/* Legal Notice: Some portions of the source code contained in this file were derived from the source code of TrueCrypt 7.1a, which is Copyright (c) 2003-2012 TrueCrypt Developers Association and which is governed by the TrueCrypt License 3.0, also 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) 2013-2017 IDRIX and are governed by the Apache License 2.0 the full text of which is contained in the file License.txt included in VeraCrypt binary and source code distribution packages. */ #include "Tcdefs.h" #include "Crc.h" #include "Random.h" #include 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); #ifdef _WIN64 #define RandaddIntPtr(x) RandAddInt64((unsigned __int64)x); #else #define RandaddIntPtr(x) RandAddInt((unsigned __int32)x); #endif void RandAddInt (unsigned __int32 x) { RandaddByte(x); RandaddByte((x >> 8)); RandaddByte((x >> 16)); RandaddByte((x >> 24)); } void RandAddInt64 (unsigned __int64 x) { RandaddByte(x); RandaddByte((x >> 8)); RandaddByte((x >> 16)); RandaddByte((x >> 24)); RandaddByte((x >> 32)); RandaddByte((x >> 40)); RandaddByte((x >> 48)); RandaddByte((x >> 56)); } #include #include "Dlgcode.h" #ifndef SRC_POS #define SRC_POS (__FUNCTION__ ":" TC_TO_STRING(__LINE__)) #endif HHOOK hMouse = NULL; /* Mouse hook for the random number generator */ HHOOK hKeyboard = NULL; /* Keyboard hook for the random number generator */ DWORD ProcessedMouseEventsCounter = 0; /* 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; DWORD CryptoAPILastError = ERROR_SUCCESS; HCRYPTPROV hCryptProv; /* Init the random number generator, setup the hooks, and start the thread */ int Randinit () { DWORD dwLastError = ERROR_SUCCESS; if (GetMaxPkcs5OutSize() > RNG_POOL_SIZE) TC_THROW_FATAL_EXCEPTION; if(bRandDidInit) return 0; InitializeCriticalSection (&critRandProt); bRandDidInit = TRUE; CryptoAPILastError = ERROR_SUCCESS; ProcessedMouseEventsCounter = 0; if (pRandPool == NULL) { pRandPool = (unsigned char *) _aligned_malloc (RANDOMPOOL_ALLOCSIZE, 16); 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, SRC_POS); hMouse = SetWindowsHookEx (WH_MOUSE, (HOOKPROC)&MouseProc, NULL, GetCurrentThreadId ()); if (hMouse == 0) { handleWin32Error (0, SRC_POS); goto error; } if (!CryptAcquireContext (&hCryptProv, NULL, MS_ENHANCED_PROV, PROV_RSA_FULL, CRYPT_VERIFYCONTEXT | CRYPT_SILENT)) { CryptoAPIAvailable = FALSE; CryptoAPILastError = GetLastError (); goto error; } else CryptoAPIAvailable = TRUE; if (!(PeriodicFastPollThreadHandle = (HANDLE) _beginthreadex (NULL, 0, PeriodicFastPollThreadProc, NULL, 0, NULL))) goto error; return 0; error: dwLastError = GetLastError(); RandStop (TRUE); SetLastError (dwLastError); 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; CryptoAPILastError = ERROR_SUCCESS; } hMouse = NULL; hKeyboard = NULL; bThreadTerminate = FALSE; DeleteCriticalSection (&critRandProt); bRandDidInit = FALSE; freePool: if (freePool) { bDidSlowPoll = FALSE; RandomPoolEnrichedByUser = FALSE; if (pRandPool != NULL) { burn (pRandPool, RANDOMPOOL_ALLOCSIZE); _aligned_free (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; sha256_ctx s256ctx; STREEBOG_CTX stctx; int poolIndex, digestIndex, digestSize; switch (HashFunction) { case RIPEMD160: digestSize = RIPEMD160_DIGESTSIZE; break; case SHA512: digestSize = SHA512_DIGESTSIZE; break; case SHA256: digestSize = SHA256_DIGESTSIZE; break; case WHIRLPOOL: digestSize = WHIRLPOOL_DIGESTSIZE; break; case STREEBOG: digestSize = STREEBOG_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 SHA256: sha256_begin (&s256ctx); sha256_hash (pRandPool, RNG_POOL_SIZE, &s256ctx); sha256_end (hashOutputBuffer, &s256ctx); break; case WHIRLPOOL: WHIRLPOOL_init (&wctx); WHIRLPOOL_add (pRandPool, RNG_POOL_SIZE, &wctx); WHIRLPOOL_finalize (&wctx, hashOutputBuffer); break; case STREEBOG: STREEBOG_init (&stctx); STREEBOG_add (&stctx, pRandPool, RNG_POOL_SIZE); STREEBOG_finalize (&stctx, 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 SHA256: burn (&s256ctx, sizeof(s256ctx)); break; case WHIRLPOOL: burn (&wctx, sizeof(wctx)); break; case STREEBOG: burn (&stctx, sizeof(sctx)); 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 (void* hwndDlg, unsigned char *buf, int len, DWORD* mouseCounter) { if (!bRandDidInit) return FALSE; if (len > RNG_POOL_SIZE) { Error ("ERR_NOT_ENOUGH_RANDOM_DATA", (HWND) hwndDlg); len = RNG_POOL_SIZE; } EnterCriticalSection (&critRandProt); *mouseCounter = ProcessedMouseEventsCounter; 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 (void* hwndDlg, unsigned char *buf, int len, BOOL forceSlowPoll) { return RandgetBytesFull (hwndDlg, buf, len, forceSlowPoll, FALSE); } /* Get len random bytes from the pool. * If allowAnyLength is FALSE, then len must be less or equal to RNG_POOL_SIZE * If allowAnyLength is TRUE, then len can have any positive value */ BOOL RandgetBytesFull ( void* hwndDlg, unsigned char *buf , int len, BOOL forceSlowPoll , BOOL allowAnyLength) { int i, looplen; BOOL ret = TRUE; if (!bRandDidInit || HashFunction == 0) TC_THROW_FATAL_EXCEPTION; EnterCriticalSection (&critRandProt); if (bDidSlowPoll == FALSE || forceSlowPoll) { if (!SlowPoll ()) { handleError ((HWND) hwndDlg, ERR_CAPI_INIT_FAILED, SRC_POS); ret = FALSE; } else bDidSlowPoll = TRUE; } if (!FastPoll ()) { handleError ((HWND) hwndDlg, ERR_CAPI_INIT_FAILED, SRC_POS); ret = FALSE; } /* There's never more than RNG_POOL_SIZE worth of randomess */ if ( (!allowAnyLength) && (len > RNG_POOL_SIZE)) { Error ("ERR_NOT_ENOUGH_RANDOM_DATA", (HWND) hwndDlg); len = RNG_POOL_SIZE; LeaveCriticalSection (&critRandProt); return FALSE; } while (len > 0) { if (len > RNG_POOL_SIZE) { looplen = RNG_POOL_SIZE; len -= RNG_POOL_SIZE; } else { looplen = len; len = 0; } // this loop 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 < looplen; 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 < looplen; i++) { buf[i] ^= pRandPool[randPoolReadIndex++]; if (randPoolReadIndex == RNG_POOL_SIZE) randPoolReadIndex = 0; } // increment the pointer for the next loop buf += looplen; } 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; static POINT lastPoint; 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; POINT pt = lpMouse->pt; 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); /* only count real mouse messages in entropy estimation */ if ( (nCode == HC_ACTION) && (wParam == WM_MOUSEMOVE) && ((pt.x != lastPoint.x) || (pt.y != lastPoint.y))) { ProcessedMouseEventsCounter++; lastPoint = pt; } 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) (GetCrc32((unsigned char*) &lParam, sizeof(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) { UNREFERENCED_PARAMETER (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, L"SYSTEM\\CurrentControlSet\\Control\\ProductOptions", 0, KEY_READ, &hKey) == ERROR_SUCCESS) { wchar_t szValue[32]; dwSize = sizeof (szValue); isWorkstation = TRUE; status = RegQueryValueEx (hKey, L"ProductType", 0, NULL, (LPBYTE) szValue, &dwSize); if (status == ERROR_SUCCESS && _wcsicmp (szValue, L"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 */ wchar_t dllPath[MAX_PATH]; if (GetSystemDirectory (dllPath, MAX_PATH)) { StringCchCatW(dllPath, ARRAYSIZE(dllPath), L"\\NETAPI32.DLL"); } else StringCchCopyW(dllPath, ARRAYSIZE(dllPath), L"C:\\Windows\\System32\\NETAPI32.DLL"); hNetAPI32 = LoadLibrary (dllPath); 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; wchar_t szDevice[24]; /* Check whether we can access this device */ StringCchPrintfW (szDevice, ARRAYSIZE(szDevice), L"\\\\.\\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: We always have a valid CryptoAPI context when we arrive here but // we keep the check for clarity purpose if ( !CryptoAPIAvailable ) return FALSE; if (CryptGenRandom (hCryptProv, sizeof (buffer), buffer)) { RandaddBuf (buffer, sizeof (buffer)); burn(buffer, sizeof (buffer)); Randmix(); return TRUE; } else { /* return error in case CryptGenRandom fails */ CryptoAPILastError = GetLastError (); return FALSE; } } /* 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; SIZE_T minimumWorkingSetSize, maximumWorkingSetSize; LARGE_INTEGER performanceCount; MEMORYSTATUS memoryStatus; HANDLE handle; POINT point; /* Get various basic pieces of system information */ RandaddIntPtr (GetActiveWindow ()); /* Handle of active window */ RandaddIntPtr (GetCapture ()); /* Handle of window with mouse capture */ RandaddIntPtr (GetClipboardOwner ()); /* Handle of clipboard owner */ RandaddIntPtr (GetClipboardViewer ()); /* Handle of start of clpbd.viewer list */ RandaddIntPtr (GetCurrentProcess ()); /* Pseudohandle of current process */ RandaddInt32 (GetCurrentProcessId ()); /* Current process ID */ RandaddIntPtr (GetCurrentThread ()); /* Pseudohandle of current thread */ RandaddInt32 (GetCurrentThreadId ()); /* Current thread ID */ RandaddInt32 (GetCurrentTime ()); /* Milliseconds since Windows started */ RandaddIntPtr (GetDesktopWindow ()); /* Handle of desktop window */ RandaddIntPtr (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 */ RandaddIntPtr (GetOpenClipboardWindow ()); /* Handle of window with clpbd.open */ RandaddIntPtr (GetProcessHeap ()); /* Handle of process heap */ RandaddIntPtr (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); RandaddIntPtr (minimumWorkingSetSize); RandaddIntPtr (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: We always have a valid CryptoAPI context when we arrive here but // we keep the check for clarity purpose if ( !CryptoAPIAvailable ) return FALSE; if (CryptGenRandom (hCryptProv, sizeof (buffer), buffer)) { RandaddBuf (buffer, sizeof (buffer)); burn (buffer, sizeof(buffer)); } else { /* return error in case CryptGenRandom fails */ CryptoAPILastError = GetLastError (); return FALSE; } /* 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; } href='#n651'>651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368