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| author | Mounir IDRASSI <mounir.idrassi@idrix.fr> | 2021-02-27 23:05:40 +0100 |
|---|---|---|
| committer | Mounir IDRASSI <mounir.idrassi@idrix.fr> | 2021-02-27 23:07:10 +0100 |
| commit | c6d63e9365a3c591e6451aeeb049c24de12649bf (patch) | |
| tree | 9763159e3c6458b823e113a591001e387a1c6654 /src/Driver/VolumeFilter.c | |
| parent | c1e81d96924e5e68257f67b65f1dda72e0103bdc (diff) | |
| download | VeraCrypt-c6d63e9365a3c591e6451aeeb049c24de12649bf.tar.gz VeraCrypt-c6d63e9365a3c591e6451aeeb049c24de12649bf.zip | |
Windows: Block Windows from resizing system partition if it is encrypted. This avoid issues during Windows Upgrade that sometimes resizes system partition which create problems if it is encrypted by VeraCrypt
Diffstat (limited to 'src/Driver/VolumeFilter.c')
| -rw-r--r-- | src/Driver/VolumeFilter.c | 56 |
1 files changed, 38 insertions, 18 deletions
diff --git a/src/Driver/VolumeFilter.c b/src/Driver/VolumeFilter.c index 14e496bc..29d02673 100644 --- a/src/Driver/VolumeFilter.c +++ b/src/Driver/VolumeFilter.c @@ -125,6 +125,32 @@ static NTSTATUS OnStartDeviceCompleted (PDEVICE_OBJECT filterDeviceObject, PIRP return STATUS_CONTINUE_COMPLETION; } +static BOOL IsSystemVolumePartition (VolumeFilterExtension *Extension) +{ + NTSTATUS status; + BOOL bRet = FALSE; + DriveFilterExtension *bootDriveExtension = GetBootDriveFilterExtension(); + STORAGE_DEVICE_NUMBER storageDeviceNumber; + + if (!bootDriveExtension->SystemStorageDeviceNumberValid) + TC_BUG_CHECK (STATUS_INVALID_PARAMETER); + + status = SendDeviceIoControlRequest (Extension->LowerDeviceObject, IOCTL_STORAGE_GET_DEVICE_NUMBER, NULL, 0, &storageDeviceNumber, sizeof (storageDeviceNumber)); + + if (NT_SUCCESS (status) && bootDriveExtension->SystemStorageDeviceNumber == storageDeviceNumber.DeviceNumber) + { + PARTITION_INFORMATION_EX partition; + status = SendDeviceIoControlRequest (Extension->LowerDeviceObject, IOCTL_DISK_GET_PARTITION_INFO_EX, NULL, 0, &partition, sizeof (partition)); + + if (NT_SUCCESS (status) && partition.StartingOffset.QuadPart == bootDriveExtension->ConfiguredEncryptedAreaStart) + { + bRet = TRUE; + } + } + + return bRet; +} + static NTSTATUS DispatchControl (PDEVICE_OBJECT DeviceObject, PIRP Irp, VolumeFilterExtension *Extension, PIO_STACK_LOCATION irpSp) { @@ -139,25 +165,10 @@ static NTSTATUS DispatchControl (PDEVICE_OBJECT DeviceObject, PIRP Irp, VolumeFi case IOCTL_DISK_IS_WRITABLE: { // All volumes except the system volume must be read-only - - DriveFilterExtension *bootDriveExtension = GetBootDriveFilterExtension(); - STORAGE_DEVICE_NUMBER storageDeviceNumber; - - if (!bootDriveExtension->SystemStorageDeviceNumberValid) - TC_BUG_CHECK (STATUS_INVALID_PARAMETER); - - status = SendDeviceIoControlRequest (Extension->LowerDeviceObject, IOCTL_STORAGE_GET_DEVICE_NUMBER, NULL, 0, &storageDeviceNumber, sizeof (storageDeviceNumber)); - - if (NT_SUCCESS (status) && bootDriveExtension->SystemStorageDeviceNumber == storageDeviceNumber.DeviceNumber) + if (IsSystemVolumePartition(Extension)) { - PARTITION_INFORMATION_EX partition; - status = SendDeviceIoControlRequest (Extension->LowerDeviceObject, IOCTL_DISK_GET_PARTITION_INFO_EX, NULL, 0, &partition, sizeof (partition)); - - if (NT_SUCCESS (status) && partition.StartingOffset.QuadPart == bootDriveExtension->ConfiguredEncryptedAreaStart) - { - IoReleaseRemoveLock (&Extension->Queue.RemoveLock, Irp); - return TCCompleteDiskIrp (Irp, STATUS_SUCCESS, 0); - } + IoReleaseRemoveLock (&Extension->Queue.RemoveLock, Irp); + return TCCompleteDiskIrp (Irp, STATUS_SUCCESS, 0); } IoReleaseRemoveLock (&Extension->Queue.RemoveLock, Irp); @@ -194,6 +205,15 @@ static NTSTATUS DispatchControl (PDEVICE_OBJECT DeviceObject, PIRP Irp, VolumeFi IoReleaseRemoveLock (&Extension->Queue.RemoveLock, Irp); return TCCompleteDiskIrp (Irp, STATUS_SUCCESS, 0); + + case IOCTL_DISK_GROW_PARTITION: + if (IsSystemVolumePartition(Extension)) + { + Dump ("VolumeFilter-DispatchControl: IOCTL_DISK_GROW_PARTITION blocked\n"); + IoReleaseRemoveLock (&Extension->Queue.RemoveLock, Irp); + return TCCompleteDiskIrp (Irp, STATUS_UNSUCCESSFUL, 0); + } + break; } } |