fuzz/smime.c

   1 /*
   2  * Copyright 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 "fuzzer.h"
  12 #include <openssl/err.h>
  13 #include <openssl/pkcs7.h>
  14 #include <openssl/x509.h>
  15 #include <stdio.h>
  16
  17 int FuzzerInitialize(int *argc, char ***argv)
  18 {
  19     return 1;
  20 }
  21
  22 int FuzzerTestOneInput(const uint8_t *buf, size_t len)
  23 {
  24     BIO *b = BIO_new_mem_buf(buf, len);
  25     PKCS7 *p7 = SMIME_read_PKCS7(b, NULL);
  26
  27     if (p7 != NULL) {
  28         STACK_OF(PKCS7_SIGNER_INFO) *p7si = PKCS7_get_signer_info(p7);
  29         int i;
  30
  31         for (i = 0; i < sk_PKCS7_SIGNER_INFO_num(p7si); i++) {
  32             STACK_OF(X509_ALGOR) *algs;
  33
  34             PKCS7_cert_from_signer_info(p7,
  35                                         sk_PKCS7_SIGNER_INFO_value(p7si, i));
  36             algs = PKCS7_get_smimecap(sk_PKCS7_SIGNER_INFO_value(p7si, i));
  37             sk_X509_ALGOR_pop_free(algs, X509_ALGOR_free);
  38         }
  39         PKCS7_free(p7);
  40     }
  41
  42     BIO_free(b);
  43     ERR_clear_error();
  44     return 0;
  45 }
  46
  47 void FuzzerCleanup(void)
  48 {
  49 }