fuzz/asn1parse.c

   1 /*
   2  * Copyright 2016 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
  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
  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
  42 void FuzzerCleanup(void)
  43 {
  44     BIO_free(bio_out);
  45 }