package org.bouncycastle.asn1.x9;
import java.util.Enumeration;
import org.bouncycastle.asn1.ASN1EncodableVector;
import org.bouncycastle.asn1.ASN1OctetString;
import org.bouncycastle.asn1.ASN1Sequence;
import org.bouncycastle.asn1.DEREncodable;
import org.bouncycastle.asn1.DERObject;
import org.bouncycastle.asn1.DERObjectIdentifier;
import org.bouncycastle.asn1.DERSequence;
/**
* ASN.1 def for Diffie-Hellman key exchange KeySpecificInfo structure. See
* RFC 2631, or X9.42, for further details.
*/
public class KeySpecificInfo
implements DEREncodable
{
private DERObjectIdentifier algorithm;
private ASN1OctetString counter;
public KeySpecificInfo(
DERObjectIdentifier algorithm,
ASN1OctetString counter)
{
this.algorithm = algorithm;
this.counter = counter;
}
public KeySpecificInfo(
ASN1Sequence seq)
{
Enumeration e = seq.getObjects();
algorithm = (DERObjectIdentifier)e.nextElement();
counter = (ASN1OctetString)e.nextElement();
}
public DERObjectIdentifier getAlgorithm()
{
return algorithm;
}
public ASN1OctetString getCounter()
{
return counter;
}
/**
* Produce an object suitable for an ASN1OutputStream.
* <pre>
* KeySpecificInfo ::= SEQUENCE {
* algorithm OBJECT IDENTIFIER,
* counter OCTET STRING SIZE (4..4)
* }
* </pre>
*/
public DERObject getDERObject()
{
ASN1EncodableVector v = new ASN1EncodableVector();
v.add(algorithm);
v.add(counter);
return new DERSequence(v);
}
}