J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 3 | * |
| 4 | * This code is free software; you can redistribute it and/or modify it |
| 5 | * under the terms of the GNU General Public License version 2 only, as |
| 6 | * published by the Free Software Foundation. Sun designates this |
| 7 | * particular file as subject to the "Classpath" exception as provided |
| 8 | * by Sun in the LICENSE file that accompanied this code. |
| 9 | * |
| 10 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| 11 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 12 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| 13 | * version 2 for more details (a copy is included in the LICENSE file that |
| 14 | * accompanied this code). |
| 15 | * |
| 16 | * You should have received a copy of the GNU General Public License version |
| 17 | * 2 along with this work; if not, write to the Free Software Foundation, |
| 18 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| 19 | * |
| 20 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 21 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 22 | * have any questions. |
| 23 | */ |
| 24 | |
| 25 | /* |
| 26 | * |
| 27 | * (C) Copyright IBM Corp. 1999 All Rights Reserved. |
| 28 | * Copyright 1997 The Open Group Research Institute. All rights reserved. |
| 29 | */ |
| 30 | |
| 31 | package sun.security.krb5.internal.crypto; |
| 32 | |
| 33 | import sun.security.krb5.*; |
| 34 | import sun.security.krb5.internal.*; |
| 35 | import java.util.zip.CRC32; |
| 36 | |
| 37 | public class Crc32CksumType extends CksumType { |
| 38 | |
| 39 | public Crc32CksumType() { |
| 40 | } |
| 41 | |
| 42 | public int confounderSize() { |
| 43 | return 0; |
| 44 | } |
| 45 | |
| 46 | public int cksumType() { |
| 47 | return Checksum.CKSUMTYPE_CRC32; |
| 48 | } |
| 49 | |
| 50 | public boolean isSafe() { |
| 51 | return false; |
| 52 | } |
| 53 | |
| 54 | public int cksumSize() { |
| 55 | return 4; |
| 56 | } |
| 57 | |
| 58 | public int keyType() { |
| 59 | return Krb5.KEYTYPE_NULL; |
| 60 | } |
| 61 | |
| 62 | public int keySize() { |
| 63 | return 0; |
| 64 | } |
| 65 | |
| 66 | public byte[] calculateChecksum(byte[] data, int size) { |
| 67 | return crc32.byte2crc32sum_bytes(data, size); |
| 68 | } |
| 69 | |
| 70 | public byte[] calculateKeyedChecksum(byte[] data, int size, |
| 71 | byte[] key, int usage) { |
| 72 | return null; |
| 73 | } |
| 74 | |
| 75 | public boolean verifyKeyedChecksum(byte[] data, int size, |
| 76 | byte[] key, byte[] checksum, int usage) { |
| 77 | return false; |
| 78 | } |
| 79 | |
| 80 | public static byte[] int2quad(long input) { |
| 81 | byte[] output = new byte[4]; |
| 82 | for (int i = 0; i < 4; i++) { |
| 83 | output[i] = (byte)((input >>> (i * 8)) & 0xff); |
| 84 | } |
| 85 | return output; |
| 86 | } |
| 87 | |
| 88 | public static long bytes2long(byte[] input) { |
| 89 | long result = 0; |
| 90 | |
| 91 | result |= (((long)input[0]) & 0xffL) << 24; |
| 92 | result |= (((long)input[1]) & 0xffL) << 16; |
| 93 | result |= (((long)input[2]) & 0xffL) << 8; |
| 94 | result |= (((long)input[3]) & 0xffL); |
| 95 | return result; |
| 96 | } |
| 97 | } |