port.org.bouncycastle.asn1.ASN1GeneralizedTime Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of dss-model Show documentation
Show all versions of dss-model Show documentation
DSS Model contains the data model representation for DSS
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 java.util.TimeZone;
import port.org.bouncycastle.util.Arrays;
import port.org.bouncycastle.util.Strings;
/**
* Base class representing the ASN.1 GeneralizedTime type.
*
* The main difference between these and UTC time is a 4 digit year.
*
*/
public class ASN1GeneralizedTime extends ASN1Primitive {
private byte[] time;
/**
* return a generalized time from the passed in object
*
* @param obj
* an ASN1GeneralizedTime or an object that can be converted into one.
* @return an ASN1GeneralizedTime instance, or null.
* @throws 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 byte[]) {
try {
return (ASN1GeneralizedTime) 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 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.
* @return an ASN1GeneralizedTime instance.
* @throws IllegalArgumentException
* if the tagged object cannot
* be converted.
*/
public static ASN1GeneralizedTime getInstance(ASN1TaggedObject obj, boolean explicit) {
ASN1Primitive o = obj.getObject();
if (explicit || (o instanceof ASN1GeneralizedTime)) {
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.
* @throws IllegalArgumentException
* if String is an illegal format.
*/
public ASN1GeneralizedTime(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
* a date object representing the time of interest.
*/
public ASN1GeneralizedTime(Date time) {
SimpleDateFormat dateF = new SimpleDateFormat("yyyyMMddHHmmss'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 GeneralizedTime value.
*/
public ASN1GeneralizedTime(Date time, Locale locale) {
SimpleDateFormat dateF = new SimpleDateFormat("yyyyMMddHHmmss'Z'", locale);
dateF.setTimeZone(new SimpleTimeZone(0, "Z"));
this.time = Strings.toByteArray(dateF.format(time));
}
ASN1GeneralizedTime(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).
*
* 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() {
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() throws ParseException {
SimpleDateFormat dateF;
String stime = Strings.fromByteArray(time);
String d = stime;
if (stime.endsWith("Z")) {
if (hasFractionalSeconds()) {
dateF = new SimpleDateFormat("yyyyMMddHHmmss.SSS'Z'");
} else {
dateF = new SimpleDateFormat("yyyyMMddHHmmss'Z'");
}
dateF.setTimeZone(new SimpleTimeZone(0, "Z"));
} else if ((stime.indexOf('-') > 0) || (stime.indexOf('+') > 0)) {
d = this.getTime();
if (hasFractionalSeconds()) {
dateF = new SimpleDateFormat("yyyyMMddHHmmss.SSSz");
} else {
dateF = new SimpleDateFormat("yyyyMMddHHmmssz");
}
dateF.setTimeZone(new SimpleTimeZone(0, "Z"));
} else {
if (hasFractionalSeconds()) {
dateF = new SimpleDateFormat("yyyyMMddHHmmss.SSS");
} else {
dateF = new SimpleDateFormat("yyyyMMddHHmmss");
}
dateF.setTimeZone(new SimpleTimeZone(0, TimeZone.getDefault().getID()));
}
if (hasFractionalSeconds()) {
// java misinterprets extra digits as being milliseconds...
String frac = d.substring(14);
int index;
for (index = 1; index < frac.length(); index++) {
char ch = frac.charAt(index);
if (!(('0' <= ch) && (ch <= '9'))) {
break;
}
}
if ((index - 1) > 3) {
frac = frac.substring(0, 4) + frac.substring(index);
d = d.substring(0, 14) + frac;
} else if ((index - 1) == 1) {
frac = frac.substring(0, index) + "00" + frac.substring(index);
d = d.substring(0, 14) + frac;
} else if ((index - 1) == 2) {
frac = frac.substring(0, index) + "0" + frac.substring(index);
d = d.substring(0, 14) + frac;
}
}
return dateF.parse(d);
}
private boolean hasFractionalSeconds() {
for (int i = 0; i != time.length; i++) {
if (time[i] == '.') {
if (i == 14) {
return true;
}
}
}
return false;
}
@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.writeEncoded(BERTags.GENERALIZED_TIME, time);
}
@Override
boolean asn1Equals(ASN1Primitive o) {
if (!(o instanceof ASN1GeneralizedTime)) {
return false;
}
return Arrays.areEqual(time, ((ASN1GeneralizedTime) o).time);
}
@Override
public int hashCode() {
return Arrays.hashCode(time);
}
}
© 2015 - 2025 Weber Informatics LLC | Privacy Policy