1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
|
/* ecc-common.h - Declarations of common ECC code
* Copyright (C) 2013 g10 Code GmbH
*
* This file is part of Libgcrypt.
*
* Libgcrypt is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* Libgcrypt 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#ifndef GCRY_ECC_COMMON_H
#define GCRY_ECC_COMMON_H
/* Definition of a curve. */
typedef struct
{
enum gcry_mpi_ec_models model;/* The model descrinbing this curve. */
enum ecc_dialects dialect; /* The dialect used with the curve. */
gcry_mpi_t p; /* Prime specifying the field GF(p). */
gcry_mpi_t a; /* First coefficient of the Weierstrass equation. */
gcry_mpi_t b; /* Second coefficient of the Weierstrass equation.
or d as used by Twisted Edwards curves. */
mpi_point_struct G; /* Base point (generator). */
gcry_mpi_t n; /* Order of G. */
gcry_mpi_t h; /* Cofactor. */
const char *name; /* Name of the curve or NULL. */
} elliptic_curve_t;
typedef struct
{
elliptic_curve_t E;
mpi_point_struct Q; /* Q = [d]G */
} ECC_public_key;
typedef struct
{
elliptic_curve_t E;
mpi_point_struct Q;
gcry_mpi_t d;
} ECC_secret_key;
/* Set the value from S into D. */
static inline void
point_set (mpi_point_t d, mpi_point_t s)
{
mpi_set (d->x, s->x);
mpi_set (d->y, s->y);
mpi_set (d->z, s->z);
}
#define point_init(a) _gcry_mpi_point_init ((a))
#define point_free(a) _gcry_mpi_point_free_parts ((a))
/*-- ecc-curves.c --*/
gpg_err_code_t _gcry_ecc_fill_in_curve (unsigned int nbits,
const char *name,
elliptic_curve_t *curve,
unsigned int *r_nbits);
gpg_err_code_t _gcry_ecc_update_curve_param (const char *name,
enum gcry_mpi_ec_models *model,
enum ecc_dialects *dialect,
gcry_mpi_t *p, gcry_mpi_t *a,
gcry_mpi_t *b, gcry_mpi_t *g,
gcry_mpi_t *n, gcry_mpi_t *h);
const char *_gcry_ecc_get_curve (gcry_sexp_t keyparms,
int iterator,
unsigned int *r_nbits);
gcry_sexp_t _gcry_ecc_get_param_sexp (const char *name);
/*-- ecc-misc.c --*/
void _gcry_ecc_curve_free (elliptic_curve_t *E);
elliptic_curve_t _gcry_ecc_curve_copy (elliptic_curve_t E);
const char *_gcry_ecc_model2str (enum gcry_mpi_ec_models model);
const char *_gcry_ecc_dialect2str (enum ecc_dialects dialect);
gcry_mpi_t _gcry_ecc_ec2os (gcry_mpi_t x, gcry_mpi_t y, gcry_mpi_t p);
mpi_point_t _gcry_ecc_compute_public (mpi_point_t Q, mpi_ec_t ec,
mpi_point_t G, gcry_mpi_t d);
/*-- ecc.c --*/
/*-- ecc-ecdsa.c --*/
gpg_err_code_t _gcry_ecc_ecdsa_sign (gcry_mpi_t input, ECC_secret_key *skey,
gcry_mpi_t r, gcry_mpi_t s,
int flags, int hashalgo);
gpg_err_code_t _gcry_ecc_ecdsa_verify (gcry_mpi_t input, ECC_public_key *pkey,
gcry_mpi_t r, gcry_mpi_t s);
/*-- ecc-eddsa.c --*/
gpg_err_code_t _gcry_ecc_eddsa_recover_x (gcry_mpi_t x, gcry_mpi_t y, int sign,
mpi_ec_t ec);
gpg_err_code_t _gcry_ecc_eddsa_encodepoint (mpi_point_t point, mpi_ec_t ctx,
gcry_mpi_t x, gcry_mpi_t y,
int with_prefix,
unsigned char **r_buffer,
unsigned int *r_buflen);
gpg_err_code_t _gcry_ecc_eddsa_ensure_compact (gcry_mpi_t value,
unsigned int nbits);
gpg_err_code_t _gcry_ecc_eddsa_compute_h_d (unsigned char **r_digest,
gcry_mpi_t d, mpi_ec_t ec);
gpg_err_code_t _gcry_ecc_eddsa_genkey (ECC_secret_key *sk,
elliptic_curve_t *E,
mpi_ec_t ctx,
int flags);
gpg_err_code_t _gcry_ecc_eddsa_sign (gcry_mpi_t input,
ECC_secret_key *sk,
gcry_mpi_t r_r, gcry_mpi_t s,
int hashalgo, gcry_mpi_t pk);
gpg_err_code_t _gcry_ecc_eddsa_verify (gcry_mpi_t input,
ECC_public_key *pk,
gcry_mpi_t r, gcry_mpi_t s,
int hashalgo, gcry_mpi_t pkmpi);
/*-- ecc-gost.c --*/
gpg_err_code_t _gcry_ecc_gost_sign (gcry_mpi_t input, ECC_secret_key *skey,
gcry_mpi_t r, gcry_mpi_t s);
gpg_err_code_t _gcry_ecc_gost_verify (gcry_mpi_t input, ECC_public_key *pkey,
gcry_mpi_t r, gcry_mpi_t s);
#endif /*GCRY_ECC_COMMON_H*/
|
