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| 1 | /* | ||
| 2 | * Copyright (c) 2003, Oracle and/or its affiliates. All rights reserved. | ||
| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | ||
| 4 | * | ||
| 5 | * This code is free software; you can redistribute it and/or modify it | ||
| 6 | * under the terms of the GNU General Public License version 2 only, as | ||
| 7 | * published by the Free Software Foundation. Oracle designates this | ||
| 8 | * particular file as subject to the "Classpath" exception as provided | ||
| 9 | * by Oracle in the LICENSE file that accompanied this code. | ||
| 10 | * | ||
| 11 | * This code is distributed in the hope that it will be useful, but WITHOUT | ||
| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | ||
| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | ||
| 14 | * version 2 for more details (a copy is included in the LICENSE file that | ||
| 15 | * accompanied this code). | ||
| 16 | * | ||
| 17 | * You should have received a copy of the GNU General Public License version | ||
| 18 | * 2 along with this work; if not, write to the Free Software Foundation, | ||
| 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | ||
| 20 | * | ||
| 21 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | ||
| 22 | * or visit www.oracle.com if you need additional information or have any | ||
| 23 | * questions. | ||
| 24 | */ | ||
| 25 | |||
| 26 | package sun.security.timestamp; | ||
| 27 | |||
| 28 | import java.io.IOException; | ||
| 29 | import java.math.BigInteger; | ||
| 30 | import java.util.Date; | ||
| 31 | import sun.security.util.DerValue; | ||
| 32 | import sun.security.util.ObjectIdentifier; | ||
| 33 | import sun.security.x509.AlgorithmId; | ||
| 34 | |||
| 35 | /** | ||
| 36 | * This class provides the timestamp token info resulting from a successful | ||
| 37 | * timestamp request, as defined in | ||
| 38 | * <a href="http://www.ietf.org/rfc/rfc3161.txt">RFC 3161</a>. | ||
| 39 | * | ||
| 40 | * The timestampTokenInfo ASN.1 type has the following definition: | ||
| 41 | * <pre> | ||
| 42 | * | ||
| 43 | * TSTInfo ::= SEQUENCE { | ||
| 44 | * version INTEGER { v1(1) }, | ||
| 45 | * policy TSAPolicyId, | ||
| 46 | * messageImprint MessageImprint, | ||
| 47 | * -- MUST have the same value as the similar field in | ||
| 48 | * -- TimeStampReq | ||
| 49 | * serialNumber INTEGER, | ||
| 50 | * -- Time-Stamping users MUST be ready to accommodate integers | ||
| 51 | * -- up to 160 bits. | ||
| 52 | * genTime GeneralizedTime, | ||
| 53 | * accuracy Accuracy OPTIONAL, | ||
| 54 | * ordering BOOLEAN DEFAULT FALSE, | ||
| 55 | * nonce INTEGER OPTIONAL, | ||
| 56 | * -- MUST be present if the similar field was present | ||
| 57 | * -- in TimeStampReq. In that case it MUST have the same value. | ||
| 58 | * tsa [0] GeneralName OPTIONAL, | ||
| 59 | * extensions [1] IMPLICIT Extensions OPTIONAL } | ||
| 60 | * | ||
| 61 | * Accuracy ::= SEQUENCE { | ||
| 62 | * seconds INTEGER OPTIONAL, | ||
| 63 | * millis [0] INTEGER (1..999) OPTIONAL, | ||
| 64 | * micros [1] INTEGER (1..999) OPTIONAL } | ||
| 65 | * | ||
| 66 | * </pre> | ||
| 67 | * | ||
| 68 | * @since 1.5 | ||
| 69 | * @see Timestamper | ||
| 70 | * @author Vincent Ryan | ||
| 71 | */ | ||
| 72 | |||
| 73 | public class TimestampToken { | ||
| 74 | |||
| 75 | private int version; | ||
| 76 | private ObjectIdentifier policy; | ||
| 77 | private BigInteger serialNumber; | ||
| 78 | private AlgorithmId hashAlgorithm; | ||
| 79 | private byte[] hashedMessage; | ||
| 80 | private Date genTime; | ||
| 81 | private BigInteger nonce; | ||
| 82 | |||
| 83 | /** | ||
| 84 | * Constructs an object to store a timestamp token. | ||
| 85 | * | ||
| 86 | * @param status A buffer containing the ASN.1 BER encoding of the | ||
| 87 | * TSTInfo element defined in RFC 3161. | ||
| 88 | */ | ||
| 89 | public TimestampToken(byte[] timestampTokenInfo) throws IOException { | ||
| 90 | if (timestampTokenInfo == null) { | ||
| 91 | throw new IOException("No timestamp token info"); | ||
| 92 | } | ||
| 93 | parse(timestampTokenInfo); | ||
| 94 | } | ||
| 95 | |||
| 96 | /** | ||
| 97 | * Extract the date and time from the timestamp token. | ||
| 98 | * | ||
| 99 | * @return The date and time when the timestamp was generated. | ||
| 100 | */ | ||
| 101 | public Date getDate() { | ||
| 102 | return genTime; | ||
| 103 | } | ||
| 104 | |||
| 105 | public AlgorithmId getHashAlgorithm() { | ||
| 106 | return hashAlgorithm; | ||
| 107 | } | ||
| 108 | |||
| 109 | // should only be used internally, otherwise return a clone | ||
| 110 | public byte[] getHashedMessage() { | ||
| 111 | return hashedMessage; | ||
| 112 | } | ||
| 113 | |||
| 114 | public BigInteger getNonce() { | ||
| 115 | return nonce; | ||
| 116 | } | ||
| 117 | |||
| 118 | /* | ||
| 119 | * Parses the timestamp token info. | ||
| 120 | * | ||
| 121 | * @param timestampTokenInfo A buffer containing an ASN.1 BER encoded | ||
| 122 | * TSTInfo. | ||
| 123 | * @throws IOException The exception is thrown if a problem is encountered | ||
| 124 | * while parsing. | ||
| 125 | */ | ||
| 126 | private void parse(byte[] timestampTokenInfo) throws IOException { | ||
| 127 | |||
| 128 | DerValue tstInfo = new DerValue(timestampTokenInfo); | ||
| 129 | if (tstInfo.tag != DerValue.tag_Sequence) { | ||
| 130 | throw new IOException("Bad encoding for timestamp token info"); | ||
| 131 | } | ||
| 132 | // Parse version | ||
| 133 | version = tstInfo.data.getInteger(); | ||
| 134 | |||
| 135 | // Parse policy | ||
| 136 | policy = tstInfo.data.getOID(); | ||
| 137 | |||
| 138 | // Parse messageImprint | ||
| 139 | DerValue messageImprint = tstInfo.data.getDerValue(); | ||
| 140 | hashAlgorithm = AlgorithmId.parse(messageImprint.data.getDerValue()); | ||
| 141 | hashedMessage = messageImprint.data.getOctetString(); | ||
| 142 | |||
| 143 | // Parse serialNumber | ||
| 144 | serialNumber = tstInfo.data.getBigInteger(); | ||
| 145 | |||
| 146 | // Parse genTime | ||
| 147 | genTime = tstInfo.data.getGeneralizedTime(); | ||
| 148 | |||
| 149 | // Parse optional elements, if present | ||
| 150 | while (tstInfo.data.available() > 0) { | ||
| 151 | DerValue d = tstInfo.data.getDerValue(); | ||
| 152 | if (d.tag == DerValue.tag_Integer) { // must be the nonce | ||
| 153 | nonce = d.getBigInteger(); | ||
| 154 | break; | ||
| 155 | } | ||
| 156 | |||
| 157 | // Additional fields: | ||
| 158 | // Parse accuracy | ||
| 159 | // Parse ordering | ||
| 160 | // Parse tsa | ||
| 161 | // Parse extensions | ||
| 162 | } | ||
| 163 | } | ||
| 164 | } | ||