[openssh.git] / kex.h

/*	$OpenBSD: kex.h,v 1.13 2001/02/04 15:32:24 stevesk Exp $	*/

/*
 * Copyright (c) 2000 Markus Friedl.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
#ifndef KEX_H
#define KEX_H

#define	KEX_DH1		"diffie-hellman-group1-sha1"
#define	KEX_DHGEX	"diffie-hellman-group-exchange-sha1"
#define	KEX_DSS		"ssh-dss"

enum kex_init_proposals {
	PROPOSAL_KEX_ALGS,
	PROPOSAL_SERVER_HOST_KEY_ALGS,
	PROPOSAL_ENC_ALGS_CTOS,
	PROPOSAL_ENC_ALGS_STOC,
	PROPOSAL_MAC_ALGS_CTOS,
	PROPOSAL_MAC_ALGS_STOC,
	PROPOSAL_COMP_ALGS_CTOS,
	PROPOSAL_COMP_ALGS_STOC,
	PROPOSAL_LANG_CTOS,
	PROPOSAL_LANG_STOC,
	PROPOSAL_MAX
};

enum kex_modes {
	MODE_IN,
	MODE_OUT,
	MODE_MAX
};

enum kex_exchange {
	DH_GRP1_SHA1,
	DH_GEX_SHA1
};

typedef struct Kex Kex;
typedef struct Mac Mac;
typedef struct Comp Comp;
typedef struct Enc Enc;

struct Enc {
	char		*name;
	Cipher		*cipher;
	int		enabled;
	u_char	*key;
	u_char	*iv;
};
struct Mac {
	char		*name;
	int		enabled;
	EVP_MD		*md;
	int		mac_len;
	u_char	*key;
	int		key_len;
};
struct Comp {
	int		type;
	int		enabled;
	char		*name;
};
struct Kex {
	Enc		enc [MODE_MAX];
	Mac		mac [MODE_MAX];
	Comp		comp[MODE_MAX];
	int		we_need;
	int		server;
	char		*name;
	int		hostkey_type;
	int		kex_type;
};

Buffer	*kex_init(char *myproposal[PROPOSAL_MAX]);
void
kex_exchange_kexinit(
    Buffer *my_kexinit, Buffer *peer_kexint,
    char *peer_proposal[PROPOSAL_MAX]);
Kex *
kex_choose_conf(char *cprop[PROPOSAL_MAX],
    char *sprop[PROPOSAL_MAX], int server);
int	kex_derive_keys(Kex *k, u_char *hash, BIGNUM *shared_secret);
void	packet_set_kex(Kex *k);
int	dh_pub_is_valid(DH *dh, BIGNUM *dh_pub);
DH	*dh_new_group_asc(const char *, const char *);
DH	*dh_new_group(BIGNUM *, BIGNUM *);
void	dh_gen_key(DH *);
DH	*dh_new_group1(void);

u_char *
kex_hash(
    char *client_version_string,
    char *server_version_string,
    char *ckexinit, int ckexinitlen,
    char *skexinit, int skexinitlen,
    char *serverhostkeyblob, int sbloblen,
    BIGNUM *client_dh_pub,
    BIGNUM *server_dh_pub,
    BIGNUM *shared_secret);

u_char *
kex_hash_gex(
    char *client_version_string,
    char *server_version_string,
    char *ckexinit, int ckexinitlen,
    char *skexinit, int skexinitlen,
    char *serverhostkeyblob, int sbloblen,
    int minbits, BIGNUM *prime, BIGNUM *gen,
    BIGNUM *client_dh_pub,
    BIGNUM *server_dh_pub,
    BIGNUM *shared_secret);
#endif
Commit	Line	Data
b35eb612	1	/* $OpenBSD: kex.h,v 1.13 2001/02/04 15:32:24 stevesk Exp $ */
23c2a7a5	2
7e7327a1	3	/*
	4	* Copyright (c) 2000 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.
7e7327a1	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
94ec8c6b	29	#define KEX_DH1 "diffie-hellman-group1-sha1"
	30	#define KEX_DHGEX "diffie-hellman-group-exchange-sha1"
	31	#define KEX_DSS "ssh-dss"
7e7327a1	32
	33	enum kex_init_proposals {
	34	PROPOSAL_KEX_ALGS,
	35	PROPOSAL_SERVER_HOST_KEY_ALGS,
	36	PROPOSAL_ENC_ALGS_CTOS,
	37	PROPOSAL_ENC_ALGS_STOC,
	38	PROPOSAL_MAC_ALGS_CTOS,
	39	PROPOSAL_MAC_ALGS_STOC,
	40	PROPOSAL_COMP_ALGS_CTOS,
	41	PROPOSAL_COMP_ALGS_STOC,
	42	PROPOSAL_LANG_CTOS,
	43	PROPOSAL_LANG_STOC,
	44	PROPOSAL_MAX
	45	};
	46
	47	enum kex_modes {
	48	MODE_IN,
	49	MODE_OUT,
	50	MODE_MAX
	51	};
	52
94ec8c6b	53	enum kex_exchange {
	54	DH_GRP1_SHA1,
	55	DH_GEX_SHA1
	56	};
2b87da3b	57
7e7327a1	58	typedef struct Kex Kex;
	59	typedef struct Mac Mac;
	60	typedef struct Comp Comp;
	61	typedef struct Enc Enc;
	62
	63	struct Enc {
94ec8c6b	64	char *name;
94ec8c6b	65	Cipher *cipher;
7e7327a1	66	int enabled;
1e3b8b07	67	u_char *key;
1e3b8b07	68	u_char *iv;
7e7327a1	69	};
7e7327a1	70	struct Mac {
94ec8c6b	71	char *name;
7e7327a1	72	int enabled;
94ec8c6b	73	EVP_MD *md;
7e7327a1	74	int mac_len;
1e3b8b07	75	u_char *key;
7e7327a1	76	int key_len;
7e7327a1	77	};
	78	struct Comp {
	79	int type;
	80	int enabled;
	81	char *name;
	82	};
	83	struct Kex {
	84	Enc enc [MODE_MAX];
	85	Mac mac [MODE_MAX];
	86	Comp comp[MODE_MAX];
	87	int we_need;
	88	int server;
	89	char *name;
fa08c86b	90	int hostkey_type;
94ec8c6b	91	int kex_type;
7e7327a1	92	};
	93
	94	Buffer kex_init(char myproposal[PROPOSAL_MAX]);
71276795	95	void
	96	kex_exchange_kexinit(
	97	Buffer my_kexinit, Buffer peer_kexint,
	98	char *peer_proposal[PROPOSAL_MAX]);
	99	Kex *
	100	kex_choose_conf(char *cprop[PROPOSAL_MAX],
	101	char *sprop[PROPOSAL_MAX], int server);
1e3b8b07	102	int kex_derive_keys(Kex k, u_char hash, BIGNUM *shared_secret);
7e7327a1	103	void packet_set_kex(Kex *k);
71276795	104	int dh_pub_is_valid(DH dh, BIGNUM dh_pub);
94ec8c6b	105	DH dh_new_group_asc(const char , const char *);
94ec8c6b	106	DH dh_new_group(BIGNUM , BIGNUM *);
1e3b8b07	107	void dh_gen_key(DH *);
1e3b8b07	108	DH *dh_new_group1(void);
7e7327a1	109
1e3b8b07	110	u_char *
7e7327a1	111	kex_hash(
	112	char *client_version_string,
	113	char *server_version_string,
	114	char *ckexinit, int ckexinitlen,
	115	char *skexinit, int skexinitlen,
	116	char *serverhostkeyblob, int sbloblen,
	117	BIGNUM *client_dh_pub,
	118	BIGNUM *server_dh_pub,
	119	BIGNUM *shared_secret);
	120
1e3b8b07	121	u_char *
94ec8c6b	122	kex_hash_gex(
	123	char *client_version_string,
	124	char *server_version_string,
	125	char *ckexinit, int ckexinitlen,
	126	char *skexinit, int skexinitlen,
	127	char *serverhostkeyblob, int sbloblen,
	128	int minbits, BIGNUM prime, BIGNUM gen,
	129	BIGNUM *client_dh_pub,
	130	BIGNUM *server_dh_pub,
	131	BIGNUM *shared_secret);
7e7327a1	132	#endif