J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Portions Copyright 2000-2005 Sun Microsystems, Inc. All Rights Reserved. |
| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 | * |
| 5 | * This code is free software; you can redistribute it and/or modify it |
| 6 | * under the terms of the GNU General Public License version 2 only, as |
| 7 | * published by the Free Software Foundation. Sun designates this |
| 8 | * particular file as subject to the "Classpath" exception as provided |
| 9 | * by Sun in the LICENSE file that accompanied this code. |
| 10 | * |
| 11 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| 14 | * version 2 for more details (a copy is included in the LICENSE file that |
| 15 | * accompanied this code). |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License version |
| 18 | * 2 along with this work; if not, write to the Free Software Foundation, |
| 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| 20 | * |
| 21 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 22 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 23 | * have any questions. |
| 24 | */ |
| 25 | |
| 26 | /* |
| 27 | * |
| 28 | * (C) Copyright IBM Corp. 1999 All Rights Reserved. |
| 29 | * Copyright 1997 The Open Group Research Institute. All rights reserved. |
| 30 | */ |
| 31 | |
| 32 | package sun.security.krb5.internal.crypto; |
| 33 | |
| 34 | import sun.security.krb5.Config; |
| 35 | import sun.security.krb5.Checksum; |
| 36 | import sun.security.krb5.EncryptedData; |
| 37 | import sun.security.krb5.KrbException; |
| 38 | import sun.security.krb5.KrbCryptoException; |
| 39 | import sun.security.krb5.internal.*; |
| 40 | |
| 41 | public abstract class CksumType { |
| 42 | |
| 43 | private static boolean DEBUG = Krb5.DEBUG; |
| 44 | |
| 45 | public static CksumType getInstance(int cksumTypeConst) |
| 46 | throws KdcErrException { |
| 47 | CksumType cksumType = null; |
| 48 | String cksumTypeName = null; |
| 49 | switch (cksumTypeConst) { |
| 50 | case Checksum.CKSUMTYPE_CRC32: |
| 51 | cksumType = new Crc32CksumType(); |
| 52 | cksumTypeName = "sun.security.krb5.internal.crypto.Crc32CksumType"; |
| 53 | break; |
| 54 | case Checksum.CKSUMTYPE_DES_MAC: |
| 55 | cksumType = new DesMacCksumType(); |
| 56 | cksumTypeName = "sun.security.krb5.internal.crypto.DesMacCksumType"; |
| 57 | break; |
| 58 | case Checksum.CKSUMTYPE_DES_MAC_K: |
| 59 | cksumType = new DesMacKCksumType(); |
| 60 | cksumTypeName = |
| 61 | "sun.security.krb5.internal.crypto.DesMacKCksumType"; |
| 62 | break; |
| 63 | case Checksum.CKSUMTYPE_RSA_MD5: |
| 64 | cksumType = new RsaMd5CksumType(); |
| 65 | cksumTypeName = "sun.security.krb5.internal.crypto.RsaMd5CksumType"; |
| 66 | break; |
| 67 | case Checksum.CKSUMTYPE_RSA_MD5_DES: |
| 68 | cksumType = new RsaMd5DesCksumType(); |
| 69 | cksumTypeName = |
| 70 | "sun.security.krb5.internal.crypto.RsaMd5DesCksumType"; |
| 71 | break; |
| 72 | |
| 73 | case Checksum.CKSUMTYPE_HMAC_SHA1_DES3_KD: |
| 74 | cksumType = new HmacSha1Des3KdCksumType(); |
| 75 | cksumTypeName = |
| 76 | "sun.security.krb5.internal.crypto.HmacSha1Des3KdCksumType"; |
| 77 | break; |
| 78 | |
| 79 | case Checksum.CKSUMTYPE_HMAC_SHA1_96_AES128: |
| 80 | cksumType = new HmacSha1Aes128CksumType(); |
| 81 | cksumTypeName = |
| 82 | "sun.security.krb5.internal.crypto.HmacSha1Aes128CksumType"; |
| 83 | break; |
| 84 | case Checksum.CKSUMTYPE_HMAC_SHA1_96_AES256: |
| 85 | cksumType = new HmacSha1Aes256CksumType(); |
| 86 | cksumTypeName = |
| 87 | "sun.security.krb5.internal.crypto.HmacSha1Aes256CksumType"; |
| 88 | break; |
| 89 | |
| 90 | case Checksum.CKSUMTYPE_HMAC_MD5_ARCFOUR: |
| 91 | cksumType = new HmacMd5ArcFourCksumType(); |
| 92 | cksumTypeName = |
| 93 | "sun.security.krb5.internal.crypto.HmacMd5ArcFourCksumType"; |
| 94 | break; |
| 95 | |
| 96 | // currently we don't support MD4. |
| 97 | case Checksum.CKSUMTYPE_RSA_MD4_DES_K: |
| 98 | // cksumType = new RsaMd4DesKCksumType(); |
| 99 | // cksumTypeName = |
| 100 | // "sun.security.krb5.internal.crypto.RsaMd4DesKCksumType"; |
| 101 | case Checksum.CKSUMTYPE_RSA_MD4: |
| 102 | // cksumType = new RsaMd4CksumType(); |
| 103 | // linux box support rsamd4, how to solve conflict? |
| 104 | // cksumTypeName = |
| 105 | // "sun.security.krb5.internal.crypto.RsaMd4CksumType"; |
| 106 | case Checksum.CKSUMTYPE_RSA_MD4_DES: |
| 107 | // cksumType = new RsaMd4DesCksumType(); |
| 108 | // cksumTypeName = |
| 109 | // "sun.security.krb5.internal.crypto.RsaMd4DesCksumType"; |
| 110 | |
| 111 | default: |
| 112 | throw new KdcErrException(Krb5.KDC_ERR_SUMTYPE_NOSUPP); |
| 113 | } |
| 114 | if (DEBUG) { |
| 115 | System.out.println(">>> CksumType: " + cksumTypeName); |
| 116 | } |
| 117 | return cksumType; |
| 118 | } |
| 119 | |
| 120 | |
| 121 | /** |
| 122 | * Returns default checksum type. |
| 123 | */ |
| 124 | public static CksumType getInstance() throws KdcErrException { |
| 125 | // this method provided for Kerberos applications. |
| 126 | int cksumType = Checksum.CKSUMTYPE_RSA_MD5; // default |
| 127 | try { |
| 128 | Config c = Config.getInstance(); |
| 129 | if ((cksumType = (c.getType(c.getDefault("ap_req_checksum_type", |
| 130 | "libdefaults")))) == - 1) { |
| 131 | if ((cksumType = c.getType(c.getDefault("checksum_type", |
| 132 | "libdefaults"))) == -1) { |
| 133 | cksumType = Checksum.CKSUMTYPE_RSA_MD5; // default |
| 134 | } |
| 135 | } |
| 136 | } catch (KrbException e) { |
| 137 | } |
| 138 | return getInstance(cksumType); |
| 139 | } |
| 140 | |
| 141 | public abstract int confounderSize(); |
| 142 | |
| 143 | public abstract int cksumType(); |
| 144 | |
| 145 | public abstract boolean isSafe(); |
| 146 | |
| 147 | public abstract int cksumSize(); |
| 148 | |
| 149 | public abstract int keyType(); |
| 150 | |
| 151 | public abstract int keySize(); |
| 152 | |
| 153 | public abstract byte[] calculateChecksum(byte[] data, int size) |
| 154 | throws KrbCryptoException; |
| 155 | |
| 156 | public abstract byte[] calculateKeyedChecksum(byte[] data, int size, |
| 157 | byte[] key, int usage) throws KrbCryptoException; |
| 158 | |
| 159 | public abstract boolean verifyKeyedChecksum(byte[] data, int size, |
| 160 | byte[] key, byte[] checksum, int usage) throws KrbCryptoException; |
| 161 | |
| 162 | public static boolean isChecksumEqual(byte[] cksum1, byte[] cksum2) { |
| 163 | if (cksum1 == cksum2) |
| 164 | return true; |
| 165 | if ((cksum1 == null && cksum2 != null) || |
| 166 | (cksum1 != null && cksum2 == null)) |
| 167 | return false; |
| 168 | if (cksum1.length != cksum2.length) |
| 169 | return false; |
| 170 | for (int i = 0; i < cksum1.length; i++) |
| 171 | if (cksum1[i] != cksum2[i]) |
| 172 | return false; |
| 173 | return true; |
| 174 | } |
| 175 | |
| 176 | } |