/*

 * 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.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * 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.

 */

/*

 *  (C) Copyright IBM Corp. 1999 All Rights Reserved.

 *  Copyright 1997 The Open Group Research Institute.  All rights reserved.

 */

package sun.security.krb5.internal.crypto;

import sun.security.krb5.Checksum;

import sun.security.krb5.EncryptedData;

import sun.security.krb5.internal.*;

public class NullEType extends EType {

    public NullEType() {

    }

    public int eType() {

        return EncryptedData.ETYPE_NULL;

    }

    public int minimumPadSize() {

        return 0;

    }

    public int confounderSize() {

        return 0;

    }

    public int checksumType() {

        return Checksum.CKSUMTYPE_NULL;

    }

    public int checksumSize() {

        return 0;

    }

    public int blockSize() {

        return 1;

    }

    public int keyType() {

        return Krb5.KEYTYPE_NULL;

    }

    public int keySize() {

        return 0;

    }

    public byte[] encrypt(byte[] data, byte[] key, int usage) {

        byte[] cipher = new byte[data.length];

        System.arraycopy(data, 0, cipher, 0, data.length);

        return cipher;

    }

    public byte[] encrypt(byte[] data, byte[] key, byte[] ivec, int usage) {

        byte[] cipher = new byte[data.length];

        System.arraycopy(data, 0, cipher, 0, data.length);

        return cipher;

    }

    public byte[] decrypt(byte[] cipher, byte[] key, int usage)

        throws KrbApErrException {

            return cipher.clone();

    }

    public byte[] decrypt(byte[] cipher, byte[] key, byte[] ivec, int usage)

        throws KrbApErrException {

            return cipher.clone();

    }

}