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/**file test-fuzzer-persistent.c
* from test-parse.c and test-mnote.c
*
* \brief Persistent AFL fuzzing binary (reaches 4 digits execs / second)
*
* Copyright (C) 2007 Hans Ulrich Niedermann <gp@n-dimensional.de>
* Copyright 2002 Lutz Mueller <lutz@users.sourceforge.net>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301 USA.
*
* SPDX-License-Identifier: LGPL-2.0-or-later
*/
#include <string.h>
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/stat.h>
#include "libexif/exif-data.h"
#include "libexif/exif-loader.h"
#include "libexif/exif-system.h"
__AFL_FUZZ_INIT();
#undef USE_LOG
#ifdef USE_LOG
static void
logfunc(ExifLog *log, ExifLogCode code, const char *domain, const char *format, va_list args, void *data)
{
fprintf( stderr, "test-fuzzer: code=%d domain=%s ", code, domain);
vfprintf (stderr, format, args);
fprintf (stderr, "\n");
}
#endif
/** Callback function handling an ExifEntry. */
void content_foreach_func(ExifEntry *entry, void *callback_data);
void content_foreach_func(ExifEntry *entry, void *UNUSED(callback_data))
{
char buf[2001];
/* ensure \0 */
buf[sizeof(buf)-1] = 0;
buf[sizeof(buf)-2] = 0;
exif_tag_get_name(entry->tag);
exif_format_get_name(entry->format);
exif_entry_get_value(entry, buf, sizeof(buf)-1);
if (buf[sizeof(buf)-2] != 0) abort();
}
/** Callback function handling an ExifContent (corresponds 1:1 to an IFD). */
void data_foreach_func(ExifContent *content, void *callback_data);
void data_foreach_func(ExifContent *content, void *callback_data)
{
printf(" Content %p: ifd=%d\n", (void *)content, exif_content_get_ifd(content));
exif_content_foreach_entry(content, content_foreach_func, callback_data);
}
static int
test_exif_data (ExifData *d)
{
unsigned int i, c;
char v[1024];
ExifMnoteData *md;
fprintf (stdout, "Byte order: %s\n",
exif_byte_order_get_name (exif_data_get_byte_order (d)));
md = exif_data_get_mnote_data (d);
if (!md) {
fprintf (stderr, "Could not parse maker note!\n");
return 1;
}
exif_mnote_data_ref (md);
exif_mnote_data_unref (md);
c = exif_mnote_data_count (md);
for (i = 0; i < c; i++) {
const char *name = exif_mnote_data_get_name (md, i);
if (!name) continue;
exif_mnote_data_get_name (md, i);
exif_mnote_data_get_title (md, i);
exif_mnote_data_get_description (md, i);
exif_mnote_data_get_value (md, i, v, sizeof (v));
}
return 0;
}
/** Main program. */
int main(const int argc, const char *argv[])
{
int i;
ExifData *d;
ExifLoader *loader = exif_loader_new();
unsigned int xbuf_size;
unsigned char *xbuf;
FILE *f;
struct stat stbuf;
#ifdef USE_LOG
ExifLog *log = exif_log_new ();
exif_log_set_func(log, logfunc, NULL);
#endif
#ifdef __AFL_HAVE_MANUAL_CONTROL
__AFL_INIT();
#endif
unsigned char *buf = __AFL_FUZZ_TESTCASE_BUF; // must be after __AFL_INIT
// and before __AFL_LOOP!
while (__AFL_LOOP(10000)) {
int len = __AFL_FUZZ_TESTCASE_LEN; // don't use the macro directly in a call!
d = exif_data_new_from_data(buf, len);
/* try the exif loader */
#ifdef USE_LOG
exif_data_log (d, log);
#endif
exif_data_foreach_content(d, data_foreach_func, NULL);
test_exif_data (d);
xbuf = NULL;
exif_data_save_data (d, &xbuf, &xbuf_size);
free (xbuf);
exif_data_set_byte_order(d, EXIF_BYTE_ORDER_INTEL);
xbuf = NULL;
exif_data_save_data (d, &xbuf, &xbuf_size);
free (xbuf);
exif_data_unref(d);
#if 0
/* try the exif data writer ... different than the loader */
exif_loader_write(loader, buf, len);
d = exif_loader_get_data(loader);
exif_data_foreach_content(d, data_foreach_func, NULL);
test_exif_data (d);
exif_loader_unref(loader);
exif_data_unref(d);
#endif
}
return 0;
}
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