001 /** 002 * Licensed to the Apache Software Foundation (ASF) under one or more 003 * contributor license agreements. See the NOTICE file distributed with 004 * this work for additional information regarding copyright ownership. 005 * The ASF licenses this file to You under the Apache License, Version 2.0 006 * (the "License"); you may not use this file except in compliance with 007 * the License. You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the License for the specific language governing permissions and 015 * limitations under the License. 016 */ 017 018 package org.apache.geronimo.util.asn1.pkcs; 019 020 import java.math.BigInteger; 021 import java.util.Enumeration; 022 023 import org.apache.geronimo.util.asn1.ASN1Encodable; 024 import org.apache.geronimo.util.asn1.ASN1EncodableVector; 025 import org.apache.geronimo.util.asn1.ASN1Sequence; 026 import org.apache.geronimo.util.asn1.DERInteger; 027 import org.apache.geronimo.util.asn1.DERObject; 028 import org.apache.geronimo.util.asn1.DERSequence; 029 030 public class DHParameter 031 extends ASN1Encodable 032 { 033 DERInteger p, g, l; 034 035 public DHParameter( 036 BigInteger p, 037 BigInteger g, 038 int l) 039 { 040 this.p = new DERInteger(p); 041 this.g = new DERInteger(g); 042 043 if (l != 0) 044 { 045 this.l = new DERInteger(l); 046 } 047 else 048 { 049 this.l = null; 050 } 051 } 052 053 public DHParameter( 054 ASN1Sequence seq) 055 { 056 Enumeration e = seq.getObjects(); 057 058 p = (DERInteger)e.nextElement(); 059 g = (DERInteger)e.nextElement(); 060 061 if (e.hasMoreElements()) 062 { 063 l = (DERInteger)e.nextElement(); 064 } 065 else 066 { 067 l = null; 068 } 069 } 070 071 public BigInteger getP() 072 { 073 return p.getPositiveValue(); 074 } 075 076 public BigInteger getG() 077 { 078 return g.getPositiveValue(); 079 } 080 081 public BigInteger getL() 082 { 083 if (l == null) 084 { 085 return null; 086 } 087 088 return l.getPositiveValue(); 089 } 090 091 public DERObject toASN1Object() 092 { 093 ASN1EncodableVector v = new ASN1EncodableVector(); 094 095 v.add(p); 096 v.add(g); 097 098 if (this.getL() != null) 099 { 100 v.add(l); 101 } 102 103 return new DERSequence(v); 104 } 105 }