2f01744f82
This uses the portable Ed25519 library made by Orson Peters, which in turn uses the reference implementation made by Daniel J. Bernstein. This implementation also allows Ed25519 keys to be used for key exchange, so there is no need to add a separate implementation of Curve25519.
51 lines
1.4 KiB
C
51 lines
1.4 KiB
C
/*
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ecdh.c -- Diffie-Hellman key exchange handling
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Copyright (C) 2011-2013 Guus Sliepen <guus@tinc-vpn.org>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along
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with this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "../system.h"
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#include "ed25519.h"
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#define __TINC_ECDH_INTERNAL__
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typedef struct ecdh_t {
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uint8_t private[64];
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} ecdh_t;
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#include "../crypto.h"
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#include "../ecdh.h"
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#include "../xalloc.h"
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ecdh_t *ecdh_generate_public(void *pubkey) {
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ecdh_t *ecdh = xzalloc(sizeof *ecdh);
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uint8_t seed[32];
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randomize(seed, sizeof seed);
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ed25519_create_keypair(pubkey, ecdh->private, seed);
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return ecdh;
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}
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bool ecdh_compute_shared(ecdh_t *ecdh, const void *pubkey, void *shared) {
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ed25519_key_exchange(shared, pubkey, ecdh->private);
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free(ecdh);
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return true;
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}
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void ecdh_free(ecdh_t *ecdh) {
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free(ecdh);
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}
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