2 * Copyright (c) 2003-2007 Tim Kientzle
3 * Copyright (c) 2011 Andres Mejia
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 #include "archive_platform.h"
35 #include <zlib.h> /* crc32 */
40 #include "archive_crc32.h"
42 #include "archive_endian.h"
43 #include "archive_entry.h"
44 #include "archive_entry_locale.h"
45 #include "archive_ppmd7_private.h"
46 #include "archive_private.h"
47 #include "archive_read_private.h"
49 /* RAR signature, also known as the mark header */
50 #define RAR_SIGNATURE "\x52\x61\x72\x21\x1A\x07\x00"
53 #define MARK_HEAD 0x72
54 #define MAIN_HEAD 0x73
55 #define FILE_HEAD 0x74
56 #define COMM_HEAD 0x75
59 #define PROTECT_HEAD 0x78
60 #define SIGN_HEAD 0x79
61 #define NEWSUB_HEAD 0x7a
62 #define ENDARC_HEAD 0x7b
64 /* Main Header Flags */
65 #define MHD_VOLUME 0x0001
66 #define MHD_COMMENT 0x0002
67 #define MHD_LOCK 0x0004
68 #define MHD_SOLID 0x0008
69 #define MHD_NEWNUMBERING 0x0010
71 #define MHD_PROTECT 0x0040
72 #define MHD_PASSWORD 0x0080
73 #define MHD_FIRSTVOLUME 0x0100
74 #define MHD_ENCRYPTVER 0x0200
76 /* Flags common to all headers */
77 #define HD_MARKDELETION 0x4000
78 #define HD_ADD_SIZE_PRESENT 0x8000
80 /* File Header Flags */
81 #define FHD_SPLIT_BEFORE 0x0001
82 #define FHD_SPLIT_AFTER 0x0002
83 #define FHD_PASSWORD 0x0004
84 #define FHD_COMMENT 0x0008
85 #define FHD_SOLID 0x0010
86 #define FHD_LARGE 0x0100
87 #define FHD_UNICODE 0x0200
88 #define FHD_SALT 0x0400
89 #define FHD_VERSION 0x0800
90 #define FHD_EXTTIME 0x1000
91 #define FHD_EXTFLAGS 0x2000
93 /* File dictionary sizes */
94 #define DICTIONARY_SIZE_64 0x00
95 #define DICTIONARY_SIZE_128 0x20
96 #define DICTIONARY_SIZE_256 0x40
97 #define DICTIONARY_SIZE_512 0x60
98 #define DICTIONARY_SIZE_1024 0x80
99 #define DICTIONARY_SIZE_2048 0xA0
100 #define DICTIONARY_SIZE_4096 0xC0
101 #define FILE_IS_DIRECTORY 0xE0
102 #define DICTIONARY_MASK FILE_IS_DIRECTORY
112 /* Compression Methods */
113 #define COMPRESS_METHOD_STORE 0x30
115 #define COMPRESS_METHOD_FASTEST 0x31
116 #define COMPRESS_METHOD_FAST 0x32
117 #define COMPRESS_METHOD_NORMAL 0x33
119 #define COMPRESS_METHOD_GOOD 0x34
120 #define COMPRESS_METHOD_BEST 0x35
122 #define CRC_POLYNOMIAL 0xEDB88320
124 #define NS_UNIT 10000000
126 #define DICTIONARY_MAX_SIZE 0x400000
128 #define MAINCODE_SIZE 299
129 #define OFFSETCODE_SIZE 60
130 #define LOWOFFSETCODE_SIZE 17
131 #define LENGTHCODE_SIZE 28
132 #define HUFFMAN_TABLE_SIZE \
133 MAINCODE_SIZE + OFFSETCODE_SIZE + LOWOFFSETCODE_SIZE + LENGTHCODE_SIZE
135 #define MAX_SYMBOL_LENGTH 0xF
136 #define MAX_SYMBOLS 20
139 * Considering L1,L2 cache miss and a calling of write system-call,
140 * the best size of the output buffer(uncompressed buffer) is 128K.
141 * If the structure of extracting process is changed, this value
142 * might be researched again.
144 #define UNP_BUFFER_SIZE (128 * 1024)
146 /* Define this here for non-Windows platforms */
147 #if !((defined(__WIN32__) || defined(_WIN32) || defined(__WIN32)) && !defined(__CYGWIN__))
148 #define FILE_ATTRIBUTE_DIRECTORY 0x10
151 /* Fields common to all headers */
160 /* Fields common to all file headers */
161 struct rar_file_header
174 struct huffman_tree_node
179 struct huffman_table_entry
187 struct huffman_tree_node *tree;
189 int numallocatedentries;
193 struct huffman_table_entry *table;
198 unsigned char *window;
203 struct data_block_offsets
206 int64_t start_offset;
212 /* Entries from main RAR header */
214 unsigned long file_crc;
219 /* File header entries */
220 char compression_method;
229 size_t filename_save_size;
230 size_t filename_allocated;
232 /* File header optional entries */
241 /* Fields to help with tracking decompression of files. */
242 int64_t bytes_unconsumed;
243 int64_t bytes_remaining;
244 int64_t bytes_uncopied;
246 int64_t offset_outgoing;
249 unsigned int unp_offset;
250 unsigned int unp_buffer_size;
251 unsigned char *unp_buffer;
252 unsigned int dictionary_size;
253 char start_new_block;
255 unsigned long crc_calculated;
256 int found_first_header;
257 char has_endarc_header;
258 struct data_block_offsets *dbo;
261 char filename_must_match;
264 struct huffman_code maincode;
265 struct huffman_code offsetcode;
266 struct huffman_code lowoffsetcode;
267 struct huffman_code lengthcode;
268 unsigned char lengthtable[HUFFMAN_TABLE_SIZE];
270 char output_last_match;
271 unsigned int lastlength;
272 unsigned int lastoffset;
273 unsigned int oldoffset[4];
274 unsigned int lastlowoffset;
275 unsigned int numlowoffsetrepeats;
277 char start_new_table;
279 /* PPMd Variant H members */
284 CPpmd7 ppmd7_context;
285 CPpmd7z_RangeDec range_dec;
289 * String conversion object.
291 int init_default_conversion;
292 struct archive_string_conv *sconv_default;
293 struct archive_string_conv *opt_sconv;
294 struct archive_string_conv *sconv_utf8;
295 struct archive_string_conv *sconv_utf16be;
301 #define CACHE_TYPE uint64_t
302 #define CACHE_BITS (8 * sizeof(CACHE_TYPE))
304 CACHE_TYPE cache_buffer;
305 /* Indicates how many bits avail in cache_buffer. */
308 const unsigned char *next_in;
312 * Custom field to denote that this archive contains encrypted entries
314 int has_encrypted_entries;
317 static int archive_read_support_format_rar_capabilities(struct archive_read *);
318 static int archive_read_format_rar_has_encrypted_entries(struct archive_read *);
319 static int archive_read_format_rar_bid(struct archive_read *, int);
320 static int archive_read_format_rar_options(struct archive_read *,
321 const char *, const char *);
322 static int archive_read_format_rar_read_header(struct archive_read *,
323 struct archive_entry *);
324 static int archive_read_format_rar_read_data(struct archive_read *,
325 const void **, size_t *, int64_t *);
326 static int archive_read_format_rar_read_data_skip(struct archive_read *a);
327 static int64_t archive_read_format_rar_seek_data(struct archive_read *, int64_t,
329 static int archive_read_format_rar_cleanup(struct archive_read *);
331 /* Support functions */
332 static int read_header(struct archive_read *, struct archive_entry *, char);
333 static time_t get_time(int);
334 static int read_exttime(const char *, struct rar *, const char *);
335 static int read_symlink_stored(struct archive_read *, struct archive_entry *,
336 struct archive_string_conv *);
337 static int read_data_stored(struct archive_read *, const void **, size_t *,
339 static int read_data_compressed(struct archive_read *, const void **, size_t *,
341 static int rar_br_preparation(struct archive_read *, struct rar_br *);
342 static int parse_codes(struct archive_read *);
343 static void free_codes(struct archive_read *);
344 static int read_next_symbol(struct archive_read *, struct huffman_code *);
345 static int create_code(struct archive_read *, struct huffman_code *,
346 unsigned char *, int, char);
347 static int add_value(struct archive_read *, struct huffman_code *, int, int,
349 static int new_node(struct huffman_code *);
350 static int make_table(struct archive_read *, struct huffman_code *);
351 static int make_table_recurse(struct archive_read *, struct huffman_code *, int,
352 struct huffman_table_entry *, int, int);
353 static int64_t expand(struct archive_read *, int64_t);
354 static int copy_from_lzss_window(struct archive_read *, const void **,
356 static const void *rar_read_ahead(struct archive_read *, size_t, ssize_t *);
361 /* Check that the cache buffer has enough bits. */
362 #define rar_br_has(br, n) ((br)->cache_avail >= n)
363 /* Get compressed data by bit. */
364 #define rar_br_bits(br, n) \
365 (((uint32_t)((br)->cache_buffer >> \
366 ((br)->cache_avail - (n)))) & cache_masks[n])
367 #define rar_br_bits_forced(br, n) \
368 (((uint32_t)((br)->cache_buffer << \
369 ((n) - (br)->cache_avail))) & cache_masks[n])
370 /* Read ahead to make sure the cache buffer has enough compressed data we
372 * True : completed, there is enough data in the cache buffer.
373 * False : there is no data in the stream. */
374 #define rar_br_read_ahead(a, br, n) \
375 ((rar_br_has(br, (n)) || rar_br_fillup(a, br)) || rar_br_has(br, (n)))
376 /* Notify how many bits we consumed. */
377 #define rar_br_consume(br, n) ((br)->cache_avail -= (n))
378 #define rar_br_consume_unalined_bits(br) ((br)->cache_avail &= ~7)
380 static const uint32_t cache_masks[] = {
381 0x00000000, 0x00000001, 0x00000003, 0x00000007,
382 0x0000000F, 0x0000001F, 0x0000003F, 0x0000007F,
383 0x000000FF, 0x000001FF, 0x000003FF, 0x000007FF,
384 0x00000FFF, 0x00001FFF, 0x00003FFF, 0x00007FFF,
385 0x0000FFFF, 0x0001FFFF, 0x0003FFFF, 0x0007FFFF,
386 0x000FFFFF, 0x001FFFFF, 0x003FFFFF, 0x007FFFFF,
387 0x00FFFFFF, 0x01FFFFFF, 0x03FFFFFF, 0x07FFFFFF,
388 0x0FFFFFFF, 0x1FFFFFFF, 0x3FFFFFFF, 0x7FFFFFFF,
389 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF
393 * Shift away used bits in the cache data and fill it up with following bits.
394 * Call this when cache buffer does not have enough bits you need.
396 * Returns 1 if the cache buffer is full.
397 * Returns 0 if the cache buffer is not full; input buffer is empty.
400 rar_br_fillup(struct archive_read *a, struct rar_br *br)
402 struct rar *rar = (struct rar *)(a->format->data);
403 int n = CACHE_BITS - br->cache_avail;
408 if (br->avail_in >= 8) {
410 ((uint64_t)br->next_in[0]) << 56 |
411 ((uint64_t)br->next_in[1]) << 48 |
412 ((uint64_t)br->next_in[2]) << 40 |
413 ((uint64_t)br->next_in[3]) << 32 |
414 ((uint32_t)br->next_in[4]) << 24 |
415 ((uint32_t)br->next_in[5]) << 16 |
416 ((uint32_t)br->next_in[6]) << 8 |
417 (uint32_t)br->next_in[7];
420 br->cache_avail += 8 * 8;
421 rar->bytes_unconsumed += 8;
422 rar->bytes_remaining -= 8;
427 if (br->avail_in >= 7) {
429 (br->cache_buffer << 56) |
430 ((uint64_t)br->next_in[0]) << 48 |
431 ((uint64_t)br->next_in[1]) << 40 |
432 ((uint64_t)br->next_in[2]) << 32 |
433 ((uint32_t)br->next_in[3]) << 24 |
434 ((uint32_t)br->next_in[4]) << 16 |
435 ((uint32_t)br->next_in[5]) << 8 |
436 (uint32_t)br->next_in[6];
439 br->cache_avail += 7 * 8;
440 rar->bytes_unconsumed += 7;
441 rar->bytes_remaining -= 7;
446 if (br->avail_in >= 6) {
448 (br->cache_buffer << 48) |
449 ((uint64_t)br->next_in[0]) << 40 |
450 ((uint64_t)br->next_in[1]) << 32 |
451 ((uint32_t)br->next_in[2]) << 24 |
452 ((uint32_t)br->next_in[3]) << 16 |
453 ((uint32_t)br->next_in[4]) << 8 |
454 (uint32_t)br->next_in[5];
457 br->cache_avail += 6 * 8;
458 rar->bytes_unconsumed += 6;
459 rar->bytes_remaining -= 6;
464 /* We have enough compressed data in
465 * the cache buffer.*/
470 if (br->avail_in <= 0) {
472 if (rar->bytes_unconsumed > 0) {
473 /* Consume as much as the decompressor
475 __archive_read_consume(a, rar->bytes_unconsumed);
476 rar->bytes_unconsumed = 0;
478 br->next_in = rar_read_ahead(a, 1, &(br->avail_in));
479 if (br->next_in == NULL)
481 if (br->avail_in == 0)
485 (br->cache_buffer << 8) | *br->next_in++;
487 br->cache_avail += 8;
489 rar->bytes_unconsumed++;
490 rar->bytes_remaining--;
495 rar_br_preparation(struct archive_read *a, struct rar_br *br)
497 struct rar *rar = (struct rar *)(a->format->data);
499 if (rar->bytes_remaining > 0) {
500 br->next_in = rar_read_ahead(a, 1, &(br->avail_in));
501 if (br->next_in == NULL) {
502 archive_set_error(&a->archive,
503 ARCHIVE_ERRNO_FILE_FORMAT,
504 "Truncated RAR file data");
505 return (ARCHIVE_FATAL);
507 if (br->cache_avail == 0)
508 (void)rar_br_fillup(a, br);
513 /* Find last bit set */
515 rar_fls(unsigned int word)
521 word |= (word >> 16);
522 return word - (word >> 1);
526 static inline int64_t
527 lzss_position(struct lzss *lzss)
529 return lzss->position;
533 lzss_mask(struct lzss *lzss)
539 lzss_size(struct lzss *lzss)
541 return lzss->mask + 1;
545 lzss_offset_for_position(struct lzss *lzss, int64_t pos)
547 return (int)(pos & lzss->mask);
550 static inline unsigned char *
551 lzss_pointer_for_position(struct lzss *lzss, int64_t pos)
553 return &lzss->window[lzss_offset_for_position(lzss, pos)];
557 lzss_current_offset(struct lzss *lzss)
559 return lzss_offset_for_position(lzss, lzss->position);
562 static inline uint8_t *
563 lzss_current_pointer(struct lzss *lzss)
565 return lzss_pointer_for_position(lzss, lzss->position);
569 lzss_emit_literal(struct rar *rar, uint8_t literal)
571 *lzss_current_pointer(&rar->lzss) = literal;
572 rar->lzss.position++;
576 lzss_emit_match(struct rar *rar, int offset, int length)
578 int dstoffs = lzss_current_offset(&rar->lzss);
579 int srcoffs = (dstoffs - offset) & lzss_mask(&rar->lzss);
580 int l, li, remaining;
581 unsigned char *d, *s;
584 while (remaining > 0) {
586 if (dstoffs > srcoffs) {
587 if (l > lzss_size(&rar->lzss) - dstoffs)
588 l = lzss_size(&rar->lzss) - dstoffs;
590 if (l > lzss_size(&rar->lzss) - srcoffs)
591 l = lzss_size(&rar->lzss) - srcoffs;
593 d = &(rar->lzss.window[dstoffs]);
594 s = &(rar->lzss.window[srcoffs]);
595 if ((dstoffs + l < srcoffs) || (srcoffs + l < dstoffs))
598 for (li = 0; li < l; li++)
602 dstoffs = (dstoffs + l) & lzss_mask(&(rar->lzss));
603 srcoffs = (srcoffs + l) & lzss_mask(&(rar->lzss));
605 rar->lzss.position += length;
611 struct archive_read *a = ((IByteIn*)p)->a;
612 struct rar *rar = (struct rar *)(a->format->data);
613 struct rar_br *br = &(rar->br);
615 if (!rar_br_read_ahead(a, br, 8))
617 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
618 "Truncated RAR file data");
622 b = rar_br_bits(br, 8);
623 rar_br_consume(br, 8);
628 archive_read_support_format_rar(struct archive *_a)
630 struct archive_read *a = (struct archive_read *)_a;
634 archive_check_magic(_a, ARCHIVE_READ_MAGIC, ARCHIVE_STATE_NEW,
635 "archive_read_support_format_rar");
637 rar = (struct rar *)calloc(sizeof(*rar), 1);
640 archive_set_error(&a->archive, ENOMEM, "Can't allocate rar data");
641 return (ARCHIVE_FATAL);
645 * Until enough data has been read, we cannot tell about
646 * any encrypted entries yet.
648 rar->has_encrypted_entries = ARCHIVE_READ_FORMAT_ENCRYPTION_DONT_KNOW;
650 r = __archive_read_register_format(a,
653 archive_read_format_rar_bid,
654 archive_read_format_rar_options,
655 archive_read_format_rar_read_header,
656 archive_read_format_rar_read_data,
657 archive_read_format_rar_read_data_skip,
658 archive_read_format_rar_seek_data,
659 archive_read_format_rar_cleanup,
660 archive_read_support_format_rar_capabilities,
661 archive_read_format_rar_has_encrypted_entries);
669 archive_read_support_format_rar_capabilities(struct archive_read * a)
671 (void)a; /* UNUSED */
672 return (ARCHIVE_READ_FORMAT_CAPS_ENCRYPT_DATA
673 | ARCHIVE_READ_FORMAT_CAPS_ENCRYPT_METADATA);
677 archive_read_format_rar_has_encrypted_entries(struct archive_read *_a)
679 if (_a && _a->format) {
680 struct rar * rar = (struct rar *)_a->format->data;
682 return rar->has_encrypted_entries;
685 return ARCHIVE_READ_FORMAT_ENCRYPTION_DONT_KNOW;
690 archive_read_format_rar_bid(struct archive_read *a, int best_bid)
694 /* If there's already a bid > 30, we'll never win. */
698 if ((p = __archive_read_ahead(a, 7, NULL)) == NULL)
701 if (memcmp(p, RAR_SIGNATURE, 7) == 0)
704 if ((p[0] == 'M' && p[1] == 'Z') || memcmp(p, "\x7F\x45LF", 4) == 0) {
705 /* This is a PE file */
706 ssize_t offset = 0x10000;
707 ssize_t window = 4096;
709 while (offset + window <= (1024 * 128)) {
710 const char *buff = __archive_read_ahead(a, offset + window, &bytes_avail);
712 /* Remaining bytes are less than window. */
719 while (p + 7 < buff + bytes_avail) {
720 if (memcmp(p, RAR_SIGNATURE, 7) == 0)
731 skip_sfx(struct archive_read *a)
736 ssize_t bytes, window;
740 while (total + window <= (1024 * 128)) {
741 h = __archive_read_ahead(a, window, &bytes);
743 /* Remaining bytes are less than window. */
755 * Scan ahead until we find something that looks
756 * like the RAR header.
759 if (memcmp(p, RAR_SIGNATURE, 7) == 0) {
760 skip = p - (const char *)h;
761 __archive_read_consume(a, skip);
766 skip = p - (const char *)h;
767 __archive_read_consume(a, skip);
771 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
772 "Couldn't find out RAR header");
773 return (ARCHIVE_FATAL);
777 archive_read_format_rar_options(struct archive_read *a,
778 const char *key, const char *val)
781 int ret = ARCHIVE_FAILED;
783 rar = (struct rar *)(a->format->data);
784 if (strcmp(key, "hdrcharset") == 0) {
785 if (val == NULL || val[0] == 0)
786 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
787 "rar: hdrcharset option needs a character-set name");
790 archive_string_conversion_from_charset(
791 &a->archive, val, 0);
792 if (rar->opt_sconv != NULL)
800 /* Note: The "warn" return is just to inform the options
801 * supervisor that we didn't handle it. It will generate
802 * a suitable error if no one used this option. */
803 return (ARCHIVE_WARN);
807 archive_read_format_rar_read_header(struct archive_read *a,
808 struct archive_entry *entry)
817 unsigned long crc32_expected;
819 a->archive.archive_format = ARCHIVE_FORMAT_RAR;
820 if (a->archive.archive_format_name == NULL)
821 a->archive.archive_format_name = "RAR";
823 rar = (struct rar *)(a->format->data);
826 * It should be sufficient to call archive_read_next_header() for
827 * a reader to determine if an entry is encrypted or not. If the
828 * encryption of an entry is only detectable when calling
829 * archive_read_data(), so be it. We'll do the same check there
832 if (rar->has_encrypted_entries == ARCHIVE_READ_FORMAT_ENCRYPTION_DONT_KNOW) {
833 rar->has_encrypted_entries = 0;
836 /* RAR files can be generated without EOF headers, so return ARCHIVE_EOF if
839 if ((h = __archive_read_ahead(a, 7, NULL)) == NULL)
840 return (ARCHIVE_EOF);
843 if (rar->found_first_header == 0 &&
844 ((p[0] == 'M' && p[1] == 'Z') || memcmp(p, "\x7F\x45LF", 4) == 0)) {
845 /* This is an executable ? Must be self-extracting... */
847 if (ret < ARCHIVE_WARN)
850 rar->found_first_header = 1;
854 unsigned long crc32_val;
856 if ((h = __archive_read_ahead(a, 7, NULL)) == NULL)
857 return (ARCHIVE_FATAL);
864 if (memcmp(p, RAR_SIGNATURE, 7) != 0) {
865 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
866 "Invalid marker header");
867 return (ARCHIVE_FATAL);
869 __archive_read_consume(a, 7);
873 rar->main_flags = archive_le16dec(p + 3);
874 skip = archive_le16dec(p + 5);
875 if (skip < 7 + sizeof(rar->reserved1) + sizeof(rar->reserved2)) {
876 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
877 "Invalid header size");
878 return (ARCHIVE_FATAL);
880 if ((h = __archive_read_ahead(a, skip, NULL)) == NULL)
881 return (ARCHIVE_FATAL);
883 memcpy(rar->reserved1, p + 7, sizeof(rar->reserved1));
884 memcpy(rar->reserved2, p + 7 + sizeof(rar->reserved1),
885 sizeof(rar->reserved2));
886 if (rar->main_flags & MHD_ENCRYPTVER) {
887 if (skip < 7 + sizeof(rar->reserved1) + sizeof(rar->reserved2)+1) {
888 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
889 "Invalid header size");
890 return (ARCHIVE_FATAL);
892 rar->encryptver = *(p + 7 + sizeof(rar->reserved1) +
893 sizeof(rar->reserved2));
896 /* Main header is password encrypted, so we cannot read any
897 file names or any other info about files from the header. */
898 if (rar->main_flags & MHD_PASSWORD)
900 archive_entry_set_is_metadata_encrypted(entry, 1);
901 archive_entry_set_is_data_encrypted(entry, 1);
902 rar->has_encrypted_entries = 1;
903 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
904 "RAR encryption support unavailable.");
905 return (ARCHIVE_FATAL);
908 crc32_val = crc32(0, (const unsigned char *)p + 2, (unsigned)skip - 2);
909 if ((crc32_val & 0xffff) != archive_le16dec(p)) {
910 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
912 return (ARCHIVE_FATAL);
914 __archive_read_consume(a, skip);
918 return read_header(a, entry, head_type);
926 flags = archive_le16dec(p + 3);
927 skip = archive_le16dec(p + 5);
929 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
930 "Invalid header size too small");
931 return (ARCHIVE_FATAL);
933 if (flags & HD_ADD_SIZE_PRESENT)
936 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
937 "Invalid header size too small");
938 return (ARCHIVE_FATAL);
940 if ((h = __archive_read_ahead(a, skip, NULL)) == NULL)
941 return (ARCHIVE_FATAL);
943 skip += archive_le32dec(p + 7);
946 /* Skip over the 2-byte CRC at the beginning of the header. */
947 crc32_expected = archive_le16dec(p);
948 __archive_read_consume(a, 2);
951 /* Skim the entire header and compute the CRC. */
954 size_t to_read = skip;
956 if (to_read > 32 * 1024) {
959 if ((h = __archive_read_ahead(a, to_read, &did_read)) == NULL) {
960 return (ARCHIVE_FATAL);
963 crc32_val = crc32(crc32_val, (const unsigned char *)p, (unsigned)did_read);
964 __archive_read_consume(a, did_read);
967 if ((crc32_val & 0xffff) != crc32_expected) {
968 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
970 return (ARCHIVE_FATAL);
972 if (head_type == ENDARC_HEAD)
973 return (ARCHIVE_EOF);
977 if ((ret = read_header(a, entry, head_type)) < ARCHIVE_WARN)
982 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
984 return (ARCHIVE_FATAL);
990 archive_read_format_rar_read_data(struct archive_read *a, const void **buff,
991 size_t *size, int64_t *offset)
993 struct rar *rar = (struct rar *)(a->format->data);
996 if (rar->has_encrypted_entries == ARCHIVE_READ_FORMAT_ENCRYPTION_DONT_KNOW) {
997 rar->has_encrypted_entries = 0;
1000 if (rar->bytes_unconsumed > 0) {
1001 /* Consume as much as the decompressor actually used. */
1002 __archive_read_consume(a, rar->bytes_unconsumed);
1003 rar->bytes_unconsumed = 0;
1007 if (rar->entry_eof || rar->offset_seek >= rar->unp_size) {
1009 *offset = rar->offset;
1010 if (*offset < rar->unp_size)
1011 *offset = rar->unp_size;
1012 return (ARCHIVE_EOF);
1015 switch (rar->compression_method)
1017 case COMPRESS_METHOD_STORE:
1018 ret = read_data_stored(a, buff, size, offset);
1021 case COMPRESS_METHOD_FASTEST:
1022 case COMPRESS_METHOD_FAST:
1023 case COMPRESS_METHOD_NORMAL:
1024 case COMPRESS_METHOD_GOOD:
1025 case COMPRESS_METHOD_BEST:
1026 ret = read_data_compressed(a, buff, size, offset);
1027 if (ret != ARCHIVE_OK && ret != ARCHIVE_WARN) {
1028 __archive_ppmd7_functions.Ppmd7_Free(&rar->ppmd7_context);
1029 rar->start_new_table = 1;
1034 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
1035 "Unsupported compression method for RAR file.");
1036 ret = ARCHIVE_FATAL;
1043 archive_read_format_rar_read_data_skip(struct archive_read *a)
1046 int64_t bytes_skipped;
1049 rar = (struct rar *)(a->format->data);
1051 if (rar->bytes_unconsumed > 0) {
1052 /* Consume as much as the decompressor actually used. */
1053 __archive_read_consume(a, rar->bytes_unconsumed);
1054 rar->bytes_unconsumed = 0;
1057 if (rar->bytes_remaining > 0) {
1058 bytes_skipped = __archive_read_consume(a, rar->bytes_remaining);
1059 if (bytes_skipped < 0)
1060 return (ARCHIVE_FATAL);
1063 /* Compressed data to skip must be read from each header in a multivolume
1066 if (rar->main_flags & MHD_VOLUME && rar->file_flags & FHD_SPLIT_AFTER)
1068 ret = archive_read_format_rar_read_header(a, a->entry);
1069 if (ret == (ARCHIVE_EOF))
1070 ret = archive_read_format_rar_read_header(a, a->entry);
1071 if (ret != (ARCHIVE_OK))
1073 return archive_read_format_rar_read_data_skip(a);
1076 return (ARCHIVE_OK);
1080 archive_read_format_rar_seek_data(struct archive_read *a, int64_t offset,
1083 int64_t client_offset, ret;
1085 struct rar *rar = (struct rar *)(a->format->data);
1087 if (rar->compression_method == COMPRESS_METHOD_STORE)
1089 /* Modify the offset for use with SEEK_SET */
1093 client_offset = rar->offset_seek;
1096 client_offset = rar->unp_size;
1102 client_offset += offset;
1103 if (client_offset < 0)
1105 /* Can't seek past beginning of data block */
1108 else if (client_offset > rar->unp_size)
1111 * Set the returned offset but only seek to the end of
1114 rar->offset_seek = client_offset;
1115 client_offset = rar->unp_size;
1118 client_offset += rar->dbo[0].start_offset;
1120 while (i < rar->cursor)
1123 client_offset += rar->dbo[i].start_offset - rar->dbo[i-1].end_offset;
1125 if (rar->main_flags & MHD_VOLUME)
1127 /* Find the appropriate offset among the multivolume archive */
1130 if (client_offset < rar->dbo[rar->cursor].start_offset &&
1131 rar->file_flags & FHD_SPLIT_BEFORE)
1133 /* Search backwards for the correct data block */
1134 if (rar->cursor == 0)
1136 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
1137 "Attempt to seek past beginning of RAR data block");
1138 return (ARCHIVE_FAILED);
1141 client_offset -= rar->dbo[rar->cursor+1].start_offset -
1142 rar->dbo[rar->cursor].end_offset;
1143 if (client_offset < rar->dbo[rar->cursor].start_offset)
1145 ret = __archive_read_seek(a, rar->dbo[rar->cursor].start_offset -
1146 rar->dbo[rar->cursor].header_size, SEEK_SET);
1147 if (ret < (ARCHIVE_OK))
1149 ret = archive_read_format_rar_read_header(a, a->entry);
1150 if (ret != (ARCHIVE_OK))
1152 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
1153 "Error during seek of RAR file");
1154 return (ARCHIVE_FAILED);
1159 else if (client_offset > rar->dbo[rar->cursor].end_offset &&
1160 rar->file_flags & FHD_SPLIT_AFTER)
1162 /* Search forward for the correct data block */
1164 if (rar->cursor < rar->nodes &&
1165 client_offset > rar->dbo[rar->cursor].end_offset)
1167 client_offset += rar->dbo[rar->cursor].start_offset -
1168 rar->dbo[rar->cursor-1].end_offset;
1172 ret = __archive_read_seek(a, rar->dbo[rar->cursor].end_offset,
1174 if (ret < (ARCHIVE_OK))
1176 ret = archive_read_format_rar_read_header(a, a->entry);
1177 if (ret == (ARCHIVE_EOF))
1179 rar->has_endarc_header = 1;
1180 ret = archive_read_format_rar_read_header(a, a->entry);
1182 if (ret != (ARCHIVE_OK))
1184 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
1185 "Error during seek of RAR file");
1186 return (ARCHIVE_FAILED);
1188 client_offset += rar->dbo[rar->cursor].start_offset -
1189 rar->dbo[rar->cursor-1].end_offset;
1196 ret = __archive_read_seek(a, client_offset, SEEK_SET);
1197 if (ret < (ARCHIVE_OK))
1199 rar->bytes_remaining = rar->dbo[rar->cursor].end_offset - ret;
1204 ret -= rar->dbo[i+1].start_offset - rar->dbo[i].end_offset;
1206 ret -= rar->dbo[0].start_offset;
1208 /* Always restart reading the file after a seek */
1209 __archive_reset_read_data(&a->archive);
1211 rar->bytes_unconsumed = 0;
1215 * If a seek past the end of file was requested, return the requested
1218 if (ret == rar->unp_size && rar->offset_seek > rar->unp_size)
1219 return rar->offset_seek;
1221 /* Return the new offset */
1222 rar->offset_seek = ret;
1223 return rar->offset_seek;
1227 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
1228 "Seeking of compressed RAR files is unsupported");
1230 return (ARCHIVE_FAILED);
1234 archive_read_format_rar_cleanup(struct archive_read *a)
1238 rar = (struct rar *)(a->format->data);
1240 free(rar->filename);
1241 free(rar->filename_save);
1243 free(rar->unp_buffer);
1244 free(rar->lzss.window);
1245 __archive_ppmd7_functions.Ppmd7_Free(&rar->ppmd7_context);
1247 (a->format->data) = NULL;
1248 return (ARCHIVE_OK);
1252 read_header(struct archive_read *a, struct archive_entry *entry,
1256 const char *p, *endp;
1258 struct rar_header rar_header;
1259 struct rar_file_header file_header;
1260 int64_t header_size;
1261 unsigned filename_size, end;
1264 char packed_size[8];
1267 struct archive_string_conv *sconv, *fn_sconv;
1268 unsigned long crc32_val;
1269 int ret = (ARCHIVE_OK), ret2;
1271 rar = (struct rar *)(a->format->data);
1273 /* Setup a string conversion object for non-rar-unicode filenames. */
1274 sconv = rar->opt_sconv;
1275 if (sconv == NULL) {
1276 if (!rar->init_default_conversion) {
1277 rar->sconv_default =
1278 archive_string_default_conversion_for_read(
1280 rar->init_default_conversion = 1;
1282 sconv = rar->sconv_default;
1286 if ((h = __archive_read_ahead(a, 7, NULL)) == NULL)
1287 return (ARCHIVE_FATAL);
1289 memcpy(&rar_header, p, sizeof(rar_header));
1290 rar->file_flags = archive_le16dec(rar_header.flags);
1291 header_size = archive_le16dec(rar_header.size);
1292 if (header_size < (int64_t)sizeof(file_header) + 7) {
1293 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
1294 "Invalid header size");
1295 return (ARCHIVE_FATAL);
1297 crc32_val = crc32(0, (const unsigned char *)p + 2, 7 - 2);
1298 __archive_read_consume(a, 7);
1300 if (!(rar->file_flags & FHD_SOLID))
1302 rar->compression_method = 0;
1303 rar->packed_size = 0;
1310 memset(&rar->salt, 0, sizeof(rar->salt));
1322 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
1323 "RAR solid archive support unavailable.");
1324 return (ARCHIVE_FATAL);
1327 if ((h = __archive_read_ahead(a, (size_t)header_size - 7, NULL)) == NULL)
1328 return (ARCHIVE_FATAL);
1330 /* File Header CRC check. */
1331 crc32_val = crc32(crc32_val, h, (unsigned)(header_size - 7));
1332 if ((crc32_val & 0xffff) != archive_le16dec(rar_header.crc)) {
1333 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
1334 "Header CRC error");
1335 return (ARCHIVE_FATAL);
1337 /* If no CRC error, Go on parsing File Header. */
1339 endp = p + header_size - 7;
1340 memcpy(&file_header, p, sizeof(file_header));
1341 p += sizeof(file_header);
1343 rar->compression_method = file_header.method;
1345 ttime = archive_le32dec(file_header.file_time);
1346 rar->mtime = get_time(ttime);
1348 rar->file_crc = archive_le32dec(file_header.file_crc);
1350 if (rar->file_flags & FHD_PASSWORD)
1352 archive_entry_set_is_data_encrypted(entry, 1);
1353 rar->has_encrypted_entries = 1;
1354 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
1355 "RAR encryption support unavailable.");
1356 /* Since it is only the data part itself that is encrypted we can at least
1357 extract information about the currently processed entry and don't need
1358 to return ARCHIVE_FATAL here. */
1359 /*return (ARCHIVE_FATAL);*/
1362 if (rar->file_flags & FHD_LARGE)
1364 memcpy(packed_size, file_header.pack_size, 4);
1365 memcpy(packed_size + 4, p, 4); /* High pack size */
1367 memcpy(unp_size, file_header.unp_size, 4);
1368 memcpy(unp_size + 4, p, 4); /* High unpack size */
1370 rar->packed_size = archive_le64dec(&packed_size);
1371 rar->unp_size = archive_le64dec(&unp_size);
1375 rar->packed_size = archive_le32dec(file_header.pack_size);
1376 rar->unp_size = archive_le32dec(file_header.unp_size);
1379 if (rar->packed_size < 0 || rar->unp_size < 0)
1381 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
1382 "Invalid sizes specified.");
1383 return (ARCHIVE_FATAL);
1386 rar->bytes_remaining = rar->packed_size;
1388 /* TODO: RARv3 subblocks contain comments. For now the complete block is
1389 * consumed at the end.
1391 if (head_type == NEWSUB_HEAD) {
1392 size_t distance = p - (const char *)h;
1393 header_size += rar->packed_size;
1394 /* Make sure we have the extended data. */
1395 if ((h = __archive_read_ahead(a, (size_t)header_size - 7, NULL)) == NULL)
1396 return (ARCHIVE_FATAL);
1398 endp = p + header_size - 7;
1402 filename_size = archive_le16dec(file_header.name_size);
1403 if (p + filename_size > endp) {
1404 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
1405 "Invalid filename size");
1406 return (ARCHIVE_FATAL);
1408 if (rar->filename_allocated < filename_size * 2 + 2) {
1410 size_t newsize = filename_size * 2 + 2;
1411 newptr = realloc(rar->filename, newsize);
1412 if (newptr == NULL) {
1413 archive_set_error(&a->archive, ENOMEM,
1414 "Couldn't allocate memory.");
1415 return (ARCHIVE_FATAL);
1417 rar->filename = newptr;
1418 rar->filename_allocated = newsize;
1420 filename = rar->filename;
1421 memcpy(filename, p, filename_size);
1422 filename[filename_size] = '\0';
1423 if (rar->file_flags & FHD_UNICODE)
1425 if (filename_size != strlen(filename))
1427 unsigned char highbyte, flagbits, flagbyte;
1428 unsigned fn_end, offset;
1430 end = filename_size;
1431 fn_end = filename_size * 2;
1433 offset = (unsigned)strlen(filename) + 1;
1434 highbyte = *(p + offset++);
1437 while (offset < end && filename_size < fn_end)
1441 flagbyte = *(p + offset++);
1446 switch((flagbyte >> flagbits) & 3)
1449 filename[filename_size++] = '\0';
1450 filename[filename_size++] = *(p + offset++);
1453 filename[filename_size++] = highbyte;
1454 filename[filename_size++] = *(p + offset++);
1457 filename[filename_size++] = *(p + offset + 1);
1458 filename[filename_size++] = *(p + offset);
1464 uint8_t length = *(p + offset++);
1466 if (length & 0x80) {
1467 extra = *(p + offset++);
1468 high = (char)highbyte;
1471 length = (length & 0x7f) + 2;
1472 while (length && filename_size < fn_end) {
1473 unsigned cp = filename_size >> 1;
1474 filename[filename_size++] = high;
1475 filename[filename_size++] = p[cp] + extra;
1482 if (filename_size > fn_end) {
1483 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
1484 "Invalid filename");
1485 return (ARCHIVE_FATAL);
1487 filename[filename_size++] = '\0';
1489 * Do not increment filename_size here as the computations below
1490 * add the space for the terminating NUL explicitly.
1492 filename[filename_size] = '\0';
1494 /* Decoded unicode form is UTF-16BE, so we have to update a string
1495 * conversion object for it. */
1496 if (rar->sconv_utf16be == NULL) {
1497 rar->sconv_utf16be = archive_string_conversion_from_charset(
1498 &a->archive, "UTF-16BE", 1);
1499 if (rar->sconv_utf16be == NULL)
1500 return (ARCHIVE_FATAL);
1502 fn_sconv = rar->sconv_utf16be;
1505 while (memcmp(strp, "\x00\x00", 2))
1507 if (!memcmp(strp, "\x00\\", 2))
1514 * If FHD_UNICODE is set but no unicode data, this file name form
1515 * is UTF-8, so we have to update a string conversion object for
1518 if (rar->sconv_utf8 == NULL) {
1519 rar->sconv_utf8 = archive_string_conversion_from_charset(
1520 &a->archive, "UTF-8", 1);
1521 if (rar->sconv_utf8 == NULL)
1522 return (ARCHIVE_FATAL);
1524 fn_sconv = rar->sconv_utf8;
1525 while ((strp = strchr(filename, '\\')) != NULL)
1533 while ((strp = strchr(filename, '\\')) != NULL)
1538 /* Split file in multivolume RAR. No more need to process header. */
1539 if (rar->filename_save &&
1540 filename_size == rar->filename_save_size &&
1541 !memcmp(rar->filename, rar->filename_save, filename_size + 1))
1543 __archive_read_consume(a, header_size - 7);
1545 if (rar->cursor >= rar->nodes)
1549 realloc(rar->dbo, sizeof(*rar->dbo) * rar->nodes)) == NULL)
1551 archive_set_error(&a->archive, ENOMEM, "Couldn't allocate memory.");
1552 return (ARCHIVE_FATAL);
1554 rar->dbo[rar->cursor].header_size = header_size;
1555 rar->dbo[rar->cursor].start_offset = -1;
1556 rar->dbo[rar->cursor].end_offset = -1;
1558 if (rar->dbo[rar->cursor].start_offset < 0)
1560 rar->dbo[rar->cursor].start_offset = a->filter->position;
1561 rar->dbo[rar->cursor].end_offset = rar->dbo[rar->cursor].start_offset +
1566 else if (rar->filename_must_match)
1568 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
1569 "Mismatch of file parts split across multi-volume archive");
1570 return (ARCHIVE_FATAL);
1573 rar->filename_save = (char*)realloc(rar->filename_save,
1575 memcpy(rar->filename_save, rar->filename, filename_size + 1);
1576 rar->filename_save_size = filename_size;
1578 /* Set info for seeking */
1580 if ((rar->dbo = calloc(1, sizeof(*rar->dbo))) == NULL)
1582 archive_set_error(&a->archive, ENOMEM, "Couldn't allocate memory.");
1583 return (ARCHIVE_FATAL);
1585 rar->dbo[0].header_size = header_size;
1586 rar->dbo[0].start_offset = -1;
1587 rar->dbo[0].end_offset = -1;
1591 if (rar->file_flags & FHD_SALT)
1594 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
1595 "Invalid header size");
1596 return (ARCHIVE_FATAL);
1598 memcpy(rar->salt, p, 8);
1602 if (rar->file_flags & FHD_EXTTIME) {
1603 if (read_exttime(p, rar, endp) < 0) {
1604 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
1605 "Invalid header size");
1606 return (ARCHIVE_FATAL);
1610 __archive_read_consume(a, header_size - 7);
1611 rar->dbo[0].start_offset = a->filter->position;
1612 rar->dbo[0].end_offset = rar->dbo[0].start_offset + rar->packed_size;
1614 switch(file_header.host_os)
1619 rar->mode = archive_le32dec(file_header.file_attr);
1620 if (rar->mode & FILE_ATTRIBUTE_DIRECTORY)
1621 rar->mode = AE_IFDIR | S_IXUSR | S_IXGRP | S_IXOTH;
1623 rar->mode = AE_IFREG;
1624 rar->mode |= S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH;
1630 rar->mode = archive_le32dec(file_header.file_attr);
1634 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
1635 "Unknown file attributes from RAR file's host OS");
1636 return (ARCHIVE_FATAL);
1639 rar->bytes_uncopied = rar->bytes_unconsumed = 0;
1640 rar->lzss.position = rar->offset = 0;
1641 rar->offset_seek = 0;
1642 rar->dictionary_size = 0;
1643 rar->offset_outgoing = 0;
1644 rar->br.cache_avail = 0;
1645 rar->br.avail_in = 0;
1646 rar->crc_calculated = 0;
1649 rar->is_ppmd_block = 0;
1650 rar->start_new_table = 1;
1651 free(rar->unp_buffer);
1652 rar->unp_buffer = NULL;
1653 rar->unp_offset = 0;
1654 rar->unp_buffer_size = UNP_BUFFER_SIZE;
1655 memset(rar->lengthtable, 0, sizeof(rar->lengthtable));
1656 __archive_ppmd7_functions.Ppmd7_Free(&rar->ppmd7_context);
1657 rar->ppmd_valid = rar->ppmd_eod = 0;
1659 /* Don't set any archive entries for non-file header types */
1660 if (head_type == NEWSUB_HEAD)
1663 archive_entry_set_mtime(entry, rar->mtime, rar->mnsec);
1664 archive_entry_set_ctime(entry, rar->ctime, rar->cnsec);
1665 archive_entry_set_atime(entry, rar->atime, rar->ansec);
1666 archive_entry_set_size(entry, rar->unp_size);
1667 archive_entry_set_mode(entry, rar->mode);
1669 if (archive_entry_copy_pathname_l(entry, filename, filename_size, fn_sconv))
1671 if (errno == ENOMEM)
1673 archive_set_error(&a->archive, ENOMEM,
1674 "Can't allocate memory for Pathname");
1675 return (ARCHIVE_FATAL);
1677 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
1678 "Pathname cannot be converted from %s to current locale.",
1679 archive_string_conversion_charset_name(fn_sconv));
1680 ret = (ARCHIVE_WARN);
1683 if (((rar->mode) & AE_IFMT) == AE_IFLNK)
1685 /* Make sure a symbolic-link file does not have its body. */
1686 rar->bytes_remaining = 0;
1687 archive_entry_set_size(entry, 0);
1689 /* Read a symbolic-link name. */
1690 if ((ret2 = read_symlink_stored(a, entry, sconv)) < (ARCHIVE_WARN))
1696 if (rar->bytes_remaining == 0)
1706 tm.tm_sec = 2 * (ttime & 0x1f);
1707 tm.tm_min = (ttime >> 5) & 0x3f;
1708 tm.tm_hour = (ttime >> 11) & 0x1f;
1709 tm.tm_mday = (ttime >> 16) & 0x1f;
1710 tm.tm_mon = ((ttime >> 21) & 0x0f) - 1;
1711 tm.tm_year = ((ttime >> 25) & 0x7f) + 80;
1717 read_exttime(const char *p, struct rar *rar, const char *endp)
1719 unsigned rmode, flags, rem, j, count;
1727 flags = archive_le16dec(p);
1730 for (i = 3; i >= 0; i--)
1735 rmode = flags >> i * 4;
1742 ttime = archive_le32dec(p);
1743 t = get_time(ttime);
1748 if (p + count > endp)
1750 for (j = 0; j < count; j++)
1752 rem = (((unsigned)(unsigned char)*p) << 16) | (rem >> 8);
1756 nsec = tm->tm_sec + rem / NS_UNIT;
1780 rar->arcnsec = nsec;
1788 read_symlink_stored(struct archive_read *a, struct archive_entry *entry,
1789 struct archive_string_conv *sconv)
1794 int ret = (ARCHIVE_OK);
1796 rar = (struct rar *)(a->format->data);
1797 if ((h = rar_read_ahead(a, (size_t)rar->packed_size, NULL)) == NULL)
1798 return (ARCHIVE_FATAL);
1801 if (archive_entry_copy_symlink_l(entry,
1802 p, (size_t)rar->packed_size, sconv))
1804 if (errno == ENOMEM)
1806 archive_set_error(&a->archive, ENOMEM,
1807 "Can't allocate memory for link");
1808 return (ARCHIVE_FATAL);
1810 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
1811 "link cannot be converted from %s to current locale.",
1812 archive_string_conversion_charset_name(sconv));
1813 ret = (ARCHIVE_WARN);
1815 __archive_read_consume(a, rar->packed_size);
1820 read_data_stored(struct archive_read *a, const void **buff, size_t *size,
1824 ssize_t bytes_avail;
1826 rar = (struct rar *)(a->format->data);
1827 if (rar->bytes_remaining == 0 &&
1828 !(rar->main_flags & MHD_VOLUME && rar->file_flags & FHD_SPLIT_AFTER))
1832 *offset = rar->offset;
1833 if (rar->file_crc != rar->crc_calculated) {
1834 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
1836 return (ARCHIVE_FATAL);
1839 return (ARCHIVE_EOF);
1842 *buff = rar_read_ahead(a, 1, &bytes_avail);
1843 if (bytes_avail <= 0)
1845 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
1846 "Truncated RAR file data");
1847 return (ARCHIVE_FATAL);
1850 *size = bytes_avail;
1851 *offset = rar->offset;
1852 rar->offset += bytes_avail;
1853 rar->offset_seek += bytes_avail;
1854 rar->bytes_remaining -= bytes_avail;
1855 rar->bytes_unconsumed = bytes_avail;
1856 /* Calculate File CRC. */
1857 rar->crc_calculated = crc32(rar->crc_calculated, *buff,
1858 (unsigned)bytes_avail);
1859 return (ARCHIVE_OK);
1863 read_data_compressed(struct archive_read *a, const void **buff, size_t *size,
1867 int64_t start, end, actualend;
1869 int ret = (ARCHIVE_OK), sym, code, lzss_offset, length, i;
1871 rar = (struct rar *)(a->format->data);
1875 return (ARCHIVE_FATAL);
1876 if (rar->ppmd_eod ||
1877 (rar->dictionary_size && rar->offset >= rar->unp_size))
1879 if (rar->unp_offset > 0) {
1881 * We have unprocessed extracted data. write it out.
1883 *buff = rar->unp_buffer;
1884 *size = rar->unp_offset;
1885 *offset = rar->offset_outgoing;
1886 rar->offset_outgoing += *size;
1887 /* Calculate File CRC. */
1888 rar->crc_calculated = crc32(rar->crc_calculated, *buff,
1890 rar->unp_offset = 0;
1891 return (ARCHIVE_OK);
1895 *offset = rar->offset;
1896 if (rar->file_crc != rar->crc_calculated) {
1897 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
1899 return (ARCHIVE_FATAL);
1902 return (ARCHIVE_EOF);
1905 if (!rar->is_ppmd_block && rar->dictionary_size && rar->bytes_uncopied > 0)
1907 if (rar->bytes_uncopied > (rar->unp_buffer_size - rar->unp_offset))
1908 bs = rar->unp_buffer_size - rar->unp_offset;
1910 bs = (size_t)rar->bytes_uncopied;
1911 ret = copy_from_lzss_window(a, buff, rar->offset, (int)bs);
1912 if (ret != ARCHIVE_OK)
1915 rar->bytes_uncopied -= bs;
1916 if (*buff != NULL) {
1917 rar->unp_offset = 0;
1918 *size = rar->unp_buffer_size;
1919 *offset = rar->offset_outgoing;
1920 rar->offset_outgoing += *size;
1921 /* Calculate File CRC. */
1922 rar->crc_calculated = crc32(rar->crc_calculated, *buff,
1929 if (!rar->br.next_in &&
1930 (ret = rar_br_preparation(a, &(rar->br))) < ARCHIVE_WARN)
1932 if (rar->start_new_table && ((ret = parse_codes(a)) < (ARCHIVE_WARN)))
1935 if (rar->is_ppmd_block)
1937 if ((sym = __archive_ppmd7_functions.Ppmd7_DecodeSymbol(
1938 &rar->ppmd7_context, &rar->range_dec.p)) < 0)
1940 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
1942 return (ARCHIVE_FATAL);
1944 if(sym != rar->ppmd_escape)
1946 lzss_emit_literal(rar, sym);
1947 rar->bytes_uncopied++;
1951 if ((code = __archive_ppmd7_functions.Ppmd7_DecodeSymbol(
1952 &rar->ppmd7_context, &rar->range_dec.p)) < 0)
1954 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
1956 return (ARCHIVE_FATAL);
1962 rar->start_new_table = 1;
1963 return read_data_compressed(a, buff, size, offset);
1966 rar->ppmd_eod = 1;/* End Of ppmd Data. */
1970 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
1971 "Parsing filters is unsupported.");
1972 return (ARCHIVE_FAILED);
1976 for (i = 2; i >= 0; i--)
1978 if ((code = __archive_ppmd7_functions.Ppmd7_DecodeSymbol(
1979 &rar->ppmd7_context, &rar->range_dec.p)) < 0)
1981 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
1983 return (ARCHIVE_FATAL);
1985 lzss_offset |= code << (i * 8);
1987 if ((length = __archive_ppmd7_functions.Ppmd7_DecodeSymbol(
1988 &rar->ppmd7_context, &rar->range_dec.p)) < 0)
1990 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
1992 return (ARCHIVE_FATAL);
1994 lzss_emit_match(rar, lzss_offset + 2, length + 32);
1995 rar->bytes_uncopied += length + 32;
1999 if ((length = __archive_ppmd7_functions.Ppmd7_DecodeSymbol(
2000 &rar->ppmd7_context, &rar->range_dec.p)) < 0)
2002 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
2004 return (ARCHIVE_FATAL);
2006 lzss_emit_match(rar, 1, length + 4);
2007 rar->bytes_uncopied += length + 4;
2011 lzss_emit_literal(rar, sym);
2012 rar->bytes_uncopied++;
2018 start = rar->offset;
2019 end = start + rar->dictionary_size;
2020 rar->filterstart = INT64_MAX;
2022 if ((actualend = expand(a, end)) < 0)
2023 return ((int)actualend);
2025 rar->bytes_uncopied = actualend - start;
2026 if (rar->bytes_uncopied == 0) {
2027 /* Broken RAR files cause this case.
2028 * NOTE: If this case were possible on a normal RAR file
2029 * we would find out where it was actually bad and
2030 * what we would do to solve it. */
2031 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
2032 "Internal error extracting RAR file");
2033 return (ARCHIVE_FATAL);
2036 if (rar->bytes_uncopied > (rar->unp_buffer_size - rar->unp_offset))
2037 bs = rar->unp_buffer_size - rar->unp_offset;
2039 bs = (size_t)rar->bytes_uncopied;
2040 ret = copy_from_lzss_window(a, buff, rar->offset, (int)bs);
2041 if (ret != ARCHIVE_OK)
2044 rar->bytes_uncopied -= bs;
2046 * If *buff is NULL, it means unp_buffer is not full.
2047 * So we have to continue extracting a RAR file.
2049 } while (*buff == NULL);
2051 rar->unp_offset = 0;
2052 *size = rar->unp_buffer_size;
2053 *offset = rar->offset_outgoing;
2054 rar->offset_outgoing += *size;
2055 /* Calculate File CRC. */
2056 rar->crc_calculated = crc32(rar->crc_calculated, *buff, (unsigned)*size);
2061 parse_codes(struct archive_read *a)
2063 int i, j, val, n, r;
2064 unsigned char bitlengths[MAX_SYMBOLS], zerocount, ppmd_flags;
2065 unsigned int maxorder;
2066 struct huffman_code precode;
2067 struct rar *rar = (struct rar *)(a->format->data);
2068 struct rar_br *br = &(rar->br);
2072 /* Skip to the next byte */
2073 rar_br_consume_unalined_bits(br);
2075 /* PPMd block flag */
2076 if (!rar_br_read_ahead(a, br, 1))
2077 goto truncated_data;
2078 if ((rar->is_ppmd_block = rar_br_bits(br, 1)) != 0)
2080 rar_br_consume(br, 1);
2081 if (!rar_br_read_ahead(a, br, 7))
2082 goto truncated_data;
2083 ppmd_flags = rar_br_bits(br, 7);
2084 rar_br_consume(br, 7);
2086 /* Memory is allocated in MB */
2087 if (ppmd_flags & 0x20)
2089 if (!rar_br_read_ahead(a, br, 8))
2090 goto truncated_data;
2091 rar->dictionary_size = (rar_br_bits(br, 8) + 1) << 20;
2092 rar_br_consume(br, 8);
2095 if (ppmd_flags & 0x40)
2097 if (!rar_br_read_ahead(a, br, 8))
2098 goto truncated_data;
2099 rar->ppmd_escape = rar->ppmd7_context.InitEsc = rar_br_bits(br, 8);
2100 rar_br_consume(br, 8);
2103 rar->ppmd_escape = 2;
2105 if (ppmd_flags & 0x20)
2107 maxorder = (ppmd_flags & 0x1F) + 1;
2109 maxorder = 16 + (maxorder - 16) * 3;
2113 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
2114 "Truncated RAR file data");
2115 return (ARCHIVE_FATAL);
2118 /* Make sure ppmd7_contest is freed before Ppmd7_Construct
2119 * because reading a broken file cause this abnormal sequence. */
2120 __archive_ppmd7_functions.Ppmd7_Free(&rar->ppmd7_context);
2123 rar->bytein.Read = &ppmd_read;
2124 __archive_ppmd7_functions.PpmdRAR_RangeDec_CreateVTable(&rar->range_dec);
2125 rar->range_dec.Stream = &rar->bytein;
2126 __archive_ppmd7_functions.Ppmd7_Construct(&rar->ppmd7_context);
2128 if (rar->dictionary_size == 0) {
2129 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
2130 "Invalid zero dictionary size");
2131 return (ARCHIVE_FATAL);
2134 if (!__archive_ppmd7_functions.Ppmd7_Alloc(&rar->ppmd7_context,
2135 rar->dictionary_size))
2137 archive_set_error(&a->archive, ENOMEM,
2139 return (ARCHIVE_FATAL);
2141 if (!__archive_ppmd7_functions.PpmdRAR_RangeDec_Init(&rar->range_dec))
2143 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
2144 "Unable to initialize PPMd range decoder");
2145 return (ARCHIVE_FATAL);
2147 __archive_ppmd7_functions.Ppmd7_Init(&rar->ppmd7_context, maxorder);
2148 rar->ppmd_valid = 1;
2152 if (!rar->ppmd_valid) {
2153 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
2154 "Invalid PPMd sequence");
2155 return (ARCHIVE_FATAL);
2157 if (!__archive_ppmd7_functions.PpmdRAR_RangeDec_Init(&rar->range_dec))
2159 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
2160 "Unable to initialize PPMd range decoder");
2161 return (ARCHIVE_FATAL);
2167 rar_br_consume(br, 1);
2169 /* Keep existing table flag */
2170 if (!rar_br_read_ahead(a, br, 1))
2171 goto truncated_data;
2172 if (!rar_br_bits(br, 1))
2173 memset(rar->lengthtable, 0, sizeof(rar->lengthtable));
2174 rar_br_consume(br, 1);
2176 memset(&bitlengths, 0, sizeof(bitlengths));
2177 for (i = 0; i < MAX_SYMBOLS;)
2179 if (!rar_br_read_ahead(a, br, 4))
2180 goto truncated_data;
2181 bitlengths[i++] = rar_br_bits(br, 4);
2182 rar_br_consume(br, 4);
2183 if (bitlengths[i-1] == 0xF)
2185 if (!rar_br_read_ahead(a, br, 4))
2186 goto truncated_data;
2187 zerocount = rar_br_bits(br, 4);
2188 rar_br_consume(br, 4);
2192 for (j = 0; j < zerocount + 2 && i < MAX_SYMBOLS; j++)
2193 bitlengths[i++] = 0;
2198 memset(&precode, 0, sizeof(precode));
2199 r = create_code(a, &precode, bitlengths, MAX_SYMBOLS, MAX_SYMBOL_LENGTH);
2200 if (r != ARCHIVE_OK) {
2202 free(precode.table);
2206 for (i = 0; i < HUFFMAN_TABLE_SIZE;)
2208 if ((val = read_next_symbol(a, &precode)) < 0) {
2210 free(precode.table);
2211 return (ARCHIVE_FATAL);
2215 rar->lengthtable[i] = (rar->lengthtable[i] + val) & 0xF;
2223 free(precode.table);
2224 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
2225 "Internal error extracting RAR file.");
2226 return (ARCHIVE_FATAL);
2230 if (!rar_br_read_ahead(a, br, 3)) {
2232 free(precode.table);
2233 goto truncated_data;
2235 n = rar_br_bits(br, 3) + 3;
2236 rar_br_consume(br, 3);
2238 if (!rar_br_read_ahead(a, br, 7)) {
2240 free(precode.table);
2241 goto truncated_data;
2243 n = rar_br_bits(br, 7) + 11;
2244 rar_br_consume(br, 7);
2247 for (j = 0; j < n && i < HUFFMAN_TABLE_SIZE; j++)
2249 rar->lengthtable[i] = rar->lengthtable[i-1];
2256 if (!rar_br_read_ahead(a, br, 3)) {
2258 free(precode.table);
2259 goto truncated_data;
2261 n = rar_br_bits(br, 3) + 3;
2262 rar_br_consume(br, 3);
2264 if (!rar_br_read_ahead(a, br, 7)) {
2266 free(precode.table);
2267 goto truncated_data;
2269 n = rar_br_bits(br, 7) + 11;
2270 rar_br_consume(br, 7);
2273 for(j = 0; j < n && i < HUFFMAN_TABLE_SIZE; j++)
2274 rar->lengthtable[i++] = 0;
2278 free(precode.table);
2280 r = create_code(a, &rar->maincode, &rar->lengthtable[0], MAINCODE_SIZE,
2282 if (r != ARCHIVE_OK)
2284 r = create_code(a, &rar->offsetcode, &rar->lengthtable[MAINCODE_SIZE],
2285 OFFSETCODE_SIZE, MAX_SYMBOL_LENGTH);
2286 if (r != ARCHIVE_OK)
2288 r = create_code(a, &rar->lowoffsetcode,
2289 &rar->lengthtable[MAINCODE_SIZE + OFFSETCODE_SIZE],
2290 LOWOFFSETCODE_SIZE, MAX_SYMBOL_LENGTH);
2291 if (r != ARCHIVE_OK)
2293 r = create_code(a, &rar->lengthcode,
2294 &rar->lengthtable[MAINCODE_SIZE + OFFSETCODE_SIZE +
2295 LOWOFFSETCODE_SIZE], LENGTHCODE_SIZE, MAX_SYMBOL_LENGTH);
2296 if (r != ARCHIVE_OK)
2300 if (!rar->dictionary_size || !rar->lzss.window)
2302 /* Seems as though dictionary sizes are not used. Even so, minimize
2303 * memory usage as much as possible.
2306 unsigned int new_size;
2308 if (rar->unp_size >= DICTIONARY_MAX_SIZE)
2309 new_size = DICTIONARY_MAX_SIZE;
2311 new_size = rar_fls((unsigned int)rar->unp_size) << 1;
2312 if (new_size == 0) {
2313 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
2314 "Zero window size is invalid.");
2315 return (ARCHIVE_FATAL);
2317 new_window = realloc(rar->lzss.window, new_size);
2318 if (new_window == NULL) {
2319 archive_set_error(&a->archive, ENOMEM,
2320 "Unable to allocate memory for uncompressed data.");
2321 return (ARCHIVE_FATAL);
2323 rar->lzss.window = (unsigned char *)new_window;
2324 rar->dictionary_size = new_size;
2325 memset(rar->lzss.window, 0, rar->dictionary_size);
2326 rar->lzss.mask = rar->dictionary_size - 1;
2329 rar->start_new_table = 0;
2330 return (ARCHIVE_OK);
2332 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
2333 "Truncated RAR file data");
2335 return (ARCHIVE_FATAL);
2339 free_codes(struct archive_read *a)
2341 struct rar *rar = (struct rar *)(a->format->data);
2342 free(rar->maincode.tree);
2343 free(rar->offsetcode.tree);
2344 free(rar->lowoffsetcode.tree);
2345 free(rar->lengthcode.tree);
2346 free(rar->maincode.table);
2347 free(rar->offsetcode.table);
2348 free(rar->lowoffsetcode.table);
2349 free(rar->lengthcode.table);
2350 memset(&rar->maincode, 0, sizeof(rar->maincode));
2351 memset(&rar->offsetcode, 0, sizeof(rar->offsetcode));
2352 memset(&rar->lowoffsetcode, 0, sizeof(rar->lowoffsetcode));
2353 memset(&rar->lengthcode, 0, sizeof(rar->lengthcode));
2358 read_next_symbol(struct archive_read *a, struct huffman_code *code)
2362 int length, value, node;
2368 if (make_table(a, code) != (ARCHIVE_OK))
2372 rar = (struct rar *)(a->format->data);
2375 /* Look ahead (peek) at bits */
2376 if (!rar_br_read_ahead(a, br, code->tablesize)) {
2377 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
2378 "Truncated RAR file data");
2382 bits = rar_br_bits(br, code->tablesize);
2384 length = code->table[bits].length;
2385 value = code->table[bits].value;
2389 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
2390 "Invalid prefix code in bitstream");
2394 if (length <= code->tablesize)
2396 /* Skip length bits */
2397 rar_br_consume(br, length);
2401 /* Skip tablesize bits */
2402 rar_br_consume(br, code->tablesize);
2405 while (!(code->tree[node].branches[0] ==
2406 code->tree[node].branches[1]))
2408 if (!rar_br_read_ahead(a, br, 1)) {
2409 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
2410 "Truncated RAR file data");
2414 bit = rar_br_bits(br, 1);
2415 rar_br_consume(br, 1);
2417 if (code->tree[node].branches[bit] < 0)
2419 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
2420 "Invalid prefix code in bitstream");
2423 node = code->tree[node].branches[bit];
2426 return code->tree[node].branches[0];
2430 create_code(struct archive_read *a, struct huffman_code *code,
2431 unsigned char *lengths, int numsymbols, char maxlength)
2433 int i, j, codebits = 0, symbolsleft = numsymbols;
2435 code->numentries = 0;
2436 code->numallocatedentries = 0;
2437 if (new_node(code) < 0) {
2438 archive_set_error(&a->archive, ENOMEM,
2439 "Unable to allocate memory for node data.");
2440 return (ARCHIVE_FATAL);
2442 code->numentries = 1;
2443 code->minlength = INT_MAX;
2444 code->maxlength = INT_MIN;
2446 for(i = 1; i <= maxlength; i++)
2448 for(j = 0; j < numsymbols; j++)
2450 if (lengths[j] != i) continue;
2451 if (add_value(a, code, j, codebits, i) != ARCHIVE_OK)
2452 return (ARCHIVE_FATAL);
2454 if (--symbolsleft <= 0) { break; break; }
2458 return (ARCHIVE_OK);
2462 add_value(struct archive_read *a, struct huffman_code *code, int value,
2463 int codebits, int length)
2465 int repeatpos, lastnode, bitpos, bit, repeatnode, nextnode;
2470 if(length > code->maxlength)
2471 code->maxlength = length;
2472 if(length < code->minlength)
2473 code->minlength = length;
2476 if (repeatpos == 0 || (repeatpos >= 0
2477 && (((codebits >> (repeatpos - 1)) & 3) == 0
2478 || ((codebits >> (repeatpos - 1)) & 3) == 3)))
2480 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
2481 "Invalid repeat position");
2482 return (ARCHIVE_FATAL);
2486 for (bitpos = length - 1; bitpos >= 0; bitpos--)
2488 bit = (codebits >> bitpos) & 1;
2490 /* Leaf node check */
2491 if (code->tree[lastnode].branches[0] ==
2492 code->tree[lastnode].branches[1])
2494 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
2496 return (ARCHIVE_FATAL);
2499 if (bitpos == repeatpos)
2501 /* Open branch check */
2502 if (!(code->tree[lastnode].branches[bit] < 0))
2504 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
2505 "Invalid repeating code");
2506 return (ARCHIVE_FATAL);
2509 if ((repeatnode = new_node(code)) < 0) {
2510 archive_set_error(&a->archive, ENOMEM,
2511 "Unable to allocate memory for node data.");
2512 return (ARCHIVE_FATAL);
2514 if ((nextnode = new_node(code)) < 0) {
2515 archive_set_error(&a->archive, ENOMEM,
2516 "Unable to allocate memory for node data.");
2517 return (ARCHIVE_FATAL);
2521 code->tree[lastnode].branches[bit] = repeatnode;
2522 code->tree[repeatnode].branches[bit] = repeatnode;
2523 code->tree[repeatnode].branches[bit^1] = nextnode;
2524 lastnode = nextnode;
2526 bitpos++; /* terminating bit already handled, skip it */
2530 /* Open branch check */
2531 if (code->tree[lastnode].branches[bit] < 0)
2533 if (new_node(code) < 0) {
2534 archive_set_error(&a->archive, ENOMEM,
2535 "Unable to allocate memory for node data.");
2536 return (ARCHIVE_FATAL);
2538 code->tree[lastnode].branches[bit] = code->numentries++;
2542 lastnode = code->tree[lastnode].branches[bit];
2546 if (!(code->tree[lastnode].branches[0] == -1
2547 && code->tree[lastnode].branches[1] == -2))
2549 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
2551 return (ARCHIVE_FATAL);
2554 /* Set leaf value */
2555 code->tree[lastnode].branches[0] = value;
2556 code->tree[lastnode].branches[1] = value;
2558 return (ARCHIVE_OK);
2562 new_node(struct huffman_code *code)
2565 if (code->numallocatedentries == code->numentries) {
2566 int new_num_entries = 256;
2567 if (code->numentries > 0) {
2568 new_num_entries = code->numentries * 2;
2570 new_tree = realloc(code->tree, new_num_entries * sizeof(*code->tree));
2571 if (new_tree == NULL)
2573 code->tree = (struct huffman_tree_node *)new_tree;
2574 code->numallocatedentries = new_num_entries;
2576 code->tree[code->numentries].branches[0] = -1;
2577 code->tree[code->numentries].branches[1] = -2;
2582 make_table(struct archive_read *a, struct huffman_code *code)
2584 if (code->maxlength < code->minlength || code->maxlength > 10)
2585 code->tablesize = 10;
2587 code->tablesize = code->maxlength;
2590 (struct huffman_table_entry *)calloc(1, sizeof(*code->table)
2591 * ((size_t)1 << code->tablesize));
2593 return make_table_recurse(a, code, 0, code->table, 0, code->tablesize);
2597 make_table_recurse(struct archive_read *a, struct huffman_code *code, int node,
2598 struct huffman_table_entry *table, int depth,
2601 int currtablesize, i, ret = (ARCHIVE_OK);
2605 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
2606 "Huffman tree was not created.");
2607 return (ARCHIVE_FATAL);
2609 if (node < 0 || node >= code->numentries)
2611 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
2612 "Invalid location to Huffman tree specified.");
2613 return (ARCHIVE_FATAL);
2616 currtablesize = 1 << (maxdepth - depth);
2618 if (code->tree[node].branches[0] ==
2619 code->tree[node].branches[1])
2621 for(i = 0; i < currtablesize; i++)
2623 table[i].length = depth;
2624 table[i].value = code->tree[node].branches[0];
2629 for(i = 0; i < currtablesize; i++)
2630 table[i].length = -1;
2634 if(depth == maxdepth)
2636 table[0].length = maxdepth + 1;
2637 table[0].value = node;
2641 ret |= make_table_recurse(a, code, code->tree[node].branches[0], table,
2642 depth + 1, maxdepth);
2643 ret |= make_table_recurse(a, code, code->tree[node].branches[1],
2644 table + currtablesize / 2, depth + 1, maxdepth);
2651 expand(struct archive_read *a, int64_t end)
2653 static const unsigned char lengthbases[] =
2654 { 0, 1, 2, 3, 4, 5, 6,
2655 7, 8, 10, 12, 14, 16, 20,
2656 24, 28, 32, 40, 48, 56, 64,
2657 80, 96, 112, 128, 160, 192, 224 };
2658 static const unsigned char lengthbits[] =
2659 { 0, 0, 0, 0, 0, 0, 0,
2660 0, 1, 1, 1, 1, 2, 2,
2661 2, 2, 3, 3, 3, 3, 4,
2662 4, 4, 4, 5, 5, 5, 5 };
2663 static const unsigned int offsetbases[] =
2665 8, 12, 16, 24, 32, 48,
2666 64, 96, 128, 192, 256, 384,
2667 512, 768, 1024, 1536, 2048, 3072,
2668 4096, 6144, 8192, 12288, 16384, 24576,
2669 32768, 49152, 65536, 98304, 131072, 196608,
2670 262144, 327680, 393216, 458752, 524288, 589824,
2671 655360, 720896, 786432, 851968, 917504, 983040,
2672 1048576, 1310720, 1572864, 1835008, 2097152, 2359296,
2673 2621440, 2883584, 3145728, 3407872, 3670016, 3932160 };
2674 static const unsigned char offsetbits[] =
2675 { 0, 0, 0, 0, 1, 1, 2, 2, 3, 3, 4, 4,
2676 5, 5, 6, 6, 7, 7, 8, 8, 9, 9, 10, 10,
2677 11, 11, 12, 12, 13, 13, 14, 14, 15, 15, 16, 16,
2678 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16,
2679 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18 };
2680 static const unsigned char shortbases[] =
2681 { 0, 4, 8, 16, 32, 64, 128, 192 };
2682 static const unsigned char shortbits[] =
2683 { 2, 2, 3, 4, 5, 6, 6, 6 };
2685 int symbol, offs, len, offsindex, lensymbol, i, offssymbol, lowoffsetsymbol;
2686 unsigned char newfile;
2687 struct rar *rar = (struct rar *)(a->format->data);
2688 struct rar_br *br = &(rar->br);
2690 if (rar->filterstart < end)
2691 end = rar->filterstart;
2695 if (rar->output_last_match &&
2696 lzss_position(&rar->lzss) + rar->lastlength <= end)
2698 lzss_emit_match(rar, rar->lastoffset, rar->lastlength);
2699 rar->output_last_match = 0;
2702 if(rar->is_ppmd_block || rar->output_last_match ||
2703 lzss_position(&rar->lzss) >= end)
2704 return lzss_position(&rar->lzss);
2706 if ((symbol = read_next_symbol(a, &rar->maincode)) < 0)
2707 return (ARCHIVE_FATAL);
2708 rar->output_last_match = 0;
2712 lzss_emit_literal(rar, symbol);
2715 else if (symbol == 256)
2717 if (!rar_br_read_ahead(a, br, 1))
2718 goto truncated_data;
2719 newfile = !rar_br_bits(br, 1);
2720 rar_br_consume(br, 1);
2724 rar->start_new_block = 1;
2725 if (!rar_br_read_ahead(a, br, 1))
2726 goto truncated_data;
2727 rar->start_new_table = rar_br_bits(br, 1);
2728 rar_br_consume(br, 1);
2729 return lzss_position(&rar->lzss);
2733 if (parse_codes(a) != ARCHIVE_OK)
2734 return (ARCHIVE_FATAL);
2738 else if(symbol==257)
2740 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
2741 "Parsing filters is unsupported.");
2742 return (ARCHIVE_FAILED);
2744 else if(symbol==258)
2746 if(rar->lastlength == 0)
2749 offs = rar->lastoffset;
2750 len = rar->lastlength;
2752 else if (symbol <= 262)
2754 offsindex = symbol - 259;
2755 offs = rar->oldoffset[offsindex];
2757 if ((lensymbol = read_next_symbol(a, &rar->lengthcode)) < 0)
2759 if (lensymbol > (int)(sizeof(lengthbases)/sizeof(lengthbases[0])))
2761 if (lensymbol > (int)(sizeof(lengthbits)/sizeof(lengthbits[0])))
2763 len = lengthbases[lensymbol] + 2;
2764 if (lengthbits[lensymbol] > 0) {
2765 if (!rar_br_read_ahead(a, br, lengthbits[lensymbol]))
2766 goto truncated_data;
2767 len += rar_br_bits(br, lengthbits[lensymbol]);
2768 rar_br_consume(br, lengthbits[lensymbol]);
2771 for (i = offsindex; i > 0; i--)
2772 rar->oldoffset[i] = rar->oldoffset[i-1];
2773 rar->oldoffset[0] = offs;
2775 else if(symbol<=270)
2777 offs = shortbases[symbol-263] + 1;
2778 if(shortbits[symbol-263] > 0) {
2779 if (!rar_br_read_ahead(a, br, shortbits[symbol-263]))
2780 goto truncated_data;
2781 offs += rar_br_bits(br, shortbits[symbol-263]);
2782 rar_br_consume(br, shortbits[symbol-263]);
2787 for(i = 3; i > 0; i--)
2788 rar->oldoffset[i] = rar->oldoffset[i-1];
2789 rar->oldoffset[0] = offs;
2793 if (symbol-271 > (int)(sizeof(lengthbases)/sizeof(lengthbases[0])))
2795 if (symbol-271 > (int)(sizeof(lengthbits)/sizeof(lengthbits[0])))
2797 len = lengthbases[symbol-271]+3;
2798 if(lengthbits[symbol-271] > 0) {
2799 if (!rar_br_read_ahead(a, br, lengthbits[symbol-271]))
2800 goto truncated_data;
2801 len += rar_br_bits(br, lengthbits[symbol-271]);
2802 rar_br_consume(br, lengthbits[symbol-271]);
2805 if ((offssymbol = read_next_symbol(a, &rar->offsetcode)) < 0)
2807 if (offssymbol > (int)(sizeof(offsetbases)/sizeof(offsetbases[0])))
2809 if (offssymbol > (int)(sizeof(offsetbits)/sizeof(offsetbits[0])))
2811 offs = offsetbases[offssymbol]+1;
2812 if(offsetbits[offssymbol] > 0)
2816 if(offsetbits[offssymbol] > 4) {
2817 if (!rar_br_read_ahead(a, br, offsetbits[offssymbol] - 4))
2818 goto truncated_data;
2819 offs += rar_br_bits(br, offsetbits[offssymbol] - 4) << 4;
2820 rar_br_consume(br, offsetbits[offssymbol] - 4);
2823 if(rar->numlowoffsetrepeats > 0)
2825 rar->numlowoffsetrepeats--;
2826 offs += rar->lastlowoffset;
2830 if ((lowoffsetsymbol =
2831 read_next_symbol(a, &rar->lowoffsetcode)) < 0)
2832 return (ARCHIVE_FATAL);
2833 if(lowoffsetsymbol == 16)
2835 rar->numlowoffsetrepeats = 15;
2836 offs += rar->lastlowoffset;
2840 offs += lowoffsetsymbol;
2841 rar->lastlowoffset = lowoffsetsymbol;
2846 if (!rar_br_read_ahead(a, br, offsetbits[offssymbol]))
2847 goto truncated_data;
2848 offs += rar_br_bits(br, offsetbits[offssymbol]);
2849 rar_br_consume(br, offsetbits[offssymbol]);
2853 if (offs >= 0x40000)
2858 for(i = 3; i > 0; i--)
2859 rar->oldoffset[i] = rar->oldoffset[i-1];
2860 rar->oldoffset[0] = offs;
2863 rar->lastoffset = offs;
2864 rar->lastlength = len;
2865 rar->output_last_match = 1;
2868 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
2869 "Truncated RAR file data");
2871 return (ARCHIVE_FATAL);
2873 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
2874 "Bad RAR file data");
2875 return (ARCHIVE_FATAL);
2879 copy_from_lzss_window(struct archive_read *a, const void **buffer,
2880 int64_t startpos, int length)
2882 int windowoffs, firstpart;
2883 struct rar *rar = (struct rar *)(a->format->data);
2885 if (!rar->unp_buffer)
2887 if ((rar->unp_buffer = malloc(rar->unp_buffer_size)) == NULL)
2889 archive_set_error(&a->archive, ENOMEM,
2890 "Unable to allocate memory for uncompressed data.");
2891 return (ARCHIVE_FATAL);
2895 windowoffs = lzss_offset_for_position(&rar->lzss, startpos);
2896 if(windowoffs + length <= lzss_size(&rar->lzss)) {
2897 memcpy(&rar->unp_buffer[rar->unp_offset], &rar->lzss.window[windowoffs],
2899 } else if (length <= lzss_size(&rar->lzss)) {
2900 firstpart = lzss_size(&rar->lzss) - windowoffs;
2901 if (firstpart < 0) {
2902 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
2903 "Bad RAR file data");
2904 return (ARCHIVE_FATAL);
2906 if (firstpart < length) {
2907 memcpy(&rar->unp_buffer[rar->unp_offset],
2908 &rar->lzss.window[windowoffs], firstpart);
2909 memcpy(&rar->unp_buffer[rar->unp_offset + firstpart],
2910 &rar->lzss.window[0], length - firstpart);
2912 memcpy(&rar->unp_buffer[rar->unp_offset],
2913 &rar->lzss.window[windowoffs], length);
2916 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
2917 "Bad RAR file data");
2918 return (ARCHIVE_FATAL);
2920 rar->unp_offset += length;
2921 if (rar->unp_offset >= rar->unp_buffer_size)
2922 *buffer = rar->unp_buffer;
2925 return (ARCHIVE_OK);
2929 rar_read_ahead(struct archive_read *a, size_t min, ssize_t *avail)
2931 struct rar *rar = (struct rar *)(a->format->data);
2932 const void *h = __archive_read_ahead(a, min, avail);
2936 if (a->archive.read_data_is_posix_read && *avail > (ssize_t)a->archive.read_data_requested)
2937 *avail = a->archive.read_data_requested;
2938 if (*avail > rar->bytes_remaining)
2939 *avail = (ssize_t)rar->bytes_remaining;
2942 else if (*avail == 0 && rar->main_flags & MHD_VOLUME &&
2943 rar->file_flags & FHD_SPLIT_AFTER)
2945 rar->filename_must_match = 1;
2946 ret = archive_read_format_rar_read_header(a, a->entry);
2947 if (ret == (ARCHIVE_EOF))
2949 rar->has_endarc_header = 1;
2950 ret = archive_read_format_rar_read_header(a, a->entry);
2952 rar->filename_must_match = 0;
2953 if (ret != (ARCHIVE_OK))
2955 return rar_read_ahead(a, min, avail);