org.bouncycastle.asn1.cms.KeyAgreeRecipientIdentifier Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of bcprov-debug-jdk14 Show documentation

The Bouncy Castle Crypto package is a Java implementation of cryptographic algorithms. This jar contains JCE provider and lightweight API for the Bouncy Castle Cryptography APIs for JDK 1.4.

There is a newer version: 1.79

Show newest version

package org.bouncycastle.asn1.cms;

import org.bouncycastle.asn1.ASN1Choice;
import org.bouncycastle.asn1.ASN1Object;
import org.bouncycastle.asn1.ASN1Primitive;
import org.bouncycastle.asn1.ASN1Sequence;
import org.bouncycastle.asn1.ASN1TaggedObject;
import org.bouncycastle.asn1.DERTaggedObject;

/**
 * RFC 5652:
 * Content encryption key delivery mechanisms.
 * 
 *  
 * KeyAgreeRecipientIdentifier ::= CHOICE {
 *     issuerAndSerialNumber IssuerAndSerialNumber,
 *     rKeyId [0] IMPLICIT RecipientKeyIdentifier }
 *


 */
public class KeyAgreeRecipientIdentifier
    extends ASN1Object
    implements ASN1Choice
{
    private IssuerAndSerialNumber issuerSerial;
    private RecipientKeyIdentifier rKeyID;

    /**
     * Return an KeyAgreeRecipientIdentifier object from a tagged object.
     *
     * @param obj the tagged object holding the object we want.
     * @param explicit true if the object is meant to be explicitly
     *              tagged false otherwise.
     * @exception IllegalArgumentException if the object held by the
     *          tagged object cannot be converted.
     */
    public static KeyAgreeRecipientIdentifier getInstance(
        ASN1TaggedObject    obj,
        boolean             explicit)
    {
        return getInstance(ASN1Sequence.getInstance(obj, explicit));
    }
    
    /**
     * Return an KeyAgreeRecipientIdentifier object from the given object.
     * 
     * Accepted inputs:
     *  
     *   {@link KeyAgreeRecipientIdentifier} object
     *   {@link org.bouncycastle.asn1.ASN1Sequence#getInstance(java.lang.Object) ASN1Sequence} input formats with IssuerAndSerialNumber structure inside
     *   {@link org.bouncycastle.asn1.ASN1TaggedObject#getInstance(java.lang.Object) ASN1TaggedObject} with tag value 0: a KeyAgreeRecipientIdentifier data structure
     * 
     *

* Note: no byte[] input! * * @param obj the object we want converted. * @exception IllegalArgumentException if the object cannot be converted. */ public static KeyAgreeRecipientIdentifier getInstance( Object obj) { if (obj == null || obj instanceof KeyAgreeRecipientIdentifier) { return (KeyAgreeRecipientIdentifier)obj; } if (obj instanceof ASN1Sequence) { return new KeyAgreeRecipientIdentifier(IssuerAndSerialNumber.getInstance(obj)); } if (obj instanceof ASN1TaggedObject && ((ASN1TaggedObject)obj).getTagNo() == 0) { return new KeyAgreeRecipientIdentifier(RecipientKeyIdentifier.getInstance( (ASN1TaggedObject)obj, false)); } throw new IllegalArgumentException("Invalid KeyAgreeRecipientIdentifier: " + obj.getClass().getName()); } public KeyAgreeRecipientIdentifier( IssuerAndSerialNumber issuerSerial) { this.issuerSerial = issuerSerial; this.rKeyID = null; } public KeyAgreeRecipientIdentifier( RecipientKeyIdentifier rKeyID) { this.issuerSerial = null; this.rKeyID = rKeyID; } public IssuerAndSerialNumber getIssuerAndSerialNumber() { return issuerSerial; } public RecipientKeyIdentifier getRKeyID() { return rKeyID; } /** * Produce an object suitable for an ASN1OutputStream. */ public ASN1Primitive toASN1Primitive() { if (issuerSerial != null) { return issuerSerial.toASN1Primitive(); } return new DERTaggedObject(false, 0, rKeyID); } }