ci: build + sign workflow for Windows release (Azure Key Vault + jsign)

Add Gitea Actions workflow that builds wraith.exe for Windows amd64,
signs it with an Azure Key Vault certificate via jsign, and uploads
the signed binary with a version.json manifest.

Also adds a `version` var to main.go for -ldflags injection at build time.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

.gitea/workflows/build-release.yml

@@ -0,0 +1,185 @@
+# =============================================================================
+# Wraith — Build & Sign Release
+# =============================================================================
+# Builds the Wails v3 desktop app for Windows amd64, signs it with an
+# Azure Key Vault code-signing certificate via jsign, then uploads the
+# signed binary and version manifest as release artifacts.
+#
+# Trigger: push a tag matching v* (e.g. v1.0.0) or run manually.
+#
+# Required secrets:
+#   AZURE_TENANT_ID      — Azure AD tenant
+#   AZURE_CLIENT_ID      — Service principal client ID
+#   AZURE_CLIENT_SECRET   — Service principal secret
+#   AZURE_KEY_VAULT_URL   — e.g. https://my-vault.vault.azure.net
+#   AZURE_CERT_NAME       — Certificate/key name in the vault
+#   GIT_TOKEN             — PAT for cloning private repo
+# =============================================================================
+
+name: Build & Sign Wraith
+
+on:
+  push:
+    tags:
+      - 'v*'
+  workflow_dispatch:
+
+jobs:
+  build-and-sign:
+    name: Build Windows + Sign
+    runs-on: linux
+    steps:
+      # ---------------------------------------------------------------
+      # Checkout
+      # ---------------------------------------------------------------
+      - name: Checkout code
+        run: |
+          git clone --depth 1 --branch ${{ github.ref_name }} \
+            https://${{ secrets.GIT_TOKEN }}@git.command.vigilcyber.com/vigilcyber/wraith.git .
+
+      # ---------------------------------------------------------------
+      # Extract version from tag
+      # ---------------------------------------------------------------
+      - name: Get version from tag
+        id: version
+        run: |
+          # Strip leading "v" from the tag (v1.2.3 -> 1.2.3)
+          TAG=$(echo "${{ github.ref_name }}" | sed 's/^v//')
+          echo "version=${TAG}" >> $GITHUB_OUTPUT
+          echo "Building version: ${TAG}"
+
+      # ---------------------------------------------------------------
+      # Install toolchain: Go, Node, npm
+      # ---------------------------------------------------------------
+      - name: Install Node.js
+        run: |
+          # Install Node.js LTS if not present
+          if ! command -v node >/dev/null 2>&1; then
+            curl -fsSL https://deb.nodesource.com/setup_22.x | bash -
+            apt-get install -y -qq nodejs
+          fi
+          node --version
+          npm --version
+
+      # ---------------------------------------------------------------
+      # Build frontend assets
+      # ---------------------------------------------------------------
+      - name: Build frontend
+        run: |
+          cd frontend
+          npm ci
+          npm run build
+          echo "Frontend build complete:"
+          ls -la dist/
+
+      # ---------------------------------------------------------------
+      # Build Windows amd64 binary
+      # ---------------------------------------------------------------
+      # Wails v3 cross-compilation from Linux to Windows requires CGO
+      # for the webview2 bindings. Rather than pull in a full MinGW
+      # cross-compiler, we build the Go binary directly — the frontend
+      # assets are embedded via //go:embed in main.go, so the result is
+      # a single self-contained .exe.
+      # ---------------------------------------------------------------
+      - name: Build wraith.exe (Windows amd64)
+        run: |
+          VERSION="${{ steps.version.outputs.version }}"
+          echo "=== Cross-compiling wraith.exe for Windows amd64 ==="
+
+          mkdir -p dist
+
+          GOOS=windows GOARCH=amd64 CGO_ENABLED=0 \
+            go build \
+              -ldflags="-s -w -X main.version=${VERSION}" \
+              -o dist/wraith.exe \
+              .
+
+          ls -la dist/wraith.exe
+
+      # ---------------------------------------------------------------
+      # Code signing — jsign + Azure Key Vault
+      # ---------------------------------------------------------------
+      - name: Install jsign
+        run: |
+          # jsign: Java-based Authenticode signing tool that runs on
+          # Linux and supports Azure Key Vault as a keystore.
+          JSIGN_VERSION="7.0"
+          curl -sSL -o /usr/local/bin/jsign.jar \
+            "https://github.com/ebourg/jsign/releases/download/${JSIGN_VERSION}/jsign-${JSIGN_VERSION}.jar"
+
+          # Ensure a JRE is available (jsign needs Java)
+          command -v java >/dev/null 2>&1 || {
+            apt-get update -qq && apt-get install -y -qq default-jre-headless
+          }
+
+      - name: Get Azure Key Vault access token
+        id: azure-token
+        run: |
+          # OAuth2 client credentials flow for Azure Key Vault access
+          TOKEN=$(curl -s -X POST \
+            "https://login.microsoftonline.com/${{ secrets.AZURE_TENANT_ID }}/oauth2/v2.0/token" \
+            -d "client_id=${{ secrets.AZURE_CLIENT_ID }}" \
+            -d "client_secret=${{ secrets.AZURE_CLIENT_SECRET }}" \
+            -d "scope=https://vault.azure.net/.default" \
+            -d "grant_type=client_credentials" \
+            | python3 -c "import sys,json; print(json.load(sys.stdin)['access_token'])")
+          echo "::add-mask::${TOKEN}"
+          echo "token=${TOKEN}" >> $GITHUB_OUTPUT
+
+      - name: Sign wraith.exe
+        run: |
+          echo "=== Signing wraith.exe with Azure Key Vault certificate ==="
+          java -jar /usr/local/bin/jsign.jar \
+            --storetype AZUREKEYVAULT \
+            --keystore "${{ secrets.AZURE_KEY_VAULT_URL }}" \
+            --storepass "${{ steps.azure-token.outputs.token }}" \
+            --alias "${{ secrets.AZURE_CERT_NAME }}" \
+            --tsaurl http://timestamp.digicert.com \
+            --tsmode RFC3161 \
+            dist/wraith.exe
+          echo "Signing complete."
+
+      # ---------------------------------------------------------------
+      # Version manifest
+      # ---------------------------------------------------------------
+      - name: Create version.json
+        run: |
+          VERSION="${{ steps.version.outputs.version }}"
+          SHA256=$(sha256sum dist/wraith.exe | awk '{print $1}')
+
+          cat > dist/version.json << EOF
+          {
+            "version": "${VERSION}",
+            "filename": "wraith.exe",
+            "sha256": "${SHA256}",
+            "platform": "windows",
+            "architecture": "amd64",
+            "released": "$(date -u +"%Y-%m-%dT%H:%M:%SZ")",
+            "signed": true
+          }
+          EOF
+
+          echo "=== version.json ==="
+          cat dist/version.json
+
+      # ---------------------------------------------------------------
+      # Upload release artifacts
+      # ---------------------------------------------------------------
+      - name: Upload release artifacts
+        run: |
+          VERSION="${{ steps.version.outputs.version }}"
+          ENDPOINT="https://files.command.vigilcyber.com"
+
+          echo "=== Uploading Wraith ${VERSION} ==="
+
+          # Versioned path
+          aws s3 cp dist/ "s3://agents/wraith/${VERSION}/windows/amd64/" \
+            --recursive --endpoint-url "$ENDPOINT" --no-sign-request
+
+          # Latest path (overwritten on each release)
+          aws s3 sync dist/ "s3://agents/wraith/latest/windows/amd64/" \
+            --delete --endpoint-url "$ENDPOINT" --no-sign-request
+
+          echo "=== Upload complete ==="
+          echo "Versioned: ${ENDPOINT}/agents/wraith/${VERSION}/windows/amd64/"
+          echo "Latest:    ${ENDPOINT}/agents/wraith/latest/windows/amd64/"

main.go

@@ -9,6 +9,9 @@ import (
 	"github.com/wailsapp/wails/v3/pkg/application"
 )
 
+// version is set at build time via -ldflags "-X main.version=..."
+var version = "dev"
+
 //go:embed all:frontend/dist
 var assets embed.FS