src/org/bouncycastle/asn1/BERTaggedObject.java

   1 package org.bouncycastle.asn1;
   2
   3 import java.io.*;
   4 import java.util.*;
   5
   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     }
  24
  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     }
  37
  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     }
  47
  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);
  56
  57             if (!empty)
  58             {
  59                 if (!explicit)
  60                 {
  61                     if (obj instanceof BERConstructedOctetString)
  62                     {
  63                         Enumeration  e = ((BERConstructedOctetString)obj).getObjects();
  64
  65                         while (e.hasMoreElements())
  66                         {
  67                             out.writeObject(e.nextElement());
  68                         }
  69                     }
  70                     else if (obj instanceof ASN1Sequence)
  71                     {
  72                         Enumeration  e = ((ASN1Sequence)obj).getObjects();
  73
  74                         while (e.hasMoreElements())
  75                         {
  76                             out.writeObject(e.nextElement());
  77                         }
  78                     }
  79                     else if (obj instanceof ASN1Set)
  80                     {
  81                         Enumeration  e = ((ASN1Set)obj).getObjects();
  82
  83                         while (e.hasMoreElements())
  84                         {
  85                             out.writeObject(e.nextElement());
  86                         }
  87                     }
  88                     else
  89                     {
  90                         throw new RuntimeException("not implemented: " + obj.getClass().getName());
  91                     }
  92                 }
  93                 else
  94                 {
  95                     out.writeObject(obj);
  96                 }
  97             }
  98
  99             out.write(0x00);
 100             out.write(0x00);
 101         }
 102         else
 103         {
 104             super.encode(out);
 105         }
 106     }
 107 }