1 files changed, 59 insertions, 0 deletions
diff --git a/comm/third_party/botan/src/lib/entropy/win32_stats/es_win32.cpp b/comm/third_party/botan/src/lib/entropy/win32_stats/es_win32.cpp
new file mode 100644
index 0000000000..3a175bf19d
--- /dev/null
+++ b/comm/third_party/botan/src/lib/entropy/win32_stats/es_win32.cpp
@@ -0,0 +1,59 @@
+/*
+* (C) 1999-2009,2016,2020 Jack Lloyd
+*
+* Botan is released under the Simplified BSD License (see license.txt)
+*/
+
+#include <botan/internal/es_win32.h>
+
+#define NOMINMAX 1
+#define _WINSOCKAPI_ // stop windows.h including winsock.h
+#include <windows.h>
+
+namespace Botan {
+
+size_t Win32_EntropySource::poll(RandomNumberGenerator& rng)
+   {
+   rng.add_entropy_T(::GetTickCount());
+   rng.add_entropy_T(::GetMessagePos());
+   rng.add_entropy_T(::GetMessageTime());
+   rng.add_entropy_T(::GetInputState());
+
+   rng.add_entropy_T(::GetCurrentProcessId());
+   rng.add_entropy_T(::GetCurrentThreadId());
+
+   SYSTEM_INFO sys_info;
+   ::GetSystemInfo(&sys_info);
+   rng.add_entropy_T(sys_info);
+
+   MEMORYSTATUSEX mem_info;
+   ::GlobalMemoryStatusEx(&mem_info);
+   rng.add_entropy_T(mem_info);
+
+   POINT point;
+   ::GetCursorPos(&point);
+   rng.add_entropy_T(point);
+
+   ::GetCaretPos(&point);
+   rng.add_entropy_T(point);
+
+   /*
+   Potential other sources to investigate
+
+   GetProductInfo
+   GetComputerNameExA
+   GetSystemFirmwareTable
+   GetVersionExA
+   GetProcessorSystemCycleTime
+   GetProcessHandleCount(GetCurrentProcess())
+   GetThreadTimes(GetCurrentThread())
+   QueryThreadCycleTime
+   QueryIdleProcessorCycleTime
+   QueryUnbiasedInterruptTime
+   */
+
+   // We assume all of the above is basically junk
+   return 0;
+   }
+
+}