1*e0c4386eSCy Schubert /*
2*e0c4386eSCy Schubert * Copyright 2007-2016 The OpenSSL Project Authors. All Rights Reserved.
3*e0c4386eSCy Schubert *
4*e0c4386eSCy Schubert * Licensed under the Apache License 2.0 (the "License"). You may not use
5*e0c4386eSCy Schubert * this file except in compliance with the License. You can obtain a copy
6*e0c4386eSCy Schubert * in the file LICENSE in the source distribution or at
7*e0c4386eSCy Schubert * https://www.openssl.org/source/license.html
8*e0c4386eSCy Schubert */
9*e0c4386eSCy Schubert
10*e0c4386eSCy Schubert /* Simple S/MIME signing example */
11*e0c4386eSCy Schubert #include <openssl/pem.h>
12*e0c4386eSCy Schubert #include <openssl/pkcs7.h>
13*e0c4386eSCy Schubert #include <openssl/err.h>
14*e0c4386eSCy Schubert
main(int argc,char ** argv)15*e0c4386eSCy Schubert int main(int argc, char **argv)
16*e0c4386eSCy Schubert {
17*e0c4386eSCy Schubert BIO *in = NULL, *out = NULL, *tbio = NULL;
18*e0c4386eSCy Schubert X509 *rcert = NULL;
19*e0c4386eSCy Schubert EVP_PKEY *rkey = NULL;
20*e0c4386eSCy Schubert PKCS7 *p7 = NULL;
21*e0c4386eSCy Schubert int ret = 1;
22*e0c4386eSCy Schubert
23*e0c4386eSCy Schubert OpenSSL_add_all_algorithms();
24*e0c4386eSCy Schubert ERR_load_crypto_strings();
25*e0c4386eSCy Schubert
26*e0c4386eSCy Schubert /* Read in recipient certificate and private key */
27*e0c4386eSCy Schubert tbio = BIO_new_file("signer.pem", "r");
28*e0c4386eSCy Schubert
29*e0c4386eSCy Schubert if (!tbio)
30*e0c4386eSCy Schubert goto err;
31*e0c4386eSCy Schubert
32*e0c4386eSCy Schubert rcert = PEM_read_bio_X509(tbio, NULL, 0, NULL);
33*e0c4386eSCy Schubert
34*e0c4386eSCy Schubert BIO_reset(tbio);
35*e0c4386eSCy Schubert
36*e0c4386eSCy Schubert rkey = PEM_read_bio_PrivateKey(tbio, NULL, 0, NULL);
37*e0c4386eSCy Schubert
38*e0c4386eSCy Schubert if (!rcert || !rkey)
39*e0c4386eSCy Schubert goto err;
40*e0c4386eSCy Schubert
41*e0c4386eSCy Schubert /* Open content being signed */
42*e0c4386eSCy Schubert
43*e0c4386eSCy Schubert in = BIO_new_file("smencr.txt", "r");
44*e0c4386eSCy Schubert
45*e0c4386eSCy Schubert if (!in)
46*e0c4386eSCy Schubert goto err;
47*e0c4386eSCy Schubert
48*e0c4386eSCy Schubert /* Sign content */
49*e0c4386eSCy Schubert p7 = SMIME_read_PKCS7(in, NULL);
50*e0c4386eSCy Schubert
51*e0c4386eSCy Schubert if (!p7)
52*e0c4386eSCy Schubert goto err;
53*e0c4386eSCy Schubert
54*e0c4386eSCy Schubert out = BIO_new_file("encrout.txt", "w");
55*e0c4386eSCy Schubert if (!out)
56*e0c4386eSCy Schubert goto err;
57*e0c4386eSCy Schubert
58*e0c4386eSCy Schubert /* Decrypt S/MIME message */
59*e0c4386eSCy Schubert if (!PKCS7_decrypt(p7, rkey, rcert, out, 0))
60*e0c4386eSCy Schubert goto err;
61*e0c4386eSCy Schubert
62*e0c4386eSCy Schubert ret = 0;
63*e0c4386eSCy Schubert
64*e0c4386eSCy Schubert err:
65*e0c4386eSCy Schubert if (ret) {
66*e0c4386eSCy Schubert fprintf(stderr, "Error Signing Data\n");
67*e0c4386eSCy Schubert ERR_print_errors_fp(stderr);
68*e0c4386eSCy Schubert }
69*e0c4386eSCy Schubert PKCS7_free(p7);
70*e0c4386eSCy Schubert X509_free(rcert);
71*e0c4386eSCy Schubert EVP_PKEY_free(rkey);
72*e0c4386eSCy Schubert BIO_free(in);
73*e0c4386eSCy Schubert BIO_free(out);
74*e0c4386eSCy Schubert BIO_free(tbio);
75*e0c4386eSCy Schubert
76*e0c4386eSCy Schubert return ret;
77*e0c4386eSCy Schubert
78*e0c4386eSCy Schubert }
79