Aspose::Words::DigitalSignatures::DigitalSignatureUtil::Sign method. Signs source document using given CertificateHolder with digital signature and writes signed document to destination stream. Supported formats are: Doc, Dot, DocX, DotX, Docm, Odt, Ott.Output will be written to the start of stream and stream size will be updated with content length in C++....Shows how to sign documents with X.509 certificates. // Verify that...sign documents. // Create an X.509 certificate from a PKCS#12...