1 /* crypto/srp/srp.h */ 2 /* Written by Christophe Renou (christophe.renou (at) edelweb.fr) with 3 * the precious help of Peter Sylvester (peter.sylvester (at) 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 (at) 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 (at) cryptsoft.com). This product includes software written by Tim 56 * Hudson (tjh (at) 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
