fuzz/asn1_decode_simple_ber_fuzzer.c

/*
 * Copyright(c) 2020 Free Software Foundation, Inc.
 *
 * This file is part of libtasn1.
 *
 * Libtasn1 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 3 of the License, or
 * (at your option) any later version.
 *
 * Libtasn1 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 libtasn1.  If not, see <https://www.gnu.org/licenses/>.
 *
 * This fuzzer is testing asn1_array2tree()'s robustness with arbitrary
 * input data.
 */

#include <config.h>
#include <assert.h>
#include <stdlib.h>

#include "libtasn1.h"
#include "fuzzer.h"

int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
{
	int ret;
	unsigned int ret_len;
	unsigned char *str;

	ret = asn1_decode_simple_ber(ASN1_ETYPE_BIT_STRING, data, size, &str, &ret_len, NULL);
	if (ret == ASN1_SUCCESS) {
		free(str);
		assert(ret_len <= size);
	}

	ret = asn1_decode_simple_ber(ASN1_ETYPE_OCTET_STRING, data, size, &str, &ret_len, NULL);
	if (ret == ASN1_SUCCESS) {
		free(str);
		assert(ret_len <= size);
	}

	return 0;
}