contrib/libarchive/libarchive/archive_read_support_format_iso9660.c

   1 /*-
   2  * Copyright (c) 2003-2007 Tim Kientzle
   3  * Copyright (c) 2009 Andreas Henriksson <andreas@fatal.se>
   4  * Copyright (c) 2009-2012 Michihiro NAKAJIMA
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR
  17  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  18  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  19  * IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT,
  20  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  21  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  22  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  23  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  24  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  25  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  26  */
  27
  28 #include "archive_platform.h"
  29 __FBSDID("$FreeBSD$");
  30
  31 #ifdef HAVE_ERRNO_H
  32 #include <errno.h>
  33 #endif
  34 /* #include <stdint.h> */ /* See archive_platform.h */
  35 #include <stdio.h>
  36 #ifdef HAVE_STDLIB_H
  37 #include <stdlib.h>
  38 #endif
  39 #ifdef HAVE_STRING_H
  40 #include <string.h>
  41 #endif
  42 #include <time.h>
  43 #ifdef HAVE_ZLIB_H
  44 #include <zlib.h>
  45 #endif
  46
  47 #include "archive.h"
  48 #include "archive_endian.h"
  49 #include "archive_entry.h"
  50 #include "archive_entry_locale.h"
  51 #include "archive_private.h"
  52 #include "archive_read_private.h"
  53 #include "archive_string.h"
  54
  55 /*
  56  * An overview of ISO 9660 format:
  57  *
  58  * Each disk is laid out as follows:
  59  *   * 32k reserved for private use
  60  *   * Volume descriptor table.  Each volume descriptor
  61  *     is 2k and specifies basic format information.
  62  *     The "Primary Volume Descriptor" (PVD) is defined by the
  63  *     standard and should always be present; other volume
  64  *     descriptors include various vendor-specific extensions.
  65  *   * Files and directories.  Each file/dir is specified by
  66  *     an "extent" (starting sector and length in bytes).
  67  *     Dirs are just files with directory records packed one
  68  *     after another.  The PVD contains a single dir entry
  69  *     specifying the location of the root directory.  Everything
  70  *     else follows from there.
  71  *
  72  * This module works by first reading the volume descriptors, then
  73  * building a list of directory entries, sorted by starting
  74  * sector.  At each step, I look for the earliest dir entry that
  75  * hasn't yet been read, seek forward to that location and read
  76  * that entry.  If it's a dir, I slurp in the new dir entries and
  77  * add them to the heap; if it's a regular file, I return the
  78  * corresponding archive_entry and wait for the client to request
  79  * the file body.  This strategy allows us to read most compliant
  80  * CDs with a single pass through the data, as required by libarchive.
  81  */
  82 #define LOGICAL_BLOCK_SIZE      2048
  83 #define SYSTEM_AREA_BLOCK       16
  84
  85 /* Structure of on-disk primary volume descriptor. */
  86 #define PVD_type_offset 0
  87 #define PVD_type_size 1
  88 #define PVD_id_offset (PVD_type_offset + PVD_type_size)
  89 #define PVD_id_size 5
  90 #define PVD_version_offset (PVD_id_offset + PVD_id_size)
  91 #define PVD_version_size 1
  92 #define PVD_reserved1_offset (PVD_version_offset + PVD_version_size)
  93 #define PVD_reserved1_size 1
  94 #define PVD_system_id_offset (PVD_reserved1_offset + PVD_reserved1_size)
  95 #define PVD_system_id_size 32
  96 #define PVD_volume_id_offset (PVD_system_id_offset + PVD_system_id_size)
  97 #define PVD_volume_id_size 32
  98 #define PVD_reserved2_offset (PVD_volume_id_offset + PVD_volume_id_size)
  99 #define PVD_reserved2_size 8
 100 #define PVD_volume_space_size_offset (PVD_reserved2_offset + PVD_reserved2_size)
 101 #define PVD_volume_space_size_size 8
 102 #define PVD_reserved3_offset (PVD_volume_space_size_offset + PVD_volume_space_size_size)
 103 #define PVD_reserved3_size 32
 104 #define PVD_volume_set_size_offset (PVD_reserved3_offset + PVD_reserved3_size)
 105 #define PVD_volume_set_size_size 4
 106 #define PVD_volume_sequence_number_offset (PVD_volume_set_size_offset + PVD_volume_set_size_size)
 107 #define PVD_volume_sequence_number_size 4
 108 #define PVD_logical_block_size_offset (PVD_volume_sequence_number_offset + PVD_volume_sequence_number_size)
 109 #define PVD_logical_block_size_size 4
 110 #define PVD_path_table_size_offset (PVD_logical_block_size_offset + PVD_logical_block_size_size)
 111 #define PVD_path_table_size_size 8
 112 #define PVD_type_1_path_table_offset (PVD_path_table_size_offset + PVD_path_table_size_size)
 113 #define PVD_type_1_path_table_size 4
 114 #define PVD_opt_type_1_path_table_offset (PVD_type_1_path_table_offset + PVD_type_1_path_table_size)
 115 #define PVD_opt_type_1_path_table_size 4
 116 #define PVD_type_m_path_table_offset (PVD_opt_type_1_path_table_offset + PVD_opt_type_1_path_table_size)
 117 #define PVD_type_m_path_table_size 4
 118 #define PVD_opt_type_m_path_table_offset (PVD_type_m_path_table_offset + PVD_type_m_path_table_size)
 119 #define PVD_opt_type_m_path_table_size 4
 120 #define PVD_root_directory_record_offset (PVD_opt_type_m_path_table_offset + PVD_opt_type_m_path_table_size)
 121 #define PVD_root_directory_record_size 34
 122 #define PVD_volume_set_id_offset (PVD_root_directory_record_offset + PVD_root_directory_record_size)
 123 #define PVD_volume_set_id_size 128
 124 #define PVD_publisher_id_offset (PVD_volume_set_id_offset + PVD_volume_set_id_size)
 125 #define PVD_publisher_id_size 128
 126 #define PVD_preparer_id_offset (PVD_publisher_id_offset + PVD_publisher_id_size)
 127 #define PVD_preparer_id_size 128
 128 #define PVD_application_id_offset (PVD_preparer_id_offset + PVD_preparer_id_size)
 129 #define PVD_application_id_size 128
 130 #define PVD_copyright_file_id_offset (PVD_application_id_offset + PVD_application_id_size)
 131 #define PVD_copyright_file_id_size 37
 132 #define PVD_abstract_file_id_offset (PVD_copyright_file_id_offset + PVD_copyright_file_id_size)
 133 #define PVD_abstract_file_id_size 37
 134 #define PVD_bibliographic_file_id_offset (PVD_abstract_file_id_offset + PVD_abstract_file_id_size)
 135 #define PVD_bibliographic_file_id_size 37
 136 #define PVD_creation_date_offset (PVD_bibliographic_file_id_offset + PVD_bibliographic_file_id_size)
 137 #define PVD_creation_date_size 17
 138 #define PVD_modification_date_offset (PVD_creation_date_offset + PVD_creation_date_size)
 139 #define PVD_modification_date_size 17
 140 #define PVD_expiration_date_offset (PVD_modification_date_offset + PVD_modification_date_size)
 141 #define PVD_expiration_date_size 17
 142 #define PVD_effective_date_offset (PVD_expiration_date_offset + PVD_expiration_date_size)
 143 #define PVD_effective_date_size 17
 144 #define PVD_file_structure_version_offset (PVD_effective_date_offset + PVD_effective_date_size)
 145 #define PVD_file_structure_version_size 1
 146 #define PVD_reserved4_offset (PVD_file_structure_version_offset + PVD_file_structure_version_size)
 147 #define PVD_reserved4_size 1
 148 #define PVD_application_data_offset (PVD_reserved4_offset + PVD_reserved4_size)
 149 #define PVD_application_data_size 512
 150 #define PVD_reserved5_offset (PVD_application_data_offset + PVD_application_data_size)
 151 #define PVD_reserved5_size (2048 - PVD_reserved5_offset)
 152
 153 /* TODO: It would make future maintenance easier to just hardcode the
 154  * above values.  In particular, ECMA119 states the offsets as part of
 155  * the standard.  That would eliminate the need for the following check.*/
 156 #if PVD_reserved5_offset != 1395
 157 #error PVD offset and size definitions are wrong.
 158 #endif
 159
 160
 161 /* Structure of optional on-disk supplementary volume descriptor. */
 162 #define SVD_type_offset 0
 163 #define SVD_type_size 1
 164 #define SVD_id_offset (SVD_type_offset + SVD_type_size)
 165 #define SVD_id_size 5
 166 #define SVD_version_offset (SVD_id_offset + SVD_id_size)
 167 #define SVD_version_size 1
 168 /* ... */
 169 #define SVD_reserved1_offset    72
 170 #define SVD_reserved1_size      8
 171 #define SVD_volume_space_size_offset 80
 172 #define SVD_volume_space_size_size 8
 173 #define SVD_escape_sequences_offset (SVD_volume_space_size_offset + SVD_volume_space_size_size)
 174 #define SVD_escape_sequences_size 32
 175 /* ... */
 176 #define SVD_logical_block_size_offset 128
 177 #define SVD_logical_block_size_size 4
 178 #define SVD_type_L_path_table_offset 140
 179 #define SVD_type_M_path_table_offset 148
 180 /* ... */
 181 #define SVD_root_directory_record_offset 156
 182 #define SVD_root_directory_record_size 34
 183 #define SVD_file_structure_version_offset 881
 184 #define SVD_reserved2_offset    882
 185 #define SVD_reserved2_size      1
 186 #define SVD_reserved3_offset    1395
 187 #define SVD_reserved3_size      653
 188 /* ... */
 189 /* FIXME: validate correctness of last SVD entry offset. */
 190
 191 /* Structure of an on-disk directory record. */
 192 /* Note:  ISO9660 stores each multi-byte integer twice, once in
 193  * each byte order.  The sizes here are the size of just one
 194  * of the two integers.  (This is why the offset of a field isn't
 195  * the same as the offset+size of the previous field.) */
 196 #define DR_length_offset 0
 197 #define DR_length_size 1
 198 #define DR_ext_attr_length_offset 1
 199 #define DR_ext_attr_length_size 1
 200 #define DR_extent_offset 2
 201 #define DR_extent_size 4
 202 #define DR_size_offset 10
 203 #define DR_size_size 4
 204 #define DR_date_offset 18
 205 #define DR_date_size 7
 206 #define DR_flags_offset 25
 207 #define DR_flags_size 1
 208 #define DR_file_unit_size_offset 26
 209 #define DR_file_unit_size_size 1
 210 #define DR_interleave_offset 27
 211 #define DR_interleave_size 1
 212 #define DR_volume_sequence_number_offset 28
 213 #define DR_volume_sequence_number_size 2
 214 #define DR_name_len_offset 32
 215 #define DR_name_len_size 1
 216 #define DR_name_offset 33
 217
 218 #ifdef HAVE_ZLIB_H
 219 static const unsigned char zisofs_magic[8] = {
 220         0x37, 0xE4, 0x53, 0x96, 0xC9, 0xDB, 0xD6, 0x07
 221 };
 222
 223 struct zisofs {
 224         /* Set 1 if this file compressed by paged zlib */
 225         int              pz;
 226         int              pz_log2_bs; /* Log2 of block size */
 227         uint64_t         pz_uncompressed_size;
 228
 229         int              initialized;
 230         unsigned char   *uncompressed_buffer;
 231         size_t           uncompressed_buffer_size;
 232
 233         uint32_t         pz_offset;
 234         unsigned char    header[16];
 235         size_t           header_avail;
 236         int              header_passed;
 237         unsigned char   *block_pointers;
 238         size_t           block_pointers_alloc;
 239         size_t           block_pointers_size;
 240         size_t           block_pointers_avail;
 241         size_t           block_off;
 242         uint32_t         block_avail;
 243
 244         z_stream         stream;
 245         int              stream_valid;
 246 };
 247 #else
 248 struct zisofs {
 249         /* Set 1 if this file compressed by paged zlib */
 250         int              pz;
 251 };
 252 #endif
 253
 254 struct content {
 255         uint64_t         offset;/* Offset on disk.              */
 256         uint64_t         size;  /* File size in bytes.          */
 257         struct content  *next;
 258 };
 259
 260 /* In-memory storage for a directory record. */
 261 struct file_info {
 262         struct file_info        *use_next;
 263         struct file_info        *parent;
 264         struct file_info        *next;
 265         struct file_info        *re_next;
 266         int              subdirs;
 267         uint64_t         key;           /* Heap Key.                    */
 268         uint64_t         offset;        /* Offset on disk.              */
 269         uint64_t         size;          /* File size in bytes.          */
 270         uint32_t         ce_offset;     /* Offset of CE.                */
 271         uint32_t         ce_size;       /* Size of CE.                  */
 272         char             rr_moved;      /* Flag to rr_moved.            */
 273         char             rr_moved_has_re_only;
 274         char             re;            /* Having RRIP "RE" extension.  */
 275         char             re_descendant;
 276         uint64_t         cl_offset;     /* Having RRIP "CL" extension.  */
 277         int              birthtime_is_set;
 278         time_t           birthtime;     /* File created time.           */
 279         time_t           mtime;         /* File last modified time.     */
 280         time_t           atime;         /* File last accessed time.     */
 281         time_t           ctime;         /* File attribute change time.  */
 282         uint64_t         rdev;          /* Device number.               */
 283         mode_t           mode;
 284         uid_t            uid;
 285         gid_t            gid;
 286         int64_t          number;
 287         int              nlinks;
 288         struct archive_string name; /* Pathname */
 289         unsigned char   *utf16be_name;
 290         size_t           utf16be_bytes;
 291         char             name_continues; /* Non-zero if name continues */
 292         struct archive_string symlink;
 293         char             symlink_continues; /* Non-zero if link continues */
 294         /* Set 1 if this file compressed by paged zlib(zisofs) */
 295         int              pz;
 296         int              pz_log2_bs; /* Log2 of block size */
 297         uint64_t         pz_uncompressed_size;
 298         /* Set 1 if this file is multi extent. */
 299         int              multi_extent;
 300         struct {
 301                 struct content  *first;
 302                 struct content  **last;
 303         } contents;
 304         struct {
 305                 struct file_info        *first;
 306                 struct file_info        **last;
 307         } rede_files;
 308 };
 309
 310 struct heap_queue {
 311         struct file_info **files;
 312         int              allocated;
 313         int              used;
 314 };
 315
 316 struct iso9660 {
 317         int     magic;
 318 #define ISO9660_MAGIC   0x96609660
 319
 320         int opt_support_joliet;
 321         int opt_support_rockridge;
 322
 323         struct archive_string pathname;
 324         char    seenRockridge;  /* Set true if RR extensions are used. */
 325         char    seenSUSP;       /* Set true if SUSP is being used. */
 326         char    seenJoliet;
 327
 328         unsigned char   suspOffset;
 329         struct file_info *rr_moved;
 330         struct read_ce_queue {
 331                 struct read_ce_req {
 332                         uint64_t         offset;/* Offset of CE on disk. */
 333                         struct file_info *file;
 334                 }               *reqs;
 335                 int              cnt;
 336                 int              allocated;
 337         }       read_ce_req;
 338
 339         int64_t         previous_number;
 340         struct archive_string previous_pathname;
 341
 342         struct file_info                *use_files;
 343         struct heap_queue                pending_files;
 344         struct {
 345                 struct file_info        *first;
 346                 struct file_info        **last;
 347         }       cache_files;
 348         struct {
 349                 struct file_info        *first;
 350                 struct file_info        **last;
 351         }       re_files;
 352
 353         uint64_t current_position;
 354         ssize_t logical_block_size;
 355         uint64_t volume_size; /* Total size of volume in bytes. */
 356         int32_t  volume_block;/* Total size of volume in logical blocks. */
 357
 358         struct vd {
 359                 int             location;       /* Location of Extent.  */
 360                 uint32_t        size;
 361         } primary, joliet;
 362
 363         int64_t entry_sparse_offset;
 364         int64_t entry_bytes_remaining;
 365         size_t  entry_bytes_unconsumed;
 366         struct zisofs    entry_zisofs;
 367         struct content  *entry_content;
 368         struct archive_string_conv *sconv_utf16be;
 369         /*
 370          * Buffers for a full pathname in UTF-16BE in Joliet extensions.
 371          */
 372 #define UTF16_NAME_MAX  1024
 373         unsigned char *utf16be_path;
 374         size_t           utf16be_path_len;
 375         unsigned char *utf16be_previous_path;
 376         size_t           utf16be_previous_path_len;
 377         /* Null buffer used in bidder to improve its performance. */
 378         unsigned char    null[2048];
 379 };
 380
 381 static int      archive_read_format_iso9660_bid(struct archive_read *, int);
 382 static int      archive_read_format_iso9660_options(struct archive_read *,
 383                     const char *, const char *);
 384 static int      archive_read_format_iso9660_cleanup(struct archive_read *);
 385 static int      archive_read_format_iso9660_read_data(struct archive_read *,
 386                     const void **, size_t *, int64_t *);
 387 static int      archive_read_format_iso9660_read_data_skip(struct archive_read *);
 388 static int      archive_read_format_iso9660_read_header(struct archive_read *,
 389                     struct archive_entry *);
 390 static const char *build_pathname(struct archive_string *, struct file_info *, int);
 391 static int      build_pathname_utf16be(unsigned char *, size_t, size_t *,
 392                     struct file_info *);
 393 #if DEBUG
 394 static void     dump_isodirrec(FILE *, const unsigned char *isodirrec);
 395 #endif
 396 static time_t   time_from_tm(struct tm *);
 397 static time_t   isodate17(const unsigned char *);
 398 static time_t   isodate7(const unsigned char *);
 399 static int      isBootRecord(struct iso9660 *, const unsigned char *);
 400 static int      isVolumePartition(struct iso9660 *, const unsigned char *);
 401 static int      isVDSetTerminator(struct iso9660 *, const unsigned char *);
 402 static int      isJolietSVD(struct iso9660 *, const unsigned char *);
 403 static int      isSVD(struct iso9660 *, const unsigned char *);
 404 static int      isEVD(struct iso9660 *, const unsigned char *);
 405 static int      isPVD(struct iso9660 *, const unsigned char *);
 406 static int      next_cache_entry(struct archive_read *, struct iso9660 *,
 407                     struct file_info **);
 408 static int      next_entry_seek(struct archive_read *, struct iso9660 *,
 409                     struct file_info **);
 410 static struct file_info *
 411                 parse_file_info(struct archive_read *a,
 412                     struct file_info *parent, const unsigned char *isodirrec,
 413                     size_t reclen);
 414 static int      parse_rockridge(struct archive_read *a,
 415                     struct file_info *file, const unsigned char *start,
 416                     const unsigned char *end);
 417 static int      register_CE(struct archive_read *a, int32_t location,
 418                     struct file_info *file);
 419 static int      read_CE(struct archive_read *a, struct iso9660 *iso9660);
 420 static void     parse_rockridge_NM1(struct file_info *,
 421                     const unsigned char *, int);
 422 static void     parse_rockridge_SL1(struct file_info *,
 423                     const unsigned char *, int);
 424 static void     parse_rockridge_TF1(struct file_info *,
 425                     const unsigned char *, int);
 426 static void     parse_rockridge_ZF1(struct file_info *,
 427                     const unsigned char *, int);
 428 static void     register_file(struct iso9660 *, struct file_info *);
 429 static void     release_files(struct iso9660 *);
 430 static unsigned toi(const void *p, int n);
 431 static inline void re_add_entry(struct iso9660 *, struct file_info *);
 432 static inline struct file_info * re_get_entry(struct iso9660 *);
 433 static inline int rede_add_entry(struct file_info *);
 434 static inline struct file_info * rede_get_entry(struct file_info *);
 435 static inline void cache_add_entry(struct iso9660 *iso9660,
 436                     struct file_info *file);
 437 static inline struct file_info *cache_get_entry(struct iso9660 *iso9660);
 438 static int      heap_add_entry(struct archive_read *a, struct heap_queue *heap,
 439                     struct file_info *file, uint64_t key);
 440 static struct file_info *heap_get_entry(struct heap_queue *heap);
 441
 442 #define add_entry(arch, iso9660, file)  \
 443         heap_add_entry(arch, &((iso9660)->pending_files), file, file->offset)
 444 #define next_entry(iso9660)             \
 445         heap_get_entry(&((iso9660)->pending_files))
 446
 447 int
 448 archive_read_support_format_iso9660(struct archive *_a)
 449 {
 450         struct archive_read *a = (struct archive_read *)_a;
 451         struct iso9660 *iso9660;
 452         int r;
 453
 454         archive_check_magic(_a, ARCHIVE_READ_MAGIC,
 455             ARCHIVE_STATE_NEW, "archive_read_support_format_iso9660");
 456
 457         iso9660 = (struct iso9660 *)calloc(1, sizeof(*iso9660));
 458         if (iso9660 == NULL) {
 459                 archive_set_error(&a->archive, ENOMEM,
 460                     "Can't allocate iso9660 data");
 461                 return (ARCHIVE_FATAL);
 462         }
 463         iso9660->magic = ISO9660_MAGIC;
 464         iso9660->cache_files.first = NULL;
 465         iso9660->cache_files.last = &(iso9660->cache_files.first);
 466         iso9660->re_files.first = NULL;
 467         iso9660->re_files.last = &(iso9660->re_files.first);
 468         /* Enable to support Joliet extensions by default.      */
 469         iso9660->opt_support_joliet = 1;
 470         /* Enable to support Rock Ridge extensions by default.  */
 471         iso9660->opt_support_rockridge = 1;
 472
 473         r = __archive_read_register_format(a,
 474             iso9660,
 475             "iso9660",
 476             archive_read_format_iso9660_bid,
 477             archive_read_format_iso9660_options,
 478             archive_read_format_iso9660_read_header,
 479             archive_read_format_iso9660_read_data,
 480             archive_read_format_iso9660_read_data_skip,
 481             NULL,
 482             archive_read_format_iso9660_cleanup,
 483             NULL,
 484             NULL);
 485
 486         if (r != ARCHIVE_OK) {
 487                 free(iso9660);
 488                 return (r);
 489         }
 490         return (ARCHIVE_OK);
 491 }
 492
 493
 494 static int
 495 archive_read_format_iso9660_bid(struct archive_read *a, int best_bid)
 496 {
 497         struct iso9660 *iso9660;
 498         ssize_t bytes_read;
 499         const unsigned char *p;
 500         int seenTerminator;
 501
 502         /* If there's already a better bid than we can ever
 503            make, don't bother testing. */
 504         if (best_bid > 48)
 505                 return (-1);
 506
 507         iso9660 = (struct iso9660 *)(a->format->data);
 508
 509         /*
 510          * Skip the first 32k (reserved area) and get the first
 511          * 8 sectors of the volume descriptor table.  Of course,
 512          * if the I/O layer gives us more, we'll take it.
 513          */
 514 #define RESERVED_AREA   (SYSTEM_AREA_BLOCK * LOGICAL_BLOCK_SIZE)
 515         p = __archive_read_ahead(a,
 516             RESERVED_AREA + 8 * LOGICAL_BLOCK_SIZE,
 517             &bytes_read);
 518         if (p == NULL)
 519             return (-1);
 520
 521         /* Skip the reserved area. */
 522         bytes_read -= RESERVED_AREA;
 523         p += RESERVED_AREA;
 524
 525         /* Check each volume descriptor. */
 526         seenTerminator = 0;
 527         for (; bytes_read > LOGICAL_BLOCK_SIZE;
 528             bytes_read -= LOGICAL_BLOCK_SIZE, p += LOGICAL_BLOCK_SIZE) {
 529                 /* Do not handle undefined Volume Descriptor Type. */
 530                 if (p[0] >= 4 && p[0] <= 254)
 531                         return (0);
 532                 /* Standard Identifier must be "CD001" */
 533                 if (memcmp(p + 1, "CD001", 5) != 0)
 534                         return (0);
 535                 if (isPVD(iso9660, p))
 536                         continue;
 537                 if (!iso9660->joliet.location) {
 538                         if (isJolietSVD(iso9660, p))
 539                                 continue;
 540                 }
 541                 if (isBootRecord(iso9660, p))
 542                         continue;
 543                 if (isEVD(iso9660, p))
 544                         continue;
 545                 if (isSVD(iso9660, p))
 546                         continue;
 547                 if (isVolumePartition(iso9660, p))
 548                         continue;
 549                 if (isVDSetTerminator(iso9660, p)) {
 550                         seenTerminator = 1;
 551                         break;
 552                 }
 553                 return (0);
 554         }
 555         /*
 556          * ISO 9660 format must have Primary Volume Descriptor and
 557          * Volume Descriptor Set Terminator.
 558          */
 559         if (seenTerminator && iso9660->primary.location > 16)
 560                 return (48);
 561
 562         /* We didn't find a valid PVD; return a bid of zero. */
 563         return (0);
 564 }
 565
 566 static int
 567 archive_read_format_iso9660_options(struct archive_read *a,
 568                 const char *key, const char *val)
 569 {
 570         struct iso9660 *iso9660;
 571
 572         iso9660 = (struct iso9660 *)(a->format->data);
 573
 574         if (strcmp(key, "joliet") == 0) {
 575                 if (val == NULL || strcmp(val, "off") == 0 ||
 576                                 strcmp(val, "ignore") == 0 ||
 577                                 strcmp(val, "disable") == 0 ||
 578                                 strcmp(val, "0") == 0)
 579                         iso9660->opt_support_joliet = 0;
 580                 else
 581                         iso9660->opt_support_joliet = 1;
 582                 return (ARCHIVE_OK);
 583         }
 584         if (strcmp(key, "rockridge") == 0 ||
 585             strcmp(key, "Rockridge") == 0) {
 586                 iso9660->opt_support_rockridge = val != NULL;
 587                 return (ARCHIVE_OK);
 588         }
 589
 590         /* Note: The "warn" return is just to inform the options
 591          * supervisor that we didn't handle it.  It will generate
 592          * a suitable error if no one used this option. */
 593         return (ARCHIVE_WARN);
 594 }
 595
 596 static int
 597 isNull(struct iso9660 *iso9660, const unsigned char *h, unsigned offset,
 598 unsigned bytes)
 599 {
 600
 601         while (bytes >= sizeof(iso9660->null)) {
 602                 if (!memcmp(iso9660->null, h + offset, sizeof(iso9660->null)))
 603                         return (0);
 604                 offset += sizeof(iso9660->null);
 605                 bytes -= sizeof(iso9660->null);
 606         }
 607         if (bytes)
 608                 return memcmp(iso9660->null, h + offset, bytes) == 0;
 609         else
 610                 return (1);
 611 }
 612
 613 static int
 614 isBootRecord(struct iso9660 *iso9660, const unsigned char *h)
 615 {
 616         (void)iso9660; /* UNUSED */
 617
 618         /* Type of the Volume Descriptor Boot Record must be 0. */
 619         if (h[0] != 0)
 620                 return (0);
 621
 622         /* Volume Descriptor Version must be 1. */
 623         if (h[6] != 1)
 624                 return (0);
 625
 626         return (1);
 627 }
 628
 629 static int
 630 isVolumePartition(struct iso9660 *iso9660, const unsigned char *h)
 631 {
 632         int32_t location;
 633
 634         /* Type of the Volume Partition Descriptor must be 3. */
 635         if (h[0] != 3)
 636                 return (0);
 637
 638         /* Volume Descriptor Version must be 1. */
 639         if (h[6] != 1)
 640                 return (0);
 641         /* Unused Field */
 642         if (h[7] != 0)
 643                 return (0);
 644
 645         location = archive_le32dec(h + 72);
 646         if (location <= SYSTEM_AREA_BLOCK ||
 647             location >= iso9660->volume_block)
 648                 return (0);
 649         if ((uint32_t)location != archive_be32dec(h + 76))
 650                 return (0);
 651
 652         return (1);
 653 }
 654
 655 static int
 656 isVDSetTerminator(struct iso9660 *iso9660, const unsigned char *h)
 657 {
 658         (void)iso9660; /* UNUSED */
 659
 660         /* Type of the Volume Descriptor Set Terminator must be 255. */
 661         if (h[0] != 255)
 662                 return (0);
 663
 664         /* Volume Descriptor Version must be 1. */
 665         if (h[6] != 1)
 666                 return (0);
 667
 668         /* Reserved field must be 0. */
 669         if (!isNull(iso9660, h, 7, 2048-7))
 670                 return (0);
 671
 672         return (1);
 673 }
 674
 675 static int
 676 isJolietSVD(struct iso9660 *iso9660, const unsigned char *h)
 677 {
 678         const unsigned char *p;
 679         ssize_t logical_block_size;
 680         int32_t volume_block;
 681
 682         /* Check if current sector is a kind of Supplementary Volume
 683          * Descriptor. */
 684         if (!isSVD(iso9660, h))
 685                 return (0);
 686
 687         /* FIXME: do more validations according to joliet spec. */
 688
 689         /* check if this SVD contains joliet extension! */
 690         p = h + SVD_escape_sequences_offset;
 691         /* N.B. Joliet spec says p[1] == '\\', but.... */
 692         if (p[0] == '%' && p[1] == '/') {
 693                 int level = 0;
 694
 695                 if (p[2] == '@')
 696                         level = 1;
 697                 else if (p[2] == 'C')
 698                         level = 2;
 699                 else if (p[2] == 'E')
 700                         level = 3;
 701                 else /* not joliet */
 702                         return (0);
 703
 704                 iso9660->seenJoliet = level;
 705
 706         } else /* not joliet */
 707                 return (0);
 708
 709         logical_block_size =
 710             archive_le16dec(h + SVD_logical_block_size_offset);
 711         volume_block = archive_le32dec(h + SVD_volume_space_size_offset);
 712
 713         iso9660->logical_block_size = logical_block_size;
 714         iso9660->volume_block = volume_block;
 715         iso9660->volume_size = logical_block_size * (uint64_t)volume_block;
 716         /* Read Root Directory Record in Volume Descriptor. */
 717         p = h + SVD_root_directory_record_offset;
 718         iso9660->joliet.location = archive_le32dec(p + DR_extent_offset);
 719         iso9660->joliet.size = archive_le32dec(p + DR_size_offset);
 720
 721         return (48);
 722 }
 723
 724 static int
 725 isSVD(struct iso9660 *iso9660, const unsigned char *h)
 726 {
 727         const unsigned char *p;
 728         ssize_t logical_block_size;
 729         int32_t volume_block;
 730         int32_t location;
 731
 732         (void)iso9660; /* UNUSED */
 733
 734         /* Type 2 means it's a SVD. */
 735         if (h[SVD_type_offset] != 2)
 736                 return (0);
 737
 738         /* Reserved field must be 0. */
 739         if (!isNull(iso9660, h, SVD_reserved1_offset, SVD_reserved1_size))
 740                 return (0);
 741         if (!isNull(iso9660, h, SVD_reserved2_offset, SVD_reserved2_size))
 742                 return (0);
 743         if (!isNull(iso9660, h, SVD_reserved3_offset, SVD_reserved3_size))
 744                 return (0);
 745
 746         /* File structure version must be 1 for ISO9660/ECMA119. */
 747         if (h[SVD_file_structure_version_offset] != 1)
 748                 return (0);
 749
 750         logical_block_size =
 751             archive_le16dec(h + SVD_logical_block_size_offset);
 752         if (logical_block_size <= 0)
 753                 return (0);
 754
 755         volume_block = archive_le32dec(h + SVD_volume_space_size_offset);
 756         if (volume_block <= SYSTEM_AREA_BLOCK+4)
 757                 return (0);
 758
 759         /* Location of Occurrence of Type L Path Table must be
 760          * available location,
 761          * >= SYSTEM_AREA_BLOCK(16) + 2 and < Volume Space Size. */
 762         location = archive_le32dec(h+SVD_type_L_path_table_offset);
 763         if (location < SYSTEM_AREA_BLOCK+2 || location >= volume_block)
 764                 return (0);
 765
 766         /* The Type M Path Table must be at a valid location (WinISO
 767          * and probably other programs omit this, so we allow zero)
 768          *
 769          * >= SYSTEM_AREA_BLOCK(16) + 2 and < Volume Space Size. */
 770         location = archive_be32dec(h+SVD_type_M_path_table_offset);
 771         if ((location > 0 && location < SYSTEM_AREA_BLOCK+2)
 772             || location >= volume_block)
 773                 return (0);
 774
 775         /* Read Root Directory Record in Volume Descriptor. */
 776         p = h + SVD_root_directory_record_offset;
 777         if (p[DR_length_offset] != 34)
 778                 return (0);
 779
 780         return (48);
 781 }
 782
 783 static int
 784 isEVD(struct iso9660 *iso9660, const unsigned char *h)
 785 {
 786         const unsigned char *p;
 787         ssize_t logical_block_size;
 788         int32_t volume_block;
 789         int32_t location;
 790
 791         (void)iso9660; /* UNUSED */
 792
 793         /* Type of the Enhanced Volume Descriptor must be 2. */
 794         if (h[PVD_type_offset] != 2)
 795                 return (0);
 796
 797         /* EVD version must be 2. */
 798         if (h[PVD_version_offset] != 2)
 799                 return (0);
 800
 801         /* Reserved field must be 0. */
 802         if (h[PVD_reserved1_offset] != 0)
 803                 return (0);
 804
 805         /* Reserved field must be 0. */
 806         if (!isNull(iso9660, h, PVD_reserved2_offset, PVD_reserved2_size))
 807                 return (0);
 808
 809         /* Reserved field must be 0. */
 810         if (!isNull(iso9660, h, PVD_reserved3_offset, PVD_reserved3_size))
 811                 return (0);
 812
 813         /* Logical block size must be > 0. */
 814         /* I've looked at Ecma 119 and can't find any stronger
 815          * restriction on this field. */
 816         logical_block_size =
 817             archive_le16dec(h + PVD_logical_block_size_offset);
 818         if (logical_block_size <= 0)
 819                 return (0);
 820
 821         volume_block =
 822             archive_le32dec(h + PVD_volume_space_size_offset);
 823         if (volume_block <= SYSTEM_AREA_BLOCK+4)
 824                 return (0);
 825
 826         /* File structure version must be 2 for ISO9660:1999. */
 827         if (h[PVD_file_structure_version_offset] != 2)
 828                 return (0);
 829
 830         /* Location of Occurrence of Type L Path Table must be
 831          * available location,
 832          * >= SYSTEM_AREA_BLOCK(16) + 2 and < Volume Space Size. */
 833         location = archive_le32dec(h+PVD_type_1_path_table_offset);
 834         if (location < SYSTEM_AREA_BLOCK+2 || location >= volume_block)
 835                 return (0);
 836
 837         /* Location of Occurrence of Type M Path Table must be
 838          * available location,
 839          * >= SYSTEM_AREA_BLOCK(16) + 2 and < Volume Space Size. */
 840         location = archive_be32dec(h+PVD_type_m_path_table_offset);
 841         if ((location > 0 && location < SYSTEM_AREA_BLOCK+2)
 842             || location >= volume_block)
 843                 return (0);
 844
 845         /* Reserved field must be 0. */
 846         if (!isNull(iso9660, h, PVD_reserved4_offset, PVD_reserved4_size))
 847                 return (0);
 848
 849         /* Reserved field must be 0. */
 850         if (!isNull(iso9660, h, PVD_reserved5_offset, PVD_reserved5_size))
 851                 return (0);
 852
 853         /* Read Root Directory Record in Volume Descriptor. */
 854         p = h + PVD_root_directory_record_offset;
 855         if (p[DR_length_offset] != 34)
 856                 return (0);
 857
 858         return (48);
 859 }
 860
 861 static int
 862 isPVD(struct iso9660 *iso9660, const unsigned char *h)
 863 {
 864         const unsigned char *p;
 865         ssize_t logical_block_size;
 866         int32_t volume_block;
 867         int32_t location;
 868         int i;
 869
 870         /* Type of the Primary Volume Descriptor must be 1. */
 871         if (h[PVD_type_offset] != 1)
 872                 return (0);
 873
 874         /* PVD version must be 1. */
 875         if (h[PVD_version_offset] != 1)
 876                 return (0);
 877
 878         /* Reserved field must be 0. */
 879         if (h[PVD_reserved1_offset] != 0)
 880                 return (0);
 881
 882         /* Reserved field must be 0. */
 883         if (!isNull(iso9660, h, PVD_reserved2_offset, PVD_reserved2_size))
 884                 return (0);
 885
 886         /* Reserved field must be 0. */
 887         if (!isNull(iso9660, h, PVD_reserved3_offset, PVD_reserved3_size))
 888                 return (0);
 889
 890         /* Logical block size must be > 0. */
 891         /* I've looked at Ecma 119 and can't find any stronger
 892          * restriction on this field. */
 893         logical_block_size =
 894             archive_le16dec(h + PVD_logical_block_size_offset);
 895         if (logical_block_size <= 0)
 896                 return (0);
 897
 898         volume_block = archive_le32dec(h + PVD_volume_space_size_offset);
 899         if (volume_block <= SYSTEM_AREA_BLOCK+4)
 900                 return (0);
 901
 902         /* File structure version must be 1 for ISO9660/ECMA119. */
 903         if (h[PVD_file_structure_version_offset] != 1)
 904                 return (0);
 905
 906         /* Location of Occurrence of Type L Path Table must be
 907          * available location,
 908          * > SYSTEM_AREA_BLOCK(16) + 2 and < Volume Space Size. */
 909         location = archive_le32dec(h+PVD_type_1_path_table_offset);
 910         if (location < SYSTEM_AREA_BLOCK+2 || location >= volume_block)
 911                 return (0);
 912
 913         /* The Type M Path Table must also be at a valid location
 914          * (although ECMA 119 requires a Type M Path Table, WinISO and
 915          * probably other programs omit it, so we permit a zero here)
 916          *
 917          * >= SYSTEM_AREA_BLOCK(16) + 2 and < Volume Space Size. */
 918         location = archive_be32dec(h+PVD_type_m_path_table_offset);
 919         if ((location > 0 && location < SYSTEM_AREA_BLOCK+2)
 920             || location >= volume_block)
 921                 return (0);
 922
 923         /* Reserved field must be 0. */
 924         /* But accept NetBSD/FreeBSD "makefs" images with 0x20 here. */
 925         for (i = 0; i < PVD_reserved4_size; ++i)
 926                 if (h[PVD_reserved4_offset + i] != 0
 927                     && h[PVD_reserved4_offset + i] != 0x20)
 928                         return (0);
 929
 930         /* Reserved field must be 0. */
 931         if (!isNull(iso9660, h, PVD_reserved5_offset, PVD_reserved5_size))
 932                 return (0);
 933
 934         /* XXX TODO: Check other values for sanity; reject more
 935          * malformed PVDs. XXX */
 936
 937         /* Read Root Directory Record in Volume Descriptor. */
 938         p = h + PVD_root_directory_record_offset;
 939         if (p[DR_length_offset] != 34)
 940                 return (0);
 941
 942         if (!iso9660->primary.location) {
 943                 iso9660->logical_block_size = logical_block_size;
 944                 iso9660->volume_block = volume_block;
 945                 iso9660->volume_size =
 946                     logical_block_size * (uint64_t)volume_block;
 947                 iso9660->primary.location =
 948                     archive_le32dec(p + DR_extent_offset);
 949                 iso9660->primary.size = archive_le32dec(p + DR_size_offset);
 950         }
 951
 952         return (48);
 953 }
 954
 955 static int
 956 read_children(struct archive_read *a, struct file_info *parent)
 957 {
 958         struct iso9660 *iso9660;
 959         const unsigned char *b, *p;
 960         struct file_info *multi;
 961         size_t step, skip_size;
 962
 963         iso9660 = (struct iso9660 *)(a->format->data);
 964         /* flush any remaining bytes from the last round to ensure
 965          * we're positioned */
 966         if (iso9660->entry_bytes_unconsumed) {
 967                 __archive_read_consume(a, iso9660->entry_bytes_unconsumed);
 968                 iso9660->entry_bytes_unconsumed = 0;
 969         }
 970         if (iso9660->current_position > parent->offset) {
 971                 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
 972                     "Ignoring out-of-order directory (%s) %jd > %jd",
 973                     parent->name.s,
 974                     (intmax_t)iso9660->current_position,
 975                     (intmax_t)parent->offset);
 976                 return (ARCHIVE_WARN);
 977         }
 978         if (parent->offset + parent->size > iso9660->volume_size) {
 979                 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
 980                     "Directory is beyond end-of-media: %s",
 981                     parent->name.s);
 982                 return (ARCHIVE_WARN);
 983         }
 984         if (iso9660->current_position < parent->offset) {
 985                 int64_t skipsize;
 986
 987                 skipsize = parent->offset - iso9660->current_position;
 988                 skipsize = __archive_read_consume(a, skipsize);
 989                 if (skipsize < 0)
 990                         return ((int)skipsize);
 991                 iso9660->current_position = parent->offset;
 992         }
 993
 994         step = (size_t)(((parent->size + iso9660->logical_block_size -1) /
 995             iso9660->logical_block_size) * iso9660->logical_block_size);
 996         b = __archive_read_ahead(a, step, NULL);
 997         if (b == NULL) {
 998                 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
 999                     "Failed to read full block when scanning "
1000                     "ISO9660 directory list");
1001                 return (ARCHIVE_FATAL);
1002         }
1003         iso9660->current_position += step;
1004         multi = NULL;
1005         skip_size = step;
1006         while (step) {
1007                 p = b;
1008                 b += iso9660->logical_block_size;
1009                 step -= iso9660->logical_block_size;
1010                 for (; *p != 0 && p < b && p + *p <= b; p += *p) {
1011                         struct file_info *child;
1012
1013                         /* N.B.: these special directory identifiers
1014                          * are 8 bit "values" even on a
1015                          * Joliet CD with UCS-2 (16bit) encoding.
1016                          */
1017
1018                         /* Skip '.' entry. */
1019                         if (*(p + DR_name_len_offset) == 1
1020                             && *(p + DR_name_offset) == '\0')
1021                                 continue;
1022                         /* Skip '..' entry. */
1023                         if (*(p + DR_name_len_offset) == 1
1024                             && *(p + DR_name_offset) == '\001')
1025                                 continue;
1026                         child = parse_file_info(a, parent, p, b - p);
1027                         if (child == NULL) {
1028                                 __archive_read_consume(a, skip_size);
1029                                 return (ARCHIVE_FATAL);
1030                         }
1031                         if (child->cl_offset == 0 &&
1032                             (child->multi_extent || multi != NULL)) {
1033                                 struct content *con;
1034
1035                                 if (multi == NULL) {
1036                                         multi = child;
1037                                         multi->contents.first = NULL;
1038                                         multi->contents.last =
1039                                             &(multi->contents.first);
1040                                 }
1041                                 con = malloc(sizeof(struct content));
1042                                 if (con == NULL) {
1043                                         archive_set_error(
1044                                             &a->archive, ENOMEM,
1045                                             "No memory for multi extent");
1046                                         __archive_read_consume(a, skip_size);
1047                                         return (ARCHIVE_FATAL);
1048                                 }
1049                                 con->offset = child->offset;
1050                                 con->size = child->size;
1051                                 con->next = NULL;
1052                                 *multi->contents.last = con;
1053                                 multi->contents.last = &(con->next);
1054                                 if (multi == child) {
1055                                         if (add_entry(a, iso9660, child)
1056                                             != ARCHIVE_OK)
1057                                                 return (ARCHIVE_FATAL);
1058                                 } else {
1059                                         multi->size += child->size;
1060                                         if (!child->multi_extent)
1061                                                 multi = NULL;
1062                                 }
1063                         } else
1064                                 if (add_entry(a, iso9660, child) != ARCHIVE_OK)
1065                                         return (ARCHIVE_FATAL);
1066                 }
1067         }
1068
1069         __archive_read_consume(a, skip_size);
1070
1071         /* Read data which recorded by RRIP "CE" extension. */
1072         if (read_CE(a, iso9660) != ARCHIVE_OK)
1073                 return (ARCHIVE_FATAL);
1074
1075         return (ARCHIVE_OK);
1076 }
1077
1078 static int
1079 choose_volume(struct archive_read *a, struct iso9660 *iso9660)
1080 {
1081         struct file_info *file;
1082         int64_t skipsize;
1083         struct vd *vd;
1084         const void *block;
1085         char seenJoliet;
1086
1087         vd = &(iso9660->primary);
1088         if (!iso9660->opt_support_joliet)
1089                 iso9660->seenJoliet = 0;
1090         if (iso9660->seenJoliet &&
1091                 vd->location > iso9660->joliet.location)
1092                 /* This condition is unlikely; by way of caution. */
1093                 vd = &(iso9660->joliet);
1094
1095         skipsize = LOGICAL_BLOCK_SIZE * (int64_t)vd->location;
1096         skipsize = __archive_read_consume(a, skipsize);
1097         if (skipsize < 0)
1098                 return ((int)skipsize);
1099         iso9660->current_position = skipsize;
1100
1101         block = __archive_read_ahead(a, vd->size, NULL);
1102         if (block == NULL) {
1103                 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
1104                     "Failed to read full block when scanning "
1105                     "ISO9660 directory list");
1106                 return (ARCHIVE_FATAL);
1107         }
1108
1109         /*
1110          * While reading Root Directory, flag seenJoliet must be zero to
1111          * avoid converting special name 0x00(Current Directory) and
1112          * next byte to UCS2.
1113          */
1114         seenJoliet = iso9660->seenJoliet;/* Save flag. */
1115         iso9660->seenJoliet = 0;
1116         file = parse_file_info(a, NULL, block, vd->size);
1117         if (file == NULL)
1118                 return (ARCHIVE_FATAL);
1119         iso9660->seenJoliet = seenJoliet;
1120
1121         /*
1122          * If the iso image has both RockRidge and Joliet, we preferentially
1123          * use RockRidge Extensions rather than Joliet ones.
1124          */
1125         if (vd == &(iso9660->primary) && iso9660->seenRockridge
1126             && iso9660->seenJoliet)
1127                 iso9660->seenJoliet = 0;
1128
1129         if (vd == &(iso9660->primary) && !iso9660->seenRockridge
1130             && iso9660->seenJoliet) {
1131                 /* Switch reading data from primary to joliet. */
1132                 vd = &(iso9660->joliet);
1133                 skipsize = LOGICAL_BLOCK_SIZE * (int64_t)vd->location;
1134                 skipsize -= iso9660->current_position;
1135                 skipsize = __archive_read_consume(a, skipsize);
1136                 if (skipsize < 0)
1137                         return ((int)skipsize);
1138                 iso9660->current_position += skipsize;
1139
1140                 block = __archive_read_ahead(a, vd->size, NULL);
1141                 if (block == NULL) {
1142                         archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
1143                             "Failed to read full block when scanning "
1144                             "ISO9660 directory list");
1145                         return (ARCHIVE_FATAL);
1146                 }
1147                 iso9660->seenJoliet = 0;
1148                 file = parse_file_info(a, NULL, block, vd->size);
1149                 if (file == NULL)
1150                         return (ARCHIVE_FATAL);
1151                 iso9660->seenJoliet = seenJoliet;
1152         }
1153
1154         /* Store the root directory in the pending list. */
1155         if (add_entry(a, iso9660, file) != ARCHIVE_OK)
1156                 return (ARCHIVE_FATAL);
1157         if (iso9660->seenRockridge) {
1158                 a->archive.archive_format = ARCHIVE_FORMAT_ISO9660_ROCKRIDGE;
1159                 a->archive.archive_format_name =
1160                     "ISO9660 with Rockridge extensions";
1161         }
1162
1163         return (ARCHIVE_OK);
1164 }
1165
1166 static int
1167 archive_read_format_iso9660_read_header(struct archive_read *a,
1168     struct archive_entry *entry)
1169 {
1170         struct iso9660 *iso9660;
1171         struct file_info *file;
1172         int r, rd_r = ARCHIVE_OK;
1173
1174         iso9660 = (struct iso9660 *)(a->format->data);
1175
1176         if (!a->archive.archive_format) {
1177                 a->archive.archive_format = ARCHIVE_FORMAT_ISO9660;
1178                 a->archive.archive_format_name = "ISO9660";
1179         }
1180
1181         if (iso9660->current_position == 0) {
1182                 r = choose_volume(a, iso9660);
1183                 if (r != ARCHIVE_OK)
1184                         return (r);
1185         }
1186
1187         file = NULL;/* Eliminate a warning. */
1188         /* Get the next entry that appears after the current offset. */
1189         r = next_entry_seek(a, iso9660, &file);
1190         if (r != ARCHIVE_OK)
1191                 return (r);
1192
1193         if (iso9660->seenJoliet) {
1194                 /*
1195                  * Convert UTF-16BE of a filename to local locale MBS
1196                  * and store the result into a filename field.
1197                  */
1198                 if (iso9660->sconv_utf16be == NULL) {
1199                         iso9660->sconv_utf16be =
1200                             archive_string_conversion_from_charset(
1201                                 &(a->archive), "UTF-16BE", 1);
1202                         if (iso9660->sconv_utf16be == NULL)
1203                                 /* Couldn't allocate memory */
1204                                 return (ARCHIVE_FATAL);
1205                 }
1206                 if (iso9660->utf16be_path == NULL) {
1207                         iso9660->utf16be_path = malloc(UTF16_NAME_MAX);
1208                         if (iso9660->utf16be_path == NULL) {
1209                                 archive_set_error(&a->archive, ENOMEM,
1210                                     "No memory");
1211                                 return (ARCHIVE_FATAL);
1212                         }
1213                 }
1214                 if (iso9660->utf16be_previous_path == NULL) {
1215                         iso9660->utf16be_previous_path = malloc(UTF16_NAME_MAX);
1216                         if (iso9660->utf16be_previous_path == NULL) {
1217                                 archive_set_error(&a->archive, ENOMEM,
1218                                     "No memory");
1219                                 return (ARCHIVE_FATAL);
1220                         }
1221                 }
1222
1223                 iso9660->utf16be_path_len = 0;
1224                 if (build_pathname_utf16be(iso9660->utf16be_path,
1225                     UTF16_NAME_MAX, &(iso9660->utf16be_path_len), file) != 0) {
1226                         archive_set_error(&a->archive,
1227                             ARCHIVE_ERRNO_FILE_FORMAT,
1228                             "Pathname is too long");
1229                         return (ARCHIVE_FATAL);
1230                 }
1231
1232                 r = archive_entry_copy_pathname_l(entry,
1233                     (const char *)iso9660->utf16be_path,
1234                     iso9660->utf16be_path_len,
1235                     iso9660->sconv_utf16be);
1236                 if (r != 0) {
1237                         if (errno == ENOMEM) {
1238                                 archive_set_error(&a->archive, ENOMEM,
1239                                     "No memory for Pathname");
1240                                 return (ARCHIVE_FATAL);
1241                         }
1242                         archive_set_error(&a->archive,
1243                             ARCHIVE_ERRNO_FILE_FORMAT,
1244                             "Pathname cannot be converted "
1245                             "from %s to current locale.",
1246                             archive_string_conversion_charset_name(
1247                               iso9660->sconv_utf16be));
1248
1249                         rd_r = ARCHIVE_WARN;
1250                 }
1251         } else {
1252                 const char *path = build_pathname(&iso9660->pathname, file, 0);
1253                 if (path == NULL) {
1254                         archive_set_error(&a->archive,
1255                             ARCHIVE_ERRNO_FILE_FORMAT,
1256                             "Pathname is too long");
1257                         return (ARCHIVE_FATAL);
1258                 } else {
1259                         archive_string_empty(&iso9660->pathname);
1260                         archive_entry_set_pathname(entry, path);
1261                 }
1262         }
1263
1264         iso9660->entry_bytes_remaining = file->size;
1265         /* Offset for sparse-file-aware clients. */
1266         iso9660->entry_sparse_offset = 0;
1267
1268         if (file->offset + file->size > iso9660->volume_size) {
1269                 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
1270                     "File is beyond end-of-media: %s",
1271                     archive_entry_pathname(entry));
1272                 iso9660->entry_bytes_remaining = 0;
1273                 return (ARCHIVE_WARN);
1274         }
1275
1276         /* Set up the entry structure with information about this entry. */
1277         archive_entry_set_mode(entry, file->mode);
1278         archive_entry_set_uid(entry, file->uid);
1279         archive_entry_set_gid(entry, file->gid);
1280         archive_entry_set_nlink(entry, file->nlinks);
1281         if (file->birthtime_is_set)
1282                 archive_entry_set_birthtime(entry, file->birthtime, 0);
1283         else
1284                 archive_entry_unset_birthtime(entry);
1285         archive_entry_set_mtime(entry, file->mtime, 0);
1286         archive_entry_set_ctime(entry, file->ctime, 0);
1287         archive_entry_set_atime(entry, file->atime, 0);
1288         /* N.B.: Rock Ridge supports 64-bit device numbers. */
1289         archive_entry_set_rdev(entry, (dev_t)file->rdev);
1290         archive_entry_set_size(entry, iso9660->entry_bytes_remaining);
1291         if (file->symlink.s != NULL)
1292                 archive_entry_copy_symlink(entry, file->symlink.s);
1293
1294         /* Note: If the input isn't seekable, we can't rewind to
1295          * return the same body again, so if the next entry refers to
1296          * the same data, we have to return it as a hardlink to the
1297          * original entry. */
1298         if (file->number != -1 &&
1299             file->number == iso9660->previous_number) {
1300                 if (iso9660->seenJoliet) {
1301                         r = archive_entry_copy_hardlink_l(entry,
1302                             (const char *)iso9660->utf16be_previous_path,
1303                             iso9660->utf16be_previous_path_len,
1304                             iso9660->sconv_utf16be);
1305                         if (r != 0) {
1306                                 if (errno == ENOMEM) {
1307                                         archive_set_error(&a->archive, ENOMEM,
1308                                             "No memory for Linkname");
1309                                         return (ARCHIVE_FATAL);
1310                                 }
1311                                 archive_set_error(&a->archive,
1312                                     ARCHIVE_ERRNO_FILE_FORMAT,
1313                                     "Linkname cannot be converted "
1314                                     "from %s to current locale.",
1315                                     archive_string_conversion_charset_name(
1316                                       iso9660->sconv_utf16be));
1317                                 rd_r = ARCHIVE_WARN;
1318                         }
1319                 } else
1320                         archive_entry_set_hardlink(entry,
1321                             iso9660->previous_pathname.s);
1322                 archive_entry_unset_size(entry);
1323                 iso9660->entry_bytes_remaining = 0;
1324                 return (rd_r);
1325         }
1326
1327         if ((file->mode & AE_IFMT) != AE_IFDIR &&
1328             file->offset < iso9660->current_position) {
1329                 int64_t r64;
1330
1331                 r64 = __archive_read_seek(a, file->offset, SEEK_SET);
1332                 if (r64 != (int64_t)file->offset) {
1333                         /* We can't seek backwards to extract it, so issue
1334                          * a warning.  Note that this can only happen if
1335                          * this entry was added to the heap after we passed
1336                          * this offset, that is, only if the directory
1337                          * mentioning this entry is later than the body of
1338                          * the entry. Such layouts are very unusual; most
1339                          * ISO9660 writers lay out and record all directory
1340                          * information first, then store all file bodies. */
1341                         archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
1342                             "Ignoring out-of-order file @%jx (%s) %jd < %jd",
1343                             (intmax_t)file->number,
1344                             iso9660->pathname.s,
1345                             (intmax_t)file->offset,
1346                             (intmax_t)iso9660->current_position);
1347                         iso9660->entry_bytes_remaining = 0;
1348                         return (ARCHIVE_WARN);
1349                 }
1350                 iso9660->current_position = (uint64_t)r64;
1351         }
1352
1353         /* Initialize zisofs variables. */
1354         iso9660->entry_zisofs.pz = file->pz;
1355         if (file->pz) {
1356 #ifdef HAVE_ZLIB_H
1357                 struct zisofs  *zisofs;
1358
1359                 zisofs = &iso9660->entry_zisofs;
1360                 zisofs->initialized = 0;
1361                 zisofs->pz_log2_bs = file->pz_log2_bs;
1362                 zisofs->pz_uncompressed_size = file->pz_uncompressed_size;
1363                 zisofs->pz_offset = 0;
1364                 zisofs->header_avail = 0;
1365                 zisofs->header_passed = 0;
1366                 zisofs->block_pointers_avail = 0;
1367 #endif
1368                 archive_entry_set_size(entry, file->pz_uncompressed_size);
1369         }
1370
1371         iso9660->previous_number = file->number;
1372         if (iso9660->seenJoliet) {
1373                 memcpy(iso9660->utf16be_previous_path, iso9660->utf16be_path,
1374                     iso9660->utf16be_path_len);
1375                 iso9660->utf16be_previous_path_len = iso9660->utf16be_path_len;
1376         } else
1377                 archive_strcpy(
1378                     &iso9660->previous_pathname, iso9660->pathname.s);
1379
1380         /* Reset entry_bytes_remaining if the file is multi extent. */
1381         iso9660->entry_content = file->contents.first;
1382         if (iso9660->entry_content != NULL)
1383                 iso9660->entry_bytes_remaining = iso9660->entry_content->size;
1384
1385         if (archive_entry_filetype(entry) == AE_IFDIR) {
1386                 /* Overwrite nlinks by proper link number which is
1387                  * calculated from number of sub directories. */
1388                 archive_entry_set_nlink(entry, 2 + file->subdirs);
1389                 /* Directory data has been read completely. */
1390                 iso9660->entry_bytes_remaining = 0;
1391         }
1392
1393         if (rd_r != ARCHIVE_OK)
1394                 return (rd_r);
1395         return (ARCHIVE_OK);
1396 }
1397
1398 static int
1399 archive_read_format_iso9660_read_data_skip(struct archive_read *a)
1400 {
1401         /* Because read_next_header always does an explicit skip
1402          * to the next entry, we don't need to do anything here. */
1403         (void)a; /* UNUSED */
1404         return (ARCHIVE_OK);
1405 }
1406
1407 #ifdef HAVE_ZLIB_H
1408
1409 static int
1410 zisofs_read_data(struct archive_read *a,
1411     const void **buff, size_t *size, int64_t *offset)
1412 {
1413         struct iso9660 *iso9660;
1414         struct zisofs  *zisofs;
1415         const unsigned char *p;
1416         size_t avail;
1417         ssize_t bytes_read;
1418         size_t uncompressed_size;
1419         int r;
1420
1421         iso9660 = (struct iso9660 *)(a->format->data);
1422         zisofs = &iso9660->entry_zisofs;
1423
1424         p = __archive_read_ahead(a, 1, &bytes_read);
1425         if (bytes_read <= 0) {
1426                 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
1427                     "Truncated zisofs file body");
1428                 return (ARCHIVE_FATAL);
1429         }
1430         if (bytes_read > iso9660->entry_bytes_remaining)
1431                 bytes_read = (ssize_t)iso9660->entry_bytes_remaining;
1432         avail = bytes_read;
1433         uncompressed_size = 0;
1434
1435         if (!zisofs->initialized) {
1436                 size_t ceil, xsize;
1437
1438                 /* Allocate block pointers buffer. */
1439                 ceil = (size_t)((zisofs->pz_uncompressed_size +
1440                         (((int64_t)1) << zisofs->pz_log2_bs) - 1)
1441                         >> zisofs->pz_log2_bs);
1442                 xsize = (ceil + 1) * 4;
1443                 if (zisofs->block_pointers_alloc < xsize) {
1444                         size_t alloc;
1445
1446                         if (zisofs->block_pointers != NULL)
1447                                 free(zisofs->block_pointers);
1448                         alloc = ((xsize >> 10) + 1) << 10;
1449                         zisofs->block_pointers = malloc(alloc);
1450                         if (zisofs->block_pointers == NULL) {
1451                                 archive_set_error(&a->archive, ENOMEM,
1452                                     "No memory for zisofs decompression");
1453                                 return (ARCHIVE_FATAL);
1454                         }
1455                         zisofs->block_pointers_alloc = alloc;
1456                 }
1457                 zisofs->block_pointers_size = xsize;
1458
1459                 /* Allocate uncompressed data buffer. */
1460                 xsize = (size_t)1UL << zisofs->pz_log2_bs;
1461                 if (zisofs->uncompressed_buffer_size < xsize) {
1462                         if (zisofs->uncompressed_buffer != NULL)
1463                                 free(zisofs->uncompressed_buffer);
1464                         zisofs->uncompressed_buffer = malloc(xsize);
1465                         if (zisofs->uncompressed_buffer == NULL) {
1466                                 archive_set_error(&a->archive, ENOMEM,
1467                                     "No memory for zisofs decompression");
1468                                 return (ARCHIVE_FATAL);
1469                         }
1470                 }
1471                 zisofs->uncompressed_buffer_size = xsize;
1472
1473                 /*
1474                  * Read the file header, and check the magic code of zisofs.
1475                  */
1476                 if (zisofs->header_avail < sizeof(zisofs->header)) {
1477                         xsize = sizeof(zisofs->header) - zisofs->header_avail;
1478                         if (avail < xsize)
1479                                 xsize = avail;
1480                         memcpy(zisofs->header + zisofs->header_avail, p, xsize);
1481                         zisofs->header_avail += xsize;
1482                         avail -= xsize;
1483                         p += xsize;
1484                 }
1485                 if (!zisofs->header_passed &&
1486                     zisofs->header_avail == sizeof(zisofs->header)) {
1487                         int err = 0;
1488
1489                         if (memcmp(zisofs->header, zisofs_magic,
1490                             sizeof(zisofs_magic)) != 0)
1491                                 err = 1;
1492                         if (archive_le32dec(zisofs->header + 8)
1493                             != zisofs->pz_uncompressed_size)
1494                                 err = 1;
1495                         if (zisofs->header[12] != 4)
1496                                 err = 1;
1497                         if (zisofs->header[13] != zisofs->pz_log2_bs)
1498                                 err = 1;
1499                         if (err) {
1500                                 archive_set_error(&a->archive,
1501                                     ARCHIVE_ERRNO_FILE_FORMAT,
1502                                     "Illegal zisofs file body");
1503                                 return (ARCHIVE_FATAL);
1504                         }
1505                         zisofs->header_passed = 1;
1506                 }
1507                 /*
1508                  * Read block pointers.
1509                  */
1510                 if (zisofs->header_passed &&
1511                     zisofs->block_pointers_avail < zisofs->block_pointers_size) {
1512                         xsize = zisofs->block_pointers_size
1513                             - zisofs->block_pointers_avail;
1514                         if (avail < xsize)
1515                                 xsize = avail;
1516                         memcpy(zisofs->block_pointers
1517                             + zisofs->block_pointers_avail, p, xsize);
1518                         zisofs->block_pointers_avail += xsize;
1519                         avail -= xsize;
1520                         p += xsize;
1521                         if (zisofs->block_pointers_avail
1522                             == zisofs->block_pointers_size) {
1523                                 /* We've got all block pointers and initialize
1524                                  * related variables.   */
1525                                 zisofs->block_off = 0;
1526                                 zisofs->block_avail = 0;
1527                                 /* Complete a initialization */
1528                                 zisofs->initialized = 1;
1529                         }
1530                 }
1531
1532                 if (!zisofs->initialized)
1533                         goto next_data; /* We need more data. */
1534         }
1535
1536         /*
1537          * Get block offsets from block pointers.
1538          */
1539         if (zisofs->block_avail == 0) {
1540                 uint32_t bst, bed;
1541
1542                 if (zisofs->block_off + 4 >= zisofs->block_pointers_size) {
1543                         /* There isn't a pair of offsets. */
1544                         archive_set_error(&a->archive,
1545                             ARCHIVE_ERRNO_FILE_FORMAT,
1546                             "Illegal zisofs block pointers");
1547                         return (ARCHIVE_FATAL);
1548                 }
1549                 bst = archive_le32dec(
1550                     zisofs->block_pointers + zisofs->block_off);
1551                 if (bst != zisofs->pz_offset + (bytes_read - avail)) {
1552                         /* TODO: Should we seek offset of current file
1553                          * by bst ? */
1554                         archive_set_error(&a->archive,
1555                             ARCHIVE_ERRNO_FILE_FORMAT,
1556                             "Illegal zisofs block pointers(cannot seek)");
1557                         return (ARCHIVE_FATAL);
1558                 }
1559                 bed = archive_le32dec(
1560                     zisofs->block_pointers + zisofs->block_off + 4);
1561                 if (bed < bst) {
1562                         archive_set_error(&a->archive,
1563                             ARCHIVE_ERRNO_FILE_FORMAT,
1564                             "Illegal zisofs block pointers");
1565                         return (ARCHIVE_FATAL);
1566                 }
1567                 zisofs->block_avail = bed - bst;
1568                 zisofs->block_off += 4;
1569
1570                 /* Initialize compression library for new block. */
1571                 if (zisofs->stream_valid)
1572                         r = inflateReset(&zisofs->stream);
1573                 else
1574                         r = inflateInit(&zisofs->stream);
1575                 if (r != Z_OK) {
1576                         archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
1577                             "Can't initialize zisofs decompression.");
1578                         return (ARCHIVE_FATAL);
1579                 }
1580                 zisofs->stream_valid = 1;
1581                 zisofs->stream.total_in = 0;
1582                 zisofs->stream.total_out = 0;
1583         }
1584
1585         /*
1586          * Make uncompressed data.
1587          */
1588         if (zisofs->block_avail == 0) {
1589                 memset(zisofs->uncompressed_buffer, 0,
1590                     zisofs->uncompressed_buffer_size);
1591                 uncompressed_size = zisofs->uncompressed_buffer_size;
1592         } else {
1593                 zisofs->stream.next_in = (Bytef *)(uintptr_t)(const void *)p;
1594                 if (avail > zisofs->block_avail)
1595                         zisofs->stream.avail_in = zisofs->block_avail;
1596                 else
1597                         zisofs->stream.avail_in = (uInt)avail;
1598                 zisofs->stream.next_out = zisofs->uncompressed_buffer;
1599                 zisofs->stream.avail_out =
1600                     (uInt)zisofs->uncompressed_buffer_size;
1601
1602                 r = inflate(&zisofs->stream, 0);
1603                 switch (r) {
1604                 case Z_OK: /* Decompressor made some progress.*/
1605                 case Z_STREAM_END: /* Found end of stream. */
1606                         break;
1607                 default:
1608                         archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
1609                             "zisofs decompression failed (%d)", r);
1610                         return (ARCHIVE_FATAL);
1611                 }
1612                 uncompressed_size =
1613                     zisofs->uncompressed_buffer_size - zisofs->stream.avail_out;
1614                 avail -= zisofs->stream.next_in - p;
1615                 zisofs->block_avail -= (uint32_t)(zisofs->stream.next_in - p);
1616         }
1617 next_data:
1618         bytes_read -= avail;
1619         *buff = zisofs->uncompressed_buffer;
1620         *size = uncompressed_size;
1621         *offset = iso9660->entry_sparse_offset;
1622         iso9660->entry_sparse_offset += uncompressed_size;
1623         iso9660->entry_bytes_remaining -= bytes_read;
1624         iso9660->current_position += bytes_read;
1625         zisofs->pz_offset += (uint32_t)bytes_read;
1626         iso9660->entry_bytes_unconsumed += bytes_read;
1627
1628         return (ARCHIVE_OK);
1629 }
1630
1631 #else /* HAVE_ZLIB_H */
1632
1633 static int
1634 zisofs_read_data(struct archive_read *a,
1635     const void **buff, size_t *size, int64_t *offset)
1636 {
1637
1638         (void)buff;/* UNUSED */
1639         (void)size;/* UNUSED */
1640         (void)offset;/* UNUSED */
1641         archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
1642             "zisofs is not supported on this platform.");
1643         return (ARCHIVE_FAILED);
1644 }
1645
1646 #endif /* HAVE_ZLIB_H */
1647
1648 static int
1649 archive_read_format_iso9660_read_data(struct archive_read *a,
1650     const void **buff, size_t *size, int64_t *offset)
1651 {
1652         ssize_t bytes_read;
1653         struct iso9660 *iso9660;
1654
1655         iso9660 = (struct iso9660 *)(a->format->data);
1656
1657         if (iso9660->entry_bytes_unconsumed) {
1658                 __archive_read_consume(a, iso9660->entry_bytes_unconsumed);
1659                 iso9660->entry_bytes_unconsumed = 0;
1660         }
1661
1662         if (iso9660->entry_bytes_remaining <= 0) {
1663                 if (iso9660->entry_content != NULL)
1664                         iso9660->entry_content = iso9660->entry_content->next;
1665                 if (iso9660->entry_content == NULL) {
1666                         *buff = NULL;
1667                         *size = 0;
1668                         *offset = iso9660->entry_sparse_offset;
1669                         return (ARCHIVE_EOF);
1670                 }
1671                 /* Seek forward to the start of the entry. */
1672                 if (iso9660->current_position < iso9660->entry_content->offset) {
1673                         int64_t step;
1674
1675                         step = iso9660->entry_content->offset -
1676                             iso9660->current_position;
1677                         step = __archive_read_consume(a, step);
1678                         if (step < 0)
1679                                 return ((int)step);
1680                         iso9660->current_position =
1681                             iso9660->entry_content->offset;
1682                 }
1683                 if (iso9660->entry_content->offset < iso9660->current_position) {
1684                         archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
1685                             "Ignoring out-of-order file (%s) %jd < %jd",
1686                             iso9660->pathname.s,
1687                             (intmax_t)iso9660->entry_content->offset,
1688                             (intmax_t)iso9660->current_position);
1689                         *buff = NULL;
1690                         *size = 0;
1691                         *offset = iso9660->entry_sparse_offset;
1692                         return (ARCHIVE_WARN);
1693                 }
1694                 iso9660->entry_bytes_remaining = iso9660->entry_content->size;
1695         }
1696         if (iso9660->entry_zisofs.pz)
1697                 return (zisofs_read_data(a, buff, size, offset));
1698
1699         *buff = __archive_read_ahead(a, 1, &bytes_read);
1700         if (bytes_read == 0)
1701                 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
1702                     "Truncated input file");
1703         if (*buff == NULL)
1704                 return (ARCHIVE_FATAL);
1705         if (bytes_read > iso9660->entry_bytes_remaining)
1706                 bytes_read = (ssize_t)iso9660->entry_bytes_remaining;
1707         *size = bytes_read;
1708         *offset = iso9660->entry_sparse_offset;
1709         iso9660->entry_sparse_offset += bytes_read;
1710         iso9660->entry_bytes_remaining -= bytes_read;
1711         iso9660->entry_bytes_unconsumed = bytes_read;
1712         iso9660->current_position += bytes_read;
1713         return (ARCHIVE_OK);
1714 }
1715
1716 static int
1717 archive_read_format_iso9660_cleanup(struct archive_read *a)
1718 {
1719         struct iso9660 *iso9660;
1720         int r = ARCHIVE_OK;
1721
1722         iso9660 = (struct iso9660 *)(a->format->data);
1723         release_files(iso9660);
1724         free(iso9660->read_ce_req.reqs);
1725         archive_string_free(&iso9660->pathname);
1726         archive_string_free(&iso9660->previous_pathname);
1727         free(iso9660->pending_files.files);
1728 #ifdef HAVE_ZLIB_H
1729         free(iso9660->entry_zisofs.uncompressed_buffer);
1730         free(iso9660->entry_zisofs.block_pointers);
1731         if (iso9660->entry_zisofs.stream_valid) {
1732                 if (inflateEnd(&iso9660->entry_zisofs.stream) != Z_OK) {
1733                         archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
1734                             "Failed to clean up zlib decompressor");
1735                         r = ARCHIVE_FATAL;
1736                 }
1737         }
1738 #endif
1739         free(iso9660->utf16be_path);
1740         free(iso9660->utf16be_previous_path);
1741         free(iso9660);
1742         (a->format->data) = NULL;
1743         return (r);
1744 }
1745
1746 /*
1747  * This routine parses a single ISO directory record, makes sense
1748  * of any extensions, and stores the result in memory.
1749  */
1750 static struct file_info *
1751 parse_file_info(struct archive_read *a, struct file_info *parent,
1752     const unsigned char *isodirrec, size_t reclen)
1753 {
1754         struct iso9660 *iso9660;
1755         struct file_info *file, *filep;
1756         size_t name_len;
1757         const unsigned char *rr_start, *rr_end;
1758         const unsigned char *p;
1759         size_t dr_len;
1760         uint64_t fsize, offset;
1761         int32_t location;
1762         int flags;
1763
1764         iso9660 = (struct iso9660 *)(a->format->data);
1765
1766         if (reclen != 0)
1767                 dr_len = (size_t)isodirrec[DR_length_offset];
1768         /*
1769          * Sanity check that reclen is not zero and dr_len is greater than
1770          * reclen but at least 34
1771          */
1772         if (reclen == 0 || reclen < dr_len || dr_len < 34) {
1773                 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
1774                         "Invalid length of directory record");
1775                 return (NULL);
1776         }
1777         name_len = (size_t)isodirrec[DR_name_len_offset];
1778         location = archive_le32dec(isodirrec + DR_extent_offset);
1779         fsize = toi(isodirrec + DR_size_offset, DR_size_size);
1780         /* Sanity check that name_len doesn't exceed dr_len. */
1781         if (dr_len - 33 < name_len || name_len == 0) {
1782                 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
1783                     "Invalid length of file identifier");
1784                 return (NULL);
1785         }
1786         /* Sanity check that location doesn't exceed volume block.
1787          * Don't check lower limit of location; it's possibility
1788          * the location has negative value when file type is symbolic
1789          * link or file size is zero. As far as I know latest mkisofs
1790          * do that.
1791          */
1792         if (location > 0 &&
1793             (location + ((fsize + iso9660->logical_block_size -1)
1794                / iso9660->logical_block_size))
1795                         > (uint32_t)iso9660->volume_block) {
1796                 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
1797                     "Invalid location of extent of file");
1798                 return (NULL);
1799         }
1800         /* Sanity check that location doesn't have a negative value
1801          * when the file is not empty. it's too large. */
1802         if (fsize != 0 && location < 0) {
1803                 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
1804                     "Invalid location of extent of file");
1805                 return (NULL);
1806         }
1807
1808         /* Sanity check that this entry does not create a cycle. */
1809         offset = iso9660->logical_block_size * (uint64_t)location;
1810         for (filep = parent; filep != NULL; filep = filep->parent) {
1811                 if (filep->offset == offset) {
1812                         archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
1813                             "Directory structure contains loop");
1814                         return (NULL);
1815                 }
1816         }
1817
1818         /* Create a new file entry and copy data from the ISO dir record. */
1819         file = (struct file_info *)calloc(1, sizeof(*file));
1820         if (file == NULL) {
1821                 archive_set_error(&a->archive, ENOMEM,
1822                     "No memory for file entry");
1823                 return (NULL);
1824         }
1825         file->parent = parent;
1826         file->offset = offset;
1827         file->size = fsize;
1828         file->mtime = isodate7(isodirrec + DR_date_offset);
1829         file->ctime = file->atime = file->mtime;
1830         file->rede_files.first = NULL;
1831         file->rede_files.last = &(file->rede_files.first);
1832
1833         p = isodirrec + DR_name_offset;
1834         /* Rockridge extensions (if any) follow name.  Compute this
1835          * before fidgeting the name_len below. */
1836         rr_start = p + name_len + (name_len & 1 ? 0 : 1);
1837         rr_end = isodirrec + dr_len;
1838
1839         if (iso9660->seenJoliet) {
1840                 /* Joliet names are max 64 chars (128 bytes) according to spec,
1841                  * but genisoimage/mkisofs allows recording longer Joliet
1842                  * names which are 103 UCS2 characters(206 bytes) by their
1843                  * option '-joliet-long'.
1844                  */
1845                 if (name_len > 206)
1846                         name_len = 206;
1847                 name_len &= ~1;
1848
1849                 /* trim trailing first version and dot from filename.
1850                  *
1851                  * Remember we were in UTF-16BE land!
1852                  * SEPARATOR 1 (.) and SEPARATOR 2 (;) are both
1853                  * 16 bits big endian characters on Joliet.
1854                  *
1855                  * TODO: sanitize filename?
1856                  *       Joliet allows any UCS-2 char except:
1857                  *       *, /, :, ;, ? and \.
1858                  */
1859                 /* Chop off trailing ';1' from files. */
1860                 if (name_len > 4 && p[name_len-4] == 0 && p[name_len-3] == ';'
1861                     && p[name_len-2] == 0 && p[name_len-1] == '1')
1862                         name_len -= 4;
1863 #if 0 /* XXX: this somehow manages to strip of single-character file extensions, like '.c'. */
1864                 /* Chop off trailing '.' from filenames. */
1865                 if (name_len > 2 && p[name_len-2] == 0 && p[name_len-1] == '.')
1866                         name_len -= 2;
1867 #endif
1868                 if ((file->utf16be_name = malloc(name_len)) == NULL) {
1869                         archive_set_error(&a->archive, ENOMEM,
1870                             "No memory for file name");
1871                         goto fail;
1872                 }
1873                 memcpy(file->utf16be_name, p, name_len);
1874                 file->utf16be_bytes = name_len;
1875         } else {
1876                 /* Chop off trailing ';1' from files. */
1877                 if (name_len > 2 && p[name_len - 2] == ';' &&
1878                                 p[name_len - 1] == '1')
1879                         name_len -= 2;
1880                 /* Chop off trailing '.' from filenames. */
1881                 if (name_len > 1 && p[name_len - 1] == '.')
1882                         --name_len;
1883
1884                 archive_strncpy(&file->name, (const char *)p, name_len);
1885         }
1886
1887         flags = isodirrec[DR_flags_offset];
1888         if (flags & 0x02)
1889                 file->mode = AE_IFDIR | 0700;
1890         else
1891                 file->mode = AE_IFREG | 0400;
1892         if (flags & 0x80)
1893                 file->multi_extent = 1;
1894         else
1895                 file->multi_extent = 0;
1896         /*
1897          * Use a location for the file number, which is treated as an inode
1898          * number to find out hardlink target. If Rockridge extensions is
1899          * being used, the file number will be overwritten by FILE SERIAL
1900          * NUMBER of RRIP "PX" extension.
1901          * Note: Old mkisofs did not record that FILE SERIAL NUMBER
1902          * in ISO images.
1903          * Note2: xorriso set 0 to the location of a symlink file.
1904          */
1905         if (file->size == 0 && location >= 0) {
1906                 /* If file->size is zero, its location points wrong place,
1907                  * and so we should not use it for the file number.
1908                  * When the location has negative value, it can be used
1909                  * for the file number.
1910                  */
1911                 file->number = -1;
1912                 /* Do not appear before any directory entries. */
1913                 file->offset = -1;
1914         } else
1915                 file->number = (int64_t)(uint32_t)location;
1916
1917         /* Rockridge extensions overwrite information from above. */
1918         if (iso9660->opt_support_rockridge) {
1919                 if (parent == NULL && rr_end - rr_start >= 7) {
1920                         p = rr_start;
1921                         if (memcmp(p, "SP\x07\x01\xbe\xef", 6) == 0) {
1922                                 /*
1923                                  * SP extension stores the suspOffset
1924                                  * (Number of bytes to skip between
1925                                  * filename and SUSP records.)
1926                                  * It is mandatory by the SUSP standard
1927                                  * (IEEE 1281).
1928                                  *
1929                                  * It allows SUSP to coexist with
1930                                  * non-SUSP uses of the System
1931                                  * Use Area by placing non-SUSP data
1932                                  * before SUSP data.
1933                                  *
1934                                  * SP extension must be in the root
1935                                  * directory entry, disable all SUSP
1936                                  * processing if not found.
1937                                  */
1938                                 iso9660->suspOffset = p[6];
1939                                 iso9660->seenSUSP = 1;
1940                                 rr_start += 7;
1941                         }
1942                 }
1943                 if (iso9660->seenSUSP) {
1944                         int r;
1945
1946                         file->name_continues = 0;
1947                         file->symlink_continues = 0;
1948                         rr_start += iso9660->suspOffset;
1949                         r = parse_rockridge(a, file, rr_start, rr_end);
1950                         if (r != ARCHIVE_OK)
1951                                 goto fail;
1952                         /*
1953                          * A file size of symbolic link files in ISO images
1954                          * made by makefs is not zero and its location is
1955                          * the same as those of next regular file. That is
1956                          * the same as hard like file and it causes unexpected
1957                          * error.
1958                          */
1959                         if (file->size > 0 &&
1960                             (file->mode & AE_IFMT) == AE_IFLNK) {
1961                                 file->size = 0;
1962                                 file->number = -1;
1963                                 file->offset = -1;
1964                         }
1965                 } else
1966                         /* If there isn't SUSP, disable parsing
1967                          * rock ridge extensions. */
1968                         iso9660->opt_support_rockridge = 0;
1969         }
1970
1971         file->nlinks = 1;/* Reset nlink. we'll calculate it later. */
1972         /* Tell file's parent how many children that parent has. */
1973         if (parent != NULL && (flags & 0x02))
1974                 parent->subdirs++;
1975
1976         if (iso9660->seenRockridge) {
1977                 if (parent != NULL && parent->parent == NULL &&
1978                     (flags & 0x02) && iso9660->rr_moved == NULL &&
1979                     file->name.s &&
1980                     (strcmp(file->name.s, "rr_moved") == 0 ||
1981                      strcmp(file->name.s, ".rr_moved") == 0)) {
1982                         iso9660->rr_moved = file;
1983                         file->rr_moved = 1;
1984                         file->rr_moved_has_re_only = 1;
1985                         file->re = 0;
1986                         parent->subdirs--;
1987                 } else if (file->re) {
1988                         /*
1989                          * Sanity check: file's parent is rr_moved.
1990                          */
1991                         if (parent == NULL || parent->rr_moved == 0) {
1992                                 archive_set_error(&a->archive,
1993                                     ARCHIVE_ERRNO_MISC,
1994                                     "Invalid Rockridge RE");
1995                                 goto fail;
1996                         }
1997                         /*
1998                          * Sanity check: file does not have "CL" extension.
1999                          */
2000                         if (file->cl_offset) {
2001                                 archive_set_error(&a->archive,
2002                                     ARCHIVE_ERRNO_MISC,
2003                                     "Invalid Rockridge RE and CL");
2004                                 goto fail;
2005                         }
2006                         /*
2007                          * Sanity check: The file type must be a directory.
2008                          */
2009                         if ((flags & 0x02) == 0) {
2010                                 archive_set_error(&a->archive,
2011                                     ARCHIVE_ERRNO_MISC,
2012                                     "Invalid Rockridge RE");
2013                                 goto fail;
2014                         }
2015                 } else if (parent != NULL && parent->rr_moved)
2016                         file->rr_moved_has_re_only = 0;
2017                 else if (parent != NULL && (flags & 0x02) &&
2018                     (parent->re || parent->re_descendant))
2019                         file->re_descendant = 1;
2020                 if (file->cl_offset) {
2021                         struct file_info *r;
2022
2023                         if (parent == NULL || parent->parent == NULL) {
2024                                 archive_set_error(&a->archive,
2025                                     ARCHIVE_ERRNO_MISC,
2026                                     "Invalid Rockridge CL");
2027                                 goto fail;
2028                         }
2029                         /*
2030                          * Sanity check: The file type must be a regular file.
2031                          */
2032                         if ((flags & 0x02) != 0) {
2033                                 archive_set_error(&a->archive,
2034                                     ARCHIVE_ERRNO_MISC,
2035                                     "Invalid Rockridge CL");
2036                                 goto fail;
2037                         }
2038                         parent->subdirs++;
2039                         /* Overwrite an offset and a number of this "CL" entry
2040                          * to appear before other dirs. "+1" to those is to
2041                          * make sure to appear after "RE" entry which this
2042                          * "CL" entry should be connected with. */
2043                         file->offset = file->number = file->cl_offset + 1;
2044
2045                         /*
2046                          * Sanity check: cl_offset does not point at its
2047                          * the parents or itself.
2048                          */
2049                         for (r = parent; r; r = r->parent) {
2050                                 if (r->offset == file->cl_offset) {
2051                                         archive_set_error(&a->archive,
2052                                             ARCHIVE_ERRNO_MISC,
2053                                             "Invalid Rockridge CL");
2054                                         goto fail;
2055                                 }
2056                         }
2057                         if (file->cl_offset == file->offset ||
2058                             parent->rr_moved) {
2059                                 archive_set_error(&a->archive,
2060                                     ARCHIVE_ERRNO_MISC,
2061                                     "Invalid Rockridge CL");
2062                                 goto fail;
2063                         }
2064                 }
2065         }
2066
2067 #if DEBUG
2068         /* DEBUGGING: Warn about attributes I don't yet fully support. */
2069         if ((flags & ~0x02) != 0) {
2070                 fprintf(stderr, "\n ** Unrecognized flag: ");
2071                 dump_isodirrec(stderr, isodirrec);
2072                 fprintf(stderr, "\n");
2073         } else if (toi(isodirrec + DR_volume_sequence_number_offset, 2) != 1) {
2074                 fprintf(stderr, "\n ** Unrecognized sequence number: ");
2075                 dump_isodirrec(stderr, isodirrec);
2076                 fprintf(stderr, "\n");
2077         } else if (*(isodirrec + DR_file_unit_size_offset) != 0) {
2078                 fprintf(stderr, "\n ** Unexpected file unit size: ");
2079                 dump_isodirrec(stderr, isodirrec);
2080                 fprintf(stderr, "\n");
2081         } else if (*(isodirrec + DR_interleave_offset) != 0) {
2082                 fprintf(stderr, "\n ** Unexpected interleave: ");
2083                 dump_isodirrec(stderr, isodirrec);
2084                 fprintf(stderr, "\n");
2085         } else if (*(isodirrec + DR_ext_attr_length_offset) != 0) {
2086                 fprintf(stderr, "\n ** Unexpected extended attribute length: ");
2087                 dump_isodirrec(stderr, isodirrec);
2088                 fprintf(stderr, "\n");
2089         }
2090 #endif
2091         register_file(iso9660, file);
2092         return (file);
2093 fail:
2094         archive_string_free(&file->name);
2095         free(file);
2096         return (NULL);
2097 }
2098
2099 static int
2100 parse_rockridge(struct archive_read *a, struct file_info *file,
2101     const unsigned char *p, const unsigned char *end)
2102 {
2103         struct iso9660 *iso9660;
2104         int entry_seen = 0;
2105
2106         iso9660 = (struct iso9660 *)(a->format->data);
2107
2108         while (p + 4 <= end  /* Enough space for another entry. */
2109             && p[0] >= 'A' && p[0] <= 'Z' /* Sanity-check 1st char of name. */
2110             && p[1] >= 'A' && p[1] <= 'Z' /* Sanity-check 2nd char of name. */
2111             && p[2] >= 4 /* Sanity-check length. */
2112             && p + p[2] <= end) { /* Sanity-check length. */
2113                 const unsigned char *data = p + 4;
2114                 int data_length = p[2] - 4;
2115                 int version = p[3];
2116
2117                 switch(p[0]) {
2118                 case 'C':
2119                         if (p[1] == 'E') {
2120                                 if (version == 1 && data_length == 24) {
2121                                         /*
2122                                          * CE extension comprises:
2123                                          *   8 byte sector containing extension
2124                                          *   8 byte offset w/in above sector
2125                                          *   8 byte length of continuation
2126                                          */
2127                                         int32_t location =
2128                                             archive_le32dec(data);
2129                                         file->ce_offset =
2130                                             archive_le32dec(data+8);
2131                                         file->ce_size =
2132                                             archive_le32dec(data+16);
2133                                         if (register_CE(a, location, file)
2134                                             != ARCHIVE_OK)
2135                                                 return (ARCHIVE_FATAL);
2136                                 }
2137                         }
2138                         else if (p[1] == 'L') {
2139                                 if (version == 1 && data_length == 8) {
2140                                         file->cl_offset = (uint64_t)
2141                                             iso9660->logical_block_size *
2142                                             (uint64_t)archive_le32dec(data);
2143                                         iso9660->seenRockridge = 1;
2144                                 }
2145                         }
2146                         break;
2147                 case 'N':
2148                         if (p[1] == 'M') {
2149                                 if (version == 1) {
2150                                         parse_rockridge_NM1(file,
2151                                             data, data_length);
2152                                         iso9660->seenRockridge = 1;
2153                                 }
2154                         }
2155                         break;
2156                 case 'P':
2157                         /*
2158                          * PD extension is padding;
2159                          * contents are always ignored.
2160                          *
2161                          * PL extension won't appear;
2162                          * contents are always ignored.
2163                          */
2164                         if (p[1] == 'N') {
2165                                 if (version == 1 && data_length == 16) {
2166                                         file->rdev = toi(data,4);
2167                                         file->rdev <<= 32;
2168                                         file->rdev |= toi(data + 8, 4);
2169                                         iso9660->seenRockridge = 1;
2170                                 }
2171                         }
2172                         else if (p[1] == 'X') {
2173                                 /*
2174                                  * PX extension comprises:
2175                                  *   8 bytes for mode,
2176                                  *   8 bytes for nlinks,
2177                                  *   8 bytes for uid,
2178                                  *   8 bytes for gid,
2179                                  *   8 bytes for inode.
2180                                  */
2181                                 if (version == 1) {
2182                                         if (data_length >= 8)
2183                                                 file->mode
2184                                                     = toi(data, 4);
2185                                         if (data_length >= 16)
2186                                                 file->nlinks
2187                                                     = toi(data + 8, 4);
2188                                         if (data_length >= 24)
2189                                                 file->uid
2190                                                     = toi(data + 16, 4);
2191                                         if (data_length >= 32)
2192                                                 file->gid
2193                                                     = toi(data + 24, 4);
2194                                         if (data_length >= 40)
2195                                                 file->number
2196                                                     = toi(data + 32, 4);
2197                                         iso9660->seenRockridge = 1;
2198                                 }
2199                         }
2200                         break;
2201                 case 'R':
2202                         if (p[1] == 'E' && version == 1) {
2203                                 file->re = 1;
2204                                 iso9660->seenRockridge = 1;
2205                         }
2206                         else if (p[1] == 'R' && version == 1) {
2207                                 /*
2208                                  * RR extension comprises:
2209                                  *    one byte flag value
2210                                  * This extension is obsolete,
2211                                  * so contents are always ignored.
2212                                  */
2213                         }
2214                         break;
2215                 case 'S':
2216                         if (p[1] == 'L') {
2217                                 if (version == 1) {
2218                                         parse_rockridge_SL1(file,
2219                                             data, data_length);
2220                                         iso9660->seenRockridge = 1;
2221                                 }
2222                         }
2223                         else if (p[1] == 'T'
2224                             && data_length == 0 && version == 1) {
2225                                 /*
2226                                  * ST extension marks end of this
2227                                  * block of SUSP entries.
2228                                  *
2229                                  * It allows SUSP to coexist with
2230                                  * non-SUSP uses of the System
2231                                  * Use Area by placing non-SUSP data
2232                                  * after SUSP data.
2233                                  */
2234                                 iso9660->seenSUSP = 0;
2235                                 iso9660->seenRockridge = 0;
2236                                 return (ARCHIVE_OK);
2237                         }
2238                         break;
2239                 case 'T':
2240                         if (p[1] == 'F') {
2241                                 if (version == 1) {
2242                                         parse_rockridge_TF1(file,
2243                                             data, data_length);
2244                                         iso9660->seenRockridge = 1;
2245                                 }
2246                         }
2247                         break;
2248                 case 'Z':
2249                         if (p[1] == 'F') {
2250                                 if (version == 1)
2251                                         parse_rockridge_ZF1(file,
2252                                             data, data_length);
2253                         }
2254                         break;
2255                 default:
2256                         break;
2257                 }
2258
2259                 p += p[2];
2260                 entry_seen = 1;
2261         }
2262
2263         if (entry_seen)
2264                 return (ARCHIVE_OK);
2265         else {
2266                 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
2267                                   "Tried to parse Rockridge extensions, but none found");
2268                 return (ARCHIVE_WARN);
2269         }
2270 }
2271
2272 static int
2273 register_CE(struct archive_read *a, int32_t location,
2274     struct file_info *file)
2275 {
2276         struct iso9660 *iso9660;
2277         struct read_ce_queue *heap;
2278         struct read_ce_req *p;
2279         uint64_t offset, parent_offset;
2280         int hole, parent;
2281
2282         iso9660 = (struct iso9660 *)(a->format->data);
2283         offset = ((uint64_t)location) * (uint64_t)iso9660->logical_block_size;
2284         if (((file->mode & AE_IFMT) == AE_IFREG &&
2285             offset >= file->offset) ||
2286             offset < iso9660->current_position ||
2287             (((uint64_t)file->ce_offset) + file->ce_size)
2288               > (uint64_t)iso9660->logical_block_size ||
2289             offset + file->ce_offset + file->ce_size
2290                   > iso9660->volume_size) {
2291                 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
2292                     "Invalid parameter in SUSP \"CE\" extension");
2293                 return (ARCHIVE_FATAL);
2294         }
2295
2296         /* Expand our CE list as necessary. */
2297         heap = &(iso9660->read_ce_req);
2298         if (heap->cnt >= heap->allocated) {
2299                 int new_size;
2300
2301                 if (heap->allocated < 16)
2302                         new_size = 16;
2303                 else
2304                         new_size = heap->allocated * 2;
2305                 /* Overflow might keep us from growing the list. */
2306                 if (new_size <= heap->allocated) {
2307                         archive_set_error(&a->archive, ENOMEM, "Out of memory");
2308                         return (ARCHIVE_FATAL);
2309                 }
2310                 p = calloc(new_size, sizeof(p[0]));
2311                 if (p == NULL) {
2312                         archive_set_error(&a->archive, ENOMEM, "Out of memory");
2313                         return (ARCHIVE_FATAL);
2314                 }
2315                 if (heap->reqs != NULL) {
2316                         memcpy(p, heap->reqs, heap->cnt * sizeof(*p));
2317                         free(heap->reqs);
2318                 }
2319                 heap->reqs = p;
2320                 heap->allocated = new_size;
2321         }
2322
2323         /*
2324          * Start with hole at end, walk it up tree to find insertion point.
2325          */
2326         hole = heap->cnt++;
2327         while (hole > 0) {
2328                 parent = (hole - 1)/2;
2329                 parent_offset = heap->reqs[parent].offset;
2330                 if (offset >= parent_offset) {
2331                         heap->reqs[hole].offset = offset;
2332                         heap->reqs[hole].file = file;
2333                         return (ARCHIVE_OK);
2334                 }
2335                 /* Move parent into hole <==> move hole up tree. */
2336                 heap->reqs[hole] = heap->reqs[parent];
2337                 hole = parent;
2338         }
2339         heap->reqs[0].offset = offset;
2340         heap->reqs[0].file = file;
2341         return (ARCHIVE_OK);
2342 }
2343
2344 static void
2345 next_CE(struct read_ce_queue *heap)
2346 {
2347         uint64_t a_offset, b_offset, c_offset;
2348         int a, b, c;
2349         struct read_ce_req tmp;
2350
2351         if (heap->cnt < 1)
2352                 return;
2353
2354         /*
2355          * Move the last item in the heap to the root of the tree
2356          */
2357         heap->reqs[0] = heap->reqs[--(heap->cnt)];
2358
2359         /*
2360          * Rebalance the heap.
2361          */
2362         a = 0; /* Starting element and its offset */
2363         a_offset = heap->reqs[a].offset;
2364         for (;;) {
2365                 b = a + a + 1; /* First child */
2366                 if (b >= heap->cnt)
2367                         return;
2368                 b_offset = heap->reqs[b].offset;
2369                 c = b + 1; /* Use second child if it is smaller. */
2370                 if (c < heap->cnt) {
2371                         c_offset = heap->reqs[c].offset;
2372                         if (c_offset < b_offset) {
2373                                 b = c;
2374                                 b_offset = c_offset;
2375                         }
2376                 }
2377                 if (a_offset <= b_offset)
2378                         return;
2379                 tmp = heap->reqs[a];
2380                 heap->reqs[a] = heap->reqs[b];
2381                 heap->reqs[b] = tmp;
2382                 a = b;
2383         }
2384 }
2385
2386
2387 static int
2388 read_CE(struct archive_read *a, struct iso9660 *iso9660)
2389 {
2390         struct read_ce_queue *heap;
2391         const unsigned char *b, *p, *end;
2392         struct file_info *file;
2393         size_t step;
2394         int r;
2395
2396         /* Read data which RRIP "CE" extension points. */
2397         heap = &(iso9660->read_ce_req);
2398         step = iso9660->logical_block_size;
2399         while (heap->cnt &&
2400             heap->reqs[0].offset == iso9660->current_position) {
2401                 b = __archive_read_ahead(a, step, NULL);
2402                 if (b == NULL) {
2403                         archive_set_error(&a->archive,
2404                             ARCHIVE_ERRNO_MISC,
2405                             "Failed to read full block when scanning "
2406                             "ISO9660 directory list");
2407                         return (ARCHIVE_FATAL);
2408                 }
2409                 do {
2410                         file = heap->reqs[0].file;
2411                         if (file->ce_offset + file->ce_size > step) {
2412                                 archive_set_error(&a->archive,
2413                                     ARCHIVE_ERRNO_FILE_FORMAT,
2414                                     "Malformed CE information");
2415                                 return (ARCHIVE_FATAL);
2416                         }
2417                         p = b + file->ce_offset;
2418                         end = p + file->ce_size;
2419                         next_CE(heap);
2420                         r = parse_rockridge(a, file, p, end);
2421                         if (r != ARCHIVE_OK)
2422                                 return (ARCHIVE_FATAL);
2423                 } while (heap->cnt &&
2424                     heap->reqs[0].offset == iso9660->current_position);
2425                 /* NOTE: Do not move this consume's code to front of
2426                  * do-while loop. Registration of nested CE extension
2427                  * might cause error because of current position. */
2428                 __archive_read_consume(a, step);
2429                 iso9660->current_position += step;
2430         }
2431         return (ARCHIVE_OK);
2432 }
2433
2434 static void
2435 parse_rockridge_NM1(struct file_info *file,
2436                     const unsigned char *data, int data_length)
2437 {
2438         if (!file->name_continues)
2439                 archive_string_empty(&file->name);
2440         file->name_continues = 0;
2441         if (data_length < 1)
2442                 return;
2443         /*
2444          * NM version 1 extension comprises:
2445          *   1 byte flag, value is one of:
2446          *     = 0: remainder is name
2447          *     = 1: remainder is name, next NM entry continues name
2448          *     = 2: "."
2449          *     = 4: ".."
2450          *     = 32: Implementation specific
2451          *     All other values are reserved.
2452          */
2453         switch(data[0]) {
2454         case 0:
2455                 if (data_length < 2)
2456                         return;
2457                 archive_strncat(&file->name,
2458                     (const char *)data + 1, data_length - 1);
2459                 break;
2460         case 1:
2461                 if (data_length < 2)
2462                         return;
2463                 archive_strncat(&file->name,
2464                     (const char *)data + 1, data_length - 1);
2465                 file->name_continues = 1;
2466                 break;
2467         case 2:
2468                 archive_strcat(&file->name, ".");
2469                 break;
2470         case 4:
2471                 archive_strcat(&file->name, "..");
2472                 break;
2473         default:
2474                 return;
2475         }
2476
2477 }
2478
2479 static void
2480 parse_rockridge_TF1(struct file_info *file, const unsigned char *data,
2481     int data_length)
2482 {
2483         char flag;
2484         /*
2485          * TF extension comprises:
2486          *   one byte flag
2487          *   create time (optional)
2488          *   modify time (optional)
2489          *   access time (optional)
2490          *   attribute time (optional)
2491          *  Time format and presence of fields
2492          *  is controlled by flag bits.
2493          */
2494         if (data_length < 1)
2495                 return;
2496         flag = data[0];
2497         ++data;
2498         --data_length;
2499         if (flag & 0x80) {
2500                 /* Use 17-byte time format. */
2501                 if ((flag & 1) && data_length >= 17) {
2502                         /* Create time. */
2503                         file->birthtime_is_set = 1;
2504                         file->birthtime = isodate17(data);
2505                         data += 17;
2506                         data_length -= 17;
2507                 }
2508                 if ((flag & 2) && data_length >= 17) {
2509                         /* Modify time. */
2510                         file->mtime = isodate17(data);
2511                         data += 17;
2512                         data_length -= 17;
2513                 }
2514                 if ((flag & 4) && data_length >= 17) {
2515                         /* Access time. */
2516                         file->atime = isodate17(data);
2517                         data += 17;
2518                         data_length -= 17;
2519                 }
2520                 if ((flag & 8) && data_length >= 17) {
2521                         /* Attribute change time. */
2522                         file->ctime = isodate17(data);
2523                 }
2524         } else {
2525                 /* Use 7-byte time format. */
2526                 if ((flag & 1) && data_length >= 7) {
2527                         /* Create time. */
2528                         file->birthtime_is_set = 1;
2529                         file->birthtime = isodate7(data);
2530                         data += 7;
2531                         data_length -= 7;
2532                 }
2533                 if ((flag & 2) && data_length >= 7) {
2534                         /* Modify time. */
2535                         file->mtime = isodate7(data);
2536                         data += 7;
2537                         data_length -= 7;
2538                 }
2539                 if ((flag & 4) && data_length >= 7) {
2540                         /* Access time. */
2541                         file->atime = isodate7(data);
2542                         data += 7;
2543                         data_length -= 7;
2544                 }
2545                 if ((flag & 8) && data_length >= 7) {
2546                         /* Attribute change time. */
2547                         file->ctime = isodate7(data);
2548                 }
2549         }
2550 }
2551
2552 static void
2553 parse_rockridge_SL1(struct file_info *file, const unsigned char *data,
2554     int data_length)
2555 {
2556         const char *separator = "";
2557
2558         if (!file->symlink_continues || file->symlink.length < 1)
2559                 archive_string_empty(&file->symlink);
2560         file->symlink_continues = 0;
2561
2562         /*
2563          * Defined flag values:
2564          *  0: This is the last SL record for this symbolic link
2565          *  1: this symbolic link field continues in next SL entry
2566          *  All other values are reserved.
2567          */
2568         if (data_length < 1)
2569                 return;
2570         switch(*data) {
2571         case 0:
2572                 break;
2573         case 1:
2574                 file->symlink_continues = 1;
2575                 break;
2576         default:
2577                 return;
2578         }
2579         ++data;  /* Skip flag byte. */
2580         --data_length;
2581
2582         /*
2583          * SL extension body stores "components".
2584          * Basically, this is a complicated way of storing
2585          * a POSIX path.  It also interferes with using
2586          * symlinks for storing non-path data. <sigh>
2587          *
2588          * Each component is 2 bytes (flag and length)
2589          * possibly followed by name data.
2590          */
2591         while (data_length >= 2) {
2592                 unsigned char flag = *data++;
2593                 unsigned char nlen = *data++;
2594                 data_length -= 2;
2595
2596                 archive_strcat(&file->symlink, separator);
2597                 separator = "/";
2598
2599                 switch(flag) {
2600                 case 0: /* Usual case, this is text. */
2601                         if (data_length < nlen)
2602                                 return;
2603                         archive_strncat(&file->symlink,
2604                             (const char *)data, nlen);
2605                         break;
2606                 case 0x01: /* Text continues in next component. */
2607                         if (data_length < nlen)
2608                                 return;
2609                         archive_strncat(&file->symlink,
2610                             (const char *)data, nlen);
2611                         separator = "";
2612                         break;
2613                 case 0x02: /* Current dir. */
2614                         archive_strcat(&file->symlink, ".");
2615                         break;
2616                 case 0x04: /* Parent dir. */
2617                         archive_strcat(&file->symlink, "..");
2618                         break;
2619                 case 0x08: /* Root of filesystem. */
2620                         archive_strcat(&file->symlink, "/");
2621                         separator = "";
2622                         break;
2623                 case 0x10: /* Undefined (historically "volume root" */
2624                         archive_string_empty(&file->symlink);
2625                         archive_strcat(&file->symlink, "ROOT");
2626                         break;
2627                 case 0x20: /* Undefined (historically "hostname") */
2628                         archive_strcat(&file->symlink, "hostname");
2629                         break;
2630                 default:
2631                         /* TODO: issue a warning ? */
2632                         return;
2633                 }
2634                 data += nlen;
2635                 data_length -= nlen;
2636         }
2637 }
2638
2639 static void
2640 parse_rockridge_ZF1(struct file_info *file, const unsigned char *data,
2641     int data_length)
2642 {
2643
2644         if (data[0] == 0x70 && data[1] == 0x7a && data_length == 12) {
2645                 /* paged zlib */
2646                 file->pz = 1;
2647                 file->pz_log2_bs = data[3];
2648                 file->pz_uncompressed_size = archive_le32dec(&data[4]);
2649         }
2650 }
2651
2652 static void
2653 register_file(struct iso9660 *iso9660, struct file_info *file)
2654 {
2655
2656         file->use_next = iso9660->use_files;
2657         iso9660->use_files = file;
2658 }
2659
2660 static void
2661 release_files(struct iso9660 *iso9660)
2662 {
2663         struct content *con, *connext;
2664         struct file_info *file;
2665
2666         file = iso9660->use_files;
2667         while (file != NULL) {
2668                 struct file_info *next = file->use_next;
2669
2670                 archive_string_free(&file->name);
2671                 archive_string_free(&file->symlink);
2672                 free(file->utf16be_name);
2673                 con = file->contents.first;
2674                 while (con != NULL) {
2675                         connext = con->next;
2676                         free(con);
2677                         con = connext;
2678                 }
2679                 free(file);
2680                 file = next;
2681         }
2682 }
2683
2684 static int
2685 next_entry_seek(struct archive_read *a, struct iso9660 *iso9660,
2686     struct file_info **pfile)
2687 {
2688         struct file_info *file;
2689         int r;
2690
2691         r = next_cache_entry(a, iso9660, pfile);
2692         if (r != ARCHIVE_OK)
2693                 return (r);
2694         file = *pfile;
2695
2696         /* Don't waste time seeking for zero-length bodies. */
2697         if (file->size == 0)
2698                 file->offset = iso9660->current_position;
2699
2700         /* flush any remaining bytes from the last round to ensure
2701          * we're positioned */
2702         if (iso9660->entry_bytes_unconsumed) {
2703                 __archive_read_consume(a, iso9660->entry_bytes_unconsumed);
2704                 iso9660->entry_bytes_unconsumed = 0;
2705         }
2706
2707         /* Seek forward to the start of the entry. */
2708         if (iso9660->current_position < file->offset) {
2709                 int64_t step;
2710
2711                 step = file->offset - iso9660->current_position;
2712                 step = __archive_read_consume(a, step);
2713                 if (step < 0)
2714                         return ((int)step);
2715                 iso9660->current_position = file->offset;
2716         }
2717
2718         /* We found body of file; handle it now. */
2719         return (ARCHIVE_OK);
2720 }
2721
2722 static int
2723 next_cache_entry(struct archive_read *a, struct iso9660 *iso9660,
2724     struct file_info **pfile)
2725 {
2726         struct file_info *file;
2727         struct {
2728                 struct file_info        *first;
2729                 struct file_info        **last;
2730         }       empty_files;
2731         int64_t number;
2732         int count;
2733
2734         file = cache_get_entry(iso9660);
2735         if (file != NULL) {
2736                 *pfile = file;
2737                 return (ARCHIVE_OK);
2738         }
2739
2740         for (;;) {
2741                 struct file_info *re, *d;
2742
2743                 *pfile = file = next_entry(iso9660);
2744                 if (file == NULL) {
2745                         /*
2746                          * If directory entries all which are descendant of
2747                          * rr_moved are still remaining, expose their.
2748                          */
2749                         if (iso9660->re_files.first != NULL &&
2750                             iso9660->rr_moved != NULL &&
2751                             iso9660->rr_moved->rr_moved_has_re_only)
2752                                 /* Expose "rr_moved" entry. */
2753                                 cache_add_entry(iso9660, iso9660->rr_moved);
2754                         while ((re = re_get_entry(iso9660)) != NULL) {
2755                                 /* Expose its descendant dirs. */
2756                                 while ((d = rede_get_entry(re)) != NULL)
2757                                         cache_add_entry(iso9660, d);
2758                         }
2759                         if (iso9660->cache_files.first != NULL)
2760                                 return (next_cache_entry(a, iso9660, pfile));
2761                         return (ARCHIVE_EOF);
2762                 }
2763
2764                 if (file->cl_offset) {
2765                         struct file_info *first_re = NULL;
2766                         int nexted_re = 0;
2767
2768                         /*
2769                          * Find "RE" dir for the current file, which
2770                          * has "CL" flag.
2771                          */
2772                         while ((re = re_get_entry(iso9660))
2773                             != first_re) {
2774                                 if (first_re == NULL)
2775                                         first_re = re;
2776                                 if (re->offset == file->cl_offset) {
2777                                         re->parent->subdirs--;
2778                                         re->parent = file->parent;
2779                                         re->re = 0;
2780                                         if (re->parent->re_descendant) {
2781                                                 nexted_re = 1;
2782                                                 re->re_descendant = 1;
2783                                                 if (rede_add_entry(re) < 0)
2784                                                         goto fatal_rr;
2785                                                 /* Move a list of descendants
2786                                                  * to a new ancestor. */
2787                                                 while ((d = rede_get_entry(
2788                                                     re)) != NULL)
2789                                                         if (rede_add_entry(d)
2790                                                             < 0)
2791                                                                 goto fatal_rr;
2792                                                 break;
2793                                         }
2794                                         /* Replace the current file
2795                                          * with "RE" dir */
2796                                         *pfile = file = re;
2797                                         /* Expose its descendant */
2798                                         while ((d = rede_get_entry(
2799                                             file)) != NULL)
2800                                                 cache_add_entry(
2801                                                     iso9660, d);
2802                                         break;
2803                                 } else
2804                                         re_add_entry(iso9660, re);
2805                         }
2806                         if (nexted_re) {
2807                                 /*
2808                                  * Do not expose this at this time
2809                                  * because we have not gotten its full-path
2810                                  * name yet.
2811                                  */
2812                                 continue;
2813                         }
2814                 } else if ((file->mode & AE_IFMT) == AE_IFDIR) {
2815                         int r;
2816
2817                         /* Read file entries in this dir. */
2818                         r = read_children(a, file);
2819                         if (r != ARCHIVE_OK)
2820                                 return (r);
2821
2822                         /*
2823                          * Handle a special dir of Rockridge extensions,
2824                          * "rr_moved".
2825                          */
2826                         if (file->rr_moved) {
2827                                 /*
2828                                  * If this has only the subdirectories which
2829                                  * have "RE" flags, do not expose at this time.
2830                                  */
2831                                 if (file->rr_moved_has_re_only)
2832                                         continue;
2833                                 /* Otherwise expose "rr_moved" entry. */
2834                         } else if (file->re) {
2835                                 /*
2836                                  * Do not expose this at this time
2837                                  * because we have not gotten its full-path
2838                                  * name yet.
2839                                  */
2840                                 re_add_entry(iso9660, file);
2841                                 continue;
2842                         } else if (file->re_descendant) {
2843                                 /*
2844                                  * If the top level "RE" entry of this entry
2845                                  * is not exposed, we, accordingly, should not
2846                                  * expose this entry at this time because
2847                                  * we cannot make its proper full-path name.
2848                                  */
2849                                 if (rede_add_entry(file) == 0)
2850                                         continue;
2851                                 /* Otherwise we can expose this entry because
2852                                  * it seems its top level "RE" has already been
2853                                  * exposed. */
2854                         }
2855                 }
2856                 break;
2857         }
2858
2859         if ((file->mode & AE_IFMT) != AE_IFREG || file->number == -1)
2860                 return (ARCHIVE_OK);
2861
2862         count = 0;
2863         number = file->number;
2864         iso9660->cache_files.first = NULL;
2865         iso9660->cache_files.last = &(iso9660->cache_files.first);
2866         empty_files.first = NULL;
2867         empty_files.last = &empty_files.first;
2868         /* Collect files which has the same file serial number.
2869          * Peek pending_files so that file which number is different
2870          * is not put back. */
2871         while (iso9660->pending_files.used > 0 &&
2872             (iso9660->pending_files.files[0]->number == -1 ||
2873              iso9660->pending_files.files[0]->number == number)) {
2874                 if (file->number == -1) {
2875                         /* This file has the same offset
2876                          * but it's wrong offset which empty files
2877                          * and symlink files have.
2878                          * NOTE: This wrong offset was recorded by
2879                          * old mkisofs utility. If ISO images is
2880                          * created by latest mkisofs, this does not
2881                          * happen.
2882                          */
2883                         file->next = NULL;
2884                         *empty_files.last = file;
2885                         empty_files.last = &(file->next);
2886                 } else {
2887                         count++;
2888                         cache_add_entry(iso9660, file);
2889                 }
2890                 file = next_entry(iso9660);
2891         }
2892
2893         if (count == 0) {
2894                 *pfile = file;
2895                 return ((file == NULL)?ARCHIVE_EOF:ARCHIVE_OK);
2896         }
2897         if (file->number == -1) {
2898                 file->next = NULL;
2899                 *empty_files.last = file;
2900                 empty_files.last = &(file->next);
2901         } else {
2902                 count++;
2903                 cache_add_entry(iso9660, file);
2904         }
2905
2906         if (count > 1) {
2907                 /* The count is the same as number of hardlink,
2908                  * so much so that each nlinks of files in cache_file
2909                  * is overwritten by value of the count.
2910                  */
2911                 for (file = iso9660->cache_files.first;
2912                     file != NULL; file = file->next)
2913                         file->nlinks = count;
2914         }
2915         /* If there are empty files, that files are added
2916          * to the tail of the cache_files. */
2917         if (empty_files.first != NULL) {
2918                 *iso9660->cache_files.last = empty_files.first;
2919                 iso9660->cache_files.last = empty_files.last;
2920         }
2921         *pfile = cache_get_entry(iso9660);
2922         return ((*pfile == NULL)?ARCHIVE_EOF:ARCHIVE_OK);
2923
2924 fatal_rr:
2925         archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
2926             "Failed to connect 'CL' pointer to 'RE' rr_moved pointer of "
2927             "Rockridge extensions: current position = %jd, CL offset = %jd",
2928             (intmax_t)iso9660->current_position, (intmax_t)file->cl_offset);
2929         return (ARCHIVE_FATAL);
2930 }
2931
2932 static inline void
2933 re_add_entry(struct iso9660 *iso9660, struct file_info *file)
2934 {
2935         file->re_next = NULL;
2936         *iso9660->re_files.last = file;
2937         iso9660->re_files.last = &(file->re_next);
2938 }
2939
2940 static inline struct file_info *
2941 re_get_entry(struct iso9660 *iso9660)
2942 {
2943         struct file_info *file;
2944
2945         if ((file = iso9660->re_files.first) != NULL) {
2946                 iso9660->re_files.first = file->re_next;
2947                 if (iso9660->re_files.first == NULL)
2948                         iso9660->re_files.last =
2949                             &(iso9660->re_files.first);
2950         }
2951         return (file);
2952 }
2953
2954 static inline int
2955 rede_add_entry(struct file_info *file)
2956 {
2957         struct file_info *re;
2958
2959         /*
2960          * Find "RE" entry.
2961          */
2962         re = file->parent;
2963         while (re != NULL && !re->re)
2964                 re = re->parent;
2965         if (re == NULL)
2966                 return (-1);
2967
2968         file->re_next = NULL;
2969         *re->rede_files.last = file;
2970         re->rede_files.last = &(file->re_next);
2971         return (0);
2972 }
2973
2974 static inline struct file_info *
2975 rede_get_entry(struct file_info *re)
2976 {
2977         struct file_info *file;
2978
2979         if ((file = re->rede_files.first) != NULL) {
2980                 re->rede_files.first = file->re_next;
2981                 if (re->rede_files.first == NULL)
2982                         re->rede_files.last =
2983                             &(re->rede_files.first);
2984         }
2985         return (file);
2986 }
2987
2988 static inline void
2989 cache_add_entry(struct iso9660 *iso9660, struct file_info *file)
2990 {
2991         file->next = NULL;
2992         *iso9660->cache_files.last = file;
2993         iso9660->cache_files.last = &(file->next);
2994 }
2995
2996 static inline struct file_info *
2997 cache_get_entry(struct iso9660 *iso9660)
2998 {
2999         struct file_info *file;
3000
3001         if ((file = iso9660->cache_files.first) != NULL) {
3002                 iso9660->cache_files.first = file->next;
3003                 if (iso9660->cache_files.first == NULL)
3004                         iso9660->cache_files.last =
3005                             &(iso9660->cache_files.first);
3006         }
3007         return (file);
3008 }
3009
3010 static int
3011 heap_add_entry(struct archive_read *a, struct heap_queue *heap,
3012     struct file_info *file, uint64_t key)
3013 {
3014         uint64_t file_key, parent_key;
3015         int hole, parent;
3016
3017         /* Expand our pending files list as necessary. */
3018         if (heap->used >= heap->allocated) {
3019                 struct file_info **new_pending_files;
3020                 int new_size = heap->allocated * 2;
3021
3022                 if (heap->allocated < 1024)
3023                         new_size = 1024;
3024                 /* Overflow might keep us from growing the list. */
3025                 if (new_size <= heap->allocated) {
3026                         archive_set_error(&a->archive,
3027                             ENOMEM, "Out of memory");
3028                         return (ARCHIVE_FATAL);
3029                 }
3030                 new_pending_files = (struct file_info **)
3031                     malloc(new_size * sizeof(new_pending_files[0]));
3032                 if (new_pending_files == NULL) {
3033                         archive_set_error(&a->archive,
3034                             ENOMEM, "Out of memory");
3035                         return (ARCHIVE_FATAL);
3036                 }
3037                 if (heap->allocated)
3038                         memcpy(new_pending_files, heap->files,
3039                             heap->allocated * sizeof(new_pending_files[0]));
3040                 free(heap->files);
3041                 heap->files = new_pending_files;
3042                 heap->allocated = new_size;
3043         }
3044
3045         file_key = file->key = key;
3046
3047         /*
3048          * Start with hole at end, walk it up tree to find insertion point.
3049          */
3050         hole = heap->used++;
3051         while (hole > 0) {
3052                 parent = (hole - 1)/2;
3053                 parent_key = heap->files[parent]->key;
3054                 if (file_key >= parent_key) {
3055                         heap->files[hole] = file;
3056                         return (ARCHIVE_OK);
3057                 }
3058                 /* Move parent into hole <==> move hole up tree. */
3059                 heap->files[hole] = heap->files[parent];
3060                 hole = parent;
3061         }
3062         heap->files[0] = file;
3063
3064         return (ARCHIVE_OK);
3065 }
3066
3067 static struct file_info *
3068 heap_get_entry(struct heap_queue *heap)
3069 {
3070         uint64_t a_key, b_key, c_key;
3071         int a, b, c;
3072         struct file_info *r, *tmp;
3073
3074         if (heap->used < 1)
3075                 return (NULL);
3076
3077         /*
3078          * The first file in the list is the earliest; we'll return this.
3079          */
3080         r = heap->files[0];
3081
3082         /*
3083          * Move the last item in the heap to the root of the tree
3084          */
3085         heap->files[0] = heap->files[--(heap->used)];
3086
3087         /*
3088          * Rebalance the heap.
3089          */
3090         a = 0; /* Starting element and its heap key */
3091         a_key = heap->files[a]->key;
3092         for (;;) {
3093                 b = a + a + 1; /* First child */
3094                 if (b >= heap->used)
3095                         return (r);
3096                 b_key = heap->files[b]->key;
3097                 c = b + 1; /* Use second child if it is smaller. */
3098                 if (c < heap->used) {
3099                         c_key = heap->files[c]->key;
3100                         if (c_key < b_key) {
3101                                 b = c;
3102                                 b_key = c_key;
3103                         }
3104                 }
3105                 if (a_key <= b_key)
3106                         return (r);
3107                 tmp = heap->files[a];
3108                 heap->files[a] = heap->files[b];
3109                 heap->files[b] = tmp;
3110                 a = b;
3111         }
3112 }
3113
3114 static unsigned int
3115 toi(const void *p, int n)
3116 {
3117         const unsigned char *v = (const unsigned char *)p;
3118         if (n > 1)
3119                 return v[0] + 256 * toi(v + 1, n - 1);
3120         if (n == 1)
3121                 return v[0];
3122         return (0);
3123 }
3124
3125 static time_t
3126 isodate7(const unsigned char *v)
3127 {
3128         struct tm tm;
3129         int offset;
3130         time_t t;
3131
3132         memset(&tm, 0, sizeof(tm));
3133         tm.tm_year = v[0];
3134         tm.tm_mon = v[1] - 1;
3135         tm.tm_mday = v[2];
3136         tm.tm_hour = v[3];
3137         tm.tm_min = v[4];
3138         tm.tm_sec = v[5];
3139         /* v[6] is the signed timezone offset, in 1/4-hour increments. */
3140         offset = ((const signed char *)v)[6];
3141         if (offset > -48 && offset < 52) {
3142                 tm.tm_hour -= offset / 4;
3143                 tm.tm_min -= (offset % 4) * 15;
3144         }
3145         t = time_from_tm(&tm);
3146         if (t == (time_t)-1)
3147                 return ((time_t)0);
3148         return (t);
3149 }
3150
3151 static time_t
3152 isodate17(const unsigned char *v)
3153 {
3154         struct tm tm;
3155         int offset;
3156         time_t t;
3157
3158         memset(&tm, 0, sizeof(tm));
3159         tm.tm_year = (v[0] - '0') * 1000 + (v[1] - '0') * 100
3160             + (v[2] - '0') * 10 + (v[3] - '0')
3161             - 1900;
3162         tm.tm_mon = (v[4] - '0') * 10 + (v[5] - '0');
3163         tm.tm_mday = (v[6] - '0') * 10 + (v[7] - '0');
3164         tm.tm_hour = (v[8] - '0') * 10 + (v[9] - '0');
3165         tm.tm_min = (v[10] - '0') * 10 + (v[11] - '0');
3166         tm.tm_sec = (v[12] - '0') * 10 + (v[13] - '0');
3167         /* v[16] is the signed timezone offset, in 1/4-hour increments. */
3168         offset = ((const signed char *)v)[16];
3169         if (offset > -48 && offset < 52) {
3170                 tm.tm_hour -= offset / 4;
3171                 tm.tm_min -= (offset % 4) * 15;
3172         }
3173         t = time_from_tm(&tm);
3174         if (t == (time_t)-1)
3175                 return ((time_t)0);
3176         return (t);
3177 }
3178
3179 static time_t
3180 time_from_tm(struct tm *t)
3181 {
3182 #if HAVE_TIMEGM
3183         /* Use platform timegm() if available. */
3184         return (timegm(t));
3185 #elif HAVE__MKGMTIME64
3186         return (_mkgmtime64(t));
3187 #else
3188         /* Else use direct calculation using POSIX assumptions. */
3189         /* First, fix up tm_yday based on the year/month/day. */
3190         if (mktime(t) == (time_t)-1)
3191                 return ((time_t)-1);
3192         /* Then we can compute timegm() from first principles. */
3193         return (t->tm_sec
3194             + t->tm_min * 60
3195             + t->tm_hour * 3600
3196             + t->tm_yday * 86400
3197             + (t->tm_year - 70) * 31536000
3198             + ((t->tm_year - 69) / 4) * 86400
3199             - ((t->tm_year - 1) / 100) * 86400
3200             + ((t->tm_year + 299) / 400) * 86400);
3201 #endif
3202 }
3203
3204 static const char *
3205 build_pathname(struct archive_string *as, struct file_info *file, int depth)
3206 {
3207         // Plain ISO9660 only allows 8 dir levels; if we get
3208         // to 1000, then something is very, very wrong.
3209         if (depth > 1000) {
3210                 return NULL;
3211         }
3212         if (file->parent != NULL && archive_strlen(&file->parent->name) > 0) {
3213                 if (build_pathname(as, file->parent, depth + 1) == NULL) {
3214                         return NULL;
3215                 }
3216                 archive_strcat(as, "/");
3217         }
3218         if (archive_strlen(&file->name) == 0)
3219                 archive_strcat(as, ".");
3220         else
3221                 archive_string_concat(as, &file->name);
3222         return (as->s);
3223 }
3224
3225 static int
3226 build_pathname_utf16be(unsigned char *p, size_t max, size_t *len,
3227     struct file_info *file)
3228 {
3229         if (file->parent != NULL && file->parent->utf16be_bytes > 0) {
3230                 if (build_pathname_utf16be(p, max, len, file->parent) != 0)
3231                         return (-1);
3232                 p[*len] = 0;
3233                 p[*len + 1] = '/';
3234                 *len += 2;
3235         }
3236         if (file->utf16be_bytes == 0) {
3237                 if (*len + 2 > max)
3238                         return (-1);/* Path is too long! */
3239                 p[*len] = 0;
3240                 p[*len + 1] = '.';
3241                 *len += 2;
3242         } else {
3243                 if (*len + file->utf16be_bytes > max)
3244                         return (-1);/* Path is too long! */
3245                 memcpy(p + *len, file->utf16be_name, file->utf16be_bytes);
3246                 *len += file->utf16be_bytes;
3247         }
3248         return (0);
3249 }
3250
3251 #if DEBUG
3252 static void
3253 dump_isodirrec(FILE *out, const unsigned char *isodirrec)
3254 {
3255         fprintf(out, " l %d,",
3256             toi(isodirrec + DR_length_offset, DR_length_size));
3257         fprintf(out, " a %d,",
3258             toi(isodirrec + DR_ext_attr_length_offset, DR_ext_attr_length_size));
3259         fprintf(out, " ext 0x%x,",
3260             toi(isodirrec + DR_extent_offset, DR_extent_size));
3261         fprintf(out, " s %d,",
3262             toi(isodirrec + DR_size_offset, DR_extent_size));
3263         fprintf(out, " f 0x%x,",
3264             toi(isodirrec + DR_flags_offset, DR_flags_size));
3265         fprintf(out, " u %d,",
3266             toi(isodirrec + DR_file_unit_size_offset, DR_file_unit_size_size));
3267         fprintf(out, " ilv %d,",
3268             toi(isodirrec + DR_interleave_offset, DR_interleave_size));
3269         fprintf(out, " seq %d,",
3270             toi(isodirrec + DR_volume_sequence_number_offset,
3271                 DR_volume_sequence_number_size));
3272         fprintf(out, " nl %d:",
3273             toi(isodirrec + DR_name_len_offset, DR_name_len_size));
3274         fprintf(out, " `%.*s'",
3275             toi(isodirrec + DR_name_len_offset, DR_name_len_size),
3276                 isodirrec + DR_name_offset);
3277 }
3278 #endif