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Dmitry Baryshkov
nettle
Commits
f199cec3
Commit
f199cec3
authored
Oct 04, 2014
by
Niels Möller
Browse files
Implemented eddsa signature internals.
parent
470b5df2
Changes
5
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ChangeLog
View file @
f199cec3
2014-10-04 Niels Möller <nisse@lysator.liu.se>
* eddsa-sign.c (_eddsa_sign, _eddsa_sign_itch): New file, new
functions.
* eddsa-hash.c (_eddsa_hash): New file and function.
* eddsa.h: Declare new functions.
* Makefile.in (hogweed_SOURCES): Added eddsa-hash.c and
eddsa-sign.c.
2014-10-03 Niels Möller <nisse@lysator.liu.se>
* testsuite/ecc-redc-test.c [NETTLE_USE_MINI_GMP]: Enable test.
...
...
Makefile.in
View file @
f199cec3
...
...
@@ -176,7 +176,8 @@ hogweed_SOURCES = sexp.c sexp-format.c \
ecc-ecdsa-sign.c ecdsa-sign.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-compress.c eddsa-decompress.c eddsa-hash.c
\
eddsa-sign.c
\
$(OPT_HOGWEED_SOURCES)
HEADERS
=
aes.h arcfour.h arctwo.h asn1.h blowfish.h
\
...
...
eddsa-hash.c
0 → 100644
View file @
f199cec3
/* eddsa-hash.c
Copyright (C) 2014 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
<assert.h>
#include
"eddsa.h"
#include
"ecc.h"
#include
"ecc-internal.h"
#include
"nettle-internal.h"
void
_eddsa_hash
(
const
struct
ecc_modulo
*
m
,
mp_limb_t
*
rp
,
const
uint8_t
*
digest
)
{
size_t
nbytes
=
1
+
m
->
bit_size
/
8
;
mpn_set_base256_le
(
rp
,
2
*
m
->
size
,
digest
,
2
*
nbytes
);
m
->
mod
(
m
,
rp
);
}
eddsa-sign.c
0 → 100644
View file @
f199cec3
/* eddsa-sign.c
Copyright (C) 2014 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
<assert.h>
#include
"eddsa.h"
#include
"ecc.h"
#include
"ecc-internal.h"
#include
"nettle-internal.h"
#include
"nettle-meta.h"
mp_size_t
_eddsa_sign_itch
(
const
struct
ecc_curve
*
ecc
)
{
return
5
*
ecc
->
p
.
size
+
ecc
->
mul_g_itch
;
}
void
_eddsa_sign
(
const
struct
ecc_curve
*
ecc
,
const
struct
nettle_hash
*
H
,
const
uint8_t
*
pub
,
void
*
ctx
,
const
mp_limb_t
*
k2
,
size_t
length
,
const
uint8_t
*
msg
,
uint8_t
*
signature
,
mp_limb_t
*
scratch
)
{
mp_size_t
size
;
size_t
nbytes
;
#define rp scratch
#define hp (scratch + size)
#define P (scratch + 2*size)
#define sp (scratch + 2*size)
#define hash ((uint8_t *) (scratch + 3*size))
#define scratch_out (scratch + 5*size)
size
=
ecc
->
p
.
size
;
nbytes
=
1
+
ecc
->
p
.
bit_size
/
8
;
assert
(
H
->
digest_size
>=
2
*
nbytes
);
H
->
update
(
ctx
,
length
,
msg
);
H
->
digest
(
ctx
,
2
*
nbytes
,
hash
);
_eddsa_hash
(
&
ecc
->
q
,
rp
,
hash
);
ecc
->
mul_g
(
ecc
,
P
,
rp
,
scratch_out
);
_eddsa_compress
(
ecc
,
signature
,
P
,
scratch_out
);
H
->
update
(
ctx
,
nbytes
,
signature
);
H
->
update
(
ctx
,
nbytes
,
pub
);
H
->
update
(
ctx
,
length
,
msg
);
H
->
digest
(
ctx
,
2
*
nbytes
,
hash
);
_eddsa_hash
(
&
ecc
->
q
,
hp
,
hash
);
ecc_modq_mul
(
ecc
,
sp
,
hp
,
k2
);
ecc_modq_add
(
ecc
,
sp
,
sp
,
rp
);
/* FIXME: Can be plain add */
/* FIXME: Special code duplicated in ecc_25519_modq and ecc_eh_to_a.
Define a suitable method? */
{
unsigned
shift
;
mp_limb_t
cy
;
assert
(
ecc
->
p
.
bit_size
==
255
);
shift
=
252
-
GMP_NUMB_BITS
*
(
ecc
->
p
.
size
-
1
);
cy
=
mpn_submul_1
(
sp
,
ecc
->
q
.
m
,
ecc
->
p
.
size
,
sp
[
ecc
->
p
.
size
-
1
]
>>
shift
);
assert
(
cy
<
2
);
cnd_add_n
(
cy
,
sp
,
ecc
->
q
.
m
,
ecc
->
p
.
size
);
}
mpn_get_base256_le
(
signature
+
nbytes
,
nbytes
,
sp
,
ecc
->
q
.
size
);
#undef rp
#undef hp
#undef P
#undef sp
#undef hash
}
eddsa.h
View file @
f199cec3
...
...
@@ -45,10 +45,14 @@ extern "C" {
#define _eddsa_compress_itch _nettle_eddsa_compress_itch
#define _eddsa_decompress _nettle_eddsa_decompress
#define _eddsa_decompress_itch _nettle_eddsa_decompress_itch
#define _eddsa_hash _nettle_eddsa_hash
#define _eddsa_sign _nettle_eddsa_sign
#define _eddsa_sign_itch _nettle_eddsa_sign_itch
#define ED25519_KEY_SIZE 32
struct
ecc_curve
;
struct
ecc_modulo
;
mp_size_t
_eddsa_compress_itch
(
const
struct
ecc_curve
*
ecc
);
...
...
@@ -63,6 +67,24 @@ _eddsa_decompress (const struct ecc_curve *ecc, mp_limb_t *p,
const
uint8_t
*
cp
,
mp_limb_t
*
scratch
);
void
_eddsa_hash
(
const
struct
ecc_modulo
*
m
,
mp_limb_t
*
rp
,
const
uint8_t
*
digest
);
mp_size_t
_eddsa_sign_itch
(
const
struct
ecc_curve
*
ecc
);
void
_eddsa_sign
(
const
struct
ecc_curve
*
ecc
,
const
struct
nettle_hash
*
H
,
const
uint8_t
*
pub
,
void
*
ctx
,
const
mp_limb_t
*
k2
,
size_t
length
,
const
uint8_t
*
msg
,
uint8_t
*
signature
,
mp_limb_t
*
scratch
);
#ifdef __cplusplus
}
#endif
...
...
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