diff options
| author | Mounir IDRASSI <mounir.idrassi@idrix.fr> | 2016-04-08 23:51:29 +0200 |
|---|---|---|
| committer | Mounir IDRASSI <mounir.idrassi@idrix.fr> | 2016-04-08 23:53:49 +0200 |
| commit | 60575d9a496bd4b796bab73888b69c249a1f8048 (patch) | |
| tree | dc242c1029d53807c21c6779d68de7e3e83cd597 /src/Driver/Ntdriver.c | |
| parent | 409c0f79be069cd2cf3bdb31ddbbafd938f15791 (diff) | |
| download | VeraCrypt-60575d9a496bd4b796bab73888b69c249a1f8048.tar.gz VeraCrypt-60575d9a496bd4b796bab73888b69c249a1f8048.zip | |
Windows: start implementation of volume ID mechanism that will be used to identify VeraCrypt disk volumes instead of device name.
Diffstat (limited to 'src/Driver/Ntdriver.c')
| -rw-r--r-- | src/Driver/Ntdriver.c | 111 |
1 files changed, 82 insertions, 29 deletions
diff --git a/src/Driver/Ntdriver.c b/src/Driver/Ntdriver.c index 5153c67b..cd3309d2 100644 --- a/src/Driver/Ntdriver.c +++ b/src/Driver/Ntdriver.c @@ -975,7 +975,7 @@ NTSTATUS ProcessMainDeviceControlIrp (PDEVICE_OBJECT DeviceObject, PEXTENSION Ex InitializeObjectAttributes (&ObjectAttributes, &FullFileName, OBJ_CASE_INSENSITIVE | OBJ_KERNEL_HANDLE, NULL, NULL);
- if (opentest->bDetectTCBootLoader || opentest->DetectFilesystem)
+ if (opentest->bDetectTCBootLoader || opentest->DetectFilesystem || opentest->bMatchVolumeID)
access |= FILE_READ_DATA;
ntStatus = ZwCreateFile (&NtFileHandle,
@@ -986,8 +986,9 @@ NTSTATUS ProcessMainDeviceControlIrp (PDEVICE_OBJECT DeviceObject, PEXTENSION Ex {
opentest->TCBootLoaderDetected = FALSE;
opentest->FilesystemDetected = FALSE;
+ opentest->VolumeIDMatched = FALSE;
- if (opentest->bDetectTCBootLoader || opentest->DetectFilesystem)
+ if (opentest->bDetectTCBootLoader || opentest->DetectFilesystem || opentest->bMatchVolumeID)
{
byte *readBuffer = TCalloc (TC_MAX_VOLUME_SECTOR_SIZE);
if (!readBuffer)
@@ -996,49 +997,99 @@ NTSTATUS ProcessMainDeviceControlIrp (PDEVICE_OBJECT DeviceObject, PEXTENSION Ex }
else
{
- // Determine if the first sector contains a portion of the VeraCrypt Boot Loader
-
- offset.QuadPart = 0;
+ if (opentest->bDetectTCBootLoader || opentest->DetectFilesystem)
+ {
+ // Determine if the first sector contains a portion of the VeraCrypt Boot Loader
- ntStatus = ZwReadFile (NtFileHandle,
- NULL,
- NULL,
- NULL,
- &IoStatus,
- readBuffer,
- TC_MAX_VOLUME_SECTOR_SIZE,
- &offset,
- NULL);
+ offset.QuadPart = 0;
- if (NT_SUCCESS (ntStatus))
- {
- size_t i;
+ ntStatus = ZwReadFile (NtFileHandle,
+ NULL,
+ NULL,
+ NULL,
+ &IoStatus,
+ readBuffer,
+ TC_MAX_VOLUME_SECTOR_SIZE,
+ &offset,
+ NULL);
- if (opentest->bDetectTCBootLoader && IoStatus.Information >= TC_SECTOR_SIZE_BIOS)
+ if (NT_SUCCESS (ntStatus))
{
- // Search for the string "VeraCrypt"
- for (i = 0; i < TC_SECTOR_SIZE_BIOS - strlen (TC_APP_NAME); ++i)
+ size_t i;
+
+ if (opentest->bDetectTCBootLoader && IoStatus.Information >= TC_SECTOR_SIZE_BIOS)
{
- if (memcmp (readBuffer + i, TC_APP_NAME, strlen (TC_APP_NAME)) == 0)
+ // Search for the string "VeraCrypt"
+ for (i = 0; i < TC_SECTOR_SIZE_BIOS - strlen (TC_APP_NAME); ++i)
{
- opentest->TCBootLoaderDetected = TRUE;
+ if (memcmp (readBuffer + i, TC_APP_NAME, strlen (TC_APP_NAME)) == 0)
+ {
+ opentest->TCBootLoaderDetected = TRUE;
+ break;
+ }
+ }
+ }
+
+ if (opentest->DetectFilesystem && IoStatus.Information >= sizeof (int64))
+ {
+ switch (BE64 (*(uint64 *) readBuffer))
+ {
+ case 0xEB52904E54465320: // NTFS
+ case 0xEB3C904D53444F53: // FAT16
+ case 0xEB58904D53444F53: // FAT32
+ case 0xEB76904558464154: // exFAT
+
+ opentest->FilesystemDetected = TRUE;
break;
}
}
}
+ }
- if (opentest->DetectFilesystem && IoStatus.Information >= sizeof (int64))
+ if (opentest->bMatchVolumeID)
+ {
+ int volumeType;
+ BYTE volumeID[SHA512_DIGEST_SIZE];
+
+ // Go through all volume types (e.g., normal, hidden)
+ for (volumeType = TC_VOLUME_TYPE_NORMAL;
+ volumeType < TC_VOLUME_TYPE_COUNT;
+ volumeType++)
{
- switch (BE64 (*(uint64 *) readBuffer))
+ /* Read the volume header */
+ switch (volumeType)
{
- case 0xEB52904E54465320: // NTFS
- case 0xEB3C904D53444F53: // FAT16
- case 0xEB58904D53444F53: // FAT32
- case 0xEB76904558464154: // exFAT
+ case TC_VOLUME_TYPE_NORMAL:
+ offset.QuadPart = TC_VOLUME_HEADER_OFFSET;
+ break;
- opentest->FilesystemDetected = TRUE;
+ case TC_VOLUME_TYPE_HIDDEN:
+
+ offset.QuadPart = TC_HIDDEN_VOLUME_HEADER_OFFSET;
break;
}
+
+ ntStatus = ZwReadFile (Extension->hDeviceFile,
+ NULL,
+ NULL,
+ NULL,
+ &IoStatus,
+ readBuffer,
+ TC_MAX_VOLUME_SECTOR_SIZE,
+ &offset,
+ NULL);
+
+ if (NT_SUCCESS (ntStatus))
+ {
+ /* compute the ID of this volume: SHA-512 of the effective header */
+ sha512 (volumeID, readBuffer, TC_VOLUME_HEADER_EFFECTIVE_SIZE);
+
+ if (0 == memcmp (volumeID, opentest->volumeID, SHA512_DIGEST_SIZE))
+ {
+ opentest->VolumeIDMatched = TRUE;
+ break;
+ }
+ }
}
}
@@ -1214,6 +1265,7 @@ NTSTATUS ProcessMainDeviceControlIrp (PDEVICE_OBJECT DeviceObject, PEXTENSION Ex list->ulMountedDrives |= (1 << ListExtension->nDosDriveNo);
RtlStringCbCopyW (list->wszVolume[ListExtension->nDosDriveNo], sizeof(list->wszVolume[ListExtension->nDosDriveNo]),ListExtension->wszVolume);
RtlStringCbCopyW (list->wszLabel[ListExtension->nDosDriveNo], sizeof(list->wszLabel[ListExtension->nDosDriveNo]),ListExtension->wszLabel);
+ memcpy (list->volumeID[ListExtension->nDosDriveNo], ListExtension->volumeID, SHA512_DIGEST_SIZE);
list->diskLength[ListExtension->nDosDriveNo] = ListExtension->DiskLength;
list->ea[ListExtension->nDosDriveNo] = ListExtension->cryptoInfo->ea;
if (ListExtension->cryptoInfo->hiddenVolume)
@@ -1265,6 +1317,7 @@ NTSTATUS ProcessMainDeviceControlIrp (PDEVICE_OBJECT DeviceObject, PEXTENSION Ex prop->uniqueId = ListExtension->UniqueVolumeId;
RtlStringCbCopyW (prop->wszVolume, sizeof(prop->wszVolume),ListExtension->wszVolume);
RtlStringCbCopyW (prop->wszLabel, sizeof(prop->wszLabel),ListExtension->wszLabel);
+ memcpy (prop->volumeID, ListExtension->volumeID, SHA512_DIGEST_SIZE);
prop->bDriverSetLabel = ListExtension->bDriverSetLabel;
prop->diskLength = ListExtension->DiskLength;
prop->ea = ListExtension->cryptoInfo->ea;
|