backend.py 文件源码

def _check_cipher_response(self, response):
        if response == self._lib.kCCSuccess:
            return
        elif response == self._lib.kCCAlignmentError:
            # This error is not currently triggered due to a bug filed as
            # rdar://15589470
            raise ValueError(
                "The length of the provided data is not a multiple of "
                "the block length."
            )
        else:
            raise InternalError(
                "The backend returned an unknown error, consider filing a bug."
                " Code: {0}.".format(response),
                response
            )