+ def __init__(self, engine_id, **kwargs):
+ if pyver > 2 or isinstance(engine_id, unicode):
+ engine_id = engine_id.encode('utf-8')
+ eng = libcrypto.ENGINE_by_id(engine_id)
+ if eng is None:
+ # Try load engine
+ eng = libcrypto.ENGINE_by_id("dynamic")
+ if eng is None:
+ raise LibCryptoError("Cannot get 'dynamic' engine")
+ if not libcrypto.ENGINE_ctrl_cmd_string(eng, "SO_PATH",
+ engine_id, 0):
+ raise LibCryptoError("Cannot execute ctrl cmd SO_PATH")
+ if not libcrypto.ENGINE_ctrl_cmd_string(eng, "LOAD", None, 0):
+ raise LibCryptoError("Cannot execute ctrl cmd LOAD")
+ if eng is None:
+ raise ValueError("Cannot find engine " + engine)
+ for cmd, value in kwargs.items():
+ if not libcrypto.ENGINE_ctrl_cmd_string(eng, cmd, value, 0):
+ raise LibCryptoError("Cannot execute ctrl cmd %s" % cmd)
+ if not libcrypto.ENGINE_init(eng):
+ raise LibCryptoError("Cannot initialize engine")
+ self.ptr = eng
+
+ def private_key(self, key_id, ui_method = None, ui_data=None):
+ from ctypescrypto.pkey import PKey
+ if ui_method is None:
+ ui_ptr = libcrypto.UI_OpenSSL()
+ else:
+ ui_ptr = ui_method.ptr
+ pkey = libcrypto.ENGINE_load_private_key(self.ptr, key_id, ui_ptr,
+ ui_data)
+ if pkey is None:
+ raise LibCryptoError("Cannot load private key")
+ return PKey(ptr=pkey, cansign=True)
+
+def set_default(eng, algorithms=0xFFFF):
+ """
+ Sets specified engine as default for all
+ algorithms, supported by it
+
+ For compatibility with 0.2.x if string is passed instead
+ of engine, attempts to load engine with this id
+ """
+ if not isinstance(eng,Engine):
+ eng=Engine(eng)