Logic to add config for loginContext

src/main/java/com/microsoft/sqlserver/jdbc/KerbAuthentication.java

@@ -42,12 +42,6 @@
     private boolean useDefaultNativeGSSCredential = false;
     private GSSContext peerContext = null;
 
-    static {
-        // Overrides the default JAAS configuration loader.
-        // This one will forward to the default one in all cases but the default configuration is empty.
-        Configuration.setConfiguration(new JaasConfiguration(Configuration.getConfiguration()));
-    }
-
     /**
      * Initializes the Kerberos client security context
      * 
@@ -114,7 +108,7 @@
 
                     if (null == currentSubject) {
                         if (useDefaultJaas) {
-                            lc = new LoginContext(configName, null, callback, new JaasConfiguration(null));
+                            lc = new LoginContext(configName, null, callback, new JaasConfiguration(Configuration.getConfiguration()));
                         } else {
                             lc = new LoginContext(configName, callback);
                         }

src/test/java/com/microsoft/sqlserver/jdbc/KerberosTest.java

@@ -16,7 +16,6 @@
 import java.util.HashMap;
 import java.util.Map;
 
-
 @Tag(Constants.kerberos)
 @RunWith(JUnitPlatform.class)
 public class KerberosTest extends AbstractTest {
@@ -26,9 +25,43 @@ public class KerberosTest extends AbstractTest {
 
     @BeforeAll
     public static void setupTests() throws Exception {
+        setJaasConfiguration();
         setConnection();
     }
 
+    private static void setJaasConfiguration() {
+        AppConfigurationEntry[] entries;
+        if (Util.isIBM()) {
+            Map<String, String> confDetailsWithoutPassword = new HashMap<>();
+            confDetailsWithoutPassword.put("useDefaultCcache", "true");
+            Map<String, String> confDetailsWithPassword = new HashMap<>();
+            final String ibmLoginModule = "com.ibm.security.auth.module.Krb5LoginModule";
+            entries = new AppConfigurationEntry[] {
+                    new AppConfigurationEntry(ibmLoginModule, AppConfigurationEntry.LoginModuleControlFlag.SUFFICIENT,
+                            confDetailsWithoutPassword),
+                    new AppConfigurationEntry(ibmLoginModule, AppConfigurationEntry.LoginModuleControlFlag.SUFFICIENT,
+                            confDetailsWithPassword)};
+        } else {
+            Map<String, String> options = new HashMap<>();
+            options.put("useTicketCache", "true");
+            options.put("renewTGT", "true");
+            options.put("doNotPrompt", "false"); // Allow prompting for credentials if necessary
+
+            entries = new AppConfigurationEntry[] {
+                    new AppConfigurationEntry("com.sun.security.auth.module.Krb5LoginModule",
+                            AppConfigurationEntry.LoginModuleControlFlag.REQUIRED, options)};
+        }
+        Configuration.setConfiguration(new Configuration() {
+            @Override
+            public AppConfigurationEntry[] getAppConfigurationEntry(String name) {
+                if ("SQLJDBCDriver".equals(name)) {
+                    return entries;
+                }
+                return null;
+            }
+        });
+    }
+
     @Test
     public void testUseDefaultJaasConfigConnectionStringPropertyTrue() throws Exception {
         String connectionStringUseDefaultJaasConfig = connectionStringKerberos + ";useDefaultJaasConfig=true;";
@@ -96,11 +129,16 @@ private static void createKerberosConnection(String connectionString) throws Exc
      * Overwrites the default JAAS config. Call before making a connection.
      */
     private static void overwriteJaasConfig() {
-        AppConfigurationEntry kafkaClientConfigurationEntry = new AppConfigurationEntry(
+        Map<String, String> options = new HashMap<>();
+        options.put("useTicketCache", "true");
+        options.put("renewTGT", "true");
+        options.put("doNotPrompt", "false"); // Allow prompting for credentials if necessary
+
+        AppConfigurationEntry kerberosConfigurationEntry = new AppConfigurationEntry(
                 "com.sun.security.auth.module.Krb5LoginModule", AppConfigurationEntry.LoginModuleControlFlag.REQUIRED,
-                new HashMap<>());
+                options);
         Map<String, AppConfigurationEntry[]> configurationEntries = new HashMap<>();
-        configurationEntries.put("CLIENT_CONTEXT_NAME", new AppConfigurationEntry[] {kafkaClientConfigurationEntry});
+        configurationEntries.put("SQLJDBCDriver", new AppConfigurationEntry[] {kerberosConfigurationEntry});
         Configuration.setConfiguration(new InternalConfiguration(configurationEntries));
     }