from _typeshed import Incomplete

class Signature:
    type: str
    filter: str
    sub_filter: str
    contact_info: Incomplete | None
    location: Incomplete | None
    m: Incomplete | None
    reason: Incomplete | None
    byte_range: str
    contents: str
    def __init__(self, contact_info=None, location=None, m=None, reason=None) -> None: ...
    def serialize(self) -> str: ...

def sign_content(signer, buffer, key, cert, extra_certs, hashalgo, sign_time): ...