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/* fuzzer_tool_flac
* Copyright (C) 2023 Xiph.Org Foundation
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - 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.
*
* - Neither the name of the Xiph.org Foundation nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 FOUNDATION 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.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h> /* for memcpy */
#define FUZZ_TOOL_METAFLAC
#define fprintf(...)
#define printf(...)
#include "../src/metaflac/main.c"
#include "common.h"
int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size);
int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
{
size_t size_left = size;
size_t arglen;
char * argv[64];
char exename[] = "metaflac";
char filename[] = "/tmp/fuzzXXXXXX";
char filename_stdin[] = "/tmp/fuzzXXXXXX";
int numarg = 0, maxarg;
int file_to_fuzz;
int tmp_stdout, tmp_stdin;
fpos_t pos_stdout;
bool use_stdin = false;
share__opterr = 0;
share__optind = 0;
if(size < 2)
return 0;
maxarg = data[0] & 15;
use_stdin = data[0] & 16;
size_left--;
argv[0] = exename;
numarg++;
/* Check whether input is zero delimited */
while((arglen = strnlen((char *)data+(size-size_left),size_left)) < size_left && numarg < maxarg) {
argv[numarg++] = (char *)data+(size-size_left);
size_left -= arglen + 1;
}
/* Create file to feed directly */
file_to_fuzz = mkstemp(filename);
if (file_to_fuzz < 0)
abort();
if(use_stdin) {
write(file_to_fuzz,data+(size-size_left),size_left/2);
size_left -= size_left/2;
}
else
write(file_to_fuzz,data+(size-size_left),size_left);
close(file_to_fuzz);
argv[numarg++] = filename;
/* Create file to feed to stdin */
if(use_stdin) {
file_to_fuzz = mkstemp(filename_stdin);
if (file_to_fuzz < 0)
abort();
write(file_to_fuzz,data+(size-size_left),size_left);
close(file_to_fuzz);
}
/* redirect stdout */
fflush(stdout);
fgetpos(stdout,&pos_stdout);
tmp_stdout = dup(fileno(stdout));
freopen("/dev/null","w",stdout);
/* redirect stdin */
tmp_stdin = dup(fileno(stdin));
if(use_stdin)
freopen(filename_stdin,"r",stdin);
else {
freopen("/dev/null","r",stdin);
argv[numarg++] = filename;
}
main_to_fuzz(numarg,argv);
/* restore stdout */
fflush(stdout);
dup2(tmp_stdout, fileno(stdout));
close(tmp_stdout);
clearerr(stdout);
fsetpos(stdout,&pos_stdout);
/* restore stdin */
dup2(tmp_stdin, fileno(stdin));
close(tmp_stdin);
clearerr(stdin);
unlink(filename);
if(use_stdin)
unlink(filename_stdin);
return 0;
}
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