Add GitHub Actions workflow (#7)

Travis CI does not run anymore.

The GitHub Actions workflow builds and runs, but the nss encrypt fails
at runtime with error code `-8190` - and `PR_GetErrorText` does not
return text for it.

I don't see how to fix it so suggest we merge as-is (the other tests are
run and results are output for them), or to drop nss.
=> PR discussion concluded to merge and davide planning to investigate.

.github/workflows/build.yml

@@ -0,0 +1,38 @@
+name: Build
+on: [push, pull_request]
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          submodules: 'recursive'
+      - name: Install dependencies
+        run: sudo apt-get install libtool libnss3-dev libssl-dev libwolfssl-dev
+      - name: Checkout libsodium
+        run: |
+          mkdir libsodium
+          cd libsodium
+          git init
+          git fetch https://github.com/jedisct1/libsodium.git 3c49e89c19d06d9967180dda887fb15ae2e0fa40
+          git checkout FETCH_HEAD
+          git clone -n https://github.com/jedisct1/libsodium.git
+      - name: Build libsodium
+        run: |
+          cd libsodium
+          ./autogen.sh -s
+          ./configure --enable-opt
+          make -j $(nproc)
+          make check
+          sudo make install
+          sudo ldconfig
+      - name: Build
+        run: |
+          mkdir build
+          cd build
+          cmake ..
+          make -j $(nproc)
+      - name: CPUInfo
+        run: cat /proc/cpuinfo
+      - name: Run
+        run: ./build/crypto_benchmark

README.md

@@ -5,10 +5,48 @@ Crypto benchmark is a tool for benchmarking modern [AEAD](https://en.wikipedia.o
 Due to the use of the old AES-128-OCB algorithm and its slow implementation in [Mumble](https://github.com/mumble-voip/mumble), we decided to determine the best cipher and library for the VoIP communicator.
 
 
-## Build status
+## Result Snapshot (2024, GitHub Actions)
+
+```
+$ ./build/crypto_benchmark
+[NSS] running AES-256-GCM benchmark...
+nss_encrypt(): PK11_Encrypt() failed with error -8190
+[NSS] encryption failed!
+[NSS] decrypted message doesn't match original, encryption/decryption failure!
+[NSS] running ChaCha20-Poly1305 benchmark...
+[NSS] 7.172393 seconds for 1000000 iterations, 4096 bytes message
+[OpenSSL] running AES-256-GCM benchmark...
+[OpenSSL] 2.525026 seconds for 1000000 iterations, 4096 bytes message
+[OpenSSL] running AES-256-OCB benchmark...
+[OpenSSL] 1.819613 seconds for 1000000 iterations, 4096 bytes message
+[OpenSSL] running ChaCha20-Poly1305 benchmark...
+[OpenSSL] 4.273006 seconds for 1000000 iterations, 4096 bytes message
+[libsodium] running AEGIS-128L benchmark...
+[libsodium] 0.647157 seconds for 1000000 iterations, 4096 bytes message
+[libsodium] running AEGIS-256 benchmark...
+[libsodium] 1.020494 seconds for 1000000 iterations, 4096 bytes message
+[libsodium] running AES-256-GCM benchmark...
+[libsodium] 4.991140 seconds for 1000000 iterations, 4096 bytes message
+[libsodium] running ChaCha20-Poly1305 benchmark...
+[libsodium] 6.304524 seconds for 1000000 iterations, 4096 bytes message
+[wolfCrypt] running AES-256-GCM benchmark...
+[wolfCrypt] Iteration 154518/1000000 (15%), elapsed time: 10.001149
+[wolfCrypt] Iteration 309435/1000000 (30%), elapsed time: 20.002294
+[wolfCrypt] Iteration 463682/1000000 (46%), elapsed time: 30.003333
+[wolfCrypt] Iteration 617833/1000000 (61%), elapsed time: 40.004157
+[wolfCrypt] Iteration 772525/1000000 (77%), elapsed time: 50.005194
+[wolfCrypt] Iteration 926175/1000000 (92%), elapsed time: 60.006379
+[wolfCrypt] 64.802514 seconds for 1000000 iterations, 4096 bytes message
+[wolfCrypt] running ChaCha20-Poly1305 benchmark...
+[wolfCrypt] Iteration 369566/1000000 (36%), elapsed time: 10.001228
+[wolfCrypt] Iteration 739908/1000000 (73%), elapsed time: 20.002314
+[wolfCrypt] 27.040796 seconds for 1000000 iterations, 4096 bytes message
+Error: Process completed with exit code 1.
+```
+
+## Result Snapshot (2022, Travis CI)
 We build the project using [Travis CI](https://travis-ci.com), on Ubuntu 18.04, using GCC and Clang compilers, on AMD64 and ARM64 platforms. Current status: [![Build Status](https://travis-ci.com/mumble-voip/crypto-benchmark.svg?branch=master)](https://travis-ci.com/mumble-voip/crypto-benchmark)
 
-## Screenshot / demo
 ```
 $ ./crypto_benchmark
 [NSS] running AES-256-GCM benchmark...