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 if (coder2->propertiesSize != 1) {
1090 archive_set_error(&a->archive,
1092 "Invalid Delta parameter");
1093 return (ARCHIVE_FAILED);
1095 filters[fi].id = LZMA_FILTER_DELTA;
1096 memset(&delta_opt, 0, sizeof(delta_opt));
1097 delta_opt.type = LZMA_DELTA_TYPE_BYTE;
1099 (uint32_t)coder2->properties[0] + 1;
1100 filters[fi].options = &delta_opt;
1103 /* Following filters have not been tested yet. */
1105 filters[fi].id = LZMA_FILTER_POWERPC;
1109 filters[fi].id = LZMA_FILTER_IA64;
1113 filters[fi].id = LZMA_FILTER_ARM;
1117 filters[fi].id = LZMA_FILTER_ARMTHUMB;
1121 filters[fi].id = LZMA_FILTER_SPARC;
1125 archive_set_error(&a->archive,
1127 "Unexpected codec ID: %lX", zip->codec2);
1128 return (ARCHIVE_FAILED);
1132 if (zip->codec == _7Z_LZMA2)
1133 filters[fi].id = LZMA_FILTER_LZMA2;
1135 filters[fi].id = LZMA_FILTER_LZMA1;
1136 filters[fi].options = NULL;
1138 r = lzma_properties_decode(&filters[fi], NULL,
1139 coder1->properties, (size_t)coder1->propertiesSize);
1142 return (ARCHIVE_FAILED);
1146 filters[fi].id = LZMA_VLI_UNKNOWN;
1147 filters[fi].options = NULL;
1148 r = lzma_raw_decoder(&(zip->lzstream), filters);
1152 return (ARCHIVE_FAILED);
1154 zip->lzstream_valid = 1;
1155 zip->lzstream.total_in = 0;
1156 zip->lzstream.total_out = 0;
1160 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
1161 "LZMA codec is unsupported");
1162 return (ARCHIVE_FAILED);
1165 #if defined(HAVE_BZLIB_H) && defined(BZ_CONFIG_ERROR)
1166 if (zip->bzstream_valid) {
1167 BZ2_bzDecompressEnd(&(zip->bzstream));
1168 zip->bzstream_valid = 0;
1170 r = BZ2_bzDecompressInit(&(zip->bzstream), 0, 0);
1171 if (r == BZ_MEM_ERROR)
1172 r = BZ2_bzDecompressInit(&(zip->bzstream), 0, 1);
1174 int err = ARCHIVE_ERRNO_MISC;
1175 const char *detail = NULL;
1177 case BZ_PARAM_ERROR:
1178 detail = "invalid setup parameter";
1182 detail = "out of memory";
1184 case BZ_CONFIG_ERROR:
1185 detail = "mis-compiled library";
1188 archive_set_error(&a->archive, err,
1189 "Internal error initializing decompressor: %s",
1190 detail != NULL ? detail : "??");
1191 zip->bzstream_valid = 0;
1192 return (ARCHIVE_FAILED);
1194 zip->bzstream_valid = 1;
1195 zip->bzstream.total_in_lo32 = 0;
1196 zip->bzstream.total_in_hi32 = 0;
1197 zip->bzstream.total_out_lo32 = 0;
1198 zip->bzstream.total_out_hi32 = 0;
1201 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
1202 "BZ2 codec is unsupported");
1203 return (ARCHIVE_FAILED);
1207 if (zip->stream_valid)
1208 r = inflateReset(&(zip->stream));
1210 r = inflateInit2(&(zip->stream),
1211 -15 /* Don't check for zlib header */);
1213 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
1214 "Couldn't initialize zlib stream.");
1215 return (ARCHIVE_FAILED);
1217 zip->stream_valid = 1;
1218 zip->stream.total_in = 0;
1219 zip->stream.total_out = 0;
1222 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
1223 "DEFLATE codec is unsupported");
1224 return (ARCHIVE_FAILED);
1231 if (zip->ppmd7_valid) {
1232 __archive_ppmd7_functions.Ppmd7_Free(
1233 &zip->ppmd7_context);
1234 zip->ppmd7_valid = 0;
1237 if (coder1->propertiesSize < 5) {
1238 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
1239 "Malformed PPMd parameter");
1240 return (ARCHIVE_FAILED);
1242 order = coder1->properties[0];
1243 msize = archive_le32dec(&(coder1->properties[1]));
1244 if (order < PPMD7_MIN_ORDER || order > PPMD7_MAX_ORDER ||
1245 msize < PPMD7_MIN_MEM_SIZE || msize > PPMD7_MAX_MEM_SIZE) {
1246 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
1247 "Malformed PPMd parameter");
1248 return (ARCHIVE_FAILED);
1250 __archive_ppmd7_functions.Ppmd7_Construct(&zip->ppmd7_context);
1251 r = __archive_ppmd7_functions.Ppmd7_Alloc(
1252 &zip->ppmd7_context, msize);
1254 archive_set_error(&a->archive, ENOMEM,
1255 "Coludn't allocate memory for PPMd");
1256 return (ARCHIVE_FATAL);
1258 __archive_ppmd7_functions.Ppmd7_Init(
1259 &zip->ppmd7_context, order);
1260 __archive_ppmd7_functions.Ppmd7z_RangeDec_CreateVTable(
1262 zip->ppmd7_valid = 1;
1263 zip->ppmd7_stat = 0;
1264 zip->ppstream.overconsumed = 0;
1265 zip->ppstream.total_in = 0;
1266 zip->ppstream.total_out = 0;
1277 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
1278 "Unexpected codec ID: %lX", zip->codec);
1279 return (ARCHIVE_FAILED);
1280 case _7Z_CRYPTO_MAIN_ZIP:
1281 case _7Z_CRYPTO_RAR_29:
1282 case _7Z_CRYPTO_AES_256_SHA_256:
1284 archive_entry_set_is_metadata_encrypted(a->entry, 1);
1285 archive_entry_set_is_data_encrypted(a->entry, 1);
1286 zip->has_encrypted_entries = 1;
1288 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
1289 "Crypto codec not supported yet (ID: 0x%lX)", zip->codec);
1290 return (ARCHIVE_FAILED);
1292 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
1293 "Unknown codec ID: %lX", zip->codec);
1294 return (ARCHIVE_FAILED);
1297 return (ARCHIVE_OK);
1301 decompress(struct archive_read *a, struct _7zip *zip,
1302 void *buff, size_t *outbytes, const void *b, size_t *used)
1304 const uint8_t *t_next_in;
1305 uint8_t *t_next_out;
1306 size_t o_avail_in, o_avail_out;
1307 size_t t_avail_in, t_avail_out;
1308 uint8_t *bcj2_next_out;
1309 size_t bcj2_avail_out;
1310 int r, ret = ARCHIVE_OK;
1312 t_avail_in = o_avail_in = *used;
1313 t_avail_out = o_avail_out = *outbytes;
1317 if (zip->codec != _7Z_LZMA2 && zip->codec2 == _7Z_X86) {
1320 /* Do not copy out the BCJ remaining bytes when the output
1321 * buffer size is less than five bytes. */
1322 if (o_avail_in != 0 && t_avail_out < 5 && zip->odd_bcj_size) {
1327 for (i = 0; zip->odd_bcj_size > 0 && t_avail_out; i++) {
1328 *t_next_out++ = zip->odd_bcj[i];
1330 zip->odd_bcj_size--;
1332 if (o_avail_in == 0 || t_avail_out == 0) {
1333 *used = o_avail_in - t_avail_in;
1334 *outbytes = o_avail_out - t_avail_out;
1335 if (o_avail_in == 0)
1341 bcj2_next_out = t_next_out;
1342 bcj2_avail_out = t_avail_out;
1343 if (zip->codec2 == _7Z_X86_BCJ2) {
1345 * Decord a remaining decompressed main stream for BCJ2.
1347 if (zip->tmp_stream_bytes_remaining) {
1349 size_t remaining = zip->tmp_stream_bytes_remaining;
1350 bytes = Bcj2_Decode(zip, t_next_out, t_avail_out);
1352 archive_set_error(&(a->archive),
1354 "BCJ2 conversion Failed");
1355 return (ARCHIVE_FAILED);
1357 zip->main_stream_bytes_remaining -=
1358 remaining - zip->tmp_stream_bytes_remaining;
1359 t_avail_out -= bytes;
1360 if (o_avail_in == 0 || t_avail_out == 0) {
1362 *outbytes = o_avail_out - t_avail_out;
1363 if (o_avail_in == 0 &&
1364 zip->tmp_stream_bytes_remaining)
1368 t_next_out += bytes;
1369 bcj2_next_out = t_next_out;
1370 bcj2_avail_out = t_avail_out;
1372 t_next_out = zip->tmp_stream_buff;
1373 t_avail_out = zip->tmp_stream_buff_size;
1376 switch (zip->codec) {
1380 (t_avail_in > t_avail_out)?t_avail_out:t_avail_in;
1382 memcpy(t_next_out, t_next_in, bytes);
1383 t_avail_in -= bytes;
1384 t_avail_out -= bytes;
1385 if (o_avail_in == 0)
1390 case _7Z_LZMA: case _7Z_LZMA2:
1391 zip->lzstream.next_in = t_next_in;
1392 zip->lzstream.avail_in = t_avail_in;
1393 zip->lzstream.next_out = t_next_out;
1394 zip->lzstream.avail_out = t_avail_out;
1396 r = lzma_code(&(zip->lzstream), LZMA_RUN);
1398 case LZMA_STREAM_END: /* Found end of stream. */
1399 lzma_end(&(zip->lzstream));
1400 zip->lzstream_valid = 0;
1403 case LZMA_OK: /* Decompressor made some progress. */
1406 archive_set_error(&(a->archive),
1408 "Decompression failed(%d)",
1410 return (ARCHIVE_FAILED);
1412 t_avail_in = zip->lzstream.avail_in;
1413 t_avail_out = zip->lzstream.avail_out;
1416 #if defined(HAVE_BZLIB_H) && defined(BZ_CONFIG_ERROR)
1418 zip->bzstream.next_in = (char *)(uintptr_t)t_next_in;
1419 zip->bzstream.avail_in = t_avail_in;
1420 zip->bzstream.next_out = (char *)(uintptr_t)t_next_out;
1421 zip->bzstream.avail_out = t_avail_out;
1422 r = BZ2_bzDecompress(&(zip->bzstream));
1424 case BZ_STREAM_END: /* Found end of stream. */
1425 switch (BZ2_bzDecompressEnd(&(zip->bzstream))) {
1429 archive_set_error(&(a->archive),
1431 "Failed to clean up decompressor");
1432 return (ARCHIVE_FAILED);
1434 zip->bzstream_valid = 0;
1437 case BZ_OK: /* Decompressor made some progress. */
1440 archive_set_error(&(a->archive),
1442 "bzip decompression failed");
1443 return (ARCHIVE_FAILED);
1445 t_avail_in = zip->bzstream.avail_in;
1446 t_avail_out = zip->bzstream.avail_out;
1451 zip->stream.next_in = (Bytef *)(uintptr_t)t_next_in;
1452 zip->stream.avail_in = (uInt)t_avail_in;
1453 zip->stream.next_out = t_next_out;
1454 zip->stream.avail_out = (uInt)t_avail_out;
1455 r = inflate(&(zip->stream), 0);
1457 case Z_STREAM_END: /* Found end of stream. */
1460 case Z_OK: /* Decompressor made some progress.*/
1463 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
1464 "File decompression failed (%d)", r);
1465 return (ARCHIVE_FAILED);
1467 t_avail_in = zip->stream.avail_in;
1468 t_avail_out = zip->stream.avail_out;
1473 uint64_t flush_bytes;
1475 if (!zip->ppmd7_valid || zip->ppmd7_stat < 0 ||
1477 archive_set_error(&(a->archive),
1479 "Decompression internal error");
1480 return (ARCHIVE_FAILED);
1482 zip->ppstream.next_in = t_next_in;
1483 zip->ppstream.avail_in = t_avail_in;
1484 zip->ppstream.next_out = t_next_out;
1485 zip->ppstream.avail_out = t_avail_out;
1486 if (zip->ppmd7_stat == 0) {
1488 zip->bytein.Read = &ppmd_read;
1489 zip->range_dec.Stream = &zip->bytein;
1490 r = __archive_ppmd7_functions.Ppmd7z_RangeDec_Init(
1493 zip->ppmd7_stat = -1;
1494 archive_set_error(&a->archive,
1496 "Failed to initialize PPMd range decorder");
1497 return (ARCHIVE_FAILED);
1499 if (zip->ppstream.overconsumed) {
1500 zip->ppmd7_stat = -1;
1501 return (ARCHIVE_FAILED);
1503 zip->ppmd7_stat = 1;
1506 if (t_avail_in == 0)
1507 /* XXX Flush out remaining decoded data XXX */
1508 flush_bytes = zip->folder_outbytes_remaining;
1515 sym = __archive_ppmd7_functions.Ppmd7_DecodeSymbol(
1516 &(zip->ppmd7_context), &(zip->range_dec.p));
1518 zip->ppmd7_stat = -1;
1519 archive_set_error(&a->archive,
1520 ARCHIVE_ERRNO_FILE_FORMAT,
1521 "Failed to decode PPMd");
1522 return (ARCHIVE_FAILED);
1524 if (zip->ppstream.overconsumed) {
1525 zip->ppmd7_stat = -1;
1526 return (ARCHIVE_FAILED);
1528 *zip->ppstream.next_out++ = (unsigned char)sym;
1529 zip->ppstream.avail_out--;
1530 zip->ppstream.total_out++;
1533 } while (zip->ppstream.avail_out &&
1534 (zip->ppstream.avail_in || flush_bytes));
1536 t_avail_in = (size_t)zip->ppstream.avail_in;
1537 t_avail_out = (size_t)zip->ppstream.avail_out;
1541 archive_set_error(&(a->archive), ARCHIVE_ERRNO_MISC,
1542 "Decompression internal error");
1543 return (ARCHIVE_FAILED);
1545 if (ret != ARCHIVE_OK && ret != ARCHIVE_EOF)
1548 *used = o_avail_in - t_avail_in;
1549 *outbytes = o_avail_out - t_avail_out;
1554 if (zip->codec != _7Z_LZMA2 && zip->codec2 == _7Z_X86) {
1555 size_t l = x86_Convert(zip, buff, *outbytes);
1556 zip->odd_bcj_size = *outbytes - l;
1557 if (zip->odd_bcj_size > 0 && zip->odd_bcj_size <= 4 &&
1558 o_avail_in && ret != ARCHIVE_EOF) {
1559 memcpy(zip->odd_bcj, ((unsigned char *)buff) + l,
1563 zip->odd_bcj_size = 0;
1567 * Decord BCJ2 with a decompressed main stream.
1569 if (zip->codec2 == _7Z_X86_BCJ2) {
1572 zip->tmp_stream_bytes_avail =
1573 zip->tmp_stream_buff_size - t_avail_out;
1574 if (zip->tmp_stream_bytes_avail >
1575 zip->main_stream_bytes_remaining)
1576 zip->tmp_stream_bytes_avail =
1577 zip->main_stream_bytes_remaining;
1578 zip->tmp_stream_bytes_remaining = zip->tmp_stream_bytes_avail;
1579 bytes = Bcj2_Decode(zip, bcj2_next_out, bcj2_avail_out);
1581 archive_set_error(&(a->archive),
1582 ARCHIVE_ERRNO_MISC, "BCJ2 conversion Failed");
1583 return (ARCHIVE_FAILED);
1585 zip->main_stream_bytes_remaining -=
1586 zip->tmp_stream_bytes_avail
1587 - zip->tmp_stream_bytes_remaining;
1588 bcj2_avail_out -= bytes;
1589 *outbytes = o_avail_out - bcj2_avail_out;
1596 free_decompression(struct archive_read *a, struct _7zip *zip)
1600 #if !defined(HAVE_ZLIB_H) &&\
1601 !(defined(HAVE_BZLIB_H) && defined(BZ_CONFIG_ERROR))
1602 (void)a;/* UNUSED */
1605 if (zip->lzstream_valid)
1606 lzma_end(&(zip->lzstream));
1608 #if defined(HAVE_BZLIB_H) && defined(BZ_CONFIG_ERROR)
1609 if (zip->bzstream_valid) {
1610 if (BZ2_bzDecompressEnd(&(zip->bzstream)) != BZ_OK) {
1611 archive_set_error(&a->archive,
1613 "Failed to clean up bzip2 decompressor");
1616 zip->bzstream_valid = 0;
1620 if (zip->stream_valid) {
1621 if (inflateEnd(&(zip->stream)) != Z_OK) {
1622 archive_set_error(&a->archive,
1624 "Failed to clean up zlib decompressor");
1627 zip->stream_valid = 0;
1630 if (zip->ppmd7_valid) {
1631 __archive_ppmd7_functions.Ppmd7_Free(
1632 &zip->ppmd7_context);
1633 zip->ppmd7_valid = 0;
1639 parse_7zip_uint64(struct archive_read *a, uint64_t *val)
1641 const unsigned char *p;
1642 unsigned char avail, mask;
1645 if ((p = header_bytes(a, 1)) == NULL)
1650 for (i = 0; i < 8; i++) {
1652 if ((p = header_bytes(a, 1)) == NULL)
1654 *val |= ((uint64_t)*p) << (8 * i);
1658 *val += ((uint64_t)(avail & (mask -1))) << (8 * i);
1665 read_Bools(struct archive_read *a, unsigned char *data, size_t num)
1667 const unsigned char *p;
1668 unsigned i, mask = 0, avail = 0;
1670 for (i = 0; i < num; i++) {
1672 if ((p = header_bytes(a, 1)) == NULL)
1677 data[i] = (avail & mask)?1:0;
1684 free_Digest(struct _7z_digests *d)
1691 read_Digests(struct archive_read *a, struct _7z_digests *d, size_t num)
1693 const unsigned char *p;
1698 memset(d, 0, sizeof(*d));
1700 d->defineds = malloc(num);
1701 if (d->defineds == NULL)
1706 if ((p = header_bytes(a, 1)) == NULL)
1709 if (read_Bools(a, d->defineds, num) < 0)
1712 /* All are defined */
1713 memset(d->defineds, 1, num);
1715 d->digests = calloc(num, sizeof(*d->digests));
1716 if (d->digests == NULL)
1718 for (i = 0; i < num; i++) {
1719 if (d->defineds[i]) {
1720 if ((p = header_bytes(a, 4)) == NULL)
1722 d->digests[i] = archive_le32dec(p);
1730 free_PackInfo(struct _7z_pack_info *pi)
1733 free(pi->positions);
1734 free_Digest(&(pi->digest));
1738 read_PackInfo(struct archive_read *a, struct _7z_pack_info *pi)
1740 const unsigned char *p;
1743 memset(pi, 0, sizeof(*pi));
1748 if (parse_7zip_uint64(a, &(pi->pos)) < 0)
1752 * Read NumPackStreams.
1754 if (parse_7zip_uint64(a, &(pi->numPackStreams)) < 0)
1756 if (pi->numPackStreams == 0)
1758 if (UMAX_ENTRY < pi->numPackStreams)
1762 * Read PackSizes[num]
1764 if ((p = header_bytes(a, 1)) == NULL)
1767 /* PackSizes[num] are not present. */
1771 pi->sizes = calloc((size_t)pi->numPackStreams, sizeof(uint64_t));
1772 pi->positions = calloc((size_t)pi->numPackStreams, sizeof(uint64_t));
1773 if (pi->sizes == NULL || pi->positions == NULL)
1776 for (i = 0; i < pi->numPackStreams; i++) {
1777 if (parse_7zip_uint64(a, &(pi->sizes[i])) < 0)
1782 * Read PackStreamDigests[num]
1784 if ((p = header_bytes(a, 1)) == NULL)
1787 /* PackStreamDigests[num] are not present. */
1788 pi->digest.defineds =
1789 calloc((size_t)pi->numPackStreams, sizeof(*pi->digest.defineds));
1790 pi->digest.digests =
1791 calloc((size_t)pi->numPackStreams, sizeof(*pi->digest.digests));
1792 if (pi->digest.defineds == NULL || pi->digest.digests == NULL)
1800 if (read_Digests(a, &(pi->digest), (size_t)pi->numPackStreams) < 0)
1804 * Must be marked by kEnd.
1806 if ((p = header_bytes(a, 1)) == NULL)
1814 free_Folder(struct _7z_folder *f)
1819 for (i = 0; i< f->numCoders; i++) {
1820 free(f->coders[i].properties);
1825 free(f->packedStreams);
1826 free(f->unPackSize);
1830 read_Folder(struct archive_read *a, struct _7z_folder *f)
1832 struct _7zip *zip = (struct _7zip *)a->format->data;
1833 const unsigned char *p;
1834 uint64_t numInStreamsTotal = 0;
1835 uint64_t numOutStreamsTotal = 0;
1838 memset(f, 0, sizeof(*f));
1843 if (parse_7zip_uint64(a, &(f->numCoders)) < 0)
1845 if (f->numCoders > 4)
1846 /* Too many coders. */
1849 f->coders = calloc((size_t)f->numCoders, sizeof(*f->coders));
1850 if (f->coders == NULL)
1852 for (i = 0; i< f->numCoders; i++) {
1856 if ((p = header_bytes(a, 1)) == NULL)
1862 * 5: 0 - No Attributes
1863 * 1 - There are Attributes;
1866 codec_size = *p & 0xf;
1867 simple = (*p & 0x10)?0:1;
1870 return (-1);/* Not supported. */
1873 * Read Decompression Method IDs.
1875 if ((p = header_bytes(a, codec_size)) == NULL)
1878 f->coders[i].codec = decode_codec_id(p, codec_size);
1881 f->coders[i].numInStreams = 1;
1882 f->coders[i].numOutStreams = 1;
1884 if (parse_7zip_uint64(
1885 a, &(f->coders[i].numInStreams)) < 0)
1887 if (UMAX_ENTRY < f->coders[i].numInStreams)
1889 if (parse_7zip_uint64(
1890 a, &(f->coders[i].numOutStreams)) < 0)
1892 if (UMAX_ENTRY < f->coders[i].numOutStreams)
1897 if (parse_7zip_uint64(
1898 a, &(f->coders[i].propertiesSize)) < 0)
1900 if ((p = header_bytes(
1901 a, (size_t)f->coders[i].propertiesSize)) == NULL)
1903 f->coders[i].properties =
1904 malloc((size_t)f->coders[i].propertiesSize);
1905 if (f->coders[i].properties == NULL)
1907 memcpy(f->coders[i].properties, p,
1908 (size_t)f->coders[i].propertiesSize);
1911 numInStreamsTotal += f->coders[i].numInStreams;
1912 numOutStreamsTotal += f->coders[i].numOutStreams;
1915 if (numOutStreamsTotal == 0 ||
1916 numInStreamsTotal < numOutStreamsTotal-1)
1919 f->numBindPairs = numOutStreamsTotal - 1;
1920 if (zip->header_bytes_remaining < f->numBindPairs)
1922 if (f->numBindPairs > 0) {
1924 calloc((size_t)f->numBindPairs, sizeof(*f->bindPairs));
1925 if (f->bindPairs == NULL)
1928 f->bindPairs = NULL;
1929 for (i = 0; i < f->numBindPairs; i++) {
1930 if (parse_7zip_uint64(a, &(f->bindPairs[i].inIndex)) < 0)
1932 if (UMAX_ENTRY < f->bindPairs[i].inIndex)
1934 if (parse_7zip_uint64(a, &(f->bindPairs[i].outIndex)) < 0)
1936 if (UMAX_ENTRY < f->bindPairs[i].outIndex)
1940 f->numPackedStreams = numInStreamsTotal - f->numBindPairs;
1942 calloc((size_t)f->numPackedStreams, sizeof(*f->packedStreams));
1943 if (f->packedStreams == NULL)
1945 if (f->numPackedStreams == 1) {
1946 for (i = 0; i < numInStreamsTotal; i++) {
1948 for (j = 0; j < f->numBindPairs; j++) {
1949 if (f->bindPairs[j].inIndex == i)
1952 if (j == f->numBindPairs)
1955 if (i == numInStreamsTotal)
1957 f->packedStreams[0] = i;
1959 for (i = 0; i < f->numPackedStreams; i++) {
1960 if (parse_7zip_uint64(a, &(f->packedStreams[i])) < 0)
1962 if (UMAX_ENTRY < f->packedStreams[i])
1966 f->numInStreams = numInStreamsTotal;
1967 f->numOutStreams = numOutStreamsTotal;
1973 free_CodersInfo(struct _7z_coders_info *ci)
1978 for (i = 0; i < ci->numFolders; i++)
1979 free_Folder(&(ci->folders[i]));
1985 read_CodersInfo(struct archive_read *a, struct _7z_coders_info *ci)
1987 const unsigned char *p;
1988 struct _7z_digests digest;
1991 memset(ci, 0, sizeof(*ci));
1992 memset(&digest, 0, sizeof(digest));
1994 if ((p = header_bytes(a, 1)) == NULL)
2002 if (parse_7zip_uint64(a, &(ci->numFolders)) < 0)
2004 if (UMAX_ENTRY < ci->numFolders)
2010 if ((p = header_bytes(a, 1)) == NULL)
2015 calloc((size_t)ci->numFolders, sizeof(*ci->folders));
2016 if (ci->folders == NULL)
2018 for (i = 0; i < ci->numFolders; i++) {
2019 if (read_Folder(a, &(ci->folders[i])) < 0)
2024 if (parse_7zip_uint64(a, &(ci->dataStreamIndex)) < 0)
2026 if (UMAX_ENTRY < ci->dataStreamIndex)
2028 if (ci->numFolders > 0) {
2029 archive_set_error(&a->archive, -1,
2030 "Malformed 7-Zip archive");
2035 archive_set_error(&a->archive, -1,
2036 "Malformed 7-Zip archive");
2040 if ((p = header_bytes(a, 1)) == NULL)
2042 if (*p != kCodersUnPackSize)
2045 for (i = 0; i < ci->numFolders; i++) {
2046 struct _7z_folder *folder = &(ci->folders[i]);
2049 folder->unPackSize =
2050 calloc((size_t)folder->numOutStreams, sizeof(*folder->unPackSize));
2051 if (folder->unPackSize == NULL)
2053 for (j = 0; j < folder->numOutStreams; j++) {
2054 if (parse_7zip_uint64(a, &(folder->unPackSize[j])) < 0)
2062 if ((p = header_bytes(a, 1)) == NULL)
2068 if (read_Digests(a, &digest, (size_t)ci->numFolders) < 0)
2070 for (i = 0; i < ci->numFolders; i++) {
2071 ci->folders[i].digest_defined = digest.defineds[i];
2072 ci->folders[i].digest = digest.digests[i];
2078 if ((p = header_bytes(a, 1)) == NULL)
2082 free_Digest(&digest);
2085 free_Digest(&digest);
2090 folder_uncompressed_size(struct _7z_folder *f)
2092 int n = (int)f->numOutStreams;
2093 unsigned pairs = (unsigned)f->numBindPairs;
2097 for (i = 0; i < pairs; i++) {
2098 if (f->bindPairs[i].outIndex == (uint64_t)n)
2102 return (f->unPackSize[n]);
2108 free_SubStreamsInfo(struct _7z_substream_info *ss)
2110 free(ss->unpackSizes);
2111 free(ss->digestsDefined);
2116 read_SubStreamsInfo(struct archive_read *a, struct _7z_substream_info *ss,
2117 struct _7z_folder *f, size_t numFolders)
2119 const unsigned char *p;
2121 size_t unpack_streams;
2124 uint32_t numDigests;
2126 memset(ss, 0, sizeof(*ss));
2128 for (i = 0; i < numFolders; i++)
2129 f[i].numUnpackStreams = 1;
2131 if ((p = header_bytes(a, 1)) == NULL)
2135 if (type == kNumUnPackStream) {
2137 for (i = 0; i < numFolders; i++) {
2138 if (parse_7zip_uint64(a, &(f[i].numUnpackStreams)) < 0)
2140 if (UMAX_ENTRY < f[i].numUnpackStreams)
2142 if (unpack_streams > SIZE_MAX - UMAX_ENTRY) {
2145 unpack_streams += (size_t)f[i].numUnpackStreams;
2147 if ((p = header_bytes(a, 1)) == NULL)
2151 unpack_streams = numFolders;
2153 ss->unpack_streams = unpack_streams;
2154 if (unpack_streams) {
2155 ss->unpackSizes = calloc(unpack_streams,
2156 sizeof(*ss->unpackSizes));
2157 ss->digestsDefined = calloc(unpack_streams,
2158 sizeof(*ss->digestsDefined));
2159 ss->digests = calloc(unpack_streams,
2160 sizeof(*ss->digests));
2161 if (ss->unpackSizes == NULL || ss->digestsDefined == NULL ||
2162 ss->digests == NULL)
2166 usizes = ss->unpackSizes;
2167 for (i = 0; i < numFolders; i++) {
2171 if (f[i].numUnpackStreams == 0)
2175 if (type == kSize) {
2176 for (pack = 1; pack < f[i].numUnpackStreams; pack++) {
2177 if (parse_7zip_uint64(a, usizes) < 0)
2182 *usizes++ = folder_uncompressed_size(&f[i]) - sum;
2185 if (type == kSize) {
2186 if ((p = header_bytes(a, 1)) == NULL)
2191 for (i = 0; i < unpack_streams; i++) {
2192 ss->digestsDefined[i] = 0;
2197 for (i = 0; i < numFolders; i++) {
2198 if (f[i].numUnpackStreams != 1 || !f[i].digest_defined)
2199 numDigests += (uint32_t)f[i].numUnpackStreams;
2203 struct _7z_digests tmpDigests;
2204 unsigned char *digestsDefined = ss->digestsDefined;
2205 uint32_t * digests = ss->digests;
2208 memset(&tmpDigests, 0, sizeof(tmpDigests));
2209 if (read_Digests(a, &(tmpDigests), numDigests) < 0) {
2210 free_Digest(&tmpDigests);
2213 for (i = 0; i < numFolders; i++) {
2214 if (f[i].numUnpackStreams == 1 && f[i].digest_defined) {
2215 *digestsDefined++ = 1;
2216 *digests++ = f[i].digest;
2220 for (j = 0; j < f[i].numUnpackStreams;
2223 tmpDigests.defineds[di];
2225 tmpDigests.digests[di];
2229 free_Digest(&tmpDigests);
2230 if ((p = header_bytes(a, 1)) == NULL)
2244 free_StreamsInfo(struct _7z_stream_info *si)
2246 free_PackInfo(&(si->pi));
2247 free_CodersInfo(&(si->ci));
2248 free_SubStreamsInfo(&(si->ss));
2252 read_StreamsInfo(struct archive_read *a, struct _7z_stream_info *si)
2254 struct _7zip *zip = (struct _7zip *)a->format->data;
2255 const unsigned char *p;
2258 memset(si, 0, sizeof(*si));
2260 if ((p = header_bytes(a, 1)) == NULL)
2262 if (*p == kPackInfo) {
2265 if (read_PackInfo(a, &(si->pi)) < 0)
2268 if (si->pi.positions == NULL || si->pi.sizes == NULL)
2271 * Calculate packed stream positions.
2273 packPos = si->pi.pos;
2274 for (i = 0; i < si->pi.numPackStreams; i++) {
2275 si->pi.positions[i] = packPos;
2276 packPos += si->pi.sizes[i];
2277 if (packPos > zip->header_offset)
2280 if ((p = header_bytes(a, 1)) == NULL)
2283 if (*p == kUnPackInfo) {
2285 struct _7z_folder *f;
2287 if (read_CodersInfo(a, &(si->ci)) < 0)
2291 * Calculate packed stream indexes.
2295 for (i = 0; i < si->ci.numFolders; i++) {
2296 f[i].packIndex = packIndex;
2297 packIndex += (uint32_t)f[i].numPackedStreams;
2298 if (packIndex > si->pi.numPackStreams)
2301 if ((p = header_bytes(a, 1)) == NULL)
2305 if (*p == kSubStreamsInfo) {
2306 if (read_SubStreamsInfo(a, &(si->ss),
2307 si->ci.folders, (size_t)si->ci.numFolders) < 0)
2309 if ((p = header_bytes(a, 1)) == NULL)
2322 free_Header(struct _7z_header_info *h)
2324 free(h->emptyStreamBools);
2325 free(h->emptyFileBools);
2331 read_Header(struct archive_read *a, struct _7z_header_info *h,
2332 int check_header_id)
2334 struct _7zip *zip = (struct _7zip *)a->format->data;
2335 const unsigned char *p;
2336 struct _7z_folder *folders;
2337 struct _7z_stream_info *si = &(zip->si);
2338 struct _7zip_entry *entries;
2339 uint32_t folderIndex, indexInFolder;
2341 int eindex, empty_streams, sindex;
2343 if (check_header_id) {
2347 if ((p = header_bytes(a, 1)) == NULL)
2354 * Read ArchiveProperties.
2356 if ((p = header_bytes(a, 1)) == NULL)
2358 if (*p == kArchiveProperties) {
2361 if ((p = header_bytes(a, 1)) == NULL)
2365 if (parse_7zip_uint64(a, &size) < 0)
2368 if ((p = header_bytes(a, 1)) == NULL)
2373 * Read MainStreamsInfo.
2375 if (*p == kMainStreamsInfo) {
2376 if (read_StreamsInfo(a, &(zip->si)) < 0)
2378 if ((p = header_bytes(a, 1)) == NULL)
2387 if (*p != kFilesInfo)
2390 if (parse_7zip_uint64(a, &(zip->numFiles)) < 0)
2392 if (UMAX_ENTRY < zip->numFiles)
2395 zip->entries = calloc((size_t)zip->numFiles, sizeof(*zip->entries));
2396 if (zip->entries == NULL)
2398 entries = zip->entries;
2406 if ((p = header_bytes(a, 1)) == NULL)
2412 if (parse_7zip_uint64(a, &size) < 0)
2414 if (zip->header_bytes_remaining < size)
2420 if (h->emptyStreamBools != NULL)
2422 h->emptyStreamBools = calloc((size_t)zip->numFiles,
2423 sizeof(*h->emptyStreamBools));
2424 if (h->emptyStreamBools == NULL)
2427 a, h->emptyStreamBools, (size_t)zip->numFiles) < 0)
2430 for (i = 0; i < zip->numFiles; i++) {
2431 if (h->emptyStreamBools[i])
2436 if (empty_streams <= 0) {
2437 /* Unexcepted sequence. Skip this. */
2438 if (header_bytes(a, ll) == NULL)
2442 if (h->emptyFileBools != NULL)
2444 h->emptyFileBools = calloc(empty_streams,
2445 sizeof(*h->emptyFileBools));
2446 if (h->emptyFileBools == NULL)
2448 if (read_Bools(a, h->emptyFileBools, empty_streams) < 0)
2452 if (empty_streams <= 0) {
2453 /* Unexcepted sequence. Skip this. */
2454 if (header_bytes(a, ll) == NULL)
2458 if (h->antiBools != NULL)
2460 h->antiBools = calloc(empty_streams,
2461 sizeof(*h->antiBools));
2462 if (h->antiBools == NULL)
2464 if (read_Bools(a, h->antiBools, empty_streams) < 0)
2470 if (read_Times(a, h, type) < 0)
2478 /* Skip one byte. */
2479 if ((p = header_bytes(a, 1)) == NULL)
2483 if ((ll & 1) || ll < zip->numFiles * 4)
2486 if (zip->entry_names != NULL)
2488 zip->entry_names = malloc(ll);
2489 if (zip->entry_names == NULL)
2491 np = zip->entry_names;
2494 * Copy whole file names.
2495 * NOTE: This loop prevents from expanding
2496 * the uncompressed buffer in order not to
2497 * use extra memory resource.
2501 if (nb > UBUFF_SIZE)
2505 if ((p = header_bytes(a, b)) == NULL)
2511 np = zip->entry_names;
2514 for (i = 0; i < zip->numFiles; i++) {
2515 entries[i].utf16name = np;
2516 #if defined(_WIN32) && !defined(__CYGWIN__) && defined(_DEBUG)
2517 entries[i].wname = (wchar_t *)np;
2520 /* Find a terminator. */
2521 while (nl >= 2 && (np[0] || np[1])) {
2526 return (-1);/* Terminator not found */
2527 entries[i].name_len = np - entries[i].utf16name;
2537 if ((p = header_bytes(a, 2)) == NULL)
2540 if (h->attrBools != NULL)
2542 h->attrBools = calloc((size_t)zip->numFiles,
2543 sizeof(*h->attrBools));
2544 if (h->attrBools == NULL)
2547 memset(h->attrBools, 1, (size_t)zip->numFiles);
2549 if (read_Bools(a, h->attrBools,
2550 (size_t)zip->numFiles) < 0)
2553 for (i = 0; i < zip->numFiles; i++) {
2554 if (h->attrBools[i]) {
2555 if ((p = header_bytes(a, 4)) == NULL)
2557 entries[i].attr = archive_le32dec(p);
2567 if (header_bytes(a, ll) == NULL)
2574 * Set up entry's attributes.
2576 folders = si->ci.folders;
2577 eindex = sindex = 0;
2578 folderIndex = indexInFolder = 0;
2579 for (i = 0; i < zip->numFiles; i++) {
2580 if (h->emptyStreamBools == NULL || h->emptyStreamBools[i] == 0)
2581 entries[i].flg |= HAS_STREAM;
2582 /* The high 16 bits of attributes is a posix file mode. */
2583 entries[i].mode = entries[i].attr >> 16;
2584 if (entries[i].flg & HAS_STREAM) {
2585 if ((size_t)sindex >= si->ss.unpack_streams)
2587 if (entries[i].mode == 0)
2588 entries[i].mode = AE_IFREG | 0666;
2589 if (si->ss.digestsDefined[sindex])
2590 entries[i].flg |= CRC32_IS_SET;
2591 entries[i].ssIndex = sindex;
2595 if (h->emptyFileBools == NULL)
2598 if (h->emptyFileBools[eindex])
2604 if (entries[i].mode == 0) {
2606 entries[i].mode = AE_IFDIR | 0777;
2608 entries[i].mode = AE_IFREG | 0666;
2610 (entries[i].mode & AE_IFMT) != AE_IFDIR) {
2611 entries[i].mode &= ~AE_IFMT;
2612 entries[i].mode |= AE_IFDIR;
2614 if ((entries[i].mode & AE_IFMT) == AE_IFDIR &&
2615 entries[i].name_len >= 2 &&
2616 (entries[i].utf16name[entries[i].name_len-2] != '/' ||
2617 entries[i].utf16name[entries[i].name_len-1] != 0)) {
2618 entries[i].utf16name[entries[i].name_len] = '/';
2619 entries[i].utf16name[entries[i].name_len+1] = 0;
2620 entries[i].name_len += 2;
2622 entries[i].ssIndex = -1;
2624 if (entries[i].attr & 0x01)
2625 entries[i].mode &= ~0222;/* Read only. */
2627 if ((entries[i].flg & HAS_STREAM) == 0 && indexInFolder == 0) {
2629 * The entry is an empty file or a directory file,
2630 * those both have no contents.
2632 entries[i].folderIndex = -1;
2635 if (indexInFolder == 0) {
2637 if (folderIndex >= si->ci.numFolders)
2639 if (folders[folderIndex].numUnpackStreams)
2644 entries[i].folderIndex = folderIndex;
2645 if ((entries[i].flg & HAS_STREAM) == 0)
2648 if (indexInFolder >= folders[folderIndex].numUnpackStreams) {
2657 #define EPOC_TIME ARCHIVE_LITERAL_ULL(116444736000000000)
2659 fileTimeToUtc(uint64_t fileTime, time_t *timep, long *ns)
2662 if (fileTime >= EPOC_TIME) {
2663 fileTime -= EPOC_TIME;
2664 /* milli seconds base */
2665 *timep = (time_t)(fileTime / 10000000);
2666 /* nano seconds base */
2667 *ns = (long)(fileTime % 10000000) * 100;
2675 read_Times(struct archive_read *a, struct _7z_header_info *h, int type)
2677 struct _7zip *zip = (struct _7zip *)a->format->data;
2678 const unsigned char *p;
2679 struct _7zip_entry *entries = zip->entries;
2680 unsigned char *timeBools;
2684 timeBools = calloc((size_t)zip->numFiles, sizeof(*timeBools));
2685 if (timeBools == NULL)
2688 /* Read allAreDefined. */
2689 if ((p = header_bytes(a, 1)) == NULL)
2693 memset(timeBools, 1, (size_t)zip->numFiles);
2695 if (read_Bools(a, timeBools, (size_t)zip->numFiles) < 0)
2699 /* Read external. */
2700 if ((p = header_bytes(a, 1)) == NULL)
2703 if (parse_7zip_uint64(a, &(h->dataIndex)) < 0)
2705 if (UMAX_ENTRY < h->dataIndex)
2709 for (i = 0; i < zip->numFiles; i++) {
2712 if ((p = header_bytes(a, 8)) == NULL)
2716 fileTimeToUtc(archive_le64dec(p),
2717 &(entries[i].ctime),
2718 &(entries[i].ctime_ns));
2719 entries[i].flg |= CTIME_IS_SET;
2722 fileTimeToUtc(archive_le64dec(p),
2723 &(entries[i].atime),
2724 &(entries[i].atime_ns));
2725 entries[i].flg |= ATIME_IS_SET;
2728 fileTimeToUtc(archive_le64dec(p),
2729 &(entries[i].mtime),
2730 &(entries[i].mtime_ns));
2731 entries[i].flg |= MTIME_IS_SET;
2744 decode_encoded_header_info(struct archive_read *a, struct _7z_stream_info *si)
2746 struct _7zip *zip = (struct _7zip *)a->format->data;
2749 if (read_StreamsInfo(a, si) < 0) {
2750 if (errno == ENOMEM)
2751 archive_set_error(&a->archive, -1,
2752 "Couldn't allocate memory");
2754 archive_set_error(&a->archive, -1,
2755 "Malformed 7-Zip archive");
2756 return (ARCHIVE_FATAL);
2759 if (si->pi.numPackStreams == 0 || si->ci.numFolders == 0) {
2760 archive_set_error(&a->archive, -1, "Malformed 7-Zip archive");
2761 return (ARCHIVE_FATAL);
2764 if (zip->header_offset < si->pi.pos + si->pi.sizes[0] ||
2765 (int64_t)(si->pi.pos + si->pi.sizes[0]) < 0 ||
2766 si->pi.sizes[0] == 0 || (int64_t)si->pi.pos < 0) {
2767 archive_set_error(&a->archive, -1, "Malformed Header offset");
2768 return (ARCHIVE_FATAL);
2771 return (ARCHIVE_OK);
2774 static const unsigned char *
2775 header_bytes(struct archive_read *a, size_t rbytes)
2777 struct _7zip *zip = (struct _7zip *)a->format->data;
2778 const unsigned char *p;
2780 if (zip->header_bytes_remaining < rbytes)
2782 if (zip->pack_stream_bytes_unconsumed)
2785 if (zip->header_is_encoded == 0) {
2786 p = __archive_read_ahead(a, rbytes, NULL);
2789 zip->header_bytes_remaining -= rbytes;
2790 zip->pack_stream_bytes_unconsumed = rbytes;
2795 bytes = read_stream(a, &buff, rbytes, rbytes);
2798 zip->header_bytes_remaining -= bytes;
2802 /* Update checksum */
2803 zip->header_crc32 = crc32(zip->header_crc32, p, (unsigned)rbytes);
2808 slurp_central_directory(struct archive_read *a, struct _7zip *zip,
2809 struct _7z_header_info *header)
2811 const unsigned char *p;
2812 uint64_t next_header_offset;
2813 uint64_t next_header_size;
2814 uint32_t next_header_crc;
2815 ssize_t bytes_avail;
2816 int check_header_crc, r;
2818 if ((p = __archive_read_ahead(a, 32, &bytes_avail)) == NULL)
2819 return (ARCHIVE_FATAL);
2821 if ((p[0] == 'M' && p[1] == 'Z') || memcmp(p, "\x7F\x45LF", 4) == 0) {
2822 /* This is an executable ? Must be self-extracting... */
2823 r = skip_sfx(a, bytes_avail);
2824 if (r < ARCHIVE_WARN)
2826 if ((p = __archive_read_ahead(a, 32, &bytes_avail)) == NULL)
2827 return (ARCHIVE_FATAL);
2829 zip->seek_base += 32;
2831 if (memcmp(p, _7ZIP_SIGNATURE, 6) != 0) {
2832 archive_set_error(&a->archive, -1, "Not 7-Zip archive file");
2833 return (ARCHIVE_FATAL);
2837 if (crc32(0, (const unsigned char *)p + 12, 20)
2838 != archive_le32dec(p + 8)) {
2839 archive_set_error(&a->archive, -1, "Header CRC error");
2840 return (ARCHIVE_FATAL);
2843 next_header_offset = archive_le64dec(p + 12);
2844 next_header_size = archive_le64dec(p + 20);
2845 next_header_crc = archive_le32dec(p + 28);
2847 if (next_header_size == 0)
2848 /* There is no entry in an archive file. */
2849 return (ARCHIVE_EOF);
2851 if (((int64_t)next_header_offset) < 0) {
2852 archive_set_error(&a->archive, -1, "Malformed 7-Zip archive");
2853 return (ARCHIVE_FATAL);
2855 __archive_read_consume(a, 32);
2856 if (next_header_offset != 0) {
2857 if (bytes_avail >= (ssize_t)next_header_offset)
2858 __archive_read_consume(a, next_header_offset);
2859 else if (__archive_read_seek(a,
2860 next_header_offset + zip->seek_base, SEEK_SET) < 0)
2861 return (ARCHIVE_FATAL);
2863 zip->stream_offset = next_header_offset;
2864 zip->header_offset = next_header_offset;
2865 zip->header_bytes_remaining = next_header_size;
2866 zip->header_crc32 = 0;
2867 zip->header_is_encoded = 0;
2868 zip->header_is_being_read = 1;
2869 zip->has_encrypted_entries = 0;
2870 check_header_crc = 1;
2872 if ((p = header_bytes(a, 1)) == NULL) {
2873 archive_set_error(&a->archive,
2874 ARCHIVE_ERRNO_FILE_FORMAT,
2875 "Truncated 7-Zip file body");
2876 return (ARCHIVE_FATAL);
2878 /* Parse ArchiveProperties. */
2880 case kEncodedHeader:
2882 * The archive has an encoded header and we have to decode it
2883 * in order to parse the header correctly.
2885 r = decode_encoded_header_info(a, &(zip->si));
2887 /* Check the EncodedHeader CRC.*/
2888 if (r == 0 && zip->header_crc32 != next_header_crc) {
2889 archive_set_error(&a->archive, -1,
2890 "Damaged 7-Zip archive");
2894 if (zip->si.ci.folders[0].digest_defined)
2895 next_header_crc = zip->si.ci.folders[0].digest;
2897 check_header_crc = 0;
2898 if (zip->pack_stream_bytes_unconsumed)
2900 r = setup_decode_folder(a, zip->si.ci.folders, 1);
2902 zip->header_bytes_remaining =
2903 zip->folder_outbytes_remaining;
2907 /* Clean up StreamsInfo. */
2908 free_StreamsInfo(&(zip->si));
2909 memset(&(zip->si), 0, sizeof(zip->si));
2911 return (ARCHIVE_FATAL);
2912 zip->header_is_encoded = 1;
2913 zip->header_crc32 = 0;
2920 r = read_Header(a, header, zip->header_is_encoded);
2922 if (errno == ENOMEM)
2923 archive_set_error(&a->archive, -1,
2924 "Couldn't allocate memory");
2926 archive_set_error(&a->archive, -1,
2927 "Damaged 7-Zip archive");
2928 return (ARCHIVE_FATAL);
2934 if ((p = header_bytes(a, 1)) == NULL ||*p != kEnd) {
2935 archive_set_error(&a->archive, -1,
2936 "Malformed 7-Zip archive");
2937 return (ARCHIVE_FATAL);
2940 /* Check the Header CRC.*/
2941 if (check_header_crc && zip->header_crc32 != next_header_crc) {
2942 archive_set_error(&a->archive, -1,
2943 "Malformed 7-Zip archive");
2944 return (ARCHIVE_FATAL);
2948 archive_set_error(&a->archive, -1,
2949 "Unexpected Property ID = %X", p[0]);
2950 return (ARCHIVE_FATAL);
2953 /* Clean up variables be used for decoding the archive header */
2954 zip->pack_stream_remaining = 0;
2955 zip->pack_stream_index = 0;
2956 zip->folder_outbytes_remaining = 0;
2957 zip->uncompressed_buffer_bytes_remaining = 0;
2958 zip->pack_stream_bytes_unconsumed = 0;
2959 zip->header_is_being_read = 0;
2961 return (ARCHIVE_OK);
2965 get_uncompressed_data(struct archive_read *a, const void **buff, size_t size,
2968 struct _7zip *zip = (struct _7zip *)a->format->data;
2969 ssize_t bytes_avail;
2971 if (zip->codec == _7Z_COPY && zip->codec2 == (unsigned long)-1) {
2974 *buff = __archive_read_ahead(a, minimum, &bytes_avail);
2975 if (bytes_avail <= 0) {
2976 archive_set_error(&a->archive,
2977 ARCHIVE_ERRNO_FILE_FORMAT,
2978 "Truncated 7-Zip file data");
2979 return (ARCHIVE_FATAL);
2981 if ((size_t)bytes_avail >
2982 zip->uncompressed_buffer_bytes_remaining)
2983 bytes_avail = (ssize_t)
2984 zip->uncompressed_buffer_bytes_remaining;
2985 if ((size_t)bytes_avail > size)
2986 bytes_avail = (ssize_t)size;
2988 zip->pack_stream_bytes_unconsumed = bytes_avail;
2989 } else if (zip->uncompressed_buffer_pointer == NULL) {
2990 /* Decompression has failed. */
2991 archive_set_error(&(a->archive),
2992 ARCHIVE_ERRNO_MISC, "Damaged 7-Zip archive");
2993 return (ARCHIVE_FATAL);
2996 if (minimum > zip->uncompressed_buffer_bytes_remaining) {
2998 * If remaining uncompressed data size is less than
2999 * the minimum size, fill the buffer up to the
3002 if (extract_pack_stream(a, minimum) < 0)
3003 return (ARCHIVE_FATAL);
3005 if (size > zip->uncompressed_buffer_bytes_remaining)
3006 bytes_avail = (ssize_t)
3007 zip->uncompressed_buffer_bytes_remaining;
3009 bytes_avail = (ssize_t)size;
3010 *buff = zip->uncompressed_buffer_pointer;
3011 zip->uncompressed_buffer_pointer += bytes_avail;
3013 zip->uncompressed_buffer_bytes_remaining -= bytes_avail;
3014 return (bytes_avail);
3018 extract_pack_stream(struct archive_read *a, size_t minimum)
3020 struct _7zip *zip = (struct _7zip *)a->format->data;
3021 ssize_t bytes_avail;
3024 if (zip->codec == _7Z_COPY && zip->codec2 == (unsigned long)-1) {
3027 if (__archive_read_ahead(a, minimum, &bytes_avail) == NULL
3028 || bytes_avail <= 0) {
3029 archive_set_error(&a->archive,
3030 ARCHIVE_ERRNO_FILE_FORMAT,
3031 "Truncated 7-Zip file body");
3032 return (ARCHIVE_FATAL);
3034 if (bytes_avail > (ssize_t)zip->pack_stream_inbytes_remaining)
3035 bytes_avail = (ssize_t)zip->pack_stream_inbytes_remaining;
3036 zip->pack_stream_inbytes_remaining -= bytes_avail;
3037 if (bytes_avail > (ssize_t)zip->folder_outbytes_remaining)
3038 bytes_avail = (ssize_t)zip->folder_outbytes_remaining;
3039 zip->folder_outbytes_remaining -= bytes_avail;
3040 zip->uncompressed_buffer_bytes_remaining = bytes_avail;
3041 return (ARCHIVE_OK);
3044 /* If the buffer hasn't been allocated, allocate it now. */
3045 if (zip->uncompressed_buffer == NULL) {
3046 zip->uncompressed_buffer_size = UBUFF_SIZE;
3047 if (zip->uncompressed_buffer_size < minimum) {
3048 zip->uncompressed_buffer_size = minimum + 1023;
3049 zip->uncompressed_buffer_size &= ~0x3ff;
3051 zip->uncompressed_buffer =
3052 malloc(zip->uncompressed_buffer_size);
3053 if (zip->uncompressed_buffer == NULL) {
3054 archive_set_error(&a->archive, ENOMEM,
3055 "No memory for 7-Zip decompression");
3056 return (ARCHIVE_FATAL);
3058 zip->uncompressed_buffer_bytes_remaining = 0;
3059 } else if (zip->uncompressed_buffer_size < minimum ||
3060 zip->uncompressed_buffer_bytes_remaining < minimum) {
3062 * Make sure the uncompressed buffer can have bytes
3063 * at least `minimum' bytes.
3064 * NOTE: This case happen when reading the header.
3067 if (zip->uncompressed_buffer_pointer != 0)
3068 used = zip->uncompressed_buffer_pointer -
3069 zip->uncompressed_buffer;
3072 if (zip->uncompressed_buffer_size < minimum) {
3074 * Expand the uncompressed buffer up to
3080 new_size = minimum + 1023;
3082 p = realloc(zip->uncompressed_buffer, new_size);
3084 archive_set_error(&a->archive, ENOMEM,
3085 "No memory for 7-Zip decompression");
3086 return (ARCHIVE_FATAL);
3088 zip->uncompressed_buffer = (unsigned char *)p;
3089 zip->uncompressed_buffer_size = new_size;
3092 * Move unconsumed bytes to the head.
3095 memmove(zip->uncompressed_buffer,
3096 zip->uncompressed_buffer + used,
3097 zip->uncompressed_buffer_bytes_remaining);
3100 zip->uncompressed_buffer_bytes_remaining = 0;
3101 zip->uncompressed_buffer_pointer = NULL;
3103 size_t bytes_in, bytes_out;
3104 const void *buff_in;
3105 unsigned char *buff_out;
3109 * Note: '1' here is a performance optimization.
3110 * Recall that the decompression layer returns a count of
3111 * available bytes; asking for more than that forces the
3112 * decompressor to combine reads by copying data.
3114 buff_in = __archive_read_ahead(a, 1, &bytes_avail);
3115 if (bytes_avail <= 0) {
3116 archive_set_error(&a->archive,
3117 ARCHIVE_ERRNO_FILE_FORMAT,
3118 "Truncated 7-Zip file body");
3119 return (ARCHIVE_FATAL);
3122 buff_out = zip->uncompressed_buffer
3123 + zip->uncompressed_buffer_bytes_remaining;
3124 bytes_out = zip->uncompressed_buffer_size
3125 - zip->uncompressed_buffer_bytes_remaining;
3126 bytes_in = bytes_avail;
3127 if (bytes_in > zip->pack_stream_inbytes_remaining)
3128 bytes_in = (size_t)zip->pack_stream_inbytes_remaining;
3129 /* Drive decompression. */
3130 r = decompress(a, zip, buff_out, &bytes_out,
3131 buff_in, &bytes_in);
3140 return (ARCHIVE_FATAL);
3142 zip->pack_stream_inbytes_remaining -= bytes_in;
3143 if (bytes_out > zip->folder_outbytes_remaining)
3144 bytes_out = (size_t)zip->folder_outbytes_remaining;
3145 zip->folder_outbytes_remaining -= bytes_out;
3146 zip->uncompressed_buffer_bytes_remaining += bytes_out;
3147 zip->pack_stream_bytes_unconsumed = bytes_in;
3150 * Continue decompression until uncompressed_buffer is full.
3152 if (zip->uncompressed_buffer_bytes_remaining ==
3153 zip->uncompressed_buffer_size)
3155 if (zip->codec2 == _7Z_X86 && zip->odd_bcj_size &&
3156 zip->uncompressed_buffer_bytes_remaining + 5 >
3157 zip->uncompressed_buffer_size)
3159 if (zip->pack_stream_inbytes_remaining == 0 &&
3160 zip->folder_outbytes_remaining == 0)
3162 if (end_of_data || (bytes_in == 0 && bytes_out == 0)) {
3163 archive_set_error(&(a->archive),
3164 ARCHIVE_ERRNO_MISC, "Damaged 7-Zip archive");
3165 return (ARCHIVE_FATAL);
3169 if (zip->uncompressed_buffer_bytes_remaining < minimum) {
3170 archive_set_error(&(a->archive),
3171 ARCHIVE_ERRNO_MISC, "Damaged 7-Zip archive");
3172 return (ARCHIVE_FATAL);
3174 zip->uncompressed_buffer_pointer = zip->uncompressed_buffer;
3175 return (ARCHIVE_OK);
3179 seek_pack(struct archive_read *a)
3181 struct _7zip *zip = (struct _7zip *)a->format->data;
3182 int64_t pack_offset;
3184 if (zip->pack_stream_remaining <= 0) {
3185 archive_set_error(&(a->archive),
3186 ARCHIVE_ERRNO_MISC, "Damaged 7-Zip archive");
3187 return (ARCHIVE_FATAL);
3189 zip->pack_stream_inbytes_remaining =
3190 zip->si.pi.sizes[zip->pack_stream_index];
3191 pack_offset = zip->si.pi.positions[zip->pack_stream_index];
3192 if (zip->stream_offset != pack_offset) {
3193 if (0 > __archive_read_seek(a, pack_offset + zip->seek_base,
3195 return (ARCHIVE_FATAL);
3196 zip->stream_offset = pack_offset;
3198 zip->pack_stream_index++;
3199 zip->pack_stream_remaining--;
3200 return (ARCHIVE_OK);
3204 read_stream(struct archive_read *a, const void **buff, size_t size,
3207 struct _7zip *zip = (struct _7zip *)a->format->data;
3208 uint64_t skip_bytes = 0;
3211 if (zip->uncompressed_buffer_bytes_remaining == 0) {
3212 if (zip->pack_stream_inbytes_remaining > 0) {
3213 r = extract_pack_stream(a, 0);
3216 return (get_uncompressed_data(a, buff, size, minimum));
3217 } else if (zip->folder_outbytes_remaining > 0) {
3218 /* Extract a remaining pack stream. */
3219 r = extract_pack_stream(a, 0);
3222 return (get_uncompressed_data(a, buff, size, minimum));
3225 return (get_uncompressed_data(a, buff, size, minimum));
3228 * Current pack stream has been consumed.
3230 if (zip->pack_stream_remaining == 0) {
3231 if (zip->header_is_being_read) {
3232 /* Invalid sequence. This might happen when
3233 * reading a malformed archive. */
3234 archive_set_error(&(a->archive),
3235 ARCHIVE_ERRNO_MISC, "Malformed 7-Zip archive");
3236 return (ARCHIVE_FATAL);
3240 * All current folder's pack streams have been
3241 * consumed. Switch to next folder.
3243 if (zip->folder_index == 0 &&
3244 (zip->si.ci.folders[zip->entry->folderIndex].skipped_bytes
3245 || zip->folder_index != zip->entry->folderIndex)) {
3246 zip->folder_index = zip->entry->folderIndex;
3248 zip->si.ci.folders[zip->folder_index].skipped_bytes;
3251 if (zip->folder_index >= zip->si.ci.numFolders) {
3253 * We have consumed all folders and its pack streams.
3258 r = setup_decode_folder(a,
3259 &(zip->si.ci.folders[zip->folder_index]), 0);
3260 if (r != ARCHIVE_OK)
3261 return (ARCHIVE_FATAL);
3263 zip->folder_index++;
3267 * Switch to next pack stream.
3273 /* Extract a new pack stream. */
3274 r = extract_pack_stream(a, 0);
3279 * Skip the bytes we already has skipped in skip_stream().
3281 while (skip_bytes) {
3284 if (zip->uncompressed_buffer_bytes_remaining == 0) {
3285 if (zip->pack_stream_inbytes_remaining > 0) {
3286 r = extract_pack_stream(a, 0);
3289 } else if (zip->folder_outbytes_remaining > 0) {
3290 /* Extract a remaining pack stream. */
3291 r = extract_pack_stream(a, 0);
3295 archive_set_error(&a->archive,
3296 ARCHIVE_ERRNO_FILE_FORMAT,
3297 "Truncated 7-Zip file body");
3298 return (ARCHIVE_FATAL);
3301 skipped = get_uncompressed_data(
3302 a, buff, (size_t)skip_bytes, 0);
3305 skip_bytes -= skipped;
3306 if (zip->pack_stream_bytes_unconsumed)
3310 return (get_uncompressed_data(a, buff, size, minimum));
3314 setup_decode_folder(struct archive_read *a, struct _7z_folder *folder,
3317 struct _7zip *zip = (struct _7zip *)a->format->data;
3318 const struct _7z_coder *coder1, *coder2;
3319 const char *cname = (header)?"archive header":"file content";
3321 int r, found_bcj2 = 0;
3324 * Release the memory which the previous folder used for BCJ2.
3326 for (i = 0; i < 3; i++) {
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);