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/*
* /dev/random EntropySource
* (C) 1999-2009 Jack Lloyd
*
* Distributed under the terms of the Botan license
*/
#ifndef BOTAN_ENTROPY_SRC_DEVICE_H__
#define BOTAN_ENTROPY_SRC_DEVICE_H__
#include <botan/entropy_src.h>
#include <vector>
#include <string>
namespace Botan {
/**
* Entropy source reading from kernel devices like /dev/random
*/
class Device_EntropySource : public EntropySource
{
public:
std::string name() const { return "RNG Device Reader"; }
void poll(Entropy_Accumulator& accum);
Device_EntropySource(const std::vector<std::string>& fsnames);
~Device_EntropySource();
private:
/**
A class handling reading from a Unix character device
*/
class Device_Reader
{
public:
typedef int fd_type;
// Does not own fd, a transient class
Device_Reader(fd_type device_fd) : fd(device_fd) {}
void close();
u32bit get(byte out[], u32bit length, u32bit ms_wait_time);
static fd_type open(const std::string& pathname);
private:
fd_type fd;
};
std::vector<Device_Reader> devices;
};
}
#endif
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