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.*; |
| 34 | import java.util.Vector; |
| 35 | import sun.security.util.*; |
| 36 | import java.io.IOException; |
| 37 | import java.math.BigInteger; |
| 38 | |
| 39 | /** |
| 40 | * Implements the ASN.1 KRB_KDC_REQ type. |
| 41 | * |
| 42 | * <xmp> |
| 43 | * KDC-REQ ::= SEQUENCE { |
| 44 | * -- NOTE: first tag is [1], not [0] |
| 45 | * pvno [1] INTEGER (5) , |
| 46 | * msg-type [2] INTEGER (10 -- AS -- | 12 -- TGS --), |
| 47 | * padata [3] SEQUENCE OF PA-DATA OPTIONAL |
| 48 | * -- NOTE: not empty --, |
| 49 | * req-body [4] KDC-REQ-BODY |
| 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 KDCReq { |
| 61 | public KDCReqBody reqBody; |
| 62 | |
| 63 | private int pvno; |
| 64 | private int msgType; |
| 65 | private PAData[] pAData = null; //optional |
| 66 | |
| 67 | public KDCReq(PAData[] new_pAData, KDCReqBody new_reqBody, |
| 68 | int req_type) throws IOException { |
| 69 | pvno = Krb5.PVNO; |
| 70 | msgType = req_type; |
| 71 | if (new_pAData != null) { |
| 72 | pAData = new PAData[new_pAData.length]; |
| 73 | for (int i = 0; i < new_pAData.length; i++) { |
| 74 | if (new_pAData[i] == null) { |
| 75 | throw new IOException("Cannot create a KDCRep"); |
| 76 | } else { |
| 77 | pAData[i] = (PAData)new_pAData[i].clone(); |
| 78 | } |
| 79 | } |
| 80 | } |
| 81 | reqBody = new_reqBody; |
| 82 | } |
| 83 | |
| 84 | public KDCReq() { |
| 85 | } |
| 86 | |
| 87 | public KDCReq(byte[] data, int req_type) throws Asn1Exception, |
| 88 | IOException, KrbException { |
| 89 | init(new DerValue(data), req_type); |
| 90 | } |
| 91 | |
| 92 | /** |
| 93 | * Creates an KDCReq object from a DerValue object and asn1 type. |
| 94 | * |
| 95 | * @param der a DER value of an KDCReq object. |
| 96 | * @param req_type a encoded asn1 type value. |
| 97 | * @exception Asn1Exception if an error occurs while decoding an ASN1 encoded data. |
| 98 | * @exception IOException if an I/O error occurs while reading encoded data. |
| 99 | * @exceptoin KrbErrException |
| 100 | */ |
| 101 | public KDCReq(DerValue der, int req_type) throws Asn1Exception, |
| 102 | IOException, KrbException { |
| 103 | init(der, req_type); |
| 104 | } |
| 105 | |
| 106 | /** |
| 107 | * Initializes a KDCReq object from a DerValue. The DER encoding |
| 108 | * must be in the format specified by the KRB_KDC_REQ ASN.1 notation. |
| 109 | * |
| 110 | * @param encoding a DER-encoded KDCReq object. |
| 111 | * @param req_type an int indicating whether it's KRB_AS_REQ or KRB_TGS_REQ type |
| 112 | * @exception Asn1Exception if an error occurs while decoding an ASN1 encoded data. |
| 113 | * @exception IOException if an I/O error occurs while reading encoded data. |
| 114 | * @exception KrbException if an error occurs while constructing a Realm object, |
| 115 | * or a Krb object from DER-encoded data. |
| 116 | */ |
| 117 | protected void init(DerValue encoding, int req_type) throws Asn1Exception, |
| 118 | IOException, KrbException { |
| 119 | DerValue der, subDer; |
| 120 | BigInteger bint; |
| 121 | if ((encoding.getTag() & 0x1F) != req_type) { |
| 122 | throw new Asn1Exception(Krb5.ASN1_BAD_ID); |
| 123 | } |
| 124 | der = encoding.getData().getDerValue(); |
| 125 | if (der.getTag() != DerValue.tag_Sequence) { |
| 126 | throw new Asn1Exception(Krb5.ASN1_BAD_ID); |
| 127 | } |
| 128 | subDer = der.getData().getDerValue(); |
| 129 | if ((subDer.getTag() & 0x01F) == 0x01) { |
| 130 | bint = subDer.getData().getBigInteger(); |
| 131 | this.pvno = bint.intValue(); |
| 132 | if (this.pvno != Krb5.PVNO) |
| 133 | throw new KrbApErrException(Krb5.KRB_AP_ERR_BADVERSION); |
| 134 | } |
| 135 | else |
| 136 | throw new Asn1Exception(Krb5.ASN1_BAD_ID); |
| 137 | subDer = der.getData().getDerValue(); |
| 138 | if ((subDer.getTag() & 0x01F) == 0x02) { |
| 139 | bint = subDer.getData().getBigInteger(); |
| 140 | this.msgType = bint.intValue(); |
| 141 | if (this.msgType != req_type) |
| 142 | throw new KrbApErrException(Krb5.KRB_AP_ERR_MSG_TYPE); |
| 143 | } |
| 144 | else |
| 145 | throw new Asn1Exception(Krb5.ASN1_BAD_ID); |
| 146 | subDer = der.getData().getDerValue(); |
| 147 | if ((subDer.getTag() & 0x01F) == 0x03) { |
| 148 | DerValue subsubDer = subDer.getData().getDerValue(); |
| 149 | if (subsubDer.getTag() != DerValue.tag_SequenceOf) { |
| 150 | throw new Asn1Exception(Krb5.ASN1_BAD_ID); |
| 151 | } |
| 152 | Vector<PAData> v = new Vector<PAData> (); |
| 153 | while (subsubDer.getData().available() > 0) { |
| 154 | v.addElement(new PAData(subsubDer.getData().getDerValue())); |
| 155 | } |
| 156 | if (v.size() > 0) { |
| 157 | pAData = new PAData[v.size()]; |
| 158 | v.copyInto(pAData); |
| 159 | } |
| 160 | } |
| 161 | else pAData = null; |
| 162 | subDer = der.getData().getDerValue(); |
| 163 | if ((subDer.getTag() & 0x01F) == 0x04) { |
| 164 | DerValue subsubDer = subDer.getData().getDerValue(); |
| 165 | reqBody = new KDCReqBody(subsubDer, msgType); |
| 166 | } |
| 167 | else |
| 168 | throw new Asn1Exception(Krb5.ASN1_BAD_ID); |
| 169 | } |
| 170 | |
| 171 | /** |
| 172 | * Encodes this object to a byte array. |
| 173 | * |
| 174 | * @return an byte array of encoded data. |
| 175 | * @exception Asn1Exception if an error occurs while decoding an ASN1 encoded data. |
| 176 | * @exception IOException if an I/O error occurs while reading encoded data. |
| 177 | * |
| 178 | */ |
| 179 | public byte[] asn1Encode() throws Asn1Exception, IOException { |
| 180 | DerOutputStream temp, bytes, out; |
| 181 | temp = new DerOutputStream(); |
| 182 | temp.putInteger(BigInteger.valueOf(pvno)); |
| 183 | out = new DerOutputStream(); |
| 184 | out.write(DerValue.createTag(DerValue.TAG_CONTEXT, true, (byte)0x01), temp); |
| 185 | temp = new DerOutputStream(); |
| 186 | temp.putInteger(BigInteger.valueOf(msgType)); |
| 187 | out.write(DerValue.createTag(DerValue.TAG_CONTEXT, true, (byte)0x02), temp); |
| 188 | if (pAData != null && pAData.length > 0) { |
| 189 | temp = new DerOutputStream(); |
| 190 | for (int i = 0; i < pAData.length; i++) { |
| 191 | temp.write(pAData[i].asn1Encode()); |
| 192 | } |
| 193 | bytes = new DerOutputStream(); |
| 194 | bytes.write(DerValue.tag_SequenceOf, temp); |
| 195 | out.write(DerValue.createTag(DerValue.TAG_CONTEXT, true, (byte)0x03), bytes); |
| 196 | } |
| 197 | out.write(DerValue.createTag(DerValue.TAG_CONTEXT, true, (byte)0x04), reqBody.asn1Encode(msgType)); |
| 198 | bytes = new DerOutputStream(); |
| 199 | bytes.write(DerValue.tag_Sequence, out); |
| 200 | out = new DerOutputStream(); |
| 201 | out.write(DerValue.createTag(DerValue.TAG_APPLICATION, true, (byte)msgType), bytes); |
| 202 | return out.toByteArray(); |
| 203 | } |
| 204 | |
| 205 | public byte[] asn1EncodeReqBody() throws Asn1Exception, IOException |
| 206 | { |
| 207 | return reqBody.asn1Encode(msgType); |
| 208 | } |
| 209 | |
| 210 | } |