summaryrefslogtreecommitdiff
path: root/security/nss/gtests/ssl_gtest/ssl_ecdh_unittest.cc
blob: 12c6e8516ce7518ad916bfb425a56f7eff722454 (plain)
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
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this file,
 * You can obtain one at http://mozilla.org/MPL/2.0/. */

#include <functional>
#include <memory>
#include "secerr.h"
#include "ssl.h"
#include "sslerr.h"
#include "sslproto.h"

extern "C" {
// This is not something that should make you happy.
#include "libssl_internals.h"
}

#include "gtest_utils.h"
#include "scoped_ptrs.h"
#include "tls_connect.h"
#include "tls_filter.h"
#include "tls_parser.h"

namespace nss_test {

TEST_P(TlsConnectGenericPre13, ConnectEcdh) {
  SetExpectedVersion(std::get<1>(GetParam()));
  Reset(TlsAgent::kServerEcdhEcdsa);
  DisableAllCiphers();
  EnableSomeEcdhCiphers();

  Connect();
  CheckKeys(ssl_kea_ecdh, ssl_grp_ec_secp256r1, ssl_auth_ecdh_ecdsa,
            ssl_sig_none);
}

TEST_P(TlsConnectGenericPre13, ConnectEcdhWithoutDisablingSuites) {
  SetExpectedVersion(std::get<1>(GetParam()));
  Reset(TlsAgent::kServerEcdhEcdsa);
  EnableSomeEcdhCiphers();

  Connect();
  CheckKeys(ssl_kea_ecdh, ssl_grp_ec_secp256r1, ssl_auth_ecdh_ecdsa,
            ssl_sig_none);
}

TEST_P(TlsConnectGeneric, ConnectEcdhe) {
  Connect();
  CheckKeys();
}

// If we pick a 256-bit cipher suite and use a P-384 certificate, the server
// should choose P-384 for key exchange too.  Only valid for TLS == 1.2 because
// we don't have 256-bit ciphers before then and 1.3 doesn't try to couple
// DHE size to symmetric size.
TEST_P(TlsConnectTls12, ConnectEcdheP384) {
  Reset(TlsAgent::kServerEcdsa384);
  ConnectWithCipherSuite(TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256);
  CheckKeys(ssl_kea_ecdh, ssl_grp_ec_secp384r1, ssl_auth_ecdsa,
            ssl_sig_ecdsa_secp256r1_sha256);
}

TEST_P(TlsConnectGeneric, ConnectEcdheP384Client) {
  EnsureTlsSetup();
  const std::vector<SSLNamedGroup> groups = {ssl_grp_ec_secp384r1,
                                             ssl_grp_ffdhe_2048};
  client_->ConfigNamedGroups(groups);
  server_->ConfigNamedGroups(groups);
  Connect();
  CheckKeys(ssl_kea_ecdh, ssl_grp_ec_secp384r1, ssl_auth_rsa_sign,
            ssl_sig_rsa_pss_rsae_sha256);
}

// This causes a HelloRetryRequest in TLS 1.3.  Earlier versions don't care.
TEST_P(TlsConnectGeneric, ConnectEcdheP384Server) {
  EnsureTlsSetup();
  auto hrr_capture = MakeTlsFilter<TlsHandshakeRecorder>(
      server_, kTlsHandshakeHelloRetryRequest);
  const std::vector<SSLNamedGroup> groups = {ssl_grp_ec_secp384r1};
  server_->ConfigNamedGroups(groups);
  Connect();
  CheckKeys(ssl_kea_ecdh, ssl_grp_ec_secp384r1, ssl_auth_rsa_sign,
            ssl_sig_rsa_pss_rsae_sha256);
  EXPECT_EQ(version_ == SSL_LIBRARY_VERSION_TLS_1_3,
            hrr_capture->buffer().len() != 0);
}

// This enables only P-256 on the client and disables it on the server.
// This test will fail when we add other groups that identify as ECDHE.
TEST_P(TlsConnectGeneric, ConnectEcdheGroupMismatch) {
  EnsureTlsSetup();
  const std::vector<SSLNamedGroup> client_groups = {ssl_grp_ec_secp256r1,
                                                    ssl_grp_ffdhe_2048};
  const std::vector<SSLNamedGroup> server_groups = {ssl_grp_ffdhe_2048};
  client_->ConfigNamedGroups(client_groups);
  server_->ConfigNamedGroups(server_groups);

  Connect();
  CheckKeys(ssl_kea_dh, ssl_auth_rsa_sign);
}

TEST_P(TlsKeyExchangeTest, P384Priority) {
  // P256, P384 and P521 are enabled. Both prefer P384.
  const std::vector<SSLNamedGroup> groups = {
      ssl_grp_ec_secp384r1, ssl_grp_ec_secp256r1, ssl_grp_ec_secp521r1};
  EnsureKeyShareSetup();
  ConfigNamedGroups(groups);
  client_->DisableAllCiphers();
  client_->EnableCiphersByKeyExchange(ssl_kea_ecdh);
  Connect();

  CheckKeys(ssl_kea_ecdh, ssl_grp_ec_secp384r1, ssl_auth_rsa_sign,
            ssl_sig_rsa_pss_rsae_sha256);

  std::vector<SSLNamedGroup> shares = {ssl_grp_ec_secp384r1};
  CheckKEXDetails(groups, shares);
}

TEST_P(TlsKeyExchangeTest, DuplicateGroupConfig) {
  const std::vector<SSLNamedGroup> groups = {
      ssl_grp_ec_secp384r1, ssl_grp_ec_secp384r1, ssl_grp_ec_secp384r1,
      ssl_grp_ec_secp256r1, ssl_grp_ec_secp256r1};
  EnsureKeyShareSetup();
  ConfigNamedGroups(groups);
  client_->DisableAllCiphers();
  client_->EnableCiphersByKeyExchange(ssl_kea_ecdh);
  Connect();

  CheckKeys(ssl_kea_ecdh, ssl_grp_ec_secp384r1, ssl_auth_rsa_sign,
            ssl_sig_rsa_pss_rsae_sha256);

  std::vector<SSLNamedGroup> shares = {ssl_grp_ec_secp384r1};
  std::vector<SSLNamedGroup> expectedGroups = {ssl_grp_ec_secp384r1,
                                               ssl_grp_ec_secp256r1};
  CheckKEXDetails(expectedGroups, shares);
}

TEST_P(TlsKeyExchangeTest, P384PriorityDHEnabled) {
  // P256, P384,  P521, and FFDHE2048 are enabled. Both prefer P384.
  const std::vector<SSLNamedGroup> groups = {
      ssl_grp_ec_secp384r1, ssl_grp_ffdhe_2048, ssl_grp_ec_secp256r1,
      ssl_grp_ec_secp521r1};
  EnsureKeyShareSetup();
  ConfigNamedGroups(groups);
  Connect();

  CheckKeys(ssl_kea_ecdh, ssl_grp_ec_secp384r1, ssl_auth_rsa_sign,
            ssl_sig_rsa_pss_rsae_sha256);

  if (version_ >= SSL_LIBRARY_VERSION_TLS_1_3) {
    std::vector<SSLNamedGroup> shares = {ssl_grp_ec_secp384r1};
    CheckKEXDetails(groups, shares);
  } else {
    std::vector<SSLNamedGroup> oldtlsgroups = {
        ssl_grp_ec_secp384r1, ssl_grp_ec_secp256r1, ssl_grp_ec_secp521r1};
    CheckKEXDetails(oldtlsgroups, std::vector<SSLNamedGroup>());
  }
}

TEST_P(TlsConnectGenericPre13, P384PriorityOnServer) {
  EnsureTlsSetup();
  client_->DisableAllCiphers();
  client_->EnableCiphersByKeyExchange(ssl_kea_ecdh);

  // The server prefers P384. It has to win.
  const std::vector<SSLNamedGroup> server_groups = {
      ssl_grp_ec_secp384r1, ssl_grp_ec_secp256r1, ssl_grp_ec_secp521r1};
  server_->ConfigNamedGroups(server_groups);

  Connect();

  CheckKeys(ssl_kea_ecdh, ssl_grp_ec_secp384r1, ssl_auth_rsa_sign,
            ssl_sig_rsa_pss_rsae_sha256);
}

TEST_P(TlsConnectGenericPre13, P384PriorityFromModelSocket) {
  EnsureModelSockets();

  /* Both prefer P384, set on the model socket. */
  const std::vector<SSLNamedGroup> groups = {
      ssl_grp_ec_secp384r1, ssl_grp_ec_secp256r1, ssl_grp_ec_secp521r1,
      ssl_grp_ffdhe_2048};
  client_model_->ConfigNamedGroups(groups);
  server_model_->ConfigNamedGroups(groups);

  Connect();

  CheckKeys(ssl_kea_ecdh, ssl_grp_ec_secp384r1, ssl_auth_rsa_sign,
            ssl_sig_rsa_pss_rsae_sha256);
}

class TlsKeyExchangeGroupCapture : public TlsHandshakeFilter {
 public:
  TlsKeyExchangeGroupCapture(const std::shared_ptr<TlsAgent> &a)
      : TlsHandshakeFilter(a, {kTlsHandshakeServerKeyExchange}),
        group_(ssl_grp_none) {}

  SSLNamedGroup group() const { return group_; }

 protected:
  virtual PacketFilter::Action FilterHandshake(const HandshakeHeader &header,
                                               const DataBuffer &input,
                                               DataBuffer *output) {
    uint32_t value = 0;
    EXPECT_TRUE(input.Read(0, 1, &value));
    EXPECT_EQ(3U, value) << "curve type has to be 3";

    EXPECT_TRUE(input.Read(1, 2, &value));
    group_ = static_cast<SSLNamedGroup>(value);

    return KEEP;
  }

 private:
  SSLNamedGroup group_;
};

// If we strip the client's supported groups extension, the server should assume
// P-256 is supported by the client (<= 1.2 only).
TEST_P(TlsConnectGenericPre13, DropSupportedGroupExtensionP256) {
  EnsureTlsSetup();
  MakeTlsFilter<TlsExtensionDropper>(client_, ssl_supported_groups_xtn);
  auto group_capture = MakeTlsFilter<TlsKeyExchangeGroupCapture>(server_);

  ConnectExpectAlert(server_, kTlsAlertDecryptError);
  client_->CheckErrorCode(SSL_ERROR_DECRYPT_ERROR_ALERT);
  server_->CheckErrorCode(SSL_ERROR_BAD_HANDSHAKE_HASH_VALUE);

  EXPECT_EQ(ssl_grp_ec_secp256r1, group_capture->group());
}

// Supported groups is mandatory in TLS 1.3.
TEST_P(TlsConnectTls13, DropSupportedGroupExtension) {
  EnsureTlsSetup();
  MakeTlsFilter<TlsExtensionDropper>(client_, ssl_supported_groups_xtn);
  ConnectExpectAlert(server_, kTlsAlertMissingExtension);
  client_->CheckErrorCode(SSL_ERROR_MISSING_EXTENSION_ALERT);
  server_->CheckErrorCode(SSL_ERROR_MISSING_SUPPORTED_GROUPS_EXTENSION);
}

// If we only have a lame group, we fall back to static RSA.
TEST_P(TlsConnectGenericPre13, UseLameGroup) {
  const std::vector<SSLNamedGroup> groups = {ssl_grp_ec_secp192r1};
  client_->ConfigNamedGroups(groups);
  server_->ConfigNamedGroups(groups);
  Connect();
  CheckKeys(ssl_kea_rsa, ssl_grp_none, ssl_auth_rsa_decrypt, ssl_sig_none);
}

// In TLS 1.3, we can't generate the ClientHello.
TEST_P(TlsConnectTls13, UseLameGroup) {
  const std::vector<SSLNamedGroup> groups = {ssl_grp_ec_sect283k1};
  client_->ConfigNamedGroups(groups);
  server_->ConfigNamedGroups(groups);
  client_->StartConnect();
  client_->Handshake();
  client_->CheckErrorCode(SSL_ERROR_NO_CIPHERS_SUPPORTED);
}

TEST_P(TlsConnectStreamPre13, ConfiguredGroupsRenegotiate) {
  EnsureTlsSetup();
  client_->DisableAllCiphers();
  client_->EnableCiphersByKeyExchange(ssl_kea_ecdh);

  const std::vector<SSLNamedGroup> client_groups = {ssl_grp_ec_secp256r1};
  const std::vector<SSLNamedGroup> server_groups = {ssl_grp_ec_secp256r1,
                                                    ssl_grp_ec_secp256r1};
  client_->ConfigNamedGroups(client_groups);
  server_->ConfigNamedGroups(server_groups);

  Connect();

  CheckKeys(ssl_kea_ecdh, ssl_grp_ec_secp256r1, ssl_auth_rsa_sign,
            ssl_sig_rsa_pss_rsae_sha256);
  CheckConnected();

  // The renegotiation has to use the same preferences as the original session.
  server_->PrepareForRenegotiate();
  client_->StartRenegotiate();
  Handshake();
  CheckKeys(ssl_kea_ecdh, ssl_grp_ec_secp256r1, ssl_auth_rsa_sign,
            ssl_sig_rsa_pss_rsae_sha256);
}

TEST_P(TlsKeyExchangeTest, Curve25519) {
  Reset(TlsAgent::kServerEcdsa256);
  const std::vector<SSLNamedGroup> groups = {
      ssl_grp_ec_curve25519, ssl_grp_ec_secp256r1, ssl_grp_ec_secp521r1};
  EnsureKeyShareSetup();
  ConfigNamedGroups(groups);
  Connect();

  CheckKeys(ssl_kea_ecdh, ssl_grp_ec_curve25519, ssl_auth_ecdsa,
            ssl_sig_ecdsa_secp256r1_sha256);
  const std::vector<SSLNamedGroup> shares = {ssl_grp_ec_curve25519};
  CheckKEXDetails(groups, shares);
}

TEST_P(TlsConnectGenericPre13, GroupPreferenceServerPriority) {
  EnsureTlsSetup();
  client_->DisableAllCiphers();
  client_->EnableCiphersByKeyExchange(ssl_kea_ecdh);

  // The client prefers P256 while the server prefers 25519.
  // The server's preference has to win.
  const std::vector<SSLNamedGroup> client_groups = {ssl_grp_ec_secp256r1,
                                                    ssl_grp_ec_curve25519};
  const std::vector<SSLNamedGroup> server_groups = {ssl_grp_ec_curve25519,
                                                    ssl_grp_ec_secp256r1};
  client_->ConfigNamedGroups(client_groups);
  server_->ConfigNamedGroups(server_groups);

  Connect();

  CheckKeys(ssl_kea_ecdh, ssl_grp_ec_curve25519, ssl_auth_rsa_sign,
            ssl_sig_rsa_pss_rsae_sha256);
}

#ifndef NSS_DISABLE_TLS_1_3
TEST_P(TlsKeyExchangeTest13, Curve25519P256EqualPriorityClient13) {
  EnsureKeyShareSetup();

  // The client sends a P256 key share while the server prefers 25519.
  // We have to accept P256 without retry.
  const std::vector<SSLNamedGroup> client_groups = {ssl_grp_ec_secp256r1,
                                                    ssl_grp_ec_curve25519};
  const std::vector<SSLNamedGroup> server_groups = {ssl_grp_ec_curve25519,
                                                    ssl_grp_ec_secp256r1};
  client_->ConfigNamedGroups(client_groups);
  server_->ConfigNamedGroups(server_groups);

  Connect();

  CheckKeys(ssl_kea_ecdh, ssl_grp_ec_secp256r1, ssl_auth_rsa_sign,
            ssl_sig_rsa_pss_rsae_sha256);
  const std::vector<SSLNamedGroup> shares = {ssl_grp_ec_secp256r1};
  CheckKEXDetails(client_groups, shares);
}

TEST_P(TlsKeyExchangeTest13, Curve25519P256EqualPriorityServer13) {
  EnsureKeyShareSetup();

  // The client sends a 25519 key share while the server prefers P256.
  // We have to accept 25519 without retry.
  const std::vector<SSLNamedGroup> client_groups = {ssl_grp_ec_curve25519,
                                                    ssl_grp_ec_secp256r1};
  const std::vector<SSLNamedGroup> server_groups = {ssl_grp_ec_secp256r1,
                                                    ssl_grp_ec_curve25519};
  client_->ConfigNamedGroups(client_groups);
  server_->ConfigNamedGroups(server_groups);

  Connect();

  CheckKeys(ssl_kea_ecdh, ssl_grp_ec_curve25519, ssl_auth_rsa_sign,
            ssl_sig_rsa_pss_rsae_sha256);
  const std::vector<SSLNamedGroup> shares = {ssl_grp_ec_curve25519};
  CheckKEXDetails(client_groups, shares);
}

TEST_P(TlsKeyExchangeTest13, EqualPriorityTestRetryECServer13) {
  EnsureKeyShareSetup();

  // The client sends a 25519 key share while the server prefers P256.
  // The server prefers P-384 over x25519, so it must not consider P-256 and
  // x25519 to be equivalent. It will therefore request a P-256 share
  // with a HelloRetryRequest.
  const std::vector<SSLNamedGroup> client_groups = {
      ssl_grp_ec_curve25519, ssl_grp_ec_secp256r1, ssl_grp_ec_secp384r1};
  const std::vector<SSLNamedGroup> server_groups = {
      ssl_grp_ec_secp256r1, ssl_grp_ec_secp384r1, ssl_grp_ec_curve25519};
  client_->ConfigNamedGroups(client_groups);
  server_->ConfigNamedGroups(server_groups);

  Connect();

  CheckKeys(ssl_kea_ecdh, ssl_grp_ec_secp256r1, ssl_auth_rsa_sign,
            ssl_sig_rsa_pss_rsae_sha256);
  const std::vector<SSLNamedGroup> shares = {ssl_grp_ec_curve25519};
  CheckKEXDetails(client_groups, shares, ssl_grp_ec_secp256r1);
}

TEST_P(TlsKeyExchangeTest13, NotEqualPriorityWithIntermediateGroup13) {
  EnsureKeyShareSetup();

  // The client sends a 25519 key share while the server prefers P256.
  // The server prefers ffdhe_2048 over x25519, so it must not consider the
  // P-256 and x25519 to be equivalent. It will therefore request a P-256 share
  // with a HelloRetryRequest.
  const std::vector<SSLNamedGroup> client_groups = {
      ssl_grp_ec_curve25519, ssl_grp_ec_secp256r1, ssl_grp_ffdhe_2048};
  const std::vector<SSLNamedGroup> server_groups = {
      ssl_grp_ec_secp256r1, ssl_grp_ffdhe_2048, ssl_grp_ec_curve25519};
  client_->ConfigNamedGroups(client_groups);
  server_->ConfigNamedGroups(server_groups);

  Connect();

  CheckKeys(ssl_kea_ecdh, ssl_grp_ec_secp256r1, ssl_auth_rsa_sign,
            ssl_sig_rsa_pss_rsae_sha256);
  const std::vector<SSLNamedGroup> shares = {ssl_grp_ec_curve25519};
  CheckKEXDetails(client_groups, shares, ssl_grp_ec_secp256r1);
}

TEST_P(TlsKeyExchangeTest13,
       NotEqualPriorityWithUnsupportedFFIntermediateGroup13) {
  EnsureKeyShareSetup();

  // As in the previous test, the server prefers ffdhe_2048. Thus, even though
  // the client doesn't support this group, the server must not regard x25519 as
  // equivalent to P-256.
  const std::vector<SSLNamedGroup> client_groups = {ssl_grp_ec_curve25519,
                                                    ssl_grp_ec_secp256r1};
  const std::vector<SSLNamedGroup> server_groups = {
      ssl_grp_ec_secp256r1, ssl_grp_ffdhe_2048, ssl_grp_ec_curve25519};
  client_->ConfigNamedGroups(client_groups);
  server_->ConfigNamedGroups(server_groups);

  Connect();

  CheckKeys(ssl_kea_ecdh, ssl_grp_ec_secp256r1, ssl_auth_rsa_sign,
            ssl_sig_rsa_pss_rsae_sha256);
  const std::vector<SSLNamedGroup> shares = {ssl_grp_ec_curve25519};
  CheckKEXDetails(client_groups, shares, ssl_grp_ec_secp256r1);
}

TEST_P(TlsKeyExchangeTest13,
       NotEqualPriorityWithUnsupportedECIntermediateGroup13) {
  EnsureKeyShareSetup();

  // As in the previous test, the server prefers P-384. Thus, even though
  // the client doesn't support this group, the server must not regard x25519 as
  // equivalent to P-256. The server sends a HelloRetryRequest.
  const std::vector<SSLNamedGroup> client_groups = {ssl_grp_ec_curve25519,
                                                    ssl_grp_ec_secp256r1};
  const std::vector<SSLNamedGroup> server_groups = {
      ssl_grp_ec_secp256r1, ssl_grp_ec_secp384r1, ssl_grp_ec_curve25519};
  client_->ConfigNamedGroups(client_groups);
  server_->ConfigNamedGroups(server_groups);

  Connect();

  CheckKeys(ssl_kea_ecdh, ssl_grp_ec_secp256r1, ssl_auth_rsa_sign,
            ssl_sig_rsa_pss_rsae_sha256);
  const std::vector<SSLNamedGroup> shares = {ssl_grp_ec_curve25519};
  CheckKEXDetails(client_groups, shares, ssl_grp_ec_secp256r1);
}

TEST_P(TlsKeyExchangeTest13, EqualPriority13) {
  EnsureKeyShareSetup();

  // The client sends a 25519 key share while the server prefers P256.
  // We have to accept 25519 without retry because it's considered equivalent to
  // P256 by the server.
  const std::vector<SSLNamedGroup> client_groups = {
      ssl_grp_ec_curve25519, ssl_grp_ffdhe_2048, ssl_grp_ec_secp256r1};
  const std::vector<SSLNamedGroup> server_groups = {ssl_grp_ec_secp256r1,
                                                    ssl_grp_ec_curve25519};
  client_->ConfigNamedGroups(client_groups);
  server_->ConfigNamedGroups(server_groups);

  Connect();

  CheckKeys();
  const std::vector<SSLNamedGroup> shares = {ssl_grp_ec_curve25519};
  CheckKEXDetails(client_groups, shares);
}
#endif

TEST_P(TlsConnectGeneric, P256ClientAndCurve25519Server) {
  EnsureTlsSetup();
  client_->DisableAllCiphers();
  client_->EnableCiphersByKeyExchange(ssl_kea_ecdh);

  // The client sends a P256 key share while the server prefers 25519.
  const std::vector<SSLNamedGroup> client_groups = {ssl_grp_ec_secp256r1};
  const std::vector<SSLNamedGroup> server_groups = {ssl_grp_ec_curve25519};

  client_->ConfigNamedGroups(client_groups);
  server_->ConfigNamedGroups(server_groups);

  ConnectExpectAlert(server_, kTlsAlertHandshakeFailure);
  client_->CheckErrorCode(SSL_ERROR_NO_CYPHER_OVERLAP);
  server_->CheckErrorCode(SSL_ERROR_NO_CYPHER_OVERLAP);
}

TEST_P(TlsKeyExchangeTest13, MultipleClientShares) {
  EnsureKeyShareSetup();

  // The client sends 25519 and P256 key shares. The server prefers P256,
  // which must be chosen here.
  const std::vector<SSLNamedGroup> client_groups = {ssl_grp_ec_curve25519,
                                                    ssl_grp_ec_secp256r1};
  const std::vector<SSLNamedGroup> server_groups = {ssl_grp_ec_secp256r1,
                                                    ssl_grp_ec_curve25519};
  client_->ConfigNamedGroups(client_groups);
  server_->ConfigNamedGroups(server_groups);

  // Generate a key share on the client for both curves.
  EXPECT_EQ(SECSuccess, SSL_SendAdditionalKeyShares(client_->ssl_fd(), 1));

  Connect();

  // The server would accept 25519 but its preferred group (P256) has to win.
  CheckKeys(ssl_kea_ecdh, ssl_grp_ec_secp256r1, ssl_auth_rsa_sign,
            ssl_sig_rsa_pss_rsae_sha256);
  const std::vector<SSLNamedGroup> shares = {ssl_grp_ec_curve25519,
                                             ssl_grp_ec_secp256r1};
  CheckKEXDetails(client_groups, shares);
}

// Replace the point in the client key exchange message with an empty one
class ECCClientKEXFilter : public TlsHandshakeFilter {
 public:
  ECCClientKEXFilter(const std::shared_ptr<TlsAgent> &client)
      : TlsHandshakeFilter(client, {kTlsHandshakeClientKeyExchange}) {}

 protected:
  virtual PacketFilter::Action FilterHandshake(const HandshakeHeader &header,
                                               const DataBuffer &input,
                                               DataBuffer *output) {
    // Replace the client key exchange message with an empty point
    output->Allocate(1);
    output->Write(0, 0U, 1);  // set point length 0
    return CHANGE;
  }
};

// Replace the point in the server key exchange message with an empty one
class ECCServerKEXFilter : public TlsHandshakeFilter {
 public:
  ECCServerKEXFilter(const std::shared_ptr<TlsAgent> &server)
      : TlsHandshakeFilter(server, {kTlsHandshakeServerKeyExchange}) {}

 protected:
  virtual PacketFilter::Action FilterHandshake(const HandshakeHeader &header,
                                               const DataBuffer &input,
                                               DataBuffer *output) {
    // Replace the server key exchange message with an empty point
    output->Allocate(4);
    output->Write(0, 3U, 1);  // named curve
    uint32_t curve = 0;
    EXPECT_TRUE(input.Read(1, 2, &curve));  // get curve id
    output->Write(1, curve, 2);             // write curve id
    output->Write(3, 0U, 1);                // point length 0
    return CHANGE;
  }
};

TEST_P(TlsConnectGenericPre13, ConnectECDHEmptyServerPoint) {
  MakeTlsFilter<ECCServerKEXFilter>(server_);
  ConnectExpectAlert(client_, kTlsAlertIllegalParameter);
  client_->CheckErrorCode(SSL_ERROR_RX_MALFORMED_SERVER_KEY_EXCH);
}

TEST_P(TlsConnectGenericPre13, ConnectECDHEmptyClientPoint) {
  MakeTlsFilter<ECCClientKEXFilter>(client_);
  ConnectExpectAlert(server_, kTlsAlertIllegalParameter);
  server_->CheckErrorCode(SSL_ERROR_RX_MALFORMED_CLIENT_KEY_EXCH);
}

// Damage ECParams/ECPoint of a SKE.
class ECCServerKEXDamager : public TlsHandshakeFilter {
 public:
  ECCServerKEXDamager(const std::shared_ptr<TlsAgent> &server, ECType ec_type,
                      SSLNamedGroup named_curve)
      : TlsHandshakeFilter(server, {kTlsHandshakeServerKeyExchange}),
        ec_type_(ec_type),
        named_curve_(named_curve) {}

 protected:
  virtual PacketFilter::Action FilterHandshake(const HandshakeHeader &header,
                                               const DataBuffer &input,
                                               DataBuffer *output) {
    size_t offset = 0;
    output->Allocate(5);
    offset = output->Write(offset, ec_type_, 1);
    offset = output->Write(offset, named_curve_, 2);
    // Write a point with fmt != EC_POINT_FORM_UNCOMPRESSED.
    offset = output->Write(offset, 1U, 1);
    (void)output->Write(offset, 0x02, 1);  // EC_POINT_FORM_COMPRESSED_Y0
    return CHANGE;
  }

 private:
  ECType ec_type_;
  SSLNamedGroup named_curve_;
};

TEST_P(TlsConnectGenericPre13, ConnectUnsupportedCurveType) {
  EnsureTlsSetup();
  client_->DisableAllCiphers();
  client_->EnableCiphersByKeyExchange(ssl_kea_ecdh);

  MakeTlsFilter<ECCServerKEXDamager>(server_, ec_type_explicitPrime,
                                     ssl_grp_none);
  ConnectExpectAlert(client_, kTlsAlertHandshakeFailure);
  client_->CheckErrorCode(SEC_ERROR_UNSUPPORTED_ELLIPTIC_CURVE);
}

TEST_P(TlsConnectGenericPre13, ConnectUnsupportedCurve) {
  EnsureTlsSetup();
  client_->DisableAllCiphers();
  client_->EnableCiphersByKeyExchange(ssl_kea_ecdh);

  MakeTlsFilter<ECCServerKEXDamager>(server_, ec_type_named,
                                     ssl_grp_ffdhe_2048);
  ConnectExpectAlert(client_, kTlsAlertHandshakeFailure);
  client_->CheckErrorCode(SEC_ERROR_UNSUPPORTED_ELLIPTIC_CURVE);
}

TEST_P(TlsConnectGenericPre13, ConnectUnsupportedPointFormat) {
  EnsureTlsSetup();
  client_->DisableAllCiphers();
  client_->EnableCiphersByKeyExchange(ssl_kea_ecdh);

  MakeTlsFilter<ECCServerKEXDamager>(server_, ec_type_named,
                                     ssl_grp_ec_secp256r1);
  ConnectExpectAlert(client_, kTlsAlertHandshakeFailure);
  client_->CheckErrorCode(SEC_ERROR_UNSUPPORTED_EC_POINT_FORM);
}

// Replace SignatureAndHashAlgorithm of a SKE.
class ECCServerKEXSigAlgReplacer : public TlsHandshakeFilter {
 public:
  ECCServerKEXSigAlgReplacer(const std::shared_ptr<TlsAgent> &server,
                             SSLSignatureScheme sig_scheme)
      : TlsHandshakeFilter(server, {kTlsHandshakeServerKeyExchange}),
        sig_scheme_(sig_scheme) {}

 protected:
  virtual PacketFilter::Action FilterHandshake(const HandshakeHeader &header,
                                               const DataBuffer &input,
                                               DataBuffer *output) {
    *output = input;

    uint32_t point_len;
    EXPECT_TRUE(output->Read(3, 1, &point_len));
    output->Write(4 + point_len, sig_scheme_, 2);

    return CHANGE;
  }

 private:
  SSLSignatureScheme sig_scheme_;
};

TEST_P(TlsConnectTls12, ConnectUnsupportedSigAlg) {
  EnsureTlsSetup();
  client_->DisableAllCiphers();
  client_->EnableCiphersByKeyExchange(ssl_kea_ecdh);

  MakeTlsFilter<ECCServerKEXSigAlgReplacer>(server_, ssl_sig_none);
  ConnectExpectAlert(client_, kTlsAlertIllegalParameter);
  client_->CheckErrorCode(SSL_ERROR_UNSUPPORTED_SIGNATURE_ALGORITHM);
}

TEST_P(TlsConnectTls12, ConnectIncorrectSigAlg) {
  EnsureTlsSetup();
  client_->DisableAllCiphers();
  client_->EnableCiphersByKeyExchange(ssl_kea_ecdh);

  MakeTlsFilter<ECCServerKEXSigAlgReplacer>(server_,
                                            ssl_sig_ecdsa_secp256r1_sha256);
  ConnectExpectAlert(client_, kTlsAlertIllegalParameter);
  client_->CheckErrorCode(SSL_ERROR_INCORRECT_SIGNATURE_ALGORITHM);
}

INSTANTIATE_TEST_CASE_P(KeyExchangeTest, TlsKeyExchangeTest,
                        ::testing::Combine(TlsConnectTestBase::kTlsVariantsAll,
                                           TlsConnectTestBase::kTlsV11Plus));

#ifndef NSS_DISABLE_TLS_1_3
INSTANTIATE_TEST_CASE_P(KeyExchangeTest, TlsKeyExchangeTest13,
                        ::testing::Combine(TlsConnectTestBase::kTlsVariantsAll,
                                           TlsConnectTestBase::kTlsV13));
#endif

}  // namespace nss_test