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      1 package org.bouncycastle.asn1;
      2 
      3 import java.io.ByteArrayOutputStream;
      4 import java.io.IOException;
      5 
      6 /**
      7  * Base class for an application specific object
      8  */
      9 public class DERApplicationSpecific
     10     extends DERObject
     11 {
     12     private int       tag;
     13     private byte[]    octets;
     14 
     15     public DERApplicationSpecific(
     16         int        tag,
     17         byte[]    octets)
     18     {
     19         this.tag = tag;
     20         this.octets = octets;
     21     }
     22 
     23     public DERApplicationSpecific(
     24         int                  tag,
     25         DEREncodable         object)
     26         throws IOException
     27     {
     28         this.tag = tag | DERTags.CONSTRUCTED;
     29 
     30         ByteArrayOutputStream baos = new ByteArrayOutputStream();
     31         DEROutputStream dos = new DEROutputStream(baos);
     32 
     33         dos.writeObject(object);
     34 
     35         this.octets = baos.toByteArray();
     36     }
     37 
     38     public boolean isConstructed()
     39     {
     40         return (tag & DERTags.CONSTRUCTED) != 0;
     41     }
     42 
     43     public byte[] getContents()
     44     {
     45         return octets;
     46     }
     47 
     48     public int getApplicationTag()
     49     {
     50         return tag & 0x1F;
     51     }
     52 
     53     public DERObject getObject()
     54         throws IOException
     55     {
     56         return new ASN1InputStream(getContents()).readObject();
     57     }
     58 
     59     /* (non-Javadoc)
     60      * @see org.bouncycastle.asn1.DERObject#encode(org.bouncycastle.asn1.DEROutputStream)
     61      */
     62     void encode(DEROutputStream out) throws IOException
     63     {
     64         out.writeEncoded(DERTags.APPLICATION | tag, octets);
     65     }
     66 
     67     public boolean equals(
     68             Object o)
     69     {
     70         if ((o == null) || !(o instanceof DERApplicationSpecific))
     71         {
     72             return false;
     73         }
     74 
     75         DERApplicationSpecific other = (DERApplicationSpecific)o;
     76 
     77         if (tag != other.tag)
     78         {
     79             return false;
     80         }
     81 
     82         if (octets.length != other.octets.length)
     83         {
     84             return false;
     85         }
     86 
     87         for (int i = 0; i < octets.length; i++)
     88         {
     89             if (octets[i] != other.octets[i])
     90             {
     91                 return false;
     92             }
     93         }
     94 
     95         return true;
     96     }
     97 
     98     public int hashCode()
     99     {
    100         byte[]  b = this.getContents();
    101         int     value = 0;
    102 
    103         for (int i = 0; i != b.length; i++)
    104         {
    105             value ^= (b[i] & 0xff) << (i % 4);
    106         }
    107 
    108         return value ^ this.getApplicationTag();
    109     }
    110 }
    111