openssl/demos/smime/smenc.c
James Muir 86db958835 demos: tidy up makefiles, fix warnings
Update makefiles so that consistent patterns are used.  Object files
are compiled from source using an implicit rule (but using our
CFLAGS); for linking, we give an explicit rule.  Ensure that "make
test" works in each subdirectory (even if it does not actually run any
applications).  The top-level demo makefile now works.

The makefiles are not make-agnostic.  e.g. they use the variable $(RM)
in "clean" recipes, which is defined in gnu-make but may not be
defined in others.

Part of #17806

Testing:

  $ cd demo
  $ make test

Reviewed-by: Paul Dale <pauli@openssl.org>
Reviewed-by: Tomas Mraz <tomas@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/22698)
2023-11-15 08:43:23 +01:00

91 lines
2.0 KiB
C

/*
* Copyright 2007-2023 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
*/
/* Simple S/MIME encrypt example */
#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 *rcert = NULL;
STACK_OF(X509) *recips = NULL;
PKCS7 *p7 = NULL;
int ret = EXIT_FAILURE;
/*
* for streaming set PKCS7_STREAM
*/
int flags = PKCS7_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;
/*
* OSSL_STACK_OF_X509_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 */
p7 = PKCS7_encrypt(recips, in, EVP_des_ede3_cbc(), flags);
if (!p7)
goto err;
out = BIO_new_file("smencr.txt", "w");
if (!out)
goto err;
/* Write out S/MIME message */
if (!SMIME_write_PKCS7(out, p7, in, flags))
goto err;
printf("Success\n");
ret = EXIT_SUCCESS;
err:
if (ret != EXIT_SUCCESS) {
fprintf(stderr, "Error Encrypting Data\n");
ERR_print_errors_fp(stderr);
}
PKCS7_free(p7);
X509_free(rcert);
OSSL_STACK_OF_X509_free(recips);
BIO_free(in);
BIO_free(out);
BIO_free(tbio);
return ret;
}