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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