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.util.*; |
| 34 | import sun.security.krb5.Asn1Exception; |
| 35 | import java.util.Vector; |
| 36 | import java.io.IOException; |
| 37 | |
| 38 | /** |
| 39 | * Implements the ASN.1 LastReq type. |
| 40 | * |
| 41 | * <xmp> |
| 42 | * LastReq ::= SEQUENCE OF SEQUENCE { |
| 43 | * lr-type [0] Int32, |
| 44 | * lr-value [1] KerberosTime |
| 45 | * } |
| 46 | * </xmp> |
| 47 | * |
| 48 | * <p> |
| 49 | * This definition reflects the Network Working Group RFC 4120 |
| 50 | * specification available at |
| 51 | * <a href="http://www.ietf.org/rfc/rfc4120.txt"> |
| 52 | * http://www.ietf.org/rfc/rfc4120.txt</a>. |
| 53 | */ |
| 54 | |
| 55 | public class LastReq { |
| 56 | private LastReqEntry[] entry = null; |
| 57 | |
| 58 | public LastReq(LastReqEntry[] entries) throws IOException { |
| 59 | if (entries != null) { |
| 60 | entry = new LastReqEntry[entries.length]; |
| 61 | for (int i = 0; i < entries.length; i++) { |
| 62 | if (entries[i] == null) { |
| 63 | throw new IOException("Cannot create a LastReqEntry"); |
| 64 | } else { |
| 65 | entry[i] = (LastReqEntry)entries[i].clone(); |
| 66 | } |
| 67 | } |
| 68 | } |
| 69 | |
| 70 | } |
| 71 | |
| 72 | /** |
| 73 | * Constructs a LastReq object. |
| 74 | * @param encoding a Der-encoded data. |
| 75 | * @exception Asn1Exception if an error occurs while decoding an ASN1 encoded data. |
| 76 | * @exception IOException if an I/O error occurs while reading encoded data. |
| 77 | */ |
| 78 | |
| 79 | public LastReq(DerValue encoding) throws Asn1Exception, IOException { |
| 80 | Vector<LastReqEntry> v= new Vector<LastReqEntry> (); |
| 81 | if (encoding.getTag() != DerValue.tag_Sequence) { |
| 82 | throw new Asn1Exception(Krb5.ASN1_BAD_ID); |
| 83 | } |
| 84 | while (encoding.getData().available() > 0) { |
| 85 | v.addElement(new LastReqEntry(encoding.getData().getDerValue())); |
| 86 | } |
| 87 | if (v.size() > 0) { |
| 88 | entry = new LastReqEntry[v.size()]; |
| 89 | v.copyInto(entry); |
| 90 | } |
| 91 | } |
| 92 | |
| 93 | /** |
| 94 | * Encodes an LastReq object. |
| 95 | * @return the byte array of encoded LastReq object. |
| 96 | * @exception Asn1Exception if an error occurs while decoding an ASN1 encoded data. |
| 97 | * @exception IOException if an I/O error occurs while reading encoded data. |
| 98 | */ |
| 99 | public byte[] asn1Encode() throws Asn1Exception, IOException { |
| 100 | DerOutputStream bytes = new DerOutputStream(); |
| 101 | if (entry != null && entry.length > 0) { |
| 102 | DerOutputStream temp = new DerOutputStream(); |
| 103 | for (int i = 0; i < entry.length; i++) |
| 104 | temp.write(entry[i].asn1Encode()); |
| 105 | bytes.write(DerValue.tag_Sequence, temp); |
| 106 | return bytes.toByteArray(); |
| 107 | } |
| 108 | return null; |
| 109 | } |
| 110 | |
| 111 | /** |
| 112 | * Parse (unmarshal) a last request from a DER input stream. This form |
| 113 | * parsing might be used when expanding a value which is part of |
| 114 | * a constructed sequence and uses explicitly tagged type. |
| 115 | * |
| 116 | * @exception Asn1Exception on error. |
| 117 | * @param data the Der input stream value, which contains one or more marshaled value. |
| 118 | * @param explicitTag tag number. |
| 119 | * @param optional indicates if this data field is optional |
| 120 | * @return an instance of LastReq. |
| 121 | * |
| 122 | */ |
| 123 | |
| 124 | public static LastReq parse(DerInputStream data, byte explicitTag, boolean optional) throws Asn1Exception, IOException { |
| 125 | if ((optional) && (((byte)data.peekByte() & (byte)0x1F) != explicitTag)) |
| 126 | return null; |
| 127 | DerValue der = data.getDerValue(); |
| 128 | if (explicitTag != (der.getTag() & (byte)0x1F)) { |
| 129 | throw new Asn1Exception(Krb5.ASN1_BAD_ID); |
| 130 | } |
| 131 | else { |
| 132 | DerValue subDer = der.getData().getDerValue(); |
| 133 | return new LastReq(subDer); |
| 134 | } |
| 135 | } |
| 136 | |
| 137 | } |