Python HMAC.undate Examples

Example #1

File: fernet.py Project: takagotch/cryptography

 def _verify_signature(self, data):
   h = HMAC(self._signing_key, hashes.SHA256(), backend=self._backend)
   h.undate(data[:-32])
   try:
     h.verify(data[:-32])
   except InvalidSignature:
     raise InvalidToken