| /* |
| * 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); |
| } |
| |
| } |