VeraCrypt
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<title>VeraCrypt - Бесплатное надёжное шифрование дисков с открытым исходным кодом</title>
<meta name="description" content="VeraCrypt это бесплатное программное обеспечение для шифрования дисков с открытым исходным кодом для Windows, Mac OS X (macOS) и Linux. В случае, если злоумышленник вынуждает вас раскрыть пароль, VeraCrypt обеспечивает правдоподобное отрицание наличия шифрования. В отличие от пофайлового шифрования, VeraCrypt шифрует данные в реальном времени (на лету), автоматически, прозрачно, требует очень мало памяти и не использует временные незашифрованные файлы."/>
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<img src="arrow_right.gif" alt=">>" style="margin-top: 5px">
<a href="VeraCrypt%20Volume.html">Том VeraCrypt</a>
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<h2>Авторы</h2>
<p>Mounir IDRASSI (<a href="https://www.idrix.fr" target="_blank">IDRIX</a>, <a href="https://fr.linkedin.com/in/idrassi" target="_blank">
https://fr.linkedin.com/in/idrassi</a>) – создатель и главный разработчик VeraCrypt. Руководит всеми аспектами
разработки и развёртывания на всех поддерживаемых платформах (Windows, Linux и macOS).</p>
<p>Алекс Колотников (<a href="https://ru.linkedin.com/in/alex-kolotnikov-6625568b" target="_blank">https://ru.linkedin.com/in/alex-kolotnikov-6625568b</a>) – автор
EFI-загрузчика VeraCrypt. Отвечает за все аспекты поддержки EFI, а его обширный опыт помогает внедрять новые
интересные функции в системное Windows-шифрование VeraCrypt.</p>
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nclude "Dlgcode.h" #include "Language.h" #include "Progress.h" #include "Resource.h" #include "InitDataArea.h" #ifndef SRC_POS #define SRC_POS (__FUNCTION__ ":" TC_TO_STRING(__LINE__)) #endif int FormatWriteBufferSize = 1024 * 1024; static uint32 FormatSectorSize = 0; void SetFormatSectorSize(uint32 sector_size) { FormatSectorSize = sector_size; } int FormatNoFs (HWND hwndDlg, unsigned __int64 startSector, __int64 num_sectors, void * dev, PCRYPTO_INFO cryptoInfo, BOOL quickFormat) { int write_buf_cnt = 0; char sector[TC_MAX_VOLUME_SECTOR_SIZE], *write_buf; unsigned __int64 nSecNo = startSector; int retVal = 0; DWORD err; CRYPTOPP_ALIGN_DATA(16) char temporaryKey[MASTER_KEYDATA_SIZE]; CRYPTOPP_ALIGN_DATA(16) char originalK2[MASTER_KEYDATA_SIZE]; LARGE_INTEGER startOffset; LARGE_INTEGER newOffset; // Seek to start sector startOffset.QuadPart = startSector * FormatSectorSize; if (!SetFilePointerEx ((HANDLE) dev, startOffset, &newOffset, FILE_BEGIN) || newOffset.QuadPart != startOffset.QuadPart) { return ERR_OS_ERROR; } write_buf = (char *)TCalloc (FormatWriteBufferSize); if (!write_buf) return ERR_OUTOFMEMORY; VirtualLock (temporaryKey, sizeof (temporaryKey)); VirtualLock (originalK2, sizeof (originalK2)); memset (sector, 0, sizeof (sector)); // Remember the original secondary key (XTS mode) before generating a temporary one memcpy (originalK2, cryptoInfo->k2, sizeof (cryptoInfo->k2)); /* Fill the rest of the data area with random data */ if(!quickFormat) { /* Generate a random temporary key set to be used for "dummy" encryption that will fill the free disk space (data area) with random data. This is necessary for plausible deniability of hidden volumes. */ // Temporary master key if (!RandgetBytes (hwndDlg, temporaryKey, EAGetKeySize (cryptoInfo->ea), FALSE)) goto fail; // Temporary secondary key (XTS mode) if (!RandgetBytes (hwndDlg, cryptoInfo->k2, sizeof cryptoInfo->k2, FALSE)) goto fail; retVal = EAInit (cryptoInfo->ea, temporaryKey, cryptoInfo->ks); if (retVal != ERR_SUCCESS) goto fail; if (!EAInitMode (cryptoInfo)) { retVal = ERR_MODE_INIT_FAILED; goto fail; } while (num_sectors--) { if (WriteSector (dev, sector, write_buf, &write_buf_cnt, &nSecNo, cryptoInfo) == FALSE) goto fail; } if (!FlushFormatWriteBuffer (dev, write_buf, &write_buf_cnt, &nSecNo, cryptoInfo)) goto fail; } else nSecNo = num_sectors; UpdateProgressBar (nSecNo * FormatSectorSize); // Restore the original secondary key (XTS mode) in case NTFS format fails and the user wants to try FAT immediately memcpy (cryptoInfo->k2, originalK2, sizeof (cryptoInfo->k2)); // Reinitialize the encryption algorithm and mode in case NTFS format fails and the user wants to try FAT immediately retVal = EAInit (cryptoInfo->ea, cryptoInfo->master_keydata, cryptoInfo->ks); if (retVal != ERR_SUCCESS) goto fail; if (!EAInitMode (cryptoInfo)) { retVal = ERR_MODE_INIT_FAILED; goto fail; } burn (temporaryKey, sizeof(temporaryKey)); burn (originalK2, sizeof(originalK2)); VirtualUnlock (temporaryKey, sizeof (temporaryKey)); VirtualUnlock (originalK2, sizeof (originalK2)); TCfree (write_buf); return 0; fail: err = GetLastError(); burn (temporaryKey, sizeof(temporaryKey)); burn (originalK2, sizeof(originalK2)); VirtualUnlock (temporaryKey, sizeof (temporaryKey)); VirtualUnlock (originalK2, sizeof (originalK2)); TCfree (write_buf); SetLastError (err); return (retVal ? retVal : ERR_OS_ERROR); } BOOL WriteSector (void *dev, char *sector, char *write_buf, int *write_buf_cnt, __int64 *nSecNo, PCRYPTO_INFO cryptoInfo) { static __int32 updateTime = 0; (*nSecNo)++; memcpy (write_buf + *write_buf_cnt, sector, FormatSectorSize); (*write_buf_cnt) += FormatSectorSize; if (*write_buf_cnt == FormatWriteBufferSize && !FlushFormatWriteBuffer (dev, write_buf, write_buf_cnt, nSecNo, cryptoInfo)) return FALSE; if (GetTickCount () - updateTime > 25) { if (UpdateProgressBar (*nSecNo * FormatSectorSize)) return FALSE; updateTime = GetTickCount (); } return TRUE; } static volatile BOOL WriteThreadRunning; static volatile BOOL WriteThreadExitRequested; static HANDLE WriteThreadHandle; static byte *WriteThreadBuffer; static HANDLE WriteBufferEmptyEvent; static HANDLE WriteBufferFullEvent; static volatile HANDLE WriteRequestHandle; static volatile int WriteRequestSize; static volatile DWORD WriteRequestResult; static void __cdecl FormatWriteThreadProc (void *arg) { DWORD bytesWritten; SetThreadPriority (GetCurrentThread(), THREAD_PRIORITY_HIGHEST); while (!WriteThreadExitRequested) { if (WaitForSingleObject (WriteBufferFullEvent, INFINITE) == WAIT_FAILED) { handleWin32Error (NULL, SRC_POS); break; } if (WriteThreadExitRequested) break; if (!WriteFile (WriteRequestHandle, WriteThreadBuffer, WriteRequestSize, &bytesWritten, NULL)) WriteRequestResult = GetLastError(); else WriteRequestResult = ERROR_SUCCESS; if (!SetEvent (WriteBufferEmptyEvent)) { handleWin32Error (NULL, SRC_POS); break; } } WriteThreadRunning = FALSE; _endthread(); } BOOL StartFormatWriteThread () { DWORD sysErr; WriteBufferEmptyEvent = NULL; WriteBufferFullEvent = NULL; WriteThreadBuffer = NULL; WriteBufferEmptyEvent = CreateEvent (NULL, FALSE, TRUE, NULL); if (!WriteBufferEmptyEvent) goto err; WriteBufferFullEvent = CreateEvent (NULL, FALSE, FALSE, NULL); if (!WriteBufferFullEvent) goto err; WriteThreadBuffer = TCalloc (FormatWriteBufferSize); if (!WriteThreadBuffer) { SetLastError (ERROR_OUTOFMEMORY); goto err; } WriteThreadExitRequested = FALSE; WriteRequestResult = ERROR_SUCCESS; WriteThreadHandle = (HANDLE) _beginthread (FormatWriteThreadProc, 0, NULL); if ((uintptr_t) WriteThreadHandle == -1L) goto err; WriteThreadRunning = TRUE; return TRUE; err: sysErr = GetLastError(); if (WriteBufferEmptyEvent) CloseHandle (WriteBufferEmptyEvent); if (WriteBufferFullEvent) CloseHandle (WriteBufferFullEvent); if (WriteThreadBuffer) TCfree (WriteThreadBuffer); SetLastError (sysErr); return FALSE; } void StopFormatWriteThread () { if (WriteThreadRunning) { WaitForSingleObject (WriteBufferEmptyEvent, INFINITE); WriteThreadExitRequested = TRUE; SetEvent (WriteBufferFullEvent); WaitForSingleObject (WriteThreadHandle, INFINITE); } CloseHandle (WriteBufferEmptyEvent); CloseHandle (WriteBufferFullEvent); TCfree (WriteThreadBuffer); } BOOL FlushFormatWriteBuffer (void *dev, char *write_buf, int *write_buf_cnt, __int64 *nSecNo, PCRYPTO_INFO cryptoInfo) { UINT64_STRUCT unitNo; DWORD bytesWritten; if (*write_buf_cnt == 0) return TRUE; unitNo.Value = (*nSecNo * FormatSectorSize - *write_buf_cnt) / ENCRYPTION_DATA_UNIT_SIZE; EncryptDataUnits (write_buf, &unitNo, *write_buf_cnt / ENCRYPTION_DATA_UNIT_SIZE, cryptoInfo); if (WriteThreadRunning) { if (WaitForSingleObject (WriteBufferEmptyEvent, INFINITE) == WAIT_FAILED) return FALSE; if (WriteRequestResult != ERROR_SUCCESS) { SetEvent (WriteBufferEmptyEvent); SetLastError (WriteRequestResult); return FALSE; } memcpy (WriteThreadBuffer, write_buf, *write_buf_cnt); WriteRequestHandle = dev; WriteRequestSize = *write_buf_cnt; if (!SetEvent (WriteBufferFullEvent)) return FALSE; } else { if (!WriteFile ((HANDLE) dev, write_buf, *write_buf_cnt, &bytesWritten, NULL)) return FALSE; } *write_buf_cnt = 0; return TRUE; }