# This file is dual licensed under the terms of the Apache License, Version # 2.0, and the BSD License. See the LICENSE file in the root of this repository # for complete details. import abc class AsymmetricSignatureContext(metaclass=abc.ABCMeta): @abc.abstractmethod def update(self, data: bytes) -> None: """ Processes the provided bytes and returns nothing. """ @abc.abstractmethod def finalize(self) -> bytes: """ Returns the signature as bytes. """ class AsymmetricVerificationContext(metaclass=abc.ABCMeta): @abc.abstractmethod def update(self, data: bytes) -> None: """ Processes the provided bytes and returns nothing. """ @abc.abstractmethod def verify(self) -> None: """ Raises an exception if the bytes provided to update do not match the signature or the signature does not match the public key. """