VeraCrypt
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authorMounir IDRASSI <mounir.idrassi@idrix.fr>2019-12-08 21:51:49 (GMT)
committerMounir IDRASSI <mounir.idrassi@idrix.fr>2019-12-08 22:42:47 (GMT)
commit5e96a5c44c3c78a901d77297517fa4842a297eb9 (patch)
treec96c1f8cfc13c9435d26d31d267a5a125493349d /src/Driver
parent7f1e21e6a1103fd4a488ddbe63571c6ffecb38ca (diff)
downloadVeraCrypt-5e96a5c44c3c78a901d77297517fa4842a297eb9.zip
VeraCrypt-5e96a5c44c3c78a901d77297517fa4842a297eb9.tar.gz
Windows: enhancements to the mechanism preserving file timestamps, especially for keyfiles.
Diffstat (limited to 'src/Driver')
-rw-r--r--src/Driver/Ntvol.c34
1 files changed, 33 insertions, 1 deletions
diff --git a/src/Driver/Ntvol.c b/src/Driver/Ntvol.c
index c3344fd..e88105c 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,