git github ssh gpg

github_ssh_gpg.txt

- To properly use github, it is important to add SSH and GPG keys
- to respectively connect (allowing git push/pull/clone) to github and
- sign commits (allowing git commit -S) adding a "verified" tag to it

- Using SSH key to connect sometimes requires to go thru port 443 instead of
- port 22 when accessing github:

- Edit ssh config to use port 443 https when accessing github via ssh
- and also to use ssh key (must be the same added in github):

$ emacs -nw ~/.ssh/config

Host github.com
    User git
    Hostname ssh.github.com
    Port 443
    PreferredAuthentications publickey
    IdentityFile <full path to id_rsa private key>

- Replace to use https instead of git protocol:

$ git config --global url."https://".insteadOf git://

- Test github can be accessed:

$ ssh -T [email protected]

- Generate 1 gpg key:

$ gpg --full-generate-key

-- List secret keys

$ gpg --list-secret-keys --keyid-format=long

/home/andmax/.gnupg/pubring.kbx
-------------------------------
sec   rsa4096/<private key> 2023-11-19 [SC] [expires: 2024-11-18]
      <public key>
uid                 [ultimate] Andre Maximo <[email protected]>
ssb   rsa4096/B895BCFB6B153C44 2023-11-19 [E] [expires: 2024-11-18]

-- Show public key block (to add it in github):

$ gpg --armor --export <key>

-- Set up gpg passphrase entry to use terminal via env. var.:

$ export GPG_TTY=$(tty)