Python port of ShadowsocksR
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#!/usr/bin/env python
# Copyright (c) 2014 clowwindy
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# 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 __future__ import absolute_import, division, print_function, \
with_statement
import hashlib
__all__ = ['ciphers']
m2_not_found = False
def create_cipher(alg, key, iv, op, key_as_bytes=0, d=None, salt=None,
i=1, padding=1):
global m2_not_found
md5 = hashlib.md5()
md5.update(key)
md5.update(iv)
rc4_key = md5.digest()
if not m2_not_found:
try:
import M2Crypto.EVP
return M2Crypto.EVP.Cipher(b'rc4', rc4_key, b'', op,
key_as_bytes=0, d='md5', salt=None, i=1,
padding=1)
except:
m2_not_found = True
from shadowsocks.crypto import ctypes_openssl
return ctypes_openssl.CtypesCrypto(b'rc4', rc4_key, b'', op)
ciphers = {
b'rc4-md5': (16, 16, create_cipher),
}