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 /* Owned by us. */ 86 char *id; 87 BIGNUM *s; 88 BIGNUM *v; 89 /* Not owned by us. */ 90 const BIGNUM *g; 91 const BIGNUM *N; 92 /* Owned by us. */ 93 char *info; 94 } SRP_user_pwd; 95 96 DECLARE_STACK_OF(SRP_user_pwd) 97 98 void SRP_user_pwd_free(SRP_user_pwd *user_pwd); 99 100 typedef struct SRP_VBASE_st { 101 STACK_OF(SRP_user_pwd) *users_pwd; 102 STACK_OF(SRP_gN_cache) *gN_cache; 103 /* to simulate a user */ 104 char *seed_key; 105 BIGNUM *default_g; 106 BIGNUM *default_N; 107 } SRP_VBASE; 108 109 /* 110 * Structure interne pour retenir les couples N et g 111 */ 112 typedef struct SRP_gN_st { 113 char *id; 114 BIGNUM *g; 115 BIGNUM *N; 116 } SRP_gN; 117 118 DECLARE_STACK_OF(SRP_gN) 119 120 SRP_VBASE *SRP_VBASE_new(char *seed_key); 121 int SRP_VBASE_free(SRP_VBASE *vb); 122 int SRP_VBASE_init(SRP_VBASE *vb, char *verifier_file); 123 124 /* This method ignores the configured seed and fails for an unknown user. */ 125 SRP_user_pwd *SRP_VBASE_get_by_user(SRP_VBASE *vb, char *username); 126 /* NOTE: unlike in SRP_VBASE_get_by_user, caller owns the returned pointer.*/ 127 SRP_user_pwd *SRP_VBASE_get1_by_user(SRP_VBASE *vb, char *username); 128 129 char *SRP_create_verifier(const char *user, const char *pass, char **salt, 130 char **verifier, const char *N, const char *g); 131 int SRP_create_verifier_BN(const char *user, const char *pass, BIGNUM **salt, 132 BIGNUM **verifier, BIGNUM *N, BIGNUM *g); 133 134 # define SRP_NO_ERROR 0 135 # define SRP_ERR_VBASE_INCOMPLETE_FILE 1 136 # define SRP_ERR_VBASE_BN_LIB 2 137 # define SRP_ERR_OPEN_FILE 3 138 # define SRP_ERR_MEMORY 4 139 140 # define DB_srptype 0 141 # define DB_srpverifier 1 142 # define DB_srpsalt 2 143 # define DB_srpid 3 144 # define DB_srpgN 4 145 # define DB_srpinfo 5 146 # undef DB_NUMBER 147 # define DB_NUMBER 6 148 149 # define DB_SRP_INDEX 'I' 150 # define DB_SRP_VALID 'V' 151 # define DB_SRP_REVOKED 'R' 152 # define DB_SRP_MODIF 'v' 153 154 /* see srp.c */ 155 char *SRP_check_known_gN_param(BIGNUM *g, BIGNUM *N); 156 SRP_gN *SRP_get_default_gN(const char *id); 157 158 /* server side .... */ 159 BIGNUM *SRP_Calc_server_key(BIGNUM *A, BIGNUM *v, BIGNUM *u, BIGNUM *b, 160 BIGNUM *N); 161 BIGNUM *SRP_Calc_B(BIGNUM *b, BIGNUM *N, BIGNUM *g, BIGNUM *v); 162 int SRP_Verify_A_mod_N(BIGNUM *A, BIGNUM *N); 163 BIGNUM *SRP_Calc_u(BIGNUM *A, BIGNUM *B, BIGNUM *N); 164 165 /* client side .... */ 166 BIGNUM *SRP_Calc_x(BIGNUM *s, const char *user, const char *pass); 167 BIGNUM *SRP_Calc_A(BIGNUM *a, BIGNUM *N, BIGNUM *g); 168 BIGNUM *SRP_Calc_client_key(BIGNUM *N, BIGNUM *B, BIGNUM *g, BIGNUM *x, 169 BIGNUM *a, BIGNUM *u); 170 int SRP_Verify_B_mod_N(BIGNUM *B, BIGNUM *N); 171 172 # define SRP_MINIMAL_N 1024 173 174 #ifdef __cplusplus 175 } 176 #endif 177 178 # endif 179 #endif 180