2 * Copyright 2007-2023 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the Apache License 2.0 (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
10 /* Simple S/MIME signing example */
11 #include <openssl/pem.h>
12 #include <openssl/pkcs7.h>
13 #include <openssl/err.h>
15 int main(int argc, char **argv)
17 BIO *in = NULL, *out = NULL, *tbio = NULL;
19 EVP_PKEY *rkey = NULL;
21 int ret = EXIT_FAILURE;
23 OpenSSL_add_all_algorithms();
24 ERR_load_crypto_strings();
26 /* Read in recipient certificate and private key */
27 tbio = BIO_new_file("signer.pem", "r");
32 rcert = PEM_read_bio_X509(tbio, NULL, 0, NULL);
34 if (BIO_reset(tbio) < 0)
37 rkey = PEM_read_bio_PrivateKey(tbio, NULL, 0, NULL);
42 /* Open content being signed */
44 in = BIO_new_file("smencr.txt", "r");
50 p7 = SMIME_read_PKCS7(in, NULL);
55 out = BIO_new_file("encrout.txt", "w");
59 /* Decrypt S/MIME message */
60 if (!PKCS7_decrypt(p7, rkey, rcert, out, 0))
67 if (ret != EXIT_SUCCESS) {
68 fprintf(stderr, "Error Signing Data\n");
69 ERR_print_errors_fp(stderr);