dsa.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/dsa.hxx>
#include <StormByte/crypto/signer/generic.hxx>
 
#include <string_view>
 
namespace StormByte {
    namespace Crypto {
        namespace Signer {
            class STORMBYTE_CRYPTO_PUBLIC DSA final: public Generic {
                public:
                    inline DSA(KeyPair::Generic::PointerType keypair):
                        Generic(Type::DSA, keypair) {}
 
                    inline DSA(const KeyPair::DSA& keypair):
                        Generic(Type::DSA, keypair) {}
 
                    inline DSA(KeyPair::DSA&& keypair):
                        Generic(Type::DSA, keypair) {}
 
                    DSA(const DSA& other) = default;
 
                    DSA(DSA&& other) noexcept = default;
 
                    ~DSA() noexcept;
 
                    DSA& operator=(const DSA& other) = default;
 
                    DSA& operator=(DSA&& other) noexcept = default;
                    PointerType Clone() const noexcept override {
                        return DSA::MakePointer<DSA>(*this);
                    }
 
                    PointerType Move() noexcept override {
                        return DSA::MakePointer<DSA>(std::move(*this));
                    }
 
                private:
                    bool DoSign(std::span<const std::byte> input, Buffer::WriteOnly& output) const noexcept override;
 
                    Buffer::Consumer DoSign(Buffer::Consumer consumer, ReadMode mode) const noexcept override;
 
                    bool DoVerify(std::span<const std::byte> input, std::string_view signature) const noexcept override;
 
                    bool DoVerify(Buffer::Consumer consumer, std::string_view signature, ReadMode mode) const noexcept override;
            };
        }
    }
}