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/*
* 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.KrbCryptoException;
import sun.security.krb5.internal.*;
public class DesCbcCrcEType extends DesCbcEType {
public DesCbcCrcEType() {
}
public int eType() {
return EncryptedData.ETYPE_DES_CBC_CRC;
}
public int minimumPadSize() {
return 4;
}
public int confounderSize() {
return 8;
}
public int checksumType() {
return Checksum.CKSUMTYPE_CRC32;
}
public int checksumSize() {
return 4;
}
/**
* Encrypts data using DES in CBC mode with CRC32.
* @param data the data to be encrypted.
* @param key the secret key to encrypt the data. It is also used as initialization vector during cipher block chaining.
* @return the buffer for cipher text.
*
* @written by Yanni Zhang, Dec 10, 1999
*/
public byte[] encrypt(byte[] data, byte[] key, int usage)
throws KrbCryptoException {
return encrypt(data, key, key, usage);
}
/**
* Decrypts data with provided key using DES in CBC mode with CRC32.
* @param cipher the cipher text to be decrypted.
* @param key the secret key to decrypt the data.
*
* @written by Yanni Zhang, Dec 10, 1999
*/
public byte[] decrypt(byte[] cipher, byte[] key, int usage)
throws KrbApErrException, KrbCryptoException{
return decrypt(cipher, key, key, usage);
}
protected byte[] calculateChecksum(byte[] data, int size) {
return crc32.byte2crc32sum_bytes(data, size);
}
}
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