/* t-encrypt-sym.c  - regression test
   Copyright (C) 2000 Werner Koch (dd9jn)
   Copyright (C) 2001, 2003 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 General Public License as published by
   the Free Software Foundation; either version 2 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
   General Public License for more details.
 
   You should have received a copy of the GNU General Public License
   along with GPGME; if not, write to the Free Software Foundation,
   Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <assert.h>
#include <unistd.h>

#include <gpgme.h>

#define fail_if_err(err)					\
  do								\
    {								\
      if (err)							\
        {							\
          fprintf (stderr, "%s:%d: gpgme_error_t %s\n",		\
                   __FILE__, __LINE__, gpgme_strerror (err));   \
          exit (1);						\
        }							\
    }								\
  while (0)


static void
print_data (gpgme_data_t dh)
{
  char buf[100];
  int ret;
  
  ret = gpgme_data_seek (dh, 0, SEEK_SET);
  if (ret)
    fail_if_err (GPGME_File_Error);
  while ((ret = gpgme_data_read (dh, buf, 100)) > 0)
    fwrite (buf, ret, 1, stdout);
  if (ret < 0)
    fail_if_err (GPGME_File_Error);
}


static gpgme_error_t
passphrase_cb (void *opaque, const char *uid_hint, const char *passphrase_info,
	       int last_was_bad, int fd)
{
  write (fd, "abc\n", 4);
  return 0;
}


int 
main (int argc, char **argv)
{
  gpgme_ctx_t ctx;
  gpgme_error_t err;
  gpgme_data_t plain, cipher;
  const char *text = "Hallo Leute\n";
  char *text2;
  char *p;
  size_t len;

  err = gpgme_engine_check_version (GPGME_PROTOCOL_OpenPGP);
  fail_if_err (err);

  err = gpgme_new (&ctx);
  fail_if_err (err);
  gpgme_set_armor (ctx, 1);

  p = getenv("GPG_AGENT_INFO");
  if (!(p && strchr (p, ':')))
    gpgme_set_passphrase_cb (ctx, passphrase_cb, NULL);

  err = gpgme_data_new_from_mem (&plain, text, strlen (text), 0);
  fail_if_err (err);

  err = gpgme_data_new (&cipher);
  fail_if_err (err);

  err = gpgme_op_encrypt (ctx, 0, 0, plain, cipher);
  fail_if_err (err);

  fflush (NULL);
  fputs ("Begin Result Encryption:\n", stdout);
  print_data (cipher);
  fputs ("End Result.\n", stdout);

  gpgme_data_seek (cipher, 0, SEEK_SET);

  gpgme_data_release (plain);
  err = gpgme_data_new (&plain);
  fail_if_err (err);

  err = gpgme_op_decrypt (ctx, cipher, plain);
  fail_if_err (err);

  fputs ("Begin Result Decryption:\n", stdout);
  print_data (plain);
  fputs ("End Result.\n", stdout);

  text2 = gpgme_data_release_and_get_mem (plain, &len);
  if (strncmp (text, text2, len))
    {
      fprintf (stderr, "%s:%d: Wrong plaintext\n", __FILE__, __LINE__);
      exit (1);
    }

  gpgme_data_release (cipher);
  gpgme_release (ctx);

  return 0;
}