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      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 }
     50