[openssh.git] / kex.h

/*
 * 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_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
};

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

struct Enc {
	int		type;
	int		enabled;
	int		block_size;
	unsigned char	*key;
	unsigned char	*iv;
	int		key_len;
	int		iv_len;
	char		*name;
};
struct Mac {
	EVP_MD		*md;
	int		enabled;
	int		mac_len;
	unsigned char	*key;
	int		key_len;
	char		*name;
};
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;
	char		*hostkeyalg;
};

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, unsigned char *hash, BIGNUM *shared_secret);
void	packet_set_kex(Kex *k);
int	dh_pub_is_valid(DH *dh, BIGNUM *dh_pub);
DH	*dh_new_group1();

unsigned 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);

#endif
Commit	Line	Data
7e7327a1	1	/*
	2	* Copyright (c) 2000 Markus Friedl. All rights reserved.
	3	*
	4	* Redistribution and use in source and binary forms, with or without
	5	* modification, are permitted provided that the following conditions
	6	* are met:
	7	* 1. Redistributions of source code must retain the above copyright
	8	* notice, this list of conditions and the following disclaimer.
	9	* 2. Redistributions in binary form must reproduce the above copyright
	10	* notice, this list of conditions and the following disclaimer in the
	11	* documentation and/or other materials provided with the distribution.
7e7327a1	12	*
	13	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
	14	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
	15	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
	16	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
	17	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
	18	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
	19	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
	20	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
	21	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
	22	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
	23	*/
	24	#ifndef KEX_H
	25	#define KEX_H
	26
	27	#define KEX_DH1 "diffie-hellman-group1-sha1"
	28	#define KEX_DSS "ssh-dss"
	29
	30	enum kex_init_proposals {
	31	PROPOSAL_KEX_ALGS,
	32	PROPOSAL_SERVER_HOST_KEY_ALGS,
	33	PROPOSAL_ENC_ALGS_CTOS,
	34	PROPOSAL_ENC_ALGS_STOC,
	35	PROPOSAL_MAC_ALGS_CTOS,
	36	PROPOSAL_MAC_ALGS_STOC,
	37	PROPOSAL_COMP_ALGS_CTOS,
	38	PROPOSAL_COMP_ALGS_STOC,
	39	PROPOSAL_LANG_CTOS,
	40	PROPOSAL_LANG_STOC,
	41	PROPOSAL_MAX
	42	};
	43
	44	enum kex_modes {
	45	MODE_IN,
	46	MODE_OUT,
	47	MODE_MAX
	48	};
	49
	50	typedef struct Kex Kex;
	51	typedef struct Mac Mac;
	52	typedef struct Comp Comp;
	53	typedef struct Enc Enc;
	54
	55	struct Enc {
	56	int type;
	57	int enabled;
	58	int block_size;
	59	unsigned char *key;
	60	unsigned char *iv;
	61	int key_len;
	62	int iv_len;
	63	char *name;
	64	};
	65	struct Mac {
	66	EVP_MD *md;
	67	int enabled;
	68	int mac_len;
	69	unsigned char *key;
	70	int key_len;
	71	char *name;
	72	};
	73	struct Comp {
	74	int type;
	75	int enabled;
76	char *name;
77	};
78	struct Kex {
79	Enc enc [MODE_MAX];
80	Mac mac [MODE_MAX];
81	Comp comp[MODE_MAX];
82	int we_need;
83	int server;
84	char *name;
85	char *hostkeyalg;
86	};
87
88	Buffer kex_init(char myproposal[PROPOSAL_MAX]);
71276795	89	void
	90	kex_exchange_kexinit(
	91	Buffer my_kexinit, Buffer peer_kexint,
	92	char *peer_proposal[PROPOSAL_MAX]);
	93	Kex *
	94	kex_choose_conf(char *cprop[PROPOSAL_MAX],
	95	char *sprop[PROPOSAL_MAX], int server);
7e7327a1	96	int kex_derive_keys(Kex k, unsigned char hash, BIGNUM *shared_secret);
7e7327a1	97	void packet_set_kex(Kex *k);
71276795	98	int dh_pub_is_valid(DH dh, BIGNUM dh_pub);
71276795	99	DH *dh_new_group1();
7e7327a1	100
	101	unsigned char *
	102	kex_hash(
	103	char *client_version_string,
	104	char *server_version_string,
	105	char *ckexinit, int ckexinitlen,
	106	char *skexinit, int skexinitlen,
	107	char *serverhostkeyblob, int sbloblen,
	108	BIGNUM *client_dh_pub,
	109	BIGNUM *server_dh_pub,
	110	BIGNUM *shared_secret);
	111
	112	#endif