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
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
|
/*
* Copyright 2020 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the Apache License 2.0 (the "License"). You may not use
* this file except in compliance with the License. You can obtain a copy
* in the file LICENSE in the source distribution or at
* https://www.openssl.org/source/license.html
*/
#include "internal/ffc.h"
#include "internal/nelem.h"
#include "crypto/bn_dh.h"
#include "e_os.h" /* strcasecmp */
#ifndef OPENSSL_NO_DH
# define FFDHE(sz) { \
SN_ffdhe##sz, NID_ffdhe##sz, \
sz, \
&_bignum_ffdhe##sz##_p, &_bignum_ffdhe##sz##_q, &_bignum_const_2, \
}
# define MODP(sz) { \
SN_modp_##sz, NID_modp_##sz, \
sz, \
&_bignum_modp_##sz##_p, &_bignum_modp_##sz##_q, &_bignum_const_2 \
}
# define RFC5114(name, uid, sz, tag) { \
name, uid, \
sz, \
&_bignum_dh##tag##_p, &_bignum_dh##tag##_q, &_bignum_dh##tag##_g \
}
#else
# define FFDHE(sz) { SN_ffdhe##sz, NID_ffdhe##sz }
# define MODP(sz) { SN_modp_##sz, NID_modp_##sz }
# define RFC5114(name, uid, sz, tag) { name, uid }
#endif
struct dh_named_group_st {
const char *name;
int uid;
#ifndef OPENSSL_NO_DH
int32_t nbits;
const BIGNUM *p;
const BIGNUM *q;
const BIGNUM *g;
#endif
};
static const DH_NAMED_GROUP dh_named_groups[] = {
FFDHE(2048),
FFDHE(3072),
FFDHE(4096),
FFDHE(6144),
FFDHE(8192),
#ifndef FIPS_MODULE
MODP(1536),
#endif
MODP(2048),
MODP(3072),
MODP(4096),
MODP(6144),
MODP(8192),
/*
* Additional dh named groups from RFC 5114 that have a different g.
* The uid can be any unique identifier.
*/
#ifndef FIPS_MODULE
RFC5114("dh_1024_160", 1, 1024, 1024_160),
RFC5114("dh_2048_224", 2, 2048, 2048_224),
RFC5114("dh_2048_256", 3, 2048, 2048_256),
#endif
};
const DH_NAMED_GROUP *ossl_ffc_name_to_dh_named_group(const char *name)
{
size_t i;
for (i = 0; i < OSSL_NELEM(dh_named_groups); ++i) {
if (strcasecmp(dh_named_groups[i].name, name) == 0)
return &dh_named_groups[i];
}
return NULL;
}
const DH_NAMED_GROUP *ossl_ffc_uid_to_dh_named_group(int uid)
{
size_t i;
for (i = 0; i < OSSL_NELEM(dh_named_groups); ++i) {
if (dh_named_groups[i].uid == uid)
return &dh_named_groups[i];
}
return NULL;
}
#ifndef OPENSSL_NO_DH
const DH_NAMED_GROUP *ossl_ffc_numbers_to_dh_named_group(const BIGNUM *p,
const BIGNUM *q,
const BIGNUM *g)
{
size_t i;
for (i = 0; i < OSSL_NELEM(dh_named_groups); ++i) {
/* Keep searching until a matching p and g is found */
if (BN_cmp(p, dh_named_groups[i].p) == 0
&& BN_cmp(g, dh_named_groups[i].g) == 0
/* Verify q is correct if it exists */
&& ((q != NULL && BN_cmp(q, dh_named_groups[i].q) == 0)
/* Do not match RFC 5114 groups without q */
|| (q == NULL && dh_named_groups[i].uid > 3)))
return &dh_named_groups[i];
}
return NULL;
}
#endif
int ossl_ffc_named_group_get_uid(const DH_NAMED_GROUP *group)
{
if (group == NULL)
return NID_undef;
return group->uid;
}
const char *ossl_ffc_named_group_get_name(const DH_NAMED_GROUP *group)
{
if (group == NULL)
return NULL;
return group->name;
}
#ifndef OPENSSL_NO_DH
const BIGNUM *ossl_ffc_named_group_get_q(const DH_NAMED_GROUP *group)
{
if (group == NULL)
return NULL;
return group->q;
}
int ossl_ffc_named_group_set_pqg(FFC_PARAMS *ffc, const DH_NAMED_GROUP *group)
{
if (ffc == NULL || group == NULL)
return 0;
ossl_ffc_params_set0_pqg(ffc, (BIGNUM *)group->p, (BIGNUM *)group->q,
(BIGNUM *)group->g);
/* flush the cached nid, The DH layer is responsible for caching */
ffc->nid = NID_undef;
return 1;
}
#endif
|
