/*- * Copyright (c) 2003-2007 Tim Kientzle * Copyright (c) 2009 Andreas Henriksson * Copyright (c) 2009-2012 Michihiro NAKAJIMA * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #include "archive_platform.h" __FBSDID("$FreeBSD: head/lib/libarchive/archive_read_support_format_iso9660.c 201246 2009-12-30 05:30:35Z kientzle $"); #ifdef HAVE_ERRNO_H #include #endif /* #include */ /* See archive_platform.h */ #include #ifdef HAVE_STDLIB_H #include #endif #ifdef HAVE_STRING_H #include #endif #include #ifdef HAVE_ZLIB_H #include #endif #include "archive.h" #include "archive_endian.h" #include "archive_entry.h" #include "archive_entry_locale.h" #include "archive_private.h" #include "archive_read_private.h" #include "archive_string.h" /* * An overview of ISO 9660 format: * * Each disk is laid out as follows: * * 32k reserved for private use * * Volume descriptor table. Each volume descriptor * is 2k and specifies basic format information. * The "Primary Volume Descriptor" (PVD) is defined by the * standard and should always be present; other volume * descriptors include various vendor-specific extensions. * * Files and directories. Each file/dir is specified by * an "extent" (starting sector and length in bytes). * Dirs are just files with directory records packed one * after another. The PVD contains a single dir entry * specifying the location of the root directory. Everything * else follows from there. * * This module works by first reading the volume descriptors, then * building a list of directory entries, sorted by starting * sector. At each step, I look for the earliest dir entry that * hasn't yet been read, seek forward to that location and read * that entry. If it's a dir, I slurp in the new dir entries and * add them to the heap; if it's a regular file, I return the * corresponding archive_entry and wait for the client to request * the file body. This strategy allows us to read most compliant * CDs with a single pass through the data, as required by libarchive. */ #define LOGICAL_BLOCK_SIZE 2048 #define SYSTEM_AREA_BLOCK 16 /* Structure of on-disk primary volume descriptor. */ #define PVD_type_offset 0 #define PVD_type_size 1 #define PVD_id_offset (PVD_type_offset + PVD_type_size) #define PVD_id_size 5 #define PVD_version_offset (PVD_id_offset + PVD_id_size) #define PVD_version_size 1 #define PVD_reserved1_offset (PVD_version_offset + PVD_version_size) #define PVD_reserved1_size 1 #define PVD_system_id_offset (PVD_reserved1_offset + PVD_reserved1_size) #define PVD_system_id_size 32 #define PVD_volume_id_offset (PVD_system_id_offset + PVD_system_id_size) #define PVD_volume_id_size 32 #define PVD_reserved2_offset (PVD_volume_id_offset + PVD_volume_id_size) #define PVD_reserved2_size 8 #define PVD_volume_space_size_offset (PVD_reserved2_offset + PVD_reserved2_size) #define PVD_volume_space_size_size 8 #define PVD_reserved3_offset (PVD_volume_space_size_offset + PVD_volume_space_size_size) #define PVD_reserved3_size 32 #define PVD_volume_set_size_offset (PVD_reserved3_offset + PVD_reserved3_size) #define PVD_volume_set_size_size 4 #define PVD_volume_sequence_number_offset (PVD_volume_set_size_offset + PVD_volume_set_size_size) #define PVD_volume_sequence_number_size 4 #define PVD_logical_block_size_offset (PVD_volume_sequence_number_offset + PVD_volume_sequence_number_size) #define PVD_logical_block_size_size 4 #define PVD_path_table_size_offset (PVD_logical_block_size_offset + PVD_logical_block_size_size) #define PVD_path_table_size_size 8 #define PVD_type_1_path_table_offset (PVD_path_table_size_offset + PVD_path_table_size_size) #define PVD_type_1_path_table_size 4 #define PVD_opt_type_1_path_table_offset (PVD_type_1_path_table_offset + PVD_type_1_path_table_size) #define PVD_opt_type_1_path_table_size 4 #define PVD_type_m_path_table_offset (PVD_opt_type_1_path_table_offset + PVD_opt_type_1_path_table_size) #define PVD_type_m_path_table_size 4 #define PVD_opt_type_m_path_table_offset (PVD_type_m_path_table_offset + PVD_type_m_path_table_size) #define PVD_opt_type_m_path_table_size 4 #define PVD_root_directory_record_offset (PVD_opt_type_m_path_table_offset + PVD_opt_type_m_path_table_size) #define PVD_root_directory_record_size 34 #define PVD_volume_set_id_offset (PVD_root_directory_record_offset + PVD_root_directory_record_size) #define PVD_volume_set_id_size 128 #define PVD_publisher_id_offset (PVD_volume_set_id_offset + PVD_volume_set_id_size) #define PVD_publisher_id_size 128 #define PVD_preparer_id_offset (PVD_publisher_id_offset + PVD_publisher_id_size) #define PVD_preparer_id_size 128 #define PVD_application_id_offset (PVD_preparer_id_offset + PVD_preparer_id_size) #define PVD_application_id_size 128 #define PVD_copyright_file_id_offset (PVD_application_id_offset + PVD_application_id_size) #define PVD_copyright_file_id_size 37 #define PVD_abstract_file_id_offset (PVD_copyright_file_id_offset + PVD_copyright_file_id_size) #define PVD_abstract_file_id_size 37 #define PVD_bibliographic_file_id_offset (PVD_abstract_file_id_offset + PVD_abstract_file_id_size) #define PVD_bibliographic_file_id_size 37 #define PVD_creation_date_offset (PVD_bibliographic_file_id_offset + PVD_bibliographic_file_id_size) #define PVD_creation_date_size 17 #define PVD_modification_date_offset (PVD_creation_date_offset + PVD_creation_date_size) #define PVD_modification_date_size 17 #define PVD_expiration_date_offset (PVD_modification_date_offset + PVD_modification_date_size) #define PVD_expiration_date_size 17 #define PVD_effective_date_offset (PVD_expiration_date_offset + PVD_expiration_date_size) #define PVD_effective_date_size 17 #define PVD_file_structure_version_offset (PVD_effective_date_offset + PVD_effective_date_size) #define PVD_file_structure_version_size 1 #define PVD_reserved4_offset (PVD_file_structure_version_offset + PVD_file_structure_version_size) #define PVD_reserved4_size 1 #define PVD_application_data_offset (PVD_reserved4_offset + PVD_reserved4_size) #define PVD_application_data_size 512 #define PVD_reserved5_offset (PVD_application_data_offset + PVD_application_data_size) #define PVD_reserved5_size (2048 - PVD_reserved5_offset) /* TODO: It would make future maintenance easier to just hardcode the * above values. In particular, ECMA119 states the offsets as part of * the standard. That would eliminate the need for the following check.*/ #if PVD_reserved5_offset != 1395 #error PVD offset and size definitions are wrong. #endif /* Structure of optional on-disk supplementary volume descriptor. */ #define SVD_type_offset 0 #define SVD_type_size 1 #define SVD_id_offset (SVD_type_offset + SVD_type_size) #define SVD_id_size 5 #define SVD_version_offset (SVD_id_offset + SVD_id_size) #define SVD_version_size 1 /* ... */ #define SVD_reserved1_offset 72 #define SVD_reserved1_size 8 #define SVD_volume_space_size_offset 80 #define SVD_volume_space_size_size 8 #define SVD_escape_sequences_offset (SVD_volume_space_size_offset + SVD_volume_space_size_size) #define SVD_escape_sequences_size 32 /* ... */ #define SVD_logical_block_size_offset 128 #define SVD_logical_block_size_size 4 #define SVD_type_L_path_table_offset 140 #define SVD_type_M_path_table_offset 148 /* ... */ #define SVD_root_directory_record_offset 156 #define SVD_root_directory_record_size 34 #define SVD_file_structure_version_offset 881 #define SVD_reserved2_offset 882 #define SVD_reserved2_size 1 #define SVD_reserved3_offset 1395 #define SVD_reserved3_size 653 /* ... */ /* FIXME: validate correctness of last SVD entry offset. */ /* Structure of an on-disk directory record. */ /* Note: ISO9660 stores each multi-byte integer twice, once in * each byte order. The sizes here are the size of just one * of the two integers. (This is why the offset of a field isn't * the same as the offset+size of the previous field.) */ #define DR_length_offset 0 #define DR_length_size 1 #define DR_ext_attr_length_offset 1 #define DR_ext_attr_length_size 1 #define DR_extent_offset 2 #define DR_extent_size 4 #define DR_size_offset 10 #define DR_size_size 4 #define DR_date_offset 18 #define DR_date_size 7 #define DR_flags_offset 25 #define DR_flags_size 1 #define DR_file_unit_size_offset 26 #define DR_file_unit_size_size 1 #define DR_interleave_offset 27 #define DR_interleave_size 1 #define DR_volume_sequence_number_offset 28 #define DR_volume_sequence_number_size 2 #define DR_name_len_offset 32 #define DR_name_len_size 1 #define DR_name_offset 33 #ifdef HAVE_ZLIB_H static const unsigned char zisofs_magic[8] = { 0x37, 0xE4, 0x53, 0x96, 0xC9, 0xDB, 0xD6, 0x07 }; struct zisofs { /* Set 1 if this file compressed by paged zlib */ int pz; int pz_log2_bs; /* Log2 of block size */ uint64_t pz_uncompressed_size; int initialized; unsigned char *uncompressed_buffer; size_t uncompressed_buffer_size; uint32_t pz_offset; unsigned char header[16]; size_t header_avail; int header_passed; unsigned char *block_pointers; size_t block_pointers_alloc; size_t block_pointers_size; size_t block_pointers_avail; size_t block_off; uint32_t block_avail; z_stream stream; int stream_valid; }; #else struct zisofs { /* Set 1 if this file compressed by paged zlib */ int pz; }; #endif struct content { uint64_t offset;/* Offset on disk. */ uint64_t size; /* File size in bytes. */ struct content *next; }; /* In-memory storage for a directory record. */ struct file_info { struct file_info *use_next; struct file_info *parent; struct file_info *next; struct file_info *re_next; int subdirs; uint64_t key; /* Heap Key. */ uint64_t offset; /* Offset on disk. */ uint64_t size; /* File size in bytes. */ uint32_t ce_offset; /* Offset of CE. */ uint32_t ce_size; /* Size of CE. */ char rr_moved; /* Flag to rr_moved. */ char rr_moved_has_re_only; char re; /* Having RRIP "RE" extension. */ char re_descendant; uint64_t cl_offset; /* Having RRIP "CL" extension. */ int birthtime_is_set; time_t birthtime; /* File created time. */ time_t mtime; /* File last modified time. */ time_t atime; /* File last accessed time. */ time_t ctime; /* File attribute change time. */ uint64_t rdev; /* Device number. */ mode_t mode; uid_t uid; gid_t gid; int64_t number; int nlinks; struct archive_string name; /* Pathname */ unsigned char *utf16be_name; size_t utf16be_bytes; char name_continues; /* Non-zero if name continues */ struct archive_string symlink; char symlink_continues; /* Non-zero if link continues */ /* Set 1 if this file compressed by paged zlib(zisofs) */ int pz; int pz_log2_bs; /* Log2 of block size */ uint64_t pz_uncompressed_size; /* Set 1 if this file is multi extent. */ int multi_extent; struct { struct content *first; struct content **last; } contents; struct { struct file_info *first; struct file_info **last; } rede_files; }; struct heap_queue { struct file_info **files; int allocated; int used; }; struct iso9660 { int magic; #define ISO9660_MAGIC 0x96609660 int opt_support_joliet; int opt_support_rockridge; struct archive_string pathname; char seenRockridge; /* Set true if RR extensions are used. */ char seenSUSP; /* Set true if SUSP is being used. */ char seenJoliet; unsigned char suspOffset; struct file_info *rr_moved; struct read_ce_queue { struct read_ce_req { uint64_t offset;/* Offset of CE on disk. */ struct file_info *file; } *reqs; int cnt; int allocated; } read_ce_req; int64_t previous_number; struct archive_string previous_pathname; struct file_info *use_files; struct heap_queue pending_files; struct { struct file_info *first; struct file_info **last; } cache_files; struct { struct file_info *first; struct file_info **last; } re_files; uint64_t current_position; ssize_t logical_block_size; uint64_t volume_size; /* Total size of volume in bytes. */ int32_t volume_block;/* Total size of volume in logical blocks. */ struct vd { int location; /* Location of Extent. */ uint32_t size; } primary, joliet; int64_t entry_sparse_offset; int64_t entry_bytes_remaining; size_t entry_bytes_unconsumed; struct zisofs entry_zisofs; struct content *entry_content; struct archive_string_conv *sconv_utf16be; /* * Buffers for a full pathname in UTF-16BE in Joliet extensions. */ #define UTF16_NAME_MAX 1024 unsigned char *utf16be_path; size_t utf16be_path_len; unsigned char *utf16be_previous_path; size_t utf16be_previous_path_len; /* Null buffer used in bidder to improve its performance. */ unsigned char null[2048]; }; static int archive_read_format_iso9660_bid(struct archive_read *, int); static int archive_read_format_iso9660_options(struct archive_read *, const char *, const char *); static int archive_read_format_iso9660_cleanup(struct archive_read *); static int archive_read_format_iso9660_read_data(struct archive_read *, const void **, size_t *, int64_t *); static int archive_read_format_iso9660_read_data_skip(struct archive_read *); static int archive_read_format_iso9660_read_header(struct archive_read *, struct archive_entry *); static const char *build_pathname(struct archive_string *, struct file_info *, int); static int build_pathname_utf16be(unsigned char *, size_t, size_t *, struct file_info *); #if DEBUG static void dump_isodirrec(FILE *, const unsigned char *isodirrec); #endif static time_t time_from_tm(struct tm *); static time_t isodate17(const unsigned char *); static time_t isodate7(const unsigned char *); static int isBootRecord(struct iso9660 *, const unsigned char *); static int isVolumePartition(struct iso9660 *, const unsigned char *); static int isVDSetTerminator(struct iso9660 *, const unsigned char *); static int isJolietSVD(struct iso9660 *, const unsigned char *); static int isSVD(struct iso9660 *, const unsigned char *); static int isEVD(struct iso9660 *, const unsigned char *); static int isPVD(struct iso9660 *, const unsigned char *); static int next_cache_entry(struct archive_read *, struct iso9660 *, struct file_info **); static int next_entry_seek(struct archive_read *, struct iso9660 *, struct file_info **); static struct file_info * parse_file_info(struct archive_read *a, struct file_info *parent, const unsigned char *isodirrec, size_t reclen); static int parse_rockridge(struct archive_read *a, struct file_info *file, const unsigned char *start, const unsigned char *end); static int register_CE(struct archive_read *a, int32_t location, struct file_info *file); static int read_CE(struct archive_read *a, struct iso9660 *iso9660); static void parse_rockridge_NM1(struct file_info *, const unsigned char *, int); static void parse_rockridge_SL1(struct file_info *, const unsigned char *, int); static void parse_rockridge_TF1(struct file_info *, const unsigned char *, int); static void parse_rockridge_ZF1(struct file_info *, const unsigned char *, int); static void register_file(struct iso9660 *, struct file_info *); static void release_files(struct iso9660 *); static unsigned toi(const void *p, int n); static inline void re_add_entry(struct iso9660 *, struct file_info *); static inline struct file_info * re_get_entry(struct iso9660 *); static inline int rede_add_entry(struct file_info *); static inline struct file_info * rede_get_entry(struct file_info *); static inline void cache_add_entry(struct iso9660 *iso9660, struct file_info *file); static inline struct file_info *cache_get_entry(struct iso9660 *iso9660); static int heap_add_entry(struct archive_read *a, struct heap_queue *heap, struct file_info *file, uint64_t key); static struct file_info *heap_get_entry(struct heap_queue *heap); #define add_entry(arch, iso9660, file) \ heap_add_entry(arch, &((iso9660)->pending_files), file, file->offset) #define next_entry(iso9660) \ heap_get_entry(&((iso9660)->pending_files)) int archive_read_support_format_iso9660(struct archive *_a) { struct archive_read *a = (struct archive_read *)_a; struct iso9660 *iso9660; int r; archive_check_magic(_a, ARCHIVE_READ_MAGIC, ARCHIVE_STATE_NEW, "archive_read_support_format_iso9660"); iso9660 = (struct iso9660 *)calloc(1, sizeof(*iso9660)); if (iso9660 == NULL) { archive_set_error(&a->archive, ENOMEM, "Can't allocate iso9660 data"); return (ARCHIVE_FATAL); } iso9660->magic = ISO9660_MAGIC; iso9660->cache_files.first = NULL; iso9660->cache_files.last = &(iso9660->cache_files.first); iso9660->re_files.first = NULL; iso9660->re_files.last = &(iso9660->re_files.first); /* Enable to support Joliet extensions by default. */ iso9660->opt_support_joliet = 1; /* Enable to support Rock Ridge extensions by default. */ iso9660->opt_support_rockridge = 1; r = __archive_read_register_format(a, iso9660, "iso9660", archive_read_format_iso9660_bid, archive_read_format_iso9660_options, archive_read_format_iso9660_read_header, archive_read_format_iso9660_read_data, archive_read_format_iso9660_read_data_skip, NULL, archive_read_format_iso9660_cleanup, NULL, NULL); if (r != ARCHIVE_OK) { free(iso9660); return (r); } return (ARCHIVE_OK); } static int archive_read_format_iso9660_bid(struct archive_read *a, int best_bid) { struct iso9660 *iso9660; ssize_t bytes_read; const unsigned char *p; int seenTerminator; /* If there's already a better bid than we can ever make, don't bother testing. */ if (best_bid > 48) return (-1); iso9660 = (struct iso9660 *)(a->format->data); /* * Skip the first 32k (reserved area) and get the first * 8 sectors of the volume descriptor table. Of course, * if the I/O layer gives us more, we'll take it. */ #define RESERVED_AREA (SYSTEM_AREA_BLOCK * LOGICAL_BLOCK_SIZE) p = __archive_read_ahead(a, RESERVED_AREA + 8 * LOGICAL_BLOCK_SIZE, &bytes_read); if (p == NULL) return (-1); /* Skip the reserved area. */ bytes_read -= RESERVED_AREA; p += RESERVED_AREA; /* Check each volume descriptor. */ seenTerminator = 0; for (; bytes_read > LOGICAL_BLOCK_SIZE; bytes_read -= LOGICAL_BLOCK_SIZE, p += LOGICAL_BLOCK_SIZE) { /* Do not handle undefined Volume Descriptor Type. */ if (p[0] >= 4 && p[0] <= 254) return (0); /* Standard Identifier must be "CD001" */ if (memcmp(p + 1, "CD001", 5) != 0) return (0); if (isPVD(iso9660, p)) continue; if (!iso9660->joliet.location) { if (isJolietSVD(iso9660, p)) continue; } if (isBootRecord(iso9660, p)) continue; if (isEVD(iso9660, p)) continue; if (isSVD(iso9660, p)) continue; if (isVolumePartition(iso9660, p)) continue; if (isVDSetTerminator(iso9660, p)) { seenTerminator = 1; break; } return (0); } /* * ISO 9660 format must have Primary Volume Descriptor and * Volume Descriptor Set Terminator. */ if (seenTerminator && iso9660->primary.location > 16) return (48); /* We didn't find a valid PVD; return a bid of zero. */ return (0); } static int archive_read_format_iso9660_options(struct archive_read *a, const char *key, const char *val) { struct iso9660 *iso9660; iso9660 = (struct iso9660 *)(a->format->data); if (strcmp(key, "joliet") == 0) { if (val == NULL || strcmp(val, "off") == 0 || strcmp(val, "ignore") == 0 || strcmp(val, "disable") == 0 || strcmp(val, "0") == 0) iso9660->opt_support_joliet = 0; else iso9660->opt_support_joliet = 1; return (ARCHIVE_OK); } if (strcmp(key, "rockridge") == 0 || strcmp(key, "Rockridge") == 0) { iso9660->opt_support_rockridge = val != NULL; return (ARCHIVE_OK); } /* 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 isNull(struct iso9660 *iso9660, const unsigned char *h, unsigned offset, unsigned bytes) { while (bytes >= sizeof(iso9660->null)) { if (!memcmp(iso9660->null, h + offset, sizeof(iso9660->null))) return (0); offset += sizeof(iso9660->null); bytes -= sizeof(iso9660->null); } if (bytes) return memcmp(iso9660->null, h + offset, bytes) == 0; else return (1); } static int isBootRecord(struct iso9660 *iso9660, const unsigned char *h) { (void)iso9660; /* UNUSED */ /* Type of the Volume Descriptor Boot Record must be 0. */ if (h[0] != 0) return (0); /* Volume Descriptor Version must be 1. */ if (h[6] != 1) return (0); return (1); } static int isVolumePartition(struct iso9660 *iso9660, const unsigned char *h) { int32_t location; /* Type of the Volume Partition Descriptor must be 3. */ if (h[0] != 3) return (0); /* Volume Descriptor Version must be 1. */ if (h[6] != 1) return (0); /* Unused Field */ if (h[7] != 0) return (0); location = archive_le32dec(h + 72); if (location <= SYSTEM_AREA_BLOCK || location >= iso9660->volume_block) return (0); if ((uint32_t)location != archive_be32dec(h + 76)) return (0); return (1); } static int isVDSetTerminator(struct iso9660 *iso9660, const unsigned char *h) { (void)iso9660; /* UNUSED */ /* Type of the Volume Descriptor Set Terminator must be 255. */ if (h[0] != 255) return (0); /* Volume Descriptor Version must be 1. */ if (h[6] != 1) return (0); /* Reserved field must be 0. */ if (!isNull(iso9660, h, 7, 2048-7)) return (0); return (1); } static int isJolietSVD(struct iso9660 *iso9660, const unsigned char *h) { const unsigned char *p; ssize_t logical_block_size; int32_t volume_block; /* Check if current sector is a kind of Supplementary Volume * Descriptor. */ if (!isSVD(iso9660, h)) return (0); /* FIXME: do more validations according to joliet spec. */ /* check if this SVD contains joliet extension! */ p = h + SVD_escape_sequences_offset; /* N.B. Joliet spec says p[1] == '\\', but.... */ if (p[0] == '%' && p[1] == '/') { int level = 0; if (p[2] == '@') level = 1; else if (p[2] == 'C') level = 2; else if (p[2] == 'E') level = 3; else /* not joliet */ return (0); iso9660->seenJoliet = level; } else /* not joliet */ return (0); logical_block_size = archive_le16dec(h + SVD_logical_block_size_offset); volume_block = archive_le32dec(h + SVD_volume_space_size_offset); iso9660->logical_block_size = logical_block_size; iso9660->volume_block = volume_block; iso9660->volume_size = logical_block_size * (uint64_t)volume_block; /* Read Root Directory Record in Volume Descriptor. */ p = h + SVD_root_directory_record_offset; iso9660->joliet.location = archive_le32dec(p + DR_extent_offset); iso9660->joliet.size = archive_le32dec(p + DR_size_offset); return (48); } static int isSVD(struct iso9660 *iso9660, const unsigned char *h) { const unsigned char *p; ssize_t logical_block_size; int32_t volume_block; int32_t location; (void)iso9660; /* UNUSED */ /* Type 2 means it's a SVD. */ if (h[SVD_type_offset] != 2) return (0); /* Reserved field must be 0. */ if (!isNull(iso9660, h, SVD_reserved1_offset, SVD_reserved1_size)) return (0); if (!isNull(iso9660, h, SVD_reserved2_offset, SVD_reserved2_size)) return (0); if (!isNull(iso9660, h, SVD_reserved3_offset, SVD_reserved3_size)) return (0); /* File structure version must be 1 for ISO9660/ECMA119. */ if (h[SVD_file_structure_version_offset] != 1) return (0); logical_block_size = archive_le16dec(h + SVD_logical_block_size_offset); if (logical_block_size <= 0) return (0); volume_block = archive_le32dec(h + SVD_volume_space_size_offset); if (volume_block <= SYSTEM_AREA_BLOCK+4) return (0); /* Location of Occurrence of Type L Path Table must be * available location, * >= SYSTEM_AREA_BLOCK(16) + 2 and < Volume Space Size. */ location = archive_le32dec(h+SVD_type_L_path_table_offset); if (location < SYSTEM_AREA_BLOCK+2 || location >= volume_block) return (0); /* The Type M Path Table must be at a valid location (WinISO * and probably other programs omit this, so we allow zero) * * >= SYSTEM_AREA_BLOCK(16) + 2 and < Volume Space Size. */ location = archive_be32dec(h+SVD_type_M_path_table_offset); if ((location > 0 && location < SYSTEM_AREA_BLOCK+2) || location >= volume_block) return (0); /* Read Root Directory Record in Volume Descriptor. */ p = h + SVD_root_directory_record_offset; if (p[DR_length_offset] != 34) return (0); return (48); } static int isEVD(struct iso9660 *iso9660, const unsigned char *h) { const unsigned char *p; ssize_t logical_block_size; int32_t volume_block; int32_t location; (void)iso9660; /* UNUSED */ /* Type of the Enhanced Volume Descriptor must be 2. */ if (h[PVD_type_offset] != 2) return (0); /* EVD version must be 2. */ if (h[PVD_version_offset] != 2) return (0); /* Reserved field must be 0. */ if (h[PVD_reserved1_offset] != 0) return (0); /* Reserved field must be 0. */ if (!isNull(iso9660, h, PVD_reserved2_offset, PVD_reserved2_size)) return (0); /* Reserved field must be 0. */ if (!isNull(iso9660, h, PVD_reserved3_offset, PVD_reserved3_size)) return (0); /* Logical block size must be > 0. */ /* I've looked at Ecma 119 and can't find any stronger * restriction on this field. */ logical_block_size = archive_le16dec(h + PVD_logical_block_size_offset); if (logical_block_size <= 0) return (0); volume_block = archive_le32dec(h + PVD_volume_space_size_offset); if (volume_block <= SYSTEM_AREA_BLOCK+4) return (0); /* File structure version must be 2 for ISO9660:1999. */ if (h[PVD_file_structure_version_offset] != 2) return (0); /* Location of Occurrence of Type L Path Table must be * available location, * >= SYSTEM_AREA_BLOCK(16) + 2 and < Volume Space Size. */ location = archive_le32dec(h+PVD_type_1_path_table_offset); if (location < SYSTEM_AREA_BLOCK+2 || location >= volume_block) return (0); /* Location of Occurrence of Type M Path Table must be * available location, * >= SYSTEM_AREA_BLOCK(16) + 2 and < Volume Space Size. */ location = archive_be32dec(h+PVD_type_m_path_table_offset); if ((location > 0 && location < SYSTEM_AREA_BLOCK+2) || location >= volume_block) return (0); /* Reserved field must be 0. */ if (!isNull(iso9660, h, PVD_reserved4_offset, PVD_reserved4_size)) return (0); /* Reserved field must be 0. */ if (!isNull(iso9660, h, PVD_reserved5_offset, PVD_reserved5_size)) return (0); /* Read Root Directory Record in Volume Descriptor. */ p = h + PVD_root_directory_record_offset; if (p[DR_length_offset] != 34) return (0); return (48); } static int isPVD(struct iso9660 *iso9660, const unsigned char *h) { const unsigned char *p; ssize_t logical_block_size; int32_t volume_block; int32_t location; int i; /* Type of the Primary Volume Descriptor must be 1. */ if (h[PVD_type_offset] != 1) return (0); /* PVD version must be 1. */ if (h[PVD_version_offset] != 1) return (0); /* Reserved field must be 0. */ if (h[PVD_reserved1_offset] != 0) return (0); /* Reserved field must be 0. */ if (!isNull(iso9660, h, PVD_reserved2_offset, PVD_reserved2_size)) return (0); /* Reserved field must be 0. */ if (!isNull(iso9660, h, PVD_reserved3_offset, PVD_reserved3_size)) return (0); /* Logical block size must be > 0. */ /* I've looked at Ecma 119 and can't find any stronger * restriction on this field. */ logical_block_size = archive_le16dec(h + PVD_logical_block_size_offset); if (logical_block_size <= 0) return (0); volume_block = archive_le32dec(h + PVD_volume_space_size_offset); if (volume_block <= SYSTEM_AREA_BLOCK+4) return (0); /* File structure version must be 1 for ISO9660/ECMA119. */ if (h[PVD_file_structure_version_offset] != 1) return (0); /* Location of Occurrence of Type L Path Table must be * available location, * > SYSTEM_AREA_BLOCK(16) + 2 and < Volume Space Size. */ location = archive_le32dec(h+PVD_type_1_path_table_offset); if (location < SYSTEM_AREA_BLOCK+2 || location >= volume_block) return (0); /* The Type M Path Table must also be at a valid location * (although ECMA 119 requires a Type M Path Table, WinISO and * probably other programs omit it, so we permit a zero here) * * >= SYSTEM_AREA_BLOCK(16) + 2 and < Volume Space Size. */ location = archive_be32dec(h+PVD_type_m_path_table_offset); if ((location > 0 && location < SYSTEM_AREA_BLOCK+2) || location >= volume_block) return (0); /* Reserved field must be 0. */ /* But accept NetBSD/FreeBSD "makefs" images with 0x20 here. */ for (i = 0; i < PVD_reserved4_size; ++i) if (h[PVD_reserved4_offset + i] != 0 && h[PVD_reserved4_offset + i] != 0x20) return (0); /* Reserved field must be 0. */ if (!isNull(iso9660, h, PVD_reserved5_offset, PVD_reserved5_size)) return (0); /* XXX TODO: Check other values for sanity; reject more * malformed PVDs. XXX */ /* Read Root Directory Record in Volume Descriptor. */ p = h + PVD_root_directory_record_offset; if (p[DR_length_offset] != 34) return (0); if (!iso9660->primary.location) { iso9660->logical_block_size = logical_block_size; iso9660->volume_block = volume_block; iso9660->volume_size = logical_block_size * (uint64_t)volume_block; iso9660->primary.location = archive_le32dec(p + DR_extent_offset); iso9660->primary.size = archive_le32dec(p + DR_size_offset); } return (48); } static int read_children(struct archive_read *a, struct file_info *parent) { struct iso9660 *iso9660; const unsigned char *b, *p; struct file_info *multi; size_t step, skip_size; iso9660 = (struct iso9660 *)(a->format->data); /* flush any remaining bytes from the last round to ensure * we're positioned */ if (iso9660->entry_bytes_unconsumed) { __archive_read_consume(a, iso9660->entry_bytes_unconsumed); iso9660->entry_bytes_unconsumed = 0; } if (iso9660->current_position > parent->offset) { archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC, "Ignoring out-of-order directory (%s) %jd > %jd", parent->name.s, (intmax_t)iso9660->current_position, (intmax_t)parent->offset); return (ARCHIVE_WARN); } if (parent->offset + parent->size > iso9660->volume_size) { archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC, "Directory is beyond end-of-media: %s", parent->name.s); return (ARCHIVE_WARN); } if (iso9660->current_position < parent->offset) { int64_t skipsize; skipsize = parent->offset - iso9660->current_position; skipsize = __archive_read_consume(a, skipsize); if (skipsize < 0) return ((int)skipsize); iso9660->current_position = parent->offset; } step = (size_t)(((parent->size + iso9660->logical_block_size -1) / iso9660->logical_block_size) * iso9660->logical_block_size); b = __archive_read_ahead(a, step, NULL); if (b == NULL) { archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC, "Failed to read full block when scanning " "ISO9660 directory list"); return (ARCHIVE_FATAL); } iso9660->current_position += step; multi = NULL; skip_size = step; while (step) { p = b; b += iso9660->logical_block_size; step -= iso9660->logical_block_size; for (; *p != 0 && p + DR_name_offset < b && p + *p <= b; p += *p) { struct file_info *child; /* N.B.: these special directory identifiers * are 8 bit "values" even on a * Joliet CD with UCS-2 (16bit) encoding. */ /* Skip '.' entry. */ if (*(p + DR_name_len_offset) == 1 && *(p + DR_name_offset) == '\0') continue; /* Skip '..' entry. */ if (*(p + DR_name_len_offset) == 1 && *(p + DR_name_offset) == '\001') continue; child = parse_file_info(a, parent, p, b - p); if (child == NULL) { __archive_read_consume(a, skip_size); return (ARCHIVE_FATAL); } if (child->cl_offset == 0 && (child->multi_extent || multi != NULL)) { struct content *con; if (multi == NULL) { multi = child; multi->contents.first = NULL; multi->contents.last = &(multi->contents.first); } con = malloc(sizeof(struct content)); if (con == NULL) { archive_set_error( &a->archive, ENOMEM, "No memory for multi extent"); __archive_read_consume(a, skip_size); return (ARCHIVE_FATAL); } con->offset = child->offset; con->size = child->size; con->next = NULL; *multi->contents.last = con; multi->contents.last = &(con->next); if (multi == child) { if (add_entry(a, iso9660, child) != ARCHIVE_OK) return (ARCHIVE_FATAL); } else { multi->size += child->size; if (!child->multi_extent) multi = NULL; } } else if (add_entry(a, iso9660, child) != ARCHIVE_OK) return (ARCHIVE_FATAL); } } __archive_read_consume(a, skip_size); /* Read data which recorded by RRIP "CE" extension. */ if (read_CE(a, iso9660) != ARCHIVE_OK) return (ARCHIVE_FATAL); return (ARCHIVE_OK); } static int choose_volume(struct archive_read *a, struct iso9660 *iso9660) { struct file_info *file; int64_t skipsize; struct vd *vd; const void *block; char seenJoliet; vd = &(iso9660->primary); if (!iso9660->opt_support_joliet) iso9660->seenJoliet = 0; if (iso9660->seenJoliet && vd->location > iso9660->joliet.location) /* This condition is unlikely; by way of caution. */ vd = &(iso9660->joliet); skipsize = LOGICAL_BLOCK_SIZE * (int64_t)vd->location; skipsize = __archive_read_consume(a, skipsize); if (skipsize < 0) return ((int)skipsize); iso9660->current_position = skipsize; block = __archive_read_ahead(a, vd->size, NULL); if (block == NULL) { archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC, "Failed to read full block when scanning " "ISO9660 directory list"); return (ARCHIVE_FATAL); } /* * While reading Root Directory, flag seenJoliet must be zero to * avoid converting special name 0x00(Current Directory) and * next byte to UCS2. */ seenJoliet = iso9660->seenJoliet;/* Save flag. */ iso9660->seenJoliet = 0; file = parse_file_info(a, NULL, block, vd->size); if (file == NULL) return (ARCHIVE_FATAL); iso9660->seenJoliet = seenJoliet; /* * If the iso image has both RockRidge and Joliet, we preferentially * use RockRidge Extensions rather than Joliet ones. */ if (vd == &(iso9660->primary) && iso9660->seenRockridge && iso9660->seenJoliet) iso9660->seenJoliet = 0; if (vd == &(iso9660->primary) && !iso9660->seenRockridge && iso9660->seenJoliet) { /* Switch reading data from primary to joliet. */ vd = &(iso9660->joliet); skipsize = LOGICAL_BLOCK_SIZE * (int64_t)vd->location; skipsize -= iso9660->current_position; skipsize = __archive_read_consume(a, skipsize); if (skipsize < 0) return ((int)skipsize); iso9660->current_position += skipsize; block = __archive_read_ahead(a, vd->size, NULL); if (block == NULL) { archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC, "Failed to read full block when scanning " "ISO9660 directory list"); return (ARCHIVE_FATAL); } iso9660->seenJoliet = 0; file = parse_file_info(a, NULL, block, vd->size); if (file == NULL) return (ARCHIVE_FATAL); iso9660->seenJoliet = seenJoliet; } /* Store the root directory in the pending list. */ if (add_entry(a, iso9660, file) != ARCHIVE_OK) return (ARCHIVE_FATAL); if (iso9660->seenRockridge) { a->archive.archive_format = ARCHIVE_FORMAT_ISO9660_ROCKRIDGE; a->archive.archive_format_name = "ISO9660 with Rockridge extensions"; } return (ARCHIVE_OK); } static int archive_read_format_iso9660_read_header(struct archive_read *a, struct archive_entry *entry) { struct iso9660 *iso9660; struct file_info *file; int r, rd_r = ARCHIVE_OK; iso9660 = (struct iso9660 *)(a->format->data); if (!a->archive.archive_format) { a->archive.archive_format = ARCHIVE_FORMAT_ISO9660; a->archive.archive_format_name = "ISO9660"; } if (iso9660->current_position == 0) { r = choose_volume(a, iso9660); if (r != ARCHIVE_OK) return (r); } file = NULL;/* Eliminate a warning. */ /* Get the next entry that appears after the current offset. */ r = next_entry_seek(a, iso9660, &file); if (r != ARCHIVE_OK) return (r); if (iso9660->seenJoliet) { /* * Convert UTF-16BE of a filename to local locale MBS * and store the result into a filename field. */ if (iso9660->sconv_utf16be == NULL) { iso9660->sconv_utf16be = archive_string_conversion_from_charset( &(a->archive), "UTF-16BE", 1); if (iso9660->sconv_utf16be == NULL) /* Couldn't allocate memory */ return (ARCHIVE_FATAL); } if (iso9660->utf16be_path == NULL) { iso9660->utf16be_path = malloc(UTF16_NAME_MAX); if (iso9660->utf16be_path == NULL) { archive_set_error(&a->archive, ENOMEM, "No memory"); return (ARCHIVE_FATAL); } } if (iso9660->utf16be_previous_path == NULL) { iso9660->utf16be_previous_path = malloc(UTF16_NAME_MAX); if (iso9660->utf16be_previous_path == NULL) { archive_set_error(&a->archive, ENOMEM, "No memory"); return (ARCHIVE_FATAL); } } iso9660->utf16be_path_len = 0; if (build_pathname_utf16be(iso9660->utf16be_path, UTF16_NAME_MAX, &(iso9660->utf16be_path_len), file) != 0) { archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT, "Pathname is too long"); return (ARCHIVE_FATAL); } r = archive_entry_copy_pathname_l(entry, (const char *)iso9660->utf16be_path, iso9660->utf16be_path_len, iso9660->sconv_utf16be); if (r != 0) { if (errno == ENOMEM) { archive_set_error(&a->archive, ENOMEM, "No memory for Pathname"); return (ARCHIVE_FATAL); } archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT, "Pathname cannot be converted " "from %s to current locale.", archive_string_conversion_charset_name( iso9660->sconv_utf16be)); rd_r = ARCHIVE_WARN; } } else { const char *path = build_pathname(&iso9660->pathname, file, 0); if (path == NULL) { archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT, "Pathname is too long"); return (ARCHIVE_FATAL); } else { archive_string_empty(&iso9660->pathname); archive_entry_set_pathname(entry, path); } } iso9660->entry_bytes_remaining = file->size; /* Offset for sparse-file-aware clients. */ iso9660->entry_sparse_offset = 0; if (file->offset + file->size > iso9660->volume_size) { archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC, "File is beyond end-of-media: %s", archive_entry_pathname(entry)); iso9660->entry_bytes_remaining = 0; return (ARCHIVE_WARN); } /* Set up the entry structure with information about this entry. */ archive_entry_set_mode(entry, file->mode); archive_entry_set_uid(entry, file->uid); archive_entry_set_gid(entry, file->gid); archive_entry_set_nlink(entry, file->nlinks); if (file->birthtime_is_set) archive_entry_set_birthtime(entry, file->birthtime, 0); else archive_entry_unset_birthtime(entry); archive_entry_set_mtime(entry, file->mtime, 0); archive_entry_set_ctime(entry, file->ctime, 0); archive_entry_set_atime(entry, file->atime, 0); /* N.B.: Rock Ridge supports 64-bit device numbers. */ archive_entry_set_rdev(entry, (dev_t)file->rdev); archive_entry_set_size(entry, iso9660->entry_bytes_remaining); if (file->symlink.s != NULL) archive_entry_copy_symlink(entry, file->symlink.s); /* Note: If the input isn't seekable, we can't rewind to * return the same body again, so if the next entry refers to * the same data, we have to return it as a hardlink to the * original entry. */ if (file->number != -1 && file->number == iso9660->previous_number) { if (iso9660->seenJoliet) { r = archive_entry_copy_hardlink_l(entry, (const char *)iso9660->utf16be_previous_path, iso9660->utf16be_previous_path_len, iso9660->sconv_utf16be); if (r != 0) { if (errno == ENOMEM) { archive_set_error(&a->archive, ENOMEM, "No memory for Linkname"); return (ARCHIVE_FATAL); } archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT, "Linkname cannot be converted " "from %s to current locale.", archive_string_conversion_charset_name( iso9660->sconv_utf16be)); rd_r = ARCHIVE_WARN; } } else archive_entry_set_hardlink(entry, iso9660->previous_pathname.s); archive_entry_unset_size(entry); iso9660->entry_bytes_remaining = 0; return (rd_r); } if ((file->mode & AE_IFMT) != AE_IFDIR && file->offset < iso9660->current_position) { int64_t r64; r64 = __archive_read_seek(a, file->offset, SEEK_SET); if (r64 != (int64_t)file->offset) { /* We can't seek backwards to extract it, so issue * a warning. Note that this can only happen if * this entry was added to the heap after we passed * this offset, that is, only if the directory * mentioning this entry is later than the body of * the entry. Such layouts are very unusual; most * ISO9660 writers lay out and record all directory * information first, then store all file bodies. */ archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC, "Ignoring out-of-order file @%jx (%s) %jd < %jd", (intmax_t)file->number, iso9660->pathname.s, (intmax_t)file->offset, (intmax_t)iso9660->current_position); iso9660->entry_bytes_remaining = 0; return (ARCHIVE_WARN); } iso9660->current_position = (uint64_t)r64; } /* Initialize zisofs variables. */ iso9660->entry_zisofs.pz = file->pz; if (file->pz) { #ifdef HAVE_ZLIB_H struct zisofs *zisofs; zisofs = &iso9660->entry_zisofs; zisofs->initialized = 0; zisofs->pz_log2_bs = file->pz_log2_bs; zisofs->pz_uncompressed_size = file->pz_uncompressed_size; zisofs->pz_offset = 0; zisofs->header_avail = 0; zisofs->header_passed = 0; zisofs->block_pointers_avail = 0; #endif archive_entry_set_size(entry, file->pz_uncompressed_size); } iso9660->previous_number = file->number; if (iso9660->seenJoliet) { memcpy(iso9660->utf16be_previous_path, iso9660->utf16be_path, iso9660->utf16be_path_len); iso9660->utf16be_previous_path_len = iso9660->utf16be_path_len; } else archive_strcpy( &iso9660->previous_pathname, iso9660->pathname.s); /* Reset entry_bytes_remaining if the file is multi extent. */ iso9660->entry_content = file->contents.first; if (iso9660->entry_content != NULL) iso9660->entry_bytes_remaining = iso9660->entry_content->size; if (archive_entry_filetype(entry) == AE_IFDIR) { /* Overwrite nlinks by proper link number which is * calculated from number of sub directories. */ archive_entry_set_nlink(entry, 2 + file->subdirs); /* Directory data has been read completely. */ iso9660->entry_bytes_remaining = 0; } if (rd_r != ARCHIVE_OK) return (rd_r); return (ARCHIVE_OK); } static int archive_read_format_iso9660_read_data_skip(struct archive_read *a) { /* Because read_next_header always does an explicit skip * to the next entry, we don't need to do anything here. */ (void)a; /* UNUSED */ return (ARCHIVE_OK); } #ifdef HAVE_ZLIB_H static int zisofs_read_data(struct archive_read *a, const void **buff, size_t *size, int64_t *offset) { struct iso9660 *iso9660; struct zisofs *zisofs; const unsigned char *p; size_t avail; ssize_t bytes_read; size_t uncompressed_size; int r; iso9660 = (struct iso9660 *)(a->format->data); zisofs = &iso9660->entry_zisofs; p = __archive_read_ahead(a, 1, &bytes_read); if (bytes_read <= 0) { archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT, "Truncated zisofs file body"); return (ARCHIVE_FATAL); } if (bytes_read > iso9660->entry_bytes_remaining) bytes_read = (ssize_t)iso9660->entry_bytes_remaining; avail = bytes_read; uncompressed_size = 0; if (!zisofs->initialized) { size_t ceil, xsize; /* Allocate block pointers buffer. */ ceil = (size_t)((zisofs->pz_uncompressed_size + (((int64_t)1) << zisofs->pz_log2_bs) - 1) >> zisofs->pz_log2_bs); xsize = (ceil + 1) * 4; if (zisofs->block_pointers_alloc < xsize) { size_t alloc; if (zisofs->block_pointers != NULL) free(zisofs->block_pointers); alloc = ((xsize >> 10) + 1) << 10; zisofs->block_pointers = malloc(alloc); if (zisofs->block_pointers == NULL) { archive_set_error(&a->archive, ENOMEM, "No memory for zisofs decompression"); return (ARCHIVE_FATAL); } zisofs->block_pointers_alloc = alloc; } zisofs->block_pointers_size = xsize; /* Allocate uncompressed data buffer. */ xsize = (size_t)1UL << zisofs->pz_log2_bs; if (zisofs->uncompressed_buffer_size < xsize) { if (zisofs->uncompressed_buffer != NULL) free(zisofs->uncompressed_buffer); zisofs->uncompressed_buffer = malloc(xsize); if (zisofs->uncompressed_buffer == NULL) { archive_set_error(&a->archive, ENOMEM, "No memory for zisofs decompression"); return (ARCHIVE_FATAL); } } zisofs->uncompressed_buffer_size = xsize; /* * Read the file header, and check the magic code of zisofs. */ if (zisofs->header_avail < sizeof(zisofs->header)) { xsize = sizeof(zisofs->header) - zisofs->header_avail; if (avail < xsize) xsize = avail; memcpy(zisofs->header + zisofs->header_avail, p, xsize); zisofs->header_avail += xsize; avail -= xsize; p += xsize; } if (!zisofs->header_passed && zisofs->header_avail == sizeof(zisofs->header)) { int err = 0; if (memcmp(zisofs->header, zisofs_magic, sizeof(zisofs_magic)) != 0) err = 1; if (archive_le32dec(zisofs->header + 8) != zisofs->pz_uncompressed_size) err = 1; if (zisofs->header[12] != 4) err = 1; if (zisofs->header[13] != zisofs->pz_log2_bs) err = 1; if (err) { archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT, "Illegal zisofs file body"); return (ARCHIVE_FATAL); } zisofs->header_passed = 1; } /* * Read block pointers. */ if (zisofs->header_passed && zisofs->block_pointers_avail < zisofs->block_pointers_size) { xsize = zisofs->block_pointers_size - zisofs->block_pointers_avail; if (avail < xsize) xsize = avail; memcpy(zisofs->block_pointers + zisofs->block_pointers_avail, p, xsize); zisofs->block_pointers_avail += xsize; avail -= xsize; p += xsize; if (zisofs->block_pointers_avail == zisofs->block_pointers_size) { /* We've got all block pointers and initialize * related variables. */ zisofs->block_off = 0; zisofs->block_avail = 0; /* Complete a initialization */ zisofs->initialized = 1; } } if (!zisofs->initialized) goto next_data; /* We need more data. */ } /* * Get block offsets from block pointers. */ if (zisofs->block_avail == 0) { uint32_t bst, bed; if (zisofs->block_off + 4 >= zisofs->block_pointers_size) { /* There isn't a pair of offsets. */ archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT, "Illegal zisofs block pointers"); return (ARCHIVE_FATAL); } bst = archive_le32dec( zisofs->block_pointers + zisofs->block_off); if (bst != zisofs->pz_offset + (bytes_read - avail)) { /* TODO: Should we seek offset of current file * by bst ? */ archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT, "Illegal zisofs block pointers(cannot seek)"); return (ARCHIVE_FATAL); } bed = archive_le32dec( zisofs->block_pointers + zisofs->block_off + 4); if (bed < bst) { archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT, "Illegal zisofs block pointers"); return (ARCHIVE_FATAL); } zisofs->block_avail = bed - bst; zisofs->block_off += 4; /* Initialize compression library for new block. */ if (zisofs->stream_valid) r = inflateReset(&zisofs->stream); else r = inflateInit(&zisofs->stream); if (r != Z_OK) { archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC, "Can't initialize zisofs decompression."); return (ARCHIVE_FATAL); } zisofs->stream_valid = 1; zisofs->stream.total_in = 0; zisofs->stream.total_out = 0; } /* * Make uncompressed data. */ if (zisofs->block_avail == 0) { memset(zisofs->uncompressed_buffer, 0, zisofs->uncompressed_buffer_size); uncompressed_size = zisofs->uncompressed_buffer_size; } else { zisofs->stream.next_in = (Bytef *)(uintptr_t)(const void *)p; if (avail > zisofs->block_avail) zisofs->stream.avail_in = zisofs->block_avail; else zisofs->stream.avail_in = (uInt)avail; zisofs->stream.next_out = zisofs->uncompressed_buffer; zisofs->stream.avail_out = (uInt)zisofs->uncompressed_buffer_size; r = inflate(&zisofs->stream, 0); switch (r) { case Z_OK: /* Decompressor made some progress.*/ case Z_STREAM_END: /* Found end of stream. */ break; default: archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC, "zisofs decompression failed (%d)", r); return (ARCHIVE_FATAL); } uncompressed_size = zisofs->uncompressed_buffer_size - zisofs->stream.avail_out; avail -= zisofs->stream.next_in - p; zisofs->block_avail -= (uint32_t)(zisofs->stream.next_in - p); } next_data: bytes_read -= avail; *buff = zisofs->uncompressed_buffer; *size = uncompressed_size; *offset = iso9660->entry_sparse_offset; iso9660->entry_sparse_offset += uncompressed_size; iso9660->entry_bytes_remaining -= bytes_read; iso9660->current_position += bytes_read; zisofs->pz_offset += (uint32_t)bytes_read; iso9660->entry_bytes_unconsumed += bytes_read; return (ARCHIVE_OK); } #else /* HAVE_ZLIB_H */ static int zisofs_read_data(struct archive_read *a, const void **buff, size_t *size, int64_t *offset) { (void)buff;/* UNUSED */ (void)size;/* UNUSED */ (void)offset;/* UNUSED */ archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT, "zisofs is not supported on this platform."); return (ARCHIVE_FAILED); } #endif /* HAVE_ZLIB_H */ static int archive_read_format_iso9660_read_data(struct archive_read *a, const void **buff, size_t *size, int64_t *offset) { ssize_t bytes_read; struct iso9660 *iso9660; iso9660 = (struct iso9660 *)(a->format->data); if (iso9660->entry_bytes_unconsumed) { __archive_read_consume(a, iso9660->entry_bytes_unconsumed); iso9660->entry_bytes_unconsumed = 0; } if (iso9660->entry_bytes_remaining <= 0) { if (iso9660->entry_content != NULL) iso9660->entry_content = iso9660->entry_content->next; if (iso9660->entry_content == NULL) { *buff = NULL; *size = 0; *offset = iso9660->entry_sparse_offset; return (ARCHIVE_EOF); } /* Seek forward to the start of the entry. */ if (iso9660->current_position < iso9660->entry_content->offset) { int64_t step; step = iso9660->entry_content->offset - iso9660->current_position; step = __archive_read_consume(a, step); if (step < 0) return ((int)step); iso9660->current_position = iso9660->entry_content->offset; } if (iso9660->entry_content->offset < iso9660->current_position) { archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC, "Ignoring out-of-order file (%s) %jd < %jd", iso9660->pathname.s, (intmax_t)iso9660->entry_content->offset, (intmax_t)iso9660->current_position); *buff = NULL; *size = 0; *offset = iso9660->entry_sparse_offset; return (ARCHIVE_WARN); } iso9660->entry_bytes_remaining = iso9660->entry_content->size; } if (iso9660->entry_zisofs.pz) return (zisofs_read_data(a, buff, size, offset)); *buff = __archive_read_ahead(a, 1, &bytes_read); if (bytes_read == 0) archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC, "Truncated input file"); if (*buff == NULL) return (ARCHIVE_FATAL); if (bytes_read > iso9660->entry_bytes_remaining) bytes_read = (ssize_t)iso9660->entry_bytes_remaining; *size = bytes_read; *offset = iso9660->entry_sparse_offset; iso9660->entry_sparse_offset += bytes_read; iso9660->entry_bytes_remaining -= bytes_read; iso9660->entry_bytes_unconsumed = bytes_read; iso9660->current_position += bytes_read; return (ARCHIVE_OK); } static int archive_read_format_iso9660_cleanup(struct archive_read *a) { struct iso9660 *iso9660; int r = ARCHIVE_OK; iso9660 = (struct iso9660 *)(a->format->data); release_files(iso9660); free(iso9660->read_ce_req.reqs); archive_string_free(&iso9660->pathname); archive_string_free(&iso9660->previous_pathname); free(iso9660->pending_files.files); #ifdef HAVE_ZLIB_H free(iso9660->entry_zisofs.uncompressed_buffer); free(iso9660->entry_zisofs.block_pointers); if (iso9660->entry_zisofs.stream_valid) { if (inflateEnd(&iso9660->entry_zisofs.stream) != Z_OK) { archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC, "Failed to clean up zlib decompressor"); r = ARCHIVE_FATAL; } } #endif free(iso9660->utf16be_path); free(iso9660->utf16be_previous_path); free(iso9660); (a->format->data) = NULL; return (r); } /* * This routine parses a single ISO directory record, makes sense * of any extensions, and stores the result in memory. */ static struct file_info * parse_file_info(struct archive_read *a, struct file_info *parent, const unsigned char *isodirrec, size_t reclen) { struct iso9660 *iso9660; struct file_info *file, *filep; size_t name_len; const unsigned char *rr_start, *rr_end; const unsigned char *p; size_t dr_len = 0; uint64_t fsize, offset; int32_t location; int flags; iso9660 = (struct iso9660 *)(a->format->data); if (reclen != 0) dr_len = (size_t)isodirrec[DR_length_offset]; /* * Sanity check that reclen is not zero and dr_len is greater than * reclen but at least 34 */ if (reclen == 0 || reclen < dr_len || dr_len < 34) { archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC, "Invalid length of directory record"); return (NULL); } name_len = (size_t)isodirrec[DR_name_len_offset]; location = archive_le32dec(isodirrec + DR_extent_offset); fsize = toi(isodirrec + DR_size_offset, DR_size_size); /* Sanity check that name_len doesn't exceed dr_len. */ if (dr_len - 33 < name_len || name_len == 0) { archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC, "Invalid length of file identifier"); return (NULL); } /* Sanity check that location doesn't exceed volume block. * Don't check lower limit of location; it's possibility * the location has negative value when file type is symbolic * link or file size is zero. As far as I know latest mkisofs * do that. */ if (location > 0 && (location + ((fsize + iso9660->logical_block_size -1) / iso9660->logical_block_size)) > (uint32_t)iso9660->volume_block) { archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC, "Invalid location of extent of file"); return (NULL); } /* Sanity check that location doesn't have a negative value * when the file is not empty. it's too large. */ if (fsize != 0 && location < 0) { archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC, "Invalid location of extent of file"); return (NULL); } /* Sanity check that this entry does not create a cycle. */ offset = iso9660->logical_block_size * (uint64_t)location; for (filep = parent; filep != NULL; filep = filep->parent) { if (filep->offset == offset) { archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT, "Directory structure contains loop"); return (NULL); } } /* Create a new file entry and copy data from the ISO dir record. */ file = (struct file_info *)calloc(1, sizeof(*file)); if (file == NULL) { archive_set_error(&a->archive, ENOMEM, "No memory for file entry"); return (NULL); } file->parent = parent; file->offset = offset; file->size = fsize; file->mtime = isodate7(isodirrec + DR_date_offset); file->ctime = file->atime = file->mtime; file->rede_files.first = NULL; file->rede_files.last = &(file->rede_files.first); p = isodirrec + DR_name_offset; /* Rockridge extensions (if any) follow name. Compute this * before fidgeting the name_len below. */ rr_start = p + name_len + (name_len & 1 ? 0 : 1); rr_end = isodirrec + dr_len; if (iso9660->seenJoliet) { /* Joliet names are max 64 chars (128 bytes) according to spec, * but genisoimage/mkisofs allows recording longer Joliet * names which are 103 UCS2 characters(206 bytes) by their * option '-joliet-long'. */ if (name_len > 206) name_len = 206; name_len &= ~1; /* trim trailing first version and dot from filename. * * Remember we were in UTF-16BE land! * SEPARATOR 1 (.) and SEPARATOR 2 (;) are both * 16 bits big endian characters on Joliet. * * TODO: sanitize filename? * Joliet allows any UCS-2 char except: * *, /, :, ;, ? and \. */ /* Chop off trailing ';1' from files. */ if (name_len > 4 && p[name_len-4] == 0 && p[name_len-3] == ';' && p[name_len-2] == 0 && p[name_len-1] == '1') name_len -= 4; #if 0 /* XXX: this somehow manages to strip of single-character file extensions, like '.c'. */ /* Chop off trailing '.' from filenames. */ if (name_len > 2 && p[name_len-2] == 0 && p[name_len-1] == '.') name_len -= 2; #endif if ((file->utf16be_name = malloc(name_len)) == NULL) { archive_set_error(&a->archive, ENOMEM, "No memory for file name"); goto fail; } memcpy(file->utf16be_name, p, name_len); file->utf16be_bytes = name_len; } else { /* Chop off trailing ';1' from files. */ if (name_len > 2 && p[name_len - 2] == ';' && p[name_len - 1] == '1') name_len -= 2; /* Chop off trailing '.' from filenames. */ if (name_len > 1 && p[name_len - 1] == '.') --name_len; archive_strncpy(&file->name, (const char *)p, name_len); } flags = isodirrec[DR_flags_offset]; if (flags & 0x02) file->mode = AE_IFDIR | 0700; else file->mode = AE_IFREG | 0400; if (flags & 0x80) file->multi_extent = 1; else file->multi_extent = 0; /* * Use a location for the file number, which is treated as an inode * number to find out hardlink target. If Rockridge extensions is * being used, the file number will be overwritten by FILE SERIAL * NUMBER of RRIP "PX" extension. * Note: Old mkisofs did not record that FILE SERIAL NUMBER * in ISO images. * Note2: xorriso set 0 to the location of a symlink file. */ if (file->size == 0 && location >= 0) { /* If file->size is zero, its location points wrong place, * and so we should not use it for the file number. * When the location has negative value, it can be used * for the file number. */ file->number = -1; /* Do not appear before any directory entries. */ file->offset = -1; } else file->number = (int64_t)(uint32_t)location; /* Rockridge extensions overwrite information from above. */ if (iso9660->opt_support_rockridge) { if (parent == NULL && rr_end - rr_start >= 7) { p = rr_start; if (memcmp(p, "SP\x07\x01\xbe\xef", 6) == 0) { /* * SP extension stores the suspOffset * (Number of bytes to skip between * filename and SUSP records.) * It is mandatory by the SUSP standard * (IEEE 1281). * * It allows SUSP to coexist with * non-SUSP uses of the System * Use Area by placing non-SUSP data * before SUSP data. * * SP extension must be in the root * directory entry, disable all SUSP * processing if not found. */ iso9660->suspOffset = p[6]; iso9660->seenSUSP = 1; rr_start += 7; } } if (iso9660->seenSUSP) { int r; file->name_continues = 0; file->symlink_continues = 0; rr_start += iso9660->suspOffset; r = parse_rockridge(a, file, rr_start, rr_end); if (r != ARCHIVE_OK) goto fail; /* * A file size of symbolic link files in ISO images * made by makefs is not zero and its location is * the same as those of next regular file. That is * the same as hard like file and it causes unexpected * error. */ if (file->size > 0 && (file->mode & AE_IFMT) == AE_IFLNK) { file->size = 0; file->number = -1; file->offset = -1; } } else /* If there isn't SUSP, disable parsing * rock ridge extensions. */ iso9660->opt_support_rockridge = 0; } file->nlinks = 1;/* Reset nlink. we'll calculate it later. */ /* Tell file's parent how many children that parent has. */ if (parent != NULL && (flags & 0x02)) parent->subdirs++; if (iso9660->seenRockridge) { if (parent != NULL && parent->parent == NULL && (flags & 0x02) && iso9660->rr_moved == NULL && file->name.s && (strcmp(file->name.s, "rr_moved") == 0 || strcmp(file->name.s, ".rr_moved") == 0)) { iso9660->rr_moved = file; file->rr_moved = 1; file->rr_moved_has_re_only = 1; file->re = 0; parent->subdirs--; } else if (file->re) { /* * Sanity check: file's parent is rr_moved. */ if (parent == NULL || parent->rr_moved == 0) { archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC, "Invalid Rockridge RE"); goto fail; } /* * Sanity check: file does not have "CL" extension. */ if (file->cl_offset) { archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC, "Invalid Rockridge RE and CL"); goto fail; } /* * Sanity check: The file type must be a directory. */ if ((flags & 0x02) == 0) { archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC, "Invalid Rockridge RE"); goto fail; } } else if (parent != NULL && parent->rr_moved) file->rr_moved_has_re_only = 0; else if (parent != NULL && (flags & 0x02) && (parent->re || parent->re_descendant)) file->re_descendant = 1; if (file->cl_offset) { struct file_info *r; if (parent == NULL || parent->parent == NULL) { archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC, "Invalid Rockridge CL"); goto fail; } /* * Sanity check: The file type must be a regular file. */ if ((flags & 0x02) != 0) { archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC, "Invalid Rockridge CL"); goto fail; } parent->subdirs++; /* Overwrite an offset and a number of this "CL" entry * to appear before other dirs. "+1" to those is to * make sure to appear after "RE" entry which this * "CL" entry should be connected with. */ file->offset = file->number = file->cl_offset + 1; /* * Sanity check: cl_offset does not point at its * the parents or itself. */ for (r = parent; r; r = r->parent) { if (r->offset == file->cl_offset) { archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC, "Invalid Rockridge CL"); goto fail; } } if (file->cl_offset == file->offset || parent->rr_moved) { archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC, "Invalid Rockridge CL"); goto fail; } } } #if DEBUG /* DEBUGGING: Warn about attributes I don't yet fully support. */ if ((flags & ~0x02) != 0) { fprintf(stderr, "\n ** Unrecognized flag: "); dump_isodirrec(stderr, isodirrec); fprintf(stderr, "\n"); } else if (toi(isodirrec + DR_volume_sequence_number_offset, 2) != 1) { fprintf(stderr, "\n ** Unrecognized sequence number: "); dump_isodirrec(stderr, isodirrec); fprintf(stderr, "\n"); } else if (*(isodirrec + DR_file_unit_size_offset) != 0) { fprintf(stderr, "\n ** Unexpected file unit size: "); dump_isodirrec(stderr, isodirrec); fprintf(stderr, "\n"); } else if (*(isodirrec + DR_interleave_offset) != 0) { fprintf(stderr, "\n ** Unexpected interleave: "); dump_isodirrec(stderr, isodirrec); fprintf(stderr, "\n"); } else if (*(isodirrec + DR_ext_attr_length_offset) != 0) { fprintf(stderr, "\n ** Unexpected extended attribute length: "); dump_isodirrec(stderr, isodirrec); fprintf(stderr, "\n"); } #endif register_file(iso9660, file); return (file); fail: archive_string_free(&file->name); free(file); return (NULL); } static int parse_rockridge(struct archive_read *a, struct file_info *file, const unsigned char *p, const unsigned char *end) { struct iso9660 *iso9660; int entry_seen = 0; iso9660 = (struct iso9660 *)(a->format->data); while (p + 4 <= end /* Enough space for another entry. */ && p[0] >= 'A' && p[0] <= 'Z' /* Sanity-check 1st char of name. */ && p[1] >= 'A' && p[1] <= 'Z' /* Sanity-check 2nd char of name. */ && p[2] >= 4 /* Sanity-check length. */ && p + p[2] <= end) { /* Sanity-check length. */ const unsigned char *data = p + 4; int data_length = p[2] - 4; int version = p[3]; switch(p[0]) { case 'C': if (p[1] == 'E') { if (version == 1 && data_length == 24) { /* * CE extension comprises: * 8 byte sector containing extension * 8 byte offset w/in above sector * 8 byte length of continuation */ int32_t location = archive_le32dec(data); file->ce_offset = archive_le32dec(data+8); file->ce_size = archive_le32dec(data+16); if (register_CE(a, location, file) != ARCHIVE_OK) return (ARCHIVE_FATAL); } } else if (p[1] == 'L') { if (version == 1 && data_length == 8) { file->cl_offset = (uint64_t) iso9660->logical_block_size * (uint64_t)archive_le32dec(data); iso9660->seenRockridge = 1; } } break; case 'N': if (p[1] == 'M') { if (version == 1) { parse_rockridge_NM1(file, data, data_length); iso9660->seenRockridge = 1; } } break; case 'P': /* * PD extension is padding; * contents are always ignored. * * PL extension won't appear; * contents are always ignored. */ if (p[1] == 'N') { if (version == 1 && data_length == 16) { file->rdev = toi(data,4); file->rdev <<= 32; file->rdev |= toi(data + 8, 4); iso9660->seenRockridge = 1; } } else if (p[1] == 'X') { /* * PX extension comprises: * 8 bytes for mode, * 8 bytes for nlinks, * 8 bytes for uid, * 8 bytes for gid, * 8 bytes for inode. */ if (version == 1) { if (data_length >= 8) file->mode = toi(data, 4); if (data_length >= 16) file->nlinks = toi(data + 8, 4); if (data_length >= 24) file->uid = toi(data + 16, 4); if (data_length >= 32) file->gid = toi(data + 24, 4); if (data_length >= 40) file->number = toi(data + 32, 4); iso9660->seenRockridge = 1; } } break; case 'R': if (p[1] == 'E' && version == 1) { file->re = 1; iso9660->seenRockridge = 1; } else if (p[1] == 'R' && version == 1) { /* * RR extension comprises: * one byte flag value * This extension is obsolete, * so contents are always ignored. */ } break; case 'S': if (p[1] == 'L') { if (version == 1) { parse_rockridge_SL1(file, data, data_length); iso9660->seenRockridge = 1; } } else if (p[1] == 'T' && data_length == 0 && version == 1) { /* * ST extension marks end of this * block of SUSP entries. * * It allows SUSP to coexist with * non-SUSP uses of the System * Use Area by placing non-SUSP data * after SUSP data. */ iso9660->seenSUSP = 0; iso9660->seenRockridge = 0; return (ARCHIVE_OK); } break; case 'T': if (p[1] == 'F') { if (version == 1) { parse_rockridge_TF1(file, data, data_length); iso9660->seenRockridge = 1; } } break; case 'Z': if (p[1] == 'F') { if (version == 1) parse_rockridge_ZF1(file, data, data_length); } break; default: break; } p += p[2]; entry_seen = 1; } if (entry_seen) return (ARCHIVE_OK); else { archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT, "Tried to parse Rockridge extensions, but none found"); return (ARCHIVE_WARN); } } static int register_CE(struct archive_read *a, int32_t location, struct file_info *file) { struct iso9660 *iso9660; struct read_ce_queue *heap; struct read_ce_req *p; uint64_t offset, parent_offset; int hole, parent; iso9660 = (struct iso9660 *)(a->format->data); offset = ((uint64_t)location) * (uint64_t)iso9660->logical_block_size; if (((file->mode & AE_IFMT) == AE_IFREG && offset >= file->offset) || offset < iso9660->current_position || (((uint64_t)file->ce_offset) + file->ce_size) > (uint64_t)iso9660->logical_block_size || offset + file->ce_offset + file->ce_size > iso9660->volume_size) { archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC, "Invalid parameter in SUSP \"CE\" extension"); return (ARCHIVE_FATAL); } /* Expand our CE list as necessary. */ heap = &(iso9660->read_ce_req); if (heap->cnt >= heap->allocated) { int new_size; if (heap->allocated < 16) new_size = 16; else new_size = heap->allocated * 2; /* Overflow might keep us from growing the list. */ if (new_size <= heap->allocated) { archive_set_error(&a->archive, ENOMEM, "Out of memory"); return (ARCHIVE_FATAL); } p = calloc(new_size, sizeof(p[0])); if (p == NULL) { archive_set_error(&a->archive, ENOMEM, "Out of memory"); return (ARCHIVE_FATAL); } if (heap->reqs != NULL) { memcpy(p, heap->reqs, heap->cnt * sizeof(*p)); free(heap->reqs); } heap->reqs = p; heap->allocated = new_size; } /* * Start with hole at end, walk it up tree to find insertion point. */ hole = heap->cnt++; while (hole > 0) { parent = (hole - 1)/2; parent_offset = heap->reqs[parent].offset; if (offset >= parent_offset) { heap->reqs[hole].offset = offset; heap->reqs[hole].file = file; return (ARCHIVE_OK); } /* Move parent into hole <==> move hole up tree. */ heap->reqs[hole] = heap->reqs[parent]; hole = parent; } heap->reqs[0].offset = offset; heap->reqs[0].file = file; return (ARCHIVE_OK); } static void next_CE(struct read_ce_queue *heap) { uint64_t a_offset, b_offset, c_offset; int a, b, c; struct read_ce_req tmp; if (heap->cnt < 1) return; /* * Move the last item in the heap to the root of the tree */ heap->reqs[0] = heap->reqs[--(heap->cnt)]; /* * Rebalance the heap. */ a = 0; /* Starting element and its offset */ a_offset = heap->reqs[a].offset; for (;;) { b = a + a + 1; /* First child */ if (b >= heap->cnt) return; b_offset = heap->reqs[b].offset; c = b + 1; /* Use second child if it is smaller. */ if (c < heap->cnt) { c_offset = heap->reqs[c].offset; if (c_offset < b_offset) { b = c; b_offset = c_offset; } } if (a_offset <= b_offset) return; tmp = heap->reqs[a]; heap->reqs[a] = heap->reqs[b]; heap->reqs[b] = tmp; a = b; } } static int read_CE(struct archive_read *a, struct iso9660 *iso9660) { struct read_ce_queue *heap; const unsigned char *b, *p, *end; struct file_info *file; size_t step; int r; /* Read data which RRIP "CE" extension points. */ heap = &(iso9660->read_ce_req); step = iso9660->logical_block_size; while (heap->cnt && heap->reqs[0].offset == iso9660->current_position) { b = __archive_read_ahead(a, step, NULL); if (b == NULL) { archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC, "Failed to read full block when scanning " "ISO9660 directory list"); return (ARCHIVE_FATAL); } do { file = heap->reqs[0].file; if (file->ce_offset + file->ce_size > step) { archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT, "Malformed CE information"); return (ARCHIVE_FATAL); } p = b + file->ce_offset; end = p + file->ce_size; next_CE(heap); r = parse_rockridge(a, file, p, end); if (r != ARCHIVE_OK) return (ARCHIVE_FATAL); } while (heap->cnt && heap->reqs[0].offset == iso9660->current_position); /* NOTE: Do not move this consume's code to front of * do-while loop. Registration of nested CE extension * might cause error because of current position. */ __archive_read_consume(a, step); iso9660->current_position += step; } return (ARCHIVE_OK); } static void parse_rockridge_NM1(struct file_info *file, const unsigned char *data, int data_length) { if (!file->name_continues) archive_string_empty(&file->name); file->name_continues = 0; if (data_length < 1) return; /* * NM version 1 extension comprises: * 1 byte flag, value is one of: * = 0: remainder is name * = 1: remainder is name, next NM entry continues name * = 2: "." * = 4: ".." * = 32: Implementation specific * All other values are reserved. */ switch(data[0]) { case 0: if (data_length < 2) return; archive_strncat(&file->name, (const char *)data + 1, data_length - 1); break; case 1: if (data_length < 2) return; archive_strncat(&file->name, (const char *)data + 1, data_length - 1); file->name_continues = 1; break; case 2: archive_strcat(&file->name, "."); break; case 4: archive_strcat(&file->name, ".."); break; default: return; } } static void parse_rockridge_TF1(struct file_info *file, const unsigned char *data, int data_length) { char flag; /* * TF extension comprises: * one byte flag * create time (optional) * modify time (optional) * access time (optional) * attribute time (optional) * Time format and presence of fields * is controlled by flag bits. */ if (data_length < 1) return; flag = data[0]; ++data; --data_length; if (flag & 0x80) { /* Use 17-byte time format. */ if ((flag & 1) && data_length >= 17) { /* Create time. */ file->birthtime_is_set = 1; file->birthtime = isodate17(data); data += 17; data_length -= 17; } if ((flag & 2) && data_length >= 17) { /* Modify time. */ file->mtime = isodate17(data); data += 17; data_length -= 17; } if ((flag & 4) && data_length >= 17) { /* Access time. */ file->atime = isodate17(data); data += 17; data_length -= 17; } if ((flag & 8) && data_length >= 17) { /* Attribute change time. */ file->ctime = isodate17(data); } } else { /* Use 7-byte time format. */ if ((flag & 1) && data_length >= 7) { /* Create time. */ file->birthtime_is_set = 1; file->birthtime = isodate7(data); data += 7; data_length -= 7; } if ((flag & 2) && data_length >= 7) { /* Modify time. */ file->mtime = isodate7(data); data += 7; data_length -= 7; } if ((flag & 4) && data_length >= 7) { /* Access time. */ file->atime = isodate7(data); data += 7; data_length -= 7; } if ((flag & 8) && data_length >= 7) { /* Attribute change time. */ file->ctime = isodate7(data); } } } static void parse_rockridge_SL1(struct file_info *file, const unsigned char *data, int data_length) { const char *separator = ""; if (!file->symlink_continues || file->symlink.length < 1) archive_string_empty(&file->symlink); file->symlink_continues = 0; /* * Defined flag values: * 0: This is the last SL record for this symbolic link * 1: this symbolic link field continues in next SL entry * All other values are reserved. */ if (data_length < 1) return; switch(*data) { case 0: break; case 1: file->symlink_continues = 1; break; default: return; } ++data; /* Skip flag byte. */ --data_length; /* * SL extension body stores "components". * Basically, this is a complicated way of storing * a POSIX path. It also interferes with using * symlinks for storing non-path data. * * Each component is 2 bytes (flag and length) * possibly followed by name data. */ while (data_length >= 2) { unsigned char flag = *data++; unsigned char nlen = *data++; data_length -= 2; archive_strcat(&file->symlink, separator); separator = "/"; switch(flag) { case 0: /* Usual case, this is text. */ if (data_length < nlen) return; archive_strncat(&file->symlink, (const char *)data, nlen); break; case 0x01: /* Text continues in next component. */ if (data_length < nlen) return; archive_strncat(&file->symlink, (const char *)data, nlen); separator = ""; break; case 0x02: /* Current dir. */ archive_strcat(&file->symlink, "."); break; case 0x04: /* Parent dir. */ archive_strcat(&file->symlink, ".."); break; case 0x08: /* Root of filesystem. */ archive_strcat(&file->symlink, "/"); separator = ""; break; case 0x10: /* Undefined (historically "volume root" */ archive_string_empty(&file->symlink); archive_strcat(&file->symlink, "ROOT"); break; case 0x20: /* Undefined (historically "hostname") */ archive_strcat(&file->symlink, "hostname"); break; default: /* TODO: issue a warning ? */ return; } data += nlen; data_length -= nlen; } } static void parse_rockridge_ZF1(struct file_info *file, const unsigned char *data, int data_length) { if (data[0] == 0x70 && data[1] == 0x7a && data_length == 12) { /* paged zlib */ file->pz = 1; file->pz_log2_bs = data[3]; file->pz_uncompressed_size = archive_le32dec(&data[4]); } } static void register_file(struct iso9660 *iso9660, struct file_info *file) { file->use_next = iso9660->use_files; iso9660->use_files = file; } static void release_files(struct iso9660 *iso9660) { struct content *con, *connext; struct file_info *file; file = iso9660->use_files; while (file != NULL) { struct file_info *next = file->use_next; archive_string_free(&file->name); archive_string_free(&file->symlink); free(file->utf16be_name); con = file->contents.first; while (con != NULL) { connext = con->next; free(con); con = connext; } free(file); file = next; } } static int next_entry_seek(struct archive_read *a, struct iso9660 *iso9660, struct file_info **pfile) { struct file_info *file; int r; r = next_cache_entry(a, iso9660, pfile); if (r != ARCHIVE_OK) return (r); file = *pfile; /* Don't waste time seeking for zero-length bodies. */ if (file->size == 0) file->offset = iso9660->current_position; /* flush any remaining bytes from the last round to ensure * we're positioned */ if (iso9660->entry_bytes_unconsumed) { __archive_read_consume(a, iso9660->entry_bytes_unconsumed); iso9660->entry_bytes_unconsumed = 0; } /* Seek forward to the start of the entry. */ if (iso9660->current_position < file->offset) { int64_t step; step = file->offset - iso9660->current_position; step = __archive_read_consume(a, step); if (step < 0) return ((int)step); iso9660->current_position = file->offset; } /* We found body of file; handle it now. */ return (ARCHIVE_OK); } static int next_cache_entry(struct archive_read *a, struct iso9660 *iso9660, struct file_info **pfile) { struct file_info *file; struct { struct file_info *first; struct file_info **last; } empty_files; int64_t number; int count; file = cache_get_entry(iso9660); if (file != NULL) { *pfile = file; return (ARCHIVE_OK); } for (;;) { struct file_info *re, *d; *pfile = file = next_entry(iso9660); if (file == NULL) { /* * If directory entries all which are descendant of * rr_moved are still remaining, expose their. */ if (iso9660->re_files.first != NULL && iso9660->rr_moved != NULL && iso9660->rr_moved->rr_moved_has_re_only) /* Expose "rr_moved" entry. */ cache_add_entry(iso9660, iso9660->rr_moved); while ((re = re_get_entry(iso9660)) != NULL) { /* Expose its descendant dirs. */ while ((d = rede_get_entry(re)) != NULL) cache_add_entry(iso9660, d); } if (iso9660->cache_files.first != NULL) return (next_cache_entry(a, iso9660, pfile)); return (ARCHIVE_EOF); } if (file->cl_offset) { struct file_info *first_re = NULL; int nexted_re = 0; /* * Find "RE" dir for the current file, which * has "CL" flag. */ while ((re = re_get_entry(iso9660)) != first_re) { if (first_re == NULL) first_re = re; if (re->offset == file->cl_offset) { re->parent->subdirs--; re->parent = file->parent; re->re = 0; if (re->parent->re_descendant) { nexted_re = 1; re->re_descendant = 1; if (rede_add_entry(re) < 0) goto fatal_rr; /* Move a list of descendants * to a new ancestor. */ while ((d = rede_get_entry( re)) != NULL) if (rede_add_entry(d) < 0) goto fatal_rr; break; } /* Replace the current file * with "RE" dir */ *pfile = file = re; /* Expose its descendant */ while ((d = rede_get_entry( file)) != NULL) cache_add_entry( iso9660, d); break; } else re_add_entry(iso9660, re); } if (nexted_re) { /* * Do not expose this at this time * because we have not gotten its full-path * name yet. */ continue; } } else if ((file->mode & AE_IFMT) == AE_IFDIR) { int r; /* Read file entries in this dir. */ r = read_children(a, file); if (r != ARCHIVE_OK) return (r); /* * Handle a special dir of Rockridge extensions, * "rr_moved". */ if (file->rr_moved) { /* * If this has only the subdirectories which * have "RE" flags, do not expose at this time. */ if (file->rr_moved_has_re_only) continue; /* Otherwise expose "rr_moved" entry. */ } else if (file->re) { /* * Do not expose this at this time * because we have not gotten its full-path * name yet. */ re_add_entry(iso9660, file); continue; } else if (file->re_descendant) { /* * If the top level "RE" entry of this entry * is not exposed, we, accordingly, should not * expose this entry at this time because * we cannot make its proper full-path name. */ if (rede_add_entry(file) == 0) continue; /* Otherwise we can expose this entry because * it seems its top level "RE" has already been * exposed. */ } } break; } if ((file->mode & AE_IFMT) != AE_IFREG || file->number == -1) return (ARCHIVE_OK); count = 0; number = file->number; iso9660->cache_files.first = NULL; iso9660->cache_files.last = &(iso9660->cache_files.first); empty_files.first = NULL; empty_files.last = &empty_files.first; /* Collect files which has the same file serial number. * Peek pending_files so that file which number is different * is not put back. */ while (iso9660->pending_files.used > 0 && (iso9660->pending_files.files[0]->number == -1 || iso9660->pending_files.files[0]->number == number)) { if (file->number == -1) { /* This file has the same offset * but it's wrong offset which empty files * and symlink files have. * NOTE: This wrong offset was recorded by * old mkisofs utility. If ISO images is * created by latest mkisofs, this does not * happen. */ file->next = NULL; *empty_files.last = file; empty_files.last = &(file->next); } else { count++; cache_add_entry(iso9660, file); } file = next_entry(iso9660); } if (count == 0) { *pfile = file; return ((file == NULL)?ARCHIVE_EOF:ARCHIVE_OK); } if (file->number == -1) { file->next = NULL; *empty_files.last = file; empty_files.last = &(file->next); } else { count++; cache_add_entry(iso9660, file); } if (count > 1) { /* The count is the same as number of hardlink, * so much so that each nlinks of files in cache_file * is overwritten by value of the count. */ for (file = iso9660->cache_files.first; file != NULL; file = file->next) file->nlinks = count; } /* If there are empty files, that files are added * to the tail of the cache_files. */ if (empty_files.first != NULL) { *iso9660->cache_files.last = empty_files.first; iso9660->cache_files.last = empty_files.last; } *pfile = cache_get_entry(iso9660); return ((*pfile == NULL)?ARCHIVE_EOF:ARCHIVE_OK); fatal_rr: archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC, "Failed to connect 'CL' pointer to 'RE' rr_moved pointer of " "Rockridge extensions: current position = %jd, CL offset = %jd", (intmax_t)iso9660->current_position, (intmax_t)file->cl_offset); return (ARCHIVE_FATAL); } static inline void re_add_entry(struct iso9660 *iso9660, struct file_info *file) { file->re_next = NULL; *iso9660->re_files.last = file; iso9660->re_files.last = &(file->re_next); } static inline struct file_info * re_get_entry(struct iso9660 *iso9660) { struct file_info *file; if ((file = iso9660->re_files.first) != NULL) { iso9660->re_files.first = file->re_next; if (iso9660->re_files.first == NULL) iso9660->re_files.last = &(iso9660->re_files.first); } return (file); } static inline int rede_add_entry(struct file_info *file) { struct file_info *re; /* * Find "RE" entry. */ re = file->parent; while (re != NULL && !re->re) re = re->parent; if (re == NULL) return (-1); file->re_next = NULL; *re->rede_files.last = file; re->rede_files.last = &(file->re_next); return (0); } static inline struct file_info * rede_get_entry(struct file_info *re) { struct file_info *file; if ((file = re->rede_files.first) != NULL) { re->rede_files.first = file->re_next; if (re->rede_files.first == NULL) re->rede_files.last = &(re->rede_files.first); } return (file); } static inline void cache_add_entry(struct iso9660 *iso9660, struct file_info *file) { file->next = NULL; *iso9660->cache_files.last = file; iso9660->cache_files.last = &(file->next); } static inline struct file_info * cache_get_entry(struct iso9660 *iso9660) { struct file_info *file; if ((file = iso9660->cache_files.first) != NULL) { iso9660->cache_files.first = file->next; if (iso9660->cache_files.first == NULL) iso9660->cache_files.last = &(iso9660->cache_files.first); } return (file); } static int heap_add_entry(struct archive_read *a, struct heap_queue *heap, struct file_info *file, uint64_t key) { uint64_t file_key, parent_key; int hole, parent; /* Expand our pending files list as necessary. */ if (heap->used >= heap->allocated) { struct file_info **new_pending_files; int new_size = heap->allocated * 2; if (heap->allocated < 1024) new_size = 1024; /* Overflow might keep us from growing the list. */ if (new_size <= heap->allocated) { archive_set_error(&a->archive, ENOMEM, "Out of memory"); return (ARCHIVE_FATAL); } new_pending_files = (struct file_info **) malloc(new_size * sizeof(new_pending_files[0])); if (new_pending_files == NULL) { archive_set_error(&a->archive, ENOMEM, "Out of memory"); return (ARCHIVE_FATAL); } if (heap->allocated) memcpy(new_pending_files, heap->files, heap->allocated * sizeof(new_pending_files[0])); free(heap->files); heap->files = new_pending_files; heap->allocated = new_size; } file_key = file->key = key; /* * Start with hole at end, walk it up tree to find insertion point. */ hole = heap->used++; while (hole > 0) { parent = (hole - 1)/2; parent_key = heap->files[parent]->key; if (file_key >= parent_key) { heap->files[hole] = file; return (ARCHIVE_OK); } /* Move parent into hole <==> move hole up tree. */ heap->files[hole] = heap->files[parent]; hole = parent; } heap->files[0] = file; return (ARCHIVE_OK); } static struct file_info * heap_get_entry(struct heap_queue *heap) { uint64_t a_key, b_key, c_key; int a, b, c; struct file_info *r, *tmp; if (heap->used < 1) return (NULL); /* * The first file in the list is the earliest; we'll return this. */ r = heap->files[0]; /* * Move the last item in the heap to the root of the tree */ heap->files[0] = heap->files[--(heap->used)]; /* * Rebalance the heap. */ a = 0; /* Starting element and its heap key */ a_key = heap->files[a]->key; for (;;) { b = a + a + 1; /* First child */ if (b >= heap->used) return (r); b_key = heap->files[b]->key; c = b + 1; /* Use second child if it is smaller. */ if (c < heap->used) { c_key = heap->files[c]->key; if (c_key < b_key) { b = c; b_key = c_key; } } if (a_key <= b_key) return (r); tmp = heap->files[a]; heap->files[a] = heap->files[b]; heap->files[b] = tmp; a = b; } } static unsigned int toi(const void *p, int n) { const unsigned char *v = (const unsigned char *)p; if (n > 1) return v[0] + 256 * toi(v + 1, n - 1); if (n == 1) return v[0]; return (0); } static time_t isodate7(const unsigned char *v) { struct tm tm; int offset; time_t t; memset(&tm, 0, sizeof(tm)); tm.tm_year = v[0]; tm.tm_mon = v[1] - 1; tm.tm_mday = v[2]; tm.tm_hour = v[3]; tm.tm_min = v[4]; tm.tm_sec = v[5]; /* v[6] is the signed timezone offset, in 1/4-hour increments. */ offset = ((const signed char *)v)[6]; if (offset > -48 && offset < 52) { tm.tm_hour -= offset / 4; tm.tm_min -= (offset % 4) * 15; } t = time_from_tm(&tm); if (t == (time_t)-1) return ((time_t)0); return (t); } static time_t isodate17(const unsigned char *v) { struct tm tm; int offset; time_t t; memset(&tm, 0, sizeof(tm)); tm.tm_year = (v[0] - '0') * 1000 + (v[1] - '0') * 100 + (v[2] - '0') * 10 + (v[3] - '0') - 1900; tm.tm_mon = (v[4] - '0') * 10 + (v[5] - '0'); tm.tm_mday = (v[6] - '0') * 10 + (v[7] - '0'); tm.tm_hour = (v[8] - '0') * 10 + (v[9] - '0'); tm.tm_min = (v[10] - '0') * 10 + (v[11] - '0'); tm.tm_sec = (v[12] - '0') * 10 + (v[13] - '0'); /* v[16] is the signed timezone offset, in 1/4-hour increments. */ offset = ((const signed char *)v)[16]; if (offset > -48 && offset < 52) { tm.tm_hour -= offset / 4; tm.tm_min -= (offset % 4) * 15; } t = time_from_tm(&tm); if (t == (time_t)-1) return ((time_t)0); return (t); } static time_t time_from_tm(struct tm *t) { #if HAVE__MKGMTIME return _mkgmtime(t); #elif HAVE_TIMEGM /* Use platform timegm() if available. */ return (timegm(t)); #else /* Else use direct calculation using POSIX assumptions. */ /* First, fix up tm_yday based on the year/month/day. */ if (mktime(t) == (time_t)-1) return ((time_t)-1); /* Then we can compute timegm() from first principles. */ return (t->tm_sec + t->tm_min * 60 + t->tm_hour * 3600 + t->tm_yday * 86400 + (t->tm_year - 70) * 31536000 + ((t->tm_year - 69) / 4) * 86400 - ((t->tm_year - 1) / 100) * 86400 + ((t->tm_year + 299) / 400) * 86400); #endif } static const char * build_pathname(struct archive_string *as, struct file_info *file, int depth) { // Plain ISO9660 only allows 8 dir levels; if we get // to 1000, then something is very, very wrong. if (depth > 1000) { return NULL; } if (file->parent != NULL && archive_strlen(&file->parent->name) > 0) { if (build_pathname(as, file->parent, depth + 1) == NULL) { return NULL; } archive_strcat(as, "/"); } if (archive_strlen(&file->name) == 0) archive_strcat(as, "."); else archive_string_concat(as, &file->name); return (as->s); } static int build_pathname_utf16be(unsigned char *p, size_t max, size_t *len, struct file_info *file) { if (file->parent != NULL && file->parent->utf16be_bytes > 0) { if (build_pathname_utf16be(p, max, len, file->parent) != 0) return (-1); p[*len] = 0; p[*len + 1] = '/'; *len += 2; } if (file->utf16be_bytes == 0) { if (*len + 2 > max) return (-1);/* Path is too long! */ p[*len] = 0; p[*len + 1] = '.'; *len += 2; } else { if (*len + file->utf16be_bytes > max) return (-1);/* Path is too long! */ memcpy(p + *len, file->utf16be_name, file->utf16be_bytes); *len += file->utf16be_bytes; } return (0); } #if DEBUG static void dump_isodirrec(FILE *out, const unsigned char *isodirrec) { fprintf(out, " l %d,", toi(isodirrec + DR_length_offset, DR_length_size)); fprintf(out, " a %d,", toi(isodirrec + DR_ext_attr_length_offset, DR_ext_attr_length_size)); fprintf(out, " ext 0x%x,", toi(isodirrec + DR_extent_offset, DR_extent_size)); fprintf(out, " s %d,", toi(isodirrec + DR_size_offset, DR_extent_size)); fprintf(out, " f 0x%x,", toi(isodirrec + DR_flags_offset, DR_flags_size)); fprintf(out, " u %d,", toi(isodirrec + DR_file_unit_size_offset, DR_file_unit_size_size)); fprintf(out, " ilv %d,", toi(isodirrec + DR_interleave_offset, DR_interleave_size)); fprintf(out, " seq %d,", toi(isodirrec + DR_volume_sequence_number_offset, DR_volume_sequence_number_size)); fprintf(out, " nl %d:", toi(isodirrec + DR_name_len_offset, DR_name_len_size)); fprintf(out, " `%.*s'", toi(isodirrec + DR_name_len_offset, DR_name_len_size), isodirrec + DR_name_offset); } #endif