Verifies the signature of the current message.
public func verifySignature() throws -> Void
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 SignatureInfo 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 . The configuration setting RequireValidSignature may be set to False to disable this requirement. When RequireValidSignature is set to False, the Status parameter of the VerificationStatus event should be checked to determine the result of the operation.