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robertodr's avatar
robertodr
Occasional Contributor
3 years ago

Git commit signing fails with `error: failed to fill whole buffer`

I've updated to Git 2.40.1 and it seems that broke commit signing. Prepending GIT_TRACE=2 to git commit gives as last message: 20:09:00.367459 run-command.c:655 trace: run_command: op...
SSH
robertodr's avatar
robertodr
Occasional Contributor
3 years ago

Running this:

SSH_AUTH_SOCK=~/.1password/agent.sock ssh-add -L | grep "$(git config user.signingkey)"

returns nothing, even though the output of SSH_AUTH_SOCK=~/.1password/agent.sock ssh-add -L:

ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIAeqrr+kvXVWD+BdrP49t8ul/wvKQyXQ/bavjT5JJoLK JumpCloud
ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIODV5S21+jV0900ubPoYvdHol/xfbJjVhxayuMEFuPKo GitHub signing key

clearly contains the output of "$(git config user.signingkey)":

ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIODV5S21+jV0900ubPoYvdHol/xfbJjVhxayuMEFuPKo

And with the shim for ssh-keygen:
```
git commit --allow-empty -m "foo" -S

error: Signing file /tmp/.git_signing_buffer_tmpNpihD5
Couldn't sign message (signer): communication with agent failed?
Signing /tmp/.git_signing_buffer_tmpNpihD5 failed: communication with agent failed?

fatal: failed to write commit object
```