mirror of
https://github.com/openssl/openssl.git
synced 2024-12-21 06:09:35 +08:00
96 lines
2.2 KiB
C
96 lines
2.2 KiB
C
/*
|
|
* Copyright 2008-2023 The OpenSSL Project Authors. All Rights Reserved.
|
|
*
|
|
* Licensed under the Apache License 2.0 (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 detached data encrypt example: rarely done but should the need
|
|
* arise this is an example....
|
|
*/
|
|
#include <openssl/pem.h>
|
|
#include <openssl/cms.h>
|
|
#include <openssl/err.h>
|
|
|
|
int main(int argc, char **argv)
|
|
{
|
|
BIO *in = NULL, *out = NULL, *tbio = NULL, *dout = NULL;
|
|
X509 *rcert = NULL;
|
|
STACK_OF(X509) *recips = NULL;
|
|
CMS_ContentInfo *cms = NULL;
|
|
int ret = EXIT_FAILURE;
|
|
|
|
int flags = CMS_STREAM | CMS_DETACHED;
|
|
|
|
OpenSSL_add_all_algorithms();
|
|
ERR_load_crypto_strings();
|
|
|
|
/* Read in recipient certificate */
|
|
tbio = BIO_new_file("signer.pem", "r");
|
|
|
|
if (!tbio)
|
|
goto err;
|
|
|
|
rcert = PEM_read_bio_X509(tbio, NULL, 0, NULL);
|
|
|
|
if (!rcert)
|
|
goto err;
|
|
|
|
/* Create recipient STACK and add recipient cert to it */
|
|
recips = sk_X509_new_null();
|
|
|
|
if (!recips || !sk_X509_push(recips, rcert))
|
|
goto err;
|
|
|
|
/*
|
|
* OSSL_STACK_OF_X509_free() free up recipient STACK and its contents
|
|
* so set rcert to NULL so it isn't freed up twice.
|
|
*/
|
|
rcert = NULL;
|
|
|
|
/* Open content being encrypted */
|
|
|
|
in = BIO_new_file("encr.txt", "r");
|
|
|
|
dout = BIO_new_file("smencr.out", "wb");
|
|
|
|
if (!in)
|
|
goto err;
|
|
|
|
/* encrypt content */
|
|
cms = CMS_encrypt(recips, in, EVP_des_ede3_cbc(), flags);
|
|
|
|
if (!cms)
|
|
goto err;
|
|
|
|
out = BIO_new_file("smencr.pem", "w");
|
|
if (!out)
|
|
goto err;
|
|
|
|
if (!CMS_final(cms, in, dout, flags))
|
|
goto err;
|
|
|
|
/* Write out CMS structure without content */
|
|
if (!PEM_write_bio_CMS(out, cms))
|
|
goto err;
|
|
|
|
ret = EXIT_SUCCESS;
|
|
err:
|
|
if (ret != EXIT_SUCCESS) {
|
|
fprintf(stderr, "Error Encrypting Data\n");
|
|
ERR_print_errors_fp(stderr);
|
|
}
|
|
|
|
CMS_ContentInfo_free(cms);
|
|
X509_free(rcert);
|
|
OSSL_STACK_OF_X509_free(recips);
|
|
BIO_free(in);
|
|
BIO_free(out);
|
|
BIO_free(dout);
|
|
BIO_free(tbio);
|
|
return ret;
|
|
}
|