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Java example source code file (HighestKvno.java)

This example Java source code file (HighestKvno.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

encryptionkey, exception, fileoutputstream, highest, highestkvno, keytab, principalname

The HighestKvno.java Java example source code

/*
 * Copyright (c) 2009, 2011, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */
/*
 * @test
 * @bug 6867665
 * @bug 6875033
 * @run main/othervm HighestKvno
 * @summary Problem with keytabs with multiple kvno's (key versions)
 */

import sun.security.krb5.internal.ktab.*;
import sun.security.krb5.*;
import java.io.File;
import java.io.FileOutputStream;

public class HighestKvno {

    public static void main(String[] args) throws Exception {
        // kt is a keytab including these entries:
        //
        // me@MAD.LOCAL: Type: 3, KVNO: 4
        // me@MAD.LOCAL: Type: 23, KVNO: 4
        // me@MAD.LOCAL: Type: 16, KVNO: 4
        // me@MAD.LOCAL: Type: 1, KVNO: 5
        // me@MAD.LOCAL: Type: 17, KVNO: 5
        // me@MAD.LOCAL: Type: 18, KVNO: 5
        // me@MAD.LOCAL: Type: 1, KVNO: 3
        // me@MAD.LOCAL: Type: 17, KVNO: 3
        // me@MAD.LOCAL: Type: 18, KVNO: 3
        // he@MAD.LOCAL: Type: 1, KVNO: 1
        // he@MAD.LOCAL: Type: 17, KVNO: 1
        // he@MAD.LOCAL: Type: 18, KVNO: 1
        //
        // This file is created with these steps:
        // 1. Modify JRE's Ktab.java so that adding new entries
        //    does not remove the old one.
        // 2. Run the modified Ktab to create 4 sets of keys
        // 3. Manually hex edit the KVNO as above

        byte[] kt = {
            (byte)0x05, (byte)0x02, (byte)0x00, (byte)0x00,
            (byte)0x00, (byte)0x26, (byte)0x00, (byte)0x01,
            (byte)0x00, (byte)0x09, (byte)0x4D, (byte)0x41,
            (byte)0x44, (byte)0x2E, (byte)0x4C, (byte)0x4F,
            (byte)0x43, (byte)0x41, (byte)0x4C, (byte)0x00,
            (byte)0x02, (byte)0x6D, (byte)0x65, (byte)0x00,
            (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x4A,
            (byte)0x79, (byte)0x45, (byte)0xCD, (byte)0x04,
            (byte)0x00, (byte)0x03, (byte)0x00, (byte)0x08,
            (byte)0xE6, (byte)0xB0, (byte)0x07, (byte)0xA8,
            (byte)0x5B, (byte)0xF8, (byte)0x73, (byte)0xAD,
            (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x2E,
            (byte)0x00, (byte)0x01, (byte)0x00, (byte)0x09,
            (byte)0x4D, (byte)0x41, (byte)0x44, (byte)0x2E,
            (byte)0x4C, (byte)0x4F, (byte)0x43, (byte)0x41,
            (byte)0x4C, (byte)0x00, (byte)0x02, (byte)0x6D,
            (byte)0x65, (byte)0x00, (byte)0x00, (byte)0x00,
            (byte)0x00, (byte)0x4A, (byte)0x79, (byte)0x45,
            (byte)0xCD, (byte)0x04, (byte)0x00, (byte)0x17,
            (byte)0x00, (byte)0x10, (byte)0x50, (byte)0x92,
            (byte)0x01, (byte)0x6B, (byte)0xCF, (byte)0x5A,
            (byte)0x2A, (byte)0x7A, (byte)0x4F, (byte)0xE8,
            (byte)0x39, (byte)0xD9, (byte)0x90, (byte)0xB5,
            (byte)0x9C, (byte)0xEB, (byte)0x00, (byte)0x00,
            (byte)0x00, (byte)0x36, (byte)0x00, (byte)0x01,
            (byte)0x00, (byte)0x09, (byte)0x4D, (byte)0x41,
            (byte)0x44, (byte)0x2E, (byte)0x4C, (byte)0x4F,
            (byte)0x43, (byte)0x41, (byte)0x4C, (byte)0x00,
            (byte)0x02, (byte)0x6D, (byte)0x65, (byte)0x00,
            (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x4A,
            (byte)0x79, (byte)0x45, (byte)0xCD, (byte)0x04,
            (byte)0x00, (byte)0x10, (byte)0x00, (byte)0x18,
            (byte)0xDF, (byte)0xDF, (byte)0x62, (byte)0x86,
            (byte)0x37, (byte)0xCE, (byte)0x29, (byte)0xBA,
            (byte)0xBC, (byte)0x23, (byte)0x15, (byte)0xDC,
            (byte)0x86, (byte)0x7C, (byte)0xB6, (byte)0x89,
            (byte)0x25, (byte)0x25, (byte)0xCD, (byte)0x4A,
            (byte)0x9B, (byte)0xCE, (byte)0xF4, (byte)0xAE,
            (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x26,
            (byte)0x00, (byte)0x01, (byte)0x00, (byte)0x09,
            (byte)0x4D, (byte)0x41, (byte)0x44, (byte)0x2E,
            (byte)0x4C, (byte)0x4F, (byte)0x43, (byte)0x41,
            (byte)0x4C, (byte)0x00, (byte)0x02, (byte)0x6D,
            (byte)0x65, (byte)0x00, (byte)0x00, (byte)0x00,
            (byte)0x00, (byte)0x4A, (byte)0x79, (byte)0x4B,
            (byte)0x5E, (byte)0x05, (byte)0x00, (byte)0x01,
            (byte)0x00, (byte)0x08, (byte)0xE6, (byte)0xB0,
            (byte)0x07, (byte)0xA8, (byte)0x5B, (byte)0xF8,
            (byte)0x73, (byte)0xAD, (byte)0x00, (byte)0x00,
            (byte)0x00, (byte)0x2E, (byte)0x00, (byte)0x01,
            (byte)0x00, (byte)0x09, (byte)0x4D, (byte)0x41,
            (byte)0x44, (byte)0x2E, (byte)0x4C, (byte)0x4F,
            (byte)0x43, (byte)0x41, (byte)0x4C, (byte)0x00,
            (byte)0x02, (byte)0x6D, (byte)0x65, (byte)0x00,
            (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x4A,
            (byte)0x79, (byte)0x4B, (byte)0x5E, (byte)0x05,
            (byte)0x00, (byte)0x11, (byte)0x00, (byte)0x10,
            (byte)0xEA, (byte)0xF5, (byte)0xA8, (byte)0x36,
            (byte)0xA5, (byte)0x3E, (byte)0x5F, (byte)0x5C,
            (byte)0x26, (byte)0xE9, (byte)0xDD, (byte)0x8B,
            (byte)0x8C, (byte)0xE8, (byte)0x92, (byte)0x9C,
            (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x3E,
            (byte)0x00, (byte)0x01, (byte)0x00, (byte)0x09,
            (byte)0x4D, (byte)0x41, (byte)0x44, (byte)0x2E,
            (byte)0x4C, (byte)0x4F, (byte)0x43, (byte)0x41,
            (byte)0x4C, (byte)0x00, (byte)0x02, (byte)0x6D,
            (byte)0x65, (byte)0x00, (byte)0x00, (byte)0x00,
            (byte)0x00, (byte)0x4A, (byte)0x79, (byte)0x4B,
            (byte)0x5E, (byte)0x05, (byte)0x00, (byte)0x12,
            (byte)0x00, (byte)0x20, (byte)0x68, (byte)0xBE,
            (byte)0xD4, (byte)0x17, (byte)0x3A, (byte)0x06,
            (byte)0xE0, (byte)0x0C, (byte)0x62, (byte)0x11,
            (byte)0xB7, (byte)0x53, (byte)0x1B, (byte)0x3E,
            (byte)0xB2, (byte)0x6B, (byte)0x0D, (byte)0x48,
            (byte)0xD8, (byte)0x52, (byte)0x5A, (byte)0x4C,
            (byte)0xBE, (byte)0x24, (byte)0xBB, (byte)0x3D,
            (byte)0xC1, (byte)0x74, (byte)0x69, (byte)0xDA,
            (byte)0x34, (byte)0x98, (byte)0x00, (byte)0x00,
            (byte)0x00, (byte)0x26, (byte)0x00, (byte)0x01,
            (byte)0x00, (byte)0x09, (byte)0x4D, (byte)0x41,
            (byte)0x44, (byte)0x2E, (byte)0x4C, (byte)0x4F,
            (byte)0x43, (byte)0x41, (byte)0x4C, (byte)0x00,
            (byte)0x02, (byte)0x6D, (byte)0x65, (byte)0x00,
            (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x4A,
            (byte)0x79, (byte)0x51, (byte)0x27, (byte)0x03,
            (byte)0x00, (byte)0x01, (byte)0x00, (byte)0x08,
            (byte)0xE6, (byte)0xB0, (byte)0x07, (byte)0xA8,
            (byte)0x5B, (byte)0xF8, (byte)0x73, (byte)0xAD,
            (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x2E,
            (byte)0x00, (byte)0x01, (byte)0x00, (byte)0x09,
            (byte)0x4D, (byte)0x41, (byte)0x44, (byte)0x2E,
            (byte)0x4C, (byte)0x4F, (byte)0x43, (byte)0x41,
            (byte)0x4C, (byte)0x00, (byte)0x02, (byte)0x6D,
            (byte)0x65, (byte)0x00, (byte)0x00, (byte)0x00,
            (byte)0x00, (byte)0x4A, (byte)0x79, (byte)0x51,
            (byte)0x27, (byte)0x03, (byte)0x00, (byte)0x11,
            (byte)0x00, (byte)0x10, (byte)0xEA, (byte)0xF5,
            (byte)0xA8, (byte)0x36, (byte)0xA5, (byte)0x3E,
            (byte)0x5F, (byte)0x5C, (byte)0x26, (byte)0xE9,
            (byte)0xDD, (byte)0x8B, (byte)0x8C, (byte)0xE8,
            (byte)0x92, (byte)0x9C, (byte)0x00, (byte)0x00,
            (byte)0x00, (byte)0x3E, (byte)0x00, (byte)0x01,
            (byte)0x00, (byte)0x09, (byte)0x4D, (byte)0x41,
            (byte)0x44, (byte)0x2E, (byte)0x4C, (byte)0x4F,
            (byte)0x43, (byte)0x41, (byte)0x4C, (byte)0x00,
            (byte)0x02, (byte)0x6D, (byte)0x65, (byte)0x00,
            (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x4A,
            (byte)0x79, (byte)0x51, (byte)0x27, (byte)0x03,
            (byte)0x00, (byte)0x12, (byte)0x00, (byte)0x20,
            (byte)0x68, (byte)0xBE, (byte)0xD4, (byte)0x17,
            (byte)0x3A, (byte)0x06, (byte)0xE0, (byte)0x0C,
            (byte)0x62, (byte)0x11, (byte)0xB7, (byte)0x53,
            (byte)0x1B, (byte)0x3E, (byte)0xB2, (byte)0x6B,
            (byte)0x0D, (byte)0x48, (byte)0xD8, (byte)0x52,
            (byte)0x5A, (byte)0x4C, (byte)0xBE, (byte)0x24,
            (byte)0xBB, (byte)0x3D, (byte)0xC1, (byte)0x74,
            (byte)0x69, (byte)0xDA, (byte)0x34, (byte)0x98,
            (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x26,
            (byte)0x00, (byte)0x01, (byte)0x00, (byte)0x09,
            (byte)0x4D, (byte)0x41, (byte)0x44, (byte)0x2E,
            (byte)0x4C, (byte)0x4F, (byte)0x43, (byte)0x41,
            (byte)0x4C, (byte)0x00, (byte)0x02, (byte)0x68,
            (byte)0x65, (byte)0x00, (byte)0x00, (byte)0x00,
            (byte)0x00, (byte)0x4A, (byte)0x79, (byte)0x54,
            (byte)0xC7, (byte)0x01, (byte)0x00, (byte)0x01,
            (byte)0x00, (byte)0x08, (byte)0x85, (byte)0x5B,
            (byte)0xE3, (byte)0x13, (byte)0x3E, (byte)0xF8,
            (byte)0x76, (byte)0xEC, (byte)0x00, (byte)0x00,
            (byte)0x00, (byte)0x2E, (byte)0x00, (byte)0x01,
            (byte)0x00, (byte)0x09, (byte)0x4D, (byte)0x41,
            (byte)0x44, (byte)0x2E, (byte)0x4C, (byte)0x4F,
            (byte)0x43, (byte)0x41, (byte)0x4C, (byte)0x00,
            (byte)0x02, (byte)0x68, (byte)0x65, (byte)0x00,
            (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x4A,
            (byte)0x79, (byte)0x54, (byte)0xC7, (byte)0x01,
            (byte)0x00, (byte)0x11, (byte)0x00, (byte)0x10,
            (byte)0xEC, (byte)0xCC, (byte)0x16, (byte)0xCD,
            (byte)0xE8, (byte)0x51, (byte)0x46, (byte)0x4C,
            (byte)0x1B, (byte)0x57, (byte)0xAE, (byte)0x19,
            (byte)0xC3, (byte)0xD2, (byte)0x55, (byte)0x1B,
            (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x3E,
            (byte)0x00, (byte)0x01, (byte)0x00, (byte)0x09,
            (byte)0x4D, (byte)0x41, (byte)0x44, (byte)0x2E,
            (byte)0x4C, (byte)0x4F, (byte)0x43, (byte)0x41,
            (byte)0x4C, (byte)0x00, (byte)0x02, (byte)0x68,
            (byte)0x65, (byte)0x00, (byte)0x00, (byte)0x00,
            (byte)0x00, (byte)0x4A, (byte)0x79, (byte)0x54,
            (byte)0xC7, (byte)0x01, (byte)0x00, (byte)0x12,
            (byte)0x00, (byte)0x20, (byte)0xAE, (byte)0xBA,
            (byte)0xCB, (byte)0xF5, (byte)0xA8, (byte)0x09,
            (byte)0xC1, (byte)0xB0, (byte)0x2C, (byte)0x2A,
            (byte)0x3D, (byte)0x96, (byte)0x2C, (byte)0x2D,
            (byte)0xF5, (byte)0xFE, (byte)0x65, (byte)0xEC,
            (byte)0x75, (byte)0x72, (byte)0x5B, (byte)0x46,
            (byte)0x84, (byte)0xD7, (byte)0x49, (byte)0x3E,
            (byte)0xF2, (byte)0x27, (byte)0x32, (byte)0x69,
            (byte)0x75, (byte)0x9B,
        };
        System.setProperty("java.security.krb5.conf",
                new File(System.getProperty("test.src"),
                    "../krb5.conf").getAbsolutePath());
        FileOutputStream fout = new FileOutputStream("kt");
        fout.write(kt);
        fout.close();
        KeyTab ktab = KeyTab.getInstance("kt");
        PrincipalName pn = new PrincipalName("me@MAD.LOCAL");
        EncryptionKey[] keys = ktab.readServiceKeys(pn);
        if (keys[0].getKeyVersionNumber() != 5) {
            throw new Exception("Highest not first");
        }
        new File("kt").delete();
    }
}

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