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- /*
- * 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
- */
- /* Simple S/MIME decryption 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;
- 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;
- rcert = PEM_read_bio_X509(tbio, NULL, 0, NULL);
- BIO_reset(tbio);
- rkey = PEM_read_bio_PrivateKey(tbio, NULL, 0, NULL);
- if (!rcert || !rkey)
- goto err;
- /* Open S/MIME message to decrypt */
- in = BIO_new_file("smencr.txt", "r");
- if (!in)
- goto err;
- /* Parse message */
- cms = SMIME_read_CMS(in, NULL);
- if (!cms)
- goto err;
- out = BIO_new_file("decout.txt", "w");
- if (!out)
- goto err;
- /* Decrypt S/MIME message */
- if (!CMS_decrypt(cms, rkey, rcert, NULL, out, 0))
- goto err;
- ret = 0;
- err:
- 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);
- return ret;
- }
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