crypto.py 文件源码

def __verify_signature(self, signature, signer_pk, content):
        """ Verify RSASSA-PSS signature

        @developer: vsmysle

        :param signature: signature bytes to verify
        :param signer_pk: instance of cryptography.hazmat.primitives.
                          rsa.RSAPublicKey that is a public key of a signer
        :param content:   content to verify a signature of

        :return: bool verification result

        """
        self.logger.debug("starting signature verification routine")
        try:
            signer_pk.verify(
                signature,
                content,
                asym_padding.PSS(
                    mgf=asym_padding.MGF1(SHA1()),
                    salt_length=asym_padding.PSS.MAX_LENGTH
                ),
                SHA1()
            )
        except InvalidSignature:
            self.logger.warn("signature verification failed")
            return False
        self.logger.info("signature OK")
        return True