--- /dev/null
+package org.bouncycastle.asn1;
+
+import java.io.*;
+import java.util.*;
+import java.io.*;
+import java.text.*;
+
+/**
+ * Generalized time object.
+ */
+public class DERGeneralizedTime
+ extends DERObject
+{
+ 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 YYYYMMDDHHMMSSZ, or without the Z
+ * for local time, or Z+-HHMM on the end, for difference between local
+ * time and UTC time.
+ * <p>
+ *
+ * @param time the time string.
+ */
+ public DERGeneralizedTime(
+ String time)
+ {
+ this.time = time;
+ }
+
+ /**
+ * 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 - 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.length() == 15)
+ {
+ return time.substring(0, 14) + "GMT+00:00";
+ }
+ else if (time.length() == 17)
+ {
+ return time.substring(0, 14) + "GMT" + time.substring(15, 17) + ":" + time.substring(17, 19);
+ }
+
+ return time;
+ }
+
+ 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());
+ }
+
+ public boolean equals(
+ Object o)
+ {
+ if ((o == null) || !(o instanceof DERGeneralizedTime))
+ {
+ return false;
+ }
+
+ return time.equals(((DERGeneralizedTime)o).time);
+ }
+}