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package org.spongycastle.asn1;
import java.io.IOException;
import java.util.Date;
import java.util.TimeZone;
import org.spongycastle.util.Arrays;
import org.spongycastle.util.Strings;
/**
* Generalized time object.
*/
public class DERGeneralizedTime
extends ASN1Primitive
{
private byte[] time;
/**
* return a generalized time from the passed in object
*
* @exception IllegalArgumentException if the object cannot be converted.
*/
public static ASN1GeneralizedTime getInstance(
Object obj)
{
if (obj == null || obj instanceof ASN1GeneralizedTime)
{
return (ASN1GeneralizedTime)obj;
}
if (obj instanceof DERGeneralizedTime)
{
return new ASN1GeneralizedTime(((DERGeneralizedTime)obj).time);
}
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 ASN1GeneralizedTime getInstance(
ASN1TaggedObject obj,
boolean explicit)
{
ASN1Primitive o = obj.getObject();
if (explicit || o instanceof DERGeneralizedTime)
{
return getInstance(o);
}
else
{
return new ASN1GeneralizedTime(((ASN1OctetString)o).getOctets());
}
}
/**
* The correct format for this is YYYYMMDDHHMMSS[.f]Z, or without the Z
* for local time, or Z|[+|-]HHMM on the end, for difference between local
* time and UTC time. The fractional second amount f must consist of at
* least one number with trailing zeroes removed.
*
* @param time the time string.
* @exception IllegalArgumentException if String is an illegal format.
*/
public DERGeneralizedTime(
String time)
{
char last = time.charAt(time.length() - 1);
if (last != 'Z' && !(last >= 0 && last <= '9'))
{
if (time.indexOf('-') < 0 && time.indexOf('+') < 0)
{
throw new IllegalArgumentException("time needs to be in format YYYYMMDDHHMMSS[.f]Z or YYYYMMDDHHMMSS[.f][+-]HHMM");
}
}
this.time = Strings.toByteArray(time);
}
/**
* base constructer from a java.util.date object
*/
public DERGeneralizedTime(
Date time)
{
this.time = Strings.toByteArray(DateFormatter.getGeneralizedTimeDateString(time, false));
}
protected DERGeneralizedTime(Date date, boolean includeMillis)
{
this.time = Strings.toByteArray(DateFormatter.getGeneralizedTimeDateString(date, true));
}
DERGeneralizedTime(
byte[] bytes)
{
this.time = bytes;
}
/**
* Return the time.
* @return The time string as it appeared in the encoded object.
*/
public String getTimeString()
{
return Strings.fromByteArray(time);
}
/**
* 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()
{
String stime = Strings.fromByteArray(time);
//
// standardise the format.
//
if (stime.charAt(stime.length() - 1) == 'Z')
{
return stime.substring(0, stime.length() - 1) + "GMT+00:00";
}
else
{
int signPos = stime.length() - 5;
char sign = stime.charAt(signPos);
if (sign == '-' || sign == '+')
{
return stime.substring(0, signPos)
+ "GMT"
+ stime.substring(signPos, signPos + 3)
+ ":"
+ stime.substring(signPos + 3);
}
else
{
signPos = stime.length() - 3;
sign = stime.charAt(signPos);
if (sign == '-' || sign == '+')
{
return stime.substring(0, signPos)
+ "GMT"
+ stime.substring(signPos)
+ ":00";
}
}
}
return stime + calculateGMTOffset();
}
private String calculateGMTOffset()
{
String sign = "+";
TimeZone timeZone = TimeZone.getDefault();
int offset = timeZone.getRawOffset();
if (offset < 0)
{
sign = "-";
offset = -offset;
}
int hours = offset / (60 * 60 * 1000);
int minutes = (offset - (hours * 60 * 60 * 1000)) / (60 * 1000);
// try
// {
// if (timeZone.useDaylightTime() && timeZone.inDaylightTime(this.getDate()))
// {
// hours += sign.equals("+") ? 1 : -1;
// }
// }
// catch (ParseException e)
// {
// // we'll do our best and ignore daylight savings
// }
return "GMT" + sign + convert(hours) + ":" + convert(minutes);
}
private String convert(int time)
{
if (time < 10)
{
return "0" + time;
}
return Integer.toString(time);
}
public Date getDate()
{
return DateFormatter.fromGeneralizedTimeString(time);
}
private boolean hasFractionalSeconds()
{
for (int i = 0; i != time.length; i++)
{
if (time[i] == '.')
{
if (i == 14)
{
return true;
}
}
}
return false;
}
boolean isConstructed()
{
return false;
}
int encodedLength()
{
int length = time.length;
return 1 + StreamUtil.calculateBodyLength(length) + length;
}
void encode(
ASN1OutputStream out)
throws IOException
{
out.writeEncoded(BERTags.GENERALIZED_TIME, time);
}
boolean asn1Equals(
ASN1Primitive o)
{
if (!(o instanceof DERGeneralizedTime))
{
return false;
}
return Arrays.areEqual(time, ((DERGeneralizedTime)o).time);
}
public int hashCode()
{
return Arrays.hashCode(time);
}
}
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