updated documentation

README.md

@@ -82,6 +82,10 @@ It behaves the same as the jar file but it doesn't require a JVM and it has fast
 because of GraalVM's [closed-world assumption](https://www.graalvm.org/latest/reference-manual/native-image/basics/#static-analysis),
 the native executable does not supports plugins, so it comes with all plugins embedded into it.
 
+> [!WARNING]
+> The native executable is built with `-march=skylake`, so it may fail with SIGILL on x86 CPUs that do not support
+> the full skylake instruction set (as a rule of thumb, older than 2015)
+
 ## Integration with build tools
 
 ### Use RBCS with Gradle

rbcs-server/src/test/kotlin/net/woggioni/rbcs/server/test/TlsServerTest.kt

@@ -166,4 +166,17 @@ class TlsServerTest : AbstractTlsServerTest() {
         Assertions.assertEquals(HttpResponseStatus.OK.code(), response.statusCode())
         println(String(response.body()))
     }
+
+    @Test
+    @Order(10)
+    fun putAsUnknownUserUser() {
+        val (key, value) = keyValuePair
+        val client: HttpClient = getHttpClient(getClientKeyStore(ca, X500Name("CN=Unknown user")))
+        val requestBuilder = newRequestBuilder(key)
+            .header("Content-Type", "application/octet-stream")
+            .PUT(HttpRequest.BodyPublishers.ofByteArray(value))
+
+        val response: HttpResponse<String> = client.send(requestBuilder.build(), HttpResponse.BodyHandlers.ofString())
+        Assertions.assertEquals(HttpResponseStatus.INTERNAL_SERVER_ERROR.code(), response.statusCode())
+    }
 }