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srp.h
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1 /* crypto/srp/srp.h */
2 /* Written by Christophe Renou ([email protected]) with
3  * the precious help of Peter Sylvester ([email protected])
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  *
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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  *
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36  * acknowledgment:
37  * "This product includes software developed by the OpenSSL Project
38  * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
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40  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
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54  * This product includes cryptographic software written by Eric Young
55  * ([email protected]). This product includes software written by Tim
56  * Hudson ([email protected]).
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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 
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 
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 
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 .... */
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);
164 
165 #define SRP_MINIMAL_N 1024
166 
167 #ifdef __cplusplus
168 }
169 #endif
170 
171 #endif
172 #endif