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.EncryptedData; 34import sun.security.krb5.Asn1Exception; 35import sun.security.util.*; 36import java.io.IOException; 37import java.math.BigInteger; 38 39/** 40 * Implements the ASN.1 KRB-PRIV type. 41 * 42 * <pre>{@code 43 * KRB-PRIV ::= [APPLICATION 21] SEQUENCE { 44 * pvno [0] INTEGER (5), 45 * msg-type [1] INTEGER (21), 46 * -- NOTE: there is no [2] tag 47 * enc-part [3] EncryptedData -- EncKrbPrivPart 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 */ 57 58public class KRBPriv { 59 public int pvno; 60 public int msgType; 61 public EncryptedData encPart; 62 63 public KRBPriv(EncryptedData new_encPart) { 64 pvno = Krb5.PVNO; 65 msgType = Krb5.KRB_PRIV; 66 encPart = new_encPart; 67 } 68 69 public KRBPriv(byte[] data) throws Asn1Exception, 70 KrbApErrException, IOException { 71 init(new DerValue(data)); 72 } 73 74 public KRBPriv(DerValue encoding) throws Asn1Exception, 75 KrbApErrException, IOException { 76 init(encoding); 77 } 78 79 80 /** 81 * Initializes an KRBPriv object. 82 * @param encoding a single DER-encoded value. 83 * @exception Asn1Exception if an error occurs while decoding an ASN1 encoded data. 84 * @exception IOException if an I/O error occurs while reading encoded data. 85 * @exception KrbApErrException if the value read from the DER-encoded data 86 * stream does not match the pre-defined value. 87 */ 88 private void init(DerValue encoding) throws Asn1Exception, 89 KrbApErrException, IOException { 90 DerValue der, subDer; 91 if (((encoding.getTag() & (byte)0x1F) != (byte)0x15) 92 || (encoding.isApplication() != true) 93 || (encoding.isConstructed() != true)) 94 throw new Asn1Exception(Krb5.ASN1_BAD_ID); 95 der = encoding.getData().getDerValue(); 96 if (der.getTag() != DerValue.tag_Sequence) 97 throw new Asn1Exception(Krb5.ASN1_BAD_ID); 98 subDer = der.getData().getDerValue(); 99 if ((subDer.getTag() & 0x1F) == 0x00) { 100 pvno = subDer.getData().getBigInteger().intValue(); 101 if (pvno != Krb5.PVNO) { 102 throw new KrbApErrException(Krb5.KRB_AP_ERR_BADVERSION); 103 } 104 } 105 else 106 throw new Asn1Exception(Krb5.ASN1_BAD_ID); 107 subDer = der.getData().getDerValue(); 108 if ((subDer.getTag() & 0x1F) == 0x01) { 109 msgType = subDer.getData().getBigInteger().intValue(); 110 if (msgType != Krb5.KRB_PRIV) 111 throw new KrbApErrException(Krb5.KRB_AP_ERR_MSG_TYPE); 112 } 113 else 114 throw new Asn1Exception(Krb5.ASN1_BAD_ID); 115 encPart = EncryptedData.parse(der.getData(), (byte)0x03, false); 116 if (der.getData().available() >0) 117 throw new Asn1Exception(Krb5.ASN1_BAD_ID); 118 } 119 120 /** 121 * Encodes an KRBPriv object. 122 * @return byte array of encoded EncAPRepPart object. 123 * @exception Asn1Exception if an error occurs while decoding an ASN1 encoded data. 124 * @exception IOException if an I/O error occurs while reading encoded data. 125 */ 126 public byte[] asn1Encode() throws Asn1Exception, IOException { 127 DerOutputStream temp, bytes; 128 temp = new DerOutputStream(); 129 temp.putInteger(BigInteger.valueOf(pvno)); 130 bytes = new DerOutputStream(); 131 bytes.write(DerValue.createTag(DerValue.TAG_CONTEXT, true, (byte)0x00), temp); 132 temp = new DerOutputStream(); 133 temp.putInteger(BigInteger.valueOf(msgType)); 134 bytes.write(DerValue.createTag(DerValue.TAG_CONTEXT, true, (byte)0x01), temp); 135 bytes.write(DerValue.createTag(DerValue.TAG_CONTEXT, true, (byte)0x03), encPart.asn1Encode()); 136 temp = new DerOutputStream(); 137 temp.write(DerValue.tag_Sequence, bytes); 138 bytes = new DerOutputStream(); 139 bytes.write(DerValue.createTag(DerValue.TAG_APPLICATION, true, (byte)0x15), temp); 140 return bytes.toByteArray(); 141 } 142 143} 144