using Org.BouncyCastle.Crypto.Parameters; using System; namespace Org.BouncyCastle.Crypto.Agreement { public sealed class X448Agreement : IRawAgreement { private X448PrivateKeyParameters m_privateKey; public int AgreementSize => X448PrivateKeyParameters.SecretSize; public void Init(ICipherParameters parameters) { m_privateKey = (X448PrivateKeyParameters)parameters; } public void CalculateAgreement(ICipherParameters publicKey, byte[] buf, int off) { CalculateAgreement(publicKey, buf.AsSpan(off)); } public void CalculateAgreement(ICipherParameters publicKey, Span<byte> buf) { m_privateKey.GenerateSecret((X448PublicKeyParameters)publicKey, buf); } } }