-/* S/MIME detached data decrypt example: rarely done but
- * should the need arise this is an example....
+/*
+ * Copyright 2008-2016 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 detached data decrypt 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, *dcont = NULL;
- X509 *rcert = NULL;
- EVP_PKEY *rkey = NULL;
- CMS_ContentInfo *cms = NULL;
- int ret = 1;
-
- OpenSSL_add_all_algorithms();
- ERR_load_crypto_strings();
-
- /* Read in recipient certificate and private key */
- tbio = BIO_new_file("signer.pem", "r");
-
- if (!tbio)
- goto err;
+{
+ BIO *in = NULL, *out = NULL, *tbio = NULL, *dcont = NULL;
+ X509 *rcert = NULL;
+ EVP_PKEY *rkey = NULL;
+ CMS_ContentInfo *cms = NULL;
+ int ret = 1;
- rcert = PEM_read_bio_X509(tbio, NULL, 0, NULL);
+ OpenSSL_add_all_algorithms();
+ ERR_load_crypto_strings();
- BIO_reset(tbio);
+ /* Read in recipient certificate and private key */
+ tbio = BIO_new_file("signer.pem", "r");
- rkey = PEM_read_bio_PrivateKey(tbio, NULL, 0, NULL);
+ if (!tbio)
+ goto err;
- if (!rcert || !rkey)
- goto err;
+ rcert = PEM_read_bio_X509(tbio, NULL, 0, NULL);
- /* Open PEM file containing enveloped data */
+ BIO_reset(tbio);
- in = BIO_new_file("smencr.pem", "r");
+ rkey = PEM_read_bio_PrivateKey(tbio, NULL, 0, NULL);
- if (!in)
- goto err;
+ if (!rcert || !rkey)
+ goto err;
- /* Parse PEM content */
- cms = PEM_read_bio_CMS(in, NULL, 0, NULL);
+ /* Open PEM file containing enveloped data */
- if (!cms)
- goto err;
+ in = BIO_new_file("smencr.pem", "r");
- /* Open file containing detached content */
- dcont = BIO_new_file("smencr.out", "rb");
+ if (!in)
+ goto err;
- if (!in)
- goto err;
+ /* Parse PEM content */
+ cms = PEM_read_bio_CMS(in, NULL, 0, NULL);
- out = BIO_new_file("encrout.txt", "w");
- if (!out)
- goto err;
+ if (!cms)
+ goto err;
- /* Decrypt S/MIME message */
- if (!CMS_decrypt(cms, rkey, rcert, dcont, out, 0))
- goto err;
+ /* Open file containing detached content */
+ dcont = BIO_new_file("smencr.out", "rb");
- ret = 0;
+ if (!in)
+ goto err;
- err:
+ out = BIO_new_file("encrout.txt", "w");
+ if (!out)
+ goto err;
- if (ret)
- {
- fprintf(stderr, "Error Decrypting Data\n");
- ERR_print_errors_fp(stderr);
- }
+ /* Decrypt S/MIME message */
+ if (!CMS_decrypt(cms, rkey, rcert, dcont, out, 0))
+ goto err;
- if (cms)
- CMS_ContentInfo_free(cms);
- if (rcert)
- X509_free(rcert);
- if (rkey)
- EVP_PKEY_free(rkey);
+ ret = 0;
- if (in)
- BIO_free(in);
- if (out)
- BIO_free(out);
- if (tbio)
- BIO_free(tbio);
- if (dcont)
- BIO_free(dcont);
+ err:
- return ret;
+ if (ret) {
+ fprintf(stderr, "Error Decrypting Data\n");
+ ERR_print_errors_fp(stderr);
+ }
- }
+ CMS_ContentInfo_free(cms);
+ X509_free(rcert);
+ EVP_PKEY_free(rkey);
+ BIO_free(in);
+ BIO_free(out);
+ BIO_free(tbio);
+ BIO_free(dcont);
+ return ret;
+}