## sign(src_stream, dst_stream, cert_holder, sign_options) {#bytesio_bytesio_certificateholder_signoptions} Signs source document using given [CertificateHolder](../../certificateholder/) and [Sign...... certificate_holder = aw.digitalsignatures.CertificateHolder...IR + 'morzal.pfx', password='aw') # Create a comment and date...