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| 1 | /* | ||
| 2 | * Copyright (c) 2003, 2011, 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 java.security; | ||
| 27 | |||
| 28 | import java.io.*; | ||
| 29 | import java.security.cert.Certificate; | ||
| 30 | import java.security.cert.CertPath; | ||
| 31 | import java.security.cert.X509Extension; | ||
| 32 | import java.util.Date; | ||
| 33 | import java.util.List; | ||
| 34 | |||
| 35 | /** | ||
| 36 | * This class encapsulates information about a signed timestamp. | ||
| 37 | * It is immutable. | ||
| 38 | * It includes the timestamp's date and time as well as information about the | ||
| 39 | * Timestamping Authority (TSA) which generated and signed the timestamp. | ||
| 40 | * | ||
| 41 | * @since 1.5 | ||
| 42 | * @author Vincent Ryan | ||
| 43 | */ | ||
| 44 | |||
| 45 | public final class Timestamp implements Serializable { | ||
| 46 | |||
| 47 | private static final long serialVersionUID = -5502683707821851294L; | ||
| 48 | |||
| 49 | /** | ||
| 50 | * The timestamp's date and time | ||
| 51 | * | ||
| 52 | * @serial | ||
| 53 | */ | ||
| 54 | private Date timestamp; | ||
| 55 | |||
| 56 | /** | ||
| 57 | * The TSA's certificate path. | ||
| 58 | * | ||
| 59 | * @serial | ||
| 60 | */ | ||
| 61 | private CertPath signerCertPath; | ||
| 62 | |||
| 63 | /* | ||
| 64 | * Hash code for this timestamp. | ||
| 65 | */ | ||
| 66 | private transient int myhash = -1; | ||
| 67 | |||
| 68 | /** | ||
| 69 | * Constructs a Timestamp. | ||
| 70 | * | ||
| 71 | * @param timestamp is the timestamp's date and time. It must not be null. | ||
| 72 | * @param signerCertPath is the TSA's certificate path. It must not be null. | ||
| 73 | * @throws NullPointerException if timestamp or signerCertPath is null. | ||
| 74 | */ | ||
| 75 | public Timestamp(Date timestamp, CertPath signerCertPath) { | ||
| 76 | if (timestamp == null || signerCertPath == null) { | ||
| 77 | throw new NullPointerException(); | ||
| 78 | } | ||
| 79 | this.timestamp = new Date(timestamp.getTime()); // clone | ||
| 80 | this.signerCertPath = signerCertPath; | ||
| 81 | } | ||
| 82 | |||
| 83 | /** | ||
| 84 | * Returns the date and time when the timestamp was generated. | ||
| 85 | * | ||
| 86 | * @return The timestamp's date and time. | ||
| 87 | */ | ||
| 88 | public Date getTimestamp() { | ||
| 89 | return new Date(timestamp.getTime()); // clone | ||
| 90 | } | ||
| 91 | |||
| 92 | /** | ||
| 93 | * Returns the certificate path for the Timestamping Authority. | ||
| 94 | * | ||
| 95 | * @return The TSA's certificate path. | ||
| 96 | */ | ||
| 97 | public CertPath getSignerCertPath() { | ||
| 98 | return signerCertPath; | ||
| 99 | } | ||
| 100 | |||
| 101 | /** | ||
| 102 | * Returns the hash code value for this timestamp. | ||
| 103 | * The hash code is generated using the date and time of the timestamp | ||
| 104 | * and the TSA's certificate path. | ||
| 105 | * | ||
| 106 | * @return a hash code value for this timestamp. | ||
| 107 | */ | ||
| 108 | public int hashCode() { | ||
| 109 | if (myhash == -1) { | ||
| 110 | myhash = timestamp.hashCode() + signerCertPath.hashCode(); | ||
| 111 | } | ||
| 112 | return myhash; | ||
| 113 | } | ||
| 114 | |||
| 115 | /** | ||
| 116 | * Tests for equality between the specified object and this | ||
| 117 | * timestamp. Two timestamps are considered equal if the date and time of | ||
| 118 | * their timestamp's and their signer's certificate paths are equal. | ||
| 119 | * | ||
| 120 | * @param obj the object to test for equality with this timestamp. | ||
| 121 | * | ||
| 122 | * @return true if the timestamp are considered equal, false otherwise. | ||
| 123 | */ | ||
| 124 | public boolean equals(Object obj) { | ||
| 125 | if (obj == null || (!(obj instanceof Timestamp))) { | ||
| 126 | return false; | ||
| 127 | } | ||
| 128 | Timestamp that = (Timestamp)obj; | ||
| 129 | |||
| 130 | if (this == that) { | ||
| 131 | return true; | ||
| 132 | } | ||
| 133 | return (timestamp.equals(that.getTimestamp()) && | ||
| 134 | signerCertPath.equals(that.getSignerCertPath())); | ||
| 135 | } | ||
| 136 | |||
| 137 | /** | ||
| 138 | * Returns a string describing this timestamp. | ||
| 139 | * | ||
| 140 | * @return A string comprising the date and time of the timestamp and | ||
| 141 | * its signer's certificate. | ||
| 142 | */ | ||
| 143 | public String toString() { | ||
| 144 | StringBuffer sb = new StringBuffer(); | ||
| 145 | sb.append("("); | ||
| 146 | sb.append("timestamp: " + timestamp); | ||
| 147 | List<? extends Certificate> certs = signerCertPath.getCertificates(); | ||
| 148 | if (!certs.isEmpty()) { | ||
| 149 | sb.append("TSA: " + certs.get(0)); | ||
| 150 | } else { | ||
| 151 | sb.append("TSA: <empty>"); | ||
| 152 | } | ||
| 153 | sb.append(")"); | ||
| 154 | return sb.toString(); | ||
| 155 | } | ||
| 156 | |||
| 157 | // Explicitly reset hash code value to -1 | ||
| 158 | private void readObject(ObjectInputStream ois) | ||
| 159 | throws IOException, ClassNotFoundException { | ||
| 160 | ois.defaultReadObject(); | ||
| 161 | myhash = -1; | ||
| 162 | timestamp = new Date(timestamp.getTime()); | ||
| 163 | } | ||
| 164 | } | ||