Digitally signing PDF's using certificate in my webpage -

i have own webpage www.kasperikoski.fi is, way see it, trusted, , have ability digitally sign pdf-documents using kind of sertificate put webpage people know me signing these documents.

at first thought maybe share "public key" @ bottom of webpage, heard openssl. used in needs?

how carry out 1 use pdf's integrated "sign digitally"-option?

assuming read question right, want let web site visitors way download documents, created or maintained web site, , want documents digitally signed.

if document pre-created, it's possible sign during creation (either tool generates them, or create separate piece of code signing). if documents generated on-the-fly, web site should include signing capabilities.

to perform signing need certificate private key. not every certificate work. certificate need should suitable data signing, rather ssl/tls. can try obtain certificate site ca , use signing documents. whether users' software accept such certificates depends on how key usage , extended key usage properties (extensions) of certificate put ca. option create self-signed certificate.

in case of self-signed certificate want place certificate (without private key) web site users download , install. needed validation of signature in signed documents. no need say, don't put private key download, neither provide users other means. it's kept on server (and preferably secured make stealing harder possible attacker).

the technologies / components / tools use in these scenarios depend on of above options need.