67108933 Not implemented <GPG Agent>

[marcofranssen]

Behaviour

Steps to reproduce this issue

1. Create a key with subkeys.
2. Add a subkey for signing using ecdsa.
3. Add a subkey for signing using RSA.
4. export the key using ascii armor. gpg --armor --export-secret-keys KEYID | pbcopy
5. add the key as a secret for this workflow.
6. add the passphrase as a secret in github for this workflow.

In this workflow I am selecting the RSA subkey for signing.

Expected behaviour

The key should successfully load into the gpg-agent.

Actual behaviour

Running this workflow fails with following log

Configuring GnuPG agent
::group::Getting keygrip for fingerprint
Getting keygrip for fingerprint
Error: ERR 67108933 Not implemented <GPG Agent>

Configuration

• Repository URL (if public): https://github.com/marcofranssen/terraform-provider-curl
• Build URL (if public): https://github.com/marcofranssen/terraform-provider-curl/actions/runs/2785634489

name: release
on:
  push:

jobs:
  release-provider:
    runs-on: ubuntu-22.04

    permissions:
      contents: write

    steps:
      - name: Checkout
        uses: actions/checkout@v3.0.2
        with:
          fetch-depth: 0

      - name: Set up Go
        uses: actions/setup-go@v3.2.1
        with:
          go-version-file: 'go.mod'
          check-latest: true
          cache: true

      - name: Import GPG key
        uses: crazy-max/ghaction-import-gpg@v5.0.0
        id: gpg
        with:
          gpg_private_key: ${{ secrets.GPG_PRIVATE_KEY }}
          passphrase: ${{ secrets.PASSPHRASE }}
          fingerprint: EA0A37E819AFBAE6

    …
    …
    …

Logs

See attached build URL.

[marcofranssen]

Looking at the log and the related code it seems it fails retrieving the keygrip.

https://github.com/crazy-max/ghaction-import-gpg/blob/master/src/main.ts#L77

In the logs you will see there is no keygrip printed, meaning https://github.com/crazy-max/ghaction-import-gpg/blob/master/src/main.ts#L76 probably failed getting the keygrip.

[marcofranssen]

I finally figured it out. I was using the subkey id as opposed to the subkey fingerprint. Now I'm using the subkey fingerprint all works perfect.

I figured it out when reading this code.

ghaction-import-gpg/src/gpg.ts

Lines 184 to 193 in c8bb57c

	export const getKeygrip = async (fingerprint: string): Promise<string> => {
	return await exec
	.getExecOutput('gpg', ['--batch', '--with-colons', '--with-keygrip', '--list-secret-keys', fingerprint], {
	ignoreReturnCode: true,
	silent: true
	})
	.then(res => {
	return parseKeygripFromGpgColonsOutput(res.stdout, fingerprint);
	});
	};

Probably would be good to document how to get the fingerprint of a given subkey id.

I did this via following command.

gpg --batch --with-colons --with-keygrip --list-secret-keys | awk -F: "/^fpr:.*AE0B37D819AFABE6:/ { print $10 }"

The keyid AE0B37D819AFABE6 I must be replaced with your own subkey ID ofcourse. Not sure if there is an easier way of getting this.

[bertramn]

I am running into the same issue but adding the full fingerprint still does not make it work. You can get the fingerprint of subkeys like that:

gpg -K --with-subkey-fingerprint <your.key@example.com>