diff options
| author | Mounir IDRASSI <mounir.idrassi@idrix.fr> | 2019-12-08 22:51:49 +0100 |
|---|---|---|
| committer | Mounir IDRASSI <mounir.idrassi@idrix.fr> | 2019-12-08 23:42:47 +0100 |
| commit | 5e96a5c44c3c78a901d77297517fa4842a297eb9 (patch) | |
| tree | c96c1f8cfc13c9435d26d31d267a5a125493349d /src/Driver | |
| parent | 7f1e21e6a1103fd4a488ddbe63571c6ffecb38ca (diff) | |
| download | VeraCrypt-5e96a5c44c3c78a901d77297517fa4842a297eb9.tar.gz VeraCrypt-5e96a5c44c3c78a901d77297517fa4842a297eb9.zip | |
Windows: enhancements to the mechanism preserving file timestamps, especially for keyfiles.
Diffstat (limited to 'src/Driver')
| -rw-r--r-- | src/Driver/Ntvol.c | 34 |
1 files changed, 33 insertions, 1 deletions
diff --git a/src/Driver/Ntvol.c b/src/Driver/Ntvol.c index c3344fd0..e88105ca 100644 --- a/src/Driver/Ntvol.c +++ b/src/Driver/Ntvol.c @@ -303,7 +303,7 @@ NTSTATUS TCOpenVolume (PDEVICE_OBJECT DeviceObject, if (mount->bMountReadOnly || ntStatus == STATUS_ACCESS_DENIED) { ntStatus = ZwCreateFile (&Extension->hDeviceFile, - GENERIC_READ | SYNCHRONIZE, + GENERIC_READ | (!bRawDevice && mount->bPreserveTimestamp? FILE_WRITE_ATTRIBUTES : 0) | SYNCHRONIZE, &oaFileAttributes, &IoStatusBlock, NULL, @@ -318,6 +318,26 @@ NTSTATUS TCOpenVolume (PDEVICE_OBJECT DeviceObject, NULL, 0); + if (!NT_SUCCESS (ntStatus) && !bRawDevice && mount->bPreserveTimestamp) + { + /* try again without FILE_WRITE_ATTRIBUTES */ + 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; @@ -362,6 +382,18 @@ NTSTATUS TCOpenVolume (PDEVICE_OBJECT DeviceObject, Extension->fileLastWriteTime = FileBasicInfo.LastWriteTime; Extension->fileLastChangeTime = FileBasicInfo.ChangeTime; Extension->bTimeStampValid = TRUE; + + // we tell the system not to update LastAccessTime, LastWriteTime, and ChangeTime + FileBasicInfo.CreationTime.QuadPart = 0; + FileBasicInfo.LastAccessTime.QuadPart = -1; + FileBasicInfo.LastWriteTime.QuadPart = -1; + FileBasicInfo.ChangeTime.QuadPart = -1; + + ZwSetInformationFile (Extension->hDeviceFile, + &IoStatusBlock, + &FileBasicInfo, + sizeof (FileBasicInfo), + FileBasicInformation); } ntStatus = ZwQueryInformationFile (Extension->hDeviceFile, |