package com.lowagie.bc.asn1; import java.io.IOException; import java.text.ParseException; import java.text.SimpleDateFormat; import java.util.Date; import java.util.SimpleTimeZone; /** * Generalized time object. */ public class DERGeneralizedTime extends DERObject { String time; /** * return a generalized time from the passed in object * * @exception IllegalArgumentException if the object cannot be converted. */ public static DERGeneralizedTime getInstance( Object obj) { if (obj == null || obj instanceof DERGeneralizedTime) { return (DERGeneralizedTime)obj; } if (obj instanceof ASN1OctetString) { return new DERGeneralizedTime(((ASN1OctetString)obj).getOctets()); } throw new IllegalArgumentException("illegal object in getInstance: " + obj.getClass().getName()); } /** * return a Generalized Time object 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 DERGeneralizedTime getInstance( ASN1TaggedObject obj, boolean explicit) { return getInstance(obj.getObject()); } /** * The correct format for this is YYYYMMDDHHMMSSZ, or without the Z * for local time, or Z+-HHMM on the end, for difference between local * time and UTC time. *

* * @param time the time string. */ public DERGeneralizedTime( String time) { this.time = time; } /** * base constructer from a java.util.date object */ public DERGeneralizedTime( Date time) { SimpleDateFormat dateF = new SimpleDateFormat("yyyyMMddHHmmss'Z'"); dateF.setTimeZone(new SimpleTimeZone(0,"Z")); this.time = dateF.format(time); } DERGeneralizedTime( 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 * YYYYMMDDhhmmssGMT(+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("yyyyMMddHHmmssz");
     * 
* To read in the time and get a date which is compatible with our local * time zone. */ public String getTime() { // // standardise the format. // if (time.charAt(time.length() - 1) == 'Z') { return time.substring(0, time.length() - 1) + "GMT+00:00"; } else { int signPos = time.length() - 5; char sign = time.charAt(signPos); if (sign == '-' || sign == '+') { return time.substring(0, signPos) + "GMT" + time.substring(signPos, signPos + 3) + ":" + time.substring(signPos + 3); } else { signPos = time.length() - 3; sign = time.charAt(signPos); if (sign == '-' || sign == '+') { return time.substring(0, signPos) + "GMT" + time.substring(signPos) + ":00"; } } } return time; } public Date getDate() throws ParseException { SimpleDateFormat dateF = new SimpleDateFormat("yyyyMMddHHmmss'Z'"); dateF.setTimeZone(new SimpleTimeZone(0, "Z")); return dateF.parse(time); } 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(GENERALIZED_TIME, this.getOctets()); } public boolean equals( Object o) { if ((o == null) || !(o instanceof DERGeneralizedTime)) { return false; } return time.equals(((DERGeneralizedTime)o).time); } }