Home | History | Annotate | Line # | Download | only in smime 
      1 /*
      2  * Copyright 2007-2016 The OpenSSL Project Authors. All Rights Reserved.
      3  *
      4  * Licensed under the Apache License 2.0 (the "License").  You may not use
      5  * this file except in compliance with the License.  You can obtain a copy
      6  * in the file LICENSE in the source distribution or at
      7  * https://www.openssl.org/source/license.html
      8  */
      9 
     10 /* Simple S/MIME signing example */
     11 #include <openssl/pem.h>
     12 #include <openssl/pkcs7.h>
     13 #include <openssl/err.h>
     14 
     15 int main(int argc, char **argv)
     16 {
     17     BIO *in = NULL, *out = NULL, *tbio = NULL;
     18     X509 *rcert = NULL;
     19     EVP_PKEY *rkey = NULL;
     20     PKCS7 *p7 = NULL;
     21     int ret = 1;
     22 
     23     OpenSSL_add_all_algorithms();
     24     ERR_load_crypto_strings();
     25 
     26     /* Read in recipient certificate and private key */
     27     tbio = BIO_new_file("signer.pem", "r");
     28 
     29     if (!tbio)
     30         goto err;
     31 
     32     rcert = PEM_read_bio_X509(tbio, NULL, 0, NULL);
     33 
     34     BIO_reset(tbio);
     35 
     36     rkey = PEM_read_bio_PrivateKey(tbio, NULL, 0, NULL);
     37 
     38     if (!rcert || !rkey)
     39         goto err;
     40 
     41     /* Open content being signed */
     42 
     43     in = BIO_new_file("smencr.txt", "r");
     44 
     45     if (!in)
     46         goto err;
     47 
     48     /* Sign content */
     49     p7 = SMIME_read_PKCS7(in, NULL);
     50 
     51     if (!p7)
     52         goto err;
     53 
     54     out = BIO_new_file("encrout.txt", "w");
     55     if (!out)
     56         goto err;
     57 
     58     /* Decrypt S/MIME message */
     59     if (!PKCS7_decrypt(p7, rkey, rcert, out, 0))
     60         goto err;
     61 
     62     ret = 0;
     63 
     64  err:
     65     if (ret) {
     66         fprintf(stderr, "Error Signing Data\n");
     67         ERR_print_errors_fp(stderr);
     68     }
     69     PKCS7_free(p7);
     70     X509_free(rcert);
     71     EVP_PKEY_free(rkey);
     72     BIO_free(in);
     73     BIO_free(out);
     74     BIO_free(tbio);
     75 
     76     return ret;
     77 
     78 }
     79