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