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