Commit 7fdb2fec authored by Niels Möller's avatar Niels Möller

New function _eddsa_public_key.

parent db9a7557
2015-03-18 Niels Möller <nisse@diamant.hack.org>
* eddsa-pubkey.c (_eddsa_public_key, _eddsa_public_key_itch): New
file, new functions.
2015-03-14 Niels Möller <nisse@diamant.hack.org>
* ccm.c (memeql_sec): New function, more side-channel silent than
......
......@@ -179,7 +179,7 @@ hogweed_SOURCES = sexp.c sexp-format.c \
ecc-ecdsa-verify.c ecdsa-verify.c ecdsa-keygen.c \
curve25519-mul-g.c curve25519-mul.c curve25519-eh-to-x.c \
eddsa-compress.c eddsa-decompress.c eddsa-expand.c \
eddsa-hash.c eddsa-sign.c eddsa-verify.c \
eddsa-hash.c eddsa-pubkey.c eddsa-sign.c eddsa-verify.c \
ed25519-sha512-sign.c ed25519-sha512-verify.c \
$(OPT_HOGWEED_SOURCES)
......
/* eddsa-pubkey.c
Copyright (C) 2015 Niels Möller
This file is part of GNU Nettle.
GNU Nettle is free software: you can redistribute it and/or
modify it under the terms of either:
* the GNU Lesser General Public License as published by the Free
Software Foundation; either version 3 of the License, or (at your
option) any later version.
or
* 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.
or both in parallel, as here.
GNU Nettle 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 copies of the GNU General Public License and
the GNU Lesser General Public License along with this program. If
not, see http://www.gnu.org/licenses/.
*/
#if HAVE_CONFIG_H
# include "config.h"
#endif
#include "eddsa.h"
#include "ecc-internal.h"
mp_size_t
_eddsa_public_key_itch (const struct ecc_curve *ecc)
{
return 3*ecc->p.size + ecc->mul_g_itch;
}
void
_eddsa_public_key (const struct ecc_curve *ecc,
const mp_limb_t *k, uint8_t *pub, mp_limb_t *scratch)
{
#define P scratch
#define scratch_out (scratch + 3*ecc->p.size)
ecc->mul_g (ecc, P, k, scratch_out);
_eddsa_compress (ecc, pub, P, scratch_out);
#undef P
#undef scratch_out
}
......@@ -57,6 +57,8 @@ extern "C" {
#define _eddsa_sign_itch _nettle_eddsa_sign_itch
#define _eddsa_verify _nettle_eddsa_verify
#define _eddsa_verify_itch _nettle_eddsa_verify_itch
#define _eddsa_public_key_itch _nettle_eddsa_public_key_itch
#define _eddsa_public_key _nettle_eddsa_public_key
#define ED25519_KEY_SIZE 32
#define ED25519_SIGNATURE_SIZE 64
......@@ -159,6 +161,13 @@ _eddsa_expand_key (const struct ecc_curve *ecc,
mp_limb_t *k2,
mp_limb_t *scratch);
mp_size_t
_eddsa_public_key_itch (const struct ecc_curve *ecc);
void
_eddsa_public_key (const struct ecc_curve *ecc,
const mp_limb_t *k, uint8_t *pub, mp_limb_t *scratch);
#ifdef __cplusplus
}
......
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