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BERTaggedObject.java
Package: security.rar　[view]
Upload User: lior1029
Upload Date: 2013-05-07
Package Size: 209k
Code Size: 3k
Category:

CA program

Development Platform:

Java

BERTaggedObject.java：Code Content
  1. package org.bouncycastle.asn1;
  3. import java.io.*;
  4. import java.util.*;
  6. /**
  7.  * BER TaggedObject - in ASN.1 nottation this is any object proceeded by
  8.  * a [n] where n is some number - these are assume to follow the construction
  9.  * rules (as with sequences).
  10.  */
  11. public class BERTaggedObject
  12.     extends DERTaggedObject
  13. {
  14.     /**
  15.      * @param tagNo the tag number for this object.
  16.      * @param obj the tagged object.
  17.      */
  18.     public BERTaggedObject(
  19.         int             tagNo,
  20.         DEREncodable    obj)
  21.     {
  22. super(tagNo, obj);
  23.     }
  25.     /**
  26.      * @param explicit true if an explicitly tagged object.
  27.      * @param tagNo the tag number for this object.
  28.      * @param obj the tagged object.
  29.      */
  30.     public BERTaggedObject(
  31.         boolean         explicit,
  32.         int             tagNo,
  33.         DEREncodable    obj)
  34.     {
  35. super(explicit, tagNo, obj);
  36.     }
  38.     /**
  39.      * create an implicitly tagged object that contains a zero
  40.      * length sequence.
  41.      */
  42.     public BERTaggedObject(
  43.         int             tagNo)
  44.     {
  45.         super(false, tagNo, new BERConstructedSequence());
  46.     }
  48.     void encode(
  49.         DEROutputStream  out)
  50.         throws IOException
  51.     {
  52.         if (out instanceof ASN1OutputStream || out instanceof BEROutputStream)
  53.         {
  54.             out.write(CONSTRUCTED | TAGGED | tagNo);
  55.             out.write(0x80);
  57.             if (!empty)
  58.             {
  59.                 if (!explicit)
  60.                 {
  61.                     if (obj instanceof ASN1OctetString)
  62.                     {
  63.                         Enumeration  e;
  65.                         if (obj instanceof BERConstructedOctetString)
  66.                         {
  67.                             e = ((BERConstructedOctetString)obj).getObjects();
  68.                         }
  69.                         else
  70.                         {
  71.                             ASN1OctetString             octs = (ASN1OctetString)obj;
  72.                             BERConstructedOctetString   berO = new BERConstructedOctetString(octs.getOctets());
  74.                             e = berO.getObjects();
  75.                         }
  77.                         while (e.hasMoreElements())
  78.                         {
  79.                             out.writeObject(e.nextElement());
  80.                         }
  81.                     }
  82.                     else if (obj instanceof ASN1Sequence)
  83.                     {
  84.                         Enumeration  e = ((ASN1Sequence)obj).getObjects();
  86.                         while (e.hasMoreElements())
  87.                         {
  88.                             out.writeObject(e.nextElement());
  89.                         }
  90.                     }
  91.                     else if (obj instanceof ASN1Set)
  92.                     {
  93.                         Enumeration  e = ((ASN1Set)obj).getObjects();
  95.                         while (e.hasMoreElements())
  96.                         {
  97.                             out.writeObject(e.nextElement());
  98.                         }
  99.                     }
  100.                     else
  101.                     {
  102.                         throw new RuntimeException("not implemented: " + obj.getClass().getName());
  103.                     }
  104.                 }
  105.                 else
  106.                 {
  107.                     out.writeObject(obj);
  108.                 }
  109.             }
  111.             out.write(0x00);
  112.             out.write(0x00);
  113.         }
  114.         else
  115.         {
  116.             super.encode(out);
  117.         }
  118.     }
  119. }