pdfsig(1) on Linux
The text 6b93065b7eaa, as Debian 12 (Bookworm) shipped it.
Portable Document Format (PDF) digital signatures tool
Flags it lists
-
-add-signature -
-aia -
-digest -
-dump -
-etsi -
-h -
-kpw -
-list-nicks -
-new-signature-field-name -
-nick -
-no-ocsp -
-nocert -
-nss-pwd -
-nssdir -
-reason -
-sign -
-v