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BigNum.hpp
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BigNum.hpp
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/**
* Copyright (c) 2017, Tresorit Kft.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* * Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* * Neither the name of the copyright holder nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#include <openssl/bn.h>
class BigNumCtx
{
private:
BN_CTX* ctx;
public:
BigNumCtx();
BigNumCtx(const BigNumCtx&) = delete;
BigNumCtx& operator=(const BigNumCtx&) = delete;
BigNumCtx(BigNumCtx&& other);
BigNumCtx& operator=(BigNumCtx&& other);
~BigNumCtx();
BN_CTX* get();
BIGNUM* getBigNum();
BIGNUM* getBigNum(BN_ULONG w);
class BigNumCtxGuard
{
private:
BigNumCtx* ctx;
public:
BigNumCtxGuard(const BigNumCtxGuard&) = delete;
BigNumCtxGuard& operator=(const BigNumCtxGuard&) = delete;
BigNumCtxGuard(BigNumCtxGuard&& other);
BigNumCtxGuard& operator=(BigNumCtxGuard&& other);
BigNumCtxGuard(BigNumCtx* ctx);
~BigNumCtxGuard();
};
BigNumCtxGuard getGuard();
};