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
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
|
/*
* Copyright (C) 2017-2018 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 <https://www.gnu.org/licenses/>
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <gnutls/gnutls.h>
#include <gnutls/crypto.h>
#include <assert.h>
#include "cert-common.h"
#include "utils.h"
#define RANDOMIZE
#include "eagain-common.h"
const char *side = "";
static void tls_log_func(int level, const char *str)
{
fprintf(stderr, "%s|<%d>| %s", side, level, str);
}
#define MAX_BUF 1024
#define MSG "Hello TLS, and hi and how are you and more data here... and more... and even more and even more more data..."
static unsigned key_update_msg_inc = 0;
static unsigned key_update_msg_out = 0;
static int hsk_callback(gnutls_session_t session, unsigned int htype,
unsigned post, unsigned int incoming, const gnutls_datum_t *msg)
{
assert(post == GNUTLS_HOOK_PRE);
assert(msg->size == 1);
if (htype == GNUTLS_HANDSHAKE_KEY_UPDATE) {
if (incoming)
key_update_msg_inc++;
else
key_update_msg_out++;
}
return 0;
}
static void run(const char *name, unsigned test)
{
/* Server stuff. */
gnutls_certificate_credentials_t ccred;
gnutls_certificate_credentials_t scred;
gnutls_session_t server;
int sret, cret;
/* Client stuff. */
gnutls_session_t client;
/* Need to enable anonymous KX specifically. */
char buffer[MAX_BUF + 1];
int ret, transferred = 0;
/* General init. */
global_init();
gnutls_global_set_log_function(tls_log_func);
if (debug)
gnutls_global_set_log_level(9);
/* Init server */
assert(gnutls_certificate_allocate_credentials(&scred) >= 0);
assert(gnutls_certificate_set_x509_key_mem(scred,
&server_ca3_localhost_cert,
&server_ca3_key,
GNUTLS_X509_FMT_PEM) >= 0);
assert(gnutls_init(&server, GNUTLS_SERVER) >= 0);
ret =
gnutls_priority_set_direct(server,
"NORMAL:-VERS-TLS-ALL:+VERS-TLS1.3",
NULL);
if (ret < 0)
exit(1);
gnutls_credentials_set(server, GNUTLS_CRD_CERTIFICATE, scred);
gnutls_transport_set_push_function(server, server_push);
gnutls_transport_set_pull_function(server, server_pull);
gnutls_transport_set_ptr(server, server);
/* Init client */
assert(gnutls_certificate_allocate_credentials(&ccred) >= 0);
assert(gnutls_certificate_set_x509_trust_mem
(ccred, &ca3_cert, GNUTLS_X509_FMT_PEM) >= 0);
gnutls_init(&client, GNUTLS_CLIENT);
ret =
gnutls_priority_set_direct(client,
"NORMAL:-VERS-TLS-ALL:+VERS-TLS1.3",
NULL);
assert(ret >= 0);
ret = gnutls_credentials_set(client, GNUTLS_CRD_CERTIFICATE, ccred);
if (ret < 0)
exit(1);
gnutls_transport_set_push_function(client, client_push);
gnutls_transport_set_pull_function(client, client_pull);
gnutls_transport_set_ptr(client, client);
HANDSHAKE(client, server);
if (debug)
success("Handshake established\n");
switch (test) {
case 0:
case 1:
success("%s: updating client's key\n", name);
do {
ret = gnutls_session_key_update(client, 0);
} while (ret == GNUTLS_E_AGAIN || ret == GNUTLS_E_INTERRUPTED);
/* server receives the client key update and sends data */
TRANSFER(client, server, MSG, strlen(MSG), buffer, MAX_BUF);
TRANSFER(server, client, MSG, strlen(MSG), buffer, MAX_BUF);
EMPTY_BUF(server, client, buffer, MAX_BUF);
if (test != 0)
break;
sec_sleep(2);
FALLTHROUGH;
case 2:
success("%s: updating server's key\n", name);
do {
ret = gnutls_session_key_update(server, 0);
} while (ret == GNUTLS_E_AGAIN || ret == GNUTLS_E_INTERRUPTED);
if (ret < 0)
fail("error in key update: %s\n", gnutls_strerror(ret));
/* client receives the key update and sends data */
TRANSFER(client, server, MSG, strlen(MSG), buffer, MAX_BUF);
TRANSFER(server, client, MSG, strlen(MSG), buffer, MAX_BUF);
EMPTY_BUF(server, client, buffer, MAX_BUF);
if (test != 0)
break;
sec_sleep(2);
FALLTHROUGH;
case 3:
success("%s: updating client's key and asking server\n", name);
do {
ret = gnutls_session_key_update(client, GNUTLS_KU_PEER);
} while (ret == GNUTLS_E_AGAIN || ret == GNUTLS_E_INTERRUPTED);
if (ret < 0)
fail("error in key update: %s\n", gnutls_strerror(ret));
/* server receives the client key update and sends data */
TRANSFER(client, server, MSG, strlen(MSG), buffer, MAX_BUF);
TRANSFER(server, client, MSG, strlen(MSG), buffer, MAX_BUF);
EMPTY_BUF(server, client, buffer, MAX_BUF);
if (test != 0)
break;
sec_sleep(2);
FALLTHROUGH;
case 4:
success("%s: updating server's key and asking client\n", name);
do {
ret = gnutls_session_key_update(server, GNUTLS_KU_PEER);
} while (ret == GNUTLS_E_AGAIN || ret == GNUTLS_E_INTERRUPTED);
if (ret < 0)
fail("error in key update: %s\n", gnutls_strerror(ret));
TRANSFER(client, server, MSG, strlen(MSG), buffer, MAX_BUF);
TRANSFER(server, client, MSG, strlen(MSG), buffer, MAX_BUF);
EMPTY_BUF(server, client, buffer, MAX_BUF);
sec_sleep(2);
break;
case 5:
success("%s: client cork\n", name);
gnutls_record_cork(client);
/* server sends key update */
do {
ret = gnutls_session_key_update(server, GNUTLS_KU_PEER);
} while (ret == GNUTLS_E_AGAIN || ret == GNUTLS_E_INTERRUPTED);
if (ret < 0)
fail("error in key update: %s\n", gnutls_strerror(ret));
/* client has data in the corked buffer */
do {
ret = gnutls_record_send(client, MSG, strlen(MSG));
} while (ret == GNUTLS_E_AGAIN || ret == GNUTLS_E_INTERRUPTED);
if (ret < 0)
fail("cannot send: %s\n", gnutls_strerror(ret));
/* client receives key update */
EMPTY_BUF(server, client, buffer, MAX_BUF);
/* client uncorks and sends key update */
do {
ret = gnutls_record_uncork(client, GNUTLS_RECORD_WAIT);
} while (ret == GNUTLS_E_AGAIN || ret == GNUTLS_E_INTERRUPTED);
if (ret < 0)
fail("cannot send: %s\n", gnutls_strerror(ret));
EMPTY_BUF(server, client, buffer, MAX_BUF);
sec_sleep(2);
break;
case 6:
key_update_msg_inc = 0;
key_update_msg_out = 0;
success("%s: callbacks are called\n", name);
gnutls_handshake_set_hook_function(client, -1, GNUTLS_HOOK_PRE, hsk_callback);
gnutls_handshake_set_hook_function(server, -1, GNUTLS_HOOK_PRE, hsk_callback);
do {
ret = gnutls_session_key_update(client, GNUTLS_KU_PEER);
} while (ret == GNUTLS_E_AGAIN || ret == GNUTLS_E_INTERRUPTED);
if (ret < 0)
fail("error in key update: %s\n", gnutls_strerror(ret));
/* server receives the client key update and sends data */
TRANSFER(client, server, MSG, strlen(MSG), buffer, MAX_BUF);
TRANSFER(server, client, MSG, strlen(MSG), buffer, MAX_BUF);
EMPTY_BUF(server, client, buffer, MAX_BUF);
assert(key_update_msg_inc == 2);
assert(key_update_msg_out == 2);
break;
}
gnutls_bye(client, GNUTLS_SHUT_WR);
gnutls_bye(server, GNUTLS_SHUT_WR);
gnutls_deinit(client);
gnutls_deinit(server);
gnutls_certificate_free_credentials(scred);
gnutls_certificate_free_credentials(ccred);
gnutls_global_deinit();
reset_buffers();
}
void doit(void)
{
run("single", 1);
run("single", 2);
run("single", 3);
run("single", 4);
run("single", 5);
run("single", 6);
run("all", 0); /* all one after each other */
}
|
