2 * Copyright (c) 2004 Tim Kientzle
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR
15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
17 * IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT,
18 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
19 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
20 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
21 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 #include "archive_platform.h"
27 __FBSDID("$FreeBSD: src/lib/libarchive/archive_read_support_format_zip.c,v 1.21 2008/02/26 07:17:47 kientzle Exp $");
42 #include "archive_entry.h"
43 #include "archive_private.h"
44 #include "archive_read_private.h"
45 #include "archive_endian.h"
48 /* entry_bytes_remaining is the number of bytes we expect. */
49 int64_t entry_bytes_remaining;
52 /* These count the number of bytes actually read for the entry. */
53 int64_t entry_compressed_bytes_read;
54 int64_t entry_uncompressed_bytes_read;
60 const char * compression_name;
68 /* Flags to mark progress of decompression. */
71 char end_of_entry_cleanup;
74 ssize_t filename_length;
76 int64_t uncompressed_size;
77 int64_t compressed_size;
79 unsigned char *uncompressed_buffer;
80 size_t uncompressed_buffer_size;
86 struct archive_string pathname;
87 struct archive_string extra;
91 #define ZIP_LENGTH_AT_END 8
93 struct zip_file_header {
100 char compressed_size[4];
101 char uncompressed_size[4];
102 char filename_length[2];
103 char extra_length[2];
106 static const char *compression_names[] = {
118 static int archive_read_format_zip_bid(struct archive_read *);
119 static int archive_read_format_zip_cleanup(struct archive_read *);
120 static int archive_read_format_zip_read_data(struct archive_read *,
121 const void **, size_t *, off_t *);
122 static int archive_read_format_zip_read_data_skip(struct archive_read *a);
123 static int archive_read_format_zip_read_header(struct archive_read *,
124 struct archive_entry *);
125 static int zip_read_data_deflate(struct archive_read *a, const void **buff,
126 size_t *size, off_t *offset);
127 static int zip_read_data_none(struct archive_read *a, const void **buff,
128 size_t *size, off_t *offset);
129 static int zip_read_file_header(struct archive_read *a,
130 struct archive_entry *entry, struct zip *zip);
131 static time_t zip_time(const char *);
132 static void process_extra(const void* extra, struct zip* zip);
135 archive_read_support_format_zip(struct archive *_a)
137 struct archive_read *a = (struct archive_read *)_a;
141 zip = (struct zip *)malloc(sizeof(*zip));
143 archive_set_error(&a->archive, ENOMEM, "Can't allocate zip data");
144 return (ARCHIVE_FATAL);
146 memset(zip, 0, sizeof(*zip));
148 r = __archive_read_register_format(a,
150 archive_read_format_zip_bid,
151 archive_read_format_zip_read_header,
152 archive_read_format_zip_read_data,
153 archive_read_format_zip_read_data_skip,
154 archive_read_format_zip_cleanup);
163 archive_read_format_zip_bid(struct archive_read *a)
169 if ((p = __archive_read_ahead(a, 4)) == NULL)
173 * Bid of 30 here is: 16 bits for "PK",
174 * next 16-bit field has four options (-2 bits).
177 if (p[0] == 'P' && p[1] == 'K') {
178 if ((p[2] == '\001' && p[3] == '\002')
179 || (p[2] == '\003' && p[3] == '\004')
180 || (p[2] == '\005' && p[3] == '\006')
181 || (p[2] == '\007' && p[3] == '\010')
182 || (p[2] == '0' && p[3] == '0'))
187 * Attempt to handle self-extracting archives
188 * by noting a PE header and searching forward
189 * up to 64k for a 'PK\003\004' marker.
191 if (p[0] == 'M' && p[1] == 'Z') {
193 * TODO: Additional checks that this really is a PE
194 * file before we invoke the 128k lookahead below.
195 * No point in allocating a bigger lookahead buffer
196 * if we don't need to.
199 * TODO: Of course, the compression layer lookahead
200 * buffers aren't dynamically sized yet; they should be.
202 bytes_avail = (a->decompressor->read_ahead)(a, &buff, 128*1024);
203 p = (const char *)buff;
206 * TODO: Optimize by jumping forward based on values
207 * in the PE header. Note that we don't need to be
208 * exact, but we mustn't skip too far. The search
209 * below will compensate if we undershoot. Skipping
210 * will also reduce the chance of false positives
211 * (which is not really all that high to begin with,
212 * so maybe skipping isn't really necessary).
215 while (p < bytes_avail + (const char *)buff) {
216 if (p[0] == 'P' && p[1] == 'K' /* "PK" signature */
217 && p[2] == 3 && p[3] == 4 /* File entry */
218 && p[8] == 8 /* compression == deflate */
219 && p[9] == 0 /* High byte of compression */
232 * Search forward for a "PK\003\004" file header. This handles the
233 * case of self-extracting archives, where there is an executable
234 * prepended to the ZIP archive.
237 skip_sfx(struct archive_read *a)
244 * TODO: We should be able to skip forward by a bunch
245 * by lifting some values from the PE header. We don't
246 * need to be exact (we're still going to search forward
247 * to find the header), but it will speed things up and
248 * reduce the chance of a false positive.
251 bytes = (a->decompressor->read_ahead)(a, &h, 4096);
253 return (ARCHIVE_FATAL);
258 * Scan ahead until we find something that looks
259 * like the zip header.
264 /* TODO: Additional verification here. */
265 if (memcmp("PK\003\004", p, 4) == 0) {
266 skip = p - (const char *)h;
267 (a->decompressor->consume)(a, skip);
272 case '\003': p += 1; break;
273 case 'K': p += 2; break;
274 case 'P': p += 3; break;
275 default: p += 4; break;
278 skip = p - (const char *)h;
279 (a->decompressor->consume)(a, skip);
284 archive_read_format_zip_read_header(struct archive_read *a,
285 struct archive_entry *entry)
288 const char *signature;
290 int r = ARCHIVE_OK, r1;
292 a->archive.archive_format = ARCHIVE_FORMAT_ZIP;
293 if (a->archive.archive_format_name == NULL)
294 a->archive.archive_format_name = "ZIP";
296 zip = (struct zip *)(a->format->data);
297 zip->decompress_init = 0;
298 zip->end_of_entry = 0;
299 zip->end_of_entry_cleanup = 0;
300 zip->entry_uncompressed_bytes_read = 0;
301 zip->entry_compressed_bytes_read = 0;
302 if ((h = __archive_read_ahead(a, 4)) == NULL)
303 return (ARCHIVE_FATAL);
305 signature = (const char *)h;
306 if (signature[0] == 'M' && signature[1] == 'Z') {
307 /* This is an executable? Must be self-extracting... */
309 if (r < ARCHIVE_WARN)
311 if ((h = __archive_read_ahead(a, 4)) == NULL)
312 return (ARCHIVE_FATAL);
313 signature = (const char *)h;
316 if (signature[0] != 'P' || signature[1] != 'K') {
317 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
319 return (ARCHIVE_FATAL);
323 * "PK00" signature is used for "split" archives that
324 * only have a single segment. This means we can just
325 * skip the PK00; the first real file header should follow.
327 if (signature[2] == '0' && signature[3] == '0') {
328 (a->decompressor->consume)(a, 4);
329 if ((h = __archive_read_ahead(a, 4)) == NULL)
330 return (ARCHIVE_FATAL);
331 signature = (const char *)h;
332 if (signature[0] != 'P' || signature[1] != 'K') {
333 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
335 return (ARCHIVE_FATAL);
339 if (signature[2] == '\001' && signature[3] == '\002') {
340 /* Beginning of central directory. */
341 return (ARCHIVE_EOF);
344 if (signature[2] == '\003' && signature[3] == '\004') {
345 /* Regular file entry. */
346 r1 = zip_read_file_header(a, entry, zip);
347 if (r1 != ARCHIVE_OK)
352 if (signature[2] == '\005' && signature[3] == '\006') {
353 /* End-of-archive record. */
354 return (ARCHIVE_EOF);
357 if (signature[2] == '\007' && signature[3] == '\010') {
359 * We should never encounter this record here;
360 * see ZIP_LENGTH_AT_END handling below for details.
362 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
363 "Bad ZIP file: Unexpected end-of-entry record");
364 return (ARCHIVE_FATAL);
367 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
368 "Damaged ZIP file or unsupported format variant (%d,%d)",
369 signature[2], signature[3]);
370 return (ARCHIVE_FATAL);
374 zip_read_file_header(struct archive_read *a, struct archive_entry *entry,
377 const struct zip_file_header *p;
380 if ((p = __archive_read_ahead(a, sizeof *p)) == NULL) {
381 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
382 "Truncated ZIP file header");
383 return (ARCHIVE_FATAL);
386 zip->version = p->version[0];
387 zip->system = p->version[1];
388 zip->flags = archive_le16dec(p->flags);
389 zip->compression = archive_le16dec(p->compression);
390 if (zip->compression <
391 sizeof(compression_names)/sizeof(compression_names[0]))
392 zip->compression_name = compression_names[zip->compression];
394 zip->compression_name = "??";
395 zip->mtime = zip_time(p->timedate);
401 zip->crc32 = archive_le32dec(p->crc32);
402 zip->filename_length = archive_le16dec(p->filename_length);
403 zip->extra_length = archive_le16dec(p->extra_length);
404 zip->uncompressed_size = archive_le32dec(p->uncompressed_size);
405 zip->compressed_size = archive_le32dec(p->compressed_size);
407 (a->decompressor->consume)(a, sizeof(struct zip_file_header));
410 /* Read the filename. */
411 if ((h = __archive_read_ahead(a, zip->filename_length)) == NULL) {
412 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
413 "Truncated ZIP file header");
414 return (ARCHIVE_FATAL);
416 if (archive_string_ensure(&zip->pathname, zip->filename_length) == NULL)
417 __archive_errx(1, "Out of memory");
418 archive_strncpy(&zip->pathname, h, zip->filename_length);
419 (a->decompressor->consume)(a, zip->filename_length);
420 archive_entry_set_pathname(entry, zip->pathname.s);
422 if (zip->pathname.s[archive_strlen(&zip->pathname) - 1] == '/')
423 zip->mode = AE_IFDIR | 0777;
425 zip->mode = AE_IFREG | 0777;
427 /* Read the extra data. */
428 if ((h = __archive_read_ahead(a, zip->extra_length)) == NULL) {
429 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
430 "Truncated ZIP file header");
431 return (ARCHIVE_FATAL);
433 process_extra(h, zip);
434 (a->decompressor->consume)(a, zip->extra_length);
436 /* Populate some additional entry fields: */
437 archive_entry_set_mode(entry, zip->mode);
438 archive_entry_set_uid(entry, zip->uid);
439 archive_entry_set_gid(entry, zip->gid);
440 archive_entry_set_mtime(entry, zip->mtime, 0);
441 archive_entry_set_ctime(entry, zip->ctime, 0);
442 archive_entry_set_atime(entry, zip->atime, 0);
443 archive_entry_set_size(entry, zip->uncompressed_size);
445 zip->entry_bytes_remaining = zip->compressed_size;
446 zip->entry_offset = 0;
448 /* If there's no body, force read_data() to return EOF immediately. */
449 if (0 == (zip->flags & ZIP_LENGTH_AT_END)
450 && zip->entry_bytes_remaining < 1)
451 zip->end_of_entry = 1;
453 /* Set up a more descriptive format name. */
454 sprintf(zip->format_name, "ZIP %d.%d (%s)",
455 zip->version / 10, zip->version % 10,
456 zip->compression_name);
457 a->archive.archive_format_name = zip->format_name;
462 /* Convert an MSDOS-style date/time into Unix-style time. */
464 zip_time(const char *p)
469 msTime = (0xff & (unsigned)p[0]) + 256 * (0xff & (unsigned)p[1]);
470 msDate = (0xff & (unsigned)p[2]) + 256 * (0xff & (unsigned)p[3]);
472 memset(&ts, 0, sizeof(ts));
473 ts.tm_year = ((msDate >> 9) & 0x7f) + 80; /* Years since 1900. */
474 ts.tm_mon = ((msDate >> 5) & 0x0f) - 1; /* Month number. */
475 ts.tm_mday = msDate & 0x1f; /* Day of month. */
476 ts.tm_hour = (msTime >> 11) & 0x1f;
477 ts.tm_min = (msTime >> 5) & 0x3f;
478 ts.tm_sec = (msTime << 1) & 0x3e;
484 archive_read_format_zip_read_data(struct archive_read *a,
485 const void **buff, size_t *size, off_t *offset)
490 zip = (struct zip *)(a->format->data);
493 * If we hit end-of-entry last time, clean up and return
494 * ARCHIVE_EOF this time.
496 if (zip->end_of_entry) {
497 if (!zip->end_of_entry_cleanup) {
498 if (zip->flags & ZIP_LENGTH_AT_END) {
501 if ((p = __archive_read_ahead(a, 16)) == NULL) {
502 archive_set_error(&a->archive,
503 ARCHIVE_ERRNO_FILE_FORMAT,
504 "Truncated ZIP end-of-file record");
505 return (ARCHIVE_FATAL);
507 zip->crc32 = archive_le32dec(p + 4);
508 zip->compressed_size = archive_le32dec(p + 8);
509 zip->uncompressed_size = archive_le32dec(p + 12);
510 (a->decompressor->consume)(a, 16);
513 /* Check file size, CRC against these values. */
514 if (zip->compressed_size != zip->entry_compressed_bytes_read) {
515 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
516 "ZIP compressed data is wrong size");
517 return (ARCHIVE_WARN);
519 /* Size field only stores the lower 32 bits of the actual size. */
520 if ((zip->uncompressed_size & UINT32_MAX)
521 != (zip->entry_uncompressed_bytes_read & UINT32_MAX)) {
522 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
523 "ZIP uncompressed data is wrong size");
524 return (ARCHIVE_WARN);
526 /* TODO: Compute CRC. */
528 if (zip->crc32 != zip->entry_crc32_calculated) {
529 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
530 "ZIP data CRC error");
531 return (ARCHIVE_WARN);
534 /* End-of-entry cleanup done. */
535 zip->end_of_entry_cleanup = 1;
537 *offset = zip->entry_uncompressed_bytes_read;
540 return (ARCHIVE_EOF);
543 switch(zip->compression) {
544 case 0: /* No compression. */
545 r = zip_read_data_none(a, buff, size, offset);
547 case 8: /* Deflate compression. */
548 r = zip_read_data_deflate(a, buff, size, offset);
550 default: /* Unsupported compression. */
554 /* Return a warning. */
555 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
556 "Unsupported ZIP compression method (%s)",
557 zip->compression_name);
558 if (zip->flags & ZIP_LENGTH_AT_END) {
560 * ZIP_LENGTH_AT_END requires us to
561 * decompress the entry in order to
562 * skip it, but we don't know this
563 * compression method, so we give up.
567 /* We know compressed size; just skip it. */
568 archive_read_format_zip_read_data_skip(a);
577 * Read "uncompressed" data. According to the current specification,
578 * if ZIP_LENGTH_AT_END is specified, then the size fields in the
579 * initial file header are supposed to be set to zero. This would, of
580 * course, make it impossible for us to read the archive, since we
581 * couldn't determine the end of the file data. Info-ZIP seems to
582 * include the real size fields both before and after the data in this
583 * case (the CRC only appears afterwards), so this works as you would
586 * Returns ARCHIVE_OK if successful, ARCHIVE_FATAL otherwise, sets
587 * zip->end_of_entry if it consumes all of the data.
590 zip_read_data_none(struct archive_read *a, const void **buff,
591 size_t *size, off_t *offset)
596 zip = (struct zip *)(a->format->data);
598 if (zip->entry_bytes_remaining == 0) {
601 *offset = zip->entry_offset;
602 zip->end_of_entry = 1;
606 * Note: '1' here is a performance optimization.
607 * Recall that the decompression layer returns a count of
608 * available bytes; asking for more than that forces the
609 * decompressor to combine reads by copying data.
611 bytes_avail = (a->decompressor->read_ahead)(a, buff, 1);
612 if (bytes_avail <= 0) {
613 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
614 "Truncated ZIP file data");
615 return (ARCHIVE_FATAL);
617 if (bytes_avail > zip->entry_bytes_remaining)
618 bytes_avail = zip->entry_bytes_remaining;
619 (a->decompressor->consume)(a, bytes_avail);
621 *offset = zip->entry_offset;
622 zip->entry_offset += *size;
623 zip->entry_bytes_remaining -= *size;
624 zip->entry_uncompressed_bytes_read += *size;
625 zip->entry_compressed_bytes_read += *size;
631 zip_read_data_deflate(struct archive_read *a, const void **buff,
632 size_t *size, off_t *offset)
636 const void *compressed_buff;
639 zip = (struct zip *)(a->format->data);
641 /* If the buffer hasn't been allocated, allocate it now. */
642 if (zip->uncompressed_buffer == NULL) {
643 zip->uncompressed_buffer_size = 32 * 1024;
644 zip->uncompressed_buffer
645 = (unsigned char *)malloc(zip->uncompressed_buffer_size);
646 if (zip->uncompressed_buffer == NULL) {
647 archive_set_error(&a->archive, ENOMEM,
648 "No memory for ZIP decompression");
649 return (ARCHIVE_FATAL);
653 /* If we haven't yet read any data, initialize the decompressor. */
654 if (!zip->decompress_init) {
655 if (zip->stream_valid)
656 r = inflateReset(&zip->stream);
658 r = inflateInit2(&zip->stream,
659 -15 /* Don't check for zlib header */);
661 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
662 "Can't initialize ZIP decompression.");
663 return (ARCHIVE_FATAL);
665 /* Stream structure has been set up. */
666 zip->stream_valid = 1;
667 /* We've initialized decompression for this stream. */
668 zip->decompress_init = 1;
672 * Note: '1' here is a performance optimization.
673 * Recall that the decompression layer returns a count of
674 * available bytes; asking for more than that forces the
675 * decompressor to combine reads by copying data.
677 bytes_avail = (a->decompressor->read_ahead)(a, &compressed_buff, 1);
678 if (bytes_avail <= 0) {
679 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
680 "Truncated ZIP file body");
681 return (ARCHIVE_FATAL);
685 * A bug in zlib.h: stream.next_in should be marked 'const'
686 * but isn't (the library never alters data through the
687 * next_in pointer, only reads it). The result: this ugly
688 * cast to remove 'const'.
690 zip->stream.next_in = (Bytef *)(uintptr_t)(const void *)compressed_buff;
691 zip->stream.avail_in = bytes_avail;
692 zip->stream.total_in = 0;
693 zip->stream.next_out = zip->uncompressed_buffer;
694 zip->stream.avail_out = zip->uncompressed_buffer_size;
695 zip->stream.total_out = 0;
697 r = inflate(&zip->stream, 0);
702 zip->end_of_entry = 1;
705 archive_set_error(&a->archive, ENOMEM,
706 "Out of memory for ZIP decompression");
707 return (ARCHIVE_FATAL);
709 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
710 "ZIP decompression failed (%d)", r);
711 return (ARCHIVE_FATAL);
714 /* Consume as much as the compressor actually used. */
715 bytes_avail = zip->stream.total_in;
716 (a->decompressor->consume)(a, bytes_avail);
717 zip->entry_bytes_remaining -= bytes_avail;
718 zip->entry_compressed_bytes_read += bytes_avail;
720 *offset = zip->entry_offset;
721 *size = zip->stream.total_out;
722 zip->entry_uncompressed_bytes_read += *size;
723 *buff = zip->uncompressed_buffer;
724 zip->entry_offset += *size;
729 zip_read_data_deflate(struct archive_read *a, const void **buff,
730 size_t *size, off_t *offset)
735 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
736 "libarchive compiled without deflate support (no libz)");
737 return (ARCHIVE_FATAL);
742 archive_read_format_zip_read_data_skip(struct archive_read *a)
745 const void *buff = NULL;
748 zip = (struct zip *)(a->format->data);
751 * If the length is at the end, we have no choice but
752 * to decompress all the data to find the end marker.
754 if (zip->flags & ZIP_LENGTH_AT_END) {
759 r = archive_read_format_zip_read_data(a, &buff,
761 } while (r == ARCHIVE_OK);
766 * If the length is at the beginning, we can skip the
767 * compressed data much more quickly.
769 while (zip->entry_bytes_remaining > 0) {
770 bytes_avail = (a->decompressor->read_ahead)(a, &buff, 1);
771 if (bytes_avail <= 0) {
772 archive_set_error(&a->archive,
773 ARCHIVE_ERRNO_FILE_FORMAT,
774 "Truncated ZIP file body");
775 return (ARCHIVE_FATAL);
777 if (bytes_avail > zip->entry_bytes_remaining)
778 bytes_avail = zip->entry_bytes_remaining;
779 (a->decompressor->consume)(a, bytes_avail);
780 zip->entry_bytes_remaining -= bytes_avail;
782 /* This entry is finished and done. */
783 zip->end_of_entry_cleanup = zip->end_of_entry = 1;
788 archive_read_format_zip_cleanup(struct archive_read *a)
792 zip = (struct zip *)(a->format->data);
794 if (zip->stream_valid)
795 inflateEnd(&zip->stream);
797 free(zip->uncompressed_buffer);
798 archive_string_free(&(zip->pathname));
799 archive_string_free(&(zip->extra));
801 (a->format->data) = NULL;
806 * The extra data is stored as a list of
807 * id1+size1+data1 + id2+size2+data2 ...
808 * triplets. id and size are 2 bytes each.
811 process_extra(const void* extra, struct zip* zip)
814 const char *p = (const char *)extra;
815 while (offset < zip->extra_length - 4)
817 unsigned short headerid = archive_le16dec(p + offset);
818 unsigned short datasize = archive_le16dec(p + offset + 2);
820 if (offset + datasize > zip->extra_length)
823 fprintf(stderr, "Header id 0x%04x, length %d\n",
828 /* Zip64 extended information extra field. */
830 zip->uncompressed_size = archive_le64dec(p + offset);
832 zip->compressed_size = archive_le64dec(p + offset + 8);
836 /* Extended time field "UT". */
837 int flags = p[offset];
840 /* Flag bits indicate which dates are present. */
844 fprintf(stderr, "mtime: %lld -> %d\n",
845 (long long)zip->mtime,
846 archive_le32dec(p + offset));
850 zip->mtime = archive_le32dec(p + offset);
858 zip->atime = archive_le32dec(p + offset);
866 zip->ctime = archive_le32dec(p + offset);
873 /* Info-ZIP Unix Extra Field (type 2) "Ux". */
875 fprintf(stderr, "uid %d gid %d\n",
876 archive_le16dec(p + offset),
877 archive_le16dec(p + offset + 2));
880 zip->uid = archive_le16dec(p + offset);
882 zip->gid = archive_le16dec(p + offset + 2);
890 if (offset != zip->extra_length)
893 "Extra data field contents do not match reported size!");