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
31 package sun.security.krb5.internal;
32
33 import sun.security.krb5.*;
34 import sun.security.util.*;
35 import java.util.Vector;
36 import java.io.IOException;
37 import java.math.BigInteger;
38
39 /**
40 * Implements the ASN.1 EncAPRepPart type.
41 *
42 * <xmp>
43 * EncAPRepPart ::= [APPLICATION 27] SEQUENCE {
44 * ctime [0] KerberosTime,
45 * cusec [1] Microseconds,
46 * subkey [2] EncryptionKey OPTIONAL,
47 * seq-number [3] UInt32 OPTIONAL
48 * }
49 * </xmp>
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 public class EncAPRepPart {
58
59 public KerberosTime ctime;
60 public int cusec;
61 EncryptionKey subKey; //optional
62 Integer seqNumber; //optional
63
64 public EncAPRepPart(
65 KerberosTime new_ctime,
66 int new_cusec,
67 EncryptionKey new_subKey,
68 Integer new_seqNumber) {
69 ctime = new_ctime;
70 cusec = new_cusec;
71 subKey = new_subKey;
72 seqNumber = new_seqNumber;
73 }
74
75 public EncAPRepPart(byte[] data)
76 throws Asn1Exception, IOException {
77 init(new DerValue(data));
78 }
79
80 public EncAPRepPart(DerValue encoding)
81 throws Asn1Exception, IOException {
82 init(encoding);
83 }
84
85 /**
86 * Initializes an EncaPRepPart object.
87 * @param encoding a single DER-encoded value.
88 * @exception Asn1Exception if an error occurs while decoding an ASN1 encoded data.
89 * @exception IOException if an I/O error occurs while reading encoded data.
90 */
91 private void init(DerValue encoding) throws Asn1Exception, IOException {
92 DerValue der, subDer;
93 if (((encoding.getTag() & (byte) 0x1F) != (byte) 0x1B)
94 || (encoding.isApplication() != true)
95 || (encoding.isConstructed() != true)) {
96 throw new Asn1Exception(Krb5.ASN1_BAD_ID);
97 }
98 der = encoding.getData().getDerValue();
99 if (der.getTag() != DerValue.tag_Sequence) {
100 throw new Asn1Exception(Krb5.ASN1_BAD_ID);
101 }
102 ctime = KerberosTime.parse(der.getData(), (byte) 0x00, true);
103 subDer = der.getData().getDerValue();
104 if ((subDer.getTag() & (byte) 0x1F) == (byte) 0x01) {
105 cusec = subDer.getData().getBigInteger().intValue();
106 } else {
107 throw new Asn1Exception(Krb5.ASN1_BAD_ID);
108 }
109 if (der.getData().available() > 0) {
110 subKey = EncryptionKey.parse(der.getData(), (byte) 0x02, true);
111 } else {
112 subKey = null;
113 seqNumber = null;
114 }
115 if (der.getData().available() > 0) {
116 subDer = der.getData().getDerValue();
117 if ((subDer.getTag() & 0x1F) != 0x03) {
118 throw new Asn1Exception(Krb5.ASN1_BAD_ID);
119 }
120 seqNumber = subDer.getData().getBigInteger().intValue();
121 } else {
122 seqNumber = null;
123 }
124 if (der.getData().available() > 0) {
125 throw new Asn1Exception(Krb5.ASN1_BAD_ID);
126 }
127 }
128
129 /**
130 * Encodes an EncAPRepPart object.
131 * @return byte array of encoded EncAPRepPart object.
132 * @exception Asn1Exception if an error occurs while decoding an ASN1 encoded data.
133 * @exception IOException if an I/O error occurs while reading encoded data.
134 */
135 public byte[] asn1Encode() throws Asn1Exception, IOException {
136 Vector<DerValue> v = new Vector<>();
137 DerOutputStream temp = new DerOutputStream();
138 v.addElement(new DerValue(DerValue.createTag(DerValue.TAG_CONTEXT,
139 true, (byte) 0x00), ctime.asn1Encode()));
140 temp.putInteger(BigInteger.valueOf(cusec));
141 v.addElement(new DerValue(DerValue.createTag(DerValue.TAG_CONTEXT,
142 true, (byte) 0x01), temp.toByteArray()));
143 if (subKey != null) {
144 v.addElement(new DerValue(DerValue.createTag(DerValue.TAG_CONTEXT,
145 true, (byte) 0x02), subKey.asn1Encode()));
146 }
147 if (seqNumber != null) {
148 temp = new DerOutputStream();
149 // encode as an unsigned integer (UInt32)
150 temp.putInteger(BigInteger.valueOf(seqNumber.longValue()));
151 v.addElement(new DerValue(DerValue.createTag(DerValue.TAG_CONTEXT,
152 true, (byte) 0x03), temp.toByteArray()));
153 }
154 DerValue[] der = new DerValue[v.size()];
155 v.copyInto(der);
156 temp = new DerOutputStream();
157 temp.putSequence(der);
158 DerOutputStream out = new DerOutputStream();
159 out.write(DerValue.createTag(DerValue.TAG_APPLICATION,
160 true, (byte) 0x1B), temp);
161 return out.toByteArray();
162 }
163
164 public final EncryptionKey getSubKey() {
165 return subKey;
166 }
167
168 public final Integer getSeqNumber() {
169 return seqNumber;
170 }
171 }