using Org.BouncyCastle.Asn1; using Org.BouncyCastle.Asn1.CryptoPro; using Org.BouncyCastle.Security; using System; namespace Org.BouncyCastle.Crypto.Parameters { public class Gost3410KeyGenerationParameters : KeyGenerationParameters { private readonly Gost3410Parameters parameters; private readonly DerObjectIdentifier publicKeyParamSet; public Gost3410Parameters Parameters => parameters; public DerObjectIdentifier PublicKeyParamSet => publicKeyParamSet; public Gost3410KeyGenerationParameters(SecureRandom random, Gost3410Parameters parameters) : base(random, parameters.P.BitLength - 1) { this.parameters = parameters; } public Gost3410KeyGenerationParameters(SecureRandom random, DerObjectIdentifier publicKeyParamSet) : this(random, 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); } } }