/* t-decrypt-verify.c  - regression test
 *	Copyright (C) 2000 Werner Koch (dd9jn)
 *      Copyright (C) 2001 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 this program; 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 <errno.h>

#include <gpgme.h>

struct passphrase_cb_info_s
{
  GpgmeCtx c;
  int did_it;
};


#define fail_if_err(a) do { if(a) { int my_errno = errno;	\
            fprintf (stderr, "%s:%d: GpgmeError %s\n",		\
                 __FILE__, __LINE__, gpgme_strerror(a));	\
            if ((a) == GPGME_File_Error)			\
                   fprintf (stderr, "\terrno=`%s'\n", strerror (my_errno)); \
                   exit (1); }					\
                             } while(0)

static void
print_data (GpgmeData dh)
{
  char buf[100];
  size_t nread;
  GpgmeError err;

  err = gpgme_data_rewind (dh);
  fail_if_err (err);
  while (!(err = gpgme_data_read (dh, buf, 100, &nread)))
    fwrite ( buf, nread, 1, stdout );
  if (err != GPGME_EOF) 
    fail_if_err (err);
}

static const char *
passphrase_cb (void *opaque, const char *desc, void **r_hd)
{
  const char *pass;

  if ( !desc )
    {
      /* Cleanup by looking at *r_hd.  */
      return NULL;
    }

  pass = "abc";
  fprintf (stderr, "%% requesting passphrase for `%s': ", desc);
  fprintf (stderr, "sending `%s'\n", pass);

  return pass;
}

static char *
mk_fname (const char *fname)
{
  const char *srcdir = getenv ("srcdir");
  char *buf;

  if (!srcdir)
    srcdir = ".";
  buf = malloc (strlen(srcdir) + strlen(fname) + 2);
  if (!buf)
    exit (8);
  strcpy (buf, srcdir);
  strcat (buf, "/");
  strcat (buf, fname);
  return buf;
}

int 
main (int argc, char **argv)
{
  GpgmeCtx ctx;
  GpgmeError err;
  GpgmeData in, out, pwdata = NULL;
  struct passphrase_cb_info_s info;
  const char *cipher_2_asc = mk_fname ("cipher-2.asc");
  GpgmeSigStat stat;
  char *p;

  do
    {
      err = gpgme_new (&ctx);
      fail_if_err (err);

      p = getenv("GPG_AGENT_INFO");
      if (!(p && strchr (p, ':')))
	{
	  memset (&info, 0, sizeof info);
	  info.c = ctx;
	  gpgme_set_passphrase_cb (ctx, passphrase_cb, &info);
	} 

      err = gpgme_data_new_from_file (&in, cipher_2_asc, 1);
      fail_if_err (err);

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

      err = gpgme_op_decrypt_verify (ctx, in, out, &stat);
      fail_if_err (err);
    
      fflush (NULL);
      fputs ("Begin Result:\n", stdout);
      print_data (out);
      fputs ("End Result.\n", stdout);
   
      if (stat != GPGME_SIG_STAT_GOOD)
	{
	  fprintf (stderr, "Signature check failed unexpectedly.\n");
	  exit (1);
	}

      gpgme_data_release (in);
      gpgme_data_release (out);
      gpgme_data_release (pwdata);
      gpgme_release (ctx);
    }
  while (argc > 1 && !strcmp (argv[1], "--loop"));

  return 0;
}