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
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
|
/*
* Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License").
* You may not use this file except in compliance with the License.
* A copy of the License is located at
*
* http://aws.amazon.com/apache2.0
*
* or in the "license" file accompanying this file. This file is distributed
* on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
* express or implied. See the License for the specific language governing
* permissions and limitations under the License.
*/
#include "tls/s2n_renegotiate.h"
#include "s2n_test.h"
#include "testlib/s2n_testlib.h"
#include "tls/s2n_record.h"
#include "tls/s2n_tls.h"
#include "utils/s2n_safety.h"
#include "utils/s2n_socket.h"
struct s2n_reneg_test_case {
uint8_t protocol_version;
struct s2n_cipher_suite *cipher_suite;
uint8_t max_frag_code;
};
const struct s2n_reneg_test_case dhe_test_cases[] = {
{
.protocol_version = S2N_SSLv3,
.cipher_suite = &s2n_dhe_rsa_with_3des_ede_cbc_sha,
.max_frag_code = 0,
},
{
.protocol_version = S2N_TLS10,
.cipher_suite = &s2n_dhe_rsa_with_aes_128_cbc_sha,
.max_frag_code = S2N_TLS_MAX_FRAG_LEN_512,
},
{
.protocol_version = S2N_TLS11,
.cipher_suite = &s2n_dhe_rsa_with_aes_256_cbc_sha,
.max_frag_code = S2N_TLS_MAX_FRAG_LEN_1024,
},
{
.protocol_version = S2N_TLS12,
.cipher_suite = &s2n_dhe_rsa_with_aes_128_cbc_sha256,
.max_frag_code = 0,
},
{
.protocol_version = S2N_TLS12,
.cipher_suite = &s2n_dhe_rsa_with_aes_256_gcm_sha384,
.max_frag_code = S2N_TLS_MAX_FRAG_LEN_2048,
},
{
.protocol_version = S2N_TLS12,
.cipher_suite = &s2n_dhe_rsa_with_chacha20_poly1305_sha256,
.max_frag_code = S2N_TLS_MAX_FRAG_LEN_4096,
},
};
int main(int argc, char *argv[])
{
BEGIN_TEST();
DEFER_CLEANUP(struct s2n_cert_chain_and_key *chain_and_key = NULL, s2n_cert_chain_and_key_ptr_free);
EXPECT_SUCCESS(s2n_test_cert_chain_and_key_new(&chain_and_key,
S2N_DEFAULT_TEST_CERT_CHAIN, S2N_DEFAULT_TEST_PRIVATE_KEY));
DEFER_CLEANUP(struct s2n_cert_chain_and_key *ecdsa_chain_and_key = NULL, s2n_cert_chain_and_key_ptr_free);
EXPECT_SUCCESS(s2n_test_cert_chain_and_key_new(&ecdsa_chain_and_key,
S2N_DEFAULT_ECDSA_TEST_CERT_CHAIN, S2N_DEFAULT_ECDSA_TEST_PRIVATE_KEY));
char dh_params[S2N_MAX_TEST_PEM_SIZE] = { 0 };
EXPECT_SUCCESS(s2n_read_test_pem(S2N_DEFAULT_TEST_DHPARAMS, dh_params, sizeof(dh_params)));
DEFER_CLEANUP(struct s2n_config *config = s2n_config_new(), s2n_config_ptr_free);
EXPECT_NOT_NULL(config);
EXPECT_SUCCESS(s2n_config_set_unsafe_for_testing(config));
EXPECT_SUCCESS(s2n_config_add_cert_chain_and_key_to_store(config, chain_and_key));
EXPECT_SUCCESS(s2n_config_set_cipher_preferences(config, "20240501"));
uint8_t app_data[] = "smaller hello world";
uint8_t large_app_data[S2N_TLS_MAXIMUM_FRAGMENT_LENGTH] = "hello world and a lot of zeroes";
s2n_blocked_status blocked = S2N_NOT_BLOCKED;
/* Test s2n_renegotiate_wipe */
{
/* Default IO unaffected by wipe */
{
DEFER_CLEANUP(struct s2n_connection *server_conn = s2n_connection_new(S2N_SERVER), s2n_connection_ptr_free);
EXPECT_NOT_NULL(server_conn);
EXPECT_SUCCESS(s2n_connection_set_config(server_conn, config));
DEFER_CLEANUP(struct s2n_connection *client_conn = s2n_connection_new(S2N_CLIENT), s2n_connection_ptr_free);
EXPECT_NOT_NULL(client_conn);
EXPECT_SUCCESS(s2n_connection_set_config(client_conn, config));
/* "io_pair" just uses file descriptors and the default io callbacks */
DEFER_CLEANUP(struct s2n_test_io_pair io_pair = { 0 }, s2n_io_pair_close);
EXPECT_SUCCESS(s2n_io_pair_init_non_blocking(&io_pair));
EXPECT_SUCCESS(s2n_connection_set_io_pair(client_conn, &io_pair));
EXPECT_SUCCESS(s2n_connection_set_io_pair(server_conn, &io_pair));
EXPECT_EQUAL(client_conn->send, s2n_socket_write);
EXPECT_TRUE(client_conn->managed_send_io);
EXPECT_EQUAL(client_conn->recv, s2n_socket_read);
EXPECT_TRUE(client_conn->managed_recv_io);
EXPECT_SUCCESS(s2n_negotiate_test_server_and_client(server_conn, client_conn));
EXPECT_SUCCESS(s2n_renegotiate_wipe(client_conn));
uint8_t recv_buffer[sizeof(app_data)] = { 0 };
EXPECT_EQUAL(s2n_send(server_conn, app_data, sizeof(app_data), &blocked), sizeof(app_data));
EXPECT_EQUAL(s2n_recv(client_conn, recv_buffer, sizeof(recv_buffer), &blocked), sizeof(app_data));
EXPECT_BYTEARRAY_EQUAL(recv_buffer, app_data, sizeof(app_data));
};
/* Custom IO callbacks unaffected by wipe */
{
DEFER_CLEANUP(struct s2n_connection *server_conn = s2n_connection_new(S2N_SERVER), s2n_connection_ptr_free);
EXPECT_NOT_NULL(server_conn);
EXPECT_SUCCESS(s2n_connection_set_config(server_conn, config));
DEFER_CLEANUP(struct s2n_connection *client_conn = s2n_connection_new(S2N_CLIENT), s2n_connection_ptr_free);
EXPECT_NOT_NULL(client_conn);
EXPECT_SUCCESS(s2n_connection_set_config(client_conn, config));
/* "io_stuffers" use custom IO callbacks written for tests */
DEFER_CLEANUP(struct s2n_stuffer in = { 0 }, s2n_stuffer_free);
DEFER_CLEANUP(struct s2n_stuffer out = { 0 }, s2n_stuffer_free);
EXPECT_SUCCESS(s2n_stuffer_growable_alloc(&in, 0));
EXPECT_SUCCESS(s2n_stuffer_growable_alloc(&out, 0));
EXPECT_SUCCESS(s2n_connection_set_io_stuffers(&in, &out, client_conn));
EXPECT_SUCCESS(s2n_connection_set_io_stuffers(&out, &in, server_conn));
EXPECT_NOT_EQUAL(client_conn->send, s2n_socket_write);
EXPECT_FALSE(client_conn->managed_send_io);
EXPECT_NOT_EQUAL(client_conn->recv, s2n_socket_read);
EXPECT_FALSE(client_conn->managed_recv_io);
EXPECT_SUCCESS(s2n_negotiate_test_server_and_client(server_conn, client_conn));
EXPECT_SUCCESS(s2n_renegotiate_wipe(client_conn));
uint8_t recv_buffer[sizeof(app_data)] = { 0 };
EXPECT_EQUAL(s2n_send(server_conn, app_data, sizeof(app_data), &blocked), sizeof(app_data));
EXPECT_EQUAL(s2n_recv(client_conn, recv_buffer, sizeof(recv_buffer), &blocked), sizeof(app_data));
EXPECT_BYTEARRAY_EQUAL(recv_buffer, app_data, sizeof(app_data));
};
/* Fragment size unaffected by wipe */
{
DEFER_CLEANUP(struct s2n_connection *server_conn = s2n_connection_new(S2N_SERVER), s2n_connection_ptr_free);
EXPECT_NOT_NULL(server_conn);
EXPECT_SUCCESS(s2n_connection_set_config(server_conn, config));
DEFER_CLEANUP(struct s2n_connection *client_conn = s2n_connection_new(S2N_CLIENT), s2n_connection_ptr_free);
EXPECT_NOT_NULL(client_conn);
EXPECT_SUCCESS(s2n_connection_set_config(client_conn, config));
DEFER_CLEANUP(struct s2n_stuffer in = { 0 }, s2n_stuffer_free);
DEFER_CLEANUP(struct s2n_stuffer out = { 0 }, s2n_stuffer_free);
EXPECT_SUCCESS(s2n_stuffer_growable_alloc(&in, 0));
EXPECT_SUCCESS(s2n_stuffer_growable_alloc(&out, 0));
EXPECT_SUCCESS(s2n_connection_set_io_stuffers(&in, &out, client_conn));
EXPECT_SUCCESS(s2n_connection_set_io_stuffers(&out, &in, server_conn));
EXPECT_SUCCESS(s2n_connection_prefer_low_latency(client_conn));
EXPECT_SUCCESS(s2n_negotiate_test_server_and_client(server_conn, client_conn));
EXPECT_EQUAL(s2n_send(client_conn, app_data, sizeof(app_data), &blocked), sizeof(app_data));
size_t original_out_size = s2n_stuffer_data_available(&out);
EXPECT_SUCCESS(s2n_stuffer_wipe(&out));
EXPECT_SUCCESS(s2n_renegotiate_wipe(client_conn));
EXPECT_EQUAL(s2n_send(client_conn, app_data, sizeof(app_data), &blocked), sizeof(app_data));
size_t wiped_out_size = s2n_stuffer_data_available(&out);
EXPECT_EQUAL(original_out_size, wiped_out_size);
};
/* Forced very small fragment size unaffected by wipe */
{
DEFER_CLEANUP(struct s2n_connection *server_conn = s2n_connection_new(S2N_SERVER), s2n_connection_ptr_free);
EXPECT_NOT_NULL(server_conn);
EXPECT_SUCCESS(s2n_connection_set_config(server_conn, config));
DEFER_CLEANUP(struct s2n_connection *client_conn = s2n_connection_new(S2N_CLIENT), s2n_connection_ptr_free);
EXPECT_NOT_NULL(client_conn);
EXPECT_SUCCESS(s2n_connection_set_config(client_conn, config));
DEFER_CLEANUP(struct s2n_stuffer in = { 0 }, s2n_stuffer_free);
DEFER_CLEANUP(struct s2n_stuffer out = { 0 }, s2n_stuffer_free);
EXPECT_SUCCESS(s2n_stuffer_growable_alloc(&in, 0));
EXPECT_SUCCESS(s2n_stuffer_growable_alloc(&out, 0));
EXPECT_SUCCESS(s2n_connection_set_io_stuffers(&in, &out, client_conn));
EXPECT_SUCCESS(s2n_connection_set_io_stuffers(&out, &in, server_conn));
EXPECT_SUCCESS(s2n_negotiate_test_server_and_client(server_conn, client_conn));
const size_t small_frag_len = S2N_MIN_SEND_BUFFER_FRAGMENT_SIZE;
client_conn->max_outgoing_fragment_length = small_frag_len;
EXPECT_EQUAL(s2n_send(client_conn, app_data, sizeof(app_data), &blocked), sizeof(app_data));
size_t original_out_size = s2n_stuffer_data_available(&out);
EXPECT_SUCCESS(s2n_stuffer_wipe(&out));
EXPECT_SUCCESS(s2n_renegotiate_wipe(client_conn));
EXPECT_EQUAL(client_conn->max_outgoing_fragment_length, small_frag_len);
EXPECT_EQUAL(s2n_send(client_conn, app_data, sizeof(app_data), &blocked), sizeof(app_data));
size_t wiped_out_size = s2n_stuffer_data_available(&out);
EXPECT_EQUAL(original_out_size, wiped_out_size);
};
/* Handshake succeeds after wipe */
{
DEFER_CLEANUP(struct s2n_connection *server_conn = s2n_connection_new(S2N_SERVER), s2n_connection_ptr_free);
EXPECT_NOT_NULL(server_conn);
EXPECT_SUCCESS(s2n_connection_set_config(server_conn, config));
DEFER_CLEANUP(struct s2n_connection *client_conn = s2n_connection_new(S2N_CLIENT), s2n_connection_ptr_free);
EXPECT_NOT_NULL(client_conn);
EXPECT_SUCCESS(s2n_connection_set_config(client_conn, config));
DEFER_CLEANUP(struct s2n_test_io_pair io_pair = { 0 }, s2n_io_pair_close);
EXPECT_SUCCESS(s2n_io_pair_init_non_blocking(&io_pair));
EXPECT_SUCCESS(s2n_connection_set_io_pair(client_conn, &io_pair));
EXPECT_SUCCESS(s2n_connection_set_io_pair(server_conn, &io_pair));
EXPECT_SUCCESS(s2n_negotiate_test_server_and_client(server_conn, client_conn));
EXPECT_SUCCESS(s2n_renegotiate_wipe(client_conn));
EXPECT_SUCCESS(s2n_renegotiate_wipe(server_conn));
EXPECT_SUCCESS(s2n_negotiate_test_server_and_client(server_conn, client_conn));
};
/* Handshake with added client auth succeeds after wipe */
{
DEFER_CLEANUP(struct s2n_connection *server_conn = s2n_connection_new(S2N_SERVER), s2n_connection_ptr_free);
EXPECT_NOT_NULL(server_conn);
EXPECT_SUCCESS(s2n_connection_set_config(server_conn, config));
DEFER_CLEANUP(struct s2n_connection *client_conn = s2n_connection_new(S2N_CLIENT), s2n_connection_ptr_free);
EXPECT_NOT_NULL(client_conn);
EXPECT_SUCCESS(s2n_connection_set_config(client_conn, config));
DEFER_CLEANUP(struct s2n_test_io_pair io_pair = { 0 }, s2n_io_pair_close);
EXPECT_SUCCESS(s2n_io_pair_init_non_blocking(&io_pair));
EXPECT_SUCCESS(s2n_connection_set_io_pair(client_conn, &io_pair));
EXPECT_SUCCESS(s2n_connection_set_io_pair(server_conn, &io_pair));
EXPECT_SUCCESS(s2n_connection_set_client_auth_type(client_conn, S2N_CERT_AUTH_NONE));
EXPECT_SUCCESS(s2n_connection_set_client_auth_type(server_conn, S2N_CERT_AUTH_NONE));
EXPECT_SUCCESS(s2n_negotiate_test_server_and_client(server_conn, client_conn));
EXPECT_FALSE(IS_CLIENT_AUTH_HANDSHAKE(client_conn));
EXPECT_FALSE(IS_CLIENT_AUTH_HANDSHAKE(server_conn));
EXPECT_SUCCESS(s2n_renegotiate_wipe(client_conn));
EXPECT_SUCCESS(s2n_renegotiate_wipe(server_conn));
EXPECT_SUCCESS(s2n_connection_set_client_auth_type(client_conn, S2N_CERT_AUTH_REQUIRED));
EXPECT_SUCCESS(s2n_connection_set_client_auth_type(server_conn, S2N_CERT_AUTH_REQUIRED));
EXPECT_SUCCESS(s2n_negotiate_test_server_and_client(server_conn, client_conn));
EXPECT_TRUE(IS_CLIENT_AUTH_HANDSHAKE(client_conn));
EXPECT_FALSE(IS_CLIENT_AUTH_NO_CERT(client_conn));
EXPECT_TRUE(IS_CLIENT_AUTH_HANDSHAKE(server_conn));
EXPECT_FALSE(IS_CLIENT_AUTH_NO_CERT(server_conn));
};
/* Handshake with different fragment length succeeds after wipe */
{
DEFER_CLEANUP(struct s2n_config *small_frag_config = s2n_config_new(), s2n_config_ptr_free);
EXPECT_NOT_NULL(small_frag_config);
EXPECT_SUCCESS(s2n_config_set_unsafe_for_testing(small_frag_config));
EXPECT_SUCCESS(s2n_config_add_cert_chain_and_key_to_store(small_frag_config, chain_and_key));
EXPECT_SUCCESS(s2n_config_set_cipher_preferences(small_frag_config, "20240501"));
EXPECT_SUCCESS(s2n_config_accept_max_fragment_length(small_frag_config));
EXPECT_SUCCESS(s2n_config_send_max_fragment_length(small_frag_config, S2N_TLS_MAX_FRAG_LEN_512));
DEFER_CLEANUP(struct s2n_config *larger_frag_config = s2n_config_new(), s2n_config_ptr_free);
EXPECT_NOT_NULL(larger_frag_config);
EXPECT_SUCCESS(s2n_config_set_unsafe_for_testing(larger_frag_config));
EXPECT_SUCCESS(s2n_config_add_cert_chain_and_key_to_store(larger_frag_config, chain_and_key));
EXPECT_SUCCESS(s2n_config_set_cipher_preferences(larger_frag_config, "20240501"));
EXPECT_SUCCESS(s2n_config_accept_max_fragment_length(larger_frag_config));
EXPECT_SUCCESS(s2n_config_send_max_fragment_length(larger_frag_config, S2N_TLS_MAX_FRAG_LEN_4096));
DEFER_CLEANUP(struct s2n_connection *server_conn = s2n_connection_new(S2N_SERVER), s2n_connection_ptr_free);
EXPECT_NOT_NULL(server_conn);
EXPECT_SUCCESS(s2n_connection_set_config(server_conn, config));
DEFER_CLEANUP(struct s2n_connection *client_conn = s2n_connection_new(S2N_CLIENT), s2n_connection_ptr_free);
EXPECT_NOT_NULL(client_conn);
EXPECT_SUCCESS(s2n_connection_set_config(client_conn, config));
DEFER_CLEANUP(struct s2n_test_io_pair io_pair = { 0 }, s2n_io_pair_close);
EXPECT_SUCCESS(s2n_io_pair_init_non_blocking(&io_pair));
EXPECT_SUCCESS(s2n_connection_set_io_pair(client_conn, &io_pair));
EXPECT_SUCCESS(s2n_connection_set_io_pair(server_conn, &io_pair));
EXPECT_SUCCESS(s2n_connection_set_config(server_conn, larger_frag_config));
EXPECT_SUCCESS(s2n_connection_set_config(client_conn, larger_frag_config));
EXPECT_SUCCESS(s2n_negotiate_test_server_and_client(server_conn, client_conn));
EXPECT_SUCCESS(s2n_renegotiate_wipe(client_conn));
EXPECT_SUCCESS(s2n_renegotiate_wipe(server_conn));
EXPECT_SUCCESS(s2n_connection_set_config(server_conn, small_frag_config));
EXPECT_SUCCESS(s2n_connection_set_config(client_conn, small_frag_config));
EXPECT_SUCCESS(s2n_negotiate_test_server_and_client(server_conn, client_conn));
EXPECT_SUCCESS(s2n_renegotiate_wipe(client_conn));
EXPECT_SUCCESS(s2n_renegotiate_wipe(server_conn));
EXPECT_SUCCESS(s2n_connection_set_config(server_conn, larger_frag_config));
EXPECT_SUCCESS(s2n_connection_set_config(client_conn, larger_frag_config));
EXPECT_SUCCESS(s2n_negotiate_test_server_and_client(server_conn, client_conn));
};
/* renegotiation_info is non-empty after wipe */
{
DEFER_CLEANUP(struct s2n_connection *server_conn = s2n_connection_new(S2N_SERVER), s2n_connection_ptr_free);
EXPECT_NOT_NULL(server_conn);
EXPECT_SUCCESS(s2n_connection_set_config(server_conn, config));
DEFER_CLEANUP(struct s2n_connection *client_conn = s2n_connection_new(S2N_CLIENT), s2n_connection_ptr_free);
EXPECT_NOT_NULL(client_conn);
EXPECT_SUCCESS(s2n_connection_set_config(client_conn, config));
DEFER_CLEANUP(struct s2n_test_io_pair io_pair = { 0 }, s2n_io_pair_close);
EXPECT_SUCCESS(s2n_io_pair_init_non_blocking(&io_pair));
EXPECT_SUCCESS(s2n_connections_set_io_pair(client_conn, server_conn, &io_pair));
EXPECT_SUCCESS(s2n_negotiate_test_server_and_client(server_conn, client_conn));
/* Verify that the renegotiation_info was empty / missing */
ssize_t renegotiation_info_len = s2n_client_hello_get_extension_length(&server_conn->client_hello,
S2N_EXTENSION_RENEGOTIATION_INFO);
EXPECT_EQUAL(renegotiation_info_len, 0);
EXPECT_SUCCESS(s2n_renegotiate_wipe(client_conn));
EXPECT_TRUE(client_conn->handshake.finished_len > 0);
EXPECT_SUCCESS(s2n_renegotiate_wipe(server_conn));
EXPECT_SUCCESS(s2n_negotiate_test_server_and_client(server_conn, client_conn));
/* Verify that the renegotiation_info was not empty / missing */
renegotiation_info_len = s2n_client_hello_get_extension_length(&server_conn->client_hello,
S2N_EXTENSION_RENEGOTIATION_INFO);
EXPECT_TRUE(renegotiation_info_len > sizeof(uint8_t));
};
/* Wipe of insecure connection not allowed */
{
DEFER_CLEANUP(struct s2n_connection *client_conn = s2n_connection_new(S2N_CLIENT), s2n_connection_ptr_free);
EXPECT_NOT_NULL(client_conn);
EXPECT_SUCCESS(s2n_connection_set_config(client_conn, config));
client_conn->actual_protocol_version = S2N_TLS12;
EXPECT_FALSE(client_conn->secure_renegotiation);
EXPECT_FAILURE_WITH_ERRNO(s2n_renegotiate_wipe(client_conn), S2N_ERR_NO_RENEGOTIATION);
client_conn->secure_renegotiation = true;
EXPECT_SUCCESS(s2n_renegotiate_wipe(client_conn));
};
/* Wipe of TLS1.3 connection not allowed */
{
DEFER_CLEANUP(struct s2n_connection *client_conn = s2n_connection_new(S2N_CLIENT), s2n_connection_ptr_free);
EXPECT_NOT_NULL(client_conn);
EXPECT_SUCCESS(s2n_connection_set_config(client_conn, config));
client_conn->secure_renegotiation = true;
EXPECT_TRUE(client_conn->actual_protocol_version > S2N_TLS12);
EXPECT_FAILURE_WITH_ERRNO(s2n_renegotiate_wipe(client_conn), S2N_ERR_PROTOCOL_VERSION_UNSUPPORTED);
client_conn->actual_protocol_version = S2N_TLS12;
EXPECT_SUCCESS(s2n_renegotiate_wipe(client_conn));
};
/* Wipe mid-write not allowed */
{
DEFER_CLEANUP(struct s2n_connection *server_conn = s2n_connection_new(S2N_SERVER), s2n_connection_ptr_free);
EXPECT_NOT_NULL(server_conn);
EXPECT_SUCCESS(s2n_connection_set_config(server_conn, config));
DEFER_CLEANUP(struct s2n_connection *client_conn = s2n_connection_new(S2N_CLIENT), s2n_connection_ptr_free);
EXPECT_NOT_NULL(client_conn);
EXPECT_SUCCESS(s2n_connection_set_config(client_conn, config));
DEFER_CLEANUP(struct s2n_stuffer in = { 0 }, s2n_stuffer_free);
DEFER_CLEANUP(struct s2n_stuffer out = { 0 }, s2n_stuffer_free);
EXPECT_SUCCESS(s2n_stuffer_growable_alloc(&in, 0));
EXPECT_SUCCESS(s2n_stuffer_growable_alloc(&out, 0));
EXPECT_SUCCESS(s2n_connection_set_io_stuffers(&in, &out, client_conn));
EXPECT_SUCCESS(s2n_connection_set_io_stuffers(&out, &in, server_conn));
EXPECT_SUCCESS(s2n_negotiate_test_server_and_client(server_conn, client_conn));
/* Initiate a partial send */
uint16_t partial_send_len = client_conn->max_outgoing_fragment_length / 2;
DEFER_CLEANUP(struct s2n_stuffer small_out = { 0 }, s2n_stuffer_free);
EXPECT_SUCCESS(s2n_stuffer_alloc(&small_out, partial_send_len));
EXPECT_SUCCESS(s2n_connection_set_send_io_stuffer(&small_out, client_conn));
EXPECT_FAILURE_WITH_ERRNO(s2n_send(client_conn, large_app_data, sizeof(large_app_data), &blocked),
S2N_ERR_IO_BLOCKED);
EXPECT_EQUAL(blocked, S2N_BLOCKED_ON_WRITE);
EXPECT_FAILURE_WITH_ERRNO(s2n_renegotiate_wipe(client_conn), S2N_ERR_INVALID_STATE);
/* Finish the send */
EXPECT_SUCCESS(s2n_connection_set_send_io_stuffer(&out, client_conn));
EXPECT_EQUAL(s2n_send(client_conn, large_app_data, sizeof(large_app_data), &blocked), sizeof(large_app_data));
EXPECT_SUCCESS(s2n_renegotiate_wipe(client_conn));
};
/* Wipe mid-read not allowed */
{
DEFER_CLEANUP(struct s2n_connection *server_conn = s2n_connection_new(S2N_SERVER), s2n_connection_ptr_free);
EXPECT_NOT_NULL(server_conn);
EXPECT_SUCCESS(s2n_connection_set_config(server_conn, config));
DEFER_CLEANUP(struct s2n_connection *client_conn = s2n_connection_new(S2N_CLIENT), s2n_connection_ptr_free);
EXPECT_NOT_NULL(client_conn);
EXPECT_SUCCESS(s2n_connection_set_config(client_conn, config));
DEFER_CLEANUP(struct s2n_stuffer in = { 0 }, s2n_stuffer_free);
DEFER_CLEANUP(struct s2n_stuffer out = { 0 }, s2n_stuffer_free);
EXPECT_SUCCESS(s2n_stuffer_growable_alloc(&in, 0));
EXPECT_SUCCESS(s2n_stuffer_growable_alloc(&out, 0));
EXPECT_SUCCESS(s2n_connection_set_io_stuffers(&in, &out, client_conn));
EXPECT_SUCCESS(s2n_connection_set_io_stuffers(&out, &in, server_conn));
EXPECT_SUCCESS(s2n_negotiate_test_server_and_client(server_conn, client_conn));
/* Initiate a partial recv */
uint16_t partial_recv_len = sizeof(app_data) / 2;
uint8_t recv_buffer[S2N_TLS_MAXIMUM_FRAGMENT_LENGTH] = { 0 };
EXPECT_EQUAL(s2n_send(server_conn, app_data, sizeof(app_data), &blocked), sizeof(app_data));
EXPECT_EQUAL(s2n_recv(client_conn, recv_buffer, partial_recv_len, &blocked), partial_recv_len);
EXPECT_BYTEARRAY_EQUAL(app_data, recv_buffer, partial_recv_len);
EXPECT_TRUE(s2n_peek(client_conn) > 0);
EXPECT_FAILURE_WITH_ERRNO(s2n_renegotiate_wipe(client_conn), S2N_ERR_INVALID_STATE);
/* Finish the recv */
size_t remaining_recv_len = sizeof(app_data) - partial_recv_len;
EXPECT_EQUAL(s2n_recv(client_conn, recv_buffer, remaining_recv_len, &blocked), remaining_recv_len);
EXPECT_BYTEARRAY_EQUAL(app_data + partial_recv_len, recv_buffer, remaining_recv_len);
EXPECT_EQUAL(s2n_peek(client_conn), 0);
EXPECT_SUCCESS(s2n_renegotiate_wipe(client_conn));
};
/* Wipe with next record buffered allowed, and data preserved */
{
DEFER_CLEANUP(struct s2n_connection *server = s2n_connection_new(S2N_SERVER), s2n_connection_ptr_free);
EXPECT_NOT_NULL(server);
EXPECT_SUCCESS(s2n_connection_set_config(server, config));
DEFER_CLEANUP(struct s2n_connection *client = s2n_connection_new(S2N_CLIENT), s2n_connection_ptr_free);
EXPECT_NOT_NULL(client);
EXPECT_SUCCESS(s2n_connection_set_config(client, config));
EXPECT_SUCCESS(s2n_connection_set_recv_buffering(client, true));
DEFER_CLEANUP(struct s2n_test_io_stuffer_pair io_pair = { 0 }, s2n_io_stuffer_pair_free);
EXPECT_OK(s2n_io_stuffer_pair_init(&io_pair));
EXPECT_OK(s2n_connections_set_io_stuffer_pair(client, server, &io_pair));
EXPECT_SUCCESS(s2n_negotiate_test_server_and_client(server, client));
/* Write two records, but only receive one.
* Due to recv buffering, the second record will be read and buffered
* at the same time as the first record, but not processed yet.
*/
uint8_t recv_buffer[sizeof(app_data)] = { 0 };
EXPECT_EQUAL(s2n_send(server, app_data, sizeof(app_data), &blocked), sizeof(app_data));
EXPECT_EQUAL(s2n_send(server, app_data, sizeof(app_data), &blocked), sizeof(app_data));
EXPECT_EQUAL(s2n_recv(client, recv_buffer, sizeof(app_data), &blocked), sizeof(app_data));
EXPECT_EQUAL(s2n_peek(client), 0);
EXPECT_TRUE(s2n_stuffer_data_available(&client->buffer_in));
EXPECT_SUCCESS(s2n_renegotiate_wipe(client));
/* The second record is still available to read after the wipe */
EXPECT_EQUAL(s2n_recv(client, recv_buffer, sizeof(app_data), &blocked), sizeof(app_data));
EXPECT_BYTEARRAY_EQUAL(recv_buffer, app_data, sizeof(app_data));
};
};
/* Test the basic renegotiation mechanism with a variety of connection parameters.
* A client should always be able to receive and negotiate after wiping a connection for renegotiation.
*/
{
/* Setup a security policy that only contains one cipher */
struct s2n_cipher_preferences one_cipher_preference = { .count = 1, .suites = NULL };
struct s2n_security_policy one_cipher_policy = security_policy_test_all;
one_cipher_policy.cipher_preferences = &one_cipher_preference;
/* This config can only be used for servers, because currently only servers can have multiple certs */
DEFER_CLEANUP(struct s2n_config *server_config = s2n_config_new(), s2n_config_ptr_free);
EXPECT_NOT_NULL(server_config);
EXPECT_SUCCESS(s2n_config_add_cert_chain_and_key_to_store(server_config, chain_and_key));
EXPECT_SUCCESS(s2n_config_add_cert_chain_and_key_to_store(server_config, ecdsa_chain_and_key));
EXPECT_SUCCESS(s2n_config_add_dhparams(server_config, dh_params));
EXPECT_SUCCESS(s2n_config_accept_max_fragment_length(server_config));
server_config->security_policy = &one_cipher_policy;
/* Setting the max fragment length will require modifying the client config */
DEFER_CLEANUP(struct s2n_config *client_config = s2n_config_new(), s2n_config_ptr_free);
EXPECT_NOT_NULL(client_config);
EXPECT_SUCCESS(s2n_config_set_unsafe_for_testing(client_config));
EXPECT_SUCCESS(s2n_config_set_cipher_preferences(client_config, "test_all"));
/* The oldest version s2n-tls supports is SSLv3.
* However, SSLv3 requires MD5 for its PRF.
*/
uint8_t oldest_tested_version = S2N_SSLv3;
if (!s2n_hash_is_available(S2N_HASH_MD5)) {
oldest_tested_version = S2N_TLS10;
}
struct s2n_reneg_test_case test_cases[2000] = { 0 };
size_t test_cases_count = 0;
/* FFDHE is very, VERY slow.
* To avoid this test taking multiple minutes,
* we choose a limited number of dhe test cases.
*/
for (size_t i = 0; i < s2n_array_len(dhe_test_cases); i++) {
if (!dhe_test_cases[i].cipher_suite->available) {
continue;
}
if (dhe_test_cases[i].protocol_version < oldest_tested_version) {
continue;
}
test_cases[test_cases_count] = dhe_test_cases[i];
test_cases_count++;
EXPECT_TRUE(test_cases_count < s2n_array_len(test_cases));
}
EXPECT_TRUE(test_cases_count > 0);
const struct s2n_cipher_preferences *ciphers = security_policy_test_all.cipher_preferences;
for (uint8_t version = oldest_tested_version; version < S2N_TLS13; version++) {
for (size_t cipher_i = 0; cipher_i < ciphers->count; cipher_i++) {
struct s2n_cipher_suite *cipher = ciphers->suites[cipher_i];
if (!cipher->available) {
continue;
}
if (version < cipher->minimum_required_tls_version) {
continue;
}
if (cipher->key_exchange_alg == &s2n_dhe) {
/* See dhe_test_cases */
continue;
}
for (size_t max_frag_i = 0; max_frag_i < s2n_array_len(mfl_code_to_length); max_frag_i++) {
test_cases[test_cases_count] = (struct s2n_reneg_test_case){
.protocol_version = version,
.cipher_suite = ciphers->suites[cipher_i],
.max_frag_code = max_frag_i,
};
test_cases_count++;
EXPECT_TRUE(test_cases_count < s2n_array_len(test_cases));
}
}
}
for (size_t i = 0; i < test_cases_count; i++) {
uint8_t recv_buffer[sizeof(app_data)] = { 0 };
DEFER_CLEANUP(struct s2n_connection *server_conn = s2n_connection_new(S2N_SERVER), s2n_connection_ptr_free);
EXPECT_NOT_NULL(server_conn);
EXPECT_SUCCESS(s2n_connection_set_config(server_conn, server_config));
DEFER_CLEANUP(struct s2n_connection *client_conn = s2n_connection_new(S2N_CLIENT), s2n_connection_ptr_free);
EXPECT_NOT_NULL(client_conn);
EXPECT_SUCCESS(s2n_connection_set_config(client_conn, client_config));
DEFER_CLEANUP(struct s2n_test_io_pair io_pair = { 0 }, s2n_io_pair_close);
EXPECT_SUCCESS(s2n_io_pair_init_non_blocking(&io_pair));
EXPECT_SUCCESS(s2n_connection_set_io_pair(client_conn, &io_pair));
EXPECT_SUCCESS(s2n_connection_set_io_pair(server_conn, &io_pair));
/* Setup test case */
server_conn->server_protocol_version = test_cases[i].protocol_version;
EXPECT_SUCCESS(s2n_config_send_max_fragment_length(client_config, test_cases[i].max_frag_code));
one_cipher_preference.suites = &test_cases[i].cipher_suite;
EXPECT_SUCCESS(s2n_negotiate_test_server_and_client(server_conn, client_conn));
/* Verify test case setup */
EXPECT_EQUAL(client_conn->actual_protocol_version, test_cases[i].protocol_version);
EXPECT_EQUAL(client_conn->max_outgoing_fragment_length, mfl_code_to_length[test_cases[i].max_frag_code]);
if (test_cases[i].protocol_version > S2N_SSLv3) {
EXPECT_EQUAL(client_conn->secure->cipher_suite, test_cases[i].cipher_suite);
} else {
EXPECT_EQUAL(client_conn->secure->cipher_suite, test_cases[i].cipher_suite->sslv3_cipher_suite);
}
EXPECT_SUCCESS(s2n_renegotiate_wipe(client_conn));
/* Test that the client can still receive application data */
EXPECT_EQUAL(s2n_send(server_conn, app_data, sizeof(app_data), &blocked), sizeof(app_data));
EXPECT_EQUAL(s2n_recv(client_conn, recv_buffer, sizeof(recv_buffer), &blocked), sizeof(app_data));
EXPECT_BYTEARRAY_EQUAL(recv_buffer, app_data, sizeof(app_data));
/* Test that a second handshake can occur. */
EXPECT_SUCCESS(s2n_renegotiate_wipe(server_conn));
EXPECT_SUCCESS(s2n_negotiate_test_server_and_client(server_conn, client_conn));
}
};
END_TEST();
}
|
