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; |
| 32 | |
| 33 | import sun.security.krb5.EncryptedData; |
| 34 | import sun.security.krb5.Asn1Exception; |
| 35 | import sun.security.krb5.RealmException; |
| 36 | import sun.security.util.*; |
| 37 | import java.util.Vector; |
| 38 | import java.io.IOException; |
| 39 | import java.math.BigInteger; |
| 40 | |
| 41 | /** |
| 42 | * Implements the ASN.1 Authenticator type. |
| 43 | * |
| 44 | * <xmp> |
| 45 | * KRB-CRED ::= [APPLICATION 22] SEQUENCE { |
| 46 | * pvno [0] INTEGER (5), |
| 47 | * msg-type [1] INTEGER (22), |
| 48 | * tickets [2] SEQUENCE OF Ticket, |
| 49 | * enc-part [3] EncryptedData -- EncKrbCredPart |
| 50 | * } |
| 51 | * </xmp> |
| 52 | * |
| 53 | * <p> |
| 54 | * This definition reflects the Network Working Group RFC 4120 |
| 55 | * specification available at |
| 56 | * <a href="http://www.ietf.org/rfc/rfc4120.txt"> |
| 57 | * http://www.ietf.org/rfc/rfc4120.txt</a>. |
| 58 | */ |
| 59 | |
| 60 | public class KRBCred { |
| 61 | public Ticket[] tickets = null; |
| 62 | public EncryptedData encPart; |
| 63 | |
| 64 | private int pvno; |
| 65 | private int msgType; |
| 66 | |
| 67 | public KRBCred(Ticket[] new_tickets, EncryptedData new_encPart) throws IOException { |
| 68 | pvno = Krb5.PVNO; |
| 69 | msgType = Krb5.KRB_CRED; |
| 70 | if (new_tickets != null) { |
| 71 | tickets = new Ticket[new_tickets.length]; |
| 72 | for (int i = 0; i < new_tickets.length; i++) { |
| 73 | if (new_tickets[i] == null) { |
| 74 | throw new IOException("Cannot create a KRBCred"); |
| 75 | } else { |
| 76 | tickets[i] = (Ticket)new_tickets[i].clone(); |
| 77 | } |
| 78 | } |
| 79 | } |
| 80 | encPart = new_encPart; |
| 81 | } |
| 82 | |
| 83 | public KRBCred(byte[] data) throws Asn1Exception, |
| 84 | RealmException, KrbApErrException, IOException { |
| 85 | init(new DerValue(data)); |
| 86 | } |
| 87 | |
| 88 | public KRBCred(DerValue encoding) throws Asn1Exception, |
| 89 | RealmException, KrbApErrException, IOException { |
| 90 | init(encoding); |
| 91 | } |
| 92 | |
| 93 | /** |
| 94 | * Initializes an KRBCred object. |
| 95 | * @param encoding a single DER-encoded value. |
| 96 | * @exception Asn1Exception if an error occurs while decoding an ASN1 encoded data. |
| 97 | * @exception IOException if an I/O error occurs while reading encoded data. |
| 98 | * @exception KrbApErrException if the value read from the DER-encoded data |
| 99 | * stream does not match the pre-defined value. |
| 100 | * @exception RealmException if an error occurs while parsing a Realm object. |
| 101 | */ |
| 102 | private void init(DerValue encoding) throws Asn1Exception, |
| 103 | RealmException, KrbApErrException, IOException { |
| 104 | if (((encoding.getTag() & (byte)0x1F) != (byte)0x16) |
| 105 | || (encoding.isApplication() != true) |
| 106 | || (encoding.isConstructed() != true)) |
| 107 | throw new Asn1Exception(Krb5.ASN1_BAD_ID); |
| 108 | DerValue der, subDer; |
| 109 | der = encoding.getData().getDerValue(); |
| 110 | if (der.getTag() != DerValue.tag_Sequence) |
| 111 | throw new Asn1Exception(Krb5.ASN1_BAD_ID); |
| 112 | subDer = der.getData().getDerValue(); |
| 113 | if ((subDer.getTag() & 0x1F) == 0x00) { |
| 114 | pvno = subDer.getData().getBigInteger().intValue(); |
| 115 | if (pvno != Krb5.PVNO) { |
| 116 | throw new KrbApErrException(Krb5.KRB_AP_ERR_BADVERSION); |
| 117 | } |
| 118 | } |
| 119 | else |
| 120 | throw new Asn1Exception(Krb5.ASN1_BAD_ID); |
| 121 | subDer = der.getData().getDerValue(); |
| 122 | if ((subDer.getTag() & 0x1F) == 0x01) { |
| 123 | msgType = subDer.getData().getBigInteger().intValue(); |
| 124 | if (msgType != Krb5.KRB_CRED) |
| 125 | throw new KrbApErrException(Krb5.KRB_AP_ERR_MSG_TYPE); |
| 126 | } |
| 127 | else |
| 128 | throw new Asn1Exception(Krb5.ASN1_BAD_ID); |
| 129 | subDer = der.getData().getDerValue(); |
| 130 | if ((subDer.getTag() & 0x1F) == 0x02) { |
| 131 | DerValue subsubDer = subDer.getData().getDerValue(); |
| 132 | if (subsubDer.getTag() != DerValue.tag_SequenceOf) { |
| 133 | throw new Asn1Exception(Krb5.ASN1_BAD_ID); |
| 134 | } |
| 135 | Vector<Ticket> v = new Vector<Ticket> (); |
| 136 | while (subsubDer.getData().available() > 0) { |
| 137 | v.addElement(new Ticket(subsubDer.getData().getDerValue())); |
| 138 | } |
| 139 | if (v.size() > 0) { |
| 140 | tickets = new Ticket[v.size()]; |
| 141 | v.copyInto(tickets); |
| 142 | } |
| 143 | } |
| 144 | else |
| 145 | throw new Asn1Exception(Krb5.ASN1_BAD_ID); |
| 146 | encPart = EncryptedData.parse(der.getData(), (byte)0x03, false); |
| 147 | |
| 148 | if (der.getData().available() > 0) |
| 149 | throw new Asn1Exception(Krb5.ASN1_BAD_ID); |
| 150 | } |
| 151 | |
| 152 | |
| 153 | /** |
| 154 | * Encodes an KRBCred object. |
| 155 | * @return the data of encoded EncAPRepPart object. |
| 156 | * @exception Asn1Exception if an error occurs while decoding an ASN1 encoded data. |
| 157 | * @exception IOException if an I/O error occurs while reading encoded data. |
| 158 | */ |
| 159 | public byte[] asn1Encode() throws Asn1Exception, IOException { |
| 160 | DerOutputStream temp, bytes, out; |
| 161 | temp = new DerOutputStream(); |
| 162 | temp.putInteger(BigInteger.valueOf(pvno)); |
| 163 | out = new DerOutputStream(); |
| 164 | out.write(DerValue.createTag(DerValue.TAG_CONTEXT, true, (byte)0x00), temp); |
| 165 | temp = new DerOutputStream(); |
| 166 | temp.putInteger(BigInteger.valueOf(msgType)); |
| 167 | out.write(DerValue.createTag(DerValue.TAG_CONTEXT, true, (byte)0x01), temp); |
| 168 | temp = new DerOutputStream(); |
| 169 | for (int i = 0; i < tickets.length; i++) { |
| 170 | temp.write(tickets[i].asn1Encode()); |
| 171 | } |
| 172 | bytes = new DerOutputStream(); |
| 173 | bytes.write(DerValue.tag_SequenceOf, temp); |
| 174 | out.write(DerValue.createTag(DerValue.TAG_CONTEXT, true, (byte)0x02), bytes); |
| 175 | out.write(DerValue.createTag(DerValue.TAG_CONTEXT, true, (byte)0x03), encPart.asn1Encode()); |
| 176 | bytes = new DerOutputStream(); |
| 177 | bytes.write(DerValue.tag_Sequence, out); |
| 178 | out = new DerOutputStream(); |
| 179 | out.write(DerValue.createTag(DerValue.TAG_APPLICATION, true, (byte)0x16), bytes); |
| 180 | return out.toByteArray(); |
| 181 | } |
| 182 | |
| 183 | } |