ci: expand the test framework to cover openssl

.github/workflows/unit_tests.sh

@@ -29,6 +29,8 @@ function info() {
 
 set -ex
 
+MESON_ARGS=(-Dcryptolib=${CRYPTOLIB:-auto})
+
 for phase in "${PHASES[@]}"; do
     case $phase in
         SETUP)

.github/workflows/unit_tests.yml

@@ -22,10 +22,18 @@ jobs:
       fail-fast: false
       matrix:
         run_phase: [GCC, GCC_ASAN_UBSAN, CLANG, CLANG_ASAN_UBSAN]
+        cryptolib: [auto]
+        include:
+          - run_phase: GCC
+            cryptolib: openssl
+          - run_phase: CLANG
+            cryptolib: gcrypt
     steps:
       - name: Repository checkout
         uses: actions/checkout@ec3a7ce113134d7a93b817d10a8272cb61118579
       - name: Install build dependencies
         run: sudo -E .github/workflows/unit_tests.sh SETUP
-      - name: Build & test (${{ matrix.run_phase }})
+      - name: Build & test (${{ matrix.run_phase }}-${{ matrix.cryptolib }})
         run: sudo -E .github/workflows/unit_tests.sh RUN_${{ matrix.run_phase }}
+        env:
+          CRYPTOLIB: ${{ matrix.cryptolib }}