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package org.spongycastle.asn1.x509;
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.ASN1TaggedObject;
import org.spongycastle.asn1.DERSequence;
public class DSAParameter
extends ASN1Object
{
ASN1Integer p, q, g;
public static DSAParameter getInstance(
ASN1TaggedObject obj,
boolean explicit)
{
return getInstance(ASN1Sequence.getInstance(obj, explicit));
}
public static DSAParameter getInstance(
Object obj)
{
if (obj instanceof DSAParameter)
{
return (DSAParameter)obj;
}
if(obj != null)
{
return new DSAParameter(ASN1Sequence.getInstance(obj));
}
return null;
}
public DSAParameter(
BigInteger p,
BigInteger q,
BigInteger g)
{
this.p = new ASN1Integer(p);
this.q = new ASN1Integer(q);
this.g = new ASN1Integer(g);
}
private DSAParameter(
ASN1Sequence seq)
{
if (seq.size() != 3)
{
throw new IllegalArgumentException("Bad sequence size: " + seq.size());
}
Enumeration e = seq.getObjects();
p = ASN1Integer.getInstance(e.nextElement());
q = ASN1Integer.getInstance(e.nextElement());
g = ASN1Integer.getInstance(e.nextElement());
}
public BigInteger getP()
{
return p.getPositiveValue();
}
public BigInteger getQ()
{
return q.getPositiveValue();
}
public BigInteger getG()
{
return g.getPositiveValue();
}
public ASN1Primitive toASN1Primitive()
{
ASN1EncodableVector v = new ASN1EncodableVector();
v.add(p);
v.add(q);
v.add(g);
return new DERSequence(v);
}
}
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