lib/gnutls_handshake.h

   1 /*
   2  * Copyright (C) 2000-2012 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 HANDSHAKE_H
  24 #define HANDSHAKE_H
  25
  26 #include <gnutls_errors.h>
  27
  28 int _gnutls_send_handshake (gnutls_session_t session, mbuffer_st * bufel,
  29                             gnutls_handshake_description_t type);
  30 int _gnutls_recv_hello_request (gnutls_session_t session, void *data,
  31                                 uint32_t data_size);
  32 int _gnutls_send_hello (gnutls_session_t session, int again);
  33 int _gnutls_recv_hello (gnutls_session_t session, uint8_t * data, int datalen);
  34 int _gnutls_recv_handshake (gnutls_session_t session,
  35                         gnutls_handshake_description_t type,
  36                         unsigned int optional, gnutls_buffer_st* buf);
  37 int _gnutls_generate_session_id (uint8_t * session_id, uint8_t * len);
  38 void _gnutls_set_server_random (gnutls_session_t session, uint8_t * rnd);
  39 void _gnutls_set_client_random (gnutls_session_t session, uint8_t * rnd);
  40 int _gnutls_tls_create_random (uint8_t * dst);
  41
  42 int _gnutls_find_pk_algos_in_ciphersuites (uint8_t * data, int datalen);
  43 int _gnutls_server_select_suite (gnutls_session_t session, uint8_t * data,
  44                                  unsigned int datalen);
  45
  46 int _gnutls_negotiate_version (gnutls_session_t session,
  47                                gnutls_protocol_t adv_version);
  48 int _gnutls_user_hello_func (gnutls_session_t session,
  49                              gnutls_protocol_t adv_version);
  50
  51 void _gnutls_handshake_hash_buffers_clear (gnutls_session_t session);
  52
  53 #define STATE session->internals.handshake_state
  54 #define FINAL_STATE session->internals.handshake_final_state
  55 /* This returns true if we have got there
  56  * before (and not finished due to an interrupt).
  57  */
  58 #define AGAIN(target) (STATE==target?1:0)
  59 #define FAGAIN(target) (FINAL_STATE==target?1:0)
  60 #define AGAIN2(state, target) (state==target?1:0)
  61
  62 inline static int handshake_remaining_time(gnutls_session_t session)
  63 {
  64   if (session->internals.handshake_endtime)
  65     {
  66       time_t now = gnutls_time(0);
  67       if (now < session->internals.handshake_endtime)
  68         return (session->internals.handshake_endtime - now) * 1000;
  69       else
  70         return gnutls_assert_val(GNUTLS_E_TIMEDOUT);
  71     }
  72   return 0;
  73 }
  74
  75 #endif