-
Notifications
You must be signed in to change notification settings - Fork 2.1k
/
Copy pathnsZipArchive.cpp
1236 lines (1057 loc) · 36.5 KB
/
nsZipArchive.cpp
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
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
/*
* This module implements a simple archive extractor for the PKZIP format.
*/
#define READTYPE int32_t
#include "zlib.h"
#include "nsISupportsUtils.h"
#include "mozilla/MmapFaultHandler.h"
#include "prio.h"
#include "mozilla/Attributes.h"
#include "mozilla/Logging.h"
#include "mozilla/MemUtils.h"
#include "mozilla/UniquePtrExtensions.h"
#include "mozilla/StaticMutex.h"
#include "mozilla/StaticPrefs_network.h"
#include "stdlib.h"
#include "nsDirectoryService.h"
#include "nsWildCard.h"
#include "nsXULAppAPI.h"
#include "nsZipArchive.h"
#include "nsString.h"
#include "prenv.h"
#if defined(XP_WIN)
# include <windows.h>
#endif
// For placement new used for arena allocations of zip file list
#include <new>
#define ZIP_ARENABLOCKSIZE (1 * 1024)
#ifdef XP_UNIX
# include <sys/mman.h>
# include <sys/types.h>
# include <sys/stat.h>
# include <limits.h>
# include <unistd.h>
#elif defined(XP_WIN)
# include <io.h>
#endif
#ifdef __SYMBIAN32__
# include <sys/syslimits.h>
#endif /*__SYMBIAN32__*/
#ifndef XP_UNIX /* we need some constants defined in limits.h and unistd.h */
# ifndef S_IFMT
# define S_IFMT 0170000
# endif
# ifndef S_IFLNK
# define S_IFLNK 0120000
# endif
# ifndef PATH_MAX
# define PATH_MAX 1024
# endif
#endif /* XP_UNIX */
#ifdef XP_WIN
# include "private/pprio.h" // To get PR_ImportFile
#endif
using namespace mozilla;
static LazyLogModule gZipLog("nsZipArchive");
#ifdef LOG
# undef LOG
#endif
#ifdef LOG_ENABLED
# undef LOG_ENABLED
#endif
#define LOG(args) MOZ_LOG(gZipLog, mozilla::LogLevel::Debug, args)
#define LOG_ENABLED() MOZ_LOG_TEST(gZipLog, mozilla::LogLevel::Debug)
static const uint32_t kMaxNameLength = PATH_MAX; /* Maximum name length */
// For synthetic zip entries. Date/time corresponds to 1980-01-01 00:00.
static const uint16_t kSyntheticTime = 0;
static const uint16_t kSyntheticDate = (1 + (1 << 5) + (0 << 9));
static uint16_t xtoint(const uint8_t* ii);
static uint32_t xtolong(const uint8_t* ll);
static uint32_t HashName(const char* aName, uint16_t nameLen);
class ZipArchiveLogger {
public:
void Init(const char* env) {
StaticMutexAutoLock lock(sLock);
// AddRef
MOZ_ASSERT(mRefCnt >= 0);
++mRefCnt;
if (!mFd) {
nsCOMPtr<nsIFile> logFile;
nsresult rv =
NS_NewLocalFile(NS_ConvertUTF8toUTF16(env), getter_AddRefs(logFile));
if (NS_FAILED(rv)) return;
// Create the log file and its parent directory (in case it doesn't exist)
rv = logFile->Create(nsIFile::NORMAL_FILE_TYPE, 0644);
if (NS_FAILED(rv)) return;
PRFileDesc* file;
#ifdef XP_WIN
// PR_APPEND is racy on Windows, so open a handle ourselves with flags
// that will work, and use PR_ImportFile to make it a PRFileDesc. This can
// go away when bug 840435 is fixed.
nsAutoString path;
logFile->GetPath(path);
if (path.IsEmpty()) return;
HANDLE handle =
CreateFileW(path.get(), FILE_APPEND_DATA, FILE_SHARE_WRITE, nullptr,
OPEN_ALWAYS, 0, nullptr);
if (handle == INVALID_HANDLE_VALUE) return;
file = PR_ImportFile((PROsfd)handle);
if (!file) return;
#else
rv = logFile->OpenNSPRFileDesc(
PR_WRONLY | PR_CREATE_FILE | PR_APPEND | PR_SYNC, 0644, &file);
if (NS_FAILED(rv)) return;
#endif
mFd = file;
}
}
void Write(const nsACString& zip, const char* entry) {
StaticMutexAutoLock lock(sLock);
if (mFd) {
nsCString buf(zip);
buf.Append(' ');
buf.Append(entry);
buf.Append('\n');
PR_Write(mFd, buf.get(), buf.Length());
}
}
void Release() {
StaticMutexAutoLock lock(sLock);
MOZ_ASSERT(mRefCnt > 0);
if ((0 == --mRefCnt) && mFd) {
PR_Close(mFd);
mFd = nullptr;
}
}
private:
static StaticMutex sLock;
int mRefCnt MOZ_GUARDED_BY(sLock);
PRFileDesc* mFd MOZ_GUARDED_BY(sLock);
};
StaticMutex ZipArchiveLogger::sLock;
static ZipArchiveLogger zipLog;
//***********************************************************
// For every inflation the following allocations are done:
// malloc(1 * 9520)
// malloc(32768 * 1)
//***********************************************************
nsresult gZlibInit(z_stream* zs) {
memset(zs, 0, sizeof(z_stream));
int zerr = inflateInit2(zs, -MAX_WBITS);
if (zerr != Z_OK) return NS_ERROR_OUT_OF_MEMORY;
return NS_OK;
}
nsZipHandle::nsZipHandle()
: mFileData(nullptr),
mLen(0),
mMap(nullptr),
mRefCnt(0),
mFileStart(nullptr),
mTotalLen(0) {}
NS_IMPL_ADDREF(nsZipHandle)
NS_IMPL_RELEASE(nsZipHandle)
nsresult nsZipHandle::Init(nsIFile* file, nsZipHandle** ret, PRFileDesc** aFd) {
mozilla::AutoFDClose fd;
int32_t flags = PR_RDONLY;
#if defined(XP_WIN)
flags |= nsIFile::OS_READAHEAD;
#endif
LOG(("ZipHandle::Init %s", file->HumanReadablePath().get()));
nsresult rv = file->OpenNSPRFileDesc(flags, 0000, getter_Transfers(fd));
if (NS_FAILED(rv)) return rv;
int64_t size = PR_Available64(fd.get());
if (size >= INT32_MAX) return NS_ERROR_FILE_TOO_BIG;
PRFileMap* map = PR_CreateFileMap(fd.get(), size, PR_PROT_READONLY);
if (!map) return NS_ERROR_FAILURE;
uint8_t* buf = (uint8_t*)PR_MemMap(map, 0, (uint32_t)size);
// Bug 525755: PR_MemMap fails when fd points at something other than a normal
// file.
if (!buf) {
PR_CloseFileMap(map);
return NS_ERROR_FAILURE;
}
RefPtr<nsZipHandle> handle = new nsZipHandle();
if (!handle) {
PR_MemUnmap(buf, (uint32_t)size);
PR_CloseFileMap(map);
return NS_ERROR_OUT_OF_MEMORY;
}
#if defined(XP_WIN)
if (aFd) {
*aFd = fd.release();
}
#else
handle->mNSPRFileDesc = std::move(fd);
#endif
handle->mFile.Init(file);
handle->mTotalLen = (uint32_t)size;
handle->mFileStart = buf;
rv = handle->findDataStart();
if (NS_FAILED(rv)) {
PR_MemUnmap(buf, (uint32_t)size);
handle->mFileStart = nullptr;
PR_CloseFileMap(map);
return rv;
}
handle->mMap = map;
handle.forget(ret);
return NS_OK;
}
nsresult nsZipHandle::Init(nsZipArchive* zip, const nsACString& entry,
nsZipHandle** ret) {
RefPtr<nsZipHandle> handle = new nsZipHandle();
if (!handle) return NS_ERROR_OUT_OF_MEMORY;
LOG(("ZipHandle::Init entry %s", PromiseFlatCString(entry).get()));
nsZipItem* item = zip->GetItem(entry);
if (item && item->Compression() == DEFLATED &&
StaticPrefs::network_jar_max_entry_size()) {
if (item->RealSize() > StaticPrefs::network_jar_max_entry_size()) {
return NS_ERROR_OUT_OF_MEMORY;
}
}
handle->mBuf = MakeUnique<nsZipItemPtr<uint8_t>>(zip, entry);
if (!handle->mBuf) return NS_ERROR_OUT_OF_MEMORY;
if (!handle->mBuf->Buffer()) return NS_ERROR_UNEXPECTED;
handle->mMap = nullptr;
handle->mFile.Init(zip, entry);
handle->mTotalLen = handle->mBuf->Length();
handle->mFileStart = handle->mBuf->Buffer();
nsresult rv = handle->findDataStart();
if (NS_FAILED(rv)) {
return rv;
}
handle.forget(ret);
return NS_OK;
}
nsresult nsZipHandle::Init(const uint8_t* aData, uint32_t aLen,
nsZipHandle** aRet) {
RefPtr<nsZipHandle> handle = new nsZipHandle();
handle->mFileStart = aData;
handle->mTotalLen = aLen;
nsresult rv = handle->findDataStart();
if (NS_FAILED(rv)) {
return rv;
}
handle.forget(aRet);
return NS_OK;
}
// This function finds the start of the ZIP data. If the file is a regular ZIP,
// this is just the start of the file. If the file is a CRX file, the start of
// the data is after the CRX header.
//
// CRX header reference, version 2:
// Header requires little-endian byte ordering with 4-byte alignment.
// 32 bits : magicNumber - Defined as a |char m[] = "Cr24"|.
// Equivilant to |uint32_t m = 0x34327243|.
// 32 bits : version - Unsigned integer representing the CRX file
// format version. Currently equal to 2.
// 32 bits : pubKeyLength - Unsigned integer representing the length
// of the public key in bytes.
// 32 bits : sigLength - Unsigned integer representing the length
// of the signature in bytes.
// pubKeyLength : publicKey - Contents of the author's public key.
// sigLength : signature - Signature of the ZIP content.
// Signature is created using the RSA
// algorithm with the SHA-1 hash function.
//
// CRX header reference, version 3:
// Header requires little-endian byte ordering with 4-byte alignment.
// 32 bits : magicNumber - Defined as a |char m[] = "Cr24"|.
// Equivilant to |uint32_t m = 0x34327243|.
// 32 bits : version - Unsigned integer representing the CRX file
// format version. Currently equal to 3.
// 32 bits : headerLength - Unsigned integer representing the length
// of the CRX header in bytes.
// headerLength : header - CRXv3 header.
nsresult nsZipHandle::findDataStart() {
// In the CRX header, integers are 32 bits. Our pointer to the file is of
// type |uint8_t|, which is guaranteed to be 8 bits.
const uint32_t CRXIntSize = 4;
MMAP_FAULT_HANDLER_BEGIN_HANDLE(this)
if (mTotalLen > CRXIntSize * 4 && xtolong(mFileStart) == kCRXMagic) {
const uint8_t* headerData = mFileStart;
headerData += CRXIntSize; // Skip magic number
uint32_t version = xtolong(headerData);
headerData += CRXIntSize; // Skip version
uint32_t headerSize = CRXIntSize * 2;
if (version == 3) {
uint32_t subHeaderSize = xtolong(headerData);
headerSize += CRXIntSize + subHeaderSize;
} else if (version < 3) {
uint32_t pubKeyLength = xtolong(headerData);
headerData += CRXIntSize;
uint32_t sigLength = xtolong(headerData);
headerSize += CRXIntSize * 2 + pubKeyLength + sigLength;
} else {
return NS_ERROR_FILE_CORRUPTED;
}
if (mTotalLen > headerSize) {
mLen = mTotalLen - headerSize;
mFileData = mFileStart + headerSize;
return NS_OK;
}
return NS_ERROR_FILE_CORRUPTED;
}
mLen = mTotalLen;
mFileData = mFileStart;
MMAP_FAULT_HANDLER_CATCH(NS_ERROR_FAILURE)
return NS_OK;
}
int64_t nsZipHandle::SizeOfMapping() { return mTotalLen; }
nsresult nsZipHandle::GetNSPRFileDesc(PRFileDesc** aNSPRFileDesc) {
if (!aNSPRFileDesc) {
return NS_ERROR_ILLEGAL_VALUE;
}
*aNSPRFileDesc = mNSPRFileDesc.get();
if (!mNSPRFileDesc) {
return NS_ERROR_NOT_AVAILABLE;
}
return NS_OK;
}
nsZipHandle::~nsZipHandle() {
if (mMap) {
PR_MemUnmap((void*)mFileStart, mTotalLen);
PR_CloseFileMap(mMap);
}
mFileStart = nullptr;
mFileData = nullptr;
mMap = nullptr;
mBuf = nullptr;
}
//***********************************************************
// nsZipArchive -- public methods
//***********************************************************
//---------------------------------------------
// nsZipArchive::OpenArchive
//---------------------------------------------
/* static */
already_AddRefed<nsZipArchive> nsZipArchive::OpenArchive(
nsZipHandle* aZipHandle, PRFileDesc* aFd) {
nsresult rv;
RefPtr<nsZipArchive> self(new nsZipArchive(aZipHandle, aFd, rv));
LOG(("ZipHandle::OpenArchive[%p]", self.get()));
if (NS_FAILED(rv)) {
self = nullptr;
}
return self.forget();
}
/* static */
already_AddRefed<nsZipArchive> nsZipArchive::OpenArchive(nsIFile* aFile) {
RefPtr<nsZipHandle> handle;
#if defined(XP_WIN)
mozilla::AutoFDClose fd;
nsresult rv =
nsZipHandle::Init(aFile, getter_AddRefs(handle), getter_Transfers(fd));
#else
nsresult rv = nsZipHandle::Init(aFile, getter_AddRefs(handle));
#endif
if (NS_FAILED(rv)) return nullptr;
#if defined(XP_WIN)
return OpenArchive(handle, fd.get());
#else
return OpenArchive(handle);
#endif
}
//---------------------------------------------
// nsZipArchive::Test
//---------------------------------------------
nsresult nsZipArchive::Test(const nsACString& aEntryName) {
nsZipItem* currItem;
if (aEntryName.Length()) // only test specified item
{
currItem = GetItem(aEntryName);
if (!currItem) return NS_ERROR_FILE_NOT_FOUND;
//-- don't test (synthetic) directory items
if (currItem->IsDirectory()) return NS_OK;
return ExtractFile(currItem, 0, 0);
}
// test all items in archive
for (auto* item : mFiles) {
for (currItem = item; currItem; currItem = currItem->next) {
//-- don't test (synthetic) directory items
if (currItem->IsDirectory()) continue;
nsresult rv = ExtractFile(currItem, 0, 0);
if (rv != NS_OK) return rv;
}
}
return NS_OK;
}
//---------------------------------------------
// nsZipArchive::GetItem
//---------------------------------------------
nsZipItem* nsZipArchive::GetItem(const nsACString& aEntryName) {
MutexAutoLock lock(mLock);
LOG(("ZipHandle::GetItem[%p] %s", this,
PromiseFlatCString(aEntryName).get()));
if (aEntryName.Length()) {
uint32_t len = aEntryName.Length();
//-- If the request is for a directory, make sure that synthetic entries
//-- are created for the directories without their own entry.
if (!mBuiltSynthetics) {
if ((len > 0) && (aEntryName[len - 1] == '/')) {
if (BuildSynthetics() != NS_OK) return 0;
}
}
MMAP_FAULT_HANDLER_BEGIN_HANDLE(mFd)
nsZipItem* item = mFiles[HashName(aEntryName.BeginReading(), len)];
while (item) {
if ((len == item->nameLength) &&
(!memcmp(aEntryName.BeginReading(), item->Name(), len))) {
// Successful GetItem() is a good indicator that the file is about to be
// read
if (mUseZipLog && mURI.Length()) {
zipLog.Write(mURI, aEntryName.BeginReading());
}
return item; //-- found it
}
item = item->next;
}
MMAP_FAULT_HANDLER_CATCH(nullptr)
}
return nullptr;
}
//---------------------------------------------
// nsZipArchive::ExtractFile
// This extracts the item to the filehandle provided.
// If 'aFd' is null, it only tests the extraction.
// On extraction error(s) it removes the file.
//---------------------------------------------
nsresult nsZipArchive::ExtractFile(nsZipItem* item, nsIFile* outFile,
PRFileDesc* aFd) {
MutexAutoLock lock(mLock);
LOG(("ZipHandle::ExtractFile[%p]", this));
if (!item) return NS_ERROR_ILLEGAL_VALUE;
if (!mFd) return NS_ERROR_FAILURE;
// Directory extraction is handled in nsJAR::Extract,
// so the item to be extracted should never be a directory
MOZ_ASSERT(!item->IsDirectory());
Bytef outbuf[ZIP_BUFLEN];
nsZipCursor cursor(item, this, outbuf, ZIP_BUFLEN, true);
nsresult rv = NS_OK;
while (true) {
uint32_t count = 0;
uint8_t* buf = cursor.Read(&count);
if (!buf) {
rv = NS_ERROR_FILE_CORRUPTED;
break;
}
if (count == 0) {
break;
}
if (aFd && PR_Write(aFd, buf, count) < (READTYPE)count) {
rv = NS_ERROR_FILE_NO_DEVICE_SPACE;
break;
}
}
//-- delete the file on errors
if (aFd) {
PR_Close(aFd);
if (NS_FAILED(rv) && outFile) {
outFile->Remove(false);
}
}
return rv;
}
//---------------------------------------------
// nsZipArchive::FindInit
//---------------------------------------------
nsresult nsZipArchive::FindInit(const char* aPattern, nsZipFind** aFind) {
if (!aFind) return NS_ERROR_ILLEGAL_VALUE;
MutexAutoLock lock(mLock);
LOG(("ZipHandle::FindInit[%p]", this));
// null out param in case an error happens
*aFind = nullptr;
bool regExp = false;
char* pattern = 0;
// Create synthetic directory entries on demand
nsresult rv = BuildSynthetics();
if (rv != NS_OK) return rv;
// validate the pattern
if (aPattern) {
switch (NS_WildCardValid((char*)aPattern)) {
case INVALID_SXP:
return NS_ERROR_ILLEGAL_VALUE;
case NON_SXP:
regExp = false;
break;
case VALID_SXP:
regExp = true;
break;
default:
// undocumented return value from RegExpValid!
MOZ_ASSERT(false);
return NS_ERROR_ILLEGAL_VALUE;
}
pattern = strdup(aPattern);
if (!pattern) return NS_ERROR_OUT_OF_MEMORY;
}
*aFind = new nsZipFind(this, pattern, regExp);
if (!*aFind) {
free(pattern);
return NS_ERROR_OUT_OF_MEMORY;
}
return NS_OK;
}
//---------------------------------------------
// nsZipFind::FindNext
//---------------------------------------------
nsresult nsZipFind::FindNext(const char** aResult, uint16_t* aNameLen) {
if (!mArchive || !aResult || !aNameLen) return NS_ERROR_ILLEGAL_VALUE;
MutexAutoLock lock(mArchive->mLock);
*aResult = 0;
*aNameLen = 0;
MMAP_FAULT_HANDLER_BEGIN_HANDLE(mArchive->GetFD())
// we start from last match, look for next
while (mSlot < ZIP_TABSIZE) {
// move to next in current chain, or move to new slot
mItem = mItem ? mItem->next : mArchive->mFiles[mSlot];
bool found = false;
if (!mItem)
++mSlot; // no more in this chain, move to next slot
else if (!mPattern)
found = true; // always match
else if (mRegExp) {
char buf[kMaxNameLength + 1];
memcpy(buf, mItem->Name(), mItem->nameLength);
buf[mItem->nameLength] = '\0';
found = (NS_WildCardMatch(buf, mPattern, false) == MATCH);
} else
found = ((mItem->nameLength == strlen(mPattern)) &&
(memcmp(mItem->Name(), mPattern, mItem->nameLength) == 0));
if (found) {
// Need also to return the name length, as it is NOT zero-terminatdd...
*aResult = mItem->Name();
*aNameLen = mItem->nameLength;
LOG(("ZipHandle::FindNext[%p] %s", this, *aResult));
return NS_OK;
}
}
MMAP_FAULT_HANDLER_CATCH(NS_ERROR_FAILURE)
LOG(("ZipHandle::FindNext[%p] not found %s", this, mPattern));
return NS_ERROR_FILE_NOT_FOUND;
}
//***********************************************************
// nsZipArchive -- private implementation
//***********************************************************
//---------------------------------------------
// nsZipArchive::CreateZipItem
//---------------------------------------------
nsZipItem* nsZipArchive::CreateZipItem() {
// Arena allocate the nsZipItem
return (nsZipItem*)mArena.Allocate(sizeof(nsZipItem), mozilla::fallible);
}
//---------------------------------------------
// nsZipArchive::BuildFileList
//---------------------------------------------
nsresult nsZipArchive::BuildFileList(PRFileDesc* aFd)
MOZ_NO_THREAD_SAFETY_ANALYSIS {
// We're only called from the constructor, but need to call
// CreateZipItem(), which touches locked data, and modify mFiles. Turn
// off thread-safety, which normally doesn't apply for constructors
// anyways
// Get archive size using end pos
const uint8_t* buf;
const uint8_t* startp = mFd->mFileData;
const uint8_t* endp = startp + mFd->mLen;
MMAP_FAULT_HANDLER_BEGIN_HANDLE(mFd)
uint32_t centralOffset = 4;
LOG(("ZipHandle::BuildFileList[%p]", this));
// Only perform readahead in the parent process. Children processes
// don't need readahead when the file has already been readahead by
// the parent process, and readahead only really happens for omni.ja,
// which is used in the parent process.
if (XRE_IsParentProcess() && mFd->mLen > ZIPCENTRAL_SIZE &&
xtolong(startp + centralOffset) == CENTRALSIG) {
// Success means optimized jar layout from bug 559961 is in effect
uint32_t readaheadLength = xtolong(startp);
mozilla::PrefetchMemory(const_cast<uint8_t*>(startp), readaheadLength);
} else {
for (buf = endp - ZIPEND_SIZE; buf > startp; buf--) {
if (xtolong(buf) == ENDSIG) {
centralOffset = xtolong(((ZipEnd*)buf)->offset_central_dir);
break;
}
}
}
if (!centralOffset) {
return NS_ERROR_FILE_CORRUPTED;
}
buf = startp + centralOffset;
// avoid overflow of startp + centralOffset.
if (buf < startp) {
return NS_ERROR_FILE_CORRUPTED;
}
//-- Read the central directory headers
uint32_t sig = 0;
while ((buf + int32_t(sizeof(uint32_t)) > buf) &&
(buf + int32_t(sizeof(uint32_t)) <= endp) &&
((sig = xtolong(buf)) == CENTRALSIG)) {
// Make sure there is enough data available.
if ((buf > endp) || (endp - buf < ZIPCENTRAL_SIZE)) {
return NS_ERROR_FILE_CORRUPTED;
}
// Read the fixed-size data.
ZipCentral* central = (ZipCentral*)buf;
uint16_t namelen = xtoint(central->filename_len);
uint16_t extralen = xtoint(central->extrafield_len);
uint16_t commentlen = xtoint(central->commentfield_len);
uint32_t diff = ZIPCENTRAL_SIZE + namelen + extralen + commentlen;
// Sanity check variable sizes and refuse to deal with
// anything too big: it's likely a corrupt archive.
if (namelen < 1 || namelen > kMaxNameLength) {
return NS_ERROR_FILE_CORRUPTED;
}
if (buf >= buf + diff || // No overflow
buf >= endp - diff) {
return NS_ERROR_FILE_CORRUPTED;
}
// Point to the next item at the top of loop
buf += diff;
nsZipItem* item = CreateZipItem();
if (!item) return NS_ERROR_OUT_OF_MEMORY;
item->central = central;
item->nameLength = namelen;
item->isSynthetic = false;
// Add item to file table
#ifdef DEBUG
nsDependentCSubstring name(item->Name(), namelen);
LOG((" %s", PromiseFlatCString(name).get()));
#endif
uint32_t hash = HashName(item->Name(), namelen);
item->next = mFiles[hash];
mFiles[hash] = item;
sig = 0;
} /* while reading central directory records */
if (sig != ENDSIG && sig != ENDSIG64) {
return NS_ERROR_FILE_CORRUPTED;
}
MMAP_FAULT_HANDLER_CATCH(NS_ERROR_FAILURE)
return NS_OK;
}
//---------------------------------------------
// nsZipArchive::BuildSynthetics
//---------------------------------------------
nsresult nsZipArchive::BuildSynthetics() {
mLock.AssertCurrentThreadOwns();
if (mBuiltSynthetics) return NS_OK;
mBuiltSynthetics = true;
MMAP_FAULT_HANDLER_BEGIN_HANDLE(mFd)
// Create synthetic entries for any missing directories.
// Do this when all ziptable has scanned to prevent double entries.
for (auto* item : mFiles) {
for (; item != nullptr; item = item->next) {
if (item->isSynthetic) continue;
//-- add entries for directories in the current item's path
//-- go from end to beginning, because then we can stop trying
//-- to create diritems if we find that the diritem we want to
//-- create already exists
//-- start just before the last char so as to not add the item
//-- twice if it's a directory
uint16_t namelen = item->nameLength;
MOZ_ASSERT(namelen > 0,
"Attempt to build synthetic for zero-length entry name!");
const char* name = item->Name();
for (uint16_t dirlen = namelen - 1; dirlen > 0; dirlen--) {
if (name[dirlen - 1] != '/') continue;
// The character before this is '/', so if this is also '/' then we
// have an empty path component. Skip it.
if (name[dirlen] == '/') continue;
// Is the directory already in the file table?
uint32_t hash = HashName(item->Name(), dirlen);
bool found = false;
for (nsZipItem* zi = mFiles[hash]; zi != nullptr; zi = zi->next) {
if ((dirlen == zi->nameLength) &&
(0 == memcmp(item->Name(), zi->Name(), dirlen))) {
// we've already added this dir and all its parents
found = true;
break;
}
}
// if the directory was found, break out of the directory
// creation loop now that we know all implicit directories
// are there -- otherwise, start creating the zip item
if (found) break;
nsZipItem* diritem = CreateZipItem();
if (!diritem) return NS_ERROR_OUT_OF_MEMORY;
// Point to the central record of the original item for the name part.
diritem->central = item->central;
diritem->nameLength = dirlen;
diritem->isSynthetic = true;
// add diritem to the file table
diritem->next = mFiles[hash];
mFiles[hash] = diritem;
} /* end processing of dirs in item's name */
}
}
MMAP_FAULT_HANDLER_CATCH(NS_ERROR_FAILURE)
return NS_OK;
}
//---------------------------------------------
// nsZipArchive::GetFD
//---------------------------------------------
nsZipHandle* nsZipArchive::GetFD() const { return mFd.get(); }
//---------------------------------------------
// nsZipArchive::GetDataOffset
// Returns 0 on an error; 0 is not a valid result for any success case
//---------------------------------------------
uint32_t nsZipArchive::GetDataOffset(nsZipItem* aItem) {
MOZ_ASSERT(aItem);
MOZ_DIAGNOSTIC_ASSERT(mFd);
uint32_t offset;
MMAP_FAULT_HANDLER_BEGIN_HANDLE(mFd)
//-- read local header to get variable length values and calculate
//-- the real data offset
uint32_t len = mFd->mLen;
MOZ_DIAGNOSTIC_ASSERT(len <= UINT32_MAX, "mLen > 2GB");
const uint8_t* data = mFd->mFileData;
offset = aItem->LocalOffset();
if (len < ZIPLOCAL_SIZE || offset > len - ZIPLOCAL_SIZE) {
return 0;
}
// Check there's enough space for the signature
if (offset > mFd->mLen) {
NS_WARNING("Corrupt local offset in JAR file");
return 0;
}
// -- check signature before using the structure, in case the zip file is
// corrupt
ZipLocal* Local = (ZipLocal*)(data + offset);
if ((xtolong(Local->signature) != LOCALSIG)) return 0;
//-- NOTE: extralen is different in central header and local header
//-- for archives created using the Unix "zip" utility. To set
//-- the offset accurately we need the _local_ extralen.
offset += ZIPLOCAL_SIZE + xtoint(Local->filename_len) +
xtoint(Local->extrafield_len);
// Check data points inside the file.
if (offset > mFd->mLen) {
NS_WARNING("Corrupt data offset in JAR file");
return 0;
}
MMAP_FAULT_HANDLER_CATCH(0)
// can't be 0
return offset;
}
//---------------------------------------------
// nsZipArchive::GetData
//---------------------------------------------
const uint8_t* nsZipArchive::GetData(nsZipItem* aItem) {
MOZ_DIAGNOSTIC_ASSERT(aItem);
if (!aItem) {
return nullptr;
}
uint32_t offset = GetDataOffset(aItem);
MMAP_FAULT_HANDLER_BEGIN_HANDLE(mFd)
// -- check if there is enough source data in the file
if (!offset || mFd->mLen < aItem->Size() ||
offset > mFd->mLen - aItem->Size() ||
(aItem->Compression() == STORED && aItem->Size() != aItem->RealSize())) {
return nullptr;
}
MMAP_FAULT_HANDLER_CATCH(nullptr)
return mFd->mFileData + offset;
}
//---------------------------------------------
// nsZipArchive::SizeOfMapping
//---------------------------------------------
int64_t nsZipArchive::SizeOfMapping() { return mFd ? mFd->SizeOfMapping() : 0; }
//------------------------------------------
// nsZipArchive constructor and destructor
//------------------------------------------
nsZipArchive::nsZipArchive(nsZipHandle* aZipHandle, PRFileDesc* aFd,
nsresult& aRv)
: mRefCnt(0), mFd(aZipHandle), mUseZipLog(false), mBuiltSynthetics(false) {
// initialize the table to nullptr
memset(mFiles, 0, sizeof(mFiles));
MOZ_DIAGNOSTIC_ASSERT(aZipHandle);
//-- get table of contents for archive
aRv = BuildFileList(aFd);
if (NS_FAILED(aRv)) {
return; // whomever created us must destroy us in this case
}
if (aZipHandle->mFile && XRE_IsParentProcess()) {
static char* env = PR_GetEnv("MOZ_JAR_LOG_FILE");
if (env) {
mUseZipLog = true;
zipLog.Init(env);
// We only log accesses in jar/zip archives within the NS_GRE_DIR
// and/or the APK on Android. For the former, we log the archive path
// relative to NS_GRE_DIR, and for the latter, the nested-archive
// path within the APK. This makes the path match the path of the
// archives relative to the packaged dist/$APP_NAME directory in a
// build.
if (aZipHandle->mFile.IsZip()) {
// Nested archive, likely omni.ja in APK.
aZipHandle->mFile.GetPath(mURI);
} else if (nsDirectoryService::gService) {
// We can reach here through the initialization of Omnijar from
// XRE_InitCommandLine, which happens before the directory service
// is initialized. When that happens, it means the opened archive is
// the APK, and we don't care to log that one, so we just skip
// when the directory service is not initialized.
nsCOMPtr<nsIFile> dir = aZipHandle->mFile.GetBaseFile();
nsCOMPtr<nsIFile> gre_dir;
nsAutoCString path;
if (NS_SUCCEEDED(nsDirectoryService::gService->Get(
NS_GRE_DIR, NS_GET_IID(nsIFile), getter_AddRefs(gre_dir)))) {
nsAutoCString leaf;
nsCOMPtr<nsIFile> parent;
while (NS_SUCCEEDED(dir->GetNativeLeafName(leaf)) &&
NS_SUCCEEDED(dir->GetParent(getter_AddRefs(parent)))) {
if (!parent) {
break;
}
dir = parent;
if (path.Length()) {
path.Insert('/', 0);
}
path.Insert(leaf, 0);
bool equals;
if (NS_SUCCEEDED(dir->Equals(gre_dir, &equals)) && equals) {
mURI.Assign(path);
break;
}
}
}
}
}
}
}
NS_IMPL_ADDREF(nsZipArchive)
NS_IMPL_RELEASE(nsZipArchive)
nsZipArchive::~nsZipArchive() {
LOG(("Closing nsZipArchive[%p]", this));
if (mUseZipLog) {
zipLog.Release();
}
}
//------------------------------------------
// nsZipFind constructor and destructor
//------------------------------------------
nsZipFind::nsZipFind(nsZipArchive* aZip, char* aPattern, bool aRegExp)
: mArchive(aZip),
mPattern(aPattern),
mItem(nullptr),
mSlot(0),
mRegExp(aRegExp) {
MOZ_COUNT_CTOR(nsZipFind);
}
nsZipFind::~nsZipFind() {
free(mPattern);
MOZ_COUNT_DTOR(nsZipFind);
}
//------------------------------------------
// helper functions
//------------------------------------------
/*
* HashName
*
* returns a hash key for the entry name
*/
MOZ_NO_SANITIZE_UNSIGNED_OVERFLOW
static uint32_t HashName(const char* aName, uint16_t len) {
MOZ_ASSERT(aName != 0);
const uint8_t* p = (const uint8_t*)aName;
const uint8_t* endp = p + len;
uint32_t val = 0;
while (p != endp) {
val = val * 37 + *p++;
}
return (val % ZIP_TABSIZE);
}