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
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
|
/*
* 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 "api/s2n.h"
#include "crypto/s2n_crypto.h"
#include "crypto/s2n_openssl_x509.h"
#include "s2n_test.h"
#include "testlib/s2n_testlib.h"
#include "tls/s2n_tls.h"
#include "utils/s2n_safety.h"
#define S2N_DEFAULT_TEST_CERT_CHAIN_LENGTH 3
#define S2N_CERT_DER_SIZE 2048
#define S2N_RSA_2048_SHA256_INTERMEDIATE_CA_KEY "../pems/rsa_2048_sha256_intermediate_ca_key.pem"
#define S2N_RSA_2048_SHA256_INTERMEDIATE_CERT_CUSTOM_OID "../pems/rsa_2048_sha256_intermediate_cert_custom_oid.pem"
#define ext_value_MAX_LEN UINT16_MAX
#define OFFSET_INSUFFICIENT_MEM_SIZE 3
DEFINE_POINTER_CLEANUP_FUNC(X509_NAME *, X509_NAME_free);
struct host_verify_data {
bool callback_invoked;
bool allow;
};
static uint8_t verify_host_fn(const char *host_name, size_t host_name_len, void *data)
{
struct host_verify_data *verify_data = (struct host_verify_data *) data;
verify_data->callback_invoked = 1;
return verify_data->allow;
}
static uint8_t always_verify_host_fn(const char *host_name, size_t host_name_len, void *data)
{
return true;
}
static int s2n_noop_async_pkey_fn(struct s2n_connection *conn, struct s2n_async_pkey_op *op)
{
return S2N_SUCCESS;
}
static S2N_RESULT s2n_compare_cert_chain(struct s2n_connection *conn, struct s2n_cert_chain_and_key *test_peer_chain)
{
RESULT_ENSURE_REF(conn);
RESULT_ENSURE_REF(test_peer_chain);
uint32_t cert_chain_length = 0;
RESULT_GUARD_POSIX(s2n_cert_chain_get_length(test_peer_chain, &cert_chain_length));
DEFER_CLEANUP(STACK_OF(X509) *cert_chain_validated = X509_STORE_CTX_get1_chain(conn->x509_validator.store_ctx),
s2n_openssl_x509_stack_pop_free);
RESULT_ENSURE_REF(cert_chain_validated);
RESULT_ENSURE_EQ(cert_chain_length, sk_X509_num(cert_chain_validated));
struct s2n_cert *cur_cert = NULL;
for (size_t cert_idx = 0; cert_idx < cert_chain_length; cert_idx++) {
X509 *cert = sk_X509_value(cert_chain_validated, cert_idx);
RESULT_ENSURE_REF(cert);
DEFER_CLEANUP(uint8_t *cert_data_from_validator = NULL, s2n_crypto_free);
int cert_size_from_validator = i2d_X509(cert, &cert_data_from_validator);
RESULT_ENSURE_REF(cert_data_from_validator);
RESULT_ENSURE_GT(cert_size_from_validator, 0);
RESULT_GUARD_POSIX(s2n_cert_chain_get_cert(test_peer_chain, &cur_cert, cert_idx));
RESULT_ENSURE_REF(cur_cert);
RESULT_ENSURE_EQ(cert_size_from_validator, cur_cert->raw.size);
RESULT_ENSURE_EQ(memcmp(cert_data_from_validator, cur_cert->raw.data, cur_cert->raw.size), 0);
}
return S2N_RESULT_OK;
}
static S2N_RESULT s2n_compare_utf8_strings(struct s2n_blob *input_der, const char *expected_utf8_str, uint32_t utf8_len_in, uint32_t expected_utf8_len)
{
RESULT_ENSURE_REF(input_der);
RESULT_ENSURE_REF(expected_utf8_str);
RESULT_ENSURE_GT(expected_utf8_len, 0);
DEFER_CLEANUP(struct s2n_blob utf8_str = { 0 }, s2n_free);
RESULT_GUARD_POSIX(s2n_alloc(&utf8_str, utf8_len_in));
RESULT_GUARD_POSIX(s2n_cert_get_utf8_string_from_extension_data(input_der->data, input_der->size, utf8_str.data, &utf8_str.size));
RESULT_ENSURE_EQ(utf8_str.size, expected_utf8_len);
RESULT_ENSURE_EQ(memcmp(utf8_str.data, expected_utf8_str, utf8_str.size), 0);
RESULT_GUARD_POSIX(s2n_free(&utf8_str));
return S2N_RESULT_OK;
}
int main(int argc, char **argv)
{
BEGIN_TEST();
const uint8_t ocsp_data[] = "ocsp data";
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));
/* Test s2n_cert_chain_and_key_new */
{
DEFER_CLEANUP(struct s2n_cert_chain_and_key *chain = s2n_cert_chain_and_key_new(),
s2n_cert_chain_and_key_ptr_free);
EXPECT_NOT_NULL(chain);
/* Sanity check some fields */
EXPECT_NOT_NULL(chain->cert_chain);
EXPECT_NOT_NULL(chain->private_key);
EXPECT_NOT_NULL(chain->cn_names);
EXPECT_NOT_NULL(chain->san_names);
EXPECT_EQUAL(chain->cert_chain->chain_size, 0);
EXPECT_NULL(chain->cert_chain->head);
EXPECT_NULL(chain->private_key->pkey);
EXPECT_NULL(chain->private_key->sign);
EXPECT_NULL(chain->context);
};
/* Test s2n_cert_chain_and_key_load_public_pem_bytes */
{
uint32_t pem_len = 0;
uint8_t pem[S2N_CERT_DER_SIZE] = { 0 };
EXPECT_SUCCESS(s2n_read_test_pem_and_len(S2N_DEFAULT_ECDSA_TEST_CERT_CHAIN, pem, &pem_len, sizeof(pem)));
/* Load only a public certificate */
struct s2n_cert_chain_and_key *cert_only_chain = s2n_cert_chain_and_key_new();
EXPECT_NOT_NULL(cert_only_chain);
EXPECT_SUCCESS(s2n_cert_chain_and_key_load_public_pem_bytes(cert_only_chain, pem, pem_len));
EXPECT_FAILURE(s2n_pkey_check_key_exists(cert_only_chain->private_key));
/* Add cert chain to config */
struct s2n_config *config = s2n_config_new();
EXPECT_FALSE(config->no_signing_key);
EXPECT_SUCCESS(s2n_config_add_cert_chain_and_key_to_store(config, cert_only_chain));
EXPECT_TRUE(config->no_signing_key);
/* Add config to connection */
struct s2n_connection *conn = s2n_connection_new(S2N_CLIENT);
EXPECT_FAILURE_WITH_ERRNO(s2n_connection_set_config(conn, config), S2N_ERR_NO_PRIVATE_KEY);
EXPECT_SUCCESS(s2n_config_set_async_pkey_callback(config, s2n_noop_async_pkey_fn));
EXPECT_SUCCESS(s2n_connection_set_config(conn, config));
EXPECT_SUCCESS(s2n_connection_free(conn));
EXPECT_SUCCESS(s2n_config_free(config));
EXPECT_SUCCESS(s2n_cert_chain_and_key_free(cert_only_chain));
};
/* Test s2n_cert_chain_get_length */
{
uint32_t length = 0;
/* Safety checks */
{
EXPECT_FAILURE_WITH_ERRNO(s2n_cert_chain_get_length(NULL, &length), S2N_ERR_NULL);
EXPECT_FAILURE_WITH_ERRNO(s2n_cert_chain_get_length(chain_and_key, NULL), S2N_ERR_NULL);
};
/* Test success case */
EXPECT_SUCCESS(s2n_cert_chain_get_length(chain_and_key, &length));
EXPECT_EQUAL(length, S2N_DEFAULT_TEST_CERT_CHAIN_LENGTH);
};
/* Test s2n_cert_chain_get_cert */
{
struct s2n_cert *out_cert = NULL;
uint32_t cert_idx = 0;
/* Safety checks */
{
EXPECT_FAILURE_WITH_ERRNO(s2n_cert_chain_get_cert(NULL, &out_cert, cert_idx), S2N_ERR_NULL);
EXPECT_FAILURE_WITH_ERRNO(s2n_cert_chain_get_cert(chain_and_key, NULL, cert_idx), S2N_ERR_NULL);
};
struct s2n_cert *cur_cert = chain_and_key->cert_chain->head;
/* Test error case for invalid cert_idx, the valid range of cert_idx is 0 to cert_chain_length - 1 */
cert_idx = S2N_DEFAULT_TEST_CERT_CHAIN_LENGTH;
EXPECT_FAILURE_WITH_ERRNO(s2n_cert_chain_get_cert(chain_and_key, &out_cert, cert_idx), S2N_ERR_NO_CERT_FOUND);
/* Test success case */
for (size_t i = 0; i < S2N_DEFAULT_TEST_CERT_CHAIN_LENGTH; i++) {
EXPECT_SUCCESS(s2n_cert_chain_get_cert(chain_and_key, &out_cert, i));
EXPECT_NOT_NULL(cur_cert);
EXPECT_EQUAL(out_cert, cur_cert);
cur_cert = cur_cert->next;
}
};
/* Test s2n_cert_get_der */
{
struct s2n_cert *cert = chain_and_key->cert_chain->head;
const uint8_t *out_cert_der = NULL;
uint32_t cert_len = 0;
/* Safety checks */
{
EXPECT_FAILURE_WITH_ERRNO(s2n_cert_get_der(NULL, &out_cert_der, &cert_len), S2N_ERR_NULL);
EXPECT_FAILURE_WITH_ERRNO(s2n_cert_get_der(cert, NULL, &cert_len), S2N_ERR_NULL);
EXPECT_FAILURE_WITH_ERRNO(s2n_cert_get_der(cert, &out_cert_der, NULL), S2N_ERR_NULL);
};
EXPECT_SUCCESS(s2n_cert_get_der(cert, &out_cert_der, &cert_len));
EXPECT_EQUAL(cert_len, cert->raw.size);
EXPECT_BYTEARRAY_EQUAL(out_cert_der, cert->raw.data, cert_len);
};
/* Test s2n_connection_get_peer_cert_chain */
{
/* Setup connections */
struct s2n_connection *client_conn = NULL;
struct s2n_connection *server_conn = NULL;
EXPECT_NOT_NULL(client_conn = s2n_connection_new(S2N_CLIENT));
EXPECT_NOT_NULL(server_conn = s2n_connection_new(S2N_SERVER));
/* Create nonblocking pipes */
struct s2n_test_io_pair io_pair = { 0 };
EXPECT_SUCCESS(s2n_io_pair_init_non_blocking(&io_pair));
struct s2n_cert_chain_and_key *s2n_chain_and_key = NULL;
EXPECT_SUCCESS(s2n_test_cert_chain_and_key_new(&s2n_chain_and_key, S2N_DEFAULT_ECDSA_TEST_CERT_CHAIN,
S2N_DEFAULT_ECDSA_TEST_PRIVATE_KEY));
struct s2n_config *config_skip_x509_verification = s2n_config_new();
EXPECT_NOT_NULL(config_skip_x509_verification);
/* Skip x509 verification */
EXPECT_SUCCESS(s2n_config_disable_x509_verification(config_skip_x509_verification));
EXPECT_SUCCESS(s2n_config_set_check_stapled_ocsp_response(config_skip_x509_verification, 0));
EXPECT_SUCCESS(s2n_config_set_cipher_preferences(config_skip_x509_verification, "test_all"));
EXPECT_SUCCESS(s2n_config_set_client_auth_type(config_skip_x509_verification, S2N_CERT_AUTH_OPTIONAL));
struct host_verify_data verify_data = { .allow = 1, .callback_invoked = 0 };
EXPECT_SUCCESS(s2n_config_set_verify_host_callback(config_skip_x509_verification, verify_host_fn, &verify_data));
EXPECT_SUCCESS(s2n_config_set_verification_ca_location(config_skip_x509_verification, S2N_DEFAULT_ECDSA_TEST_CERT_CHAIN, NULL));
EXPECT_SUCCESS(s2n_config_add_cert_chain_and_key_to_store(config_skip_x509_verification, s2n_chain_and_key));
struct s2n_config *config_with_x509_verification = s2n_config_new();
EXPECT_NOT_NULL(config_with_x509_verification);
EXPECT_SUCCESS(s2n_config_set_cipher_preferences(config_with_x509_verification, "test_all"));
EXPECT_SUCCESS(s2n_config_set_client_auth_type(config_with_x509_verification, S2N_CERT_AUTH_REQUIRED));
EXPECT_SUCCESS(s2n_config_set_verify_host_callback(config_with_x509_verification, verify_host_fn, &verify_data));
EXPECT_SUCCESS(s2n_config_set_verification_ca_location(config_with_x509_verification, S2N_DEFAULT_ECDSA_TEST_CERT_CHAIN, NULL));
EXPECT_SUCCESS(s2n_config_add_cert_chain_and_key_to_store(config_with_x509_verification, s2n_chain_and_key));
EXPECT_SUCCESS(s2n_config_set_check_stapled_ocsp_response(config_with_x509_verification, false));
/* Test s2n_connection_get_peer_cert_chain failure cases with error codes */
{
EXPECT_SUCCESS(s2n_connection_set_config(client_conn, config_skip_x509_verification));
EXPECT_EQUAL(client_conn->x509_validator.skip_cert_validation, 1);
EXPECT_SUCCESS(s2n_connection_set_config(server_conn, config_with_x509_verification));
EXPECT_EQUAL(server_conn->x509_validator.skip_cert_validation, 0);
EXPECT_SUCCESS(s2n_connections_set_io_pair(client_conn, server_conn, &io_pair));
/* Negotiate handshake */
EXPECT_SUCCESS(s2n_negotiate_test_server_and_client(server_conn, client_conn));
EXPECT_EQUAL(server_conn->x509_validator.state, VALIDATED);
EXPECT_NOT_EQUAL(client_conn->x509_validator.state, VALIDATED);
/* Safety checks */
{
DEFER_CLEANUP(struct s2n_cert_chain_and_key *chain = s2n_cert_chain_and_key_new(),
s2n_cert_chain_and_key_ptr_free);
EXPECT_NOT_NULL(chain);
EXPECT_FAILURE_WITH_ERRNO(s2n_connection_get_peer_cert_chain(NULL, chain), S2N_ERR_NULL);
EXPECT_FAILURE_WITH_ERRNO(s2n_connection_get_peer_cert_chain(server_conn, NULL), S2N_ERR_NULL);
}
/* Input certificate chain is not empty */
{
DEFER_CLEANUP(struct s2n_cert_chain_and_key *input = NULL, s2n_cert_chain_and_key_ptr_free);
EXPECT_SUCCESS(s2n_test_cert_chain_and_key_new(&input,
S2N_DEFAULT_ECDSA_TEST_CERT_CHAIN, S2N_DEFAULT_ECDSA_TEST_PRIVATE_KEY));
EXPECT_FAILURE_WITH_ERRNO(s2n_connection_get_peer_cert_chain(server_conn, input),
S2N_ERR_INVALID_ARGUMENT);
/* Validate that the original cert chain was not modified */
EXPECT_NOT_NULL(input->cert_chain);
EXPECT_NOT_NULL(input->cert_chain->head);
EXPECT_EQUAL(input->cert_chain->head->pkey_type, S2N_PKEY_TYPE_ECDSA);
}
/* x509 verification is skipped on client side */
{
DEFER_CLEANUP(struct s2n_cert_chain_and_key *chain = s2n_cert_chain_and_key_new(),
s2n_cert_chain_and_key_ptr_free);
EXPECT_NOT_NULL(chain);
EXPECT_FAILURE_WITH_ERRNO(s2n_connection_get_peer_cert_chain(client_conn, chain),
S2N_ERR_CERT_NOT_VALIDATED);
}
EXPECT_SUCCESS(s2n_shutdown_test_server_and_client(server_conn, client_conn));
/* Clean-up */
EXPECT_SUCCESS(s2n_connection_wipe(client_conn));
EXPECT_SUCCESS(s2n_connection_wipe(server_conn));
};
/* Test s2n_connection_get_peer_cert_chain success on the server side */
{
EXPECT_SUCCESS(s2n_connection_set_config(client_conn, config_skip_x509_verification));
EXPECT_EQUAL(client_conn->x509_validator.skip_cert_validation, 1);
EXPECT_SUCCESS(s2n_connection_set_config(server_conn, config_with_x509_verification));
EXPECT_EQUAL(server_conn->x509_validator.skip_cert_validation, 0);
EXPECT_SUCCESS(s2n_connections_set_io_pair(client_conn, server_conn, &io_pair));
/* Negotiate handshake */
EXPECT_SUCCESS(s2n_negotiate_test_server_and_client(server_conn, client_conn));
EXPECT_EQUAL(server_conn->x509_validator.state, VALIDATED);
struct s2n_cert_chain_and_key *test_peer_chain = s2n_cert_chain_and_key_new();
EXPECT_NOT_NULL(test_peer_chain);
EXPECT_SUCCESS(s2n_connection_get_peer_cert_chain(server_conn, test_peer_chain));
EXPECT_OK(s2n_compare_cert_chain(server_conn, test_peer_chain));
EXPECT_SUCCESS(s2n_shutdown_test_server_and_client(server_conn, client_conn));
/* Clean-up */
EXPECT_SUCCESS(s2n_cert_chain_and_key_free(test_peer_chain));
EXPECT_SUCCESS(s2n_connection_wipe(client_conn));
EXPECT_SUCCESS(s2n_connection_wipe(server_conn));
};
/* Test s2n_connection_get_peer_cert_chain success on the client side */
{
EXPECT_SUCCESS(s2n_connection_set_config(server_conn, config_skip_x509_verification));
EXPECT_EQUAL(server_conn->x509_validator.skip_cert_validation, 1);
EXPECT_SUCCESS(s2n_connection_set_config(client_conn, config_with_x509_verification));
EXPECT_EQUAL(client_conn->x509_validator.skip_cert_validation, 0);
EXPECT_SUCCESS(s2n_connections_set_io_pair(client_conn, server_conn, &io_pair));
/* Negotiate handshake */
EXPECT_SUCCESS(s2n_negotiate_test_server_and_client(server_conn, client_conn));
EXPECT_EQUAL(client_conn->x509_validator.state, VALIDATED);
struct s2n_cert_chain_and_key *test_peer_chain = s2n_cert_chain_and_key_new();
EXPECT_NOT_NULL(test_peer_chain);
EXPECT_SUCCESS(s2n_connection_get_peer_cert_chain(client_conn, test_peer_chain));
EXPECT_OK(s2n_compare_cert_chain(client_conn, test_peer_chain));
EXPECT_SUCCESS(s2n_shutdown_test_server_and_client(server_conn, client_conn));
/* Clean-up */
EXPECT_SUCCESS(s2n_cert_chain_and_key_free(test_peer_chain));
EXPECT_SUCCESS(s2n_connection_wipe(client_conn));
EXPECT_SUCCESS(s2n_connection_wipe(server_conn));
};
/* Test s2n_connection_get_peer_cert_chain with OCSP */
if (s2n_x509_ocsp_stapling_supported()) {
EXPECT_SUCCESS(s2n_cert_chain_and_key_set_ocsp_data(s2n_chain_and_key,
ocsp_data, s2n_array_len(ocsp_data)));
EXPECT_SUCCESS(s2n_config_set_status_request_type(config_with_x509_verification, S2N_STATUS_REQUEST_OCSP));
EXPECT_SUCCESS(s2n_connection_set_config(server_conn, config_skip_x509_verification));
EXPECT_EQUAL(server_conn->x509_validator.skip_cert_validation, 1);
EXPECT_SUCCESS(s2n_connection_set_config(client_conn, config_with_x509_verification));
EXPECT_EQUAL(client_conn->x509_validator.skip_cert_validation, 0);
EXPECT_SUCCESS(s2n_connections_set_io_pair(client_conn, server_conn, &io_pair));
/* Negotiate handshake */
EXPECT_SUCCESS(s2n_negotiate_test_server_and_client(server_conn, client_conn));
EXPECT_EQUAL(client_conn->x509_validator.state, OCSP_VALIDATED);
struct s2n_cert_chain_and_key *test_peer_chain = s2n_cert_chain_and_key_new();
EXPECT_NOT_NULL(test_peer_chain);
EXPECT_SUCCESS(s2n_connection_get_peer_cert_chain(client_conn, test_peer_chain));
EXPECT_OK(s2n_compare_cert_chain(client_conn, test_peer_chain));
EXPECT_SUCCESS(s2n_shutdown_test_server_and_client(server_conn, client_conn));
/* Clean-up */
EXPECT_SUCCESS(s2n_cert_chain_and_key_free(test_peer_chain));
EXPECT_SUCCESS(s2n_connection_wipe(client_conn));
EXPECT_SUCCESS(s2n_connection_wipe(server_conn));
}
/* Clean-up */
EXPECT_SUCCESS(s2n_config_free(config_skip_x509_verification));
EXPECT_SUCCESS(s2n_config_free(config_with_x509_verification));
EXPECT_SUCCESS(s2n_connection_free(server_conn));
EXPECT_SUCCESS(s2n_connection_free(client_conn));
EXPECT_SUCCESS(s2n_io_pair_close(&io_pair));
EXPECT_SUCCESS(s2n_cert_chain_and_key_free(s2n_chain_and_key));
};
/* Test X509 Extension helper functions */
{
struct s2n_blob ext_value = { 0 };
struct s2n_blob utf8_str = { 0 };
bool critical = false;
size_t i = 0;
struct s2n_cert_chain_and_key *custom_cert_chain = NULL;
EXPECT_SUCCESS(s2n_test_cert_chain_and_key_new(&custom_cert_chain,
S2N_RSA_2048_SHA256_INTERMEDIATE_CERT_CUSTOM_OID,
S2N_RSA_2048_SHA256_INTERMEDIATE_CA_KEY));
struct s2n_cert *cert = custom_cert_chain->cert_chain->head;
EXPECT_NOT_NULL(cert);
S2N_BLOB_FROM_HEX(subject_key_id_blob, "04 14 F9 19 58 9D 9E 97 89 9C 27 67 5B 62 19 \
2A 1E 27 D6 4E 1E F6");
S2N_BLOB_FROM_HEX(authority_key_id_blob, "30 16 80 14 56 9E 26 B6 09 4C 2E AC C8 4E 51 \
E1 AD 7F E7 92 84 28 D4 3E");
S2N_BLOB_FROM_HEX(basic_constraints_blob, "30 06 01 01 FF 02 01 00");
S2N_BLOB_FROM_HEX(key_usage_blob, "03 02 01 86");
S2N_BLOB_FROM_HEX(custom_oid_1_blob, "0C 41 6B 65 79 69 64 3A 33 \
36 3A 36 31 3A 33 46 3A 31 42 3A 30 32 3A 43 37 \
3A 31 32 3A 32 42 3A 35 33 3A 30 41 3A 32 32 3A \
42 41 3A 35 38 3A 42 36 3A 41 38 3A 38 30 3A 31 \
39 3A 45 45 3A 35 31 3A 38 35");
S2N_BLOB_FROM_HEX(custom_oid_2_blob, "0C 18 49 50 20 41 64 64 72 65 73 73 3A 31 32 2E \
33 34 35 2E 36 37 2E 38 39 30");
S2N_BLOB_FROM_HEX(custom_oid_3_blob, "0C 28 44 4E 53 3A 31 32 2E 33 34 35 2E 36 37 2E \
38 39 30 2E 61 75 74 6F 2E 70 64 78 2E 65 63 32 \
2E 73 75 62 73 74 72 61 74 65");
struct {
const char *oid;
uint32_t ext_value_len;
const char *expected_utf8;
uint32_t utf8_len;
struct s2n_blob expected_der;
struct s2n_blob returned_der;
bool critical;
} test_cases[] = {
{ .oid = "X509v3 Subject Key Identifier",
.expected_der = subject_key_id_blob,
.critical = false },
{ .oid = "X509v3 Authority Key Identifier",
.expected_der = authority_key_id_blob,
.critical = false },
{ .oid = "X509v3 Basic Constraints",
.expected_der = basic_constraints_blob,
.critical = true },
{ .oid = "X509v3 Key Usage",
.expected_der = key_usage_blob,
.critical = true },
{ .oid = "1.2.3.4.5.6.7890.1.2.100.1",
.expected_utf8 = "keyid:36:61:3F:1B:02:C7:12:2B:53:0A:22:BA:58:B6:A8:80:19:EE:51:85",
.expected_der = custom_oid_1_blob,
.critical = false },
{ .oid = "1.2.3.4.5.6.7890.1.2.100.2",
.expected_utf8 = "IP Address:12.345.67.890",
.expected_der = custom_oid_2_blob,
.critical = false },
{ .oid = "1.2.3.4.5.6.7890.1.2.100.3",
.expected_utf8 = "DNS:12.345.67.890.auto.pdx.ec2.substrate",
.expected_der = custom_oid_3_blob,
.critical = false },
{ .oid = "1.2.3.4.5.6.7890.1.2.100",
.critical = false },
};
/* Test s2n_cert_get_x509_extension_value_length */
{
/* Safety checks */
{
const uint8_t oid[] = "Example X509 extension OID";
uint32_t ext_value_len = 0;
EXPECT_FAILURE_WITH_ERRNO(s2n_cert_get_x509_extension_value_length(NULL, oid, &ext_value_len), S2N_ERR_NULL);
EXPECT_FAILURE_WITH_ERRNO(s2n_cert_get_x509_extension_value_length(cert, NULL, &ext_value_len), S2N_ERR_NULL);
EXPECT_FAILURE_WITH_ERRNO(s2n_cert_get_x509_extension_value_length(cert, oid, NULL), S2N_ERR_NULL);
};
/* Test success cases */
for (i = 0; i < s2n_array_len(test_cases) - 1; i++) {
EXPECT_SUCCESS(s2n_cert_get_x509_extension_value_length(cert, (const uint8_t *) test_cases[i].oid, &test_cases[i].ext_value_len));
EXPECT_EQUAL(test_cases[i].ext_value_len, test_cases[i].expected_der.size);
}
/* Test failure case for invalid X509 extension OID */
{
size_t invalid_test_case = s2n_array_len(test_cases) - 1;
EXPECT_FAILURE_WITH_ERRNO(s2n_cert_get_x509_extension_value_length(cert, (const uint8_t *) test_cases[invalid_test_case].oid,
&test_cases[i].ext_value_len),
S2N_ERR_X509_EXTENSION_VALUE_NOT_FOUND);
};
};
/* Test s2n_cert_get_x509_extension_value */
{
/* Safety checks */
{
const uint8_t oid[] = "Example X509 extension OID";
EXPECT_SUCCESS(s2n_alloc(&ext_value, ext_value_MAX_LEN));
EXPECT_FAILURE_WITH_ERRNO(s2n_cert_get_x509_extension_value(NULL, oid,
ext_value.data, &ext_value.size, &critical),
S2N_ERR_NULL);
EXPECT_FAILURE_WITH_ERRNO(s2n_cert_get_x509_extension_value(cert, NULL,
ext_value.data, &ext_value.size, &critical),
S2N_ERR_NULL);
EXPECT_FAILURE_WITH_ERRNO(s2n_cert_get_x509_extension_value(cert, oid,
NULL, &ext_value.size, &critical),
S2N_ERR_NULL);
EXPECT_FAILURE_WITH_ERRNO(s2n_cert_get_x509_extension_value(cert, oid,
ext_value.data, NULL, &critical),
S2N_ERR_NULL);
EXPECT_FAILURE_WITH_ERRNO(s2n_cert_get_x509_extension_value(cert, oid,
ext_value.data, &ext_value.size, NULL),
S2N_ERR_NULL);
EXPECT_SUCCESS(s2n_free(&ext_value));
};
/* Test success cases for s2n_cert_get_x509_extension_value */
for (i = 0; i < s2n_array_len(test_cases) - 1; i++) {
EXPECT_SUCCESS(s2n_alloc(&test_cases[i].returned_der, test_cases[i].ext_value_len));
EXPECT_SUCCESS(s2n_cert_get_x509_extension_value(cert, (const uint8_t *) test_cases[i].oid,
test_cases[i].returned_der.data,
&test_cases[i].returned_der.size, &critical));
EXPECT_BYTEARRAY_EQUAL(test_cases[i].returned_der.data, test_cases[i].expected_der.data, test_cases[i].expected_der.size);
EXPECT_EQUAL(critical, test_cases[i].critical);
}
/* Test failure case for insufficient amount of memory allocated */
{
size_t insuf_test_case = 0;
EXPECT_SUCCESS(s2n_alloc(&ext_value, test_cases[insuf_test_case].returned_der.size - OFFSET_INSUFFICIENT_MEM_SIZE));
EXPECT_FAILURE_WITH_ERRNO(s2n_cert_get_x509_extension_value(cert, (const uint8_t *) test_cases[insuf_test_case].oid,
ext_value.data, &ext_value.size, &critical),
S2N_ERR_INSUFFICIENT_MEM_SIZE);
EXPECT_SUCCESS(s2n_free(&ext_value));
};
/* Test failure case for invalid X509 extension OID */
{
size_t invalid_test_case = s2n_array_len(test_cases) - 1;
EXPECT_SUCCESS(s2n_alloc(&test_cases[invalid_test_case].returned_der, ext_value_MAX_LEN));
EXPECT_FAILURE_WITH_ERRNO(s2n_cert_get_x509_extension_value(cert, (const uint8_t *) test_cases[invalid_test_case].oid,
test_cases[invalid_test_case].returned_der.data,
&test_cases[invalid_test_case].returned_der.size, &critical),
S2N_ERR_X509_EXTENSION_VALUE_NOT_FOUND);
};
};
/* Test s2n_cert_get_utf8_string_from_extension_data_length */
{
/* Safety checks */
{
const uint8_t der_ext_value[] = "DER encoded X509 extension value";
size_t der_ext_value_len = strlen((const char *) der_ext_value);
uint32_t utf8_len = 0;
EXPECT_FAILURE_WITH_ERRNO(s2n_cert_get_utf8_string_from_extension_data_length(NULL, der_ext_value_len, &utf8_len), S2N_ERR_NULL);
EXPECT_FAILURE_WITH_ERRNO(s2n_cert_get_utf8_string_from_extension_data_length(der_ext_value, 0, &utf8_len), S2N_ERR_SAFETY);
EXPECT_FAILURE_WITH_ERRNO(s2n_cert_get_utf8_string_from_extension_data_length(der_ext_value, der_ext_value_len, 0), S2N_ERR_NULL);
};
/* Test success and failure cases */
for (i = 0; i < s2n_array_len(test_cases) - 1; i++) {
if (i > 3) {
EXPECT_SUCCESS(s2n_cert_get_utf8_string_from_extension_data_length(test_cases[i].returned_der.data,
test_cases[i].returned_der.size,
&test_cases[i].utf8_len));
EXPECT_EQUAL(test_cases[i].utf8_len, strlen((const char *) test_cases[i].expected_utf8));
} else {
EXPECT_FAILURE_WITH_ERRNO(s2n_cert_get_utf8_string_from_extension_data_length(
test_cases[i].returned_der.data,
test_cases[i].returned_der.size,
&test_cases[i].utf8_len),
S2N_ERR_INVALID_X509_EXTENSION_TYPE);
}
}
/* Test failure case for insufficient amount of memory allocated */
{
size_t insuf_test_case = 4;
EXPECT_SUCCESS(s2n_alloc(&utf8_str, test_cases[insuf_test_case].returned_der.size - OFFSET_INSUFFICIENT_MEM_SIZE));
EXPECT_FAILURE_WITH_ERRNO(s2n_cert_get_utf8_string_from_extension_data(
test_cases[insuf_test_case].returned_der.data,
test_cases[insuf_test_case].returned_der.size,
utf8_str.data, &utf8_str.size),
S2N_ERR_INSUFFICIENT_MEM_SIZE);
EXPECT_SUCCESS(s2n_free(&utf8_str));
};
};
/* Test s2n_cert_get_utf8_string_from_extension_data */
{
/* Safety checks */
{
const uint8_t der_ext_value[] = "DER encoded X509 extension value";
size_t der_ext_value_len = strlen((const char *) der_ext_value);
EXPECT_SUCCESS(s2n_alloc(&utf8_str, ext_value_MAX_LEN));
EXPECT_FAILURE_WITH_ERRNO(s2n_cert_get_utf8_string_from_extension_data(NULL, der_ext_value_len, utf8_str.data,
&utf8_str.size),
S2N_ERR_NULL);
EXPECT_FAILURE_WITH_ERRNO(s2n_cert_get_utf8_string_from_extension_data(der_ext_value, 0, utf8_str.data,
&utf8_str.size),
S2N_ERR_SAFETY);
EXPECT_FAILURE_WITH_ERRNO(s2n_cert_get_utf8_string_from_extension_data(der_ext_value, der_ext_value_len, NULL,
&utf8_str.size),
S2N_ERR_NULL);
EXPECT_FAILURE_WITH_ERRNO(s2n_cert_get_utf8_string_from_extension_data(der_ext_value, der_ext_value_len,
utf8_str.data, NULL),
S2N_ERR_NULL);
EXPECT_SUCCESS(s2n_free(&utf8_str));
};
/* Test success and failure cases for s2n_cert_get_utf8_string_from_extension_data */
for (i = 0; i < s2n_array_len(test_cases) - 1; i++) {
if (i > 3) {
EXPECT_OK(s2n_compare_utf8_strings(&test_cases[i].returned_der, test_cases[i].expected_utf8,
test_cases[i].utf8_len, strlen((const char *) test_cases[i].expected_utf8)));
} else {
EXPECT_ERROR_WITH_ERRNO(s2n_compare_utf8_strings(
&test_cases[i].returned_der, (const char *) test_cases[i].expected_der.data, ext_value_MAX_LEN,
test_cases[i].expected_der.size),
S2N_ERR_INVALID_X509_EXTENSION_TYPE);
}
}
/* Test failure case for insufficient amount of memory allocated */
{
size_t insuf_test_case = 4;
EXPECT_SUCCESS(s2n_alloc(&utf8_str, test_cases[insuf_test_case].returned_der.size - OFFSET_INSUFFICIENT_MEM_SIZE));
EXPECT_FAILURE_WITH_ERRNO(s2n_cert_get_utf8_string_from_extension_data(
test_cases[insuf_test_case].returned_der.data,
test_cases[insuf_test_case].returned_der.size,
utf8_str.data, &utf8_str.size),
S2N_ERR_INSUFFICIENT_MEM_SIZE);
EXPECT_SUCCESS(s2n_free(&utf8_str));
};
};
/* Cleanup */
for (i = 0; i < s2n_array_len(test_cases); i++) {
EXPECT_SUCCESS(s2n_free(&test_cases[i].returned_der));
}
EXPECT_SUCCESS(s2n_cert_chain_and_key_free(custom_cert_chain));
};
/* Test s2n_connection_get_client_cert_chain */
{
DEFER_CLEANUP(struct s2n_config *config = s2n_config_new(), s2n_config_ptr_free);
EXPECT_SUCCESS(s2n_config_set_client_auth_type(config, S2N_CERT_AUTH_REQUIRED));
EXPECT_SUCCESS(s2n_config_set_verify_host_callback(config, always_verify_host_fn, NULL));
EXPECT_SUCCESS(s2n_config_add_cert_chain_and_key_to_store(config, ecdsa_chain_and_key));
EXPECT_SUCCESS(s2n_config_set_verification_ca_location(config, S2N_DEFAULT_ECDSA_TEST_CERT_CHAIN, NULL));
DEFER_CLEANUP(struct s2n_connection *tls12_client_conn = s2n_connection_new(S2N_CLIENT), s2n_connection_ptr_free);
DEFER_CLEANUP(struct s2n_connection *tls12_server_conn = s2n_connection_new(S2N_SERVER), s2n_connection_ptr_free);
DEFER_CLEANUP(struct s2n_connection *tls13_client_conn = s2n_connection_new(S2N_CLIENT), s2n_connection_ptr_free);
DEFER_CLEANUP(struct s2n_connection *tls13_server_conn = s2n_connection_new(S2N_SERVER), s2n_connection_ptr_free);
/* Should error before the handshake is performed.
* This method is intended to be called after the handshake is complete and requires
* state set during the handshake.
*/
{
uint8_t *output = NULL;
uint32_t output_len = 0;
EXPECT_FAILURE_WITH_ERRNO(s2n_connection_get_client_cert_chain(tls12_server_conn, &output, &output_len),
S2N_ERR_NULL);
EXPECT_FAILURE_WITH_ERRNO(s2n_connection_get_client_cert_chain(tls13_server_conn, &output, &output_len),
S2N_ERR_NULL);
EXPECT_NULL(output);
EXPECT_EQUAL(output_len, 0);
};
/* Perform TLS1.2 handshake and verify cert chain is available */
{
EXPECT_SUCCESS(s2n_connection_set_config(tls12_client_conn, config));
EXPECT_SUCCESS(s2n_connection_set_config(tls12_server_conn, config));
EXPECT_SUCCESS(s2n_connection_set_cipher_preferences(tls12_client_conn, "test_all_tls12"));
EXPECT_SUCCESS(s2n_connection_set_cipher_preferences(tls12_server_conn, "test_all_tls12"));
struct s2n_test_io_pair io_pair = { 0 };
EXPECT_SUCCESS(s2n_io_pair_init_non_blocking(&io_pair));
EXPECT_SUCCESS(s2n_connections_set_io_pair(tls12_client_conn, tls12_server_conn, &io_pair));
EXPECT_SUCCESS(s2n_negotiate_test_server_and_client(tls12_server_conn, tls12_client_conn));
EXPECT_EQUAL(tls12_server_conn->actual_protocol_version, S2N_TLS12);
EXPECT_NOT_NULL(tls12_server_conn->handshake_params.client_cert_chain.data);
EXPECT_NOT_EQUAL(tls12_server_conn->handshake_params.client_cert_chain.size, 0);
};
/* Perform TLS1.3 handshake and verify cert chain is available.
*
* The TLS1.3 handshake is only possible if TLS1.3 is fully supported because of client auth:
* the server doesn't know whether the client will offer a RSA-PSS certificate or not.
*/
if (s2n_is_tls13_fully_supported()) {
EXPECT_SUCCESS(s2n_connection_set_config(tls13_client_conn, config));
EXPECT_SUCCESS(s2n_connection_set_config(tls13_server_conn, config));
EXPECT_SUCCESS(s2n_connection_set_cipher_preferences(tls13_client_conn, "default_tls13"));
EXPECT_SUCCESS(s2n_connection_set_cipher_preferences(tls13_server_conn, "default_tls13"));
struct s2n_test_io_pair io_pair = { 0 };
EXPECT_SUCCESS(s2n_io_pair_init_non_blocking(&io_pair));
EXPECT_SUCCESS(s2n_connections_set_io_pair(tls13_client_conn, tls13_server_conn, &io_pair));
EXPECT_SUCCESS(s2n_negotiate_test_server_and_client(tls13_server_conn, tls13_client_conn));
EXPECT_EQUAL(tls13_server_conn->actual_protocol_version, S2N_TLS13);
EXPECT_NOT_NULL(tls13_server_conn->handshake_params.client_cert_chain.data);
EXPECT_NOT_EQUAL(tls13_server_conn->handshake_params.client_cert_chain.size, 0);
};
/* Should error if called by client */
{
uint8_t *output = NULL;
uint32_t output_len = 0;
EXPECT_FAILURE_WITH_ERRNO(s2n_connection_get_client_cert_chain(tls12_client_conn, &output, &output_len),
S2N_ERR_NULL);
EXPECT_FAILURE_WITH_ERRNO(s2n_connection_get_client_cert_chain(tls13_client_conn, &output, &output_len),
S2N_ERR_NULL);
EXPECT_NULL(output);
EXPECT_EQUAL(output_len, 0);
};
/* Should produce same result for TLS1.2 and TLS1.3
* (Both connections used the same certificate chain for the handshake)
*/
if (s2n_is_tls13_fully_supported()) {
uint8_t *tls12_output = NULL;
uint32_t tls12_output_len = 0;
EXPECT_SUCCESS(s2n_connection_get_client_cert_chain(tls12_server_conn, &tls12_output, &tls12_output_len));
uint8_t *tls13_output = NULL;
uint32_t tls13_output_len = 0;
EXPECT_SUCCESS(s2n_connection_get_client_cert_chain(tls13_server_conn, &tls13_output, &tls13_output_len));
EXPECT_EQUAL(tls12_output_len, tls13_output_len);
EXPECT_BYTEARRAY_EQUAL(tls12_output, tls13_output, tls13_output_len);
};
/* Test: Certificate that skips validation still available */
{
DEFER_CLEANUP(struct s2n_config *unsafe_config = s2n_config_new(),
s2n_config_ptr_free);
EXPECT_SUCCESS(s2n_config_set_client_auth_type(unsafe_config, S2N_CERT_AUTH_REQUIRED));
EXPECT_SUCCESS(s2n_config_add_cert_chain_and_key_to_store(unsafe_config, chain_and_key));
/* Disable certificate verification */
EXPECT_SUCCESS(s2n_config_disable_x509_verification(unsafe_config));
DEFER_CLEANUP(struct s2n_connection *client = s2n_connection_new(S2N_CLIENT),
s2n_connection_ptr_free);
EXPECT_SUCCESS(s2n_connection_set_config(client, unsafe_config));
DEFER_CLEANUP(struct s2n_connection *server = s2n_connection_new(S2N_SERVER),
s2n_connection_ptr_free);
EXPECT_SUCCESS(s2n_connection_set_config(server, unsafe_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, server, &io_pair));
EXPECT_SUCCESS(s2n_negotiate_test_server_and_client(server, client));
EXPECT_NOT_EQUAL(server->handshake_params.client_cert_chain.size, 0);
EXPECT_NOT_NULL(server->handshake_params.client_cert_chain.data);
};
/* Test: Certificate that fails validation still available */
{
DEFER_CLEANUP(struct s2n_config *client_config = s2n_config_new(),
s2n_config_ptr_free);
EXPECT_SUCCESS(s2n_config_set_client_auth_type(client_config, S2N_CERT_AUTH_REQUIRED));
EXPECT_SUCCESS(s2n_config_set_verify_host_callback(client_config, always_verify_host_fn, NULL));
EXPECT_SUCCESS(s2n_config_add_cert_chain_and_key_to_store(client_config, chain_and_key));
DEFER_CLEANUP(struct s2n_config *server_config = s2n_config_new(),
s2n_config_ptr_free);
EXPECT_SUCCESS(s2n_config_set_client_auth_type(server_config, S2N_CERT_AUTH_REQUIRED));
EXPECT_SUCCESS(s2n_config_set_verify_host_callback(server_config, always_verify_host_fn, NULL));
EXPECT_SUCCESS(s2n_config_add_cert_chain_and_key_to_store(server_config, chain_and_key));
/* Disable client verification of the server cert.
* Do not disable server verification of the client cert, but also
* don't provide any trust store to successfully perform the verification.
*/
EXPECT_SUCCESS(s2n_config_disable_x509_verification(client_config));
DEFER_CLEANUP(struct s2n_connection *client = s2n_connection_new(S2N_CLIENT),
s2n_connection_ptr_free);
EXPECT_SUCCESS(s2n_connection_set_blinding(client, S2N_SELF_SERVICE_BLINDING));
EXPECT_SUCCESS(s2n_connection_set_config(client, client_config));
DEFER_CLEANUP(struct s2n_connection *server = s2n_connection_new(S2N_SERVER),
s2n_connection_ptr_free);
EXPECT_SUCCESS(s2n_connection_set_blinding(server, S2N_SELF_SERVICE_BLINDING));
EXPECT_SUCCESS(s2n_connection_set_config(server, server_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, server, &io_pair));
EXPECT_FAILURE_WITH_ERRNO(s2n_negotiate_test_server_and_client(server, client),
S2N_ERR_CERT_UNTRUSTED);
/* Both the client and server could produce S2N_ERR_CERT_UNTRUSTED.
* Verify that only the server encountered an error and therefore only
* the server closed the connection.
*/
EXPECT_TRUE(s2n_connection_check_io_status(server, S2N_IO_CLOSED));
EXPECT_FALSE(s2n_connection_check_io_status(client, S2N_IO_CLOSED));
EXPECT_NOT_EQUAL(server->handshake_params.client_cert_chain.size, 0);
EXPECT_NOT_NULL(server->handshake_params.client_cert_chain.data);
};
/* Test: Certificate that fails parsing is still available in TLS1.2 */
{
DEFER_CLEANUP(struct s2n_stuffer input, s2n_stuffer_free);
EXPECT_SUCCESS(s2n_stuffer_growable_alloc(&input, 0));
/* Generate a completely malformed certificate chain, with no
* properly formed certificates.
*
* We don't parse pre-TLS1.3 chains before storing them, so don't
* care whether or not they're malformed.
*/
const uint32_t chain_size = 24;
EXPECT_SUCCESS(s2n_stuffer_write_uint24(&input, chain_size));
EXPECT_SUCCESS(s2n_stuffer_skip_write(&input, chain_size));
DEFER_CLEANUP(struct s2n_connection *server = s2n_connection_new(S2N_SERVER),
s2n_connection_ptr_free);
server->actual_protocol_version = S2N_TLS12;
EXPECT_SUCCESS(s2n_stuffer_copy(&input, &server->handshake.io,
s2n_stuffer_data_available(&input)));
EXPECT_FAILURE_WITH_ERRNO(s2n_client_cert_recv(server), S2N_ERR_CERT_INVALID);
EXPECT_NOT_EQUAL(server->handshake_params.client_cert_chain.size, 0);
EXPECT_NOT_NULL(server->handshake_params.client_cert_chain.data);
};
/* Test: Certificate that fails parsing is not available in TLS1.3 */
{
DEFER_CLEANUP(struct s2n_stuffer input, s2n_stuffer_free);
EXPECT_SUCCESS(s2n_stuffer_growable_alloc(&input, 0));
/* Since it's TLS1.3, we also need a zero-length request context */
EXPECT_SUCCESS(s2n_stuffer_write_uint8(&input, 0));
/* Generate a well-formed certificate chain.
*
* Unlike in TLS1.2, in TLS1.3 we must parse chains before storing
* them to remove the per-certificate TLS extension lists. Chains
* we cannot parse should not be stored.
*
* We could generate a completely invalid chain to test this case,
* like we do for TLS1.2. However, we want to ensure that a partially
* parsed chain is not partially stored. To do that, we need to
* generated a partially correct chain.
*
* We start with a completely parseable chain and then modify it
* to create a malformed chain.
*/
struct s2n_stuffer_reservation total_size = { 0 };
const uint32_t cert_size = 24, extensions_size = 20;
EXPECT_SUCCESS(s2n_stuffer_reserve_uint24(&input, &total_size));
EXPECT_SUCCESS(s2n_stuffer_write_uint24(&input, cert_size));
EXPECT_SUCCESS(s2n_stuffer_skip_write(&input, cert_size));
EXPECT_SUCCESS(s2n_stuffer_write_uint16(&input, extensions_size));
EXPECT_SUCCESS(s2n_stuffer_skip_write(&input, extensions_size));
EXPECT_SUCCESS(s2n_stuffer_write_uint24(&input, cert_size));
EXPECT_SUCCESS(s2n_stuffer_skip_write(&input, cert_size));
EXPECT_SUCCESS(s2n_stuffer_write_uint16(&input, extensions_size));
EXPECT_SUCCESS(s2n_stuffer_skip_write(&input, extensions_size));
EXPECT_SUCCESS(s2n_stuffer_write_vector_size(&total_size));
/* Validate that the certificate chain we generated is parseable.
* The chain will still ultimately fail validation, but it will be
* parsed and stored on the connection.
*/
{
DEFER_CLEANUP(struct s2n_connection *server = s2n_connection_new(S2N_SERVER),
s2n_connection_ptr_free);
server->actual_protocol_version = S2N_TLS13;
EXPECT_SUCCESS(s2n_stuffer_copy(&input, &server->handshake.io,
s2n_stuffer_data_available(&input)));
EXPECT_FAILURE_WITH_ERRNO(s2n_client_cert_recv(server), S2N_ERR_DECODE_CERTIFICATE);
EXPECT_NOT_EQUAL(server->handshake_params.client_cert_chain.size, 0);
EXPECT_NOT_NULL(server->handshake_params.client_cert_chain.data);
}
/* Modify the last certificate's TLS extension list to be malformed.
*
* We want the parsing error to occur as late as possible (on the last
* extension list) to test that the cert chain is not partially stored.
*/
EXPECT_SUCCESS(s2n_stuffer_reread(&input));
EXPECT_SUCCESS(s2n_stuffer_wipe_n(&input, 1));
EXPECT_SUCCESS(s2n_stuffer_write_vector_size(&total_size));
DEFER_CLEANUP(struct s2n_connection *server = s2n_connection_new(S2N_SERVER),
s2n_connection_ptr_free);
server->actual_protocol_version = S2N_TLS13;
EXPECT_SUCCESS(s2n_stuffer_copy(&input, &server->handshake.io,
s2n_stuffer_data_available(&input)));
/* Assert that no part of the certificate chain is stored */
EXPECT_FAILURE_WITH_ERRNO(s2n_client_cert_recv(server), S2N_ERR_BAD_MESSAGE);
EXPECT_EQUAL(server->handshake_params.client_cert_chain.size, 0);
EXPECT_NULL(server->handshake_params.client_cert_chain.data);
};
};
/* Test s2n_cert_chain_and_key_set_ocsp_data */
{
uint8_t more_ocsp_data[] = "more ocsp data";
DEFER_CLEANUP(struct s2n_cert_chain_and_key *chain = NULL,
s2n_cert_chain_and_key_ptr_free);
EXPECT_SUCCESS(s2n_test_cert_chain_and_key_new(&chain,
S2N_DEFAULT_TEST_CERT_CHAIN, S2N_DEFAULT_TEST_PRIVATE_KEY));
/* Safety checks */
EXPECT_FAILURE(s2n_cert_chain_and_key_set_ocsp_data(NULL, ocsp_data, sizeof(ocsp_data)));
/* Set ocsp data */
EXPECT_SUCCESS(s2n_cert_chain_and_key_set_ocsp_data(chain, ocsp_data, sizeof(ocsp_data)));
EXPECT_EQUAL(chain->ocsp_status.size, sizeof(ocsp_data));
EXPECT_BYTEARRAY_EQUAL(chain->ocsp_status.data, ocsp_data, sizeof(ocsp_data));
/* Change oscp data */
EXPECT_SUCCESS(s2n_cert_chain_and_key_set_ocsp_data(chain, more_ocsp_data, sizeof(more_ocsp_data)));
EXPECT_EQUAL(chain->ocsp_status.size, sizeof(more_ocsp_data));
EXPECT_BYTEARRAY_EQUAL(chain->ocsp_status.data, more_ocsp_data, sizeof(more_ocsp_data));
/* Free ocsp data */
EXPECT_SUCCESS(s2n_cert_chain_and_key_set_ocsp_data(chain, NULL, 0));
EXPECT_EQUAL(chain->ocsp_status.size, 0);
/* Set ocsp data again */
EXPECT_SUCCESS(s2n_cert_chain_and_key_set_ocsp_data(chain, ocsp_data, sizeof(ocsp_data)));
EXPECT_EQUAL(chain->ocsp_status.size, sizeof(ocsp_data));
EXPECT_BYTEARRAY_EQUAL(chain->ocsp_status.data, ocsp_data, sizeof(ocsp_data));
};
/* Test s2n_cert_chain_and_key_set_sct_list */
{
uint8_t sct_list[] = "sct list";
uint8_t other_sct_list[] = "other sct list";
DEFER_CLEANUP(struct s2n_cert_chain_and_key *chain = NULL,
s2n_cert_chain_and_key_ptr_free);
EXPECT_SUCCESS(s2n_test_cert_chain_and_key_new(&chain,
S2N_DEFAULT_TEST_CERT_CHAIN, S2N_DEFAULT_TEST_PRIVATE_KEY));
/* Safety checks */
EXPECT_FAILURE(s2n_cert_chain_and_key_set_sct_list(NULL, sct_list, sizeof(sct_list)));
/* Set sct list */
EXPECT_SUCCESS(s2n_cert_chain_and_key_set_sct_list(chain, sct_list, sizeof(sct_list)));
EXPECT_EQUAL(chain->sct_list.size, sizeof(sct_list));
EXPECT_BYTEARRAY_EQUAL(chain->sct_list.data, sct_list, sizeof(sct_list));
/* Change sct list */
EXPECT_SUCCESS(s2n_cert_chain_and_key_set_sct_list(chain, other_sct_list, sizeof(other_sct_list)));
EXPECT_EQUAL(chain->sct_list.size, sizeof(other_sct_list));
EXPECT_BYTEARRAY_EQUAL(chain->sct_list.data, other_sct_list, sizeof(other_sct_list));
/* Free sct list */
EXPECT_SUCCESS(s2n_cert_chain_and_key_set_sct_list(chain, NULL, 0));
EXPECT_EQUAL(chain->sct_list.size, 0);
/* Set sct list again */
EXPECT_SUCCESS(s2n_cert_chain_and_key_set_sct_list(chain, sct_list, sizeof(sct_list)));
EXPECT_EQUAL(chain->sct_list.size, sizeof(sct_list));
EXPECT_BYTEARRAY_EQUAL(chain->sct_list.data, sct_list, sizeof(sct_list));
};
/* Test s2n_cert_chain_and_key_load_cns */
{
DEFER_CLEANUP(struct s2n_cert_chain_and_key *chain = NULL,
s2n_cert_chain_and_key_ptr_free);
EXPECT_SUCCESS(s2n_test_cert_chain_and_key_new(&chain,
S2N_DEFAULT_TEST_CERT_CHAIN,
S2N_DEFAULT_TEST_PRIVATE_KEY));
POSIX_ENSURE_REF(chain->cert_chain);
struct s2n_cert *head = chain->cert_chain->head;
POSIX_ENSURE_REF(head);
struct s2n_blob *leaf_bytes = &head->raw;
const unsigned char *leaf_der = leaf_bytes->data;
EXPECT_NOT_NULL(leaf_der);
DEFER_CLEANUP(X509 *cert = NULL, X509_free_pointer);
cert = d2i_X509(NULL, &leaf_der, leaf_bytes->size);
EXPECT_NOT_NULL(cert);
DEFER_CLEANUP(X509_NAME *x509_name = NULL, X509_NAME_free_pointer);
x509_name = X509_NAME_new();
EXPECT_NOT_NULL(x509_name);
/* We start with one CN name already */
uint32_t len = 0;
EXPECT_OK(s2n_array_num_elements(chain->cn_names, &len));
EXPECT_EQUAL(len, 1);
/* Try loading a zero length CN name */
EXPECT_SUCCESS(X509_NAME_add_entry_by_NID(x509_name, NID_commonName, V_ASN1_IA5STRING,
(unsigned char *) (uintptr_t) "", -1, -1, 1));
EXPECT_EQUAL(X509_set_subject_name(cert, x509_name), 1);
EXPECT_SUCCESS(s2n_cert_chain_and_key_load_cns(chain, cert));
/* No CN name has been added */
EXPECT_OK(s2n_array_num_elements(chain->cn_names, &len));
EXPECT_EQUAL(len, 1);
/* Try loading an invalid CN name */
EXPECT_SUCCESS(X509_NAME_add_entry_by_NID(x509_name, NID_commonName, 29,
(unsigned char *) (uintptr_t) "invalid", -1, -1, 1));
EXPECT_EQUAL(X509_set_subject_name(cert, x509_name), 1);
EXPECT_SUCCESS(s2n_cert_chain_and_key_load_cns(chain, cert));
/* No CN name has been added */
EXPECT_OK(s2n_array_num_elements(chain->cn_names, &len));
EXPECT_EQUAL(len, 1);
/* Add a valid CN name */
EXPECT_SUCCESS(X509_NAME_add_entry_by_NID(x509_name, NID_commonName, V_ASN1_IA5STRING,
(unsigned char *) (uintptr_t) "valid", -1, -1, 1));
EXPECT_EQUAL(X509_set_subject_name(cert, x509_name), 1);
EXPECT_SUCCESS(s2n_cert_chain_and_key_load_cns(chain, cert));
/* 1 more CN name has been added */
EXPECT_OK(s2n_array_num_elements(chain->cn_names, &len));
EXPECT_EQUAL(len, 2);
};
END_TEST();
}
|
