LCOM1920-T02G10

/* 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 {

    char *id;

    BIGNUM *s;

    BIGNUM *v;

    const BIGNUM *g;

    const BIGNUM *N;

    char *info;

} SRP_user_pwd;

DECLARE_STACK_OF(SRP_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);

SRP_user_pwd *SRP_VBASE_get_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