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/**
* Win32 EntropySource Source File
* (C) 1999-2008 Jack Lloyd
*/
#include <botan/es_win32.h>
#include <botan/xor_buf.h>
#include <windows.h>
#include <tlhelp32.h>
namespace Botan {
/**
* Win32 slow poll using Tooltip32
*/
u32bit Win32_EntropySource::slow_poll(byte buf[], u32bit length)
{
if(length == 0)
return 0;
const u32bit MAX_ITEMS = length / 4;
u32bit buf_i = 0;
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; \
buf_i = xor_into_buf(buf, buf_i, length, 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
{
buf_i = xor_into_buf(buf, buf_i, length, heap_list);
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;
buf_i = xor_into_buf(buf, buf_i, length, heap_entry);
} while(Heap32Next(&heap_entry));
}
} while(Heap32ListNext(snapshot, &heap_list));
}
CloseHandle(snapshot);
return length;
}
/**
* Win32 fast poll
*/
u32bit Win32_EntropySource::fast_poll(byte buf[], u32bit length)
{
if(length == 0)
return 0;
length = std::min<u32bit>(length, 32);
u32bit buf_i = 0;
u32bit stats[] = {
GetTickCount(),
GetMessagePos(),
GetMessageTime(),
GetInputState(),
GetCurrentProcessId(),
GetCurrentThreadId()
};
for(u32bit i = 0; i != sizeof(stats) / sizeof(stats[0]); ++i)
buf_i = xor_into_buf(buf, buf_i, length, stats[i]);
SYSTEM_INFO sys_info;
GetSystemInfo(&sys_info);
buf_i = xor_into_buf(buf, buf_i, length, sys_info);
MEMORYSTATUS mem_info;
GlobalMemoryStatus(&mem_info);
buf_i = xor_into_buf(buf, buf_i, length, mem_info);
POINT point;
GetCursorPos(&point);
buf_i = xor_into_buf(buf, buf_i, length, point);
GetCaretPos(&point);
buf_i = xor_into_buf(buf, buf_i, length, point);
LARGE_INTEGER perf_counter;
QueryPerformanceCounter(&perf_counter);
buf_i = xor_into_buf(buf, buf_i, length, perf_counter);
return length;
}
}
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