release/src/router/dropbear/kex.h

   1 /*
   2  * Dropbear - a SSH2 server
   3  *
   4  * Copyright (c) 2002,2003 Matt Johnston
   5  * All rights reserved.
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a copy
   8  * of this software and associated documentation files (the "Software"), to deal
   9  * in the Software without restriction, including without limitation the rights
  10  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  11  * copies of the Software, and to permit persons to whom the Software is
  12  * furnished to do so, subject to the following conditions:
  13  *
  14  * The above copyright notice and this permission notice shall be included in
  15  * all copies or substantial portions of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  18  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  20  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  21  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  22  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  23  * SOFTWARE. */
  24
  25 #ifndef _KEX_H_
  26 #define _KEX_H_
  27
  28 #include "includes.h"
  29 #include "algo.h"
  30
  31 void send_msg_kexinit();
  32 void recv_msg_kexinit();
  33 void send_msg_newkeys();
  34 void recv_msg_newkeys();
  35 void kexfirstinitialise();
  36 void gen_kexdh_vals(mp_int *dh_pub, mp_int *dh_priv);
  37 void kexdh_comb_key(mp_int *dh_pub_us, mp_int *dh_priv, mp_int *dh_pub_them,
  38                 sign_key *hostkey);
  39
  40 #ifndef DISABLE_ZLIB
  41 int is_compress_trans();
  42 int is_compress_recv();
  43 #endif
  44
  45 void recv_msg_kexdh_init(); /* server */
  46
  47 void send_msg_kexdh_init(); /* client */
  48 void recv_msg_kexdh_reply(); /* client */
  49
  50 struct KEXState {
  51
  52         unsigned sentkexinit : 1; /*set when we've sent/recv kexinit packet */
  53         unsigned recvkexinit : 1;
  54         unsigned firstfollows : 1; /* true when first_kex_packet_follows is set */
  55         unsigned sentnewkeys : 1; /* set once we've send MSG_NEWKEYS (will be cleared once we have also received */
  56         unsigned recvnewkeys : 1; /* set once we've received MSG_NEWKEYS (cleared once we have also sent */
  57
  58         unsigned donefirstkex : 1; /* Set to 1 after the first kex has completed,
  59                                                                   ie the transport layer has been set up */
  60
  61         time_t lastkextime; /* time of the last kex */
  62         unsigned int datatrans; /* data transmitted since last kex */
  63         unsigned int datarecv; /* data received since last kex */
  64
  65 };
  66
  67 #define MAX_KEXHASHBUF 2000
  68
  69 #endif /* _KEX_H_ */