Well, how about the fact that gnutls allowed passive cleartext recovery attacks to go unpatched for about 2 years?
How about the fact that GnuPG is predicated upon the web of trust which has been demonstrated not to work, encourages misuse in the form of long-lived identities which discourages key rotation, has no ratchets nor forward secrecy, has multiple internal key parsers, and a littany of vulnerabilities involving authentication and downgrade attacks?
GNU is just organizationally incapable of producing secure code. These tools are not good tools. GnuPG in particular offers absolutely nothing that another single-purpose tool doesn't do better, but for some reason people get emotional and mount all kinds of irrational defenses of it. GPG is not good. It is broken at a fundamental level.
>Well, how about the fact that gnutls allowed passive cleartext recovery attacks to go unpatched for about 2 years?
They patched it when they became aware of it in <https://gitlab.com/gnutls/gnutls/-/issues/1011>, it was not "allowed" to go unpatched.
>How about the fact that GnuPG is predicated upon the web of trust
No it is not, the web of trust is one mode of operation out of infinitely many that you can come up with, it's not forced upon the user. It was evangelized for a long time until the keyservers got DOSed. In retrospect obvious, but also gnupg is more-or-less an "activist" project -- big corps and govs are against encryption for the masses by and large. Had it had institutional backing from the beginning (which it never got) it'd have a much more robust model for users to work with.
>encourages misuse in the form of long-lived identities which discourages key rotation
You can automate key rotation with gpg. The long-lived identity argument can be seen as a strength too, short-lived isn't always better.
>a littany of vulnerabilities involving authentication and downgrade attacks?
I'm not aware of these; do you mean that GnuPG is not secure by default in its algorithm list? It chooses compatibility over security, but you're free to change the configuration. I think it's too harsh to say that GnuPG is inadequate because of that.
>GNU is just organizationally incapable of producing secure code.
I don't see why that'd be true, anyone can contribute to GNU so there is nothing inherent about GNU that makes its projects insecure.
>GPG is not good. It is broken at a fundamental level.
Works for me! I use it to sign my git commits and tarball releases, and with gpg-agent I get to authenticate to SSH servers.
>Works for me!
Hey, so long as you're cognizant of the fact that everyone credible thinks GPG is at best a security LARP, do what you feel is best.
What better options are there, if you're aware of these weaknesses i'm sure you're aware of better options.
More in keeping with the Unix philosophy of doing one thing and doing it well (GnuPG in particular does a mediocre job of many things), the best move is to replace it with a suite of single purpose tools.
For example, signing commits with minisign or signify.
>For example, signing commits with minisign or signify.
These tools don't work well with git or the git forges, and they do not work at all with fossil. (Obviously signify is a good choice if you're using OpenBSD.) Furthermore they lock you in entirely in their choice of algorithm, Ed25519, which may not be what you want (Why not Ed448?)
As far as adoption goes, and adoption is hard to get going, GnuPG is what is used in Linux the most...
"Github supports GnuPG signatures" does not contradict the statement "GnuPG is trash". I will not engage further, it's obvious you are not interested in honest discussion of the technical merits.
The issue is mostly with git itself, e.g. take a look at
git cat-file commit HEAD
tree <tree-hash>
parent <parent-hash>
author <author-name> <author-email> <timestamp>
committer <committer-name> <committer-email> <timestamp>
gpgsig -----BEGIN PGP SIGNATURE-----
<ascii-armored RFC9580 signature>
-----END PGP SIGNATURE-----
<commit message>
You can add a patch to git to support more signature types than just OpenPGP. You may then be able to move mountains and get GitHub/others to join in the validation. Finally, if you can find bugs/exploits in GnuPG, you should report them and you will definitely get credit and recognition for them. They are not trivial to find.