/Common/Random.c
C | 772 lines | 534 code | 131 blank | 107 comment | 115 complexity | fcfbc39a7bcde4ec9a4fab7f4ac4b018 MD5 | raw file
- /*
- Legal Notice: Some portions of the source code contained in this file were
- derived from the source code of Encryption for the Masses 2.02a, which is
- Copyright (c) 1998-2000 Paul Le Roux and which is governed by the 'License
- Agreement for Encryption for the Masses'. Modifications and additions to
- the original source code (contained in this file) and all other portions
- of this file are Copyright (c) 2003-2009 TrueCrypt Developers Association
- and are governed by the TrueCrypt License 3.0 the full text of which is
- contained in the file License.txt included in TrueCrypt binary and source
- code distribution packages. */
- #include "Tcdefs.h"
- #include "Crc.h"
- #include "Random.h"
- static unsigned __int8 buffer[RNG_POOL_SIZE];
- static unsigned char *pRandPool = NULL;
- static BOOL bRandDidInit = FALSE;
- static int nRandIndex = 0, randPoolReadIndex = 0;
- static int HashFunction = DEFAULT_HASH_ALGORITHM;
- static BOOL bDidSlowPoll = FALSE;
- BOOL volatile bFastPollEnabled = TRUE; /* Used to reduce CPU load when performing benchmarks */
- BOOL volatile bRandmixEnabled = TRUE; /* Used to reduce CPU load when performing benchmarks */
- static BOOL RandomPoolEnrichedByUser = FALSE;
- static HANDLE PeriodicFastPollThreadHandle = NULL;
- /* Macro to add a single byte to the pool */
- #define RandaddByte(x) {\
- if (nRandIndex == RNG_POOL_SIZE) nRandIndex = 0;\
- pRandPool[nRandIndex] = (unsigned char) ((unsigned char)x + pRandPool[nRandIndex]); \
- if (nRandIndex % RANDMIX_BYTE_INTERVAL == 0) Randmix();\
- nRandIndex++; \
- }
- /* Macro to add four bytes to the pool */
- #define RandaddInt32(x) RandAddInt((unsigned __int32)x);
- void RandAddInt (unsigned __int32 x)
- {
- RandaddByte(x);
- RandaddByte((x >> 8));
- RandaddByte((x >> 16));
- RandaddByte((x >> 24));
- }
- #include <tlhelp32.h>
- #include "Dlgcode.h"
- HHOOK hMouse = NULL; /* Mouse hook for the random number generator */
- HHOOK hKeyboard = NULL; /* Keyboard hook for the random number generator */
- /* Variables for thread control, the thread is used to gather up info about
- the system in in the background */
- CRITICAL_SECTION critRandProt; /* The critical section */
- BOOL volatile bThreadTerminate = FALSE; /* This variable is shared among thread's so its made volatile */
- /* Network library handle for the SlowPoll function */
- HANDLE hNetAPI32 = NULL;
- // CryptoAPI
- BOOL CryptoAPIAvailable = FALSE;
- HCRYPTPROV hCryptProv;
- /* Init the random number generator, setup the hooks, and start the thread */
- int Randinit ()
- {
- if (GetMaxPkcs5OutSize() > RNG_POOL_SIZE)
- TC_THROW_FATAL_EXCEPTION;
- if(bRandDidInit)
- return 0;
- InitializeCriticalSection (&critRandProt);
- bRandDidInit = TRUE;
- if (pRandPool == NULL)
- {
- pRandPool = (unsigned char *) TCalloc (RANDOMPOOL_ALLOCSIZE);
- if (pRandPool == NULL)
- goto error;
- bDidSlowPoll = FALSE;
- RandomPoolEnrichedByUser = FALSE;
- memset (pRandPool, 0, RANDOMPOOL_ALLOCSIZE);
- VirtualLock (pRandPool, RANDOMPOOL_ALLOCSIZE);
- }
- hKeyboard = SetWindowsHookEx (WH_KEYBOARD, (HOOKPROC)&KeyboardProc, NULL, GetCurrentThreadId ());
- if (hKeyboard == 0) handleWin32Error (0);
- hMouse = SetWindowsHookEx (WH_MOUSE, (HOOKPROC)&MouseProc, NULL, GetCurrentThreadId ());
- if (hMouse == 0)
- {
- handleWin32Error (0);
- goto error;
- }
- if (!CryptAcquireContext (&hCryptProv, NULL, NULL, PROV_RSA_FULL, 0)
- && !CryptAcquireContext (&hCryptProv, NULL, NULL, PROV_RSA_FULL, CRYPT_NEWKEYSET))
- CryptoAPIAvailable = FALSE;
- else
- CryptoAPIAvailable = TRUE;
- if (!(PeriodicFastPollThreadHandle = (HANDLE) _beginthreadex (NULL, 0, PeriodicFastPollThreadProc, NULL, 0, NULL)))
- goto error;
- return 0;
- error:
- RandStop (TRUE);
- return 1;
- }
- /* Close everything down, including the thread which is closed down by
- setting a flag which eventually causes the thread function to exit */
- void RandStop (BOOL freePool)
- {
- if (!bRandDidInit && freePool && pRandPool)
- goto freePool;
- if (bRandDidInit == FALSE)
- return;
- EnterCriticalSection (&critRandProt);
- if (hMouse != 0)
- UnhookWindowsHookEx (hMouse);
- if (hKeyboard != 0)
- UnhookWindowsHookEx (hKeyboard);
- bThreadTerminate = TRUE;
- LeaveCriticalSection (&critRandProt);
- if (PeriodicFastPollThreadHandle)
- WaitForSingleObject (PeriodicFastPollThreadHandle, INFINITE);
- if (hNetAPI32 != 0)
- {
- FreeLibrary (hNetAPI32);
- hNetAPI32 = NULL;
- }
- if (CryptoAPIAvailable)
- {
- CryptReleaseContext (hCryptProv, 0);
- CryptoAPIAvailable = FALSE;
- }
- hMouse = NULL;
- hKeyboard = NULL;
- bThreadTerminate = FALSE;
- DeleteCriticalSection (&critRandProt);
- bRandDidInit = FALSE;
- freePool:
- if (freePool)
- {
- bDidSlowPoll = FALSE;
- RandomPoolEnrichedByUser = FALSE;
- if (pRandPool != NULL)
- {
- burn (pRandPool, RANDOMPOOL_ALLOCSIZE);
- TCfree (pRandPool);
- pRandPool = NULL;
- }
- }
- }
- BOOL IsRandomNumberGeneratorStarted ()
- {
- return bRandDidInit;
- }
- void RandSetHashFunction (int hash_algo_id)
- {
- if (HashIsDeprecated (hash_algo_id))
- hash_algo_id = DEFAULT_HASH_ALGORITHM;
- HashFunction = hash_algo_id;
- }
- int RandGetHashFunction (void)
- {
- return HashFunction;
- }
- void SetRandomPoolEnrichedByUserStatus (BOOL enriched)
- {
- RandomPoolEnrichedByUser = enriched;
- }
- BOOL IsRandomPoolEnrichedByUser ()
- {
- return RandomPoolEnrichedByUser;
- }
- /* The random pool mixing function */
- BOOL Randmix ()
- {
- if (bRandmixEnabled)
- {
- unsigned char hashOutputBuffer [MAX_DIGESTSIZE];
- WHIRLPOOL_CTX wctx;
- RMD160_CTX rctx;
- sha512_ctx sctx;
- int poolIndex, digestIndex, digestSize;
- switch (HashFunction)
- {
- case RIPEMD160:
- digestSize = RIPEMD160_DIGESTSIZE;
- break;
- case SHA512:
- digestSize = SHA512_DIGESTSIZE;
- break;
- case WHIRLPOOL:
- digestSize = WHIRLPOOL_DIGESTSIZE;
- break;
- default:
- TC_THROW_FATAL_EXCEPTION;
- }
- if (RNG_POOL_SIZE % digestSize)
- TC_THROW_FATAL_EXCEPTION;
- for (poolIndex = 0; poolIndex < RNG_POOL_SIZE; poolIndex += digestSize)
- {
- /* Compute the message digest of the entire pool using the selected hash function. */
- switch (HashFunction)
- {
- case RIPEMD160:
- RMD160Init(&rctx);
- RMD160Update(&rctx, pRandPool, RNG_POOL_SIZE);
- RMD160Final(hashOutputBuffer, &rctx);
- break;
- case SHA512:
- sha512_begin (&sctx);
- sha512_hash (pRandPool, RNG_POOL_SIZE, &sctx);
- sha512_end (hashOutputBuffer, &sctx);
- break;
- case WHIRLPOOL:
- WHIRLPOOL_init (&wctx);
- WHIRLPOOL_add (pRandPool, RNG_POOL_SIZE * 8, &wctx);
- WHIRLPOOL_finalize (&wctx, hashOutputBuffer);
- break;
- default:
- // Unknown/wrong ID
- TC_THROW_FATAL_EXCEPTION;
- }
- /* XOR the resultant message digest to the pool at the poolIndex position. */
- for (digestIndex = 0; digestIndex < digestSize; digestIndex++)
- {
- pRandPool [poolIndex + digestIndex] ^= hashOutputBuffer [digestIndex];
- }
- }
- /* Prevent leaks */
- burn (hashOutputBuffer, MAX_DIGESTSIZE);
- switch (HashFunction)
- {
- case RIPEMD160:
- burn (&rctx, sizeof(rctx));
- break;
- case SHA512:
- burn (&sctx, sizeof(sctx));
- break;
- case WHIRLPOOL:
- burn (&wctx, sizeof(wctx));
- break;
- default:
- // Unknown/wrong ID
- TC_THROW_FATAL_EXCEPTION;
- }
- }
- return TRUE;
- }
- /* Add a buffer to the pool */
- void RandaddBuf (void *buf, int len)
- {
- int i;
- for (i = 0; i < len; i++)
- {
- RandaddByte (((unsigned char *) buf)[i]);
- }
- }
- BOOL RandpeekBytes (unsigned char *buf, int len)
- {
- if (!bRandDidInit)
- return FALSE;
- if (len > RNG_POOL_SIZE)
- {
- Error ("ERR_NOT_ENOUGH_RANDOM_DATA");
- len = RNG_POOL_SIZE;
- }
- EnterCriticalSection (&critRandProt);
- memcpy (buf, pRandPool, len);
- LeaveCriticalSection (&critRandProt);
- return TRUE;
- }
- /* Get len random bytes from the pool (max. RNG_POOL_SIZE bytes per a single call) */
- BOOL RandgetBytes (unsigned char *buf, int len, BOOL forceSlowPoll)
- {
- int i;
- BOOL ret = TRUE;
- if (!bRandDidInit || HashFunction == 0)
- TC_THROW_FATAL_EXCEPTION;
- EnterCriticalSection (&critRandProt);
- if (bDidSlowPoll == FALSE || forceSlowPoll)
- {
- if (!SlowPoll ())
- ret = FALSE;
- else
- bDidSlowPoll = TRUE;
- }
- if (!FastPoll ())
- ret = FALSE;
- /* There's never more than RNG_POOL_SIZE worth of randomess */
- if (len > RNG_POOL_SIZE)
- {
- Error ("ERR_NOT_ENOUGH_RANDOM_DATA");
- len = RNG_POOL_SIZE;
- return FALSE;
- }
- // Requested number of bytes is copied from pool to output buffer,
- // pool is rehashed, and output buffer is XORed with new data from pool
- for (i = 0; i < len; i++)
- {
- buf[i] = pRandPool[randPoolReadIndex++];
- if (randPoolReadIndex == RNG_POOL_SIZE) randPoolReadIndex = 0;
- }
- /* Invert the pool */
- for (i = 0; i < RNG_POOL_SIZE / 4; i++)
- {
- ((unsigned __int32 *) pRandPool)[i] = ~((unsigned __int32 *) pRandPool)[i];
- }
- // Mix the pool
- if (!FastPoll ())
- ret = FALSE;
- // XOR the current pool content into the output buffer to prevent pool state leaks
- for (i = 0; i < len; i++)
- {
- buf[i] ^= pRandPool[randPoolReadIndex++];
- if (randPoolReadIndex == RNG_POOL_SIZE) randPoolReadIndex = 0;
- }
- LeaveCriticalSection (&critRandProt);
- if (!ret)
- TC_THROW_FATAL_EXCEPTION;
- return ret;
- }
- /* Capture the mouse, and as long as the event is not the same as the last
- two events, add the crc of the event, and the crc of the time difference
- between this event and the last + the current time to the pool.
- The role of CRC-32 is merely to perform diffusion. Note that the output
- of CRC-32 is subsequently processed using a cryptographically secure hash
- algorithm. */
- LRESULT CALLBACK MouseProc (int nCode, WPARAM wParam, LPARAM lParam)
- {
- static DWORD dwLastTimer;
- static unsigned __int32 lastCrc, lastCrc2;
- MOUSEHOOKSTRUCT *lpMouse = (MOUSEHOOKSTRUCT *) lParam;
- if (nCode < 0)
- return CallNextHookEx (hMouse, nCode, wParam, lParam);
- else
- {
- DWORD dwTimer = GetTickCount ();
- DWORD j = dwLastTimer - dwTimer;
- unsigned __int32 crc = 0L;
- int i;
- dwLastTimer = dwTimer;
- for (i = 0; i < sizeof (MOUSEHOOKSTRUCT); i++)
- {
- crc = UPDC32 (((unsigned char *) lpMouse)[i], crc);
- }
- if (crc != lastCrc && crc != lastCrc2)
- {
- unsigned __int32 timeCrc = 0L;
- for (i = 0; i < 4; i++)
- {
- timeCrc = UPDC32 (((unsigned char *) &j)[i], timeCrc);
- }
- for (i = 0; i < 4; i++)
- {
- timeCrc = UPDC32 (((unsigned char *) &dwTimer)[i], timeCrc);
- }
- EnterCriticalSection (&critRandProt);
- RandaddInt32 ((unsigned __int32) (crc + timeCrc));
- LeaveCriticalSection (&critRandProt);
- }
- lastCrc2 = lastCrc;
- lastCrc = crc;
- }
- return 0;
- }
- /* Capture the keyboard, as long as the event is not the same as the last two
- events, add the crc of the event to the pool along with the crc of the time
- difference between this event and the last. The role of CRC-32 is merely to
- perform diffusion. Note that the output of CRC-32 is subsequently processed
- using a cryptographically secure hash algorithm. */
- LRESULT CALLBACK KeyboardProc (int nCode, WPARAM wParam, LPARAM lParam)
- {
- static int lLastKey, lLastKey2;
- static DWORD dwLastTimer;
- int nKey = (lParam & 0x00ff0000) >> 16;
- int nCapture = 0;
- if (nCode < 0)
- return CallNextHookEx (hMouse, nCode, wParam, lParam);
- if ((lParam & 0x0000ffff) == 1 && !(lParam & 0x20000000) &&
- (lParam & 0x80000000))
- {
- if (nKey != lLastKey)
- nCapture = 1; /* Capture this key */
- else if (nKey != lLastKey2)
- nCapture = 1; /* Allow for one repeat */
- }
- if (nCapture)
- {
- DWORD dwTimer = GetTickCount ();
- DWORD j = dwLastTimer - dwTimer;
- unsigned __int32 timeCrc = 0L;
- int i;
- dwLastTimer = dwTimer;
- lLastKey2 = lLastKey;
- lLastKey = nKey;
- for (i = 0; i < 4; i++)
- {
- timeCrc = UPDC32 (((unsigned char *) &j)[i], timeCrc);
- }
- for (i = 0; i < 4; i++)
- {
- timeCrc = UPDC32 (((unsigned char *) &dwTimer)[i], timeCrc);
- }
- EnterCriticalSection (&critRandProt);
- RandaddInt32 ((unsigned __int32) (crc32int(&lParam) + timeCrc));
- LeaveCriticalSection (&critRandProt);
- }
- return CallNextHookEx (hMouse, nCode, wParam, lParam);
- }
- /* This is the thread function which will poll the system for randomness */
- static unsigned __stdcall PeriodicFastPollThreadProc (void *dummy)
- {
- if (dummy); /* Remove unused parameter warning */
- for (;;)
- {
- EnterCriticalSection (&critRandProt);
- if (bThreadTerminate)
- {
- bThreadTerminate = FALSE;
- LeaveCriticalSection (&critRandProt);
- _endthreadex (0);
- }
- else if (bFastPollEnabled)
- {
- FastPoll ();
- }
- LeaveCriticalSection (&critRandProt);
- Sleep (FASTPOLL_INTERVAL);
- }
- }
- /* Type definitions for function pointers to call NetAPI32 functions */
- typedef
- DWORD (WINAPI * NETSTATISTICSGET) (LPWSTR szServer, LPWSTR szService,
- DWORD dwLevel, DWORD dwOptions,
- LPBYTE * lpBuffer);
- typedef
- DWORD (WINAPI * NETAPIBUFFERSIZE) (LPVOID lpBuffer, LPDWORD cbBuffer);
- typedef
- DWORD (WINAPI * NETAPIBUFFERFREE) (LPVOID lpBuffer);
- NETSTATISTICSGET pNetStatisticsGet = NULL;
- NETAPIBUFFERSIZE pNetApiBufferSize = NULL;
- NETAPIBUFFERFREE pNetApiBufferFree = NULL;
- /* This is the slowpoll function which gathers up network/hard drive
- performance data for the random pool */
- BOOL SlowPoll (void)
- {
- static int isWorkstation = -1;
- static int cbPerfData = 0x10000;
- HANDLE hDevice;
- LPBYTE lpBuffer;
- DWORD dwSize, status;
- LPWSTR lpszLanW, lpszLanS;
- int nDrive;
- /* Find out whether this is an NT server or workstation if necessary */
- if (isWorkstation == -1)
- {
- HKEY hKey;
- if (RegOpenKeyEx (HKEY_LOCAL_MACHINE,
- "SYSTEM\\CurrentControlSet\\Control\\ProductOptions",
- 0, KEY_READ, &hKey) == ERROR_SUCCESS)
- {
- unsigned char szValue[32];
- dwSize = sizeof (szValue);
- isWorkstation = TRUE;
- status = RegQueryValueEx (hKey, "ProductType", 0, NULL,
- szValue, &dwSize);
- if (status == ERROR_SUCCESS && _stricmp ((char *) szValue, "WinNT"))
- /* Note: There are (at least) three cases for
- ProductType: WinNT = NT Workstation,
- ServerNT = NT Server, LanmanNT = NT Server
- acting as a Domain Controller */
- isWorkstation = FALSE;
- RegCloseKey (hKey);
- }
- }
- /* Initialize the NetAPI32 function pointers if necessary */
- if (hNetAPI32 == NULL)
- {
- /* Obtain a handle to the module containing the Lan Manager
- functions */
- hNetAPI32 = LoadLibrary ("NETAPI32.DLL");
- if (hNetAPI32 != NULL)
- {
- /* Now get pointers to the functions */
- pNetStatisticsGet = (NETSTATISTICSGET) GetProcAddress (hNetAPI32,
- "NetStatisticsGet");
- pNetApiBufferSize = (NETAPIBUFFERSIZE) GetProcAddress (hNetAPI32,
- "NetApiBufferSize");
- pNetApiBufferFree = (NETAPIBUFFERFREE) GetProcAddress (hNetAPI32,
- "NetApiBufferFree");
- /* Make sure we got valid pointers for every NetAPI32
- function */
- if (pNetStatisticsGet == NULL ||
- pNetApiBufferSize == NULL ||
- pNetApiBufferFree == NULL)
- {
- /* Free the library reference and reset the
- static handle */
- FreeLibrary (hNetAPI32);
- hNetAPI32 = NULL;
- }
- }
- }
- /* Get network statistics. Note: Both NT Workstation and NT Server
- by default will be running both the workstation and server
- services. The heuristic below is probably useful though on the
- assumption that the majority of the network traffic will be via
- the appropriate service */
- lpszLanW = (LPWSTR) WIDE ("LanmanWorkstation");
- lpszLanS = (LPWSTR) WIDE ("LanmanServer");
- if (hNetAPI32 &&
- pNetStatisticsGet (NULL,
- isWorkstation ? lpszLanW : lpszLanS,
- 0, 0, &lpBuffer) == 0)
- {
- pNetApiBufferSize (lpBuffer, &dwSize);
- RandaddBuf ((unsigned char *) lpBuffer, dwSize);
- pNetApiBufferFree (lpBuffer);
- }
- /* Get disk I/O statistics for all the hard drives */
- for (nDrive = 0;; nDrive++)
- {
- DISK_PERFORMANCE diskPerformance;
- char szDevice[24];
- /* Check whether we can access this device */
- sprintf (szDevice, "\\\\.\\PhysicalDrive%d", nDrive);
- hDevice = CreateFile (szDevice, 0, FILE_SHARE_READ | FILE_SHARE_WRITE,
- NULL, OPEN_EXISTING, 0, NULL);
- if (hDevice == INVALID_HANDLE_VALUE)
- break;
- /* Note: This only works if you have turned on the disk
- performance counters with 'diskperf -y'. These counters
- are off by default */
- if (DeviceIoControl (hDevice, IOCTL_DISK_PERFORMANCE, NULL, 0,
- &diskPerformance, sizeof (DISK_PERFORMANCE),
- &dwSize, NULL))
- {
- RandaddBuf ((unsigned char *) &diskPerformance, dwSize);
- }
- CloseHandle (hDevice);
- }
- // CryptoAPI
- if (CryptoAPIAvailable && CryptGenRandom (hCryptProv, sizeof (buffer), buffer))
- RandaddBuf (buffer, sizeof (buffer));
- burn(buffer, sizeof (buffer));
- Randmix();
- return TRUE;
- }
- /* This is the fastpoll function which gathers up info by calling various api's */
- BOOL FastPoll (void)
- {
- int nOriginalRandIndex = nRandIndex;
- static BOOL addedFixedItems = FALSE;
- FILETIME creationTime, exitTime, kernelTime, userTime;
- DWORD minimumWorkingSetSize, maximumWorkingSetSize;
- LARGE_INTEGER performanceCount;
- MEMORYSTATUS memoryStatus;
- HANDLE handle;
- POINT point;
- /* Get various basic pieces of system information */
- RandaddInt32 (GetActiveWindow ()); /* Handle of active window */
- RandaddInt32 (GetCapture ()); /* Handle of window with mouse
- capture */
- RandaddInt32 (GetClipboardOwner ()); /* Handle of clipboard owner */
- RandaddInt32 (GetClipboardViewer ()); /* Handle of start of
- clpbd.viewer list */
- RandaddInt32 (GetCurrentProcess ()); /* Pseudohandle of current
- process */
- RandaddInt32 (GetCurrentProcessId ()); /* Current process ID */
- RandaddInt32 (GetCurrentThread ()); /* Pseudohandle of current
- thread */
- RandaddInt32 (GetCurrentThreadId ()); /* Current thread ID */
- RandaddInt32 (GetCurrentTime ()); /* Milliseconds since Windows
- started */
- RandaddInt32 (GetDesktopWindow ()); /* Handle of desktop window */
- RandaddInt32 (GetFocus ()); /* Handle of window with kb.focus */
- RandaddInt32 (GetInputState ()); /* Whether sys.queue has any events */
- RandaddInt32 (GetMessagePos ()); /* Cursor pos.for last message */
- RandaddInt32 (GetMessageTime ()); /* 1 ms time for last message */
- RandaddInt32 (GetOpenClipboardWindow ()); /* Handle of window with
- clpbd.open */
- RandaddInt32 (GetProcessHeap ()); /* Handle of process heap */
- RandaddInt32 (GetProcessWindowStation ()); /* Handle of procs
- window station */
- RandaddInt32 (GetQueueStatus (QS_ALLEVENTS)); /* Types of events in
- input queue */
- /* Get multiword system information */
- GetCaretPos (&point); /* Current caret position */
- RandaddBuf ((unsigned char *) &point, sizeof (POINT));
- GetCursorPos (&point); /* Current mouse cursor position */
- RandaddBuf ((unsigned char *) &point, sizeof (POINT));
- /* Get percent of memory in use, bytes of physical memory, bytes of
- free physical memory, bytes in paging file, free bytes in paging
- file, user bytes of address space, and free user bytes */
- memoryStatus.dwLength = sizeof (MEMORYSTATUS);
- GlobalMemoryStatus (&memoryStatus);
- RandaddBuf ((unsigned char *) &memoryStatus, sizeof (MEMORYSTATUS));
- /* Get thread and process creation time, exit time, time in kernel
- mode, and time in user mode in 100ns intervals */
- handle = GetCurrentThread ();
- GetThreadTimes (handle, &creationTime, &exitTime, &kernelTime, &userTime);
- RandaddBuf ((unsigned char *) &creationTime, sizeof (FILETIME));
- RandaddBuf ((unsigned char *) &exitTime, sizeof (FILETIME));
- RandaddBuf ((unsigned char *) &kernelTime, sizeof (FILETIME));
- RandaddBuf ((unsigned char *) &userTime, sizeof (FILETIME));
- handle = GetCurrentProcess ();
- GetProcessTimes (handle, &creationTime, &exitTime, &kernelTime, &userTime);
- RandaddBuf ((unsigned char *) &creationTime, sizeof (FILETIME));
- RandaddBuf ((unsigned char *) &exitTime, sizeof (FILETIME));
- RandaddBuf ((unsigned char *) &kernelTime, sizeof (FILETIME));
- RandaddBuf ((unsigned char *) &userTime, sizeof (FILETIME));
- /* Get the minimum and maximum working set size for the current
- process */
- GetProcessWorkingSetSize (handle, &minimumWorkingSetSize,
- &maximumWorkingSetSize);
- RandaddInt32 (minimumWorkingSetSize);
- RandaddInt32 (maximumWorkingSetSize);
- /* The following are fixed for the lifetime of the process so we only
- add them once */
- if (addedFixedItems == 0)
- {
- STARTUPINFO startupInfo;
- /* Get name of desktop, console window title, new window
- position and size, window flags, and handles for stdin,
- stdout, and stderr */
- startupInfo.cb = sizeof (STARTUPINFO);
- GetStartupInfo (&startupInfo);
- RandaddBuf ((unsigned char *) &startupInfo, sizeof (STARTUPINFO));
- addedFixedItems = TRUE;
- }
- /* The docs say QPC can fail if appropriate hardware is not
- available. It works on 486 & Pentium boxes, but hasn't been tested
- for 386 or RISC boxes */
- if (QueryPerformanceCounter (&performanceCount))
- RandaddBuf ((unsigned char *) &performanceCount, sizeof (LARGE_INTEGER));
- else
- {
- /* Millisecond accuracy at best... */
- DWORD dwTicks = GetTickCount ();
- RandaddBuf ((unsigned char *) &dwTicks, sizeof (dwTicks));
- }
- // CryptoAPI
- if (CryptoAPIAvailable && CryptGenRandom (hCryptProv, sizeof (buffer), buffer))
- RandaddBuf (buffer, sizeof (buffer));
- /* Apply the pool mixing function */
- Randmix();
- /* Restore the original pool cursor position. If this wasn't done, mouse coordinates
- could be written to a limited area of the pool, especially when moving the mouse
- uninterruptedly. The severity of the problem would depend on the length of data
- written by FastPoll (if it was equal to the size of the pool, mouse coordinates
- would be written only to a particular 4-byte area, whenever moving the mouse
- uninterruptedly). */
- nRandIndex = nOriginalRandIndex;
- return TRUE;
- }