How to set up git to use the GPG Suite

GPG and git on macOS.md

GPG and git on macOS

Setup

No need for homebrew or anything like that. Works with https://www.git-tower.com and the command line.

1. Install https://gpgtools.org -- I'd suggest to do a customized install and deselect GPGMail.
2. Create or import a key -- see below for https://keybase.io
3. Run gpg --list-secret-keys and look for sec, use the key ID for the next step
4. Configure git to use GPG -- replace the key with the one from gpg --list-secret-keys

git config --global gpg.program /usr/local/MacGPG2/bin/gpg2
git config --global user.signingkey A6B167E1 
git config --global commit.gpgsign true 

1. Optionally configure annotated tags to be GPG signed

git config --global tag.forceSignAnnotated true

1. Add this line to ~/.gnupg/gpg-agent.conf

pinentry-program /usr/local/MacGPG2/libexec/pinentry-mac.app/Contents/MacOS/pinentry-mac

1. Add this line to ~/.gnupg/gpg.conf

no-tty

Keybase.io

Import key to GPG on another host

% keybase pgp export
% keybase pgp export -q CB86A866E870EE00 | gpg --import
% keybase pgp export -q CB86A866E870EE00 --secret | gpg --allow-secret-key-import --import

Add public GPG key to GitHub

% open https://github.com/settings/keys
% keybase pgp export -q CB86A866E440EE00 | pbcopy

See Also

• https://github.com/pstadler/keybase-gpg-github
• /usr/local/MacGPG2 -- this is where MacGPG binaries live
• https://gpgtools.org
• https://www.git-tower.com

If you have already followed the instructions on Git to Generate a new GPG key, and you now want to use GPGTools to manage your key in the keychain, you can use this command to export from gpg (which GnuPG uses) and into gpg2 (which GPGTools uses).

> gpg --list-secret-keys
[keyboxd]
---------
sec   rsa4096 2023-09-16 [SC]
      YOUR_SECRET_KEY_ID
uid           [ unknown] Joe Bloggs <joe@bloggs.com>

> gpg --export-secret-key <YOUR_SECRET_KEY_ID> | gpg2 --import

After running command you will see the key imported into GPG Keychain UI with type sec/pub. I was then able to sign commits automatically via pinentry without entering a password (such as on Github Desktop).

source: https://unix.stackexchange.com/questions/481939/how-to-export-a-gpg-private-key-and-public-key-to-a-file