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Diffstat (limited to 'core/src/main/java/org/spongycastle/asn1/ASN1UTCTime.java')
| -rw-r--r-- | core/src/main/java/org/spongycastle/asn1/ASN1UTCTime.java | 314 |
1 files changed, 314 insertions, 0 deletions
diff --git a/core/src/main/java/org/spongycastle/asn1/ASN1UTCTime.java b/core/src/main/java/org/spongycastle/asn1/ASN1UTCTime.java new file mode 100644 index 00000000..2f96041f --- /dev/null +++ b/core/src/main/java/org/spongycastle/asn1/ASN1UTCTime.java @@ -0,0 +1,314 @@ +package org.spongycastle.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.spongycastle.util.Arrays; +import org.spongycastle.util.Strings; + +/** +- * UTC time object. + * Internal facade of {@link ASN1UTCTime}. + * <p> + * This datatype is valid only from 1950-01-01 00:00:00 UTC until 2049-12-31 23:59:59 UTC. + * <p> + * <hr> + * <p><b>X.690</b></p> + * <p><b>11: Restrictions on BER employed by both CER and DER</b></p> + * <p><b>11.8 UTCTime </b></p> + * <b>11.8.1</b> The encoding shall terminate with "Z", + * as described in the ITU-T X.680 | ISO/IEC 8824-1 clause on UTCTime. + * <p> + * <b>11.8.2</b> The seconds element shall always be present. + * <p> + * <b>11.8.3</b> Midnight (GMT) shall be represented in the form: + * <blockquote> + * "YYMMDD000000Z" + * </blockquote> + * 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). + * <p> + * + * @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). + * <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("yyMMddHHmmssz"); + * </pre> + * To read in the time and get a date which is compatible with our local + * time zone. + * <p> + * <b>Note:</b> 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; + } + } + + boolean isConstructed() + { + return false; + } + + int encodedLength() + { + int length = time.length; + + return 1 + StreamUtil.calculateBodyLength(length) + length; + } + + 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((byte)time[i]); + } + } + + 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); + } +} |