Lines Matching refs:_cipher

54         self._cipher = None
62         if self._cipher is None:
69                 self._cipher = EVP.Cipher('des_cbc', key, iv, 0)
71                 self._cipher = Cipher(algorithms.TripleDES(key), modes.CBC(iv),
74                 self._cipher = DES.new(key, DES.MODE_CBC, iv)
78                 return self._cipher.update(chunk)
80                 return self._cipher.update(chunk)
82                 return self._cipher.decrypt(chunk)
87         if self._cipher is None:
90             return self._cipher.final()
92             return self._cipher.finalize()