Update Kerberos tests to work on JDK11+. This closes #3579

pom.xml

@@ -82,7 +82,7 @@
       <karaf.version>4.3.0</karaf.version>
       <pax.exam.version>4.9.1</pax.exam.version>
       <commons.config.version>2.7</commons.config.version>
-      <commons.lang.version>3.0</commons.lang.version>
+      <commons.lang.version>3.12.0</commons.lang.version>
       <activemq5-version>5.16.0</activemq5-version>
       <apache.derby.version>10.11.1.1</apache.derby.version>
       <commons.beanutils.version>1.9.4</commons.beanutils.version>
@@ -199,7 +199,7 @@
       <skipStyleCheck>true</skipStyleCheck>
       <skipOWASP>true</skipOWASP>
 
-      <directory-version>2.0.0-M15</directory-version>
+      <directory-version>2.0.0.AM26</directory-version>
       <directory-jdbm2-version>2.0.0-M1</directory-jdbm2-version>
 
       <netty-transport-native-epoll-classifier>linux-x86_64</netty-transport-native-epoll-classifier>
@@ -280,7 +280,7 @@
          </dependency>
 
          <!-- ### For MQTT Tests && Examples -->
-	 <dependency>
+    <dependency>
            <groupId>org.eclipse.paho</groupId>
            <artifactId>org.eclipse.paho.client.mqttv3</artifactId>
            <version>${paho.client.mqttv3.version}</version>

tests/integration-tests/pom.xml

@@ -335,6 +335,11 @@
             </exclusion>
          </exclusions>
       </dependency>
+      <dependency>
+          <groupId>org.apache.commons</groupId>
+          <artifactId>commons-lang3</artifactId>
+          <scope>test</scope>
+      </dependency>
 
       <!-- karaf test -->
 
@@ -390,7 +395,13 @@
       <dependency>
          <groupId>org.apache.hadoop</groupId>
          <artifactId>hadoop-minikdc</artifactId>
-         <version>2.8.1</version>
+         <version>3.3.0</version>
+         <scope>test</scope>
+      </dependency>
+      <dependency>
+         <groupId>org.apache.directory.server</groupId>
+         <artifactId>apacheds-interceptor-kerberos</artifactId>
+         <version>${directory-version}</version>
          <scope>test</scope>
       </dependency>
       <dependency>
@@ -554,10 +565,6 @@
                      <artifactId>maven-surefire-plugin</artifactId>
                      <configuration>
                         <excludes combine.children="append">
-                           <!-- These fail, likely due to due to isues with the old Kerberos test harness bits -->
-                           <exclude>**/JMSSaslGssapiTest.java</exclude>
-                           <exclude>**/SaslKrb5LDAPSecurityTest.java</exclude>
-
                            <!-- This is no longer possible on JDK11 because the old KRB5 cipher suites it requires were
                                 removed from JDK11 while adding TLS 1.3 support http://openjdk.java.net/jeps/332 -->
                            <exclude>**/CoreClientOverOneWaySSLKerb5Test.java</exclude>

tests/integration-tests/src/test/java/org/apache/activemq/artemis/tests/integration/amqp/JMSSaslGssapiTest.java

@@ -16,24 +16,37 @@
  */
 package org.apache.activemq.artemis.tests.integration.amqp;
 
-import javax.jms.Connection;
+import java.io.BufferedReader;
-import javax.jms.JMSSecurityException;
-import javax.jms.MessageConsumer;
-import javax.jms.MessageProducer;
-import javax.jms.Session;
-import javax.jms.TextMessage;
 import java.io.File;
+import java.io.FileReader;
+import java.io.OutputStream;
 import java.net.URI;
 import java.net.URL;
+import java.nio.ByteBuffer;
+import java.nio.channels.Channels;
+import java.nio.channels.WritableByteChannel;
+import java.nio.charset.StandardCharsets;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
 import java.util.Collections;
 import java.util.HashSet;
 import java.util.LinkedHashMap;
 import java.util.Map;
 import java.util.Optional;
+import java.util.Properties;
 import java.util.Set;
 import java.util.concurrent.TimeUnit;
 import java.util.concurrent.atomic.AtomicBoolean;
 
+import javax.jms.Connection;
+import javax.jms.JMSSecurityException;
+import javax.jms.MessageConsumer;
+import javax.jms.MessageProducer;
+import javax.jms.Queue;
+import javax.jms.Session;
+import javax.jms.TextMessage;
+
 import org.apache.activemq.artemis.core.remoting.impl.netty.NettyConnector;
 import org.apache.activemq.artemis.core.remoting.impl.netty.TransportConstants;
 import org.apache.activemq.artemis.core.security.Role;
@@ -47,21 +60,25 @@ import org.apache.activemq.artemis.protocol.amqp.proton.handler.ProtonHandler;
 import org.apache.activemq.artemis.protocol.amqp.sasl.ClientSASL;
 import org.apache.activemq.artemis.protocol.amqp.sasl.ClientSASLFactory;
 import org.apache.activemq.artemis.spi.core.security.ActiveMQJAASSecurityManager;
-import org.apache.activemq.artemis.tests.util.JavaVersionUtil;
 import org.apache.activemq.artemis.tests.util.Wait;
 import org.apache.activemq.artemis.utils.RandomUtil;
 import org.apache.hadoop.minikdc.MiniKdc;
+import org.apache.kerby.kerberos.kerb.keytab.Keytab;
+import org.apache.kerby.kerberos.kerb.keytab.KeytabEntry;
+import org.apache.kerby.kerberos.kerb.type.base.PrincipalName;
 import org.apache.qpid.jms.JmsConnectionFactory;
 import org.apache.qpid.jms.sasl.GssapiMechanism;
 import org.apache.qpid.proton.amqp.Symbol;
-import org.junit.After;
+import org.junit.AfterClass;
-import org.junit.Assume;
-import org.junit.Before;
 import org.junit.BeforeClass;
 import org.junit.Test;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
 public class JMSSaslGssapiTest extends JMSClientTestSupport {
 
+   private static final Logger LOG = LoggerFactory.getLogger(JMSSaslGssapiTest.class);
+
    static {
       String path = System.getProperty("java.security.auth.login.config");
       if (path == null) {
@@ -72,25 +89,48 @@ public class JMSSaslGssapiTest extends JMSClientTestSupport {
          }
       }
    }
-   MiniKdc kdc = null;
+
-   private final boolean debug = false;
+   private static final String KRB5_TCP_PORT_TEMPLATE = "MINI_KDC_PORT";
+   private static final String KRB5_CONFIG_TEMPLATE = "minikdc-krb5-template.conf";
+   private static final String KRB5_DEFAULT_KEYTAB = "target/test.krb5.keytab";
+
+   private static MiniKdc kdc;
+   private static final boolean debug = false;
 
    @BeforeClass
-   public static void checkAssumptions() throws Exception {
+   public static void setUpKerberos() throws Exception {
-      Assume.assumeTrue("Test only runs on JDK 8", JavaVersionUtil.isJava8());
+      Properties kdcConf = MiniKdc.createConf();
-   }
+      kdcConf.setProperty("debug", Boolean.toString(debug));
 
-   @Before
+      // Creates a single server for the tests as there were failures when spawning and killing one per unit test.
-   public void setUpKerberos() throws Exception {
+      kdc = new MiniKdc(kdcConf, new File("target/"));
-      kdc = new MiniKdc(MiniKdc.createConf(), temporaryFolder.newFolder("kdc"));
       kdc.start();
 
       // hard coded match, default_keytab_name in minikdc-krb5.conf template
-      File userKeyTab = new File("target/test.krb5.keytab");
+      File userKeyTab = new File(KRB5_DEFAULT_KEYTAB);
       kdc.createPrincipal(userKeyTab, "client", "amqp/localhost");
 
+      // We need to hard code the default keyTab into the Krb5 configuration file which is not possible
+      // with this version of MiniKDC so we use a template file and replace the port with the value from
+      // the MiniKDC instance we just started.
+      rewriteKrbConfFile(kdc);
+
       if (debug) {
-         for (java.util.logging.Logger logger : new java.util.logging.Logger[] {java.util.logging.Logger.getLogger("javax.security.sasl"), java.util.logging.Logger.getLogger("org.apache.qpid.proton")}) {
+         LOG.debug("java.security.krb5.conf='{}'", System.getProperty("java.security.krb5.conf"));
+         try (BufferedReader br = new BufferedReader(new FileReader(System.getProperty("java.security.krb5.conf")))) {
+            br.lines().forEach(line -> LOG.debug(line));
+         }
+
+         Keytab kt = Keytab.loadKeytab(userKeyTab);
+         for (PrincipalName name : kt.getPrincipals()) {
+            for (KeytabEntry entry : kt.getKeytabEntries(name)) {
+               LOG.info("KeyTab Entry: PrincipalName:" + entry.getPrincipal() + " ; KeyInfo:" + entry.getKey().getKeyType());
+            }
+         }
+
+         for (java.util.logging.Logger logger : new java.util.logging.Logger[] {java.util.logging.Logger.getLogger("logincontext"),
+                                                                                java.util.logging.Logger.getLogger("javax.security.sasl"),
+                                                                                java.util.logging.Logger.getLogger("org.apache.qpid.proton")}) {
             logger.setLevel(java.util.logging.Level.FINEST);
             logger.addHandler(new java.util.logging.ConsoleHandler());
             for (java.util.logging.Handler handler : logger.getHandlers()) {
@@ -100,8 +140,8 @@ public class JMSSaslGssapiTest extends JMSClientTestSupport {
       }
    }
 
-   @After
+   @AfterClass
-   public void stopKerberos() throws Exception {
+   public static void stopKerberos() throws Exception {
       if (kdc != null) {
          kdc.stop();
       }
@@ -125,6 +165,10 @@ public class JMSSaslGssapiTest extends JMSClientTestSupport {
       roles.add(role);
       server.getSecurityRepository().addMatch(getQueueName().toString(), roles);
 
+      if (debug) {
+         // The default produces so much log spam that debugging the exchanges becomes impossible.
+         server.getConfiguration().setMessageExpiryScanPeriod(30_000);
+      }
    }
 
    @Override
@@ -134,7 +178,6 @@ public class JMSSaslGssapiTest extends JMSClientTestSupport {
 
    @Override
    protected URI getBrokerQpidJMSConnectionURI() {
-
       try {
          int port = AMQP_PORT;
 
@@ -164,7 +207,7 @@ public class JMSSaslGssapiTest extends JMSClientTestSupport {
 
       try {
          Session session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
-         javax.jms.Queue queue = session.createQueue(getQueueName());
+         Queue queue = session.createQueue(getQueueName());
          MessageConsumer consumer = session.createConsumer(queue);
          MessageProducer producer = session.createProducer(queue);
 
@@ -174,7 +217,6 @@ public class JMSSaslGssapiTest extends JMSClientTestSupport {
          TextMessage m = (TextMessage) consumer.receive(1000);
          assertNotNull(m);
          assertEquals(text, m.getText());
-
       } finally {
          connection.close();
       }
@@ -182,7 +224,6 @@ public class JMSSaslGssapiTest extends JMSClientTestSupport {
 
    @Test(timeout = 600000)
    public void testSaslPlainConnectionDenied() throws Exception {
-
       JmsConnectionFactory factory = new JmsConnectionFactory(new URI("amqp://localhost:" + AMQP_PORT + "?amqp.saslMechanisms=PLAIN"));
       try {
          factory.createConnection("plain", "secret");
@@ -192,7 +233,7 @@ public class JMSSaslGssapiTest extends JMSClientTestSupport {
       }
    }
 
-   @Test
+   @Test(timeout = 900000)
    public void testOutboundWithSlowMech() throws Exception {
       final Map<String, Object> config = new LinkedHashMap<>(); config.put(TransportConstants.HOST_PROP_NAME, "localhost");
       config.put(TransportConstants.PORT_PROP_NAME, String.valueOf(AMQP_PORT));
@@ -270,4 +311,19 @@ public class JMSSaslGssapiTest extends JMSClientTestSupport {
          lifeCycleListener.stop();
       }
    }
+
+   private static void rewriteKrbConfFile(MiniKdc server) throws Exception {
+      final Path template = Paths.get(JMSSaslGssapiTest.class.getClassLoader().getResource(KRB5_CONFIG_TEMPLATE).toURI());
+      final String krb5confTemplate = new String(Files.readAllBytes(template), StandardCharsets.UTF_8);
+      final String replacementPort = Integer.toString(server.getPort());
+
+      // Replace the port template with the current actual port of the MiniKDC Server instance.
+      final String krb5confUpdated = krb5confTemplate.replaceAll(KRB5_TCP_PORT_TEMPLATE, replacementPort);
+
+      try (OutputStream outputStream = Files.newOutputStream(server.getKrb5conf().toPath());
+           WritableByteChannel channel = Channels.newChannel(outputStream)) {
+
+         channel.write(ByteBuffer.wrap(krb5confUpdated.getBytes(StandardCharsets.UTF_8)));
+      }
+   }
 }

tests/integration-tests/src/test/java/org/apache/activemq/artemis/tests/integration/amqp/SaslKrb5LDAPSecurityTest.java

@@ -30,6 +30,7 @@ import javax.security.auth.Subject;
 import javax.security.auth.login.LoginContext;
 import java.io.BufferedReader;
 import java.io.File;
+import java.io.FileReader;
 import java.io.InputStream;
 import java.io.InputStreamReader;
 import java.io.StringReader;
@@ -58,10 +59,8 @@ import org.apache.activemq.artemis.core.server.ActiveMQServer;
 import org.apache.activemq.artemis.core.server.ActiveMQServers;
 import org.apache.activemq.artemis.spi.core.security.ActiveMQJAASSecurityManager;
 import org.apache.activemq.artemis.tests.util.ActiveMQTestBase;
-import org.apache.activemq.artemis.tests.util.JavaVersionUtil;
 import org.apache.activemq.artemis.utils.RandomUtil;
 import org.apache.commons.io.FileUtils;
-import org.apache.commons.io.IOUtils;
 import org.apache.directory.api.ldap.model.constants.SupportedSaslMechanisms;
 import org.apache.directory.api.ldap.model.entry.DefaultEntry;
 import org.apache.directory.api.ldap.model.entry.Entry;
@@ -95,9 +94,7 @@ import org.apache.directory.shared.kerberos.components.EncryptionKey;
 import org.apache.qpid.jms.JmsConnectionFactory;
 import org.junit.After;
 import org.junit.Assert;
-import org.junit.Assume;
 import org.junit.Before;
-import org.junit.BeforeClass;
 import org.junit.Rule;
 import org.junit.Test;
 import org.junit.rules.TemporaryFolder;
@@ -122,9 +119,8 @@ import static org.apache.activemq.artemis.tests.util.ActiveMQTestBase.NETTY_ACCE
 @CreateKdcServer(transports = {@CreateTransport(protocol = "TCP", port = 0)})
 @ApplyLdifFiles("SaslKrb5LDAPSecurityTest.ldif")
 public class SaslKrb5LDAPSecurityTest extends AbstractLdapTestUnit {
-   private static final org.jboss.logging.Logger log = org.jboss.logging.Logger.getLogger(SaslKrb5LDAPSecurityTest.class);
-
    protected static final Logger LOG = LoggerFactory.getLogger(SaslKrb5LDAPSecurityTest.class);
+
    public static final String QUEUE_NAME = "some_queue";
 
    static {
@@ -155,14 +151,8 @@ public class SaslKrb5LDAPSecurityTest extends AbstractLdapTestUnit {
    public TemporaryFolder temporaryFolder;
    private String testDir;
 
-   @BeforeClass
-   public static void checkAssumptions() throws Exception {
-      Assume.assumeTrue("Test only runs on JDK 8", JavaVersionUtil.isJava8());
-   }
-
    @Before
    public void setUp() throws Exception {
-
       if (debug) {
          initLogging();
       }
@@ -196,27 +186,24 @@ public class SaslKrb5LDAPSecurityTest extends AbstractLdapTestUnit {
 
    private void rewriteKerb5Conf() throws Exception {
       StringBuilder sb = new StringBuilder();
-      InputStream is2 = this.getClass().getClassLoader().getResourceAsStream("minikdc-krb5.conf");
 
-      BufferedReader r = null;
+      try (InputStream inputStream = this.getClass().getClassLoader().getResourceAsStream("minikdc-krb5.conf");
-      try {
+           BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream, StandardCharsets.UTF_8))) {
-         r = new BufferedReader(new InputStreamReader(is2, StandardCharsets.UTF_8));
+
-         String line = r.readLine();
+         String line = reader.readLine();
 
          while (line != null) {
             sb.append(line).append("{3}");
-            line = r.readLine();
+            line = reader.readLine();
          }
-      } finally {
-         IOUtils.closeQuietly(r);
-         IOUtils.closeQuietly(is2);
       }
 
       InetSocketAddress addr =
          (InetSocketAddress)kdcServer.getTransports()[0].getAcceptor().getLocalAddress();
       int port = addr.getPort();
       File krb5conf = new File(testDir, "krb5.conf").getAbsoluteFile();
-      FileUtils.writeStringToFile(krb5conf, MessageFormat.format(sb.toString(), getRealm(), "localhost", Integer.toString(port), System.getProperty("line.separator")));
+      String krb5confBody = MessageFormat.format(sb.toString(), getRealm(), "localhost", Integer.toString(port), System.getProperty("line.separator"));
+      FileUtils.writeStringToFile(krb5conf, krb5confBody, StandardCharsets.UTF_8);
       System.setProperty("java.security.krb5.conf", krb5conf.getAbsolutePath());
 
       System.setProperty("sun.security.krb5.debug", "true");
@@ -232,10 +219,16 @@ public class SaslKrb5LDAPSecurityTest extends AbstractLdapTestUnit {
       refreshMethod.invoke(classRef, new Object[0]);
 
       LOG.debug("krb5.conf to: {}", krb5conf.getAbsolutePath());
+      if (debug) {
+         LOG.debug("java.security.krb5.conf='{}'", System.getProperty("java.security.krb5.conf"));
+         try (BufferedReader br = new BufferedReader(new FileReader(System.getProperty("java.security.krb5.conf")))) {
+            br.lines().forEach(line -> LOG.debug(line));
+         }
+      }
    }
 
    private void dumpLdapContents() throws Exception {
-      EntryFilteringCursor cursor = getService().getAdminSession().search(new Dn("ou=system"), SearchScope.SUBTREE, new PresenceNode("ObjectClass"), AliasDerefMode.DEREF_ALWAYS);
+      EntryFilteringCursor cursor = (EntryFilteringCursor) getService().getAdminSession().search(new Dn("ou=system"), SearchScope.SUBTREE, new PresenceNode("ObjectClass"), AliasDerefMode.DEREF_ALWAYS);
       String st = "";
 
       while (cursor.next()) {
@@ -243,9 +236,9 @@ public class SaslKrb5LDAPSecurityTest extends AbstractLdapTestUnit {
          String ss = LdifUtils.convertToLdif(entry);
          st += ss + "\n";
       }
-      log.debug(st);
+      LOG.debug(st);
 
-      cursor = getService().getAdminSession().search(new Dn("dc=example,dc=com"), SearchScope.SUBTREE, new PresenceNode("ObjectClass"), AliasDerefMode.DEREF_ALWAYS);
+      cursor = (EntryFilteringCursor) getService().getAdminSession().search(new Dn("dc=example,dc=com"), SearchScope.SUBTREE, new PresenceNode("ObjectClass"), AliasDerefMode.DEREF_ALWAYS);
       st = "";
 
       while (cursor.next()) {
@@ -253,15 +246,18 @@ public class SaslKrb5LDAPSecurityTest extends AbstractLdapTestUnit {
          String ss = LdifUtils.convertToLdif(entry);
          st += ss + "\n";
       }
-      log.debug(st);
+      LOG.debug(st);
    }
 
    private void initLogging() {
-      java.util.logging.Logger logger = java.util.logging.Logger.getLogger("javax.security.sasl");
+      for (java.util.logging.Logger logger : new java.util.logging.Logger[] {java.util.logging.Logger.getLogger("logincontext"),
-      logger.setLevel(java.util.logging.Level.FINEST);
+                                                                             java.util.logging.Logger.getLogger("javax.security.sasl"),
-      logger.addHandler(new java.util.logging.ConsoleHandler());
+                                                                             java.util.logging.Logger.getLogger("org.apache.qpid.proton")}) {
-      for (java.util.logging.Handler handler: logger.getHandlers()) {
+         logger.setLevel(java.util.logging.Level.FINEST);
-         handler.setLevel(java.util.logging.Level.FINEST);
+         logger.addHandler(new java.util.logging.ConsoleHandler());
+         for (java.util.logging.Handler handler : logger.getHandlers()) {
+            handler.setLevel(java.util.logging.Level.FINEST);
+         }
       }
    }
 
@@ -276,8 +272,10 @@ public class SaslKrb5LDAPSecurityTest extends AbstractLdapTestUnit {
          + "krb5PrincipalName: " + principal + "@" + getRealm() + "\n"
          + "krb5KeyVersionNumber: 0";
 
-      for (LdifEntry ldifEntry : new LdifReader(new StringReader(content))) {
+      try (LdifReader ldifReader = new LdifReader(new StringReader(content))) {
-         service.getAdminSession().add(new DefaultEntry(service.getSchemaManager(), ldifEntry.getEntry()));
+         for (LdifEntry ldifEntry : ldifReader) {
+            service.getAdminSession().add(new DefaultEntry(service.getSchemaManager(), ldifEntry.getEntry()));
+         }
       }
    }
 
@@ -292,7 +290,7 @@ public class SaslKrb5LDAPSecurityTest extends AbstractLdapTestUnit {
          for (Map.Entry<EncryptionType, EncryptionKey> entry : KerberosKeyFactory.getKerberosKeys(principal, generatedPassword).entrySet()) {
             EncryptionKey ekey = entry.getValue();
             byte keyVersion = (byte) ekey.getKeyVersion();
-            entries.add(new KeytabEntry(principal, 1L, timestamp, keyVersion, ekey));
+            entries.add(new KeytabEntry(principal, 1, timestamp, keyVersion, ekey));
          }
       }
       keytab.setEntries(entries);

tests/integration-tests/src/test/java/org/apache/activemq/artemis/tests/integration/persistence/metrics/JournalPendingMessageTest.java

@@ -42,7 +42,7 @@ import org.apache.activemq.artemis.jms.client.ActiveMQConnectionFactory;
 import org.apache.activemq.artemis.jms.client.ActiveMQTextMessage;
 import org.apache.activemq.artemis.utils.Wait;
 import org.apache.activemq.artemis.utils.Wait.Condition;
-import org.apache.commons.lang.StringUtils;
+import org.apache.commons.lang3.StringUtils;
 import org.junit.Before;
 import org.junit.Test;
 import org.slf4j.Logger;

tests/integration-tests/src/test/java/org/apache/activemq/artemis/tests/integration/stomp/StompWebSocketMaxFrameTest.java

@@ -24,7 +24,7 @@ import org.apache.activemq.artemis.tests.util.Wait;
 import org.apache.activemq.artemis.tests.integration.stomp.util.ClientStompFrame;
 import org.apache.activemq.artemis.tests.integration.stomp.util.StompClientConnection;
 import org.apache.activemq.artemis.tests.integration.stomp.util.StompClientConnectionFactory;
-import org.apache.commons.lang.RandomStringUtils;
+import org.apache.commons.lang3.RandomStringUtils;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.junit.runners.Parameterized;

tests/integration-tests/src/test/resources/minikdc-krb5-template.conf

@@ -0,0 +1,30 @@
+#
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+[libdefaults]
+    kdc_realm = EXAMPLE.COM
+    default_realm = EXAMPLE.COM
+    udp_preference_limit = 1
+    kdc_tcp_port = MINI_KDC_PORT
+    default_keytab_name = FILE:target/test.krb5.keytab
+
+[realms]
+    EXAMPLE.COM = {
+        kdc = localhost:MINI_KDC_PORT
+    }
+