Represents an KeyInfo XML-Sig tag
Optional. If given, it must be an instance of Crypt::OpenSSL::X509. If not given, the tag is still generated, however, the content of the X509Certificate tag will be empty. It may later be filled in via some signing process.
Optional. The certificate name, used by some applications to distinguish between possible certificates.
A template specific to the document type.
If the "cert" is given, this method formats and returns it for inserting into the X509Certificate tag body.