fix(bindings): Specify correct minimum versions

.github/workflows/ci_rust.yml

@@ -366,3 +366,45 @@ jobs:
       - name: Run tests
         working-directory: ${{env.PCAP_TEST_PATH}}
         run: cargo test --all-features
+
+  minimal-versions:
+    runs-on: ubuntu-24.04
+    strategy:
+      matrix:
+        workspace-path:
+          - bindings/rust/extended
+          - bindings/rust/standard
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Install Rust toolchain
+        id: toolchain
+        # minimal-versions is an unstable feature, and requires the nightly toolchain:
+        # https://doc.rust-lang.org/nightly/cargo/reference/unstable.html#minimal-versions
+        run: |
+          rustup toolchain install ${{env.RUST_NIGHTLY_TOOLCHAIN}}
+          rustup override set ${{env.RUST_NIGHTLY_TOOLCHAIN}}
+
+      - uses: camshaft/rust-cache@v1
+
+      # cargo-minimal-versions requires cargo-hack:
+      # https://crates.io/crates/cargo-minimal-versions#user-content-prerequisites
+      - name: Install cargo-hack
+        uses: baptiste0928/[email protected]
+        with:
+          crate: cargo-hack
+
+      - name: Install cargo-minimal-versions
+        uses: baptiste0928/[email protected]
+        with:
+          crate: cargo-minimal-versions
+
+      - name: Generate
+        run: ./${{env.ROOT_PATH}}/generate.sh --skip-tests
+
+      - name: Test minimal versions
+        id: test-minimal-versions
+        working-directory: ${{matrix.workspace-path}}
+        run: |
+          cargo +${{env.RUST_NIGHTLY_TOOLCHAIN}} minimal-versions check --direct --ignore-private
+          cargo +${{env.RUST_NIGHTLY_TOOLCHAIN}} minimal-versions check --direct --ignore-private --all-features

bindings/rust/extended/s2n-tls-sys/templates/Cargo.template

@@ -36,8 +36,10 @@ stacktrace = []
 # unstable-foo = []
 
 [dependencies]
-aws-lc-rs = { version = "1" }
-libc = "0.2"
+# aws-lc-rs 1.6.4 adds DEP_AWS_LC environment variables which are required to build s2n-tls-sys.
+aws-lc-rs = { version = "1.6.4" }
+# A minimum libc version of 0.2.121 is required by aws-lc-sys 0.24.0.
+libc = "0.2.121"
 
 [build-dependencies]
 cc = { version = "1.0.100", features = ["parallel"] }

bindings/rust/extended/s2n-tls-tokio/Cargo.toml

@@ -13,7 +13,8 @@ default = []
 
 [dependencies]
 errno = { version = "0.3" }
-libc = { version = "0.2" }
+# A minimum libc version of 0.2.121 is required by aws-lc-sys 0.24.0.
+libc = { version = "0.2.121" }
 pin-project-lite = { version = "0.2" }
 s2n-tls = { version = "=0.3.9", path = "../s2n-tls" }
 tokio = { version = "1", features = ["net", "time"] }

bindings/rust/extended/s2n-tls/Cargo.toml

@@ -20,7 +20,8 @@ unstable-testing = []
 
 [dependencies]
 errno = { version = "0.3" }
-libc = "0.2"
+# A minimum libc version of 0.2.121 is required by aws-lc-sys 0.24.0.
+libc = "0.2.121"
 s2n-tls-sys = { version = "=0.3.9", path = "../s2n-tls-sys", features = ["internal"] }
 pin-project-lite = "0.2"
 hex = "0.4"

bindings/rust/standard/bench/Cargo.toml

@@ -2,6 +2,7 @@
 name = "bench"
 version = "0.1.0"
 edition = "2021"
+publish = false
 
 [dependencies]
 s2n-tls = { path = "../../extended/s2n-tls" }

bindings/rust/standard/s2n-tls-hyper/Cargo.toml

@@ -14,8 +14,10 @@ default = []
 [dependencies]
 s2n-tls = { version = "=0.3.9", path = "../../extended/s2n-tls" }
 s2n-tls-tokio = { version = "=0.3.9", path = "../../extended/s2n-tls-tokio" }
-hyper = { version = "1" }
-hyper-util = { version = "0.1", features = ["client-legacy", "tokio", "http1", "http2"] }
+# A minimum hyper version of 1.3 is required by hyper-util 0.1.4.
+hyper = { version = "1.3" }
+# s2n-tls-hyper depends on hyper-util functionality added in 0.1.4.
+hyper-util = { version = "0.1.4", features = ["client-legacy", "tokio", "http1", "http2"] }
 tower-service = { version = "0.3" }
 http = { version = "1" }