1 /*
2 * Copyright 2016-2021 The OpenSSL Project Authors. All Rights Reserved.
3 *
4 * Licensed under the Apache License 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 * https://www.openssl.org/source/license.html
8 * or in the file LICENSE in the source distribution.
9 */
10
11 /*
12 * Fuzz the parser used for dumping ASN.1 using "openssl asn1parse".
13 */
14
15 #include <stdio.h>
16 #include <openssl/asn1.h>
17 #include <openssl/x509.h>
18 #include <openssl/x509v3.h>
19 #include <openssl/err.h>
20 #include "fuzzer.h"
21
22 static BIO *bio_out;
23
FuzzerInitialize(int * argc,char *** argv)24 int FuzzerInitialize(int *argc, char ***argv)
25 {
26 bio_out = BIO_new(BIO_s_null()); /* output will be ignored */
27 if (bio_out == NULL)
28 return 0;
29 OPENSSL_init_crypto(OPENSSL_INIT_LOAD_CRYPTO_STRINGS, NULL);
30 ERR_clear_error();
31 CRYPTO_free_ex_index(0, -1);
32 return 1;
33 }
34
FuzzerTestOneInput(const uint8_t * buf,size_t len)35 int FuzzerTestOneInput(const uint8_t *buf, size_t len)
36 {
37 (void)ASN1_parse_dump(bio_out, buf, len, 0, 0);
38 ERR_clear_error();
39 return 0;
40 }
41
FuzzerCleanup(void)42 void FuzzerCleanup(void)
43 {
44 BIO_free(bio_out);
45 }
46