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/* * @(#)Timestamp.java 1.3 05/11/17 * * Copyright 2006 Sun Microsystems, Inc. All rights reserved. * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms. */ package java.security; import java.io.Serializable; import java.security.cert.CertPath; import java.security.cert.X509Extension; import java.util.Date; /** * 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 * @version 1.3, 11/17/05 * @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); sb.append("TSA: " + signerCertPath.getCertificates().get(0)); sb.append(")"); return sb.toString(); } }