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prefer ctypes over m2crypto in rc4-md5

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This commit is contained in:
clowwindy 2014-11-01 13:52:16 +08:00
parent 4affb56d36
commit 90dc03c762
1 changed files with 8 additions and 14 deletions
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22
shadowsocks/crypto/rc4_md5.py
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@ -28,28 +28,22 @@ 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)
try:
from shadowsocks.crypto import ctypes_openssl
return ctypes_openssl.CtypesCrypto(b'rc4', rc4_key, b'', op)
except:
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)
ciphers = {