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