2 * Copyright (c) 2011 Michihiro NAKAJIMA
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR
15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
17 * IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT,
18 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
19 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
20 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
21 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 #include "archive_platform.h"
27 __FBSDID("$FreeBSD$");
46 #include "archive_entry.h"
47 #include "archive_entry_locale.h"
48 #include "archive_ppmd7_private.h"
49 #include "archive_private.h"
50 #include "archive_read_private.h"
51 #include "archive_endian.h"
54 #include "archive_crc32.h"
57 #define _7ZIP_SIGNATURE "7z\xBC\xAF\x27\x1C"
58 #define SFX_MIN_ADDR 0x27000
59 #define SFX_MAX_ADDR 0x60000
66 #define _7Z_LZMA 0x030101
67 #define _7Z_LZMA2 0x21
68 #define _7Z_DEFLATE 0x040108
69 #define _7Z_BZ2 0x040202
70 #define _7Z_PPMD 0x030401
71 #define _7Z_DELTA 0x03
72 #define _7Z_CRYPTO_MAIN_ZIP 0x06F10101 /* Main Zip crypto algo */
73 #define _7Z_CRYPTO_RAR_29 0x06F10303 /* Rar29 AES-128 + (modified SHA-1) */
74 #define _7Z_CRYPTO_AES_256_SHA_256 0x06F10701 /* AES-256 + SHA-256 */
77 #define _7Z_X86 0x03030103
78 #define _7Z_X86_BCJ2 0x0303011B
79 #define _7Z_POWERPC 0x03030205
80 #define _7Z_IA64 0x03030401
81 #define _7Z_ARM 0x03030501
82 #define _7Z_ARMTHUMB 0x03030701
83 #define _7Z_SPARC 0x03030805
86 * 7-Zip header property IDs.
90 #define kArchiveProperties 0x02
91 #define kAdditionalStreamsInfo 0x03
92 #define kMainStreamsInfo 0x04
93 #define kFilesInfo 0x05
94 #define kPackInfo 0x06
95 #define kUnPackInfo 0x07
96 #define kSubStreamsInfo 0x08
100 #define kCodersUnPackSize 0x0C
101 #define kNumUnPackStream 0x0D
102 #define kEmptyStream 0x0E
103 #define kEmptyFile 0x0F
109 #define kAttributes 0x15
110 #define kEncodedHeader 0x17
114 unsigned char *defineds;
123 uint64_t numInStreams;
124 uint64_t numOutStreams;
125 uint64_t propertiesSize;
126 unsigned char *properties;
128 uint64_t numBindPairs;
133 uint64_t numPackedStreams;
134 uint64_t *packedStreams;
135 uint64_t numInStreams;
136 uint64_t numOutStreams;
137 uint64_t *unPackSize;
138 unsigned char digest_defined;
140 uint64_t numUnpackStreams;
142 /* Unoperated bytes. */
143 uint64_t skipped_bytes;
146 struct _7z_coders_info {
148 struct _7z_folder *folders;
149 uint64_t dataStreamIndex;
152 struct _7z_pack_info {
154 uint64_t numPackStreams;
156 struct _7z_digests digest;
157 /* Calculated from pos and numPackStreams. */
161 struct _7z_substream_info {
162 size_t unpack_streams;
163 uint64_t *unpackSizes;
164 unsigned char *digestsDefined;
168 struct _7z_stream_info {
169 struct _7z_pack_info pi;
170 struct _7z_coders_info ci;
171 struct _7z_substream_info ss;
174 struct _7z_header_info {
177 unsigned char *emptyStreamBools;
178 unsigned char *emptyFileBools;
179 unsigned char *antiBools;
180 unsigned char *attrBools;
185 unsigned char *utf16name;
186 #if defined(_WIN32) && !defined(__CYGWIN__) && defined(_DEBUG)
187 const wchar_t *wname;
189 uint32_t folderIndex;
192 #define MTIME_IS_SET (1<<0)
193 #define ATIME_IS_SET (1<<1)
194 #define CTIME_IS_SET (1<<2)
195 #define CRC32_IS_SET (1<<3)
196 #define HAS_STREAM (1<<4)
209 /* Structural information about the archive. */
210 struct _7z_stream_info si;
212 int header_is_being_read;
213 int header_is_encoded;
214 uint64_t header_bytes_remaining;
215 unsigned long header_crc32;
216 /* Header offset to check that reading points of the file contents
217 * will not exceed the header. */
218 uint64_t header_offset;
219 /* Base offset of the archive file for a seek in case reading SFX. */
222 /* List of entries */
223 size_t entries_remaining;
225 struct _7zip_entry *entries;
226 struct _7zip_entry *entry;
227 unsigned char *entry_names;
229 /* entry_bytes_remaining is the number of bytes we expect. */
230 int64_t entry_offset;
231 uint64_t entry_bytes_remaining;
233 /* Running CRC32 of the decompressed data */
234 unsigned long entry_crc32;
236 /* Flags to mark progress of decompression. */
239 /* Uncompressed buffer control. */
240 #define UBUFF_SIZE (64 * 1024)
241 unsigned char *uncompressed_buffer;
242 unsigned char *uncompressed_buffer_pointer;
243 size_t uncompressed_buffer_size;
244 size_t uncompressed_buffer_bytes_remaining;
246 /* Offset of the compressed data. */
247 int64_t stream_offset;
250 * Decompressing control data.
252 unsigned folder_index;
253 uint64_t folder_outbytes_remaining;
254 unsigned pack_stream_index;
255 unsigned pack_stream_remaining;
256 uint64_t pack_stream_inbytes_remaining;
257 size_t pack_stream_bytes_unconsumed;
259 /* The codec information of a folder. */
261 unsigned long codec2;
264 * Decompressor controllers.
266 /* Decoding LZMA1 and LZMA2 data. */
268 lzma_stream lzstream;
271 /* Decoding bzip2 data. */
272 #if defined(HAVE_BZLIB_H) && defined(BZ_CONFIG_ERROR)
276 /* Decoding deflate data. */
281 /* Decoding PPMd data. */
283 CPpmd7 ppmd7_context;
284 CPpmd7z_RangeDec range_dec;
287 const unsigned char *next_in;
290 unsigned char *next_out;
297 /* Decoding BCJ and BCJ2 data. */
300 unsigned char odd_bcj[4];
301 /* Decoding BCJ data. */
303 uint32_t bcj_prevMask;
306 /* Decoding BCJ2 data. */
307 size_t main_stream_bytes_remaining;
308 unsigned char *sub_stream_buff[3];
309 size_t sub_stream_size[3];
310 size_t sub_stream_bytes_remaining[3];
311 unsigned char *tmp_stream_buff;
312 size_t tmp_stream_buff_size;
313 size_t tmp_stream_bytes_avail;
314 size_t tmp_stream_bytes_remaining;
316 #define CProb uint32_t
318 #define CProb uint16_t
320 CProb bcj2_p[256 + 2];
321 uint8_t bcj2_prevByte;
324 uint64_t bcj2_outPos;
326 /* Filename character-set conversion data. */
327 struct archive_string_conv *sconv;
329 char format_name[64];
331 /* Custom value that is non-zero if this archive contains encrypted entries. */
332 int has_encrypted_entries;
335 /* Maximum entry size. This limitation prevents reading intentional
336 * corrupted 7-zip files on assuming there are not so many entries in
338 #define UMAX_ENTRY ARCHIVE_LITERAL_ULL(100000000)
340 static int archive_read_format_7zip_has_encrypted_entries(struct archive_read *);
341 static int archive_read_support_format_7zip_capabilities(struct archive_read *a);
342 static int archive_read_format_7zip_bid(struct archive_read *, int);
343 static int archive_read_format_7zip_cleanup(struct archive_read *);
344 static int archive_read_format_7zip_read_data(struct archive_read *,
345 const void **, size_t *, int64_t *);
346 static int archive_read_format_7zip_read_data_skip(struct archive_read *);
347 static int archive_read_format_7zip_read_header(struct archive_read *,
348 struct archive_entry *);
349 static int check_7zip_header_in_sfx(const char *);
350 static unsigned long decode_codec_id(const unsigned char *, size_t);
351 static int decode_encoded_header_info(struct archive_read *,
352 struct _7z_stream_info *);
353 static int decompress(struct archive_read *, struct _7zip *,
354 void *, size_t *, const void *, size_t *);
355 static ssize_t extract_pack_stream(struct archive_read *, size_t);
356 static void fileTimeToUtc(uint64_t, time_t *, long *);
357 static uint64_t folder_uncompressed_size(struct _7z_folder *);
358 static void free_CodersInfo(struct _7z_coders_info *);
359 static void free_Digest(struct _7z_digests *);
360 static void free_Folder(struct _7z_folder *);
361 static void free_Header(struct _7z_header_info *);
362 static void free_PackInfo(struct _7z_pack_info *);
363 static void free_StreamsInfo(struct _7z_stream_info *);
364 static void free_SubStreamsInfo(struct _7z_substream_info *);
365 static int free_decompression(struct archive_read *, struct _7zip *);
366 static ssize_t get_uncompressed_data(struct archive_read *, const void **,
368 static const unsigned char * header_bytes(struct archive_read *, size_t);
369 static int init_decompression(struct archive_read *, struct _7zip *,
370 const struct _7z_coder *, const struct _7z_coder *);
371 static int parse_7zip_uint64(struct archive_read *, uint64_t *);
372 static int read_Bools(struct archive_read *, unsigned char *, size_t);
373 static int read_CodersInfo(struct archive_read *,
374 struct _7z_coders_info *);
375 static int read_Digests(struct archive_read *, struct _7z_digests *,
377 static int read_Folder(struct archive_read *, struct _7z_folder *);
378 static int read_Header(struct archive_read *, struct _7z_header_info *,
380 static int read_PackInfo(struct archive_read *, struct _7z_pack_info *);
381 static int read_StreamsInfo(struct archive_read *,
382 struct _7z_stream_info *);
383 static int read_SubStreamsInfo(struct archive_read *,
384 struct _7z_substream_info *, struct _7z_folder *, size_t);
385 static int read_Times(struct archive_read *, struct _7z_header_info *,
387 static void read_consume(struct archive_read *);
388 static ssize_t read_stream(struct archive_read *, const void **, size_t,
390 static int seek_pack(struct archive_read *);
391 static int64_t skip_stream(struct archive_read *, size_t);
392 static int skip_sfx(struct archive_read *, ssize_t);
393 static int slurp_central_directory(struct archive_read *, struct _7zip *,
394 struct _7z_header_info *);
395 static int setup_decode_folder(struct archive_read *, struct _7z_folder *,
397 static void x86_Init(struct _7zip *);
398 static size_t x86_Convert(struct _7zip *, uint8_t *, size_t);
399 static ssize_t Bcj2_Decode(struct _7zip *, uint8_t *, size_t);
403 archive_read_support_format_7zip(struct archive *_a)
405 struct archive_read *a = (struct archive_read *)_a;
409 archive_check_magic(_a, ARCHIVE_READ_MAGIC,
410 ARCHIVE_STATE_NEW, "archive_read_support_format_7zip");
412 zip = calloc(1, sizeof(*zip));
414 archive_set_error(&a->archive, ENOMEM,
415 "Can't allocate 7zip data");
416 return (ARCHIVE_FATAL);
420 * Until enough data has been read, we cannot tell about
421 * any encrypted entries yet.
423 zip->has_encrypted_entries = ARCHIVE_READ_FORMAT_ENCRYPTION_DONT_KNOW;
426 r = __archive_read_register_format(a,
429 archive_read_format_7zip_bid,
431 archive_read_format_7zip_read_header,
432 archive_read_format_7zip_read_data,
433 archive_read_format_7zip_read_data_skip,
435 archive_read_format_7zip_cleanup,
436 archive_read_support_format_7zip_capabilities,
437 archive_read_format_7zip_has_encrypted_entries);
445 archive_read_support_format_7zip_capabilities(struct archive_read * a)
447 (void)a; /* UNUSED */
448 return (ARCHIVE_READ_FORMAT_CAPS_ENCRYPT_DATA |
449 ARCHIVE_READ_FORMAT_CAPS_ENCRYPT_METADATA);
454 archive_read_format_7zip_has_encrypted_entries(struct archive_read *_a)
456 if (_a && _a->format) {
457 struct _7zip * zip = (struct _7zip *)_a->format->data;
459 return zip->has_encrypted_entries;
462 return ARCHIVE_READ_FORMAT_ENCRYPTION_DONT_KNOW;
466 archive_read_format_7zip_bid(struct archive_read *a, int best_bid)
470 /* If someone has already bid more than 32, then avoid
471 trashing the look-ahead buffers with a seek. */
475 if ((p = __archive_read_ahead(a, 6, NULL)) == NULL)
478 /* If first six bytes are the 7-Zip signature,
479 * return the bid right now. */
480 if (memcmp(p, _7ZIP_SIGNATURE, 6) == 0)
484 * It may a 7-Zip SFX archive file. If first two bytes are
485 * 'M' and 'Z' available on Windows or first four bytes are
486 * "\x7F\x45LF" available on posix like system, seek the 7-Zip
487 * signature. Although we will perform a seek when reading
488 * a header, what we do not use __archive_read_seek() here is
489 * due to a bidding performance.
491 if ((p[0] == 'M' && p[1] == 'Z') || memcmp(p, "\x7F\x45LF", 4) == 0) {
492 ssize_t offset = SFX_MIN_ADDR;
493 ssize_t window = 4096;
495 while (offset + window <= (SFX_MAX_ADDR)) {
496 const char *buff = __archive_read_ahead(a,
497 offset + window, &bytes_avail);
499 /* Remaining bytes are less than window. */
506 while (p + 32 < buff + bytes_avail) {
507 int step = check_7zip_header_in_sfx(p);
519 check_7zip_header_in_sfx(const char *p)
521 switch ((unsigned char)p[5]) {
523 if (memcmp(p, _7ZIP_SIGNATURE, 6) != 0)
526 * Test the CRC because its extraction code has 7-Zip
527 * Magic Code, so we should do this in order not to
528 * make a mis-detection.
530 if (crc32(0, (const unsigned char *)p + 12, 20)
531 != archive_le32dec(p + 8))
533 /* Hit the header! */
535 case 0x37: return (5);
536 case 0x7A: return (4);
537 case 0xBC: return (3);
538 case 0xAF: return (2);
539 case 0x27: return (1);
545 skip_sfx(struct archive_read *a, ssize_t bytes_avail)
550 ssize_t bytes, window;
553 * If bytes_avail > SFX_MIN_ADDR we do not have to call
554 * __archive_read_seek() at this time since we have
555 * already had enough data.
557 if (bytes_avail > SFX_MIN_ADDR)
558 __archive_read_consume(a, SFX_MIN_ADDR);
559 else if (__archive_read_seek(a, SFX_MIN_ADDR, SEEK_SET) < 0)
560 return (ARCHIVE_FATAL);
564 while (offset + window <= SFX_MAX_ADDR - SFX_MIN_ADDR) {
565 h = __archive_read_ahead(a, window, &bytes);
567 /* Remaining bytes are less than window. */
574 /* This case might happen when window == 1. */
582 * Scan ahead until we find something that looks
583 * like the 7-Zip header.
586 int step = check_7zip_header_in_sfx(p);
589 (struct _7zip *)a->format->data;
590 skip = p - (const char *)h;
591 __archive_read_consume(a, skip);
592 zip->seek_base = SFX_MIN_ADDR + offset + skip;
597 skip = p - (const char *)h;
598 __archive_read_consume(a, skip);
604 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
605 "Couldn't find out 7-Zip header");
606 return (ARCHIVE_FATAL);
610 archive_read_format_7zip_read_header(struct archive_read *a,
611 struct archive_entry *entry)
613 struct _7zip *zip = (struct _7zip *)a->format->data;
614 struct _7zip_entry *zip_entry;
615 int r, ret = ARCHIVE_OK;
616 struct _7z_folder *folder = 0;
620 * It should be sufficient to call archive_read_next_header() for
621 * a reader to determine if an entry is encrypted or not. If the
622 * encryption of an entry is only detectable when calling
623 * archive_read_data(), so be it. We'll do the same check there
626 if (zip->has_encrypted_entries == ARCHIVE_READ_FORMAT_ENCRYPTION_DONT_KNOW) {
627 zip->has_encrypted_entries = 0;
630 a->archive.archive_format = ARCHIVE_FORMAT_7ZIP;
631 if (a->archive.archive_format_name == NULL)
632 a->archive.archive_format_name = "7-Zip";
634 if (zip->entries == NULL) {
635 struct _7z_header_info header;
637 memset(&header, 0, sizeof(header));
638 r = slurp_central_directory(a, zip, &header);
639 free_Header(&header);
642 zip->entries_remaining = (size_t)zip->numFiles;
643 zip->entry = zip->entries;
647 zip_entry = zip->entry;
649 if (zip->entries_remaining <= 0 || zip_entry == NULL)
651 --zip->entries_remaining;
653 zip->entry_offset = 0;
654 zip->end_of_entry = 0;
655 zip->entry_crc32 = crc32(0, NULL, 0);
657 /* Setup a string conversion for a filename. */
658 if (zip->sconv == NULL) {
659 zip->sconv = archive_string_conversion_from_charset(
660 &a->archive, "UTF-16LE", 1);
661 if (zip->sconv == NULL)
662 return (ARCHIVE_FATAL);
665 /* Figure out if the entry is encrypted by looking at the folder
666 that is associated to the current 7zip entry. If the folder
667 has a coder with a _7Z_CRYPTO codec then the folder is encrypted.
668 Hence the entry must also be encrypted. */
669 if (zip_entry && zip_entry->folderIndex < zip->si.ci.numFolders) {
670 folder = &(zip->si.ci.folders[zip_entry->folderIndex]);
671 for (fidx=0; folder && fidx<folder->numCoders; fidx++) {
672 switch(folder->coders[fidx].codec) {
673 case _7Z_CRYPTO_MAIN_ZIP:
674 case _7Z_CRYPTO_RAR_29:
675 case _7Z_CRYPTO_AES_256_SHA_256: {
676 archive_entry_set_is_data_encrypted(entry, 1);
677 zip->has_encrypted_entries = 1;
684 /* Now that we've checked for encryption, if there were still no
685 * encrypted entries found we can say for sure that there are none.
687 if (zip->has_encrypted_entries == ARCHIVE_READ_FORMAT_ENCRYPTION_DONT_KNOW) {
688 zip->has_encrypted_entries = 0;
691 if (archive_entry_copy_pathname_l(entry,
692 (const char *)zip_entry->utf16name,
693 zip_entry->name_len, zip->sconv) != 0) {
694 if (errno == ENOMEM) {
695 archive_set_error(&a->archive, ENOMEM,
696 "Can't allocate memory for Pathname");
697 return (ARCHIVE_FATAL);
699 archive_set_error(&a->archive,
700 ARCHIVE_ERRNO_FILE_FORMAT,
701 "Pathname cannot be converted "
702 "from %s to current locale.",
703 archive_string_conversion_charset_name(zip->sconv));
707 /* Populate some additional entry fields: */
708 archive_entry_set_mode(entry, zip_entry->mode);
709 if (zip_entry->flg & MTIME_IS_SET)
710 archive_entry_set_mtime(entry, zip_entry->mtime,
711 zip_entry->mtime_ns);
712 if (zip_entry->flg & CTIME_IS_SET)
713 archive_entry_set_ctime(entry, zip_entry->ctime,
714 zip_entry->ctime_ns);
715 if (zip_entry->flg & ATIME_IS_SET)
716 archive_entry_set_atime(entry, zip_entry->atime,
717 zip_entry->atime_ns);
718 if (zip_entry->ssIndex != (uint32_t)-1) {
719 zip->entry_bytes_remaining =
720 zip->si.ss.unpackSizes[zip_entry->ssIndex];
721 archive_entry_set_size(entry, zip->entry_bytes_remaining);
723 zip->entry_bytes_remaining = 0;
724 archive_entry_set_size(entry, 0);
727 /* If there's no body, force read_data() to return EOF immediately. */
728 if (zip->entry_bytes_remaining < 1)
729 zip->end_of_entry = 1;
731 if ((zip_entry->mode & AE_IFMT) == AE_IFLNK) {
732 unsigned char *symname = NULL;
736 * Symbolic-name is recorded as its contents. We have to
737 * read the contents at this time.
739 while (zip->entry_bytes_remaining > 0) {
745 r = archive_read_format_7zip_read_data(a, &buff,
747 if (r < ARCHIVE_WARN) {
751 mem = realloc(symname, symsize + size + 1);
754 archive_set_error(&a->archive, ENOMEM,
755 "Can't allocate memory for Symname");
756 return (ARCHIVE_FATAL);
759 memcpy(symname+symsize, buff, size);
763 /* If there is no symname, handle it as a regular
765 zip_entry->mode &= ~AE_IFMT;
766 zip_entry->mode |= AE_IFREG;
767 archive_entry_set_mode(entry, zip_entry->mode);
769 symname[symsize] = '\0';
770 archive_entry_copy_symlink(entry,
771 (const char *)symname);
774 archive_entry_set_size(entry, 0);
777 /* Set up a more descriptive format name. */
778 sprintf(zip->format_name, "7-Zip");
779 a->archive.archive_format_name = zip->format_name;
785 archive_read_format_7zip_read_data(struct archive_read *a,
786 const void **buff, size_t *size, int64_t *offset)
790 int ret = ARCHIVE_OK;
792 zip = (struct _7zip *)(a->format->data);
794 if (zip->has_encrypted_entries == ARCHIVE_READ_FORMAT_ENCRYPTION_DONT_KNOW) {
795 zip->has_encrypted_entries = 0;
798 if (zip->pack_stream_bytes_unconsumed)
801 *offset = zip->entry_offset;
805 * If we hit end-of-entry last time, clean up and return
806 * ARCHIVE_EOF this time.
808 if (zip->end_of_entry)
809 return (ARCHIVE_EOF);
811 bytes = read_stream(a, buff,
812 (size_t)zip->entry_bytes_remaining, 0);
816 archive_set_error(&a->archive,
817 ARCHIVE_ERRNO_FILE_FORMAT,
818 "Truncated 7-Zip file body");
819 return (ARCHIVE_FATAL);
821 zip->entry_bytes_remaining -= bytes;
822 if (zip->entry_bytes_remaining == 0)
823 zip->end_of_entry = 1;
825 /* Update checksum */
826 if ((zip->entry->flg & CRC32_IS_SET) && bytes)
827 zip->entry_crc32 = crc32(zip->entry_crc32, *buff,
830 /* If we hit the end, swallow any end-of-data marker. */
831 if (zip->end_of_entry) {
832 /* Check computed CRC against file contents. */
833 if ((zip->entry->flg & CRC32_IS_SET) &&
834 zip->si.ss.digests[zip->entry->ssIndex] !=
836 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
837 "7-Zip bad CRC: 0x%lx should be 0x%lx",
838 (unsigned long)zip->entry_crc32,
839 (unsigned long)zip->si.ss.digests[
840 zip->entry->ssIndex]);
846 *offset = zip->entry_offset;
847 zip->entry_offset += bytes;
853 archive_read_format_7zip_read_data_skip(struct archive_read *a)
856 int64_t bytes_skipped;
858 zip = (struct _7zip *)(a->format->data);
860 if (zip->pack_stream_bytes_unconsumed)
863 /* If we've already read to end of data, we're done. */
864 if (zip->end_of_entry)
868 * If the length is at the beginning, we can skip the
869 * compressed data much more quickly.
871 bytes_skipped = skip_stream(a, (size_t)zip->entry_bytes_remaining);
872 if (bytes_skipped < 0)
873 return (ARCHIVE_FATAL);
874 zip->entry_bytes_remaining = 0;
876 /* This entry is finished and done. */
877 zip->end_of_entry = 1;
882 archive_read_format_7zip_cleanup(struct archive_read *a)
886 zip = (struct _7zip *)(a->format->data);
887 free_StreamsInfo(&(zip->si));
889 free(zip->entry_names);
890 free_decompression(a, zip);
891 free(zip->uncompressed_buffer);
892 free(zip->sub_stream_buff[0]);
893 free(zip->sub_stream_buff[1]);
894 free(zip->sub_stream_buff[2]);
895 free(zip->tmp_stream_buff);
897 (a->format->data) = NULL;
902 read_consume(struct archive_read *a)
904 struct _7zip *zip = (struct _7zip *)a->format->data;
906 if (zip->pack_stream_bytes_unconsumed) {
907 __archive_read_consume(a, zip->pack_stream_bytes_unconsumed);
908 zip->stream_offset += zip->pack_stream_bytes_unconsumed;
909 zip->pack_stream_bytes_unconsumed = 0;
916 * Set an error code and choose an error message for liblzma.
919 set_error(struct archive_read *a, int ret)
923 case LZMA_STREAM_END: /* Found end of stream. */
924 case LZMA_OK: /* Decompressor made some progress. */
927 archive_set_error(&a->archive, ENOMEM,
928 "Lzma library error: Cannot allocate memory");
930 case LZMA_MEMLIMIT_ERROR:
931 archive_set_error(&a->archive, ENOMEM,
932 "Lzma library error: Out of memory");
934 case LZMA_FORMAT_ERROR:
935 archive_set_error(&a->archive,
937 "Lzma library error: format not recognized");
939 case LZMA_OPTIONS_ERROR:
940 archive_set_error(&a->archive,
942 "Lzma library error: Invalid options");
944 case LZMA_DATA_ERROR:
945 archive_set_error(&a->archive,
947 "Lzma library error: Corrupted input data");
950 archive_set_error(&a->archive,
952 "Lzma library error: No progress is possible");
955 /* Return an error. */
956 archive_set_error(&a->archive,
958 "Lzma decompression failed: Unknown error");
966 decode_codec_id(const unsigned char *codecId, size_t id_size)
969 unsigned long id = 0;
971 for (i = 0; i < id_size; i++) {
981 struct archive_read *a = ((IByteIn*)p)->a;
982 struct _7zip *zip = (struct _7zip *)(a->format->data);
985 if (zip->ppstream.avail_in == 0) {
986 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
987 "Truncated RAR file data");
988 zip->ppstream.overconsumed = 1;
991 b = *zip->ppstream.next_in++;
992 zip->ppstream.avail_in--;
993 zip->ppstream.total_in++;
998 init_decompression(struct archive_read *a, struct _7zip *zip,
999 const struct _7z_coder *coder1, const struct _7z_coder *coder2)
1003 zip->codec = coder1->codec;
1006 switch (zip->codec) {
1011 if (coder2 != NULL) {
1012 if (coder2->codec != _7Z_X86 &&
1013 coder2->codec != _7Z_X86_BCJ2) {
1014 archive_set_error(&a->archive,
1016 "Unsupported filter %lx for %lx",
1017 coder2->codec, coder1->codec);
1018 return (ARCHIVE_FAILED);
1020 zip->codec2 = coder2->codec;
1022 if (coder2->codec == _7Z_X86)
1030 switch (zip->codec) {
1034 case _7Z_LZMA: case _7Z_LZMA2:
1036 #if LZMA_VERSION_MAJOR >= 5
1037 /* Effectively disable the limiter. */
1038 #define LZMA_MEMLIMIT UINT64_MAX
1040 /* NOTE: This needs to check memory size which running system has. */
1041 #define LZMA_MEMLIMIT (1U << 30)
1044 lzma_options_delta delta_opt;
1045 lzma_filter filters[LZMA_FILTERS_MAX], *ff;
1048 if (zip->lzstream_valid) {
1049 lzma_end(&(zip->lzstream));
1050 zip->lzstream_valid = 0;
1054 * NOTE: liblzma incompletely handle the BCJ+LZMA compressed
1055 * data made by 7-Zip because 7-Zip does not add End-Of-
1056 * Payload Marker(EOPM) at the end of LZMA compressed data,
1057 * and so liblzma cannot know the end of the compressed data
1058 * without EOPM. So consequently liblzma will not return last
1059 * three or four bytes of uncompressed data because
1060 * LZMA_FILTER_X86 filter does not handle input data if its
1061 * data size is less than five bytes. If liblzma detect EOPM
1062 * or know the uncompressed data size, liblzma will flush out
1063 * the remaining that three or four bytes of uncompressed
1064 * data. That is why we have to use our converting program
1065 * for BCJ+LZMA. If we were able to tell the uncompressed
1066 * size to liblzma when using lzma_raw_decoder() liblzma
1067 * could correctly deal with BCJ+LZMA. But unfortunately
1068 * there is no way to do that.
1069 * Discussion about this can be found at XZ Utils forum.
1071 if (coder2 != NULL) {
1072 zip->codec2 = coder2->codec;
1074 filters[fi].options = NULL;
1075 switch (zip->codec2) {
1077 if (zip->codec == _7Z_LZMA2) {
1078 filters[fi].id = LZMA_FILTER_X86;
1081 /* Use our filter. */
1085 /* Use our filter. */
1089 filters[fi].id = LZMA_FILTER_DELTA;
1090 memset(&delta_opt, 0, sizeof(delta_opt));
1091 delta_opt.type = LZMA_DELTA_TYPE_BYTE;
1093 filters[fi].options = &delta_opt;
1096 /* Following filters have not been tested yet. */
1098 filters[fi].id = LZMA_FILTER_POWERPC;
1102 filters[fi].id = LZMA_FILTER_IA64;
1106 filters[fi].id = LZMA_FILTER_ARM;
1110 filters[fi].id = LZMA_FILTER_ARMTHUMB;
1114 filters[fi].id = LZMA_FILTER_SPARC;
1118 archive_set_error(&a->archive,
1120 "Unexpected codec ID: %lX", zip->codec2);
1121 return (ARCHIVE_FAILED);
1125 if (zip->codec == _7Z_LZMA2)
1126 filters[fi].id = LZMA_FILTER_LZMA2;
1128 filters[fi].id = LZMA_FILTER_LZMA1;
1129 filters[fi].options = NULL;
1131 r = lzma_properties_decode(&filters[fi], NULL,
1132 coder1->properties, (size_t)coder1->propertiesSize);
1135 return (ARCHIVE_FAILED);
1139 filters[fi].id = LZMA_VLI_UNKNOWN;
1140 filters[fi].options = NULL;
1141 r = lzma_raw_decoder(&(zip->lzstream), filters);
1145 return (ARCHIVE_FAILED);
1147 zip->lzstream_valid = 1;
1148 zip->lzstream.total_in = 0;
1149 zip->lzstream.total_out = 0;
1153 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
1154 "LZMA codec is unsupported");
1155 return (ARCHIVE_FAILED);
1158 #if defined(HAVE_BZLIB_H) && defined(BZ_CONFIG_ERROR)
1159 if (zip->bzstream_valid) {
1160 BZ2_bzDecompressEnd(&(zip->bzstream));
1161 zip->bzstream_valid = 0;
1163 r = BZ2_bzDecompressInit(&(zip->bzstream), 0, 0);
1164 if (r == BZ_MEM_ERROR)
1165 r = BZ2_bzDecompressInit(&(zip->bzstream), 0, 1);
1167 int err = ARCHIVE_ERRNO_MISC;
1168 const char *detail = NULL;
1170 case BZ_PARAM_ERROR:
1171 detail = "invalid setup parameter";
1175 detail = "out of memory";
1177 case BZ_CONFIG_ERROR:
1178 detail = "mis-compiled library";
1181 archive_set_error(&a->archive, err,
1182 "Internal error initializing decompressor: %s",
1183 detail != NULL ? detail : "??");
1184 zip->bzstream_valid = 0;
1185 return (ARCHIVE_FAILED);
1187 zip->bzstream_valid = 1;
1188 zip->bzstream.total_in_lo32 = 0;
1189 zip->bzstream.total_in_hi32 = 0;
1190 zip->bzstream.total_out_lo32 = 0;
1191 zip->bzstream.total_out_hi32 = 0;
1194 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
1195 "BZ2 codec is unsupported");
1196 return (ARCHIVE_FAILED);
1200 if (zip->stream_valid)
1201 r = inflateReset(&(zip->stream));
1203 r = inflateInit2(&(zip->stream),
1204 -15 /* Don't check for zlib header */);
1206 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
1207 "Couldn't initialize zlib stream.");
1208 return (ARCHIVE_FAILED);
1210 zip->stream_valid = 1;
1211 zip->stream.total_in = 0;
1212 zip->stream.total_out = 0;
1215 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
1216 "DEFLATE codec is unsupported");
1217 return (ARCHIVE_FAILED);
1224 if (zip->ppmd7_valid) {
1225 __archive_ppmd7_functions.Ppmd7_Free(
1226 &zip->ppmd7_context);
1227 zip->ppmd7_valid = 0;
1230 if (coder1->propertiesSize < 5) {
1231 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
1232 "Malformed PPMd parameter");
1233 return (ARCHIVE_FAILED);
1235 order = coder1->properties[0];
1236 msize = archive_le32dec(&(coder1->properties[1]));
1237 if (order < PPMD7_MIN_ORDER || order > PPMD7_MAX_ORDER ||
1238 msize < PPMD7_MIN_MEM_SIZE || msize > PPMD7_MAX_MEM_SIZE) {
1239 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
1240 "Malformed PPMd parameter");
1241 return (ARCHIVE_FAILED);
1243 __archive_ppmd7_functions.Ppmd7_Construct(&zip->ppmd7_context);
1244 r = __archive_ppmd7_functions.Ppmd7_Alloc(
1245 &zip->ppmd7_context, msize);
1247 archive_set_error(&a->archive, ENOMEM,
1248 "Coludn't allocate memory for PPMd");
1249 return (ARCHIVE_FATAL);
1251 __archive_ppmd7_functions.Ppmd7_Init(
1252 &zip->ppmd7_context, order);
1253 __archive_ppmd7_functions.Ppmd7z_RangeDec_CreateVTable(
1255 zip->ppmd7_valid = 1;
1256 zip->ppmd7_stat = 0;
1257 zip->ppstream.overconsumed = 0;
1258 zip->ppstream.total_in = 0;
1259 zip->ppstream.total_out = 0;
1270 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
1271 "Unexpected codec ID: %lX", zip->codec);
1272 return (ARCHIVE_FAILED);
1273 case _7Z_CRYPTO_MAIN_ZIP:
1274 case _7Z_CRYPTO_RAR_29:
1275 case _7Z_CRYPTO_AES_256_SHA_256:
1277 archive_entry_set_is_metadata_encrypted(a->entry, 1);
1278 archive_entry_set_is_data_encrypted(a->entry, 1);
1279 zip->has_encrypted_entries = 1;
1281 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
1282 "Crypto codec not supported yet (ID: 0x%lX)", zip->codec);
1283 return (ARCHIVE_FAILED);
1285 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
1286 "Unknown codec ID: %lX", zip->codec);
1287 return (ARCHIVE_FAILED);
1290 return (ARCHIVE_OK);
1294 decompress(struct archive_read *a, struct _7zip *zip,
1295 void *buff, size_t *outbytes, const void *b, size_t *used)
1297 const uint8_t *t_next_in;
1298 uint8_t *t_next_out;
1299 size_t o_avail_in, o_avail_out;
1300 size_t t_avail_in, t_avail_out;
1301 uint8_t *bcj2_next_out;
1302 size_t bcj2_avail_out;
1303 int r, ret = ARCHIVE_OK;
1305 t_avail_in = o_avail_in = *used;
1306 t_avail_out = o_avail_out = *outbytes;
1310 if (zip->codec != _7Z_LZMA2 && zip->codec2 == _7Z_X86) {
1313 /* Do not copy out the BCJ remaining bytes when the output
1314 * buffer size is less than five bytes. */
1315 if (o_avail_in != 0 && t_avail_out < 5 && zip->odd_bcj_size) {
1320 for (i = 0; zip->odd_bcj_size > 0 && t_avail_out; i++) {
1321 *t_next_out++ = zip->odd_bcj[i];
1323 zip->odd_bcj_size--;
1325 if (o_avail_in == 0 || t_avail_out == 0) {
1326 *used = o_avail_in - t_avail_in;
1327 *outbytes = o_avail_out - t_avail_out;
1328 if (o_avail_in == 0)
1334 bcj2_next_out = t_next_out;
1335 bcj2_avail_out = t_avail_out;
1336 if (zip->codec2 == _7Z_X86_BCJ2) {
1338 * Decord a remaining decompressed main stream for BCJ2.
1340 if (zip->tmp_stream_bytes_remaining) {
1342 size_t remaining = zip->tmp_stream_bytes_remaining;
1343 bytes = Bcj2_Decode(zip, t_next_out, t_avail_out);
1345 archive_set_error(&(a->archive),
1347 "BCJ2 conversion Failed");
1348 return (ARCHIVE_FAILED);
1350 zip->main_stream_bytes_remaining -=
1351 remaining - zip->tmp_stream_bytes_remaining;
1352 t_avail_out -= bytes;
1353 if (o_avail_in == 0 || t_avail_out == 0) {
1355 *outbytes = o_avail_out - t_avail_out;
1356 if (o_avail_in == 0 &&
1357 zip->tmp_stream_bytes_remaining)
1361 t_next_out += bytes;
1362 bcj2_next_out = t_next_out;
1363 bcj2_avail_out = t_avail_out;
1365 t_next_out = zip->tmp_stream_buff;
1366 t_avail_out = zip->tmp_stream_buff_size;
1369 switch (zip->codec) {
1373 (t_avail_in > t_avail_out)?t_avail_out:t_avail_in;
1375 memcpy(t_next_out, t_next_in, bytes);
1376 t_avail_in -= bytes;
1377 t_avail_out -= bytes;
1378 if (o_avail_in == 0)
1383 case _7Z_LZMA: case _7Z_LZMA2:
1384 zip->lzstream.next_in = t_next_in;
1385 zip->lzstream.avail_in = t_avail_in;
1386 zip->lzstream.next_out = t_next_out;
1387 zip->lzstream.avail_out = t_avail_out;
1389 r = lzma_code(&(zip->lzstream), LZMA_RUN);
1391 case LZMA_STREAM_END: /* Found end of stream. */
1392 lzma_end(&(zip->lzstream));
1393 zip->lzstream_valid = 0;
1396 case LZMA_OK: /* Decompressor made some progress. */
1399 archive_set_error(&(a->archive),
1401 "Decompression failed(%d)",
1403 return (ARCHIVE_FAILED);
1405 t_avail_in = zip->lzstream.avail_in;
1406 t_avail_out = zip->lzstream.avail_out;
1409 #if defined(HAVE_BZLIB_H) && defined(BZ_CONFIG_ERROR)
1411 zip->bzstream.next_in = (char *)(uintptr_t)t_next_in;
1412 zip->bzstream.avail_in = t_avail_in;
1413 zip->bzstream.next_out = (char *)(uintptr_t)t_next_out;
1414 zip->bzstream.avail_out = t_avail_out;
1415 r = BZ2_bzDecompress(&(zip->bzstream));
1417 case BZ_STREAM_END: /* Found end of stream. */
1418 switch (BZ2_bzDecompressEnd(&(zip->bzstream))) {
1422 archive_set_error(&(a->archive),
1424 "Failed to clean up decompressor");
1425 return (ARCHIVE_FAILED);
1427 zip->bzstream_valid = 0;
1430 case BZ_OK: /* Decompressor made some progress. */
1433 archive_set_error(&(a->archive),
1435 "bzip decompression failed");
1436 return (ARCHIVE_FAILED);
1438 t_avail_in = zip->bzstream.avail_in;
1439 t_avail_out = zip->bzstream.avail_out;
1444 zip->stream.next_in = (Bytef *)(uintptr_t)t_next_in;
1445 zip->stream.avail_in = (uInt)t_avail_in;
1446 zip->stream.next_out = t_next_out;
1447 zip->stream.avail_out = (uInt)t_avail_out;
1448 r = inflate(&(zip->stream), 0);
1450 case Z_STREAM_END: /* Found end of stream. */
1453 case Z_OK: /* Decompressor made some progress.*/
1456 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
1457 "File decompression failed (%d)", r);
1458 return (ARCHIVE_FAILED);
1460 t_avail_in = zip->stream.avail_in;
1461 t_avail_out = zip->stream.avail_out;
1466 uint64_t flush_bytes;
1468 if (!zip->ppmd7_valid || zip->ppmd7_stat < 0 ||
1470 archive_set_error(&(a->archive),
1472 "Decompression internal error");
1473 return (ARCHIVE_FAILED);
1475 zip->ppstream.next_in = t_next_in;
1476 zip->ppstream.avail_in = t_avail_in;
1477 zip->ppstream.next_out = t_next_out;
1478 zip->ppstream.avail_out = t_avail_out;
1479 if (zip->ppmd7_stat == 0) {
1481 zip->bytein.Read = &ppmd_read;
1482 zip->range_dec.Stream = &zip->bytein;
1483 r = __archive_ppmd7_functions.Ppmd7z_RangeDec_Init(
1486 zip->ppmd7_stat = -1;
1487 archive_set_error(&a->archive,
1489 "Failed to initialize PPMd range decorder");
1490 return (ARCHIVE_FAILED);
1492 if (zip->ppstream.overconsumed) {
1493 zip->ppmd7_stat = -1;
1494 return (ARCHIVE_FAILED);
1496 zip->ppmd7_stat = 1;
1499 if (t_avail_in == 0)
1500 /* XXX Flush out remaining decoded data XXX */
1501 flush_bytes = zip->folder_outbytes_remaining;
1508 sym = __archive_ppmd7_functions.Ppmd7_DecodeSymbol(
1509 &(zip->ppmd7_context), &(zip->range_dec.p));
1511 zip->ppmd7_stat = -1;
1512 archive_set_error(&a->archive,
1513 ARCHIVE_ERRNO_FILE_FORMAT,
1514 "Failed to decode PPMd");
1515 return (ARCHIVE_FAILED);
1517 if (zip->ppstream.overconsumed) {
1518 zip->ppmd7_stat = -1;
1519 return (ARCHIVE_FAILED);
1521 *zip->ppstream.next_out++ = (unsigned char)sym;
1522 zip->ppstream.avail_out--;
1523 zip->ppstream.total_out++;
1526 } while (zip->ppstream.avail_out &&
1527 (zip->ppstream.avail_in || flush_bytes));
1529 t_avail_in = (size_t)zip->ppstream.avail_in;
1530 t_avail_out = (size_t)zip->ppstream.avail_out;
1534 archive_set_error(&(a->archive), ARCHIVE_ERRNO_MISC,
1535 "Decompression internal error");
1536 return (ARCHIVE_FAILED);
1538 if (ret != ARCHIVE_OK && ret != ARCHIVE_EOF)
1541 *used = o_avail_in - t_avail_in;
1542 *outbytes = o_avail_out - t_avail_out;
1547 if (zip->codec != _7Z_LZMA2 && zip->codec2 == _7Z_X86) {
1548 size_t l = x86_Convert(zip, buff, *outbytes);
1549 zip->odd_bcj_size = *outbytes - l;
1550 if (zip->odd_bcj_size > 0 && zip->odd_bcj_size <= 4 &&
1551 o_avail_in && ret != ARCHIVE_EOF) {
1552 memcpy(zip->odd_bcj, ((unsigned char *)buff) + l,
1556 zip->odd_bcj_size = 0;
1560 * Decord BCJ2 with a decompressed main stream.
1562 if (zip->codec2 == _7Z_X86_BCJ2) {
1565 zip->tmp_stream_bytes_avail =
1566 zip->tmp_stream_buff_size - t_avail_out;
1567 if (zip->tmp_stream_bytes_avail >
1568 zip->main_stream_bytes_remaining)
1569 zip->tmp_stream_bytes_avail =
1570 zip->main_stream_bytes_remaining;
1571 zip->tmp_stream_bytes_remaining = zip->tmp_stream_bytes_avail;
1572 bytes = Bcj2_Decode(zip, bcj2_next_out, bcj2_avail_out);
1574 archive_set_error(&(a->archive),
1575 ARCHIVE_ERRNO_MISC, "BCJ2 conversion Failed");
1576 return (ARCHIVE_FAILED);
1578 zip->main_stream_bytes_remaining -=
1579 zip->tmp_stream_bytes_avail
1580 - zip->tmp_stream_bytes_remaining;
1581 bcj2_avail_out -= bytes;
1582 *outbytes = o_avail_out - bcj2_avail_out;
1589 free_decompression(struct archive_read *a, struct _7zip *zip)
1593 #if !defined(HAVE_ZLIB_H) &&\
1594 !(defined(HAVE_BZLIB_H) && defined(BZ_CONFIG_ERROR))
1595 (void)a;/* UNUSED */
1598 if (zip->lzstream_valid)
1599 lzma_end(&(zip->lzstream));
1601 #if defined(HAVE_BZLIB_H) && defined(BZ_CONFIG_ERROR)
1602 if (zip->bzstream_valid) {
1603 if (BZ2_bzDecompressEnd(&(zip->bzstream)) != BZ_OK) {
1604 archive_set_error(&a->archive,
1606 "Failed to clean up bzip2 decompressor");
1609 zip->bzstream_valid = 0;
1613 if (zip->stream_valid) {
1614 if (inflateEnd(&(zip->stream)) != Z_OK) {
1615 archive_set_error(&a->archive,
1617 "Failed to clean up zlib decompressor");
1620 zip->stream_valid = 0;
1623 if (zip->ppmd7_valid) {
1624 __archive_ppmd7_functions.Ppmd7_Free(
1625 &zip->ppmd7_context);
1626 zip->ppmd7_valid = 0;
1632 parse_7zip_uint64(struct archive_read *a, uint64_t *val)
1634 const unsigned char *p;
1635 unsigned char avail, mask;
1638 if ((p = header_bytes(a, 1)) == NULL)
1643 for (i = 0; i < 8; i++) {
1645 if ((p = header_bytes(a, 1)) == NULL)
1647 *val |= ((uint64_t)*p) << (8 * i);
1651 *val += ((uint64_t)(avail & (mask -1))) << (8 * i);
1658 read_Bools(struct archive_read *a, unsigned char *data, size_t num)
1660 const unsigned char *p;
1661 unsigned i, mask = 0, avail = 0;
1663 for (i = 0; i < num; i++) {
1665 if ((p = header_bytes(a, 1)) == NULL)
1670 data[i] = (avail & mask)?1:0;
1677 free_Digest(struct _7z_digests *d)
1684 read_Digests(struct archive_read *a, struct _7z_digests *d, size_t num)
1686 const unsigned char *p;
1691 memset(d, 0, sizeof(*d));
1693 d->defineds = malloc(num);
1694 if (d->defineds == NULL)
1699 if ((p = header_bytes(a, 1)) == NULL)
1702 if (read_Bools(a, d->defineds, num) < 0)
1705 /* All are defined */
1706 memset(d->defineds, 1, num);
1708 d->digests = calloc(num, sizeof(*d->digests));
1709 if (d->digests == NULL)
1711 for (i = 0; i < num; i++) {
1712 if (d->defineds[i]) {
1713 if ((p = header_bytes(a, 4)) == NULL)
1715 d->digests[i] = archive_le32dec(p);
1723 free_PackInfo(struct _7z_pack_info *pi)
1726 free(pi->positions);
1727 free_Digest(&(pi->digest));
1731 read_PackInfo(struct archive_read *a, struct _7z_pack_info *pi)
1733 const unsigned char *p;
1736 memset(pi, 0, sizeof(*pi));
1741 if (parse_7zip_uint64(a, &(pi->pos)) < 0)
1745 * Read NumPackStreams.
1747 if (parse_7zip_uint64(a, &(pi->numPackStreams)) < 0)
1749 if (pi->numPackStreams == 0)
1751 if (UMAX_ENTRY < pi->numPackStreams)
1755 * Read PackSizes[num]
1757 if ((p = header_bytes(a, 1)) == NULL)
1760 /* PackSizes[num] are not present. */
1764 pi->sizes = calloc((size_t)pi->numPackStreams, sizeof(uint64_t));
1765 pi->positions = calloc((size_t)pi->numPackStreams, sizeof(uint64_t));
1766 if (pi->sizes == NULL || pi->positions == NULL)
1769 for (i = 0; i < pi->numPackStreams; i++) {
1770 if (parse_7zip_uint64(a, &(pi->sizes[i])) < 0)
1775 * Read PackStreamDigests[num]
1777 if ((p = header_bytes(a, 1)) == NULL)
1780 /* PackStreamDigests[num] are not present. */
1781 pi->digest.defineds =
1782 calloc((size_t)pi->numPackStreams, sizeof(*pi->digest.defineds));
1783 pi->digest.digests =
1784 calloc((size_t)pi->numPackStreams, sizeof(*pi->digest.digests));
1785 if (pi->digest.defineds == NULL || pi->digest.digests == NULL)
1793 if (read_Digests(a, &(pi->digest), (size_t)pi->numPackStreams) < 0)
1797 * Must be marked by kEnd.
1799 if ((p = header_bytes(a, 1)) == NULL)
1807 free_Folder(struct _7z_folder *f)
1812 for (i = 0; i< f->numCoders; i++) {
1813 free(f->coders[i].properties);
1818 free(f->packedStreams);
1819 free(f->unPackSize);
1823 read_Folder(struct archive_read *a, struct _7z_folder *f)
1825 struct _7zip *zip = (struct _7zip *)a->format->data;
1826 const unsigned char *p;
1827 uint64_t numInStreamsTotal = 0;
1828 uint64_t numOutStreamsTotal = 0;
1831 memset(f, 0, sizeof(*f));
1836 if (parse_7zip_uint64(a, &(f->numCoders)) < 0)
1838 if (f->numCoders > 4)
1839 /* Too many coders. */
1842 f->coders = calloc((size_t)f->numCoders, sizeof(*f->coders));
1843 if (f->coders == NULL)
1845 for (i = 0; i< f->numCoders; i++) {
1849 if ((p = header_bytes(a, 1)) == NULL)
1855 * 5: 0 - No Attributes
1856 * 1 - There are Attributes;
1859 codec_size = *p & 0xf;
1860 simple = (*p & 0x10)?0:1;
1863 return (-1);/* Not supported. */
1866 * Read Decompression Method IDs.
1868 if ((p = header_bytes(a, codec_size)) == NULL)
1871 f->coders[i].codec = decode_codec_id(p, codec_size);
1874 f->coders[i].numInStreams = 1;
1875 f->coders[i].numOutStreams = 1;
1877 if (parse_7zip_uint64(
1878 a, &(f->coders[i].numInStreams)) < 0)
1880 if (UMAX_ENTRY < f->coders[i].numInStreams)
1882 if (parse_7zip_uint64(
1883 a, &(f->coders[i].numOutStreams)) < 0)
1885 if (UMAX_ENTRY < f->coders[i].numOutStreams)
1890 if (parse_7zip_uint64(
1891 a, &(f->coders[i].propertiesSize)) < 0)
1893 if ((p = header_bytes(
1894 a, (size_t)f->coders[i].propertiesSize)) == NULL)
1896 f->coders[i].properties =
1897 malloc((size_t)f->coders[i].propertiesSize);
1898 if (f->coders[i].properties == NULL)
1900 memcpy(f->coders[i].properties, p,
1901 (size_t)f->coders[i].propertiesSize);
1904 numInStreamsTotal += f->coders[i].numInStreams;
1905 numOutStreamsTotal += f->coders[i].numOutStreams;
1908 if (numOutStreamsTotal == 0 ||
1909 numInStreamsTotal < numOutStreamsTotal-1)
1912 f->numBindPairs = numOutStreamsTotal - 1;
1913 if (zip->header_bytes_remaining < f->numBindPairs)
1915 if (f->numBindPairs > 0) {
1917 calloc((size_t)f->numBindPairs, sizeof(*f->bindPairs));
1918 if (f->bindPairs == NULL)
1921 f->bindPairs = NULL;
1922 for (i = 0; i < f->numBindPairs; i++) {
1923 if (parse_7zip_uint64(a, &(f->bindPairs[i].inIndex)) < 0)
1925 if (UMAX_ENTRY < f->bindPairs[i].inIndex)
1927 if (parse_7zip_uint64(a, &(f->bindPairs[i].outIndex)) < 0)
1929 if (UMAX_ENTRY < f->bindPairs[i].outIndex)
1933 f->numPackedStreams = numInStreamsTotal - f->numBindPairs;
1935 calloc((size_t)f->numPackedStreams, sizeof(*f->packedStreams));
1936 if (f->packedStreams == NULL)
1938 if (f->numPackedStreams == 1) {
1939 for (i = 0; i < numInStreamsTotal; i++) {
1941 for (j = 0; j < f->numBindPairs; j++) {
1942 if (f->bindPairs[j].inIndex == i)
1945 if (j == f->numBindPairs)
1948 if (i == numInStreamsTotal)
1950 f->packedStreams[0] = i;
1952 for (i = 0; i < f->numPackedStreams; i++) {
1953 if (parse_7zip_uint64(a, &(f->packedStreams[i])) < 0)
1955 if (UMAX_ENTRY < f->packedStreams[i])
1959 f->numInStreams = numInStreamsTotal;
1960 f->numOutStreams = numOutStreamsTotal;
1966 free_CodersInfo(struct _7z_coders_info *ci)
1971 for (i = 0; i < ci->numFolders; i++)
1972 free_Folder(&(ci->folders[i]));
1978 read_CodersInfo(struct archive_read *a, struct _7z_coders_info *ci)
1980 const unsigned char *p;
1981 struct _7z_digests digest;
1984 memset(ci, 0, sizeof(*ci));
1985 memset(&digest, 0, sizeof(digest));
1987 if ((p = header_bytes(a, 1)) == NULL)
1995 if (parse_7zip_uint64(a, &(ci->numFolders)) < 0)
1997 if (UMAX_ENTRY < ci->numFolders)
2003 if ((p = header_bytes(a, 1)) == NULL)
2008 calloc((size_t)ci->numFolders, sizeof(*ci->folders));
2009 if (ci->folders == NULL)
2011 for (i = 0; i < ci->numFolders; i++) {
2012 if (read_Folder(a, &(ci->folders[i])) < 0)
2017 if (parse_7zip_uint64(a, &(ci->dataStreamIndex)) < 0)
2019 if (UMAX_ENTRY < ci->dataStreamIndex)
2021 if (ci->numFolders > 0) {
2022 archive_set_error(&a->archive, -1,
2023 "Malformed 7-Zip archive");
2028 archive_set_error(&a->archive, -1,
2029 "Malformed 7-Zip archive");
2033 if ((p = header_bytes(a, 1)) == NULL)
2035 if (*p != kCodersUnPackSize)
2038 for (i = 0; i < ci->numFolders; i++) {
2039 struct _7z_folder *folder = &(ci->folders[i]);
2042 folder->unPackSize =
2043 calloc((size_t)folder->numOutStreams, sizeof(*folder->unPackSize));
2044 if (folder->unPackSize == NULL)
2046 for (j = 0; j < folder->numOutStreams; j++) {
2047 if (parse_7zip_uint64(a, &(folder->unPackSize[j])) < 0)
2055 if ((p = header_bytes(a, 1)) == NULL)
2061 if (read_Digests(a, &digest, (size_t)ci->numFolders) < 0)
2063 for (i = 0; i < ci->numFolders; i++) {
2064 ci->folders[i].digest_defined = digest.defineds[i];
2065 ci->folders[i].digest = digest.digests[i];
2071 if ((p = header_bytes(a, 1)) == NULL)
2075 free_Digest(&digest);
2078 free_Digest(&digest);
2083 folder_uncompressed_size(struct _7z_folder *f)
2085 int n = (int)f->numOutStreams;
2086 unsigned pairs = (unsigned)f->numBindPairs;
2090 for (i = 0; i < pairs; i++) {
2091 if (f->bindPairs[i].outIndex == (uint64_t)n)
2095 return (f->unPackSize[n]);
2101 free_SubStreamsInfo(struct _7z_substream_info *ss)
2103 free(ss->unpackSizes);
2104 free(ss->digestsDefined);
2109 read_SubStreamsInfo(struct archive_read *a, struct _7z_substream_info *ss,
2110 struct _7z_folder *f, size_t numFolders)
2112 const unsigned char *p;
2114 size_t unpack_streams;
2117 uint32_t numDigests;
2119 memset(ss, 0, sizeof(*ss));
2121 for (i = 0; i < numFolders; i++)
2122 f[i].numUnpackStreams = 1;
2124 if ((p = header_bytes(a, 1)) == NULL)
2128 if (type == kNumUnPackStream) {
2130 for (i = 0; i < numFolders; i++) {
2131 if (parse_7zip_uint64(a, &(f[i].numUnpackStreams)) < 0)
2133 if (UMAX_ENTRY < f[i].numUnpackStreams)
2135 if (unpack_streams > SIZE_MAX - UMAX_ENTRY) {
2138 unpack_streams += (size_t)f[i].numUnpackStreams;
2140 if ((p = header_bytes(a, 1)) == NULL)
2144 unpack_streams = numFolders;
2146 ss->unpack_streams = unpack_streams;
2147 if (unpack_streams) {
2148 ss->unpackSizes = calloc(unpack_streams,
2149 sizeof(*ss->unpackSizes));
2150 ss->digestsDefined = calloc(unpack_streams,
2151 sizeof(*ss->digestsDefined));
2152 ss->digests = calloc(unpack_streams,
2153 sizeof(*ss->digests));
2154 if (ss->unpackSizes == NULL || ss->digestsDefined == NULL ||
2155 ss->digests == NULL)
2159 usizes = ss->unpackSizes;
2160 for (i = 0; i < numFolders; i++) {
2164 if (f[i].numUnpackStreams == 0)
2168 if (type == kSize) {
2169 for (pack = 1; pack < f[i].numUnpackStreams; pack++) {
2170 if (parse_7zip_uint64(a, usizes) < 0)
2175 *usizes++ = folder_uncompressed_size(&f[i]) - sum;
2178 if (type == kSize) {
2179 if ((p = header_bytes(a, 1)) == NULL)
2184 for (i = 0; i < unpack_streams; i++) {
2185 ss->digestsDefined[i] = 0;
2190 for (i = 0; i < numFolders; i++) {
2191 if (f[i].numUnpackStreams != 1 || !f[i].digest_defined)
2192 numDigests += (uint32_t)f[i].numUnpackStreams;
2196 struct _7z_digests tmpDigests;
2197 unsigned char *digestsDefined = ss->digestsDefined;
2198 uint32_t * digests = ss->digests;
2201 memset(&tmpDigests, 0, sizeof(tmpDigests));
2202 if (read_Digests(a, &(tmpDigests), numDigests) < 0) {
2203 free_Digest(&tmpDigests);
2206 for (i = 0; i < numFolders; i++) {
2207 if (f[i].numUnpackStreams == 1 && f[i].digest_defined) {
2208 *digestsDefined++ = 1;
2209 *digests++ = f[i].digest;
2213 for (j = 0; j < f[i].numUnpackStreams;
2216 tmpDigests.defineds[di];
2218 tmpDigests.digests[di];
2222 free_Digest(&tmpDigests);
2223 if ((p = header_bytes(a, 1)) == NULL)
2237 free_StreamsInfo(struct _7z_stream_info *si)
2239 free_PackInfo(&(si->pi));
2240 free_CodersInfo(&(si->ci));
2241 free_SubStreamsInfo(&(si->ss));
2245 read_StreamsInfo(struct archive_read *a, struct _7z_stream_info *si)
2247 struct _7zip *zip = (struct _7zip *)a->format->data;
2248 const unsigned char *p;
2251 memset(si, 0, sizeof(*si));
2253 if ((p = header_bytes(a, 1)) == NULL)
2255 if (*p == kPackInfo) {
2258 if (read_PackInfo(a, &(si->pi)) < 0)
2261 if (si->pi.positions == NULL || si->pi.sizes == NULL)
2264 * Calculate packed stream positions.
2266 packPos = si->pi.pos;
2267 for (i = 0; i < si->pi.numPackStreams; i++) {
2268 si->pi.positions[i] = packPos;
2269 packPos += si->pi.sizes[i];
2270 if (packPos > zip->header_offset)
2273 if ((p = header_bytes(a, 1)) == NULL)
2276 if (*p == kUnPackInfo) {
2278 struct _7z_folder *f;
2280 if (read_CodersInfo(a, &(si->ci)) < 0)
2284 * Calculate packed stream indexes.
2288 for (i = 0; i < si->ci.numFolders; i++) {
2289 f[i].packIndex = packIndex;
2290 packIndex += (uint32_t)f[i].numPackedStreams;
2291 if (packIndex > si->pi.numPackStreams)
2294 if ((p = header_bytes(a, 1)) == NULL)
2298 if (*p == kSubStreamsInfo) {
2299 if (read_SubStreamsInfo(a, &(si->ss),
2300 si->ci.folders, (size_t)si->ci.numFolders) < 0)
2302 if ((p = header_bytes(a, 1)) == NULL)
2315 free_Header(struct _7z_header_info *h)
2317 free(h->emptyStreamBools);
2318 free(h->emptyFileBools);
2324 read_Header(struct archive_read *a, struct _7z_header_info *h,
2325 int check_header_id)
2327 struct _7zip *zip = (struct _7zip *)a->format->data;
2328 const unsigned char *p;
2329 struct _7z_folder *folders;
2330 struct _7z_stream_info *si = &(zip->si);
2331 struct _7zip_entry *entries;
2332 uint32_t folderIndex, indexInFolder;
2334 int eindex, empty_streams, sindex;
2336 if (check_header_id) {
2340 if ((p = header_bytes(a, 1)) == NULL)
2347 * Read ArchiveProperties.
2349 if ((p = header_bytes(a, 1)) == NULL)
2351 if (*p == kArchiveProperties) {
2354 if ((p = header_bytes(a, 1)) == NULL)
2358 if (parse_7zip_uint64(a, &size) < 0)
2361 if ((p = header_bytes(a, 1)) == NULL)
2366 * Read MainStreamsInfo.
2368 if (*p == kMainStreamsInfo) {
2369 if (read_StreamsInfo(a, &(zip->si)) < 0)
2371 if ((p = header_bytes(a, 1)) == NULL)
2380 if (*p != kFilesInfo)
2383 if (parse_7zip_uint64(a, &(zip->numFiles)) < 0)
2385 if (UMAX_ENTRY < zip->numFiles)
2388 zip->entries = calloc((size_t)zip->numFiles, sizeof(*zip->entries));
2389 if (zip->entries == NULL)
2391 entries = zip->entries;
2399 if ((p = header_bytes(a, 1)) == NULL)
2405 if (parse_7zip_uint64(a, &size) < 0)
2407 if (zip->header_bytes_remaining < size)
2413 if (h->emptyStreamBools != NULL)
2415 h->emptyStreamBools = calloc((size_t)zip->numFiles,
2416 sizeof(*h->emptyStreamBools));
2417 if (h->emptyStreamBools == NULL)
2420 a, h->emptyStreamBools, (size_t)zip->numFiles) < 0)
2423 for (i = 0; i < zip->numFiles; i++) {
2424 if (h->emptyStreamBools[i])
2429 if (empty_streams <= 0) {
2430 /* Unexcepted sequence. Skip this. */
2431 if (header_bytes(a, ll) == NULL)
2435 if (h->emptyFileBools != NULL)
2437 h->emptyFileBools = calloc(empty_streams,
2438 sizeof(*h->emptyFileBools));
2439 if (h->emptyFileBools == NULL)
2441 if (read_Bools(a, h->emptyFileBools, empty_streams) < 0)
2445 if (empty_streams <= 0) {
2446 /* Unexcepted sequence. Skip this. */
2447 if (header_bytes(a, ll) == NULL)
2451 if (h->antiBools != NULL)
2453 h->antiBools = calloc(empty_streams,
2454 sizeof(*h->antiBools));
2455 if (h->antiBools == NULL)
2457 if (read_Bools(a, h->antiBools, empty_streams) < 0)
2463 if (read_Times(a, h, type) < 0)
2471 /* Skip one byte. */
2472 if ((p = header_bytes(a, 1)) == NULL)
2476 if ((ll & 1) || ll < zip->numFiles * 4)
2479 if (zip->entry_names != NULL)
2481 zip->entry_names = malloc(ll);
2482 if (zip->entry_names == NULL)
2484 np = zip->entry_names;
2487 * Copy whole file names.
2488 * NOTE: This loop prevents from expanding
2489 * the uncompressed buffer in order not to
2490 * use extra memory resource.
2494 if (nb > UBUFF_SIZE)
2498 if ((p = header_bytes(a, b)) == NULL)
2504 np = zip->entry_names;
2507 for (i = 0; i < zip->numFiles; i++) {
2508 entries[i].utf16name = np;
2509 #if defined(_WIN32) && !defined(__CYGWIN__) && defined(_DEBUG)
2510 entries[i].wname = (wchar_t *)np;
2513 /* Find a terminator. */
2514 while (nl >= 2 && (np[0] || np[1])) {
2519 return (-1);/* Terminator not found */
2520 entries[i].name_len = np - entries[i].utf16name;
2530 if ((p = header_bytes(a, 2)) == NULL)
2533 if (h->attrBools != NULL)
2535 h->attrBools = calloc((size_t)zip->numFiles,
2536 sizeof(*h->attrBools));
2537 if (h->attrBools == NULL)
2540 memset(h->attrBools, 1, (size_t)zip->numFiles);
2542 if (read_Bools(a, h->attrBools,
2543 (size_t)zip->numFiles) < 0)
2546 for (i = 0; i < zip->numFiles; i++) {
2547 if (h->attrBools[i]) {
2548 if ((p = header_bytes(a, 4)) == NULL)
2550 entries[i].attr = archive_le32dec(p);
2560 if (header_bytes(a, ll) == NULL)
2567 * Set up entry's attributes.
2569 folders = si->ci.folders;
2570 eindex = sindex = 0;
2571 folderIndex = indexInFolder = 0;
2572 for (i = 0; i < zip->numFiles; i++) {
2573 if (h->emptyStreamBools == NULL || h->emptyStreamBools[i] == 0)
2574 entries[i].flg |= HAS_STREAM;
2575 /* The high 16 bits of attributes is a posix file mode. */
2576 entries[i].mode = entries[i].attr >> 16;
2577 if (entries[i].flg & HAS_STREAM) {
2578 if ((size_t)sindex >= si->ss.unpack_streams)
2580 if (entries[i].mode == 0)
2581 entries[i].mode = AE_IFREG | 0666;
2582 if (si->ss.digestsDefined[sindex])
2583 entries[i].flg |= CRC32_IS_SET;
2584 entries[i].ssIndex = sindex;
2588 if (h->emptyFileBools == NULL)
2591 if (h->emptyFileBools[eindex])
2597 if (entries[i].mode == 0) {
2599 entries[i].mode = AE_IFDIR | 0777;
2601 entries[i].mode = AE_IFREG | 0666;
2603 (entries[i].mode & AE_IFMT) != AE_IFDIR) {
2604 entries[i].mode &= ~AE_IFMT;
2605 entries[i].mode |= AE_IFDIR;
2607 if ((entries[i].mode & AE_IFMT) == AE_IFDIR &&
2608 entries[i].name_len >= 2 &&
2609 (entries[i].utf16name[entries[i].name_len-2] != '/' ||
2610 entries[i].utf16name[entries[i].name_len-1] != 0)) {
2611 entries[i].utf16name[entries[i].name_len] = '/';
2612 entries[i].utf16name[entries[i].name_len+1] = 0;
2613 entries[i].name_len += 2;
2615 entries[i].ssIndex = -1;
2617 if (entries[i].attr & 0x01)
2618 entries[i].mode &= ~0222;/* Read only. */
2620 if ((entries[i].flg & HAS_STREAM) == 0 && indexInFolder == 0) {
2622 * The entry is an empty file or a directory file,
2623 * those both have no contents.
2625 entries[i].folderIndex = -1;
2628 if (indexInFolder == 0) {
2630 if (folderIndex >= si->ci.numFolders)
2632 if (folders[folderIndex].numUnpackStreams)
2637 entries[i].folderIndex = folderIndex;
2638 if ((entries[i].flg & HAS_STREAM) == 0)
2641 if (indexInFolder >= folders[folderIndex].numUnpackStreams) {
2650 #define EPOC_TIME ARCHIVE_LITERAL_ULL(116444736000000000)
2652 fileTimeToUtc(uint64_t fileTime, time_t *timep, long *ns)
2655 if (fileTime >= EPOC_TIME) {
2656 fileTime -= EPOC_TIME;
2657 /* milli seconds base */
2658 *timep = (time_t)(fileTime / 10000000);
2659 /* nano seconds base */
2660 *ns = (long)(fileTime % 10000000) * 100;
2668 read_Times(struct archive_read *a, struct _7z_header_info *h, int type)
2670 struct _7zip *zip = (struct _7zip *)a->format->data;
2671 const unsigned char *p;
2672 struct _7zip_entry *entries = zip->entries;
2673 unsigned char *timeBools;
2677 timeBools = calloc((size_t)zip->numFiles, sizeof(*timeBools));
2678 if (timeBools == NULL)
2681 /* Read allAreDefined. */
2682 if ((p = header_bytes(a, 1)) == NULL)
2686 memset(timeBools, 1, (size_t)zip->numFiles);
2688 if (read_Bools(a, timeBools, (size_t)zip->numFiles) < 0)
2692 /* Read external. */
2693 if ((p = header_bytes(a, 1)) == NULL)
2696 if (parse_7zip_uint64(a, &(h->dataIndex)) < 0)
2698 if (UMAX_ENTRY < h->dataIndex)
2702 for (i = 0; i < zip->numFiles; i++) {
2705 if ((p = header_bytes(a, 8)) == NULL)
2709 fileTimeToUtc(archive_le64dec(p),
2710 &(entries[i].ctime),
2711 &(entries[i].ctime_ns));
2712 entries[i].flg |= CTIME_IS_SET;
2715 fileTimeToUtc(archive_le64dec(p),
2716 &(entries[i].atime),
2717 &(entries[i].atime_ns));
2718 entries[i].flg |= ATIME_IS_SET;
2721 fileTimeToUtc(archive_le64dec(p),
2722 &(entries[i].mtime),
2723 &(entries[i].mtime_ns));
2724 entries[i].flg |= MTIME_IS_SET;
2737 decode_encoded_header_info(struct archive_read *a, struct _7z_stream_info *si)
2739 struct _7zip *zip = (struct _7zip *)a->format->data;
2742 if (read_StreamsInfo(a, si) < 0) {
2743 if (errno == ENOMEM)
2744 archive_set_error(&a->archive, -1,
2745 "Couldn't allocate memory");
2747 archive_set_error(&a->archive, -1,
2748 "Malformed 7-Zip archive");
2749 return (ARCHIVE_FATAL);
2752 if (si->pi.numPackStreams == 0 || si->ci.numFolders == 0) {
2753 archive_set_error(&a->archive, -1, "Malformed 7-Zip archive");
2754 return (ARCHIVE_FATAL);
2757 if (zip->header_offset < si->pi.pos + si->pi.sizes[0] ||
2758 (int64_t)(si->pi.pos + si->pi.sizes[0]) < 0 ||
2759 si->pi.sizes[0] == 0 || (int64_t)si->pi.pos < 0) {
2760 archive_set_error(&a->archive, -1, "Malformed Header offset");
2761 return (ARCHIVE_FATAL);
2764 return (ARCHIVE_OK);
2767 static const unsigned char *
2768 header_bytes(struct archive_read *a, size_t rbytes)
2770 struct _7zip *zip = (struct _7zip *)a->format->data;
2771 const unsigned char *p;
2773 if (zip->header_bytes_remaining < rbytes)
2775 if (zip->pack_stream_bytes_unconsumed)
2778 if (zip->header_is_encoded == 0) {
2779 p = __archive_read_ahead(a, rbytes, NULL);
2782 zip->header_bytes_remaining -= rbytes;
2783 zip->pack_stream_bytes_unconsumed = rbytes;
2788 bytes = read_stream(a, &buff, rbytes, rbytes);
2791 zip->header_bytes_remaining -= bytes;
2795 /* Update checksum */
2796 zip->header_crc32 = crc32(zip->header_crc32, p, (unsigned)rbytes);
2801 slurp_central_directory(struct archive_read *a, struct _7zip *zip,
2802 struct _7z_header_info *header)
2804 const unsigned char *p;
2805 uint64_t next_header_offset;
2806 uint64_t next_header_size;
2807 uint32_t next_header_crc;
2808 ssize_t bytes_avail;
2809 int check_header_crc, r;
2811 if ((p = __archive_read_ahead(a, 32, &bytes_avail)) == NULL)
2812 return (ARCHIVE_FATAL);
2814 if ((p[0] == 'M' && p[1] == 'Z') || memcmp(p, "\x7F\x45LF", 4) == 0) {
2815 /* This is an executable ? Must be self-extracting... */
2816 r = skip_sfx(a, bytes_avail);
2817 if (r < ARCHIVE_WARN)
2819 if ((p = __archive_read_ahead(a, 32, &bytes_avail)) == NULL)
2820 return (ARCHIVE_FATAL);
2822 zip->seek_base += 32;
2824 if (memcmp(p, _7ZIP_SIGNATURE, 6) != 0) {
2825 archive_set_error(&a->archive, -1, "Not 7-Zip archive file");
2826 return (ARCHIVE_FATAL);
2830 if (crc32(0, (const unsigned char *)p + 12, 20)
2831 != archive_le32dec(p + 8)) {
2832 archive_set_error(&a->archive, -1, "Header CRC error");
2833 return (ARCHIVE_FATAL);
2836 next_header_offset = archive_le64dec(p + 12);
2837 next_header_size = archive_le64dec(p + 20);
2838 next_header_crc = archive_le32dec(p + 28);
2840 if (next_header_size == 0)
2841 /* There is no entry in an archive file. */
2842 return (ARCHIVE_EOF);
2844 if (((int64_t)next_header_offset) < 0) {
2845 archive_set_error(&a->archive, -1, "Malformed 7-Zip archive");
2846 return (ARCHIVE_FATAL);
2848 __archive_read_consume(a, 32);
2849 if (next_header_offset != 0) {
2850 if (bytes_avail >= (ssize_t)next_header_offset)
2851 __archive_read_consume(a, next_header_offset);
2852 else if (__archive_read_seek(a,
2853 next_header_offset + zip->seek_base, SEEK_SET) < 0)
2854 return (ARCHIVE_FATAL);
2856 zip->stream_offset = next_header_offset;
2857 zip->header_offset = next_header_offset;
2858 zip->header_bytes_remaining = next_header_size;
2859 zip->header_crc32 = 0;
2860 zip->header_is_encoded = 0;
2861 zip->header_is_being_read = 1;
2862 zip->has_encrypted_entries = 0;
2863 check_header_crc = 1;
2865 if ((p = header_bytes(a, 1)) == NULL) {
2866 archive_set_error(&a->archive,
2867 ARCHIVE_ERRNO_FILE_FORMAT,
2868 "Truncated 7-Zip file body");
2869 return (ARCHIVE_FATAL);
2871 /* Parse ArchiveProperties. */
2873 case kEncodedHeader:
2875 * The archive has an encoded header and we have to decode it
2876 * in order to parse the header correctly.
2878 r = decode_encoded_header_info(a, &(zip->si));
2880 /* Check the EncodedHeader CRC.*/
2881 if (r == 0 && zip->header_crc32 != next_header_crc) {
2882 archive_set_error(&a->archive, -1,
2883 "Damaged 7-Zip archive");
2887 if (zip->si.ci.folders[0].digest_defined)
2888 next_header_crc = zip->si.ci.folders[0].digest;
2890 check_header_crc = 0;
2891 if (zip->pack_stream_bytes_unconsumed)
2893 r = setup_decode_folder(a, zip->si.ci.folders, 1);
2895 zip->header_bytes_remaining =
2896 zip->folder_outbytes_remaining;
2900 /* Clean up StreamsInfo. */
2901 free_StreamsInfo(&(zip->si));
2902 memset(&(zip->si), 0, sizeof(zip->si));
2904 return (ARCHIVE_FATAL);
2905 zip->header_is_encoded = 1;
2906 zip->header_crc32 = 0;
2913 r = read_Header(a, header, zip->header_is_encoded);
2915 if (errno == ENOMEM)
2916 archive_set_error(&a->archive, -1,
2917 "Couldn't allocate memory");
2919 archive_set_error(&a->archive, -1,
2920 "Damaged 7-Zip archive");
2921 return (ARCHIVE_FATAL);
2927 if ((p = header_bytes(a, 1)) == NULL ||*p != kEnd) {
2928 archive_set_error(&a->archive, -1,
2929 "Malformed 7-Zip archive");
2930 return (ARCHIVE_FATAL);
2933 /* Check the Header CRC.*/
2934 if (check_header_crc && zip->header_crc32 != next_header_crc) {
2935 archive_set_error(&a->archive, -1,
2936 "Malformed 7-Zip archive");
2937 return (ARCHIVE_FATAL);
2941 archive_set_error(&a->archive, -1,
2942 "Unexpected Property ID = %X", p[0]);
2943 return (ARCHIVE_FATAL);
2946 /* Clean up variables be used for decoding the archive header */
2947 zip->pack_stream_remaining = 0;
2948 zip->pack_stream_index = 0;
2949 zip->folder_outbytes_remaining = 0;
2950 zip->uncompressed_buffer_bytes_remaining = 0;
2951 zip->pack_stream_bytes_unconsumed = 0;
2952 zip->header_is_being_read = 0;
2954 return (ARCHIVE_OK);
2958 get_uncompressed_data(struct archive_read *a, const void **buff, size_t size,
2961 struct _7zip *zip = (struct _7zip *)a->format->data;
2962 ssize_t bytes_avail;
2964 if (zip->codec == _7Z_COPY && zip->codec2 == (unsigned long)-1) {
2968 * Note: '1' here is a performance optimization.
2969 * Recall that the decompression layer returns a count of
2970 * available bytes; asking for more than that forces the
2971 * decompressor to combine reads by copying data.
2973 *buff = __archive_read_ahead(a, 1, &bytes_avail);
2974 if (bytes_avail <= 0) {
2975 archive_set_error(&a->archive,
2976 ARCHIVE_ERRNO_FILE_FORMAT,
2977 "Truncated 7-Zip file data");
2978 return (ARCHIVE_FATAL);
2980 if ((size_t)bytes_avail >
2981 zip->uncompressed_buffer_bytes_remaining)
2982 bytes_avail = (ssize_t)
2983 zip->uncompressed_buffer_bytes_remaining;
2984 if ((size_t)bytes_avail > size)
2985 bytes_avail = (ssize_t)size;
2987 zip->pack_stream_bytes_unconsumed = bytes_avail;
2988 } else if (zip->uncompressed_buffer_pointer == NULL) {
2989 /* Decompression has failed. */
2990 archive_set_error(&(a->archive),
2991 ARCHIVE_ERRNO_MISC, "Damaged 7-Zip archive");
2992 return (ARCHIVE_FATAL);
2995 if (minimum > zip->uncompressed_buffer_bytes_remaining) {
2997 * If remaining uncompressed data size is less than
2998 * the minimum size, fill the buffer up to the
3001 if (extract_pack_stream(a, minimum) < 0)
3002 return (ARCHIVE_FATAL);
3004 if (size > zip->uncompressed_buffer_bytes_remaining)
3005 bytes_avail = (ssize_t)
3006 zip->uncompressed_buffer_bytes_remaining;
3008 bytes_avail = (ssize_t)size;
3009 *buff = zip->uncompressed_buffer_pointer;
3010 zip->uncompressed_buffer_pointer += bytes_avail;
3012 zip->uncompressed_buffer_bytes_remaining -= bytes_avail;
3013 return (bytes_avail);
3017 extract_pack_stream(struct archive_read *a, size_t minimum)
3019 struct _7zip *zip = (struct _7zip *)a->format->data;
3020 ssize_t bytes_avail;
3023 if (zip->codec == _7Z_COPY && zip->codec2 == (unsigned long)-1) {
3026 if (__archive_read_ahead(a, minimum, &bytes_avail) == NULL
3027 || bytes_avail <= 0) {
3028 archive_set_error(&a->archive,
3029 ARCHIVE_ERRNO_FILE_FORMAT,
3030 "Truncated 7-Zip file body");
3031 return (ARCHIVE_FATAL);
3033 if (bytes_avail > (ssize_t)zip->pack_stream_inbytes_remaining)
3034 bytes_avail = (ssize_t)zip->pack_stream_inbytes_remaining;
3035 zip->pack_stream_inbytes_remaining -= bytes_avail;
3036 if (bytes_avail > (ssize_t)zip->folder_outbytes_remaining)
3037 bytes_avail = (ssize_t)zip->folder_outbytes_remaining;
3038 zip->folder_outbytes_remaining -= bytes_avail;
3039 zip->uncompressed_buffer_bytes_remaining = bytes_avail;
3040 return (ARCHIVE_OK);
3043 /* If the buffer hasn't been allocated, allocate it now. */
3044 if (zip->uncompressed_buffer == NULL) {
3045 zip->uncompressed_buffer_size = UBUFF_SIZE;
3046 if (zip->uncompressed_buffer_size < minimum) {
3047 zip->uncompressed_buffer_size = minimum + 1023;
3048 zip->uncompressed_buffer_size &= ~0x3ff;
3050 zip->uncompressed_buffer =
3051 malloc(zip->uncompressed_buffer_size);
3052 if (zip->uncompressed_buffer == NULL) {
3053 archive_set_error(&a->archive, ENOMEM,
3054 "No memory for 7-Zip decompression");
3055 return (ARCHIVE_FATAL);
3057 zip->uncompressed_buffer_bytes_remaining = 0;
3058 } else if (zip->uncompressed_buffer_size < minimum ||
3059 zip->uncompressed_buffer_bytes_remaining < minimum) {
3061 * Make sure the uncompressed buffer can have bytes
3062 * at least `minimum' bytes.
3063 * NOTE: This case happen when reading the header.
3066 if (zip->uncompressed_buffer_pointer != 0)
3067 used = zip->uncompressed_buffer_pointer -
3068 zip->uncompressed_buffer;
3071 if (zip->uncompressed_buffer_size < minimum) {
3073 * Expand the uncompressed buffer up to
3079 new_size = minimum + 1023;
3081 p = realloc(zip->uncompressed_buffer, new_size);
3083 archive_set_error(&a->archive, ENOMEM,
3084 "No memory for 7-Zip decompression");
3085 return (ARCHIVE_FATAL);
3087 zip->uncompressed_buffer = (unsigned char *)p;
3088 zip->uncompressed_buffer_size = new_size;
3091 * Move unconsumed bytes to the head.
3094 memmove(zip->uncompressed_buffer,
3095 zip->uncompressed_buffer + used,
3096 zip->uncompressed_buffer_bytes_remaining);
3099 zip->uncompressed_buffer_bytes_remaining = 0;
3100 zip->uncompressed_buffer_pointer = NULL;
3102 size_t bytes_in, bytes_out;
3103 const void *buff_in;
3104 unsigned char *buff_out;
3108 * Note: '1' here is a performance optimization.
3109 * Recall that the decompression layer returns a count of
3110 * available bytes; asking for more than that forces the
3111 * decompressor to combine reads by copying data.
3113 buff_in = __archive_read_ahead(a, 1, &bytes_avail);
3114 if (bytes_avail <= 0) {
3115 archive_set_error(&a->archive,
3116 ARCHIVE_ERRNO_FILE_FORMAT,
3117 "Truncated 7-Zip file body");
3118 return (ARCHIVE_FATAL);
3121 buff_out = zip->uncompressed_buffer
3122 + zip->uncompressed_buffer_bytes_remaining;
3123 bytes_out = zip->uncompressed_buffer_size
3124 - zip->uncompressed_buffer_bytes_remaining;
3125 bytes_in = bytes_avail;
3126 if (bytes_in > zip->pack_stream_inbytes_remaining)
3127 bytes_in = (size_t)zip->pack_stream_inbytes_remaining;
3128 /* Drive decompression. */
3129 r = decompress(a, zip, buff_out, &bytes_out,
3130 buff_in, &bytes_in);
3139 return (ARCHIVE_FATAL);
3141 zip->pack_stream_inbytes_remaining -= bytes_in;
3142 if (bytes_out > zip->folder_outbytes_remaining)
3143 bytes_out = (size_t)zip->folder_outbytes_remaining;
3144 zip->folder_outbytes_remaining -= bytes_out;
3145 zip->uncompressed_buffer_bytes_remaining += bytes_out;
3146 zip->pack_stream_bytes_unconsumed = bytes_in;
3149 * Continue decompression until uncompressed_buffer is full.
3151 if (zip->uncompressed_buffer_bytes_remaining ==
3152 zip->uncompressed_buffer_size)
3154 if (zip->codec2 == _7Z_X86 && zip->odd_bcj_size &&
3155 zip->uncompressed_buffer_bytes_remaining + 5 >
3156 zip->uncompressed_buffer_size)
3158 if (zip->pack_stream_inbytes_remaining == 0 &&
3159 zip->folder_outbytes_remaining == 0)
3161 if (end_of_data || (bytes_in == 0 && bytes_out == 0)) {
3162 archive_set_error(&(a->archive),
3163 ARCHIVE_ERRNO_MISC, "Damaged 7-Zip archive");
3164 return (ARCHIVE_FATAL);
3168 if (zip->uncompressed_buffer_bytes_remaining < minimum) {
3169 archive_set_error(&(a->archive),
3170 ARCHIVE_ERRNO_MISC, "Damaged 7-Zip archive");
3171 return (ARCHIVE_FATAL);
3173 zip->uncompressed_buffer_pointer = zip->uncompressed_buffer;
3174 return (ARCHIVE_OK);
3178 seek_pack(struct archive_read *a)
3180 struct _7zip *zip = (struct _7zip *)a->format->data;
3181 int64_t pack_offset;
3183 if (zip->pack_stream_remaining <= 0) {
3184 archive_set_error(&(a->archive),
3185 ARCHIVE_ERRNO_MISC, "Damaged 7-Zip archive");
3186 return (ARCHIVE_FATAL);
3188 zip->pack_stream_inbytes_remaining =
3189 zip->si.pi.sizes[zip->pack_stream_index];
3190 pack_offset = zip->si.pi.positions[zip->pack_stream_index];
3191 if (zip->stream_offset != pack_offset) {
3192 if (0 > __archive_read_seek(a, pack_offset + zip->seek_base,
3194 return (ARCHIVE_FATAL);
3195 zip->stream_offset = pack_offset;
3197 zip->pack_stream_index++;
3198 zip->pack_stream_remaining--;
3199 return (ARCHIVE_OK);
3203 read_stream(struct archive_read *a, const void **buff, size_t size,
3206 struct _7zip *zip = (struct _7zip *)a->format->data;
3207 uint64_t skip_bytes = 0;
3210 if (zip->uncompressed_buffer_bytes_remaining == 0) {
3211 if (zip->pack_stream_inbytes_remaining > 0) {
3212 r = extract_pack_stream(a, 0);
3215 return (get_uncompressed_data(a, buff, size, minimum));
3216 } else if (zip->folder_outbytes_remaining > 0) {
3217 /* Extract a remaining pack stream. */
3218 r = extract_pack_stream(a, 0);
3221 return (get_uncompressed_data(a, buff, size, minimum));
3224 return (get_uncompressed_data(a, buff, size, minimum));
3227 * Current pack stream has been consumed.
3229 if (zip->pack_stream_remaining == 0) {
3230 if (zip->header_is_being_read) {
3231 /* Invalid sequence. This might happen when
3232 * reading a malformed archive. */
3233 archive_set_error(&(a->archive),
3234 ARCHIVE_ERRNO_MISC, "Malformed 7-Zip archive");
3235 return (ARCHIVE_FATAL);
3239 * All current folder's pack streams have been
3240 * consumed. Switch to next folder.
3242 if (zip->folder_index == 0 &&
3243 (zip->si.ci.folders[zip->entry->folderIndex].skipped_bytes
3244 || zip->folder_index != zip->entry->folderIndex)) {
3245 zip->folder_index = zip->entry->folderIndex;
3247 zip->si.ci.folders[zip->folder_index].skipped_bytes;
3250 if (zip->folder_index >= zip->si.ci.numFolders) {
3252 * We have consumed all folders and its pack streams.
3257 r = setup_decode_folder(a,
3258 &(zip->si.ci.folders[zip->folder_index]), 0);
3259 if (r != ARCHIVE_OK)
3260 return (ARCHIVE_FATAL);
3262 zip->folder_index++;
3266 * Switch to next pack stream.
3272 /* Extract a new pack stream. */
3273 r = extract_pack_stream(a, 0);
3278 * Skip the bytes we already has skipped in skip_stream().
3280 while (skip_bytes) {
3283 if (zip->uncompressed_buffer_bytes_remaining == 0) {
3284 if (zip->pack_stream_inbytes_remaining > 0) {
3285 r = extract_pack_stream(a, 0);
3288 } else if (zip->folder_outbytes_remaining > 0) {
3289 /* Extract a remaining pack stream. */
3290 r = extract_pack_stream(a, 0);
3294 archive_set_error(&a->archive,
3295 ARCHIVE_ERRNO_FILE_FORMAT,
3296 "Truncated 7-Zip file body");
3297 return (ARCHIVE_FATAL);
3300 skipped = get_uncompressed_data(
3301 a, buff, (size_t)skip_bytes, 0);
3304 skip_bytes -= skipped;
3305 if (zip->pack_stream_bytes_unconsumed)
3309 return (get_uncompressed_data(a, buff, size, minimum));
3313 setup_decode_folder(struct archive_read *a, struct _7z_folder *folder,
3316 struct _7zip *zip = (struct _7zip *)a->format->data;
3317 const struct _7z_coder *coder1, *coder2;
3318 const char *cname = (header)?"archive header":"file content";
3320 int r, found_bcj2 = 0;
3323 * Release the memory which the previous folder used for BCJ2.
3325 for (i = 0; i < 3; i++) {
3326 if (zip->sub_stream_buff[i] != NULL)
3327 free(zip->sub_stream_buff[i]);
3328 zip->sub_stream_buff[i] = NULL;
3332 * Initialize a stream reader.
3334 zip->pack_stream_remaining = (unsigned)folder->numPackedStreams;
3335 zip->pack_stream_index = (unsigned)folder->packIndex;
3336 zip->folder_outbytes_remaining = folder_uncompressed_size(folder);
3337 zip->uncompressed_buffer_bytes_remaining = 0;
3340 * Check coder types.
3342 for (i = 0; i < folder->numCoders; i++) {
3343 switch(folder->coders[i].codec) {
3344 case _7Z_CRYPTO_MAIN_ZIP:
3345 case _7Z_CRYPTO_RAR_29:
3346 case _7Z_CRYPTO_AES_256_SHA_256: {
3347 /* For entry that is associated with this folder, mark
3348 it as encrypted (data+metadata). */
3349 zip->has_encrypted_entries = 1;
3351 archive_entry_set_is_data_encrypted(a->entry, 1);
3352 archive_entry_set_is_metadata_encrypted(a->entry, 1);
3354 archive_set_error(&(a->archive),
3356 "The %s is encrypted, "
3357 "but currently not supported", cname);
3358 return (ARCHIVE_FATAL);
3360 case _7Z_X86_BCJ2: {
3366 /* Now that we've checked for encryption, if there were still no
3367 * encrypted entries found we can say for sure that there are none.
3369 if (zip->has_encrypted_entries == ARCHIVE_READ_FORMAT_ENCRYPTION_DONT_KNOW) {
3370 zip->has_encrypted_entries = 0;
3373 if ((folder->numCoders > 2 && !found_bcj2) || found_bcj2 > 1) {
3374 archive_set_error(&(a->archive),
3376 "The %s is encoded with many filters, "
3377 "but currently not supported", cname);
3378 return (ARCHIVE_FATAL);
3380 coder1 = &(folder->coders[0]);
3381 if (folder->numCoders == 2)
3382 coder2 = &(folder->coders[1]);
3388 * Preparation to decode BCJ2.
3389 * Decoding BCJ2 requires four sources. Those are at least,
3390 * as far as I know, two types of the storage form.
3392 const struct _7z_coder *fc = folder->coders;
3393 static const struct _7z_coder coder_copy = {0, 1, 1, 0, NULL};
3394 const struct _7z_coder *scoder[3] =
3395 {&coder_copy, &coder_copy, &coder_copy};
3398 unsigned char *b[3] = {NULL, NULL, NULL};
3399 uint64_t sunpack[3] ={-1, -1, -1};
3400 size_t s[3] = {0, 0, 0};
3401 int idx[3] = {0, 1, 2};
3403 if (folder->numCoders == 4 && fc[3].codec == _7Z_X86_BCJ2 &&
3404 folder->numInStreams == 7 && folder->numOutStreams == 4 &&
3405 zip->pack_stream_remaining == 4) {
3406 /* Source type 1 made by 7zr or 7z with -m options. */
3407 if (folder->bindPairs[0].inIndex == 5) {
3408 /* The form made by 7zr */
3409 idx[0] = 1; idx[1] = 2; idx[2] = 0;
3410 scoder[1] = &(fc[1]);
3411 scoder[2] = &(fc[0]);
3412 sunpack[1] = folder->unPackSize[1];
3413 sunpack[2] = folder->unPackSize[0];
3417 * NOTE: Some patterns do not work.
3419 * 7z a -m0=BCJ2 -m1=COPY -m2=COPY
3421 * 7z a -m0=BCJ2 -m1=COPY -m2=(any)
3423 * 7z a -m0=BCJ2 -m1=(any) -m2=COPY
3428 * We have to handle this like `pipe' or
3429 * our libarchive7s filter frame work,
3430 * decoding the BCJ2 main stream sequentially,
3431 * m3 -> m2 -> m1 -> BCJ2.
3434 if (fc[0].codec == _7Z_COPY &&
3435 fc[1].codec == _7Z_COPY)
3436 coder1 = &(folder->coders[2]);
3437 else if (fc[0].codec == _7Z_COPY &&
3438 fc[2].codec == _7Z_COPY)
3439 coder1 = &(folder->coders[1]);
3440 else if (fc[1].codec == _7Z_COPY &&
3441 fc[2].codec == _7Z_COPY)
3442 coder1 = &(folder->coders[0]);
3444 archive_set_error(&(a->archive),
3446 "Unsupported form of "
3448 return (ARCHIVE_FATAL);
3452 zip->main_stream_bytes_remaining =
3453 (size_t)folder->unPackSize[2];
3454 } else if (coder2 != NULL && coder2->codec == _7Z_X86_BCJ2 &&
3455 zip->pack_stream_remaining == 4 &&
3456 folder->numInStreams == 5 && folder->numOutStreams == 2) {
3457 /* Source type 0 made by 7z */
3458 zip->main_stream_bytes_remaining =
3459 (size_t)folder->unPackSize[0];
3461 /* We got an unexpected form. */
3462 archive_set_error(&(a->archive),
3464 "Unsupported form of BCJ2 streams");
3465 return (ARCHIVE_FATAL);
3468 /* Skip the main stream at this time. */
3469 if ((r = seek_pack(a)) < 0)
3471 zip->pack_stream_bytes_unconsumed =
3472 (size_t)zip->pack_stream_inbytes_remaining;
3475 /* Read following three sub streams. */
3476 for (i = 0; i < 3; i++) {
3477 const struct _7z_coder *coder = scoder[i];
3479 if ((r = seek_pack(a)) < 0) {
3480 free(b[0]); free(b[1]); free(b[2]);
3484 if (sunpack[i] == (uint64_t)-1)
3485 zip->folder_outbytes_remaining =
3486 zip->pack_stream_inbytes_remaining;
3488 zip->folder_outbytes_remaining = sunpack[i];
3490 r = init_decompression(a, zip, coder, NULL);
3491 if (r != ARCHIVE_OK) {
3492 free(b[0]); free(b[1]); free(b[2]);
3493 return (ARCHIVE_FATAL);
3496 /* Allocate memory for the decoded data of a sub
3498 b[i] = malloc((size_t)zip->folder_outbytes_remaining);
3500 free(b[0]); free(b[1]); free(b[2]);
3501 archive_set_error(&a->archive, ENOMEM,
3502 "No memory for 7-Zip decompression");
3503 return (ARCHIVE_FATAL);
3506 /* Extract a sub stream. */
3507 while (zip->pack_stream_inbytes_remaining > 0) {
3508 r = (int)extract_pack_stream(a, 0);
3510 free(b[0]); free(b[1]); free(b[2]);
3513 bytes = get_uncompressed_data(a, &buff,
3514 zip->uncompressed_buffer_bytes_remaining,
3517 free(b[0]); free(b[1]); free(b[2]);
3518 return ((int)bytes);
3520 memcpy(b[i]+s[i], buff, bytes);
3522 if (zip->pack_stream_bytes_unconsumed)
3527 /* Set the sub streams to the right place. */
3528 for (i = 0; i < 3; i++) {
3529 zip->sub_stream_buff[i] = b[idx[i]];
3530 zip->sub_stream_size[i] = s[idx[i]];
3531 zip->sub_stream_bytes_remaining[i] = s[idx[i]];
3534 /* Allocate memory used for decoded main stream bytes. */
3535 if (zip->tmp_stream_buff == NULL) {
3536 zip->tmp_stream_buff_size = 32 * 1024;
3537 zip->tmp_stream_buff =
3538 malloc(zip->tmp_stream_buff_size);
3539 if (zip->tmp_stream_buff == NULL) {
3540 archive_set_error(&a->archive, ENOMEM,
3541 "No memory for 7-Zip decompression");
3542 return (ARCHIVE_FATAL);
3545 zip->tmp_stream_bytes_avail = 0;
3546 zip->tmp_stream_bytes_remaining = 0;
3547 zip->odd_bcj_size = 0;
3548 zip->bcj2_outPos = 0;
3551 * Reset a stream reader in order to read the main stream
3554 zip->pack_stream_remaining = 1;
3555 zip->pack_stream_index = (unsigned)folder->packIndex;
3556 zip->folder_outbytes_remaining =
3557 folder_uncompressed_size(folder);
3558 zip->uncompressed_buffer_bytes_remaining = 0;
3562 * Initialize the decompressor for the new folder's pack streams.
3564 r = init_decompression(a, zip, coder1, coder2);
3565 if (r != ARCHIVE_OK)
3566 return (ARCHIVE_FATAL);
3567 return (ARCHIVE_OK);
3571 skip_stream(struct archive_read *a, size_t skip_bytes)
3573 struct _7zip *zip = (struct _7zip *)a->format->data;
3575 int64_t skipped_bytes;
3576 size_t bytes = skip_bytes;
3578 if (zip->folder_index == 0) {
3580 * Optimization for a list mode.
3581 * Avoid unnecessary decoding operations.
3583 zip->si.ci.folders[zip->entry->folderIndex].skipped_bytes
3585 return (skip_bytes);
3589 skipped_bytes = read_stream(a, &p, bytes, 0);
3590 if (skipped_bytes < 0)
3591 return (skipped_bytes);
3592 if (skipped_bytes == 0) {
3593 archive_set_error(&a->archive,
3594 ARCHIVE_ERRNO_FILE_FORMAT,
3595 "Truncated 7-Zip file body");
3596 return (ARCHIVE_FATAL);
3598 bytes -= (size_t)skipped_bytes;
3599 if (zip->pack_stream_bytes_unconsumed)
3602 return (skip_bytes);
3606 * Brought from LZMA SDK.
3608 * Bra86.c -- Converter for x86 code (BCJ)
3609 * 2008-10-04 : Igor Pavlov : Public domain
3613 #define Test86MSByte(b) ((b) == 0 || (b) == 0xFF)
3616 x86_Init(struct _7zip *zip)
3619 zip->bcj_prevPosT = (size_t)0 - 1;
3620 zip->bcj_prevMask = 0;
3625 x86_Convert(struct _7zip *zip, uint8_t *data, size_t size)
3627 static const uint8_t kMaskToAllowedStatus[8] = {1, 1, 1, 0, 1, 0, 0, 0};
3628 static const uint8_t kMaskToBitNumber[8] = {0, 1, 2, 2, 3, 3, 3, 3};
3629 size_t bufferPos, prevPosT;
3630 uint32_t ip, prevMask;
3636 prevPosT = zip->bcj_prevPosT;
3637 prevMask = zip->bcj_prevMask;
3641 uint8_t *p = data + bufferPos;
3642 uint8_t *limit = data + size - 4;
3644 for (; p < limit; p++)
3645 if ((*p & 0xFE) == 0xE8)
3647 bufferPos = (size_t)(p - data);
3650 prevPosT = bufferPos - prevPosT;
3654 prevMask = (prevMask << ((int)prevPosT - 1)) & 0x7;
3655 if (prevMask != 0) {
3657 p[4 - kMaskToBitNumber[prevMask]];
3658 if (!kMaskToAllowedStatus[prevMask] ||
3660 prevPosT = bufferPos;
3661 prevMask = ((prevMask << 1) & 0x7) | 1;
3667 prevPosT = bufferPos;
3669 if (Test86MSByte(p[4])) {
3670 uint32_t src = ((uint32_t)p[4] << 24) |
3671 ((uint32_t)p[3] << 16) | ((uint32_t)p[2] << 8) |
3678 dest = src - (ip + (uint32_t)bufferPos);
3681 b_index = kMaskToBitNumber[prevMask] * 8;
3682 b = (uint8_t)(dest >> (24 - b_index));
3683 if (!Test86MSByte(b))
3685 src = dest ^ ((1 << (32 - b_index)) - 1);
3687 p[4] = (uint8_t)(~(((dest >> 24) & 1) - 1));
3688 p[3] = (uint8_t)(dest >> 16);
3689 p[2] = (uint8_t)(dest >> 8);
3690 p[1] = (uint8_t)dest;
3693 prevMask = ((prevMask << 1) & 0x7) | 1;
3697 zip->bcj_prevPosT = prevPosT;
3698 zip->bcj_prevMask = prevMask;
3699 zip->bcj_ip += (uint32_t)bufferPos;
3704 * Brought from LZMA SDK.
3706 * Bcj2.c -- Converter for x86 code (BCJ2)
3707 * 2008-10-04 : Igor Pavlov : Public domain
3711 #define SZ_ERROR_DATA ARCHIVE_FAILED
3713 #define IsJcc(b0, b1) ((b0) == 0x0F && ((b1) & 0xF0) == 0x80)
3714 #define IsJ(b0, b1) ((b1 & 0xFE) == 0xE8 || IsJcc(b0, b1))
3716 #define kNumTopBits 24
3717 #define kTopValue ((uint32_t)1 << kNumTopBits)
3719 #define kNumBitModelTotalBits 11
3720 #define kBitModelTotal (1 << kNumBitModelTotalBits)
3721 #define kNumMoveBits 5
3723 #define RC_READ_BYTE (*buffer++)
3724 #define RC_TEST { if (buffer == bufferLim) return SZ_ERROR_DATA; }
3725 #define RC_INIT2 zip->bcj2_code = 0; zip->bcj2_range = 0xFFFFFFFF; \
3726 { int ii; for (ii = 0; ii < 5; ii++) { RC_TEST; zip->bcj2_code = (zip->bcj2_code << 8) | RC_READ_BYTE; }}
3728 #define NORMALIZE if (zip->bcj2_range < kTopValue) { RC_TEST; zip->bcj2_range <<= 8; zip->bcj2_code = (zip->bcj2_code << 8) | RC_READ_BYTE; }
3730 #define IF_BIT_0(p) ttt = *(p); bound = (zip->bcj2_range >> kNumBitModelTotalBits) * ttt; if (zip->bcj2_code < bound)
3731 #define UPDATE_0(p) zip->bcj2_range = bound; *(p) = (CProb)(ttt + ((kBitModelTotal - ttt) >> kNumMoveBits)); NORMALIZE;
3732 #define UPDATE_1(p) zip->bcj2_range -= bound; zip->bcj2_code -= bound; *(p) = (CProb)(ttt - (ttt >> kNumMoveBits)); NORMALIZE;
3735 Bcj2_Decode(struct _7zip *zip, uint8_t *outBuf, size_t outSize)
3737 size_t inPos = 0, outPos = 0;
3738 const uint8_t *buf0, *buf1, *buf2, *buf3;
3739 size_t size0, size1, size2, size3;
3740 const uint8_t *buffer, *bufferLim;
3743 size0 = zip->tmp_stream_bytes_remaining;
3744 buf0 = zip->tmp_stream_buff + zip->tmp_stream_bytes_avail - size0;
3745 size1 = zip->sub_stream_bytes_remaining[0];
3746 buf1 = zip->sub_stream_buff[0] + zip->sub_stream_size[0] - size1;
3747 size2 = zip->sub_stream_bytes_remaining[1];
3748 buf2 = zip->sub_stream_buff[1] + zip->sub_stream_size[1] - size2;
3749 size3 = zip->sub_stream_bytes_remaining[2];
3750 buf3 = zip->sub_stream_buff[2] + zip->sub_stream_size[2] - size3;
3753 bufferLim = buffer + size3;
3755 if (zip->bcj_state == 0) {
3759 zip->bcj2_prevByte = 0;
3761 i < sizeof(zip->bcj2_p) / sizeof(zip->bcj2_p[0]); i++)
3762 zip->bcj2_p[i] = kBitModelTotal >> 1;
3768 * Gather the odd bytes of a previous call.
3770 for (i = 0; zip->odd_bcj_size > 0 && outPos < outSize; i++) {
3771 outBuf[outPos++] = zip->odd_bcj[i];
3772 zip->odd_bcj_size--;
3776 zip->bcj2_outPos += outPos;
3786 size_t limit = size0 - inPos;
3787 if (outSize - outPos < limit)
3788 limit = outSize - outPos;
3790 if (zip->bcj_state == 1) {
3791 while (limit != 0) {
3792 uint8_t bb = buf0[inPos];
3793 outBuf[outPos++] = bb;
3794 if (IsJ(zip->bcj2_prevByte, bb)) {
3799 zip->bcj2_prevByte = bb;
3804 if (limit == 0 || outPos == outSize)
3811 prob = zip->bcj2_p + zip->bcj2_prevByte;
3813 prob = zip->bcj2_p + 256;
3815 prob = zip->bcj2_p + 257;
3819 zip->bcj2_prevByte = b;
3829 return SZ_ERROR_DATA;
3835 return SZ_ERROR_DATA;
3839 dest = (((uint32_t)v[0] << 24) |
3840 ((uint32_t)v[1] << 16) |
3841 ((uint32_t)v[2] << 8) |
3843 ((uint32_t)zip->bcj2_outPos + (uint32_t)outPos + 4);
3844 out[0] = (uint8_t)dest;
3845 out[1] = (uint8_t)(dest >> 8);
3846 out[2] = (uint8_t)(dest >> 16);
3847 out[3] = zip->bcj2_prevByte = (uint8_t)(dest >> 24);
3849 for (i = 0; i < 4 && outPos < outSize; i++)
3850 outBuf[outPos++] = out[i];
3853 * Save odd bytes which we could not add into
3854 * the output buffer because of out of space.
3856 zip->odd_bcj_size = 4 -i;
3857 for (; i < 4; i++) {
3858 j = i - 4 + (unsigned)zip->odd_bcj_size;
3859 zip->odd_bcj[j] = out[i];
3865 zip->tmp_stream_bytes_remaining -= inPos;
3866 zip->sub_stream_bytes_remaining[0] = size1;
3867 zip->sub_stream_bytes_remaining[1] = size2;
3868 zip->sub_stream_bytes_remaining[2] = bufferLim - buffer;
3869 zip->bcj2_outPos += outPos;
3871 return ((ssize_t)outPos);