142 lines
3.2 KiB
C++
142 lines
3.2 KiB
C++
#ifndef FORTUNA_FORTUNA_H
|
|
#define FORTUNA_FORTUNA_H
|
|
|
|
#include "accumulator.h"
|
|
#include "generator.h"
|
|
#include "pool.h"
|
|
|
|
#include <fmt/core.h>
|
|
|
|
#include <array>
|
|
#include <chrono>
|
|
#include <memory>
|
|
#include <mutex>
|
|
#include <thread>
|
|
|
|
namespace fortuna {
|
|
|
|
class Fortuna {
|
|
public:
|
|
static constexpr const char NUM_OF_POOLS{32};
|
|
std::mutex mtx;
|
|
std::mutex mtx_random_data;
|
|
std::mutex accu_mtx;
|
|
std::mutex print_mtx;
|
|
std::thread th_gen;
|
|
std::thread th_accu;
|
|
std::thread th_sfm;
|
|
std::thread th_urandom;
|
|
|
|
Fortuna();
|
|
~Fortuna() noexcept;
|
|
|
|
[[optimize_for_synchronized]] auto random_data(unsigned int) -> void;
|
|
|
|
auto set_reseed_ctr_to_null() -> void {
|
|
std::lock_guard<std::mutex> lg(mtx);
|
|
Fortuna::R.null_da_ctr();
|
|
}
|
|
|
|
auto incr_reseed_ctr() -> void {
|
|
std::lock_guard<std::mutex> lg(mtx);
|
|
++Fortuna::R.reseed_ctr;
|
|
}
|
|
|
|
auto get_reseed_ctr() const -> uint64_t {
|
|
return R.reseed_ctr;
|
|
}
|
|
|
|
auto initialize_prng() -> void {
|
|
// TODO(me): handle the reseeds here as per Cryptography Engineering,
|
|
// p. 153
|
|
set_reseed_ctr_to_null();
|
|
std::unique_lock<std::mutex> p_ul(print_mtx);
|
|
std::unique_lock<std::mutex> a_ul(accu_mtx);
|
|
try {
|
|
R.initialize_pools();
|
|
fmt::print("[i] fortuna: pools initialized\n");
|
|
p_ul.unlock();
|
|
accumulator.set_pools_ptr(R._p_pools);
|
|
accumulator.set_gen(R.Gen);
|
|
a_ul.unlock();
|
|
|
|
// FIXME: bogus first reseed here, P_0 definitely hasn't collected
|
|
// enough entropy by now
|
|
incr_reseed_ctr();
|
|
|
|
p_ul.lock();
|
|
fmt::print("first reseed\n");
|
|
p_ul.unlock();
|
|
|
|
std::unique_lock<std::mutex> ul(mtx);
|
|
R.Gen.reseed("fortuna");
|
|
ul.unlock();
|
|
}
|
|
catch (std::exception& e) {
|
|
p_ul.try_lock();
|
|
fmt::print(
|
|
"{}\n[!] fortuna: fatal error, PRNG initialization FAILED!\n\n",
|
|
e.what());
|
|
}
|
|
p_ul.try_lock();
|
|
fmt::print("[*] fortuna: PRNG initialized\n");
|
|
}
|
|
|
|
auto generator_service(std::shared_ptr<fortuna::generator::Generator> Gen)
|
|
-> void;
|
|
|
|
auto accumulator_service() -> void;
|
|
|
|
auto seed_file_manager_service() -> void;
|
|
|
|
auto urandom_entropy_src_service() -> void;
|
|
|
|
// PRNG state
|
|
class R_state {
|
|
friend fortuna::Fortuna;
|
|
|
|
public:
|
|
R_state() noexcept {}
|
|
~R_state() noexcept = default;
|
|
|
|
protected:
|
|
auto null_da_ctr() -> void {
|
|
reseed_ctr = 0x00;
|
|
fmt::print("reseed_ctr set to 0x00\n");
|
|
}
|
|
|
|
auto initialize_pools() -> void {
|
|
for (unsigned int i = accumulator::Accumulator::init_pool_num;
|
|
i < Fortuna::NUM_OF_POOLS;
|
|
++i) {
|
|
this->_p_pools->at(i).initialize_pool(i);
|
|
}
|
|
}
|
|
|
|
private:
|
|
generator::Generator Gen;
|
|
uint64_t reseed_ctr{0x00};
|
|
|
|
// da_pools is to be used solely for creating a shared_ptr of the
|
|
// object: _p_pools. any further access to the structure should be
|
|
// facilitated by the subject _p_pools shared_ptr. to convey this,
|
|
// da_pools is declared const
|
|
const std::array<accumulator::Pool, Fortuna::NUM_OF_POOLS> da_pools;
|
|
|
|
// _p_pools points to the da_pools array of 32 Pool objects
|
|
std::shared_ptr<std::array<accumulator::Pool, Fortuna::NUM_OF_POOLS>>
|
|
_p_pools{std::make_shared<
|
|
std::array<accumulator::Pool, Fortuna::NUM_OF_POOLS>>()};
|
|
|
|
std::chrono::steady_clock::time_point last_reseed;
|
|
}; // class R_state
|
|
|
|
fortuna::Fortuna::R_state R;
|
|
fortuna::accumulator::Accumulator accumulator;
|
|
|
|
}; // class Fortuna
|
|
|
|
} // namespace fortuna
|
|
|
|
#endif // FORTUNA_FORTUNA_H
|