nettle  3.7.3
About: Nettle is a low-level cryptographic library.
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rsa-pkcs1-sign-tr.c
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1 /* rsa-pkcs1-sign-tr.c
2 
3  Creating timing resistant RSA signatures.
4 
5  Copyright (C) 2012 Nikos Mavrogiannopoulos
6 
7  This file is part of GNU Nettle.
8 
9  GNU Nettle is free software: you can redistribute it and/or
10  modify it under the terms of either:
11 
12  * the GNU Lesser General Public License as published by the Free
13  Software Foundation; either version 3 of the License, or (at your
14  option) any later version.
15 
16  or
17 
18  * the GNU General Public License as published by the Free
19  Software Foundation; either version 2 of the License, or (at your
20  option) any later version.
21 
22  or both in parallel, as here.
23 
24  GNU Nettle is distributed in the hope that it will be useful,
25  but WITHOUT ANY WARRANTY; without even the implied warranty of
26  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
27  General Public License for more details.
28 
29  You should have received copies of the GNU General Public License and
30  the GNU Lesser General Public License along with this program. If
31  not, see http://www.gnu.org/licenses/.
32 */
33 
34 #if HAVE_CONFIG_H
35 # include "config.h"
36 #endif
37 #include "rsa.h"
38 #include "rsa-internal.h"
39 
40 #include "pkcs1.h"
41 
42 /* Side-channel resistant version of rsa_pkcs1_sign() */
43 int
45  const struct rsa_private_key *key,
46  void *random_ctx, nettle_random_func *random,
47  size_t length, const uint8_t *digest_info,
48  mpz_t s)
49 {
50  mpz_t m;
51  int ret;
52 
53  mpz_init(m);
54 
55  ret = (pkcs1_rsa_digest_encode (m, key->size, length, digest_info)
56  && rsa_compute_root_tr (pub, key, random_ctx, random,
57  s, m));
58  mpz_clear(m);
59  return ret;
60 }
void mpz_init(mpz_t r)
Definition: mini-gmp.c:1410
void mpz_clear(mpz_t r)
Definition: mini-gmp.c:1435
__mpz_struct mpz_t[1]
Definition: mini-gmp.h:77
void nettle_random_func(void *ctx, size_t length, uint8_t *dst)
Definition: nettle-types.h:75
#define pkcs1_rsa_digest_encode
Definition: pkcs1.h:45
#define rsa_pkcs1_sign_tr
Definition: rsa.h:57
#define rsa_compute_root_tr
Definition: rsa.h:93
size_t size
Definition: rsa.h:129