| package org.bouncycastle.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 |
| * |
| * @exception 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. |
| * @exception 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. |
| * @exception 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.SSS'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.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; |
| } |
| } |
| |
| 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(); |
| } |
| } |