| /* crypto/ecdh/ech_lib.c */ |
| /* ==================================================================== |
| * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED. |
| * |
| * The Elliptic Curve Public-Key Crypto Library (ECC Code) included |
| * herein is developed by SUN MICROSYSTEMS, INC., and is contributed |
| * to the OpenSSL project. |
| * |
| * The ECC Code is licensed pursuant to the OpenSSL open source |
| * license provided below. |
| * |
| * The ECDH software is originally written by Douglas Stebila of |
| * Sun Microsystems Laboratories. |
| * |
| */ |
| /* ==================================================================== |
| * Copyright (c) 1998-2003 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 |
| * openssl-core@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). |
| * |
| */ |
| |
| #include "ech_locl.h" |
| #include <string.h> |
| #ifndef OPENSSL_NO_ENGINE |
| #include <openssl/engine.h> |
| #endif |
| #include <openssl/err.h> |
| |
| const char ECDH_version[]="ECDH" OPENSSL_VERSION_PTEXT; |
| |
| static const ECDH_METHOD *default_ECDH_method = NULL; |
| |
| static void *ecdh_data_new(void); |
| static void *ecdh_data_dup(void *); |
| static void ecdh_data_free(void *); |
| |
| void ECDH_set_default_method(const ECDH_METHOD *meth) |
| { |
| default_ECDH_method = meth; |
| } |
| |
| const ECDH_METHOD *ECDH_get_default_method(void) |
| { |
| if(!default_ECDH_method) |
| default_ECDH_method = ECDH_OpenSSL(); |
| return default_ECDH_method; |
| } |
| |
| int ECDH_set_method(EC_KEY *eckey, const ECDH_METHOD *meth) |
| { |
| const ECDH_METHOD *mtmp; |
| ECDH_DATA *ecdh; |
| |
| ecdh = ecdh_check(eckey); |
| |
| if (ecdh == NULL) |
| return 0; |
| |
| mtmp = ecdh->meth; |
| #if 0 |
| if (mtmp->finish) |
| mtmp->finish(eckey); |
| #endif |
| #ifndef OPENSSL_NO_ENGINE |
| if (ecdh->engine) |
| { |
| ENGINE_finish(ecdh->engine); |
| ecdh->engine = NULL; |
| } |
| #endif |
| ecdh->meth = meth; |
| #if 0 |
| if (meth->init) |
| meth->init(eckey); |
| #endif |
| return 1; |
| } |
| |
| static ECDH_DATA *ECDH_DATA_new_method(ENGINE *engine) |
| { |
| ECDH_DATA *ret; |
| |
| ret=(ECDH_DATA *)OPENSSL_malloc(sizeof(ECDH_DATA)); |
| if (ret == NULL) |
| { |
| ECDHerr(ECDH_F_ECDH_DATA_NEW_METHOD, ERR_R_MALLOC_FAILURE); |
| return(NULL); |
| } |
| |
| ret->init = NULL; |
| |
| ret->meth = ECDH_get_default_method(); |
| ret->engine = engine; |
| #ifndef OPENSSL_NO_ENGINE |
| if (!ret->engine) |
| ret->engine = ENGINE_get_default_ECDH(); |
| if (ret->engine) |
| { |
| ret->meth = ENGINE_get_ECDH(ret->engine); |
| if (!ret->meth) |
| { |
| ECDHerr(ECDH_F_ECDH_DATA_NEW_METHOD, ERR_R_ENGINE_LIB); |
| ENGINE_finish(ret->engine); |
| OPENSSL_free(ret); |
| return NULL; |
| } |
| } |
| #endif |
| |
| ret->flags = ret->meth->flags; |
| CRYPTO_new_ex_data(CRYPTO_EX_INDEX_ECDH, ret, &ret->ex_data); |
| #if 0 |
| if ((ret->meth->init != NULL) && !ret->meth->init(ret)) |
| { |
| CRYPTO_free_ex_data(CRYPTO_EX_INDEX_ECDH, ret, &ret->ex_data); |
| OPENSSL_free(ret); |
| ret=NULL; |
| } |
| #endif |
| return(ret); |
| } |
| |
| static void *ecdh_data_new(void) |
| { |
| return (void *)ECDH_DATA_new_method(NULL); |
| } |
| |
| static void *ecdh_data_dup(void *data) |
| { |
| ECDH_DATA *r = (ECDH_DATA *)data; |
| |
| /* XXX: dummy operation */ |
| if (r == NULL) |
| return NULL; |
| |
| return (void *)ecdh_data_new(); |
| } |
| |
| void ecdh_data_free(void *data) |
| { |
| ECDH_DATA *r = (ECDH_DATA *)data; |
| |
| #ifndef OPENSSL_NO_ENGINE |
| if (r->engine) |
| ENGINE_finish(r->engine); |
| #endif |
| |
| CRYPTO_free_ex_data(CRYPTO_EX_INDEX_ECDH, r, &r->ex_data); |
| |
| OPENSSL_cleanse((void *)r, sizeof(ECDH_DATA)); |
| |
| OPENSSL_free(r); |
| } |
| |
| ECDH_DATA *ecdh_check(EC_KEY *key) |
| { |
| ECDH_DATA *ecdh_data; |
| |
| void *data = EC_KEY_get_key_method_data(key, ecdh_data_dup, |
| ecdh_data_free, ecdh_data_free); |
| if (data == NULL) |
| { |
| ecdh_data = (ECDH_DATA *)ecdh_data_new(); |
| if (ecdh_data == NULL) |
| return NULL; |
| EC_KEY_insert_key_method_data(key, (void *)ecdh_data, |
| ecdh_data_dup, ecdh_data_free, ecdh_data_free); |
| } |
| else |
| ecdh_data = (ECDH_DATA *)data; |
| |
| |
| return ecdh_data; |
| } |
| |
| int ECDH_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func, |
| CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func) |
| { |
| return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_ECDH, argl, argp, |
| new_func, dup_func, free_func); |
| } |
| |
| int ECDH_set_ex_data(EC_KEY *d, int idx, void *arg) |
| { |
| ECDH_DATA *ecdh; |
| ecdh = ecdh_check(d); |
| if (ecdh == NULL) |
| return 0; |
| return(CRYPTO_set_ex_data(&ecdh->ex_data,idx,arg)); |
| } |
| |
| void *ECDH_get_ex_data(EC_KEY *d, int idx) |
| { |
| ECDH_DATA *ecdh; |
| ecdh = ecdh_check(d); |
| if (ecdh == NULL) |
| return NULL; |
| return(CRYPTO_get_ex_data(&ecdh->ex_data,idx)); |
| } |