@jakmarcin sudo apt install poppler-utils libnss3-tools[1][2]Poppler-utils has pdfsig: verify/add signatures; + pdftotext, pdfseparate, pdftops, pdfunite, ...Libnss3-tools has certutil, signtool, ...There's a PL gov web service for "trusted" signatures, though it violates the GDPR (publishes the signee's PESEL number in the signed pdf) [3][4] (update @UODO ?)[1] https://tracker.debian.org/pkg/poppler[2] https://tracker.debian.org/pkg/nss[3] https://www.gov.pl/web/gov/podpisz-dokument-elektronicznie-wykorzystaj-podpis-zaufany[4] https://www.uodo.gov.pl/pl/138/3373
J
