ci: add Linux packaging workflow and target-aware build scripts

- Add package-linux.yml: builds tarball and .deb for x86_64 and aarch64
  on v* tag push, uploads artifacts to GitHub release with checksums
- Make build-tarball.sh target-aware: --target, --version, --arch, --no-build
- Make build-deb.sh target-aware: --target, --version, --no-build
- Configurable strip binary via STRIP env var

.github/workflows/package-linux.yml

@@ -0,0 +1,196 @@
+name: Linux Package
+on:
+  push:
+    tags:
+      - "v*"
+  workflow_dispatch:
+
+env:
+  CARGO_TERM_COLOR: always
+
+jobs:
+  determine-versioning:
+    runs-on: ubuntu-latest
+    outputs:
+      linux_package_version: ${{ steps.linux_version.outputs.linux_package_version }}
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Derive Linux package version
+        id: linux_version
+        shell: bash
+        run: |
+          : ${GITHUB_OUTPUT:=/tmp/github_output}
+
+          BASE_VERSION=$(grep '^version' Cargo.toml | head -1 | sed 's/.*"\(.*\)"/\1/')
+          if [[ "$GITHUB_REF" == refs/tags/* ]]; then
+            VERSION="${GITHUB_REF_NAME#v}"
+          else
+            BRANCH=$(echo "$GITHUB_REF_NAME" | sed 's|[^A-Za-z0-9]|.|g; s/\.\.+/./g; s/^\.//; s/\.$//')
+            HEIGHT=$(git rev-list --count HEAD)
+            HASH=$(git rev-parse --short HEAD)
+            if [[ -z "$BRANCH" ]]; then
+              BRANCH="ref"
+            fi
+            VERSION="${BASE_VERSION}+${BRANCH}.${HEIGHT}.${HASH}"
+          fi
+
+          echo "linux_package_version=${VERSION}" >> "$GITHUB_OUTPUT"
+
+  build:
+    name: Build Linux artifacts (${{ matrix.artifact_arch }})
+    runs-on: ${{ matrix.os }}
+    needs: determine-versioning
+
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - os: ubuntu-latest
+            artifact_arch: x86_64
+            deb_arch: amd64
+          - os: ubuntu-24.04-arm
+            artifact_arch: aarch64
+            deb_arch: arm64
+
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Set SOURCE_DATE_EPOCH from git
+        run: echo "SOURCE_DATE_EPOCH=$(git log -1 --format=%ct)" >> "$GITHUB_ENV"
+
+      - name: Install system dependencies
+        run: sudo apt-get update && sudo apt-get install -y --no-install-recommends libdbus-1-dev llvm
+
+      - name: Install Rust toolchain
+        uses: dtolnay/rust-toolchain@stable
+
+      - name: Cache Cargo registry + build
+        if: ${{ env.ACT != 'true' }}
+        uses: actions/cache@v4
+        with:
+          path: |
+            ~/.cargo/registry
+            ~/.cargo/git
+            target
+          key: linux-release-${{ runner.os }}-${{ matrix.artifact_arch }}-${{ hashFiles('**/Cargo.lock') }}
+          restore-keys: |
+            linux-release-${{ runner.os }}-${{ matrix.artifact_arch }}-
+
+      - name: Install cargo-deb
+        run: cargo install cargo-deb --version 3.6.3 --locked
+
+      - name: Build release binaries
+        run: cargo build --release
+
+      - name: Build systemd tarball
+        env:
+          STRIP: llvm-strip
+        run: |
+          packaging/systemd/build-tarball.sh \
+            --version "${{ needs.determine-versioning.outputs.linux_package_version }}" \
+            --arch "${{ matrix.artifact_arch }}" \
+            --no-build
+
+      - name: Build Debian package
+        run: |
+          packaging/debian/build-deb.sh \
+            --version "${{ needs.determine-versioning.outputs.linux_package_version }}" \
+            --no-build
+
+      - name: Resolve Linux asset paths
+        id: linux-assets
+        shell: bash
+        run: |
+          : ${GITHUB_OUTPUT:=/tmp/github_output}
+
+          TARBALL="deploy/fips-${{ needs.determine-versioning.outputs.linux_package_version }}-linux-${{ matrix.artifact_arch }}.tar.gz"
+          if [[ ! -f "$TARBALL" ]]; then
+            echo "Missing tarball: $TARBALL" >&2
+            exit 1
+          fi
+
+          DEB_FILE=$(find deploy -maxdepth 1 -type f -name "fips_*_${{ matrix.deb_arch }}.deb" | sort | head -n 1)
+          if [[ -z "$DEB_FILE" ]]; then
+            echo "Missing Debian package for ${{ matrix.deb_arch }}" >&2
+            exit 1
+          fi
+
+          echo "tarball=$TARBALL" >> "$GITHUB_OUTPUT"
+          echo "deb=$DEB_FILE" >> "$GITHUB_OUTPUT"
+
+      - name: SHA-256 hashes
+        run: |
+          echo "==> Linux release assets:"
+          sha256sum \
+            "${{ steps.linux-assets.outputs.tarball }}" \
+            "${{ steps.linux-assets.outputs.deb }}"
+
+      - name: Upload artifact (GitHub only)
+        if: ${{ env.ACT != 'true' }}
+        uses: actions/upload-artifact@v4
+        with:
+          name: fips_${{ needs.determine-versioning.outputs.linux_package_version }}_${{ matrix.artifact_arch }}_linux
+          path: |
+            ${{ steps.linux-assets.outputs.tarball }}
+            ${{ steps.linux-assets.outputs.deb }}
+          retention-days: 30
+
+      - name: Build Summary
+        run: |
+          echo "Build Summary for linux/${{ matrix.artifact_arch }}:"
+          echo "  Tarball: ${{ steps.linux-assets.outputs.tarball }}"
+          echo "  Debian:  ${{ steps.linux-assets.outputs.deb }}"
+
+  release:
+    name: Publish Linux assets to GitHub Release
+    runs-on: ubuntu-latest
+    needs: build
+    if: startsWith(github.ref, 'refs/tags/')
+    permissions:
+      contents: write
+
+    steps:
+      - name: Download Linux artifacts
+        uses: actions/download-artifact@v4
+        with:
+          path: dist
+          merge-multiple: true
+
+      - name: Generate Linux release checksums
+        run: |
+          cd dist
+          find . -maxdepth 1 -type f \( -name '*.deb' -o -name '*.tar.gz' \) -printf '%P\n' \
+            | LC_ALL=C sort \
+            | xargs sha256sum \
+            > checksums-linux.txt
+
+      - name: Wait for tag release
+        env:
+          GH_TOKEN: ${{ github.token }}
+        run: |
+          for attempt in $(seq 1 20); do
+            if gh release view "${GITHUB_REF_NAME}" --repo "${GITHUB_REPOSITORY}" >/dev/null 2>&1; then
+              exit 0
+            fi
+            echo "Release ${GITHUB_REF_NAME} not available yet; waiting..."
+            sleep 15
+          done
+
+          echo "Timed out waiting for release ${GITHUB_REF_NAME}" >&2
+          exit 1
+
+      - name: Upload Linux assets
+        env:
+          GH_TOKEN: ${{ github.token }}
+        run: |
+          gh release upload "${GITHUB_REF_NAME}" \
+            dist/*.deb \
+            dist/*.tar.gz \
+            dist/checksums-linux.txt \
+            --clobber \
+            --repo "${GITHUB_REPOSITORY}"

packaging/debian/build-deb.sh

@@ -1,7 +1,7 @@
 #!/usr/bin/env bash
 # Build a .deb package for FIPS using cargo-deb.
 #
-# Usage: ./build-deb.sh
+# Usage: ./build-deb.sh [--target <triple>] [--version <version>] [--no-build]
 #
 # Prerequisites: cargo-deb (install with: cargo install cargo-deb)
 # Output: deploy/fips_<version>_<arch>.deb
@@ -11,6 +11,48 @@ set -euo pipefail
 SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
 PROJECT_ROOT="${SCRIPT_DIR}/../.."
 
+usage() {
+    cat <<'EOF'
+Usage: packaging/debian/build-deb.sh [options]
+
+Options:
+  --target <triple>   Rust target triple to build/package
+  --version <version> Override Debian package version
+  --no-build          Package existing binaries without running cargo build
+  -h, --help          Show this help
+EOF
+}
+
+TARGET_TRIPLE=""
+VERSION_OVERRIDE=""
+NO_BUILD=0
+
+while [[ $# -gt 0 ]]; do
+    case "$1" in
+        --target)
+            TARGET_TRIPLE="${2:?missing value for --target}"
+            shift 2
+            ;;
+        --version)
+            VERSION_OVERRIDE="${2:?missing value for --version}"
+            shift 2
+            ;;
+        --no-build)
+            NO_BUILD=1
+            shift
+            ;;
+        -h|--help)
+            usage
+            exit 0
+            ;;
+        *)
+            echo "Unknown option: $1" >&2
+            usage >&2
+            exit 1
+            ;;
+    esac
+done
+
 cd "${PROJECT_ROOT}"
 
 # Ensure cargo-deb is available
@@ -26,14 +68,27 @@ fi
 
 # Build the .deb package
 echo "Building .deb package..."
-cargo deb
+OUTPUT_DIR="$(mktemp -d)"
+trap 'rm -rf "${OUTPUT_DIR}"' EXIT
+
+cargo_args=(deb --output "${OUTPUT_DIR}")
+if [[ -n "${TARGET_TRIPLE}" ]]; then
+    cargo_args+=(--target "${TARGET_TRIPLE}")
+fi
+if [[ -n "${VERSION_OVERRIDE}" ]]; then
+    cargo_args+=(--deb-version "${VERSION_OVERRIDE}")
+fi
+if [[ "${NO_BUILD}" -eq 1 ]]; then
+    cargo_args+=(--no-build)
+fi
+cargo "${cargo_args[@]}"
 
 # Move output to deploy/
 mkdir -p deploy
-DEB_FILE=$(find target/debian -name '*.deb' -printf '%T@ %p\n' | sort -rn | head -1 | cut -d' ' -f2)
+DEB_FILE=$(find "${OUTPUT_DIR}" -maxdepth 1 -name '*.deb' -printf '%T@ %p\n' | sort -rn | head -1 | cut -d' ' -f2)
 
 if [ -z "${DEB_FILE}" ]; then
-    echo "Error: No .deb file found in target/debian/" >&2
+    echo "Error: No .deb file found in ${OUTPUT_DIR}" >&2
     exit 1
 fi
 

packaging/systemd/build-tarball.sh

@@ -1,7 +1,7 @@
 #!/usr/bin/env bash
 # Build FIPS release binaries and create an install tarball.
 #
-# Usage: ./packaging/build-tarball.sh
+# Usage: ./packaging/build-tarball.sh [--target <triple>] [--version <version>] [--arch <arch>] [--no-build]
 # Output: deploy/fips-<version>-linux-<arch>.tar.gz
 
 set -euo pipefail
@@ -10,29 +10,108 @@ SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
 PACKAGING_DIR="$(cd "${SCRIPT_DIR}/.." && pwd)"
 PROJECT_ROOT="$(cd "${PACKAGING_DIR}/.." && pwd)"
 
-# Extract version from Cargo.toml
-VERSION=$(grep '^version' "${PROJECT_ROOT}/Cargo.toml" | head -1 | sed 's/.*"\(.*\)"/\1/')
-ARCH=$(uname -m)
+usage() {
+    cat <<'EOF'
+Usage: packaging/systemd/build-tarball.sh [options]
+
+Options:
+  --target <triple>   Rust target triple to build/package
+  --version <version> Override artifact version
+  --arch <arch>       Override artifact architecture name
+  --no-build          Package existing binaries without running cargo build
+  -h, --help          Show this help
+EOF
+}
+
+target_to_arch() {
+    local target="$1"
+    printf '%s\n' "${target%%-*}"
+}
+
+VERSION_OVERRIDE=""
+TARGET_TRIPLE=""
+ARCH_OVERRIDE=""
+NO_BUILD=0
+
+while [[ $# -gt 0 ]]; do
+    case "$1" in
+        --target)
+            TARGET_TRIPLE="${2:?missing value for --target}"
+            shift 2
+            ;;
+        --version)
+            VERSION_OVERRIDE="${2:?missing value for --version}"
+            shift 2
+            ;;
+        --arch)
+            ARCH_OVERRIDE="${2:?missing value for --arch}"
+            shift 2
+            ;;
+        --no-build)
+            NO_BUILD=1
+            shift
+            ;;
+        -h|--help)
+            usage
+            exit 0
+            ;;
+        *)
+            echo "Unknown option: $1" >&2
+            usage >&2
+            exit 1
+            ;;
+    esac
+done
+
+VERSION="${VERSION_OVERRIDE:-$(grep '^version' "${PROJECT_ROOT}/Cargo.toml" | head -1 | sed 's/.*"\(.*\)"/\1/')}"
+if [[ -n "${ARCH_OVERRIDE}" ]]; then
+    ARCH="${ARCH_OVERRIDE}"
+elif [[ -n "${TARGET_TRIPLE}" ]]; then
+    ARCH="$(target_to_arch "${TARGET_TRIPLE}")"
+else
+    ARCH="$(uname -m)"
+fi
 TARBALL_NAME="fips-${VERSION}-linux-${ARCH}"
 DEPLOY_DIR="${PROJECT_ROOT}/deploy"
 STAGING_DIR="${DEPLOY_DIR}/${TARBALL_NAME}"
+STRIP_BIN="${STRIP:-strip}"
+
+if [[ -n "${TARGET_TRIPLE}" ]]; then
+    BINARY_DIR="${PROJECT_ROOT}/target/${TARGET_TRIPLE}/release"
+else
+    BINARY_DIR="${PROJECT_ROOT}/target/release"
+fi
 
 echo "Building FIPS v${VERSION} for ${ARCH}..."
 
 # Build release binaries (tui is a default feature, includes fipstop)
-cargo build --release --manifest-path="${PROJECT_ROOT}/Cargo.toml"
+if [[ "${NO_BUILD}" -eq 0 ]]; then
+    cargo_args=(build --release --manifest-path="${PROJECT_ROOT}/Cargo.toml")
+    if [[ -n "${TARGET_TRIPLE}" ]]; then
+        cargo_args+=(--target "${TARGET_TRIPLE}")
+    fi
+    cargo "${cargo_args[@]}"
+fi
 
 # Create staging directory
 rm -rf "${STAGING_DIR}"
 mkdir -p "${STAGING_DIR}"
 
 # Copy binaries
-cp "${PROJECT_ROOT}/target/release/fips" "${STAGING_DIR}/"
-cp "${PROJECT_ROOT}/target/release/fipsctl" "${STAGING_DIR}/"
-cp "${PROJECT_ROOT}/target/release/fipstop" "${STAGING_DIR}/"
+for bin in fips fipsctl fipstop; do
+    if [[ ! -f "${BINARY_DIR}/${bin}" ]]; then
+        echo "Missing binary: ${BINARY_DIR}/${bin}" >&2
+        exit 1
+    fi
+    cp "${BINARY_DIR}/${bin}" "${STAGING_DIR}/"
+done
 
 # Strip binaries to reduce size
-strip "${STAGING_DIR}/fips" "${STAGING_DIR}/fipsctl" "${STAGING_DIR}/fipstop"
+if ! command -v "${STRIP_BIN}" &>/dev/null; then
+    echo "Strip tool not found: ${STRIP_BIN}" >&2
+    exit 1
+fi
+"${STRIP_BIN}" "${STAGING_DIR}/fips" "${STAGING_DIR}/fipsctl" "${STAGING_DIR}/fipstop"
 
 # Copy packaging files
 cp "${SCRIPT_DIR}/install.sh" "${STAGING_DIR}/"