1 /* Copyright (c) 2016, Google Inc.
2 *
3 * Permission to use, copy, modify, and/or distribute this software for any
4 * purpose with or without fee is hereby granted, provided that the above
5 * copyright notice and this permission notice appear in all copies.
6 *
7 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
8 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
9 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
10 * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
11 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
12 * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
13 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */
14
15 #include <openssl/err.h>
16 #include <openssl/mem.h>
17 #include <openssl/x509.h>
18
19 #include "../crypto/x509v3/internal.h"
20
LLVMFuzzerTestOneInput(const uint8_t * buf,size_t len)21 extern "C" int LLVMFuzzerTestOneInput(const uint8_t *buf, size_t len) {
22 X509 *x509 = d2i_X509(NULL, &buf, len);
23 if (x509 != NULL) {
24 // Extract the public key.
25 EVP_PKEY_free(X509_get_pubkey(x509));
26
27 // Fuzz some deferred parsing.
28 x509v3_cache_extensions(x509);
29
30 // Reserialize the structure.
31 uint8_t *der = NULL;
32 i2d_X509(x509, &der);
33 OPENSSL_free(der);
34
35 BIO *bio = BIO_new(BIO_s_mem());
36 X509_print(bio, x509);
37 BIO_free(bio);
38 }
39 X509_free(x509);
40 ERR_clear_error();
41 return 0;
42 }
43