package org.apache.commons.ssl.asn1;
import java.io.IOException;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.SimpleTimeZone;
import java.util.TimeZone;
/** Generalized time object. */
public class DERGeneralizedTime
extends ASN1Object {
String time;
/**
* return a generalized time from the passed in object
*
* @throws 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.
* @throws 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 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 DERGeneralizedTime(
String time) {
this.time = time;
try {
this.getDate();
}
catch (ParseException e) {
throw new IllegalArgumentException("invalid date string: " + e.getMessage());
}
}
/** 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.
*
* @return The time string as it appeared in the encoded object.
*/
public String getTimeString() {
return 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() {
//
// 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 + 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 d = time;
if (time.endsWith("Z")) {
if (hasFractionalSeconds()) {
dateF = new SimpleDateFormat("yyyyMMddHHmmss.SSSS'Z'");
} else {
dateF = new SimpleDateFormat("yyyyMMddHHmmss'Z'");
}
dateF.setTimeZone(new SimpleTimeZone(0, "Z"));
} else if (time.indexOf('-') > 0 || time.indexOf('+') > 0) {
d = this.getTime();
if (hasFractionalSeconds()) {
dateF = new SimpleDateFormat("yyyyMMddHHmmss.SSSSz");
} else {
dateF = new SimpleDateFormat("yyyyMMddHHmmssz");
}
dateF.setTimeZone(new SimpleTimeZone(0, "Z"));
} else {
if (hasFractionalSeconds()) {
dateF = new SimpleDateFormat("yyyyMMddHHmmss.SSSS");
} else {
dateF = new SimpleDateFormat("yyyyMMddHHmmss");
}
dateF.setTimeZone(new SimpleTimeZone(0, TimeZone.getDefault().getID()));
}
return dateF.parse(d);
}
private boolean hasFractionalSeconds() {
return time.indexOf('.') == 14;
}
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());
}
boolean asn1Equals(
DERObject o) {
if (!(o instanceof DERGeneralizedTime)) {
return false;
}
return time.equals(((DERGeneralizedTime) o).time);
}
public int hashCode() {
return time.hashCode();
}
}