this post was submitted on 05 Sep 2023
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Decoupling GPG from Git (programming.dev)
submitted 1 year ago by danhab99@programming.dev to c/git@programming.dev
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Over the last year I've been trying to understand why GPG isn't popular. Based on the features I think it's a pretty valid thing. This article changed my mind.

Turns out GPG is too old ¯_(ツ)_/¯

I like signing my commits, it feels good to know that my identity is actually attached to my code. So I put in some work to reconfigure git to use a different signing tool, I didn't think it would be such a big deal, turns out git fully intergrates GPG. I'm confused. Why does git need to be hardcoded to use GPG specifically?

What rule says we can't have git configs like:

[sigining]
  defaultMethod=minisign

[signing.minisign]
  always=true
  signCommand=minisign -S -s {secret-key-file} -x {sig-file-name} -m {target-file}
  verifyCommand=minisign -V -P {public-key-file} -m {target-file}

Where the verifyCommand exits 0 if the signature is good and 1 if not.

I'm open to hearing cons. These are some I can think of:

  • User's have to configure git with each signing and verifying program
  • Upstream security conserns from signing programs
  • Signing programs changing their interfaces
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[–] metiulekm@sh.itjust.works 2 points 1 year ago

Just wanted to say that you actually can sign git commits using SSH keys! :) It's nowhere close to being as flexible as what you suggest, but it's also not GPG, so there's that.

[–] jnareb@programming.dev 2 points 11 months ago (1 children)

There was a proposal to add universal signing to Git in 2021, but I think it went nowhere for various reasons (like breaking SHA-1 <-> SHA-256 signing interoperability, if I understand the discussion correctly).

[–] danhab99@programming.dev 1 points 11 months ago

That's kind of a bummer