7#include <botan/stateful_rng.h>
8#include <botan/internal/os_utils.h>
9#include <botan/loadstor.h>
11#if defined(BOTAN_HAS_SYSTEM_RNG)
12 #include <botan/system_rng.h>
34 return m_reseed_counter > 0;
45 reset_reseed_counter();
64 uint8_t additional_input[20] = { 0 };
68#if defined(BOTAN_HAS_SYSTEM_RNG)
80 const uint8_t input[],
size_t input_len)
89 if(max_per_request == 0)
98 const size_t this_req = std::min(max_per_request, output_len);
111 output_len -= this_req;
118 std::chrono::milliseconds poll_timeout)
126 reset_reseed_counter();
129 return bits_collected;
140 reset_reseed_counter();
144void Stateful_RNG::reset_reseed_counter()
147 m_reseed_counter = 1;
156 const bool fork_detected = (m_last_pid > 0) && (cur_pid != m_last_pid);
160 (m_reseed_interval > 0 && m_reseed_counter >= m_reseed_interval))
162 m_reseed_counter = 0;
163 m_last_pid = cur_pid;
170 if(m_entropy_sources)
178 throw Invalid_State(
"Detected use of fork but cannot reseed DRBG");
186 m_reseed_counter += 1;
#define BOTAN_ASSERT(expr, assertion_made)
virtual void reseed_from_rng(RandomNumberGenerator &rng, size_t poll_bits=BOTAN_RNG_RESEED_POLL_BITS)
virtual void randomize(uint8_t output[], size_t length)=0
virtual std::string name() const =0
virtual size_t reseed(Entropy_Sources &srcs, size_t poll_bits=BOTAN_RNG_RESEED_POLL_BITS, std::chrono::milliseconds poll_timeout=BOTAN_RNG_RESEED_DEFAULT_TIMEOUT)
void randomize_with_ts_input(uint8_t output[], size_t output_len) override final
virtual void generate_output(uint8_t output[], size_t output_len, const uint8_t input[], size_t input_len)=0
virtual size_t security_level() const =0
virtual void clear_state()=0
size_t reseed(Entropy_Sources &srcs, size_t poll_bits=BOTAN_RNG_RESEED_POLL_BITS, std::chrono::milliseconds poll_timeout=BOTAN_RNG_RESEED_DEFAULT_TIMEOUT) override
void initialize_with(const uint8_t input[], size_t length)
virtual void update(const uint8_t input[], size_t input_len)=0
bool is_seeded() const override final
void randomize_with_input(uint8_t output[], size_t output_len, const uint8_t input[], size_t input_len) override final
virtual size_t max_number_of_bytes_per_request() const =0
void clear() override final
void randomize(uint8_t output[], size_t output_len) override final
void reseed_from_rng(RandomNumberGenerator &rng, size_t poll_bits=BOTAN_RNG_RESEED_POLL_BITS) override final
void add_entropy(const uint8_t input[], size_t input_len) override final
uint64_t BOTAN_TEST_API get_high_resolution_clock()
uint64_t BOTAN_TEST_API get_system_timestamp_ns()
uint32_t BOTAN_TEST_API get_process_id()
RandomNumberGenerator & system_rng()
void store_le(uint16_t in, uint8_t out[2])