org.bouncycastle.asn1.ASN1UTCTime Maven / Gradle / Ivy
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package org.bouncycastle.asn1;
import java.io.IOException;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Locale;
import java.util.SimpleTimeZone;
import org.bouncycastle.util.Arrays;
import org.bouncycastle.util.Strings;
/**
- * UTC time object.
* Internal facade of {@link ASN1UTCTime}.
*
* This datatype is valid only from 1950-01-01 00:00:00 UTC until 2049-12-31 23:59:59 UTC.
*
*
* X.690
* 11: Restrictions on BER employed by both CER and DER
* 11.8 UTCTime
* 11.8.1 The encoding shall terminate with "Z",
* as described in the ITU-T X.680 | ISO/IEC 8824-1 clause on UTCTime.
*
* 11.8.2 The seconds element shall always be present.
*
* 11.8.3 Midnight (GMT) shall be represented in the form:
*
* "YYMMDD000000Z"
*
* where "YYMMDD" represents the day following the midnight in question.
*/
public class ASN1UTCTime
extends ASN1Primitive
{
private byte[] time;
/**
* Return an UTC Time from the passed in object.
*
* @param obj an ASN1UTCTime or an object that can be converted into one.
* @exception IllegalArgumentException if the object cannot be converted.
* @return an ASN1UTCTime instance, or null.
*/
public static ASN1UTCTime getInstance(
Object obj)
{
if (obj == null || obj instanceof ASN1UTCTime)
{
return (ASN1UTCTime)obj;
}
if (obj instanceof byte[])
{
try
{
return (ASN1UTCTime)fromByteArray((byte[])obj);
}
catch (Exception e)
{
throw new IllegalArgumentException("encoding error in getInstance: " + e.toString());
}
}
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.
* @return an ASN1UTCTime instance, or null.
*/
public static ASN1UTCTime getInstance(
ASN1TaggedObject obj,
boolean explicit)
{
ASN1Object o = obj.getObject();
if (explicit || o instanceof ASN1UTCTime)
{
return getInstance(o);
}
else
{
return new ASN1UTCTime(ASN1OctetString.getInstance(o).getOctets());
}
}
/**
* 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 ASN1UTCTime(
String time)
{
this.time = Strings.toByteArray(time);
try
{
this.getDate();
}
catch (ParseException e)
{
throw new IllegalArgumentException("invalid date string: " + e.getMessage());
}
}
/**
* Base constructor from a java.util.date object
* @param time the Date to build the time from.
*/
public ASN1UTCTime(
Date time)
{
SimpleDateFormat dateF = new SimpleDateFormat("yyMMddHHmmss'Z'", DateUtil.EN_Locale);
dateF.setTimeZone(new SimpleTimeZone(0,"Z"));
this.time = Strings.toByteArray(dateF.format(time));
}
/**
* Base constructor from a java.util.date and Locale - you may need to use this if the default locale
* doesn't use a Gregorian calender so that the GeneralizedTime produced is compatible with other ASN.1 implementations.
*
* @param time a date object representing the time of interest.
* @param locale an appropriate Locale for producing an ASN.1 UTCTime value.
*/
public ASN1UTCTime(
Date time,
Locale locale)
{
SimpleDateFormat dateF = new SimpleDateFormat("yyMMddHHmmss'Z'", locale);
dateF.setTimeZone(new SimpleTimeZone(0,"Z"));
this.time = Strings.toByteArray(dateF.format(time));
}
ASN1UTCTime(
byte[] time)
{
if (time.length < 2)
{
throw new IllegalArgumentException("UTCTime string too short");
}
this.time = time;
if (!(isDigit(0) && isDigit(1)))
{
throw new IllegalArgumentException("illegal characters in UTCTime string");
}
}
/**
* Return the time as a date based on whatever a 2 digit year will return. For
* standardised processing use getAdjustedDate().
*
* @return the resulting date
* @exception ParseException if the date string cannot be parsed.
*/
public Date getDate()
throws ParseException
{
SimpleDateFormat dateF = new SimpleDateFormat("yyMMddHHmmssz");
return DateUtil.epochAdjust(dateF.parse(getTime()));
}
/**
* Return the time as an adjusted date
* in the range of 1950 - 2049.
*
* @return a date in the range of 1950 to 2049.
* @exception ParseException if the date string cannot be parsed.
*/
public Date getAdjustedDate()
throws ParseException
{
SimpleDateFormat dateF = new SimpleDateFormat("yyyyMMddHHmmssz");
dateF.setTimeZone(new SimpleTimeZone(0,"Z"));
return DateUtil.epochAdjust(dateF.parse(getAdjustedTime()));
}
/**
* 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()
{
String stime = Strings.fromByteArray(time);
//
// standardise the format.
//
if (stime.indexOf('-') < 0 && stime.indexOf('+') < 0)
{
if (stime.length() == 11)
{
return stime.substring(0, 10) + "00GMT+00:00";
}
else
{
return stime.substring(0, 12) + "GMT+00:00";
}
}
else
{
int index = stime.indexOf('-');
if (index < 0)
{
index = stime.indexOf('+');
}
String d = stime;
if (index == stime.length() - 3)
{
d += "00";
}
if (index == 10)
{
return d.substring(0, 10) + "00GMT" + d.substring(10, 13) + ":" + d.substring(13, 15);
}
else
{
return d.substring(0, 12) + "GMT" + d.substring(12, 15) + ":" + d.substring(15, 17);
}
}
}
/**
* Return a time string 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 boolean isDigit(int pos)
{
return time.length > pos && time[pos] >= '0' && time[pos] <= '9';
}
boolean isConstructed()
{
return false;
}
int encodedLength()
{
int length = time.length;
return 1 + StreamUtil.calculateBodyLength(length) + length;
}
void encode(ASN1OutputStream out, boolean withTag) throws IOException
{
out.writeEncoded(withTag, BERTags.UTC_TIME, time);
}
boolean asn1Equals(
ASN1Primitive o)
{
if (!(o instanceof ASN1UTCTime))
{
return false;
}
return Arrays.areEqual(time, ((ASN1UTCTime)o).time);
}
public int hashCode()
{
return Arrays.hashCode(time);
}
public String toString()
{
return Strings.fromByteArray(time);
}
}