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.PrincipalName; |
| 34 | import sun.security.krb5.EncryptedData; |
| 35 | import sun.security.krb5.Asn1Exception; |
| 36 | import sun.security.krb5.Realm; |
| 37 | import sun.security.krb5.RealmException; |
| 38 | import sun.security.util.*; |
| 39 | import java.io.IOException; |
| 40 | import java.math.BigInteger; |
| 41 | |
| 42 | /** |
| 43 | * Implements the ASN.1 Ticket type. |
| 44 | * |
| 45 | * <xmp> |
| 46 | * Ticket ::= [APPLICATION 1] SEQUENCE { |
| 47 | * tkt-vno [0] INTEGER (5), |
| 48 | * realm [1] Realm, |
| 49 | * sname [2] PrincipalName, |
| 50 | * enc-part [3] EncryptedData -- EncTicketPart |
| 51 | * } |
| 52 | * </xmp> |
| 53 | * |
| 54 | * <p> |
| 55 | * This definition reflects the Network Working Group RFC 4120 |
| 56 | * specification available at |
| 57 | * <a href="http://www.ietf.org/rfc/rfc4120.txt"> |
| 58 | * http://www.ietf.org/rfc/rfc4120.txt</a>. |
| 59 | */ |
| 60 | |
| 61 | public class Ticket implements Cloneable { |
| 62 | public int tkt_vno; |
| 63 | public Realm realm; |
| 64 | public PrincipalName sname; |
| 65 | public EncryptedData encPart; |
| 66 | |
| 67 | private Ticket() { |
| 68 | } |
| 69 | |
| 70 | public Object clone() { |
| 71 | Ticket new_ticket = new Ticket(); |
| 72 | new_ticket.realm = (Realm)realm.clone(); |
| 73 | new_ticket.sname = (PrincipalName)sname.clone(); |
| 74 | new_ticket.encPart = (EncryptedData)encPart.clone(); |
| 75 | new_ticket.tkt_vno = tkt_vno; |
| 76 | return new_ticket; |
| 77 | } |
| 78 | |
| 79 | public Ticket( |
| 80 | Realm new_realm, |
| 81 | PrincipalName new_sname, |
| 82 | EncryptedData new_encPart |
| 83 | ) { |
| 84 | tkt_vno = Krb5.TICKET_VNO; |
| 85 | realm = new_realm; |
| 86 | sname = new_sname; |
| 87 | encPart = new_encPart; |
| 88 | } |
| 89 | |
| 90 | public Ticket(byte[] data) throws Asn1Exception, |
| 91 | RealmException, KrbApErrException, IOException { |
| 92 | init(new DerValue(data)); |
| 93 | } |
| 94 | |
| 95 | public Ticket(DerValue encoding) throws Asn1Exception, |
| 96 | RealmException, KrbApErrException, IOException { |
| 97 | init(encoding); |
| 98 | } |
| 99 | |
| 100 | /** |
| 101 | * Initializes a Ticket object. |
| 102 | * @param encoding a single DER-encoded value. |
| 103 | * @exception Asn1Exception if an error occurs while decoding an ASN1 encoded data. |
| 104 | * @exception IOException if an I/O error occurs while reading encoded data. |
| 105 | * @exception KrbApErrException if the value read from the DER-encoded data stream does not match the pre-defined value. |
| 106 | * @exception RealmException if an error occurs while parsing a Realm object. |
| 107 | */ |
| 108 | |
| 109 | private void init(DerValue encoding) throws Asn1Exception, |
| 110 | RealmException, KrbApErrException, IOException { |
| 111 | DerValue der; |
| 112 | DerValue subDer; |
| 113 | if (((encoding.getTag() & (byte)0x1F) != Krb5.KRB_TKT) |
| 114 | || (encoding.isApplication() != true) |
| 115 | || (encoding.isConstructed() != true)) |
| 116 | throw new Asn1Exception(Krb5.ASN1_BAD_ID); |
| 117 | der = encoding.getData().getDerValue(); |
| 118 | if (der.getTag() != DerValue.tag_Sequence) |
| 119 | throw new Asn1Exception(Krb5.ASN1_BAD_ID); |
| 120 | subDer = der.getData().getDerValue(); |
| 121 | if ((subDer.getTag() & (byte)0x1F) != (byte)0x00) |
| 122 | throw new Asn1Exception(Krb5.ASN1_BAD_ID); |
| 123 | tkt_vno = subDer.getData().getBigInteger().intValue(); |
| 124 | if (tkt_vno != Krb5.TICKET_VNO) |
| 125 | throw new KrbApErrException(Krb5.KRB_AP_ERR_BADVERSION); |
| 126 | realm = Realm.parse(der.getData(), (byte)0x01, false); |
| 127 | sname = PrincipalName.parse(der.getData(), (byte)0x02, false); |
| 128 | encPart = EncryptedData.parse(der.getData(), (byte)0x03, false); |
| 129 | if (der.getData().available() > 0) |
| 130 | throw new Asn1Exception(Krb5.ASN1_BAD_ID); |
| 131 | } |
| 132 | |
| 133 | /** |
| 134 | * Encodes a Ticket object. |
| 135 | * @return byte array of encoded ticket object. |
| 136 | * @exception Asn1Exception if an error occurs while decoding an ASN1 encoded data. |
| 137 | * @exception IOException if an I/O error occurs while reading encoded data. |
| 138 | */ |
| 139 | public byte[] asn1Encode() throws Asn1Exception, IOException { |
| 140 | DerOutputStream bytes = new DerOutputStream(); |
| 141 | DerOutputStream temp = new DerOutputStream(); |
| 142 | DerValue der[] = new DerValue[4]; |
| 143 | temp.putInteger(BigInteger.valueOf(tkt_vno)); |
| 144 | bytes.write(DerValue.createTag(DerValue.TAG_CONTEXT, true, (byte)0x00), temp); |
| 145 | bytes.write(DerValue.createTag(DerValue.TAG_CONTEXT, true, (byte)0x01), realm.asn1Encode()); |
| 146 | bytes.write(DerValue.createTag(DerValue.TAG_CONTEXT, true, (byte)0x02), sname.asn1Encode()); |
| 147 | bytes.write(DerValue.createTag(DerValue.TAG_CONTEXT, true, (byte)0x03), encPart.asn1Encode()); |
| 148 | temp = new DerOutputStream(); |
| 149 | temp.write(DerValue.tag_Sequence, bytes); |
| 150 | DerOutputStream ticket = new DerOutputStream(); |
| 151 | ticket.write(DerValue.createTag(DerValue.TAG_APPLICATION, true, (byte)0x01), temp); |
| 152 | return ticket.toByteArray(); |
| 153 | } |
| 154 | |
| 155 | /** |
| 156 | * Parse (unmarshal) a Ticket from a DER input stream. This form |
| 157 | * parsing might be used when expanding a value which is part of |
| 158 | * a constructed sequence and uses explicitly tagged type. |
| 159 | * |
| 160 | * @exception Asn1Exception on error. |
| 161 | * @param data the Der input stream value, which contains one or more marshaled value. |
| 162 | * @param explicitTag tag number. |
| 163 | * @param optional indicate if this data field is optional |
| 164 | * @return an instance of Ticket. |
| 165 | */ |
| 166 | public static Ticket parse(DerInputStream data, byte explicitTag, boolean optional) throws Asn1Exception, IOException, RealmException, KrbApErrException { |
| 167 | if ((optional) && (((byte)data.peekByte() & (byte)0x1F)!= explicitTag)) |
| 168 | return null; |
| 169 | DerValue der = data.getDerValue(); |
| 170 | if (explicitTag != (der.getTag() & (byte)0x1F)) { |
| 171 | throw new Asn1Exception(Krb5.ASN1_BAD_ID); |
| 172 | } |
| 173 | else { |
| 174 | DerValue subDer = der.getData().getDerValue(); |
| 175 | return new Ticket(subDer); |
| 176 | } |
| 177 | } |
| 178 | |
| 179 | |
| 180 | } |