52 lines
1.4 KiB
C
52 lines
1.4 KiB
C
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/*
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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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