53 regels
1.7 KiB
C++
53 regels
1.7 KiB
C++
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/* Copyright (c) 2018 Albert S.
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in all
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copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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SOFTWARE.
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*/
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#include <sstream>
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#include <exception>
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#include <memory>
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#include "random.h"
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#include "logger.h"
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Random::Random()
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{
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}
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std::string Random::getRandomHexString(unsigned int bytes)
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{
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std::stringstream stream;
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auto buffer = std::make_unique<char[]>(bytes);
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int r = getrandom(buffer.get(), bytes, GRND_NONBLOCK);
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if(r != -1 && (size_t)r == bytes)
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{
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for(size_t i = 0; i < bytes; i++)
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{
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unsigned char c = (unsigned char)buffer[i];
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stream << std::hex << (unsigned int)c;
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}
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return stream.str();
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}
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else
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{
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Logger::error() << "Random generator failed to get bytes: " + std::to_string(r);
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throw std::runtime_error("Random generator failed");
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}
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}
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