summaryrefslogtreecommitdiffstats
path: root/security/nss/gtests/ssl_gtest/ssl_auth_unittest.cc
blob: e2a30e6bcb057a192b5b7095ef4a2dc8885bf23e (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
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
/* -*- 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 "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(TlsConnectGeneric, ServerAuthBigRsa) {
  Reset(TlsAgent::kRsa2048);
  Connect();
  CheckKeys();
}

TEST_P(TlsConnectGeneric, ServerAuthRsaChain) {
  Reset("rsa_chain");
  Connect();
  CheckKeys();
  size_t chain_length;
  EXPECT_TRUE(client_->GetPeerChainLength(&chain_length));
  EXPECT_EQ(2UL, chain_length);
}

TEST_P(TlsConnectGeneric, ServerAuthRsaPssChain) {
  Reset("rsa_pss_chain");
  Connect();
  CheckKeys();
  size_t chain_length;
  EXPECT_TRUE(client_->GetPeerChainLength(&chain_length));
  EXPECT_EQ(2UL, chain_length);
}

TEST_P(TlsConnectGeneric, ServerAuthRsaCARsaPssChain) {
  Reset("rsa_ca_rsa_pss_chain");
  Connect();
  CheckKeys();
  size_t chain_length;
  EXPECT_TRUE(client_->GetPeerChainLength(&chain_length));
  EXPECT_EQ(2UL, chain_length);
}

TEST_P(TlsConnectGeneric, ClientAuth) {
  client_->SetupClientAuth();
  server_->RequestClientAuth(true);
  Connect();
  CheckKeys();
}

// In TLS 1.3, the client sends its cert rejection on the
// second flight, and since it has already received the
// server's Finished, it transitions to complete and
// then gets an alert from the server. The test harness
// doesn't handle this right yet.
TEST_P(TlsConnectStream, DISABLED_ClientAuthRequiredRejected) {
  server_->RequestClientAuth(true);
  ConnectExpectFail();
}

TEST_P(TlsConnectGeneric, ClientAuthRequestedRejected) {
  server_->RequestClientAuth(false);
  Connect();
  CheckKeys();
}

TEST_P(TlsConnectGeneric, ClientAuthEcdsa) {
  Reset(TlsAgent::kServerEcdsa256);
  client_->SetupClientAuth();
  server_->RequestClientAuth(true);
  Connect();
  CheckKeys(ssl_kea_ecdh, ssl_auth_ecdsa);
}

TEST_P(TlsConnectGeneric, ClientAuthBigRsa) {
  Reset(TlsAgent::kServerRsa, TlsAgent::kRsa2048);
  client_->SetupClientAuth();
  server_->RequestClientAuth(true);
  Connect();
  CheckKeys();
}

// Offset is the position in the captured buffer where the signature sits.
static void CheckSigScheme(std::shared_ptr<TlsHandshakeRecorder>& capture,
                           size_t offset, std::shared_ptr<TlsAgent>& peer,
                           uint16_t expected_scheme, size_t expected_size) {
  EXPECT_LT(offset + 2U, capture->buffer().len());

  uint32_t scheme = 0;
  capture->buffer().Read(offset, 2, &scheme);
  EXPECT_EQ(expected_scheme, static_cast<uint16_t>(scheme));

  ScopedCERTCertificate remote_cert(SSL_PeerCertificate(peer->ssl_fd()));
  ScopedSECKEYPublicKey remote_key(CERT_ExtractPublicKey(remote_cert.get()));
  EXPECT_EQ(expected_size, SECKEY_PublicKeyStrengthInBits(remote_key.get()));
}

// The server should prefer SHA-256 by default, even for the small key size used
// in the default certificate.
TEST_P(TlsConnectTls12, ServerAuthCheckSigAlg) {
  EnsureTlsSetup();
  auto capture_ske = MakeTlsFilter<TlsHandshakeRecorder>(
      server_, kTlsHandshakeServerKeyExchange);
  Connect();
  CheckKeys();

  const DataBuffer& buffer = capture_ske->buffer();
  EXPECT_LT(3U, buffer.len());
  EXPECT_EQ(3U, buffer.data()[0]) << "curve_type == named_curve";
  uint32_t tmp;
  EXPECT_TRUE(buffer.Read(1, 2, &tmp)) << "read NamedCurve";
  EXPECT_EQ(ssl_grp_ec_curve25519, tmp);
  EXPECT_TRUE(buffer.Read(3, 1, &tmp)) << " read ECPoint";
  CheckSigScheme(capture_ske, 4 + tmp, client_, ssl_sig_rsa_pss_rsae_sha256,
                 1024);
}

TEST_P(TlsConnectTls12, ClientAuthCheckSigAlg) {
  EnsureTlsSetup();
  auto capture_cert_verify = MakeTlsFilter<TlsHandshakeRecorder>(
      client_, kTlsHandshakeCertificateVerify);
  client_->SetupClientAuth();
  server_->RequestClientAuth(true);
  Connect();
  CheckKeys();

  CheckSigScheme(capture_cert_verify, 0, server_, ssl_sig_rsa_pkcs1_sha1, 1024);
}

TEST_P(TlsConnectTls12, ClientAuthBigRsaCheckSigAlg) {
  Reset(TlsAgent::kServerRsa, TlsAgent::kRsa2048);
  auto capture_cert_verify = MakeTlsFilter<TlsHandshakeRecorder>(
      client_, kTlsHandshakeCertificateVerify);
  client_->SetupClientAuth();
  server_->RequestClientAuth(true);
  Connect();
  CheckKeys();
  CheckSigScheme(capture_cert_verify, 0, server_, ssl_sig_rsa_pss_rsae_sha256,
                 2048);
}

class TlsZeroCertificateRequestSigAlgsFilter : public TlsHandshakeFilter {
 public:
  TlsZeroCertificateRequestSigAlgsFilter(const std::shared_ptr<TlsAgent>& a)
      : TlsHandshakeFilter(a, {kTlsHandshakeCertificateRequest}) {}
  virtual PacketFilter::Action FilterHandshake(
      const TlsHandshakeFilter::HandshakeHeader& header,
      const DataBuffer& input, DataBuffer* output) {
    TlsParser parser(input);
    std::cerr << "Zeroing CertReq.supported_signature_algorithms" << std::endl;

    DataBuffer cert_types;
    if (!parser.ReadVariable(&cert_types, 1)) {
      ADD_FAILURE();
      return KEEP;
    }

    if (!parser.SkipVariable(2)) {
      ADD_FAILURE();
      return KEEP;
    }

    DataBuffer cas;
    if (!parser.ReadVariable(&cas, 2)) {
      ADD_FAILURE();
      return KEEP;
    }

    size_t idx = 0;

    // Write certificate types.
    idx = output->Write(idx, cert_types.len(), 1);
    idx = output->Write(idx, cert_types);

    // Write zero signature algorithms.
    idx = output->Write(idx, 0U, 2);

    // Write certificate authorities.
    idx = output->Write(idx, cas.len(), 2);
    idx = output->Write(idx, cas);

    return CHANGE;
  }
};

// Check that we fall back to SHA-1 when the server doesn't provide any
// supported_signature_algorithms in the CertificateRequest message.
TEST_P(TlsConnectTls12, ClientAuthNoSigAlgsFallback) {
  EnsureTlsSetup();
  MakeTlsFilter<TlsZeroCertificateRequestSigAlgsFilter>(server_);
  auto capture_cert_verify = MakeTlsFilter<TlsHandshakeRecorder>(
      client_, kTlsHandshakeCertificateVerify);
  client_->SetupClientAuth();
  server_->RequestClientAuth(true);

  ConnectExpectAlert(server_, kTlsAlertDecryptError);

  // We're expecting a bad signature here because we tampered with a handshake
  // message (CertReq). Previously, without the SHA-1 fallback, we would've
  // seen a malformed record alert.
  server_->CheckErrorCode(SEC_ERROR_BAD_SIGNATURE);
  client_->CheckErrorCode(SSL_ERROR_DECRYPT_ERROR_ALERT);

  CheckSigScheme(capture_cert_verify, 0, server_, ssl_sig_rsa_pkcs1_sha1, 1024);
}

static const SSLSignatureScheme SignatureSchemeEcdsaSha384[] = {
    ssl_sig_ecdsa_secp384r1_sha384};
static const SSLSignatureScheme SignatureSchemeEcdsaSha256[] = {
    ssl_sig_ecdsa_secp256r1_sha256};
static const SSLSignatureScheme SignatureSchemeRsaSha384[] = {
    ssl_sig_rsa_pkcs1_sha384};
static const SSLSignatureScheme SignatureSchemeRsaSha256[] = {
    ssl_sig_rsa_pkcs1_sha256};

static SSLNamedGroup NamedGroupForEcdsa384(uint16_t version) {
  // NSS tries to match the group size to the symmetric cipher. In TLS 1.1 and
  // 1.0, TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA is the highest priority suite, so
  // we use P-384. With TLS 1.2 on we pick AES-128 GCM so use x25519.
  if (version <= SSL_LIBRARY_VERSION_TLS_1_1) {
    return ssl_grp_ec_secp384r1;
  }
  return ssl_grp_ec_curve25519;
}

// When signature algorithms match up, this should connect successfully; even
// for TLS 1.1 and 1.0, where they should be ignored.
TEST_P(TlsConnectGeneric, SignatureAlgorithmServerAuth) {
  Reset(TlsAgent::kServerEcdsa384);
  client_->SetSignatureSchemes(SignatureSchemeEcdsaSha384,
                               PR_ARRAY_SIZE(SignatureSchemeEcdsaSha384));
  server_->SetSignatureSchemes(SignatureSchemeEcdsaSha384,
                               PR_ARRAY_SIZE(SignatureSchemeEcdsaSha384));
  Connect();
  CheckKeys(ssl_kea_ecdh, NamedGroupForEcdsa384(version_), ssl_auth_ecdsa,
            ssl_sig_ecdsa_secp384r1_sha384);
}

// Here the client picks a single option, which should work in all versions.
// Defaults on the server include the first option.
TEST_P(TlsConnectGeneric, SignatureAlgorithmClientOnly) {
  const SSLSignatureAndHashAlg clientAlgorithms[] = {
      {ssl_hash_sha384, ssl_sign_ecdsa},
      {ssl_hash_sha384, ssl_sign_rsa},  // supported but unusable
      {ssl_hash_md5, ssl_sign_ecdsa}    // unsupported and ignored
  };
  Reset(TlsAgent::kServerEcdsa384);
  EnsureTlsSetup();
  // Use the old API for this function.
  EXPECT_EQ(SECSuccess,
            SSL_SignaturePrefSet(client_->ssl_fd(), clientAlgorithms,
                                 PR_ARRAY_SIZE(clientAlgorithms)));
  Connect();
  CheckKeys(ssl_kea_ecdh, NamedGroupForEcdsa384(version_), ssl_auth_ecdsa,
            ssl_sig_ecdsa_secp384r1_sha384);
}

// Here the server picks a single option, which should work in all versions.
// Defaults on the client include the provided option.
TEST_P(TlsConnectGeneric, SignatureAlgorithmServerOnly) {
  Reset(TlsAgent::kServerEcdsa384);
  server_->SetSignatureSchemes(SignatureSchemeEcdsaSha384,
                               PR_ARRAY_SIZE(SignatureSchemeEcdsaSha384));
  Connect();
  CheckKeys(ssl_kea_ecdh, NamedGroupForEcdsa384(version_), ssl_auth_ecdsa,
            ssl_sig_ecdsa_secp384r1_sha384);
}

// In TLS 1.2, curve and hash aren't bound together.
TEST_P(TlsConnectTls12, SignatureSchemeCurveMismatch) {
  Reset(TlsAgent::kServerEcdsa256);
  client_->SetSignatureSchemes(SignatureSchemeEcdsaSha384,
                               PR_ARRAY_SIZE(SignatureSchemeEcdsaSha384));
  Connect();
}

// In TLS 1.3, curve and hash are coupled.
TEST_P(TlsConnectTls13, SignatureSchemeCurveMismatch) {
  Reset(TlsAgent::kServerEcdsa256);
  client_->SetSignatureSchemes(SignatureSchemeEcdsaSha384,
                               PR_ARRAY_SIZE(SignatureSchemeEcdsaSha384));
  ConnectExpectAlert(server_, kTlsAlertHandshakeFailure);
  server_->CheckErrorCode(SSL_ERROR_UNSUPPORTED_SIGNATURE_ALGORITHM);
  client_->CheckErrorCode(SSL_ERROR_NO_CYPHER_OVERLAP);
}

// Configuring a P-256 cert with only SHA-384 signatures is OK in TLS 1.2.
TEST_P(TlsConnectTls12, SignatureSchemeBadConfig) {
  Reset(TlsAgent::kServerEcdsa256);  // P-256 cert can't be used.
  server_->SetSignatureSchemes(SignatureSchemeEcdsaSha384,
                               PR_ARRAY_SIZE(SignatureSchemeEcdsaSha384));
  Connect();
}

// A P-256 certificate in TLS 1.3 needs a SHA-256 signature scheme.
TEST_P(TlsConnectTls13, SignatureSchemeBadConfig) {
  Reset(TlsAgent::kServerEcdsa256);  // P-256 cert can't be used.
  server_->SetSignatureSchemes(SignatureSchemeEcdsaSha384,
                               PR_ARRAY_SIZE(SignatureSchemeEcdsaSha384));
  ConnectExpectAlert(server_, kTlsAlertHandshakeFailure);
  server_->CheckErrorCode(SSL_ERROR_UNSUPPORTED_SIGNATURE_ALGORITHM);
  client_->CheckErrorCode(SSL_ERROR_NO_CYPHER_OVERLAP);
}

// Where there is no overlap on signature schemes, we still connect successfully
// if we aren't going to use a signature.
TEST_P(TlsConnectGenericPre13, SignatureAlgorithmNoOverlapStaticRsa) {
  client_->SetSignatureSchemes(SignatureSchemeRsaSha384,
                               PR_ARRAY_SIZE(SignatureSchemeRsaSha384));
  server_->SetSignatureSchemes(SignatureSchemeRsaSha256,
                               PR_ARRAY_SIZE(SignatureSchemeRsaSha256));
  EnableOnlyStaticRsaCiphers();
  Connect();
  CheckKeys(ssl_kea_rsa, ssl_auth_rsa_decrypt);
}

TEST_P(TlsConnectTls12Plus, SignatureAlgorithmNoOverlapEcdsa) {
  Reset(TlsAgent::kServerEcdsa256);
  client_->SetSignatureSchemes(SignatureSchemeEcdsaSha384,
                               PR_ARRAY_SIZE(SignatureSchemeEcdsaSha384));
  server_->SetSignatureSchemes(SignatureSchemeEcdsaSha256,
                               PR_ARRAY_SIZE(SignatureSchemeEcdsaSha256));
  ConnectExpectAlert(server_, kTlsAlertHandshakeFailure);
  client_->CheckErrorCode(SSL_ERROR_NO_CYPHER_OVERLAP);
  server_->CheckErrorCode(SSL_ERROR_UNSUPPORTED_SIGNATURE_ALGORITHM);
}

// Pre 1.2, a mismatch on signature algorithms shouldn't affect anything.
TEST_P(TlsConnectPre12, SignatureAlgorithmNoOverlapEcdsa) {
  Reset(TlsAgent::kServerEcdsa256);
  client_->SetSignatureSchemes(SignatureSchemeEcdsaSha384,
                               PR_ARRAY_SIZE(SignatureSchemeEcdsaSha384));
  server_->SetSignatureSchemes(SignatureSchemeEcdsaSha256,
                               PR_ARRAY_SIZE(SignatureSchemeEcdsaSha256));
  Connect();
}

// The signature_algorithms extension is mandatory in TLS 1.3.
TEST_P(TlsConnectTls13, SignatureAlgorithmDrop) {
  MakeTlsFilter<TlsExtensionDropper>(client_, ssl_signature_algorithms_xtn);
  ConnectExpectAlert(server_, kTlsAlertMissingExtension);
  client_->CheckErrorCode(SSL_ERROR_MISSING_EXTENSION_ALERT);
  server_->CheckErrorCode(SSL_ERROR_MISSING_SIGNATURE_ALGORITHMS_EXTENSION);
}

// TLS 1.2 has trouble detecting this sort of modification: it uses SHA1 and
// only fails when the Finished is checked.
TEST_P(TlsConnectTls12, SignatureAlgorithmDrop) {
  MakeTlsFilter<TlsExtensionDropper>(client_, ssl_signature_algorithms_xtn);
  ConnectExpectAlert(server_, kTlsAlertDecryptError);
  client_->CheckErrorCode(SSL_ERROR_DECRYPT_ERROR_ALERT);
  server_->CheckErrorCode(SSL_ERROR_BAD_HANDSHAKE_HASH_VALUE);
}

// Replaces the signature scheme in a TLS 1.3 CertificateVerify message.
class TlsReplaceSignatureSchemeFilter : public TlsHandshakeFilter {
 public:
  TlsReplaceSignatureSchemeFilter(const std::shared_ptr<TlsAgent>& a,
                                  SSLSignatureScheme scheme)
      : TlsHandshakeFilter(a, {kTlsHandshakeCertificateVerify}),
        scheme_(scheme) {
    EnableDecryption();
  }

 protected:
  virtual PacketFilter::Action FilterHandshake(const HandshakeHeader& header,
                                               const DataBuffer& input,
                                               DataBuffer* output) {
    *output = input;
    output->Write(0, scheme_, 2);
    return CHANGE;
  }

 private:
  SSLSignatureScheme scheme_;
};

TEST_P(TlsConnectTls13, UnsupportedSignatureSchemeAlert) {
  EnsureTlsSetup();
  MakeTlsFilter<TlsReplaceSignatureSchemeFilter>(server_, ssl_sig_none);

  ConnectExpectAlert(client_, kTlsAlertIllegalParameter);
  server_->CheckErrorCode(SSL_ERROR_ILLEGAL_PARAMETER_ALERT);
  client_->CheckErrorCode(SSL_ERROR_RX_MALFORMED_CERT_VERIFY);
}

TEST_P(TlsConnectTls13, InconsistentSignatureSchemeAlert) {
  EnsureTlsSetup();

  // This won't work because we use an RSA cert by default.
  MakeTlsFilter<TlsReplaceSignatureSchemeFilter>(
      server_, ssl_sig_ecdsa_secp256r1_sha256);

  ConnectExpectAlert(client_, kTlsAlertIllegalParameter);
  server_->CheckErrorCode(SSL_ERROR_ILLEGAL_PARAMETER_ALERT);
  client_->CheckErrorCode(SSL_ERROR_INCORRECT_SIGNATURE_ALGORITHM);
}

TEST_P(TlsConnectTls12Plus, RequestClientAuthWithSha384) {
  server_->SetSignatureSchemes(SignatureSchemeRsaSha384,
                               PR_ARRAY_SIZE(SignatureSchemeRsaSha384));
  server_->RequestClientAuth(false);
  Connect();
}

class BeforeFinished : public TlsRecordFilter {
 private:
  enum HandshakeState { BEFORE_CCS, AFTER_CCS, DONE };

 public:
  BeforeFinished(const std::shared_ptr<TlsAgent>& server,
                 const std::shared_ptr<TlsAgent>& client,
                 VoidFunction before_ccs, VoidFunction before_finished)
      : TlsRecordFilter(server),
        client_(client),
        before_ccs_(before_ccs),
        before_finished_(before_finished),
        state_(BEFORE_CCS) {}

 protected:
  virtual PacketFilter::Action FilterRecord(const TlsRecordHeader& header,
                                            const DataBuffer& body,
                                            DataBuffer* out) {
    switch (state_) {
      case BEFORE_CCS:
        // Awaken when we see the CCS.
        if (header.content_type() == kTlsChangeCipherSpecType) {
          before_ccs_();

          // Write the CCS out as a separate write, so that we can make
          // progress. Ordinarily, libssl sends the CCS and Finished together,
          // but that means that they both get processed together.
          DataBuffer ccs;
          header.Write(&ccs, 0, body);
          agent()->SendDirect(ccs);
          client_.lock()->Handshake();
          state_ = AFTER_CCS;
          // Request that the original record be dropped by the filter.
          return DROP;
        }
        break;

      case AFTER_CCS:
        EXPECT_EQ(kTlsHandshakeType, header.content_type());
        // This could check that data contains a Finished message, but it's
        // encrypted, so that's too much extra work.

        before_finished_();
        state_ = DONE;
        break;

      case DONE:
        break;
    }
    return KEEP;
  }

 private:
  std::weak_ptr<TlsAgent> client_;
  VoidFunction before_ccs_;
  VoidFunction before_finished_;
  HandshakeState state_;
};

// Running code after the client has started processing the encrypted part of
// the server's first flight, but before the Finished is processed is very hard
// in TLS 1.3.  These encrypted messages are sent in a single encrypted blob.
// The following test uses DTLS to make it possible to force the client to
// process the handshake in pieces.
//
// The first encrypted message from the server is dropped, and the MTU is
// reduced to just below the original message size so that the server sends two
// messages.  The Finished message is then processed separately.
class BeforeFinished13 : public PacketFilter {
 private:
  enum HandshakeState {
    INIT,
    BEFORE_FIRST_FRAGMENT,
    BEFORE_SECOND_FRAGMENT,
    DONE
  };

 public:
  BeforeFinished13(const std::shared_ptr<TlsAgent>& server,
                   const std::shared_ptr<TlsAgent>& client,
                   VoidFunction before_finished)
      : server_(server),
        client_(client),
        before_finished_(before_finished),
        records_(0) {}

 protected:
  virtual PacketFilter::Action Filter(const DataBuffer& input,
                                      DataBuffer* output) {
    switch (++records_) {
      case 1:
        // Packet 1 is the server's entire first flight.  Drop it.
        EXPECT_EQ(SECSuccess,
                  SSLInt_SetMTU(server_.lock()->ssl_fd(), input.len() - 1));
        return DROP;

      // Packet 2 is the first part of the server's retransmitted first
      // flight.  Keep that.

      case 3:
        // Packet 3 is the second part of the server's retransmitted first
        // flight.  Before passing that on, make sure that the client processes
        // packet 2, then call the before_finished_() callback.
        client_.lock()->Handshake();
        before_finished_();
        break;

      default:
        break;
    }
    return KEEP;
  }

 private:
  std::weak_ptr<TlsAgent> server_;
  std::weak_ptr<TlsAgent> client_;
  VoidFunction before_finished_;
  size_t records_;
};

static SECStatus AuthCompleteBlock(TlsAgent*, PRBool, PRBool) {
  return SECWouldBlock;
}

// This test uses an AuthCertificateCallback that blocks.  A filter is used to
// split the server's first flight into two pieces.  Before the second piece is
// processed by the client, SSL_AuthCertificateComplete() is called.
TEST_F(TlsConnectDatagram13, AuthCompleteBeforeFinished) {
  client_->SetAuthCertificateCallback(AuthCompleteBlock);
  MakeTlsFilter<BeforeFinished13>(server_, client_, [this]() {
    EXPECT_EQ(SECSuccess, SSL_AuthCertificateComplete(client_->ssl_fd(), 0));
  });
  Connect();
}

static void TriggerAuthComplete(PollTarget* target, Event event) {
  std::cerr << "client: call SSL_AuthCertificateComplete" << std::endl;
  EXPECT_EQ(TIMER_EVENT, event);
  TlsAgent* client = static_cast<TlsAgent*>(target);
  EXPECT_EQ(SECSuccess, SSL_AuthCertificateComplete(client->ssl_fd(), 0));
}

// This test uses a simple AuthCertificateCallback.  Due to the way that the
// entire server flight is processed, the call to SSL_AuthCertificateComplete
// will trigger after the Finished message is processed.
TEST_F(TlsConnectDatagram13, AuthCompleteAfterFinished) {
  client_->SetAuthCertificateCallback(
      [this](TlsAgent*, PRBool, PRBool) -> SECStatus {
        std::shared_ptr<Poller::Timer> timer_handle;
        // This is really just to unroll the stack.
        Poller::Instance()->SetTimer(1U, client_.get(), TriggerAuthComplete,
                                     &timer_handle);
        return SECWouldBlock;
      });
  Connect();
}

TEST_P(TlsConnectGenericPre13, ClientWriteBetweenCCSAndFinishedWithFalseStart) {
  client_->EnableFalseStart();
  MakeTlsFilter<BeforeFinished>(
      server_, client_,
      [this]() { EXPECT_TRUE(client_->can_falsestart_hook_called()); },
      [this]() {
        // Write something, which used to fail: bug 1235366.
        client_->SendData(10);
      });

  Connect();
  server_->SendData(10);
  Receive(10);
}

TEST_P(TlsConnectGenericPre13, AuthCompleteBeforeFinishedWithFalseStart) {
  client_->EnableFalseStart();
  client_->SetAuthCertificateCallback(AuthCompleteBlock);
  MakeTlsFilter<BeforeFinished>(
      server_, client_,
      []() {
        // Do nothing before CCS
      },
      [this]() {
        EXPECT_FALSE(client_->can_falsestart_hook_called());
        // AuthComplete before Finished still enables false start.
        EXPECT_EQ(SECSuccess,
                  SSL_AuthCertificateComplete(client_->ssl_fd(), 0));
        EXPECT_TRUE(client_->can_falsestart_hook_called());
        client_->SendData(10);
      });

  Connect();
  server_->SendData(10);
  Receive(10);
}

class EnforceNoActivity : public PacketFilter {
 protected:
  PacketFilter::Action Filter(const DataBuffer& input,
                              DataBuffer* output) override {
    std::cerr << "Unexpected packet: " << input << std::endl;
    EXPECT_TRUE(false) << "should not send anything";
    return KEEP;
  }
};

// In this test, we want to make sure that the server completes its handshake,
// but the client does not.  Because the AuthCertificate callback blocks and we
// never call SSL_AuthCertificateComplete(), the client should never report that
// it has completed the handshake.  Manually call Handshake(), alternating sides
// between client and server, until the desired state is reached.
TEST_P(TlsConnectGenericPre13, AuthCompleteDelayed) {
  client_->SetAuthCertificateCallback(AuthCompleteBlock);

  StartConnect();
  client_->Handshake();  // Send ClientHello
  server_->Handshake();  // Send ServerHello
  client_->Handshake();  // Send ClientKeyExchange and Finished
  server_->Handshake();  // Send Finished
  // The server should now report that it is connected
  EXPECT_EQ(TlsAgent::STATE_CONNECTED, server_->state());

  // The client should send nothing from here on.
  client_->SetFilter(std::make_shared<EnforceNoActivity>());
  client_->Handshake();
  EXPECT_EQ(TlsAgent::STATE_CONNECTING, client_->state());

  // This should allow the handshake to complete now.
  EXPECT_EQ(SECSuccess, SSL_AuthCertificateComplete(client_->ssl_fd(), 0));
  client_->Handshake();  // Transition to connected
  EXPECT_EQ(TlsAgent::STATE_CONNECTED, client_->state());
  EXPECT_EQ(TlsAgent::STATE_CONNECTED, server_->state());

  // Remove filter before closing or the close_notify alert will trigger it.
  client_->ClearFilter();
}

TEST_P(TlsConnectGenericPre13, AuthCompleteFailDelayed) {
  client_->SetAuthCertificateCallback(AuthCompleteBlock);

  StartConnect();
  client_->Handshake();  // Send ClientHello
  server_->Handshake();  // Send ServerHello
  client_->Handshake();  // Send ClientKeyExchange and Finished
  server_->Handshake();  // Send Finished
  // The server should now report that it is connected
  EXPECT_EQ(TlsAgent::STATE_CONNECTED, server_->state());

  // The client should send nothing from here on.
  client_->SetFilter(std::make_shared<EnforceNoActivity>());
  client_->Handshake();
  EXPECT_EQ(TlsAgent::STATE_CONNECTING, client_->state());

  // Report failure.
  client_->ClearFilter();
  client_->ExpectSendAlert(kTlsAlertBadCertificate);
  EXPECT_EQ(SECSuccess, SSL_AuthCertificateComplete(client_->ssl_fd(),
                                                    SSL_ERROR_BAD_CERTIFICATE));
  client_->Handshake();  // Fail
  EXPECT_EQ(TlsAgent::STATE_ERROR, client_->state());
}

// TLS 1.3 handles a delayed AuthComplete callback differently since the
// shape of the handshake is different.
TEST_P(TlsConnectTls13, AuthCompleteDelayed) {
  client_->SetAuthCertificateCallback(AuthCompleteBlock);

  StartConnect();
  client_->Handshake();  // Send ClientHello
  server_->Handshake();  // Send ServerHello
  EXPECT_EQ(TlsAgent::STATE_CONNECTING, client_->state());
  EXPECT_EQ(TlsAgent::STATE_CONNECTING, server_->state());

  // The client will send nothing until AuthCertificateComplete is called.
  client_->SetFilter(std::make_shared<EnforceNoActivity>());
  client_->Handshake();
  EXPECT_EQ(TlsAgent::STATE_CONNECTING, client_->state());

  // This should allow the handshake to complete now.
  client_->ClearFilter();
  EXPECT_EQ(SECSuccess, SSL_AuthCertificateComplete(client_->ssl_fd(), 0));
  client_->Handshake();  // Send Finished
  server_->Handshake();  // Transition to connected and send NewSessionTicket
  EXPECT_EQ(TlsAgent::STATE_CONNECTED, client_->state());
  EXPECT_EQ(TlsAgent::STATE_CONNECTED, server_->state());
}

TEST_P(TlsConnectTls13, AuthCompleteFailDelayed) {
  client_->SetAuthCertificateCallback(AuthCompleteBlock);

  StartConnect();
  client_->Handshake();  // Send ClientHello
  server_->Handshake();  // Send ServerHello
  EXPECT_EQ(TlsAgent::STATE_CONNECTING, client_->state());
  EXPECT_EQ(TlsAgent::STATE_CONNECTING, server_->state());

  // The client will send nothing until AuthCertificateComplete is called.
  client_->SetFilter(std::make_shared<EnforceNoActivity>());
  client_->Handshake();
  EXPECT_EQ(TlsAgent::STATE_CONNECTING, client_->state());

  // Report failure.
  client_->ClearFilter();
  ExpectAlert(client_, kTlsAlertBadCertificate);
  EXPECT_EQ(SECSuccess, SSL_AuthCertificateComplete(client_->ssl_fd(),
                                                    SSL_ERROR_BAD_CERTIFICATE));
  client_->Handshake();  // This should now fail.
  server_->Handshake();  // Get the error.
  EXPECT_EQ(TlsAgent::STATE_ERROR, client_->state());
  EXPECT_EQ(TlsAgent::STATE_ERROR, server_->state());
}

static SECStatus AuthCompleteFail(TlsAgent*, PRBool, PRBool) {
  PORT_SetError(SSL_ERROR_BAD_CERTIFICATE);
  return SECFailure;
}

TEST_P(TlsConnectGeneric, AuthFailImmediate) {
  client_->SetAuthCertificateCallback(AuthCompleteFail);

  StartConnect();
  ConnectExpectAlert(client_, kTlsAlertBadCertificate);
  client_->CheckErrorCode(SSL_ERROR_BAD_CERTIFICATE);
}

static const SSLExtraServerCertData ServerCertDataRsaPkcs1Decrypt = {
    ssl_auth_rsa_decrypt, nullptr, nullptr, nullptr};
static const SSLExtraServerCertData ServerCertDataRsaPkcs1Sign = {
    ssl_auth_rsa_sign, nullptr, nullptr, nullptr};
static const SSLExtraServerCertData ServerCertDataRsaPss = {
    ssl_auth_rsa_pss, nullptr, nullptr, nullptr};

// Test RSA cert with usage=[signature, encipherment].
TEST_F(TlsAgentStreamTestServer, ConfigureCertRsaPkcs1SignAndKEX) {
  Reset(TlsAgent::kServerRsa);

  PRFileDesc* ssl_fd = agent_->ssl_fd();
  EXPECT_TRUE(SSLInt_HasCertWithAuthType(ssl_fd, ssl_auth_rsa_decrypt));
  EXPECT_TRUE(SSLInt_HasCertWithAuthType(ssl_fd, ssl_auth_rsa_sign));
  EXPECT_TRUE(SSLInt_HasCertWithAuthType(ssl_fd, ssl_auth_rsa_pss));

  // Configuring for only rsa_sign, rsa_pss, or rsa_decrypt should work.
  EXPECT_TRUE(agent_->ConfigServerCert(TlsAgent::kServerRsa, false,
                                       &ServerCertDataRsaPkcs1Decrypt));
  EXPECT_TRUE(agent_->ConfigServerCert(TlsAgent::kServerRsa, false,
                                       &ServerCertDataRsaPkcs1Sign));
  EXPECT_TRUE(agent_->ConfigServerCert(TlsAgent::kServerRsa, false,
                                       &ServerCertDataRsaPss));
}

// Test RSA cert with usage=[signature].
TEST_F(TlsAgentStreamTestServer, ConfigureCertRsaPkcs1Sign) {
  Reset(TlsAgent::kServerRsaSign);

  PRFileDesc* ssl_fd = agent_->ssl_fd();
  EXPECT_FALSE(SSLInt_HasCertWithAuthType(ssl_fd, ssl_auth_rsa_decrypt));
  EXPECT_TRUE(SSLInt_HasCertWithAuthType(ssl_fd, ssl_auth_rsa_sign));
  EXPECT_TRUE(SSLInt_HasCertWithAuthType(ssl_fd, ssl_auth_rsa_pss));

  // Configuring for only rsa_decrypt should fail.
  EXPECT_FALSE(agent_->ConfigServerCert(TlsAgent::kServerRsaSign, false,
                                        &ServerCertDataRsaPkcs1Decrypt));

  // Configuring for only rsa_sign or rsa_pss should work.
  EXPECT_TRUE(agent_->ConfigServerCert(TlsAgent::kServerRsaSign, false,
                                       &ServerCertDataRsaPkcs1Sign));
  EXPECT_TRUE(agent_->ConfigServerCert(TlsAgent::kServerRsaSign, false,
                                       &ServerCertDataRsaPss));
}

// Test RSA cert with usage=[encipherment].
TEST_F(TlsAgentStreamTestServer, ConfigureCertRsaPkcs1KEX) {
  Reset(TlsAgent::kServerRsaDecrypt);

  PRFileDesc* ssl_fd = agent_->ssl_fd();
  EXPECT_TRUE(SSLInt_HasCertWithAuthType(ssl_fd, ssl_auth_rsa_decrypt));
  EXPECT_FALSE(SSLInt_HasCertWithAuthType(ssl_fd, ssl_auth_rsa_sign));
  EXPECT_FALSE(SSLInt_HasCertWithAuthType(ssl_fd, ssl_auth_rsa_pss));

  // Configuring for only rsa_sign or rsa_pss should fail.
  EXPECT_FALSE(agent_->ConfigServerCert(TlsAgent::kServerRsaDecrypt, false,
                                        &ServerCertDataRsaPkcs1Sign));
  EXPECT_FALSE(agent_->ConfigServerCert(TlsAgent::kServerRsaDecrypt, false,
                                        &ServerCertDataRsaPss));

  // Configuring for only rsa_decrypt should work.
  EXPECT_TRUE(agent_->ConfigServerCert(TlsAgent::kServerRsaDecrypt, false,
                                       &ServerCertDataRsaPkcs1Decrypt));
}

// Test configuring an RSA-PSS cert.
TEST_F(TlsAgentStreamTestServer, ConfigureCertRsaPss) {
  Reset(TlsAgent::kServerRsaPss);

  PRFileDesc* ssl_fd = agent_->ssl_fd();
  EXPECT_FALSE(SSLInt_HasCertWithAuthType(ssl_fd, ssl_auth_rsa_decrypt));
  EXPECT_FALSE(SSLInt_HasCertWithAuthType(ssl_fd, ssl_auth_rsa_sign));
  EXPECT_TRUE(SSLInt_HasCertWithAuthType(ssl_fd, ssl_auth_rsa_pss));

  // Configuring for only rsa_sign or rsa_decrypt should fail.
  EXPECT_FALSE(agent_->ConfigServerCert(TlsAgent::kServerRsaPss, false,
                                        &ServerCertDataRsaPkcs1Sign));
  EXPECT_FALSE(agent_->ConfigServerCert(TlsAgent::kServerRsaPss, false,
                                        &ServerCertDataRsaPkcs1Decrypt));

  // Configuring for only rsa_pss should work.
  EXPECT_TRUE(agent_->ConfigServerCert(TlsAgent::kServerRsaPss, false,
                                       &ServerCertDataRsaPss));
}

// variant, version, certificate, auth type, signature scheme
typedef std::tuple<SSLProtocolVariant, uint16_t, std::string, SSLAuthType,
                   SSLSignatureScheme>
    SignatureSchemeProfile;

class TlsSignatureSchemeConfiguration
    : public TlsConnectTestBase,
      public ::testing::WithParamInterface<SignatureSchemeProfile> {
 public:
  TlsSignatureSchemeConfiguration()
      : TlsConnectTestBase(std::get<0>(GetParam()), std::get<1>(GetParam())),
        certificate_(std::get<2>(GetParam())),
        auth_type_(std::get<3>(GetParam())),
        signature_scheme_(std::get<4>(GetParam())) {}

 protected:
  void TestSignatureSchemeConfig(std::shared_ptr<TlsAgent>& configPeer) {
    EnsureTlsSetup();
    configPeer->SetSignatureSchemes(&signature_scheme_, 1);
    Connect();
    CheckKeys(ssl_kea_ecdh, ssl_grp_ec_curve25519, auth_type_,
              signature_scheme_);
  }

  std::string certificate_;
  SSLAuthType auth_type_;
  SSLSignatureScheme signature_scheme_;
};

TEST_P(TlsSignatureSchemeConfiguration, SignatureSchemeConfigServer) {
  Reset(certificate_);
  TestSignatureSchemeConfig(server_);
}

TEST_P(TlsSignatureSchemeConfiguration, SignatureSchemeConfigClient) {
  Reset(certificate_);
  auto capture =
      MakeTlsFilter<TlsExtensionCapture>(client_, ssl_signature_algorithms_xtn);
  TestSignatureSchemeConfig(client_);

  const DataBuffer& ext = capture->extension();
  ASSERT_EQ(2U + 2U, ext.len());
  uint32_t v = 0;
  ASSERT_TRUE(ext.Read(0, 2, &v));
  EXPECT_EQ(2U, v);
  ASSERT_TRUE(ext.Read(2, 2, &v));
  EXPECT_EQ(signature_scheme_, static_cast<SSLSignatureScheme>(v));
}

TEST_P(TlsSignatureSchemeConfiguration, SignatureSchemeConfigBoth) {
  Reset(certificate_);
  EnsureTlsSetup();
  client_->SetSignatureSchemes(&signature_scheme_, 1);
  server_->SetSignatureSchemes(&signature_scheme_, 1);
  Connect();
  CheckKeys(ssl_kea_ecdh, ssl_grp_ec_curve25519, auth_type_, signature_scheme_);
}

INSTANTIATE_TEST_CASE_P(
    SignatureSchemeRsa, TlsSignatureSchemeConfiguration,
    ::testing::Combine(
        TlsConnectTestBase::kTlsVariantsAll, TlsConnectTestBase::kTlsV12Plus,
        ::testing::Values(TlsAgent::kServerRsaSign),
        ::testing::Values(ssl_auth_rsa_sign),
        ::testing::Values(ssl_sig_rsa_pkcs1_sha256, ssl_sig_rsa_pkcs1_sha384,
                          ssl_sig_rsa_pkcs1_sha512, ssl_sig_rsa_pss_rsae_sha256,
                          ssl_sig_rsa_pss_rsae_sha384)));
// PSS with SHA-512 needs a bigger key to work.
INSTANTIATE_TEST_CASE_P(
    SignatureSchemeBigRsa, TlsSignatureSchemeConfiguration,
    ::testing::Combine(TlsConnectTestBase::kTlsVariantsAll,
                       TlsConnectTestBase::kTlsV12Plus,
                       ::testing::Values(TlsAgent::kRsa2048),
                       ::testing::Values(ssl_auth_rsa_sign),
                       ::testing::Values(ssl_sig_rsa_pss_rsae_sha512)));
INSTANTIATE_TEST_CASE_P(
    SignatureSchemeRsaSha1, TlsSignatureSchemeConfiguration,
    ::testing::Combine(TlsConnectTestBase::kTlsVariantsAll,
                       TlsConnectTestBase::kTlsV12,
                       ::testing::Values(TlsAgent::kServerRsa),
                       ::testing::Values(ssl_auth_rsa_sign),
                       ::testing::Values(ssl_sig_rsa_pkcs1_sha1)));
INSTANTIATE_TEST_CASE_P(
    SignatureSchemeEcdsaP256, TlsSignatureSchemeConfiguration,
    ::testing::Combine(TlsConnectTestBase::kTlsVariantsAll,
                       TlsConnectTestBase::kTlsV12Plus,
                       ::testing::Values(TlsAgent::kServerEcdsa256),
                       ::testing::Values(ssl_auth_ecdsa),
                       ::testing::Values(ssl_sig_ecdsa_secp256r1_sha256)));
INSTANTIATE_TEST_CASE_P(
    SignatureSchemeEcdsaP384, TlsSignatureSchemeConfiguration,
    ::testing::Combine(TlsConnectTestBase::kTlsVariantsAll,
                       TlsConnectTestBase::kTlsV12Plus,
                       ::testing::Values(TlsAgent::kServerEcdsa384),
                       ::testing::Values(ssl_auth_ecdsa),
                       ::testing::Values(ssl_sig_ecdsa_secp384r1_sha384)));
INSTANTIATE_TEST_CASE_P(
    SignatureSchemeEcdsaP521, TlsSignatureSchemeConfiguration,
    ::testing::Combine(TlsConnectTestBase::kTlsVariantsAll,
                       TlsConnectTestBase::kTlsV12Plus,
                       ::testing::Values(TlsAgent::kServerEcdsa521),
                       ::testing::Values(ssl_auth_ecdsa),
                       ::testing::Values(ssl_sig_ecdsa_secp521r1_sha512)));
INSTANTIATE_TEST_CASE_P(
    SignatureSchemeEcdsaSha1, TlsSignatureSchemeConfiguration,
    ::testing::Combine(TlsConnectTestBase::kTlsVariantsAll,
                       TlsConnectTestBase::kTlsV12,
                       ::testing::Values(TlsAgent::kServerEcdsa256,
                                         TlsAgent::kServerEcdsa384),
                       ::testing::Values(ssl_auth_ecdsa),
                       ::testing::Values(ssl_sig_ecdsa_sha1)));
}  // namespace nss_test