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

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The Bouncy Castle Java APIs for ASN.1 extension and utility APIs used to support bcpkix and bctls with the BC FIPS provider. The APIs may also be used with other providers although if being used in a FIPS context it is the responsibility of the user to ensure that any other providers used are FIPS certified and used appropriately.

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/******    DO NOT EDIT THIS CLASS bc-java SOURCE FILE     ******/
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package org.bouncycastle.asn1.cms;

import org.bouncycastle.asn1.ASN1Choice;
import org.bouncycastle.asn1.ASN1Encodable;
import org.bouncycastle.asn1.ASN1Object;
import org.bouncycastle.asn1.ASN1OctetString;
import org.bouncycastle.asn1.ASN1Primitive;
import org.bouncycastle.asn1.ASN1TaggedObject;
import org.bouncycastle.asn1.DERTaggedObject;

/**
 * RFC 5652:
 * Content encryption key delivery mechanisms.
 *  * RecipientIdentifier ::= CHOICE {
 *     issuerAndSerialNumber IssuerAndSerialNumber,
 *     subjectKeyIdentifier [0] SubjectKeyIdentifier 
 * }
 *
 * SubjectKeyIdentifier ::= OCTET STRING
 * 
 */
public class RecipientIdentifier
    extends ASN1Object
    implements ASN1Choice
{
    private ASN1Encodable id;
    
    public RecipientIdentifier(
        IssuerAndSerialNumber id)
    {
        this.id = id;
    }
    
    public RecipientIdentifier(
        ASN1OctetString id)
    {
        this.id = new DERTaggedObject(false, 0, id);
    }
    
    public RecipientIdentifier(
        ASN1Primitive id)
    {
        this.id = id;
    }
    
    /**
     * Return a RecipientIdentifier object from the given object.
     * 
     * Accepted inputs:
     * 

     *  null → null
     * 
 {@link RecipientIdentifier} object
     * 
 {@link IssuerAndSerialNumber} object
     * 
 {@link org.bouncycastle.asn1.ASN1OctetString#getInstance(java.lang.Object) ASN1OctetString} input formats (OctetString, byte[]) with value of KeyIdentifier in DER form
     * 
 {@link org.bouncycastle.asn1.ASN1Primitive ASN1Primitive} for RecipientIdentifier constructor
     * 
     *
     * @param o the object we want converted.
     * @exception IllegalArgumentException if the object cannot be converted.
     */
    public static RecipientIdentifier getInstance(
        Object o)
    {
        if (o == null || o instanceof RecipientIdentifier)
        {
            return (RecipientIdentifier)o;
        }
        
        if (o instanceof IssuerAndSerialNumber)
        {
            return new RecipientIdentifier((IssuerAndSerialNumber)o);
        }
        
        if (o instanceof ASN1OctetString)
        {
            return new RecipientIdentifier((ASN1OctetString)o);
        }
        
        if (o instanceof ASN1Primitive)
        {
            return new RecipientIdentifier((ASN1Primitive)o);
        }
        
        throw new IllegalArgumentException(
          "Illegal object in RecipientIdentifier: " + o.getClass().getName());
    } 

    public boolean isTagged()
    {
        return (id instanceof ASN1TaggedObject);
    }

    public ASN1Encodable getId()
    {
        if (id instanceof ASN1TaggedObject)
        {
            return ASN1OctetString.getInstance((ASN1TaggedObject)id, false);
        }

        return IssuerAndSerialNumber.getInstance(id);
    }

    /** 
     * Produce an object suitable for an ASN1OutputStream.
     */
    public ASN1Primitive toASN1Primitive()
    {
        return id.toASN1Primitive();
    }
}