Preliminary implementation of Elliptic Curve Diffie-Hellman Ephemeral key exchange.

src/openssl/ecdh.h

@@ -0,0 +1,32 @@
+/*
+    ecdh.h -- header file for ecdh.c
+    Copyright (C) 2011 Guus Sliepen <guus@tinc-vpn.org>
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License along
+    with this program; if not, write to the Free Software Foundation, Inc.,
+    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+*/
+
+#ifndef __TINC_ECDH_H__
+#define __TINC_ECDH_H__
+
+#include <openssl/ecdh.h>
+
+#define ECDH_SIZE 67
+
+typedef EC_KEY *ecdh_t;
+
+extern bool ecdh_generate_public(ecdh_t *ecdh, void *pubkey);
+extern bool ecdh_compute_shared(ecdh_t *ecdh, const void *pubkey, void *shared);
+
+#endif