Regenerate example identity.pfx without RC2 for OpenSSL 3

tests/identity_pfx.rs

@@ -0,0 +1,50 @@
+//! The TLS examples load `examples/identity.pfx` through `native_tls`.
+//! OpenSSL 3 rejects the historical RC2-40-CBC PKCS#12 protection by default,
+//! which made `cargo run --example hyper-server` (and the other TLS examples)
+//! fail on modern Linux. Keep the bundled identity on modern algorithms.
+
+use std::process::Command;
+
+#[test]
+fn example_identity_pfx_loads_with_native_tls() {
+    native_tls::Identity::from_pkcs12(include_bytes!("../examples/identity.pfx"), "password")
+        .expect(
+            "examples/identity.pfx must load with native-tls without enabling the \
+             OpenSSL legacy provider",
+        );
+}
+
+#[test]
+fn example_identity_pfx_opens_with_openssl3_without_legacy() {
+    let version = Command::new("openssl")
+        .arg("version")
+        .output()
+        .expect("openssl must be available to check the bundled PKCS#12");
+    let version = String::from_utf8_lossy(&version.stdout);
+    if !version.contains("OpenSSL 3") {
+        eprintln!("skipping OpenSSL 3 PKCS#12 check; got {version}");
+        return;
+    }
+
+    let out = tempfile::NamedTempFile::new().expect("temp file");
+    let output = Command::new("openssl")
+        .args([
+            "pkcs12",
+            "-in",
+            "examples/identity.pfx",
+            "-passin",
+            "pass:password",
+            "-nodes",
+            "-out",
+        ])
+        .arg(out.path())
+        .output()
+        .expect("failed to run openssl pkcs12");
+
+    assert!(
+        output.status.success(),
+        "examples/identity.pfx must open under OpenSSL 3 without `-legacy`\nstdout:\n{}\nstderr:\n{}",
+        String::from_utf8_lossy(&output.stdout),
+        String::from_utf8_lossy(&output.stderr),
+    );
+}