_shift) # num_blocks = ceil(bytes / self.block_size) + + # Compute the output + retval = self._generate_blocks(num_blocks)[:bytes] + + # Switch to a new key to avoid later compromises of this output (i.e. + # state compromise extension attacks) + self._set_key(self._generate_blocks(self.blocks_per_key)) + + assert len(retval) == bytes + assert len(self.key) == self.key_size + + return retval + + def _generate_blocks(self, num_blocks): + if self.key is None: + raise AssertionError("generator must be seeded before use") + assert 0 <= num_blocks <= self.max_blocks_per_request + retval = [] + for i in range(num_blocks >> 12): # xrange(num_blocks / 4096) + retval.append(self._cipher.encrypt(self._four_kiblocks_of_zeros)) + remaining_bytes = (num_blocks & 4095) << self.block_size_shift # (num_blocks % 4095) * self.block_size + retval.append(self._cipher.encrypt(self._four_kiblocks_of_zeros[:remaining_bytes])) + return b("").join(retval) + +# vim:set ts=4 sw=4 sts=4 expandtab: diff --git a/frozen_deps/Crypto/Random/Fortuna/SHAd256.py b/frozen_deps/Crypto/Random/Fortuna/SHAd256.py new file mode 100644 index 0000000..2e135c9 --- /dev/null +++ b/frozen_deps/Crypto/Random/Fortuna/SHAd256.py @@ -0,0 +1,98 @@ +# -*- coding: ascii -*- +# +# Random/Fortuna/SHAd256.py : SHA_d-256 hash function implementation +# +# Written in 2008 by Dwayne C. Litzenberger <[email protected]> +# +# =================================================================== +# The contents of this file are dedicated to the public domain. To +# the extent that dedication to the public domain is not available, +# everyone is granted a worldwide, perpetual, royalty-free, +# non-exclusive license to exercise all rights associated with the +# contents of this file for any purpose whatsoever. +# No rights are reserved. +# +# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, +# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND +# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS +# BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN +# ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN +# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +# SOFTWARE. +# =================================================================== + +"""\ +SHA_d-256 hash function implementation. + +This module should comply with PEP 247. +""" + +__revision__ = "$Id$" +__all__ = ['new', 'digest_size'] + +import sys +if sys.version_info[0] == 2 and sys.version_info[1] == 1: + from Crypto.Util.py21compat import * +from Crypto.Util.py3compat import * + +from binascii import b2a_hex + +from Crypto.Hash import SHA256 + +assert SHA256.digest_size == 32 + +class _SHAd256(object): + """SHA-256, doubled. + + Returns SHA-256(SHA-256(data)). + """ + + digest_size = SHA256.digest_size + + _internal = object() + + def __init__(self, internal_api_check, sha256_hash_obj): + if internal_api_check is not self._internal: + raise AssertionError("Do not instantiate this class directly. Use %s.new()" % (__name__,)) + self._h = sha256_hash_obj + + # PEP 247 "copy" method + def copy(self): + """Return a copy of this hashing object""" + return _SHAd256(SHAd256._internal, self._h.copy()) + + # PEP 247 "digest" method + def digest(self): + """Return the hash value of this object as a binary string""" + retval = SHA256.new(self._h.digest()).digest() + assert len(retval) == 32 + return retval + + # PEP 247 "hexdigest" method + def hexdigest(self): + """Return the hash value of this object as a (lowercase) hexadecimal string""" + retval = b2a_hex(self.digest()) + assert len(retval) == 64 + if sys.version_info[0] == 2: + return retval + else: + return retval.decode() + + # PEP 247 "update" method + def update(self, data): + self._h.update(data) + +# PEP 247 module-level "digest_size" variable +digest_size = _SHAd256.digest_size + +# PEP 247 module-level "new" function +def new(data=None): + """Return a new SHAd256 hashing object""" + if not data: + data=b("") + sha = _SHAd256(_SHAd256._internal, SHA256.new(data)) + sha.new = globals()['new'] + return sha + +# vim:set ts=4 sw=4 sts=4 expandtab: diff --git a/frozen_deps/Crypto/Random/Fortuna/__init__.py b/frozen_deps/Crypto/Random/Fortuna/__init__.py new file mode 100644 index 0000000..e69de29 --- /dev/null +++ b/frozen_deps/Crypto/Random/Fortuna/__init__.py diff --git a/frozen_deps/Crypto/Random/OSRNG/__init__.py b/frozen_deps/Crypto/Random/OSRNG/__init__.py new file mode 100644 index 0000000..2fbbecb --- /dev/null +++ b/frozen_deps/Crypto/Random/OSRNG/__init__.py @@ -0,0 +1,40 @@ +# +# Random/OSRNG/__init__.py : Platform-independent OS RNG API +# +# Written in 2008 by Dwayne C. Litzenberger <[email protected]> +# +# =================================================================== +# The contents of this file are dedicated to the public domain. To +# the extent that dedication to the public domain is not available, +# everyone is granted a worldwide, perpetual, royalty-free, +# non-exclusive license to exercise all rights associated with the +# contents of this file for any purpose whatsoever. +# No rights are reserved. +# +# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, +# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND +# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS +# BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN +# ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN +# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +# SOFTWARE. +# =================================================================== + +"""Provides a platform-independent interface to the random number generators +supplied by various operating systems.""" + +__revision__ = "$Id$" + +import os + +if os.name == 'posix': + from Crypto.Random.OSRNG.posix import new +elif os.name == 'nt': + from Crypto.Random.OSRNG.nt import new +elif hasattr(os, 'urandom'): + from Crypto.Random.OSRNG.fallback import new +else: + raise ImportError("Not implemented") + +# vim:set ts=4 sw=4 sts=4 expandtab: diff --git a/frozen_deps/Crypto/Random/OSRNG/fallback.py b/frozen_deps/Crypto/Random/OSRNG/fallback.py new file mode 100644 index 0000000..6d4130d --- /dev/null +++ b/frozen_deps/Crypto/Random/OSRNG/fallback.py @@ -0,0 +1,46 @@ +# +# Random/OSRNG/fallback.py : Fallback entropy source for systems with os.urandom +# +# Written in 2008 by Dwayne C. Litzenberger <[email protected]> +# +# =================================================================== +# The contents of this file are dedicated to the public domain. To +# the extent that dedication to the public domain is not available, +# everyone is granted a worldwide, perpetual, royalty-free, +# non-exclusive license to exercise all rights associated with the +# contents of this file for any purpose whatsoever. +# No rights are reserved. +# +# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, +# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND +# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS +# BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN +# ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN +# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +# SOFTWARE. +# =================================================================== + + +__revision__ = "$Id$" +__all__ = ['PythonOSURandomRNG'] + +import os + +from .rng_base import BaseRNG + +class PythonOSURandomRNG(BaseRNG): + + name = "<os.urandom>" + + def __init__(self): + self._read = os.urandom + BaseRNG.__init__(self) + + def _close(self): + self._read = None + +def new(*args, **kwargs): + return PythonOSURandomRNG(*args, **kwargs) + +# vim:set ts=4 sw=4 sts=4 expandtab: diff --git a/frozen_deps/Crypto/Random/OSRNG/posix.py b/frozen_deps/Crypto/Random/OSRNG/posix.py new file mode 100644 index 0000000..ceea7b7 --- /dev/null +++ b/frozen_deps/Crypto/Random/OSRNG/posix.py @@ -0,0 +1,86 @@ +# +# Random/OSRNG/posix.py : OS entropy source for POSIX systems +# +# Written in 2008 by Dwayne C. Litzenberger <[email protected]> +# +# =================================================================== +# The contents of this file are dedicated to the public domain. To +# the extent that dedication to the public domain is not available, +# everyone is granted a worldwide, perpetual, royalty-free, +# non-exclusive license to exercise all rights associated with the +# contents of this file for any purpose whatsoever. +# No rights are reserved. +# +# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, +# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND +# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS +# BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN +# ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN +# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +# SOFTWARE. +# =================================================================== + + +__revision__ = "$Id$" +__all__ = ['DevURandomRNG'] + +import errno +import os +import stat + +from .rng_base import BaseRNG +from Crypto.Util.py3compat import b + +class DevURandomRNG(BaseRNG): + + def __init__(self, devname=None): + if devname is None: + self.name = "/dev/urandom" + else: + self.name = devname + + # Test that /dev/urandom is a character special device + f = open(self.name, "rb", 0) + fmode = os.fstat(f.fileno())[stat.ST_MODE] + if not stat.S_ISCHR(fmode): + f.close() + raise TypeError("%r is not a character special device" % (self.name,)) + + self.__file = f + + BaseRNG.__init__(self) + + def _close(self): + self.__file.close() + + def _read(self, N): + # Starting with Python 3 open with buffering=0 returns a FileIO object. + # FileIO.read behaves like read(2) and not like fread(3) and thus we + # have to handle the case that read returns less data as requested here + # more carefully. + data = b("") + while len(data) < N: + try: + d = self.__file.read(N - len(data)) + except IOError as e: + # read(2) has been interrupted by a signal; redo the read + if e.errno == errno.EINTR: + continue + raise + + if d is None: + # __file is in non-blocking mode and no data is available + return data + if len(d) == 0: + # __file is in blocking mode and arrived at EOF + return data + + data += d + return data + +def new(*args, **kwargs): + return DevURandomRNG(*args, **kwargs) + + +# vim:set ts=4 sw=4 sts=4 expandtab: diff --git a/frozen_deps/Crypto/Random/OSRNG/rng_base.py b/frozen_deps/Crypto/Random/OSRNG/rng_base.py new file mode 100644 index 0000000..546f2e9 --- /dev/null +++ b/frozen_deps/Crypto/Random/OSRNG/rng_base.py @@ -0,0 +1,88 @@ +# +# Random/OSRNG/rng_base.py : Base class for OSRNG +# +# Written in 2008 by Dwayne C. Litzenberger <[email protected]> +# +# =================================================================== +# The contents of this file are dedicated to the public domain. To +# the extent that dedication to the public domain is not available, +# everyone is granted a worldwide, perpetual, royalty-free, +# non-exclusive license to exercise all rights associated with the +# contents of this file for any purpose whatsoever. +# No rights are reserved. +# +# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, +# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND +# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS +# BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN +# ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN +# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +# SOFTWARE. +# =================================================================== + +__revision__ = "$Id$" + +import sys +if sys.version_info[0] == 2 and sys.version_info[1] == 1: + from Crypto.Util.py21compat import * + +class BaseRNG(object): + + def __init__(self): + self.closed = False + self._selftest() + + def __del__(self): + self.close() + + def _selftest(self): + # Test that urandom can return data + data = self.read(16) + if len(data) != 16: + raise AssertionError("read truncated") + + # Test that we get different data every time (if we don't, the RNG is + # probably malfunctioning) + data2 = self.read(16) + if data == data2: + raise AssertionError("OS RNG returned duplicate data") + + # PEP 343: Support for the "with" statement + def __enter__(self): + pass + def __exit__(self): + """PEP 343 support""" + self.close() + + def close(self): + if not self.closed: + self._close() + self.closed = True + + def flush(self): + pass + + def read(self, N=-1): + """Return N bytes from the RNG.""" + if self.closed: + raise ValueError("I/O operation on closed file") + if not isinstance(N, int): + raise TypeError("an integer is required") + if N < 0: + raise ValueError("cannot read to end of infinite stream") + elif N == 0: + return "" + data = self._read(N) + if len(data) != N: + raise AssertionError("%s produced truncated output (requested %d, got %d)" % (self.name, N, len(data))) + return data + + def _close(self): + raise NotImplementedError("child class must implement this") + + def _read(self, N): + raise NotImplementedError("child class must implement this") + + +# vim:set ts=4 sw=4 sts=4 expandtab: diff --git a/frozen_deps/Crypto/Random/_UserFriendlyRNG.py b/frozen_deps/Crypto/Random/_UserFriendlyRNG.py new file mode 100644 index 0000000..937c17d --- /dev/null +++ b/frozen_deps/Crypto/Random/_UserFriendlyRNG.py @@ -0,0 +1,230 @@ +# -*- coding: utf-8 -*- +# +# Random/_UserFriendlyRNG.py : A user-friendly random number generator +# +# Written in 2008 by Dwayne C. Litzenberger <[email protected]> +# +# =================================================================== +# The contents of this file are dedicated to the public domain. To +# the extent that dedication to the public domain is not available, +# everyone is granted a worldwide, perpetual, royalty-free, +# non-exclusive license to exercise all rights associated with the +# contents of this file for any purpose whatsoever. +# No rights are reserved. +# +# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, +# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND +# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS +# BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN +# ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN +# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +# SOFTWARE. +# =================================================================== + +__revision__ = "$Id$" + +import sys +if sys.version_info[0] == 2 and sys.version_info[1] == 1: + from Crypto.Util.py21compat import * + +import os +import threading +import struct +import time +from math import floor + +from Crypto.Random import OSRNG +from Crypto.Random.Fortuna import FortunaAccumulator + +class _EntropySource(object): + def __init__(self, accumulator, src_num): + self._fortuna = accumulator + self._src_num = src_num + self._pool_num = 0 + + def feed(self, data): + self._fortuna.add_random_event(self._src_num, self._pool_num, data) + self._pool_num = (self._pool_num + 1) & 31 + +class _EntropyCollector(object): + + def __init__(self, accumulator): + self._osrng = OSRNG.new() + self._osrng_es = _EntropySource(accumulator, 255) + self._time_es = _EntropySource(accumulator, 254) + self._clock_es = _EntropySource(accumulator, 253) + + def reinit(self): + # Add 256 bits to each of the 32 pools, twice. (For a total of 16384 + # bits collected from the operating system.) + for i in range(2): + block = self._osrng.read(32*32) + for p in range(32): + self._osrng_es.feed(block[p*32:(p+1)*32]) + block = None + self._osrng.flush() + + def collect(self): + # Collect 64 bits of entropy from the operating system and feed it to Fortuna. + self._osrng_es.feed(self._osrng.read(8)) + + # Add the fractional part of time.time() + t = time.time() + self._time_es.feed(struct.pack("@I", int(2**30 * (t - floor(t))))) + + # Add the fractional part of time.clock() + t = time.clock() + self._clock_es.feed(struct.pack("@I", int(2**30 * (t - floor(t))))) + + +class _UserFriendlyRNG(object): + + def __init__(self): + self.closed = False + self._fa = FortunaAccumulator.FortunaAccumulator() + self._ec = _EntropyCollector(self._fa) + self.reinit() + + def reinit(self): + """Initialize the random number generator and seed it with entropy from + the operating system. + """ + + # Save the pid (helps ensure that Crypto.Random.atfork() gets called) + self._pid = os.getpid() + + # Collect entropy from the operating system and feed it to + # FortunaAccumulator + self._ec.reinit() + + # Override FortunaAccumulator's 100ms minimum re-seed interval. This + # is necessary to avoid a race condition between this function and + # self.read(), which that can otherwise cause forked child processes to + # produce identical output. (e.g. CVE-2013-1445) + # + # Note that if this function can be called frequently by an attacker, + # (and if the bits from OSRNG are insufficiently random) it will weaken + # Fortuna's ability to resist a state compromise extension attack. + self._fa._forget_last_reseed() + + def close(self): + self.closed = True + self._osrng = None + self._fa = None + + def flush(self): + pass + + def read(self, N): + """Return N bytes from the RNG.""" + if self.closed: + raise ValueError("I/O operation on closed file") + if not isinstance(N, int): + raise TypeError("an integer is required") + if N < 0: + raise ValueError("cannot read to end of infinite stream") + + # Collect some entropy and feed it to Fortuna + self._ec.collect() + + # Ask Fortuna to generate some bytes + retval = self._fa.random_data(N) + + # Check that we haven't forked in the meantime. (If we have, we don't + # want to use the data, because it might have been duplicated in the + # parent process. + self._check_pid() + + # Return the random data. + return retval + + def _check_pid(self): + # Lame fork detection to remind developers to invoke Random.atfork() + # after every call to os.fork(). Note that this check is not reliable, + # since process IDs can be reused on most operating systems. + # + # You need to do Random.atfork() in the child process after every call + # to os.fork() to avoid reusing PRNG state. If you want to avoid + # leaking PRNG state to child processes (for example, if you are using + # os.setuid()) then you should also invoke Random.atfork() in the + # *parent* process. + if os.getpid() != self._pid: + raise AssertionError("PID check failed. RNG must be re-initialized after fork(). Hint: Try Random.atfork()") + + +class _LockingUserFriendlyRNG(_UserFriendlyRNG): + def __init__(self): + self._lock = threading.Lock() + _UserFriendlyRNG.__init__(self) + + def close(self): + self._lock.acquire() + try: + return _UserFriendlyRNG.close(self) + finally: + self._lock.release() + + def reinit(self): + self._lock.acquire() + try: + return _UserFriendlyRNG.reinit(self) + finally: + self._lock.release() + + def read(self, bytes): + self._lock.acquire() + try: + return _UserFriendlyRNG.read(self, bytes) + finally: + self._lock.release() + +class RNGFile(object): + def __init__(self, singleton): + self.closed = False + self._singleton = singleton + + # PEP 343: Support for the "with" statement + def __enter__(self): + """PEP 343 support""" + def __exit__(self): + """PEP 343 support""" + self.close() + + def close(self): + # Don't actually close the singleton, just close this RNGFile instance. + self.closed = True + self._singleton = None + + def read(self, bytes): + if self.closed: + raise ValueError("I/O operation on closed file") + return self._singleton.read(bytes) + + def flush(self): + if self.closed: + raise ValueError("I/O operation on closed file") + +_singleton_lock = threading.Lock() +_singleton = None +def _get_singleton(): + global _singleton + _singleton_lock.acquire() + try: + if _singleton is None: + _singleton = _LockingUserFriendlyRNG() + return _singleton + finally: + _singleton_lock.release() + +def new(): + return RNGFile(_get_singleton()) + +def reinit(): + _get_singleton().reinit() + +def get_random_bytes(n): + """Return the specified number of cryptographically-strong random bytes.""" + return _get_singleton().read(n) + +# vim:set ts=4 sw=4 sts=4 expandtab: diff --git a/frozen_deps/Crypto/Random/__init__.py b/frozen_deps/Crypto/Random/__init__.py new file mode 100644 index 0000000..659ffee --- /dev/null +++ b/frozen_deps/Crypto/Random/__init__.py @@ -0,0 +1,43 @@ +# -*- coding: utf-8 -*- +# +# Random/__init__.py : PyCrypto random number generation +# +# Written in 2008 by Dwayne C. Litzenberger <[email protected]> +# +# =================================================================== +# The contents of this file are dedicated to the public domain. To +# the extent that dedication to the public domain is not available, +# everyone is granted a worldwide, perpetual, royalty-free, +# non-exclusive license to exercise all rights associated with the +# contents of this file for any purpose whatsoever. +# No rights are reserved. +# +# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, +# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND +# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS +# BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN +# ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN +# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +# SOFTWARE. +# =================================================================== + +__revision__ = "$Id$" +__all__ = ['new'] + +from Crypto.Random import OSRNG +from Crypto.Random import _UserFriendlyRNG + +def new(*args, **kwargs): + """Return a file-like object that outputs cryptographically random bytes.""" + return _UserFriendlyRNG.new(*args, **kwargs) + +def atfork(): + """Call this whenever you call os.fork()""" + _UserFriendlyRNG.reinit() + +def get_random_bytes(n): + """Return the specified number of cryptographically-strong random bytes.""" + return _UserFriendlyRNG.get_random_bytes(n) + +# vim:set ts=4 sw=4 sts=4 expandtab: diff --git a/frozen_deps/Crypto/Random/random.py b/frozen_deps/Crypto/Random/random.py new file mode 100644 index 0000000..cd9a221 --- /dev/null +++ b/frozen_deps/Crypto/Random/random.py @@ -0,0 +1,142 @@ +# -*- coding: utf-8 -*- +# +# Random/random.py : Strong alternative for the standard 'random' module +# +# Written in 2008 by Dwayne C. Litzenberger <[email protected]> +# +# =================================================================== +# The contents of this file are dedicated to the public domain. To +# the extent that dedication to the public domain is not available, +# everyone is granted a worldwide, perpetual, royalty-free, +# non-exclusive license to exercise all rights associated with the +# contents of this file for any purpose whatsoever. +# No rights are reserved. +# +# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, +# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND +# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS +# BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN +# ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN +# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +# SOFTWARE. +# =================================================================== + +"""A cryptographically strong version of Python's standard "random" module.""" + +__revision__ = "$Id$" +__all__ = ['StrongRandom', 'getrandbits', 'randrange', 'randint', 'choice', 'shuffle', 'sample'] + +from Crypto import Random +import sys +if sys.version_info[0] == 2 and sys.version_info[1] == 1: + from Crypto.Util.py21compat import * + +class StrongRandom(object): + def __init__(self, rng=None, randfunc=None): + if randfunc is None and rng is None: + self._randfunc = None + elif randfunc is not None and rng is None: + self._randfunc = randfunc + elif randfunc is None and rng is not None: + self._randfunc = rng.read + else: + raise ValueError("Cannot specify both 'rng' and 'randfunc'") + + def getrandbits(self, k): + """Return a python long integer with k random bits.""" + if self._randfunc is None: + self._randfunc = Random.new().read + mask = (1 << k) - 1 + return mask & bytes_to_long(self._randfunc(ceil_div(k, 8))) + + def randrange(self, *args): + """randrange([start,] stop[, step]): + Return a randomly-selected element from range(start, stop, step).""" + if len(args) == 3: + (start, stop, step) = args + elif len(args) == 2: + (start, stop) = args + step = 1 + elif len(args) == 1: + (stop,) = args + start = 0 + step = 1 + else: + raise TypeError("randrange expected at most 3 arguments, got %d" % (len(args),)) + if (not isinstance(start, int) + or not isinstance(stop, int) + or not isinstance(step, int)): + raise TypeError("randrange requires integer arguments") + if step == 0: + raise ValueError("randrange step argument must not be zero") + + num_choices = ceil_div(stop - start, step) + if num_choices < 0: + num_choices = 0 + if num_choices < 1: + raise ValueError("empty range for randrange(%r, %r, %r)" % (start, stop, step)) + + # Pick a random number in the range of possible numbers + r = num_choices + while r >= num_choices: + r = self.getrandbits(size(num_choices)) + + return start + (step * r) + + def randint(self, a, b): + """Return a random integer N such that a <= N <= b.""" + if not isinstance(a, int) or not isinstance(b, int): + raise TypeError("randint requires integer arguments") + N = self.randrange(a, b+1) + assert a <= N <= b + return N + + def choice(self, seq): + """Return a random element from a (non-empty) sequence. + + If the seqence is empty, raises IndexError. + """ + if len(seq) == 0: + raise IndexError("empty sequence") + return seq[self.randrange(len(seq))] + + def shuffle(self, x): + """Shuffle the sequence in place.""" + # Make a (copy) of the list of objects we want to shuffle + items = list(x) + + # Choose a random item (without replacement) until all the items have been + # chosen. + for i in range(len(x)): + x[i] = items.pop(self.randrange(len(items))) + + def sample(self, population, k): + """Return a k-length list of unique elements chosen from the population sequence.""" + + num_choices = len(population) + if k > num_choices: + raise ValueError("sample larger than population") + + retval = [] + selected = {} # we emulate a set using a dict here + for i in range(k): + r = None + while r is None or r in selected: + r = self.randrange(num_choices) + retval.append(population[r]) + selected[r] = 1 + return retval + +_r = StrongRandom() +getrandbits = _r.getrandbits +randrange = _r.randrange +randint = _r.randint +choice = _r.choice +shuffle = _r.shuffle +sample = _r.sample + +# These are at the bottom to avoid problems with recursive imports +from Crypto.Util.number import ceil_div, bytes_to_long, long_to_bytes, size + +# vim:set ts=4 sw=4 sts=4 expandtab: diff --git a/frozen_deps/Crypto/Signature/PKCS1_PSS.py b/frozen_deps/Crypto/Signature/PKCS1_PSS.py new file mode 100644 index 0000000..319851e --- /dev/null +++ b/frozen_deps/Crypto/Signature/PKCS1_PSS.py @@ -0,0 +1,355 @@ +# -*- coding: utf-8 -*- +# +# Signature/PKCS1_PSS.py : PKCS#1 PPS +# +# =================================================================== +# The contents of this file are dedicated to the public domain. To +# the extent that dedication to the public domain is not available, +# everyone is granted a worldwide, perpetual, royalty-free, +# non-exclusive license to exercise all rights associated with the +# contents of this file for any purpose whatsoever. +# No rights are reserved. +# +# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, +# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND +# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS +# BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN +# ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN +# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +# SOFTWARE. +# =================================================================== + +"""RSA digital signature protocol with appendix according to PKCS#1 PSS. + +See RFC3447__ or the `original RSA Labs specification`__. + +This scheme is more properly called ``RSASSA-PSS``. + +For example, a sender may authenticate a message using SHA-1 and PSS like +this: + + >>> from Crypto.Signature import PKCS1_PSS + >>> from Crypto.Hash import SHA + >>> from Crypto.PublicKey import RSA + >>> from Crypto import Random + >>> + >>> message = 'To be signed' + >>> key = RSA.importKey(open('privkey.der').read()) + >>> h = SHA.new() + >>> h.update(message) + >>> signer = PKCS1_PSS.new(key) + >>> signature = PKCS1_PSS.sign(key) + +At the receiver side, verification can be done like using the public part of +the RSA key: + + >>> key = RSA.importKey(open('pubkey.der').read()) + >>> h = SHA.new() + >>> h.update(message) + >>> verifier = PKCS1_PSS.new(key) + >>> if verifier.verify(h, signature): + >>> print "The signature is authentic." + >>> else: + >>> print "The signature is not authentic." + +:undocumented: __revision__, __package__ + +.. __: http://www.ietf.org/rfc/rfc3447.txt +.. __: http://www.rsa.com/rsalabs/node.asp?id=2125 +""" + +# Allow nested scopes in Python 2.1 +# See http://oreilly.com/pub/a/python/2001/04/19/pythonnews.html + + +__revision__ = "$Id$" +__all__ = [ 'new', 'PSS_SigScheme' ] + +from Crypto.Util.py3compat import * +if sys.version_info[0] == 2 and sys.version_info[1] == 1: + from Crypto.Util.py21compat import * +import Crypto.Util.number +from Crypto.Util.number import ceil_shift, ceil_div, long_to_bytes +from Crypto.Util.strxor import strxor + +class PSS_SigScheme: + """This signature scheme can perform PKCS#1 PSS RSA signature or verification.""" + + def __init__(self, key, mgfunc, saltLen): + """Initialize this PKCS#1 PSS signature scheme object. + + :Parameters: + key : an RSA key object + If a private half is given, both signature and verification are possible. + If a public half is given, only verification is possible. + mgfunc : callable + A mask generation function that accepts two parameters: a string to + use as seed, and the lenth of the mask to generate, in bytes. + saltLen : int + Length of the salt, in bytes. + """ + self._key = key + self._saltLen = saltLen + self._mgfunc = mgfunc + + def can_sign(self): + """Return True if this cipher object can be used for signing messages.""" + return self._key.has_private() + + def sign(self, mhash): + """Produce the PKCS#1 PSS signature of a message. + + This function is named ``RSASSA-PSS-SIGN``, and is specified in + section 8.1.1 of RFC3447. + + :Parameters: + mhash : hash object + The hash that was carried out over the message. This is an object + belonging to the `Crypto.Hash` module. + + :Return: The PSS signature encoded as a string. + :Raise ValueError: + If the RSA key length is not sufficiently long to deal with the given + hash algorithm. + :Raise TypeError: + If the RSA key has no private half. + + :attention: Modify the salt length and the mask generation function only + if you know what you are doing. + The receiver must use the same parameters too. + """ + # TODO: Verify the key is RSA + + randfunc = self._key._randfunc + + # Set defaults for salt length and mask generation function + if self._saltLen == None: + sLen = mhash.digest_size + else: + sLen = self._saltLen + if self._mgfunc: + mgf = self._mgfunc + else: + mgf = lambda x,y: MGF1(x,y,mhash) + + modBits = Crypto.Util.number.size(self._key.n) + + # See 8.1.1 in RFC3447 + k = ceil_div(modBits,8) # Convert from bits to bytes + # Step 1 + em = EMSA_PSS_ENCODE(mhash, modBits-1, randfunc, mgf, sLen) + # Step 2a (OS2IP) and 2b (RSASP1) + m = self._key.decrypt(em) + # Step 2c (I2OSP) + S = bchr(0x00)*(k-len(m)) + m + return S + + def verify(self, mhash, S): + """Verify that a certain PKCS#1 PSS signature is authentic. + + This function checks if the party holding the private half of the given + RSA key has really signed the message. + + This function is called ``RSASSA-PSS-VERIFY``, and is specified in section + 8.1.2 of RFC3447. + + :Parameters: + mhash : hash object + The hash that was carried out over the message. This is an object + belonging to the `Crypto.Hash` module. + S : string + The signature that needs to be validated. + + :Return: True if verification is correct. False otherwise. + """ + # TODO: Verify the key is RSA + + # Set defaults for salt length and mask generation function + if self._saltLen == None: + sLen = mhash.digest_size + else: + sLen = self._saltLen + if self._mgfunc: + mgf = self._mgfunc + else: + mgf = lambda x,y: MGF1(x,y,mhash) + + modBits = Crypto.Util.number.size(self._key.n) + + # See 8.1.2 in RFC3447 + k = ceil_div(modBits,8) # Convert from bits to bytes + # Step 1 + if len(S) != k: + return False + # Step 2a (O2SIP), 2b (RSAVP1), and partially 2c (I2OSP) + # Note that signature must be smaller than the module + # but RSA.py won't complain about it. + # TODO: Fix RSA object; don't do it here. + em = self._key.encrypt(S, 0)[0] + # Step 2c + emLen = ceil_div(modBits-1,8) + em = bchr(0x00)*(emLen-len(em)) + em + # Step 3 + try: + result = EMSA_PSS_VERIFY(mhash, em, modBits-1, mgf, sLen) + except ValueError: + return False + # Step 4 + return result + +def MGF1(mgfSeed, maskLen, hash): + """Mask Generation Function, described in B.2.1""" + T = b("") + for counter in range(ceil_div(maskLen, hash.digest_size)): + c = long_to_bytes(counter, 4) + T = T + hash.new(mgfSeed + c).digest() + assert(len(T)>=maskLen) + return T[:maskLen] + +def EMSA_PSS_ENCODE(mhash, emBits, randFunc, mgf, sLen): + """ + Implement the ``EMSA-PSS-ENCODE`` function, as defined + in PKCS#1 v2.1 (RFC3447, 9.1.1). + + The original ``EMSA-PSS-ENCODE`` actually accepts the message ``M`` as input, + and hash it internally. Here, we expect that the message has already + been hashed instead. + + :Parameters: + mhash : hash object + The hash object that holds the digest of the message being signed. + emBits : int + Maximum length of the final encoding, in bits. + randFunc : callable + An RNG function that accepts as only parameter an int, and returns + a string of random bytes, to be used as salt. + mgf : callable + A mask generation function that accepts two parameters: a string to + use as seed, and the lenth of the mask to generate, in bytes. + sLen : int + Length of the salt, in bytes. + + :Return: An ``emLen`` byte long string that encodes the hash + (with ``emLen = \ceil(emBits/8)``). + + :Raise ValueError: + When digest or salt length are too big. + """ + + emLen = ceil_div(emBits,8) + + # Bitmask of digits that fill up + lmask = 0 + for i in range(8*emLen-emBits): + lmask = lmask>>1 | 0x80 + + # Step 1 and 2 have been already done + # Step 3 + if emLen < mhash.digest_size+sLen+2: + raise ValueError("Digest or salt length are too long for given key size.") + # Step 4 + salt = b("") + if randFunc and sLen>0: + salt = randFunc(sLen) + # Step 5 and 6 + h = mhash.new(bchr(0x00)*8 + mhash.digest() + salt) + # Step 7 and 8 + db = bchr(0x00)*(emLen-sLen-mhash.digest_size-2) + bchr(0x01) + salt + # Step 9 + dbMask = mgf(h.digest(), emLen-mhash.digest_size-1) + # Step 10 + maskedDB = strxor(db,dbMask) + # Step 11 + maskedDB = bchr(bord(maskedDB[0]) & ~lmask) + maskedDB[1:] + # Step 12 + em = maskedDB + h.digest() + bchr(0xBC) + return em + +def EMSA_PSS_VERIFY(mhash, em, emBits, mgf, sLen): + """ + Implement the ``EMSA-PSS-VERIFY`` function, as defined + in PKCS#1 v2.1 (RFC3447, 9.1.2). + + ``EMSA-PSS-VERIFY`` actually accepts the message ``M`` as input, + and hash it internally. Here, we expect that the message has already + been hashed instead. + + :Parameters: + mhash : hash object + The hash object that holds the digest of the message to be verified. + em : string + The signature to verify, therefore proving that the sender really signed + the message that was received. + emBits : int + Length of the final encoding (em), in bits. + mgf : callable + A mask generation function that accepts two parameters: a string to + use as seed, and the lenth of the mask to generate, in bytes. + sLen : int + Length of the salt, in bytes. + + :Return: 0 if the encoding is consistent, 1 if it is inconsistent. + + :Raise ValueError: + When digest or salt length are too big. + """ + + emLen = ceil_div(emBits,8) + + # Bitmask of digits that fill up + lmask = 0 + for i in range(8*emLen-emBits): + lmask = lmask>>1 | 0x80 + + # Step 1 and 2 have been already done + # Step 3 + if emLen < mhash.digest_size+sLen+2: + return False + # Step 4 + if ord(em[-1:])!=0xBC: + return False + # Step 5 + maskedDB = em[:emLen-mhash.digest_size-1] + h = em[emLen-mhash.digest_size-1:-1] + # Step 6 + if lmask & bord(em[0]): + return False + # Step 7 + dbMask = mgf(h, emLen-mhash.digest_size-1) + # Step 8 + db = strxor(maskedDB, dbMask) + # Step 9 + db = bchr(bord(db[0]) & ~lmask) + db[1:] + # Step 10 + if not db.startswith(bchr(0x00)*(emLen-mhash.digest_size-sLen-2) + bchr(0x01)): + return False + # Step 11 + salt = b("") + if sLen: salt = db[-sLen:] + # Step 12 and 13 + hp = mhash.new(bchr(0x00)*8 + mhash.digest() + salt).digest() + # Step 14 + if h!=hp: + return False + return True + +def new(key, mgfunc=None, saltLen=None): + """Return a signature scheme object `PSS_SigScheme` that + can be used to perform PKCS#1 PSS signature or verification. + + :Parameters: + key : RSA key object + The key to use to sign or verify the message. This is a `Crypto.PublicKey.RSA` object. + Signing is only possible if *key* is a private RSA key. + mgfunc : callable + A mask generation function that accepts two parameters: a string to + use as seed, and the lenth of the mask to generate, in bytes. + If not specified, the standard MGF1 is used. + saltLen : int + Length of the salt, in bytes. If not specified, it matches the output + size of the hash function. + + """ + return PSS_SigScheme(key, mgfunc, saltLen) + diff --git a/frozen_deps/Crypto/Signature/PKCS1_v1_5.py b/frozen_deps/Crypto/Signature/PKCS1_v1_5.py new file mode 100644 index 0000000..73ac251 --- /dev/null +++ b/frozen_deps/Crypto/Signature/PKCS1_v1_5.py @@ -0,0 +1,236 @@ +# -*- coding: utf-8 -*- +# +# Signature/PKCS1-v1_5.py : PKCS#1 v1.5 +# +# =================================================================== +# The contents of this file are dedicated to the public domain. To +# the extent that dedication to the public domain is not available, +# everyone is granted a worldwide, perpetual, royalty-free, +# non-exclusive license to exercise all rights associated with the +# contents of this file for any purpose whatsoever. +# No rights are reserved. +# +# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, +# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND +# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS +# BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN +# ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN +# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +# SOFTWARE. +# =================================================================== + +""" +RSA digital signature protocol according to PKCS#1 v1.5 + +See RFC3447__ or the `original RSA Labs specification`__. + +This scheme is more properly called ``RSASSA-PKCS1-v1_5``. + +For example, a sender may authenticate a message using SHA-1 like +this: + + >>> from Crypto.Signature import PKCS1_v1_5 + >>> from Crypto.Hash import SHA + >>> from Crypto.PublicKey import RSA + >>> + >>> message = 'To be signed' + >>> key = RSA.importKey(open('privkey.der').read()) + >>> h = SHA.new(message) + >>> signer = PKCS1_v1_5.new(key) + >>> signature = signer.sign(h) + +At the receiver side, verification can be done using the public part of +the RSA key: + + >>> key = RSA.importKey(open('pubkey.der').read()) + >>> h = SHA.new(message) + >>> verifier = PKCS1_v1_5.new(key) + >>> if verifier.verify(h, signature): + >>> print "The signature is authentic." + >>> else: + >>> print "The signature is not authentic." + +:undocumented: __revision__, __package__ + +.. __: http://www.ietf.org/rfc/rfc3447.txt +.. __: http://www.rsa.com/rsalabs/node.asp?id=2125 +""" + +__revision__ = "$Id$" +__all__ = [ 'new', 'PKCS115_SigScheme' ] + +import Crypto.Util.number +from Crypto.Util.number import ceil_div +from Crypto.Util.asn1 import DerSequence, DerNull, DerOctetString +from Crypto.Util.py3compat import * + +class PKCS115_SigScheme: + """This signature scheme can perform PKCS#1 v1.5 RSA signature or verification.""" + + def __init__(self, key): + """Initialize this PKCS#1 v1.5 signature scheme object. + + :Parameters: + key : an RSA key object + If a private half is given, both signature and verification are possible. + If a public half is given, only verification is possible. + """ + self._key = key + + def can_sign(self): + """Return True if this cipher object can be used for signing messages.""" + return self._key.has_private() + + def sign(self, mhash): + """Produce the PKCS#1 v1.5 signature of a message. + + This function is named ``RSASSA-PKCS1-V1_5-SIGN``, and is specified in + section 8.2.1 of RFC3447. + + :Parameters: + mhash : hash object + The hash that was carried out over the message. This is an object + belonging to the `Crypto.Hash` module. + + :Return: The signature encoded as a string. + :Raise ValueError: + If the RSA key length is not sufficiently long to deal with the given + hash algorithm. + :Raise TypeError: + If the RSA key has no private half. + """ + # TODO: Verify the key is RSA + + # See 8.2.1 in RFC3447 + modBits = Crypto.Util.number.size(self._key.n) + k = ceil_div(modBits,8) # Convert from bits to bytes + + # Step 1 + em = EMSA_PKCS1_V1_5_ENCODE(mhash, k) + # Step 2a (OS2IP) and 2b (RSASP1) + m = self._key.decrypt(em) + # Step 2c (I2OSP) + S = bchr(0x00)*(k-len(m)) + m + return S + + def verify(self, mhash, S): + """Verify that a certain PKCS#1 v1.5 signature is authentic. + + This function checks if the party holding the private half of the key + really signed the message. + + This function is named ``RSASSA-PKCS1-V1_5-VERIFY``, and is specified in + section 8.2.2 of RFC3447. + + :Parameters: + mhash : hash object + The hash that was carried out over the message. This is an object + belonging to the `Crypto.Hash` module. + S : string + The signature that needs to be validated. + + :Return: True if verification is correct. False otherwise. + """ + # TODO: Verify the key is RSA + + # See 8.2.2 in RFC3447 + modBits = Crypto.Util.number.size(self._key.n) + k = ceil_div(modBits,8) # Convert from bits to bytes + + # Step 1 + if len(S) != k: + return 0 + # Step 2a (O2SIP) and 2b (RSAVP1) + # Note that signature must be smaller than the module + # but RSA.py won't complain about it. + # TODO: Fix RSA object; don't do it here. + m = self._key.encrypt(S, 0)[0] + # Step 2c (I2OSP) + em1 = bchr(0x00)*(k-len(m)) + m + # Step 3 + try: + em2 = EMSA_PKCS1_V1_5_ENCODE(mhash, k) + except ValueError: + return 0 + # Step 4 + # By comparing the full encodings (as opposed to checking each + # of its components one at a time) we avoid attacks to the padding + # scheme like Bleichenbacher's (see http://www.mail-archive.com/[email protected]/msg06537). + # + return em1==em2 + +def EMSA_PKCS1_V1_5_ENCODE(hash, emLen): + """ + Implement the ``EMSA-PKCS1-V1_5-ENCODE`` function, as defined + in PKCS#1 v2.1 (RFC3447, 9.2). + + ``EMSA-PKCS1-V1_5-ENCODE`` actually accepts the message ``M`` as input, + and hash it internally. Here, we expect that the message has already + been hashed instead. + + :Parameters: + hash : hash object + The hash object that holds the digest of the message being signed. + emLen : int + The length the final encoding must have, in bytes. + + :attention: the early standard (RFC2313) stated that ``DigestInfo`` + had to be BER-encoded. This means that old signatures + might have length tags in indefinite form, which + is not supported in DER. Such encoding cannot be + reproduced by this function. + + :attention: the same standard defined ``DigestAlgorithm`` to be + of ``AlgorithmIdentifier`` type, where the PARAMETERS + item is optional. Encodings for ``MD2/4/5`` without + ``PARAMETERS`` cannot be reproduced by this function. + + :Return: An ``emLen`` byte long string that encodes the hash. + """ + + # First, build the ASN.1 DER object DigestInfo: + # + # DigestInfo ::= SEQUENCE { + # digestAlgorithm AlgorithmIdentifier, + # digest OCTET STRING + # } + # + # where digestAlgorithm identifies the hash function and shall be an + # algorithm ID with an OID in the set PKCS1-v1-5DigestAlgorithms. + # + # PKCS1-v1-5DigestAlgorithms ALGORITHM-IDENTIFIER ::= { + # { OID id-md2 PARAMETERS NULL }| + # { OID id-md5 PARAMETERS NULL }| + # { OID id-sha1 PARAMETERS NULL }| + # { OID id-sha256 PARAMETERS NULL }| + # { OID id-sha384 PARAMETERS NULL }| + # { OID id-sha512 PARAMETERS NULL } + # } + # + digestAlgo = DerSequence([hash.oid, DerNull().encode()]) + digest = DerOctetString(hash.digest()) + digestInfo = DerSequence([ + digestAlgo.encode(), + digest.encode() + ]).encode() + + # We need at least 11 bytes for the remaining data: 3 fixed bytes and + # at least 8 bytes of padding). + if emLen<len(digestInfo)+11: + raise ValueError("Selected hash algorith has a too long digest (%d bytes)." % len(digest)) + PS = bchr(0xFF) * (emLen - len(digestInfo) - 3) + return b("\x00\x01") + PS + bchr(0x00) + digestInfo + +def new(key): + """Return a signature scheme object `PKCS115_SigScheme` that + can be used to perform PKCS#1 v1.5 signature or verification. + + :Parameters: + key : RSA key object + The key to use to sign or verify the message. This is a `Crypto.PublicKey.RSA` object. + Signing is only possible if *key* is a private RSA key. + + """ + return PKCS115_SigScheme(key) + diff --git a/frozen_deps/Crypto/Signature/__init__.py b/frozen_deps/Crypto/Signature/__init__.py new file mode 100644 index 0000000..ed523b4 --- /dev/null +++ b/frozen_deps/Crypto/Signature/__init__.py @@ -0,0 +1,31 @@ +# -*- coding: utf-8 -*- +# +# =================================================================== +# The contents of this file are dedicated to the public domain. To +# the extent that dedication to the public domain is not available, +# everyone is granted a worldwide, perpetual, royalty-free, +# non-exclusive license to exercise all rights associated with the +# contents of this file for any purpose whatsoever. +# No rights are reserved. +# +# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, +# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND +# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS +# BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN +# ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN +# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +# SOFTWARE. +# =================================================================== + +"""Digital signature protocols + +A collection of standardized protocols to carry out digital signatures. + +:undocumented: __revision__, __package__ +""" + +__all__ = [ 'PKCS1_v1_5', 'PKCS1_PSS' ] +__revision__ = "$Id$" + + diff --git a/frozen_deps/Crypto/Util/Counter.py b/frozen_deps/Crypto/Util/Counter.py new file mode 100644 index 0000000..f0460e5 --- /dev/null +++ b/frozen_deps/Crypto/Util/Counter.py @@ -0,0 +1,127 @@ +# -*- coding: ascii -*- +# +# Util/Counter.py : Fast counter for use with CTR-mode ciphers +# +# Written in 2008 by Dwayne C. Litzenberger <[email protected]> +# +# =================================================================== +# The contents of this file are dedicated to the public domain. To +# the extent that dedication to the public domain is not available, +# everyone is granted a worldwide, perpetual, royalty-free, +# non-exclusive license to exercise all rights associated with the +# contents of this file for any purpose whatsoever. +# No rights are reserved. +# +# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, +# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND +# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS +# BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN +# ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN +# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +# SOFTWARE. +# =================================================================== +"""Fast counter functions for CTR cipher modes. + +CTR is a chaining mode for symmetric block encryption or decryption. +Messages are divideded into blocks, and the cipher operation takes +place on each block using the secret key and a unique *counter block*. + +The most straightforward way to fulfil the uniqueness property is +to start with an initial, random *counter block* value, and increment it as +the next block is processed. + +The block ciphers from `Crypto.Cipher` (when configured in *MODE_CTR* mode) +invoke a callable object (the *counter* parameter) to get the next *counter block*. +Unfortunately, the Python calling protocol leads to major performance degradations. + +The counter functions instantiated by this module will be invoked directly +by the ciphers in `Crypto.Cipher`. The fact that the Python layer is bypassed +lead to more efficient (and faster) execution of CTR cipher modes. + +An example of usage is the following: + + >>> from Crypto.Cipher import AES + >>> from Crypto.Util import Counter + >>> + >>> pt = b'\x00'*1000000 + >>> ctr = Counter.new(128) + >>> cipher = AES.new(b'\x00'*16, AES.MODE_CTR, counter=ctr) + >>> ct = cipher.encrypt(pt) + +:undocumented: __package__ +""" +import sys +if sys.version_info[0] == 2 and sys.version_info[1] == 1: + from Crypto.Util.py21compat import * +from Crypto.Util.py3compat import * + +from Crypto.Util import _counter +import struct + +# Factory function +def new(nbits, prefix=b(""), suffix=b(""), initial_value=1, overflow=0, little_endian=False, allow_wraparound=False, disable_shortcut=False): + """Create a stateful counter block function suitable for CTR encryption modes. + + Each call to the function returns the next counter block. + Each counter block is made up by three parts:: + + prefix || counter value || postfix + + The counter value is incremented by one at each call. + + :Parameters: + nbits : integer + Length of the desired counter, in bits. It must be a multiple of 8. + prefix : byte string + The constant prefix of the counter block. By default, no prefix is + used. + suffix : byte string + The constant postfix of the counter block. By default, no suffix is + used. + initial_value : integer + The initial value of the counter. Default value is 1. + little_endian : boolean + If True, the counter number will be encoded in little endian format. + If False (default), in big endian format. + allow_wraparound : boolean + If True, the function will raise an *OverflowError* exception as soon + as the counter wraps around. If False (default), the counter will + simply restart from zero. + disable_shortcut : boolean + If True, do not make ciphers from `Crypto.Cipher` bypass the Python + layer when invoking the counter block function. + If False (default), bypass the Python layer. + :Returns: + The counter block function. + """ + + # Sanity-check the message size + (nbytes, remainder) = divmod(nbits, 8) + if remainder != 0: + # In the future, we might support arbitrary bit lengths, but for now we don't. + raise ValueError("nbits must be a multiple of 8; got %d" % (nbits,)) + if nbytes < 1: + raise ValueError("nbits too small") + elif nbytes > 0xffff: + raise ValueError("nbits too large") + + initval = _encode(initial_value, nbytes, little_endian) + + if little_endian: + return _counter._newLE(bstr(prefix), bstr(suffix), initval, allow_wraparound=allow_wraparound, disable_shortcut=disable_shortcut) + else: + return _counter._newBE(bstr(prefix), bstr(suffix), initval, allow_wraparound=allow_wraparound, disable_shortcut=disable_shortcut) + +def _encode(n, nbytes, little_endian=False): + retval = [] + n = int(n) + for i in range(nbytes): + if little_endian: + retval.append(bchr(n & 0xff)) + else: + retval.insert(0, bchr(n & 0xff)) + n >>= 8 + return b("").join(retval) + +# vim:set ts=4 sw=4 sts=4 expandtab: diff --git a/frozen_deps/Crypto/Util/RFC1751.py b/frozen_deps/Crypto/Util/RFC1751.py new file mode 100644 index 0000000..1c10c4a --- /dev/null +++ b/frozen_deps/Crypto/Util/RFC1751.py @@ -0,0 +1,365 @@ +# rfc1751.py : Converts between 128-bit strings and a human-readable +# sequence of words, as defined in RFC1751: "A Convention for +# Human-Readable 128-bit Keys", by Daniel L. McDonald. +# +# Part of the Python Cryptography Toolkit +# +# Written by Andrew M. Kuchling and others +# +# =================================================================== +# The contents of this file are dedicated to the public domain. To +# the extent that dedication to the public domain is not available, +# everyone is granted a worldwide, perpetual, royalty-free, +# non-exclusive license to exercise all rights associated with the +# contents of this file for any purpose whatsoever. +# No rights are reserved. +# +# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, +# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND +# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS +# BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN +# ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN +# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +# SOFTWARE. +# =================================================================== + +__revision__ = "$Id$" + + +import binascii +from Crypto.Util.py3compat import * +from functools import reduce + +binary={0:'0000', 1:'0001', 2:'0010', 3:'0011', 4:'0100', 5:'0101', + 6:'0110', 7:'0111', 8:'1000', 9:'1001', 10:'1010', 11:'1011', + 12:'1100', 13:'1101', 14:'1110', 15:'1111'} + +def _key2bin(s): + "Convert a key into a string of binary digits" + kl=[bord(x) for x in s] + kl=[binary[x>>4]+binary[x&15] for x in kl] + return ''.join(kl) + +def _extract(key, start, length): + """Extract a bitstring(2.x)/bytestring(2.x) from a string of binary digits, and return its + numeric value.""" + k=key[start:start+length] + return reduce(lambda x,y: x*2+ord(y)-48, k, 0) + +def key_to_english (key): + """key_to_english(key:string(2.x)/bytes(3.x)) : string + Transform an arbitrary key into a string containing English words. + The key length must be a multiple of 8. + """ + english='' + for index in range(0, len(key), 8): # Loop over 8-byte subkeys + subkey=key[index:index+8] + # Compute the parity of the key + skbin=_key2bin(subkey) ; p=0 + for i in range(0, 64, 2): p=p+_extract(skbin, i, 2) + # Append parity bits to the subkey + skbin=_key2bin(subkey+bchr((p<<6) & 255)) + for i in range(0, 64, 11): + english=english+wordlist[_extract(skbin, i, 11)]+' ' + + return english[:-1] # Remove the trailing space + +def english_to_key (s): + """english_to_key(string):string(2.x)/bytes(2.x) + Transform a string into a corresponding key. + The string must contain words separated by whitespace; the number + of words must be a multiple of 6. + """ + + L=s.upper().split() ; key=b('') + for index in range(0, len(L), 6): + sublist=L[index:index+6] ; char=9*[0] ; bits=0 + for i in sublist: + index = wordlist.index(i) + shift = (8-(bits+11)%8) %8 + y = index << shift + cl, cc, cr = (y>>16), (y>>8)&0xff, y & 0xff + if (shift>5): + char[bits>>3] = char[bits>>3] | cl + char[(bits>>3)+1] = char[(bits>>3)+1] | cc + char[(bits>>3)+2] = char[(bits>>3)+2] | cr + elif shift>-3: + char[bits>>3] = char[bits>>3] | cc + char[(bits>>3)+1] = char[(bits>>3)+1] | cr + else: char[bits>>3] = char[bits>>3] | cr + bits=bits+11 + subkey=reduce(lambda x,y:x+bchr(y), char, b('')) + + # Check the parity of the resulting key + skbin=_key2bin(subkey) + p=0 + for i in range(0, 64, 2): p=p+_extract(skbin, i, 2) + if (p&3) != _extract(skbin, 64, 2): + raise ValueError("Parity error in resulting key") + key=key+subkey[0:8] + return key + +wordlist=[ "A", "ABE", "ACE", "ACT", "AD", "ADA", "ADD", + "AGO", "AID", "AIM", "AIR", "ALL", "ALP", "AM", "AMY", "AN", "ANA", + "AND", "ANN", "ANT", "ANY", "APE", "APS", "APT", "ARC", "ARE", "ARK", + "ARM", "ART", "AS", "ASH", "ASK", "AT", "ATE", "AUG", "AUK", "AVE", + "AWE", "AWK", "AWL", "AWN", "AX", "AYE", "BAD", "BAG", "BAH", "BAM", + "BAN", "BAR", "BAT", "BAY", "BE", "BED", "BEE", "BEG", "BEN", "BET", + "BEY", "BIB", "BID", "BIG", "BIN", "BIT", "BOB", "BOG", "BON", "BOO", + "BOP", "BOW", "BOY", "BUB", "BUD", "BUG", "BUM", "BUN", "BUS", "BUT", + "BUY", "BY", "BYE", "CAB", "CAL", "CAM", "CAN", "CAP", "CAR", "CAT", + "CAW", "COD", "COG", "COL", "CON", "COO", "COP", "COT", "COW", "COY", + "CRY", "CUB", "CUE", "CUP", "CUR", "CUT", "DAB", "DAD", "DAM", "DAN", + "DAR", "DAY", "DEE", "DEL", "DEN", "DES", "DEW", "DID", "DIE", "DIG", + "DIN", "DIP", "DO", "DOE", "DOG", "DON", "DOT", "DOW", "DRY", "DUB", + "DUD", "DUE", "DUG", "DUN", "EAR", "EAT", "ED", "EEL", "EGG", "EGO", + "ELI", "ELK", "ELM", "ELY", "EM", "END", "EST", "ETC", "EVA", "EVE", + "EWE", "EYE", "FAD", "FAN", "FAR", "FAT", "FAY", "FED", "FEE", "FEW", + "FIB", "FIG", "FIN", "FIR", "FIT", "FLO", "FLY", "FOE", "FOG", "FOR", + "FRY", "FUM", "FUN", "FUR", "GAB", "GAD", "GAG", "GAL", "GAM", "GAP", + "GAS", "GAY", "GEE", "GEL", "GEM", "GET", "GIG", "GIL", "GIN", "GO", + "GOT", "GUM", "GUN", "GUS", "GUT", "GUY", "GYM", "GYP", "HA", "HAD", + "HAL", "HAM", "HAN", "HAP", "HAS", "HAT", "HAW", "HAY", "HE", "HEM", + "HEN", "HER", "HEW", "HEY", "HI", "HID", "HIM", "HIP", "HIS", "HIT", + "HO", "HOB", "HOC", "HOE", "HOG", "HOP", "HOT", "HOW", "HUB", "HUE", + "HUG", "HUH", "HUM", "HUT", "I", "ICY", "IDA", "IF", "IKE", "ILL", + "INK", "INN", "IO", "ION", "IQ", "IRA", "IRE", "IRK", "IS", "IT", + "ITS", "IVY", "JAB", "JAG", "JAM", "JAN", "JAR", "JAW", "JAY", "JET", + "JIG", "JIM", "JO", "JOB", "JOE", "JOG", "JOT", "JOY", "JUG", "JUT", + "KAY", "KEG", "KEN", "KEY", "KID", "KIM", "KIN", "KIT", "LA", "LAB", + "LAC", "LAD", "LAG", "LAM", "LAP", "LAW", "LAY", "LEA", "LED", "LEE", + "LEG", "LEN", "LEO", "LET", "LEW", "LID", "LIE", "LIN", "LIP", "LIT", + "LO", "LOB", "LOG", "LOP", "LOS", "LOT", "LOU", "LOW", "LOY", "LUG", + "LYE", "MA", "MAC", "MAD", "MAE", "MAN", "MAO", "MAP", "MAT", "MAW", + "MAY", "ME", "MEG", "MEL", "MEN", "MET", "MEW", "MID", "MIN", "MIT", + "MOB", "MOD", "MOE", "MOO", "MOP", "MOS", "MOT", "MOW", "MUD", "MUG", + "MUM", "MY", "NAB", "NAG", "NAN", "NAP", "NAT", "NAY", "NE", "NED", + "NEE", "NET", "NEW", "NIB", "NIL", "NIP", "NIT", "NO", "NOB", "NOD", + "NON", "NOR", "NOT", "NOV", "NOW", "NU", "NUN", "NUT", "O", "OAF", + "OAK", "OAR", "OAT", "ODD", "ODE", "OF", "OFF", "OFT", "OH", "OIL", + "OK", "OLD", "ON", "ONE", "OR", "ORB", "ORE", "ORR", "OS", "OTT", + "OUR", "OUT", "OVA", "OW", "OWE", "OWL", "OWN", "OX", "PA", "PAD", + "PAL", "PAM", "PAN", "PAP", "PAR", "PAT", "PAW", "PAY", "PEA", "PEG", + "PEN", "PEP", "PER", "PET", "PEW", "PHI", "PI", "PIE", "PIN", "PIT", + "PLY", "PO", "POD", "POE", "POP", "POT", "POW", "PRO", "PRY", "PUB", + "PUG", "PUN", "PUP", "PUT", "QUO", "RAG", "RAM", "RAN", "RAP", "RAT", + "RAW", "RAY", "REB", "RED", "REP", "RET", "RIB", "RID", "RIG", "RIM", + "RIO", "RIP", "ROB", "ROD", "ROE", "RON", "ROT", "ROW", "ROY", "RUB", + "RUE", "RUG", "RUM", "RUN", "RYE", "SAC", "SAD", "SAG", "SAL", "SAM", + "SAN", "SAP", "SAT", "SAW", "SAY", "SEA", "SEC", "SEE", "SEN", "SET", + "SEW", "SHE", "SHY", "SIN", "SIP", "SIR", "SIS", "SIT", "SKI", "SKY", + "SLY", "SO", "SOB", "SOD", "SON", "SOP", "SOW", "SOY", "SPA", "SPY", + "SUB", "SUD", "SUE", "SUM", "SUN", "SUP", "TAB", "TAD", "TAG", "TAN", + "TAP", "TAR", "TEA", "TED", "TEE", "TEN", "THE", "THY", "TIC", "TIE", + "TIM", "TIN", "TIP", "TO", "TOE", "TOG", "TOM", "TON", "TOO", "TOP", + "TOW", "TOY", "TRY", "TUB", "TUG", "TUM", "TUN", "TWO", "UN", "UP", + "US", "USE", "VAN", "VAT", "VET", "VIE", "WAD", "WAG", "WAR", "WAS", + "WAY", "WE", "WEB", "WED", "WEE", "WET", "WHO", "WHY", "WIN", "WIT", + "WOK", "WON", "WOO", "WOW", "WRY", "WU", "YAM", "YAP", "YAW", "YE", + "YEA", "YES", "YET", "YOU", "ABED", "ABEL", "ABET", "ABLE", "ABUT", + "ACHE", "ACID", "ACME", "ACRE", "ACTA", "ACTS", "ADAM", "ADDS", + "ADEN", "AFAR", "AFRO", "AGEE", "AHEM", "AHOY", "AIDA", "AIDE", + "AIDS", "AIRY", "AJAR", "AKIN", "ALAN", "ALEC", "ALGA", "ALIA", + "ALLY", "ALMA", "ALOE", "ALSO", "ALTO", "ALUM", "ALVA", "AMEN", + "AMES", "AMID", "AMMO", "AMOK", "AMOS", "AMRA", "ANDY", "ANEW", + "ANNA", "ANNE", "ANTE", "ANTI", "AQUA", "ARAB", "ARCH", "AREA", + "ARGO", "ARID", "ARMY", "ARTS", "ARTY", "ASIA", "ASKS", "ATOM", + "AUNT", "AURA", "AUTO", "AVER", "AVID", "AVIS", "AVON", "AVOW", + "AWAY", "AWRY", "BABE", "BABY", "BACH", "BACK", "BADE", "BAIL", + "BAIT", "BAKE", "BALD", "BALE", "BALI", "BALK", "BALL", "BALM", + "BAND", "BANE", "BANG", "BANK", "BARB", "BARD", "BARE", "BARK", + "BARN", "BARR", "BASE", "BASH", "BASK", "BASS", "BATE", "BATH", + "BAWD", "BAWL", "BEAD", "BEAK", "BEAM", "BEAN", "BEAR", "BEAT", + "BEAU", "BECK", "BEEF", "BEEN", "BEER", + "BEET", "BELA", "BELL", "BELT", "BEND", "BENT", "BERG", "BERN", + "BERT", "BESS", "BEST", "BETA", "BETH", "BHOY", "BIAS", "BIDE", + "BIEN", "BILE", "BILK", "BILL", "BIND", "BING", "BIRD", "BITE", + "BITS", "BLAB", "BLAT", "BLED", "BLEW", "BLOB", "BLOC", "BLOT", + "BLOW", "BLUE", "BLUM", "BLUR", "BOAR", "BOAT", "BOCA", "BOCK", + "BODE", "BODY", "BOGY", "BOHR", "BOIL", "BOLD", "BOLO", "BOLT", + "BOMB", "BONA", "BOND", "BONE", "BONG", "BONN", "BONY", "BOOK", + "BOOM", "BOON", "BOOT", "BORE", "BORG", "BORN", "BOSE", "BOSS", + "BOTH", "BOUT", "BOWL", "BOYD", "BRAD", "BRAE", "BRAG", "BRAN", + "BRAY", "BRED", "BREW", "BRIG", "BRIM", "BROW", "BUCK", "BUDD", + "BUFF", "BULB", "BULK", "BULL", "BUNK", "BUNT", "BUOY", "BURG", + "BURL", "BURN", "BURR", "BURT", "BURY", "BUSH", "BUSS", "BUST", + "BUSY", "BYTE", "CADY", "CAFE", "CAGE", "CAIN", "CAKE", "CALF", + "CALL", "CALM", "CAME", "CANE", "CANT", "CARD", "CARE", "CARL", + "CARR", "CART", "CASE", "CASH", "CASK", "CAST", "CAVE", "CEIL", + "CELL", "CENT", "CERN", "CHAD", "CHAR", "CHAT", "CHAW", "CHEF", + "CHEN", "CHEW", "CHIC", "CHIN", "CHOU", "CHOW", "CHUB", "CHUG", + "CHUM", "CITE", "CITY", "CLAD", "CLAM", "CLAN", "CLAW", "CLAY", + "CLOD", "CLOG", "CLOT", "CLUB", "CLUE", "COAL", "COAT", "COCA", + "COCK", "COCO", "CODA", "CODE", "CODY", "COED", "COIL", "COIN", + "COKE", "COLA", "COLD", "COLT", "COMA", "COMB", "COME", "COOK", + "COOL", "COON", "COOT", "CORD", "CORE", "CORK", "CORN", "COST", + "COVE", "COWL", "CRAB", "CRAG", "CRAM", "CRAY", "CREW", "CRIB", + "CROW", "CRUD", "CUBA", "CUBE", "CUFF", "CULL", "CULT", "CUNY", + "CURB", "CURD", "CURE", "CURL", "CURT", "CUTS", "DADE", "DALE", + "DAME", "DANA", "DANE", "DANG", "DANK", "DARE", "DARK", "DARN", + "DART", "DASH", "DATA", "DATE", "DAVE", "DAVY", "DAWN", "DAYS", + "DEAD", "DEAF", "DEAL", "DEAN", "DEAR", "DEBT", "DECK", "DEED", + "DEEM", "DEER", "DEFT", "DEFY", "DELL", "DENT", "DENY", "DESK", + "DIAL", "DICE", "DIED", "DIET", "DIME", "DINE", "DING", "DINT", + "DIRE", "DIRT", "DISC", "DISH", "DISK", "DIVE", "DOCK", "DOES", + "DOLE", "DOLL", "DOLT", "DOME", "DONE", "DOOM", "DOOR", "DORA", + "DOSE", "DOTE", "DOUG", "DOUR", "DOVE", "DOWN", "DRAB", "DRAG", + "DRAM", "DRAW", "DREW", "DRUB", "DRUG", "DRUM", "DUAL", "DUCK", + "DUCT", "DUEL", "DUET", "DUKE", "DULL", "DUMB", "DUNE", "DUNK", + "DUSK", "DUST", "DUTY", "EACH", "EARL", "EARN", "EASE", "EAST", + "EASY", "EBEN", "ECHO", "EDDY", "EDEN", "EDGE", "EDGY", "EDIT", + "EDNA", "EGAN", "ELAN", "ELBA", "ELLA", "ELSE", "EMIL", "EMIT", + "EMMA", "ENDS", "ERIC", "EROS", "EVEN", "EVER", "EVIL", "EYED", + "FACE", "FACT", "FADE", "FAIL", "FAIN", "FAIR", "FAKE", "FALL", + "FAME", "FANG", "FARM", "FAST", "FATE", "FAWN", "FEAR", "FEAT", + "FEED", "FEEL", "FEET", "FELL", "FELT", "FEND", "FERN", "FEST", + "FEUD", "FIEF", "FIGS", "FILE", "FILL", "FILM", "FIND", "FINE", + "FINK", "FIRE", "FIRM", "FISH", "FISK", "FIST", "FITS", "FIVE", + "FLAG", "FLAK", "FLAM", "FLAT", "FLAW", "FLEA", "FLED", "FLEW", + "FLIT", "FLOC", "FLOG", "FLOW", "FLUB", "FLUE", "FOAL", "FOAM", + "FOGY", "FOIL", "FOLD", "FOLK", "FOND", "FONT", "FOOD", "FOOL", + "FOOT", "FORD", "FORE", "FORK", "FORM", "FORT", "FOSS", "FOUL", + "FOUR", "FOWL", "FRAU", "FRAY", "FRED", "FREE", "FRET", "FREY", + "FROG", "FROM", "FUEL", "FULL", "FUME", "FUND", "FUNK", "FURY", + "FUSE", "FUSS", "GAFF", "GAGE", "GAIL", "GAIN", "GAIT", "GALA", + "GALE", "GALL", "GALT", "GAME", "GANG", "GARB", "GARY", "GASH", + "GATE", "GAUL", "GAUR", "GAVE", "GAWK", "GEAR", "GELD", "GENE", + "GENT", "GERM", "GETS", "GIBE", "GIFT", "GILD", "GILL", "GILT", + "GINA", "GIRD", "GIRL", "GIST", "GIVE", "GLAD", "GLEE", "GLEN", + "GLIB", "GLOB", "GLOM", "GLOW", "GLUE", "GLUM", "GLUT", "GOAD", + "GOAL", "GOAT", "GOER", "GOES", "GOLD", "GOLF", "GONE", "GONG", + "GOOD", "GOOF", "GORE", "GORY", "GOSH", "GOUT", "GOWN", "GRAB", + "GRAD", "GRAY", "GREG", "GREW", "GREY", "GRID", "GRIM", "GRIN", + "GRIT", "GROW", "GRUB", "GULF", "GULL", "GUNK", "GURU", "GUSH", + "GUST", "GWEN", "GWYN", "HAAG", "HAAS", "HACK", "HAIL", "HAIR", + "HALE", "HALF", "HALL", "HALO", "HALT", "HAND", "HANG", "HANK", + "HANS", "HARD", "HARK", "HARM", "HART", "HASH", "HAST", "HATE", + "HATH", "HAUL", "HAVE", "HAWK", "HAYS", "HEAD", "HEAL", "HEAR", + "HEAT", "HEBE", "HECK", "HEED", "HEEL", "HEFT", "HELD", "HELL", + "HELM", "HERB", "HERD", "HERE", "HERO", "HERS", "HESS", "HEWN", + "HICK", "HIDE", "HIGH", "HIKE", "HILL", "HILT", "HIND", "HINT", + "HIRE", "HISS", "HIVE", "HOBO", "HOCK", "HOFF", "HOLD", "HOLE", + "HOLM", "HOLT", "HOME", "HONE", "HONK", "HOOD", "HOOF", "HOOK", + "HOOT", "HORN", "HOSE", "HOST", "HOUR", "HOVE", "HOWE", "HOWL", + "HOYT", "HUCK", "HUED", "HUFF", "HUGE", "HUGH", "HUGO", "HULK", + "HULL", "HUNK", "HUNT", "HURD", "HURL", "HURT", "HUSH", "HYDE", + "HYMN", "IBIS", "ICON", "IDEA", "IDLE", "IFFY", "INCA", "INCH", + "INTO", "IONS", "IOTA", "IOWA", "IRIS", "IRMA", "IRON", "ISLE", + "ITCH", "ITEM", "IVAN", "JACK", "JADE", "JAIL", "JAKE", "JANE", + "JAVA", "JEAN", "JEFF", "JERK", "JESS", "JEST", "JIBE", "JILL", + "JILT", "JIVE", "JOAN", "JOBS", "JOCK", "JOEL", "JOEY", "JOHN", + "JOIN", "JOKE", "JOLT", "JOVE", "JUDD", "JUDE", "JUDO", "JUDY", + "JUJU", "JUKE", "JULY", "JUNE", "JUNK", "JUNO", "JURY", "JUST", + "JUTE", "KAHN", "KALE", "KANE", "KANT", "KARL", "KATE", "KEEL", + "KEEN", "KENO", "KENT", "KERN", "KERR", "KEYS", "KICK", "KILL", + "KIND", "KING", "KIRK", "KISS", "KITE", "KLAN", "KNEE", "KNEW", + "KNIT", "KNOB", "KNOT", "KNOW", "KOCH", "KONG", "KUDO", "KURD", + "KURT", "KYLE", "LACE", "LACK", "LACY", "LADY", "LAID", "LAIN", + "LAIR", "LAKE", "LAMB", "LAME", "LAND", "LANE", "LANG", "LARD", + "LARK", "LASS", "LAST", "LATE", "LAUD", "LAVA", "LAWN", "LAWS", + "LAYS", "LEAD", "LEAF", "LEAK", "LEAN", "LEAR", "LEEK", "LEER", + "LEFT", "LEND", "LENS", "LENT", "LEON", "LESK", "LESS", "LEST", + "LETS", "LIAR", "LICE", "LICK", "LIED", "LIEN", "LIES", "LIEU", + "LIFE", "LIFT", "LIKE", "LILA", "LILT", "LILY", "LIMA", "LIMB", + "LIME", "LIND", "LINE", "LINK", "LINT", "LION", "LISA", "LIST", + "LIVE", "LOAD", "LOAF", "LOAM", "LOAN", "LOCK", "LOFT", "LOGE", + "LOIS", "LOLA", "LONE", "LONG", "LOOK", "LOON", "LOOT", "LORD", + "LORE", "LOSE", "LOSS", "LOST", "LOUD", "LOVE", "LOWE", "LUCK", + "LUCY", "LUGE", "LUKE", "LULU", "LUND", "LUNG", "LURA", "LURE", + "LURK", "LUSH", "LUST", "LYLE", "LYNN", "LYON", "LYRA", "MACE", + "MADE", "MAGI", "MAID", "MAIL", "MAIN", "MAKE", "MALE", "MALI", + "MALL", "MALT", "MANA", "MANN", "MANY", "MARC", "MARE", "MARK", + "MARS", "MART", "MARY", "MASH", "MASK", "MASS", "MAST", "MATE", + "MATH", "MAUL", "MAYO", "MEAD", "MEAL", "MEAN", "MEAT", "MEEK", + "MEET", "MELD", "MELT", "MEMO", "MEND", "MENU", "MERT", "MESH", + "MESS", "MICE", "MIKE", "MILD", "MILE", "MILK", "MILL", "MILT", + "MIMI", "MIND", "MINE", "MINI", "MINK", "MINT", "MIRE", "MISS", + "MIST", "MITE", "MITT", "MOAN", "MOAT", "MOCK", "MODE", "MOLD", + "MOLE", "MOLL", "MOLT", "MONA", "MONK", "MONT", "MOOD", "MOON", + "MOOR", "MOOT", "MORE", "MORN", "MORT", "MOSS", "MOST", "MOTH", + "MOVE", "MUCH", "MUCK", "MUDD", "MUFF", "MULE", "MULL", "MURK", + "MUSH", "MUST", "MUTE", "MUTT", "MYRA", "MYTH", "NAGY", "NAIL", + "NAIR", "NAME", "NARY", "NASH", "NAVE", "NAVY", "NEAL", "NEAR", + "NEAT", "NECK", "NEED", "NEIL", "NELL", "NEON", "NERO", "NESS", + "NEST", "NEWS", "NEWT", "NIBS", "NICE", "NICK", "NILE", "NINA", + "NINE", "NOAH", "NODE", "NOEL", "NOLL", "NONE", "NOOK", "NOON", + "NORM", "NOSE", "NOTE", "NOUN", "NOVA", "NUDE", "NULL", "NUMB", + "OATH", "OBEY", "OBOE", "ODIN", "OHIO", "OILY", "OINT", "OKAY", + "OLAF", "OLDY", "OLGA", "OLIN", "OMAN", "OMEN", "OMIT", "ONCE", + "ONES", "ONLY", "ONTO", "ONUS", "ORAL", "ORGY", "OSLO", "OTIS", + "OTTO", "OUCH", "OUST", "OUTS", "OVAL", "OVEN", "OVER", "OWLY", + "OWNS", "QUAD", "QUIT", "QUOD", "RACE", "RACK", "RACY", "RAFT", + "RAGE", "RAID", "RAIL", "RAIN", "RAKE", "RANK", "RANT", "RARE", + "RASH", "RATE", "RAVE", "RAYS", "READ", "REAL", "REAM", "REAR", + "RECK", "REED", "REEF", "REEK", "REEL", "REID", "REIN", "RENA", + "REND", "RENT", "REST", "RICE", "RICH", "RICK", "RIDE", "RIFT", + "RILL", "RIME", "RING", "RINK", "RISE", "RISK", "RITE", "ROAD", + "ROAM", "ROAR", "ROBE", "ROCK", "RODE", "ROIL", "ROLL", "ROME", + "ROOD", "ROOF", "ROOK", "ROOM", "ROOT", "ROSA", "ROSE", "ROSS", + "ROSY", "ROTH", "ROUT", "ROVE", "ROWE", "ROWS", "RUBE", "RUBY", + "RUDE", "RUDY", "RUIN", "RULE", "RUNG", "RUNS", "RUNT", "RUSE", + "RUSH", "RUSK", "RUSS", "RUST", "RUTH", "SACK", "SAFE", "SAGE", + "SAID", "SAIL", "SALE", "SALK", "SALT", "SAME", "SAND", "SANE", + "SANG", "SANK", "SARA", "SAUL", "SAVE", "SAYS", "SCAN", "SCAR", + "SCAT", "SCOT", "SEAL", "SEAM", "SEAR", "SEAT", "SEED", "SEEK", + "SEEM", "SEEN", "SEES", "SELF", "SELL", "SEND", "SENT", "SETS", + "SEWN", "SHAG", "SHAM", "SHAW", "SHAY", "SHED", "SHIM", "SHIN", + "SHOD", "SHOE", "SHOT", "SHOW", "SHUN", "SHUT", "SICK", "SIDE", + "SIFT", "SIGH", "SIGN", "SILK", "SILL", "SILO", "SILT", "SINE", + "SING", "SINK", "SIRE", "SITE", "SITS", "SITU", "SKAT", "SKEW", + "SKID", "SKIM", "SKIN", "SKIT", "SLAB", "SLAM", "SLAT", "SLAY", + "SLED", "SLEW", "SLID", "SLIM", "SLIT", "SLOB", "SLOG", "SLOT", + "SLOW", "SLUG", "SLUM", "SLUR", "SMOG", "SMUG", "SNAG", "SNOB", + "SNOW", "SNUB", "SNUG", "SOAK", "SOAR", "SOCK", "SODA", "SOFA", + "SOFT", "SOIL", "SOLD", "SOME", "SONG", "SOON", "SOOT", "SORE", + "SORT", "SOUL", "SOUR", "SOWN", "STAB", "STAG", "STAN", "STAR", + "STAY", "STEM", "STEW", "STIR", "STOW", "STUB", "STUN", "SUCH", + "SUDS", "SUIT", "SULK", "SUMS", "SUNG", "SUNK", "SURE", "SURF", + "SWAB", "SWAG", "SWAM", "SWAN", "SWAT", "SWAY", "SWIM", "SWUM", + "TACK", "TACT", "TAIL", "TAKE", "TALE", "TALK", "TALL", "TANK", + "TASK", "TATE", "TAUT", "TEAL", "TEAM", "TEAR", "TECH", "TEEM", + "TEEN", "TEET", "TELL", "TEND", "TENT", "TERM", "TERN", "TESS", + "TEST", "THAN", "THAT", "THEE", "THEM", "THEN", "THEY", "THIN", + "THIS", "THUD", "THUG", "TICK", "TIDE", "TIDY", "TIED", "TIER", + "TILE", "TILL", "TILT", "TIME", "TINA", "TINE", "TINT", "TINY", + "TIRE", "TOAD", "TOGO", "TOIL", "TOLD", "TOLL", "TONE", "TONG", + "TONY", "TOOK", "TOOL", "TOOT", "TORE", "TORN", "TOTE", "TOUR", + "TOUT", "TOWN", "TRAG", "TRAM", "TRAY", "TREE", "TREK", "TRIG", + "TRIM", "TRIO", "TROD", "TROT", "TROY", "TRUE", "TUBA", "TUBE", + "TUCK", "TUFT", "TUNA", "TUNE", "TUNG", "TURF", "TURN", "TUSK", + "TWIG", "TWIN", "TWIT", "ULAN", "UNIT", "URGE", "USED", "USER", + "USES", "UTAH", "VAIL", "VAIN", "VALE", "VARY", "VASE", "VAST", + "VEAL", "VEDA", "VEIL", "VEIN", "VEND", "VENT", "VERB", "VERY", + "VETO", "VICE", "VIEW", "VINE", "VISE", "VOID", "VOLT", "VOTE", + "WACK", "WADE", "WAGE", "WAIL", "WAIT", "WAKE", "WALE", "WALK", + "WALL", "WALT", "WAND", "WANE", "WANG", "WANT", "WARD", "WARM", + "WARN", "WART", "WASH", "WAST", "WATS", "WATT", "WAVE", "WAVY", + "WAYS", "WEAK", "WEAL", "WEAN", "WEAR", "WEED", "WEEK", "WEIR", + "WELD", "WELL", "WELT", "WENT", "WERE", "WERT", "WEST", "WHAM", + "WHAT", "WHEE", "WHEN", "WHET", "WHOA", "WHOM", "WICK", "WIFE", + "WILD", "WILL", "WIND", "WINE", "WING", "WINK", "WINO", "WIRE", + "WISE", "WISH", "WITH", "WOLF", "WONT", "WOOD", "WOOL", "WORD", + "WORE", "WORK", "WORM", "WORN", "WOVE", "WRIT", "WYNN", "YALE", + "YANG", "YANK", "YARD", "YARN", "YAWL", "YAWN", "YEAH", "YEAR", + "YELL", "YOGA", "YOKE" ] + +if __name__=='__main__': + data = [('EB33F77EE73D4053', 'TIDE ITCH SLOW REIN RULE MOT'), + ('CCAC2AED591056BE4F90FD441C534766', + 'RASH BUSH MILK LOOK BAD BRIM AVID GAFF BAIT ROT POD LOVE'), + ('EFF81F9BFBC65350920CDD7416DE8009', + 'TROD MUTE TAIL WARM CHAR KONG HAAG CITY BORE O TEAL AWL') + ] + + for key, words in data: + print('Trying key', key) + key=binascii.a2b_hex(key) + w2=key_to_english(key) + if w2!=words: + print('key_to_english fails on key', repr(key), ', producing', str(w2)) + k2=english_to_key(words) + if k2!=key: + print('english_to_key fails on key', repr(key), ', producing', repr(k2)) + + diff --git a/frozen_deps/Crypto/Util/__init__.py b/frozen_deps/Crypto/Util/__init__.py new file mode 100644 index 0000000..a3bef8a --- /dev/null +++ b/frozen_deps/Crypto/Util/__init__.py @@ -0,0 +1,37 @@ +# -*- coding: utf-8 -*- +# +# =================================================================== +# The contents of this file are dedicated to the public domain. To +# the extent that dedication to the public domain is not available, +# everyone is granted a worldwide, perpetual, royalty-free, +# non-exclusive license to exercise all rights associated with the +# contents of this file for any purpose whatsoever. +# No rights are reserved. +# +# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, +# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND +# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS +# BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN +# ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN +# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +# SOFTWARE. +# =================================================================== + +"""Miscellaneous modules + +Contains useful modules that don't belong into any of the +other Crypto.* subpackages. + +Crypto.Util.number Number-theoretic functions (primality testing, etc.) +Crypto.Util.randpool Random number generation +Crypto.Util.RFC1751 Converts between 128-bit keys and human-readable + strings of words. +Crypto.Util.asn1 Minimal support for ASN.1 DER encoding + +""" + +__all__ = ['randpool', 'RFC1751', 'number', 'strxor', 'asn1' ] + +__revision__ = "$Id$" + diff --git a/frozen_deps/Crypto/Util/_counter.cpython-38-x86_64-linux-gnu.so b/frozen_deps/Crypto/Util/_counter.cpython-38-x86_64-linux-gnu.so Binary files differnew file mode 100755 index 0000000..77cd132 --- /dev/null +++ b/frozen_deps/Crypto/Util/_counter.cpython-38-x86_64-linux-gnu.so diff --git a/frozen_deps/Crypto/Util/_number_new.py b/frozen_deps/Crypto/Util/_number_new.py new file mode 100644 index 0000000..5f29176 --- /dev/null +++ b/frozen_deps/Crypto/Util/_number_new.py @@ -0,0 +1,119 @@ +# -*- coding: ascii -*- +# +# Util/_number_new.py : utility functions +# +# Written in 2008 by Dwayne C. Litzenberger <[email protected]> +# +# =================================================================== +# The contents of this file are dedicated to the public domain. To +# the extent that dedication to the public domain is not available, +# everyone is granted a worldwide, perpetual, royalty-free, +# non-exclusive license to exercise all rights associated with the +# contents of this file for any purpose whatsoever. +# No rights are reserved. +# +# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, +# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND +# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS +# BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN +# ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN +# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +# SOFTWARE. +# =================================================================== + +## NOTE: Do not import this module directly. Import these functions from Crypto.Util.number. + +__revision__ = "$Id$" +__all__ = ['ceil_shift', 'ceil_div', 'floor_div', 'exact_log2', 'exact_div'] + +import sys +if sys.version_info[0] == 2 and sys.version_info[1] == 1: + from Crypto.Util.py21compat import * + +def ceil_shift(n, b): + """Return ceil(n / 2**b) without performing any floating-point or division operations. + + This is done by right-shifting n by b bits and incrementing the result by 1 + if any '1' bits were shifted out. + """ + if not isinstance(n, int) or not isinstance(b, int): + raise TypeError("unsupported operand type(s): %r and %r" % (type(n).__name__, type(b).__name__)) + + assert n >= 0 and b >= 0 # I haven't tested or even thought about negative values + mask = (1 << b) - 1 + if n & mask: + return (n >> b) + 1 + else: + return n >> b + +def ceil_div(a, b): + """Return ceil(a / b) without performing any floating-point operations.""" + + if not isinstance(a, int) or not isinstance(b, int): + raise TypeError("unsupported operand type(s): %r and %r" % (type(a).__name__, type(b).__name__)) + + (q, r) = divmod(a, b) + if r: + return q + 1 + else: + return q + +def floor_div(a, b): + if not isinstance(a, int) or not isinstance(b, int): + raise TypeError("unsupported operand type(s): %r and %r" % (type(a).__name__, type(b).__name__)) + + (q, r) = divmod(a, b) + return q + +def exact_log2(num): + """Find and return an integer i >= 0 such that num == 2**i. + + If no such integer exists, this function raises ValueError. + """ + + if not isinstance(num, int): + raise TypeError("unsupported operand type: %r" % (type(num).__name__,)) + + n = int(num) + if n <= 0: + raise ValueError("cannot compute logarithm of non-positive number") + + i = 0 + while n != 0: + if (n & 1) and n != 1: + raise ValueError("No solution could be found") + i += 1 + n >>= 1 + i -= 1 + + assert num == (1 << i) + return i + +def exact_div(p, d, allow_divzero=False): + """Find and return an integer n such that p == n * d + + If no such integer exists, this function raises ValueError. + + Both operands must be integers. + + If the second operand is zero, this function will raise ZeroDivisionError + unless allow_divzero is true (default: False). + """ + + if not isinstance(p, int) or not isinstance(d, int): + raise TypeError("unsupported operand type(s): %r and %r" % (type(p).__name__, type(d).__name__)) + + if d == 0 and allow_divzero: + n = 0 + if p != n * d: + raise ValueError("No solution could be found") + else: + (n, r) = divmod(p, d) + if r != 0: + raise ValueError("No solution could be found") + + assert p == n * d + return n + +# vim:set ts=4 sw=4 sts=4 expandtab: diff --git a/frozen_deps/Crypto/Util/asn1.py b/frozen_deps/Crypto/Util/asn1.py new file mode 100644 index 0000000..9a97d97 --- /dev/null +++ b/frozen_deps/Crypto/Util/asn1.py @@ -0,0 +1,286 @@ +# -*- coding: ascii -*- +# +# Util/asn1.py : Minimal support for ASN.1 DER binary encoding. +# +# =================================================================== +# The contents of this file are dedicated to the public domain. To +# the extent that dedication to the public domain is not available, +# everyone is granted a worldwide, perpetual, royalty-free, +# non-exclusive license to exercise all rights associated with the +# contents of this file for any purpose whatsoever. +# No rights are reserved. +# +# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, +# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND +# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS +# BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN +# ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN +# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +# SOFTWARE. +# =================================================================== + +from Crypto.Util.number import long_to_bytes, bytes_to_long +import sys +from Crypto.Util.py3compat import * + +__all__ = [ 'DerObject', 'DerInteger', 'DerOctetString', 'DerNull', 'DerSequence', 'DerObjectId' ] + +class DerObject: + """Base class for defining a single DER object. + + Instantiate this class ONLY when you have to decode a DER element. + """ + + # Known TAG types + typeTags = { 'SEQUENCE': 0x30, 'BIT STRING': 0x03, 'INTEGER': 0x02, + 'OCTET STRING': 0x04, 'NULL': 0x05, 'OBJECT IDENTIFIER': 0x06 } + + def __init__(self, ASN1Type=None, payload=b('')): + """Initialize the DER object according to a specific type. + + The ASN.1 type is either specified as the ASN.1 string (e.g. + 'SEQUENCE'), directly with its numerical tag or with no tag + at all (None).""" + if isInt(ASN1Type) or ASN1Type is None: + self.typeTag = ASN1Type + else: + if len(ASN1Type)==1: + self.typeTag = ord(ASN1Type) + else: + self.typeTag = self.typeTags.get(ASN1Type) + self.payload = payload + + def isType(self, ASN1Type): + return self.typeTags[ASN1Type]==self.typeTag + + def _lengthOctets(self, payloadLen): + """Return a byte string that encodes the given payload length (in + bytes) in a format suitable for a DER length tag (L). + """ + if payloadLen>127: + encoding = long_to_bytes(payloadLen) + return bchr(len(encoding)+128) + encoding + return bchr(payloadLen) + + def encode(self): + """Return a complete DER element, fully encoded as a TLV.""" + return bchr(self.typeTag) + self._lengthOctets(len(self.payload)) + self.payload + + def _decodeLen(self, idx, der): + """Given a (part of a) DER element, and an index to the first byte of + a DER length tag (L), return a tuple with the payload size, + and the index of the first byte of the such payload (V). + + Raises a ValueError exception if the DER length is invalid. + Raises an IndexError exception if the DER element is too short. + """ + length = bord(der[idx]) + if length<=127: + return (length,idx+1) + payloadLength = bytes_to_long(der[idx+1:idx+1+(length & 0x7F)]) + if payloadLength<=127: + raise ValueError("Not a DER length tag.") + return (payloadLength, idx+1+(length & 0x7F)) + + def decode(self, derEle, noLeftOvers=0): + """Decode a complete DER element, and re-initializes this + object with it. + + @param derEle A complete DER element. It must start with a DER T + tag. + @param noLeftOvers Indicate whether it is acceptable to complete the + parsing of the DER element and find that not all + bytes in derEle have been used. + @return Index of the first unused byte in the given DER element. + + Raises a ValueError exception in case of parsing errors. + Raises an IndexError exception if the DER element is too short. + """ + try: + self.typeTag = bord(derEle[0]) + if (self.typeTag & 0x1F)==0x1F: + raise ValueError("Unsupported DER tag") + (length,idx) = self._decodeLen(1, derEle) + if noLeftOvers and len(derEle) != (idx+length): + raise ValueError("Not a DER structure") + self.payload = derEle[idx:idx+length] + except IndexError: + raise ValueError("Not a valid DER SEQUENCE.") + return idx+length + +class DerInteger(DerObject): + def __init__(self, value = 0): + """Class to model an INTEGER DER element. + + Limitation: only non-negative values are supported. + """ + DerObject.__init__(self, 'INTEGER') + self.value = value + + def encode(self): + """Return a complete INTEGER DER element, fully encoded as a TLV.""" + self.payload = long_to_bytes(self.value) + if bord(self.payload[0])>127: + self.payload = bchr(0x00) + self.payload + return DerObject.encode(self) + + def decode(self, derEle, noLeftOvers=0): + """Decode a complete INTEGER DER element, and re-initializes this + object with it. + + @param derEle A complete INTEGER DER element. It must start with a DER + INTEGER tag. + @param noLeftOvers Indicate whether it is acceptable to complete the + parsing of the DER element and find that not all + bytes in derEle have been used. + @return Index of the first unused byte in the given DER element. + + Raises a ValueError exception if the DER element is not a + valid non-negative INTEGER. + Raises an IndexError exception if the DER element is too short. + """ + tlvLength = DerObject.decode(self, derEle, noLeftOvers) + if self.typeTag!=self.typeTags['INTEGER']: + raise ValueError ("Not a DER INTEGER.") + if bord(self.payload[0])>127: + raise ValueError ("Negative INTEGER.") + self.value = bytes_to_long(self.payload) + return tlvLength + +class DerSequence(DerObject): + """Class to model a SEQUENCE DER element. + + This object behave like a dynamic Python sequence. + Sub-elements that are INTEGERs, look like Python integers. + Any other sub-element is a binary string encoded as the complete DER + sub-element (TLV). + """ + + def __init__(self, startSeq=None): + """Initialize the SEQUENCE DER object. Always empty + initially.""" + DerObject.__init__(self, 'SEQUENCE') + if startSeq==None: + self._seq = [] + else: + self._seq = startSeq + + ## A few methods to make it behave like a python sequence + + def __delitem__(self, n): + del self._seq[n] + def __getitem__(self, n): + return self._seq[n] + def __setitem__(self, key, value): + self._seq[key] = value + def __setslice__(self,i,j,sequence): + self._seq[i:j] = sequence + def __delslice__(self,i,j): + del self._seq[i:j] + def __getslice__(self, i, j): + return self._seq[max(0, i):max(0, j)] + def __len__(self): + return len(self._seq) + def append(self, item): + return self._seq.append(item) + + def hasInts(self): + """Return the number of items in this sequence that are numbers.""" + return len(list(filter(isInt, self._seq))) + + def hasOnlyInts(self): + """Return True if all items in this sequence are numbers.""" + return self._seq and self.hasInts()==len(self._seq) + + def encode(self): + """Return the DER encoding for the ASN.1 SEQUENCE, containing + the non-negative integers and longs added to this object. + + Limitation: Raises a ValueError exception if it some elements + in the sequence are neither Python integers nor complete DER INTEGERs. + """ + self.payload = b('') + for item in self._seq: + try: + self.payload += item + except: + try: + self.payload += DerInteger(item).encode() + except: + raise ValueError("Trying to DER encode an unknown object") + return DerObject.encode(self) + + def decode(self, derEle, noLeftOvers=0): + """Decode a complete SEQUENCE DER element, and re-initializes this + object with it. + + @param derEle A complete SEQUENCE DER element. It must start with a DER + SEQUENCE tag. + @param noLeftOvers Indicate whether it is acceptable to complete the + parsing of the DER element and find that not all + bytes in derEle have been used. + @return Index of the first unused byte in the given DER element. + + DER INTEGERs are decoded into Python integers. Any other DER + element is not decoded. Its validity is not checked. + + Raises a ValueError exception if the DER element is not a + valid DER SEQUENCE. + Raises an IndexError exception if the DER element is too short. + """ + + self._seq = [] + try: + tlvLength = DerObject.decode(self, derEle, noLeftOvers) + if self.typeTag!=self.typeTags['SEQUENCE']: + raise ValueError("Not a DER SEQUENCE.") + # Scan one TLV at once + idx = 0 + while idx<len(self.payload): + typeTag = bord(self.payload[idx]) + if typeTag==self.typeTags['INTEGER']: + newInteger = DerInteger() + idx += newInteger.decode(self.payload[idx:]) + self._seq.append(newInteger.value) + else: + itemLen,itemIdx = self._decodeLen(idx+1,self.payload) + self._seq.append(self.payload[idx:itemIdx+itemLen]) + idx = itemIdx + itemLen + except IndexError: + raise ValueError("Not a valid DER SEQUENCE.") + return tlvLength + +class DerOctetString(DerObject): + def __init__(self, value = b('')): + DerObject.__init__(self, 'OCTET STRING') + self.payload = value + + def decode(self, derEle, noLeftOvers=0): + p = DerObject.decode(derEle, noLeftOvers) + if not self.isType("OCTET STRING"): + raise ValueError("Not a valid OCTET STRING.") + return p + +class DerNull(DerObject): + def __init__(self): + DerObject.__init__(self, 'NULL') + +class DerObjectId(DerObject): + def __init__(self): + DerObject.__init__(self, 'OBJECT IDENTIFIER') + + def decode(self, derEle, noLeftOvers=0): + p = DerObject.decode(derEle, noLeftOvers) + if not self.isType("OBJECT IDENTIFIER"): + raise ValueError("Not a valid OBJECT IDENTIFIER.") + return p + +def isInt(x): + test = 0 + try: + test += x + except TypeError: + return 0 + return 1 + diff --git a/frozen_deps/Crypto/Util/number.py b/frozen_deps/Crypto/Util/number.py new file mode 100644 index 0000000..0e1baa0 --- /dev/null +++ b/frozen_deps/Crypto/Util/number.py @@ -0,0 +1,1456 @@ +# +# number.py : Number-theoretic functions +# +# Part of the Python Cryptography Toolkit +# +# Written by Andrew M. Kuchling, Barry A. Warsaw, and others +# +# =================================================================== +# The contents of this file are dedicated to the public domain. To +# the extent that dedication to the public domain is not available, +# everyone is granted a worldwide, perpetual, royalty-free, +# non-exclusive license to exercise all rights associated with the +# contents of this file for any purpose whatsoever. +# No rights are reserved. +# +# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, +# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND +# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS +# BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN +# ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN +# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +# SOFTWARE. +# =================================================================== +# + +__revision__ = "$Id$" + +from Crypto.pct_warnings import GetRandomNumber_DeprecationWarning, PowmInsecureWarning +from warnings import warn as _warn +import math +import sys +from Crypto.Util.py3compat import * + +bignum = int +try: + from Crypto.PublicKey import _fastmath +except ImportError: + # For production, we are going to let import issues due to gmp/mpir shared + # libraries not loading slide silently and use slowmath. If you'd rather + # see an exception raised if _fastmath exists but cannot be imported, + # uncomment the below + # + # from distutils.sysconfig import get_config_var + # import inspect, os + # _fm_path = os.path.normpath(os.path.dirname(os.path.abspath( + # inspect.getfile(inspect.currentframe()))) + # +"/../../PublicKey/_fastmath"+get_config_var("SO")) + # if os.path.exists(_fm_path): + # raise ImportError("While the _fastmath module exists, importing "+ + # "it failed. This may point to the gmp or mpir shared library "+ + # "not being in the path. _fastmath was found at "+_fm_path) + _fastmath = None + +# You need libgmp v5 or later to get mpz_powm_sec. Warn if it's not available. +if _fastmath is not None and not _fastmath.HAVE_DECL_MPZ_POWM_SEC: + _warn("Not using mpz_powm_sec. You should rebuild using libgmp >= 5 to avoid timing attack vulnerability.", PowmInsecureWarning) + +# New functions +from ._number_new import * + +# Commented out and replaced with faster versions below +## def long2str(n): +## s='' +## while n>0: +## s=chr(n & 255)+s +## n=n>>8 +## return s + +## import types +## def str2long(s): +## if type(s)!=types.StringType: return s # Integers will be left alone +## return reduce(lambda x,y : x*256+ord(y), s, 0L) + +def size (N): + """size(N:long) : int + Returns the size of the number N in bits. + """ + bits = 0 + while N >> bits: + bits += 1 + return bits + +def getRandomNumber(N, randfunc=None): + """Deprecated. Use getRandomInteger or getRandomNBitInteger instead.""" + warnings.warn("Crypto.Util.number.getRandomNumber has confusing semantics"+ + "and has been deprecated. Use getRandomInteger or getRandomNBitInteger instead.", + GetRandomNumber_DeprecationWarning) + return getRandomNBitInteger(N, randfunc) + +def getRandomInteger(N, randfunc=None): + """getRandomInteger(N:int, randfunc:callable):long + Return a random number with at most N bits. + + If randfunc is omitted, then Random.new().read is used. + + This function is for internal use only and may be renamed or removed in + the future. + """ + if randfunc is None: + _import_Random() + randfunc = Random.new().read + + S = randfunc(N>>3) + odd_bits = N % 8 + if odd_bits != 0: + char = ord(randfunc(1)) >> (8-odd_bits) + S = bchr(char) + S + value = bytes_to_long(S) + return value + +def getRandomRange(a, b, randfunc=None): + """getRandomRange(a:int, b:int, randfunc:callable):long + Return a random number n so that a <= n < b. + + If randfunc is omitted, then Random.new().read is used. + + This function is for internal use only and may be renamed or removed in + the future. + """ + range_ = b - a - 1 + bits = size(range_) + value = getRandomInteger(bits, randfunc) + while value > range_: + value = getRandomInteger(bits, randfunc) + return a + value + +def getRandomNBitInteger(N, randfunc=None): + """getRandomInteger(N:int, randfunc:callable):long + Return a random number with exactly N-bits, i.e. a random number + between 2**(N-1) and (2**N)-1. + + If randfunc is omitted, then Random.new().read is used. + + This function is for internal use only and may be renamed or removed in + the future. + """ + value = getRandomInteger (N-1, randfunc) + value |= 2 ** (N-1) # Ensure high bit is set + assert size(value) >= N + return value + +def GCD(x,y): + """GCD(x:long, y:long): long + Return the GCD of x and y. + """ + x = abs(x) ; y = abs(y) + while x > 0: + x, y = y % x, x + return y + +def inverse(u, v): + """inverse(u:long, v:long):long + Return the inverse of u mod v. + """ + u3, v3 = int(u), int(v) + u1, v1 = 1, 0 + while v3 > 0: + q=divmod(u3, v3)[0] + u1, v1 = v1, u1 - v1*q + u3, v3 = v3, u3 - v3*q + while u1<0: + u1 = u1 + v + return u1 + +# Given a number of bits to generate and a random generation function, +# find a prime number of the appropriate size. + +def getPrime(N, randfunc=None): + """getPrime(N:int, randfunc:callable):long + Return a random N-bit prime number. + + If randfunc is omitted, then Random.new().read is used. + """ + if randfunc is None: + _import_Random() + randfunc = Random.new().read + + number=getRandomNBitInteger(N, randfunc) | 1 + while (not isPrime(number, randfunc=randfunc)): + number=number+2 + return number + + +def _rabinMillerTest(n, rounds, randfunc=None): + """_rabinMillerTest(n:long, rounds:int, randfunc:callable):int + Tests if n is prime. + Returns 0 when n is definitly composite. + Returns 1 when n is probably prime. + Returns 2 when n is definitly prime. + + If randfunc is omitted, then Random.new().read is used. + + This function is for internal use only and may be renamed or removed in + the future. + """ + # check special cases (n==2, n even, n < 2) + if n < 3 or (n & 1) == 0: + return n == 2 + # n might be very large so it might be beneficial to precalculate n-1 + n_1 = n - 1 + # determine m and b so that 2**b * m = n - 1 and b maximal + b = 0 + m = n_1 + while (m & 1) == 0: + b += 1 + m >>= 1 + + tested = [] + # we need to do at most n-2 rounds. + for i in range (min (rounds, n-2)): + # randomly choose a < n and make sure it hasn't been tested yet + a = getRandomRange (2, n, randfunc) + while a in tested: + a = getRandomRange (2, n, randfunc) + tested.append (a) + # do the rabin-miller test + z = pow (a, m, n) # (a**m) % n + if z == 1 or z == n_1: + continue + composite = 1 + for r in range (b): + z = (z * z) % n + if z == 1: + return 0 + elif z == n_1: + composite = 0 + break + if composite: + return 0 + return 1 + +def getStrongPrime(N, e=0, false_positive_prob=1e-6, randfunc=None): + """getStrongPrime(N:int, e:int, false_positive_prob:float, randfunc:callable):long + Return a random strong N-bit prime number. + In this context p is a strong prime if p-1 and p+1 have at + least one large prime factor. + N should be a multiple of 128 and > 512. + + If e is provided the returned prime p-1 will be coprime to e + and thus suitable for RSA where e is the public exponent. + + The optional false_positive_prob is the statistical probability + that true is returned even though it is not (pseudo-prime). + It defaults to 1e-6 (less than 1:1000000). + Note that the real probability of a false-positive is far less. This is + just the mathematically provable limit. + + randfunc should take a single int parameter and return that + many random bytes as a string. + If randfunc is omitted, then Random.new().read is used. + """ + # This function was implemented following the + # instructions found in the paper: + # "FAST GENERATION OF RANDOM, STRONG RSA PRIMES" + # by Robert D. Silverman + # RSA Laboratories + # May 17, 1997 + # which by the time of writing could be freely downloaded here: + # http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.17.2713&rep=rep1&type=pdf + + # Use the accelerator if available + if _fastmath is not None: + return _fastmath.getStrongPrime(int(N), int(e), false_positive_prob, + randfunc) + + if (N < 512) or ((N % 128) != 0): + raise ValueError ("bits must be multiple of 128 and > 512") + + rabin_miller_rounds = int(math.ceil(-math.log(false_positive_prob)/math.log(4))) + + # calculate range for X + # lower_bound = sqrt(2) * 2^{511 + 128*x} + # upper_bound = 2^{512 + 128*x} - 1 + x = (N - 512) >> 7; + # We need to approximate the sqrt(2) in the lower_bound by an integer + # expression because floating point math overflows with these numbers + lower_bound = divmod(14142135623730950489 * (2 ** (511 + 128*x)), + 10000000000000000000)[0] + upper_bound = (1 << (512 + 128*x)) - 1 + # Randomly choose X in calculated range + X = getRandomRange (lower_bound, upper_bound, randfunc) + + # generate p1 and p2 + p = [0, 0] + for i in (0, 1): + # randomly choose 101-bit y + y = getRandomNBitInteger (101, randfunc) + # initialize the field for sieving + field = [0] * 5 * len (sieve_base) + # sieve the field + for prime in sieve_base: + offset = y % prime + for j in range ((prime - offset) % prime, len (field), prime): + field[j] = 1 + + # look for suitable p[i] starting at y + result = 0 + for j in range(len(field)): + composite = field[j] + # look for next canidate + if composite: + continue + tmp = y + j + result = _rabinMillerTest (tmp, rabin_miller_rounds) + if result > 0: + p[i] = tmp + break + if result == 0: + raise RuntimeError ("Couln't find prime in field. " + "Developer: Increase field_size") + + # Calculate R + # R = (p2^{-1} mod p1) * p2 - (p1^{-1} mod p2) * p1 + tmp1 = inverse (p[1], p[0]) * p[1] # (p2^-1 mod p1)*p2 + tmp2 = inverse (p[0], p[1]) * p[0] # (p1^-1 mod p2)*p1 + R = tmp1 - tmp2 # (p2^-1 mod p1)*p2 - (p1^-1 mod p2)*p1 + + # search for final prime number starting by Y0 + # Y0 = X + (R - X mod p1p2) + increment = p[0] * p[1] + X = X + (R - (X % increment)) + while 1: + is_possible_prime = 1 + # first check candidate against sieve_base + for prime in sieve_base: + if (X % prime) == 0: + is_possible_prime = 0 + break + # if e is given make sure that e and X-1 are coprime + # this is not necessarily a strong prime criterion but useful when + # creating them for RSA where the p-1 and q-1 should be coprime to + # the public exponent e + if e and is_possible_prime: + if e & 1: + if GCD (e, X-1) != 1: + is_possible_prime = 0 + else: + if GCD (e, divmod((X-1),2)[0]) != 1: + is_possible_prime = 0 + + # do some Rabin-Miller-Tests + if is_possible_prime: + result = _rabinMillerTest (X, rabin_miller_rounds) + if result > 0: + break + X += increment + # abort when X has more bits than requested + # TODO: maybe we shouldn't abort but rather start over. + if X >= 1 << N: + raise RuntimeError ("Couln't find prime in field. " + "Developer: Increase field_size") + return X + +def isPrime(N, false_positive_prob=1e-6, randfunc=None): + """isPrime(N:long, false_positive_prob:float, randfunc:callable):bool + Return true if N is prime. + + The optional false_positive_prob is the statistical probability + that true is returned even though it is not (pseudo-prime). + It defaults to 1e-6 (less than 1:1000000). + Note that the real probability of a false-positive is far less. This is + just the mathematically provable limit. + + If randfunc is omitted, then Random.new().read is used. + """ + if _fastmath is not None: + return _fastmath.isPrime(int(N), false_positive_prob, randfunc) + + if N < 3 or N & 1 == 0: + return N == 2 + for p in sieve_base: + if N == p: + return 1 + if N % p == 0: + return 0 + + rounds = int(math.ceil(-math.log(false_positive_prob)/math.log(4))) + return _rabinMillerTest(N, rounds, randfunc) + + +# Improved conversion functions contributed by Barry Warsaw, after +# careful benchmarking + +import struct + +def long_to_bytes(n, blocksize=0): + """long_to_bytes(n:long, blocksize:int) : string + Convert a long integer to a byte string. + + If optional blocksize is given and greater than zero, pad the front of the + byte string with binary zeros so that the length is a multiple of + blocksize. + """ + # after much testing, this algorithm was deemed to be the fastest + s = b('') + n = int(n) + pack = struct.pack + while n > 0: + s = pack('>I', n & 0xffffffff) + s + n = n >> 32 + # strip off leading zeros + for i in range(len(s)): + if s[i] != b('\000')[0]: + break + else: + # only happens when n == 0 + s = b('\000') + i = 0 + s = s[i:] + # add back some pad bytes. this could be done more efficiently w.r.t. the + # de-padding being done above, but sigh... + if blocksize > 0 and len(s) % blocksize: + s = (blocksize - len(s) % blocksize) * b('\000') + s + return s + +def bytes_to_long(s): + """bytes_to_long(string) : long + Convert a byte string to a long integer. + + This is (essentially) the inverse of long_to_bytes(). + """ + acc = 0 + unpack = struct.unpack + length = len(s) + if length % 4: + extra = (4 - length % 4) + s = b('\000') * extra + s + length = length + extra + for i in range(0, length, 4): + acc = (acc << 32) + unpack('>I', s[i:i+4])[0] + return acc + +# For backwards compatibility... +import warnings +def long2str(n, blocksize=0): + warnings.warn("long2str() has been replaced by long_to_bytes()") + return long_to_bytes(n, blocksize) +def str2long(s): + warnings.warn("str2long() has been replaced by bytes_to_long()") + return bytes_to_long(s) + +def _import_Random(): + # This is called in a function instead of at the module level in order to + # avoid problems with recursive imports + global Random, StrongRandom + from Crypto import Random + from Crypto.Random.random import StrongRandom + + + +# The first 10000 primes used for checking primality. +# This should be enough to eliminate most of the odd +# numbers before needing to do a Rabin-Miller test at all. +sieve_base = ( + 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, + 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, + 73, 79, 83, 89, 97, 101, 103, 107, 109, 113, + 127, 131, 137, 139, 149, 151, 157, 163, 167, 173, + 179, 181, 191, 193, 197, 199, 211, 223, 227, 229, + 233, 239, 241, 251, 257, 263, 269, 271, 277, 281, + 283, 293, 307, 311, 313, 317, 331, 337, 347, 349, + 353, 359, 367, 373, 379, 383, 389, 397, 401, 409, + 419, 421, 431, 433, 439, 443, 449, 457, 461, 463, + 467, 479, 487, 491, 499, 503, 509, 521, 523, 541, + 547, 557, 563, 569, 571, 577, 587, 593, 599, 601, + 607, 613, 617, 619, 631, 641, 643, 647, 653, 659, + 661, 673, 677, 683, 691, 701, 709, 719, 727, 733, + 739, 743, 751, 757, 761, 769, 773, 787, 797, 809, + 811, 821, 823, 827, 829, 839, 853, 857, 859, 863, + 877, 881, 883, 887, 907, 911, 919, 929, 937, 941, + 947, 953, 967, 971, 977, 983, 991, 997, 1009, 1013, + 1019, 1021, 1031, 1033, 1039, 1049, 1051, 1061, 1063, 1069, + 1087, 1091, 1093, 1097, 1103, 1109, 1117, 1123, 1129, 1151, + 1153, 1163, 1171, 1181, 1187, 1193, 1201, 1213, 1217, 1223, + 1229, 1231, 1237, 1249, 1259, 1277, 1279, 1283, 1289, 1291, + 1297, 1301, 1303, 1307, 1319, 1321, 1327, 1361, 1367, 1373, + 1381, 1399, 1409, 1423, 1427, 1429, 1433, 1439, 1447, 1451, + 1453, 1459, 1471, 1481, 1483, 1487, 1489, 1493, 1499, 1511, + 1523, 1531, 1543, 1549, 1553, 1559, 1567, 1571, 1579, 1583, + 1597, 1601, 1607, 1609, 1613, 1619, 1621, 1627, 1637, 1657, 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104053, 104059, +104087, 104089, 104107, 104113, 104119, 104123, 104147, 104149, 104161, 104173, +104179, 104183, 104207, 104231, 104233, 104239, 104243, 104281, 104287, 104297, +104309, 104311, 104323, 104327, 104347, 104369, 104381, 104383, 104393, 104399, +104417, 104459, 104471, 104473, 104479, 104491, 104513, 104527, 104537, 104543, +104549, 104551, 104561, 104579, 104593, 104597, 104623, 104639, 104651, 104659, +104677, 104681, 104683, 104693, 104701, 104707, 104711, 104717, 104723, 104729, +) diff --git a/frozen_deps/Crypto/Util/py3compat.py b/frozen_deps/Crypto/Util/py3compat.py new file mode 100644 index 0000000..f8367c9 --- /dev/null +++ b/frozen_deps/Crypto/Util/py3compat.py @@ -0,0 +1,107 @@ +# -*- coding: utf-8 -*- +# +# Util/py3compat.py : Compatibility code for handling Py3k / Python 2.x +# +# Written in 2010 by Thorsten Behrens +# +# =================================================================== +# The contents of this file are dedicated to the public domain. To +# the extent that dedication to the public domain is not available, +# everyone is granted a worldwide, perpetual, royalty-free, +# non-exclusive license to exercise all rights associated with the +# contents of this file for any purpose whatsoever. +# No rights are reserved. +# +# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, +# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND +# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS +# BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN +# ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN +# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +# SOFTWARE. +# =================================================================== + +"""Compatibility code for handling string/bytes changes from Python 2.x to Py3k + +In Python 2.x, strings (of type ''str'') contain binary data, including encoded +Unicode text (e.g. UTF-8). The separate type ''unicode'' holds Unicode text. +Unicode literals are specified via the u'...' prefix. Indexing or slicing +either type always produces a string of the same type as the original. +Data read from a file is always of '''str'' type. + +In Python 3.x, strings (type ''str'') may only contain Unicode text. The u'...' +prefix and the ''unicode'' type are now redundant. A new type (called +''bytes'') has to be used for binary data (including any particular +''encoding'' of a string). The b'...' prefix allows one to specify a binary +literal. Indexing or slicing a string produces another string. Slicing a byte +string produces another byte string, but the indexing operation produces an +integer. Data read from a file is of '''str'' type if the file was opened in +text mode, or of ''bytes'' type otherwise. + +Since PyCrypto aims at supporting both Python 2.x and 3.x, the following helper +functions are used to keep the rest of the library as independent as possible +from the actual Python version. + +In general, the code should always deal with binary strings, and use integers +instead of 1-byte character strings. + +b(s) + Take a text string literal (with no prefix or with u'...' prefix) and + make a byte string. +bchr(c) + Take an integer and make a 1-character byte string. +bord(c) + Take the result of indexing on a byte string and make an integer. +tobytes(s) + Take a text string, a byte string, or a sequence of character taken from + a byte string and make a byte string. +""" + +__revision__ = "$Id$" + +import sys + +if sys.version_info[0] == 2: + def b(s): + return s + def bchr(s): + return chr(s) + def bstr(s): + return str(s) + def bord(s): + return ord(s) + if sys.version_info[1] == 1: + def tobytes(s): + try: + return s.encode('latin-1') + except: + return ''.join(s) + else: + def tobytes(s): + if isinstance(s, str): + return s.encode("latin-1") + else: + return ''.join(s) +else: + def b(s): + return s.encode("latin-1") # utf-8 would cause some side-effects we don't want + def bchr(s): + return bytes([s]) + def bstr(s): + if isinstance(s,str): + return bytes(s,"latin-1") + else: + return bytes(s) + def bord(s): + return s + def tobytes(s): + if isinstance(s,bytes): + return s + else: + if isinstance(s,str): + return s.encode("latin-1") + else: + return bytes(s) + +# vim:set ts=4 sw=4 sts=4 expandtab: diff --git a/frozen_deps/Crypto/Util/randpool.py b/frozen_deps/Crypto/Util/randpool.py new file mode 100644 index 0000000..8b5a0b7 --- /dev/null +++ b/frozen_deps/Crypto/Util/randpool.py @@ -0,0 +1,82 @@ +# +# randpool.py : Cryptographically strong random number generation +# +# Part of the Python Cryptography Toolkit +# +# Written by Andrew M. Kuchling, Mark Moraes, and others +# +# =================================================================== +# The contents of this file are dedicated to the public domain. To +# the extent that dedication to the public domain is not available, +# everyone is granted a worldwide, perpetual, royalty-free, +# non-exclusive license to exercise all rights associated with the +# contents of this file for any purpose whatsoever. +# No rights are reserved. +# +# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, +# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND +# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS +# BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN +# ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN +# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +# SOFTWARE. +# =================================================================== +# + +__revision__ = "$Id$" + +from Crypto.pct_warnings import RandomPool_DeprecationWarning +import Crypto.Random +import warnings + +class RandomPool: + """Deprecated. Use Random.new() instead. + + See http://www.pycrypto.org/randpool-broken + """ + def __init__(self, numbytes = 160, cipher=None, hash=None, file=None): + warnings.warn("This application uses RandomPool, which is BROKEN in older releases. See http://www.pycrypto.org/randpool-broken", + RandomPool_DeprecationWarning) + self.__rng = Crypto.Random.new() + self.bytes = numbytes + self.bits = self.bytes * 8 + self.entropy = self.bits + + def get_bytes(self, N): + return self.__rng.read(N) + + def _updateEntropyEstimate(self, nbits): + self.entropy += nbits + if self.entropy < 0: + self.entropy = 0 + elif self.entropy > self.bits: + self.entropy = self.bits + + def _randomize(self, N=0, devname="/dev/urandom"): + """Dummy _randomize() function""" + self.__rng.flush() + + def randomize(self, N=0): + """Dummy randomize() function""" + self.__rng.flush() + + def stir(self, s=''): + """Dummy stir() function""" + self.__rng.flush() + + def stir_n(self, N=3): + """Dummy stir_n() function""" + self.__rng.flush() + + def add_event(self, s=''): + """Dummy add_event() function""" + self.__rng.flush() + + def getBytes(self, N): + """Dummy getBytes() function""" + return self.get_bytes(N) + + def addEvent(self, event, s=""): + """Dummy addEvent() function""" + return self.add_event() diff --git a/frozen_deps/Crypto/Util/strxor.cpython-38-x86_64-linux-gnu.so b/frozen_deps/Crypto/Util/strxor.cpython-38-x86_64-linux-gnu.so Binary files differnew file mode 100755 index 0000000..8358023 --- /dev/null +++ b/frozen_deps/Crypto/Util/strxor.cpython-38-x86_64-linux-gnu.so diff --git a/frozen_deps/Crypto/Util/winrandom.py b/frozen_deps/Crypto/Util/winrandom.py new file mode 100644 index 0000000..0242815 --- /dev/null +++ b/frozen_deps/Crypto/Util/winrandom.py @@ -0,0 +1,28 @@ +# +# Util/winrandom.py : Stub for Crypto.Random.OSRNG.winrandom +# +# Written in 2008 by Dwayne C. Litzenberger <[email protected]> +# +# =================================================================== +# The contents of this file are dedicated to the public domain. To +# the extent that dedication to the public domain is not available, +# everyone is granted a worldwide, perpetual, royalty-free, +# non-exclusive license to exercise all rights associated with the +# contents of this file for any purpose whatsoever. +# No rights are reserved. +# +# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, +# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND +# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS +# BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN +# ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN +# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +# SOFTWARE. +# =================================================================== + +__revision__ = "$Id$" + +from Crypto.Random.OSRNG.winrandom import * + +# vim:set ts=4 sw=4 sts=4 expandtab: diff --git a/frozen_deps/Crypto/__init__.py b/frozen_deps/Crypto/__init__.py new file mode 100644 index 0000000..c27402e --- /dev/null +++ b/frozen_deps/Crypto/__init__.py @@ -0,0 +1,51 @@ +# -*- coding: utf-8 -*- +# +# =================================================================== +# The contents of this file are dedicated to the public domain. To +# the extent that dedication to the public domain is not available, +# everyone is granted a worldwide, perpetual, royalty-free, +# non-exclusive license to exercise all rights associated with the +# contents of this file for any purpose whatsoever. +# No rights are reserved. +# +# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, +# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND +# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS +# BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN +# ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN +# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +# SOFTWARE. +# =================================================================== + +"""Python Cryptography Toolkit + +A collection of cryptographic modules implementing various algorithms +and protocols. + +Subpackages: + +Crypto.Cipher + Secret-key (AES, DES, ARC4) and public-key encryption (RSA PKCS#1) algorithms +Crypto.Hash + Hashing algorithms (MD5, SHA, HMAC) +Crypto.Protocol + Cryptographic protocols (Chaffing, all-or-nothing transform, key derivation + functions). This package does not contain any network protocols. +Crypto.PublicKey + Public-key encryption and signature algorithms (RSA, DSA) +Crypto.Signature + Public-key signature algorithms (RSA PKCS#1) +Crypto.Util + Various useful modules and functions (long-to-string conversion, random number + generation, number theoretic functions) +""" + +__all__ = ['Cipher', 'Hash', 'Protocol', 'PublicKey', 'Util', 'Signature'] + +__version__ = '2.6.1' # See also below and setup.py +__revision__ = "$Id$" + +# New software should look at this instead of at __version__ above. +version_info = (2, 6, 1, 'final', 0) # See also above and setup.py + diff --git a/frozen_deps/Crypto/pct_warnings.py b/frozen_deps/Crypto/pct_warnings.py new file mode 100644 index 0000000..9b4361e --- /dev/null +++ b/frozen_deps/Crypto/pct_warnings.py @@ -0,0 +1,60 @@ +# -*- coding: ascii -*- +# +# pct_warnings.py : PyCrypto warnings file +# +# Written in 2008 by Dwayne C. Litzenberger <[email protected]> +# +# =================================================================== +# The contents of this file are dedicated to the public domain. To +# the extent that dedication to the public domain is not available, +# everyone is granted a worldwide, perpetual, royalty-free, +# non-exclusive license to exercise all rights associated with the +# contents of this file for any purpose whatsoever. +# No rights are reserved. +# +# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, +# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND +# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS +# BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN +# ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN +# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +# SOFTWARE. +# =================================================================== + +# +# Base classes. All our warnings inherit from one of these in order to allow +# the user to specifically filter them. +# + +class CryptoWarning(Warning): + """Base class for PyCrypto warnings""" + +class CryptoDeprecationWarning(DeprecationWarning, CryptoWarning): + """Base PyCrypto DeprecationWarning class""" + +class CryptoRuntimeWarning(RuntimeWarning, CryptoWarning): + """Base PyCrypto RuntimeWarning class""" + +# +# Warnings that we might actually use +# + +class RandomPool_DeprecationWarning(CryptoDeprecationWarning): + """Issued when Crypto.Util.randpool.RandomPool is instantiated.""" + +class ClockRewindWarning(CryptoRuntimeWarning): + """Warning for when the system clock moves backwards.""" + +class GetRandomNumber_DeprecationWarning(CryptoDeprecationWarning): + """Issued when Crypto.Util.number.getRandomNumber is invoked.""" + +class PowmInsecureWarning(CryptoRuntimeWarning): + """Warning for when _fastmath is built without mpz_powm_sec""" + +# By default, we want this warning to be shown every time we compensate for +# clock rewinding. +import warnings as _warnings +_warnings.filterwarnings('always', category=ClockRewindWarning, append=1) + +# vim:set ts=4 sw=4 sts=4 expandtab: |