2 * Copyright (c) 2004-2013 Tim Kientzle
3 * Copyright (c) 2011-2012,2014 Michihiro NAKAJIMA
4 * Copyright (c) 2013 Konrad Kleine
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
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.
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.
28 #include "archive_platform.h"
29 __FBSDID("$FreeBSD: head/lib/libarchive/archive_read_support_format_zip.c 201102 2009-12-28 03:11:36Z kientzle $");
32 * The definitive documentation of the Zip file format is:
33 * http://www.pkware.com/documents/casestudies/APPNOTE.TXT
35 * The Info-Zip project has pioneered various extensions to better
36 * support Zip on Unix, including the 0x5455 "UT", 0x5855 "UX", 0x7855
37 * "Ux", and 0x7875 "ux" extensions for time and ownership
40 * History of this code: The streaming Zip reader was first added to
41 * libarchive in January 2005. Support for seekable input sources was
42 * added in Nov 2011. Zip64 support (including a significant code
43 * refactoring) was added in 2014.
57 #include "archive_digest_private.h"
58 #include "archive_cryptor_private.h"
59 #include "archive_endian.h"
60 #include "archive_entry.h"
61 #include "archive_entry_locale.h"
62 #include "archive_hmac_private.h"
63 #include "archive_private.h"
64 #include "archive_rb.h"
65 #include "archive_read_private.h"
68 #include "archive_crc32.h"
72 struct archive_rb_node node;
73 struct zip_entry *next;
74 int64_t local_header_offset;
75 int64_t compressed_size;
76 int64_t uncompressed_size;
79 struct archive_string rsrcname;
85 uint16_t zip_flags; /* From GP Flags Field */
86 unsigned char compression;
87 unsigned char system; /* From "version written by" */
88 unsigned char flags; /* Our extra markers. */
89 unsigned char decdat;/* Used for Decryption check */
91 /* WinZip AES encryption extra field should be available
92 * when compression is 99. */
94 /* Vendor version: AE-1 - 0x0001, AE-2 - 0x0002 */
96 #define AES_VENDOR_AE_1 0x0001
97 #define AES_VENDOR_AE_2 0x0002
98 /* AES encryption strength:
99 * 1 - 128 bits, 2 - 192 bits, 2 - 256 bits. */
101 /* Actual compression method. */
102 unsigned char compression;
106 struct trad_enc_ctx {
110 /* Bits used in zip_flags. */
111 #define ZIP_ENCRYPTED (1 << 0)
112 #define ZIP_LENGTH_AT_END (1 << 3)
113 #define ZIP_STRONG_ENCRYPTED (1 << 6)
114 #define ZIP_UTF8_NAME (1 << 11)
115 /* See "7.2 Single Password Symmetric Encryption Method"
116 in http://www.pkware.com/documents/casestudies/APPNOTE.TXT */
117 #define ZIP_CENTRAL_DIRECTORY_ENCRYPTED (1 << 13)
119 /* Bits used in flags. */
120 #define LA_USED_ZIP64 (1 << 0)
121 #define LA_FROM_CENTRAL_DIRECTORY (1 << 1)
124 * See "WinZip - AES Encryption Information"
125 * http://www.winzip.com/aes_info.htm
127 /* Value used in compression method. */
128 #define WINZIP_AES_ENCRYPTION 99
129 /* Authentication code size. */
130 #define AUTH_CODE_SIZE 10
132 #define MAX_DERIVED_KEY_BUF_SIZE (AES_MAX_KEY_SIZE * 2 + 2)
135 /* Structural information about the archive. */
136 struct archive_string format_name;
137 int64_t central_directory_offset;
138 size_t central_directory_entries_total;
139 size_t central_directory_entries_on_this_disk;
140 int has_encrypted_entries;
142 /* List of entries (seekable Zip only) */
143 struct zip_entry *zip_entries;
144 struct archive_rb_tree tree;
145 struct archive_rb_tree tree_rsrc;
147 /* Bytes read but not yet consumed via __archive_read_consume() */
150 /* Information about entry we're currently reading. */
151 struct zip_entry *entry;
152 int64_t entry_bytes_remaining;
154 /* These count the number of bytes actually read for the entry. */
155 int64_t entry_compressed_bytes_read;
156 int64_t entry_uncompressed_bytes_read;
158 /* Running CRC32 of the decompressed data */
159 unsigned long entry_crc32;
160 unsigned long (*crc32func)(unsigned long, const void *,
164 /* Flags to mark progress of decompression. */
165 char decompress_init;
169 unsigned char *uncompressed_buffer;
170 size_t uncompressed_buffer_size;
175 struct archive_string_conv *sconv;
176 struct archive_string_conv *sconv_default;
177 struct archive_string_conv *sconv_utf8;
178 int init_default_conversion;
179 int process_mac_extensions;
181 char init_decryption;
183 /* Decryption buffer. */
185 * The decrypted data starts at decrypted_ptr and
186 * extends for decrypted_bytes_remaining. Decryption
187 * adds new data to the end of this block, data is returned
188 * to clients from the beginning. When the block hits the
189 * end of decrypted_buffer, it has to be shuffled back to
190 * the beginning of the buffer.
192 unsigned char *decrypted_buffer;
193 unsigned char *decrypted_ptr;
194 size_t decrypted_buffer_size;
195 size_t decrypted_bytes_remaining;
196 size_t decrypted_unconsumed_bytes;
198 /* Traditional PKWARE decryption. */
199 struct trad_enc_ctx tctx;
202 /* WinZip AES decryption. */
203 /* Contexts used for AES decryption. */
204 archive_crypto_ctx cctx;
206 archive_hmac_sha1_ctx hctx;
209 /* Strong encryption's decryption header information. */
222 /* Many systems define min or MIN, but not all. */
223 #define zipmin(a,b) ((a) < (b) ? (a) : (b))
225 /* ------------------------------------------------------------------------ */
228 Traditional PKWARE Decryption functions.
232 trad_enc_update_keys(struct trad_enc_ctx *ctx, uint8_t c)
235 #define CRC32(c, b) (crc32(c ^ 0xffffffffUL, &b, 1) ^ 0xffffffffUL)
237 ctx->keys[0] = CRC32(ctx->keys[0], c);
238 ctx->keys[1] = (ctx->keys[1] + (ctx->keys[0] & 0xff)) * 134775813L + 1;
239 t = (ctx->keys[1] >> 24) & 0xff;
240 ctx->keys[2] = CRC32(ctx->keys[2], t);
245 trad_enc_decrypt_byte(struct trad_enc_ctx *ctx)
247 unsigned temp = ctx->keys[2] | 2;
248 return (uint8_t)((temp * (temp ^ 1)) >> 8) & 0xff;
252 trad_enc_decrypt_update(struct trad_enc_ctx *ctx, const uint8_t *in,
253 size_t in_len, uint8_t *out, size_t out_len)
257 max = (unsigned)((in_len < out_len)? in_len: out_len);
259 for (i = 0; i < max; i++) {
260 uint8_t t = in[i] ^ trad_enc_decrypt_byte(ctx);
262 trad_enc_update_keys(ctx, t);
267 trad_enc_init(struct trad_enc_ctx *ctx, const char *pw, size_t pw_len,
268 const uint8_t *key, size_t key_len, uint8_t *crcchk)
277 ctx->keys[0] = 305419896L;
278 ctx->keys[1] = 591751049L;
279 ctx->keys[2] = 878082192L;
281 for (;pw_len; --pw_len)
282 trad_enc_update_keys(ctx, *pw++);
284 trad_enc_decrypt_update(ctx, key, 12, header, 12);
285 /* Return the last byte for CRC check. */
286 *crcchk = header[11];
292 crypt_derive_key_sha1(const void *p, int size, unsigned char *key,
296 archive_sha1_ctx ctx;
297 unsigned char md1[MD_SIZE];
298 unsigned char md2[MD_SIZE * 2];
299 unsigned char mkb[64];
302 archive_sha1_init(&ctx);
303 archive_sha1_update(&ctx, p, size);
304 archive_sha1_final(&ctx, md1);
306 memset(mkb, 0x36, sizeof(mkb));
307 for (i = 0; i < MD_SIZE; i++)
309 archive_sha1_init(&ctx);
310 archive_sha1_update(&ctx, mkb, sizeof(mkb));
311 archive_sha1_final(&ctx, md2);
313 memset(mkb, 0x5C, sizeof(mkb));
314 for (i = 0; i < MD_SIZE; i++)
316 archive_sha1_init(&ctx);
317 archive_sha1_update(&ctx, mkb, sizeof(mkb));
318 archive_sha1_final(&ctx, md2 + MD_SIZE);
322 memcpy(key, md2, key_size);
328 * Common code for streaming or seeking modes.
330 * Includes code to read local file headers, decompress data
331 * from entry bodies, and common API.
335 real_crc32(unsigned long crc, const void *buff, size_t len)
337 return crc32(crc, buff, (unsigned int)len);
340 /* Used by "ignorecrc32" option to speed up tests. */
342 fake_crc32(unsigned long crc, const void *buff, size_t len)
344 (void)crc; /* UNUSED */
345 (void)buff; /* UNUSED */
346 (void)len; /* UNUSED */
350 static const struct {
353 } compression_methods[] = {
354 {0, "uncompressed"}, /* The file is stored (no compression) */
355 {1, "shrinking"}, /* The file is Shrunk */
356 {2, "reduced-1"}, /* The file is Reduced with compression factor 1 */
357 {3, "reduced-2"}, /* The file is Reduced with compression factor 2 */
358 {4, "reduced-3"}, /* The file is Reduced with compression factor 3 */
359 {5, "reduced-4"}, /* The file is Reduced with compression factor 4 */
360 {6, "imploded"}, /* The file is Imploded */
361 {7, "reserved"}, /* Reserved for Tokenizing compression algorithm */
362 {8, "deflation"}, /* The file is Deflated */
363 {9, "deflation-64-bit"}, /* Enhanced Deflating using Deflate64(tm) */
364 {10, "ibm-terse"},/* PKWARE Data Compression Library Imploding
366 {11, "reserved"}, /* Reserved by PKWARE */
367 {12, "bzip"}, /* File is compressed using BZIP2 algorithm */
368 {13, "reserved"}, /* Reserved by PKWARE */
369 {14, "lzma"}, /* LZMA (EFS) */
370 {15, "reserved"}, /* Reserved by PKWARE */
371 {16, "reserved"}, /* Reserved by PKWARE */
372 {17, "reserved"}, /* Reserved by PKWARE */
373 {18, "ibm-terse-new"}, /* File is compressed using IBM TERSE (new) */
374 {19, "ibm-lz777"},/* IBM LZ77 z Architecture (PFS) */
375 {97, "wav-pack"}, /* WavPack compressed data */
376 {98, "ppmd-1"}, /* PPMd version I, Rev 1 */
377 {99, "aes"} /* WinZip AES encryption */
381 compression_name(const int compression)
383 static const int num_compression_methods =
384 sizeof(compression_methods)/sizeof(compression_methods[0]);
387 while(compression >= 0 && i < num_compression_methods) {
388 if (compression_methods[i].id == compression)
389 return compression_methods[i].name;
395 /* Convert an MSDOS-style date/time into Unix-style time. */
397 zip_time(const char *p)
402 msTime = (0xff & (unsigned)p[0]) + 256 * (0xff & (unsigned)p[1]);
403 msDate = (0xff & (unsigned)p[2]) + 256 * (0xff & (unsigned)p[3]);
405 memset(&ts, 0, sizeof(ts));
406 ts.tm_year = ((msDate >> 9) & 0x7f) + 80; /* Years since 1900. */
407 ts.tm_mon = ((msDate >> 5) & 0x0f) - 1; /* Month number. */
408 ts.tm_mday = msDate & 0x1f; /* Day of month. */
409 ts.tm_hour = (msTime >> 11) & 0x1f;
410 ts.tm_min = (msTime >> 5) & 0x3f;
411 ts.tm_sec = (msTime << 1) & 0x3e;
417 * The extra data is stored as a list of
418 * id1+size1+data1 + id2+size2+data2 ...
419 * triplets. id and size are 2 bytes each.
422 process_extra(struct archive_read *a, const char *p, size_t extra_length, struct zip_entry* zip_entry)
426 if (extra_length == 0) {
430 if (extra_length < 4) {
431 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
432 "Too-small extra data: Need at least 4 bytes, but only found %d bytes", (int)extra_length);
433 return ARCHIVE_FAILED;
435 while (offset <= extra_length - 4) {
436 unsigned short headerid = archive_le16dec(p + offset);
437 unsigned short datasize = archive_le16dec(p + offset + 2);
440 if (offset + datasize > extra_length) {
441 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
442 "Extra data overflow: Need %d bytes but only found %d bytes",
443 (int)datasize, (int)(extra_length - offset));
444 return ARCHIVE_FAILED;
447 fprintf(stderr, "Header id 0x%04x, length %d\n",
452 /* Zip64 extended information extra field. */
453 zip_entry->flags |= LA_USED_ZIP64;
454 if (zip_entry->uncompressed_size == 0xffffffff) {
457 || (t = archive_le64dec(p + offset)) > INT64_MAX) {
458 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
459 "Malformed 64-bit uncompressed size");
460 return ARCHIVE_FAILED;
462 zip_entry->uncompressed_size = t;
466 if (zip_entry->compressed_size == 0xffffffff) {
469 || (t = archive_le64dec(p + offset)) > INT64_MAX) {
470 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
471 "Malformed 64-bit compressed size");
472 return ARCHIVE_FAILED;
474 zip_entry->compressed_size = t;
478 if (zip_entry->local_header_offset == 0xffffffff) {
481 || (t = archive_le64dec(p + offset)) > INT64_MAX) {
482 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
483 "Malformed 64-bit local header offset");
484 return ARCHIVE_FAILED;
486 zip_entry->local_header_offset = t;
490 /* archive_le32dec(p + offset) gives disk
491 * on which file starts, but we don't handle
492 * multi-volume Zip files. */
497 /* Strong encryption field. */
498 if (archive_le16dec(p + offset) == 2) {
500 archive_le16dec(p + offset + 2);
502 archive_le16dec(p + offset + 4);
504 archive_le16dec(p + offset + 6);
505 fprintf(stderr, "algId=0x%04x, bitLen=%u, "
506 "flgas=%d\n", algId, bitLen,flags);
513 /* Extended time field "UT". */
516 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
517 "Incomplete extended time field");
518 return ARCHIVE_FAILED;
523 /* Flag bits indicate which dates are present. */
527 fprintf(stderr, "mtime: %lld -> %d\n",
528 (long long)zip_entry->mtime,
529 archive_le32dec(p + offset));
533 zip_entry->mtime = archive_le32dec(p + offset);
541 zip_entry->atime = archive_le32dec(p + offset);
549 zip_entry->ctime = archive_le32dec(p + offset);
557 /* Info-ZIP Unix Extra Field (old version) "UX". */
559 zip_entry->atime = archive_le32dec(p + offset);
561 archive_le32dec(p + offset + 4);
563 if (datasize >= 12) {
565 archive_le16dec(p + offset + 8);
567 archive_le16dec(p + offset + 10);
573 /* Experimental 'xl' field */
575 * Introduced Dec 2013 to provide a way to
576 * include external file attributes (and other
577 * fields that ordinarily appear only in
578 * central directory) in local file header.
579 * This provides file type and permission
580 * information necessary to support full
581 * streaming extraction. Currently being
582 * discussed with other Zip developers
583 * ... subject to change.
586 * The field starts with a bitmap that specifies
587 * which additional fields are included. The
588 * bitmap is variable length and can be extended in
591 * n bytes - feature bitmap: first byte has low-order
592 * 7 bits. If high-order bit is set, a subsequent
593 * byte holds the next 7 bits, etc.
595 * if bitmap & 1, 2 byte "version made by"
596 * if bitmap & 2, 2 byte "internal file attributes"
597 * if bitmap & 4, 4 byte "external file attributes"
598 * if bitmap & 8, 2 byte comment length + n byte comment
600 int bitmap, bitmap_last;
604 bitmap_last = bitmap = 0xff & p[offset];
608 /* We only support first 7 bits of bitmap; skip rest. */
609 while ((bitmap_last & 0x80) != 0
611 bitmap_last = p[offset];
617 /* 2 byte "version made by" */
621 = archive_le16dec(p + offset) >> 8;
626 /* 2 byte "internal file attributes" */
627 uint32_t internal_attributes;
631 = archive_le16dec(p + offset);
632 /* Not used by libarchive at present. */
633 (void)internal_attributes; /* UNUSED */
638 /* 4 byte "external file attributes" */
639 uint32_t external_attributes;
643 = archive_le32dec(p + offset);
644 if (zip_entry->system == 3) {
646 = external_attributes >> 16;
647 } else if (zip_entry->system == 0) {
648 // Interpret MSDOS directory bit
649 if (0x10 == (external_attributes & 0x10)) {
650 zip_entry->mode = AE_IFDIR | 0775;
652 zip_entry->mode = AE_IFREG | 0664;
654 if (0x01 == (external_attributes & 0x01)) {
655 // Read-only bit; strip write permissions
656 zip_entry->mode &= 0555;
665 /* 2 byte comment length + comment */
666 uint32_t comment_length;
670 = archive_le16dec(p + offset);
674 if (datasize < comment_length)
676 /* Comment is not supported by libarchive */
677 offset += comment_length;
678 datasize -= comment_length;
683 /* Info-ZIP Unix Extra Field (type 2) "Ux". */
685 fprintf(stderr, "uid %d gid %d\n",
686 archive_le16dec(p + offset),
687 archive_le16dec(p + offset + 2));
690 zip_entry->uid = archive_le16dec(p + offset);
693 archive_le16dec(p + offset + 2);
697 /* Info-Zip Unix Extra Field (type 3) "ux". */
698 int uidsize = 0, gidsize = 0;
700 /* TODO: support arbitrary uidsize/gidsize. */
701 if (datasize >= 1 && p[offset] == 1) {/* version=1 */
703 /* get a uid size. */
704 uidsize = 0xff & (int)p[offset+1];
709 else if (uidsize == 4 && datasize >= 6)
714 if (datasize >= (2 + uidsize + 3)) {
715 /* get a gid size. */
716 gidsize = 0xff & (int)p[offset+2+uidsize];
720 p+offset+2+uidsize+1);
721 else if (gidsize == 4 &&
722 datasize >= (2 + uidsize + 5))
725 p+offset+2+uidsize+1);
731 /* WinZip AES extra data field. */
733 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
734 "Incomplete AES field");
735 return ARCHIVE_FAILED;
737 if (p[offset + 2] == 'A' && p[offset + 3] == 'E') {
738 /* Vendor version. */
739 zip_entry->aes_extra.vendor =
740 archive_le16dec(p + offset);
741 /* AES encryption strength. */
742 zip_entry->aes_extra.strength = p[offset + 4];
743 /* Actual compression method. */
744 zip_entry->aes_extra.compression =
753 if (offset != extra_length) {
754 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
755 "Malformed extra data: Consumed %d bytes of %d bytes",
756 (int)offset, (int)extra_length);
757 return ARCHIVE_FAILED;
763 * Assumes file pointer is at beginning of local file header.
766 zip_read_local_file_header(struct archive_read *a, struct archive_entry *entry,
773 size_t len, filename_length, extra_length;
774 struct archive_string_conv *sconv;
775 struct zip_entry *zip_entry = zip->entry;
776 struct zip_entry zip_entry_central_dir;
777 int ret = ARCHIVE_OK;
780 /* Save a copy of the original for consistency checks. */
781 zip_entry_central_dir = *zip_entry;
783 zip->decompress_init = 0;
784 zip->end_of_entry = 0;
785 zip->entry_uncompressed_bytes_read = 0;
786 zip->entry_compressed_bytes_read = 0;
787 zip->entry_crc32 = zip->crc32func(0, NULL, 0);
789 /* Setup default conversion. */
790 if (zip->sconv == NULL && !zip->init_default_conversion) {
792 archive_string_default_conversion_for_read(&(a->archive));
793 zip->init_default_conversion = 1;
796 if ((p = __archive_read_ahead(a, 30, NULL)) == NULL) {
797 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
798 "Truncated ZIP file header");
799 return (ARCHIVE_FATAL);
802 if (memcmp(p, "PK\003\004", 4) != 0) {
803 archive_set_error(&a->archive, -1, "Damaged Zip archive");
804 return ARCHIVE_FATAL;
807 zip_entry->system = p[5];
808 zip_entry->zip_flags = archive_le16dec(p + 6);
809 if (zip_entry->zip_flags & (ZIP_ENCRYPTED | ZIP_STRONG_ENCRYPTED)) {
810 zip->has_encrypted_entries = 1;
811 archive_entry_set_is_data_encrypted(entry, 1);
812 if (zip_entry->zip_flags & ZIP_CENTRAL_DIRECTORY_ENCRYPTED &&
813 zip_entry->zip_flags & ZIP_ENCRYPTED &&
814 zip_entry->zip_flags & ZIP_STRONG_ENCRYPTED) {
815 archive_entry_set_is_metadata_encrypted(entry, 1);
816 return ARCHIVE_FATAL;
819 zip->init_decryption = (zip_entry->zip_flags & ZIP_ENCRYPTED);
820 zip_entry->compression = (char)archive_le16dec(p + 8);
821 zip_entry->mtime = zip_time(p + 10);
822 zip_entry->crc32 = archive_le32dec(p + 14);
823 if (zip_entry->zip_flags & ZIP_LENGTH_AT_END)
824 zip_entry->decdat = p[11];
826 zip_entry->decdat = p[17];
827 zip_entry->compressed_size = archive_le32dec(p + 18);
828 zip_entry->uncompressed_size = archive_le32dec(p + 22);
829 filename_length = archive_le16dec(p + 26);
830 extra_length = archive_le16dec(p + 28);
832 __archive_read_consume(a, 30);
834 /* Read the filename. */
835 if ((h = __archive_read_ahead(a, filename_length, NULL)) == NULL) {
836 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
837 "Truncated ZIP file header");
838 return (ARCHIVE_FATAL);
840 if (zip_entry->zip_flags & ZIP_UTF8_NAME) {
841 /* The filename is stored to be UTF-8. */
842 if (zip->sconv_utf8 == NULL) {
844 archive_string_conversion_from_charset(
845 &a->archive, "UTF-8", 1);
846 if (zip->sconv_utf8 == NULL)
847 return (ARCHIVE_FATAL);
849 sconv = zip->sconv_utf8;
850 } else if (zip->sconv != NULL)
853 sconv = zip->sconv_default;
855 if (archive_entry_copy_pathname_l(entry,
856 h, filename_length, sconv) != 0) {
857 if (errno == ENOMEM) {
858 archive_set_error(&a->archive, ENOMEM,
859 "Can't allocate memory for Pathname");
860 return (ARCHIVE_FATAL);
862 archive_set_error(&a->archive,
863 ARCHIVE_ERRNO_FILE_FORMAT,
864 "Pathname cannot be converted "
865 "from %s to current locale.",
866 archive_string_conversion_charset_name(sconv));
869 __archive_read_consume(a, filename_length);
871 /* Read the extra data. */
872 if ((h = __archive_read_ahead(a, extra_length, NULL)) == NULL) {
873 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
874 "Truncated ZIP file header");
875 return (ARCHIVE_FATAL);
878 if (ARCHIVE_OK != process_extra(a, h, extra_length, zip_entry)) {
879 return ARCHIVE_FATAL;
881 __archive_read_consume(a, extra_length);
883 /* Work around a bug in Info-Zip: When reading from a pipe, it
884 * stats the pipe instead of synthesizing a file entry. */
885 if ((zip_entry->mode & AE_IFMT) == AE_IFIFO) {
886 zip_entry->mode &= ~ AE_IFMT;
887 zip_entry->mode |= AE_IFREG;
890 /* If the mode is totally empty, set some sane default. */
891 if (zip_entry->mode == 0) {
892 zip_entry->mode |= 0664;
895 /* Windows archivers sometimes use backslash as the directory separator.
896 Normalize to slash. */
897 if (zip_entry->system == 0 &&
898 (wp = archive_entry_pathname_w(entry)) != NULL) {
899 if (wcschr(wp, L'/') == NULL && wcschr(wp, L'\\') != NULL) {
901 struct archive_wstring s;
902 archive_string_init(&s);
903 archive_wstrcpy(&s, wp);
904 for (i = 0; i < archive_strlen(&s); i++) {
908 archive_entry_copy_pathname_w(entry, s.s);
909 archive_wstring_free(&s);
913 /* Make sure that entries with a trailing '/' are marked as directories
914 * even if the External File Attributes contains bogus values. If this
915 * is not a directory and there is no type, assume regularfile. */
916 if ((zip_entry->mode & AE_IFMT) != AE_IFDIR) {
919 wp = archive_entry_pathname_w(entry);
922 has_slash = len > 0 && wp[len - 1] == L'/';
924 cp = archive_entry_pathname(entry);
925 len = (cp != NULL)?strlen(cp):0;
926 has_slash = len > 0 && cp[len - 1] == '/';
928 /* Correct file type as needed. */
930 zip_entry->mode &= ~AE_IFMT;
931 zip_entry->mode |= AE_IFDIR;
932 zip_entry->mode |= 0111;
933 } else if ((zip_entry->mode & AE_IFMT) == 0) {
934 zip_entry->mode |= AE_IFREG;
938 /* Make sure directories end in '/' */
939 if ((zip_entry->mode & AE_IFMT) == AE_IFDIR) {
940 wp = archive_entry_pathname_w(entry);
943 if (len > 0 && wp[len - 1] != L'/') {
944 struct archive_wstring s;
945 archive_string_init(&s);
946 archive_wstrcat(&s, wp);
947 archive_wstrappend_wchar(&s, L'/');
948 archive_entry_copy_pathname_w(entry, s.s);
949 archive_wstring_free(&s);
952 cp = archive_entry_pathname(entry);
953 len = (cp != NULL)?strlen(cp):0;
954 if (len > 0 && cp[len - 1] != '/') {
955 struct archive_string s;
956 archive_string_init(&s);
957 archive_strcat(&s, cp);
958 archive_strappend_char(&s, '/');
959 archive_entry_set_pathname(entry, s.s);
960 archive_string_free(&s);
965 if (zip_entry->flags & LA_FROM_CENTRAL_DIRECTORY) {
966 /* If this came from the central dir, it's size info
967 * is definitive, so ignore the length-at-end flag. */
968 zip_entry->zip_flags &= ~ZIP_LENGTH_AT_END;
969 /* If local header is missing a value, use the one from
970 the central directory. If both have it, warn about
972 if (zip_entry->crc32 == 0) {
973 zip_entry->crc32 = zip_entry_central_dir.crc32;
974 } else if (!zip->ignore_crc32
975 && zip_entry->crc32 != zip_entry_central_dir.crc32) {
976 archive_set_error(&a->archive,
977 ARCHIVE_ERRNO_FILE_FORMAT,
978 "Inconsistent CRC32 values");
981 if (zip_entry->compressed_size == 0) {
982 zip_entry->compressed_size
983 = zip_entry_central_dir.compressed_size;
984 } else if (zip_entry->compressed_size
985 != zip_entry_central_dir.compressed_size) {
986 archive_set_error(&a->archive,
987 ARCHIVE_ERRNO_FILE_FORMAT,
988 "Inconsistent compressed size: "
989 "%jd in central directory, %jd in local header",
990 (intmax_t)zip_entry_central_dir.compressed_size,
991 (intmax_t)zip_entry->compressed_size);
994 if (zip_entry->uncompressed_size == 0) {
995 zip_entry->uncompressed_size
996 = zip_entry_central_dir.uncompressed_size;
997 } else if (zip_entry->uncompressed_size
998 != zip_entry_central_dir.uncompressed_size) {
999 archive_set_error(&a->archive,
1000 ARCHIVE_ERRNO_FILE_FORMAT,
1001 "Inconsistent uncompressed size: "
1002 "%jd in central directory, %jd in local header",
1003 (intmax_t)zip_entry_central_dir.uncompressed_size,
1004 (intmax_t)zip_entry->uncompressed_size);
1009 /* Populate some additional entry fields: */
1010 archive_entry_set_mode(entry, zip_entry->mode);
1011 archive_entry_set_uid(entry, zip_entry->uid);
1012 archive_entry_set_gid(entry, zip_entry->gid);
1013 archive_entry_set_mtime(entry, zip_entry->mtime, 0);
1014 archive_entry_set_ctime(entry, zip_entry->ctime, 0);
1015 archive_entry_set_atime(entry, zip_entry->atime, 0);
1017 if ((zip->entry->mode & AE_IFMT) == AE_IFLNK) {
1018 size_t linkname_length;
1020 if (zip_entry->compressed_size > 64 * 1024) {
1021 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
1022 "Zip file with oversized link entry");
1023 return ARCHIVE_FATAL;
1026 linkname_length = (size_t)zip_entry->compressed_size;
1028 archive_entry_set_size(entry, 0);
1029 p = __archive_read_ahead(a, linkname_length, NULL);
1031 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
1032 "Truncated Zip file");
1033 return ARCHIVE_FATAL;
1037 if (sconv == NULL && (zip->entry->zip_flags & ZIP_UTF8_NAME))
1038 sconv = zip->sconv_utf8;
1040 sconv = zip->sconv_default;
1041 if (archive_entry_copy_symlink_l(entry, p, linkname_length,
1043 if (errno != ENOMEM && sconv == zip->sconv_utf8 &&
1044 (zip->entry->zip_flags & ZIP_UTF8_NAME))
1045 archive_entry_copy_symlink_l(entry, p,
1046 linkname_length, NULL);
1047 if (errno == ENOMEM) {
1048 archive_set_error(&a->archive, ENOMEM,
1049 "Can't allocate memory for Symlink");
1050 return (ARCHIVE_FATAL);
1053 * Since there is no character-set regulation for
1054 * symlink name, do not report the conversion error
1055 * in an automatic conversion.
1057 if (sconv != zip->sconv_utf8 ||
1058 (zip->entry->zip_flags & ZIP_UTF8_NAME) == 0) {
1059 archive_set_error(&a->archive,
1060 ARCHIVE_ERRNO_FILE_FORMAT,
1061 "Symlink cannot be converted "
1062 "from %s to current locale.",
1063 archive_string_conversion_charset_name(
1068 zip_entry->uncompressed_size = zip_entry->compressed_size = 0;
1070 if (__archive_read_consume(a, linkname_length) < 0) {
1071 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
1072 "Read error skipping symlink target name");
1073 return ARCHIVE_FATAL;
1075 } else if (0 == (zip_entry->zip_flags & ZIP_LENGTH_AT_END)
1076 || zip_entry->uncompressed_size > 0) {
1077 /* Set the size only if it's meaningful. */
1078 archive_entry_set_size(entry, zip_entry->uncompressed_size);
1080 zip->entry_bytes_remaining = zip_entry->compressed_size;
1082 /* If there's no body, force read_data() to return EOF immediately. */
1083 if (0 == (zip_entry->zip_flags & ZIP_LENGTH_AT_END)
1084 && zip->entry_bytes_remaining < 1)
1085 zip->end_of_entry = 1;
1087 /* Set up a more descriptive format name. */
1088 archive_string_empty(&zip->format_name);
1089 archive_string_sprintf(&zip->format_name, "ZIP %d.%d (%s)",
1090 version / 10, version % 10,
1091 compression_name(zip->entry->compression));
1092 a->archive.archive_format_name = zip->format_name.s;
1098 check_authentication_code(struct archive_read *a, const void *_p)
1100 struct zip *zip = (struct zip *)(a->format->data);
1102 /* Check authentication code. */
1103 if (zip->hctx_valid) {
1106 size_t hmac_len = 20;
1109 archive_hmac_sha1_final(&zip->hctx, hmac, &hmac_len);
1111 /* Read authentication code. */
1112 p = __archive_read_ahead(a, AUTH_CODE_SIZE, NULL);
1114 archive_set_error(&a->archive,
1115 ARCHIVE_ERRNO_FILE_FORMAT,
1116 "Truncated ZIP file data");
1117 return (ARCHIVE_FATAL);
1122 cmp = memcmp(hmac, p, AUTH_CODE_SIZE);
1123 __archive_read_consume(a, AUTH_CODE_SIZE);
1125 archive_set_error(&a->archive,
1127 "ZIP bad Authentication code");
1128 return (ARCHIVE_WARN);
1131 return (ARCHIVE_OK);
1135 * Read "uncompressed" data. There are three cases:
1136 * 1) We know the size of the data. This is always true for the
1137 * seeking reader (we've examined the Central Directory already).
1138 * 2) ZIP_LENGTH_AT_END was set, but only the CRC was deferred.
1139 * Info-ZIP seems to do this; we know the size but have to grab
1140 * the CRC from the data descriptor afterwards.
1141 * 3) We're streaming and ZIP_LENGTH_AT_END was specified and
1142 * we have no size information. In this case, we can do pretty
1143 * well by watching for the data descriptor record. The data
1144 * descriptor is 16 bytes and includes a computed CRC that should
1145 * provide a strong check.
1147 * TODO: Technically, the PK\007\010 signature is optional.
1148 * In the original spec, the data descriptor contained CRC
1149 * and size fields but had no leading signature. In practice,
1150 * newer writers seem to provide the signature pretty consistently.
1152 * For uncompressed data, the PK\007\010 marker seems essential
1153 * to be sure we've actually seen the end of the entry.
1155 * Returns ARCHIVE_OK if successful, ARCHIVE_FATAL otherwise, sets
1156 * zip->end_of_entry if it consumes all of the data.
1159 zip_read_data_none(struct archive_read *a, const void **_buff,
1160 size_t *size, int64_t *offset)
1164 ssize_t bytes_avail;
1167 (void)offset; /* UNUSED */
1169 zip = (struct zip *)(a->format->data);
1171 if (zip->entry->zip_flags & ZIP_LENGTH_AT_END) {
1173 ssize_t grabbing_bytes = 24;
1175 if (zip->hctx_valid)
1176 grabbing_bytes += AUTH_CODE_SIZE;
1177 /* Grab at least 24 bytes. */
1178 buff = __archive_read_ahead(a, grabbing_bytes, &bytes_avail);
1179 if (bytes_avail < grabbing_bytes) {
1180 /* Zip archives have end-of-archive markers
1181 that are longer than this, so a failure to get at
1182 least 24 bytes really does indicate a truncated
1184 archive_set_error(&a->archive,
1185 ARCHIVE_ERRNO_FILE_FORMAT,
1186 "Truncated ZIP file data");
1187 return (ARCHIVE_FATAL);
1189 /* Check for a complete PK\007\010 signature, followed
1190 * by the correct 4-byte CRC. */
1192 if (zip->hctx_valid)
1193 p += AUTH_CODE_SIZE;
1194 if (p[0] == 'P' && p[1] == 'K'
1195 && p[2] == '\007' && p[3] == '\010'
1196 && (archive_le32dec(p + 4) == zip->entry_crc32
1197 || zip->ignore_crc32
1199 && zip->entry->aes_extra.vendor == AES_VENDOR_AE_2))) {
1200 if (zip->entry->flags & LA_USED_ZIP64) {
1201 uint64_t compressed, uncompressed;
1202 zip->entry->crc32 = archive_le32dec(p + 4);
1203 compressed = archive_le64dec(p + 8);
1204 uncompressed = archive_le64dec(p + 16);
1205 if (compressed > INT64_MAX || uncompressed > INT64_MAX) {
1206 archive_set_error(&a->archive,
1207 ARCHIVE_ERRNO_FILE_FORMAT,
1208 "Overflow of 64-bit file sizes");
1209 return ARCHIVE_FAILED;
1211 zip->entry->compressed_size = compressed;
1212 zip->entry->uncompressed_size = uncompressed;
1213 zip->unconsumed = 24;
1215 zip->entry->crc32 = archive_le32dec(p + 4);
1216 zip->entry->compressed_size =
1217 archive_le32dec(p + 8);
1218 zip->entry->uncompressed_size =
1219 archive_le32dec(p + 12);
1220 zip->unconsumed = 16;
1222 if (zip->hctx_valid) {
1223 r = check_authentication_code(a, buff);
1224 if (r != ARCHIVE_OK)
1227 zip->end_of_entry = 1;
1228 return (ARCHIVE_OK);
1230 /* If not at EOF, ensure we consume at least one byte. */
1233 /* Scan forward until we see where a PK\007\010 signature
1235 /* Return bytes up until that point. On the next call,
1236 * the code above will verify the data descriptor. */
1237 while (p < buff + bytes_avail - 4) {
1238 if (p[3] == 'P') { p += 3; }
1239 else if (p[3] == 'K') { p += 2; }
1240 else if (p[3] == '\007') { p += 1; }
1241 else if (p[3] == '\010' && p[2] == '\007'
1242 && p[1] == 'K' && p[0] == 'P') {
1243 if (zip->hctx_valid)
1244 p -= AUTH_CODE_SIZE;
1248 bytes_avail = p - buff;
1250 if (zip->entry_bytes_remaining == 0) {
1251 zip->end_of_entry = 1;
1252 if (zip->hctx_valid) {
1253 r = check_authentication_code(a, NULL);
1254 if (r != ARCHIVE_OK)
1257 return (ARCHIVE_OK);
1259 /* Grab a bunch of bytes. */
1260 buff = __archive_read_ahead(a, 1, &bytes_avail);
1261 if (bytes_avail <= 0) {
1262 archive_set_error(&a->archive,
1263 ARCHIVE_ERRNO_FILE_FORMAT,
1264 "Truncated ZIP file data");
1265 return (ARCHIVE_FATAL);
1267 if (bytes_avail > zip->entry_bytes_remaining)
1268 bytes_avail = (ssize_t)zip->entry_bytes_remaining;
1270 if (zip->tctx_valid || zip->cctx_valid) {
1271 size_t dec_size = bytes_avail;
1273 if (dec_size > zip->decrypted_buffer_size)
1274 dec_size = zip->decrypted_buffer_size;
1275 if (zip->tctx_valid) {
1276 trad_enc_decrypt_update(&zip->tctx,
1277 (const uint8_t *)buff, dec_size,
1278 zip->decrypted_buffer, dec_size);
1280 size_t dsize = dec_size;
1281 archive_hmac_sha1_update(&zip->hctx,
1282 (const uint8_t *)buff, dec_size);
1283 archive_decrypto_aes_ctr_update(&zip->cctx,
1284 (const uint8_t *)buff, dec_size,
1285 zip->decrypted_buffer, &dsize);
1287 bytes_avail = dec_size;
1288 buff = (const char *)zip->decrypted_buffer;
1290 *size = bytes_avail;
1291 zip->entry_bytes_remaining -= bytes_avail;
1292 zip->entry_uncompressed_bytes_read += bytes_avail;
1293 zip->entry_compressed_bytes_read += bytes_avail;
1294 zip->unconsumed += bytes_avail;
1296 return (ARCHIVE_OK);
1301 zip_deflate_init(struct archive_read *a, struct zip *zip)
1305 /* If we haven't yet read any data, initialize the decompressor. */
1306 if (!zip->decompress_init) {
1307 if (zip->stream_valid)
1308 r = inflateReset(&zip->stream);
1310 r = inflateInit2(&zip->stream,
1311 -15 /* Don't check for zlib header */);
1313 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
1314 "Can't initialize ZIP decompression.");
1315 return (ARCHIVE_FATAL);
1317 /* Stream structure has been set up. */
1318 zip->stream_valid = 1;
1319 /* We've initialized decompression for this stream. */
1320 zip->decompress_init = 1;
1322 return (ARCHIVE_OK);
1326 zip_read_data_deflate(struct archive_read *a, const void **buff,
1327 size_t *size, int64_t *offset)
1330 ssize_t bytes_avail;
1331 const void *compressed_buff, *sp;
1334 (void)offset; /* UNUSED */
1336 zip = (struct zip *)(a->format->data);
1338 /* If the buffer hasn't been allocated, allocate it now. */
1339 if (zip->uncompressed_buffer == NULL) {
1340 zip->uncompressed_buffer_size = 256 * 1024;
1341 zip->uncompressed_buffer
1342 = (unsigned char *)malloc(zip->uncompressed_buffer_size);
1343 if (zip->uncompressed_buffer == NULL) {
1344 archive_set_error(&a->archive, ENOMEM,
1345 "No memory for ZIP decompression");
1346 return (ARCHIVE_FATAL);
1350 r = zip_deflate_init(a, zip);
1351 if (r != ARCHIVE_OK)
1355 * Note: '1' here is a performance optimization.
1356 * Recall that the decompression layer returns a count of
1357 * available bytes; asking for more than that forces the
1358 * decompressor to combine reads by copying data.
1360 compressed_buff = sp = __archive_read_ahead(a, 1, &bytes_avail);
1361 if (0 == (zip->entry->zip_flags & ZIP_LENGTH_AT_END)
1362 && bytes_avail > zip->entry_bytes_remaining) {
1363 bytes_avail = (ssize_t)zip->entry_bytes_remaining;
1365 if (bytes_avail < 0) {
1366 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
1367 "Truncated ZIP file body");
1368 return (ARCHIVE_FATAL);
1371 if (zip->tctx_valid || zip->cctx_valid) {
1372 if (zip->decrypted_bytes_remaining < (size_t)bytes_avail) {
1373 size_t buff_remaining =
1374 (zip->decrypted_buffer + zip->decrypted_buffer_size)
1375 - (zip->decrypted_ptr + zip->decrypted_bytes_remaining);
1377 if (buff_remaining > (size_t)bytes_avail)
1378 buff_remaining = (size_t)bytes_avail;
1380 if (0 == (zip->entry->zip_flags & ZIP_LENGTH_AT_END) &&
1381 zip->entry_bytes_remaining > 0) {
1382 if ((int64_t)(zip->decrypted_bytes_remaining
1384 > zip->entry_bytes_remaining) {
1385 if (zip->entry_bytes_remaining <
1386 (int64_t)zip->decrypted_bytes_remaining)
1390 (size_t)zip->entry_bytes_remaining
1391 - zip->decrypted_bytes_remaining;
1394 if (buff_remaining > 0) {
1395 if (zip->tctx_valid) {
1396 trad_enc_decrypt_update(&zip->tctx,
1397 compressed_buff, buff_remaining,
1399 + zip->decrypted_bytes_remaining,
1402 size_t dsize = buff_remaining;
1403 archive_decrypto_aes_ctr_update(
1405 compressed_buff, buff_remaining,
1407 + zip->decrypted_bytes_remaining,
1410 zip->decrypted_bytes_remaining += buff_remaining;
1413 bytes_avail = zip->decrypted_bytes_remaining;
1414 compressed_buff = (const char *)zip->decrypted_ptr;
1418 * A bug in zlib.h: stream.next_in should be marked 'const'
1419 * but isn't (the library never alters data through the
1420 * next_in pointer, only reads it). The result: this ugly
1421 * cast to remove 'const'.
1423 zip->stream.next_in = (Bytef *)(uintptr_t)(const void *)compressed_buff;
1424 zip->stream.avail_in = (uInt)bytes_avail;
1425 zip->stream.total_in = 0;
1426 zip->stream.next_out = zip->uncompressed_buffer;
1427 zip->stream.avail_out = (uInt)zip->uncompressed_buffer_size;
1428 zip->stream.total_out = 0;
1430 r = inflate(&zip->stream, 0);
1435 zip->end_of_entry = 1;
1438 archive_set_error(&a->archive, ENOMEM,
1439 "Out of memory for ZIP decompression");
1440 return (ARCHIVE_FATAL);
1442 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
1443 "ZIP decompression failed (%d)", r);
1444 return (ARCHIVE_FATAL);
1447 /* Consume as much as the compressor actually used. */
1448 bytes_avail = zip->stream.total_in;
1449 if (zip->tctx_valid || zip->cctx_valid) {
1450 zip->decrypted_bytes_remaining -= bytes_avail;
1451 if (zip->decrypted_bytes_remaining == 0)
1452 zip->decrypted_ptr = zip->decrypted_buffer;
1454 zip->decrypted_ptr += bytes_avail;
1456 /* Calculate compressed data as much as we used.*/
1457 if (zip->hctx_valid)
1458 archive_hmac_sha1_update(&zip->hctx, sp, bytes_avail);
1459 __archive_read_consume(a, bytes_avail);
1460 zip->entry_bytes_remaining -= bytes_avail;
1461 zip->entry_compressed_bytes_read += bytes_avail;
1463 *size = zip->stream.total_out;
1464 zip->entry_uncompressed_bytes_read += zip->stream.total_out;
1465 *buff = zip->uncompressed_buffer;
1467 if (zip->end_of_entry && zip->hctx_valid) {
1468 r = check_authentication_code(a, NULL);
1469 if (r != ARCHIVE_OK)
1473 if (zip->end_of_entry && (zip->entry->zip_flags & ZIP_LENGTH_AT_END)) {
1476 if (NULL == (p = __archive_read_ahead(a, 24, NULL))) {
1477 archive_set_error(&a->archive,
1478 ARCHIVE_ERRNO_FILE_FORMAT,
1479 "Truncated ZIP end-of-file record");
1480 return (ARCHIVE_FATAL);
1482 /* Consume the optional PK\007\010 marker. */
1483 if (p[0] == 'P' && p[1] == 'K' &&
1484 p[2] == '\007' && p[3] == '\010') {
1486 zip->unconsumed = 4;
1488 if (zip->entry->flags & LA_USED_ZIP64) {
1489 uint64_t compressed, uncompressed;
1490 zip->entry->crc32 = archive_le32dec(p);
1491 compressed = archive_le64dec(p + 4);
1492 uncompressed = archive_le64dec(p + 12);
1493 if (compressed > INT64_MAX || uncompressed > INT64_MAX) {
1494 archive_set_error(&a->archive,
1495 ARCHIVE_ERRNO_FILE_FORMAT,
1496 "Overflow of 64-bit file sizes");
1497 return ARCHIVE_FAILED;
1499 zip->entry->compressed_size = compressed;
1500 zip->entry->uncompressed_size = uncompressed;
1501 zip->unconsumed += 20;
1503 zip->entry->crc32 = archive_le32dec(p);
1504 zip->entry->compressed_size = archive_le32dec(p + 4);
1505 zip->entry->uncompressed_size = archive_le32dec(p + 8);
1506 zip->unconsumed += 12;
1510 return (ARCHIVE_OK);
1515 read_decryption_header(struct archive_read *a)
1517 struct zip *zip = (struct zip *)(a->format->data);
1519 unsigned int remaining_size;
1523 * Read an initialization vector data field.
1525 p = __archive_read_ahead(a, 2, NULL);
1529 zip->iv_size = archive_le16dec(p);
1530 __archive_read_consume(a, 2);
1531 if (ts < zip->iv_size) {
1535 p = __archive_read_ahead(a, zip->iv_size, NULL);
1538 if (zip->iv == NULL) {
1539 zip->iv = malloc(zip->iv_size);
1540 if (zip->iv == NULL)
1543 memcpy(zip->iv, p, zip->iv_size);
1544 __archive_read_consume(a, zip->iv_size);
1547 * Read a size of remaining decryption header field.
1549 p = __archive_read_ahead(a, 14, NULL);
1552 remaining_size = archive_le32dec(p);
1553 if (remaining_size < 16 || remaining_size > (1 << 18))
1556 /* Check if format version is supported. */
1557 if (archive_le16dec(p+4) != 3) {
1558 archive_set_error(&a->archive,
1559 ARCHIVE_ERRNO_FILE_FORMAT,
1560 "Unsupported encryption format version: %u",
1561 archive_le16dec(p+4));
1562 return (ARCHIVE_FAILED);
1566 * Read an encryption algorithm field.
1568 zip->alg_id = archive_le16dec(p+6);
1569 switch (zip->alg_id) {
1570 case 0x6601:/* DES */
1571 case 0x6602:/* RC2 */
1572 case 0x6603:/* 3DES 168 */
1573 case 0x6609:/* 3DES 112 */
1574 case 0x660E:/* AES 128 */
1575 case 0x660F:/* AES 192 */
1576 case 0x6610:/* AES 256 */
1577 case 0x6702:/* RC2 (version >= 5.2) */
1578 case 0x6720:/* Blowfish */
1579 case 0x6721:/* Twofish */
1580 case 0x6801:/* RC4 */
1581 /* Supported encryption algorithm. */
1584 archive_set_error(&a->archive,
1585 ARCHIVE_ERRNO_FILE_FORMAT,
1586 "Unknown encryption algorithm: %u", zip->alg_id);
1587 return (ARCHIVE_FAILED);
1591 * Read a bit length field.
1593 zip->bit_len = archive_le16dec(p+8);
1596 * Read a flags field.
1598 zip->flags = archive_le16dec(p+10);
1599 switch (zip->flags & 0xf000) {
1600 case 0x0001: /* Password is required to decrypt. */
1601 case 0x0002: /* Certificates only. */
1602 case 0x0003: /* Password or certificate required to decrypt. */
1605 archive_set_error(&a->archive,
1606 ARCHIVE_ERRNO_FILE_FORMAT,
1607 "Unknown encryption flag: %u", zip->flags);
1608 return (ARCHIVE_FAILED);
1610 if ((zip->flags & 0xf000) == 0 ||
1611 (zip->flags & 0xf000) == 0x4000) {
1612 archive_set_error(&a->archive,
1613 ARCHIVE_ERRNO_FILE_FORMAT,
1614 "Unknown encryption flag: %u", zip->flags);
1615 return (ARCHIVE_FAILED);
1619 * Read an encrypted random data field.
1622 zip->erd_size = archive_le16dec(p+12);
1623 __archive_read_consume(a, 14);
1624 if ((zip->erd_size & 0xf) != 0 ||
1625 (zip->erd_size + 16) > remaining_size ||
1626 (zip->erd_size + 16) < zip->erd_size)
1629 if (ts < zip->erd_size) {
1633 p = __archive_read_ahead(a, zip->erd_size, NULL);
1636 if (zip->erd == NULL) {
1637 zip->erd = malloc(zip->erd_size);
1638 if (zip->erd == NULL)
1641 memcpy(zip->erd, p, zip->erd_size);
1642 __archive_read_consume(a, zip->erd_size);
1645 * Read a reserved data field.
1647 p = __archive_read_ahead(a, 4, NULL);
1650 /* Reserved data size should be zero. */
1651 if (archive_le32dec(p) != 0)
1653 __archive_read_consume(a, 4);
1656 * Read a password validation data field.
1658 p = __archive_read_ahead(a, 2, NULL);
1662 zip->v_size = archive_le16dec(p);
1663 __archive_read_consume(a, 2);
1664 if ((zip->v_size & 0x0f) != 0 ||
1665 (zip->erd_size + zip->v_size + 16) > remaining_size ||
1666 (zip->erd_size + zip->v_size + 16) < (zip->erd_size + zip->v_size))
1668 if (ts < zip->v_size) {
1672 p = __archive_read_ahead(a, zip->v_size, NULL);
1675 if (zip->v_data == NULL) {
1676 zip->v_data = malloc(zip->v_size);
1677 if (zip->v_data == NULL)
1680 memcpy(zip->v_data, p, zip->v_size);
1681 __archive_read_consume(a, zip->v_size);
1683 p = __archive_read_ahead(a, 4, NULL);
1686 zip->v_crc32 = archive_le32dec(p);
1687 __archive_read_consume(a, 4);
1689 /*return (ARCHIVE_OK);
1690 * This is not fully implemented yet.*/
1691 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
1692 "Encrypted file is unsupported");
1693 return (ARCHIVE_FAILED);
1695 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
1696 "Truncated ZIP file data");
1697 return (ARCHIVE_FATAL);
1699 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
1700 "Corrupted ZIP file data");
1701 return (ARCHIVE_FATAL);
1703 archive_set_error(&a->archive, ENOMEM,
1704 "No memory for ZIP decryption");
1705 return (ARCHIVE_FATAL);
1709 zip_alloc_decryption_buffer(struct archive_read *a)
1711 struct zip *zip = (struct zip *)(a->format->data);
1712 size_t bs = 256 * 1024;
1714 if (zip->decrypted_buffer == NULL) {
1715 zip->decrypted_buffer_size = bs;
1716 zip->decrypted_buffer = malloc(bs);
1717 if (zip->decrypted_buffer == NULL) {
1718 archive_set_error(&a->archive, ENOMEM,
1719 "No memory for ZIP decryption");
1720 return (ARCHIVE_FATAL);
1723 zip->decrypted_ptr = zip->decrypted_buffer;
1724 return (ARCHIVE_OK);
1728 init_traditional_PKWARE_decryption(struct archive_read *a)
1730 struct zip *zip = (struct zip *)(a->format->data);
1735 if (zip->tctx_valid)
1736 return (ARCHIVE_OK);
1739 Read the 12 bytes encryption header stored at
1740 the start of the data area.
1742 #define ENC_HEADER_SIZE 12
1743 if (0 == (zip->entry->zip_flags & ZIP_LENGTH_AT_END)
1744 && zip->entry_bytes_remaining < ENC_HEADER_SIZE) {
1745 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
1746 "Truncated Zip encrypted body: only %jd bytes available",
1747 (intmax_t)zip->entry_bytes_remaining);
1748 return (ARCHIVE_FATAL);
1751 p = __archive_read_ahead(a, ENC_HEADER_SIZE, NULL);
1753 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
1754 "Truncated ZIP file data");
1755 return (ARCHIVE_FATAL);
1758 for (retry = 0;; retry++) {
1759 const char *passphrase;
1762 passphrase = __archive_read_next_passphrase(a);
1763 if (passphrase == NULL) {
1764 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
1766 "Incorrect passphrase":
1767 "Passphrase required for this entry");
1768 return (ARCHIVE_FAILED);
1772 * Initialize ctx for Traditional PKWARE Decryption.
1774 r = trad_enc_init(&zip->tctx, passphrase, strlen(passphrase),
1775 p, ENC_HEADER_SIZE, &crcchk);
1776 if (r == 0 && crcchk == zip->entry->decdat)
1777 break;/* The passphrase is OK. */
1778 if (retry > 10000) {
1779 /* Avoid infinity loop. */
1780 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
1781 "Too many incorrect passphrases");
1782 return (ARCHIVE_FAILED);
1786 __archive_read_consume(a, ENC_HEADER_SIZE);
1787 zip->tctx_valid = 1;
1788 if (0 == (zip->entry->zip_flags & ZIP_LENGTH_AT_END)) {
1789 zip->entry_bytes_remaining -= ENC_HEADER_SIZE;
1791 /*zip->entry_uncompressed_bytes_read += ENC_HEADER_SIZE;*/
1792 zip->entry_compressed_bytes_read += ENC_HEADER_SIZE;
1793 zip->decrypted_bytes_remaining = 0;
1795 return (zip_alloc_decryption_buffer(a));
1796 #undef ENC_HEADER_SIZE
1800 init_WinZip_AES_decryption(struct archive_read *a)
1802 struct zip *zip = (struct zip *)(a->format->data);
1805 size_t key_len, salt_len;
1806 uint8_t derived_key[MAX_DERIVED_KEY_BUF_SIZE];
1810 if (zip->cctx_valid || zip->hctx_valid)
1811 return (ARCHIVE_OK);
1813 switch (zip->entry->aes_extra.strength) {
1814 case 1: salt_len = 8; key_len = 16; break;
1815 case 2: salt_len = 12; key_len = 24; break;
1816 case 3: salt_len = 16; key_len = 32; break;
1817 default: goto corrupted;
1819 p = __archive_read_ahead(a, salt_len + 2, NULL);
1823 for (retry = 0;; retry++) {
1824 const char *passphrase;
1826 passphrase = __archive_read_next_passphrase(a);
1827 if (passphrase == NULL) {
1828 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
1830 "Incorrect passphrase":
1831 "Passphrase required for this entry");
1832 return (ARCHIVE_FAILED);
1834 memset(derived_key, 0, sizeof(derived_key));
1835 r = archive_pbkdf2_sha1(passphrase, strlen(passphrase),
1836 p, salt_len, 1000, derived_key, key_len * 2 + 2);
1838 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
1839 "Decryption is unsupported due to lack of "
1841 return (ARCHIVE_FAILED);
1844 /* Check password verification value. */
1845 pv = ((const uint8_t *)p) + salt_len;
1846 if (derived_key[key_len * 2] == pv[0] &&
1847 derived_key[key_len * 2 + 1] == pv[1])
1848 break;/* The passphrase is OK. */
1849 if (retry > 10000) {
1850 /* Avoid infinity loop. */
1851 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
1852 "Too many incorrect passphrases");
1853 return (ARCHIVE_FAILED);
1857 r = archive_decrypto_aes_ctr_init(&zip->cctx, derived_key, key_len);
1859 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
1860 "Decryption is unsupported due to lack of crypto library");
1861 return (ARCHIVE_FAILED);
1863 r = archive_hmac_sha1_init(&zip->hctx, derived_key + key_len, key_len);
1865 archive_decrypto_aes_ctr_release(&zip->cctx);
1866 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
1867 "Failed to initialize HMAC-SHA1");
1868 return (ARCHIVE_FAILED);
1870 zip->cctx_valid = zip->hctx_valid = 1;
1871 __archive_read_consume(a, salt_len + 2);
1872 zip->entry_bytes_remaining -= salt_len + 2 + AUTH_CODE_SIZE;
1873 if (0 == (zip->entry->zip_flags & ZIP_LENGTH_AT_END)
1874 && zip->entry_bytes_remaining < 0)
1876 zip->entry_compressed_bytes_read += salt_len + 2 + AUTH_CODE_SIZE;
1877 zip->decrypted_bytes_remaining = 0;
1879 zip->entry->compression = zip->entry->aes_extra.compression;
1880 return (zip_alloc_decryption_buffer(a));
1883 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
1884 "Truncated ZIP file data");
1885 return (ARCHIVE_FATAL);
1887 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
1888 "Corrupted ZIP file data");
1889 return (ARCHIVE_FATAL);
1893 archive_read_format_zip_read_data(struct archive_read *a,
1894 const void **buff, size_t *size, int64_t *offset)
1897 struct zip *zip = (struct zip *)(a->format->data);
1899 if (zip->has_encrypted_entries ==
1900 ARCHIVE_READ_FORMAT_ENCRYPTION_DONT_KNOW) {
1901 zip->has_encrypted_entries = 0;
1904 *offset = zip->entry_uncompressed_bytes_read;
1908 /* If we hit end-of-entry last time, return ARCHIVE_EOF. */
1909 if (zip->end_of_entry)
1910 return (ARCHIVE_EOF);
1912 /* Return EOF immediately if this is a non-regular file. */
1913 if (AE_IFREG != (zip->entry->mode & AE_IFMT))
1914 return (ARCHIVE_EOF);
1916 __archive_read_consume(a, zip->unconsumed);
1917 zip->unconsumed = 0;
1919 if (zip->init_decryption) {
1920 zip->has_encrypted_entries = 1;
1921 if (zip->entry->zip_flags & ZIP_STRONG_ENCRYPTED)
1922 r = read_decryption_header(a);
1923 else if (zip->entry->compression == WINZIP_AES_ENCRYPTION)
1924 r = init_WinZip_AES_decryption(a);
1926 r = init_traditional_PKWARE_decryption(a);
1927 if (r != ARCHIVE_OK)
1929 zip->init_decryption = 0;
1932 switch(zip->entry->compression) {
1933 case 0: /* No compression. */
1934 r = zip_read_data_none(a, buff, size, offset);
1937 case 8: /* Deflate compression. */
1938 r = zip_read_data_deflate(a, buff, size, offset);
1941 default: /* Unsupported compression. */
1942 /* Return a warning. */
1943 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
1944 "Unsupported ZIP compression method (%s)",
1945 compression_name(zip->entry->compression));
1946 /* We can't decompress this entry, but we will
1947 * be able to skip() it and try the next entry. */
1948 return (ARCHIVE_FAILED);
1951 if (r != ARCHIVE_OK)
1953 /* Update checksum */
1955 zip->entry_crc32 = zip->crc32func(zip->entry_crc32, *buff,
1957 /* If we hit the end, swallow any end-of-data marker. */
1958 if (zip->end_of_entry) {
1959 /* Check file size, CRC against these values. */
1960 if (zip->entry->compressed_size !=
1961 zip->entry_compressed_bytes_read) {
1962 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
1963 "ZIP compressed data is wrong size "
1964 "(read %jd, expected %jd)",
1965 (intmax_t)zip->entry_compressed_bytes_read,
1966 (intmax_t)zip->entry->compressed_size);
1967 return (ARCHIVE_WARN);
1969 /* Size field only stores the lower 32 bits of the actual
1971 if ((zip->entry->uncompressed_size & UINT32_MAX)
1972 != (zip->entry_uncompressed_bytes_read & UINT32_MAX)) {
1973 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
1974 "ZIP uncompressed data is wrong size "
1975 "(read %jd, expected %jd)\n",
1976 (intmax_t)zip->entry_uncompressed_bytes_read,
1977 (intmax_t)zip->entry->uncompressed_size);
1978 return (ARCHIVE_WARN);
1980 /* Check computed CRC against header */
1981 if ((!zip->hctx_valid ||
1982 zip->entry->aes_extra.vendor != AES_VENDOR_AE_2) &&
1983 zip->entry->crc32 != zip->entry_crc32
1984 && !zip->ignore_crc32) {
1985 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
1986 "ZIP bad CRC: 0x%lx should be 0x%lx",
1987 (unsigned long)zip->entry_crc32,
1988 (unsigned long)zip->entry->crc32);
1989 return (ARCHIVE_WARN);
1993 return (ARCHIVE_OK);
1997 archive_read_format_zip_cleanup(struct archive_read *a)
2000 struct zip_entry *zip_entry, *next_zip_entry;
2002 zip = (struct zip *)(a->format->data);
2004 if (zip->stream_valid)
2005 inflateEnd(&zip->stream);
2006 free(zip->uncompressed_buffer);
2008 if (zip->zip_entries) {
2009 zip_entry = zip->zip_entries;
2010 while (zip_entry != NULL) {
2011 next_zip_entry = zip_entry->next;
2012 archive_string_free(&zip_entry->rsrcname);
2014 zip_entry = next_zip_entry;
2017 free(zip->decrypted_buffer);
2018 if (zip->cctx_valid)
2019 archive_decrypto_aes_ctr_release(&zip->cctx);
2020 if (zip->hctx_valid)
2021 archive_hmac_sha1_cleanup(&zip->hctx);
2025 archive_string_free(&zip->format_name);
2027 (a->format->data) = NULL;
2028 return (ARCHIVE_OK);
2032 archive_read_format_zip_has_encrypted_entries(struct archive_read *_a)
2034 if (_a && _a->format) {
2035 struct zip * zip = (struct zip *)_a->format->data;
2037 return zip->has_encrypted_entries;
2040 return ARCHIVE_READ_FORMAT_ENCRYPTION_DONT_KNOW;
2044 archive_read_format_zip_options(struct archive_read *a,
2045 const char *key, const char *val)
2048 int ret = ARCHIVE_FAILED;
2050 zip = (struct zip *)(a->format->data);
2051 if (strcmp(key, "compat-2x") == 0) {
2052 /* Handle filenames as libarchive 2.x */
2053 zip->init_default_conversion = (val != NULL) ? 1 : 0;
2054 return (ARCHIVE_OK);
2055 } else if (strcmp(key, "hdrcharset") == 0) {
2056 if (val == NULL || val[0] == 0)
2057 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
2058 "zip: hdrcharset option needs a character-set name"
2061 zip->sconv = archive_string_conversion_from_charset(
2062 &a->archive, val, 0);
2063 if (zip->sconv != NULL) {
2064 if (strcmp(val, "UTF-8") == 0)
2065 zip->sconv_utf8 = zip->sconv;
2068 ret = ARCHIVE_FATAL;
2071 } else if (strcmp(key, "ignorecrc32") == 0) {
2072 /* Mostly useful for testing. */
2073 if (val == NULL || val[0] == 0) {
2074 zip->crc32func = real_crc32;
2075 zip->ignore_crc32 = 0;
2077 zip->crc32func = fake_crc32;
2078 zip->ignore_crc32 = 1;
2080 return (ARCHIVE_OK);
2081 } else if (strcmp(key, "mac-ext") == 0) {
2082 zip->process_mac_extensions = (val != NULL && val[0] != 0);
2083 return (ARCHIVE_OK);
2086 /* Note: The "warn" return is just to inform the options
2087 * supervisor that we didn't handle it. It will generate
2088 * a suitable error if no one used this option. */
2089 return (ARCHIVE_WARN);
2093 archive_read_support_format_zip(struct archive *a)
2096 r = archive_read_support_format_zip_streamable(a);
2097 if (r != ARCHIVE_OK)
2099 return (archive_read_support_format_zip_seekable(a));
2102 /* ------------------------------------------------------------------------ */
2105 * Streaming-mode support
2110 archive_read_support_format_zip_capabilities_streamable(struct archive_read * a)
2112 (void)a; /* UNUSED */
2113 return (ARCHIVE_READ_FORMAT_CAPS_ENCRYPT_DATA |
2114 ARCHIVE_READ_FORMAT_CAPS_ENCRYPT_METADATA);
2118 archive_read_format_zip_streamable_bid(struct archive_read *a, int best_bid)
2122 (void)best_bid; /* UNUSED */
2124 if ((p = __archive_read_ahead(a, 4, NULL)) == NULL)
2128 * Bid of 29 here comes from:
2129 * + 16 bits for "PK",
2130 * + next 16-bit field has 6 options so contributes
2131 * about 16 - log_2(6) ~= 16 - 2.6 ~= 13 bits
2133 * So we've effectively verified ~29 total bits of check data.
2135 if (p[0] == 'P' && p[1] == 'K') {
2136 if ((p[2] == '\001' && p[3] == '\002')
2137 || (p[2] == '\003' && p[3] == '\004')
2138 || (p[2] == '\005' && p[3] == '\006')
2139 || (p[2] == '\006' && p[3] == '\006')
2140 || (p[2] == '\007' && p[3] == '\010')
2141 || (p[2] == '0' && p[3] == '0'))
2145 /* TODO: It's worth looking ahead a little bit for a valid
2146 * PK signature. In particular, that would make it possible
2147 * to read some UUEncoded SFX files or SFX files coming from
2148 * a network socket. */
2154 archive_read_format_zip_streamable_read_header(struct archive_read *a,
2155 struct archive_entry *entry)
2159 a->archive.archive_format = ARCHIVE_FORMAT_ZIP;
2160 if (a->archive.archive_format_name == NULL)
2161 a->archive.archive_format_name = "ZIP";
2163 zip = (struct zip *)(a->format->data);
2166 * It should be sufficient to call archive_read_next_header() for
2167 * a reader to determine if an entry is encrypted or not. If the
2168 * encryption of an entry is only detectable when calling
2169 * archive_read_data(), so be it. We'll do the same check there
2172 if (zip->has_encrypted_entries ==
2173 ARCHIVE_READ_FORMAT_ENCRYPTION_DONT_KNOW)
2174 zip->has_encrypted_entries = 0;
2176 /* Make sure we have a zip_entry structure to use. */
2177 if (zip->zip_entries == NULL) {
2178 zip->zip_entries = malloc(sizeof(struct zip_entry));
2179 if (zip->zip_entries == NULL) {
2180 archive_set_error(&a->archive, ENOMEM,
2182 return ARCHIVE_FATAL;
2185 zip->entry = zip->zip_entries;
2186 memset(zip->entry, 0, sizeof(struct zip_entry));
2188 if (zip->cctx_valid)
2189 archive_decrypto_aes_ctr_release(&zip->cctx);
2190 if (zip->hctx_valid)
2191 archive_hmac_sha1_cleanup(&zip->hctx);
2192 zip->tctx_valid = zip->cctx_valid = zip->hctx_valid = 0;
2193 __archive_read_reset_passphrase(a);
2195 /* Search ahead for the next local file header. */
2196 __archive_read_consume(a, zip->unconsumed);
2197 zip->unconsumed = 0;
2199 int64_t skipped = 0;
2200 const char *p, *end;
2203 p = __archive_read_ahead(a, 4, &bytes);
2205 return (ARCHIVE_FATAL);
2208 while (p + 4 <= end) {
2209 if (p[0] == 'P' && p[1] == 'K') {
2210 if (p[2] == '\003' && p[3] == '\004') {
2211 /* Regular file entry. */
2212 __archive_read_consume(a, skipped);
2213 return zip_read_local_file_header(a,
2218 * TODO: We cannot restore permissions
2219 * based only on the local file headers.
2220 * Consider scanning the central
2221 * directory and returning additional
2222 * entries for at least directories.
2223 * This would allow us to properly set
2224 * directory permissions.
2226 * This won't help us fix symlinks
2227 * and may not help with regular file
2228 * permissions, either. <sigh>
2230 if (p[2] == '\001' && p[3] == '\002') {
2231 return (ARCHIVE_EOF);
2234 /* End of central directory? Must be an
2236 if ((p[2] == '\005' && p[3] == '\006')
2237 || (p[2] == '\006' && p[3] == '\006'))
2238 return (ARCHIVE_EOF);
2243 __archive_read_consume(a, skipped);
2248 archive_read_format_zip_read_data_skip_streamable(struct archive_read *a)
2251 int64_t bytes_skipped;
2253 zip = (struct zip *)(a->format->data);
2254 bytes_skipped = __archive_read_consume(a, zip->unconsumed);
2255 zip->unconsumed = 0;
2256 if (bytes_skipped < 0)
2257 return (ARCHIVE_FATAL);
2259 /* If we've already read to end of data, we're done. */
2260 if (zip->end_of_entry)
2261 return (ARCHIVE_OK);
2263 /* So we know we're streaming... */
2264 if (0 == (zip->entry->zip_flags & ZIP_LENGTH_AT_END)
2265 || zip->entry->compressed_size > 0) {
2266 /* We know the compressed length, so we can just skip. */
2267 bytes_skipped = __archive_read_consume(a,
2268 zip->entry_bytes_remaining);
2269 if (bytes_skipped < 0)
2270 return (ARCHIVE_FATAL);
2271 return (ARCHIVE_OK);
2274 if (zip->init_decryption) {
2277 zip->has_encrypted_entries = 1;
2278 if (zip->entry->zip_flags & ZIP_STRONG_ENCRYPTED)
2279 r = read_decryption_header(a);
2280 else if (zip->entry->compression == WINZIP_AES_ENCRYPTION)
2281 r = init_WinZip_AES_decryption(a);
2283 r = init_traditional_PKWARE_decryption(a);
2284 if (r != ARCHIVE_OK)
2286 zip->init_decryption = 0;
2289 /* We're streaming and we don't know the length. */
2290 /* If the body is compressed and we know the format, we can
2291 * find an exact end-of-entry by decompressing it. */
2292 switch (zip->entry->compression) {
2294 case 8: /* Deflate compression. */
2295 while (!zip->end_of_entry) {
2297 const void *buff = NULL;
2300 r = zip_read_data_deflate(a, &buff, &size, &offset);
2301 if (r != ARCHIVE_OK)
2306 default: /* Uncompressed or unknown. */
2307 /* Scan for a PK\007\010 signature. */
2309 const char *p, *buff;
2310 ssize_t bytes_avail;
2311 buff = __archive_read_ahead(a, 16, &bytes_avail);
2312 if (bytes_avail < 16) {
2313 archive_set_error(&a->archive,
2314 ARCHIVE_ERRNO_FILE_FORMAT,
2315 "Truncated ZIP file data");
2316 return (ARCHIVE_FATAL);
2319 while (p <= buff + bytes_avail - 16) {
2320 if (p[3] == 'P') { p += 3; }
2321 else if (p[3] == 'K') { p += 2; }
2322 else if (p[3] == '\007') { p += 1; }
2323 else if (p[3] == '\010' && p[2] == '\007'
2324 && p[1] == 'K' && p[0] == 'P') {
2325 if (zip->entry->flags & LA_USED_ZIP64)
2326 __archive_read_consume(a,
2329 __archive_read_consume(a,
2334 __archive_read_consume(a, p - buff);
2340 archive_read_support_format_zip_streamable(struct archive *_a)
2342 struct archive_read *a = (struct archive_read *)_a;
2346 archive_check_magic(_a, ARCHIVE_READ_MAGIC,
2347 ARCHIVE_STATE_NEW, "archive_read_support_format_zip");
2349 zip = (struct zip *)calloc(1, sizeof(*zip));
2351 archive_set_error(&a->archive, ENOMEM,
2352 "Can't allocate zip data");
2353 return (ARCHIVE_FATAL);
2356 /* Streamable reader doesn't support mac extensions. */
2357 zip->process_mac_extensions = 0;
2360 * Until enough data has been read, we cannot tell about
2361 * any encrypted entries yet.
2363 zip->has_encrypted_entries = ARCHIVE_READ_FORMAT_ENCRYPTION_DONT_KNOW;
2364 zip->crc32func = real_crc32;
2366 r = __archive_read_register_format(a,
2369 archive_read_format_zip_streamable_bid,
2370 archive_read_format_zip_options,
2371 archive_read_format_zip_streamable_read_header,
2372 archive_read_format_zip_read_data,
2373 archive_read_format_zip_read_data_skip_streamable,
2375 archive_read_format_zip_cleanup,
2376 archive_read_support_format_zip_capabilities_streamable,
2377 archive_read_format_zip_has_encrypted_entries);
2379 if (r != ARCHIVE_OK)
2381 return (ARCHIVE_OK);
2384 /* ------------------------------------------------------------------------ */
2387 * Seeking-mode support
2391 archive_read_support_format_zip_capabilities_seekable(struct archive_read * a)
2393 (void)a; /* UNUSED */
2394 return (ARCHIVE_READ_FORMAT_CAPS_ENCRYPT_DATA |
2395 ARCHIVE_READ_FORMAT_CAPS_ENCRYPT_METADATA);
2399 * TODO: This is a performance sink because it forces the read core to
2400 * drop buffered data from the start of file, which will then have to
2401 * be re-read again if this bidder loses.
2403 * We workaround this a little by passing in the best bid so far so
2404 * that later bidders can do nothing if they know they'll never
2405 * outbid. But we can certainly do better...
2408 read_eocd(struct zip *zip, const char *p, int64_t current_offset)
2410 /* Sanity-check the EOCD we've found. */
2412 /* This must be the first volume. */
2413 if (archive_le16dec(p + 4) != 0)
2415 /* Central directory must be on this volume. */
2416 if (archive_le16dec(p + 4) != archive_le16dec(p + 6))
2418 /* All central directory entries must be on this volume. */
2419 if (archive_le16dec(p + 10) != archive_le16dec(p + 8))
2421 /* Central directory can't extend beyond start of EOCD record. */
2422 if (archive_le32dec(p + 16) + archive_le32dec(p + 12)
2426 /* Save the central directory location for later use. */
2427 zip->central_directory_offset = archive_le32dec(p + 16);
2429 /* This is just a tiny bit higher than the maximum
2430 returned by the streaming Zip bidder. This ensures
2431 that the more accurate seeking Zip parser wins
2432 whenever seek is available. */
2437 * Examine Zip64 EOCD locator: If it's valid, store the information
2441 read_zip64_eocd(struct archive_read *a, struct zip *zip, const char *p)
2443 int64_t eocd64_offset;
2444 int64_t eocd64_size;
2446 /* Sanity-check the locator record. */
2448 /* Central dir must be on first volume. */
2449 if (archive_le32dec(p + 4) != 0)
2451 /* Must be only a single volume. */
2452 if (archive_le32dec(p + 16) != 1)
2455 /* Find the Zip64 EOCD record. */
2456 eocd64_offset = archive_le64dec(p + 8);
2457 if (__archive_read_seek(a, eocd64_offset, SEEK_SET) < 0)
2459 if ((p = __archive_read_ahead(a, 56, NULL)) == NULL)
2461 /* Make sure we can read all of it. */
2462 eocd64_size = archive_le64dec(p + 4) + 12;
2463 if (eocd64_size < 56 || eocd64_size > 16384)
2465 if ((p = __archive_read_ahead(a, (size_t)eocd64_size, NULL)) == NULL)
2468 /* Sanity-check the EOCD64 */
2469 if (archive_le32dec(p + 16) != 0) /* Must be disk #0 */
2471 if (archive_le32dec(p + 20) != 0) /* CD must be on disk #0 */
2473 /* CD can't be split. */
2474 if (archive_le64dec(p + 24) != archive_le64dec(p + 32))
2477 /* Save the central directory offset for later use. */
2478 zip->central_directory_offset = archive_le64dec(p + 48);
2484 archive_read_format_zip_seekable_bid(struct archive_read *a, int best_bid)
2486 struct zip *zip = (struct zip *)a->format->data;
2487 int64_t file_size, current_offset;
2491 /* If someone has already bid more than 32, then avoid
2492 trashing the look-ahead buffers with a seek. */
2496 file_size = __archive_read_seek(a, 0, SEEK_END);
2500 /* Search last 16k of file for end-of-central-directory
2501 * record (which starts with PK\005\006) */
2502 tail = (int)zipmin(1024 * 16, file_size);
2503 current_offset = __archive_read_seek(a, -tail, SEEK_END);
2504 if (current_offset < 0)
2506 if ((p = __archive_read_ahead(a, (size_t)tail, NULL)) == NULL)
2508 /* Boyer-Moore search backwards from the end, since we want
2509 * to match the last EOCD in the file (there can be more than
2510 * one if there is an uncompressed Zip archive as a member
2511 * within this Zip archive). */
2512 for (i = tail - 22; i > 0;) {
2515 if (memcmp(p + i, "PK\005\006", 4) == 0) {
2516 int ret = read_eocd(zip, p + i,
2517 current_offset + i);
2518 /* Zip64 EOCD locator precedes
2519 * regular EOCD if present. */
2520 if (i >= 20 && memcmp(p + i - 20, "PK\006\007", 4) == 0) {
2521 int ret_zip64 = read_zip64_eocd(a, zip, p + i - 20);
2522 if (ret_zip64 > ret)
2529 case 'K': i -= 1; break;
2530 case 005: i -= 2; break;
2531 case 006: i -= 3; break;
2532 default: i -= 4; break;
2538 /* The red-black trees are only used in seeking mode to manage
2539 * the in-memory copy of the central directory. */
2542 cmp_node(const struct archive_rb_node *n1, const struct archive_rb_node *n2)
2544 const struct zip_entry *e1 = (const struct zip_entry *)n1;
2545 const struct zip_entry *e2 = (const struct zip_entry *)n2;
2547 if (e1->local_header_offset > e2->local_header_offset)
2549 if (e1->local_header_offset < e2->local_header_offset)
2555 cmp_key(const struct archive_rb_node *n, const void *key)
2557 /* This function won't be called */
2558 (void)n; /* UNUSED */
2559 (void)key; /* UNUSED */
2563 static const struct archive_rb_tree_ops rb_ops = {
2568 rsrc_cmp_node(const struct archive_rb_node *n1,
2569 const struct archive_rb_node *n2)
2571 const struct zip_entry *e1 = (const struct zip_entry *)n1;
2572 const struct zip_entry *e2 = (const struct zip_entry *)n2;
2574 return (strcmp(e2->rsrcname.s, e1->rsrcname.s));
2578 rsrc_cmp_key(const struct archive_rb_node *n, const void *key)
2580 const struct zip_entry *e = (const struct zip_entry *)n;
2581 return (strcmp((const char *)key, e->rsrcname.s));
2584 static const struct archive_rb_tree_ops rb_rsrc_ops = {
2585 &rsrc_cmp_node, &rsrc_cmp_key
2589 rsrc_basename(const char *name, size_t name_length)
2595 s = memchr(s, '/', name_length - (s - name));
2604 expose_parent_dirs(struct zip *zip, const char *name, size_t name_length)
2606 struct archive_string str;
2607 struct zip_entry *dir;
2610 archive_string_init(&str);
2611 archive_strncpy(&str, name, name_length);
2613 s = strrchr(str.s, '/');
2617 /* Transfer the parent directory from zip->tree_rsrc RB
2618 * tree to zip->tree RB tree to expose. */
2619 dir = (struct zip_entry *)
2620 __archive_rb_tree_find_node(&zip->tree_rsrc, str.s);
2623 __archive_rb_tree_remove_node(&zip->tree_rsrc, &dir->node);
2624 archive_string_free(&dir->rsrcname);
2625 __archive_rb_tree_insert_node(&zip->tree, &dir->node);
2627 archive_string_free(&str);
2631 slurp_central_directory(struct archive_read *a, struct zip *zip)
2636 ssize_t bytes_avail;
2640 * Find the start of the central directory. The end-of-CD
2641 * record has our starting point, but there are lots of
2642 * Zip archives which have had other data prepended to the
2643 * file, which makes the recorded offsets all too small.
2644 * So we search forward from the specified offset until we
2645 * find the real start of the central directory. Then we
2646 * know the correction we need to apply to account for leading
2649 if (__archive_read_seek(a, zip->central_directory_offset, SEEK_SET) < 0)
2650 return ARCHIVE_FATAL;
2654 if ((p = __archive_read_ahead(a, 20, &bytes_avail)) == NULL)
2655 return ARCHIVE_FATAL;
2656 for (found = 0, i = 0; !found && i < bytes_avail - 4;) {
2658 case 'P': i += 3; break;
2659 case 'K': i += 2; break;
2660 case 001: i += 1; break;
2662 if (memcmp(p + i, "PK\001\002", 4) == 0) {
2668 case 005: i += 1; break;
2670 if (memcmp(p + i, "PK\005\006", 4) == 0) {
2673 } else if (memcmp(p + i, "PK\006\006", 4) == 0) {
2679 default: i += 4; break;
2682 __archive_read_consume(a, i);
2684 correction = archive_filter_bytes(&a->archive, 0)
2685 - zip->central_directory_offset;
2687 __archive_rb_tree_init(&zip->tree, &rb_ops);
2688 __archive_rb_tree_init(&zip->tree_rsrc, &rb_rsrc_ops);
2690 zip->central_directory_entries_total = 0;
2692 struct zip_entry *zip_entry;
2693 size_t filename_length, extra_length, comment_length;
2694 uint32_t external_attributes;
2695 const char *name, *r;
2697 if ((p = __archive_read_ahead(a, 4, NULL)) == NULL)
2698 return ARCHIVE_FATAL;
2699 if (memcmp(p, "PK\006\006", 4) == 0
2700 || memcmp(p, "PK\005\006", 4) == 0) {
2702 } else if (memcmp(p, "PK\001\002", 4) != 0) {
2703 archive_set_error(&a->archive,
2704 -1, "Invalid central directory signature");
2705 return ARCHIVE_FATAL;
2707 if ((p = __archive_read_ahead(a, 46, NULL)) == NULL)
2708 return ARCHIVE_FATAL;
2710 zip_entry = calloc(1, sizeof(struct zip_entry));
2711 zip_entry->next = zip->zip_entries;
2712 zip_entry->flags |= LA_FROM_CENTRAL_DIRECTORY;
2713 zip->zip_entries = zip_entry;
2714 zip->central_directory_entries_total++;
2716 /* version = p[4]; */
2717 zip_entry->system = p[5];
2718 /* version_required = archive_le16dec(p + 6); */
2719 zip_entry->zip_flags = archive_le16dec(p + 8);
2720 if (zip_entry->zip_flags
2721 & (ZIP_ENCRYPTED | ZIP_STRONG_ENCRYPTED)){
2722 zip->has_encrypted_entries = 1;
2724 zip_entry->compression = (char)archive_le16dec(p + 10);
2725 zip_entry->mtime = zip_time(p + 12);
2726 zip_entry->crc32 = archive_le32dec(p + 16);
2727 if (zip_entry->zip_flags & ZIP_LENGTH_AT_END)
2728 zip_entry->decdat = p[13];
2730 zip_entry->decdat = p[19];
2731 zip_entry->compressed_size = archive_le32dec(p + 20);
2732 zip_entry->uncompressed_size = archive_le32dec(p + 24);
2733 filename_length = archive_le16dec(p + 28);
2734 extra_length = archive_le16dec(p + 30);
2735 comment_length = archive_le16dec(p + 32);
2736 /* disk_start = archive_le16dec(p + 34); */ /* Better be zero. */
2737 /* internal_attributes = archive_le16dec(p + 36); */ /* text bit */
2738 external_attributes = archive_le32dec(p + 38);
2739 zip_entry->local_header_offset =
2740 archive_le32dec(p + 42) + correction;
2742 /* If we can't guess the mode, leave it zero here;
2743 when we read the local file header we might get
2744 more information. */
2745 if (zip_entry->system == 3) {
2746 zip_entry->mode = external_attributes >> 16;
2747 } else if (zip_entry->system == 0) {
2748 // Interpret MSDOS directory bit
2749 if (0x10 == (external_attributes & 0x10)) {
2750 zip_entry->mode = AE_IFDIR | 0775;
2752 zip_entry->mode = AE_IFREG | 0664;
2754 if (0x01 == (external_attributes & 0x01)) {
2755 // Read-only bit; strip write permissions
2756 zip_entry->mode &= 0555;
2759 zip_entry->mode = 0;
2762 /* We're done with the regular data; get the filename and
2764 __archive_read_consume(a, 46);
2765 p = __archive_read_ahead(a, filename_length + extra_length,
2768 archive_set_error(&a->archive,
2769 ARCHIVE_ERRNO_FILE_FORMAT,
2770 "Truncated ZIP file header");
2771 return ARCHIVE_FATAL;
2773 if (ARCHIVE_OK != process_extra(a, p + filename_length, extra_length, zip_entry)) {
2774 return ARCHIVE_FATAL;
2778 * Mac resource fork files are stored under the
2779 * "__MACOSX/" directory, so we should check if
2782 if (!zip->process_mac_extensions) {
2783 /* Treat every entry as a regular entry. */
2784 __archive_rb_tree_insert_node(&zip->tree,
2788 r = rsrc_basename(name, filename_length);
2789 if (filename_length >= 9 &&
2790 strncmp("__MACOSX/", name, 9) == 0) {
2791 /* If this file is not a resource fork nor
2792 * a directory. We should treat it as a non
2793 * resource fork file to expose it. */
2794 if (name[filename_length-1] != '/' &&
2795 (r - name < 3 || r[0] != '.' || r[1] != '_')) {
2796 __archive_rb_tree_insert_node(
2797 &zip->tree, &zip_entry->node);
2798 /* Expose its parent directories. */
2799 expose_parent_dirs(zip, name,
2802 /* This file is a resource fork file or
2804 archive_strncpy(&(zip_entry->rsrcname),
2805 name, filename_length);
2806 __archive_rb_tree_insert_node(
2807 &zip->tree_rsrc, &zip_entry->node);
2810 /* Generate resource fork name to find its
2811 * resource file at zip->tree_rsrc. */
2812 archive_strcpy(&(zip_entry->rsrcname),
2814 archive_strncat(&(zip_entry->rsrcname),
2816 archive_strcat(&(zip_entry->rsrcname), "._");
2817 archive_strncat(&(zip_entry->rsrcname),
2819 filename_length - (r - name));
2820 /* Register an entry to RB tree to sort it by
2822 __archive_rb_tree_insert_node(&zip->tree,
2827 /* Skip the comment too ... */
2828 __archive_read_consume(a,
2829 filename_length + extra_length + comment_length);
2836 zip_get_local_file_header_size(struct archive_read *a, size_t extra)
2839 ssize_t filename_length, extra_length;
2841 if ((p = __archive_read_ahead(a, extra + 30, NULL)) == NULL) {
2842 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
2843 "Truncated ZIP file header");
2844 return (ARCHIVE_WARN);
2848 if (memcmp(p, "PK\003\004", 4) != 0) {
2849 archive_set_error(&a->archive, -1, "Damaged Zip archive");
2850 return ARCHIVE_WARN;
2852 filename_length = archive_le16dec(p + 26);
2853 extra_length = archive_le16dec(p + 28);
2855 return (30 + filename_length + extra_length);
2859 zip_read_mac_metadata(struct archive_read *a, struct archive_entry *entry,
2860 struct zip_entry *rsrc)
2862 struct zip *zip = (struct zip *)a->format->data;
2863 unsigned char *metadata, *mp;
2864 int64_t offset = archive_filter_bytes(&a->archive, 0);
2865 size_t remaining_bytes, metadata_bytes;
2867 int ret = ARCHIVE_OK, eof;
2869 switch(rsrc->compression) {
2870 case 0: /* No compression. */
2871 if (rsrc->uncompressed_size != rsrc->compressed_size) {
2872 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
2873 "Malformed OS X metadata entry: inconsistent size");
2874 return (ARCHIVE_FATAL);
2877 case 8: /* Deflate compression. */
2880 default: /* Unsupported compression. */
2881 /* Return a warning. */
2882 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
2883 "Unsupported ZIP compression method (%s)",
2884 compression_name(rsrc->compression));
2885 /* We can't decompress this entry, but we will
2886 * be able to skip() it and try the next entry. */
2887 return (ARCHIVE_WARN);
2890 if (rsrc->uncompressed_size > (4 * 1024 * 1024)) {
2891 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
2892 "Mac metadata is too large: %jd > 4M bytes",
2893 (intmax_t)rsrc->uncompressed_size);
2894 return (ARCHIVE_WARN);
2896 if (rsrc->compressed_size > (4 * 1024 * 1024)) {
2897 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
2898 "Mac metadata is too large: %jd > 4M bytes",
2899 (intmax_t)rsrc->compressed_size);
2900 return (ARCHIVE_WARN);
2903 metadata = malloc((size_t)rsrc->uncompressed_size);
2904 if (metadata == NULL) {
2905 archive_set_error(&a->archive, ENOMEM,
2906 "Can't allocate memory for Mac metadata");
2907 return (ARCHIVE_FATAL);
2910 if (offset < rsrc->local_header_offset)
2911 __archive_read_consume(a, rsrc->local_header_offset - offset);
2912 else if (offset != rsrc->local_header_offset) {
2913 __archive_read_seek(a, rsrc->local_header_offset, SEEK_SET);
2916 hsize = zip_get_local_file_header_size(a, 0);
2917 __archive_read_consume(a, hsize);
2919 remaining_bytes = (size_t)rsrc->compressed_size;
2920 metadata_bytes = (size_t)rsrc->uncompressed_size;
2923 while (!eof && remaining_bytes) {
2924 const unsigned char *p;
2925 ssize_t bytes_avail;
2928 p = __archive_read_ahead(a, 1, &bytes_avail);
2930 archive_set_error(&a->archive,
2931 ARCHIVE_ERRNO_FILE_FORMAT,
2932 "Truncated ZIP file header");
2934 goto exit_mac_metadata;
2936 if ((size_t)bytes_avail > remaining_bytes)
2937 bytes_avail = remaining_bytes;
2938 switch(rsrc->compression) {
2939 case 0: /* No compression. */
2940 if ((size_t)bytes_avail > metadata_bytes)
2941 bytes_avail = metadata_bytes;
2942 memcpy(mp, p, bytes_avail);
2943 bytes_used = (size_t)bytes_avail;
2944 metadata_bytes -= bytes_used;
2946 if (metadata_bytes == 0)
2950 case 8: /* Deflate compression. */
2954 ret = zip_deflate_init(a, zip);
2955 if (ret != ARCHIVE_OK)
2956 goto exit_mac_metadata;
2957 zip->stream.next_in =
2958 (Bytef *)(uintptr_t)(const void *)p;
2959 zip->stream.avail_in = (uInt)bytes_avail;
2960 zip->stream.total_in = 0;
2961 zip->stream.next_out = mp;
2962 zip->stream.avail_out = (uInt)metadata_bytes;
2963 zip->stream.total_out = 0;
2965 r = inflate(&zip->stream, 0);
2973 archive_set_error(&a->archive, ENOMEM,
2974 "Out of memory for ZIP decompression");
2975 ret = ARCHIVE_FATAL;
2976 goto exit_mac_metadata;
2978 archive_set_error(&a->archive,
2980 "ZIP decompression failed (%d)", r);
2981 ret = ARCHIVE_FATAL;
2982 goto exit_mac_metadata;
2984 bytes_used = zip->stream.total_in;
2985 metadata_bytes -= zip->stream.total_out;
2986 mp += zip->stream.total_out;
2994 __archive_read_consume(a, bytes_used);
2995 remaining_bytes -= bytes_used;
2997 archive_entry_copy_mac_metadata(entry, metadata,
2998 (size_t)rsrc->uncompressed_size - metadata_bytes);
3001 __archive_read_seek(a, offset, SEEK_SET);
3002 zip->decompress_init = 0;
3008 archive_read_format_zip_seekable_read_header(struct archive_read *a,
3009 struct archive_entry *entry)
3011 struct zip *zip = (struct zip *)a->format->data;
3012 struct zip_entry *rsrc;
3014 int r, ret = ARCHIVE_OK;
3017 * It should be sufficient to call archive_read_next_header() for
3018 * a reader to determine if an entry is encrypted or not. If the
3019 * encryption of an entry is only detectable when calling
3020 * archive_read_data(), so be it. We'll do the same check there
3023 if (zip->has_encrypted_entries ==
3024 ARCHIVE_READ_FORMAT_ENCRYPTION_DONT_KNOW)
3025 zip->has_encrypted_entries = 0;
3027 a->archive.archive_format = ARCHIVE_FORMAT_ZIP;
3028 if (a->archive.archive_format_name == NULL)
3029 a->archive.archive_format_name = "ZIP";
3031 if (zip->zip_entries == NULL) {
3032 r = slurp_central_directory(a, zip);
3033 if (r != ARCHIVE_OK)
3035 /* Get first entry whose local header offset is lower than
3036 * other entries in the archive file. */
3038 (struct zip_entry *)ARCHIVE_RB_TREE_MIN(&zip->tree);
3039 } else if (zip->entry != NULL) {
3040 /* Get next entry in local header offset order. */
3041 zip->entry = (struct zip_entry *)__archive_rb_tree_iterate(
3042 &zip->tree, &zip->entry->node, ARCHIVE_RB_DIR_RIGHT);
3045 if (zip->entry == NULL)
3048 if (zip->entry->rsrcname.s)
3049 rsrc = (struct zip_entry *)__archive_rb_tree_find_node(
3050 &zip->tree_rsrc, zip->entry->rsrcname.s);
3054 if (zip->cctx_valid)
3055 archive_decrypto_aes_ctr_release(&zip->cctx);
3056 if (zip->hctx_valid)
3057 archive_hmac_sha1_cleanup(&zip->hctx);
3058 zip->tctx_valid = zip->cctx_valid = zip->hctx_valid = 0;
3059 __archive_read_reset_passphrase(a);
3061 /* File entries are sorted by the header offset, we should mostly
3062 * use __archive_read_consume to advance a read point to avoid redundant
3064 offset = archive_filter_bytes(&a->archive, 0);
3065 if (offset < zip->entry->local_header_offset)
3066 __archive_read_consume(a,
3067 zip->entry->local_header_offset - offset);
3068 else if (offset != zip->entry->local_header_offset) {
3069 __archive_read_seek(a, zip->entry->local_header_offset,
3072 zip->unconsumed = 0;
3073 r = zip_read_local_file_header(a, entry, zip);
3074 if (r != ARCHIVE_OK)
3077 int ret2 = zip_read_mac_metadata(a, entry, rsrc);
3085 * We're going to seek for the next header anyway, so we don't
3086 * need to bother doing anything here.
3089 archive_read_format_zip_read_data_skip_seekable(struct archive_read *a)
3092 zip = (struct zip *)(a->format->data);
3094 zip->unconsumed = 0;
3095 return (ARCHIVE_OK);
3099 archive_read_support_format_zip_seekable(struct archive *_a)
3101 struct archive_read *a = (struct archive_read *)_a;
3105 archive_check_magic(_a, ARCHIVE_READ_MAGIC,
3106 ARCHIVE_STATE_NEW, "archive_read_support_format_zip_seekable");
3108 zip = (struct zip *)calloc(1, sizeof(*zip));
3110 archive_set_error(&a->archive, ENOMEM,
3111 "Can't allocate zip data");
3112 return (ARCHIVE_FATAL);
3115 #ifdef HAVE_COPYFILE_H
3116 /* Set this by default on Mac OS. */
3117 zip->process_mac_extensions = 1;
3121 * Until enough data has been read, we cannot tell about
3122 * any encrypted entries yet.
3124 zip->has_encrypted_entries = ARCHIVE_READ_FORMAT_ENCRYPTION_DONT_KNOW;
3125 zip->crc32func = real_crc32;
3127 r = __archive_read_register_format(a,
3130 archive_read_format_zip_seekable_bid,
3131 archive_read_format_zip_options,
3132 archive_read_format_zip_seekable_read_header,
3133 archive_read_format_zip_read_data,
3134 archive_read_format_zip_read_data_skip_seekable,
3136 archive_read_format_zip_cleanup,
3137 archive_read_support_format_zip_capabilities_seekable,
3138 archive_read_format_zip_has_encrypted_entries);
3140 if (r != ARCHIVE_OK)
3142 return (ARCHIVE_OK);