o -&%a@s ddlZGdddejdZdS)Nc@s@eZdZejdedefddZejdededdfddZdS) KeyDerivationFunction key_materialreturncCdS)zo Deterministically generates and returns a new key based on the existing key material. N)selfrrrM/usr/lib/python3/dist-packages/cryptography/hazmat/primitives/kdf/__init__.pyderive zKeyDerivationFunction.derive expected_keyNcCr)z Checks whether the key generated by the key material matches the expected derived key. Raises an exception if they do not match. Nr)rrr rrrverifyr zKeyDerivationFunction.verify)__name__ __module__ __qualname__abcabstractmethodbytesr r rrrrr s r) metaclass)rABCMetarrrrrs