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
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
|
/*
* Copyright (C) 2017 Red Hat, Inc.
*
* Author: Nikos Mavrogiannopoulos
*
* This file is part of GnuTLS.
*
* GnuTLS is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* GnuTLS 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 a copy of the GNU Lesser General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <gnutls/gnutls.h>
#include <gnutls/x509.h>
#include <gnutls/abstract.h>
#include <assert.h>
#include "utils.h"
/* This tests the key conversion from basic RSA to RSA-PSS.
*/
static void tls_log_func(int level, const char *str)
{
fprintf(stderr, "<%d>| %s", level, str);
}
const gnutls_datum_t raw_data = {
(void *) "hello there",
11
};
static void inv_sign_check(unsigned sigalgo,
gnutls_privkey_t privkey, int exp_error)
{
int ret;
gnutls_datum_t signature;
ret = gnutls_privkey_sign_data2(privkey, sigalgo, 0,
&raw_data, &signature);
if (ret != exp_error)
fail("gnutls_privkey_sign_data succeeded with %s and %s: %s\n", gnutls_pk_get_name(gnutls_privkey_get_pk_algorithm(privkey, NULL)),
gnutls_sign_get_name(sigalgo), gnutls_strerror(ret));
if (ret == 0)
gnutls_free(signature.data);
}
static void inv_encryption_check(gnutls_pk_algorithm_t algorithm,
gnutls_privkey_t privkey, int exp_error)
{
int ret;
gnutls_datum_t ct;
gnutls_pubkey_t pubkey;
assert(gnutls_pubkey_init(&pubkey) >= 0);
ret = gnutls_pubkey_import_privkey(pubkey, privkey, 0, 0);
if (ret < 0)
fail("gnutls_pubkey_import_privkey\n");
ret = gnutls_pubkey_encrypt_data(pubkey, 0, &raw_data, &ct);
if (ret != exp_error)
fail("gnutls_pubkey_encrypt_data succeeded with %s: %s\n", gnutls_pk_get_name(algorithm),
gnutls_strerror(ret));
gnutls_pubkey_deinit(pubkey);
}
static void sign_verify_data(unsigned sigalgo, gnutls_privkey_t privkey)
{
int ret;
gnutls_pubkey_t pubkey;
gnutls_datum_t signature;
ret = gnutls_privkey_sign_data2(privkey, sigalgo, 0,
&raw_data, &signature);
if (ret < 0)
fail("gnutls_x509_privkey_sign_data\n");
/* verify data */
assert(gnutls_pubkey_init(&pubkey) >= 0);
ret = gnutls_pubkey_import_privkey(pubkey, privkey, 0, 0);
if (ret < 0)
fail("gnutls_pubkey_import_privkey\n");
ret = gnutls_pubkey_verify_data2(pubkey, sigalgo,
0, &raw_data, &signature);
if (ret < 0)
fail("gnutls_pubkey_verify_data2\n");
gnutls_pubkey_deinit(pubkey);
gnutls_free(signature.data);
}
void doit(void)
{
gnutls_privkey_t pkey_rsa_pss;
gnutls_privkey_t pkey_rsa;
gnutls_x509_privkey_t tkey;
int ret;
gnutls_x509_spki_t spki;
gnutls_datum_t tmp;
ret = global_init();
if (ret < 0)
fail("global_init: %d\n", ret);
gnutls_global_set_log_function(tls_log_func);
if (debug)
gnutls_global_set_log_level(4711);
assert(gnutls_x509_spki_init(&spki)>=0);
assert(gnutls_privkey_init(&pkey_rsa) >=0);
gnutls_x509_spki_set_rsa_pss_params(spki, GNUTLS_DIG_SHA256, 32);
ret =
gnutls_privkey_generate(pkey_rsa, GNUTLS_PK_RSA, 2048, 0);
if (ret < 0) {
fail("gnutls_privkey_generate: %s\n", gnutls_strerror(ret));
}
assert(gnutls_privkey_set_spki(pkey_rsa, spki, 0)>=0);
assert(gnutls_privkey_export_x509(pkey_rsa, &tkey) >=0);
gnutls_x509_privkey_export2_pkcs8(tkey, GNUTLS_X509_FMT_PEM, NULL, 0, &tmp);
/* import RSA-PSS version of key */
assert(gnutls_privkey_init(&pkey_rsa_pss) >=0);
assert(gnutls_privkey_import_x509_raw(pkey_rsa_pss, &tmp, GNUTLS_X509_FMT_PEM, NULL, 0) >= 0);
gnutls_free(tmp.data);
/* import RSA-PSS version of key */
gnutls_privkey_deinit(pkey_rsa);
gnutls_x509_privkey_export2(tkey, GNUTLS_X509_FMT_PEM, &tmp);
assert(gnutls_privkey_init(&pkey_rsa) >=0);
assert(gnutls_privkey_import_x509_raw(pkey_rsa, &tmp, GNUTLS_X509_FMT_PEM, NULL, 0) >= 0);
gnutls_x509_privkey_deinit(tkey);
gnutls_free(tmp.data);
sign_verify_data(GNUTLS_SIGN_RSA_PSS_SHA256, pkey_rsa_pss);
sign_verify_data(GNUTLS_SIGN_RSA_PSS_RSAE_SHA256, pkey_rsa);
sign_verify_data(GNUTLS_SIGN_RSA_PSS_SHA256, pkey_rsa);
if (debug)
success("success signing with RSA-PSS-SHA256\n");
/* check whether the RSA-PSS key restrictions are being followed */
inv_encryption_check(GNUTLS_PK_RSA_PSS, pkey_rsa_pss, GNUTLS_E_INVALID_REQUEST);
inv_sign_check(GNUTLS_SIGN_RSA_SHA512, pkey_rsa_pss, GNUTLS_E_CONSTRAINT_ERROR);
inv_sign_check(GNUTLS_SIGN_RSA_SHA256, pkey_rsa_pss, GNUTLS_E_CONSTRAINT_ERROR);
inv_sign_check(GNUTLS_SIGN_RSA_PSS_SHA384, pkey_rsa_pss, GNUTLS_E_CONSTRAINT_ERROR);
inv_sign_check(GNUTLS_SIGN_RSA_PSS_SHA512, pkey_rsa_pss, GNUTLS_E_CONSTRAINT_ERROR);
inv_sign_check(GNUTLS_SIGN_RSA_PSS_RSAE_SHA384, pkey_rsa_pss, GNUTLS_E_CONSTRAINT_ERROR);
inv_sign_check(GNUTLS_SIGN_RSA_PSS_RSAE_SHA512, pkey_rsa_pss, GNUTLS_E_CONSTRAINT_ERROR);
/* check whether the RSA key is not being restricted */
inv_sign_check(GNUTLS_SIGN_RSA_SHA512, pkey_rsa, 0);
inv_sign_check(GNUTLS_SIGN_RSA_SHA256, pkey_rsa, 0);
inv_sign_check(GNUTLS_SIGN_RSA_PSS_RSAE_SHA384, pkey_rsa, 0);
inv_sign_check(GNUTLS_SIGN_RSA_PSS_RSAE_SHA512, pkey_rsa, 0);
/* an RSA key can also generate "pure" for TLS RSA-PSS signatures
* as they are essentially the same thing, and we cannot always
* know whether a key is RSA-PSS only, or not (e.g., in PKCS#11
* keys). */
inv_sign_check(GNUTLS_SIGN_RSA_PSS_SHA384, pkey_rsa, 0);
inv_sign_check(GNUTLS_SIGN_RSA_PSS_SHA512, pkey_rsa, 0);
gnutls_privkey_deinit(pkey_rsa);
gnutls_privkey_deinit(pkey_rsa_pss);
gnutls_x509_spki_deinit(spki);
gnutls_global_deinit();
}
|
