| /* |
| * Copyright (c) 2003, 2011, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package java.security; |
| |
| import java.io.*; |
| import java.security.cert.Certificate; |
| import java.security.cert.CertPath; |
| import java.security.cert.X509Extension; |
| import java.util.Date; |
| import java.util.List; |
| |
| /** |
| * This class encapsulates information about a signed timestamp. |
| * It is immutable. |
| * It includes the timestamp's date and time as well as information about the |
| * Timestamping Authority (TSA) which generated and signed the timestamp. |
| * |
| * @since 1.5 |
| * @author Vincent Ryan |
| */ |
| |
| public final class Timestamp implements Serializable { |
| |
| private static final long serialVersionUID = -5502683707821851294L; |
| |
| /** |
| * The timestamp's date and time |
| * |
| * @serial |
| */ |
| private Date timestamp; |
| |
| /** |
| * The TSA's certificate path. |
| * |
| * @serial |
| */ |
| private CertPath signerCertPath; |
| |
| /* |
| * Hash code for this timestamp. |
| */ |
| private transient int myhash = -1; |
| |
| /** |
| * Constructs a Timestamp. |
| * |
| * @param timestamp is the timestamp's date and time. It must not be null. |
| * @param signerCertPath is the TSA's certificate path. It must not be null. |
| * @throws NullPointerException if timestamp or signerCertPath is null. |
| */ |
| public Timestamp(Date timestamp, CertPath signerCertPath) { |
| if (timestamp == null || signerCertPath == null) { |
| throw new NullPointerException(); |
| } |
| this.timestamp = new Date(timestamp.getTime()); // clone |
| this.signerCertPath = signerCertPath; |
| } |
| |
| /** |
| * Returns the date and time when the timestamp was generated. |
| * |
| * @return The timestamp's date and time. |
| */ |
| public Date getTimestamp() { |
| return new Date(timestamp.getTime()); // clone |
| } |
| |
| /** |
| * Returns the certificate path for the Timestamping Authority. |
| * |
| * @return The TSA's certificate path. |
| */ |
| public CertPath getSignerCertPath() { |
| return signerCertPath; |
| } |
| |
| /** |
| * Returns the hash code value for this timestamp. |
| * The hash code is generated using the date and time of the timestamp |
| * and the TSA's certificate path. |
| * |
| * @return a hash code value for this timestamp. |
| */ |
| public int hashCode() { |
| if (myhash == -1) { |
| myhash = timestamp.hashCode() + signerCertPath.hashCode(); |
| } |
| return myhash; |
| } |
| |
| /** |
| * Tests for equality between the specified object and this |
| * timestamp. Two timestamps are considered equal if the date and time of |
| * their timestamp's and their signer's certificate paths are equal. |
| * |
| * @param obj the object to test for equality with this timestamp. |
| * |
| * @return true if the timestamp are considered equal, false otherwise. |
| */ |
| public boolean equals(Object obj) { |
| if (obj == null || (!(obj instanceof Timestamp))) { |
| return false; |
| } |
| Timestamp that = (Timestamp)obj; |
| |
| if (this == that) { |
| return true; |
| } |
| return (timestamp.equals(that.getTimestamp()) && |
| signerCertPath.equals(that.getSignerCertPath())); |
| } |
| |
| /** |
| * Returns a string describing this timestamp. |
| * |
| * @return A string comprising the date and time of the timestamp and |
| * its signer's certificate. |
| */ |
| public String toString() { |
| StringBuffer sb = new StringBuffer(); |
| sb.append("("); |
| sb.append("timestamp: " + timestamp); |
| List<? extends Certificate> certs = signerCertPath.getCertificates(); |
| if (!certs.isEmpty()) { |
| sb.append("TSA: " + certs.get(0)); |
| } else { |
| sb.append("TSA: <empty>"); |
| } |
| sb.append(")"); |
| return sb.toString(); |
| } |
| |
| // Explicitly reset hash code value to -1 |
| private void readObject(ObjectInputStream ois) |
| throws IOException, ClassNotFoundException { |
| ois.defaultReadObject(); |
| myhash = -1; |
| timestamp = new Date(timestamp.getTime()); |
| } |
| } |