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