from typing import Union, Callable, Optional from typing_extensions import Protocol from Crypto.PublicKey.RSA import RsaKey class Hash(Protocol): def digest(self) -> bytes: ... def update(self, bytes) -> None: ... class HashModule(Protocol): @staticmethod def new(data: Optional[bytes]) -> Hash: ... MaskFunction = Callable[[bytes, int, Union[Hash, HashModule]], bytes] RndFunction = Callable[[int], bytes] class PSS_SigScheme: def __init__(self, key: RsaKey, mgfunc: MaskFunction, saltLen: int, randfunc: RndFunction) -> None: ... def can_sign(self) -> bool: ... def sign(self, msg_hash: Hash) -> bytes: ... def verify(self, msg_hash: Hash, signature: bytes) -> bool: ... def new(rsa_key: RsaKey, mgfunc: Optional[MaskFunction]=None, saltLen: Optional[int]=None, randfunc: Optional[RndFunction]=None) -> PSS_SigScheme: ...