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 void recv_msg_kexdh_init(); /* server */ 41 42 void send_msg_kexdh_init(); /* client */ 43 void recv_msg_kexdh_reply(); /* client */ 44 45 struct KEXState { 46 47 unsigned sentkexinit : 1; /*set when we've sent/recv kexinit packet */ 48 unsigned recvkexinit : 1; 49 unsigned firstfollows : 1; /* true when first_kex_packet_follows is set */ 50 unsigned sentnewkeys : 1; /* set once we've send/recv'ed MSG_NEWKEYS*/ 51 unsigned recvnewkeys : 1; 52 53 unsigned donefirstkex : 1; /* Set to 1 after the first kex has completed, 54 ie the transport layer has been set up */ 55 56 long lastkextime; /* time of the last kex */ 57 unsigned int datatrans; /* data transmitted since last kex */ 58 unsigned int datarecv; /* data received since last kex */ 59 60 }; 61 62 #define MAX_KEXHASHBUF 2000 63 64 #endif /* _KEX_H_ */ 65