test: expand cross-adapter interop tests for signing and TLS (#63)

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: EffortlessSteven

Cargo.lock

@@ -6,6 +6,16 @@ edition.workspace = true
 license.workspace = true
 rust-version.workspace = true
 
+[dependencies]
+# Adapter crates — optional, gated behind features
+uselesskey-ring = { path = "../uselesskey-ring", features = ["all"], optional = true }
+uselesskey-rustcrypto = { path = "../uselesskey-rustcrypto", features = ["all"], optional = true }
+uselesskey-aws-lc-rs = { path = "../uselesskey-aws-lc-rs", features = ["all"], optional = true }
+uselesskey-rustls = { path = "../uselesskey-rustls", features = ["tls-config", "all", "rustls-ring"], optional = true }
+uselesskey-x509 = { path = "../uselesskey-x509", optional = true }
+uselesskey-hmac = { path = "../uselesskey-hmac", optional = true }
+aws-lc-rs = { workspace = true, optional = true }
+
 [dev-dependencies]
 uselesskey-core = { path = "../uselesskey-core" }
 uselesskey-rsa = { path = "../uselesskey-rsa" }
@@ -19,3 +29,12 @@ ed25519-dalek = { workspace = true }
 rsa = { workspace = true }
 sha2 = { version = "0.10", features = ["oid"] }
 signature = "2"
+hmac = "0.12"
+rustls = { workspace = true }
+
+[features]
+default = []
+cross-signing = ["dep:uselesskey-ring", "dep:uselesskey-rustcrypto", "dep:uselesskey-hmac"]
+cross-tls = ["dep:uselesskey-x509", "dep:uselesskey-rustls"]
+aws-lc-rs-interop = ["dep:uselesskey-aws-lc-rs", "dep:aws-lc-rs", "uselesskey-rustls?/rustls-aws-lc-rs"]
+all = ["cross-signing", "cross-tls", "aws-lc-rs-interop"]

crates/uselesskey-interop-tests/Cargo.toml

@@ -0,0 +1,22 @@
+//! Build script for uselesskey-interop-tests.
+//!
+//! Checks for NASM availability so aws-lc-rs interop tests can be gated
+//! gracefully on Windows.
+
+use std::process::Command;
+
+fn main() {
+    println!("cargo::rustc-check-cfg=cfg(has_nasm)");
+    println!("cargo::rerun-if-changed=build.rs");
+    println!("cargo::rerun-if-env-changed=PATH");
+
+    let nasm_available = Command::new("nasm")
+        .arg("-v")
+        .output()
+        .map(|output| output.status.success())
+        .unwrap_or(false);
+
+    if nasm_available {
+        println!("cargo::rustc-cfg=has_nasm");
+    }
+}