Gets the signature information for an signed message.
def get_signer_cert_info() -> None: ...
This method retrieves information about the certificate used to sign the message. This may be called prior to calling verify_signature to determine which certificate should be loaded for verification.
When this method is called the on_signer_cert_info event fires once for each signer of the message. Use the parameters of the on_signer_cert_info to determine which certificate to specify before calling verify_signature.
Note: Use of this method is optional. If no certificate is specified before calling verify_signature the class will fire the on_signer_cert_info and a certificate may be loaded from within the event at that time (if necessary).