/* 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 #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 ) #include 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; /* default value for storage alignment */ Extension->HostMaximumTransferLength = 65536; Extension->HostMaximumPhysicalPages = 17; Extension->HostAlignmentMask = 0; /* default values for non-SSD drives */ Extension->IncursSeekPenalty = TRUE; Extension->TrimEnabled = FALSE; Extension->DeviceNumber = (ULONG) -1; 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_EX dg; STORAGE_PROPERTY_QUERY storagePropertyQuery = {0}; byte* dgBuffer; STORAGE_DEVICE_NUMBER storageDeviceNumber; ntStatus = IoGetDeviceObjectPointer (&FullFileName, FILE_READ_DATA | FILE_READ_ATTRIBUTES, &Extension->pfoDeviceFile, &Extension->pFsdDevice); if (!NT_SUCCESS (ntStatus)) goto error; dgBuffer = TCalloc (256); if (!dgBuffer) { ntStatus = STATUS_INSUFFICIENT_RESOURCES; goto error; } ntStatus = TCSendHostDeviceIoControlRequest (DeviceObject, Extension, IOCTL_DISK_GET_DRIVE_GEOMETRY_EX, (char *) dgBuffer, 256); if (!NT_SUCCESS (ntStatus)) { DISK_GEOMETRY geo; ntStatus = TCSendHostDeviceIoControlRequest (DeviceObject, Extension, IOCTL_DISK_GET_DRIVE_GEOMETRY, (char *) &geo, sizeof (geo)); if (!NT_SUCCESS (ntStatus)) { TCfree (dgBuffer); goto error; } memset (&dg, 0, sizeof (dg)); memcpy (&dg.Geometry, &geo, sizeof (geo)); dg.DiskSize.QuadPart = geo.Cylinders.QuadPart * geo.SectorsPerTrack * geo.TracksPerCylinder * geo.BytesPerSector; if (OsMajorVersion >= 6) { STORAGE_READ_CAPACITY storage = {0}; NTSTATUS lStatus; storage.Version = sizeof (STORAGE_READ_CAPACITY); storage.Size = sizeof (STORAGE_READ_CAPACITY); lStatus = TCSendHostDeviceIoControlRequest (DeviceObject, Extension, IOCTL_STORAGE_READ_CAPACITY, (char*) &storage, sizeof (STORAGE_READ_CAPACITY)); if ( NT_SUCCESS(lStatus) && (storage.Size == sizeof (STORAGE_READ_CAPACITY)) ) { dg.DiskSize.QuadPart = storage.DiskLength.QuadPart; } } } else memcpy (&dg, dgBuffer, sizeof (DISK_GEOMETRY_EX)); TCfree (dgBuffer); if (NT_SUCCESS (TCSendHostDeviceIoControlRequest (DeviceObject, Extension, IOCTL_STORAGE_GET_DEVICE_NUMBER, (char*) &storageDeviceNumber, sizeof (storageDeviceNumber)))) { Extension->DeviceNumber = storageDeviceNumber.DeviceNumber; } lDiskLength.QuadPart = dg.DiskSize.QuadPart; Extension->HostBytesPerSector = dg.Geometry.BytesPerSector; Extension->HostBytesPerPhysicalSector = dg.Geometry.BytesPerSector; /* IOCTL_STORAGE_QUERY_PROPERTY supported only on Vista and above */ if (OsMajorVersion >= 6) { STORAGE_ACCESS_ALIGNMENT_DESCRIPTOR alignmentDesc = {0}; STORAGE_ADAPTER_DESCRIPTOR adapterDesc = {0}; DEVICE_SEEK_PENALTY_DESCRIPTOR penaltyDesc = {0}; DEVICE_TRIM_DESCRIPTOR trimDesc = {0}; storagePropertyQuery.PropertyId = StorageAccessAlignmentProperty; storagePropertyQuery.QueryType = PropertyStandardQuery; alignmentDesc.Version = sizeof (STORAGE_ACCESS_ALIGNMENT_DESCRIPTOR); alignmentDesc.Size = sizeof (STORAGE_ACCESS_ALIGNMENT_DESCRIPTOR); if (NT_SUCCESS (TCSendHostDeviceIoControlRequestEx (DeviceObject, Extension, IOCTL_STORAGE_QUERY_PROPERTY, (char*) &storagePropertyQuery, sizeof(storagePropertyQuery), (char *) &alignmentDesc, sizeof (alignmentDesc)))) { Extension->HostBytesPerPhysicalSector = alignmentDesc.BytesPerPhysicalSector; } storagePropertyQuery.PropertyId = StorageAdapterProperty; adapterDesc.Version = sizeof (STORAGE_ADAPTER_DESCRIPTOR); adapterDesc.Size = sizeof (STORAGE_ADAPTER_DESCRIPTOR); if (NT_SUCCESS (TCSendHostDeviceIoControlRequestEx (DeviceObject, Extension, IOCTL_STORAGE_QUERY_PROPERTY, (char*) &storagePropertyQuery, sizeof(storagePropertyQuery), (char *) &adapterDesc, sizeof (adapterDesc)))) { Extension->HostMaximumTransferLength = adapterDesc.MaximumTransferLength; Extension->HostMaximumPhysicalPages = adapterDesc.MaximumPhysicalPages; Extension->HostAlignmentMask = adapterDesc.AlignmentMask; } storagePropertyQuery.PropertyId = StorageDeviceSeekPenaltyProperty; penaltyDesc.Version = sizeof (DEVICE_SEEK_PENALTY_DESCRIPTOR); penaltyDesc.Size = sizeof (DEVICE_SEEK_PENALTY_DESCRIPTOR); if (NT_SUCCESS (TCSendHostDeviceIoControlRequestEx (DeviceObject, Extension, IOCTL_STORAGE_QUERY_PROPERTY, (char*) &storagePropertyQuery, sizeof(storagePropertyQuery), (char *) &penaltyDesc, sizeof (penaltyDesc)))) { Extension->IncursSeekPenalty = penaltyDesc.IncursSeekPenalty; } storagePropertyQuery.PropertyId = StorageDeviceTrimProperty; trimDesc.Version = sizeof (DEVICE_TRIM_DESCRIPTOR); trimDesc.Size = sizeof (DEVICE_TRIM_DESCRIPTOR); if (NT_SUCCESS (TCSendHostDeviceIoControlRequestEx (DeviceObject, Extension, IOCTL_STORAGE_QUERY_PROPERTY, (char*) &storagePropertyQuery, sizeof(storagePropertyQuery), (char *) &trimDesc, sizeof (trimDesc)))) { Extension->TrimEnabled = trimDesc.TrimEnabled; } } // 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; Extension->HostBytesPerPhysicalSector = mount->BytesPerPhysicalSector; Extension->HostMaximumTransferLength = mount->MaximumTransferLength; Extension->HostMaximumPhysicalPages = mount->MaximumPhysicalPages; Extension->HostAlignmentMask = mount->AlignmentMask; 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); /* 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; } 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; RtlStringCbPrintfW (parentDrivePath, sizeof (parentDrivePath), 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) && mount->bProtectHiddenVolume) { mount->nReturnCode = ReadVolumeHeaderWCache ( FALSE, mount->bCache, mount->bCachePim, readBuffer, &mount->ProtectedHidVolPassword, mount->ProtectedHidVolPkcs5Prf, mount->ProtectedHidVolPim, mount->bTrueCryptMode, &tmpCryptoInfo); } else { mount->nReturnCode = ReadVolumeHeaderWCache ( mount->bPartitionInInactiveSysEncScope && volumeType == TC_VOLUME_TYPE_NORMAL, mount->bCache, mount->bCachePim, readBuffer, &mount->VolumePassword, mount->pkcs5_prf, mount->VolumePim, mount->bTrueCryptMode, &Extension->cryptoInfo); } ReadVolumeHeaderRecoveryMode = FALSE; if (mount->nReturnCode == 0 || mount->nReturnCode == ERR_CIPHER_INIT_WEAK_KEY) { /* Volume header successfully decrypted */ if (!Extension->cryptoInfo) { /* should never happen */ mount->nReturnCode = ERR_OUTOFMEMORY; ntStatus = STATUS_SUCCESS; goto error; } #ifdef _WIN64 if (IsRamEncryptionEnabled() && (volumeType == TC_VOLUME_TYPE_NORMAL || !mount->bProtectHiddenVolume)) VcProtectKeys (Extension->cryptoInfo, VcGetEncryptionID (Extension->cryptoInfo)); #endif 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; /* compute the ID of this volume: SHA-256 of the effective header */ sha256 (Extension->volumeID, readBuffer, TC_VOLUME_HEADER_EFFECTIVE_SIZE); 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_hash, GetSystemDriveCryptoInfo()->master_keydata_hash, sizeof(Extension->cryptoInfo->master_keydata_hash)) == 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: cryptoInfoPtr = mount->bProtectHiddenVolume ? tmpCryptoInfo : Extension->cryptoInfo; 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; 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; // Add extra sector since our virtual partition starts at Extension->BytesPerSector and not 0 Extension->NumberOfCylinders = (Extension->DiskLength / Extension->BytesPerSector) + 1; Extension->PartitionType = 0; Extension->bRawDevice = bRawDevice; memset (Extension->wszVolume, 0, sizeof (Extension->wszVolume)); if ((wcslen (pwszMountVolume) > 8) && (0 == memcmp (pwszMountVolume, WIDE ("\\??\\UNC\\"), 8 * sizeof (WCHAR)))) { /* UNC path */ RtlStringCbPrintfW (Extension->wszVolume, sizeof (Extension->wszVolume), WIDE ("\\??\\\\%s"), pwszMountVolume + 7); } else { RtlStringCbCopyW (Extension->wszVolume, sizeof(Extension->wszVolume),pwszMountVolume); } memset (Extension->wszLabel, 0, sizeof (Extension->wszLabel)); RtlStringCbCopyW (Extension->wszLabel, sizeof(Extension->wszLabel), mount->wszLabel); } // 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) { UNREFERENCED_PARAMETER (DeviceObject); /* Remove compiler warning */ if (Extension->hDeviceFile != NULL) { if (Extension->bRawDevice == FALSE && Extension->bTimeStampValid) { RestoreTimeStamp (Extension); } ZwClose (Extension->hDeviceFile); } ObDereferenceObject (Extension->pfoDeviceFile); if (Extension->cryptoInfo) { crypto_close (Extension->cryptoInfo); Extension->cryptoInfo = NULL; } } NTSTATUS TCSendHostDeviceIoControlRequestEx (PDEVICE_OBJECT DeviceObject, PEXTENSION Extension, ULONG IoControlCode, void *InputBuffer, ULONG InputBufferSize, void *OutputBuffer, ULONG OutputBufferSize) { IO_STATUS_BLOCK IoStatusBlock; NTSTATUS ntStatus; PIRP Irp; UNREFERENCED_PARAMETER(DeviceObject); /* Remove compiler warning */ KeClearEvent (&Extension->keVolumeEvent); Irp = IoBuildDeviceIoControlRequest (IoControlCode, Extension->pFsdDevice, InputBuffer, InputBufferSize, 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 TCSendHostDeviceIoControlRequest (PDEVICE_OBJECT DeviceObject, PEXTENSION Extension, ULONG IoControlCode, void *OutputBuffer, ULONG OutputBufferSize) { return TCSendHostDeviceIoControlRequestEx (DeviceObject, Extension, IoControlCode, NULL, 0, OutputBuffer, OutputBufferSize); } NTSTATUS COMPLETE_IRP (PDEVICE_OBJECT DeviceObject, PIRP Irp, NTSTATUS IrpStatus, ULONG_PTR IrpInformation) { Irp->IoStatus.Status = IrpStatus; Irp->IoStatus.Information = IrpInformation; UNREFERENCED_PARAMETER (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); } } } 3 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 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 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411 1412 1413 1414 1415 1416 1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 1498 1499 1500 1501 1502 1503 1504 1505 1506 1507 1508 1509 1510 1511 1512 1513 1514 1515 1516 1517 1518 1519 1520 1521 1522 1523 1524 1525 1526 1527 1528 1529 1530 1531 1532 1533 1534 1535 1536 1537 1538 1539 1540 1541 1542 1543 1544 1545 1546 1547 1548 1549 1550 1551 1552 1553 1554 1555 1556 1557 1558 1559 1560 1561 1562 1563 1564 1565 1566 1567 1568 1569 1570 1571 1572 1573 1574 1575 1576 1577 1578 1579 1580 1581 1582 1583 1584 1585 1586 1587 1588 1589 1590 1591 1592 1593 1594 1595 1596 1597 1598 1599 1600 1601 1602 1603 1604 1605 1606 1607 1608 1609 1610 1611 1612 1613