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115 lines
3.5 KiB
C
115 lines
3.5 KiB
C
/* $OpenBSD: jpake.h,v 1.2 2009/03/05 07:18:19 djm Exp $ */
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/*
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* Copyright (c) 2008 Damien Miller. All rights reserved.
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#ifndef JPAKE_H
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#define JPAKE_H
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#include <sys/types.h>
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#include <openssl/bn.h>
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/* Set JPAKE_DEBUG in CFLAGS for privacy-violating debugging */
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#ifndef JPAKE_DEBUG
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# define JPAKE_DEBUG_BN(a)
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# define JPAKE_DEBUG_BUF(a)
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# define JPAKE_DEBUG_CTX(a)
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#else
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# define JPAKE_DEBUG_BN(a) debug3_bn a
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# define JPAKE_DEBUG_BUF(a) debug3_buf a
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# define JPAKE_DEBUG_CTX(a) jpake_dump a
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#endif /* JPAKE_DEBUG */
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#define KZP_ID_LEN 16 /* Length of client and server IDs */
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struct jpake_ctx {
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/* Parameters */
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struct modp_group *grp;
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/* Private values shared by client and server */
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BIGNUM *s; /* Secret (salted, crypted password) */
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BIGNUM *k; /* Derived key */
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/* Client private values (NULL for server) */
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BIGNUM *x1; /* random in Zq */
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BIGNUM *x2; /* random in Z*q */
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/* Server private values (NULL for server) */
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BIGNUM *x3; /* random in Zq */
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BIGNUM *x4; /* random in Z*q */
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/* Step 1: C->S */
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u_char *client_id; /* Anti-replay nonce */
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u_int client_id_len;
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BIGNUM *g_x1; /* g^x1 */
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BIGNUM *g_x2; /* g^x2 */
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/* Step 1: S->C */
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u_char *server_id; /* Anti-replay nonce */
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u_int server_id_len;
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BIGNUM *g_x3; /* g^x3 */
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BIGNUM *g_x4; /* g^x4 */
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/* Step 2: C->S */
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BIGNUM *a; /* g^((x1+x3+x4)*x2*s) */
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/* Step 2: S->C */
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BIGNUM *b; /* g^((x1+x2+x3)*x4*s) */
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/* Confirmation: C->S */
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u_char *h_k_cid_sessid; /* H(k || client_id || session_id) */
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u_int h_k_cid_sessid_len;
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/* Confirmation: S->C */
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u_char *h_k_sid_sessid; /* H(k || server_id || session_id) */
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u_int h_k_sid_sessid_len;
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};
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/* jpake.c */
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struct modp_group *jpake_default_group(void);
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void jpake_dump(struct jpake_ctx *, const char *, ...)
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__attribute__((__nonnull__ (2)))
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__attribute__((format(printf, 2, 3)));
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struct jpake_ctx *jpake_new(void);
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void jpake_free(struct jpake_ctx *);
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void jpake_step1(struct modp_group *, u_char **, u_int *,
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BIGNUM **, BIGNUM **, BIGNUM **, BIGNUM **,
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u_char **, u_int *, u_char **, u_int *);
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void jpake_step2(struct modp_group *, BIGNUM *,
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BIGNUM *, BIGNUM *, BIGNUM *, BIGNUM *,
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const u_char *, u_int, const u_char *, u_int,
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const u_char *, u_int, const u_char *, u_int,
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BIGNUM **, u_char **, u_int *);
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void jpake_confirm_hash(const BIGNUM *,
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const u_char *, u_int,
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const u_char *, u_int,
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u_char **, u_int *);
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void jpake_key_confirm(struct modp_group *, BIGNUM *, BIGNUM *,
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BIGNUM *, BIGNUM *, BIGNUM *, BIGNUM *, BIGNUM *,
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const u_char *, u_int, const u_char *, u_int,
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const u_char *, u_int, const u_char *, u_int,
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BIGNUM **, u_char **, u_int *);
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int jpake_check_confirm(const BIGNUM *, const u_char *, u_int,
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const u_char *, u_int, const u_char *, u_int);
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#endif /* JPAKE_H */
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