rsa.py 文件源码

def __init__(self, backend, private_key, padding, algorithm):
        self._backend = backend
        self._private_key = private_key

        self._padding_enum = _rsa_sig_determine_padding(
            backend, private_key, padding, algorithm
        )
        self._padding = padding
        self._algorithm = algorithm
        self._hash_ctx = hashes.Hash(self._algorithm, self._backend)