if (cipher_type.flags() & 8) != 0:
# Variable key length cipher.
result = libcrypto.EVP_CipherInit_ex(self.ctx, cipher_type.cipher, None, None, None, c_int(enc))
if (cipher_type.flags() & 8) != 0:
# Variable key length cipher.
result = libcrypto.EVP_CipherInit_ex(self.ctx, cipher_type.cipher, None, None, None, c_int(enc))