/* t-sign.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 <stdlib.h>
#include <stdio.h>
#include <string.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)
{
#define BUF_SIZE 512
  char buf[BUF_SIZE + 1];
  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, BUF_SIZE)) > 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 *desc, void **hd, const char **result)
{
  /* Cleanup by looking at *hd.  */
  if (!desc)
    return 0;

  *result = "abc";
  return 0;
}


static void
check_result (gpgme_sign_result_t result, gpgme_sig_mode_t type)
{
  if (result->invalid_signers)
    {
      fprintf (stderr, "Invalid signer found: %s\n",
	       result->invalid_signers->id);
      exit (1);
    }
  if (!result->signatures || result->signatures->next)
    {
      fprintf (stderr, "Unexpected number of signatures created\n");
      exit (1);
    }
  if (result->signatures->type != type)
    {
      fprintf (stderr, "Wrong type of signature created\n");
      exit (1);
    }
  if (result->signatures->pubkey_algo != GPGME_PK_DSA)
    {
      fprintf (stderr, "Wrong pubkey algorithm reported: %i\n",
	       result->signatures->pubkey_algo);
      exit (1);
    }
  if (result->signatures->hash_algo != GPGME_MD_SHA1)
    {
      fprintf (stderr, "Wrong hash algorithm reported: %i\n",
	       result->signatures->hash_algo);
      exit (1);
    }
  if (result->signatures->class != 1)
    {
      fprintf (stderr, "Wrong signature class reported: %lu\n",
	       result->signatures->class);
      exit (1);
    }
  if (strcmp ("A0FF4590BB6122EDEF6E3C542D727CC768697734",
	      result->signatures->fpr))
    {
      fprintf (stderr, "Wrong fingerprint reported: %s\n",
	       result->signatures->fpr);
      exit (1);
    }
}


int 
main (int argc, char **argv)
{
  gpgme_ctx_t ctx;
  gpgme_error_t err;
  gpgme_data_t in, out;
  gpgme_sign_result_t result;
  char *agent_info;

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

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

  gpgme_set_textmode (ctx, 1);
  gpgme_set_armor (ctx, 1);

  err = gpgme_data_new_from_mem (&in, "Hallo Leute\n", 12, 0);
  fail_if_err (err);

  /* First a normal signature.  */
  err = gpgme_data_new (&out);
  fail_if_err (err);
  err = gpgme_op_sign (ctx, in, out, GPGME_SIG_MODE_NORMAL);
  fail_if_err (err);
  result = gpgme_op_sign_result (ctx);
  check_result (result, GPGME_SIG_MODE_NORMAL);
  print_data (out);
  gpgme_data_release (out);
    
  /* Now a detached signature.  */ 
  gpgme_data_seek (in, 0, SEEK_SET);
  err = gpgme_data_new (&out);
  fail_if_err (err);
  err = gpgme_op_sign (ctx, in, out, GPGME_SIG_MODE_DETACH);
  fail_if_err (err);
  result = gpgme_op_sign_result (ctx);
  check_result (result, GPGME_SIG_MODE_DETACH);
  print_data (out);
  gpgme_data_release (out);

  /* And finally a cleartext signature.  */
  gpgme_data_seek (in, 0, SEEK_SET);
  err = gpgme_data_new (&out);
  fail_if_err (err);
  err = gpgme_op_sign (ctx, in, out, GPGME_SIG_MODE_CLEAR);
  fail_if_err (err);
  result = gpgme_op_sign_result (ctx);
  check_result (result, GPGME_SIG_MODE_CLEAR);
  print_data (out);
  gpgme_data_release (out);

  gpgme_data_release (in);
  gpgme_release (ctx);
  return 0;
}