org.bouncycastle.asn1.cms.OtherKeyAttribute 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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package org.bouncycastle.asn1.cms;

import org.bouncycastle.asn1.ASN1Encodable;
import org.bouncycastle.asn1.ASN1EncodableVector;
import org.bouncycastle.asn1.ASN1Object;
import org.bouncycastle.asn1.ASN1ObjectIdentifier;
import org.bouncycastle.asn1.ASN1Primitive;
import org.bouncycastle.asn1.ASN1Sequence;
import org.bouncycastle.asn1.DERSequence;

/**
 * RFC 5652: OtherKeyAttribute object.
 * 
 * 
 * OtherKeyAttribute ::= SEQUENCE {
 *     keyAttrId OBJECT IDENTIFIER,
 *     keyAttr ANY DEFINED BY keyAttrId OPTIONAL
 * }
 * 
 */
public class OtherKeyAttribute
    extends ASN1Object
{
    private ASN1ObjectIdentifier keyAttrId;
    private ASN1Encodable        keyAttr;

    /**
     * Return an OtherKeyAttribute object from the given object.
     * 
     * Accepted inputs:
     * 

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

        return null;
    }

    private OtherKeyAttribute(
        ASN1Sequence seq)
    {
        keyAttrId = (ASN1ObjectIdentifier)seq.getObjectAt(0);

        if (seq.size() > 1)
        {
            keyAttr = seq.getObjectAt(1);
        }
    }

    public OtherKeyAttribute(
        ASN1ObjectIdentifier keyAttrId,
        ASN1Encodable        keyAttr)
    {
        this.keyAttrId = keyAttrId;
        this.keyAttr = keyAttr;
    }

    public ASN1ObjectIdentifier getKeyAttrId()
    {
        return keyAttrId;
    }
    
    public ASN1Encodable getKeyAttr()
    {
        return keyAttr;
    }

    /** 
     * Produce an object suitable for an ASN1OutputStream.
     */
    public ASN1Primitive toASN1Primitive()
    {
        ASN1EncodableVector v = new ASN1EncodableVector(2);

        v.add(keyAttrId);

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

        return new DERSequence(v);
    }
}