fix: skip TLS hostname verification when rejectUnauthorized=false

src/main/java/io/github/mapepire_ibmi/SqlJob.java

@@ -21,6 +21,7 @@
 import java.util.stream.Collectors;
 
 import javax.net.ssl.SSLContext;
+import javax.net.ssl.SSLParameters;
 import javax.net.ssl.SSLSocketFactory;
 import javax.net.ssl.TrustManager;
 import javax.net.ssl.TrustManagerFactory;
@@ -283,6 +284,15 @@ public void onMessage(String message) {
                 }
             }
 
+            @Override
+            protected void onSetSSLParameters(SSLParameters sslParameters) {
+                if (db2Server.getRejectUnauthorized()) {
+                    super.onSetSSLParameters(sslParameters);
+                } else {
+                    sslParameters.setEndpointIdentificationAlgorithm(null);
+                }
+            }
+
             @Override
             public void onClose(int code, String reason, boolean remote) {
                 if (isTracingChannelData) {

src/test/java/io/github/mapepire_ibmi/ConnectTest.java

@@ -4,11 +4,15 @@
 import static org.junit.jupiter.api.Assertions.assertThrowsExactly;
 import static org.junit.jupiter.api.Assertions.assertTrue;
 
+import java.net.InetAddress;
 import java.sql.SQLException;
+import java.util.concurrent.ExecutionException;
 
+import org.junit.jupiter.api.Assumptions;
 import org.junit.jupiter.api.Test;
 
 import io.github.mapepire_ibmi.types.ConnectionResult;
+import io.github.mapepire_ibmi.types.DaemonServer;
 
 class ConnectTest extends MapepireTest {
     @Test
@@ -38,6 +42,44 @@ void invalidConnection() throws Exception {
                 .contains("The application server rejected the connection."));
     }
 
+    @Test
+    void rejectUnauthorizedFalseConnectsWhenCertificateDoesNotMatchHost() throws Exception {
+        DaemonServer creds = MapepireTest.getCreds();
+        String host = creds.getHost();
+        String mismatchedHost = InetAddress.getByName(host).getHostAddress();
+        Assumptions.assumeTrue(!mismatchedHost.equals(host));
+
+        DaemonServer relaxedCreds = new DaemonServer(
+                mismatchedHost, creds.getPort(), creds.getUser(), creds.getPassword(), false);
+        SqlJob job = new SqlJob();
+        ConnectionResult result = job.connect(relaxedCreds).get();
+        job.close();
+
+        assertTrue(result.getSuccess());
+        assertTrue(result.getJob().contains("QZDASOINIT"));
+    }
+
+    @Test
+    void rejectUnauthorizedTrueFailsWhenCertificateDoesNotMatchHost() throws Exception {
+        DaemonServer creds = MapepireTest.getCreds();
+        String host = creds.getHost();
+        String mismatchedHost = InetAddress.getByName(host).getHostAddress();
+        Assumptions.assumeTrue(!mismatchedHost.equals(host));
+
+        DaemonServer strictCreds = new DaemonServer(
+                mismatchedHost, creds.getPort(), creds.getUser(), creds.getPassword(), true, creds.getCa());
+
+        ExecutionException e = assertThrowsExactly(ExecutionException.class, () -> {
+            SqlJob job = new SqlJob();
+            try {
+                job.connect(strictCreds).get();
+            } finally {
+                job.close();
+            }
+        });
+        assertTrue(e.getCause().getMessage().contains("No subject alternative"));
+    }
+
     @Test
     void newJobOnSubsequentConnects() throws Exception {
         SqlJob job = new SqlJob();