diff options
Diffstat (limited to 'src/lib/entropy/hres_timer')
| -rw-r--r-- | src/lib/entropy/hres_timer/hres_timer.cpp | 41 |
1 files changed, 30 insertions, 11 deletions
diff --git a/src/lib/entropy/hres_timer/hres_timer.cpp b/src/lib/entropy/hres_timer/hres_timer.cpp index 7295a119b..1f7c12cdb 100644 --- a/src/lib/entropy/hres_timer/hres_timer.cpp +++ b/src/lib/entropy/hres_timer/hres_timer.cpp @@ -7,9 +7,16 @@ #include <botan/internal/hres_timer.h> #include <botan/cpuid.h> +#include <chrono> #if defined(BOTAN_TARGET_OS_HAS_QUERY_PERF_COUNTER) #include <windows.h> + #undef min + #undef max +#endif + +#if defined(BOTAN_TARGET_OS_HAS_CLOCK_GETTIME) + #include <time.h> #endif namespace Botan { @@ -19,9 +26,21 @@ namespace Botan { */ void High_Resolution_Timestamp::poll(Entropy_Accumulator& accum) { - // Don't count the timestamp as contributing any entropy + // Don't count any timestamps as contributing any entropy const double ESTIMATED_ENTROPY_PER_BYTE = 0.0; +#define STD_CHRONO_POLL(clock) \ + do { \ + auto timestamp = clock::now().time_since_epoch().count(); \ + accum.add(timestamp, ESTIMATED_ENTROPY_PER_BYTE); \ + } while(0) + + STD_CHRONO_POLL(std::chrono::high_resolution_clock); + STD_CHRONO_POLL(std::chrono::system_clock); + STD_CHRONO_POLL(std::chrono::steady_clock); + +#undef STD_CHRONO_POLL + #if defined(BOTAN_TARGET_OS_HAS_QUERY_PERF_COUNTER) { LARGE_INTEGER tv; @@ -32,7 +51,7 @@ void High_Resolution_Timestamp::poll(Entropy_Accumulator& accum) #if defined(BOTAN_TARGET_OS_HAS_CLOCK_GETTIME) -#define CLOCK_POLL(src) \ +#define CLOCK_GETTIME_POLL(src) \ do { \ struct timespec ts; \ ::clock_gettime(src, &ts); \ @@ -40,38 +59,38 @@ void High_Resolution_Timestamp::poll(Entropy_Accumulator& accum) } while(0) #if defined(CLOCK_REALTIME) - CLOCK_POLL(CLOCK_REALTIME); + CLOCK_GETTIME_POLL(CLOCK_REALTIME); #endif #if defined(CLOCK_REALTIME_COARSE) - CLOCK_POLL(CLOCK_REALTIME_COARSE); + CLOCK_GETTIME_POLL(CLOCK_REALTIME_COARSE); #endif #if defined(CLOCK_MONOTONIC) - CLOCK_POLL(CLOCK_MONOTONIC); + CLOCK_GETTIME_POLL(CLOCK_MONOTONIC); #endif #if defined(CLOCK_MONOTONIC_COARSE) - CLOCK_POLL(CLOCK_MONOTONIC_COARSE); + CLOCK_GETTIME_POLL(CLOCK_MONOTONIC_COARSE); #endif #if defined(CLOCK_MONOTONIC_RAW) - CLOCK_POLL(CLOCK_MONOTONIC_RAW); + CLOCK_GETTIME_POLL(CLOCK_MONOTONIC_RAW); #endif #if defined(CLOCK_BOOTTIME) - CLOCK_POLL(CLOCK_BOOTTIME); + CLOCK_GETTIME_POLL(CLOCK_BOOTTIME); #endif #if defined(CLOCK_PROCESS_CPUTIME_ID) - CLOCK_POLL(CLOCK_PROCESS_CPUTIME_ID); + CLOCK_GETTIME_POLL(CLOCK_PROCESS_CPUTIME_ID); #endif #if defined(CLOCK_THREAD_CPUTIME_ID) - CLOCK_POLL(CLOCK_THREAD_CPUTIME_ID); + CLOCK_GETTIME_POLL(CLOCK_THREAD_CPUTIME_ID); #endif -#undef CLOCK_POLL +#undef CLOCK_GETTIME_POLL #endif |