srp.h revision 392aa7cc7d2b122614c5393c3e357da07fd07af3
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 68extern "C" { 69#endif 70 71#include <openssl/safestack.h> 72#include <openssl/bn.h> 73#include <openssl/crypto.h> 74 75typedef struct SRP_gN_cache_st 76 { 77 char *b64_bn; 78 BIGNUM *bn; 79 } SRP_gN_cache; 80 81 82DECLARE_STACK_OF(SRP_gN_cache) 83 84typedef 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 94DECLARE_STACK_OF(SRP_user_pwd) 95 96typedef 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*/ 108typedef struct SRP_gN_st 109 { 110 char *id; 111 BIGNUM *g; 112 BIGNUM *N; 113 } SRP_gN; 114 115DECLARE_STACK_OF(SRP_gN) 116 117SRP_VBASE *SRP_VBASE_new(char *seed_key); 118int SRP_VBASE_free(SRP_VBASE *vb); 119int SRP_VBASE_init(SRP_VBASE *vb, char * verifier_file); 120SRP_user_pwd *SRP_VBASE_get_by_user(SRP_VBASE *vb, char *username); 121char *SRP_create_verifier(const char *user, const char *pass, char **salt, 122 char **verifier, const char *N, const char *g); 123int 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 */ 148char * SRP_check_known_gN_param(BIGNUM* g, BIGNUM* N); 149SRP_gN *SRP_get_default_gN(const char * id) ; 150 151/* server side .... */ 152BIGNUM *SRP_Calc_server_key(BIGNUM *A, BIGNUM *v, BIGNUM *u, BIGNUM *b, BIGNUM *N); 153BIGNUM *SRP_Calc_B(BIGNUM *b, BIGNUM *N, BIGNUM *g, BIGNUM *v); 154int SRP_Verify_A_mod_N(BIGNUM *A, BIGNUM *N); 155BIGNUM *SRP_Calc_u(BIGNUM *A, BIGNUM *B, BIGNUM *N) ; 156 157 158 159/* client side .... */ 160BIGNUM *SRP_Calc_x(BIGNUM *s, const char *user, const char *pass); 161BIGNUM *SRP_Calc_A(BIGNUM *a, BIGNUM *N, BIGNUM *g); 162BIGNUM *SRP_Calc_client_key(BIGNUM *N, BIGNUM *B, BIGNUM *g, BIGNUM *x, BIGNUM *a, BIGNUM *u); 163int 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