port.org.bouncycastle.asn1.ASN1UTCTime Maven / Gradle / Ivy
Show all versions of dss-model Show documentation
package port.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 port.org.bouncycastle.util.Arrays;
import port.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) 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'");
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) {
this.time = time;
}
/**
* 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 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 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;
}
}
@Override
boolean isConstructed() {
return false;
}
@Override
int encodedLength() {
int length = time.length;
return 1 + StreamUtil.calculateBodyLength(length) + length;
}
@Override
void encode(ASN1OutputStream out) throws IOException {
out.write(BERTags.UTC_TIME);
int length = time.length;
out.writeLength(length);
for (int i = 0; i != length; i++) {
out.write(time[i]);
}
}
@Override
boolean asn1Equals(ASN1Primitive o) {
if (!(o instanceof ASN1UTCTime)) {
return false;
}
return Arrays.areEqual(time, ((ASN1UTCTime) o).time);
}
@Override
public int hashCode() {
return Arrays.hashCode(time);
}
@Override
public String toString() {
return Strings.fromByteArray(time);
}
}