U g@s,ddlmZddlZGdddejdZdS)) annotationsNc@s:eZdZejdddddZejddddddZd S) KeyDerivationFunctionbytes) key_materialreturncCsdS)zo Deterministically generates and returns a new key based on the existing key material. N)selfrrrO/tmp/pip-unpacked-wheel-nr_9cwun/cryptography/hazmat/primitives/kdf/__init__.pyderive szKeyDerivationFunction.deriveNone)r expected_keyrcCsdS)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 rrr verifyszKeyDerivationFunction.verifyN)__name__ __module__ __qualname__abcabstractmethodr r rrrr r sr) metaclass) __future__rrABCMetarrrrr s