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/*************************************************
* Win32 EntropySource Source File *
* (C) 1999-2007 The Botan Project *
*************************************************/
#include <botan/es_win32.h>
#include <windows.h>
#include <tlhelp32.h>
namespace Botan {
/*************************************************
* Win32 Slow Poll *
*************************************************/
void Win32_EntropySource::do_slow_poll()
{
const u32bit MAX_ITEMS = 256;
do_fast_poll();
HANDLE snapshot = CreateToolhelp32Snapshot(TH32CS_SNAPALL, 0);
#define TOOLHELP32_ITER(DATA_TYPE, FUNC_FIRST, FUNC_NEXT) \
{ \
u32bit items = 0; \
DATA_TYPE info; \
info.dwSize = sizeof(DATA_TYPE); \
if(FUNC_FIRST(snapshot, &info)) \
{ \
do \
{ \
if(items++ > MAX_ITEMS) break; \
add_bytes(&info, sizeof(info)); \
} while(FUNC_NEXT(snapshot, &info)); \
} \
}
TOOLHELP32_ITER(MODULEENTRY32, Module32First, Module32Next);
TOOLHELP32_ITER(PROCESSENTRY32, Process32First, Process32Next);
TOOLHELP32_ITER(THREADENTRY32, Thread32First, Thread32Next);
#undef TOOLHELP32_ITER
u32bit heap_lists_found = 0;
HEAPLIST32 heap_list;
heap_list.dwSize = sizeof(HEAPLIST32);
const u32bit HEAP_LISTS_MAX = 32;
const u32bit HEAP_OBJS_PER_LIST = 128;
if(Heap32ListFirst(snapshot, &heap_list))
{
do
{
add_bytes(&heap_list, sizeof(HEAPLIST32));
if(heap_lists_found++ > HEAP_LISTS_MAX)
break;
u32bit heap_objs_found = 0;
HEAPENTRY32 heap_entry;
heap_entry.dwSize = sizeof(HEAPENTRY32);
if(Heap32First(&heap_entry, heap_list.th32ProcessID,
heap_list.th32HeapID))
{
do
{
if(heap_objs_found++ > HEAP_OBJS_PER_LIST)
break;
add_bytes(&heap_entry, sizeof(HEAPENTRY32));
} while(Heap32Next(&heap_entry));
}
} while(Heap32ListNext(snapshot, &heap_list));
}
CloseHandle(snapshot);
}
/*************************************************
* Win32 Fast Poll *
*************************************************/
void Win32_EntropySource::do_fast_poll()
{
add_bytes(GetTickCount());
add_bytes(GetMessagePos());
add_bytes(GetMessageTime());
add_bytes(GetInputState());
add_bytes(GetCurrentProcessId());
add_bytes(GetCurrentThreadId());
SYSTEM_INFO sys_info;
GetSystemInfo(&sys_info);
add_bytes(&sys_info, sizeof(sys_info));
MEMORYSTATUS mem_info;
GlobalMemoryStatus(&mem_info);
add_bytes(&mem_info, sizeof(mem_info));
POINT point;
GetCursorPos(&point);
add_bytes(&point, sizeof(point));
GetCaretPos(&point);
add_bytes(&point, sizeof(point));
LARGE_INTEGER perf_counter;
QueryPerformanceCounter(&perf_counter);
add_bytes(&perf_counter, sizeof(perf_counter));
}
}
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