| package org.bouncycastle.asn1.x509; |
| |
| import java.math.BigInteger; |
| import java.util.Enumeration; |
| |
| import org.bouncycastle.asn1.ASN1EncodableVector; |
| import org.bouncycastle.asn1.ASN1Integer; |
| import org.bouncycastle.asn1.ASN1Object; |
| import org.bouncycastle.asn1.ASN1Primitive; |
| import org.bouncycastle.asn1.ASN1Sequence; |
| import org.bouncycastle.asn1.ASN1TaggedObject; |
| import org.bouncycastle.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 == 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 ASN1Integer(p); |
| this.q = new ASN1Integer(q); |
| this.g = new ASN1Integer(g); |
| } |
| |
| public 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); |
| } |
| } |