ECDH engine support

Submitted by: Douglas Stebila

diff --git a/crypto/engine/tb_ecdh.c b/crypto/engine/tb_ecdh.c
new file mode 100644 (file)
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+++ b/crypto/engine/tb_ecdh.c
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+/* crypto/engine/tb_ecdh.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.
+ *
+ * In addition, Sun covenants to all licensees who provide a reciprocal
+ * covenant with respect to their own patents if any, not to sue under
+ * current and future patent claims necessarily infringed by the making,
+ * using, practicing, selling, offering for sale and/or otherwise
+ * disposing of the ECC Code as delivered hereunder (or portions thereof),
+ * provided that such covenant shall not apply:
+ *  1) for code that a licensee deletes from the ECC Code;
+ *  2) separates from the ECC Code; or
+ *  3) for infringements caused by:
+ *       i) the modification of the ECC Code or
+ *      ii) the combination of the ECC Code with other software or
+ *          devices where such combination causes the infringement.
+ *
+ * The ECDH engine software is originally written by Nils Gura and
+ * Douglas Stebila of Sun Microsystems Laboratories.
+ *
+ */
+/* ====================================================================
+ * Copyright (c) 2000-2002 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).
+ *
+ */
+
+#include <openssl/evp.h>
+#include <openssl/engine.h>
+#include "eng_int.h"
+
+/* If this symbol is defined then ENGINE_get_default_ECDH(), the function that is
+ * used by ECDH to hook in implementation code and cache defaults (etc), will
+ * display brief debugging summaries to stderr with the 'nid'. */
+/* #define ENGINE_ECDH_DEBUG */
+
+static ENGINE_TABLE *ecdh_table = NULL;
+static const int dummy_nid = 1;
+
+void ENGINE_unregister_ECDH(ENGINE *e)
+       {
+       engine_table_unregister(&ecdh_table, e);
+       }
+
+static void engine_unregister_all_ECDH(void)
+       {
+       engine_table_cleanup(&ecdh_table);
+       }
+
+int ENGINE_register_ECDH(ENGINE *e)
+       {
+       if(e->ecdh_meth)
+               return engine_table_register(&ecdh_table,
+                               &engine_unregister_all_ECDH, e, &dummy_nid, 1, 0);
+       return 1;
+       }
+
+void ENGINE_register_all_ECDH()
+       {
+       ENGINE *e;
+
+       for(e=ENGINE_get_first() ; e ; e=ENGINE_get_next(e))
+               ENGINE_register_ECDH(e);
+       }
+
+int ENGINE_set_default_ECDH(ENGINE *e)
+       {
+       if(e->ecdh_meth)
+               return engine_table_register(&ecdh_table,
+                               &engine_unregister_all_ECDH, e, &dummy_nid, 1, 0);
+       return 1;
+       }
+
+/* Exposed API function to get a functional reference from the implementation
+ * table (ie. try to get a functional reference from the tabled structural
+ * references). */
+ENGINE *ENGINE_get_default_ECDH(void)
+       {
+       return engine_table_select(&ecdh_table, dummy_nid);
+       }
+
+/* Obtains an ECDH implementation from an ENGINE functional reference */
+const ECDH_METHOD *ENGINE_get_ECDH(const ENGINE *e)
+       {
+       return e->ecdh_meth;
+       }
+
+/* Sets an ECDH implementation in an ENGINE structure */
+int ENGINE_set_ECDH(ENGINE *e, const ECDH_METHOD *ecdh_meth)
+       {
+       e->ecdh_meth = ecdh_meth;
+       return 1;
+       }