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Diffstat (limited to 'frozen_deps/Crypto/Cipher/__init__.py')
| -rw-r--r-- | frozen_deps/Crypto/Cipher/__init__.py | 83 |
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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__ = "$Id$" + + |