package org.bouncycastle.asn1.cms;
import org.bouncycastle.asn1.ASN1EncodableVector;
import org.bouncycastle.asn1.ASN1Object;
import org.bouncycastle.asn1.ASN1ObjectIdentifier;
import org.bouncycastle.asn1.ASN1OctetString;
import org.bouncycastle.asn1.ASN1Primitive;
import org.bouncycastle.asn1.ASN1Sequence;
import org.bouncycastle.asn1.ASN1TaggedObject;
import org.bouncycastle.asn1.BERSequence;
import org.bouncycastle.asn1.BERTaggedObject;
import org.bouncycastle.asn1.x509.AlgorithmIdentifier;
public class EncryptedContentInfo
extends ASN1Object
{
private ASN1ObjectIdentifier contentType;
private AlgorithmIdentifier contentEncryptionAlgorithm;
private ASN1OctetString encryptedContent;
public EncryptedContentInfo(
ASN1ObjectIdentifier contentType,
AlgorithmIdentifier contentEncryptionAlgorithm,
ASN1OctetString encryptedContent)
{
this.contentType = contentType;
this.contentEncryptionAlgorithm = contentEncryptionAlgorithm;
this.encryptedContent = encryptedContent;
}
private EncryptedContentInfo(
ASN1Sequence seq)
{
if (seq.size() < 2)
{
throw new IllegalArgumentException("Truncated Sequence Found");
}
contentType = (ASN1ObjectIdentifier)seq.getObjectAt(0);
contentEncryptionAlgorithm = AlgorithmIdentifier.getInstance(
seq.getObjectAt(1));
if (seq.size() > 2)
{
encryptedContent = ASN1OctetString.getInstance(
(ASN1TaggedObject)seq.getObjectAt(2), false);
}
}
/**
* return an EncryptedContentInfo object from the given object.
*
* @param obj the object we want converted.
* @exception IllegalArgumentException if the object cannot be converted.
*/
public static EncryptedContentInfo getInstance(
Object obj)
{
if (obj instanceof EncryptedContentInfo)
{
return (EncryptedContentInfo)obj;
}
if (obj != null)
{
return new EncryptedContentInfo(ASN1Sequence.getInstance(obj));
}
return null;
}
public ASN1ObjectIdentifier getContentType()
{
return contentType;
}
public AlgorithmIdentifier getContentEncryptionAlgorithm()
{
return contentEncryptionAlgorithm;
}
public ASN1OctetString getEncryptedContent()
{
return encryptedContent;
}
/**
* Produce an object suitable for an ASN1OutputStream.
* <pre>
* EncryptedContentInfo ::= SEQUENCE {
* contentType ContentType,
* contentEncryptionAlgorithm ContentEncryptionAlgorithmIdentifier,
* encryptedContent [0] IMPLICIT EncryptedContent OPTIONAL
* }
* </pre>
*/
public ASN1Primitive toASN1Primitive()
{
ASN1EncodableVector v = new ASN1EncodableVector();
v.add(contentType);
v.add(contentEncryptionAlgorithm);
if (encryptedContent != null)
{
v.add(new BERTaggedObject(false, 0, encryptedContent));
}
return new BERSequence(v);
}
}