old_contents: #!/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('rc4', rc4_key, '', 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('rc4', rc4_key, '', op)
  
  
  ciphers = {
      b'rc4-md5': (16, 16, create_cipher),
  }
  
new_contents: #!/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),
  }
  
subject: fix rc4-md5