package com.lowagie.bc.asn1; import java.io.IOException; import java.text.SimpleDateFormat; import java.util.Date; import java.util.SimpleTimeZone; /** * UTC time object. */ public class DERUTCTime extends DERObject { String time; /** * return an UTC Time from the passed in object. * * @exception IllegalArgumentException if the object cannot be converted. */ public static DERUTCTime getInstance( Object obj) { if (obj == null || obj instanceof DERUTCTime) { return (DERUTCTime)obj; } if (obj instanceof ASN1OctetString) { return new DERUTCTime(((ASN1OctetString)obj).getOctets()); } throw new IllegalArgumentException("illegal object in getInstance: " + obj.getClass().getName()); } /** * return an UTC Time from a tagged object. * * @param obj the tagged object holding the object we want * @param explicit true if the object is meant to be explicitly * tagged false otherwise. * @exception IllegalArgumentException if the tagged object cannot * be converted. */ public static DERUTCTime getInstance( ASN1TaggedObject obj, boolean explicit) { return getInstance(obj.getObject()); } /** * The correct format for this is YYMMDDHHMMSSZ (it used to be that seconds were * never encoded. When you're creating one of these objects from scratch, that's * what you want to use, otherwise we'll try to deal with whatever gets read from * the input stream... (this is why the input format is different from the getTime() * method output). *

* * @param time the time string. */ public DERUTCTime( String time) { this.time = time; } /** * base constructer from a java.util.date object */ public DERUTCTime( Date time) { SimpleDateFormat dateF = new SimpleDateFormat("yyMMddHHmmss'Z'"); dateF.setTimeZone(new SimpleTimeZone(0,"Z")); this.time = dateF.format(time); } DERUTCTime( byte[] bytes) { // // explicitly convert to characters // char[] dateC = new char[bytes.length]; for (int i = 0; i != dateC.length; i++) { dateC[i] = (char)(bytes[i] & 0xff); } this.time = new String(dateC); } /** * return the time - always in the form of * YYMMDDhhmmssGMT(+hh:mm|-hh:mm). *

* Normally in a certificate we would expect "Z" rather than "GMT", * however adding the "GMT" means we can just use: *

     *     dateF = new SimpleDateFormat("yyMMddHHmmssz");
     * 
* To read in the time and get a date which is compatible with our local * time zone. *

* Note: In some cases, due to the local date processing, this * may lead to unexpected results. If you want to stick the normal * convention of 1950 to 2049 use the getAdjustedTime() method. */ public String getTime() { // // standardise the format. // if (time.length() == 11) { return time.substring(0, 10) + "00GMT+00:00"; } else if (time.length() == 13) { return time.substring(0, 12) + "GMT+00:00"; } else if (time.length() == 17) { return time.substring(0, 12) + "GMT" + time.substring(12, 15) + ":" + time.substring(15, 17); } return time; } /** * return the time as an adjusted date with a 4 digit year. This goes * in the range of 1950 - 2049. */ public String getAdjustedTime() { String d = this.getTime(); if (d.charAt(0) < '5') { return "20" + d; } else { return "19" + d; } } private byte[] getOctets() { char[] cs = time.toCharArray(); byte[] bs = new byte[cs.length]; for (int i = 0; i != cs.length; i++) { bs[i] = (byte)cs[i]; } return bs; } void encode( DEROutputStream out) throws IOException { out.writeEncoded(UTC_TIME, this.getOctets()); } public boolean equals( Object o) { if ((o == null) || !(o instanceof DERUTCTime)) { return false; } return time.equals(((DERUTCTime)o).time); } }