input to set private key trust level

.github/workflows/ci.yml

@@ -55,6 +55,7 @@ jobs:
             if (!fs.existsSync(gnupgfolder)){
                 fs.mkdirSync(gnupgfolder);
             }
+            fs.chmodSync(gnupgfolder, '0700');
             fs.copyFile('__tests__/fixtures/gpg.conf', `${gnupgfolder}/gpg.conf`, (err) => {
                 if (err) throw err;
             });
@@ -69,11 +70,11 @@ jobs:
             core.setOutput('passphrase', fs.readFileSync('__tests__/fixtures/${{ matrix.key }}.pass', {encoding: 'utf8'}));
       -
         name: Import GPG
-        id: import_gpg
         uses: ./
         with:
           gpg_private_key: ${{ steps.test.outputs.pgp }}
           passphrase: ${{ steps.test.outputs.passphrase }}
+          trust_level: 5
           git_config_global: ${{ matrix.global }}
           git_user_signingkey: true
           git_commit_gpgsign: true
@@ -116,7 +117,6 @@ jobs:
             core.setOutput('passphrase', fs.readFileSync('__tests__/fixtures/${{ matrix.key }}.pass', {encoding: 'utf8'}));
       -
         name: Import GPG
-        id: import_gpg
         uses: ./
         with:
           gpg_private_key: ${{ steps.test.outputs.pgp-base64 }}
@@ -126,3 +126,62 @@ jobs:
           git_tag_gpgsign: true
           git_push_gpgsign: if-asked
           fingerprint: ${{ matrix.fingerprint }}
+
+  trust:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        key:
+          - test-key
+        level:
+          - ''
+          - 5
+          - 4
+          - 3
+          - 2
+          - 1
+        os:
+          - ubuntu-latest
+          - macOS-latest
+          - windows-latest
+    steps:
+      -
+        name: Checkout
+        uses: actions/checkout@v3
+      -
+        name: GPG conf
+        uses: actions/github-script@v6
+        with:
+          script: |
+            const fs = require('fs');
+            const gnupgfolder = `${require('os').homedir()}/.gnupg`;
+            if (!fs.existsSync(gnupgfolder)){
+                fs.mkdirSync(gnupgfolder);
+            }
+            fs.chmodSync(gnupgfolder, '0700');
+            fs.copyFile('__tests__/fixtures/gpg.conf', `${gnupgfolder}/gpg.conf`, (err) => {
+                if (err) throw err;
+            });
+      -
+        name: Get test key and passphrase
+        uses: actions/github-script@v6
+        id: test
+        with:
+          script: |
+            const fs = require('fs');
+            core.setOutput('pgp', fs.readFileSync('__tests__/fixtures/${{ matrix.key }}.pgp', {encoding: 'utf8'}));
+            core.setOutput('passphrase', fs.readFileSync('__tests__/fixtures/${{ matrix.key }}.pass', {encoding: 'utf8'}));
+      -
+        name: Import GPG
+        id: import_gpg
+        uses: ./
+        with:
+          gpg_private_key: ${{ steps.test.outputs.pgp }}
+          passphrase: ${{ steps.test.outputs.passphrase }}
+          trust_level: ${{ matrix.level }}
+      -
+        name: List trust values
+        run: |
+          gpg --export-ownertrust
+        shell: bash

README.md

@@ -19,6 +19,7 @@ ___
   * [Workflow](#workflow)
   * [Sign commits](#sign-commits)
   * [Use a subkey](#use-a-subkey)
+  * [Set key's trust level](#set-keys-trust-level)
 * [Customizing](#customizing)
   * [inputs](#inputs)
   * [outputs](#outputs)
@@ -76,7 +77,6 @@ jobs:
         uses: actions/checkout@v3
       -
         name: Import GPG key
-        id: import_gpg
         uses: crazy-max/ghaction-import-gpg@v5
         with:
           gpg_private_key: ${{ secrets.GPG_PRIVATE_KEY }}
@@ -139,7 +139,6 @@ jobs:
         uses: actions/checkout@v3
       -
         name: Import GPG key
-        id: import_gpg
         uses: crazy-max/ghaction-import-gpg@v5
         with:
           gpg_private_key: ${{ secrets.GPG_PRIVATE_KEY }}
@@ -164,26 +163,63 @@ sub   ed25519 2021-09-24 [S]
 
 You can use the subkey with signing capability whose fingerprint is `C17D11ADF199F12A30A0910F1F80449BE0B08CB8`.
 
+### Set key's trust level
+
+With the `trust_level` input, you can specify the trust level of the GPG key.
+
+Valid values are:
+* `1`: unknown
+* `2`: never
+* `3`: marginal
+* `4`: full
+* `5`: ultimate
+
+```yaml
+name: import-gpg
+
+on:
+  push:
+    branches: master
+
+jobs:
+  import-gpg:
+    runs-on: ubuntu-latest
+    steps:
+      -
+        name: Checkout
+        uses: actions/checkout@v3
+      -
+        name: Import GPG key
+        uses: crazy-max/ghaction-import-gpg@v5
+        with:
+          gpg_private_key: ${{ secrets.GPG_PRIVATE_KEY }}
+          passphrase: ${{ secrets.PASSPHRASE }}
+          trust_level: 5
+```
+
 ## Customizing
 
 ### inputs
 
 Following inputs can be used as `step.with` keys
 
-| Name                                  | Type    | Description                                    |
+| Name                  | Type   | Description                                                                                |
-|---------------------------------------|---------|------------------------------------------------|
+|-----------------------|--------|--------------------------------------------------------------------------------------------|
-| `gpg_private_key`                     | String  | GPG private key exported as an ASCII armored version or its base64 encoding (**required**) |
+| `gpg_private_key`     | String | GPG private key exported as an ASCII armored version or its base64 encoding (**required**) |
-| `passphrase`                          | String  | Passphrase of the GPG private key |
+| `passphrase`          | String | Passphrase of the GPG private key                                                          |
-| `git_config_global`                   | Bool    | Set Git config global (default `false`) |
+| `trust_level`         | String | Set key's trust level                                                                      |
-| `git_user_signingkey`                 | Bool    | Set GPG signing keyID for this Git repository (default `false`) |
+| `git_config_global`   | Bool   | Set Git config global (default `false`)                                                    |
-| `git_commit_gpgsign`                  | Bool    | Sign all commits automatically. (default `false`) |
+| `git_user_signingkey` | Bool   | Set GPG signing keyID for this Git repository (default `false`)                            |
-| `git_tag_gpgsign`                     | Bool    | Sign all tags automatically. (default `false`) |
+| `git_commit_gpgsign`  | Bool   | Sign all commits automatically. (default `false`)                                          |
-| `git_push_gpgsign`                    | String  | Sign all pushes automatically. (default `if-asked`) |
+| `git_tag_gpgsign`     | Bool   | Sign all tags automatically. (default `false`)                                             |
-| `git_committer_name`                  | String  | Set commit author's name (defaults to the name associated with the GPG key) |
+| `git_push_gpgsign`    | String | Sign all pushes automatically. (default `if-asked`)                                        |
-| `git_committer_email`                 | String  | Set commit author's email (defaults to the email address associated with the GPG key) |
+| `git_committer_name`  | String | Set commit author's name (defaults to the name associated with the GPG key)                |
-| `workdir`                             | String  | Working directory (below repository root) (default `.`) |
+| `git_committer_email` | String | Set commit author's email (defaults to the email address associated with the GPG key)      |
-| `fingerprint`                         | String  | Specific fingerprint to use (subkey) |
+| `workdir`             | String | Working directory (below repository root) (default `.`)                                    |
+| `fingerprint`         | String | Specific fingerprint to use (subkey)                                                       |
 
+> **Note**
+>
 > `git_user_signingkey` needs to be enabled for `git_commit_gpgsign`, `git_tag_gpgsign`,
 > `git_push_gpgsign`, `git_committer_name`, `git_committer_email` inputs.
 
@@ -191,12 +227,12 @@ Following inputs can be used as `step.with` keys
 
 Following outputs are available
 
-| Name          | Type    | Description                           |
+| Name          | Type   | Description                                                                                                                     |
-|---------------|---------|---------------------------------------|
+|---------------|--------|---------------------------------------------------------------------------------------------------------------------------------|
-| `fingerprint` | String  | Fingerprint of the GPG key (recommended as [user ID](https://www.gnupg.org/documentation/manuals/gnupg/Specify-a-User-ID.html)) |
+| `fingerprint` | String | Fingerprint of the GPG key (recommended as [user ID](https://www.gnupg.org/documentation/manuals/gnupg/Specify-a-User-ID.html)) |
-| `keyid`       | String  | Low 64 bits of the X.509 certificate SHA-1 fingerprint |
+| `keyid`       | String | Low 64 bits of the X.509 certificate SHA-1 fingerprint                                                                          |
-| `name`        | String  | Name associated with the GPG key       |
+| `name`        | String | Name associated with the GPG key                                                                                                |
-| `email`       | String  | Email address associated with the GPG key |
+| `email`       | String | Email address associated with the GPG key                                                                                       |
 
 ## Contributing
 

__tests__/gpg.test.ts

@@ -107,10 +107,10 @@ for (const userInfo of userInfos) {
     describe('getKeygrip', () => {
       it('returns the keygrip for a given fingerprint', async () => {
         await gpg.importKey(userInfo.pgp);
-        for (const [i, fingerprint] of userInfo.fingerprints.entries()) {
+        for (const {idx, fingerprint} of userInfo.fingerprints.map((fingerprint, idx) => ({idx, fingerprint}))) {
           await gpg.getKeygrip(fingerprint).then(keygrip => {
-            expect(keygrip.length).toEqual(userInfo.keygrips[i].length);
+            expect(keygrip.length).toEqual(userInfo.keygrips[idx].length);
-            expect(keygrip).toEqual(userInfo.keygrips[i]);
+            expect(keygrip).toEqual(userInfo.keygrips[idx]);
           });
         }
       });
@@ -128,6 +128,16 @@ for (const userInfo of userInfos) {
       });
     });
 
+    describe('setTrustLevel', () => {
+      it('set trust level', async () => {
+        await gpg.importKey(userInfo.pgp);
+        await gpg.configureAgent(gpg.agentConfig);
+        expect(() => {
+          gpg.setTrustLevel(userInfo.keyID, '5');
+        }).not.toThrow();
+      });
+    });
+
     describe('deleteKey', () => {
       // eslint-disable-next-line jest/expect-expect
       it('removes key from GnuPG', async () => {

action.yml

@@ -13,6 +13,9 @@ inputs:
   passphrase:
     description: 'Passphrase of the GPG private key'
     required: false
+  trust_level:
+    description: "Set key's trust level"
+    required: false
   git_config_global:
     description: 'Set Git config global'
     default: 'false'

src/context.ts

@@ -3,6 +3,7 @@ import * as core from '@actions/core';
 export interface Inputs {
   gpgPrivateKey: string;
   passphrase: string;
+  trustLevel: string;
   gitConfigGlobal: boolean;
   gitUserSigningkey: boolean;
   gitCommitGpgsign: boolean;
@@ -18,6 +19,7 @@ export async function getInputs(): Promise<Inputs> {
   return {
     gpgPrivateKey: core.getInput('gpg_private_key', {required: true}),
     passphrase: core.getInput('passphrase'),
+    trustLevel: core.getInput('trust_level'),
     gitConfigGlobal: core.getBooleanInput('git_config_global'),
     gitUserSigningkey: core.getBooleanInput('git_user_signingkey'),
     gitCommitGpgsign: core.getBooleanInput('git_commit_gpgsign'),

src/gpg.ts

@@ -206,6 +206,20 @@ export const presetPassphrase = async (keygrip: string, passphrase: string): Pro
   return await gpgConnectAgent(`KEYINFO ${keygrip}`);
 };
 
+export const setTrustLevel = async (keyID: string, trust: string): Promise<void> => {
+  await exec
+    .getExecOutput('gpg', ['--batch', '--no-tty', '--command-fd', '0', '--edit-key', keyID], {
+      ignoreReturnCode: true,
+      silent: true,
+      input: Buffer.from(`trust\n${trust}\ny\nquit\n`)
+    })
+    .then(res => {
+      if (res.stderr.length > 0 && res.exitCode != 0) {
+        throw new Error(res.stderr);
+      }
+    });
+};
+
 export const deleteKey = async (fingerprint: string): Promise<void> => {
   await exec
     .getExecOutput('gpg', ['--batch', '--yes', '--delete-secret-keys', fingerprint], {

src/main.ts

@@ -81,6 +81,14 @@ async function run(): Promise<void> {
       });
     }
 
+    if (inputs.trustLevel) {
+      await core.group(`Setting key's trust level`, async () => {
+        await gpg.setTrustLevel(privateKey.keyID, inputs.trustLevel).then(() => {
+          core.info(`Trust level set to ${inputs.trustLevel} for ${privateKey.keyID}`);
+        });
+      });
+    }
+
     await core.group(`Setting outputs`, async () => {
       core.info(`fingerprint=${fingerprint}`);
       core.setOutput('fingerprint', fingerprint);