archive_write_set_format_zip.c revision 229592
1228753Smm/*- 2228753Smm * Copyright (c) 2008 Anselm Strauss 3228753Smm * Copyright (c) 2009 Joerg Sonnenberger 4228753Smm * All rights reserved. 5228753Smm * 6228753Smm * Redistribution and use in source and binary forms, with or without 7228753Smm * modification, are permitted provided that the following conditions 8228753Smm * are met: 9228753Smm * 1. Redistributions of source code must retain the above copyright 10228753Smm * notice, this list of conditions and the following disclaimer. 11228753Smm * 2. Redistributions in binary form must reproduce the above copyright 12228753Smm * notice, this list of conditions and the following disclaimer in the 13228753Smm * documentation and/or other materials provided with the distribution. 14228753Smm * 15228753Smm * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR 16228753Smm * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17228753Smm * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18228753Smm * IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT, 19228753Smm * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20228753Smm * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21228753Smm * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22228753Smm * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23228753Smm * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24228753Smm * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25228753Smm */ 26228753Smm 27228753Smm/* 28228753Smm * Development supported by Google Summer of Code 2008. 29228753Smm */ 30228753Smm 31228753Smm/* 32228753Smm * The current implementation is very limited: 33228753Smm * 34228753Smm * - No encryption support. 35228753Smm * - No ZIP64 support. 36228753Smm * - No support for splitting and spanning. 37228753Smm * - Only supports regular file and folder entries. 38228753Smm * 39228753Smm * Note that generally data in ZIP files is little-endian encoded, 40228753Smm * with some exceptions. 41228753Smm * 42228753Smm * TODO: Since Libarchive is generally 64bit oriented, but this implementation 43228753Smm * does not yet support sizes exceeding 32bit, it is highly fragile for 44228753Smm * big archives. This should change when ZIP64 is finally implemented, otherwise 45228753Smm * some serious checking has to be done. 46228753Smm * 47228753Smm */ 48228753Smm 49228753Smm#include "archive_platform.h" 50229592Smm__FBSDID("$FreeBSD: stable/9/contrib/libarchive/libarchive/archive_write_set_format_zip.c 229592 2012-01-05 12:06:54Z mm $"); 51228753Smm 52228753Smm#ifdef HAVE_ERRNO_H 53228753Smm#include <errno.h> 54228753Smm#endif 55228753Smm#include <stdio.h> 56228753Smm#ifdef HAVE_STDLIB_H 57228753Smm#include <stdlib.h> 58228753Smm#endif 59228753Smm#ifdef HAVE_STRING_H 60228753Smm#include <string.h> 61228753Smm#endif 62228753Smm#ifdef HAVE_ZLIB_H 63228753Smm#include <zlib.h> 64228753Smm#endif 65228753Smm 66228753Smm#include "archive.h" 67228753Smm#include "archive_endian.h" 68228753Smm#include "archive_entry.h" 69228753Smm#include "archive_private.h" 70228753Smm#include "archive_write_private.h" 71228753Smm 72228753Smm#ifndef HAVE_ZLIB_H 73228753Smm#include "archive_crc32.h" 74228753Smm#endif 75228753Smm 76228753Smm#define ZIP_SIGNATURE_LOCAL_FILE_HEADER 0x04034b50 77228753Smm#define ZIP_SIGNATURE_DATA_DESCRIPTOR 0x08074b50 78228753Smm#define ZIP_SIGNATURE_FILE_HEADER 0x02014b50 79228753Smm#define ZIP_SIGNATURE_CENTRAL_DIRECTORY_END 0x06054b50 80228753Smm#define ZIP_SIGNATURE_EXTRA_TIMESTAMP 0x5455 81228753Smm#define ZIP_SIGNATURE_EXTRA_UNIX 0x7855 82228753Smm#define ZIP_VERSION_EXTRACT 0x0014 /* ZIP version 2.0 is needed. */ 83228753Smm#define ZIP_VERSION_BY 0x0314 /* Made by UNIX, using ZIP version 2.0. */ 84228753Smm#define ZIP_FLAGS 0x08 /* Flagging bit 3 (count from 0) for using data descriptor. */ 85228753Smm 86228753Smmenum compression { 87228753Smm COMPRESSION_STORE = 0 88228753Smm#ifdef HAVE_ZLIB_H 89228753Smm , 90228753Smm COMPRESSION_DEFLATE = 8 91228753Smm#endif 92228753Smm}; 93228753Smm 94228753Smmstatic ssize_t archive_write_zip_data(struct archive_write *, const void *buff, size_t s); 95228753Smmstatic int archive_write_zip_finish(struct archive_write *); 96228753Smmstatic int archive_write_zip_destroy(struct archive_write *); 97228753Smmstatic int archive_write_zip_finish_entry(struct archive_write *); 98228753Smmstatic int archive_write_zip_header(struct archive_write *, struct archive_entry *); 99228753Smmstatic unsigned int dos_time(const time_t); 100228753Smmstatic size_t path_length(struct archive_entry *); 101228753Smmstatic int write_path(struct archive_entry *, struct archive_write *); 102228753Smm 103228753Smmstruct zip_local_file_header { 104228753Smm char signature[4]; 105228753Smm char version[2]; 106228753Smm char flags[2]; 107228753Smm char compression[2]; 108228753Smm char timedate[4]; 109228753Smm char crc32[4]; 110228753Smm char compressed_size[4]; 111228753Smm char uncompressed_size[4]; 112228753Smm char filename_length[2]; 113228753Smm char extra_length[2]; 114228753Smm}; 115228753Smm 116228753Smmstruct zip_file_header { 117228753Smm char signature[4]; 118228753Smm char version_by[2]; 119228753Smm char version_extract[2]; 120228753Smm char flags[2]; 121228753Smm char compression[2]; 122228753Smm char timedate[4]; 123228753Smm char crc32[4]; 124228753Smm char compressed_size[4]; 125228753Smm char uncompressed_size[4]; 126228753Smm char filename_length[2]; 127228753Smm char extra_length[2]; 128228753Smm char comment_length[2]; 129228753Smm char disk_number[2]; 130228753Smm char attributes_internal[2]; 131228753Smm char attributes_external[4]; 132228753Smm char offset[4]; 133228753Smm}; 134228753Smm 135228753Smmstruct zip_data_descriptor { 136228753Smm char signature[4]; /* Not mandatory, but recommended by specification. */ 137228753Smm char crc32[4]; 138228753Smm char compressed_size[4]; 139228753Smm char uncompressed_size[4]; 140228753Smm}; 141228753Smm 142228753Smmstruct zip_extra_data_local { 143228753Smm char time_id[2]; 144228753Smm char time_size[2]; 145228753Smm char time_flag[1]; 146228753Smm char mtime[4]; 147228753Smm char atime[4]; 148228753Smm char ctime[4]; 149228753Smm char unix_id[2]; 150228753Smm char unix_size[2]; 151228753Smm char unix_uid[2]; 152228753Smm char unix_gid[2]; 153228753Smm}; 154228753Smm 155228753Smmstruct zip_extra_data_central { 156228753Smm char time_id[2]; 157228753Smm char time_size[2]; 158228753Smm char time_flag[1]; 159228753Smm char mtime[4]; 160228753Smm char unix_id[2]; 161228753Smm char unix_size[2]; 162228753Smm}; 163228753Smm 164228753Smmstruct zip_file_header_link { 165228753Smm struct zip_file_header_link *next; 166228753Smm struct archive_entry *entry; 167228753Smm off_t offset; 168228753Smm unsigned long crc32; 169228753Smm off_t compressed_size; 170228753Smm enum compression compression; 171228753Smm}; 172228753Smm 173228753Smmstruct zip { 174228753Smm struct zip_data_descriptor data_descriptor; 175228753Smm struct zip_file_header_link *central_directory; 176228753Smm struct zip_file_header_link *central_directory_end; 177228753Smm int64_t offset; 178228753Smm int64_t written_bytes; 179228753Smm int64_t remaining_data_bytes; 180228753Smm enum compression compression; 181228753Smm 182228753Smm#ifdef HAVE_ZLIB_H 183228753Smm z_stream stream; 184228753Smm size_t len_buf; 185228753Smm unsigned char *buf; 186228753Smm#endif 187228753Smm}; 188228753Smm 189228753Smmstruct zip_central_directory_end { 190228753Smm char signature[4]; 191228753Smm char disk[2]; 192228753Smm char start_disk[2]; 193228753Smm char entries_disk[2]; 194228753Smm char entries[2]; 195228753Smm char size[4]; 196228753Smm char offset[4]; 197228753Smm char comment_length[2]; 198228753Smm}; 199228753Smm 200228753Smmstatic int 201228753Smmarchive_write_zip_options(struct archive_write *a, const char *key, 202228753Smm const char *value) 203228753Smm{ 204228753Smm struct zip *zip = a->format_data; 205228753Smm 206228753Smm if (strcmp(key, "compression") == 0) { 207228753Smm if (strcmp(value, "deflate") == 0) { 208228753Smm#ifdef HAVE_ZLIB_H 209228753Smm zip->compression = COMPRESSION_DEFLATE; 210228753Smm#else 211228753Smm archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC, 212228753Smm "deflate compression not supported"); 213228753Smm return ARCHIVE_WARN; 214228753Smm#endif 215228753Smm } else if (strcmp(value, "store") == 0) 216228753Smm zip->compression = COMPRESSION_STORE; 217228753Smm else 218228753Smm return (ARCHIVE_WARN); 219228753Smm return (ARCHIVE_OK); 220228753Smm } 221228753Smm return (ARCHIVE_WARN); 222228753Smm} 223228753Smm 224228753Smmint 225228753Smmarchive_write_set_format_zip(struct archive *_a) 226228753Smm{ 227228753Smm struct archive_write *a = (struct archive_write *)_a; 228228753Smm struct zip *zip; 229228753Smm 230228753Smm /* If another format was already registered, unregister it. */ 231228753Smm if (a->format_destroy != NULL) 232228753Smm (a->format_destroy)(a); 233228753Smm 234228753Smm zip = (struct zip *) calloc(1, sizeof(*zip)); 235228753Smm if (zip == NULL) { 236228753Smm archive_set_error(&a->archive, ENOMEM, "Can't allocate zip data"); 237228753Smm return (ARCHIVE_FATAL); 238228753Smm } 239228753Smm zip->central_directory = NULL; 240228753Smm zip->central_directory_end = NULL; 241228753Smm zip->offset = 0; 242228753Smm zip->written_bytes = 0; 243228753Smm zip->remaining_data_bytes = 0; 244228753Smm 245228753Smm#ifdef HAVE_ZLIB_H 246228753Smm zip->compression = COMPRESSION_DEFLATE; 247228753Smm zip->len_buf = 65536; 248228753Smm zip->buf = malloc(zip->len_buf); 249228753Smm if (zip->buf == NULL) { 250228753Smm archive_set_error(&a->archive, ENOMEM, "Can't allocate compression buffer"); 251228753Smm return (ARCHIVE_FATAL); 252228753Smm } 253228753Smm#else 254228753Smm zip->compression = COMPRESSION_STORE; 255228753Smm#endif 256228753Smm 257228753Smm a->format_data = zip; 258228753Smm 259228753Smm a->pad_uncompressed = 0; /* Actually not needed for now, since no compression support yet. */ 260228753Smm a->format_name = "zip"; 261228753Smm a->format_options = archive_write_zip_options; 262228753Smm a->format_write_header = archive_write_zip_header; 263228753Smm a->format_write_data = archive_write_zip_data; 264228753Smm a->format_finish_entry = archive_write_zip_finish_entry; 265228753Smm a->format_finish = archive_write_zip_finish; 266228753Smm a->format_destroy = archive_write_zip_destroy; 267228753Smm a->archive.archive_format = ARCHIVE_FORMAT_ZIP; 268228753Smm a->archive.archive_format_name = "ZIP"; 269228753Smm 270228753Smm archive_le32enc(&zip->data_descriptor.signature, 271228753Smm ZIP_SIGNATURE_DATA_DESCRIPTOR); 272228753Smm 273228753Smm return (ARCHIVE_OK); 274228753Smm} 275228753Smm 276228753Smmstatic int 277228753Smmarchive_write_zip_header(struct archive_write *a, struct archive_entry *entry) 278228753Smm{ 279228753Smm struct zip *zip; 280228753Smm struct zip_local_file_header h; 281228753Smm struct zip_extra_data_local e; 282228753Smm struct zip_data_descriptor *d; 283228753Smm struct zip_file_header_link *l; 284228753Smm int ret; 285228753Smm int64_t size; 286228753Smm mode_t type; 287228753Smm 288228753Smm /* Entries other than a regular file or a folder are skipped. */ 289228753Smm type = archive_entry_filetype(entry); 290228753Smm if ((type != AE_IFREG) & (type != AE_IFDIR)) { 291228753Smm archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC, "Filetype not supported"); 292228753Smm return ARCHIVE_FAILED; 293228753Smm }; 294228753Smm 295228753Smm /* Directory entries should have a size of 0. */ 296228753Smm if (type == AE_IFDIR) 297228753Smm archive_entry_set_size(entry, 0); 298228753Smm 299228753Smm zip = a->format_data; 300228753Smm d = &zip->data_descriptor; 301228753Smm size = archive_entry_size(entry); 302228753Smm zip->remaining_data_bytes = size; 303228753Smm 304228753Smm /* Append archive entry to the central directory data. */ 305228753Smm l = (struct zip_file_header_link *) malloc(sizeof(*l)); 306228753Smm if (l == NULL) { 307228753Smm archive_set_error(&a->archive, ENOMEM, "Can't allocate zip header data"); 308228753Smm return (ARCHIVE_FATAL); 309228753Smm } 310228753Smm l->entry = archive_entry_clone(entry); 311228753Smm /* Initialize the CRC variable and potentially the local crc32(). */ 312228753Smm l->crc32 = crc32(0, NULL, 0); 313228753Smm l->compression = zip->compression; 314228753Smm l->compressed_size = 0; 315228753Smm l->next = NULL; 316228753Smm if (zip->central_directory == NULL) { 317228753Smm zip->central_directory = l; 318228753Smm } else { 319228753Smm zip->central_directory_end->next = l; 320228753Smm } 321228753Smm zip->central_directory_end = l; 322228753Smm 323228753Smm /* Store the offset of this header for later use in central directory. */ 324228753Smm l->offset = zip->written_bytes; 325228753Smm 326228753Smm memset(&h, 0, sizeof(h)); 327228753Smm archive_le32enc(&h.signature, ZIP_SIGNATURE_LOCAL_FILE_HEADER); 328228753Smm archive_le16enc(&h.version, ZIP_VERSION_EXTRACT); 329228753Smm archive_le16enc(&h.flags, ZIP_FLAGS); 330228753Smm archive_le16enc(&h.compression, zip->compression); 331228753Smm archive_le32enc(&h.timedate, dos_time(archive_entry_mtime(entry))); 332228753Smm archive_le16enc(&h.filename_length, (uint16_t)path_length(entry)); 333228753Smm 334228753Smm switch (zip->compression) { 335228753Smm case COMPRESSION_STORE: 336228753Smm /* Setting compressed and uncompressed sizes even when specification says 337228753Smm * to set to zero when using data descriptors. Otherwise the end of the 338228753Smm * data for an entry is rather difficult to find. */ 339228753Smm archive_le32enc(&h.compressed_size, size); 340228753Smm archive_le32enc(&h.uncompressed_size, size); 341228753Smm break; 342228753Smm#ifdef HAVE_ZLIB_H 343228753Smm case COMPRESSION_DEFLATE: 344228753Smm archive_le32enc(&h.uncompressed_size, size); 345228753Smm 346228753Smm zip->stream.zalloc = Z_NULL; 347228753Smm zip->stream.zfree = Z_NULL; 348228753Smm zip->stream.opaque = Z_NULL; 349228753Smm zip->stream.next_out = zip->buf; 350228753Smm zip->stream.avail_out = zip->len_buf; 351228753Smm if (deflateInit2(&zip->stream, Z_DEFAULT_COMPRESSION, Z_DEFLATED, 352228753Smm -15, 8, Z_DEFAULT_STRATEGY) != Z_OK) { 353228753Smm archive_set_error(&a->archive, ENOMEM, "Can't init deflate compressor"); 354228753Smm return (ARCHIVE_FATAL); 355228753Smm } 356228753Smm break; 357228753Smm#endif 358228753Smm } 359228753Smm 360228753Smm /* Formatting extra data. */ 361228753Smm archive_le16enc(&h.extra_length, sizeof(e)); 362228753Smm archive_le16enc(&e.time_id, ZIP_SIGNATURE_EXTRA_TIMESTAMP); 363228753Smm archive_le16enc(&e.time_size, sizeof(e.time_flag) + 364228753Smm sizeof(e.mtime) + sizeof(e.atime) + sizeof(e.ctime)); 365228753Smm e.time_flag[0] = 0x07; 366228753Smm archive_le32enc(&e.mtime, archive_entry_mtime(entry)); 367228753Smm archive_le32enc(&e.atime, archive_entry_atime(entry)); 368228753Smm archive_le32enc(&e.ctime, archive_entry_ctime(entry)); 369228753Smm 370228753Smm archive_le16enc(&e.unix_id, ZIP_SIGNATURE_EXTRA_UNIX); 371228753Smm archive_le16enc(&e.unix_size, sizeof(e.unix_uid) + sizeof(e.unix_gid)); 372228753Smm archive_le16enc(&e.unix_uid, archive_entry_uid(entry)); 373228753Smm archive_le16enc(&e.unix_gid, archive_entry_gid(entry)); 374228753Smm 375228753Smm archive_le32enc(&d->uncompressed_size, size); 376228753Smm 377228753Smm ret = (a->compressor.write)(a, &h, sizeof(h)); 378228753Smm if (ret != ARCHIVE_OK) 379228753Smm return (ARCHIVE_FATAL); 380228753Smm zip->written_bytes += sizeof(h); 381228753Smm 382228753Smm ret = write_path(entry, a); 383228753Smm if (ret <= ARCHIVE_OK) 384228753Smm return (ARCHIVE_FATAL); 385228753Smm zip->written_bytes += ret; 386228753Smm 387228753Smm ret = (a->compressor.write)(a, &e, sizeof(e)); 388228753Smm if (ret != ARCHIVE_OK) 389228753Smm return (ARCHIVE_FATAL); 390228753Smm zip->written_bytes += sizeof(e); 391228753Smm 392228753Smm return (ARCHIVE_OK); 393228753Smm} 394228753Smm 395228753Smmstatic ssize_t 396228753Smmarchive_write_zip_data(struct archive_write *a, const void *buff, size_t s) 397228753Smm{ 398228753Smm int ret; 399228753Smm struct zip *zip = a->format_data; 400228753Smm struct zip_file_header_link *l = zip->central_directory_end; 401228753Smm 402228753Smm if ((int64_t)s > zip->remaining_data_bytes) 403228753Smm s = (size_t)zip->remaining_data_bytes; 404228753Smm 405228753Smm if (s == 0) return 0; 406228753Smm 407228753Smm switch (zip->compression) { 408228753Smm case COMPRESSION_STORE: 409228753Smm ret = (a->compressor.write)(a, buff, s); 410228753Smm if (ret != ARCHIVE_OK) return (ret); 411228753Smm zip->written_bytes += s; 412228753Smm zip->remaining_data_bytes -= s; 413228753Smm l->compressed_size += s; 414228753Smm l->crc32 = crc32(l->crc32, buff, s); 415228753Smm return (s); 416228753Smm#if HAVE_ZLIB_H 417228753Smm case COMPRESSION_DEFLATE: 418228753Smm zip->stream.next_in = (unsigned char*)(uintptr_t)buff; 419228753Smm zip->stream.avail_in = s; 420228753Smm do { 421228753Smm ret = deflate(&zip->stream, Z_NO_FLUSH); 422228753Smm if (ret == Z_STREAM_ERROR) 423228753Smm return (ARCHIVE_FATAL); 424228753Smm if (zip->stream.avail_out == 0) { 425228753Smm ret = (a->compressor.write)(a, zip->buf, zip->len_buf); 426228753Smm if (ret != ARCHIVE_OK) 427228753Smm return (ret); 428228753Smm l->compressed_size += zip->len_buf; 429228753Smm zip->written_bytes += zip->len_buf; 430228753Smm zip->stream.next_out = zip->buf; 431228753Smm zip->stream.avail_out = zip->len_buf; 432228753Smm } 433228753Smm } while (zip->stream.avail_in != 0); 434228753Smm zip->remaining_data_bytes -= s; 435228753Smm /* If we have it, use zlib's fast crc32() */ 436228753Smm l->crc32 = crc32(l->crc32, buff, s); 437228753Smm return (s); 438228753Smm#endif 439228753Smm 440228753Smm default: 441228753Smm archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC, 442228753Smm "Invalid ZIP compression type"); 443228753Smm return ARCHIVE_FATAL; 444228753Smm } 445228753Smm} 446228753Smm 447228753Smmstatic int 448228753Smmarchive_write_zip_finish_entry(struct archive_write *a) 449228753Smm{ 450228753Smm /* Write the data descripter after file data has been written. */ 451228753Smm int ret; 452228753Smm struct zip *zip = a->format_data; 453228753Smm struct zip_data_descriptor *d = &zip->data_descriptor; 454228753Smm struct zip_file_header_link *l = zip->central_directory_end; 455228753Smm#if HAVE_ZLIB_H 456228753Smm size_t reminder; 457228753Smm#endif 458228753Smm 459228753Smm switch(zip->compression) { 460228753Smm case COMPRESSION_STORE: 461228753Smm break; 462228753Smm#if HAVE_ZLIB_H 463228753Smm case COMPRESSION_DEFLATE: 464228753Smm for (;;) { 465228753Smm ret = deflate(&zip->stream, Z_FINISH); 466228753Smm if (ret == Z_STREAM_ERROR) 467228753Smm return (ARCHIVE_FATAL); 468228753Smm reminder = zip->len_buf - zip->stream.avail_out; 469228753Smm ret = (a->compressor.write)(a, zip->buf, reminder); 470228753Smm if (ret != ARCHIVE_OK) 471228753Smm return (ret); 472228753Smm l->compressed_size += reminder; 473228753Smm zip->written_bytes += reminder; 474228753Smm zip->stream.next_out = zip->buf; 475228753Smm if (zip->stream.avail_out != 0) 476228753Smm break; 477228753Smm zip->stream.avail_out = zip->len_buf; 478228753Smm } 479228753Smm deflateEnd(&zip->stream); 480228753Smm break; 481228753Smm#endif 482228753Smm } 483228753Smm 484228753Smm archive_le32enc(&d->crc32, l->crc32); 485228753Smm archive_le32enc(&d->compressed_size, l->compressed_size); 486228753Smm ret = (a->compressor.write)(a, d, sizeof(*d)); 487228753Smm if (ret != ARCHIVE_OK) 488228753Smm return (ARCHIVE_FATAL); 489228753Smm zip->written_bytes += sizeof(*d); 490228753Smm return (ARCHIVE_OK); 491228753Smm} 492228753Smm 493228753Smmstatic int 494228753Smmarchive_write_zip_finish(struct archive_write *a) 495228753Smm{ 496228753Smm struct zip *zip; 497228753Smm struct zip_file_header_link *l; 498228753Smm struct zip_file_header h; 499228753Smm struct zip_central_directory_end end; 500228753Smm struct zip_extra_data_central e; 501228753Smm off_t offset_start, offset_end; 502228753Smm int entries; 503228753Smm int ret; 504228753Smm 505228753Smm if (a->compressor.write == NULL) 506228753Smm return (ARCHIVE_OK); 507228753Smm 508228753Smm zip = a->format_data; 509228753Smm l = zip->central_directory; 510228753Smm 511228753Smm /* 512228753Smm * Formatting central directory file header fields that are fixed for all entries. 513228753Smm * Fields not used (and therefor 0) are: 514228753Smm * 515228753Smm * - comment_length 516228753Smm * - disk_number 517228753Smm * - attributes_internal 518228753Smm */ 519228753Smm memset(&h, 0, sizeof(h)); 520228753Smm archive_le32enc(&h.signature, ZIP_SIGNATURE_FILE_HEADER); 521228753Smm archive_le16enc(&h.version_by, ZIP_VERSION_BY); 522228753Smm archive_le16enc(&h.version_extract, ZIP_VERSION_EXTRACT); 523228753Smm archive_le16enc(&h.flags, ZIP_FLAGS); 524228753Smm 525228753Smm entries = 0; 526228753Smm offset_start = zip->written_bytes; 527228753Smm 528228753Smm /* Formatting individual header fields per entry and 529228753Smm * writing each entry. */ 530228753Smm while (l != NULL) { 531228753Smm archive_le16enc(&h.compression, l->compression); 532228753Smm archive_le32enc(&h.timedate, dos_time(archive_entry_mtime(l->entry))); 533228753Smm archive_le32enc(&h.crc32, l->crc32); 534228753Smm archive_le32enc(&h.compressed_size, l->compressed_size); 535228753Smm archive_le32enc(&h.uncompressed_size, archive_entry_size(l->entry)); 536228753Smm archive_le16enc(&h.filename_length, (uint16_t)path_length(l->entry)); 537228753Smm archive_le16enc(&h.extra_length, sizeof(e)); 538228753Smm archive_le16enc(&h.attributes_external[2], archive_entry_mode(l->entry)); 539228753Smm archive_le32enc(&h.offset, l->offset); 540228753Smm 541228753Smm /* Formatting extra data. */ 542228753Smm archive_le16enc(&e.time_id, ZIP_SIGNATURE_EXTRA_TIMESTAMP); 543228753Smm archive_le16enc(&e.time_size, sizeof(e.mtime) + sizeof(e.time_flag)); 544228753Smm e.time_flag[0] = 0x07; 545228753Smm archive_le32enc(&e.mtime, archive_entry_mtime(l->entry)); 546228753Smm archive_le16enc(&e.unix_id, ZIP_SIGNATURE_EXTRA_UNIX); 547228753Smm archive_le16enc(&e.unix_size, 0x0000); 548228753Smm 549228753Smm ret = (a->compressor.write)(a, &h, sizeof(h)); 550228753Smm if (ret != ARCHIVE_OK) 551228753Smm return (ARCHIVE_FATAL); 552228753Smm zip->written_bytes += sizeof(h); 553228753Smm 554228753Smm ret = write_path(l->entry, a); 555228753Smm if (ret <= ARCHIVE_OK) 556228753Smm return (ARCHIVE_FATAL); 557228753Smm zip->written_bytes += ret; 558228753Smm 559228753Smm ret = (a->compressor.write)(a, &e, sizeof(e)); 560228753Smm if (ret != ARCHIVE_OK) 561228753Smm return (ARCHIVE_FATAL); 562228753Smm zip->written_bytes += sizeof(e); 563228753Smm 564228753Smm l = l->next; 565228753Smm entries++; 566228753Smm } 567228753Smm offset_end = zip->written_bytes; 568228753Smm 569228753Smm /* Formatting end of central directory. */ 570228753Smm memset(&end, 0, sizeof(end)); 571228753Smm archive_le32enc(&end.signature, ZIP_SIGNATURE_CENTRAL_DIRECTORY_END); 572228753Smm archive_le16enc(&end.entries_disk, entries); 573228753Smm archive_le16enc(&end.entries, entries); 574228753Smm archive_le32enc(&end.size, offset_end - offset_start); 575228753Smm archive_le32enc(&end.offset, offset_start); 576228753Smm 577228753Smm /* Writing end of central directory. */ 578228753Smm ret = (a->compressor.write)(a, &end, sizeof(end)); 579228753Smm if (ret != ARCHIVE_OK) 580228753Smm return (ARCHIVE_FATAL); 581228753Smm zip->written_bytes += sizeof(end); 582228753Smm return (ARCHIVE_OK); 583228753Smm} 584228753Smm 585228753Smmstatic int 586228753Smmarchive_write_zip_destroy(struct archive_write *a) 587228753Smm{ 588228753Smm struct zip *zip; 589228753Smm struct zip_file_header_link *l; 590228753Smm 591228753Smm zip = a->format_data; 592228753Smm while (zip->central_directory != NULL) { 593228753Smm l = zip->central_directory; 594228753Smm zip->central_directory = l->next; 595228753Smm archive_entry_free(l->entry); 596228753Smm free(l); 597228753Smm } 598228753Smm#ifdef HAVE_ZLIB_H 599228753Smm free(zip->buf); 600228753Smm#endif 601228753Smm free(zip); 602228753Smm a->format_data = NULL; 603228753Smm return (ARCHIVE_OK); 604228753Smm} 605228753Smm 606228753Smm/* Convert into MSDOS-style date/time. */ 607228753Smmstatic unsigned int 608228753Smmdos_time(const time_t unix_time) 609228753Smm{ 610228753Smm struct tm *t; 611228753Smm unsigned int dt; 612228753Smm 613228753Smm /* This will not preserve time when creating/extracting the archive 614228753Smm * on two systems with different time zones. */ 615228753Smm t = localtime(&unix_time); 616228753Smm 617228753Smm dt = 0; 618228753Smm dt += ((t->tm_year - 80) & 0x7f) << 9; 619228753Smm dt += ((t->tm_mon + 1) & 0x0f) << 5; 620228753Smm dt += (t->tm_mday & 0x1f); 621228753Smm dt <<= 16; 622228753Smm dt += (t->tm_hour & 0x1f) << 11; 623228753Smm dt += (t->tm_min & 0x3f) << 5; 624228753Smm dt += (t->tm_sec & 0x3e) >> 1; /* Only counting every 2 seconds. */ 625228753Smm return dt; 626228753Smm} 627228753Smm 628228753Smmstatic size_t 629228753Smmpath_length(struct archive_entry *entry) 630228753Smm{ 631228753Smm mode_t type; 632228753Smm const char *path; 633228753Smm 634228753Smm type = archive_entry_filetype(entry); 635228753Smm path = archive_entry_pathname(entry); 636228753Smm 637228753Smm if ((type == AE_IFDIR) & (path[strlen(path) - 1] != '/')) { 638228753Smm return strlen(path) + 1; 639228753Smm } else { 640228753Smm return strlen(path); 641228753Smm } 642228753Smm} 643228753Smm 644228753Smmstatic int 645228753Smmwrite_path(struct archive_entry *entry, struct archive_write *archive) 646228753Smm{ 647228753Smm int ret; 648228753Smm const char *path; 649228753Smm mode_t type; 650228753Smm size_t written_bytes; 651228753Smm 652228753Smm path = archive_entry_pathname(entry); 653228753Smm type = archive_entry_filetype(entry); 654228753Smm written_bytes = 0; 655228753Smm 656228753Smm ret = (archive->compressor.write)(archive, path, strlen(path)); 657228753Smm if (ret != ARCHIVE_OK) 658228753Smm return (ARCHIVE_FATAL); 659228753Smm written_bytes += strlen(path); 660228753Smm 661228753Smm /* Folders are recognized by a traling slash. */ 662228753Smm if ((type == AE_IFDIR) & (path[strlen(path) - 1] != '/')) { 663228753Smm ret = (archive->compressor.write)(archive, "/", 1); 664228753Smm if (ret != ARCHIVE_OK) 665228753Smm return (ARCHIVE_FATAL); 666228753Smm written_bytes += 1; 667228753Smm } 668228753Smm 669228753Smm return ((int)written_bytes); 670228753Smm} 671