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1 /* crypto/srp/srp.h */
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 #ifndef OPENSSL_NO_SRP
63 
64 #include <stdio.h>
65 #include <string.h>
66 
67 #ifdef  __cplusplus
68 extern "C" {
69 #endif
70 
71 #include <openssl/safestack.h>
72 #include <openssl/bn.h>
73 #include <openssl/crypto.h>
74 
75 typedef struct SRP_gN_cache_st
76 	{
77 	char *b64_bn;
78 	BIGNUM *bn;
79 	} SRP_gN_cache;
80 
81 
82 DECLARE_STACK_OF(SRP_gN_cache)
83 
84 typedef struct SRP_user_pwd_st
85 	{
86 	char *id;
87 	BIGNUM *s;
88 	BIGNUM *v;
89 	const BIGNUM *g;
90 	const BIGNUM *N;
91 	char *info;
92 	} SRP_user_pwd;
93 
94 DECLARE_STACK_OF(SRP_user_pwd)
95 
96 typedef struct SRP_VBASE_st
97 	{
98 	STACK_OF(SRP_user_pwd) *users_pwd;
99 	STACK_OF(SRP_gN_cache) *gN_cache;
100 /* to simulate a user */
101 	char *seed_key;
102 	BIGNUM *default_g;
103 	BIGNUM *default_N;
104 	} SRP_VBASE;
105 
106 
107 /*Structure interne pour retenir les couples N et g*/
108 typedef struct SRP_gN_st
109 	{
110 	char *id;
111 	BIGNUM *g;
112 	BIGNUM *N;
113 	} SRP_gN;
114 
115 DECLARE_STACK_OF(SRP_gN)
116 
117 SRP_VBASE *SRP_VBASE_new(char *seed_key);
118 int SRP_VBASE_free(SRP_VBASE *vb);
119 int SRP_VBASE_init(SRP_VBASE *vb, char * verifier_file);
120 SRP_user_pwd *SRP_VBASE_get_by_user(SRP_VBASE *vb, char *username);
121 char *SRP_create_verifier(const char *user, const char *pass, char **salt,
122 			  char **verifier, const char *N, const char *g);
123 int SRP_create_verifier_BN(const char *user, const char *pass, BIGNUM **salt, BIGNUM **verifier, BIGNUM *N, BIGNUM *g);
124 
125 
126 #define SRP_NO_ERROR 0
127 #define SRP_ERR_VBASE_INCOMPLETE_FILE 1
128 #define SRP_ERR_VBASE_BN_LIB 2
129 #define SRP_ERR_OPEN_FILE 3
130 #define SRP_ERR_MEMORY 4
131 
132 #define DB_srptype	0
133 #define DB_srpverifier	1
134 #define DB_srpsalt 	2
135 #define DB_srpid	3
136 #define DB_srpgN	4
137 #define DB_srpinfo	5
138 #undef  DB_NUMBER
139 #define DB_NUMBER       6
140 
141 #define DB_SRP_INDEX	'I'
142 #define DB_SRP_VALID	'V'
143 #define DB_SRP_REVOKED	'R'
144 #define DB_SRP_MODIF	'v'
145 
146 
147 /* see srp.c */
148 char * SRP_check_known_gN_param(BIGNUM* g, BIGNUM* N);
149 SRP_gN *SRP_get_default_gN(const char * id) ;
150 
151 /* server side .... */
152 BIGNUM *SRP_Calc_server_key(BIGNUM *A, BIGNUM *v, BIGNUM *u, BIGNUM *b, BIGNUM *N);
153 BIGNUM *SRP_Calc_B(BIGNUM *b, BIGNUM *N, BIGNUM *g, BIGNUM *v);
154 int SRP_Verify_A_mod_N(BIGNUM *A, BIGNUM *N);
155 BIGNUM *SRP_Calc_u(BIGNUM *A, BIGNUM *B, BIGNUM *N) ;
156 
157 
158 
159 /* client side .... */
160 BIGNUM *SRP_Calc_x(BIGNUM *s, const char *user, const char *pass);
161 BIGNUM *SRP_Calc_A(BIGNUM *a, BIGNUM *N, BIGNUM *g);
162 BIGNUM *SRP_Calc_client_key(BIGNUM *N, BIGNUM *B, BIGNUM *g, BIGNUM *x, BIGNUM *a, BIGNUM *u);
163 int SRP_Verify_B_mod_N(BIGNUM *B, BIGNUM *N);
164 
165 #define SRP_MINIMAL_N 1024
166 
167 #ifdef  __cplusplus
168 }
169 #endif
170 
171 #endif
172 #endif
173