Genarate GPG key

If you don't have an own GPG key, generate one with this command:

gpg --gen-key

Note: Name and email address of GPG key should match your Git settings which you use to commit (user.name and user.email), otherwise Gitea won't show your commits "trusted". Additionally, the configured email address should be listed on your Gitea profile (your avatar -> Settings -> Account): https://gitea.e5tv.hu/user/settings/account, otherwise you won't be able to add the public key to Gitea.

After the key is generated, you will see a summary about the new key:

pub   rsa3072 2021-05-09 [SC] [expires: 2023-05-09]
      DADC33A688BA1D2983BA6AA521BE5534738520D0
uid                      John Doe <john.doe@example.com>
sub   rsa3072 2021-05-09 [E] [expires: 2023-05-09]

You can get this information about your keys with the this command:

gpg --list-keys

Configure Git to use the key

Configure Git to use this key to sign your work:

git config --global user.signingkey <key-id> # DADC33A688BA1D2983BA6AA521BE5534738520D0 in this example

Recommended: Configure Git to automatically sign your commits and tags:

git config --global commit.gpgSign true
git config --global tag.gpgSign true

If you don't configure the automatic signing, you have to manually request it for each commit/tag.

You can find further information about Git & GPG signing here: https://git-scm.com/book/en/v2/Git-Tools-Signing-Your-Work.

Configure Gitea to recognize your GPG key

Retrieve your GPG public key with this command:

gpg --export -a <key-id> # DADC33A688BA1D2983BA6AA521BE5534738520D0 in this example

The output of the above command should be copied to your Gitea profile. Navigate to this page (your avatar -> Settings -> SSH / GPG keys): https://gitea.e5tv.hu/user/settings/keys. Click on Add Key next to Manage GPG Keys and paste your public key.

If a pull request contains only signed commits, it is possible to sign the merge commit with Gitea's key. Two factor authentication should be activated on your profile for this! You can activate it on this page (your avatar -> Settings -> Security): https://gitea.e5tv.hu/user/settings/security.