| J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Portions Copyright 2000-2004 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; |
| 33 | |
| 34 | import sun.security.krb5.EncryptionKey; |
| 35 | import sun.security.krb5.internal.*; |
| 36 | import sun.security.krb5.internal.crypto.*; |
| 37 | import java.io.IOException; |
| 38 | |
| 39 | class KrbSafe extends KrbAppMessage { |
| 40 | |
| 41 | private byte[] obuf; |
| 42 | private byte[] userData; |
| 43 | |
| 44 | public KrbSafe(byte[] userData, |
| 45 | Credentials creds, |
| 46 | EncryptionKey subKey, |
| 47 | KerberosTime timestamp, |
| 48 | SeqNumber seqNumber, |
| 49 | HostAddress saddr, |
| 50 | HostAddress raddr |
| 51 | ) throws KrbException, IOException { |
| 52 | EncryptionKey reqKey = null; |
| 53 | if (subKey != null) |
| 54 | reqKey = subKey; |
| 55 | else |
| 56 | reqKey = creds.key; |
| 57 | |
| 58 | obuf = mk_safe(userData, |
| 59 | reqKey, |
| 60 | timestamp, |
| 61 | seqNumber, |
| 62 | saddr, |
| 63 | raddr |
| 64 | ); |
| 65 | } |
| 66 | |
| 67 | public KrbSafe(byte[] msg, |
| 68 | Credentials creds, |
| 69 | EncryptionKey subKey, |
| 70 | SeqNumber seqNumber, |
| 71 | HostAddress saddr, |
| 72 | HostAddress raddr, |
| 73 | boolean timestampRequired, |
| 74 | boolean seqNumberRequired |
| 75 | ) throws KrbException, IOException { |
| 76 | |
| 77 | KRBSafe krb_safe = new KRBSafe(msg); |
| 78 | |
| 79 | EncryptionKey reqKey = null; |
| 80 | if (subKey != null) |
| 81 | reqKey = subKey; |
| 82 | else |
| 83 | reqKey = creds.key; |
| 84 | |
| 85 | userData = rd_safe( |
| 86 | krb_safe, |
| 87 | reqKey, |
| 88 | seqNumber, |
| 89 | saddr, |
| 90 | raddr, |
| 91 | timestampRequired, |
| 92 | seqNumberRequired, |
| 93 | creds.client, |
| 94 | creds.client.getRealm() |
| 95 | ); |
| 96 | } |
| 97 | |
| 98 | public byte[] getMessage() { |
| 99 | return obuf; |
| 100 | } |
| 101 | |
| 102 | public byte[] getData() { |
| 103 | return userData; |
| 104 | } |
| 105 | |
| 106 | private byte[] mk_safe(byte[] userData, |
| 107 | EncryptionKey key, |
| 108 | KerberosTime timestamp, |
| 109 | SeqNumber seqNumber, |
| 110 | HostAddress sAddress, |
| 111 | HostAddress rAddress |
| 112 | ) throws Asn1Exception, IOException, KdcErrException, |
| 113 | KrbApErrException, KrbCryptoException { |
| 114 | |
| 115 | Integer usec = null; |
| 116 | Integer seqno = null; |
| 117 | |
| 118 | if (timestamp != null) |
| 119 | usec = new Integer(timestamp.getMicroSeconds()); |
| 120 | |
| 121 | if (seqNumber != null) { |
| 122 | seqno = new Integer(seqNumber.current()); |
| 123 | seqNumber.step(); |
| 124 | } |
| 125 | |
| 126 | KRBSafeBody krb_safeBody = |
| 127 | new KRBSafeBody(userData, |
| 128 | timestamp, |
| 129 | usec, |
| 130 | seqno, |
| 131 | sAddress, |
| 132 | rAddress |
| 133 | ); |
| 134 | |
| 135 | byte[] temp = krb_safeBody.asn1Encode(); |
| 136 | Checksum cksum = new Checksum( |
| 137 | Checksum.SAFECKSUMTYPE_DEFAULT, |
| 138 | temp, |
| 139 | key, |
| 140 | KeyUsage.KU_KRB_SAFE_CKSUM |
| 141 | ); |
| 142 | |
| 143 | KRBSafe krb_safe = new KRBSafe(krb_safeBody, cksum); |
| 144 | |
| 145 | temp = krb_safe.asn1Encode(); |
| 146 | |
| 147 | return krb_safe.asn1Encode(); |
| 148 | } |
| 149 | |
| 150 | private byte[] rd_safe(KRBSafe krb_safe, |
| 151 | EncryptionKey key, |
| 152 | SeqNumber seqNumber, |
| 153 | HostAddress sAddress, |
| 154 | HostAddress rAddress, |
| 155 | boolean timestampRequired, |
| 156 | boolean seqNumberRequired, |
| 157 | PrincipalName cname, |
| 158 | Realm crealm |
| 159 | ) throws Asn1Exception, KdcErrException, |
| 160 | KrbApErrException, IOException, KrbCryptoException { |
| 161 | |
| 162 | byte[] temp = krb_safe.safeBody.asn1Encode(); |
| 163 | |
| 164 | if (!krb_safe.cksum.verifyKeyedChecksum(temp, key, |
| 165 | KeyUsage.KU_KRB_SAFE_CKSUM)) { |
| 166 | throw new KrbApErrException( |
| 167 | Krb5.KRB_AP_ERR_MODIFIED); |
| 168 | } |
| 169 | |
| 170 | check(krb_safe.safeBody.timestamp, |
| 171 | krb_safe.safeBody.usec, |
| 172 | krb_safe.safeBody.seqNumber, |
| 173 | krb_safe.safeBody.sAddress, |
| 174 | krb_safe.safeBody.rAddress, |
| 175 | seqNumber, |
| 176 | sAddress, |
| 177 | rAddress, |
| 178 | timestampRequired, |
| 179 | seqNumberRequired, |
| 180 | cname, |
| 181 | crealm |
| 182 | ); |
| 183 | |
| 184 | return krb_safe.safeBody.userData; |
| 185 | } |
| 186 | } |