/* cms-decrypt.c  - Helper to debug the decrupt operation.

   Copyright (C) 2008 g10 Code GmbH

   This file is part of GPGME.

   GPGME is free software; you can redistribute it and/or modify it

   under the terms of the GNU Lesser General Public License as

   published by the Free Software Foundation; either version 2.1 of

   the License, or (at your option) any later version.

   GPGME is distributed in the hope that it will be useful, but

   WITHOUT ANY WARRANTY; without even the implied warranty of

   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public

   License along with this program; if not, see <https://www.gnu.org/licenses/>.

*/

/* We need to include config.h so that we know whether we are building

   with large file system (LFS) support. */

#ifdef HAVE_CONFIG_H

#include <config.h>

#endif

#include <stdlib.h>

#include <stdio.h>

#include <string.h>

#include <gpgme.h>

#define PGM "cms-decrypt"

#include "t-support.h"

static const char *

nonnull (const char *s)

{

  return s? s :"[none]";

}

int 

main (int argc, char **argv)

{

  gpgme_error_t err;

  gpgme_ctx_t ctx;

  gpgme_data_t in, out;

  gpgme_decrypt_result_t result;

  gpgme_recipient_t recp;

  if (argc)

    { argc--; argv++; }

  if (argc != 1)

    {

      fputs ("usage: " PGM " FILE\n", stderr);

      exit (1);

    }

  init_gpgme (GPGME_PROTOCOL_CMS);

  err = gpgme_new (&ctx;;

  fail_if_err (err);

  gpgme_set_protocol (ctx, GPGME_PROTOCOL_CMS);

  err = gpgme_data_new_from_file (&in, *argv, 1);

  fail_if_err (err);

  err = gpgme_data_new (&out;;

  fail_if_err (err);

  err = gpgme_op_decrypt (ctx, in, out);

  printf ("gpgme_op_decrypt: %s <%s> (%u)\n",

          gpgme_strerror (err), gpgme_strsource (err), err);

  result = gpgme_op_decrypt_result (ctx);

  if (!result)

    {

      fputs (PGM ": error: decryption result missing\n", stderr);

      exit (1);

    }

  printf ("unsupported_algorithm: %s\n", 

          nonnull (result->unsupported_algorithm));

  printf ("wrong_key_usage: %u\n",  result->wrong_key_usage);

  printf ("file_name: %s\n", nonnull (result->file_name));

  for (recp = result->recipients; recp; recp = recp->next)

    {

      printf ("recipient.status: %s <%s> (%u)\n",

              gpgme_strerror (recp->status), gpgme_strsource (recp->status),

              recp->status);

      printf ("recipient.pkalgo: %d\n", recp->pubkey_algo);

      printf ("recipient.keyid : %s\n", nonnull (recp->keyid));

    }

  if (!err)

    {

      puts ("plaintext:");

      print_data (out);

      gpgme_data_release (out);

    }

  gpgme_data_release (in);

  gpgme_release (ctx);

  return 0;

}