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/* $OpenBSD: tb_ecdh.c,v 1.4 2014/06/12 15:49:29 deraadt Exp $ */ |
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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 engine software is originally written by Nils Gura and |
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* Douglas Stebila of Sun Microsystems Laboratories. |
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* |
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*/ |
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/* ==================================================================== |
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* Copyright (c) 2000-2002 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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#include "eng_int.h" |
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/* If this symbol is defined then ENGINE_get_default_ECDH(), the function that is |
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* used by ECDH to hook in implementation code and cache defaults (etc), will |
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* display brief debugging summaries to stderr with the 'nid'. */ |
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/* #define ENGINE_ECDH_DEBUG */ |
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static ENGINE_TABLE *ecdh_table = NULL; |
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static const int dummy_nid = 1; |
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void |
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ENGINE_unregister_ECDH(ENGINE *e) |
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{ |
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engine_table_unregister(&ecdh_table, e); |
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} |
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static void |
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engine_unregister_all_ECDH(void) |
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{ |
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engine_table_cleanup(&ecdh_table); |
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} |
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int |
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ENGINE_register_ECDH(ENGINE *e) |
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{ |
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if (e->ecdh_meth) |
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return engine_table_register(&ecdh_table, |
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engine_unregister_all_ECDH, e, &dummy_nid, 1, 0); |
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return 1; |
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} |
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void |
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ENGINE_register_all_ECDH(void) |
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{ |
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ENGINE *e; |
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for (e = ENGINE_get_first(); e; e = ENGINE_get_next(e)) |
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ENGINE_register_ECDH(e); |
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} |
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int |
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ENGINE_set_default_ECDH(ENGINE *e) |
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{ |
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if (e->ecdh_meth) |
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return engine_table_register(&ecdh_table, |
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engine_unregister_all_ECDH, e, &dummy_nid, 1, 1); |
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return 1; |
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} |
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/* Exposed API function to get a functional reference from the implementation |
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* table (ie. try to get a functional reference from the tabled structural |
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* references). */ |
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ENGINE * |
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ENGINE_get_default_ECDH(void) |
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{ |
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return engine_table_select(&ecdh_table, dummy_nid); |
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} |
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/* Obtains an ECDH implementation from an ENGINE functional reference */ |
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const ECDH_METHOD * |
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ENGINE_get_ECDH(const ENGINE *e) |
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{ |
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return e->ecdh_meth; |
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} |
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/* Sets an ECDH implementation in an ENGINE structure */ |
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int |
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ENGINE_set_ECDH(ENGINE *e, const ECDH_METHOD *ecdh_meth) |
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{ |
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e->ecdh_meth = ecdh_meth; |
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return 1; |
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} |