1 /*
2 * Copyright 2008-2016 The OpenSSL Project Authors. All Rights Reserved.
3 *
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
8 */
9
10 /* S/MIME signing example: 2 signers */
11 #include <openssl/pem.h>
12 #include <openssl/cms.h>
13 #include <openssl/err.h>
14
main(int argc,char ** argv)15 int main(int argc, char **argv)
16 {
17 BIO *in = NULL, *out = NULL, *tbio = NULL;
18 X509 *scert = NULL, *scert2 = NULL;
19 EVP_PKEY *skey = NULL, *skey2 = NULL;
20 CMS_ContentInfo *cms = NULL;
21 int ret = 1;
22
23 OpenSSL_add_all_algorithms();
24 ERR_load_crypto_strings();
25
26 tbio = BIO_new_file("signer.pem", "r");
27
28 if (!tbio)
29 goto err;
30
31 scert = PEM_read_bio_X509(tbio, NULL, 0, NULL);
32
33 BIO_reset(tbio);
34
35 skey = PEM_read_bio_PrivateKey(tbio, NULL, 0, NULL);
36
37 BIO_free(tbio);
38
39 tbio = BIO_new_file("signer2.pem", "r");
40
41 if (!tbio)
42 goto err;
43
44 scert2 = PEM_read_bio_X509(tbio, NULL, 0, NULL);
45
46 BIO_reset(tbio);
47
48 skey2 = PEM_read_bio_PrivateKey(tbio, NULL, 0, NULL);
49
50 if (!scert2 || !skey2)
51 goto err;
52
53 in = BIO_new_file("sign.txt", "r");
54
55 if (!in)
56 goto err;
57
58 cms = CMS_sign(NULL, NULL, NULL, in, CMS_STREAM | CMS_PARTIAL);
59
60 if (!cms)
61 goto err;
62
63 /* Add each signer in turn */
64
65 if (!CMS_add1_signer(cms, scert, skey, NULL, 0))
66 goto err;
67
68 if (!CMS_add1_signer(cms, scert2, skey2, NULL, 0))
69 goto err;
70
71 out = BIO_new_file("smout.txt", "w");
72 if (!out)
73 goto err;
74
75 /* NB: content included and finalized by SMIME_write_CMS */
76
77 if (!SMIME_write_CMS(out, cms, in, CMS_STREAM))
78 goto err;
79
80 ret = 0;
81
82 err:
83
84 if (ret) {
85 fprintf(stderr, "Error Signing Data\n");
86 ERR_print_errors_fp(stderr);
87 }
88
89 CMS_ContentInfo_free(cms);
90 X509_free(scert);
91 EVP_PKEY_free(skey);
92 X509_free(scert2);
93 EVP_PKEY_free(skey2);
94 BIO_free(in);
95 BIO_free(out);
96 BIO_free(tbio);
97 return ret;
98 }
99