C///

\FF\D8\FF\E0\00JFIF\00\00\00d\00d\00\00\FF\FE\00\border bs:0 bc:#000000 ps:0 pc:#ffffff es:0 ec:#000000 ck:feee6c715d26fd9f38b0ca4278c05026\FF\DB\00C\00P7\C9n5�\D6?\BD�\9Ds\EBp\9F[`8m\B7)o\B5\E8\E6I\99\FE3]]A2\BA\8Cw\D6E\93\\DEv\C8\009\F2\F1NI?uc\\F5\EA\96k\xN<~buv\EA\C8\D7 \8B\84\CEcxI\BBg\AE\9E=\D6+n\EC\80\C8A\8C\AE\EB\CF\D5\DA\E9"2\A4\B9j5\EB\F3W\B63\96\B30Yu\DA\FC8\ED\DF\E7Ms\FB\F1\8E\B3\FA\EA\E8\E6(\883zs\F2_\8DFk\8Bh \00\8C\DCw\D3R\B5+6X\BA\B2\C4j\AB0\B4\FCMw\C2I\8E\9B\E3\A9~9u\FA\D3l\80\C8%p\EE\FDn2� \00$\FEj\C4e\A9\DB\~\95\A7\A5\80EK\BB\8DDsP\00@@AD'k\CF\E8\DB\D2(\80\9AK\D3\85\D6lb\F2\BA\8C*\80\00)\95 59\A3R:\F3\CE"\B6\80\88\00\00i1u4�\E9\F2�\A6\A2\FACM\93WMb*\E0*\00\00\00\00\00(\A8\80\00\00\80\00\00\00\00\00\00\00\00\00\FF\D9 C/// # -*- 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. # =================================================================== from Crypto.Util._raw_api import (load_pycryptodome_raw_lib, VoidPointer, create_string_buffer, get_raw_buffer, SmartPointer, c_size_t, c_uint8_ptr) _raw_arc4_lib = load_pycryptodome_raw_lib("Crypto.Cipher._ARC4", """ int ARC4_stream_encrypt(void *rc4State, const uint8_t in[], uint8_t out[], size_t len); int ARC4_stream_init(uint8_t *key, size_t keylen, void **pRc4State); int ARC4_stream_destroy(void *rc4State); """) class ARC4Cipher: """ARC4 cipher object. Do not create it directly. Use :func:`Crypto.Cipher.ARC4.new` instead. """ def __init__(self, key, *args, **kwargs): """Initialize an ARC4 cipher object See also `new()` at the module level.""" if len(args) > 0: ndrop = args[0] args = args[1:] else: ndrop = kwargs.pop('drop', 0) if len(key) not in key_size: raise ValueError("Incorrect ARC4 key length (%d bytes)" % len(key)) self._state = VoidPointer() result = _raw_arc4_lib.ARC4_stream_init(c_uint8_ptr(key), c_size_t(len(key)), self._state.address_of()) if result != 0: raise ValueError("Error %d while creating the ARC4 cipher" % result) self._state = SmartPointer(self._state.get(), _raw_arc4_lib.ARC4_stream_destroy) if ndrop > 0: # This is OK even if the cipher is used for decryption, # since encrypt and decrypt are actually the same thing # with ARC4. self.encrypt(b'\x00' * ndrop) self.block_size = 1 self.key_size = len(key) def encrypt(self, plaintext): """Encrypt a piece of data. :param plaintext: The data to encrypt, of any size. :type plaintext: bytes, bytearray, memoryview :returns: the encrypted byte string, of equal length as the plaintext. """ ciphertext = create_string_buffer(len(plain