/*
|
* Copyright 2007-2016 The OpenSSL Project Authors. All Rights Reserved.
|
*
|
* Licensed under the OpenSSL license (the "License"). You may not use
|
* this file except in compliance with the License. You can obtain a copy
|
* in the file LICENSE in the source distribution or at
|
* https://www.openssl.org/source/license.html
|
*/
|
|
/* S/MIME signing example: 2 signers. OpenSSL 0.9.9 only */
|
#include <openssl/pem.h>
|
#include <openssl/pkcs7.h>
|
#include <openssl/err.h>
|
|
int main(int argc, char **argv)
|
{
|
BIO *in = NULL, *out = NULL, *tbio = NULL;
|
X509 *scert = NULL, *scert2 = NULL;
|
EVP_PKEY *skey = NULL, *skey2 = NULL;
|
PKCS7 *p7 = NULL;
|
int ret = 1;
|
|
OpenSSL_add_all_algorithms();
|
ERR_load_crypto_strings();
|
|
tbio = BIO_new_file("signer.pem", "r");
|
|
if (!tbio)
|
goto err;
|
|
scert = PEM_read_bio_X509(tbio, NULL, 0, NULL);
|
|
BIO_reset(tbio);
|
|
skey = PEM_read_bio_PrivateKey(tbio, NULL, 0, NULL);
|
|
BIO_free(tbio);
|
|
tbio = BIO_new_file("signer2.pem", "r");
|
|
if (!tbio)
|
goto err;
|
|
scert2 = PEM_read_bio_X509(tbio, NULL, 0, NULL);
|
|
BIO_reset(tbio);
|
|
skey2 = PEM_read_bio_PrivateKey(tbio, NULL, 0, NULL);
|
|
if (!scert2 || !skey2)
|
goto err;
|
|
in = BIO_new_file("sign.txt", "r");
|
|
if (!in)
|
goto err;
|
|
p7 = PKCS7_sign(NULL, NULL, NULL, in, PKCS7_STREAM | PKCS7_PARTIAL);
|
|
if (!p7)
|
goto err;
|
|
/* Add each signer in turn */
|
|
if (!PKCS7_sign_add_signer(p7, scert, skey, NULL, 0))
|
goto err;
|
|
if (!PKCS7_sign_add_signer(p7, scert2, skey2, NULL, 0))
|
goto err;
|
|
out = BIO_new_file("smout.txt", "w");
|
if (!out)
|
goto err;
|
|
/* NB: content included and finalized by SMIME_write_PKCS7 */
|
|
if (!SMIME_write_PKCS7(out, p7, in, PKCS7_STREAM))
|
goto err;
|
|
ret = 0;
|
|
err:
|
if (ret) {
|
fprintf(stderr, "Error Signing Data\n");
|
ERR_print_errors_fp(stderr);
|
}
|
PKCS7_free(p7);
|
X509_free(scert);
|
EVP_PKEY_free(skey);
|
X509_free(scert2);
|
EVP_PKEY_free(skey2);
|
BIO_free(in);
|
BIO_free(out);
|
BIO_free(tbio);
|
return ret;
|
}
|
