DHDomainParameters
using Org.BouncyCastle.Utilities;
using System;
using System.Collections.Generic;
namespace Org.BouncyCastle.Asn1.X9
{
public class DHDomainParameters : Asn1Encodable
{
private readonly DerInteger p;
private readonly DerInteger g;
private readonly DerInteger q;
private readonly DerInteger j;
private readonly DHValidationParms validationParms;
public DerInteger P => p;
public DerInteger G => g;
public DerInteger Q => q;
public DerInteger J => j;
public DHValidationParms ValidationParms => validationParms;
public static DHDomainParameters GetInstance(Asn1TaggedObject obj, bool isExplicit)
{
return GetInstance(Asn1Sequence.GetInstance(obj, isExplicit));
}
public static DHDomainParameters GetInstance(object obj)
{
if (obj == null || obj is DHDomainParameters)
return (DHDomainParameters)obj;
if (obj is Asn1Sequence)
return new DHDomainParameters((Asn1Sequence)obj);
throw new ArgumentException("Invalid DHDomainParameters: " + Platform.GetTypeName(obj), "obj");
}
public DHDomainParameters(DerInteger p, DerInteger g, DerInteger q, DerInteger j, DHValidationParms validationParms)
{
if (p == null)
throw new ArgumentNullException("p");
if (g == null)
throw new ArgumentNullException("g");
if (q == null)
throw new ArgumentNullException("q");
this.p = p;
this.g = g;
this.q = q;
this.j = j;
this.validationParms = validationParms;
}
private DHDomainParameters(Asn1Sequence seq)
{
if (seq.Count < 3 || seq.Count > 5)
throw new ArgumentException("Bad sequence size: " + seq.Count.ToString(), "seq");
IEnumerator<Asn1Encodable> enumerator = seq.GetEnumerator();
p = DerInteger.GetInstance(GetNext(enumerator));
g = DerInteger.GetInstance(GetNext(enumerator));
q = DerInteger.GetInstance(GetNext(enumerator));
Asn1Encodable next = GetNext(enumerator);
if (next != null && next is DerInteger) {
j = DerInteger.GetInstance(next);
next = GetNext(enumerator);
}
if (next != null)
validationParms = DHValidationParms.GetInstance(next.ToAsn1Object());
}
private static Asn1Encodable GetNext(IEnumerator<Asn1Encodable> e)
{
if (!e.MoveNext())
return null;
return e.Current;
}
public override Asn1Object ToAsn1Object()
{
Asn1EncodableVector asn1EncodableVector = new Asn1EncodableVector(p, g, q);
asn1EncodableVector.AddOptional(j, validationParms);
return new DerSequence(asn1EncodableVector);
}
}
}