VeraCrypt
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authorMounir IDRASSI <mounir.idrassi@idrix.fr>2019-02-27 00:09:40 +0100
committerMounir IDRASSI <mounir.idrassi@idrix.fr>2019-03-01 00:35:20 +0100
commit8d7a3187959ed0cf7cf55e7656f8ee595db9a088 (patch)
tree2e591047a621a6226e87b613b8a380a63b78d46b /src/Driver
parentcf48b532b447faa969347fef183c6e8921c4ded2 (diff)
downloadVeraCrypt-8d7a3187959ed0cf7cf55e7656f8ee595db9a088.tar.gz
VeraCrypt-8d7a3187959ed0cf7cf55e7656f8ee595db9a088.zip
Windows: use specific order for EFI boot arguments memory regions that matches the one used by EFI bootloader.
Diffstat (limited to 'src/Driver')
-rw-r--r--src/Driver/DriveFilter.c19
-rw-r--r--src/Driver/DriveFilter.h2
-rw-r--r--src/Driver/Ntdriver.c42
3 files changed, 53 insertions, 10 deletions
diff --git a/src/Driver/DriveFilter.c b/src/Driver/DriveFilter.c
index 5fbacac4..c9efd7fb 100644
--- a/src/Driver/DriveFilter.c
+++ b/src/Driver/DriveFilter.c
@@ -75,28 +75,31 @@ static int64 DecoySystemWipedAreaEnd;
PKTHREAD DecoySystemWipeThread = NULL;
static NTSTATUS DecoySystemWipeResult;
-uint64 BootArgsRegions[] = { EFI_BOOTARGS_REGIONS };
+static uint64 BootArgsRegionsDefault[] = { EFI_BOOTARGS_REGIONS_DEFAULT };
+static uint64 BootArgsRegionsEFI[] = { EFI_BOOTARGS_REGIONS_EFI };
-NTSTATUS LoadBootArguments ()
+NTSTATUS LoadBootArguments (BOOL bIsEfi)
{
NTSTATUS status = STATUS_UNSUCCESSFUL;
PHYSICAL_ADDRESS bootArgsAddr;
byte *mappedBootArgs;
byte *mappedCryptoInfo = NULL;
uint16 bootLoaderArgsIndex;
+ uint64* BootArgsRegionsPtr = bIsEfi? BootArgsRegionsEFI : BootArgsRegionsDefault;
+ size_t BootArgsRegionsCount = bIsEfi? sizeof(BootArgsRegionsEFI)/ sizeof(BootArgsRegionsEFI[0]) : sizeof(BootArgsRegionsDefault)/ sizeof(BootArgsRegionsDefault[0]);
KeInitializeMutex (&MountMutex, 0);
// __debugbreak();
for (bootLoaderArgsIndex = 0;
- bootLoaderArgsIndex < sizeof(BootArgsRegions)/ sizeof(BootArgsRegions[1]) && status != STATUS_SUCCESS;
+ bootLoaderArgsIndex < BootArgsRegionsCount && status != STATUS_SUCCESS;
++bootLoaderArgsIndex)
{
- bootArgsAddr.QuadPart = BootArgsRegions[bootLoaderArgsIndex] + TC_BOOT_LOADER_ARGS_OFFSET;
+ bootArgsAddr.QuadPart = BootArgsRegionsPtr[bootLoaderArgsIndex] + TC_BOOT_LOADER_ARGS_OFFSET;
Dump ("Checking BootArguments at 0x%x\n", bootArgsAddr.LowPart);
- mappedBootArgs = MmMapIoSpace (bootArgsAddr, sizeof (BootArguments), MmCached);
- if (!mappedBootArgs)
- return STATUS_INSUFFICIENT_RESOURCES;
+ mappedBootArgs = MmMapIoSpace (bootArgsAddr, sizeof (BootArguments), MmCached);
+ if (!mappedBootArgs)
+ return STATUS_INSUFFICIENT_RESOURCES;
if (TC_IS_BOOT_ARGUMENTS_SIGNATURE (mappedBootArgs))
{
@@ -118,7 +121,7 @@ NTSTATUS LoadBootArguments ()
// Sanity check: for valid boot argument, the password is less than 64 bytes long
if (bootArguments->BootPassword.Length <= MAX_LEGACY_PASSWORD)
{
- BootLoaderArgsPtr = BootArgsRegions[bootLoaderArgsIndex];
+ BootLoaderArgsPtr = BootArgsRegionsPtr[bootLoaderArgsIndex];
BootArgs = *bootArguments;
BootArgsValid = TRUE;
diff --git a/src/Driver/DriveFilter.h b/src/Driver/DriveFilter.h
index f19609b0..b164fa5b 100644
--- a/src/Driver/DriveFilter.h
+++ b/src/Driver/DriveFilter.h
@@ -70,7 +70,7 @@ CRYPTO_INFO *GetSystemDriveCryptoInfo ();
BOOL IsBootDriveMounted ();
BOOL IsBootEncryptionSetupInProgress ();
BOOL IsHiddenSystemRunning ();
-NTSTATUS LoadBootArguments ();
+NTSTATUS LoadBootArguments (BOOL bIsEfi);
static NTSTATUS SaveDriveVolumeHeader (DriveFilterExtension *Extension);
NTSTATUS StartBootEncryptionSetup (PDEVICE_OBJECT DeviceObject, PIRP irp, PIO_STACK_LOCATION irpSp);
void EmergencyClearAllKeys (PIRP irp, PIO_STACK_LOCATION irpSp);
diff --git a/src/Driver/Ntdriver.c b/src/Driver/Ntdriver.c
index 97fb1bf1..bf57fcdc 100644
--- a/src/Driver/Ntdriver.c
+++ b/src/Driver/Ntdriver.c
@@ -140,12 +140,44 @@ static BOOL EnableExtendedIoctlSupport = FALSE;
static BOOL AllowTrimCommand = FALSE;
static KeSaveExtendedProcessorStateFn KeSaveExtendedProcessorStatePtr = NULL;
static KeRestoreExtendedProcessorStateFn KeRestoreExtendedProcessorStatePtr = NULL;
+static ExGetFirmwareEnvironmentVariableFn ExGetFirmwareEnvironmentVariablePtr = NULL;
POOL_TYPE ExDefaultNonPagedPoolType = NonPagedPool;
ULONG ExDefaultMdlProtection = 0;
PDEVICE_OBJECT VirtualVolumeDeviceObjects[MAX_MOUNTED_VOLUME_DRIVE_NUMBER + 1];
+BOOL IsUefiBoot ()
+{
+ BOOL bStatus = FALSE;
+ NTSTATUS ntStatus = STATUS_NOT_IMPLEMENTED;
+
+ Dump ("IsUefiBoot BEGIN\n");
+ ASSERT (KeGetCurrentIrql() == PASSIVE_LEVEL);
+
+ if (ExGetFirmwareEnvironmentVariablePtr)
+ {
+ ULONG valueLengh = 0;
+ UNICODE_STRING emptyName;
+ GUID guid;
+ RtlInitUnicodeString(&emptyName, L"");
+ memset (&guid, 0, sizeof(guid));
+ Dump ("IsUefiBoot calling ExGetFirmwareEnvironmentVariable\n");
+ ntStatus = ExGetFirmwareEnvironmentVariablePtr (&emptyName, &guid, NULL, &valueLengh, NULL);
+ Dump ("IsUefiBoot ExGetFirmwareEnvironmentVariable returned 0x%08x\n", ntStatus);
+ }
+ else
+ {
+ Dump ("IsUefiBoot ExGetFirmwareEnvironmentVariable not found on the system\n");
+ }
+
+ if (STATUS_NOT_IMPLEMENTED != ntStatus)
+ bStatus = TRUE;
+
+ Dump ("IsUefiBoot bStatus = %s END\n", bStatus? "TRUE" : "FALSE");
+ return bStatus;
+}
+
void GetDriverRandomSeed (unsigned char* pbRandSeed, size_t cbRandSeed)
{
LARGE_INTEGER iSeed, iSeed2;
@@ -248,6 +280,14 @@ NTSTATUS DriverEntry (PDRIVER_OBJECT DriverObject, PUNICODE_STRING RegistryPath)
KeSaveExtendedProcessorStatePtr = (KeSaveExtendedProcessorStateFn) MmGetSystemRoutineAddress(&saveFuncName);
KeRestoreExtendedProcessorStatePtr = (KeRestoreExtendedProcessorStateFn) MmGetSystemRoutineAddress(&restoreFuncName);
}
+
+ // ExGetFirmwareEnvironmentVariable is available starting from Windows 8
+ if ((OsMajorVersion > 6) || (OsMajorVersion == 6 && OsMinorVersion >= 2))
+ {
+ UNICODE_STRING funcName;
+ RtlInitUnicodeString(&funcName, L"ExGetFirmwareEnvironmentVariable");
+ ExGetFirmwareEnvironmentVariablePtr = (ExGetFirmwareEnvironmentVariableFn) MmGetSystemRoutineAddress(&funcName);
+ }
// Load dump filter if the main driver is already loaded
if (NT_SUCCESS (TCDeviceIoControl (NT_ROOT_PREFIX, TC_IOCTL_GET_DRIVER_VERSION, NULL, 0, &version, sizeof (version))))
@@ -278,7 +318,7 @@ NTSTATUS DriverEntry (PDRIVER_OBJECT DriverObject, PUNICODE_STRING RegistryPath)
TC_BUG_CHECK (STATUS_INVALID_PARAMETER);
}
- LoadBootArguments();
+ LoadBootArguments(IsUefiBoot ());
VolumeClassFilterRegistered = IsVolumeClassFilterRegistered();
DriverObject->DriverExtension->AddDevice = DriverAddDevice;