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1/* $OpenBSD: srp.h,v 1.3 2014/07/10 22:45:58 jsing Exp $ */
2/* Written by Christophe Renou (christophe.renou@edelweb.fr) with
3 * the precious help of Peter Sylvester (peter.sylvester@edelweb.fr)
4 * for the EdelKey project and contributed to the OpenSSL project 2004.
5 */
6/* ====================================================================
7 * Copyright (c) 2004 The OpenSSL Project. All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 *
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 *
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in
18 * the documentation and/or other materials provided with the
19 * distribution.
20 *
21 * 3. All advertising materials mentioning features or use of this
22 * software must display the following acknowledgment:
23 * "This product includes software developed by the OpenSSL Project
24 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
25 *
26 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
27 * endorse or promote products derived from this software without
28 * prior written permission. For written permission, please contact
29 * licensing@OpenSSL.org.
30 *
31 * 5. Products derived from this software may not be called "OpenSSL"
32 * nor may "OpenSSL" appear in their names without prior written
33 * permission of the OpenSSL Project.
34 *
35 * 6. Redistributions of any form whatsoever must retain the following
36 * acknowledgment:
37 * "This product includes software developed by the OpenSSL Project
38 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
39 *
40 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
41 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
43 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
44 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
45 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
46 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
47 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
49 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
50 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
51 * OF THE POSSIBILITY OF SUCH DAMAGE.
52 * ====================================================================
53 *
54 * This product includes cryptographic software written by Eric Young
55 * (eay@cryptsoft.com). This product includes software written by Tim
56 * Hudson (tjh@cryptsoft.com).
57 *
58 */
59#ifndef __SRP_H__
60#define __SRP_H__
61
62#include <openssl/opensslconf.h>
63
64#ifndef OPENSSL_NO_SRP
65
66#include <stdio.h>
67#include <string.h>
68
69#ifdef __cplusplus
70extern "C" {
71#endif
72
73#include <openssl/safestack.h>
74#include <openssl/bn.h>
75#include <openssl/crypto.h>
76
77typedef struct SRP_gN_cache_st
78 {
79 char *b64_bn;
80 BIGNUM *bn;
81 } SRP_gN_cache;
82
83
84DECLARE_STACK_OF(SRP_gN_cache)
85
86typedef struct SRP_user_pwd_st
87 {
88 char *id;
89 BIGNUM *s;
90 BIGNUM *v;
91 const BIGNUM *g;
92 const BIGNUM *N;
93 char *info;
94 } SRP_user_pwd;
95
96DECLARE_STACK_OF(SRP_user_pwd)
97
98typedef struct SRP_VBASE_st
99 {
100 STACK_OF(SRP_user_pwd) *users_pwd;
101 STACK_OF(SRP_gN_cache) *gN_cache;
102/* to simulate a user */
103 char *seed_key;
104 BIGNUM *default_g;
105 BIGNUM *default_N;
106 } SRP_VBASE;
107
108
109/*Structure interne pour retenir les couples N et g*/
110typedef struct SRP_gN_st
111 {
112 char *id;
113 BIGNUM *g;
114 BIGNUM *N;
115 } SRP_gN;
116
117DECLARE_STACK_OF(SRP_gN)
118
119SRP_VBASE *SRP_VBASE_new(char *seed_key);
120int SRP_VBASE_free(SRP_VBASE *vb);
121int SRP_VBASE_init(SRP_VBASE *vb, char * verifier_file);
122SRP_user_pwd *SRP_VBASE_get_by_user(SRP_VBASE *vb, char *username);
123char *SRP_create_verifier(const char *user, const char *pass, char **salt,
124 char **verifier, const char *N, const char *g);
125int SRP_create_verifier_BN(const char *user, const char *pass, BIGNUM **salt, BIGNUM **verifier, BIGNUM *N, BIGNUM *g);
126
127
128#define SRP_NO_ERROR 0
129#define SRP_ERR_VBASE_INCOMPLETE_FILE 1
130#define SRP_ERR_VBASE_BN_LIB 2
131#define SRP_ERR_OPEN_FILE 3
132#define SRP_ERR_MEMORY 4
133
134#define DB_srptype 0
135#define DB_srpverifier 1
136#define DB_srpsalt 2
137#define DB_srpid 3
138#define DB_srpgN 4
139#define DB_srpinfo 5
140#undef DB_NUMBER
141#define DB_NUMBER 6
142
143#define DB_SRP_INDEX 'I'
144#define DB_SRP_VALID 'V'
145#define DB_SRP_REVOKED 'R'
146#define DB_SRP_MODIF 'v'
147
148
149/* see srp.c */
150char * SRP_check_known_gN_param(BIGNUM* g, BIGNUM* N);
151SRP_gN *SRP_get_default_gN(const char * id) ;
152
153/* server side .... */
154BIGNUM *SRP_Calc_server_key(BIGNUM *A, BIGNUM *v, BIGNUM *u, BIGNUM *b, BIGNUM *N);
155BIGNUM *SRP_Calc_B(BIGNUM *b, BIGNUM *N, BIGNUM *g, BIGNUM *v);
156int SRP_Verify_A_mod_N(BIGNUM *A, BIGNUM *N);
157BIGNUM *SRP_Calc_u(BIGNUM *A, BIGNUM *B, BIGNUM *N) ;
158
159
160
161/* client side .... */
162BIGNUM *SRP_Calc_x(BIGNUM *s, const char *user, const char *pass);
163BIGNUM *SRP_Calc_A(BIGNUM *a, BIGNUM *N, BIGNUM *g);
164BIGNUM *SRP_Calc_client_key(BIGNUM *N, BIGNUM *B, BIGNUM *g, BIGNUM *x, BIGNUM *a, BIGNUM *u);
165int SRP_Verify_B_mod_N(BIGNUM *B, BIGNUM *N);
166
167#define SRP_MINIMAL_N 1024
168
169#ifdef __cplusplus
170}
171#endif
172
173#endif
174#endif