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