Merge branch 'cifuzz'

Add CIFuzz on GitHub.

Closes strongswan/strongswan#2993

.github/workflows/cifuzz.yml

@@ -0,0 +1,54 @@
+name: CIFuzz
+on: [push, pull_request]
+permissions: {}
+jobs:
+  pre-check:
+    runs-on: ubuntu-latest
+    outputs:
+      should_skip: ${{ steps.skip-check.outputs.should_skip }}
+    steps:
+      - id: skip-check
+        uses: fkirc/skip-duplicate-actions@master
+        with:
+          concurrent_skipping: 'same_content_newer'
+
+  fuzzing:
+    needs: pre-check
+    if: ${{ needs.pre-check.outputs.should_skip != 'true' }}
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        sanitizer: [address, undefined]
+    permissions:
+      security-events: write
+    steps:
+    - name: Build Fuzzers
+      id: build
+      uses: google/oss-fuzz/infra/cifuzz/actions/build_fuzzers@master
+      with:
+        oss-fuzz-project-name: 'strongswan'
+        language: c
+        sanitizer: ${{ matrix.sanitizer }}
+
+    - name: Run Fuzzers
+      uses: google/oss-fuzz/infra/cifuzz/actions/run_fuzzers@master
+      with:
+        oss-fuzz-project-name: 'strongswan'
+        output-sarif: true
+        language: c
+        sanitizer: ${{ matrix.sanitizer }}
+
+    - name: Upload Crash
+      uses: actions/upload-artifact@v4
+      if: failure() && steps.build.outcome == 'success'
+      with:
+        name: ${{ matrix.sanitizer }}-artifacts
+        path: ./out/artifacts
+
+    - name: Upload Sarif
+      if: always() && steps.build.outcome == 'success'
+      uses: github/codeql-action/upload-sarif@v4
+      with:
+        sarif_file: cifuzz-sarif/results.sarif
+        checkout_path: cifuzz-sarif