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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 | +} | |