On 2018-06-05 15:31, Andrei Borzenkov wrote:
On Tue, Jun 5, 2018 at 4:14 PM, Carlos E. R. <> wrote:
I talk about signing with an official certificate, not stamping the document with an image. And when displaying such a signed document, display the certificate authenticity trail. Nothing in Linux, AFAIK, does that - except proprietary acroread, and it is ancient, so it can not update its master certificates.
There is at least one free (IANAL) toolchain for manipulating PDF (iText) and at least one standalone program using it for document signing (jPdfSign). So if you really need it, you may consider this route.
Thank you. Libre Office can sign the PDF it generates, so there must be free and open methods of doing it. But still I know no method to verify the signatures in Linux. That's what I need. Maybe there is a CLI method separate from readers. -- Cheers / Saludos, Carlos E. R. (from 42.3 x86_64 "Malachite" at Telcontar)