From 888cce57a67c901b89c86cc645f275071d021285 Mon Sep 17 00:00:00 2001 From: Matt Corallo Date: Mon, 22 May 2017 16:01:52 -0400 Subject: Add perf counter data to GetStrongRandBytes state in scheduler --- src/random.cpp | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) (limited to 'src/random.cpp') diff --git a/src/random.cpp b/src/random.cpp index 3c856ecfa..de7553c82 100644 --- a/src/random.cpp +++ b/src/random.cpp @@ -203,6 +203,23 @@ void GetRandBytes(unsigned char* buf, int num) } } +static void AddDataToRng(void* data, size_t len); + +void RandAddSeedSleep() +{ + int64_t nPerfCounter1 = GetPerformanceCounter(); + std::this_thread::sleep_for(std::chrono::milliseconds(1)); + int64_t nPerfCounter2 = GetPerformanceCounter(); + + // Combine with and update state + AddDataToRng(&nPerfCounter1, sizeof(nPerfCounter1)); + AddDataToRng(&nPerfCounter2, sizeof(nPerfCounter2)); + + memory_cleanse(&nPerfCounter1, sizeof(nPerfCounter1)); + memory_cleanse(&nPerfCounter2, sizeof(nPerfCounter2)); +} + + static std::mutex cs_rng_state; static unsigned char rng_state[32] = {0}; static uint64_t rng_counter = 0; -- cgit v1.2.3