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package org.spongycastle.asn1.cms.ecc;
import org.spongycastle.asn1.ASN1EncodableVector;
import org.spongycastle.asn1.ASN1Object;
import org.spongycastle.asn1.ASN1OctetString;
import org.spongycastle.asn1.ASN1Primitive;
import org.spongycastle.asn1.ASN1Sequence;
import org.spongycastle.asn1.ASN1TaggedObject;
import org.spongycastle.asn1.DERSequence;
import org.spongycastle.asn1.DERTaggedObject;
import org.spongycastle.asn1.cms.OriginatorPublicKey;
/**
* <a href="http://tools.ietf.org/html/rfc5753">RFC 5753/3278</a>: MQVuserKeyingMaterial object.
* <pre>
* MQVuserKeyingMaterial ::= SEQUENCE {
* ephemeralPublicKey OriginatorPublicKey,
* addedukm [0] EXPLICIT UserKeyingMaterial OPTIONAL }
* </pre>
*/
public class MQVuserKeyingMaterial
extends ASN1Object
{
private OriginatorPublicKey ephemeralPublicKey;
private ASN1OctetString addedukm;
public MQVuserKeyingMaterial(
OriginatorPublicKey ephemeralPublicKey,
ASN1OctetString addedukm)
{
// TODO Check ephemeralPublicKey not null
this.ephemeralPublicKey = ephemeralPublicKey;
this.addedukm = addedukm;
}
private MQVuserKeyingMaterial(
ASN1Sequence seq)
{
// TODO Check seq has either 1 or 2 elements
this.ephemeralPublicKey = OriginatorPublicKey.getInstance(
seq.getObjectAt(0));
if (seq.size() > 1)
{
this.addedukm = ASN1OctetString.getInstance(
(ASN1TaggedObject)seq.getObjectAt(1), true);
}
}
/**
* Return an MQVuserKeyingMaterial 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.
* @throws IllegalArgumentException if the object held by the
* tagged object cannot be converted.
*/
public static MQVuserKeyingMaterial getInstance(
ASN1TaggedObject obj,
boolean explicit)
{
return getInstance(ASN1Sequence.getInstance(obj, explicit));
}
/**
* Return an MQVuserKeyingMaterial object from the given object.
* <p>
* Accepted inputs:
* <ul>
* <li> null → null
* <li> {@link MQVuserKeyingMaterial} object
* <li> {@link org.spongycastle.asn1.ASN1Sequence ASN1Sequence} with MQVuserKeyingMaterial inside it.
* </ul>
*
* @param obj the object we want converted.
* @throws IllegalArgumentException if the object cannot be converted.
*/
public static MQVuserKeyingMaterial getInstance(
Object obj)
{
if (obj == null || obj instanceof MQVuserKeyingMaterial)
{
return (MQVuserKeyingMaterial)obj;
}
if (obj instanceof ASN1Sequence)
{
return new MQVuserKeyingMaterial((ASN1Sequence)obj);
}
throw new IllegalArgumentException("Invalid MQVuserKeyingMaterial: " + obj.getClass().getName());
}
public OriginatorPublicKey getEphemeralPublicKey()
{
return ephemeralPublicKey;
}
public ASN1OctetString getAddedukm()
{
return addedukm;
}
/**
* Produce an object suitable for an ASN1OutputStream.
*/
public ASN1Primitive toASN1Primitive()
{
ASN1EncodableVector v = new ASN1EncodableVector();
v.add(ephemeralPublicKey);
if (addedukm != null)
{
v.add(new DERTaggedObject(true, 0, addedukm));
}
return new DERSequence(v);
}
}
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