Home | History | Annotate | Download | only in pkcs 
      1 package org.bouncycastle.asn1.pkcs;
      2 
      3 import java.util.Enumeration;
      4 
      5 import org.bouncycastle.asn1.ASN1Encodable;
      6 import org.bouncycastle.asn1.ASN1EncodableVector;
      7 import org.bouncycastle.asn1.ASN1Object;
      8 import org.bouncycastle.asn1.ASN1ObjectIdentifier;
      9 import org.bouncycastle.asn1.ASN1Primitive;
     10 import org.bouncycastle.asn1.ASN1Sequence;
     11 import org.bouncycastle.asn1.ASN1TaggedObject;
     12 import org.bouncycastle.asn1.BERSequence;
     13 import org.bouncycastle.asn1.BERTaggedObject;
     14 import org.bouncycastle.asn1.DLSequence;
     15 
     16 public class ContentInfo
     17     extends ASN1Object
     18     implements PKCSObjectIdentifiers
     19 {
     20     private ASN1ObjectIdentifier contentType;
     21     private ASN1Encodable content;
     22     private boolean       isBer = true;
     23 
     24     public static ContentInfo getInstance(
     25         Object  obj)
     26     {
     27         if (obj instanceof ContentInfo)
     28         {
     29             return (ContentInfo)obj;
     30         }
     31 
     32         if (obj != null)
     33         {
     34             return new ContentInfo(ASN1Sequence.getInstance(obj));
     35         }
     36 
     37         return null;
     38     }
     39 
     40     private ContentInfo(
     41         ASN1Sequence  seq)
     42     {
     43         Enumeration   e = seq.getObjects();
     44 
     45         contentType = (ASN1ObjectIdentifier)e.nextElement();
     46 
     47         if (e.hasMoreElements())
     48         {
     49             content = ((ASN1TaggedObject)e.nextElement()).getObject();
     50         }
     51 
     52         isBer = seq instanceof BERSequence;
     53     }
     54 
     55     public ContentInfo(
     56         ASN1ObjectIdentifier contentType,
     57         ASN1Encodable content)
     58     {
     59         this.contentType = contentType;
     60         this.content = content;
     61     }
     62 
     63     public ASN1ObjectIdentifier getContentType()
     64     {
     65         return contentType;
     66     }
     67 
     68     public ASN1Encodable getContent()
     69     {
     70         return content;
     71     }
     72 
     73     /**
     74      * Produce an object suitable for an ASN1OutputStream.
     75      * <pre>
     76      * ContentInfo ::= SEQUENCE {
     77      *          contentType ContentType,
     78      *          content
     79      *          [0] EXPLICIT ANY DEFINED BY contentType OPTIONAL }
     80      * </pre>
     81      */
     82     public ASN1Primitive toASN1Primitive()
     83     {
     84         ASN1EncodableVector v = new ASN1EncodableVector();
     85 
     86         v.add(contentType);
     87 
     88         if (content != null)
     89         {
     90             v.add(new BERTaggedObject(true, 0, content));
     91         }
     92 
     93         if (isBer)
     94         {
     95             return new BERSequence(v);
     96         }
     97         else
     98         {
     99             return new DLSequence(v);
    100         }
    101     }
    102 }
    103