org.bouncycastle.asn1.cms.RecipientKeyIdentifier 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.ASN1EncodableVector;
import org.bouncycastle.asn1.ASN1GeneralizedTime;
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.DEROctetString;
import org.bouncycastle.asn1.DERSequence;

/**
 * RFC 5652:
 * Content encryption key delivery mechanisms.
 * 
 * 
 * RecipientKeyIdentifier ::= SEQUENCE {
 *     subjectKeyIdentifier SubjectKeyIdentifier,
 *     date GeneralizedTime OPTIONAL,
 *     other OtherKeyAttribute OPTIONAL 
 * }
 *
 * SubjectKeyIdentifier ::= OCTET STRING
 * 
 */
public class RecipientKeyIdentifier
    extends ASN1Object
{
    private ASN1OctetString      subjectKeyIdentifier;
    private ASN1GeneralizedTime  date;
    private OtherKeyAttribute    other;

    public RecipientKeyIdentifier(
        ASN1OctetString         subjectKeyIdentifier,
        ASN1GeneralizedTime     date,
        OtherKeyAttribute       other)
    {
        this.subjectKeyIdentifier = subjectKeyIdentifier;
        this.date = date;
        this.other = other;
    }

    public RecipientKeyIdentifier(
        byte[]                  subjectKeyIdentifier,
        ASN1GeneralizedTime     date,
        OtherKeyAttribute       other)
    {
        this.subjectKeyIdentifier = new DEROctetString(subjectKeyIdentifier);
        this.date = date;
        this.other = other;
    }

    public RecipientKeyIdentifier(
        byte[]         subjectKeyIdentifier)
    {
        this(subjectKeyIdentifier, null, null);
    }

    private RecipientKeyIdentifier(
        ASN1Sequence seq)
    {
        subjectKeyIdentifier = ASN1OctetString.getInstance(
                                                    seq.getObjectAt(0));
        
        switch(seq.size())
        {
        case 1:
            break;
        case 2:
            if (seq.getObjectAt(1) instanceof ASN1GeneralizedTime)
            {
                date = ASN1GeneralizedTime.getInstance(seq.getObjectAt(1));
            }
            else
            {
                other = OtherKeyAttribute.getInstance(seq.getObjectAt(2));
            }
            break;
        case 3:
            date  = ASN1GeneralizedTime.getInstance(seq.getObjectAt(1));
            other = OtherKeyAttribute.getInstance(seq.getObjectAt(2));
            break;
        default:
            throw new IllegalArgumentException("Invalid RecipientKeyIdentifier");
        }
    }

    /**
     * Return a RecipientKeyIdentifier object from a tagged object.
     *
     * @param ato the tagged object holding the object we want.
     * @param isExplicit 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 RecipientKeyIdentifier getInstance(ASN1TaggedObject ato, boolean isExplicit)
    {
        return getInstance(ASN1Sequence.getInstance(ato, isExplicit));
    }
    
    /**
     * Return a RecipientKeyIdentifier object from the given object.
     * 
     * Accepted inputs:
     * 

     *  null → null
     * 
 {@link RecipientKeyIdentifier} object
     * 
 {@link org.bouncycastle.asn1.ASN1Sequence#getInstance(java.lang.Object) ASN1Sequence} input formats with RecipientKeyIdentifier structure inside
     * 
     *
     * @param obj the object we want converted.
     * @exception IllegalArgumentException if the object cannot be converted.
     */
    public static RecipientKeyIdentifier getInstance(Object obj)
    {
        if (obj instanceof RecipientKeyIdentifier)
        {
            return (RecipientKeyIdentifier)obj;
        }
        
        if(obj != null)
        {
            return new RecipientKeyIdentifier(ASN1Sequence.getInstance(obj));
        }
        
        return null;
    } 

    public ASN1OctetString getSubjectKeyIdentifier()
    {
        return subjectKeyIdentifier;
    }

    public ASN1GeneralizedTime getDate()
    {
        return date;
    }

    public OtherKeyAttribute getOtherKeyAttribute()
    {
        return other;
    }


    /** 
     * Produce an object suitable for an ASN1OutputStream.
     */
    public ASN1Primitive toASN1Primitive()
    {
        ASN1EncodableVector  v = new ASN1EncodableVector();

        v.add(subjectKeyIdentifier);
        
        if (date != null)
        {
            v.add(date);
        }

        if (other != null)
        {
            v.add(other);
        }
        
        return new DERSequence(v);
    }
}