1160814Ssimon/* crypto/engine/tb_ecdh.c */ 2160814Ssimon/* ==================================================================== 3160814Ssimon * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED. 4160814Ssimon * 5160814Ssimon * The Elliptic Curve Public-Key Crypto Library (ECC Code) included 6160814Ssimon * herein is developed by SUN MICROSYSTEMS, INC., and is contributed 7160814Ssimon * to the OpenSSL project. 8160814Ssimon * 9160814Ssimon * The ECC Code is licensed pursuant to the OpenSSL open source 10160814Ssimon * license provided below. 11160814Ssimon * 12160814Ssimon * The ECDH engine software is originally written by Nils Gura and 13160814Ssimon * Douglas Stebila of Sun Microsystems Laboratories. 14160814Ssimon * 15160814Ssimon */ 16160814Ssimon/* ==================================================================== 17160814Ssimon * Copyright (c) 2000-2002 The OpenSSL Project. All rights reserved. 18160814Ssimon * 19160814Ssimon * Redistribution and use in source and binary forms, with or without 20160814Ssimon * modification, are permitted provided that the following conditions 21160814Ssimon * are met: 22160814Ssimon * 23160814Ssimon * 1. Redistributions of source code must retain the above copyright 24280297Sjkim * notice, this list of conditions and the following disclaimer. 25160814Ssimon * 26160814Ssimon * 2. Redistributions in binary form must reproduce the above copyright 27160814Ssimon * notice, this list of conditions and the following disclaimer in 28160814Ssimon * the documentation and/or other materials provided with the 29160814Ssimon * distribution. 30160814Ssimon * 31160814Ssimon * 3. All advertising materials mentioning features or use of this 32160814Ssimon * software must display the following acknowledgment: 33160814Ssimon * "This product includes software developed by the OpenSSL Project 34160814Ssimon * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" 35160814Ssimon * 36160814Ssimon * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to 37160814Ssimon * endorse or promote products derived from this software without 38160814Ssimon * prior written permission. For written permission, please contact 39160814Ssimon * licensing@OpenSSL.org. 40160814Ssimon * 41160814Ssimon * 5. Products derived from this software may not be called "OpenSSL" 42160814Ssimon * nor may "OpenSSL" appear in their names without prior written 43160814Ssimon * permission of the OpenSSL Project. 44160814Ssimon * 45160814Ssimon * 6. Redistributions of any form whatsoever must retain the following 46160814Ssimon * acknowledgment: 47160814Ssimon * "This product includes software developed by the OpenSSL Project 48160814Ssimon * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" 49160814Ssimon * 50160814Ssimon * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY 51160814Ssimon * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 52160814Ssimon * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 53160814Ssimon * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR 54160814Ssimon * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 55160814Ssimon * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 56160814Ssimon * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 57160814Ssimon * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 58160814Ssimon * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 59160814Ssimon * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 60160814Ssimon * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 61160814Ssimon * OF THE POSSIBILITY OF SUCH DAMAGE. 62160814Ssimon * ==================================================================== 63160814Ssimon * 64160814Ssimon * This product includes cryptographic software written by Eric Young 65160814Ssimon * (eay@cryptsoft.com). This product includes software written by Tim 66160814Ssimon * Hudson (tjh@cryptsoft.com). 67160814Ssimon * 68160814Ssimon */ 69160814Ssimon 70160814Ssimon#include "eng_int.h" 71160814Ssimon 72280297Sjkim/* 73280297Sjkim * If this symbol is defined then ENGINE_get_default_ECDH(), the function 74280297Sjkim * that is used by ECDH to hook in implementation code and cache defaults 75280297Sjkim * (etc), will display brief debugging summaries to stderr with the 'nid'. 76280297Sjkim */ 77160814Ssimon/* #define ENGINE_ECDH_DEBUG */ 78160814Ssimon 79160814Ssimonstatic ENGINE_TABLE *ecdh_table = NULL; 80160814Ssimonstatic const int dummy_nid = 1; 81160814Ssimon 82160814Ssimonvoid ENGINE_unregister_ECDH(ENGINE *e) 83280297Sjkim{ 84280297Sjkim engine_table_unregister(&ecdh_table, e); 85280297Sjkim} 86160814Ssimon 87160814Ssimonstatic void engine_unregister_all_ECDH(void) 88280297Sjkim{ 89280297Sjkim engine_table_cleanup(&ecdh_table); 90280297Sjkim} 91160814Ssimon 92160814Ssimonint ENGINE_register_ECDH(ENGINE *e) 93280297Sjkim{ 94280297Sjkim if (e->ecdh_meth) 95280297Sjkim return engine_table_register(&ecdh_table, 96280297Sjkim engine_unregister_all_ECDH, e, 97280297Sjkim &dummy_nid, 1, 0); 98280297Sjkim return 1; 99280297Sjkim} 100160814Ssimon 101160814Ssimonvoid ENGINE_register_all_ECDH() 102280297Sjkim{ 103280297Sjkim ENGINE *e; 104160814Ssimon 105280297Sjkim for (e = ENGINE_get_first(); e; e = ENGINE_get_next(e)) 106280297Sjkim ENGINE_register_ECDH(e); 107280297Sjkim} 108160814Ssimon 109160814Ssimonint ENGINE_set_default_ECDH(ENGINE *e) 110280297Sjkim{ 111280297Sjkim if (e->ecdh_meth) 112280297Sjkim return engine_table_register(&ecdh_table, 113280297Sjkim engine_unregister_all_ECDH, e, 114280297Sjkim &dummy_nid, 1, 1); 115280297Sjkim return 1; 116280297Sjkim} 117160814Ssimon 118280297Sjkim/* 119280297Sjkim * Exposed API function to get a functional reference from the implementation 120160814Ssimon * table (ie. try to get a functional reference from the tabled structural 121280297Sjkim * references). 122280297Sjkim */ 123160814SsimonENGINE *ENGINE_get_default_ECDH(void) 124280297Sjkim{ 125280297Sjkim return engine_table_select(&ecdh_table, dummy_nid); 126280297Sjkim} 127160814Ssimon 128160814Ssimon/* Obtains an ECDH implementation from an ENGINE functional reference */ 129160814Ssimonconst ECDH_METHOD *ENGINE_get_ECDH(const ENGINE *e) 130280297Sjkim{ 131280297Sjkim return e->ecdh_meth; 132280297Sjkim} 133160814Ssimon 134160814Ssimon/* Sets an ECDH implementation in an ENGINE structure */ 135160814Ssimonint ENGINE_set_ECDH(ENGINE *e, const ECDH_METHOD *ecdh_meth) 136280297Sjkim{ 137280297Sjkim e->ecdh_meth = ecdh_meth; 138280297Sjkim return 1; 139280297Sjkim} 140