Verifies the signature of the current message.
def verify_signature() -> None: ...
This method verifies the signature of the message.
The message will be verified using the keys specified in the SignerKey* properties. Before verification begins the class will fire the on_signature_info event with information about the signature including the key used to sign the message. Within this event you may use the information available to load the correct key into the SignerKey* properties.
By default, if the signature is not valid the class fails with an error. The configuration setting RequireValidSignature may be set to False to disable this requirement. When RequireValidSignature is set to False, the Status parameter of the on_verification_status event should be checked to determine the result of the operation.