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;
263 struct huffman_code maincode;
264 struct huffman_code offsetcode;
265 struct huffman_code lowoffsetcode;
266 struct huffman_code lengthcode;
267 unsigned char lengthtable[HUFFMAN_TABLE_SIZE];
269 char output_last_match;
270 unsigned int lastlength;
271 unsigned int lastoffset;
272 unsigned int oldoffset[4];
273 unsigned int lastlowoffset;
274 unsigned int numlowoffsetrepeats;
276 char start_new_table;
278 /* PPMd Variant H members */
283 CPpmd7 ppmd7_context;
284 CPpmd7z_RangeDec range_dec;
288 * String conversion object.
290 int init_default_conversion;
291 struct archive_string_conv *sconv_default;
292 struct archive_string_conv *opt_sconv;
293 struct archive_string_conv *sconv_utf8;
294 struct archive_string_conv *sconv_utf16be;
300 #define CACHE_TYPE uint64_t
301 #define CACHE_BITS (8 * sizeof(CACHE_TYPE))
303 CACHE_TYPE cache_buffer;
304 /* Indicates how many bits avail in cache_buffer. */
307 const unsigned char *next_in;
311 * Custom field to denote that this archive contains encrypted entries
313 int has_encrypted_entries;
316 static int archive_read_support_format_rar_capabilities(struct archive_read *);
317 static int archive_read_format_rar_has_encrypted_entries(struct archive_read *);
318 static int archive_read_format_rar_bid(struct archive_read *, int);
319 static int archive_read_format_rar_options(struct archive_read *,
320 const char *, const char *);
321 static int archive_read_format_rar_read_header(struct archive_read *,
322 struct archive_entry *);
323 static int archive_read_format_rar_read_data(struct archive_read *,
324 const void **, size_t *, int64_t *);
325 static int archive_read_format_rar_read_data_skip(struct archive_read *a);
326 static int64_t archive_read_format_rar_seek_data(struct archive_read *, int64_t,
328 static int archive_read_format_rar_cleanup(struct archive_read *);
330 /* Support functions */
331 static int read_header(struct archive_read *, struct archive_entry *, char);
332 static time_t get_time(int);
333 static int read_exttime(const char *, struct rar *, const char *);
334 static int read_symlink_stored(struct archive_read *, struct archive_entry *,
335 struct archive_string_conv *);
336 static int read_data_stored(struct archive_read *, const void **, size_t *,
338 static int read_data_compressed(struct archive_read *, const void **, size_t *,
340 static int rar_br_preparation(struct archive_read *, struct rar_br *);
341 static int parse_codes(struct archive_read *);
342 static void free_codes(struct archive_read *);
343 static int read_next_symbol(struct archive_read *, struct huffman_code *);
344 static int create_code(struct archive_read *, struct huffman_code *,
345 unsigned char *, int, char);
346 static int add_value(struct archive_read *, struct huffman_code *, int, int,
348 static int new_node(struct huffman_code *);
349 static int make_table(struct archive_read *, struct huffman_code *);
350 static int make_table_recurse(struct archive_read *, struct huffman_code *, int,
351 struct huffman_table_entry *, int, int);
352 static int64_t expand(struct archive_read *, int64_t);
353 static int copy_from_lzss_window(struct archive_read *, const void **,
355 static const void *rar_read_ahead(struct archive_read *, size_t, ssize_t *);
360 /* Check that the cache buffer has enough bits. */
361 #define rar_br_has(br, n) ((br)->cache_avail >= n)
362 /* Get compressed data by bit. */
363 #define rar_br_bits(br, n) \
364 (((uint32_t)((br)->cache_buffer >> \
365 ((br)->cache_avail - (n)))) & cache_masks[n])
366 #define rar_br_bits_forced(br, n) \
367 (((uint32_t)((br)->cache_buffer << \
368 ((n) - (br)->cache_avail))) & cache_masks[n])
369 /* Read ahead to make sure the cache buffer has enough compressed data we
371 * True : completed, there is enough data in the cache buffer.
372 * False : there is no data in the stream. */
373 #define rar_br_read_ahead(a, br, n) \
374 ((rar_br_has(br, (n)) || rar_br_fillup(a, br)) || rar_br_has(br, (n)))
375 /* Notify how many bits we consumed. */
376 #define rar_br_consume(br, n) ((br)->cache_avail -= (n))
377 #define rar_br_consume_unalined_bits(br) ((br)->cache_avail &= ~7)
379 static const uint32_t cache_masks[] = {
380 0x00000000, 0x00000001, 0x00000003, 0x00000007,
381 0x0000000F, 0x0000001F, 0x0000003F, 0x0000007F,
382 0x000000FF, 0x000001FF, 0x000003FF, 0x000007FF,
383 0x00000FFF, 0x00001FFF, 0x00003FFF, 0x00007FFF,
384 0x0000FFFF, 0x0001FFFF, 0x0003FFFF, 0x0007FFFF,
385 0x000FFFFF, 0x001FFFFF, 0x003FFFFF, 0x007FFFFF,
386 0x00FFFFFF, 0x01FFFFFF, 0x03FFFFFF, 0x07FFFFFF,
387 0x0FFFFFFF, 0x1FFFFFFF, 0x3FFFFFFF, 0x7FFFFFFF,
388 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF
392 * Shift away used bits in the cache data and fill it up with following bits.
393 * Call this when cache buffer does not have enough bits you need.
395 * Returns 1 if the cache buffer is full.
396 * Returns 0 if the cache buffer is not full; input buffer is empty.
399 rar_br_fillup(struct archive_read *a, struct rar_br *br)
401 struct rar *rar = (struct rar *)(a->format->data);
402 int n = CACHE_BITS - br->cache_avail;
407 if (br->avail_in >= 8) {
409 ((uint64_t)br->next_in[0]) << 56 |
410 ((uint64_t)br->next_in[1]) << 48 |
411 ((uint64_t)br->next_in[2]) << 40 |
412 ((uint64_t)br->next_in[3]) << 32 |
413 ((uint32_t)br->next_in[4]) << 24 |
414 ((uint32_t)br->next_in[5]) << 16 |
415 ((uint32_t)br->next_in[6]) << 8 |
416 (uint32_t)br->next_in[7];
419 br->cache_avail += 8 * 8;
420 rar->bytes_unconsumed += 8;
421 rar->bytes_remaining -= 8;
426 if (br->avail_in >= 7) {
428 (br->cache_buffer << 56) |
429 ((uint64_t)br->next_in[0]) << 48 |
430 ((uint64_t)br->next_in[1]) << 40 |
431 ((uint64_t)br->next_in[2]) << 32 |
432 ((uint32_t)br->next_in[3]) << 24 |
433 ((uint32_t)br->next_in[4]) << 16 |
434 ((uint32_t)br->next_in[5]) << 8 |
435 (uint32_t)br->next_in[6];
438 br->cache_avail += 7 * 8;
439 rar->bytes_unconsumed += 7;
440 rar->bytes_remaining -= 7;
445 if (br->avail_in >= 6) {
447 (br->cache_buffer << 48) |
448 ((uint64_t)br->next_in[0]) << 40 |
449 ((uint64_t)br->next_in[1]) << 32 |
450 ((uint32_t)br->next_in[2]) << 24 |
451 ((uint32_t)br->next_in[3]) << 16 |
452 ((uint32_t)br->next_in[4]) << 8 |
453 (uint32_t)br->next_in[5];
456 br->cache_avail += 6 * 8;
457 rar->bytes_unconsumed += 6;
458 rar->bytes_remaining -= 6;
463 /* We have enough compressed data in
464 * the cache buffer.*/
469 if (br->avail_in <= 0) {
471 if (rar->bytes_unconsumed > 0) {
472 /* Consume as much as the decompressor
474 __archive_read_consume(a, rar->bytes_unconsumed);
475 rar->bytes_unconsumed = 0;
477 br->next_in = rar_read_ahead(a, 1, &(br->avail_in));
478 if (br->next_in == NULL)
480 if (br->avail_in == 0)
484 (br->cache_buffer << 8) | *br->next_in++;
486 br->cache_avail += 8;
488 rar->bytes_unconsumed++;
489 rar->bytes_remaining--;
494 rar_br_preparation(struct archive_read *a, struct rar_br *br)
496 struct rar *rar = (struct rar *)(a->format->data);
498 if (rar->bytes_remaining > 0) {
499 br->next_in = rar_read_ahead(a, 1, &(br->avail_in));
500 if (br->next_in == NULL) {
501 archive_set_error(&a->archive,
502 ARCHIVE_ERRNO_FILE_FORMAT,
503 "Truncated RAR file data");
504 return (ARCHIVE_FATAL);
506 if (br->cache_avail == 0)
507 (void)rar_br_fillup(a, br);
512 /* Find last bit set */
514 rar_fls(unsigned int word)
520 word |= (word >> 16);
521 return word - (word >> 1);
525 static inline int64_t
526 lzss_position(struct lzss *lzss)
528 return lzss->position;
532 lzss_mask(struct lzss *lzss)
538 lzss_size(struct lzss *lzss)
540 return lzss->mask + 1;
544 lzss_offset_for_position(struct lzss *lzss, int64_t pos)
546 return (int)(pos & lzss->mask);
549 static inline unsigned char *
550 lzss_pointer_for_position(struct lzss *lzss, int64_t pos)
552 return &lzss->window[lzss_offset_for_position(lzss, pos)];
556 lzss_current_offset(struct lzss *lzss)
558 return lzss_offset_for_position(lzss, lzss->position);
561 static inline uint8_t *
562 lzss_current_pointer(struct lzss *lzss)
564 return lzss_pointer_for_position(lzss, lzss->position);
568 lzss_emit_literal(struct rar *rar, uint8_t literal)
570 *lzss_current_pointer(&rar->lzss) = literal;
571 rar->lzss.position++;
575 lzss_emit_match(struct rar *rar, int offset, int length)
577 int dstoffs = lzss_current_offset(&rar->lzss);
578 int srcoffs = (dstoffs - offset) & lzss_mask(&rar->lzss);
579 int l, li, remaining;
580 unsigned char *d, *s;
583 while (remaining > 0) {
585 if (dstoffs > srcoffs) {
586 if (l > lzss_size(&rar->lzss) - dstoffs)
587 l = lzss_size(&rar->lzss) - dstoffs;
589 if (l > lzss_size(&rar->lzss) - srcoffs)
590 l = lzss_size(&rar->lzss) - srcoffs;
592 d = &(rar->lzss.window[dstoffs]);
593 s = &(rar->lzss.window[srcoffs]);
594 if ((dstoffs + l < srcoffs) || (srcoffs + l < dstoffs))
597 for (li = 0; li < l; li++)
601 dstoffs = (dstoffs + l) & lzss_mask(&(rar->lzss));
602 srcoffs = (srcoffs + l) & lzss_mask(&(rar->lzss));
604 rar->lzss.position += length;
608 ppmd_alloc(void *p, size_t size)
614 ppmd_free(void *p, void *address)
619 static ISzAlloc g_szalloc = { ppmd_alloc, ppmd_free };
624 struct archive_read *a = ((IByteIn*)p)->a;
625 struct rar *rar = (struct rar *)(a->format->data);
626 struct rar_br *br = &(rar->br);
628 if (!rar_br_read_ahead(a, br, 8))
630 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
631 "Truncated RAR file data");
635 b = rar_br_bits(br, 8);
636 rar_br_consume(br, 8);
641 archive_read_support_format_rar(struct archive *_a)
643 struct archive_read *a = (struct archive_read *)_a;
647 archive_check_magic(_a, ARCHIVE_READ_MAGIC, ARCHIVE_STATE_NEW,
648 "archive_read_support_format_rar");
650 rar = (struct rar *)calloc(sizeof(*rar), 1);
653 archive_set_error(&a->archive, ENOMEM, "Can't allocate rar data");
654 return (ARCHIVE_FATAL);
658 * Until enough data has been read, we cannot tell about
659 * any encrypted entries yet.
661 rar->has_encrypted_entries = ARCHIVE_READ_FORMAT_ENCRYPTION_DONT_KNOW;
663 r = __archive_read_register_format(a,
666 archive_read_format_rar_bid,
667 archive_read_format_rar_options,
668 archive_read_format_rar_read_header,
669 archive_read_format_rar_read_data,
670 archive_read_format_rar_read_data_skip,
671 archive_read_format_rar_seek_data,
672 archive_read_format_rar_cleanup,
673 archive_read_support_format_rar_capabilities,
674 archive_read_format_rar_has_encrypted_entries);
682 archive_read_support_format_rar_capabilities(struct archive_read * a)
684 (void)a; /* UNUSED */
685 return (ARCHIVE_READ_FORMAT_CAPS_ENCRYPT_DATA
686 | ARCHIVE_READ_FORMAT_CAPS_ENCRYPT_METADATA);
690 archive_read_format_rar_has_encrypted_entries(struct archive_read *_a)
692 if (_a && _a->format) {
693 struct rar * rar = (struct rar *)_a->format->data;
695 return rar->has_encrypted_entries;
698 return ARCHIVE_READ_FORMAT_ENCRYPTION_DONT_KNOW;
703 archive_read_format_rar_bid(struct archive_read *a, int best_bid)
707 /* If there's already a bid > 30, we'll never win. */
711 if ((p = __archive_read_ahead(a, 7, NULL)) == NULL)
714 if (memcmp(p, RAR_SIGNATURE, 7) == 0)
717 if ((p[0] == 'M' && p[1] == 'Z') || memcmp(p, "\x7F\x45LF", 4) == 0) {
718 /* This is a PE file */
719 ssize_t offset = 0x10000;
720 ssize_t window = 4096;
722 while (offset + window <= (1024 * 128)) {
723 const char *buff = __archive_read_ahead(a, offset + window, &bytes_avail);
725 /* Remaining bytes are less than window. */
732 while (p + 7 < buff + bytes_avail) {
733 if (memcmp(p, RAR_SIGNATURE, 7) == 0)
744 skip_sfx(struct archive_read *a)
749 ssize_t bytes, window;
753 while (total + window <= (1024 * 128)) {
754 h = __archive_read_ahead(a, window, &bytes);
756 /* Remaining bytes are less than window. */
768 * Scan ahead until we find something that looks
769 * like the RAR header.
772 if (memcmp(p, RAR_SIGNATURE, 7) == 0) {
773 skip = p - (const char *)h;
774 __archive_read_consume(a, skip);
779 skip = p - (const char *)h;
780 __archive_read_consume(a, skip);
784 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
785 "Couldn't find out RAR header");
786 return (ARCHIVE_FATAL);
790 archive_read_format_rar_options(struct archive_read *a,
791 const char *key, const char *val)
794 int ret = ARCHIVE_FAILED;
796 rar = (struct rar *)(a->format->data);
797 if (strcmp(key, "hdrcharset") == 0) {
798 if (val == NULL || val[0] == 0)
799 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
800 "rar: hdrcharset option needs a character-set name");
803 archive_string_conversion_from_charset(
804 &a->archive, val, 0);
805 if (rar->opt_sconv != NULL)
813 /* Note: The "warn" return is just to inform the options
814 * supervisor that we didn't handle it. It will generate
815 * a suitable error if no one used this option. */
816 return (ARCHIVE_WARN);
820 archive_read_format_rar_read_header(struct archive_read *a,
821 struct archive_entry *entry)
830 unsigned long crc32_expected;
832 a->archive.archive_format = ARCHIVE_FORMAT_RAR;
833 if (a->archive.archive_format_name == NULL)
834 a->archive.archive_format_name = "RAR";
836 rar = (struct rar *)(a->format->data);
839 * It should be sufficient to call archive_read_next_header() for
840 * a reader to determine if an entry is encrypted or not. If the
841 * encryption of an entry is only detectable when calling
842 * archive_read_data(), so be it. We'll do the same check there
845 if (rar->has_encrypted_entries == ARCHIVE_READ_FORMAT_ENCRYPTION_DONT_KNOW) {
846 rar->has_encrypted_entries = 0;
849 /* RAR files can be generated without EOF headers, so return ARCHIVE_EOF if
852 if ((h = __archive_read_ahead(a, 7, NULL)) == NULL)
853 return (ARCHIVE_EOF);
856 if (rar->found_first_header == 0 &&
857 ((p[0] == 'M' && p[1] == 'Z') || memcmp(p, "\x7F\x45LF", 4) == 0)) {
858 /* This is an executable ? Must be self-extracting... */
860 if (ret < ARCHIVE_WARN)
863 rar->found_first_header = 1;
867 unsigned long crc32_val;
869 if ((h = __archive_read_ahead(a, 7, NULL)) == NULL)
870 return (ARCHIVE_FATAL);
877 if (memcmp(p, RAR_SIGNATURE, 7) != 0) {
878 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
879 "Invalid marker header");
880 return (ARCHIVE_FATAL);
882 __archive_read_consume(a, 7);
886 rar->main_flags = archive_le16dec(p + 3);
887 skip = archive_le16dec(p + 5);
888 if (skip < 7 + sizeof(rar->reserved1) + sizeof(rar->reserved2)) {
889 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
890 "Invalid header size");
891 return (ARCHIVE_FATAL);
893 if ((h = __archive_read_ahead(a, skip, NULL)) == NULL)
894 return (ARCHIVE_FATAL);
896 memcpy(rar->reserved1, p + 7, sizeof(rar->reserved1));
897 memcpy(rar->reserved2, p + 7 + sizeof(rar->reserved1),
898 sizeof(rar->reserved2));
899 if (rar->main_flags & MHD_ENCRYPTVER) {
900 if (skip < 7 + sizeof(rar->reserved1) + sizeof(rar->reserved2)+1) {
901 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
902 "Invalid header size");
903 return (ARCHIVE_FATAL);
905 rar->encryptver = *(p + 7 + sizeof(rar->reserved1) +
906 sizeof(rar->reserved2));
909 /* Main header is password encrypted, so we cannot read any
910 file names or any other info about files from the header. */
911 if (rar->main_flags & MHD_PASSWORD)
913 archive_entry_set_is_metadata_encrypted(entry, 1);
914 archive_entry_set_is_data_encrypted(entry, 1);
915 rar->has_encrypted_entries = 1;
916 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
917 "RAR encryption support unavailable.");
918 return (ARCHIVE_FATAL);
921 crc32_val = crc32(0, (const unsigned char *)p + 2, (unsigned)skip - 2);
922 if ((crc32_val & 0xffff) != archive_le16dec(p)) {
923 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
925 return (ARCHIVE_FATAL);
927 __archive_read_consume(a, skip);
931 return read_header(a, entry, head_type);
939 flags = archive_le16dec(p + 3);
940 skip = archive_le16dec(p + 5);
942 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
943 "Invalid header size too small");
944 return (ARCHIVE_FATAL);
946 if (flags & HD_ADD_SIZE_PRESENT)
949 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
950 "Invalid header size too small");
951 return (ARCHIVE_FATAL);
953 if ((h = __archive_read_ahead(a, skip, NULL)) == NULL)
954 return (ARCHIVE_FATAL);
956 skip += archive_le32dec(p + 7);
959 /* Skip over the 2-byte CRC at the beginning of the header. */
960 crc32_expected = archive_le16dec(p);
961 __archive_read_consume(a, 2);
964 /* Skim the entire header and compute the CRC. */
967 size_t to_read = skip;
969 if (to_read > 32 * 1024) {
972 if ((h = __archive_read_ahead(a, to_read, &did_read)) == NULL) {
973 return (ARCHIVE_FATAL);
976 crc32_val = crc32(crc32_val, (const unsigned char *)p, (unsigned)did_read);
977 __archive_read_consume(a, did_read);
980 if ((crc32_val & 0xffff) != crc32_expected) {
981 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
983 return (ARCHIVE_FATAL);
985 if (head_type == ENDARC_HEAD)
986 return (ARCHIVE_EOF);
990 if ((ret = read_header(a, entry, head_type)) < ARCHIVE_WARN)
995 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
997 return (ARCHIVE_FATAL);
1003 archive_read_format_rar_read_data(struct archive_read *a, const void **buff,
1004 size_t *size, int64_t *offset)
1006 struct rar *rar = (struct rar *)(a->format->data);
1009 if (rar->has_encrypted_entries == ARCHIVE_READ_FORMAT_ENCRYPTION_DONT_KNOW) {
1010 rar->has_encrypted_entries = 0;
1013 if (rar->bytes_unconsumed > 0) {
1014 /* Consume as much as the decompressor actually used. */
1015 __archive_read_consume(a, rar->bytes_unconsumed);
1016 rar->bytes_unconsumed = 0;
1020 if (rar->entry_eof || rar->offset_seek >= rar->unp_size) {
1022 *offset = rar->offset;
1023 if (*offset < rar->unp_size)
1024 *offset = rar->unp_size;
1025 return (ARCHIVE_EOF);
1028 switch (rar->compression_method)
1030 case COMPRESS_METHOD_STORE:
1031 ret = read_data_stored(a, buff, size, offset);
1034 case COMPRESS_METHOD_FASTEST:
1035 case COMPRESS_METHOD_FAST:
1036 case COMPRESS_METHOD_NORMAL:
1037 case COMPRESS_METHOD_GOOD:
1038 case COMPRESS_METHOD_BEST:
1039 ret = read_data_compressed(a, buff, size, offset);
1040 if (ret != ARCHIVE_OK && ret != ARCHIVE_WARN)
1041 __archive_ppmd7_functions.Ppmd7_Free(&rar->ppmd7_context, &g_szalloc);
1045 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
1046 "Unsupported compression method for RAR file.");
1047 ret = ARCHIVE_FATAL;
1054 archive_read_format_rar_read_data_skip(struct archive_read *a)
1057 int64_t bytes_skipped;
1060 rar = (struct rar *)(a->format->data);
1062 if (rar->bytes_unconsumed > 0) {
1063 /* Consume as much as the decompressor actually used. */
1064 __archive_read_consume(a, rar->bytes_unconsumed);
1065 rar->bytes_unconsumed = 0;
1068 if (rar->bytes_remaining > 0) {
1069 bytes_skipped = __archive_read_consume(a, rar->bytes_remaining);
1070 if (bytes_skipped < 0)
1071 return (ARCHIVE_FATAL);
1074 /* Compressed data to skip must be read from each header in a multivolume
1077 if (rar->main_flags & MHD_VOLUME && rar->file_flags & FHD_SPLIT_AFTER)
1079 ret = archive_read_format_rar_read_header(a, a->entry);
1080 if (ret == (ARCHIVE_EOF))
1081 ret = archive_read_format_rar_read_header(a, a->entry);
1082 if (ret != (ARCHIVE_OK))
1084 return archive_read_format_rar_read_data_skip(a);
1087 return (ARCHIVE_OK);
1091 archive_read_format_rar_seek_data(struct archive_read *a, int64_t offset,
1094 int64_t client_offset, ret;
1096 struct rar *rar = (struct rar *)(a->format->data);
1098 if (rar->compression_method == COMPRESS_METHOD_STORE)
1100 /* Modify the offset for use with SEEK_SET */
1104 client_offset = rar->offset_seek;
1107 client_offset = rar->unp_size;
1113 client_offset += offset;
1114 if (client_offset < 0)
1116 /* Can't seek past beginning of data block */
1119 else if (client_offset > rar->unp_size)
1122 * Set the returned offset but only seek to the end of
1125 rar->offset_seek = client_offset;
1126 client_offset = rar->unp_size;
1129 client_offset += rar->dbo[0].start_offset;
1131 while (i < rar->cursor)
1134 client_offset += rar->dbo[i].start_offset - rar->dbo[i-1].end_offset;
1136 if (rar->main_flags & MHD_VOLUME)
1138 /* Find the appropriate offset among the multivolume archive */
1141 if (client_offset < rar->dbo[rar->cursor].start_offset &&
1142 rar->file_flags & FHD_SPLIT_BEFORE)
1144 /* Search backwards for the correct data block */
1145 if (rar->cursor == 0)
1147 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
1148 "Attempt to seek past beginning of RAR data block");
1149 return (ARCHIVE_FAILED);
1152 client_offset -= rar->dbo[rar->cursor+1].start_offset -
1153 rar->dbo[rar->cursor].end_offset;
1154 if (client_offset < rar->dbo[rar->cursor].start_offset)
1156 ret = __archive_read_seek(a, rar->dbo[rar->cursor].start_offset -
1157 rar->dbo[rar->cursor].header_size, SEEK_SET);
1158 if (ret < (ARCHIVE_OK))
1160 ret = archive_read_format_rar_read_header(a, a->entry);
1161 if (ret != (ARCHIVE_OK))
1163 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
1164 "Error during seek of RAR file");
1165 return (ARCHIVE_FAILED);
1170 else if (client_offset > rar->dbo[rar->cursor].end_offset &&
1171 rar->file_flags & FHD_SPLIT_AFTER)
1173 /* Search forward for the correct data block */
1175 if (rar->cursor < rar->nodes &&
1176 client_offset > rar->dbo[rar->cursor].end_offset)
1178 client_offset += rar->dbo[rar->cursor].start_offset -
1179 rar->dbo[rar->cursor-1].end_offset;
1183 ret = __archive_read_seek(a, rar->dbo[rar->cursor].end_offset,
1185 if (ret < (ARCHIVE_OK))
1187 ret = archive_read_format_rar_read_header(a, a->entry);
1188 if (ret == (ARCHIVE_EOF))
1190 rar->has_endarc_header = 1;
1191 ret = archive_read_format_rar_read_header(a, a->entry);
1193 if (ret != (ARCHIVE_OK))
1195 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
1196 "Error during seek of RAR file");
1197 return (ARCHIVE_FAILED);
1199 client_offset += rar->dbo[rar->cursor].start_offset -
1200 rar->dbo[rar->cursor-1].end_offset;
1207 ret = __archive_read_seek(a, client_offset, SEEK_SET);
1208 if (ret < (ARCHIVE_OK))
1210 rar->bytes_remaining = rar->dbo[rar->cursor].end_offset - ret;
1215 ret -= rar->dbo[i+1].start_offset - rar->dbo[i].end_offset;
1217 ret -= rar->dbo[0].start_offset;
1219 /* Always restart reading the file after a seek */
1220 __archive_reset_read_data(&a->archive);
1222 rar->bytes_unconsumed = 0;
1226 * If a seek past the end of file was requested, return the requested
1229 if (ret == rar->unp_size && rar->offset_seek > rar->unp_size)
1230 return rar->offset_seek;
1232 /* Return the new offset */
1233 rar->offset_seek = ret;
1234 return rar->offset_seek;
1238 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
1239 "Seeking of compressed RAR files is unsupported");
1241 return (ARCHIVE_FAILED);
1245 archive_read_format_rar_cleanup(struct archive_read *a)
1249 rar = (struct rar *)(a->format->data);
1251 free(rar->filename);
1252 free(rar->filename_save);
1254 free(rar->unp_buffer);
1255 free(rar->lzss.window);
1256 __archive_ppmd7_functions.Ppmd7_Free(&rar->ppmd7_context, &g_szalloc);
1258 (a->format->data) = NULL;
1259 return (ARCHIVE_OK);
1263 read_header(struct archive_read *a, struct archive_entry *entry,
1267 const char *p, *endp;
1269 struct rar_header rar_header;
1270 struct rar_file_header file_header;
1271 int64_t header_size;
1272 unsigned filename_size, end;
1275 char packed_size[8];
1278 struct archive_string_conv *sconv, *fn_sconv;
1279 unsigned long crc32_val;
1280 int ret = (ARCHIVE_OK), ret2;
1282 rar = (struct rar *)(a->format->data);
1284 /* Setup a string conversion object for non-rar-unicode filenames. */
1285 sconv = rar->opt_sconv;
1286 if (sconv == NULL) {
1287 if (!rar->init_default_conversion) {
1288 rar->sconv_default =
1289 archive_string_default_conversion_for_read(
1291 rar->init_default_conversion = 1;
1293 sconv = rar->sconv_default;
1297 if ((h = __archive_read_ahead(a, 7, NULL)) == NULL)
1298 return (ARCHIVE_FATAL);
1300 memcpy(&rar_header, p, sizeof(rar_header));
1301 rar->file_flags = archive_le16dec(rar_header.flags);
1302 header_size = archive_le16dec(rar_header.size);
1303 if (header_size < (int64_t)sizeof(file_header) + 7) {
1304 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
1305 "Invalid header size");
1306 return (ARCHIVE_FATAL);
1308 crc32_val = crc32(0, (const unsigned char *)p + 2, 7 - 2);
1309 __archive_read_consume(a, 7);
1311 if (!(rar->file_flags & FHD_SOLID))
1313 rar->compression_method = 0;
1314 rar->packed_size = 0;
1321 memset(&rar->salt, 0, sizeof(rar->salt));
1333 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
1334 "RAR solid archive support unavailable.");
1335 return (ARCHIVE_FATAL);
1338 if ((h = __archive_read_ahead(a, (size_t)header_size - 7, NULL)) == NULL)
1339 return (ARCHIVE_FATAL);
1341 /* File Header CRC check. */
1342 crc32_val = crc32(crc32_val, h, (unsigned)(header_size - 7));
1343 if ((crc32_val & 0xffff) != archive_le16dec(rar_header.crc)) {
1344 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
1345 "Header CRC error");
1346 return (ARCHIVE_FATAL);
1348 /* If no CRC error, Go on parsing File Header. */
1350 endp = p + header_size - 7;
1351 memcpy(&file_header, p, sizeof(file_header));
1352 p += sizeof(file_header);
1354 rar->compression_method = file_header.method;
1356 ttime = archive_le32dec(file_header.file_time);
1357 rar->mtime = get_time(ttime);
1359 rar->file_crc = archive_le32dec(file_header.file_crc);
1361 if (rar->file_flags & FHD_PASSWORD)
1363 archive_entry_set_is_data_encrypted(entry, 1);
1364 rar->has_encrypted_entries = 1;
1365 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
1366 "RAR encryption support unavailable.");
1367 /* Since it is only the data part itself that is encrypted we can at least
1368 extract information about the currently processed entry and don't need
1369 to return ARCHIVE_FATAL here. */
1370 /*return (ARCHIVE_FATAL);*/
1373 if (rar->file_flags & FHD_LARGE)
1375 memcpy(packed_size, file_header.pack_size, 4);
1376 memcpy(packed_size + 4, p, 4); /* High pack size */
1378 memcpy(unp_size, file_header.unp_size, 4);
1379 memcpy(unp_size + 4, p, 4); /* High unpack size */
1381 rar->packed_size = archive_le64dec(&packed_size);
1382 rar->unp_size = archive_le64dec(&unp_size);
1386 rar->packed_size = archive_le32dec(file_header.pack_size);
1387 rar->unp_size = archive_le32dec(file_header.unp_size);
1390 if (rar->packed_size < 0 || rar->unp_size < 0)
1392 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
1393 "Invalid sizes specified.");
1394 return (ARCHIVE_FATAL);
1397 rar->bytes_remaining = rar->packed_size;
1399 /* TODO: RARv3 subblocks contain comments. For now the complete block is
1400 * consumed at the end.
1402 if (head_type == NEWSUB_HEAD) {
1403 size_t distance = p - (const char *)h;
1404 header_size += rar->packed_size;
1405 /* Make sure we have the extended data. */
1406 if ((h = __archive_read_ahead(a, (size_t)header_size - 7, NULL)) == NULL)
1407 return (ARCHIVE_FATAL);
1409 endp = p + header_size - 7;
1413 filename_size = archive_le16dec(file_header.name_size);
1414 if (p + filename_size > endp) {
1415 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
1416 "Invalid filename size");
1417 return (ARCHIVE_FATAL);
1419 if (rar->filename_allocated < filename_size * 2 + 2) {
1421 size_t newsize = filename_size * 2 + 2;
1422 newptr = realloc(rar->filename, newsize);
1423 if (newptr == NULL) {
1424 archive_set_error(&a->archive, ENOMEM,
1425 "Couldn't allocate memory.");
1426 return (ARCHIVE_FATAL);
1428 rar->filename = newptr;
1429 rar->filename_allocated = newsize;
1431 filename = rar->filename;
1432 memcpy(filename, p, filename_size);
1433 filename[filename_size] = '\0';
1434 if (rar->file_flags & FHD_UNICODE)
1436 if (filename_size != strlen(filename))
1438 unsigned char highbyte, flagbits, flagbyte;
1439 unsigned fn_end, offset;
1441 end = filename_size;
1442 fn_end = filename_size * 2;
1444 offset = (unsigned)strlen(filename) + 1;
1445 highbyte = *(p + offset++);
1448 while (offset < end && filename_size < fn_end)
1452 flagbyte = *(p + offset++);
1457 switch((flagbyte >> flagbits) & 3)
1460 filename[filename_size++] = '\0';
1461 filename[filename_size++] = *(p + offset++);
1464 filename[filename_size++] = highbyte;
1465 filename[filename_size++] = *(p + offset++);
1468 filename[filename_size++] = *(p + offset + 1);
1469 filename[filename_size++] = *(p + offset);
1475 uint8_t length = *(p + offset++);
1477 if (length & 0x80) {
1478 extra = *(p + offset++);
1479 high = (char)highbyte;
1482 length = (length & 0x7f) + 2;
1483 while (length && filename_size < fn_end) {
1484 unsigned cp = filename_size >> 1;
1485 filename[filename_size++] = high;
1486 filename[filename_size++] = p[cp] + extra;
1493 if (filename_size > fn_end) {
1494 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
1495 "Invalid filename");
1496 return (ARCHIVE_FATAL);
1498 filename[filename_size++] = '\0';
1500 * Do not increment filename_size here as the computations below
1501 * add the space for the terminating NUL explicitly.
1503 filename[filename_size] = '\0';
1505 /* Decoded unicode form is UTF-16BE, so we have to update a string
1506 * conversion object for it. */
1507 if (rar->sconv_utf16be == NULL) {
1508 rar->sconv_utf16be = archive_string_conversion_from_charset(
1509 &a->archive, "UTF-16BE", 1);
1510 if (rar->sconv_utf16be == NULL)
1511 return (ARCHIVE_FATAL);
1513 fn_sconv = rar->sconv_utf16be;
1516 while (memcmp(strp, "\x00\x00", 2))
1518 if (!memcmp(strp, "\x00\\", 2))
1525 * If FHD_UNICODE is set but no unicode data, this file name form
1526 * is UTF-8, so we have to update a string conversion object for
1529 if (rar->sconv_utf8 == NULL) {
1530 rar->sconv_utf8 = archive_string_conversion_from_charset(
1531 &a->archive, "UTF-8", 1);
1532 if (rar->sconv_utf8 == NULL)
1533 return (ARCHIVE_FATAL);
1535 fn_sconv = rar->sconv_utf8;
1536 while ((strp = strchr(filename, '\\')) != NULL)
1544 while ((strp = strchr(filename, '\\')) != NULL)
1549 /* Split file in multivolume RAR. No more need to process header. */
1550 if (rar->filename_save &&
1551 filename_size == rar->filename_save_size &&
1552 !memcmp(rar->filename, rar->filename_save, filename_size + 1))
1554 __archive_read_consume(a, header_size - 7);
1556 if (rar->cursor >= rar->nodes)
1560 realloc(rar->dbo, sizeof(*rar->dbo) * rar->nodes)) == NULL)
1562 archive_set_error(&a->archive, ENOMEM, "Couldn't allocate memory.");
1563 return (ARCHIVE_FATAL);
1565 rar->dbo[rar->cursor].header_size = header_size;
1566 rar->dbo[rar->cursor].start_offset = -1;
1567 rar->dbo[rar->cursor].end_offset = -1;
1569 if (rar->dbo[rar->cursor].start_offset < 0)
1571 rar->dbo[rar->cursor].start_offset = a->filter->position;
1572 rar->dbo[rar->cursor].end_offset = rar->dbo[rar->cursor].start_offset +
1578 rar->filename_save = (char*)realloc(rar->filename_save,
1580 memcpy(rar->filename_save, rar->filename, filename_size + 1);
1581 rar->filename_save_size = filename_size;
1583 /* Set info for seeking */
1585 if ((rar->dbo = calloc(1, sizeof(*rar->dbo))) == NULL)
1587 archive_set_error(&a->archive, ENOMEM, "Couldn't allocate memory.");
1588 return (ARCHIVE_FATAL);
1590 rar->dbo[0].header_size = header_size;
1591 rar->dbo[0].start_offset = -1;
1592 rar->dbo[0].end_offset = -1;
1596 if (rar->file_flags & FHD_SALT)
1599 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
1600 "Invalid header size");
1601 return (ARCHIVE_FATAL);
1603 memcpy(rar->salt, p, 8);
1607 if (rar->file_flags & FHD_EXTTIME) {
1608 if (read_exttime(p, rar, endp) < 0) {
1609 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
1610 "Invalid header size");
1611 return (ARCHIVE_FATAL);
1615 __archive_read_consume(a, header_size - 7);
1616 rar->dbo[0].start_offset = a->filter->position;
1617 rar->dbo[0].end_offset = rar->dbo[0].start_offset + rar->packed_size;
1619 switch(file_header.host_os)
1624 rar->mode = archive_le32dec(file_header.file_attr);
1625 if (rar->mode & FILE_ATTRIBUTE_DIRECTORY)
1626 rar->mode = AE_IFDIR | S_IXUSR | S_IXGRP | S_IXOTH;
1628 rar->mode = AE_IFREG;
1629 rar->mode |= S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH;
1635 rar->mode = archive_le32dec(file_header.file_attr);
1639 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
1640 "Unknown file attributes from RAR file's host OS");
1641 return (ARCHIVE_FATAL);
1644 rar->bytes_uncopied = rar->bytes_unconsumed = 0;
1645 rar->lzss.position = rar->offset = 0;
1646 rar->offset_seek = 0;
1647 rar->dictionary_size = 0;
1648 rar->offset_outgoing = 0;
1649 rar->br.cache_avail = 0;
1650 rar->br.avail_in = 0;
1651 rar->crc_calculated = 0;
1654 rar->is_ppmd_block = 0;
1655 rar->start_new_table = 1;
1656 free(rar->unp_buffer);
1657 rar->unp_buffer = NULL;
1658 rar->unp_offset = 0;
1659 rar->unp_buffer_size = UNP_BUFFER_SIZE;
1660 memset(rar->lengthtable, 0, sizeof(rar->lengthtable));
1661 __archive_ppmd7_functions.Ppmd7_Free(&rar->ppmd7_context, &g_szalloc);
1662 rar->ppmd_valid = rar->ppmd_eod = 0;
1664 /* Don't set any archive entries for non-file header types */
1665 if (head_type == NEWSUB_HEAD)
1668 archive_entry_set_mtime(entry, rar->mtime, rar->mnsec);
1669 archive_entry_set_ctime(entry, rar->ctime, rar->cnsec);
1670 archive_entry_set_atime(entry, rar->atime, rar->ansec);
1671 archive_entry_set_size(entry, rar->unp_size);
1672 archive_entry_set_mode(entry, rar->mode);
1674 if (archive_entry_copy_pathname_l(entry, filename, filename_size, fn_sconv))
1676 if (errno == ENOMEM)
1678 archive_set_error(&a->archive, ENOMEM,
1679 "Can't allocate memory for Pathname");
1680 return (ARCHIVE_FATAL);
1682 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
1683 "Pathname cannot be converted from %s to current locale.",
1684 archive_string_conversion_charset_name(fn_sconv));
1685 ret = (ARCHIVE_WARN);
1688 if (((rar->mode) & AE_IFMT) == AE_IFLNK)
1690 /* Make sure a symbolic-link file does not have its body. */
1691 rar->bytes_remaining = 0;
1692 archive_entry_set_size(entry, 0);
1694 /* Read a symbolic-link name. */
1695 if ((ret2 = read_symlink_stored(a, entry, sconv)) < (ARCHIVE_WARN))
1701 if (rar->bytes_remaining == 0)
1711 tm.tm_sec = 2 * (ttime & 0x1f);
1712 tm.tm_min = (ttime >> 5) & 0x3f;
1713 tm.tm_hour = (ttime >> 11) & 0x1f;
1714 tm.tm_mday = (ttime >> 16) & 0x1f;
1715 tm.tm_mon = ((ttime >> 21) & 0x0f) - 1;
1716 tm.tm_year = ((ttime >> 25) & 0x7f) + 80;
1722 read_exttime(const char *p, struct rar *rar, const char *endp)
1724 unsigned rmode, flags, rem, j, count;
1732 flags = archive_le16dec(p);
1735 for (i = 3; i >= 0; i--)
1740 rmode = flags >> i * 4;
1747 ttime = archive_le32dec(p);
1748 t = get_time(ttime);
1753 if (p + count > endp)
1755 for (j = 0; j < count; j++)
1757 rem = (((unsigned)(unsigned char)*p) << 16) | (rem >> 8);
1761 nsec = tm->tm_sec + rem / NS_UNIT;
1785 rar->arcnsec = nsec;
1793 read_symlink_stored(struct archive_read *a, struct archive_entry *entry,
1794 struct archive_string_conv *sconv)
1799 int ret = (ARCHIVE_OK);
1801 rar = (struct rar *)(a->format->data);
1802 if ((h = rar_read_ahead(a, (size_t)rar->packed_size, NULL)) == NULL)
1803 return (ARCHIVE_FATAL);
1806 if (archive_entry_copy_symlink_l(entry,
1807 p, (size_t)rar->packed_size, sconv))
1809 if (errno == ENOMEM)
1811 archive_set_error(&a->archive, ENOMEM,
1812 "Can't allocate memory for link");
1813 return (ARCHIVE_FATAL);
1815 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
1816 "link cannot be converted from %s to current locale.",
1817 archive_string_conversion_charset_name(sconv));
1818 ret = (ARCHIVE_WARN);
1820 __archive_read_consume(a, rar->packed_size);
1825 read_data_stored(struct archive_read *a, const void **buff, size_t *size,
1829 ssize_t bytes_avail;
1831 rar = (struct rar *)(a->format->data);
1832 if (rar->bytes_remaining == 0 &&
1833 !(rar->main_flags & MHD_VOLUME && rar->file_flags & FHD_SPLIT_AFTER))
1837 *offset = rar->offset;
1838 if (rar->file_crc != rar->crc_calculated) {
1839 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
1841 return (ARCHIVE_FATAL);
1844 return (ARCHIVE_EOF);
1847 *buff = rar_read_ahead(a, 1, &bytes_avail);
1848 if (bytes_avail <= 0)
1850 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
1851 "Truncated RAR file data");
1852 return (ARCHIVE_FATAL);
1855 *size = bytes_avail;
1856 *offset = rar->offset;
1857 rar->offset += bytes_avail;
1858 rar->offset_seek += bytes_avail;
1859 rar->bytes_remaining -= bytes_avail;
1860 rar->bytes_unconsumed = bytes_avail;
1861 /* Calculate File CRC. */
1862 rar->crc_calculated = crc32(rar->crc_calculated, *buff,
1863 (unsigned)bytes_avail);
1864 return (ARCHIVE_OK);
1868 read_data_compressed(struct archive_read *a, const void **buff, size_t *size,
1872 int64_t start, end, actualend;
1874 int ret = (ARCHIVE_OK), sym, code, lzss_offset, length, i;
1876 rar = (struct rar *)(a->format->data);
1880 return (ARCHIVE_FATAL);
1881 if (rar->ppmd_eod ||
1882 (rar->dictionary_size && rar->offset >= rar->unp_size))
1884 if (rar->unp_offset > 0) {
1886 * We have unprocessed extracted data. write it out.
1888 *buff = rar->unp_buffer;
1889 *size = rar->unp_offset;
1890 *offset = rar->offset_outgoing;
1891 rar->offset_outgoing += *size;
1892 /* Calculate File CRC. */
1893 rar->crc_calculated = crc32(rar->crc_calculated, *buff,
1895 rar->unp_offset = 0;
1896 return (ARCHIVE_OK);
1900 *offset = rar->offset;
1901 if (rar->file_crc != rar->crc_calculated) {
1902 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
1904 return (ARCHIVE_FATAL);
1907 return (ARCHIVE_EOF);
1910 if (!rar->is_ppmd_block && rar->dictionary_size && rar->bytes_uncopied > 0)
1912 if (rar->bytes_uncopied > (rar->unp_buffer_size - rar->unp_offset))
1913 bs = rar->unp_buffer_size - rar->unp_offset;
1915 bs = (size_t)rar->bytes_uncopied;
1916 ret = copy_from_lzss_window(a, buff, rar->offset, (int)bs);
1917 if (ret != ARCHIVE_OK)
1920 rar->bytes_uncopied -= bs;
1921 if (*buff != NULL) {
1922 rar->unp_offset = 0;
1923 *size = rar->unp_buffer_size;
1924 *offset = rar->offset_outgoing;
1925 rar->offset_outgoing += *size;
1926 /* Calculate File CRC. */
1927 rar->crc_calculated = crc32(rar->crc_calculated, *buff,
1934 if (!rar->br.next_in &&
1935 (ret = rar_br_preparation(a, &(rar->br))) < ARCHIVE_WARN)
1937 if (rar->start_new_table && ((ret = parse_codes(a)) < (ARCHIVE_WARN)))
1940 if (rar->is_ppmd_block)
1942 if ((sym = __archive_ppmd7_functions.Ppmd7_DecodeSymbol(
1943 &rar->ppmd7_context, &rar->range_dec.p)) < 0)
1945 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
1947 return (ARCHIVE_FATAL);
1949 if(sym != rar->ppmd_escape)
1951 lzss_emit_literal(rar, sym);
1952 rar->bytes_uncopied++;
1956 if ((code = __archive_ppmd7_functions.Ppmd7_DecodeSymbol(
1957 &rar->ppmd7_context, &rar->range_dec.p)) < 0)
1959 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
1961 return (ARCHIVE_FATAL);
1967 rar->start_new_table = 1;
1968 return read_data_compressed(a, buff, size, offset);
1971 rar->ppmd_eod = 1;/* End Of ppmd Data. */
1975 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
1976 "Parsing filters is unsupported.");
1977 return (ARCHIVE_FAILED);
1981 for (i = 2; i >= 0; i--)
1983 if ((code = __archive_ppmd7_functions.Ppmd7_DecodeSymbol(
1984 &rar->ppmd7_context, &rar->range_dec.p)) < 0)
1986 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
1988 return (ARCHIVE_FATAL);
1990 lzss_offset |= code << (i * 8);
1992 if ((length = __archive_ppmd7_functions.Ppmd7_DecodeSymbol(
1993 &rar->ppmd7_context, &rar->range_dec.p)) < 0)
1995 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
1997 return (ARCHIVE_FATAL);
1999 lzss_emit_match(rar, lzss_offset + 2, length + 32);
2000 rar->bytes_uncopied += length + 32;
2004 if ((length = __archive_ppmd7_functions.Ppmd7_DecodeSymbol(
2005 &rar->ppmd7_context, &rar->range_dec.p)) < 0)
2007 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
2009 return (ARCHIVE_FATAL);
2011 lzss_emit_match(rar, 1, length + 4);
2012 rar->bytes_uncopied += length + 4;
2016 lzss_emit_literal(rar, sym);
2017 rar->bytes_uncopied++;
2023 start = rar->offset;
2024 end = start + rar->dictionary_size;
2025 rar->filterstart = INT64_MAX;
2027 if ((actualend = expand(a, end)) < 0)
2028 return ((int)actualend);
2030 rar->bytes_uncopied = actualend - start;
2031 if (rar->bytes_uncopied == 0) {
2032 /* Broken RAR files cause this case.
2033 * NOTE: If this case were possible on a normal RAR file
2034 * we would find out where it was actually bad and
2035 * what we would do to solve it. */
2036 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
2037 "Internal error extracting RAR file");
2038 return (ARCHIVE_FATAL);
2041 if (rar->bytes_uncopied > (rar->unp_buffer_size - rar->unp_offset))
2042 bs = rar->unp_buffer_size - rar->unp_offset;
2044 bs = (size_t)rar->bytes_uncopied;
2045 ret = copy_from_lzss_window(a, buff, rar->offset, (int)bs);
2046 if (ret != ARCHIVE_OK)
2049 rar->bytes_uncopied -= bs;
2051 * If *buff is NULL, it means unp_buffer is not full.
2052 * So we have to continue extracting a RAR file.
2054 } while (*buff == NULL);
2056 rar->unp_offset = 0;
2057 *size = rar->unp_buffer_size;
2058 *offset = rar->offset_outgoing;
2059 rar->offset_outgoing += *size;
2060 /* Calculate File CRC. */
2061 rar->crc_calculated = crc32(rar->crc_calculated, *buff, (unsigned)*size);
2066 parse_codes(struct archive_read *a)
2068 int i, j, val, n, r;
2069 unsigned char bitlengths[MAX_SYMBOLS], zerocount, ppmd_flags;
2070 unsigned int maxorder;
2071 struct huffman_code precode;
2072 struct rar *rar = (struct rar *)(a->format->data);
2073 struct rar_br *br = &(rar->br);
2077 /* Skip to the next byte */
2078 rar_br_consume_unalined_bits(br);
2080 /* PPMd block flag */
2081 if (!rar_br_read_ahead(a, br, 1))
2082 goto truncated_data;
2083 if ((rar->is_ppmd_block = rar_br_bits(br, 1)) != 0)
2085 rar_br_consume(br, 1);
2086 if (!rar_br_read_ahead(a, br, 7))
2087 goto truncated_data;
2088 ppmd_flags = rar_br_bits(br, 7);
2089 rar_br_consume(br, 7);
2091 /* Memory is allocated in MB */
2092 if (ppmd_flags & 0x20)
2094 if (!rar_br_read_ahead(a, br, 8))
2095 goto truncated_data;
2096 rar->dictionary_size = (rar_br_bits(br, 8) + 1) << 20;
2097 rar_br_consume(br, 8);
2100 if (ppmd_flags & 0x40)
2102 if (!rar_br_read_ahead(a, br, 8))
2103 goto truncated_data;
2104 rar->ppmd_escape = rar->ppmd7_context.InitEsc = rar_br_bits(br, 8);
2105 rar_br_consume(br, 8);
2108 rar->ppmd_escape = 2;
2110 if (ppmd_flags & 0x20)
2112 maxorder = (ppmd_flags & 0x1F) + 1;
2114 maxorder = 16 + (maxorder - 16) * 3;
2118 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
2119 "Truncated RAR file data");
2120 return (ARCHIVE_FATAL);
2123 /* Make sure ppmd7_contest is freed before Ppmd7_Construct
2124 * because reading a broken file cause this abnormal sequence. */
2125 __archive_ppmd7_functions.Ppmd7_Free(&rar->ppmd7_context, &g_szalloc);
2128 rar->bytein.Read = &ppmd_read;
2129 __archive_ppmd7_functions.PpmdRAR_RangeDec_CreateVTable(&rar->range_dec);
2130 rar->range_dec.Stream = &rar->bytein;
2131 __archive_ppmd7_functions.Ppmd7_Construct(&rar->ppmd7_context);
2133 if (rar->dictionary_size == 0) {
2134 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
2135 "Invalid zero dictionary size");
2136 return (ARCHIVE_FATAL);
2139 if (!__archive_ppmd7_functions.Ppmd7_Alloc(&rar->ppmd7_context,
2140 rar->dictionary_size, &g_szalloc))
2142 archive_set_error(&a->archive, ENOMEM,
2144 return (ARCHIVE_FATAL);
2146 if (!__archive_ppmd7_functions.PpmdRAR_RangeDec_Init(&rar->range_dec))
2148 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
2149 "Unable to initialize PPMd range decoder");
2150 return (ARCHIVE_FATAL);
2152 __archive_ppmd7_functions.Ppmd7_Init(&rar->ppmd7_context, maxorder);
2153 rar->ppmd_valid = 1;
2157 if (!rar->ppmd_valid) {
2158 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
2159 "Invalid PPMd sequence");
2160 return (ARCHIVE_FATAL);
2162 if (!__archive_ppmd7_functions.PpmdRAR_RangeDec_Init(&rar->range_dec))
2164 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
2165 "Unable to initialize PPMd range decoder");
2166 return (ARCHIVE_FATAL);
2172 rar_br_consume(br, 1);
2174 /* Keep existing table flag */
2175 if (!rar_br_read_ahead(a, br, 1))
2176 goto truncated_data;
2177 if (!rar_br_bits(br, 1))
2178 memset(rar->lengthtable, 0, sizeof(rar->lengthtable));
2179 rar_br_consume(br, 1);
2181 memset(&bitlengths, 0, sizeof(bitlengths));
2182 for (i = 0; i < MAX_SYMBOLS;)
2184 if (!rar_br_read_ahead(a, br, 4))
2185 goto truncated_data;
2186 bitlengths[i++] = rar_br_bits(br, 4);
2187 rar_br_consume(br, 4);
2188 if (bitlengths[i-1] == 0xF)
2190 if (!rar_br_read_ahead(a, br, 4))
2191 goto truncated_data;
2192 zerocount = rar_br_bits(br, 4);
2193 rar_br_consume(br, 4);
2197 for (j = 0; j < zerocount + 2 && i < MAX_SYMBOLS; j++)
2198 bitlengths[i++] = 0;
2203 memset(&precode, 0, sizeof(precode));
2204 r = create_code(a, &precode, bitlengths, MAX_SYMBOLS, MAX_SYMBOL_LENGTH);
2205 if (r != ARCHIVE_OK) {
2207 free(precode.table);
2211 for (i = 0; i < HUFFMAN_TABLE_SIZE;)
2213 if ((val = read_next_symbol(a, &precode)) < 0) {
2215 free(precode.table);
2216 return (ARCHIVE_FATAL);
2220 rar->lengthtable[i] = (rar->lengthtable[i] + val) & 0xF;
2228 free(precode.table);
2229 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
2230 "Internal error extracting RAR file.");
2231 return (ARCHIVE_FATAL);
2235 if (!rar_br_read_ahead(a, br, 3)) {
2237 free(precode.table);
2238 goto truncated_data;
2240 n = rar_br_bits(br, 3) + 3;
2241 rar_br_consume(br, 3);
2243 if (!rar_br_read_ahead(a, br, 7)) {
2245 free(precode.table);
2246 goto truncated_data;
2248 n = rar_br_bits(br, 7) + 11;
2249 rar_br_consume(br, 7);
2252 for (j = 0; j < n && i < HUFFMAN_TABLE_SIZE; j++)
2254 rar->lengthtable[i] = rar->lengthtable[i-1];
2261 if (!rar_br_read_ahead(a, br, 3)) {
2263 free(precode.table);
2264 goto truncated_data;
2266 n = rar_br_bits(br, 3) + 3;
2267 rar_br_consume(br, 3);
2269 if (!rar_br_read_ahead(a, br, 7)) {
2271 free(precode.table);
2272 goto truncated_data;
2274 n = rar_br_bits(br, 7) + 11;
2275 rar_br_consume(br, 7);
2278 for(j = 0; j < n && i < HUFFMAN_TABLE_SIZE; j++)
2279 rar->lengthtable[i++] = 0;
2283 free(precode.table);
2285 r = create_code(a, &rar->maincode, &rar->lengthtable[0], MAINCODE_SIZE,
2287 if (r != ARCHIVE_OK)
2289 r = create_code(a, &rar->offsetcode, &rar->lengthtable[MAINCODE_SIZE],
2290 OFFSETCODE_SIZE, MAX_SYMBOL_LENGTH);
2291 if (r != ARCHIVE_OK)
2293 r = create_code(a, &rar->lowoffsetcode,
2294 &rar->lengthtable[MAINCODE_SIZE + OFFSETCODE_SIZE],
2295 LOWOFFSETCODE_SIZE, MAX_SYMBOL_LENGTH);
2296 if (r != ARCHIVE_OK)
2298 r = create_code(a, &rar->lengthcode,
2299 &rar->lengthtable[MAINCODE_SIZE + OFFSETCODE_SIZE +
2300 LOWOFFSETCODE_SIZE], LENGTHCODE_SIZE, MAX_SYMBOL_LENGTH);
2301 if (r != ARCHIVE_OK)
2305 if (!rar->dictionary_size || !rar->lzss.window)
2307 /* Seems as though dictionary sizes are not used. Even so, minimize
2308 * memory usage as much as possible.
2311 unsigned int new_size;
2313 if (rar->unp_size >= DICTIONARY_MAX_SIZE)
2314 new_size = DICTIONARY_MAX_SIZE;
2316 new_size = rar_fls((unsigned int)rar->unp_size) << 1;
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 ret = archive_read_format_rar_read_header(a, a->entry);
2946 if (ret == (ARCHIVE_EOF))
2948 rar->has_endarc_header = 1;
2949 ret = archive_read_format_rar_read_header(a, a->entry);
2951 if (ret != (ARCHIVE_OK))
2953 return rar_read_ahead(a, min, avail);