lib/auth/psk.h

   1 /*
   2  * Copyright (C) 2005-2012 Free Software Foundation, Inc.
   3  *
   4  * Author: Nikos Mavrogiannopoulos
   5  *
   6  * This file is part of GnuTLS.
   7  *
   8  * The GnuTLS is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Lesser General Public License
  10  * as published by the Free Software Foundation; either version 3 of
  11  * the License, or (at your option) any later version.
  12  *
  13  * This library is distributed in the hope that it will be useful, but
  14  * WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * Lesser General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU Lesser General Public License
  19  * along with this program.  If not, see <http://www.gnu.org/licenses/>
  20  *
  21  */
  22
  23 #ifndef AUTH_PSK_H
  24 #define AUTH_PSK_H
  25
  26 #include <gnutls_auth.h>
  27 #include <auth/dh_common.h>
  28
  29 typedef struct gnutls_psk_client_credentials_st
  30 {
  31   gnutls_datum_t username;
  32   gnutls_datum_t key;
  33   gnutls_psk_client_credentials_function *get_function;
  34 } psk_client_credentials_st;
  35
  36 typedef struct gnutls_psk_server_credentials_st
  37 {
  38   char *password_file;
  39   /* callback function, instead of reading the
  40    * password files.
  41    */
  42   gnutls_psk_server_credentials_function *pwd_callback;
  43
  44   /* For DHE_PSK */
  45   gnutls_dh_params_t dh_params;
  46   /* this callback is used to retrieve the DH or RSA
  47    * parameters.
  48    */
  49   gnutls_params_function *params_func;
  50
  51   /* Identity hint. */
  52   char *hint;
  53 } psk_server_cred_st;
  54
  55 /* these structures should not use allocated data */
  56 typedef struct psk_auth_info_st
  57 {
  58   char username[MAX_USERNAME_SIZE + 1];
  59   dh_info_st dh;
  60   char hint[MAX_USERNAME_SIZE + 1];
  61 } *psk_auth_info_t;
  62
  63
  64 #ifdef ENABLE_PSK
  65
  66 typedef struct psk_auth_info_st psk_auth_info_st;
  67
  68 int
  69 _gnutls_set_psk_session_key (gnutls_session_t session, gnutls_datum_t* key, gnutls_datum_t * psk2);
  70
  71 int _gnutls_find_psk_key( gnutls_session_t session, gnutls_psk_client_credentials_t cred,
  72   gnutls_datum_t * username, gnutls_datum_t* key, int* free);
  73
  74 #else
  75 #define _gnutls_set_psk_session_key(x,y) GNUTLS_E_INTERNAL_ERROR
  76 #endif /* ENABLE_PSK */
  77
  78 #endif