[gssapi-openssh.git] / openssh / jpake.h

/* $OpenBSD: jpake.h,v 1.1 2008/11/04 08:22:13 djm Exp $ */
/*
 * Copyright (c) 2008 Damien Miller.  All rights reserved.
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#ifndef JPAKE_H
#define JPAKE_H

#include <sys/types.h>

#include <openssl/bn.h>

/* Set JPAKE_DEBUG in CFLAGS for privacy-violating debugging */
#ifndef JPAKE_DEBUG
# define JPAKE_DEBUG_BN(a)
# define JPAKE_DEBUG_BUF(a)
# define JPAKE_DEBUG_CTX(a)
#else
# define JPAKE_DEBUG_BN(a)	jpake_debug3_bn a
# define JPAKE_DEBUG_BUF(a)	jpake_debug3_buf a
# define JPAKE_DEBUG_CTX(a)	jpake_dump a
#endif /* SCHNORR_DEBUG */

struct jpake_group {
	BIGNUM *p, *q, *g;
};

#define KZP_ID_LEN	16	/* Length of client and server IDs */

struct jpake_ctx {
	/* Parameters */
	struct jpake_group *grp;

	/* Private values shared by client and server */
	BIGNUM *s;			/* Secret (salted, crypted password) */
	BIGNUM *k;			/* Derived key */

	/* Client private values (NULL for server) */
	BIGNUM *x1;			/* random in Zq */
	BIGNUM *x2;			/* random in Z*q */

	/* Server private values (NULL for server) */
	BIGNUM *x3;			/* random in Zq */
	BIGNUM *x4;			/* random in Z*q */

	/* Step 1: C->S */
	u_char *client_id;		/* Anti-replay nonce */
	u_int client_id_len;
	BIGNUM *g_x1;			/* g^x1 */
	BIGNUM *g_x2;			/* g^x2 */

	/* Step 1: S->C */
	u_char *server_id;		/* Anti-replay nonce */
	u_int server_id_len;
	BIGNUM *g_x3;			/* g^x3 */
	BIGNUM *g_x4;			/* g^x4 */

	/* Step 2: C->S */
	BIGNUM *a;			/* g^((x1+x3+x4)*x2*s) */

	/* Step 2: S->C */
	BIGNUM *b;			/* g^((x1+x2+x3)*x4*s) */

	/* Confirmation: C->S */
	u_char *h_k_cid_sessid;		/* H(k || client_id || session_id) */
	u_int h_k_cid_sessid_len;

	/* Confirmation: S->C */
	u_char *h_k_sid_sessid;		/* H(k || server_id || session_id) */
	u_int h_k_sid_sessid_len;
};

/* jpake.c */
struct jpake_group *jpake_default_group(void);
BIGNUM *bn_rand_range_gt_one(const BIGNUM *high);
int hash_buffer(const u_char *, u_int, const EVP_MD *, u_char **, u_int *);
void jpake_debug3_bn(const BIGNUM *, const char *, ...)
    __attribute__((__nonnull__ (2)))
    __attribute__((format(printf, 2, 3)));
void jpake_debug3_buf(const u_char *, u_int, const char *, ...)
    __attribute__((__nonnull__ (3)))
    __attribute__((format(printf, 3, 4)));
void jpake_dump(struct jpake_ctx *, const char *, ...)
    __attribute__((__nonnull__ (2)))
    __attribute__((format(printf, 2, 3)));
struct jpake_ctx *jpake_new(void);
void jpake_free(struct jpake_ctx *);

void jpake_step1(struct jpake_group *, u_char **, u_int *,
    BIGNUM **, BIGNUM **, BIGNUM **, BIGNUM **,
    u_char **, u_int *, u_char **, u_int *);

void jpake_step2(struct jpake_group *, BIGNUM *,
    BIGNUM *, BIGNUM *, BIGNUM *, BIGNUM *,
    const u_char *, u_int, const u_char *, u_int,
    const u_char *, u_int, const u_char *, u_int,
    BIGNUM **, u_char **, u_int *);

void jpake_confirm_hash(const BIGNUM *,
    const u_char *, u_int,
    const u_char *, u_int,
    u_char **, u_int *);

void jpake_key_confirm(struct jpake_group *, BIGNUM *, BIGNUM *,
    BIGNUM *, BIGNUM *, BIGNUM *, BIGNUM *, BIGNUM *,
    const u_char *, u_int, const u_char *, u_int,
    const u_char *, u_int, const u_char *, u_int,
    BIGNUM **, u_char **, u_int *);

int jpake_check_confirm(const BIGNUM *, const u_char *, u_int,
    const u_char *, u_int, const u_char *, u_int);

/* schnorr.c */
int schnorr_sign(const BIGNUM *, const BIGNUM *, const BIGNUM *,
    const BIGNUM *, const BIGNUM *, const u_char *, u_int ,
    u_char **, u_int *);
int schnorr_verify(const BIGNUM *, const BIGNUM *, const BIGNUM *, 
    const BIGNUM *, const u_char *, u_int,
    const u_char *, u_int);

#endif /* JPAKE_H */
Commit	Line	Data
ac450140	1	/* $OpenBSD: jpake.h,v 1.1 2008/11/04 08:22:13 djm Exp $ */
	2	/*
	3	* Copyright (c) 2008 Damien Miller. All rights reserved.
	4	*
	5	* Permission to use, copy, modify, and distribute this software for any
	6	* purpose with or without fee is hereby granted, provided that the above
	7	* copyright notice and this permission notice appear in all copies.
	8	*
	9	* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
	10	* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
	11	* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
	12	* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
	13	* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
	14	* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
	15	* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
	16	*/
	17
	18	#ifndef JPAKE_H
	19	#define JPAKE_H
	20
	21	#include <sys/types.h>
	22
	23	#include <openssl/bn.h>
	24
	25	/* Set JPAKE_DEBUG in CFLAGS for privacy-violating debugging */
	26	#ifndef JPAKE_DEBUG
	27	# define JPAKE_DEBUG_BN(a)
	28	# define JPAKE_DEBUG_BUF(a)
	29	# define JPAKE_DEBUG_CTX(a)
	30	#else
	31	# define JPAKE_DEBUG_BN(a) jpake_debug3_bn a
	32	# define JPAKE_DEBUG_BUF(a) jpake_debug3_buf a
	33	# define JPAKE_DEBUG_CTX(a) jpake_dump a
	34	#endif /* SCHNORR_DEBUG */
	35
	36	struct jpake_group {
	37	BIGNUM p, q, *g;
	38	};
	39
	40	#define KZP_ID_LEN 16 /* Length of client and server IDs */
	41
	42	struct jpake_ctx {
	43	/* Parameters */
	44	struct jpake_group *grp;
	45
	46	/* Private values shared by client and server */
	47	BIGNUM s; / Secret (salted, crypted password) */
	48	BIGNUM k; / Derived key */
	49
	50	/* Client private values (NULL for server) */
	51	BIGNUM x1; / random in Zq */
	52	BIGNUM x2; / random in Zq /
	53
	54	/* Server private values (NULL for server) */
	55	BIGNUM x3; / random in Zq */
	56	BIGNUM x4; / random in Zq /
	57
	58	/* Step 1: C->S */
	59	u_char client_id; / Anti-replay nonce */
	60	u_int client_id_len;
	61	BIGNUM g_x1; / g^x1 */
	62	BIGNUM g_x2; / g^x2 */
	63
	64	/* Step 1: S->C */
65	u_char server_id; / Anti-replay nonce */
66	u_int server_id_len;
67	BIGNUM g_x3; / g^x3 */
68	BIGNUM g_x4; / g^x4 */
69
70	/* Step 2: C->S */
71	BIGNUM a; / g^((x1+x3+x4)x2s) */
72
73	/* Step 2: S->C */
74	BIGNUM b; / g^((x1+x2+x3)x4s) */
75
76	/* Confirmation: C->S */
77	u_char h_k_cid_sessid; / H(k \|\| client_id \|\| session_id) */
78	u_int h_k_cid_sessid_len;
79
80	/* Confirmation: S->C */
81	u_char h_k_sid_sessid; / H(k \|\| server_id \|\| session_id) */
82	u_int h_k_sid_sessid_len;
83	};
84
85	/* jpake.c */
86	struct jpake_group *jpake_default_group(void);
87	BIGNUM bn_rand_range_gt_one(const BIGNUM high);
88	int hash_buffer(const u_char , u_int, const EVP_MD , u_char *, u_int );
89	void jpake_debug3_bn(const BIGNUM , const char , ...)
90	__attribute__((__nonnull__ (2)))
91	__attribute__((format(printf, 2, 3)));
92	void jpake_debug3_buf(const u_char , u_int, const char , ...)
93	__attribute__((__nonnull__ (3)))
94	__attribute__((format(printf, 3, 4)));
95	void jpake_dump(struct jpake_ctx , const char , ...)
96	__attribute__((__nonnull__ (2)))
97	__attribute__((format(printf, 2, 3)));
98	struct jpake_ctx *jpake_new(void);
99	void jpake_free(struct jpake_ctx *);
100
101	void jpake_step1(struct jpake_group , u_char , u_int ,
102	BIGNUM , BIGNUM , BIGNUM , BIGNUM ,
103	u_char *, u_int , u_char *, u_int );
104
105	void jpake_step2(struct jpake_group , BIGNUM ,
106	BIGNUM , BIGNUM , BIGNUM , BIGNUM ,
107	const u_char , u_int, const u_char , u_int,
108	const u_char , u_int, const u_char , u_int,
109	BIGNUM , u_char , u_int *);
110
111	void jpake_confirm_hash(const BIGNUM *,
112	const u_char *, u_int,
113	const u_char *, u_int,
114	u_char *, u_int );
115
116	void jpake_key_confirm(struct jpake_group , BIGNUM , BIGNUM *,
117	BIGNUM , BIGNUM , BIGNUM , BIGNUM , BIGNUM *,
118	const u_char , u_int, const u_char , u_int,
119	const u_char , u_int, const u_char , u_int,
120	BIGNUM , u_char , u_int *);
121
122	int jpake_check_confirm(const BIGNUM , const u_char , u_int,
123	const u_char , u_int, const u_char , u_int);
124
125	/* schnorr.c */
126	int schnorr_sign(const BIGNUM , const BIGNUM , const BIGNUM *,
127	const BIGNUM , const BIGNUM , const u_char *, u_int ,
128	u_char *, u_int );
129	int schnorr_verify(const BIGNUM , const BIGNUM , const BIGNUM *,
130	const BIGNUM , const u_char , u_int,
131	const u_char *, u_int);
132
133	#endif /* JPAKE_H */
134