/*
ExpandVolume
Sets the volume size in the volume header (and backup header) to a larger value,
and resizes the filesystem within the volume (only NTFS supported)
Parameters:
hwndDlg : HWND
[in] handle to progress dialog
lpszVolume : char *
[in] Pointer to a string that contains the path to the truecrypt volume
pVolumePassword : Password *
[in] Pointer to the volume password
newHostSize : uint64
[in] new value of the volume host size (can be zero for devices,
which means the volume should use all space of the host device)
initFreeSpace : BOOL
[in] if true, the new volume space will be initalized with random data
Return value:
int with Truecrypt error code (ERR_SUCCESS on success)
Remarks: a lot of code is from TrueCrypt 'Common\Password.c' :: ChangePwd()
*/
static int ExpandVolume (HWND hwndDlg, wchar_t *lpszVolume, Password *pVolumePassword, int VolumePkcs5, int VolumePim, uint64 newHostSize, BOOL initFreeSpace)
{
int nDosLinkCreated = 1, nStatus = ERR_OS_ERROR;
wchar_t szDiskFile[TC_MAX_PATH], szCFDevice[TC_MAX_PATH];
wchar_t szDosDevice[TC_MAX_PATH];
char buffer[TC_VOLUME_HEADER_EFFECTIVE_SIZE];
PCRYPTO_INFO cryptoInfo = NULL, ci = NULL;
void *dev = INVALID_HANDLE_VALUE;
DWORD dwError;
BOOL bDevice;
uint64 hostSize=0, newDataAreaSize, currentVolSize;
DWORD HostSectorSize;
FILETIME ftCreationTime;
FILETIME ftLastWriteTime;
FILETIME ftLastAccessTime;
BOOL bTimeStampValid = FALSE;
LARGE_INTEGER headerOffset;
BOOL backupHeader;
byte *wipeBuffer = NULL;
uint32 workChunkSize = TC_VOLUME_HEADER_GROUP_SIZE;
if (pVolumePassword->Length == 0) return -1;
WaitCursor ();
CreateFullVolumePath (szDiskFile, sizeof(szDiskFile), lpszVolume, &bDevice);
if (bDevice == FALSE)
{
wcscpy (szCFDevice, szDiskFile);
}
else
{
nDosLinkCreated = FakeDosNameForDevice (szDiskFile, szDosDevice, sizeof(szDosDevice), szCFDevice, sizeof(szCFDevice), FALSE);
if (nDosLinkCreated != 0) // note: nStatus == ERR_OS_ERROR
goto error;
}
dev = CreateFile (szCFDevice, GENERIC_READ | GENERIC_WRITE, FILE_SHARE_READ | FILE_SHARE_WRITE, NULL, OPEN_EXISTING, 0, NULL);
if (dev == INVALID_HANDLE_VALUE)
goto error;
if (bDevice)
{
/* This is necessary to determine the hidden volume header offset */
if (dev == INVALID_HANDLE_VALUE)
{
goto error;
}
else
{
PARTITION_INFORMATION diskInfo;
DWORD dwResult;
BOOL bResult;
bResult = GetPartitionInfo (lpszVolume, &diskInfo);
if (bResult)
{
hostSize = diskInfo.PartitionLength.QuadPart;
HostSectorSize = TC_SECTOR_SIZE_FILE_HOSTED_VOLUME; //TO DO: get the real host disk sector size
}
else
{
DISK_GEOMETRY driveInfo;
bResult = DeviceIoControl (dev, IOCTL_DISK_GET_DRIVE_GEOMETRY, NULL, 0,
&driveInfo, sizeof (driveInfo), &dwResult, NULL);
if (!bResult)
goto error;
hostSize = driveInfo.Cylinders.QuadPart * driveInfo.BytesPerSector *
driveInfo.SectorsPerTrack * driveInfo.TracksPerCylinder;
HostSectorSize = driveInfo.BytesPerSector;
}
if (hostSize == 0)
{
nStatus = ERR_VOL_SIZE_WRONG;
goto error;
}
}
}
else
{
LARGE_INTEGER fileSize;
if (!GetFileSizeEx (dev, &fileSize))
{
nStatus = ERR_OS_ERROR;
goto error;
}
hostSize = fileSize.QuadPart;
HostSectorSize = TC_SECTOR_SIZE_FILE_HOSTED_VOLUME; //TO DO: get the real host disk sector size
}
if (Randinit ())
{
if (CryptoAPILastError == ERROR_SUCCESS)
nStatus = ERR_RAND_INIT_FAILED;
else
nStatus = ERR_CAPI_INIT_FAILED;
goto error;
}
if (!bDevice && bPreserveTimestamp)
{
/* Remember the container modification/creation date and time, (used to reset file date and time of
file-hosted volumes after password change (or attempt to), in order to preserve plausible deniability
of hidden volumes (last password change time is stored in the volume header). */
if (GetFileTime ((HANDLE) dev, &ftCreationTime, &ftLastAccessTime, &ftLastWriteTime) == 0)
{
bTimeStampValid = FALSE;
MessageBoxW (hwndDlg, GetString ("GETFILETIME_FAILED_PW"), lpszTitle, MB_OK | MB_ICONEXCLAMATION);
}
else
bTimeStampValid = TRUE;
}
// Seek the volume header
headerOffset.QuadPart = TC_VOLUME_HEADER_OFFSET;
if (!SetFilePointerEx ((HANDLE) dev, headerOffset, NULL, FILE_BEGIN))
{
nStatus = ERR_OS_ERROR;
goto error;
}
/* Read in volume header */
nStatus = _lread ((HFILE) dev, buffer, sizeof (buffer));
if (nStatus != sizeof (buffer))
{
// Windows may report EOF when reading sectors from the last cluster of a device formatted as NTFS
memset (buffer, 0, sizeof (buffer));
}
/* Try to decrypt the header */
nStatus = ReadVolumeHeader (FALSE, buffer, pVolumePassword, VolumePkcs5, VolumePim, FALSE, &cryptoInfo, NULL);
if (nStatus == ERR_CIPHER_INIT_WEAK_KEY)
nStatus = 0; // We can ignore this error here
if (nStatus != 0)
{
cryptoInfo = NULL;
goto error;
}
if (cryptoInfo->HeaderFlags & TC_HEADER_FLAG_ENCRYPTED_SYSTEM)
{
nStatus = ERR_SYS_HIDVOL_HEAD_REENC_MODE_WRONG;
goto error;
}
if (bDevice && newHostSize == 0)
{
// this means we shall take all host space as new volume size
newHostSize = hostSize;
}
if ( newHostSize % cryptoInfo->SectorSize != 0 || newHostSize > TC_MAX_VOLUME_SIZE || (bDevice && newHostSize > hostSize) )
{
// 1. must be multiple of sector size
// 2. truecrypt volume size limit
// 3. for devices volume size can't be larger than host size
cryptoInfo = NULL;
nStatus = ERR_PARAMETER_INCORRECT;
goto error;
}
newDataAreaSize = GetVolumeDataAreaSize (newHostSize, cryptoInfo->LegacyVolume);
if (cryptoInfo->LegacyVolume)
{
if (bDevice)
{
if (initFreeSpace)
{
// unsupported
cryptoInfo = NULL;
nStatus = ERR_PARAMETER_INCORRECT;
goto error;
}
else
{
// note: dummy value (only used for parameter checks)
cryptoInfo->VolumeSize.Value = newDataAreaSize - TC_MINVAL_FS_EXPAND;
}
}
else
{
cryptoInfo->VolumeSize.Value = GetVolumeDataAreaSize (hostSize, TRUE);
}
}
currentVolSize = GetVolumeSizeByDataAreaSize (cryptoInfo->VolumeSize.Value, cryptoInfo->LegacyVolume);
if ( newDataAreaSize < cryptoInfo->VolumeSize.Value + TC_MINVAL_FS_EXPAND )
{
// shrinking a volume or enlarging by less then TC_MINVAL_FS_EXPAND is not allowed
cryptoInfo = NULL;
nStatus = ERR_PARAMETER_INCORRECT;
goto error;
}
InitProgressBar ( newHostSize, currentVolSize, FALSE, FALSE, FALSE, TRUE);
if (bVolTransformThreadCancel)
{
SetLastError(0);
nStatus = ERR_USER_ABORT;
goto error;
}
if (!bDevice) {
LARGE_INTEGER liNewSize;
liNewSize.QuadPart=(LONGLONG)newHostSize;
// Preallocate the file
if (!SetFilePointerEx (dev, liNewSize, NULL, FILE_BEGIN)
|| !SetEndOfFile (dev)
|| SetFilePointer (dev, 0, NULL, FILE_BEGIN) != 0)
{
nStatus = ERR_OS_ERROR;
goto error;
}
}
if (initFreeSpace)
{
uint64 startSector;
int64 num_sectors;
// fill new space with random data
startSector = currentVolSize/HostSectorSize ;
num_sectors = (newHostSize/HostSectorSize) - startSector;
if (bDevice && !StartFormatWriteThread())
{
nStatus = ERR_OS_ERROR;
goto error;
}
DebugAddProgressDlgStatus(hwndDlg, L"Writing random data to new space ...\r\n");
SetFormatSectorSize(HostSectorSize);
nStatus = FormatNoFs (hwndDlg, startSector, num_sectors, dev, cryptoInfo, FALSE);
dwError = GetLastError();
StopFormatWriteThread();
SetLastError (dwError);
}
else
{
UpdateProgressBar(newHostSize);
}
if (nStatus != ERR_SUCCESS)
{
dwError = GetLastError();
DebugAddProgressDlgStatus(hwndDlg, L"Error: failed to write random data ...\r\n");
if ( !bDevice ) {
// restore original size of the container file
LARGE_INTEGER liOldSize;
liOldSize.QuadPart=(LONGLONG)hostSize;
if (!SetFilePointerEx (dev, liOldSize, NULL, FILE_BEGIN) || !SetEndOfFile (dev))
{
DebugAddProgressDlgStatus(hwndDlg, L"Warning: failed to restore original size of the container file\r\n");
}
}
SetLastError (dwError);
goto error;
}
RandSetHashFunction (cryptoInfo->pkcs5);
// Re-encrypt the volume header forn non-legacy volumes: backup header first
backupHeader = TRUE;
headerOffset.QuadPart = TC_VOLUME_HEADER_OFFSET + newHostSize - TC_VOLUME_HEADER_GROUP_SIZE;
/* note: updating the header is not neccessary for legay volumes */
while ( !cryptoInfo->LegacyVolume )
{
if (backupHeader)
DebugAddProgressDlgStatus(hwndDlg, L"Writing re-encrypted backup header ...\r\n");
else
DebugAddProgressDlgStatus(hwndDlg, L"Writing re-encrypted primary header ...\r\n");
// Prepare new volume header
nStatus = CreateVolumeHeaderInMemory (hwndDlg, FALSE,
buffer,
cryptoInfo->ea,
cryptoInfo->mode,
pVolumePassword,
cryptoInfo->pkcs5,
VolumePim,
(char*)(cryptoInfo->master_keydata),
&ci,
newDataAreaSize,
0, // hiddenVolumeSize
cryptoInfo->EncryptedAreaStart.Value,
newDataAreaSize,
cryptoInfo->RequiredProgramVersion,
cryptoInfo->HeaderFlags,
cryptoInfo->SectorSize,
TRUE ); // use slow poll
if (ci != NULL)
crypto_close (ci);
if (nStatus != 0)
goto error;
if (!SetFilePointerEx ((HANDLE) dev, headerOffset, NULL, FILE_BEGIN))
{
nStatus = ERR_OS_ERROR;
goto error;
}
nStatus = _lwrite ((HFILE) dev, buffer, TC_VOLUME_HEADER_EFFECTIVE_SIZE);
if (nStatus != TC_VOLUME_HEADER_EFFECTIVE_SIZE)
{
nStatus = ERR_OS_ERROR;
goto error;
}
if ( ( backupHeader && !initFreeSpace )
|| ( bDevice
&& !cryptoInfo->LegacyVolume
&& !cryptoInfo->hiddenVolume
&& cryptoInfo->HeaderVersion == 4 // BUG in TrueCrypt: doing this only for v4 make no sense
&& (cryptoInfo->HeaderFlags & TC_HEADER_FLAG_NONSYS_INPLACE_ENC) != 0
&& (cryptoInfo->HeaderFlags & ~TC_HEADER_FLAG_NONSYS_INPLACE_ENC) == 0 )
)
{
//DebugAddProgressDlgStatus(hwndDlg, L"WriteRandomDataToReservedHeaderAreas() ...\r\n");
nStatus = WriteRandomDataToReservedHeaderAreas (hwndDlg, dev, cryptoInfo, newDataAreaSize, !backupHeader, backupHeader);
if (nStatus != ERR_SUCCESS)
goto error;
}
FlushFileBuffers (dev);
if (!backupHeader)
break;
backupHeader = FALSE;
headerOffset.QuadPart = TC_VOLUME_HEADER_OFFSET; // offset for main header
}
/* header successfully updated */
nStatus = ERR_SUCCESS;
if (bVolTransformThreadCancel)
{
nStatus = ERR_USER_ABORT;
goto error;
}
/* wipe old backup header */
if ( !cryptoInfo->LegacyVolume )
{
byte wipeRandChars [TC_WIPE_RAND_CHAR_COUNT];
byte wipeRandCharsUpdate [TC_WIPE_RAND_CHAR_COUNT];
byte wipePass;
UINT64_STRUCT unitNo;
LARGE_INTEGER offset;
WipeAlgorithmId wipeAlgorithm = TC_WIPE_35_GUTMANN;
if ( !RandgetBytes (hwndDlg, wipeRandChars, TC_WIPE_RAND_CHAR_COUNT, TRUE)
|| !RandgetBytes (hwndDlg, wipeRandCharsUpdate, TC_WIPE_RAND_CHAR_COUNT, TRUE)
)
{
nStatus = ERR_OS_ERROR;
goto error;
}
DebugAddProgressDlgStatus(hwndDlg, L"Wiping old backup header ...\r\n");
wipeBuffer = (byte *) TCalloc (workChunkSize);
if (!wipeBuffer)
{
nStatus = ERR_OUTOFMEMORY;
goto error;
}
offset.QuadPart = currentVolSize - TC_VOLUME_HEADER_GROUP_SIZE;
unitNo.Value = offset.QuadPart;
for (wipePass = 1; wipePass <= GetWipePassCount (wipeAlgorithm); ++wipePass)
{
if (!WipeBuffer (wipeAlgorithm, wipeRandChars, wipePass, wipeBuffer, workChunkSize))
{
ULONG i;
for (i = 0; i < workChunkSize; ++i)
{
wipeBuffer[i] = wipePass;
}
EncryptDataUnits (wipeBuffer, &unitNo, workChunkSize / ENCRYPTION_DATA_UNIT_SIZE, cryptoInfo);
memcpy (wipeRandCharsUpdate, wipeBuffer, sizeof (wipeRandCharsUpdate));
}
if ( !SetFilePointerEx (dev, offset, NULL, FILE_BEGIN)
|| _lwrite ((HFILE)dev, (LPCSTR)wipeBuffer, workChunkSize) == HFILE_ERROR
)
{
// Write error
DebugAddProgressDlgStatus(hwndDlg, L"Warning: Failed to wipe old backup header\r\n");
MessageBoxW (hwndDlg, L"WARNING: Failed to wipe old backup header!\n\nIt may be possible to use the current volume password to decrypt the old backup header even after a future password change.\n", lpszTitle, MB_OK | MB_ICONEXCLAMATION);
if (wipePass == 1)
continue; // retry once
// non-critical error - it's better to continue
nStatus = ERR_SUCCESS;
goto error;
}
FlushFileBuffers(dev);
// we don't check FlushFileBuffers() return code, because it fails for devices
// (same implementation in password.c - a bug or not ???)
}
burn (wipeRandChars, TC_WIPE_RAND_CHAR_COUNT);
burn (wipeRandCharsUpdate, TC_WIPE_RAND_CHAR_COUNT);
}
error:
dwError = GetLastError ();
if (wipeBuffer)
{
burn (wipeBuffer, workChunkSize);
TCfree (wipeBuffer);
wipeBuffer = NULL;
}
burn (buffer, sizeof (buffer));
if (cryptoInfo != NULL)
crypto_close (cryptoInfo);
if (bTimeStampValid)
{
// Restore the container timestamp (to preserve plausible deniability of possible hidden volume).
if (SetFileTime (dev, &ftCreationTime, &ftLastAccessTime, &ftLastWriteTime) == 0)
MessageBoxW (hwndDlg, GetString ("SETFILETIME_FAILED_PW"), lpszTitle, MB_OK | MB_ICONEXCLAMATION);
}
if (dev != INVALID_HANDLE_VALUE)
CloseHandle ((HANDLE) dev);
if (nDosLinkCreated == 0)
RemoveFakeDosName (szDiskFile, szDosDevice);
RandStop (FALSE);
if (bVolTransformThreadCancel)
nStatus = ERR_USER_ABORT;
SetLastError (dwError);
if (nStatus == ERR_SUCCESS)
{
nStatus = ExtendFileSystem (hwndDlg, lpszVolume, pVolumePassword, VolumePkcs5, VolumePim, newDataAreaSize);
}
return nStatus;
}
/*
ExpandVolumeWizard
Expands a trucrypt volume (wizard for user interface)
Parameters:
hwndDlg : HWND
[in] handle to parent window (if any)
szVolume : char *
[in] Pointer to a string with the volume name (e.g. '\Device\Harddisk0\Partition1' or 'C:\topsecret.tc')
Return value:
none
*/
void ExpandVolumeWizard (HWND hwndDlg, char *lpszVolume)
{
int nStatus = ERR_OS_ERROR;
wchar_t szTmp[4096];
Password VolumePassword;
int VolumePkcs5 = 0;
uint64 hostSize, volSize, hostSizeFree, maxSizeFS;
BOOL bIsDevice, bIsLegacy;
DWORD dwError;
int driveNo;
enum EV_FileSystem volFSType;
char rootPath[] = "A:\\";
switch (IsSystemDevicePath (lpszVolume, hwndDlg, TRUE))
{
case 1:
case 2:
MessageBoxW (hwndDlg, L"A VeraCrypt system volume can't be expanded.", lpszTitle, MB_OK|MB_ICONEXCLAMATION);
goto ret;
}
EnableElevatedCursorChange (hwndDlg);
WaitCursor();
if (IsMountedVolume (lpszVolume))
{
Warning ("DISMOUNT_FIRST", hwndDlg);
goto ret;
}
if (Randinit() != ERR_SUCCESS) {
nStatus = ERR_PARAMETER_INCORRECT;
goto error;
}
NormalCursor();
// Ask the user if there is a hidden volume
char *volTypeChoices[] = {0, "DOES_VOLUME_CONTAIN_HIDDEN", "VOLUME_CONTAINS_HIDDEN", "VOLUME_DOES_NOT_CONTAIN_HIDDEN", "IDCANCEL", 0};
switch (AskMultiChoice ((void **) volTypeChoices, FALSE, hwndDlg))
{
case 1:
MessageBoxW (hwndDlg, L"An outer volume containing a hidden volume can't be expanded, because this destroys the hidden volume.", lpszTitle, MB_OK|MB_ICONEXCLAMATION);
goto ret;
case 2:
break;
default:
nStatus = ERR_SUCCESS;
goto ret;
}
WaitCursor();
nStatus = QueryVolumeInfo(hwndDlg,lpszVolume,&hostSizeFree,&maxSizeFS);
if (nStatus!=ERR_SUCCESS)
{
nStatus = ERR_OS_ERROR;
goto error;
}
NormalCursor();
while (TRUE)
{
OpenVolumeContext expandVol;
BOOL truecryptMode = FALSE;
if (!VeraCryptExpander::ExtcvAskVolumePassword (hwndDlg, &VolumePassword, &VolumePkcs5, &truecryptMode, "ENTER_NORMAL_VOL_PASSWORD", FALSE))
{
goto ret;
}
EnableElevatedCursorChange (hwndDlg);
WaitCursor();
if (KeyFilesEnable && FirstKeyFile)
KeyFilesApply (hwndDlg, &VolumePassword, FirstKeyFile);
WaitCursor ();
OpenVolumeThreadParam threadParam;
threadParam.context = &expandVol;
threadParam.volumePath = lpszVolume;
threadParam.password = &VolumePassword;
threadParam.pkcs5_prf = VolumePkcs5;
threadParam.truecryptMode = FALSE;
threadParam.write = FALSE;
threadParam.preserveTimestamps = bPreserveTimestamp;
threadParam.useBackupHeader = FALSE;
threadParam.nStatus = &nStatus;
ShowWaitDialog (hwndDlg, TRUE, OpenVolumeWaitThreadProc, &threadParam);
NormalCursor ();
dwError = GetLastError();
if (nStatus == ERR_SUCCESS)
{
bIsDevice = expandVol.IsDevice;
bIsLegacy = expandVol.CryptoInfo->LegacyVolume;
hostSize = expandVol.HostSize;
VolumePkcs5 = expandVol.CryptoInfo->pkcs5;
if ( bIsLegacy )
{
if ( bIsDevice )
volSize = 0; // updated later
else
volSize = hostSize;
}
else
{
volSize = GetVolumeSizeByDataAreaSize (expandVol.CryptoInfo->VolumeSize.Value, bIsLegacy);
}
CloseVolume (&expandVol);
break;
}
else if (nStatus != ERR_PASSWORD_WRONG)
{
SetLastError (dwError);
goto error;
}
NormalCursor();
handleError (hwndDlg, nStatus);
}
WaitCursor();
// auto mount the volume to check the file system type
nStatus=MountVolTemp(hwndDlg, lpszVolume, &driveNo, &VolumePassword, VolumePkcs5);
if (nStatus != ERR_SUCCESS)
goto error;
rootPath[0] += driveNo;
if ( !GetFileSystemType(rootPath,&volFSType) )
volFSType = EV_FS_TYPE_RAW;
if ( bIsLegacy && bIsDevice && volFSType == EV_FS_TYPE_NTFS )
{
uint64 NumberOfSectors;
DWORD BytesPerSector;
if ( !GetNtfsNumberOfSectors(rootPath, &NumberOfSectors, &BytesPerSector) )
nStatus = ERR_OS_ERROR;
// NTFS reported size does not include boot sector copy at volume end
volSize = ( NumberOfSectors + 1 ) * BytesPerSector;
}
UnmountVolume (hwndDlg, driveNo, TRUE);
NormalCursor();
if (nStatus != ERR_SUCCESS)
goto error;
if ( bIsDevice && bIsLegacy && volFSType != EV_FS_TYPE_NTFS )
{
MessageBoxW (hwndDlg,
L"Expanding a device hosted legacy volume with no NTFS file system\n"
L"is unsupported.\n"
L"Note that expanding the VeraCrypt volume itself is not neccessary\n"
L"for legacy volumes.\n",
lpszTitle, MB_OK|MB_ICONEXCLAMATION);
goto ret;
}
// check if there is enough free space on host device/drive to expand the volume
if ( (bIsDevice && hostSize < volSize + TC_MINVAL_FS_EXPAND) || (!bIsDevice && hostSizeFree < TC_MINVAL_FS_EXPAND) )
{
MessageBoxW (hwndDlg, L"Not enough free space to expand the volume", lpszTitle, MB_OK|MB_ICONEXCLAMATION);
goto ret;
}
if (!bIsDevice && hostSize != volSize ) {
// there is some junk data at the end of the volume
if (MessageBoxW (hwndDlg, L"Warning: The container file is larger than the VeraCrypt volume area. The data after the VeraCrypt volume area will be overwritten.\n\nDo you want to continue?", lpszTitle, YES_NO|MB_ICONQUESTION|MB_DEFBUTTON2) == IDNO)
goto ret;
}
switch (volFSType)
{
case EV_FS_TYPE_NTFS:
break;
case EV_FS_TYPE_FAT:
if (MessageBoxW (hwndDlg,L"Warning: The VeraCrypt volume contains a FAT file system!\n\nOnly the VeraCrypt volume itself will be expanded, but not the file system.\n\nDo you want to continue?",
lpszTitle, YES_NO|MB_ICONQUESTION|MB_DEFBUTTON2) == IDNO)
goto ret;
break;
default:
if (MessageBoxW (hwndDlg,L"Warning: The VeraCrypt volume contains an unknown or no file system!\n\nOnly the VeraCrypt volume itself will be expanded, the file system remains unchanged.\n\nDo you want to continue?",
lpszTitle, YES_NO|MB_ICONQUESTION|MB_DEFBUTTON2) == IDNO)
goto ret;
}
EXPAND_VOL_THREAD_PARAMS VolExpandParam;
VolExpandParam.bInitFreeSpace = (bIsLegacy && bIsDevice) ? FALSE:TRUE;
VolExpandParam.szVolumeName = lpszVolume;
VolExpandParam.FileSystem = volFSType;
VolExpandParam.pVolumePassword = &VolumePassword;
VolExpandParam.VolumePkcs5 = VolumePkcs5;
VolExpandParam.bIsDevice = bIsDevice;
VolExpandParam.bIsLegacy = bIsLegacy;
VolExpandParam.oldSize = bIsDevice ? volSize : hostSize;
VolExpandParam.newSize = hostSize;
VolExpandParam.hostSizeFree = hostSizeFree;
while (1)
{
uint64 newVolumeSize;
if (IDCANCEL == DialogBoxParamW (hInst,
MAKEINTRESOURCEW (IDD_SIZE_DIALOG), hwndDlg,
(DLGPROC) ExpandVolSizeDlgProc, (LPARAM) &VolExpandParam))
{
goto ret;
}
newVolumeSize = VolExpandParam.newSize;
if ( !bIsDevice )
{
if ( newVolumeSize < hostSize + TC_MINVAL_FS_EXPAND)
{
swprintf(szTmp,L"New volume size too small, must be at least %I64u kB larger than the current size.",TC_MINVAL_FS_EXPAND/BYTES_PER_KB);
MessageBoxW (hwndDlg, szTmp, lpszTitle, MB_OK | MB_ICONEXCLAMATION );
continue;
}
if ( newVolumeSize - hostSize > hostSizeFree )
{
swprintf(szTmp,L"New volume size too large, not enough space on host drive.");
MessageBoxW (hwndDlg, szTmp, lpszTitle, MB_OK | MB_ICONEXCLAMATION );
continue;
}
if ( newVolumeSize>maxSizeFS )
{
swprintf(szTmp,L"Maximum file size of %I64u MB on host drive exceeded.",maxSizeFS/BYTES_PER_MB);
MessageBoxW (hwndDlg, L"!\n",lpszTitle, MB_OK | MB_ICONEXCLAMATION );
continue;
}
}
if ( newVolumeSize > TC_MAX_VOLUME_SIZE )
{
// note: current limit TC_MAX_VOLUME_SIZE is 1 PetaByte
swprintf(szTmp,L"Maximum VeraCrypt volume size of %I64u TB exceeded!\n",TC_MAX_VOLUME_SIZE/BYTES_PER_TB);
MessageBoxW (hwndDlg, szTmp,lpszTitle, MB_OK | MB_ICONEXCLAMATION );
if (bIsDevice)
break; // TODO: ask to limit volume size to TC_MAX_VOLUME_SIZE
continue;
}
break;
}
VolExpandParam.oldSize = volSize;
// start progress dialog
DialogBoxParamW (hInst, MAKEINTRESOURCEW (IDD_EXPAND_PROGRESS_DLG), hwndDlg,
(DLGPROC) ExpandVolProgressDlgProc, (LPARAM) &VolExpandParam );
ret:
nStatus = ERR_SUCCESS;
error:
if (nStatus != 0)
handleError (hwndDlg, nStatus);
burn (&VolumePassword, sizeof (VolumePassword));
RestoreDefaultKeyFilesParam();
RandStop (FALSE);
NormalCursor();
return;
}
