using Org.BouncyCastle.Crypto; using Org.BouncyCastle.Pqc.Crypto.Utilities; using Org.BouncyCastle.Security; namespace Org.BouncyCastle.Pqc.Crypto.Saber { public sealed class SaberKemGenerator : IEncapsulatedSecretGenerator { private SecureRandom sr; public SaberKemGenerator(SecureRandom random) { sr = CryptoServicesRegistrar.GetSecureRandom(random); } public ISecretWithEncapsulation GenerateEncapsulated(AsymmetricKeyParameter recipientKey) { SaberPublicKeyParameters saberPublicKeyParameters = (SaberPublicKeyParameters)recipientKey; SaberEngine engine = saberPublicKeyParameters.Parameters.Engine; byte[] array = new byte[engine.GetCipherTextSize()]; byte[] array2 = new byte[engine.GetSessionKeySize()]; engine.crypto_kem_enc(array, array2, saberPublicKeyParameters.GetPublicKey(), sr); return new SecretWithEncapsulationImpl(array2, array); } } }