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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.
* <p>
*
* @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).
* <p>
* Normally in a certificate we would expect "Z" rather than "GMT",
* however adding the "GMT" means we can just use:
* <pre>
* dateF = new SimpleDateFormat("yyyyMMddHHmmssz");
* </pre>
* 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);
}
}
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