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Commit	Line	Data
	1	/* $OpenBSD: kex.h,v 1.33 2003/02/16 17:09:57 markus Exp $ */
	2
	3	/*
	4	* Copyright (c) 2000, 2001 Markus Friedl. All rights reserved.
	5	*
	6	* Redistribution and use in source and binary forms, with or without
	7	* modification, are permitted provided that the following conditions
	8	* are met:
	9	* 1. Redistributions of source code must retain the above copyright
	10	* notice, this list of conditions and the following disclaimer.
	11	* 2. Redistributions in binary form must reproduce the above copyright
	12	* notice, this list of conditions and the following disclaimer in the
	13	* documentation and/or other materials provided with the distribution.
	14	*
	15	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
	16	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
	17	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
	18	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
	19	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
	20	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
	21	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
	22	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
	23	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
	24	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
	25	*/
	26	#ifndef KEX_H
	27	#define KEX_H
	28
	29	#include <openssl/evp.h>
	30	#include "buffer.h"
	31	#include "cipher.h"
	32	#include "key.h"
	33
	34	#define KEX_DH1 "diffie-hellman-group1-sha1"
	35	#define KEX_DHGEX "diffie-hellman-group-exchange-sha1"
	36
	37	enum kex_init_proposals {
	38	PROPOSAL_KEX_ALGS,
	39	PROPOSAL_SERVER_HOST_KEY_ALGS,
	40	PROPOSAL_ENC_ALGS_CTOS,
	41	PROPOSAL_ENC_ALGS_STOC,
	42	PROPOSAL_MAC_ALGS_CTOS,
	43	PROPOSAL_MAC_ALGS_STOC,
	44	PROPOSAL_COMP_ALGS_CTOS,
	45	PROPOSAL_COMP_ALGS_STOC,
	46	PROPOSAL_LANG_CTOS,
	47	PROPOSAL_LANG_STOC,
	48	PROPOSAL_MAX
	49	};
	50
	51	enum kex_modes {
	52	MODE_IN,
	53	MODE_OUT,
	54	MODE_MAX
	55	};
	56
	57	enum kex_exchange {
	58	KEX_DH_GRP1_SHA1,
	59	KEX_DH_GEX_SHA1,
	60	KEX_MAX
	61	};
	62
	63	#define KEX_INIT_SENT 0x0001
	64
	65	typedef struct Kex Kex;
	66	typedef struct Mac Mac;
	67	typedef struct Comp Comp;
	68	typedef struct Enc Enc;
	69	typedef struct Newkeys Newkeys;
	70
	71	struct Enc {
	72	char *name;
	73	Cipher *cipher;
	74	int enabled;
	75	u_int key_len;
	76	u_int block_size;
	77	u_char *key;
	78	u_char *iv;
	79	};
	80	struct Mac {
	81	char *name;
	82	int enabled;
	83	const EVP_MD *md;
	84	int mac_len;
	85	u_char *key;
	86	int key_len;
	87	};
	88	struct Comp {
	89	int type;
	90	int enabled;
	91	char *name;
	92	};
	93	struct Newkeys {
	94	Enc enc;
	95	Mac mac;
	96	Comp comp;
	97	};
	98	struct Kex {
	99	u_char *session_id;
	100	u_int session_id_len;
	101	Newkeys *newkeys[MODE_MAX];
	102	int we_need;
	103	int server;
	104	char *name;
	105	int hostkey_type;
	106	int kex_type;
	107	Buffer my;
	108	Buffer peer;
	109	int done;
	110	int flags;
	111	char *client_version_string;
	112	char *server_version_string;
	113	int (verify_host_key)(Key );
	114	Key (load_host_key)(int);
	115	int (host_key_index)(Key );
	116	void (kex[KEX_MAX])(Kex );
	117	};
	118
	119	Kex kex_setup(char [PROPOSAL_MAX]);
	120	void kex_finish(Kex *);
	121
	122	void kex_send_kexinit(Kex *);
	123	void kex_input_kexinit(int, u_int32_t, void *);
	124	void kex_derive_keys(Kex , u_char , BIGNUM *);
	125
	126	Newkeys *kex_get_newkeys(int);
	127
	128	void kexdh_client(Kex *);
	129	void kexdh_server(Kex *);
	130	void kexgex_client(Kex *);
	131	void kexgex_server(Kex *);
	132
	133	u_char *
	134	kex_dh_hash(char , char , char , int, char , int, u_char *, int,
	135	BIGNUM , BIGNUM , BIGNUM *);
	136	u_char *
	137	kexgex_hash(char , char , char , int, char , int, u_char *, int,
	138	int, int, int, BIGNUM , BIGNUM , BIGNUM , BIGNUM , BIGNUM *);
	139
	140	#if defined(DEBUG_KEX) \|\| defined(DEBUG_KEXDH)
	141	void dump_digest(char , u_char , int);
	142	#endif
	143
	144	#endif