/*-
* Copyright (c) 2003-2008 Tim Kientzle
* Copyright (c) 2008 Anselm Strauss
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/*
* Development supported by Google Summer of Code 2008.
*/
#include "test.h"
__FBSDID("$FreeBSD: head/lib/libarchive/test/test_write_format_zip.c 201247 2009-12-30 05:59:21Z kientzle $");
/*
* Detailed byte-for-byte verification of the format of a zip archive
* with a single file written to it that uses Zip64 extensions.
*/
static unsigned long
bitcrc32(unsigned long c, void *_p, size_t s)
{
/* This is a drop-in replacement for crc32() from zlib.
* Libarchive should be able to correctly generate
* uncompressed zip archives (including correct CRCs) even
* when zlib is unavailable, and this function helps us verify
* that. Yes, this is very, very slow and unsuitable for
* production use, but it's correct, compact, and works well
* enough for this particular usage. Libarchive internally
* uses a much more efficient implementation. */
const unsigned char *p = _p;
int bitctr;
if (p == NULL)
return (0);
for (; s > 0; --s) {
c ^= *p++;
for (bitctr = 8; bitctr > 0; --bitctr) {
if (c & 1) c = (c >> 1);
else c = (c >> 1) ^ 0xedb88320;
c ^= 0x80000000;
}
}
return (c);
}
/* Quick and dirty: Read 2-byte and 4-byte integers from Zip file. */
static unsigned i2(const unsigned char *p) { return ((p[0] & 0xff) | ((p[1] & 0xff) << 8)); }
static unsigned i4(const unsigned char *p) { return (i2(p) | (i2(p + 2) << 16)); }
/* We're only working with small values here; ignore the 4 high bytes. */
static unsigned i8(const unsigned char *p) { return (i4(p)); }
DEFINE_TEST(test_write_format_zip_file_zip64)
{
struct archive *a;
struct archive_entry *ae;
time_t t = 1234567890;
struct tm *tm = localtime(&t);
size_t used, buffsize = 1000000;
unsigned long crc;
int file_perm = 00644;
int zip_version = 45;
int zip_compression = 8;
short file_uid = 10, file_gid = 20;
unsigned char *buff, *buffend, *p;
unsigned char *central_header, *local_header, *eocd, *eocd_record;
unsigned char *extension_start, *extension_end;
char file_data[] = {'1', '2', '3', '4', '5', '6', '7', '8'};
char *file_name = "file";
#ifndef HAVE_ZLIB_H
zip_compression = 0;
#endif
buff = malloc(buffsize);
/* Create a new archive in memory. */
assert((a = archive_write_new()) != NULL);
assertEqualIntA(a, ARCHIVE_OK, archive_write_set_format_zip(a));
assertEqualIntA(a, ARCHIVE_OK,
archive_write_set_options(a, "zip:zip64"));
assertEqualIntA(a, ARCHIVE_OK,
archive_write_set_options(a, "zip:experimental"));
assertEqualIntA(a, ARCHIVE_OK,
archive_write_open_memory(a, buff, buffsize, &used));
assert((ae = archive_entry_new()) != NULL);
archive_entry_copy_pathname(ae, file_name);
archive_entry_set_mode(ae, AE_IFREG | file_perm);
archive_entry_set_size(ae, sizeof(file_data));
archive_entry_set_uid(ae, file_uid);
archive_entry_set_gid(ae, file_gid);
archive_entry_set_mtime(ae, t, 0);
assertEqualInt(0, archive_write_header(a, ae));
archive_entry_free(ae);
assertEqualInt(8, archive_write_data(a, file_data, sizeof(file_data)));
assertEqualIntA(a, ARCHIVE_OK, archive_write_close(a));
assertEqualInt(ARCHIVE_OK, archive_write_free(a));
buffend = buff + used;
dumpfile("constructed.zip", buff, used);
/* Verify "End of Central Directory" record. */
/* Get address of end-of-central-directory record. */
eocd_record = p = buffend - 22; /* Assumes there is no zip comment field. */
failure("End-of-central-directory begins with PK\\005\\006 signature");
assertEqualMem(p, "PK\005\006", 4);
failure("This must be disk 0");
assertEqualInt(i2(p + 4), 0);
failure("Central dir must start on disk 0");
assertEqualInt(i2(p + 6), 0);
failure("All central dir entries are on this disk");
assertEqualInt(i2(p + 8), i2(p + 10));
eocd = buff + i4(p + 12) + i4(p + 16);
failure("no zip comment");
assertEqualInt(i2(p + 20), 0);
/* Get address of first entry in central directory. */
central_header = p = buff + i4(buffend - 6);
failure("Central file record at offset %d should begin with"
" PK\\001\\002 signature",
i4(buffend - 10));
/* Verify file entry in central directory. */
assertEqualMem(p, "PK\001\002", 4); /* Signature */
assertEqualInt(i2(p + 4), 3 * 256 + zip_version); /* Version made by */
assertEqualInt(i2(p + 6), zip_version); /* Version needed to extract */
assertEqualInt(i2(p + 8), 8); /* Flags */
assertEqualInt(i2(p + 10), zip_compression); /* Compression method */
assertEqualInt(i2(p + 12), (tm->tm_hour * 2048) + (tm->tm_min * 32) + (tm->tm_sec / 2)); /* File time */
assertEqualInt(i2(p + 14), ((tm->tm_year - 80) * 512) + ((tm->tm_mon + 1) * 32) + tm->tm_mday); /* File date */
crc = bitcrc32(0, file_data, sizeof(file_data));
assertEqualInt(i4(p + 16), crc); /* CRC-32 */
/* assertEqualInt(i4(p + 20), sizeof(file_data)); */ /* Compressed size */
assertEqualInt(i4(p + 24), sizeof(file_data)); /* Uncompressed size */
assertEqualInt(i2(p + 28), strlen(file_name)); /* Pathname length */
/* assertEqualInt(i2(p + 30), 28); */ /* Extra field length: See below */
assertEqualInt(i2(p + 32), 0); /* File comment length */
assertEqualInt(i2(p + 34), 0); /* Disk number start */
assertEqualInt(i2(p + 36), 0); /* Internal file attrs */
assertEqualInt(i4(p + 38) >> 16 & 01777, file_perm); /* External file attrs */
assertEqualInt(i4(p + 42), 0); /* Offset of local header */
assertEqualMem(p + 46, file_name, strlen(file_name)); /* Pathname */
p = extension_start = central_header + 46 + strlen(file_name);
extension_end = extension_start + i2(central_header + 30);
assertEqualInt(i2(p), 0x5455); /* 'UT' extension header */
assertEqualInt(i2(p + 2), 5); /* 'UT' size */
assertEqualInt(p[4], 1); /* 'UT' flags */
assertEqualInt(i4(p + 5), t); /* 'UT' mtime */
p += 4 + i2(p + 2);
assertEqualInt(i2(p), 0x7875); /* 'ux' extension header */
assertEqualInt(i2(p + 2), 11); /* 'ux' size */
/* TODO: verify 'ux' contents */
p += 4 + i2(p + 2);
/* Note: We don't expect to see zip64 extension in the central
* directory, since the writer knows the actual full size by
* the time it is ready to write the central directory and has
* no reason to insert it then. Info-Zip seems to do the same
* thing. */
/* Just in case: Report any extra extensions. */
while (p < extension_end) {
failure("Unexpected extension 0x%04X", i2(p));
assert(0);
p += 4 + i2(p + 2);
}
/* Should have run exactly to end of extra data. */
assert(p == extension_end);
assert(p == eocd);
/* After Central dir, we find Zip64 eocd and Zip64 eocd locator. */
assertEqualMem(p, "PK\006\006", 4); /* Zip64 eocd */
assertEqualInt(i8(p + 4), 44); /* We're using v1 Zip64 eocd */
assertEqualInt(i2(p + 12), 45); /* Written by Version 4.5 */
assertEqualInt(i2(p + 14), 45); /* Needs version 4.5 to extract */
assertEqualInt(i4(p + 16), 0); /* This is disk #0 */
assertEqualInt(i4(p + 20), 0); /* Dir starts on disk #0 */
assertEqualInt(i8(p + 24), 1); /* 1 entry on this disk */
assertEqualInt(i8(p + 32), 1); /* 1 entry total */
assertEqualInt(i8(p + 40), eocd - central_header); /* size of cd */
assertEqualInt(i8(p + 48), central_header - buff); /* start of cd */
p += 12 + i8(p + 4);
assertEqualMem(p, "PK\006\007", 4); /* Zip64 eocd locator */
assertEqualInt(i4(p + 4), 0); /* Zip64 eocd is on disk #0 */
assertEqualInt(i8(p + 8), eocd - buff); /* Offset of Zip64 eocd */
assertEqualInt(i4(p + 16), 1); /* 1 disk */
p += 20;
/* Regular EOCD immediately follows Zip64 records. */
assert(p == eocd_record);
/* Verify local header of file entry. */
p = local_header = buff;
assertEqualMem(p, "PK\003\004", 4); /* Signature */
assertEqualInt(i2(p + 4), zip_version); /* Version needed to extract */
assertEqualInt(i2(p + 6), 8); /* Flags */
assertEqualInt(i2(p + 8), zip_compression); /* Compression method */
assertEqualInt(i2(p + 10), (tm->tm_hour * 2048) + (tm->tm_min * 32) + (tm->tm_sec / 2)); /* File time */
assertEqualInt(i2(p + 12), ((tm->tm_year - 80) * 512) + ((tm->tm_mon + 1) * 32) + tm->tm_mday); /* File date */
assertEqualInt(i4(p + 14), 0); /* CRC-32 */
/* assertEqualInt(i4(p + 18), sizeof(file_data)); */ /* Compressed size */
/* assertEqualInt(i4(p + 22), sizeof(file_data)); */ /* Uncompressed size not stored because we're using length-at-end. */
assertEqualInt(i2(p + 26), strlen(file_name)); /* Pathname length */
assertEqualInt(i2(p + 28), 57); /* Extra field length */
assertEqualMem(p + 30, file_name, strlen(file_name)); /* Pathname */
p = extension_start = local_header + 30 + strlen(file_name);
extension_end = extension_start + i2(local_header + 28);
assertEqualInt(i2(p), 0x5455); /* 'UT' extension header */
assertEqualInt(i2(p + 2), 5); /* 'UT' size */
assertEqualInt(p[4], 1); /* 'UT' flags */
assertEqualInt(i4(p + 5), t); /* 'UT' mtime */
p += 4 + i2(p + 2);
assertEqualInt(i2(p), 0x7875); /* 'ux' extension header */
assertEqualInt(i2(p + 2), 11); /* 'ux' size */
assertEqualInt(p[4], 1); /* 'ux' version */
assertEqualInt(p[5], 4); /* 'ux' uid size */
assertEqualInt(i4(p + 6), file_uid); /* 'Ux' UID */
assertEqualInt(p[10], 4); /* 'ux' gid size */
assertEqualInt(i4(p + 11), file_gid); /* 'Ux' GID */
p += 4 + i2(p + 2);
assertEqualInt(i2(p), 0x0001); /* Zip64 extension header */
assertEqualInt(i2(p + 2), 16); /* size */
assertEqualInt(i8(p + 4), 8); /* uncompressed file size */
/* compressed file size we can't verify here */
p += 4 + i2(p + 2);
assertEqualInt(i2(p), 0x6c78); /* 'xl' experimental extension header */
assertEqualInt(i2(p + 2), 9); /* size */
assertEqualInt(p[4], 7); /* bitmap of included fields */
assertEqualInt(i2(p + 5) >> 8, 3); /* system & version made by */
assertEqualInt(i2(p + 7), 0); /* internal file attributes */
assertEqualInt(i4(p + 9) >> 16 & 01777, file_perm); /* external file attributes */
p += 4 + i2(p + 2);
/* Just in case: Report any extra extensions. */
while (p < extension_end) {
failure("Unexpected extension 0x%04X", i2(p));
assert(0);
p += 4 + i2(p + 2);
}
/* Should have run exactly to end of extra data. */
assert(p == extension_end);
/* Data descriptor should follow compressed data. */
while (p < central_header && memcmp(p, "PK\007\010", 4) != 0)
++p;
assertEqualMem(p, "PK\007\010", 4);
assertEqualInt(i4(p + 4), crc); /* CRC-32 */
/* assertEqualInt(i8(p + 8), ???); */ /* compressed size */
assertEqualInt(i8(p + 16), sizeof(file_data)); /* uncompressed size */
/* Central directory should immediately follow the only entry. */
assert(p + 24 == central_header);
free(buff);
}