| package org.bouncycastle.asn1.pkcs; |
| |
| import java.math.BigInteger; |
| import java.util.Enumeration; |
| |
| import org.bouncycastle.asn1.ASN1Encodable; |
| import org.bouncycastle.asn1.ASN1EncodableVector; |
| import org.bouncycastle.asn1.ASN1Sequence; |
| import org.bouncycastle.asn1.DERInteger; |
| import org.bouncycastle.asn1.DERObject; |
| import org.bouncycastle.asn1.DERSequence; |
| |
| public class DHParameter |
| extends ASN1Encodable |
| { |
| DERInteger p, g, l; |
| |
| public DHParameter( |
| BigInteger p, |
| BigInteger g, |
| int l) |
| { |
| this.p = new DERInteger(p); |
| this.g = new DERInteger(g); |
| |
| if (l != 0) |
| { |
| this.l = new DERInteger(l); |
| } |
| else |
| { |
| this.l = null; |
| } |
| } |
| |
| public DHParameter( |
| ASN1Sequence seq) |
| { |
| Enumeration e = seq.getObjects(); |
| |
| p = (DERInteger)e.nextElement(); |
| g = (DERInteger)e.nextElement(); |
| |
| if (e.hasMoreElements()) |
| { |
| l = (DERInteger)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 DERObject toASN1Object() |
| { |
| ASN1EncodableVector v = new ASN1EncodableVector(); |
| |
| v.add(p); |
| v.add(g); |
| |
| if (this.getL() != null) |
| { |
| v.add(l); |
| } |
| |
| return new DERSequence(v); |
| } |
| } |