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package org.spongycastle.asn1.pkcs;
import java.math.BigInteger;
import java.util.Enumeration;
import org.spongycastle.asn1.ASN1EncodableVector;
import org.spongycastle.asn1.ASN1Integer;
import org.spongycastle.asn1.ASN1Object;
import org.spongycastle.asn1.ASN1Primitive;
import org.spongycastle.asn1.ASN1Sequence;
import org.spongycastle.asn1.DERSequence;
public class DHParameter
extends ASN1Object
{
ASN1Integer p, g, l;
public DHParameter(
BigInteger p,
BigInteger g,
int l)
{
this.p = new ASN1Integer(p);
this.g = new ASN1Integer(g);
if (l != 0)
{
this.l = new ASN1Integer(l);
}
else
{
this.l = null;
}
}
public static DHParameter getInstance(
Object obj)
{
if (obj instanceof DHParameter)
{
return (DHParameter)obj;
}
if (obj != null)
{
return new DHParameter(ASN1Sequence.getInstance(obj));
}
return null;
}
private DHParameter(
ASN1Sequence seq)
{
Enumeration e = seq.getObjects();
p = ASN1Integer.getInstance(e.nextElement());
g = ASN1Integer.getInstance(e.nextElement());
if (e.hasMoreElements())
{
l = (ASN1Integer)e.nextElement();
}
else
{
l = null;
}
}
public BigInteger getP()
{
return p.getPositiveValue();
}
public BigInteger getG()
{
return g.getPositiveValue();
}
public BigInteger getL()
{
if (l == null)
{
return null;
}
return l.getPositiveValue();
}
public ASN1Primitive toASN1Primitive()
{
ASN1EncodableVector v = new ASN1EncodableVector();
v.add(p);
v.add(g);
if (this.getL() != null)
{
v.add(l);
}
return new DERSequence(v);
}
}
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