From 3bef51eec2299403467e621ae660cef3f9256ac8 Mon Sep 17 00:00:00 2001 From: Determinant Date: Tue, 17 Nov 2020 18:47:40 -0500 Subject: update frozen deps --- frozen_deps/Crypto/Cipher/XOR.py | 86 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 86 insertions(+) create mode 100644 frozen_deps/Crypto/Cipher/XOR.py (limited to 'frozen_deps/Crypto/Cipher/XOR.py') 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) + -- cgit v1.2.3