using System;
using Org.BouncyCastle.Asn1;
using Org.BouncyCastle.Asn1.CryptoPro;

namespace Org.BouncyCastle.Crypto.Parameters;

public abstract class Gost3410KeyParameters : AsymmetricKeyParameter
{
	private readonly Gost3410Parameters parameters;

	private readonly DerObjectIdentifier publicKeyParamSet;

	public Gost3410Parameters Parameters => parameters;

	public DerObjectIdentifier PublicKeyParamSet => publicKeyParamSet;

	protected Gost3410KeyParameters(bool isPrivate, Gost3410Parameters parameters)
		: base(isPrivate)
	{
		this.parameters = parameters;
	}

	protected Gost3410KeyParameters(bool isPrivate, DerObjectIdentifier publicKeyParamSet)
		: base(isPrivate)
	{
		parameters = LookupParameters(publicKeyParamSet);
		this.publicKeyParamSet = publicKeyParamSet;
	}

	private static Gost3410Parameters LookupParameters(DerObjectIdentifier publicKeyParamSet)
	{
		if (publicKeyParamSet == null)
		{
			throw new ArgumentNullException("publicKeyParamSet");
		}
		Gost3410ParamSetParameters byOid = Gost3410NamedParameters.GetByOid(publicKeyParamSet);
		if (byOid == null)
		{
			throw new ArgumentException("OID is not a valid CryptoPro public key parameter set", "publicKeyParamSet");
		}
		return new Gost3410Parameters(byOid.P, byOid.Q, byOid.A);
	}
}