contrib/libarchive/libarchive/archive_write_set_format_zip.c

   1 /*-
   2  * Copyright (c) 2008 Anselm Strauss
   3  * Copyright (c) 2009 Joerg Sonnenberger
   4  * Copyright (c) 2011-2012 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 /*
  29  * Development supported by Google Summer of Code 2008.
  30  */
  31
  32 /*
  33  * The current implementation is very limited:
  34  *
  35  *   - No encryption support.
  36  *   - No ZIP64 support.
  37  *   - No support for splitting and spanning.
  38  *   - Only supports regular file and folder entries.
  39  *
  40  * Note that generally data in ZIP files is little-endian encoded,
  41  * with some exceptions.
  42  *
  43  * TODO: Since Libarchive is generally 64bit oriented, but this implementation
  44  * does not yet support sizes exceeding 32bit, it is highly fragile for
  45  * big archives. This should change when ZIP64 is finally implemented, otherwise
  46  * some serious checking has to be done.
  47  *
  48  */
  49
  50 #include "archive_platform.h"
  51 __FBSDID("$FreeBSD: head/lib/libarchive/archive_write_set_format_zip.c 201168 2009-12-29 06:15:32Z kientzle $");
  52
  53 #ifdef HAVE_ERRNO_H
  54 #include <errno.h>
  55 #endif
  56 #ifdef HAVE_LANGINFO_H
  57 #include <langinfo.h>
  58 #endif
  59 #ifdef HAVE_STDLIB_H
  60 #include <stdlib.h>
  61 #endif
  62 #ifdef HAVE_STRING_H
  63 #include <string.h>
  64 #endif
  65 #ifdef HAVE_ZLIB_H
  66 #include <zlib.h>
  67 #endif
  68
  69 #include "archive.h"
  70 #include "archive_endian.h"
  71 #include "archive_entry.h"
  72 #include "archive_entry_locale.h"
  73 #include "archive_private.h"
  74 #include "archive_write_private.h"
  75
  76 #ifndef HAVE_ZLIB_H
  77 #include "archive_crc32.h"
  78 #endif
  79
  80 #define ZIP_SIGNATURE_LOCAL_FILE_HEADER 0x04034b50
  81 #define ZIP_SIGNATURE_DATA_DESCRIPTOR 0x08074b50
  82 #define ZIP_SIGNATURE_FILE_HEADER 0x02014b50
  83 #define ZIP_SIGNATURE_CENTRAL_DIRECTORY_END 0x06054b50
  84 #define ZIP_SIGNATURE_EXTRA_TIMESTAMP 0x5455
  85 #define ZIP_SIGNATURE_EXTRA_NEW_UNIX 0x7875
  86 #define ZIP_VERSION_EXTRACT 0x0014 /* ZIP version 2.0 is needed. */
  87 #define ZIP_VERSION_BY 0x0314 /* Made by UNIX, using ZIP version 2.0. */
  88 #define ZIP_FLAGS 0x08 /* Flagging bit 3 (count from 0) for using data descriptor. */
  89 #define ZIP_FLAGS_UTF8_NAME     (1 << 11)
  90
  91 enum compression {
  92         COMPRESSION_STORE = 0
  93 #ifdef HAVE_ZLIB_H
  94         ,
  95         COMPRESSION_DEFLATE = 8
  96 #endif
  97 };
  98
  99 static ssize_t archive_write_zip_data(struct archive_write *,
 100                    const void *buff, size_t s);
 101 static int archive_write_zip_close(struct archive_write *);
 102 static int archive_write_zip_free(struct archive_write *);
 103 static int archive_write_zip_finish_entry(struct archive_write *);
 104 static int archive_write_zip_header(struct archive_write *,
 105               struct archive_entry *);
 106 static int archive_write_zip_options(struct archive_write *,
 107               const char *, const char *);
 108 static unsigned int dos_time(const time_t);
 109 static size_t path_length(struct archive_entry *);
 110 static int write_path(struct archive_entry *, struct archive_write *);
 111
 112 #define LOCAL_FILE_HEADER_SIGNATURE             0
 113 #define LOCAL_FILE_HEADER_VERSION               4
 114 #define LOCAL_FILE_HEADER_FLAGS                 6
 115 #define LOCAL_FILE_HEADER_COMPRESSION           8
 116 #define LOCAL_FILE_HEADER_TIMEDATE              10
 117 #define LOCAL_FILE_HEADER_CRC32                 14
 118 #define LOCAL_FILE_HEADER_COMPRESSED_SIZE       18
 119 #define LOCAL_FILE_HEADER_UNCOMPRESSED_SIZE     22
 120 #define LOCAL_FILE_HEADER_FILENAME_LENGTH       26
 121 #define LOCAL_FILE_HEADER_EXTRA_LENGTH          28
 122 #define SIZE_LOCAL_FILE_HEADER                  30
 123
 124 #define FILE_HEADER_SIGNATURE                   0
 125 #define FILE_HEADER_VERSION_BY                  4
 126 #define FILE_HEADER_VERSION_EXTRACT             6
 127 #define FILE_HEADER_FLAGS                       8
 128 #define FILE_HEADER_COMPRESSION                 10
 129 #define FILE_HEADER_TIMEDATE                    12
 130 #define FILE_HEADER_CRC32                       16
 131 #define FILE_HEADER_COMPRESSED_SIZE             20
 132 #define FILE_HEADER_UNCOMPRESSED_SIZE           24
 133 #define FILE_HEADER_FILENAME_LENGTH             28
 134 #define FILE_HEADER_EXTRA_LENGTH                30
 135 #define FILE_HEADER_COMMENT_LENGTH              32
 136 #define FILE_HEADER_DISK_NUMBER                 34
 137 #define FILE_HEADER_ATTRIBUTES_INTERNAL         36
 138 #define FILE_HEADER_ATTRIBUTES_EXTERNAL         38
 139 #define FILE_HEADER_OFFSET                      42
 140 #define SIZE_FILE_HEADER                        46
 141
 142         /* Not mandatory, but recommended by specification. */
 143 #define DATA_DESCRIPTOR_SIGNATURE               0
 144 #define DATA_DESCRIPTOR_CRC32                   4
 145 #define DATA_DESCRIPTOR_COMPRESSED_SIZE         8
 146 #define DATA_DESCRIPTOR_UNCOMPRESSED_SIZE       12
 147 #define SIZE_DATA_DESCRIPTOR                    16
 148
 149 #define EXTRA_DATA_LOCAL_TIME_ID                0
 150 #define EXTRA_DATA_LOCAL_TIME_SIZE              2
 151 #define EXTRA_DATA_LOCAL_TIME_FLAG              4
 152 #define EXTRA_DATA_LOCAL_MTIME                  5
 153 #define EXTRA_DATA_LOCAL_ATIME                  9
 154 #define EXTRA_DATA_LOCAL_CTIME                  13
 155 #define EXTRA_DATA_LOCAL_UNIX_ID                17
 156 #define EXTRA_DATA_LOCAL_UNIX_SIZE              19
 157 #define EXTRA_DATA_LOCAL_UNIX_VERSION           21
 158 #define EXTRA_DATA_LOCAL_UNIX_UID_SIZE          22
 159 #define EXTRA_DATA_LOCAL_UNIX_UID               23
 160 #define EXTRA_DATA_LOCAL_UNIX_GID_SIZE          27
 161 #define EXTRA_DATA_LOCAL_UNIX_GID               28
 162 #define SIZE_EXTRA_DATA_LOCAL                   32
 163
 164 #define EXTRA_DATA_CENTRAL_TIME_ID              0
 165 #define EXTRA_DATA_CENTRAL_TIME_SIZE            2
 166 #define EXTRA_DATA_CENTRAL_TIME_FLAG            4
 167 #define EXTRA_DATA_CENTRAL_MTIME                5
 168 #define EXTRA_DATA_CENTRAL_UNIX_ID              9
 169 #define EXTRA_DATA_CENTRAL_UNIX_SIZE            11
 170 #define SIZE_EXTRA_DATA_CENTRAL                 13
 171
 172 #define CENTRAL_DIRECTORY_END_SIGNATURE         0
 173 #define CENTRAL_DIRECTORY_END_DISK              4
 174 #define CENTRAL_DIRECTORY_END_START_DISK        6
 175 #define CENTRAL_DIRECTORY_END_ENTRIES_DISK      8
 176 #define CENTRAL_DIRECTORY_END_ENTRIES           10
 177 #define CENTRAL_DIRECTORY_END_SIZE              12
 178 #define CENTRAL_DIRECTORY_END_OFFSET            16
 179 #define CENTRAL_DIRECTORY_END_COMMENT_LENGTH    20
 180 #define SIZE_CENTRAL_DIRECTORY_END              22
 181
 182 struct zip_file_header_link {
 183         struct zip_file_header_link *next;
 184         struct archive_entry *entry;
 185         int64_t offset;
 186         unsigned long crc32;
 187         int64_t compressed_size;
 188         enum compression compression;
 189         int flags;
 190 };
 191
 192 struct zip {
 193         uint8_t data_descriptor[SIZE_DATA_DESCRIPTOR];
 194         struct zip_file_header_link *central_directory;
 195         struct zip_file_header_link *central_directory_end;
 196         int64_t offset;
 197         int64_t written_bytes;
 198         int64_t remaining_data_bytes;
 199         enum compression compression;
 200         int flags;
 201         struct archive_string_conv *opt_sconv;
 202         struct archive_string_conv *sconv_default;
 203         int     init_default_conversion;
 204
 205 #ifdef HAVE_ZLIB_H
 206         z_stream stream;
 207         size_t len_buf;
 208         unsigned char *buf;
 209 #endif
 210 };
 211
 212 static int
 213 archive_write_zip_options(struct archive_write *a, const char *key,
 214     const char *val)
 215 {
 216         struct zip *zip = a->format_data;
 217         int ret = ARCHIVE_FAILED;
 218
 219         if (strcmp(key, "compression") == 0) {
 220                 if (val == NULL || val[0] == 0) {
 221                         archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
 222                             "%s: compression option needs a compression name",
 223                             a->format_name);
 224                 } else if (strcmp(val, "deflate") == 0) {
 225 #ifdef HAVE_ZLIB_H
 226                         zip->compression = COMPRESSION_DEFLATE;
 227                         ret = ARCHIVE_OK;
 228 #else
 229                         archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
 230                             "deflate compression not supported");
 231 #endif
 232                 } else if (strcmp(val, "store") == 0) {
 233                         zip->compression = COMPRESSION_STORE;
 234                         ret = ARCHIVE_OK;
 235                 }
 236                 return (ret);
 237         } else if (strcmp(key, "hdrcharset")  == 0) {
 238                 if (val == NULL || val[0] == 0) {
 239                         archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
 240                             "%s: hdrcharset option needs a character-set name",
 241                             a->format_name);
 242                 } else {
 243                         zip->opt_sconv = archive_string_conversion_to_charset(
 244                             &a->archive, val, 0);
 245                         if (zip->opt_sconv != NULL)
 246                                 ret = ARCHIVE_OK;
 247                         else
 248                                 ret = ARCHIVE_FATAL;
 249                 }
 250                 return (ret);
 251         }
 252
 253         /* Note: The "warn" return is just to inform the options
 254          * supervisor that we didn't handle it.  It will generate
 255          * a suitable error if no one used this option. */
 256         return (ARCHIVE_WARN);
 257 }
 258
 259 int
 260 archive_write_set_format_zip(struct archive *_a)
 261 {
 262         struct archive_write *a = (struct archive_write *)_a;
 263         struct zip *zip;
 264
 265         archive_check_magic(_a, ARCHIVE_WRITE_MAGIC,
 266             ARCHIVE_STATE_NEW, "archive_write_set_format_zip");
 267
 268         /* If another format was already registered, unregister it. */
 269         if (a->format_free != NULL)
 270                 (a->format_free)(a);
 271
 272         zip = (struct zip *) calloc(1, sizeof(*zip));
 273         if (zip == NULL) {
 274                 archive_set_error(&a->archive, ENOMEM,
 275                     "Can't allocate zip data");
 276                 return (ARCHIVE_FATAL);
 277         }
 278         zip->central_directory = NULL;
 279         zip->central_directory_end = NULL;
 280         zip->offset = 0;
 281         zip->written_bytes = 0;
 282         zip->remaining_data_bytes = 0;
 283
 284 #ifdef HAVE_ZLIB_H
 285         zip->compression = COMPRESSION_DEFLATE;
 286         zip->len_buf = 65536;
 287         zip->buf = malloc(zip->len_buf);
 288         if (zip->buf == NULL) {
 289                 free(zip);
 290                 archive_set_error(&a->archive, ENOMEM,
 291                     "Can't allocate compression buffer");
 292                 return (ARCHIVE_FATAL);
 293         }
 294 #else
 295         zip->compression = COMPRESSION_STORE;
 296 #endif
 297
 298         a->format_data = zip;
 299         a->format_name = "zip";
 300         a->format_options = archive_write_zip_options;
 301         a->format_write_header = archive_write_zip_header;
 302         a->format_write_data = archive_write_zip_data;
 303         a->format_finish_entry = archive_write_zip_finish_entry;
 304         a->format_close = archive_write_zip_close;
 305         a->format_free = archive_write_zip_free;
 306         a->archive.archive_format = ARCHIVE_FORMAT_ZIP;
 307         a->archive.archive_format_name = "ZIP";
 308
 309         archive_le32enc(&zip->data_descriptor[DATA_DESCRIPTOR_SIGNATURE],
 310             ZIP_SIGNATURE_DATA_DESCRIPTOR);
 311
 312         return (ARCHIVE_OK);
 313 }
 314
 315 static int
 316 is_all_ascii(const char *p)
 317 {
 318         const unsigned char *pp = (const unsigned char *)p;
 319
 320         while (*pp) {
 321                 if (*pp++ > 127)
 322                         return (0);
 323         }
 324         return (1);
 325 }
 326
 327 static int
 328 archive_write_zip_header(struct archive_write *a, struct archive_entry *entry)
 329 {
 330         struct zip *zip;
 331         uint8_t h[SIZE_LOCAL_FILE_HEADER];
 332         uint8_t e[SIZE_EXTRA_DATA_LOCAL];
 333         uint8_t *d;
 334         struct zip_file_header_link *l;
 335         struct archive_string_conv *sconv;
 336         int ret, ret2 = ARCHIVE_OK;
 337         int64_t size;
 338         mode_t type;
 339
 340         /* Entries other than a regular file or a folder are skipped. */
 341         type = archive_entry_filetype(entry);
 342         if (type != AE_IFREG && type != AE_IFDIR && type != AE_IFLNK) {
 343                 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
 344                     "Filetype not supported");
 345                 return ARCHIVE_FAILED;
 346         };
 347
 348         /* Directory entries should have a size of 0. */
 349         if (type == AE_IFDIR)
 350                 archive_entry_set_size(entry, 0);
 351
 352         zip = a->format_data;
 353         /* Setup default conversion. */
 354         if (zip->opt_sconv == NULL && !zip->init_default_conversion) {
 355                 zip->sconv_default =
 356                     archive_string_default_conversion_for_write(&(a->archive));
 357                 zip->init_default_conversion = 1;
 358         }
 359
 360         if (zip->flags == 0) {
 361                 /* Initialize the general purpose flags. */
 362                 zip->flags = ZIP_FLAGS;
 363                 if (zip->opt_sconv != NULL) {
 364                         if (strcmp(archive_string_conversion_charset_name(
 365                             zip->opt_sconv), "UTF-8") == 0)
 366                                 zip->flags |= ZIP_FLAGS_UTF8_NAME;
 367 #if HAVE_NL_LANGINFO
 368                 } else if (strcmp(nl_langinfo(CODESET), "UTF-8") == 0) {
 369                         zip->flags |= ZIP_FLAGS_UTF8_NAME;
 370 #endif
 371                 }
 372         }
 373         d = zip->data_descriptor;
 374         size = archive_entry_size(entry);
 375         zip->remaining_data_bytes = size;
 376
 377         /* Append archive entry to the central directory data. */
 378         l = (struct zip_file_header_link *) malloc(sizeof(*l));
 379         if (l == NULL) {
 380                 archive_set_error(&a->archive, ENOMEM,
 381                     "Can't allocate zip header data");
 382                 return (ARCHIVE_FATAL);
 383         }
 384 #if defined(_WIN32) && !defined(__CYGWIN__)
 385         /* Make sure the path separators in pahtname, hardlink and symlink
 386          * are all slash '/', not the Windows path separator '\'. */
 387         l->entry = __la_win_entry_in_posix_pathseparator(entry);
 388         if (l->entry == entry)
 389                 l->entry = archive_entry_clone(entry);
 390 #else
 391         l->entry = archive_entry_clone(entry);
 392 #endif
 393         if (l->entry == NULL) {
 394                 archive_set_error(&a->archive, ENOMEM,
 395                     "Can't allocate zip header data");
 396                 free(l);
 397                 return (ARCHIVE_FATAL);
 398         }
 399         l->flags = zip->flags;
 400         if (zip->opt_sconv != NULL)
 401                 sconv = zip->opt_sconv;
 402         else
 403                 sconv = zip->sconv_default;
 404         if (sconv != NULL) {
 405                 const char *p;
 406                 size_t len;
 407
 408                 if (archive_entry_pathname_l(entry, &p, &len, sconv) != 0) {
 409                         if (errno == ENOMEM) {
 410                                 archive_entry_free(l->entry);
 411                                 free(l);
 412                                 archive_set_error(&a->archive, ENOMEM,
 413                                     "Can't allocate memory for Pathname");
 414                                 return (ARCHIVE_FATAL);
 415                         }
 416                         archive_set_error(&a->archive,
 417                             ARCHIVE_ERRNO_FILE_FORMAT,
 418                             "Can't translate Pathname '%s' to %s",
 419                             archive_entry_pathname(entry),
 420                             archive_string_conversion_charset_name(sconv));
 421                         ret2 = ARCHIVE_WARN;
 422                 }
 423                 if (len > 0)
 424                         archive_entry_set_pathname(l->entry, p);
 425
 426                 /*
 427                  * Although there is no character-set regulation for Symlink,
 428                  * it is suitable to convert a character-set of Symlinke to
 429                  * what those of the Pathname has been converted to.
 430                  */
 431                 if (type == AE_IFLNK) {
 432                         if (archive_entry_symlink_l(entry, &p, &len, sconv)) {
 433                                 if (errno == ENOMEM) {
 434                                         archive_entry_free(l->entry);
 435                                         free(l);
 436                                         archive_set_error(&a->archive, ENOMEM,
 437                                             "Can't allocate memory "
 438                                             " for Symlink");
 439                                         return (ARCHIVE_FATAL);
 440                                 }
 441                                 /*
 442                                  * Even if the strng conversion failed,
 443                                  * we should not report the error since
 444                                  * thre is no regulation for.
 445                                  */
 446                         } else if (len > 0)
 447                                 archive_entry_set_symlink(l->entry, p);
 448                 }
 449         }
 450         /* If all characters in a filename are ASCII, Reset UTF-8 Name flag. */
 451         if ((l->flags & ZIP_FLAGS_UTF8_NAME) != 0 &&
 452             is_all_ascii(archive_entry_pathname(l->entry)))
 453                 l->flags &= ~ZIP_FLAGS_UTF8_NAME;
 454
 455         /* Initialize the CRC variable and potentially the local crc32(). */
 456         l->crc32 = crc32(0, NULL, 0);
 457         if (type == AE_IFLNK) {
 458                 const char *p = archive_entry_symlink(l->entry);
 459                 if (p != NULL)
 460                         size = strlen(p);
 461                 else
 462                         size = 0;
 463                 zip->remaining_data_bytes = 0;
 464                 archive_entry_set_size(l->entry, size);
 465                 l->compression = COMPRESSION_STORE;
 466                 l->compressed_size = size;
 467         } else {
 468                 l->compression = zip->compression;
 469                 l->compressed_size = 0;
 470         }
 471         l->next = NULL;
 472         if (zip->central_directory == NULL) {
 473                 zip->central_directory = l;
 474         } else {
 475                 zip->central_directory_end->next = l;
 476         }
 477         zip->central_directory_end = l;
 478
 479         /* Store the offset of this header for later use in central
 480          * directory. */
 481         l->offset = zip->written_bytes;
 482
 483         memset(h, 0, sizeof(h));
 484         archive_le32enc(&h[LOCAL_FILE_HEADER_SIGNATURE],
 485                 ZIP_SIGNATURE_LOCAL_FILE_HEADER);
 486         archive_le16enc(&h[LOCAL_FILE_HEADER_VERSION], ZIP_VERSION_EXTRACT);
 487         archive_le16enc(&h[LOCAL_FILE_HEADER_FLAGS], l->flags);
 488         archive_le16enc(&h[LOCAL_FILE_HEADER_COMPRESSION], l->compression);
 489         archive_le32enc(&h[LOCAL_FILE_HEADER_TIMEDATE],
 490                 dos_time(archive_entry_mtime(entry)));
 491         archive_le16enc(&h[LOCAL_FILE_HEADER_FILENAME_LENGTH],
 492                 (uint16_t)path_length(l->entry));
 493
 494         switch (l->compression) {
 495         case COMPRESSION_STORE:
 496                 /* Setting compressed and uncompressed sizes even when
 497                  * specification says to set to zero when using data
 498                  * descriptors. Otherwise the end of the data for an
 499                  * entry is rather difficult to find. */
 500                 archive_le32enc(&h[LOCAL_FILE_HEADER_COMPRESSED_SIZE],
 501                     (uint32_t)size);
 502                 archive_le32enc(&h[LOCAL_FILE_HEADER_UNCOMPRESSED_SIZE],
 503                     (uint32_t)size);
 504                 break;
 505 #ifdef HAVE_ZLIB_H
 506         case COMPRESSION_DEFLATE:
 507                 archive_le32enc(&h[LOCAL_FILE_HEADER_UNCOMPRESSED_SIZE],
 508                     (uint32_t)size);
 509
 510                 zip->stream.zalloc = Z_NULL;
 511                 zip->stream.zfree = Z_NULL;
 512                 zip->stream.opaque = Z_NULL;
 513                 zip->stream.next_out = zip->buf;
 514                 zip->stream.avail_out = zip->len_buf;
 515                 if (deflateInit2(&zip->stream, Z_DEFAULT_COMPRESSION,
 516                     Z_DEFLATED, -15, 8, Z_DEFAULT_STRATEGY) != Z_OK) {
 517                         archive_set_error(&a->archive, ENOMEM,
 518                             "Can't init deflate compressor");
 519                         return (ARCHIVE_FATAL);
 520                 }
 521                 break;
 522 #endif
 523         }
 524
 525         /* Formatting extra data. */
 526         archive_le16enc(&h[LOCAL_FILE_HEADER_EXTRA_LENGTH], sizeof(e));
 527         archive_le16enc(&e[EXTRA_DATA_LOCAL_TIME_ID],
 528                 ZIP_SIGNATURE_EXTRA_TIMESTAMP);
 529         archive_le16enc(&e[EXTRA_DATA_LOCAL_TIME_SIZE], 1 + 4 * 3);
 530         e[EXTRA_DATA_LOCAL_TIME_FLAG] = 0x07;
 531         archive_le32enc(&e[EXTRA_DATA_LOCAL_MTIME],
 532             (uint32_t)archive_entry_mtime(entry));
 533         archive_le32enc(&e[EXTRA_DATA_LOCAL_ATIME],
 534             (uint32_t)archive_entry_atime(entry));
 535         archive_le32enc(&e[EXTRA_DATA_LOCAL_CTIME],
 536             (uint32_t)archive_entry_ctime(entry));
 537
 538         archive_le16enc(&e[EXTRA_DATA_LOCAL_UNIX_ID],
 539                 ZIP_SIGNATURE_EXTRA_NEW_UNIX);
 540         archive_le16enc(&e[EXTRA_DATA_LOCAL_UNIX_SIZE], 1 + (1 + 4) * 2);
 541         e[EXTRA_DATA_LOCAL_UNIX_VERSION] = 1;
 542         e[EXTRA_DATA_LOCAL_UNIX_UID_SIZE] = 4;
 543         archive_le32enc(&e[EXTRA_DATA_LOCAL_UNIX_UID],
 544                 (uint32_t)archive_entry_uid(entry));
 545         e[EXTRA_DATA_LOCAL_UNIX_GID_SIZE] = 4;
 546         archive_le32enc(&e[EXTRA_DATA_LOCAL_UNIX_GID],
 547                 (uint32_t)archive_entry_gid(entry));
 548
 549         archive_le32enc(&d[DATA_DESCRIPTOR_UNCOMPRESSED_SIZE],
 550             (uint32_t)size);
 551
 552         ret = __archive_write_output(a, h, sizeof(h));
 553         if (ret != ARCHIVE_OK)
 554                 return (ARCHIVE_FATAL);
 555         zip->written_bytes += sizeof(h);
 556
 557         ret = write_path(l->entry, a);
 558         if (ret <= ARCHIVE_OK)
 559                 return (ARCHIVE_FATAL);
 560         zip->written_bytes += ret;
 561
 562         ret = __archive_write_output(a, e, sizeof(e));
 563         if (ret != ARCHIVE_OK)
 564                 return (ARCHIVE_FATAL);
 565         zip->written_bytes += sizeof(e);
 566
 567         if (type == AE_IFLNK) {
 568                 const unsigned char *p;
 569
 570                 p = (const unsigned char *)archive_entry_symlink(l->entry);
 571                 ret = __archive_write_output(a, p, (size_t)size);
 572                 if (ret != ARCHIVE_OK)
 573                         return (ARCHIVE_FATAL);
 574                 zip->written_bytes += size;
 575                 l->crc32 = crc32(l->crc32, p, (unsigned)size);
 576         }
 577
 578         if (ret2 != ARCHIVE_OK)
 579                 return (ret2);
 580         return (ARCHIVE_OK);
 581 }
 582
 583 static ssize_t
 584 archive_write_zip_data(struct archive_write *a, const void *buff, size_t s)
 585 {
 586         int ret;
 587         struct zip *zip = a->format_data;
 588         struct zip_file_header_link *l = zip->central_directory_end;
 589
 590         if ((int64_t)s > zip->remaining_data_bytes)
 591                 s = (size_t)zip->remaining_data_bytes;
 592
 593         if (s == 0) return 0;
 594
 595         switch (l->compression) {
 596         case COMPRESSION_STORE:
 597                 ret = __archive_write_output(a, buff, s);
 598                 if (ret != ARCHIVE_OK) return (ret);
 599                 zip->written_bytes += s;
 600                 zip->remaining_data_bytes -= s;
 601                 l->compressed_size += s;
 602                 l->crc32 = crc32(l->crc32, buff, s);
 603                 return (s);
 604 #if HAVE_ZLIB_H
 605         case COMPRESSION_DEFLATE:
 606                 zip->stream.next_in = (unsigned char*)(uintptr_t)buff;
 607                 zip->stream.avail_in = s;
 608                 do {
 609                         ret = deflate(&zip->stream, Z_NO_FLUSH);
 610                         if (ret == Z_STREAM_ERROR)
 611                                 return (ARCHIVE_FATAL);
 612                         if (zip->stream.avail_out == 0) {
 613                                 ret = __archive_write_output(a, zip->buf,
 614                                         zip->len_buf);
 615                                 if (ret != ARCHIVE_OK)
 616                                         return (ret);
 617                                 l->compressed_size += zip->len_buf;
 618                                 zip->written_bytes += zip->len_buf;
 619                                 zip->stream.next_out = zip->buf;
 620                                 zip->stream.avail_out = zip->len_buf;
 621                         }
 622                 } while (zip->stream.avail_in != 0);
 623                 zip->remaining_data_bytes -= s;
 624                 /* If we have it, use zlib's fast crc32() */
 625                 l->crc32 = crc32(l->crc32, buff, s);
 626                 return (s);
 627 #endif
 628
 629         default:
 630                 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
 631                     "Invalid ZIP compression type");
 632                 return ARCHIVE_FATAL;
 633         }
 634 }
 635
 636 static int
 637 archive_write_zip_finish_entry(struct archive_write *a)
 638 {
 639         /* Write the data descripter after file data has been written. */
 640         int ret;
 641         struct zip *zip = a->format_data;
 642         uint8_t *d = zip->data_descriptor;
 643         struct zip_file_header_link *l = zip->central_directory_end;
 644 #if HAVE_ZLIB_H
 645         size_t reminder;
 646 #endif
 647
 648         switch(l->compression) {
 649         case COMPRESSION_STORE:
 650                 break;
 651 #if HAVE_ZLIB_H
 652         case COMPRESSION_DEFLATE:
 653                 for (;;) {
 654                         ret = deflate(&zip->stream, Z_FINISH);
 655                         if (ret == Z_STREAM_ERROR)
 656                                 return (ARCHIVE_FATAL);
 657                         reminder = zip->len_buf - zip->stream.avail_out;
 658                         ret = __archive_write_output(a, zip->buf, reminder);
 659                         if (ret != ARCHIVE_OK)
 660                                 return (ret);
 661                         l->compressed_size += reminder;
 662                         zip->written_bytes += reminder;
 663                         zip->stream.next_out = zip->buf;
 664                         if (zip->stream.avail_out != 0)
 665                                 break;
 666                         zip->stream.avail_out = zip->len_buf;
 667                 }
 668                 deflateEnd(&zip->stream);
 669                 break;
 670 #endif
 671         }
 672
 673         archive_le32enc(&d[DATA_DESCRIPTOR_CRC32], l->crc32);
 674         archive_le32enc(&d[DATA_DESCRIPTOR_COMPRESSED_SIZE],
 675                 (uint32_t)l->compressed_size);
 676         ret = __archive_write_output(a, d, SIZE_DATA_DESCRIPTOR);
 677         if (ret != ARCHIVE_OK)
 678                 return (ARCHIVE_FATAL);
 679         zip->written_bytes += SIZE_DATA_DESCRIPTOR;
 680         return (ARCHIVE_OK);
 681 }
 682
 683 static int
 684 archive_write_zip_close(struct archive_write *a)
 685 {
 686         struct zip *zip;
 687         struct zip_file_header_link *l;
 688         uint8_t h[SIZE_FILE_HEADER];
 689         uint8_t end[SIZE_CENTRAL_DIRECTORY_END];
 690         uint8_t e[SIZE_EXTRA_DATA_CENTRAL];
 691         int64_t offset_start, offset_end;
 692         int entries;
 693         int ret;
 694
 695         zip = a->format_data;
 696         l = zip->central_directory;
 697
 698         /*
 699          * Formatting central directory file header fields that are
 700          * fixed for all entries.
 701          * Fields not used (and therefor 0) are:
 702          *
 703          *   - comment_length
 704          *   - disk_number
 705          *   - attributes_internal
 706          */
 707         memset(h, 0, sizeof(h));
 708         archive_le32enc(&h[FILE_HEADER_SIGNATURE], ZIP_SIGNATURE_FILE_HEADER);
 709         archive_le16enc(&h[FILE_HEADER_VERSION_BY], ZIP_VERSION_BY);
 710         archive_le16enc(&h[FILE_HEADER_VERSION_EXTRACT], ZIP_VERSION_EXTRACT);
 711
 712         entries = 0;
 713         offset_start = zip->written_bytes;
 714
 715         /* Formatting individual header fields per entry and
 716          * writing each entry. */
 717         while (l != NULL) {
 718                 archive_le16enc(&h[FILE_HEADER_FLAGS], l->flags);
 719                 archive_le16enc(&h[FILE_HEADER_COMPRESSION], l->compression);
 720                 archive_le32enc(&h[FILE_HEADER_TIMEDATE],
 721                         dos_time(archive_entry_mtime(l->entry)));
 722                 archive_le32enc(&h[FILE_HEADER_CRC32], l->crc32);
 723                 archive_le32enc(&h[FILE_HEADER_COMPRESSED_SIZE],
 724                         (uint32_t)l->compressed_size);
 725                 archive_le32enc(&h[FILE_HEADER_UNCOMPRESSED_SIZE],
 726                         (uint32_t)archive_entry_size(l->entry));
 727                 archive_le16enc(&h[FILE_HEADER_FILENAME_LENGTH],
 728                         (uint16_t)path_length(l->entry));
 729                 archive_le16enc(&h[FILE_HEADER_EXTRA_LENGTH], sizeof(e));
 730                 archive_le16enc(&h[FILE_HEADER_ATTRIBUTES_EXTERNAL+2],
 731                         archive_entry_mode(l->entry));
 732                 archive_le32enc(&h[FILE_HEADER_OFFSET], (uint32_t)l->offset);
 733
 734                 /* Formatting extra data. */
 735                 archive_le16enc(&e[EXTRA_DATA_CENTRAL_TIME_ID],
 736                         ZIP_SIGNATURE_EXTRA_TIMESTAMP);
 737                 archive_le16enc(&e[EXTRA_DATA_CENTRAL_TIME_SIZE], 1 + 4);
 738                 e[EXTRA_DATA_CENTRAL_TIME_FLAG] = 0x07;
 739                 archive_le32enc(&e[EXTRA_DATA_CENTRAL_MTIME],
 740                         (uint32_t)archive_entry_mtime(l->entry));
 741                 archive_le16enc(&e[EXTRA_DATA_CENTRAL_UNIX_ID],
 742                         ZIP_SIGNATURE_EXTRA_NEW_UNIX);
 743                 archive_le16enc(&e[EXTRA_DATA_CENTRAL_UNIX_SIZE], 0x0000);
 744
 745                 ret = __archive_write_output(a, h, sizeof(h));
 746                 if (ret != ARCHIVE_OK)
 747                         return (ARCHIVE_FATAL);
 748                 zip->written_bytes += sizeof(h);
 749
 750                 ret = write_path(l->entry, a);
 751                 if (ret <= ARCHIVE_OK)
 752                         return (ARCHIVE_FATAL);
 753                 zip->written_bytes += ret;
 754
 755                 ret = __archive_write_output(a, e, sizeof(e));
 756                 if (ret != ARCHIVE_OK)
 757                         return (ARCHIVE_FATAL);
 758                 zip->written_bytes += sizeof(e);
 759
 760                 l = l->next;
 761                 entries++;
 762         }
 763         offset_end = zip->written_bytes;
 764
 765         /* Formatting end of central directory. */
 766         memset(end, 0, sizeof(end));
 767         archive_le32enc(&end[CENTRAL_DIRECTORY_END_SIGNATURE],
 768                 ZIP_SIGNATURE_CENTRAL_DIRECTORY_END);
 769         archive_le16enc(&end[CENTRAL_DIRECTORY_END_ENTRIES_DISK], entries);
 770         archive_le16enc(&end[CENTRAL_DIRECTORY_END_ENTRIES], entries);
 771         archive_le32enc(&end[CENTRAL_DIRECTORY_END_SIZE],
 772                 (uint32_t)(offset_end - offset_start));
 773         archive_le32enc(&end[CENTRAL_DIRECTORY_END_OFFSET],
 774                 (uint32_t)offset_start);
 775
 776         /* Writing end of central directory. */
 777         ret = __archive_write_output(a, end, sizeof(end));
 778         if (ret != ARCHIVE_OK)
 779                 return (ARCHIVE_FATAL);
 780         zip->written_bytes += sizeof(end);
 781         return (ARCHIVE_OK);
 782 }
 783
 784 static int
 785 archive_write_zip_free(struct archive_write *a)
 786 {
 787         struct zip *zip;
 788         struct zip_file_header_link *l;
 789
 790         zip = a->format_data;
 791         while (zip->central_directory != NULL) {
 792            l = zip->central_directory;
 793            zip->central_directory = l->next;
 794            archive_entry_free(l->entry);
 795            free(l);
 796         }
 797 #ifdef HAVE_ZLIB_H
 798         free(zip->buf);
 799 #endif
 800         free(zip);
 801         a->format_data = NULL;
 802         return (ARCHIVE_OK);
 803 }
 804
 805 /* Convert into MSDOS-style date/time. */
 806 static unsigned int
 807 dos_time(const time_t unix_time)
 808 {
 809         struct tm *t;
 810         unsigned int dt;
 811
 812         /* This will not preserve time when creating/extracting the archive
 813          * on two systems with different time zones. */
 814         t = localtime(&unix_time);
 815
 816         /* MSDOS-style date/time is only between 1980-01-01 and 2107-12-31 */
 817         if (t->tm_year < 1980 - 1900)
 818                 /* Set minimum date/time '1980-01-01 00:00:00'. */
 819                 dt = 0x00210000U;
 820         else if (t->tm_year > 2107 - 1900)
 821                 /* Set maximum date/time '2107-12-31 23:59:58'. */
 822                 dt = 0xff9fbf7dU;
 823         else {
 824                 dt = 0;
 825                 dt += ((t->tm_year - 80) & 0x7f) << 9;
 826                 dt += ((t->tm_mon + 1) & 0x0f) << 5;
 827                 dt += (t->tm_mday & 0x1f);
 828                 dt <<= 16;
 829                 dt += (t->tm_hour & 0x1f) << 11;
 830                 dt += (t->tm_min & 0x3f) << 5;
 831                 dt += (t->tm_sec & 0x3e) >> 1; /* Only counting every 2 seconds. */
 832         }
 833         return dt;
 834 }
 835
 836 static size_t
 837 path_length(struct archive_entry *entry)
 838 {
 839         mode_t type;
 840         const char *path;
 841
 842         type = archive_entry_filetype(entry);
 843         path = archive_entry_pathname(entry);
 844
 845         if ((type == AE_IFDIR) & (path[strlen(path) - 1] != '/')) {
 846                 return strlen(path) + 1;
 847         } else {
 848                 return strlen(path);
 849         }
 850 }
 851
 852 static int
 853 write_path(struct archive_entry *entry, struct archive_write *archive)
 854 {
 855         int ret;
 856         const char *path;
 857         mode_t type;
 858         size_t written_bytes;
 859
 860         path = archive_entry_pathname(entry);
 861         type = archive_entry_filetype(entry);
 862         written_bytes = 0;
 863
 864         ret = __archive_write_output(archive, path, strlen(path));
 865         if (ret != ARCHIVE_OK)
 866                 return (ARCHIVE_FATAL);
 867         written_bytes += strlen(path);
 868
 869         /* Folders are recognized by a traling slash. */
 870         if ((type == AE_IFDIR) & (path[strlen(path) - 1] != '/')) {
 871                 ret = __archive_write_output(archive, "/", 1);
 872                 if (ret != ARCHIVE_OK)
 873                         return (ARCHIVE_FATAL);
 874                 written_bytes += 1;
 875         }
 876
 877         return ((int)written_bytes);
 878 }