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57 lines
1.9 KiB
57 lines
1.9 KiB
#!/usr/bin/env python
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# Copyright (c) 2014 clowwindy
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#
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# Permission is hereby granted, free of charge, to any person obtaining a copy
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# of this software and associated documentation files (the "Software"), to deal
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# in the Software without restriction, including without limitation the rights
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# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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# copies of the Software, and to permit persons to whom the Software is
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# furnished to do so, subject to the following conditions:
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#
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# The above copyright notice and this permission notice shall be included in
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# all copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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# SOFTWARE.
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from __future__ import absolute_import, division, print_function, \
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with_statement
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import hashlib
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__all__ = ['ciphers']
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m2_not_found = False
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def create_cipher(alg, key, iv, op, key_as_bytes=0, d=None, salt=None,
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i=1, padding=1):
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global m2_not_found
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md5 = hashlib.md5()
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md5.update(key)
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md5.update(iv)
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rc4_key = md5.digest()
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if not m2_not_found:
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try:
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import M2Crypto.EVP
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return M2Crypto.EVP.Cipher(b'rc4', rc4_key, b'', op,
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key_as_bytes=0, d='md5', salt=None, i=1,
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padding=1)
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except:
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m2_not_found = True
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from shadowsocks.crypto import ctypes_openssl
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return ctypes_openssl.CtypesCrypto(b'rc4', rc4_key, b'', op)
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ciphers = {
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b'rc4-md5': (16, 16, create_cipher),
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}
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