From 9669b94922ae0d57b3579f1c9ffaab086868a0bf Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Tao=20Bojl=C3=A9n?= <git@btao.org>
Date: Sun, 21 Jun 2026 12:20:57 +0100
Subject: [PATCH] ci: add zizmor GitHub Actions security analysis

Add a zizmor workflow that audits GitHub Actions on push/PR to main,
mirroring the setup in shroud.email (adapted to ubuntu-latest runners).

Manage pinact + zizmor via mise, pin all action references to commit
SHAs with pinact, and set persist-credentials: false on the build
checkout to satisfy zizmor's artipacked audit.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
---
 .github/workflows/build.yml  | 12 +++++++-----
 .github/workflows/zizmor.yml | 27 +++++++++++++++++++++++++++
 mise.toml                    |  3 +++
 3 files changed, 37 insertions(+), 5 deletions(-)
 create mode 100644 .github/workflows/zizmor.yml
 create mode 100644 mise.toml

diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 55271da..2cc202f 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -17,22 +17,24 @@ jobs:
     permissions:
       packages: write
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@f43a0e5ff2bd294095638e18286ca9a3d1956744 # v3.6.0
+        with:
+          persist-credentials: false
       - name: Log in to the container registry
-        uses: docker/login-action@v2
+        uses: docker/login-action@465a07811f14bebb1938fbed4728c6a1ff8901fc # v2.2.0
         with:
           registry: ${{ env.REGISTRY }}
           username: ${{ github.actor }}
           password: ${{ secrets.GITHUB_TOKEN }}
       - name: Extract metadata (tags, labels) for Docker
         id: meta
-        uses: docker/metadata-action@v4
+        uses: docker/metadata-action@818d4b7b91585d195f67373fd9cb0332e31a7175 # v4.6.0
         with:
           images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
       - name: Setup Docker buildx
-        uses: docker/setup-buildx-action@v2
+        uses: docker/setup-buildx-action@885d1462b80bc1c1c7f0b00334ad271f09369c55 # v2.10.0
       - name: Build container
-        uses: docker/build-push-action@v3
+        uses: docker/build-push-action@1104d471370f9806843c095c1db02b5a90c5f8b6 # v3.3.1
         with:
           context: ./haraka
           push: true
diff --git a/.github/workflows/zizmor.yml b/.github/workflows/zizmor.yml
new file mode 100644
index 0000000..19821bc
--- /dev/null
+++ b/.github/workflows/zizmor.yml
@@ -0,0 +1,27 @@
+name: GitHub Actions Security Analysis with zizmor 🌈
+
+on:
+  push:
+    branches: ["main"]
+  pull_request:
+    branches: ["main"]
+
+permissions: {}
+
+jobs:
+  zizmor:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      actions: read
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
+        with:
+          persist-credentials: false
+
+      - name: Run zizmor 🌈
+        uses: zizmorcore/zizmor-action@5f14fd08f7cf1cb1609c1e344975f152c7ee938d # v0.5.6
+        with:
+          advanced-security: false
+          annotations: true
diff --git a/mise.toml b/mise.toml
new file mode 100644
index 0000000..e7dbdbb
--- /dev/null
+++ b/mise.toml
@@ -0,0 +1,3 @@
+[tools]
+pinact = "4.1.0"
+zizmor = "1.25.2"