You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
93 lines
1.6 KiB
93 lines
1.6 KiB
14 years ago
|
/* Simple S/MIME encrypt 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;
|
||
|
|
X509 *rcert = NULL;
|
||
|
|
STACK_OF(X509) *recips = NULL;
|
||
|
|
CMS_ContentInfo *cms = NULL;
|
||
|
|
int ret = 1;
|
||
|
|
|
||
|
|
/*
|
||
|
|
* On OpenSSL 1.0.0 and later only:
|
||
|
|
* for streaming set CMS_STREAM
|
||
|
|
*/
|
||
|
|
int flags = CMS_STREAM;
|
||
|
|
|
||
|
|
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;
|
||
|
|
|
||
|
|
/* sk_X509_pop_free will 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");
|
||
|
|
|
||
|
|
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.txt", "w");
|
||
|
|
if (!out)
|
||
|
|
goto err;
|
||
|
|
|
||
|
|
/* Write out S/MIME message */
|
||
|
|
if (!SMIME_write_CMS(out, cms, in, flags))
|
||
|
|
goto err;
|
||
|
|
|
||
|
|
ret = 0;
|
||
|
|
|
||
|
|
err:
|
||
|
|
|
||
|
|
if (ret)
|
||
|
|
{
|
||
|
|
fprintf(stderr, "Error Encrypting Data\n");
|
||
|
|
ERR_print_errors_fp(stderr);
|
||
|
|
}
|
||
|
|
|
||
|
|
if (cms)
|
||
|
|
CMS_ContentInfo_free(cms);
|
||
|
|
if (rcert)
|
||
|
|
X509_free(rcert);
|
||
|
|
if (recips)
|
||
|
|
sk_X509_pop_free(recips, X509_free);
|
||
|
|
|
||
|
|
if (in)
|
||
|
|
BIO_free(in);
|
||
|
|
if (out)
|
||
|
|
BIO_free(out);
|
||
|
|
if (tbio)
|
||
|
|
BIO_free(tbio);
|
||
|
|
|
||
|
|
return ret;
|
||
|
|
|
||
|
|
}
|