I once built a simple interface around golang's implementation of pgp (golang.org/x/crypto/openpgp). It does not require any database and just take three argum

I once built a simple interface around golang's implementation of pgp (golang.org/x/crypto/openpgp). It does not require any database and just take three arguments: $ ./pgp-verify USAGE: ./pgp-verify file signature publickeyring It will also exit with 0 on success and 1 on failure, which makes it straight-forward to use in scripting.