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/* crypto/srp/srp.h */
/*
* Written by Christophe Renou (christophe.renou@edelweb.fr) with the
* precious help of Peter Sylvester (peter.sylvester@edelweb.fr) for the
* EdelKey project and contributed to the OpenSSL project 2004.
*/
/* ====================================================================
* Copyright (c) 2004 The OpenSSL Project. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. All advertising materials mentioning features or use of this
* software must display the following acknowledgment:
* "This product includes software developed by the OpenSSL Project
* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
*
* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
* endorse or promote products derived from this software without
* prior written permission. For written permission, please contact
* licensing@OpenSSL.org.
*
* 5. Products derived from this software may not be called "OpenSSL"
* nor may "OpenSSL" appear in their names without prior written
* permission of the OpenSSL Project.
*
* 6. Redistributions of any form whatsoever must retain the following
* acknowledgment:
* "This product includes software developed by the OpenSSL Project
* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
*
* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
* ====================================================================
*
* This product includes cryptographic software written by Eric Young
* (eay@cryptsoft.com). This product includes software written by Tim
* Hudson (tjh@cryptsoft.com).
*
*/
#ifndef __SRP_H__
# define __SRP_H__
# ifndef OPENSSL_NO_SRP
# include <stdio.h>
# include <string.h>
#ifdef __cplusplus
extern "C" {
#endif
# include <openssl/safestack.h>
# include <openssl/bn.h>
# include <openssl/crypto.h>
typedef struct SRP_gN_cache_st {
char *b64_bn;
BIGNUM *bn;
} SRP_gN_cache;
DECLARE_STACK_OF(SRP_gN_cache)
typedef struct SRP_user_pwd_st {
/* Owned by us. */
char *id;
BIGNUM *s;
BIGNUM *v;
/* Not owned by us. */
const BIGNUM *g;
const BIGNUM *N;
/* Owned by us. */
char *info;
} SRP_user_pwd;
DECLARE_STACK_OF(SRP_user_pwd)
void SRP_user_pwd_free(SRP_user_pwd *user_pwd);
typedef struct SRP_VBASE_st {
STACK_OF(SRP_user_pwd) *users_pwd;
STACK_OF(SRP_gN_cache) *gN_cache;
/* to simulate a user */
char *seed_key;
BIGNUM *default_g;
BIGNUM *default_N;
} SRP_VBASE;
/*
* Structure interne pour retenir les couples N et g
*/
typedef struct SRP_gN_st {
char *id;
BIGNUM *g;
BIGNUM *N;
} SRP_gN;
DECLARE_STACK_OF(SRP_gN)
SRP_VBASE *SRP_VBASE_new(char *seed_key);
int SRP_VBASE_free(SRP_VBASE *vb);
int SRP_VBASE_init(SRP_VBASE *vb, char *verifier_file);
/* This method ignores the configured seed and fails for an unknown user. */
SRP_user_pwd *SRP_VBASE_get_by_user(SRP_VBASE *vb, char *username);
/* NOTE: unlike in SRP_VBASE_get_by_user, caller owns the returned pointer.*/
SRP_user_pwd *SRP_VBASE_get1_by_user(SRP_VBASE *vb, char *username);
char *SRP_create_verifier(const char *user, const char *pass, char **salt,
char **verifier, const char *N, const char *g);
int SRP_create_verifier_BN(const char *user, const char *pass, BIGNUM **salt,
BIGNUM **verifier, BIGNUM *N, BIGNUM *g);
# define SRP_NO_ERROR 0
# define SRP_ERR_VBASE_INCOMPLETE_FILE 1
# define SRP_ERR_VBASE_BN_LIB 2
# define SRP_ERR_OPEN_FILE 3
# define SRP_ERR_MEMORY 4
# define DB_srptype 0
# define DB_srpverifier 1
# define DB_srpsalt 2
# define DB_srpid 3
# define DB_srpgN 4
# define DB_srpinfo 5
# undef DB_NUMBER
# define DB_NUMBER 6
# define DB_SRP_INDEX 'I'
# define DB_SRP_VALID 'V'
# define DB_SRP_REVOKED 'R'
# define DB_SRP_MODIF 'v'
/* see srp.c */
char *SRP_check_known_gN_param(BIGNUM *g, BIGNUM *N);
SRP_gN *SRP_get_default_gN(const char *id);
/* server side .... */
BIGNUM *SRP_Calc_server_key(BIGNUM *A, BIGNUM *v, BIGNUM *u, BIGNUM *b,
BIGNUM *N);
BIGNUM *SRP_Calc_B(BIGNUM *b, BIGNUM *N, BIGNUM *g, BIGNUM *v);
int SRP_Verify_A_mod_N(BIGNUM *A, BIGNUM *N);
BIGNUM *SRP_Calc_u(BIGNUM *A, BIGNUM *B, BIGNUM *N);
/* client side .... */
BIGNUM *SRP_Calc_x(BIGNUM *s, const char *user, const char *pass);
BIGNUM *SRP_Calc_A(BIGNUM *a, BIGNUM *N, BIGNUM *g);
BIGNUM *SRP_Calc_client_key(BIGNUM *N, BIGNUM *B, BIGNUM *g, BIGNUM *x,
BIGNUM *a, BIGNUM *u);
int SRP_Verify_B_mod_N(BIGNUM *B, BIGNUM *N);
# define SRP_MINIMAL_N 1024
#ifdef __cplusplus
}
#endif
# endif
#endif
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