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/*
* 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 immediately at the beginning of the file, without modification,
* 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 AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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.
*/
/*
* LLVM fuzzing integration.
*/
#include "file.h"
#ifndef lint
FILE_RCSID("@(#)$File: magic_fuzzer.c,v 1.3 2022/09/24 20:30:13 christos Exp $")
#endif /* lint */
#include "magic.h"
#include <libgen.h>
#include <stdlib.h>
#include <err.h>
int LLVMFuzzerInitialize(int *, char ***);
int LLVMFuzzerTestOneInput(const uint8_t *, size_t);
static magic_t magic;
int
LLVMFuzzerInitialize(int *argc, char ***argv)
{
char dfile[MAXPATHLEN], mfile[MAXPATHLEN];
magic = magic_open(MAGIC_NONE);
if (magic == NULL) {
warn("magic_open");
return -1;
}
// Poor man's strlcpy(3), to avoid potentially destructive dirname(3)
snprintf(dfile, sizeof(dfile), "%s", (*argv)[0]);
snprintf(mfile, sizeof(mfile), "%s/magic", dirname(dfile));
if (magic_load(magic, mfile) == -1) {
warnx("magic_load: %s", magic_error(magic));
return -1;
}
return 0;
}
int
LLVMFuzzerTestOneInput(const uint8_t* data, size_t size)
{
if (size == 0)
return 0;
magic_buffer(magic, data, size);
return 0;
}
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