ctypescrypto/engine.py

   1 from ctypes import *
   2 from ctypescrypto import libcrypto
   3 from ctypescrypto.exception import LibCryptoError
   4 default=None
   5
   6 def set_default(engine):
   7         global default
   8         e=libcrypto.ENGINE_by_id(engine)
   9         if e is None:
  10                 # Try load engine
  11                 e = libcrypto.ENGINE_by_id("dynamic")
  12                 if  e is None:
  13                         raise LibCryptoError("Cannot get 'dynamic' engine")
  14                 if not libcrypto.ENGINE_ctrl_cmd_string(e,"SO_PATH",engine,0):
  15                         raise LibCryptoError("Cannot execute ctrl cmd SO_PATH")
  16                 if not libcrypto.ENGINE_ctrl_cmd_string(e,"LOAD",None,0):
  17                         raise LibCryptoError("Cannot execute ctrl cmd LOAD")
  18         if e is None:
  19                 raise ValueError("Cannot find engine "+engine)
  20         libcrypto.ENGINE_set_default(e,c_int(0xFFFF))
  21         default=e
  22
  23 # Declare function result and arguments for used functions
  24 libcrypto.ENGINE_by_id.restype=c_void_p
  25 libcrypto.ENGINE_by_id.argtypes=(c_char_p,)
  26 libcrypto.ENGINE_set_default.argtypes=(c_void_p,c_int)
  27 libcrypto.ENGINE_ctrl_cmd_string.argtypes=(c_void_p,c_char_p,c_char_p,c_int)