diff options
Diffstat (limited to 'src/main/java/com/lowagie/bc/asn1/DERUTCTime.java')
| -rw-r--r-- | src/main/java/com/lowagie/bc/asn1/DERUTCTime.java | 183 |
1 files changed, 183 insertions, 0 deletions
diff --git a/src/main/java/com/lowagie/bc/asn1/DERUTCTime.java b/src/main/java/com/lowagie/bc/asn1/DERUTCTime.java new file mode 100644 index 0000000..200b23e --- /dev/null +++ b/src/main/java/com/lowagie/bc/asn1/DERUTCTime.java @@ -0,0 +1,183 @@ +package com.lowagie.bc.asn1;
+
+import java.io.IOException;
+import java.text.SimpleDateFormat;
+import java.util.Date;
+import java.util.SimpleTimeZone;
+
+/**
+ * UTC time object.
+ */
+public class DERUTCTime
+ extends DERObject
+{
+ String time;
+
+ /**
+ * return an UTC Time from the passed in object.
+ *
+ * @exception IllegalArgumentException if the object cannot be converted.
+ */
+ public static DERUTCTime getInstance(
+ Object obj)
+ {
+ if (obj == null || obj instanceof DERUTCTime)
+ {
+ return (DERUTCTime)obj;
+ }
+
+ if (obj instanceof ASN1OctetString)
+ {
+ return new DERUTCTime(((ASN1OctetString)obj).getOctets());
+ }
+
+ 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.
+ */
+ public static DERUTCTime getInstance(
+ ASN1TaggedObject obj,
+ boolean explicit)
+ {
+ return getInstance(obj.getObject());
+ }
+
+ /**
+ * 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 DERUTCTime(
+ String time)
+ {
+ this.time = time;
+ }
+
+ /**
+ * base constructer from a java.util.date object
+ */
+ public DERUTCTime(
+ Date time)
+ {
+ SimpleDateFormat dateF = new SimpleDateFormat("yyMMddHHmmss'Z'");
+
+ dateF.setTimeZone(new SimpleTimeZone(0,"Z"));
+
+ this.time = dateF.format(time);
+ }
+
+ DERUTCTime(
+ 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
+ * 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()
+ {
+ //
+ // standardise the format.
+ //
+ if (time.length() == 11)
+ {
+ return time.substring(0, 10) + "00GMT+00:00";
+ }
+ else if (time.length() == 13)
+ {
+ return time.substring(0, 12) + "GMT+00:00";
+ }
+ else if (time.length() == 17)
+ {
+ return time.substring(0, 12) + "GMT" + time.substring(12, 15) + ":" + time.substring(15, 17);
+ }
+
+ return time;
+ }
+
+ /**
+ * return the time 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;
+ }
+ }
+
+ 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(UTC_TIME, this.getOctets());
+ }
+
+ public boolean equals(
+ Object o)
+ {
+ if ((o == null) || !(o instanceof DERUTCTime))
+ {
+ return false;
+ }
+
+ return time.equals(((DERUTCTime)o).time);
+ }
+}
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