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/* decrypt-verify.c - Decrypt and verify function.
   Copyright (C) 2000 Werner Koch (dd9jn)
   Copyright (C) 2001, 2002, 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.  */

#if HAVE_CONFIG_H
#include <config.h>
#endif

#include "gpgme.h"
#include "ops.h"


static GpgmeError
decrypt_verify_status_handler (void *priv, GpgmeStatusCode code, char *args)
{
  return _gpgme_decrypt_status_handler (priv, code, args)
    || _gpgme_verify_status_handler (priv, code, args);
}


static GpgmeError
_gpgme_op_decrypt_verify_start (GpgmeCtx ctx, int synchronous,
				GpgmeData cipher, GpgmeData plain)
{
  GpgmeError err;

  err = _gpgme_op_reset (ctx, synchronous);
  if (err)
    return err;

  err = _gpgme_op_decrypt_init_result (ctx);
  if (err)
    return err;

  err = _gpgme_op_verify_init_result (ctx);
  if (err)
    return err;

  if (!cipher)
    return GPGME_No_Data;
  if (!plain)
    return GPGME_Invalid_Value;

  if (ctx->passphrase_cb)
    {
      err = _gpgme_engine_set_command_handler (ctx->engine,
					       _gpgme_passphrase_command_handler,
					       ctx, NULL);
      if (err)
	return err;
    }

  _gpgme_engine_set_status_handler (ctx->engine,
				    decrypt_verify_status_handler, ctx);
  
  return _gpgme_engine_op_decrypt (ctx->engine, cipher, plain);
}


/* Decrypt ciphertext CIPHER and make a signature verification within
   CTX and store the resulting plaintext in PLAIN.  */
GpgmeError
gpgme_op_decrypt_verify_start (GpgmeCtx ctx, GpgmeData cipher, GpgmeData plain)
{
  return _gpgme_op_decrypt_verify_start (ctx, 0, cipher, plain);
}


/* Decrypt ciphertext CIPHER and make a signature verification within
   CTX and store the resulting plaintext in PLAIN.  */
GpgmeError
gpgme_op_decrypt_verify (GpgmeCtx ctx, GpgmeData cipher, GpgmeData plain)
{
  GpgmeError err = _gpgme_op_decrypt_verify_start (ctx, 1, cipher, plain);
  if (!err)
    err = _gpgme_wait_one (ctx);
  return err;
}