fuzz/pem.c

   1 /*
   2  * Copyright 2022-2023 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 #include <openssl/pem.h>
  12 #include <openssl/err.h>
  13 #include "fuzzer.h"
  14
  15 int FuzzerInitialize(int *argc, char ***argv)
  16 {
  17     OPENSSL_init_crypto(OPENSSL_INIT_LOAD_CRYPTO_STRINGS, NULL);
  18     ERR_clear_error();
  19     CRYPTO_free_ex_index(0, -1);
  20     return 1;
  21 }
  22
  23 int FuzzerTestOneInput(const uint8_t *buf, size_t len)
  24 {
  25     BIO *in;
  26     char *name = NULL, *header = NULL;
  27     unsigned char *data = NULL;
  28     long outlen;
  29
  30     if (len <= 1)
  31         return 0;
  32
  33     in = BIO_new(BIO_s_mem());
  34     OPENSSL_assert((size_t)BIO_write(in, buf + 1, len - 1) == len - 1);
  35     if (PEM_read_bio_ex(in, &name, &header, &data, &outlen, buf[0]) == 1) {
  36         /* Try to read all the data we get to see if allocated properly. */
  37         BIO_write(in, name, strlen(name));
  38         BIO_write(in, header, strlen(header));
  39         BIO_write(in, data, outlen);
  40     }
  41     if (buf[0] & PEM_FLAG_SECURE) {
  42         OPENSSL_secure_free(name);
  43         OPENSSL_secure_free(header);
  44         OPENSSL_secure_free(data);
  45     } else {
  46         OPENSSL_free(name);
  47         OPENSSL_free(header);
  48         OPENSSL_free(data);
  49     }
  50
  51     BIO_free(in);
  52     ERR_clear_error();
  53
  54     return 0;
  55 }
  56
  57 void FuzzerCleanup(void)
  58 {
  59 }