/*
 * Copyright (C) 2005-2011 Free Software Foundation, Inc.
 *
 * Author: Nikos Mavrogiannopoulos
 *
 * This file is part of GnuTLS.
 *
 * The GnuTLS 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 3 of
 * the License, or (at your option) any later version.
 *
 * This library 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 <http://www.gnu.org/licenses/>
 *
 */

#ifndef AUTH_PSK_H
#define AUTH_PSK_H

#include <gnutls_auth.h>
#include <auth/dh_common.h>

typedef struct gnutls_psk_client_credentials_st
{
  gnutls_datum_t username;
  gnutls_datum_t key;
  gnutls_psk_client_credentials_function *get_function;
} psk_client_credentials_st;

typedef struct gnutls_psk_server_credentials_st
{
  char *password_file;
  /* callback function, instead of reading the
   * password files.
   */
  gnutls_psk_server_credentials_function *pwd_callback;

  /* For DHE_PSK */
  gnutls_dh_params_t dh_params;
  /* this callback is used to retrieve the DH or RSA
   * parameters.
   */
  gnutls_params_function *params_func;

  /* Identity hint. */
  char *hint;
} psk_server_cred_st;

/* these structures should not use allocated data */
typedef struct psk_auth_info_st
{
  char username[MAX_USERNAME_SIZE + 1];
  dh_info_st dh;
  char hint[MAX_USERNAME_SIZE + 1];
} *psk_auth_info_t;


#ifdef ENABLE_PSK

typedef struct psk_auth_info_st psk_auth_info_st;

int
_gnutls_set_psk_session_key (gnutls_session_t session, gnutls_datum_t* key, gnutls_datum_t * psk2);

int _gnutls_find_psk_key( gnutls_session_t session, gnutls_psk_client_credentials_t cred, 
  gnutls_datum_t * username, gnutls_datum_t* key, int* free);

#else
#define _gnutls_set_psk_session_key(x,y) GNUTLS_E_INTERNAL_ERROR
#endif /* ENABLE_PSK */

#endif