-
Notifications
You must be signed in to change notification settings - Fork 661
/
mirror.c
1803 lines (1531 loc) · 61.1 KB
/
mirror.c
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
/*
Dokan : user-mode file system library for Windows
Copyright (C) 2020 - 2021 Google, Inc.
Copyright (C) 2015 - 2019 Adrien J. <liryna.stark@gmail.com> and Maxime C. <maxime@islog.com>
Copyright (C) 2007 - 2011 Hiroki Asakawa <info@dokan-dev.net>
http://dokan-dev.github.io
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
*/
#include "../../dokan/dokan.h"
#include "../../dokan/fileinfo.h"
#include <malloc.h>
#include <stdio.h>
#include <stdlib.h>
#include <winbase.h>
// Enable Long Paths on Windows 10 version 1607 and later by changing
// the OS configuration (see Microsoft own documentation for the steps)
// and rebuild the mirror with the following line uncommented.
#define WIN10_ENABLE_LONG_PATH
#ifdef WIN10_ENABLE_LONG_PATH
//dirty but should be enough
#define DOKAN_MAX_PATH 32768
#else
#define DOKAN_MAX_PATH MAX_PATH
#endif // DEBUG
BOOL g_UseStdErr;
BOOL g_DebugMode;
BOOL g_CaseSensitive;
BOOL g_HasSeSecurityPrivilege;
BOOL g_ImpersonateCallerUser;
static void DbgPrint(LPCWSTR format, ...) {
if (g_DebugMode) {
const WCHAR *outputString;
WCHAR *buffer = NULL;
size_t length;
va_list argp;
va_start(argp, format);
length = _vscwprintf(format, argp) + 1;
buffer = _malloca(length * sizeof(WCHAR));
if (buffer) {
vswprintf_s(buffer, length, format, argp);
outputString = buffer;
} else {
outputString = format;
}
if (g_UseStdErr)
fputws(outputString, stderr);
else
OutputDebugStringW(outputString);
if (buffer)
_freea(buffer);
va_end(argp);
if (g_UseStdErr)
fflush(stderr);
}
}
static WCHAR gRootDirectory[DOKAN_MAX_PATH] = L"C:";
static WCHAR gMountPoint[DOKAN_MAX_PATH] = L"M:\\";
static WCHAR gUNCName[DOKAN_MAX_PATH] = L"";
static WCHAR gVolumeName[MAX_PATH + 1] = L"DOKAN";
static void GetFilePath(PWCHAR filePath, ULONG numberOfElements,
LPCWSTR FileName) {
wcsncpy_s(filePath, numberOfElements, gRootDirectory, wcslen(gRootDirectory));
size_t unclen = wcslen(gUNCName);
if (unclen > 0 && _wcsnicmp(FileName, gUNCName, unclen) == 0) {
if (_wcsnicmp(FileName + unclen, L".", 1) != 0) {
wcsncat_s(filePath, numberOfElements, FileName + unclen,
wcslen(FileName) - unclen);
}
} else {
wcsncat_s(filePath, numberOfElements, FileName, wcslen(FileName));
}
}
static void PrintUserName(PDOKAN_FILE_INFO DokanFileInfo) {
HANDLE handle;
UCHAR buffer[1024];
DWORD returnLength;
WCHAR accountName[256];
WCHAR domainName[256];
DWORD accountLength = sizeof(accountName) / sizeof(WCHAR);
DWORD domainLength = sizeof(domainName) / sizeof(WCHAR);
PTOKEN_USER tokenUser;
SID_NAME_USE snu;
if (!g_DebugMode)
return;
handle = DokanOpenRequestorToken(DokanFileInfo);
if (handle == INVALID_HANDLE_VALUE) {
DbgPrint(L" DokanOpenRequestorToken failed\n");
return;
}
if (!GetTokenInformation(handle, TokenUser, buffer, sizeof(buffer),
&returnLength)) {
DbgPrint(L" GetTokenInformaiton failed: %d\n", GetLastError());
CloseHandle(handle);
return;
}
CloseHandle(handle);
tokenUser = (PTOKEN_USER)buffer;
if (!LookupAccountSid(NULL, tokenUser->User.Sid, accountName, &accountLength,
domainName, &domainLength, &snu)) {
DbgPrint(L" LookupAccountSid failed: %d\n", GetLastError());
return;
}
DbgPrint(L" AccountName: %s, DomainName: %s\n", accountName, domainName);
}
static BOOL AddSeSecurityNamePrivilege() {
HANDLE token = 0;
DbgPrint(
L"## Attempting to add SE_SECURITY_NAME privilege to process token ##\n");
DWORD err;
LUID luid;
if (!LookupPrivilegeValue(0, SE_SECURITY_NAME, &luid)) {
err = GetLastError();
if (err != ERROR_SUCCESS) {
DbgPrint(L" failed: Unable to lookup privilege value. error = %u\n",
err);
return FALSE;
}
}
LUID_AND_ATTRIBUTES attr;
attr.Attributes = SE_PRIVILEGE_ENABLED;
attr.Luid = luid;
TOKEN_PRIVILEGES priv;
priv.PrivilegeCount = 1;
priv.Privileges[0] = attr;
if (!OpenProcessToken(GetCurrentProcess(),
TOKEN_ADJUST_PRIVILEGES | TOKEN_QUERY, &token)) {
err = GetLastError();
if (err != ERROR_SUCCESS) {
DbgPrint(L" failed: Unable obtain process token. error = %u\n", err);
return FALSE;
}
}
TOKEN_PRIVILEGES oldPriv;
DWORD retSize;
AdjustTokenPrivileges(token, FALSE, &priv, sizeof(TOKEN_PRIVILEGES), &oldPriv,
&retSize);
err = GetLastError();
if (err != ERROR_SUCCESS) {
DbgPrint(L" failed: Unable to adjust token privileges: %u\n", err);
CloseHandle(token);
return FALSE;
}
BOOL privAlreadyPresent = FALSE;
for (unsigned int i = 0; i < oldPriv.PrivilegeCount; i++) {
if (oldPriv.Privileges[i].Luid.HighPart == luid.HighPart &&
oldPriv.Privileges[i].Luid.LowPart == luid.LowPart) {
privAlreadyPresent = TRUE;
break;
}
}
DbgPrint(privAlreadyPresent ? L" success: privilege already present\n"
: L" success: privilege added\n");
if (token)
CloseHandle(token);
return TRUE;
}
#define MirrorCheckFlag(val, flag) \
if (val & flag) { \
DbgPrint(L"\t" L#flag L"\n"); \
}
static NTSTATUS DOKAN_CALLBACK
MirrorCreateFile(LPCWSTR FileName, PDOKAN_IO_SECURITY_CONTEXT SecurityContext,
ACCESS_MASK DesiredAccess, ULONG FileAttributes,
ULONG ShareAccess, ULONG CreateDisposition,
ULONG CreateOptions, PDOKAN_FILE_INFO DokanFileInfo) {
WCHAR filePath[DOKAN_MAX_PATH];
HANDLE handle;
DWORD fileAttr;
NTSTATUS status = STATUS_SUCCESS;
DWORD creationDisposition;
DWORD fileAttributesAndFlags;
DWORD error = 0;
SECURITY_ATTRIBUTES securityAttrib;
ACCESS_MASK genericDesiredAccess;
// userTokenHandle is for Impersonate Caller User Option
HANDLE userTokenHandle = INVALID_HANDLE_VALUE;
securityAttrib.nLength = sizeof(securityAttrib);
securityAttrib.lpSecurityDescriptor =
SecurityContext->AccessState.SecurityDescriptor;
securityAttrib.bInheritHandle = FALSE;
DokanMapKernelToUserCreateFileFlags(
DesiredAccess, FileAttributes, CreateOptions, CreateDisposition,
&genericDesiredAccess, &fileAttributesAndFlags, &creationDisposition);
GetFilePath(filePath, DOKAN_MAX_PATH, FileName);
DbgPrint(L"CreateFile : %s\n", filePath);
PrintUserName(DokanFileInfo);
/*
if (ShareMode == 0 && AccessMode & FILE_WRITE_DATA)
ShareMode = FILE_SHARE_WRITE;
else if (ShareMode == 0)
ShareMode = FILE_SHARE_READ;
*/
DbgPrint(L"\tShareMode = 0x%x\n", ShareAccess);
MirrorCheckFlag(ShareAccess, FILE_SHARE_READ);
MirrorCheckFlag(ShareAccess, FILE_SHARE_WRITE);
MirrorCheckFlag(ShareAccess, FILE_SHARE_DELETE);
DbgPrint(L"\tDesiredAccess = 0x%x\n", DesiredAccess);
MirrorCheckFlag(DesiredAccess, GENERIC_READ);
MirrorCheckFlag(DesiredAccess, GENERIC_WRITE);
MirrorCheckFlag(DesiredAccess, GENERIC_EXECUTE);
MirrorCheckFlag(DesiredAccess, DELETE);
MirrorCheckFlag(DesiredAccess, FILE_READ_DATA);
MirrorCheckFlag(DesiredAccess, FILE_READ_ATTRIBUTES);
MirrorCheckFlag(DesiredAccess, FILE_READ_EA);
MirrorCheckFlag(DesiredAccess, READ_CONTROL);
MirrorCheckFlag(DesiredAccess, FILE_WRITE_DATA);
MirrorCheckFlag(DesiredAccess, FILE_WRITE_ATTRIBUTES);
MirrorCheckFlag(DesiredAccess, FILE_WRITE_EA);
MirrorCheckFlag(DesiredAccess, FILE_APPEND_DATA);
MirrorCheckFlag(DesiredAccess, WRITE_DAC);
MirrorCheckFlag(DesiredAccess, WRITE_OWNER);
MirrorCheckFlag(DesiredAccess, SYNCHRONIZE);
MirrorCheckFlag(DesiredAccess, FILE_EXECUTE);
MirrorCheckFlag(DesiredAccess, STANDARD_RIGHTS_READ);
MirrorCheckFlag(DesiredAccess, STANDARD_RIGHTS_WRITE);
MirrorCheckFlag(DesiredAccess, STANDARD_RIGHTS_EXECUTE);
// When filePath is a directory, needs to change the flag so that the file can
// be opened.
fileAttr = GetFileAttributes(filePath);
if (fileAttr != INVALID_FILE_ATTRIBUTES &&
fileAttr & FILE_ATTRIBUTE_DIRECTORY) {
if (CreateOptions & FILE_NON_DIRECTORY_FILE) {
DbgPrint(L"\tCannot open a dir as a file\n");
return STATUS_FILE_IS_A_DIRECTORY;
}
DokanFileInfo->IsDirectory = TRUE;
// Needed by FindFirstFile to list files in it
// TODO: use ReOpenFile in MirrorFindFiles to set share read temporary
ShareAccess |= FILE_SHARE_READ;
}
DbgPrint(L"\tFlagsAndAttributes = 0x%x\n", fileAttributesAndFlags);
MirrorCheckFlag(fileAttributesAndFlags, FILE_ATTRIBUTE_ARCHIVE);
MirrorCheckFlag(fileAttributesAndFlags, FILE_ATTRIBUTE_COMPRESSED);
MirrorCheckFlag(fileAttributesAndFlags, FILE_ATTRIBUTE_DEVICE);
MirrorCheckFlag(fileAttributesAndFlags, FILE_ATTRIBUTE_DIRECTORY);
MirrorCheckFlag(fileAttributesAndFlags, FILE_ATTRIBUTE_ENCRYPTED);
MirrorCheckFlag(fileAttributesAndFlags, FILE_ATTRIBUTE_HIDDEN);
MirrorCheckFlag(fileAttributesAndFlags, FILE_ATTRIBUTE_INTEGRITY_STREAM);
MirrorCheckFlag(fileAttributesAndFlags, FILE_ATTRIBUTE_NORMAL);
MirrorCheckFlag(fileAttributesAndFlags, FILE_ATTRIBUTE_NOT_CONTENT_INDEXED);
MirrorCheckFlag(fileAttributesAndFlags, FILE_ATTRIBUTE_NO_SCRUB_DATA);
MirrorCheckFlag(fileAttributesAndFlags, FILE_ATTRIBUTE_OFFLINE);
MirrorCheckFlag(fileAttributesAndFlags, FILE_ATTRIBUTE_READONLY);
MirrorCheckFlag(fileAttributesAndFlags, FILE_ATTRIBUTE_REPARSE_POINT);
MirrorCheckFlag(fileAttributesAndFlags, FILE_ATTRIBUTE_SPARSE_FILE);
MirrorCheckFlag(fileAttributesAndFlags, FILE_ATTRIBUTE_SYSTEM);
MirrorCheckFlag(fileAttributesAndFlags, FILE_ATTRIBUTE_TEMPORARY);
MirrorCheckFlag(fileAttributesAndFlags, FILE_ATTRIBUTE_VIRTUAL);
MirrorCheckFlag(fileAttributesAndFlags, FILE_FLAG_WRITE_THROUGH);
MirrorCheckFlag(fileAttributesAndFlags, FILE_FLAG_OVERLAPPED);
MirrorCheckFlag(fileAttributesAndFlags, FILE_FLAG_NO_BUFFERING);
MirrorCheckFlag(fileAttributesAndFlags, FILE_FLAG_RANDOM_ACCESS);
MirrorCheckFlag(fileAttributesAndFlags, FILE_FLAG_SEQUENTIAL_SCAN);
MirrorCheckFlag(fileAttributesAndFlags, FILE_FLAG_DELETE_ON_CLOSE);
MirrorCheckFlag(fileAttributesAndFlags, FILE_FLAG_BACKUP_SEMANTICS);
MirrorCheckFlag(fileAttributesAndFlags, FILE_FLAG_POSIX_SEMANTICS);
MirrorCheckFlag(fileAttributesAndFlags, FILE_FLAG_OPEN_REPARSE_POINT);
MirrorCheckFlag(fileAttributesAndFlags, FILE_FLAG_OPEN_NO_RECALL);
MirrorCheckFlag(fileAttributesAndFlags, SECURITY_ANONYMOUS);
MirrorCheckFlag(fileAttributesAndFlags, SECURITY_IDENTIFICATION);
MirrorCheckFlag(fileAttributesAndFlags, SECURITY_IMPERSONATION);
MirrorCheckFlag(fileAttributesAndFlags, SECURITY_DELEGATION);
MirrorCheckFlag(fileAttributesAndFlags, SECURITY_CONTEXT_TRACKING);
MirrorCheckFlag(fileAttributesAndFlags, SECURITY_EFFECTIVE_ONLY);
MirrorCheckFlag(fileAttributesAndFlags, SECURITY_SQOS_PRESENT);
if (g_CaseSensitive)
fileAttributesAndFlags |= FILE_FLAG_POSIX_SEMANTICS;
if (creationDisposition == CREATE_NEW) {
DbgPrint(L"\tCREATE_NEW\n");
} else if (creationDisposition == OPEN_ALWAYS) {
DbgPrint(L"\tOPEN_ALWAYS\n");
} else if (creationDisposition == CREATE_ALWAYS) {
DbgPrint(L"\tCREATE_ALWAYS\n");
} else if (creationDisposition == OPEN_EXISTING) {
DbgPrint(L"\tOPEN_EXISTING\n");
} else if (creationDisposition == TRUNCATE_EXISTING) {
DbgPrint(L"\tTRUNCATE_EXISTING\n");
} else {
DbgPrint(L"\tUNKNOWN creationDisposition!\n");
}
if (g_ImpersonateCallerUser) {
userTokenHandle = DokanOpenRequestorToken(DokanFileInfo);
if (userTokenHandle == INVALID_HANDLE_VALUE) {
DbgPrint(L" DokanOpenRequestorToken failed\n");
// Should we return some error?
}
}
if (DokanFileInfo->IsDirectory) {
// It is a create directory request
if (creationDisposition == CREATE_NEW ||
creationDisposition == OPEN_ALWAYS) {
if (g_ImpersonateCallerUser && userTokenHandle != INVALID_HANDLE_VALUE) {
// if g_ImpersonateCallerUser option is on, call the ImpersonateLoggedOnUser function.
if (!ImpersonateLoggedOnUser(userTokenHandle)) {
// handle the error if failed to impersonate
DbgPrint(L"\tImpersonateLoggedOnUser failed.\n");
}
}
//We create folder
if (!CreateDirectory(filePath, &securityAttrib)) {
error = GetLastError();
// Fail to create folder for OPEN_ALWAYS is not an error
if (error != ERROR_ALREADY_EXISTS ||
creationDisposition == CREATE_NEW) {
DbgPrint(L"\terror code = %d\n\n", error);
status = DokanNtStatusFromWin32(error);
}
}
if (g_ImpersonateCallerUser && userTokenHandle != INVALID_HANDLE_VALUE) {
// Clean Up operation for impersonate
DWORD lastError = GetLastError();
if (status != STATUS_SUCCESS) //Keep the handle open for CreateFile
CloseHandle(userTokenHandle);
RevertToSelf();
SetLastError(lastError);
}
}
if (status == STATUS_SUCCESS) {
//Check first if we're trying to open a file as a directory.
if (fileAttr != INVALID_FILE_ATTRIBUTES &&
!(fileAttr & FILE_ATTRIBUTE_DIRECTORY) &&
(CreateOptions & FILE_DIRECTORY_FILE)) {
return STATUS_NOT_A_DIRECTORY;
}
if (g_ImpersonateCallerUser && userTokenHandle != INVALID_HANDLE_VALUE) {
// if g_ImpersonateCallerUser option is on, call the ImpersonateLoggedOnUser function.
if (!ImpersonateLoggedOnUser(userTokenHandle)) {
// handle the error if failed to impersonate
DbgPrint(L"\tImpersonateLoggedOnUser failed.\n");
}
}
// FILE_FLAG_BACKUP_SEMANTICS is required for opening directory handles
handle =
CreateFile(filePath, genericDesiredAccess, ShareAccess,
&securityAttrib, OPEN_EXISTING,
fileAttributesAndFlags | FILE_FLAG_BACKUP_SEMANTICS, NULL);
if (g_ImpersonateCallerUser && userTokenHandle != INVALID_HANDLE_VALUE) {
// Clean Up operation for impersonate
DWORD lastError = GetLastError();
CloseHandle(userTokenHandle);
RevertToSelf();
SetLastError(lastError);
}
if (handle == INVALID_HANDLE_VALUE) {
error = GetLastError();
DbgPrint(L"\terror code = %d\n\n", error);
status = DokanNtStatusFromWin32(error);
} else {
DokanFileInfo->Context =
(ULONG64)handle; // save the file handle in Context
// Open succeed but we need to inform the driver
// that the dir open and not created by returning STATUS_OBJECT_NAME_COLLISION
if (creationDisposition == OPEN_ALWAYS &&
fileAttr != INVALID_FILE_ATTRIBUTES)
return STATUS_OBJECT_NAME_COLLISION;
}
}
} else {
// It is a create file request
// Cannot overwrite a hidden or system file if flag not set
if (fileAttr != INVALID_FILE_ATTRIBUTES &&
((!(fileAttributesAndFlags & FILE_ATTRIBUTE_HIDDEN) &&
(fileAttr & FILE_ATTRIBUTE_HIDDEN)) ||
(!(fileAttributesAndFlags & FILE_ATTRIBUTE_SYSTEM) &&
(fileAttr & FILE_ATTRIBUTE_SYSTEM))) &&
(creationDisposition == TRUNCATE_EXISTING ||
creationDisposition == CREATE_ALWAYS))
return STATUS_ACCESS_DENIED;
// Cannot delete a read only file
if ((fileAttr != INVALID_FILE_ATTRIBUTES &&
(fileAttr & FILE_ATTRIBUTE_READONLY) ||
(fileAttributesAndFlags & FILE_ATTRIBUTE_READONLY)) &&
(fileAttributesAndFlags & FILE_FLAG_DELETE_ON_CLOSE))
return STATUS_CANNOT_DELETE;
// Truncate should always be used with write access
if (creationDisposition == TRUNCATE_EXISTING)
genericDesiredAccess |= GENERIC_WRITE;
if (g_ImpersonateCallerUser && userTokenHandle != INVALID_HANDLE_VALUE) {
// if g_ImpersonateCallerUser option is on, call the ImpersonateLoggedOnUser function.
if (!ImpersonateLoggedOnUser(userTokenHandle)) {
// handle the error if failed to impersonate
DbgPrint(L"\tImpersonateLoggedOnUser failed.\n");
}
}
handle = CreateFile(
filePath,
genericDesiredAccess, // GENERIC_READ|GENERIC_WRITE|GENERIC_EXECUTE,
ShareAccess,
&securityAttrib, // security attribute
creationDisposition,
fileAttributesAndFlags, // |FILE_FLAG_NO_BUFFERING,
NULL); // template file handle
if (g_ImpersonateCallerUser && userTokenHandle != INVALID_HANDLE_VALUE) {
// Clean Up operation for impersonate
DWORD lastError = GetLastError();
CloseHandle(userTokenHandle);
RevertToSelf();
SetLastError(lastError);
}
if (handle == INVALID_HANDLE_VALUE) {
error = GetLastError();
DbgPrint(L"\terror code = %d\n\n", error);
status = DokanNtStatusFromWin32(error);
} else {
//Need to update FileAttributes with previous when Overwrite file
if (fileAttr != INVALID_FILE_ATTRIBUTES &&
creationDisposition == TRUNCATE_EXISTING) {
SetFileAttributes(filePath, fileAttributesAndFlags | fileAttr);
}
DokanFileInfo->Context =
(ULONG64)handle; // save the file handle in Context
if (creationDisposition == OPEN_ALWAYS ||
creationDisposition == CREATE_ALWAYS) {
error = GetLastError();
if (error == ERROR_ALREADY_EXISTS) {
DbgPrint(L"\tOpen an already existing file\n");
// Open succeed but we need to inform the driver
// that the file open and not created by returning STATUS_OBJECT_NAME_COLLISION
status = STATUS_OBJECT_NAME_COLLISION;
}
}
}
}
DbgPrint(L"\n");
return status;
}
#pragma warning(push)
#pragma warning(disable : 4305)
static void DOKAN_CALLBACK MirrorCloseFile(LPCWSTR FileName,
PDOKAN_FILE_INFO DokanFileInfo) {
WCHAR filePath[DOKAN_MAX_PATH];
GetFilePath(filePath, DOKAN_MAX_PATH, FileName);
if (DokanFileInfo->Context) {
DbgPrint(L"CloseFile: %s\n", filePath);
DbgPrint(L"\terror : not cleanuped file\n\n");
CloseHandle((HANDLE)DokanFileInfo->Context);
DokanFileInfo->Context = 0;
} else {
DbgPrint(L"Close: %s\n\n", filePath);
}
}
static void DOKAN_CALLBACK MirrorCleanup(LPCWSTR FileName,
PDOKAN_FILE_INFO DokanFileInfo) {
WCHAR filePath[DOKAN_MAX_PATH];
GetFilePath(filePath, DOKAN_MAX_PATH, FileName);
if (DokanFileInfo->Context) {
DbgPrint(L"Cleanup: %s\n\n", filePath);
CloseHandle((HANDLE)(DokanFileInfo->Context));
DokanFileInfo->Context = 0;
} else {
DbgPrint(L"Cleanup: %s\n\tinvalid handle\n\n", filePath);
}
if (DokanFileInfo->DeleteOnClose) {
// Should already be deleted by CloseHandle
// if open with FILE_FLAG_DELETE_ON_CLOSE
DbgPrint(L"\tDeleteOnClose\n");
if (DokanFileInfo->IsDirectory) {
DbgPrint(L" DeleteDirectory ");
if (!RemoveDirectory(filePath)) {
DbgPrint(L"error code = %d\n\n", GetLastError());
} else {
DbgPrint(L"success\n\n");
}
} else {
DbgPrint(L" DeleteFile ");
if (DeleteFile(filePath) == 0) {
DbgPrint(L" error code = %d\n\n", GetLastError());
} else {
DbgPrint(L"success\n\n");
}
}
}
}
static NTSTATUS DOKAN_CALLBACK MirrorReadFile(LPCWSTR FileName, LPVOID Buffer,
DWORD BufferLength,
LPDWORD ReadLength,
LONGLONG Offset,
PDOKAN_FILE_INFO DokanFileInfo) {
WCHAR filePath[DOKAN_MAX_PATH];
HANDLE handle = (HANDLE)DokanFileInfo->Context;
ULONG offset = (ULONG)Offset;
BOOL opened = FALSE;
GetFilePath(filePath, DOKAN_MAX_PATH, FileName);
DbgPrint(L"ReadFile : %s\n", filePath);
if (!handle || handle == INVALID_HANDLE_VALUE) {
DbgPrint(L"\tinvalid handle, cleanuped?\n");
handle = CreateFile(filePath, GENERIC_READ, FILE_SHARE_READ, NULL,
OPEN_EXISTING, 0, NULL);
if (handle == INVALID_HANDLE_VALUE) {
DWORD error = GetLastError();
DbgPrint(L"\tCreateFile error : %d\n\n", error);
return DokanNtStatusFromWin32(error);
}
opened = TRUE;
}
LARGE_INTEGER distanceToMove;
distanceToMove.QuadPart = Offset;
if (!SetFilePointerEx(handle, distanceToMove, NULL, FILE_BEGIN)) {
DWORD error = GetLastError();
DbgPrint(L"\tseek error, offset = %d\n\n", offset);
if (opened)
CloseHandle(handle);
return DokanNtStatusFromWin32(error);
}
if (!ReadFile(handle, Buffer, BufferLength, ReadLength, NULL)) {
DWORD error = GetLastError();
DbgPrint(L"\tread error = %u, buffer length = %d, read length = %d\n\n",
error, BufferLength, *ReadLength);
if (opened)
CloseHandle(handle);
return DokanNtStatusFromWin32(error);
} else {
DbgPrint(L"\tByte to read: %d, Byte read %d, offset %d\n\n", BufferLength,
*ReadLength, offset);
}
if (opened)
CloseHandle(handle);
return STATUS_SUCCESS;
}
static NTSTATUS DOKAN_CALLBACK MirrorWriteFile(LPCWSTR FileName, LPCVOID Buffer,
DWORD NumberOfBytesToWrite,
LPDWORD NumberOfBytesWritten,
LONGLONG Offset,
PDOKAN_FILE_INFO DokanFileInfo) {
WCHAR filePath[DOKAN_MAX_PATH];
HANDLE handle = (HANDLE)DokanFileInfo->Context;
BOOL opened = FALSE;
GetFilePath(filePath, DOKAN_MAX_PATH, FileName);
DbgPrint(L"WriteFile : %s, offset %I64d, length %d\n", filePath, Offset,
NumberOfBytesToWrite);
// reopen the file
if (!handle || handle == INVALID_HANDLE_VALUE) {
DbgPrint(L"\tinvalid handle, cleanuped?\n");
handle = CreateFile(filePath, GENERIC_WRITE, FILE_SHARE_WRITE, NULL,
OPEN_EXISTING, 0, NULL);
if (handle == INVALID_HANDLE_VALUE) {
DWORD error = GetLastError();
DbgPrint(L"\tCreateFile error : %d\n\n", error);
return DokanNtStatusFromWin32(error);
}
opened = TRUE;
}
UINT64 fileSize = 0;
DWORD fileSizeLow = 0;
DWORD fileSizeHigh = 0;
fileSizeLow = GetFileSize(handle, &fileSizeHigh);
if (fileSizeLow == INVALID_FILE_SIZE) {
DWORD error = GetLastError();
DbgPrint(L"\tcan not get a file size error = %d\n", error);
if (opened)
CloseHandle(handle);
return DokanNtStatusFromWin32(error);
}
fileSize = ((UINT64)fileSizeHigh << 32) | fileSizeLow;
LARGE_INTEGER distanceToMove;
if (DokanFileInfo->WriteToEndOfFile) {
LARGE_INTEGER z;
z.QuadPart = 0;
if (!SetFilePointerEx(handle, z, NULL, FILE_END)) {
DWORD error = GetLastError();
DbgPrint(L"\tseek error, offset = EOF, error = %d\n", error);
if (opened)
CloseHandle(handle);
return DokanNtStatusFromWin32(error);
}
} else {
// Paging IO cannot write after allocate file size.
if (DokanFileInfo->PagingIo) {
if ((UINT64)Offset >= fileSize) {
*NumberOfBytesWritten = 0;
if (opened)
CloseHandle(handle);
return STATUS_SUCCESS;
}
if (((UINT64)Offset + NumberOfBytesToWrite) > fileSize) {
UINT64 bytes = fileSize - Offset;
if (bytes >> 32) {
NumberOfBytesToWrite = (DWORD)(bytes & 0xFFFFFFFFUL);
} else {
NumberOfBytesToWrite = (DWORD)bytes;
}
}
}
if ((UINT64)Offset > fileSize) {
// In the mirror sample helperZeroFileData is not necessary. NTFS will
// zero a hole.
// But if user's file system is different from NTFS( or other Windows's
// file systems ) then users will have to zero the hole themselves.
}
distanceToMove.QuadPart = Offset;
if (!SetFilePointerEx(handle, distanceToMove, NULL, FILE_BEGIN)) {
DWORD error = GetLastError();
DbgPrint(L"\tseek error, offset = %I64d, error = %d\n", Offset, error);
if (opened)
CloseHandle(handle);
return DokanNtStatusFromWin32(error);
}
}
if (!WriteFile(handle, Buffer, NumberOfBytesToWrite, NumberOfBytesWritten,
NULL)) {
DWORD error = GetLastError();
DbgPrint(L"\twrite error = %u, buffer length = %d, write length = %d\n",
error, NumberOfBytesToWrite, *NumberOfBytesWritten);
if (opened)
CloseHandle(handle);
return DokanNtStatusFromWin32(error);
} else {
DbgPrint(L"\twrite %d, offset %I64d\n\n", *NumberOfBytesWritten, Offset);
}
// close the file when it is reopened
if (opened)
CloseHandle(handle);
return STATUS_SUCCESS;
}
static NTSTATUS DOKAN_CALLBACK
MirrorFlushFileBuffers(LPCWSTR FileName, PDOKAN_FILE_INFO DokanFileInfo) {
WCHAR filePath[DOKAN_MAX_PATH];
HANDLE handle = (HANDLE)DokanFileInfo->Context;
GetFilePath(filePath, DOKAN_MAX_PATH, FileName);
DbgPrint(L"FlushFileBuffers : %s\n", filePath);
if (!handle || handle == INVALID_HANDLE_VALUE) {
DbgPrint(L"\tinvalid handle\n\n");
return STATUS_SUCCESS;
}
if (FlushFileBuffers(handle)) {
return STATUS_SUCCESS;
} else {
DWORD error = GetLastError();
DbgPrint(L"\tflush error code = %d\n", error);
return DokanNtStatusFromWin32(error);
}
}
static NTSTATUS DOKAN_CALLBACK MirrorGetFileInformation(
LPCWSTR FileName, LPBY_HANDLE_FILE_INFORMATION HandleFileInformation,
PDOKAN_FILE_INFO DokanFileInfo) {
WCHAR filePath[DOKAN_MAX_PATH];
HANDLE handle = (HANDLE)DokanFileInfo->Context;
BOOL opened = FALSE;
GetFilePath(filePath, DOKAN_MAX_PATH, FileName);
DbgPrint(L"GetFileInfo : %s\n", filePath);
if (!handle || handle == INVALID_HANDLE_VALUE) {
DbgPrint(L"\tinvalid handle, cleanuped?\n");
handle = CreateFile(filePath, GENERIC_READ, FILE_SHARE_READ, NULL,
OPEN_EXISTING, 0, NULL);
if (handle == INVALID_HANDLE_VALUE) {
DWORD error = GetLastError();
DbgPrint(L"\tCreateFile error : %d\n\n", error);
return DokanNtStatusFromWin32(error);
}
opened = TRUE;
}
if (!GetFileInformationByHandle(handle, HandleFileInformation)) {
DbgPrint(L"\terror code = %d\n", GetLastError());
// FileName is a root directory
// in this case, FindFirstFile can't get directory information
if (wcslen(FileName) == 1) {
DbgPrint(L" root dir\n");
HandleFileInformation->dwFileAttributes = GetFileAttributes(filePath);
} else {
WIN32_FIND_DATAW find;
ZeroMemory(&find, sizeof(WIN32_FIND_DATAW));
HANDLE findHandle = FindFirstFile(filePath, &find);
if (findHandle == INVALID_HANDLE_VALUE) {
DWORD error = GetLastError();
DbgPrint(L"\tFindFirstFile error code = %d\n\n", error);
if (opened)
CloseHandle(handle);
return DokanNtStatusFromWin32(error);
}
HandleFileInformation->dwFileAttributes = find.dwFileAttributes;
HandleFileInformation->ftCreationTime = find.ftCreationTime;
HandleFileInformation->ftLastAccessTime = find.ftLastAccessTime;
HandleFileInformation->ftLastWriteTime = find.ftLastWriteTime;
HandleFileInformation->nFileSizeHigh = find.nFileSizeHigh;
HandleFileInformation->nFileSizeLow = find.nFileSizeLow;
DbgPrint(L"\tFindFiles OK, file size = %d\n", find.nFileSizeLow);
FindClose(findHandle);
}
} else {
DbgPrint(L"\tGetFileInformationByHandle success, file size = %d\n",
HandleFileInformation->nFileSizeLow);
}
DbgPrint(L"FILE ATTRIBUTE = %d\n", HandleFileInformation->dwFileAttributes);
if (opened)
CloseHandle(handle);
return STATUS_SUCCESS;
}
static NTSTATUS DOKAN_CALLBACK
MirrorFindFiles(LPCWSTR FileName,
PFillFindData FillFindData, // function pointer
PDOKAN_FILE_INFO DokanFileInfo) {
WCHAR filePath[DOKAN_MAX_PATH];
size_t fileLen;
HANDLE hFind;
WIN32_FIND_DATAW findData;
DWORD error;
int count = 0;
GetFilePath(filePath, DOKAN_MAX_PATH, FileName);
DbgPrint(L"FindFiles : %s\n", filePath);
fileLen = wcslen(filePath);
if (filePath[fileLen - 1] != L'\\') {
filePath[fileLen++] = L'\\';
}
if (fileLen + 1 >= DOKAN_MAX_PATH)
return STATUS_BUFFER_OVERFLOW;
filePath[fileLen] = L'*';
filePath[fileLen + 1] = L'\0';
hFind = FindFirstFile(filePath, &findData);
if (hFind == INVALID_HANDLE_VALUE) {
error = GetLastError();
DbgPrint(L"\tinvalid file handle. Error is %u\n\n", error);
return DokanNtStatusFromWin32(error);
}
// Root folder does not have . and .. folder - we remove them
BOOLEAN rootFolder = (wcscmp(FileName, L"\\") == 0);
do {
if (!rootFolder || (wcscmp(findData.cFileName, L".") != 0 &&
wcscmp(findData.cFileName, L"..") != 0))
FillFindData(&findData, DokanFileInfo);
count++;
} while (FindNextFile(hFind, &findData) != 0);
error = GetLastError();
FindClose(hFind);
if (error != ERROR_NO_MORE_FILES) {
DbgPrint(L"\tFindNextFile error. Error is %u\n\n", error);
return DokanNtStatusFromWin32(error);
}
DbgPrint(L"\tFindFiles return %d entries in %s\n\n", count, filePath);
return STATUS_SUCCESS;
}
static NTSTATUS DOKAN_CALLBACK
MirrorDeleteFile(LPCWSTR FileName, PDOKAN_FILE_INFO DokanFileInfo) {
WCHAR filePath[DOKAN_MAX_PATH];
HANDLE handle = (HANDLE)DokanFileInfo->Context;
GetFilePath(filePath, DOKAN_MAX_PATH, FileName);
DbgPrint(L"DeleteFile %s - %d\n", filePath, DokanFileInfo->DeleteOnClose);
DWORD dwAttrib = GetFileAttributes(filePath);
if (dwAttrib != INVALID_FILE_ATTRIBUTES &&
(dwAttrib & FILE_ATTRIBUTE_DIRECTORY))
return STATUS_ACCESS_DENIED;
if (handle && handle != INVALID_HANDLE_VALUE) {
FILE_DISPOSITION_INFO fdi;
fdi.DeleteFile = DokanFileInfo->DeleteOnClose;
if (!SetFileInformationByHandle(handle, FileDispositionInfo, &fdi,
sizeof(FILE_DISPOSITION_INFO)))
return DokanNtStatusFromWin32(GetLastError());
}
return STATUS_SUCCESS;
}
static NTSTATUS DOKAN_CALLBACK
MirrorDeleteDirectory(LPCWSTR FileName, PDOKAN_FILE_INFO DokanFileInfo) {
WCHAR filePath[DOKAN_MAX_PATH];
// HANDLE handle = (HANDLE)DokanFileInfo->Context;
HANDLE hFind;
WIN32_FIND_DATAW findData;
size_t fileLen;
ZeroMemory(filePath, sizeof(filePath));
GetFilePath(filePath, DOKAN_MAX_PATH, FileName);
DbgPrint(L"DeleteDirectory %s - %d\n", filePath,
DokanFileInfo->DeleteOnClose);
if (!DokanFileInfo->DeleteOnClose)
//Dokan notify that the file is requested not to be deleted.
return STATUS_SUCCESS;
fileLen = wcslen(filePath);
if (filePath[fileLen - 1] != L'\\') {
filePath[fileLen++] = L'\\';
}
if (fileLen + 1 >= DOKAN_MAX_PATH)
return STATUS_BUFFER_OVERFLOW;
filePath[fileLen] = L'*';
filePath[fileLen + 1] = L'\0';
hFind = FindFirstFile(filePath, &findData);
if (hFind == INVALID_HANDLE_VALUE) {
DWORD error = GetLastError();
DbgPrint(L"\tDeleteDirectory error code = %d\n\n", error);
return DokanNtStatusFromWin32(error);
}
do {
if (wcscmp(findData.cFileName, L"..") != 0 &&
wcscmp(findData.cFileName, L".") != 0) {
FindClose(hFind);
DbgPrint(L"\tDirectory is not empty: %s\n", findData.cFileName);
return STATUS_DIRECTORY_NOT_EMPTY;
}
} while (FindNextFile(hFind, &findData) != 0);
DWORD error = GetLastError();
FindClose(hFind);
if (error != ERROR_NO_MORE_FILES) {
DbgPrint(L"\tDeleteDirectory error code = %d\n\n", error);
return DokanNtStatusFromWin32(error);
}
return STATUS_SUCCESS;
}
static NTSTATUS DOKAN_CALLBACK
MirrorMoveFile(LPCWSTR FileName, // existing file name
LPCWSTR NewFileName, BOOL ReplaceIfExisting,
PDOKAN_FILE_INFO DokanFileInfo) {
WCHAR filePath[DOKAN_MAX_PATH];
WCHAR newFilePath[DOKAN_MAX_PATH];
HANDLE handle;
DWORD bufferSize;
BOOL result;
size_t newFilePathLen;
PFILE_RENAME_INFO renameInfo = NULL;
GetFilePath(filePath, DOKAN_MAX_PATH, FileName);
if (wcslen(NewFileName) && NewFileName[0] != ':') {
GetFilePath(newFilePath, DOKAN_MAX_PATH, NewFileName);
} else {
// For a stream rename, FileRenameInfo expect the FileName param without the filename
// like :<stream name>:<stream type>
wcsncpy_s(newFilePath, DOKAN_MAX_PATH, NewFileName, wcslen(NewFileName));
}
DbgPrint(L"MoveFile %s -> %s\n\n", filePath, newFilePath);
handle = (HANDLE)DokanFileInfo->Context;
if (!handle || handle == INVALID_HANDLE_VALUE) {
DbgPrint(L"\tinvalid handle\n\n");
return STATUS_INVALID_HANDLE;
}
newFilePathLen = wcslen(newFilePath);
// the PFILE_RENAME_INFO struct has space for one WCHAR for the name at
// the end, so that
// accounts for the null terminator
bufferSize = (DWORD)(sizeof(FILE_RENAME_INFO) +
newFilePathLen * sizeof(newFilePath[0]));
renameInfo = (PFILE_RENAME_INFO)malloc(bufferSize);
if (!renameInfo) {
return STATUS_BUFFER_OVERFLOW;
}
ZeroMemory(renameInfo, bufferSize);
renameInfo->ReplaceIfExists =
ReplaceIfExisting
? TRUE
: FALSE; // some warning about converting BOOL to BOOLEAN