jdbc kerberos oracle authentication

I'm sharing this piece of code which has been working for me. Have you set the location of the kerberos cache file?

OracleDriver driver = new OracleDriver();
Properties prop = new Properties();

prop.setProperty(OracleConnection.CONNECTION_PROPERTY_THIN_NET_AUTHENTICATION_SERVICES,
  "("+AnoServices.AUTHENTICATION_KERBEROS5+")");  
prop.setProperty(OracleConnection.CONNECTION_PROPERTY_THIN_NET_AUTHENTICATION_KRB5_MUTUAL,
  "true");    

/* If you get the following error [Unable to obtain Principal Name for 
 * authentication] although you know that you have the right TGT in your
 * credential cache, then it's probably because the JVM can't locate your
 * cache.
 * For example, here my credential cache is
 *        C:\Documents and Settings\Jean de Lavarene\krb5cc
 * because when I run klist I get the following:
 *   > ./klist
 *   Ticket cache: FILE:C:\Documents and Settings\Jean de Lavarene\krb5cc
 *   Default principal: [email protected]
 *
 *   Valid starting     Expires            Service principal
 *   06/21/16 13:23:02  06/21/16 23:23:02  krbtgt/[email protected]
 *   renew until 06/21/16 13:23:02
 * This isn't the default location, so I need to provide the location. Note
 * that the default location on windows is "C:\Documents and Settings\krb5cc_username".
 */
prop.setProperty(OracleConnection.CONNECTION_PROPERTY_THIN_NET_AUTHENTICATION_KRB5_CC_NAME,
  "C:\\Documents and Settings\\Jean de Lavarene\\krb5cc");
Connection conn  = driver.connect(url,prop);
String auth = ((OracleConnection)conn).getAuthenticationAdaptorName();
System.out.println("Authentication adaptor="+auth);

This is solution for Win10/Win2019 where Credential Guard is in place (the trick with AllowTgtSessionKey=1 does not work anymore).

Kerberos ticket has to be generated using SSPI API. Works since JDK 11.0.10.

import java.sql.ResultSet;
import java.sql.Statement;

import java.util.Properties;

import org.ietf.jgss.GSSCredential;
import org.ietf.jgss.GSSManager;
import org.ietf.jgss.GSSName;
import org.ietf.jgss.Oid;

import oracle.jdbc.OracleConnection;
import oracle.jdbc.OracleConnectionBuilder;
import oracle.jdbc.pool.OracleDataSource;
import oracle.net.ano.AnoServices;

public class Test3 {
    String username = System.getProperty("user.name");
    String domain = System.getenv("USERDNSDOMAIN");
    String url = "jdbc:oracle:thin:@//dbatdb1:1521/TEST_1";

    public Test3() {
    }

    public void doit() throws Exception
    {
        // set env. variable to enable tracing in sspi_bridge.dll
        // set SSPI_BRIDGE_TRACE=1
        //System.setProperty("oracle.jdbc.Trace", "true");
        //System.setProperty("sun.security.krb5.debug", "true");
        //System.setProperty("sun.security.spnego.debug", "true");
        //System.setProperty("sun.security.jgss.debug", "true");
        //System.setProperty("java.security.debug", "true");
        //System.setProperty("sun.security.nativegss.debug", "true");

        //System.setProperty("java.security.krb5.conf", "D:/oracle/WINDOWS.X64_193000_client_home/network/admin/krb5.conf");
        System.setProperty("sun.security.jgss.native", "true");
        System.setProperty("sun.security.jgss.lib", "sspi_bridge.dll");

        Oid krb5Oid = new Oid("1.2.840.113554.1.2.2");
        GSSManager manager = GSSManager.getInstance();

        GSSName srcName = manager.createName(username + "@" + domain, GSSName.NT_USER_NAME);
        GSSCredential cred = manager.createCredential(srcName
                , GSSCredential.DEFAULT_LIFETIME
                , krb5Oid, GSSCredential.INITIATE_ONLY);

        Properties prop = new Properties();
        prop.setProperty(AnoServices.AUTHENTICATION_PROPERTY_SERVICES, "(" + AnoServices.AUTHENTICATION_KERBEROS5 + ")");
        prop.setProperty(OracleConnection.CONNECTION_PROPERTY_THIN_NET_AUTHENTICATION_SERVICES,"( " + AnoServices.AUTHENTICATION_KERBEROS5 + " )");
        prop.setProperty(OracleConnection.CONNECTION_PROPERTY_THIN_NET_AUTHENTICATION_KRB5_MUTUAL, "true");

        OracleDataSource ods = new OracleDataSource();
        ods.setURL(url);
        ods.setConnectionProperties(prop);
        OracleConnectionBuilder builder = ods.createConnectionBuilder();
        OracleConnection conn = builder.gssCredential(cred).build();
        
        String auth = ((OracleConnection)conn).getAuthenticationAdaptorName();
        System.out.println("Authentication adaptor="+auth);

        String sql = "select user from dual";
        Statement stmt = conn.createStatement();
        ResultSet rs = stmt.executeQuery(sql);
        while (rs.next())
            System.out.println("whoami: " + rs.getString(1));

        conn.close();
    }

    public static void main(String[] args) {
        Test3 test = new Test3();
        try {
            test.doit();
            System.out.println("Done");
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}