1 package org.bouncycastle.asn1.pkcs; 2 3 import java.math.BigInteger; 4 import java.util.Enumeration; 5 6 import org.bouncycastle.asn1.ASN1Encodable; 7 import org.bouncycastle.asn1.ASN1EncodableVector; 8 import org.bouncycastle.asn1.ASN1Sequence; 9 import org.bouncycastle.asn1.DERInteger; 10 import org.bouncycastle.asn1.DERObject; 11 import org.bouncycastle.asn1.DERSequence; 12 13 public class DHParameter 14 extends ASN1Encodable 15 { 16 DERInteger p, g, l; 17 18 public DHParameter( 19 BigInteger p, 20 BigInteger g, 21 int l) 22 { 23 this.p = new DERInteger(p); 24 this.g = new DERInteger(g); 25 26 if (l != 0) 27 { 28 this.l = new DERInteger(l); 29 } 30 else 31 { 32 this.l = null; 33 } 34 } 35 36 public DHParameter( 37 ASN1Sequence seq) 38 { 39 Enumeration e = seq.getObjects(); 40 41 p = (DERInteger)e.nextElement(); 42 g = (DERInteger)e.nextElement(); 43 44 if (e.hasMoreElements()) 45 { 46 l = (DERInteger)e.nextElement(); 47 } 48 else 49 { 50 l = null; 51 } 52 } 53 54 public BigInteger getP() 55 { 56 return p.getPositiveValue(); 57 } 58 59 public BigInteger getG() 60 { 61 return g.getPositiveValue(); 62 } 63 64 public BigInteger getL() 65 { 66 if (l == null) 67 { 68 return null; 69 } 70 71 return l.getPositiveValue(); 72 } 73 74 public DERObject toASN1Object() 75 { 76 ASN1EncodableVector v = new ASN1EncodableVector(); 77 78 v.add(p); 79 v.add(g); 80 81 if (this.getL() != null) 82 { 83 v.add(l); 84 } 85 86 return new DERSequence(v); 87 } 88 } 89
