samba-mirror/lib/fuzzing/fuzz_ldb_parse_binary_decode.c

/*
   Fuzzing ldb_binary_decode and ldb_binary_encode_string
   Copyright (C) Catalyst IT 2020

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 3 of the License, or
   (at your option) any later version.

   This program 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 General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/
#include "includes.h"
#include "fuzzing/fuzzing.h"
#include "ldb_private.h"


#define MAX_LENGTH (2 * 1024 * 1024 - 1)
char buf[MAX_LENGTH + 1] = {0};

static char * possibly_truncate(uint8_t *input, size_t len)
{
	if (len > MAX_LENGTH) {
		len = MAX_LENGTH;
	}
	memcpy(buf, input, len);
	buf[len] = 0;
	return buf;
}


int LLVMFuzzerTestOneInput(uint8_t *input, size_t len)
{
	TALLOC_CTX *mem_ctx = talloc_init(__FUNCTION__);
	struct ldb_val val = {0};
	const char *s = possibly_truncate(input, len);

	/* we treat the same string to encoding and decoding, not
	 * round-tripping. */
	val = ldb_binary_decode(mem_ctx, s);
	ldb_binary_encode_string(mem_ctx, s);
	TALLOC_FREE(mem_ctx);
	return 0;
}


int LLVMFuzzerInitialize(int *argc, char ***argv)
{
	return 0;
}