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output/Libraries/BouncyCastle.Crypto/Org/BouncyCastle/Crypto/Parameters/Gost3410KeyParameters.cs

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+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);
+	}
+}