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. Oracle designates this 7 * particular file as subject to the "Classpath" exception as provided 8 * by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 21 * or visit www.oracle.com if you need additional information or have any 22 * 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 31package sun.security.krb5.internal; 32 33import sun.security.krb5.*; 34import sun.security.util.*; 35import java.io.IOException; 36import java.math.BigInteger; 37 38/** 39 * Implements the ASN.1 AP-REQ type. 40 * 41 * <pre>{@code 42 * AP-REQ ::= [APPLICATION 14] SEQUENCE { 43 * pvno [0] INTEGER (5), 44 * msg-type [1] INTEGER (14), 45 * ap-options [2] APOptions, 46 * ticket [3] Ticket, 47 * authenticator [4] EncryptedData -- Authenticator 48 * } 49 * }</pre> 50 * 51 * <p> 52 * This definition reflects the Network Working Group RFC 4120 53 * specification available at 54 * <a href="http://www.ietf.org/rfc/rfc4120.txt"> 55 * http://www.ietf.org/rfc/rfc4120.txt</a>. 56 */ 57public class APReq { 58 59 public int pvno; 60 public int msgType; 61 public APOptions apOptions; 62 public Ticket ticket; 63 public EncryptedData authenticator; 64 65 public APReq( 66 APOptions new_apOptions, 67 Ticket new_ticket, 68 EncryptedData new_authenticator) { 69 pvno = Krb5.PVNO; 70 msgType = Krb5.KRB_AP_REQ; 71 apOptions = new_apOptions; 72 ticket = new_ticket; 73 authenticator = new_authenticator; 74 } 75 76 public APReq(byte[] data) throws Asn1Exception, IOException, KrbApErrException, RealmException { 77 init(new DerValue(data)); 78 } 79 80 public APReq(DerValue encoding) throws Asn1Exception, IOException, KrbApErrException, RealmException { 81 init(encoding); 82 } 83 84 /** 85 * Initializes an APReq object. 86 * @param encoding a single DER-encoded value. 87 * @exception Asn1Exception if an error occurs while decoding an ASN1 encoded data. 88 * @exception IOException if an I/O error occurs while reading encoded data. 89 * @exception KrbApErrException if the value read from the DER-encoded data stream does not match the pre-defined value. 90 * @exception RealmException if an error occurs while parsing a Realm object. 91 */ 92 private void init(DerValue encoding) throws Asn1Exception, 93 IOException, KrbApErrException, RealmException { 94 DerValue der, subDer; 95 if (((encoding.getTag() & (byte) 0x1F) != Krb5.KRB_AP_REQ) 96 || (encoding.isApplication() != true) 97 || (encoding.isConstructed() != true)) { 98 throw new Asn1Exception(Krb5.ASN1_BAD_ID); 99 } 100 der = encoding.getData().getDerValue(); 101 if (der.getTag() != DerValue.tag_Sequence) { 102 throw new Asn1Exception(Krb5.ASN1_BAD_ID); 103 } 104 subDer = der.getData().getDerValue(); 105 if ((subDer.getTag() & (byte) 0x1F) != (byte) 0x00) { 106 throw new Asn1Exception(Krb5.ASN1_BAD_ID); 107 } 108 pvno = subDer.getData().getBigInteger().intValue(); 109 if (pvno != Krb5.PVNO) { 110 throw new KrbApErrException(Krb5.KRB_AP_ERR_BADVERSION); 111 } 112 subDer = der.getData().getDerValue(); 113 if ((subDer.getTag() & (byte) 0x1F) != (byte) 0x01) { 114 throw new Asn1Exception(Krb5.ASN1_BAD_ID); 115 } 116 msgType = subDer.getData().getBigInteger().intValue(); 117 if (msgType != Krb5.KRB_AP_REQ) { 118 throw new KrbApErrException(Krb5.KRB_AP_ERR_MSG_TYPE); 119 } 120 apOptions = APOptions.parse(der.getData(), (byte) 0x02, false); 121 ticket = Ticket.parse(der.getData(), (byte) 0x03, false); 122 authenticator = EncryptedData.parse(der.getData(), (byte) 0x04, false); 123 if (der.getData().available() > 0) { 124 throw new Asn1Exception(Krb5.ASN1_BAD_ID); 125 } 126 } 127 128 /** 129 * Encodes an APReq object. 130 * @return byte array of encoded APReq object. 131 * @exception Asn1Exception if an error occurs while decoding an ASN1 encoded data. 132 * @exception IOException if an I/O error occurs while reading encoded data. 133 */ 134 public byte[] asn1Encode() throws Asn1Exception, IOException { 135 DerOutputStream bytes = new DerOutputStream(); 136 DerOutputStream temp = new DerOutputStream(); 137 temp.putInteger(BigInteger.valueOf(pvno)); 138 bytes.write(DerValue.createTag(DerValue.TAG_CONTEXT, true, (byte) 0x00), temp); 139 temp = new DerOutputStream(); 140 temp.putInteger(BigInteger.valueOf(msgType)); 141 bytes.write(DerValue.createTag(DerValue.TAG_CONTEXT, true, (byte) 0x01), temp); 142 bytes.write(DerValue.createTag(DerValue.TAG_CONTEXT, true, (byte) 0x02), apOptions.asn1Encode()); 143 bytes.write(DerValue.createTag(DerValue.TAG_CONTEXT, true, (byte) 0x03), ticket.asn1Encode()); 144 bytes.write(DerValue.createTag(DerValue.TAG_CONTEXT, true, (byte) 0x04), authenticator.asn1Encode()); 145 temp = new DerOutputStream(); 146 temp.write(DerValue.tag_Sequence, bytes); 147 DerOutputStream apreq = new DerOutputStream(); 148 apreq.write(DerValue.createTag(DerValue.TAG_APPLICATION, true, (byte) 0x0E), temp); 149 return apreq.toByteArray(); 150 } 151} 152