/* run-identify  - Helper to run the identify command

 * Copyright (C) 2016 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 "run-identify"

#include "run-support.h"

static int verbose;

static const char *

data_type_to_string (gpgme_data_type_t dt)

{

  const char *s = "[?]";

  switch (dt)

    {

    case GPGME_DATA_TYPE_INVALID      : s = "invalid"; break;

    case GPGME_DATA_TYPE_UNKNOWN      : s = "unknown"; break;

    case GPGME_DATA_TYPE_PGP_SIGNED   : s = "PGP-signed"; break;

    case GPGME_DATA_TYPE_PGP_SIGNATURE: s = "PGP-signature"; break;

    case GPGME_DATA_TYPE_PGP_ENCRYPTED: s = "PGP-encrypted"; break;

    case GPGME_DATA_TYPE_PGP_OTHER    : s = "PGP"; break;

    case GPGME_DATA_TYPE_PGP_KEY      : s = "PGP-key"; break;

    case GPGME_DATA_TYPE_CMS_SIGNED   : s = "CMS-signed"; break;

    case GPGME_DATA_TYPE_CMS_ENCRYPTED: s = "CMS-encrypted"; break;

    case GPGME_DATA_TYPE_CMS_OTHER    : s = "CMS"; break;

    case GPGME_DATA_TYPE_X509_CERT    : s = "X.509"; break;

    case GPGME_DATA_TYPE_PKCS12       : s = "PKCS12"; break;

    }

  return s;

}

static int

show_usage (int ex)

{

  fputs ("usage: " PGM " [options] FILENAMEs\n\n"

         "Options:\n"

         "  --verbose        run in verbose mode\n"

         , stderr);

  exit (ex);

}

int

main (int argc, char **argv)

{

  int last_argc = -1;

  gpgme_error_t err;

  int anyerr = 0;

  gpgme_data_t data;

  gpgme_data_type_t dt;

  if (argc)

    { argc--; argv++; }

  while (argc && last_argc != argc )

    {

      last_argc = argc;

      if (!strcmp (*argv, "--"))

        {

          argc--; argv++;

          break;

        }

      else if (!strcmp (*argv, "--help"))

        show_usage (0);

      else if (!strcmp (*argv, "--verbose"))

        {

          verbose = 1;

          argc--; argv++;

        }

      else if (!strncmp (*argv, "--", 2))

        show_usage (1);

    }

  init_gpgme_basic ();

  for (; argc; argc--, argv++)

    {

      if (verbose)

        printf ("reading file `%s'\n", *argv);

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

      if (err)

        {

          fprintf (stderr, PGM ": error reading '%s': %s\n",

                   *argv, gpg_strerror (err));

          anyerr = 1;

        }

      else

        {

          dt = gpgme_data_identify (data, 0);

          if (dt == GPGME_DATA_TYPE_INVALID)

            anyerr = 1;

          printf ("%s: %s\n", *argv, data_type_to_string (dt));

          gpgme_data_release (data);

        }

    }

  return anyerr;

}