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