diff options
Diffstat (limited to 'Utilities/cmlibarchive/libarchive/archive_read_support_format_rar.c')
| -rw-r--r-- | Utilities/cmlibarchive/libarchive/archive_read_support_format_rar.c | 468 |
1 files changed, 376 insertions, 92 deletions
diff --git a/Utilities/cmlibarchive/libarchive/archive_read_support_format_rar.c b/Utilities/cmlibarchive/libarchive/archive_read_support_format_rar.c index d5a8d86ee..dc1563d9e 100644 --- a/Utilities/cmlibarchive/libarchive/archive_read_support_format_rar.c +++ b/Utilities/cmlibarchive/libarchive/archive_read_support_format_rar.c @@ -136,7 +136,7 @@ #define MAX_SYMBOLS 20 /* - * Considering L1,L2 cache miss and a calling of write sytem-call, + * Considering L1,L2 cache miss and a calling of write system-call, * the best size of the output buffer(uncompressed buffer) is 128K. * If the structure of extracting process is changed, this value * might be researched again. @@ -199,6 +199,13 @@ struct lzss int64_t position; }; +struct data_block_offsets +{ + int64_t header_size; + int64_t start_offset; + int64_t end_offset; +}; + struct rar { /* Entries from main RAR header */ @@ -217,6 +224,7 @@ struct rar long mnsec; mode_t mode; char *filename; + char *filename_save; size_t filename_allocated; /* File header optional entries */ @@ -234,6 +242,7 @@ struct rar int64_t bytes_uncopied; int64_t offset; int64_t offset_outgoing; + int64_t offset_seek; char valid; unsigned int unp_offset; unsigned int unp_buffer_size; @@ -243,6 +252,10 @@ struct rar char entry_eof; unsigned long crc_calculated; int found_first_header; + char has_endarc_header; + struct data_block_offsets *dbo; + unsigned int cursor; + unsigned int nodes; /* LZSS members */ struct huffman_code maincode; @@ -301,11 +314,13 @@ static int archive_read_format_rar_read_header(struct archive_read *, static int archive_read_format_rar_read_data(struct archive_read *, const void **, size_t *, int64_t *); static int archive_read_format_rar_read_data_skip(struct archive_read *a); +static int64_t archive_read_format_rar_seek_data(struct archive_read *, int64_t, + int); static int archive_read_format_rar_cleanup(struct archive_read *); /* Support functions */ static int read_header(struct archive_read *, struct archive_entry *, char); -static time_t get_time(int time); +static time_t get_time(int); static int read_exttime(const char *, struct rar *, const char *); static int read_symlink_stored(struct archive_read *, struct archive_entry *, struct archive_string_conv *); @@ -328,6 +343,7 @@ static int make_table_recurse(struct archive_read *, struct huffman_code *, int, static int64_t expand(struct archive_read *, int64_t); static int copy_from_lzss_window(struct archive_read *, const void **, int64_t, int); +static const void *rar_read_ahead(struct archive_read *, size_t, ssize_t *); /* * Bit stream reader. @@ -449,11 +465,9 @@ rar_br_fillup(struct archive_read *a, struct rar_br *br) __archive_read_consume(a, rar->bytes_unconsumed); rar->bytes_unconsumed = 0; } - br->next_in = __archive_read_ahead(a, 1, &(br->avail_in)); + br->next_in = rar_read_ahead(a, 1, &(br->avail_in)); if (br->next_in == NULL) return (0); - if (br->avail_in > rar->bytes_remaining) - br->avail_in = rar->bytes_remaining; if (br->avail_in == 0) return (0); } @@ -473,15 +487,13 @@ rar_br_preparation(struct archive_read *a, struct rar_br *br) struct rar *rar = (struct rar *)(a->format->data); if (rar->bytes_remaining > 0) { - br->next_in = __archive_read_ahead(a, 1, &(br->avail_in)); + br->next_in = rar_read_ahead(a, 1, &(br->avail_in)); if (br->next_in == NULL) { archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT, "Truncated RAR file data"); return (ARCHIVE_FATAL); } - if (br->avail_in > rar->bytes_remaining) - br->avail_in = rar->bytes_remaining; if (br->cache_avail == 0) (void)rar_br_fillup(a, br); } @@ -522,7 +534,7 @@ lzss_size(struct lzss *lzss) static inline int lzss_offset_for_position(struct lzss *lzss, int64_t pos) { - return pos & lzss->mask; + return (int)(pos & lzss->mask); } static inline unsigned char * @@ -642,6 +654,7 @@ archive_read_support_format_rar(struct archive *_a) archive_read_format_rar_read_header, archive_read_format_rar_read_data, archive_read_format_rar_read_data_skip, + archive_read_format_rar_seek_data, archive_read_format_rar_cleanup); if (r != ARCHIVE_OK) @@ -757,11 +770,13 @@ archive_read_format_rar_options(struct archive_read *a, else ret = ARCHIVE_FATAL; } - } else - archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC, - "rar: unknown keyword ``%s''", key); - - return (ret); + return (ret); + } + + /* Note: The "warn" return is just to inform the options + * supervisor that we didn't handle it. It will generate + * a suitable error if no one used this option. */ + return (ARCHIVE_WARN); } static int @@ -842,13 +857,6 @@ archive_read_format_rar_read_header(struct archive_read *a, sizeof(rar->reserved2)); } - if (rar->main_flags & MHD_VOLUME || - rar->main_flags & MHD_FIRSTVOLUME) - { - archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT, - "RAR volume support unavailable."); - return (ARCHIVE_FATAL); - } if (rar->main_flags & MHD_PASSWORD) { archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT, @@ -856,7 +864,7 @@ archive_read_format_rar_read_header(struct archive_read *a, return (ARCHIVE_FATAL); } - crc32_val = crc32(0, (const unsigned char *)p + 2, skip - 2); + crc32_val = crc32(0, (const unsigned char *)p + 2, (unsigned)skip - 2); if ((crc32_val & 0xffff) != archive_le16dec(p)) { archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT, "Header CRC error"); @@ -873,6 +881,7 @@ archive_read_format_rar_read_header(struct archive_read *a, case SUB_HEAD: case PROTECT_HEAD: case SIGN_HEAD: + case ENDARC_HEAD: flags = archive_le16dec(p + 3); skip = archive_le16dec(p + 5); if (skip < 7) { @@ -898,13 +907,15 @@ archive_read_format_rar_read_header(struct archive_read *a, p = h; } - crc32_val = crc32(0, (const unsigned char *)p + 2, skip - 2); + crc32_val = crc32(0, (const unsigned char *)p + 2, (unsigned)skip - 2); if ((crc32_val & 0xffff) != archive_le16dec(p)) { archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT, "Header CRC error"); return (ARCHIVE_FATAL); } __archive_read_consume(a, skip); + if (head_type == ENDARC_HEAD) + return (ARCHIVE_EOF); break; case NEWSUB_HEAD: @@ -912,9 +923,6 @@ archive_read_format_rar_read_header(struct archive_read *a, return ret; break; - case ENDARC_HEAD: - return (ARCHIVE_EOF); - default: archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT, "Bad RAR file"); @@ -936,10 +944,12 @@ archive_read_format_rar_read_data(struct archive_read *a, const void **buff, rar->bytes_unconsumed = 0; } - if (rar->entry_eof) { + if (rar->entry_eof || rar->offset_seek >= rar->unp_size) { *buff = NULL; *size = 0; *offset = rar->offset; + if (*offset < rar->unp_size) + *offset = rar->unp_size; return (ARCHIVE_EOF); } @@ -973,6 +983,7 @@ archive_read_format_rar_read_data_skip(struct archive_read *a) { struct rar *rar; int64_t bytes_skipped; + int ret; rar = (struct rar *)(a->format->data); @@ -987,9 +998,179 @@ archive_read_format_rar_read_data_skip(struct archive_read *a) if (bytes_skipped < 0) return (ARCHIVE_FATAL); } + + /* Compressed data to skip must be read from each header in a multivolume + * archive. + */ + if (rar->main_flags & MHD_VOLUME && rar->file_flags & FHD_SPLIT_AFTER) + { + ret = archive_read_format_rar_read_header(a, a->entry); + if (ret == (ARCHIVE_EOF)) + ret = archive_read_format_rar_read_header(a, a->entry); + if (ret != (ARCHIVE_OK)) + return ret; + return archive_read_format_rar_read_data_skip(a); + } + return (ARCHIVE_OK); } +static int64_t +archive_read_format_rar_seek_data(struct archive_read *a, int64_t offset, + int whence) +{ + int64_t client_offset, ret; + unsigned int i; + struct rar *rar = (struct rar *)(a->format->data); + + if (rar->compression_method == COMPRESS_METHOD_STORE) + { + /* Modify the offset for use with SEEK_SET */ + switch (whence) + { + case SEEK_CUR: + client_offset = rar->offset_seek; + break; + case SEEK_END: + client_offset = rar->unp_size; + break; + case SEEK_SET: + default: + client_offset = 0; + } + client_offset += offset; + if (client_offset < 0) + { + /* Can't seek past beginning of data block */ + return -1; + } + else if (client_offset > rar->unp_size) + { + /* + * Set the returned offset but only seek to the end of + * the data block. + */ + rar->offset_seek = client_offset; + client_offset = rar->unp_size; + } + + client_offset += rar->dbo[0].start_offset; + i = 0; + while (i < rar->cursor) + { + i++; + client_offset += rar->dbo[i].start_offset - rar->dbo[i-1].end_offset; + } + if (rar->main_flags & MHD_VOLUME) + { + /* Find the appropriate offset among the multivolume archive */ + while (1) + { + if (client_offset < rar->dbo[rar->cursor].start_offset && + rar->file_flags & FHD_SPLIT_BEFORE) + { + /* Search backwards for the correct data block */ + if (rar->cursor == 0) + { + archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC, + "Attempt to seek past beginning of RAR data block"); + return (ARCHIVE_FAILED); + } + rar->cursor--; + client_offset -= rar->dbo[rar->cursor+1].start_offset - + rar->dbo[rar->cursor].end_offset; + if (client_offset < rar->dbo[rar->cursor].start_offset) + continue; + ret = __archive_read_seek(a, rar->dbo[rar->cursor].start_offset - + rar->dbo[rar->cursor].header_size, SEEK_SET); + if (ret < (ARCHIVE_OK)) + return ret; + ret = archive_read_format_rar_read_header(a, a->entry); + if (ret != (ARCHIVE_OK)) + { + archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC, + "Error during seek of RAR file"); + return (ARCHIVE_FAILED); + } + rar->cursor--; + break; + } + else if (client_offset > rar->dbo[rar->cursor].end_offset && + rar->file_flags & FHD_SPLIT_AFTER) + { + /* Search forward for the correct data block */ + rar->cursor++; + if (rar->cursor < rar->nodes && + client_offset > rar->dbo[rar->cursor].end_offset) + { + client_offset += rar->dbo[rar->cursor].start_offset - + rar->dbo[rar->cursor-1].end_offset; + continue; + } + rar->cursor--; + ret = __archive_read_seek(a, rar->dbo[rar->cursor].end_offset, + SEEK_SET); + if (ret < (ARCHIVE_OK)) + return ret; + ret = archive_read_format_rar_read_header(a, a->entry); + if (ret == (ARCHIVE_EOF)) + { + rar->has_endarc_header = 1; + ret = archive_read_format_rar_read_header(a, a->entry); + } + if (ret != (ARCHIVE_OK)) + { + archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC, + "Error during seek of RAR file"); + return (ARCHIVE_FAILED); + } + client_offset += rar->dbo[rar->cursor].start_offset - + rar->dbo[rar->cursor-1].end_offset; + continue; + } + break; + } + } + + ret = __archive_read_seek(a, client_offset, SEEK_SET); + if (ret < (ARCHIVE_OK)) + return ret; + rar->bytes_remaining = rar->dbo[rar->cursor].end_offset - ret; + i = rar->cursor; + while (i > 0) + { + i--; + ret -= rar->dbo[i+1].start_offset - rar->dbo[i].end_offset; + } + ret -= rar->dbo[0].start_offset; + + /* Always restart reading the file after a seek */ + a->read_data_block = NULL; + a->read_data_offset = 0; + a->read_data_output_offset = 0; + a->read_data_remaining = 0; + rar->bytes_unconsumed = 0; + rar->offset = 0; + + /* + * If a seek past the end of file was requested, return the requested + * offset. + */ + if (ret == rar->unp_size && rar->offset_seek > rar->unp_size) + return rar->offset_seek; + + /* Return the new offset */ + rar->offset_seek = ret; + return rar->offset_seek; + } + else + { + archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC, + "Seeking of compressed RAR files is unsupported"); + } + return (ARCHIVE_FAILED); +} + static int archive_read_format_rar_cleanup(struct archive_read *a) { @@ -998,6 +1179,8 @@ archive_read_format_rar_cleanup(struct archive_read *a) rar = (struct rar *)(a->format->data); free_codes(a); free(rar->filename); + free(rar->filename_save); + free(rar->dbo); free(rar->unp_buffer); free(rar->lzss.window); __archive_ppmd7_functions.Ppmd7_Free(&rar->ppmd7_context, &g_szalloc); @@ -1021,7 +1204,7 @@ read_header(struct archive_read *a, struct archive_entry *entry, char *strp; char packed_size[8]; char unp_size[8]; - int time; + int ttime; struct archive_string_conv *sconv, *fn_sconv; unsigned long crc32_val; int ret = (ARCHIVE_OK), ret2; @@ -1047,7 +1230,7 @@ read_header(struct archive_read *a, struct archive_entry *entry, memcpy(&rar_header, p, sizeof(rar_header)); rar->file_flags = archive_le16dec(rar_header.flags); header_size = archive_le16dec(rar_header.size); - if (header_size < sizeof(file_header) + 7) { + if (header_size < (int64_t)sizeof(file_header) + 7) { archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT, "Invalid header size"); return (ARCHIVE_FATAL); @@ -1082,11 +1265,11 @@ read_header(struct archive_read *a, struct archive_entry *entry, return (ARCHIVE_FATAL); } - if ((h = __archive_read_ahead(a, header_size - 7, NULL)) == NULL) + if ((h = __archive_read_ahead(a, (size_t)header_size - 7, NULL)) == NULL) return (ARCHIVE_FATAL); /* File Header CRC check. */ - crc32_val = crc32(crc32_val, h, header_size - 7); + crc32_val = crc32(crc32_val, h, (unsigned)(header_size - 7)); if ((crc32_val & 0xffff) != archive_le16dec(rar_header.crc)) { archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT, "Header CRC error"); @@ -1100,8 +1283,8 @@ read_header(struct archive_read *a, struct archive_entry *entry, rar->compression_method = file_header.method; - time = archive_le32dec(file_header.file_time); - rar->mtime = get_time(time); + ttime = archive_le32dec(file_header.file_time); + rar->mtime = get_time(ttime); rar->file_crc = archive_le32dec(file_header.file_crc); @@ -1129,9 +1312,6 @@ read_header(struct archive_read *a, struct archive_entry *entry, rar->unp_size = archive_le32dec(file_header.unp_size); } - /* TODO: Need to use CRC check for these kind of cases. - * For now, check if sizes are not < 0. - */ if (rar->packed_size < 0 || rar->unp_size < 0) { archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT, @@ -1139,6 +1319,8 @@ read_header(struct archive_read *a, struct archive_entry *entry, return (ARCHIVE_FATAL); } + rar->bytes_remaining = rar->packed_size; + /* TODO: RARv3 subblocks contain comments. For now the complete block is * consumed at the end. */ @@ -1146,7 +1328,7 @@ read_header(struct archive_read *a, struct archive_entry *entry, size_t distance = p - (const char *)h; header_size += rar->packed_size; /* Make sure we have the extended data. */ - if ((h = __archive_read_ahead(a, header_size - 7, NULL)) == NULL) + if ((h = __archive_read_ahead(a, (size_t)header_size - 7, NULL)) == NULL) return (ARCHIVE_FATAL); p = h; endp = p + header_size - 7; @@ -1159,13 +1341,17 @@ read_header(struct archive_read *a, struct archive_entry *entry, "Invalid filename size"); return (ARCHIVE_FATAL); } - if (rar->filename_allocated < filename_size+2) { - rar->filename = realloc(rar->filename, filename_size+2); - if (rar->filename == NULL) { + if (rar->filename_allocated < filename_size * 2 + 2) { + char *newptr; + size_t newsize = filename_size * 2 + 2; + newptr = realloc(rar->filename, newsize); + if (newptr == NULL) { archive_set_error(&a->archive, ENOMEM, "Couldn't allocate memory."); return (ARCHIVE_FATAL); } + rar->filename = newptr; + rar->filename_allocated = newsize; } filename = rar->filename; memcpy(filename, p, filename_size); @@ -1174,15 +1360,17 @@ read_header(struct archive_read *a, struct archive_entry *entry, { if (filename_size != strlen(filename)) { - unsigned char highbyte, flagbits, flagbyte, length, offset; + unsigned char highbyte, flagbits, flagbyte; + unsigned fn_end, offset; end = filename_size; + fn_end = filename_size * 2; filename_size = 0; - offset = strlen(filename) + 1; + offset = (unsigned)strlen(filename) + 1; highbyte = *(p + offset++); flagbits = 0; flagbyte = 0; - while (offset < end && filename_size < end) + while (offset < end && filename_size < fn_end) { if (!flagbits) { @@ -1208,19 +1396,26 @@ read_header(struct archive_read *a, struct archive_entry *entry, break; case 3: { - length = *(p + offset++); - while (length) - { - if (filename_size >= end) - break; - filename[filename_size++] = *(p + offset); + char extra, high; + uint8_t length = *(p + offset++); + + if (length & 0x80) { + extra = *(p + offset++); + high = (char)highbyte; + } else + extra = high = 0; + length = (length & 0x7f) + 2; + while (length && filename_size < fn_end) { + unsigned cp = filename_size >> 1; + filename[filename_size++] = high; + filename[filename_size++] = p[cp] + extra; length--; } } break; } } - if (filename_size >= end) { + if (filename_size > fn_end) { archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT, "Invalid filename"); return (ARCHIVE_FATAL); @@ -1272,6 +1467,51 @@ read_header(struct archive_read *a, struct archive_entry *entry, p += filename_size; } + /* Split file in multivolume RAR. No more need to process header. */ + if (rar->filename_save && + !memcmp(rar->filename, rar->filename_save, filename_size + 1)) + { + __archive_read_consume(a, header_size - 7); + rar->cursor++; + if (rar->cursor >= rar->nodes) + { + rar->nodes++; + if ((rar->dbo = + realloc(rar->dbo, sizeof(*rar->dbo) * rar->nodes)) == NULL) + { + archive_set_error(&a->archive, ENOMEM, "Couldn't allocate memory."); + return (ARCHIVE_FATAL); + } + rar->dbo[rar->cursor].header_size = header_size; + rar->dbo[rar->cursor].start_offset = -1; + rar->dbo[rar->cursor].end_offset = -1; + } + if (rar->dbo[rar->cursor].start_offset < 0) + { + rar->dbo[rar->cursor].start_offset = a->filter->position; + rar->dbo[rar->cursor].end_offset = rar->dbo[rar->cursor].start_offset + + rar->packed_size; + } + return ret; + } + + rar->filename_save = (char*)realloc(rar->filename_save, + filename_size + 1); + memcpy(rar->filename_save, rar->filename, filename_size + 1); + + /* Set info for seeking */ + free(rar->dbo); + if ((rar->dbo = calloc(1, sizeof(*rar->dbo))) == NULL) + { + archive_set_error(&a->archive, ENOMEM, "Couldn't allocate memory."); + return (ARCHIVE_FATAL); + } + rar->dbo[0].header_size = header_size; + rar->dbo[0].start_offset = -1; + rar->dbo[0].end_offset = -1; + rar->cursor = 0; + rar->nodes = 1; + if (rar->file_flags & FHD_SALT) { if (p + 8 > endp) { @@ -1292,6 +1532,8 @@ read_header(struct archive_read *a, struct archive_entry *entry, } __archive_read_consume(a, header_size - 7); + rar->dbo[0].start_offset = a->filter->position; + rar->dbo[0].end_offset = rar->dbo[0].start_offset + rar->packed_size; switch(file_header.host_os) { @@ -1318,9 +1560,10 @@ read_header(struct archive_read *a, struct archive_entry *entry, return (ARCHIVE_FATAL); } - rar->bytes_remaining = rar->packed_size; rar->bytes_uncopied = rar->bytes_unconsumed = 0; - rar->lzss.position = rar->dictionary_size = rar->offset = 0; + rar->lzss.position = rar->offset = 0; + rar->offset_seek = 0; + rar->dictionary_size = 0; rar->offset_outgoing = 0; rar->br.cache_avail = 0; rar->br.avail_in = 0; @@ -1381,15 +1624,15 @@ read_header(struct archive_read *a, struct archive_entry *entry, } static time_t -get_time(int time) +get_time(int ttime) { struct tm tm; - tm.tm_sec = 2 * (time & 0x1f); - tm.tm_min = (time >> 5) & 0x3f; - tm.tm_hour = (time >> 11) & 0x1f; - tm.tm_mday = (time >> 16) & 0x1f; - tm.tm_mon = ((time >> 21) & 0x0f) - 1; - tm.tm_year = ((time >> 25) & 0x7f) + 80; + tm.tm_sec = 2 * (ttime & 0x1f); + tm.tm_min = (ttime >> 5) & 0x3f; + tm.tm_hour = (ttime >> 11) & 0x1f; + tm.tm_mday = (ttime >> 16) & 0x1f; + tm.tm_mon = ((ttime >> 21) & 0x0f) - 1; + tm.tm_year = ((ttime >> 25) & 0x7f) + 80; tm.tm_isdst = -1; return mktime(&tm); } @@ -1398,7 +1641,7 @@ static int read_exttime(const char *p, struct rar *rar, const char *endp) { unsigned rmode, flags, rem, j, count; - int time, i; + int ttime, i; struct tm *tm; time_t t; long nsec; @@ -1420,8 +1663,8 @@ read_exttime(const char *p, struct rar *rar, const char *endp) { if (p + 4 > endp) return (-1); - time = archive_le32dec(p); - t = get_time(time); + ttime = archive_le32dec(p); + t = get_time(ttime); p += 4; } rem = 0; @@ -1475,11 +1718,12 @@ read_symlink_stored(struct archive_read *a, struct archive_entry *entry, int ret = (ARCHIVE_OK); rar = (struct rar *)(a->format->data); - if ((h = __archive_read_ahead(a, rar->packed_size, NULL)) == NULL) + if ((h = rar_read_ahead(a, (size_t)rar->packed_size, NULL)) == NULL) return (ARCHIVE_FATAL); p = h; - if (archive_entry_copy_symlink_l(entry, p, rar->packed_size, sconv)) + if (archive_entry_copy_symlink_l(entry, + p, (size_t)rar->packed_size, sconv)) { if (errno == ENOMEM) { @@ -1504,7 +1748,8 @@ read_data_stored(struct archive_read *a, const void **buff, size_t *size, ssize_t bytes_avail; rar = (struct rar *)(a->format->data); - if (rar->bytes_remaining == 0) + if (rar->bytes_remaining == 0 && + !(rar->main_flags & MHD_VOLUME && rar->file_flags & FHD_SPLIT_AFTER)) { *buff = NULL; *size = 0; @@ -1518,23 +1763,23 @@ read_data_stored(struct archive_read *a, const void **buff, size_t *size, return (ARCHIVE_EOF); } - *buff = __archive_read_ahead(a, 1, &bytes_avail); + *buff = rar_read_ahead(a, 1, &bytes_avail); if (bytes_avail <= 0) { archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT, "Truncated RAR file data"); return (ARCHIVE_FATAL); } - if (bytes_avail > rar->bytes_remaining) - bytes_avail = rar->bytes_remaining; *size = bytes_avail; *offset = rar->offset; rar->offset += bytes_avail; + rar->offset_seek += bytes_avail; rar->bytes_remaining -= bytes_avail; rar->bytes_unconsumed = bytes_avail; /* Calculate File CRC. */ - rar->crc_calculated = crc32(rar->crc_calculated, *buff, bytes_avail); + rar->crc_calculated = crc32(rar->crc_calculated, *buff, + (unsigned)bytes_avail); return (ARCHIVE_OK); } @@ -1564,7 +1809,8 @@ read_data_compressed(struct archive_read *a, const void **buff, size_t *size, *offset = rar->offset_outgoing; rar->offset_outgoing += *size; /* Calculate File CRC. */ - rar->crc_calculated = crc32(rar->crc_calculated, *buff, *size); + rar->crc_calculated = crc32(rar->crc_calculated, *buff, + (unsigned)*size); rar->unp_offset = 0; return (ARCHIVE_OK); } @@ -1585,8 +1831,8 @@ read_data_compressed(struct archive_read *a, const void **buff, size_t *size, if (rar->bytes_uncopied > (rar->unp_buffer_size - rar->unp_offset)) bs = rar->unp_buffer_size - rar->unp_offset; else - bs = rar->bytes_uncopied; - ret = copy_from_lzss_window(a, buff, rar->offset, bs); + bs = (size_t)rar->bytes_uncopied; + ret = copy_from_lzss_window(a, buff, rar->offset, (int)bs); if (ret != ARCHIVE_OK) return (ret); rar->offset += bs; @@ -1597,7 +1843,8 @@ read_data_compressed(struct archive_read *a, const void **buff, size_t *size, *offset = rar->offset_outgoing; rar->offset_outgoing += *size; /* Calculate File CRC. */ - rar->crc_calculated = crc32(rar->crc_calculated, *buff, *size); + rar->crc_calculated = crc32(rar->crc_calculated, *buff, + (unsigned)*size); return (ret); } continue; @@ -1713,8 +1960,8 @@ read_data_compressed(struct archive_read *a, const void **buff, size_t *size, if (rar->bytes_uncopied > (rar->unp_buffer_size - rar->unp_offset)) bs = rar->unp_buffer_size - rar->unp_offset; else - bs = rar->bytes_uncopied; - ret = copy_from_lzss_window(a, buff, rar->offset, bs); + bs = (size_t)rar->bytes_uncopied; + ret = copy_from_lzss_window(a, buff, rar->offset, (int)bs); if (ret != ARCHIVE_OK) return (ret); rar->offset += bs; @@ -1730,7 +1977,7 @@ read_data_compressed(struct archive_read *a, const void **buff, size_t *size, *offset = rar->offset_outgoing; rar->offset_outgoing += *size; /* Calculate File CRC. */ - rar->crc_calculated = crc32(rar->crc_calculated, *buff, *size); + rar->crc_calculated = crc32(rar->crc_calculated, *buff, (unsigned)*size); return ret; } @@ -1973,17 +2220,21 @@ parse_codes(struct archive_read *a) /* Seems as though dictionary sizes are not used. Even so, minimize * memory usage as much as possible. */ + void *new_window; + unsigned int new_size; + if (rar->unp_size >= DICTIONARY_MAX_SIZE) - rar->dictionary_size = DICTIONARY_MAX_SIZE; + new_size = DICTIONARY_MAX_SIZE; else - rar->dictionary_size = rar_fls(rar->unp_size) << 1; - rar->lzss.window = (unsigned char *)realloc(rar->lzss.window, - rar->dictionary_size); - if (rar->lzss.window == NULL) { + new_size = rar_fls((unsigned int)rar->unp_size) << 1; + new_window = realloc(rar->lzss.window, new_size); + if (new_window == NULL) { archive_set_error(&a->archive, ENOMEM, "Unable to allocate memory for uncompressed data."); return (ARCHIVE_FATAL); } + rar->lzss.window = (unsigned char *)new_window; + rar->dictionary_size = new_size; memset(rar->lzss.window, 0, rar->dictionary_size); rar->lzss.mask = rar->dictionary_size - 1; } @@ -2221,10 +2472,12 @@ add_value(struct archive_read *a, struct huffman_code *code, int value, static int new_node(struct huffman_code *code) { - code->tree = (struct huffman_tree_node *)realloc(code->tree, - (code->numentries + 1) * sizeof(*code->tree)); - if (code->tree == NULL) + void *new_tree; + + new_tree = realloc(code->tree, (code->numentries + 1) * sizeof(*code->tree)); + if (new_tree == NULL) return (-1); + code->tree = (struct huffman_tree_node *)new_tree; code->tree[code->numentries].branches[0] = -1; code->tree[code->numentries].branches[1] = -2; return 1; @@ -2239,8 +2492,8 @@ make_table(struct archive_read *a, struct huffman_code *code) code->tablesize = code->maxlength; code->table = - (struct huffman_table_entry *)malloc(sizeof(*code->table) - * (1 << code->tablesize)); + (struct huffman_table_entry *)calloc(1, sizeof(*code->table) + * ((size_t)1 << code->tablesize)); return make_table_recurse(a, code, 0, code->table, 0, code->tablesize); } @@ -2408,9 +2661,9 @@ expand(struct archive_read *a, int64_t end) if ((lensymbol = read_next_symbol(a, &rar->lengthcode)) < 0) goto bad_data; - if (lensymbol > sizeof(lengthbases)/sizeof(lengthbases[0])) + if (lensymbol > (int)(sizeof(lengthbases)/sizeof(lengthbases[0]))) goto bad_data; - if (lensymbol > sizeof(lengthbits)/sizeof(lengthbits[0])) + if (lensymbol > (int)(sizeof(lengthbits)/sizeof(lengthbits[0]))) goto bad_data; len = lengthbases[lensymbol] + 2; if (lengthbits[lensymbol] > 0) { @@ -2442,9 +2695,9 @@ expand(struct archive_read *a, int64_t end) } else { - if (symbol-271 > sizeof(lengthbases)/sizeof(lengthbases[0])) + if (symbol-271 > (int)(sizeof(lengthbases)/sizeof(lengthbases[0]))) goto bad_data; - if (symbol-271 > sizeof(lengthbits)/sizeof(lengthbits[0])) + if (symbol-271 > (int)(sizeof(lengthbits)/sizeof(lengthbits[0]))) goto bad_data; len = lengthbases[symbol-271]+3; if(lengthbits[symbol-271] > 0) { @@ -2456,9 +2709,9 @@ expand(struct archive_read *a, int64_t end) if ((offssymbol = read_next_symbol(a, &rar->offsetcode)) < 0) goto bad_data; - if (offssymbol > sizeof(offsetbases)/sizeof(offsetbases[0])) + if (offssymbol > (int)(sizeof(offsetbases)/sizeof(offsetbases[0]))) goto bad_data; - if (offssymbol > sizeof(offsetbits)/sizeof(offsetbits[0])) + if (offssymbol > (int)(sizeof(offsetbits)/sizeof(offsetbits[0]))) goto bad_data; offs = offsetbases[offssymbol]+1; if(offsetbits[offssymbol] > 0) @@ -2572,3 +2825,34 @@ copy_from_lzss_window(struct archive_read *a, const void **buffer, *buffer = NULL; return (ARCHIVE_OK); } + +static const void * +rar_read_ahead(struct archive_read *a, size_t min, ssize_t *avail) +{ + struct rar *rar = (struct rar *)(a->format->data); + const void *h = __archive_read_ahead(a, min, avail); + int ret; + if (avail) + { + if (a->read_data_is_posix_read && *avail > (ssize_t)a->read_data_requested) + *avail = a->read_data_requested; + if (*avail > rar->bytes_remaining) + *avail = (ssize_t)rar->bytes_remaining; + if (*avail < 0) + return NULL; + else if (*avail == 0 && rar->main_flags & MHD_VOLUME && + rar->file_flags & FHD_SPLIT_AFTER) + { + ret = archive_read_format_rar_read_header(a, a->entry); + if (ret == (ARCHIVE_EOF)) + { + rar->has_endarc_header = 1; + ret = archive_read_format_rar_read_header(a, a->entry); + } + if (ret != (ARCHIVE_OK)) + return NULL; + return rar_read_ahead(a, min, avail); + } + } + return h; +} |