package org.bouncycastle.asn1.cms;
import org.bouncycastle.asn1.ASN1EncodableVector;
import org.bouncycastle.asn1.ASN1Integer;
import org.bouncycastle.asn1.ASN1Object;
import org.bouncycastle.asn1.ASN1OctetString;
import org.bouncycastle.asn1.ASN1Primitive;
import org.bouncycastle.asn1.ASN1Sequence;
import org.bouncycastle.asn1.ASN1TaggedObject;
import org.bouncycastle.asn1.DERSequence;
import org.bouncycastle.asn1.x509.AlgorithmIdentifier;
public class KeyTransRecipientInfo
extends ASN1Object
{
private ASN1Integer version;
private RecipientIdentifier rid;
private AlgorithmIdentifier keyEncryptionAlgorithm;
private ASN1OctetString encryptedKey;
public KeyTransRecipientInfo(
RecipientIdentifier rid,
AlgorithmIdentifier keyEncryptionAlgorithm,
ASN1OctetString encryptedKey)
{
if (rid.toASN1Primitive() instanceof ASN1TaggedObject)
{
this.version = new ASN1Integer(2);
}
else
{
this.version = new ASN1Integer(0);
}
this.rid = rid;
this.keyEncryptionAlgorithm = keyEncryptionAlgorithm;
this.encryptedKey = encryptedKey;
}
public KeyTransRecipientInfo(
ASN1Sequence seq)
{
this.version = (ASN1Integer)seq.getObjectAt(0);
this.rid = RecipientIdentifier.getInstance(seq.getObjectAt(1));
this.keyEncryptionAlgorithm = AlgorithmIdentifier.getInstance(seq.getObjectAt(2));
this.encryptedKey = (ASN1OctetString)seq.getObjectAt(3);
}
/**
* return a KeyTransRecipientInfo object from the given object.
*
* @param obj the object we want converted.
* @exception IllegalArgumentException if the object cannot be converted.
*/
public static KeyTransRecipientInfo getInstance(
Object obj)
{
if (obj == null || obj instanceof KeyTransRecipientInfo)
{
return (KeyTransRecipientInfo)obj;
}
if(obj instanceof ASN1Sequence)
{
return new KeyTransRecipientInfo((ASN1Sequence)obj);
}
throw new IllegalArgumentException(
"Illegal object in KeyTransRecipientInfo: " + obj.getClass().getName());
}
public ASN1Integer getVersion()
{
return version;
}
public RecipientIdentifier getRecipientIdentifier()
{
return rid;
}
public AlgorithmIdentifier getKeyEncryptionAlgorithm()
{
return keyEncryptionAlgorithm;
}
public ASN1OctetString getEncryptedKey()
{
return encryptedKey;
}
/**
* Produce an object suitable for an ASN1OutputStream.
* <pre>
* KeyTransRecipientInfo ::= SEQUENCE {
* version CMSVersion, -- always set to 0 or 2
* rid RecipientIdentifier,
* keyEncryptionAlgorithm KeyEncryptionAlgorithmIdentifier,
* encryptedKey EncryptedKey
* }
* </pre>
*/
public ASN1Primitive toASN1Primitive()
{
ASN1EncodableVector v = new ASN1EncodableVector();
v.add(version);
v.add(rid);
v.add(keyEncryptionAlgorithm);
v.add(encryptedKey);
return new DERSequence(v);
}
}