crypto/external/bsd/openssl/dist/demos/cms/cms_dec.c

   1 /* Simple S/MIME decryption example */
   2 #include <openssl/pem.h>
   3 #include <openssl/cms.h>
   4 #include <openssl/err.h>
   5
   6 int main(int argc, char **argv)
   7         {
   8         BIO *in = NULL, *out = NULL, *tbio = NULL;
   9         X509 *rcert = NULL;
  10         EVP_PKEY *rkey = NULL;
  11         CMS_ContentInfo *cms = NULL;
  12         int ret = 1;
  13
  14         OpenSSL_add_all_algorithms();
  15         ERR_load_crypto_strings();
  16
  17         /* Read in recipient certificate and private key */
  18         tbio = BIO_new_file("signer.pem", "r");
  19
  20         if (!tbio)
  21                 goto err;
  22
  23         rcert = PEM_read_bio_X509(tbio, NULL, 0, NULL);
  24
  25         BIO_reset(tbio);
  26
  27         rkey = PEM_read_bio_PrivateKey(tbio, NULL, 0, NULL);
  28
  29         if (!rcert || !rkey)
  30                 goto err;
  31
  32         /* Open S/MIME message to decrypt */
  33
  34         in = BIO_new_file("smencr.txt", "r");
  35
  36         if (!in)
  37                 goto err;
  38
  39         /* Parse message */
  40         cms = SMIME_read_CMS(in, NULL);
  41
  42         if (!cms)
  43                 goto err;
  44
  45         out = BIO_new_file("decout.txt", "w");
  46         if (!out)
  47                 goto err;
  48
  49         /* Decrypt S/MIME message */
  50         if (!CMS_decrypt(cms, rkey, rcert, out, NULL, 0))
  51                 goto err;
  52
  53         ret = 0;
  54
  55         err:
  56
  57         if (ret)
  58                 {
  59                 fprintf(stderr, "Error Decrypting Data\n");
  60                 ERR_print_errors_fp(stderr);
  61                 }
  62
  63         if (cms)
  64                 CMS_ContentInfo_free(cms);
  65         if (rcert)
  66                 X509_free(rcert);
  67         if (rkey)
  68                 EVP_PKEY_free(rkey);
  69
  70         if (in)
  71                 BIO_free(in);
  72         if (out)
  73                 BIO_free(out);
  74         if (tbio)
  75                 BIO_free(tbio);
  76
  77         return ret;
  78
  79         }