diff options
Diffstat (limited to 'src/Driver/Ntvol.c')
| -rw-r--r-- | src/Driver/Ntvol.c | 862 |
1 files changed, 862 insertions, 0 deletions
diff --git a/src/Driver/Ntvol.c b/src/Driver/Ntvol.c new file mode 100644 index 00000000..caaf9428 --- /dev/null +++ b/src/Driver/Ntvol.c @@ -0,0 +1,862 @@ +/*
+ 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) 2003-2010 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 <wchar.h>
+#include "Crypto.h"
+#include "Volumes.h"
+
+#include "Apidrvr.h"
+#include "DriveFilter.h"
+#include "Ntdriver.h"
+#include "Ntvol.h"
+#include "VolumeFilter.h"
+
+#include "Boot/Windows/BootCommon.h"
+
+#include "Cache.h"
+
+#if 0 && _DEBUG
+#define EXTRA_INFO 1
+#endif
+
+#pragma warning( disable : 4127 )
+
+volatile BOOL ProbingHostDeviceForWrite = FALSE;
+
+
+NTSTATUS TCOpenVolume (PDEVICE_OBJECT DeviceObject,
+ PEXTENSION Extension,
+ MOUNT_STRUCT *mount,
+ PWSTR pwszMountVolume,
+ BOOL bRawDevice)
+{
+ FILE_STANDARD_INFORMATION FileStandardInfo;
+ FILE_BASIC_INFORMATION FileBasicInfo;
+ OBJECT_ATTRIBUTES oaFileAttributes;
+ UNICODE_STRING FullFileName;
+ IO_STATUS_BLOCK IoStatusBlock;
+ PCRYPTO_INFO cryptoInfoPtr = NULL;
+ PCRYPTO_INFO tmpCryptoInfo = NULL;
+ LARGE_INTEGER lDiskLength;
+ __int64 partitionStartingOffset = 0;
+ int volumeType;
+ char *readBuffer = 0;
+ NTSTATUS ntStatus = 0;
+ BOOL forceAccessCheck = (!bRawDevice && !(OsMajorVersion == 5 &&OsMinorVersion == 0)); // Windows 2000 does not support OBJ_FORCE_ACCESS_CHECK attribute
+ BOOL disableBuffering = TRUE;
+ BOOL exclusiveAccess = mount->bExclusiveAccess;
+
+ Extension->pfoDeviceFile = NULL;
+ Extension->hDeviceFile = NULL;
+ Extension->bTimeStampValid = FALSE;
+
+ RtlInitUnicodeString (&FullFileName, pwszMountVolume);
+ InitializeObjectAttributes (&oaFileAttributes, &FullFileName, OBJ_CASE_INSENSITIVE | (forceAccessCheck ? OBJ_FORCE_ACCESS_CHECK : 0) | OBJ_KERNEL_HANDLE, NULL, NULL);
+ KeInitializeEvent (&Extension->keVolumeEvent, NotificationEvent, FALSE);
+
+ if (Extension->SecurityClientContextValid)
+ {
+ ntStatus = SeImpersonateClientEx (&Extension->SecurityClientContext, NULL);
+ if (!NT_SUCCESS (ntStatus))
+ goto error;
+ }
+
+ mount->VolumeMountedReadOnlyAfterDeviceWriteProtected = FALSE;
+
+ // If we are opening a device, query its size first
+ if (bRawDevice)
+ {
+ PARTITION_INFORMATION pi;
+ PARTITION_INFORMATION_EX pix;
+ LARGE_INTEGER diskLengthInfo;
+ DISK_GEOMETRY dg;
+
+ ntStatus = IoGetDeviceObjectPointer (&FullFileName,
+ FILE_READ_DATA | FILE_READ_ATTRIBUTES,
+ &Extension->pfoDeviceFile,
+ &Extension->pFsdDevice);
+
+ if (!NT_SUCCESS (ntStatus))
+ goto error;
+
+ ntStatus = TCSendHostDeviceIoControlRequest (DeviceObject, Extension, IOCTL_DISK_GET_DRIVE_GEOMETRY, (char *) &dg, sizeof (dg));
+ if (!NT_SUCCESS (ntStatus))
+ goto error;
+
+ lDiskLength.QuadPart = dg.Cylinders.QuadPart * dg.SectorsPerTrack * dg.TracksPerCylinder * dg.BytesPerSector;
+ Extension->HostBytesPerSector = dg.BytesPerSector;
+
+ // Drive geometry is used only when IOCTL_DISK_GET_PARTITION_INFO fails
+ if (NT_SUCCESS (TCSendHostDeviceIoControlRequest (DeviceObject, Extension, IOCTL_DISK_GET_PARTITION_INFO_EX, (char *) &pix, sizeof (pix))))
+ {
+ lDiskLength.QuadPart = pix.PartitionLength.QuadPart;
+ partitionStartingOffset = pix.StartingOffset.QuadPart;
+ }
+ // Windows 2000 does not support IOCTL_DISK_GET_PARTITION_INFO_EX
+ else if (NT_SUCCESS (TCSendHostDeviceIoControlRequest (DeviceObject, Extension, IOCTL_DISK_GET_PARTITION_INFO, (char *) &pi, sizeof (pi))))
+ {
+ lDiskLength.QuadPart = pi.PartitionLength.QuadPart;
+ partitionStartingOffset = pi.StartingOffset.QuadPart;
+ }
+ else if (NT_SUCCESS (TCSendHostDeviceIoControlRequest (DeviceObject, Extension, IOCTL_DISK_GET_LENGTH_INFO, &diskLengthInfo, sizeof (diskLengthInfo))))
+ {
+ lDiskLength = diskLengthInfo;
+ }
+
+ ProbingHostDeviceForWrite = TRUE;
+
+ if (!mount->bMountReadOnly
+ && TCSendHostDeviceIoControlRequest (DeviceObject, Extension,
+ IsHiddenSystemRunning() ? TC_IOCTL_DISK_IS_WRITABLE : IOCTL_DISK_IS_WRITABLE, NULL, 0) == STATUS_MEDIA_WRITE_PROTECTED)
+ {
+ mount->bMountReadOnly = TRUE;
+ DeviceObject->Characteristics |= FILE_READ_ONLY_DEVICE;
+ mount->VolumeMountedReadOnlyAfterDeviceWriteProtected = TRUE;
+ }
+
+ ProbingHostDeviceForWrite = FALSE;
+
+ // Some Windows tools (e.g. diskmgmt, diskpart, vssadmin) fail or experience timeouts when there is a raw device
+ // open for exclusive access. Therefore, exclusive access is used only for file-hosted volumes.
+ // Applications requiring a consistent device image need to acquire exclusive write access first. This is prevented
+ // when a device-hosted volume is mounted.
+
+ exclusiveAccess = FALSE;
+ }
+ else
+ {
+ // Limit the maximum required buffer size
+ if (mount->BytesPerSector > 128 * BYTES_PER_KB)
+ {
+ ntStatus = STATUS_INVALID_PARAMETER;
+ goto error;
+ }
+
+ Extension->HostBytesPerSector = mount->BytesPerSector;
+
+ if (Extension->HostBytesPerSector != TC_SECTOR_SIZE_FILE_HOSTED_VOLUME)
+ disableBuffering = FALSE;
+ }
+
+ // Open the volume hosting file/device
+ if (!mount->bMountReadOnly)
+ {
+ ntStatus = ZwCreateFile (&Extension->hDeviceFile,
+ GENERIC_READ | GENERIC_WRITE | SYNCHRONIZE,
+ &oaFileAttributes,
+ &IoStatusBlock,
+ NULL,
+ FILE_ATTRIBUTE_NORMAL |
+ FILE_ATTRIBUTE_SYSTEM,
+ exclusiveAccess ? 0 : FILE_SHARE_READ | FILE_SHARE_WRITE,
+ FILE_OPEN,
+ FILE_RANDOM_ACCESS |
+ FILE_WRITE_THROUGH |
+ (disableBuffering ? FILE_NO_INTERMEDIATE_BUFFERING : 0) |
+ FILE_SYNCHRONOUS_IO_NONALERT,
+ NULL,
+ 0);
+ }
+
+ /* 26-4-99 NT for some partitions returns this code, it is really a access denied */
+ if (ntStatus == 0xc000001b)
+ ntStatus = STATUS_ACCESS_DENIED;
+
+ mount->VolumeMountedReadOnlyAfterAccessDenied = FALSE;
+
+ if (mount->bMountReadOnly || ntStatus == STATUS_ACCESS_DENIED)
+ {
+ ntStatus = ZwCreateFile (&Extension->hDeviceFile,
+ GENERIC_READ | SYNCHRONIZE,
+ &oaFileAttributes,
+ &IoStatusBlock,
+ NULL,
+ FILE_ATTRIBUTE_NORMAL |
+ FILE_ATTRIBUTE_SYSTEM,
+ exclusiveAccess ? FILE_SHARE_READ : FILE_SHARE_READ | FILE_SHARE_WRITE,
+ FILE_OPEN,
+ FILE_RANDOM_ACCESS |
+ FILE_WRITE_THROUGH |
+ (disableBuffering ? FILE_NO_INTERMEDIATE_BUFFERING : 0) |
+ FILE_SYNCHRONOUS_IO_NONALERT,
+ NULL,
+ 0);
+
+ if (NT_SUCCESS (ntStatus) && !mount->bMountReadOnly)
+ mount->VolumeMountedReadOnlyAfterAccessDenied = TRUE;
+
+ Extension->bReadOnly = TRUE;
+ DeviceObject->Characteristics |= FILE_READ_ONLY_DEVICE;
+ }
+ else
+ Extension->bReadOnly = FALSE;
+
+ /* 26-4-99 NT for some partitions returns this code, it is really a
+ access denied */
+ if (ntStatus == 0xc000001b)
+ {
+ /* Partitions which return this code can still be opened with
+ FILE_SHARE_READ but this causes NT problems elsewhere in
+ particular if you do FILE_SHARE_READ NT will die later if
+ anyone even tries to open the partition (or file for that
+ matter...) */
+ ntStatus = STATUS_SHARING_VIOLATION;
+ }
+
+ if (!NT_SUCCESS (ntStatus))
+ {
+ goto error;
+ }
+
+ // If we have opened a file, query its size now
+ if (bRawDevice == FALSE)
+ {
+ ntStatus = ZwQueryInformationFile (Extension->hDeviceFile,
+ &IoStatusBlock,
+ &FileBasicInfo,
+ sizeof (FileBasicInfo),
+ FileBasicInformation);
+
+ if (NT_SUCCESS (ntStatus))
+ {
+ if (mount->bPreserveTimestamp)
+ {
+ Extension->fileCreationTime = FileBasicInfo.CreationTime;
+ Extension->fileLastAccessTime = FileBasicInfo.LastAccessTime;
+ Extension->fileLastWriteTime = FileBasicInfo.LastWriteTime;
+ Extension->fileLastChangeTime = FileBasicInfo.ChangeTime;
+ Extension->bTimeStampValid = TRUE;
+ }
+
+ ntStatus = ZwQueryInformationFile (Extension->hDeviceFile,
+ &IoStatusBlock,
+ &FileStandardInfo,
+ sizeof (FileStandardInfo),
+ FileStandardInformation);
+ }
+
+ if (!NT_SUCCESS (ntStatus))
+ {
+ Dump ("ZwQueryInformationFile failed while opening file: NTSTATUS 0x%08x\n",
+ ntStatus);
+ goto error;
+ }
+
+ lDiskLength.QuadPart = FileStandardInfo.EndOfFile.QuadPart;
+
+ if (FileBasicInfo.FileAttributes & FILE_ATTRIBUTE_COMPRESSED)
+ {
+ Dump ("File \"%ls\" is marked as compressed - not supported!\n", pwszMountVolume);
+ mount->nReturnCode = ERR_COMPRESSION_NOT_SUPPORTED;
+ ntStatus = STATUS_SUCCESS;
+ goto error;
+ }
+
+ ntStatus = ObReferenceObjectByHandle (Extension->hDeviceFile,
+ FILE_ALL_ACCESS,
+ *IoFileObjectType,
+ KernelMode,
+ &Extension->pfoDeviceFile,
+ 0);
+
+ if (!NT_SUCCESS (ntStatus))
+ {
+ goto error;
+ }
+
+ /* Get the FSD device for the file (probably either NTFS or FAT) */
+ Extension->pFsdDevice = IoGetRelatedDeviceObject (Extension->pfoDeviceFile);
+ }
+ else
+ {
+ // Try to gain "raw" access to the partition in case there is a live filesystem on it (otherwise,
+ // the NTFS driver guards hidden sectors and prevents mounting using a backup header e.g. after the user
+ // accidentally quick-formats a dismounted partition-hosted TrueCrypt volume as NTFS).
+
+ PFILE_OBJECT pfoTmpDeviceFile = NULL;
+
+ if (NT_SUCCESS (ObReferenceObjectByHandle (Extension->hDeviceFile, FILE_ALL_ACCESS, *IoFileObjectType, KernelMode, &pfoTmpDeviceFile, NULL))
+ && pfoTmpDeviceFile != NULL)
+ {
+ TCFsctlCall (pfoTmpDeviceFile, FSCTL_ALLOW_EXTENDED_DASD_IO, NULL, 0, NULL, 0);
+ ObDereferenceObject (pfoTmpDeviceFile);
+ }
+ }
+
+ // Check volume size
+ if (lDiskLength.QuadPart < TC_MIN_VOLUME_SIZE_LEGACY || lDiskLength.QuadPart > TC_MAX_VOLUME_SIZE)
+ {
+ mount->nReturnCode = ERR_VOL_SIZE_WRONG;
+ ntStatus = STATUS_SUCCESS;
+ goto error;
+ }
+
+ Extension->DiskLength = lDiskLength.QuadPart;
+ Extension->HostLength = lDiskLength.QuadPart;
+
+ readBuffer = TCalloc (max (max (TC_VOLUME_HEADER_EFFECTIVE_SIZE, PAGE_SIZE), Extension->HostBytesPerSector));
+ if (readBuffer == NULL)
+ {
+ ntStatus = STATUS_INSUFFICIENT_RESOURCES;
+ goto error;
+ }
+
+ // Go through all volume types (e.g., normal, hidden)
+ for (volumeType = TC_VOLUME_TYPE_NORMAL;
+ volumeType < TC_VOLUME_TYPE_COUNT;
+ volumeType++)
+ {
+ Dump ("Trying to open volume type %d\n", volumeType);
+
+ if (mount->bPartitionInInactiveSysEncScope
+ && volumeType == TC_VOLUME_TYPE_HIDDEN_LEGACY)
+ continue;
+
+ /* Read the volume header */
+
+ if (!mount->bPartitionInInactiveSysEncScope
+ || (mount->bPartitionInInactiveSysEncScope && volumeType == TC_VOLUME_TYPE_HIDDEN))
+ {
+ // Header of a volume that is not within the scope of system encryption, or
+ // header of a system hidden volume (containing a hidden OS)
+
+ LARGE_INTEGER headerOffset;
+
+ if (mount->UseBackupHeader && lDiskLength.QuadPart <= TC_TOTAL_VOLUME_HEADERS_SIZE)
+ continue;
+
+ switch (volumeType)
+ {
+ case TC_VOLUME_TYPE_NORMAL:
+ headerOffset.QuadPart = mount->UseBackupHeader ? lDiskLength.QuadPart - TC_VOLUME_HEADER_GROUP_SIZE : TC_VOLUME_HEADER_OFFSET;
+ break;
+
+ case TC_VOLUME_TYPE_HIDDEN:
+ if (lDiskLength.QuadPart <= TC_VOLUME_HEADER_GROUP_SIZE)
+ continue;
+
+ headerOffset.QuadPart = mount->UseBackupHeader ? lDiskLength.QuadPart - TC_HIDDEN_VOLUME_HEADER_OFFSET : TC_HIDDEN_VOLUME_HEADER_OFFSET;
+ break;
+
+ case TC_VOLUME_TYPE_HIDDEN_LEGACY:
+ if (mount->UseBackupHeader)
+ continue;
+
+ if (bRawDevice && Extension->HostBytesPerSector != TC_SECTOR_SIZE_LEGACY)
+ continue;
+
+ headerOffset.QuadPart = lDiskLength.QuadPart - TC_HIDDEN_VOLUME_HEADER_OFFSET_LEGACY;
+ break;
+ }
+
+ Dump ("Reading volume header at %I64d\n", headerOffset.QuadPart);
+
+ ntStatus = ZwReadFile (Extension->hDeviceFile,
+ NULL,
+ NULL,
+ NULL,
+ &IoStatusBlock,
+ readBuffer,
+ bRawDevice ? max (TC_VOLUME_HEADER_EFFECTIVE_SIZE, Extension->HostBytesPerSector) : TC_VOLUME_HEADER_EFFECTIVE_SIZE,
+ &headerOffset,
+ NULL);
+ }
+ else
+ {
+ // Header of a partition that is within the scope of system encryption
+
+ WCHAR parentDrivePath [47+1] = {0};
+ HANDLE hParentDeviceFile = NULL;
+ UNICODE_STRING FullParentPath;
+ OBJECT_ATTRIBUTES oaParentFileAttributes;
+ LARGE_INTEGER parentKeyDataOffset;
+
+ _snwprintf (parentDrivePath,
+ sizeof (parentDrivePath) / sizeof (WCHAR) - 1,
+ WIDE ("\\Device\\Harddisk%d\\Partition0"),
+ mount->nPartitionInInactiveSysEncScopeDriveNo);
+
+ Dump ("Mounting partition within scope of system encryption (reading key data from: %ls)\n", parentDrivePath);
+
+ RtlInitUnicodeString (&FullParentPath, parentDrivePath);
+ InitializeObjectAttributes (&oaParentFileAttributes, &FullParentPath, OBJ_CASE_INSENSITIVE | OBJ_KERNEL_HANDLE, NULL, NULL);
+
+ ntStatus = ZwCreateFile (&hParentDeviceFile,
+ GENERIC_READ | SYNCHRONIZE,
+ &oaParentFileAttributes,
+ &IoStatusBlock,
+ NULL,
+ FILE_ATTRIBUTE_NORMAL |
+ FILE_ATTRIBUTE_SYSTEM,
+ FILE_SHARE_READ | FILE_SHARE_WRITE,
+ FILE_OPEN,
+ FILE_RANDOM_ACCESS |
+ FILE_WRITE_THROUGH |
+ FILE_NO_INTERMEDIATE_BUFFERING |
+ FILE_SYNCHRONOUS_IO_NONALERT,
+ NULL,
+ 0);
+
+ if (!NT_SUCCESS (ntStatus))
+ {
+ if (hParentDeviceFile != NULL)
+ ZwClose (hParentDeviceFile);
+
+ Dump ("Cannot open %ls\n", parentDrivePath);
+
+ goto error;
+ }
+
+ parentKeyDataOffset.QuadPart = TC_BOOT_VOLUME_HEADER_SECTOR_OFFSET;
+
+ ntStatus = ZwReadFile (hParentDeviceFile,
+ NULL,
+ NULL,
+ NULL,
+ &IoStatusBlock,
+ readBuffer,
+ max (TC_VOLUME_HEADER_EFFECTIVE_SIZE, Extension->HostBytesPerSector),
+ &parentKeyDataOffset,
+ NULL);
+
+ if (hParentDeviceFile != NULL)
+ ZwClose (hParentDeviceFile);
+ }
+
+ if (!NT_SUCCESS (ntStatus) && ntStatus != STATUS_END_OF_FILE)
+ {
+ Dump ("Read failed: NTSTATUS 0x%08x\n", ntStatus);
+ goto error;
+ }
+
+ if (ntStatus == STATUS_END_OF_FILE || IoStatusBlock.Information < TC_VOLUME_HEADER_EFFECTIVE_SIZE)
+ {
+ Dump ("Read didn't read enough data\n");
+
+ // If FSCTL_ALLOW_EXTENDED_DASD_IO failed and there is a live filesystem on the partition, then the
+ // filesystem driver may report EOF when we are reading hidden sectors (when the filesystem is
+ // shorter than the partition). This can happen for example after the user quick-formats a dismounted
+ // partition-hosted TrueCrypt volume and then tries to mount the volume using the embedded backup header.
+ memset (readBuffer, 0, TC_VOLUME_HEADER_EFFECTIVE_SIZE);
+ }
+
+ /* Attempt to recognize the volume (decrypt the header) */
+
+ ReadVolumeHeaderRecoveryMode = mount->RecoveryMode;
+
+ if ((volumeType == TC_VOLUME_TYPE_HIDDEN || volumeType == TC_VOLUME_TYPE_HIDDEN_LEGACY) && mount->bProtectHiddenVolume)
+ {
+ mount->nReturnCode = ReadVolumeHeaderWCache (
+ FALSE,
+ mount->bCache,
+ readBuffer,
+ &mount->ProtectedHidVolPassword,
+ &tmpCryptoInfo);
+ }
+ else
+ {
+ mount->nReturnCode = ReadVolumeHeaderWCache (
+ mount->bPartitionInInactiveSysEncScope && volumeType == TC_VOLUME_TYPE_NORMAL,
+ mount->bCache,
+ readBuffer,
+ &mount->VolumePassword,
+ &Extension->cryptoInfo);
+ }
+
+ ReadVolumeHeaderRecoveryMode = FALSE;
+
+ if (mount->nReturnCode == 0 || mount->nReturnCode == ERR_CIPHER_INIT_WEAK_KEY)
+ {
+ /* Volume header successfully decrypted */
+
+ Dump ("Volume header decrypted\n");
+ Dump ("Required program version = %x\n", (int) Extension->cryptoInfo->RequiredProgramVersion);
+ Dump ("Legacy volume = %d\n", (int) Extension->cryptoInfo->LegacyVolume);
+
+ if (IsHiddenSystemRunning() && !Extension->cryptoInfo->hiddenVolume)
+ {
+ Extension->bReadOnly = mount->bMountReadOnly = TRUE;
+ HiddenSysLeakProtectionCount++;
+ }
+
+ Extension->cryptoInfo->bProtectHiddenVolume = FALSE;
+ Extension->cryptoInfo->bHiddenVolProtectionAction = FALSE;
+
+ Extension->cryptoInfo->bPartitionInInactiveSysEncScope = mount->bPartitionInInactiveSysEncScope;
+
+ if (volumeType == TC_VOLUME_TYPE_NORMAL)
+ {
+ if (mount->bPartitionInInactiveSysEncScope)
+ {
+ if (Extension->cryptoInfo->EncryptedAreaStart.Value > (unsigned __int64) partitionStartingOffset
+ || Extension->cryptoInfo->EncryptedAreaStart.Value + Extension->cryptoInfo->VolumeSize.Value <= (unsigned __int64) partitionStartingOffset)
+ {
+ // The partition is not within the key scope of system encryption
+ mount->nReturnCode = ERR_PASSWORD_WRONG;
+ ntStatus = STATUS_SUCCESS;
+ goto error;
+ }
+
+ if (Extension->cryptoInfo->EncryptedAreaLength.Value != Extension->cryptoInfo->VolumeSize.Value)
+ {
+ // Partial encryption is not supported for volumes mounted as regular
+ mount->nReturnCode = ERR_ENCRYPTION_NOT_COMPLETED;
+ ntStatus = STATUS_SUCCESS;
+ goto error;
+ }
+ }
+ else if (Extension->cryptoInfo->HeaderFlags & TC_HEADER_FLAG_NONSYS_INPLACE_ENC)
+ {
+ if (Extension->cryptoInfo->EncryptedAreaLength.Value != Extension->cryptoInfo->VolumeSize.Value)
+ {
+ // Non-system in-place encryption process has not been completed on this volume
+ mount->nReturnCode = ERR_NONSYS_INPLACE_ENC_INCOMPLETE;
+ ntStatus = STATUS_SUCCESS;
+ goto error;
+ }
+ }
+ }
+
+ Extension->cryptoInfo->FirstDataUnitNo.Value = 0;
+
+ if (Extension->cryptoInfo->hiddenVolume && IsHiddenSystemRunning())
+ {
+ // Prevent mount of a hidden system partition if the system hosted on it is currently running
+ if (memcmp (Extension->cryptoInfo->master_keydata, GetSystemDriveCryptoInfo()->master_keydata, EAGetKeySize (Extension->cryptoInfo->ea)) == 0)
+ {
+ mount->nReturnCode = ERR_VOL_ALREADY_MOUNTED;
+ ntStatus = STATUS_SUCCESS;
+ goto error;
+ }
+ }
+
+ switch (volumeType)
+ {
+ case TC_VOLUME_TYPE_NORMAL:
+
+ Extension->cryptoInfo->hiddenVolume = FALSE;
+
+ if (mount->bPartitionInInactiveSysEncScope)
+ {
+ Extension->cryptoInfo->volDataAreaOffset = 0;
+ Extension->DiskLength = lDiskLength.QuadPart;
+ Extension->cryptoInfo->FirstDataUnitNo.Value = partitionStartingOffset / ENCRYPTION_DATA_UNIT_SIZE;
+ }
+ else if (Extension->cryptoInfo->LegacyVolume)
+ {
+ Extension->cryptoInfo->volDataAreaOffset = TC_VOLUME_HEADER_SIZE_LEGACY;
+ Extension->DiskLength = lDiskLength.QuadPart - TC_VOLUME_HEADER_SIZE_LEGACY;
+ }
+ else
+ {
+ Extension->cryptoInfo->volDataAreaOffset = Extension->cryptoInfo->EncryptedAreaStart.Value;
+ Extension->DiskLength = Extension->cryptoInfo->VolumeSize.Value;
+ }
+
+ break;
+
+ case TC_VOLUME_TYPE_HIDDEN:
+ case TC_VOLUME_TYPE_HIDDEN_LEGACY:
+
+ cryptoInfoPtr = mount->bProtectHiddenVolume ? tmpCryptoInfo : Extension->cryptoInfo;
+
+ if (volumeType == TC_VOLUME_TYPE_HIDDEN_LEGACY)
+ Extension->cryptoInfo->hiddenVolumeOffset = lDiskLength.QuadPart - cryptoInfoPtr->hiddenVolumeSize - TC_HIDDEN_VOLUME_HEADER_OFFSET_LEGACY;
+ else
+ Extension->cryptoInfo->hiddenVolumeOffset = cryptoInfoPtr->EncryptedAreaStart.Value;
+
+ Dump ("Hidden volume offset = %I64d\n", Extension->cryptoInfo->hiddenVolumeOffset);
+ Dump ("Hidden volume size = %I64d\n", cryptoInfoPtr->hiddenVolumeSize);
+ Dump ("Hidden volume end = %I64d\n", Extension->cryptoInfo->hiddenVolumeOffset + cryptoInfoPtr->hiddenVolumeSize - 1);
+
+ // Validate the offset
+ if (Extension->cryptoInfo->hiddenVolumeOffset % ENCRYPTION_DATA_UNIT_SIZE != 0)
+ {
+ mount->nReturnCode = ERR_VOL_SIZE_WRONG;
+ ntStatus = STATUS_SUCCESS;
+ goto error;
+ }
+
+ // If we are supposed to actually mount the hidden volume (not just to protect it)
+ if (!mount->bProtectHiddenVolume)
+ {
+ Extension->DiskLength = cryptoInfoPtr->hiddenVolumeSize;
+ Extension->cryptoInfo->hiddenVolume = TRUE;
+ Extension->cryptoInfo->volDataAreaOffset = Extension->cryptoInfo->hiddenVolumeOffset;
+ }
+ else
+ {
+ // Hidden volume protection
+ Extension->cryptoInfo->hiddenVolume = FALSE;
+ Extension->cryptoInfo->bProtectHiddenVolume = TRUE;
+
+ Extension->cryptoInfo->hiddenVolumeProtectedSize = tmpCryptoInfo->hiddenVolumeSize;
+
+ if (volumeType == TC_VOLUME_TYPE_HIDDEN_LEGACY)
+ Extension->cryptoInfo->hiddenVolumeProtectedSize += TC_VOLUME_HEADER_SIZE_LEGACY;
+
+ Dump ("Hidden volume protection active: %I64d-%I64d (%I64d)\n", Extension->cryptoInfo->hiddenVolumeOffset, Extension->cryptoInfo->hiddenVolumeProtectedSize + Extension->cryptoInfo->hiddenVolumeOffset - 1, Extension->cryptoInfo->hiddenVolumeProtectedSize);
+ }
+
+ break;
+ }
+
+ Dump ("Volume data offset = %I64d\n", Extension->cryptoInfo->volDataAreaOffset);
+ Dump ("Volume data size = %I64d\n", Extension->DiskLength);
+ Dump ("Volume data end = %I64d\n", Extension->cryptoInfo->volDataAreaOffset + Extension->DiskLength - 1);
+
+ if (Extension->DiskLength == 0)
+ {
+ Dump ("Incorrect volume size\n");
+ continue;
+ }
+
+ // If this is a hidden volume, make sure we are supposed to actually
+ // mount it (i.e. not just to protect it)
+ if (volumeType == TC_VOLUME_TYPE_NORMAL || !mount->bProtectHiddenVolume)
+ {
+ // Validate sector size
+ if (bRawDevice && Extension->cryptoInfo->SectorSize != Extension->HostBytesPerSector)
+ {
+ mount->nReturnCode = ERR_PARAMETER_INCORRECT;
+ ntStatus = STATUS_SUCCESS;
+ goto error;
+ }
+
+ // Calculate virtual volume geometry
+ Extension->TracksPerCylinder = 1;
+ Extension->SectorsPerTrack = 1;
+ Extension->BytesPerSector = Extension->cryptoInfo->SectorSize;
+ Extension->NumberOfCylinders = Extension->DiskLength / Extension->BytesPerSector;
+ Extension->PartitionType = 0;
+
+ Extension->bRawDevice = bRawDevice;
+
+ memset (Extension->wszVolume, 0, sizeof (Extension->wszVolume));
+ if (wcsstr (pwszMountVolume, WIDE ("\\??\\UNC\\")) == pwszMountVolume)
+ {
+ /* UNC path */
+ _snwprintf (Extension->wszVolume,
+ sizeof (Extension->wszVolume) / sizeof (WCHAR) - 1,
+ WIDE ("\\??\\\\%s"),
+ pwszMountVolume + 7);
+ }
+ else
+ {
+ wcsncpy (Extension->wszVolume, pwszMountVolume, sizeof (Extension->wszVolume) / sizeof (WCHAR) - 1);
+ }
+ }
+
+ // If we are to protect a hidden volume we cannot exit yet, for we must also
+ // decrypt the hidden volume header.
+ if (!(volumeType == TC_VOLUME_TYPE_NORMAL && mount->bProtectHiddenVolume))
+ {
+ TCfree (readBuffer);
+
+ if (tmpCryptoInfo != NULL)
+ {
+ crypto_close (tmpCryptoInfo);
+ tmpCryptoInfo = NULL;
+ }
+
+ return STATUS_SUCCESS;
+ }
+ }
+ else if ((mount->bProtectHiddenVolume && volumeType == TC_VOLUME_TYPE_NORMAL)
+ || mount->nReturnCode != ERR_PASSWORD_WRONG)
+ {
+ /* If we are not supposed to protect a hidden volume, the only error that is
+ tolerated is ERR_PASSWORD_WRONG (to allow mounting a possible hidden volume).
+
+ If we _are_ supposed to protect a hidden volume, we do not tolerate any error
+ (both volume headers must be successfully decrypted). */
+
+ break;
+ }
+ }
+
+ /* Failed due to some non-OS reason so we drop through and return NT
+ SUCCESS then nReturnCode is checked later in user-mode */
+
+ if (mount->nReturnCode == ERR_OUTOFMEMORY)
+ ntStatus = STATUS_INSUFFICIENT_RESOURCES;
+ else
+ ntStatus = STATUS_SUCCESS;
+
+error:
+ if (mount->nReturnCode == ERR_SUCCESS)
+ mount->nReturnCode = ERR_PASSWORD_WRONG;
+
+ if (tmpCryptoInfo != NULL)
+ {
+ crypto_close (tmpCryptoInfo);
+ tmpCryptoInfo = NULL;
+ }
+
+ if (Extension->cryptoInfo)
+ {
+ crypto_close (Extension->cryptoInfo);
+ Extension->cryptoInfo = NULL;
+ }
+
+ if (Extension->bTimeStampValid)
+ {
+ RestoreTimeStamp (Extension);
+ }
+
+ /* Close the hDeviceFile */
+ if (Extension->hDeviceFile != NULL)
+ ZwClose (Extension->hDeviceFile);
+
+ /* The cryptoInfo pointer is deallocated if the readheader routines
+ fail so there is no need to deallocate here */
+
+ /* Dereference the user-mode file object */
+ if (Extension->pfoDeviceFile != NULL)
+ ObDereferenceObject (Extension->pfoDeviceFile);
+
+ /* Free the tmp IO buffers */
+ if (readBuffer != NULL)
+ TCfree (readBuffer);
+
+ return ntStatus;
+}
+
+void TCCloseVolume (PDEVICE_OBJECT DeviceObject, PEXTENSION Extension)
+{
+ if (DeviceObject); /* Remove compiler warning */
+
+ if (Extension->hDeviceFile != NULL)
+ {
+ if (Extension->bRawDevice == FALSE
+ && Extension->bTimeStampValid)
+ {
+ RestoreTimeStamp (Extension);
+ }
+ ZwClose (Extension->hDeviceFile);
+ }
+ ObDereferenceObject (Extension->pfoDeviceFile);
+ crypto_close (Extension->cryptoInfo);
+}
+
+
+NTSTATUS TCSendHostDeviceIoControlRequest (PDEVICE_OBJECT DeviceObject,
+ PEXTENSION Extension,
+ ULONG IoControlCode,
+ void *OutputBuffer,
+ ULONG OutputBufferSize)
+{
+ IO_STATUS_BLOCK IoStatusBlock;
+ NTSTATUS ntStatus;
+ PIRP Irp;
+
+ if (DeviceObject); /* Remove compiler warning */
+
+ KeClearEvent (&Extension->keVolumeEvent);
+
+ Irp = IoBuildDeviceIoControlRequest (IoControlCode,
+ Extension->pFsdDevice,
+ NULL, 0,
+ OutputBuffer, OutputBufferSize,
+ FALSE,
+ &Extension->keVolumeEvent,
+ &IoStatusBlock);
+
+ if (Irp == NULL)
+ {
+ Dump ("IRP allocation failed\n");
+ return STATUS_INSUFFICIENT_RESOURCES;
+ }
+
+ // Disk device may be used by filesystem driver which needs file object
+ IoGetNextIrpStackLocation (Irp) -> FileObject = Extension->pfoDeviceFile;
+
+ ntStatus = IoCallDriver (Extension->pFsdDevice, Irp);
+ if (ntStatus == STATUS_PENDING)
+ {
+ KeWaitForSingleObject (&Extension->keVolumeEvent, Executive, KernelMode, FALSE, NULL);
+ ntStatus = IoStatusBlock.Status;
+ }
+
+ return ntStatus;
+}
+
+NTSTATUS COMPLETE_IRP (PDEVICE_OBJECT DeviceObject,
+ PIRP Irp,
+ NTSTATUS IrpStatus,
+ ULONG_PTR IrpInformation)
+{
+ Irp->IoStatus.Status = IrpStatus;
+ Irp->IoStatus.Information = IrpInformation;
+
+ if (DeviceObject); /* Remove compiler warning */
+
+#if EXTRA_INFO
+ if (!NT_SUCCESS (IrpStatus))
+ {
+ PIO_STACK_LOCATION irpSp = IoGetCurrentIrpStackLocation (Irp);
+ Dump ("COMPLETE_IRP FAILING IRP %ls Flags 0x%08x vpb 0x%08x NTSTATUS 0x%08x\n", TCTranslateCode (irpSp->MajorFunction),
+ (ULONG) DeviceObject->Flags, (ULONG) DeviceObject->Vpb->Flags, IrpStatus);
+ }
+ else
+ {
+ PIO_STACK_LOCATION irpSp = IoGetCurrentIrpStackLocation (Irp);
+ Dump ("COMPLETE_IRP SUCCESS IRP %ls Flags 0x%08x vpb 0x%08x NTSTATUS 0x%08x\n", TCTranslateCode (irpSp->MajorFunction),
+ (ULONG) DeviceObject->Flags, (ULONG) DeviceObject->Vpb->Flags, IrpStatus);
+ }
+#endif
+ IoCompleteRequest (Irp, IO_NO_INCREMENT);
+ return IrpStatus;
+}
+
+
+static void RestoreTimeStamp (PEXTENSION Extension)
+{
+ NTSTATUS ntStatus;
+ FILE_BASIC_INFORMATION FileBasicInfo;
+ IO_STATUS_BLOCK IoStatusBlock;
+
+ if (Extension->hDeviceFile != NULL
+ && Extension->bRawDevice == FALSE
+ && Extension->bReadOnly == FALSE
+ && Extension->bTimeStampValid)
+ {
+ ntStatus = ZwQueryInformationFile (Extension->hDeviceFile,
+ &IoStatusBlock,
+ &FileBasicInfo,
+ sizeof (FileBasicInfo),
+ FileBasicInformation);
+
+ if (!NT_SUCCESS (ntStatus))
+ {
+ Dump ("ZwQueryInformationFile failed in RestoreTimeStamp: NTSTATUS 0x%08x\n",
+ ntStatus);
+ }
+ else
+ {
+ FileBasicInfo.CreationTime = Extension->fileCreationTime;
+ FileBasicInfo.LastAccessTime = Extension->fileLastAccessTime;
+ FileBasicInfo.LastWriteTime = Extension->fileLastWriteTime;
+ FileBasicInfo.ChangeTime = Extension->fileLastChangeTime;
+
+ ntStatus = ZwSetInformationFile(
+ Extension->hDeviceFile,
+ &IoStatusBlock,
+ &FileBasicInfo,
+ sizeof (FileBasicInfo),
+ FileBasicInformation);
+
+ if (!NT_SUCCESS (ntStatus))
+ Dump ("ZwSetInformationFile failed in RestoreTimeStamp: NTSTATUS 0x%08x\n",ntStatus);
+ }
+ }
+}
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