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/*-
* Copyright (c) 2003-2007 Tim Kientzle
* 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.
*/
#include "test.h"
__FBSDID("$FreeBSD$");
/*
* This was inspired by an ISO fuzz tester written by Michal Zalewski
* and posted to the "vulnwatch" mailing list on March 17, 2005:
* http://seclists.org/vulnwatch/2005/q1/0088.html
*
* This test simply reads each archive image into memory, pokes
* random values into it and runs it through libarchive. It tries
* to damage about 1% of each file and repeats the exercise 100 times
* with each file.
*
* Unlike most other tests, this test does not verify libarchive's
* responses other than to ensure that libarchive doesn't crash.
*
* Due to the deliberately random nature of this test, it may be hard
* to reproduce failures. Because this test deliberately attempts to
* induce crashes, there's little that can be done in the way of
* post-failure diagnostics.
*/
/* Because this works for any archive, we can just re-use the archives
* developed for other tests. */
static struct {
int uncompress; /* If 1, decompress the file before fuzzing. */
const char *name;
} files[] = {
{0, "test_fuzz_1.iso.Z"}, /* Exercise compress decompressor. */
{1, "test_fuzz_1.iso.Z"},
{0, "test_compat_bzip2_1.tbz"}, /* Exercise bzip2 decompressor. */
{1, "test_compat_bzip2_1.tbz"},
{0, "test_compat_gtar_1.tar"},
{0, "test_compat_gzip_1.tgz"}, /* Exercise gzip decompressor. */
{0, "test_compat_gzip_2.tgz"}, /* Exercise gzip decompressor. */
{0, "test_compat_tar_hardlink_1.tar"},
{0, "test_compat_xz_1.txz"}, /* Exercise xz decompressor. */
{0, "test_compat_zip_1.zip"},
{0, "test_read_format_ar.ar"},
{0, "test_read_format_cpio_bin_be.cpio"},
{0, "test_read_format_cpio_svr4_gzip_rpm.rpm"}, /* Test RPM unwrapper */
{0, "test_read_format_gtar_sparse_1_17_posix10_modified.tar"},
{0, "test_read_format_mtree.mtree"},
{0, "test_read_format_tar_empty_filename.tar"},
{0, "test_read_format_zip.zip"},
{1, NULL}
};
DEFINE_TEST(test_fuzz)
{
const void *blk;
size_t blk_size;
off_t blk_offset;
int n;
for (n = 0; files[n].name != NULL; ++n) {
const size_t buffsize = 30000000;
const char *filename = files[n].name;
struct archive_entry *ae;
struct archive *a;
char *rawimage, *image;
size_t size;
int i;
extract_reference_file(filename);
if (files[n].uncompress) {
int r;
/* Use format_raw to decompress the data. */
assert((a = archive_read_new()) != NULL);
assertEqualIntA(a, ARCHIVE_OK,
archive_read_support_compression_all(a));
assertEqualIntA(a, ARCHIVE_OK,
archive_read_support_format_raw(a));
r = archive_read_open_filename(a, filename, 16384);
if (r != ARCHIVE_OK) {
archive_read_finish(a);
skipping("Cannot uncompress %s", filename);
continue;
}
assertEqualIntA(a, ARCHIVE_OK,
archive_read_next_header(a, &ae));
rawimage = malloc(buffsize);
size = archive_read_data(a, rawimage, buffsize);
assertEqualIntA(a, ARCHIVE_EOF,
archive_read_next_header(a, &ae));
assertEqualInt(ARCHIVE_OK,
archive_read_finish(a));
assert(size > 0);
failure("Internal buffer is not big enough for "
"uncompressed test file: %s", filename);
if (!assert(size < buffsize)) {
free(rawimage);
continue;
}
} else {
rawimage = slurpfile(&size, filename);
if (!assert(rawimage != NULL))
continue;
}
image = malloc(size);
assert(image != NULL);
srand((unsigned)time(NULL));
for (i = 0; i < 100; ++i) {
FILE *f;
int j, numbytes;
/* Fuzz < 1% of the bytes in the archive. */
memcpy(image, rawimage, size);
numbytes = (int)(rand() % (size / 100));
for (j = 0; j < numbytes; ++j)
image[rand() % size] = (char)rand();
/* Save the messed-up image to a file.
* If we crash, that file will be useful. */
f = fopen("after.test.failure.send.this.file."
"to.libarchive.maintainers.with.system.details", "wb");
fwrite(image, 1, (size_t)size, f);
fclose(f);
assert((a = archive_read_new()) != NULL);
assertEqualIntA(a, ARCHIVE_OK,
archive_read_support_compression_all(a));
assertEqualIntA(a, ARCHIVE_OK,
archive_read_support_format_all(a));
if (0 == archive_read_open_memory(a, image, size)) {
while(0 == archive_read_next_header(a, &ae)) {
while (0 == archive_read_data_block(a,
&blk, &blk_size, &blk_offset))
continue;
}
archive_read_close(a);
}
archive_read_finish(a);
}
free(image);
free(rawimage);
}
}
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