Fixed build for tls v1.3 on openssl v1.0.2. Added CI check (#253)

* fixed build for tls v1.3 on openssl v1.0.2. Added CI check

* fixed ci step name

* Include test for openssl v3.0

* Make reference to openssl@3.0 on the Readme given its the LTS version

Author: filipecosta90

.github/workflows/ci.yml

@@ -101,13 +101,27 @@ jobs:
         bash <(curl -s https://codecov.io/bash) -f memtier_benchmark-*-coverage.info || echo "Codecov did not collect coverage reports"
 
   build-macos:
+    strategy:
+      matrix:
+        openssl: ["1.1", "3.0"]
+    runs-on: macos-latest
+    steps:
+    - uses: actions/checkout@v1
+    - name: Install dependencies
+      run: brew install autoconf automake libtool libevent pkg-config openssl@${{ matrix.openssl }}
+    - name: Build
+      run: autoreconf -ivf && PKG_CONFIG_PATH=/usr/local/opt/openssl@${{ matrix.openssl }}/lib/pkgconfig ./configure && make
+
+  build-macos-openssl-1-0-2:
     strategy:
       matrix:
         platform: [macos-latest]
     runs-on: ${{ matrix.platform }}
     steps:
     - uses: actions/checkout@v1
     - name: Install dependencies
-      run: brew install autoconf automake libtool libevent pkg-config openssl@1.1
+      run: brew install autoconf automake libtool libevent pkg-config
+    - name: Install openssl v1.0.2
+      run: brew install rbenv/tap/openssl@1.0
     - name: Build
-      run: autoreconf -ivf && PKG_CONFIG_PATH=/usr/local/opt/openssl@1.1/lib/pkgconfig ./configure && make
+      run: autoreconf -ivf && PKG_CONFIG_PATH=/usr/local/opt/openssl@1.0/lib/pkgconfig ./configure && make

README.md

@@ -84,14 +84,14 @@ On Ubuntu/Debian distributions, simply install all prerequisites as follows:
 To build natively on macOS, use Homebrew to install the required dependencies:
 
 ```
-$ brew install autoconf automake libtool libevent pkg-config openssl@1.1
+$ brew install autoconf automake libtool libevent pkg-config openssl@3.0
 ```
 
 When running `./configure`, if it fails to find libssl it may be necessary to
 tweak the `PKG_CONFIG_PATH` environment variable:
 
 ```
-PKG_CONFIG_PATH=/usr/local/opt/openssl@1.1/lib/pkgconfig ./configure
+PKG_CONFIG_PATH=/usr/local/opt/openssl@3.0/lib/pkgconfig ./configure
 ```
 
 ### Building and installing

memtier_benchmark.cpp

@@ -1392,8 +1392,11 @@ int main(int argc, char *argv[])
             SSL_CTX_set_options(cfg.openssl_ctx, SSL_OP_NO_TLSv1_1);
         if (!(cfg.tls_protocols & REDIS_TLS_PROTO_TLSv1_2))
             SSL_CTX_set_options(cfg.openssl_ctx, SSL_OP_NO_TLSv1_2);
+// TLS 1.3 is only available as from version 1.1.1.
+#if OPENSSL_VERSION_NUMBER >= 0x10101000L
         if (!(cfg.tls_protocols & REDIS_TLS_PROTO_TLSv1_3))
             SSL_CTX_set_options(cfg.openssl_ctx, SSL_OP_NO_TLSv1_3);
+#endif
 
         if (cfg.tls_cert) {
             if (!SSL_CTX_use_certificate_chain_file(cfg.openssl_ctx, cfg.tls_cert)) {