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.internal.*; |
| 34 | import sun.security.krb5.Checksum; |
| 35 | import sun.security.krb5.EncryptedData; |
| 36 | import sun.security.krb5.KrbCryptoException; |
| 37 | import java.security.MessageDigest; |
| 38 | import java.security.Provider; |
| 39 | import java.security.Security; |
| 40 | |
| 41 | public final class DesCbcMd5EType extends DesCbcEType { |
| 42 | |
| 43 | public DesCbcMd5EType() { |
| 44 | } |
| 45 | |
| 46 | public int eType() { |
| 47 | return EncryptedData.ETYPE_DES_CBC_MD5; |
| 48 | } |
| 49 | |
| 50 | public int minimumPadSize() { |
| 51 | return 0; |
| 52 | } |
| 53 | |
| 54 | public int confounderSize() { |
| 55 | return 8; |
| 56 | } |
| 57 | |
| 58 | public int checksumType() { |
| 59 | return Checksum.CKSUMTYPE_RSA_MD5; |
| 60 | } |
| 61 | |
| 62 | public int checksumSize() { |
| 63 | return 16; |
| 64 | } |
| 65 | |
| 66 | /** |
| 67 | * Calculates checksum using MD5. |
| 68 | * @param data the input data. |
| 69 | * @param size the length of data. |
| 70 | * @return the checksum. |
| 71 | * |
| 72 | * @modified by Yanni Zhang, 12/06/99. |
| 73 | */ |
| 74 | protected byte[] calculateChecksum(byte[] data, int size) |
| 75 | throws KrbCryptoException { |
| 76 | MessageDigest md5 = null; |
| 77 | try { |
| 78 | md5 = MessageDigest.getInstance("MD5"); |
| 79 | } catch (Exception e) { |
| 80 | throw new KrbCryptoException("JCE provider may not be installed. " + e.getMessage()); |
| 81 | } |
| 82 | try { |
| 83 | md5.update(data); |
| 84 | return(md5.digest()); |
| 85 | } catch (Exception e) { |
| 86 | throw new KrbCryptoException(e.getMessage()); |
| 87 | } |
| 88 | } |
| 89 | } |