1 /* S/MIME signing example: 2 signers */
2 #include <openssl/pem.h>
3 #include <openssl/cms.h>
4 #include <openssl/err.h>
6 int main(int argc, char **argv)
8 BIO *in = NULL, *out = NULL, *tbio = NULL;
9 X509 *scert = NULL, *scert2 = NULL;
10 EVP_PKEY *skey = NULL, *skey2 = NULL;
11 CMS_ContentInfo *cms = NULL;
14 OpenSSL_add_all_algorithms();
15 ERR_load_crypto_strings();
17 tbio = BIO_new_file("signer.pem", "r");
22 scert = PEM_read_bio_X509(tbio, NULL, 0, NULL);
26 skey = PEM_read_bio_PrivateKey(tbio, NULL, 0, NULL);
30 tbio = BIO_new_file("signer2.pem", "r");
35 scert2 = PEM_read_bio_X509(tbio, NULL, 0, NULL);
39 skey2 = PEM_read_bio_PrivateKey(tbio, NULL, 0, NULL);
41 if (!scert2 || !skey2)
44 in = BIO_new_file("sign.txt", "r");
49 cms = CMS_sign(NULL, NULL, NULL, in, CMS_STREAM|CMS_PARTIAL);
54 /* Add each signer in turn */
56 if (!CMS_add1_signer(cms, scert, skey, NULL, 0))
59 if (!CMS_add1_signer(cms, scert2, skey2, NULL, 0))
62 out = BIO_new_file("smout.txt", "w");
66 /* NB: content included and finalized by SMIME_write_CMS */
68 if (!SMIME_write_CMS(out, cms, in, CMS_STREAM))
77 fprintf(stderr, "Error Signing Data\n");
78 ERR_print_errors_fp(stderr);
82 CMS_ContentInfo_free(cms);