demos/cms/cms_uncomp.c

   1 /* Simple S/MIME uncompression 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;
   9     CMS_ContentInfo *cms = NULL;
  10     int ret = 1;
  11
  12     OpenSSL_add_all_algorithms();
  13     ERR_load_crypto_strings();
  14
  15     /* Open compressed content */
  16
  17     in = BIO_new_file("smcomp.txt", "r");
  18
  19     if (!in)
  20         goto err;
  21
  22     /* Sign content */
  23     cms = SMIME_read_CMS(in, NULL);
  24
  25     if (!cms)
  26         goto err;
  27
  28     out = BIO_new_file("smuncomp.txt", "w");
  29     if (!out)
  30         goto err;
  31
  32     /* Uncompress S/MIME message */
  33     if (!CMS_uncompress(cms, out, NULL, 0))
  34         goto err;
  35
  36     ret = 0;
  37
  38  err:
  39
  40     if (ret) {
  41         fprintf(stderr, "Error Uncompressing Data\n");
  42         ERR_print_errors_fp(stderr);
  43     }
  44
  45     if (cms)
  46         CMS_ContentInfo_free(cms);
  47
  48     if (in)
  49         BIO_free(in);
  50     if (out)
  51         BIO_free(out);
  52
  53     return ret;
  54
  55 }