x25519.hxx

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/*
 * Copyright (C) 2024-2026 David C. Manuelda (StormBytePP)
 *
 * This file is part of StormByte-Crypto.
 *
 * StormByte-Crypto original source is dual-licensed:
 *
 * 1. GNU Lesser General Public License v3.0 (or later)
 *    You may redistribute and/or modify this file under the terms of the
 *    GNU Lesser General Public License as published by the Free Software
 *    Foundation, either version 3 of the License, or (at your option)
 *    any later version.
 *
 * 2. Commercial license
 *    Alternatively, this file may be used under the terms of a commercial
 *    license agreement with the copyright holder
 *    (David C. Manuelda <StormByte@gmail.com>).
 *
 * Both licenses apply only to original StormByte-Crypto source in this
 * repository. They do not cover other StormByte modules or any third-party
 * material shipped with this repository (including everything under
 * thirdparty/, in particular Crypto++, bundled libbzip2, the StormByte-Buffer
 * tree and the StormByte suite it vendors), which remains under its own license.
 *
 * Neither license grants any patent rights. Any patent licenses required
 * to use this software or third-party components must be obtained separately
 * from the patent holders.
 *
 * StormByte-Crypto is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * version 3 along with StormByte-Crypto. If not, see
 * <https://www.gnu.org/licenses/lgpl-3.0.html>.
 *
 * SPDX-License-Identifier: LGPL-3.0-or-later OR LicenseRef-StormByte-Commercial
 */
 
#pragma once
 
#include <StormByte/crypto/keypair/x25519.hxx>
#include <StormByte/crypto/secret/generic.hxx>
 
#include <string_view>
 
namespace StormByte {
    namespace Crypto {
        namespace Secret {
            class STORMBYTE_CRYPTO_PUBLIC X25519 final: public Generic {
                public:
                    inline explicit X25519(KeyPair::Generic::PointerType keypair) noexcept:
                        Generic(Type::X25519, std::move(keypair)) {}
 
                    X25519(const X25519& other) = default;
 
                    X25519(X25519&& other) noexcept = default;
 
                    ~X25519() noexcept;
 
                    X25519& operator=(const X25519& other) = default;
 
                    X25519& operator=(X25519&& other) noexcept = default;
                    Generic::PointerType Clone() const override {
                        return X25519::MakePointer<X25519>(*this);
                    }
 
                    Generic::PointerType Move() override {
                        return X25519::MakePointer<X25519>(std::move(*this));
                    }
 
                    std::optional<Secure::Password> Share(std::string_view peerPublicKey) const noexcept override;
 
                    static std::optional<Secure::Password> DeriveSharedSecret(
                        KeyPair::Generic::PointerType keypair,
                        std::string_view peerPublicKey) noexcept;
            };
        }
    }
}