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using System;
using System.Collections;
using Org.BouncyCastle.Math;
using Org.BouncyCastle.Utilities;
namespace Org.BouncyCastle.Asn1.CryptoPro
{
public class Gost3410ParamSetParameters
: Asn1Encodable
{
private readonly int keySize;
private readonly DerInteger p, q, a;
public static Gost3410ParamSetParameters GetInstance(
Asn1TaggedObject obj,
bool explicitly)
{
return GetInstance(Asn1Sequence.GetInstance(obj, explicitly));
}
public static Gost3410ParamSetParameters GetInstance(
object obj)
{
if (obj == null || obj is Gost3410ParamSetParameters)
{
return (Gost3410ParamSetParameters) obj;
}
if (obj is Asn1Sequence)
{
return new Gost3410ParamSetParameters((Asn1Sequence) obj);
}
throw new ArgumentException("Invalid GOST3410Parameter: " + Platform.GetTypeName(obj));
}
public Gost3410ParamSetParameters(
int keySize,
BigInteger p,
BigInteger q,
BigInteger a)
{
this.keySize = keySize;
this.p = new DerInteger(p);
this.q = new DerInteger(q);
this.a = new DerInteger(a);
}
private Gost3410ParamSetParameters(
Asn1Sequence seq)
{
if (seq.Count != 4)
throw new ArgumentException("Wrong number of elements in sequence", "seq");
this.keySize = DerInteger.GetInstance(seq[0]).Value.IntValue;
this.p = DerInteger.GetInstance(seq[1]);
this.q = DerInteger.GetInstance(seq[2]);
this.a = DerInteger.GetInstance(seq[3]);
}
public int KeySize
{
get { return keySize; }
}
public BigInteger P
{
get { return p.PositiveValue; }
}
public BigInteger Q
{
get { return q.PositiveValue; }
}
public BigInteger A
{
get { return a.PositiveValue; }
}
public override Asn1Object ToAsn1Object()
{
return new DerSequence(new DerInteger(keySize), p, q, a);
}
}
}
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