[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_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;
	unsigned char	*key;
	unsigned char	*iv;
};
struct Mac {
	char		*name;
	int		enabled;
	EVP_MD		*md;
	int		mac_len;
	unsigned 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;
	char		*hostkeyalg;
	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, 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_group_asc(const char *, const char *);
DH	*dh_new_group(BIGNUM *, BIGNUM *);
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);

unsigned 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
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
94ec8c6b	27	#define KEX_DH1 "diffie-hellman-group1-sha1"
	28	#define KEX_DHGEX "diffie-hellman-group-exchange-sha1"
	29	#define KEX_DSS "ssh-dss"
7e7327a1	30
	31	enum kex_init_proposals {
	32	PROPOSAL_KEX_ALGS,
	33	PROPOSAL_SERVER_HOST_KEY_ALGS,
	34	PROPOSAL_ENC_ALGS_CTOS,
	35	PROPOSAL_ENC_ALGS_STOC,
	36	PROPOSAL_MAC_ALGS_CTOS,
	37	PROPOSAL_MAC_ALGS_STOC,
	38	PROPOSAL_COMP_ALGS_CTOS,
	39	PROPOSAL_COMP_ALGS_STOC,
	40	PROPOSAL_LANG_CTOS,
	41	PROPOSAL_LANG_STOC,
	42	PROPOSAL_MAX
	43	};
	44
	45	enum kex_modes {
	46	MODE_IN,
	47	MODE_OUT,
	48	MODE_MAX
	49	};
	50
94ec8c6b	51	enum kex_exchange {
	52	DH_GRP1_SHA1,
	53	DH_GEX_SHA1
	54	};
	55
7e7327a1	56	typedef struct Kex Kex;
	57	typedef struct Mac Mac;
	58	typedef struct Comp Comp;
	59	typedef struct Enc Enc;
	60
	61	struct Enc {
94ec8c6b	62	char *name;
94ec8c6b	63	Cipher *cipher;
7e7327a1	64	int enabled;
7e7327a1	65	unsigned char *key;
7e7327a1	66	unsigned char *iv;
7e7327a1	67	};
7e7327a1	68	struct Mac {
94ec8c6b	69	char *name;
7e7327a1	70	int enabled;
94ec8c6b	71	EVP_MD *md;
7e7327a1	72	int mac_len;
	73	unsigned char *key;
	74	int key_len;
7e7327a1	75	};
	76	struct Comp {
	77	int type;
	78	int enabled;
	79	char *name;
	80	};
	81	struct Kex {
	82	Enc enc [MODE_MAX];
	83	Mac mac [MODE_MAX];
	84	Comp comp[MODE_MAX];
	85	int we_need;
	86	int server;
	87	char *name;
	88	char *hostkeyalg;
94ec8c6b	89	int kex_type;
7e7327a1	90	};
	91
	92	Buffer kex_init(char myproposal[PROPOSAL_MAX]);
71276795	93	void
	94	kex_exchange_kexinit(
	95	Buffer my_kexinit, Buffer peer_kexint,
	96	char *peer_proposal[PROPOSAL_MAX]);
	97	Kex *
	98	kex_choose_conf(char *cprop[PROPOSAL_MAX],
	99	char *sprop[PROPOSAL_MAX], int server);
7e7327a1	100	int kex_derive_keys(Kex k, unsigned char hash, BIGNUM *shared_secret);
7e7327a1	101	void packet_set_kex(Kex *k);
71276795	102	int dh_pub_is_valid(DH dh, BIGNUM dh_pub);
94ec8c6b	103	DH dh_new_group_asc(const char , const char *);
94ec8c6b	104	DH dh_new_group(BIGNUM , BIGNUM *);
71276795	105	DH *dh_new_group1();
7e7327a1	106
	107	unsigned char *
	108	kex_hash(
	109	char *client_version_string,
	110	char *server_version_string,
	111	char *ckexinit, int ckexinitlen,
	112	char *skexinit, int skexinitlen,
	113	char *serverhostkeyblob, int sbloblen,
	114	BIGNUM *client_dh_pub,
	115	BIGNUM *server_dh_pub,
	116	BIGNUM *shared_secret);
	117
94ec8c6b	118	unsigned char *
	119	kex_hash_gex(
	120	char *client_version_string,
	121	char *server_version_string,
	122	char *ckexinit, int ckexinitlen,
	123	char *skexinit, int skexinitlen,
	124	char *serverhostkeyblob, int sbloblen,
	125	int minbits, BIGNUM prime, BIGNUM gen,
	126	BIGNUM *client_dh_pub,
	127	BIGNUM *server_dh_pub,
	128	BIGNUM *shared_secret);
7e7327a1	129	#endif