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/************************************************************************
*
* Copyright (C) 2021-2024 IRCAD France
*
* This file is part of Sight.
*
* Sight is free software: you can redistribute it and/or modify it 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.
*
* Sight 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 along with Sight. If not, see <https://www.gnu.org/licenses/>.
*
***********************************************************************/
#include "sha256.hpp"
#include <openssl/sha.h>
#include <array>
#include <iomanip>
#include <sstream>
namespace sight::core::crypto
{
//------------------------------------------------------------------------------
void hash(const secure_string& _message, std::array<std::uint8_t, HASH_SIZE>& _output)
{
// Compute SHA256 using openssl
SHA256(reinterpret_cast<const std::uint8_t*>(_message.data()), _message.size(), _output.data());
}
//------------------------------------------------------------------------------
secure_string hash(const secure_string& _message)
{
// The hash array
std::array<std::uint8_t, HASH_SIZE> output {};
// Compute SHA256 using openssl
hash(_message, output);
// Convert the hash to an hexadecimal string
std::ostringstream stream;
stream << std::hex << std::setfill('0');
for(int byte : output)
{
stream << std::setw(2) << byte;
}
return secure_string(stream.str());
}
} // namespace sight::core::crypto
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