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 2.1 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_recv_handshake(gnutls_session_t session,
  33                            gnutls_handshake_description_t type,
  34                            unsigned int optional, gnutls_buffer_st * buf);
  35 int _gnutls_generate_session_id(uint8_t * session_id, uint8_t * len);
  36 int _gnutls_set_server_random(gnutls_session_t session, uint8_t * rnd);
  37 int _gnutls_set_client_random(gnutls_session_t session, uint8_t * rnd);
  38
  39 int _gnutls_find_pk_algos_in_ciphersuites(uint8_t * data, int datalen);
  40 int _gnutls_server_select_suite(gnutls_session_t session, uint8_t * data,
  41                                 unsigned int datalen);
  42
  43 int _gnutls_negotiate_version(gnutls_session_t session,
  44                               gnutls_protocol_t adv_version);
  45 int _gnutls_user_hello_func(gnutls_session_t session,
  46                             gnutls_protocol_t adv_version);
  47
  48 void _gnutls_handshake_hash_buffers_clear(gnutls_session_t session);
  49
  50 #define STATE session->internals.handshake_state
  51 #define FINAL_STATE session->internals.handshake_final_state
  52 /* This returns true if we have got there
  53  * before (and not finished due to an interrupt).
  54  */
  55 #define AGAIN(target) (STATE==target?1:0)
  56 #define FAGAIN(target) (FINAL_STATE==target?1:0)
  57 #define AGAIN2(state, target) (state==target?1:0)
  58
  59 inline static int handshake_remaining_time(gnutls_session_t session)
  60 {
  61         if (session->internals.handshake_endtime) {
  62                 struct timespec now;
  63                 gettime(&now);
  64
  65                 if (now.tv_sec < session->internals.handshake_endtime)
  66                         return (session->internals.handshake_endtime -
  67                                 now.tv_sec) * 1000;
  68                 else
  69                         return gnutls_assert_val(GNUTLS_E_TIMEDOUT);
  70         }
  71         return 0;
  72 }
  73
  74 #endif