[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.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *      This product includes software developed by Markus Friedl.
 * 4. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * 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]);
DH	*new_dh_group1();
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	bignum_print(BIGNUM *b);
void	packet_set_kex(Kex *k);

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.
	12	* 3. All advertising materials mentioning features or use of this software
	13	* must display the following acknowledgement:
	14	* This product includes software developed by Markus Friedl.
	15	* 4. The name of the author may not be used to endorse or promote products
	16	* derived from this software without specific prior written permission.
	17	*
	18	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
	19	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
	20	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
	21	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
	22	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
	23	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
	24	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
	25	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
	26	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
	27	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
	28	*/
	29	#ifndef KEX_H
	30	#define KEX_H
	31
	32	#define KEX_DH1 "diffie-hellman-group1-sha1"
	33	#define KEX_DSS "ssh-dss"
	34
	35	enum kex_init_proposals {
	36	PROPOSAL_KEX_ALGS,
	37	PROPOSAL_SERVER_HOST_KEY_ALGS,
	38	PROPOSAL_ENC_ALGS_CTOS,
	39	PROPOSAL_ENC_ALGS_STOC,
	40	PROPOSAL_MAC_ALGS_CTOS,
	41	PROPOSAL_MAC_ALGS_STOC,
	42	PROPOSAL_COMP_ALGS_CTOS,
	43	PROPOSAL_COMP_ALGS_STOC,
	44	PROPOSAL_LANG_CTOS,
	45	PROPOSAL_LANG_STOC,
	46	PROPOSAL_MAX
	47	};
	48
	49	enum kex_modes {
	50	MODE_IN,
	51	MODE_OUT,
	52	MODE_MAX
	53	};
	54
	55	typedef struct Kex Kex;
	56	typedef struct Mac Mac;
	57	typedef struct Comp Comp;
	58	typedef struct Enc Enc;
	59
	60	struct Enc {
	61	int type;
	62	int enabled;
	63	int block_size;
	64	unsigned char *key;
65	unsigned char *iv;
66	int key_len;
67	int iv_len;
68	char *name;
69	};
70	struct Mac {
71	EVP_MD *md;
72	int enabled;
73	int mac_len;
74	unsigned char *key;
75	int key_len;
76	char *name;
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;
90	char *hostkeyalg;
91	};
92
93	Buffer kex_init(char myproposal[PROPOSAL_MAX]);
94	DH *new_dh_group1();
95	Kex kex_choose_conf(char cprop[PROPOSAL_MAX], char *sprop[PROPOSAL_MAX], int server);
96	int kex_derive_keys(Kex k, unsigned char hash, BIGNUM *shared_secret);
97	void bignum_print(BIGNUM *b);
98	void packet_set_kex(Kex *k);
99
100	unsigned char *
101	kex_hash(
102	char *client_version_string,
103	char *server_version_string,
104	char *ckexinit, int ckexinitlen,
105	char *skexinit, int skexinitlen,
106	char *serverhostkeyblob, int sbloblen,
107	BIGNUM *client_dh_pub,
108	BIGNUM *server_dh_pub,
109	BIGNUM *shared_secret);
110
111	#endif