kex.h revision 76259
1201472Sdavidxu/* $OpenBSD: kex.h,v 1.22 2001/04/04 20:25:37 markus Exp $ */ 2201472Sdavidxu 3201472Sdavidxu/* 4201472Sdavidxu * Copyright (c) 2000 Markus Friedl. All rights reserved. 5201472Sdavidxu * 6201472Sdavidxu * Redistribution and use in source and binary forms, with or without 7201472Sdavidxu * modification, are permitted provided that the following conditions 8201472Sdavidxu * are met: 9201472Sdavidxu * 1. Redistributions of source code must retain the above copyright 10201472Sdavidxu * notice, this list of conditions and the following disclaimer. 11201472Sdavidxu * 2. Redistributions in binary form must reproduce the above copyright 12201472Sdavidxu * notice, this list of conditions and the following disclaimer in the 13201472Sdavidxu * documentation and/or other materials provided with the distribution. 14201472Sdavidxu * 15201472Sdavidxu * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16201472Sdavidxu * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17201472Sdavidxu * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18201472Sdavidxu * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19201472Sdavidxu * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20201472Sdavidxu * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21201472Sdavidxu * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22201472Sdavidxu * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23201472Sdavidxu * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24201472Sdavidxu * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25201472Sdavidxu */ 26201472Sdavidxu#ifndef KEX_H 27201472Sdavidxu#define KEX_H 28201472Sdavidxu 29201472Sdavidxu#include <openssl/evp.h> 30201472Sdavidxu#include "buffer.h" 31201472Sdavidxu#include "cipher.h" 32201472Sdavidxu#include "key.h" 33201472Sdavidxu 34232144Sdavidxu#define KEX_DH1 "diffie-hellman-group1-sha1" 35201472Sdavidxu#define KEX_DHGEX "diffie-hellman-group-exchange-sha1" 36201472Sdavidxu 37201472Sdavidxuenum kex_init_proposals { 38201472Sdavidxu PROPOSAL_KEX_ALGS, 39201472Sdavidxu PROPOSAL_SERVER_HOST_KEY_ALGS, 40201472Sdavidxu PROPOSAL_ENC_ALGS_CTOS, 41201472Sdavidxu PROPOSAL_ENC_ALGS_STOC, 42201472Sdavidxu PROPOSAL_MAC_ALGS_CTOS, 43201472Sdavidxu PROPOSAL_MAC_ALGS_STOC, 44201472Sdavidxu PROPOSAL_COMP_ALGS_CTOS, 45201472Sdavidxu PROPOSAL_COMP_ALGS_STOC, 46201472Sdavidxu PROPOSAL_LANG_CTOS, 47201472Sdavidxu PROPOSAL_LANG_STOC, 48201472Sdavidxu PROPOSAL_MAX 49201472Sdavidxu}; 50216641Sdavidxu 51216641Sdavidxuenum kex_modes { 52201472Sdavidxu MODE_IN, 53201472Sdavidxu MODE_OUT, 54201472Sdavidxu MODE_MAX 55201472Sdavidxu}; 56201472Sdavidxu 57201472Sdavidxuenum kex_exchange { 58201472Sdavidxu DH_GRP1_SHA1, 59201472Sdavidxu DH_GEX_SHA1 60201472Sdavidxu}; 61201472Sdavidxu 62201472Sdavidxu#define KEX_INIT_SENT 0x0001 63201472Sdavidxu 64201472Sdavidxutypedef struct Kex Kex; 65201472Sdavidxutypedef struct Mac Mac; 66201472Sdavidxutypedef struct Comp Comp; 67201472Sdavidxutypedef struct Enc Enc; 68232144Sdavidxutypedef struct Newkeys Newkeys; 69232144Sdavidxu 70232144Sdavidxustruct Enc { 71232144Sdavidxu char *name; 72232144Sdavidxu Cipher *cipher; 73232144Sdavidxu int enabled; 74201472Sdavidxu u_char *key; 75 u_char *iv; 76}; 77struct Mac { 78 char *name; 79 int enabled; 80 EVP_MD *md; 81 int mac_len; 82 u_char *key; 83 int key_len; 84}; 85struct Comp { 86 int type; 87 int enabled; 88 char *name; 89}; 90struct Newkeys { 91 Enc enc; 92 Mac mac; 93 Comp comp; 94}; 95struct Kex { 96 u_char *session_id; 97 int session_id_len; 98 Newkeys *newkeys[MODE_MAX]; 99 int we_need; 100 int server; 101 char *name; 102 int hostkey_type; 103 int kex_type; 104 Buffer my; 105 Buffer peer; 106 int done; 107 int flags; 108 char *client_version_string; 109 char *server_version_string; 110 int (*check_host_key)(Key *hostkey); 111 Key *(*load_host_key)(int type); 112}; 113 114Kex *kex_setup(char *proposal[PROPOSAL_MAX]); 115void kex_finish(Kex *kex); 116 117void kex_send_kexinit(Kex *kex); 118void kex_input_kexinit(int type, int plen, void *ctxt); 119void kex_derive_keys(Kex *k, u_char *hash, BIGNUM *shared_secret); 120 121void kexdh(Kex *); 122void kexgex(Kex *); 123 124Newkeys *kex_get_newkeys(int mode); 125 126#if defined(DEBUG_KEX) || defined(DEBUG_KEXDH) 127void dump_digest(char *msg, u_char *digest, int len); 128#endif 129 130#endif 131