package org.bouncycastle.asn1.x509; import java.math.BigInteger; import java.util.Enumeration; import org.bouncycastle.asn1.ASN1EncodableVector; import org.bouncycastle.asn1.ASN1Sequence; import org.bouncycastle.asn1.ASN1TaggedObject; import org.bouncycastle.asn1.DEREncodable; import org.bouncycastle.asn1.DERInteger; import org.bouncycastle.asn1.DERObject; import org.bouncycastle.asn1.DERSequence; public class DSAParameter implements DEREncodable { DERInteger 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 == null || obj instanceof DSAParameter) { return (DSAParameter)obj; } if(obj instanceof ASN1Sequence) { return new DSAParameter((ASN1Sequence)obj); } throw new IllegalArgumentException("Invalid DSAParameter: " + obj.getClass().getName()); } public DSAParameter( BigInteger p, BigInteger q, BigInteger g) { this.p = new DERInteger(p); this.q = new DERInteger(q); this.g = new DERInteger(g); } public DSAParameter( ASN1Sequence seq) { Enumeration e = seq.getObjects(); p = (DERInteger)e.nextElement(); q = (DERInteger)e.nextElement(); g = (DERInteger)e.nextElement(); } public BigInteger getP() { return p.getPositiveValue(); } public BigInteger getQ() { return q.getPositiveValue(); } public BigInteger getG() { return g.getPositiveValue(); } public DERObject getDERObject() { ASN1EncodableVector v = new ASN1EncodableVector(); v.add(p); v.add(q); v.add(g); return new DERSequence(v); } }