summaryrefslogtreecommitdiffstats
path: root/security/nss/lib/ssl/sslsecur.c
blob: 14320fa1908c104e38b2fbd88c72e8929948508d (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
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
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
 * Various SSL functions.
 *
 * 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 "cert.h"
#include "secitem.h"
#include "keyhi.h"
#include "ssl.h"
#include "sslimpl.h"
#include "sslproto.h"
#include "secoid.h"   /* for SECOID_GetALgorithmTag */
#include "pk11func.h" /* for PK11_GenerateRandom */
#include "nss.h"      /* for NSS_RegisterShutdown */
#include "prinit.h"   /* for PR_CallOnceWithArg */

/* Step through the handshake functions.
 *
 * Called from: SSL_ForceHandshake  (below),
 *              ssl_SecureRecv      (below) and
 *              ssl_SecureSend      (below)
 *    from: WaitForResponse     in sslsocks.c
 *          ssl_SocksRecv       in sslsocks.c
 *              ssl_SocksSend       in sslsocks.c
 *
 * Caller must hold the (write) handshakeLock.
 */
SECStatus
ssl_Do1stHandshake(sslSocket *ss)
{
    SECStatus rv = SECSuccess;

    while (ss->handshake && rv == SECSuccess) {
        PORT_Assert(ss->opt.noLocks || ssl_Have1stHandshakeLock(ss));
        PORT_Assert(ss->opt.noLocks || !ssl_HaveRecvBufLock(ss));
        PORT_Assert(ss->opt.noLocks || !ssl_HaveXmitBufLock(ss));
        PORT_Assert(ss->opt.noLocks || !ssl_HaveSSL3HandshakeLock(ss));

        rv = (*ss->handshake)(ss);
    };

    PORT_Assert(ss->opt.noLocks || !ssl_HaveRecvBufLock(ss));
    PORT_Assert(ss->opt.noLocks || !ssl_HaveXmitBufLock(ss));
    PORT_Assert(ss->opt.noLocks || !ssl_HaveSSL3HandshakeLock(ss));

    return rv;
}

void
ssl_FinishHandshake(sslSocket *ss)
{
    PORT_Assert(ss->opt.noLocks || ssl_Have1stHandshakeLock(ss));
    PORT_Assert(ss->opt.noLocks || ssl_HaveRecvBufLock(ss));

    SSL_TRC(3, ("%d: SSL[%d]: handshake is completed", SSL_GETPID(), ss->fd));

    ss->firstHsDone = PR_TRUE;
    ss->enoughFirstHsDone = PR_TRUE;
    ss->gs.writeOffset = 0;
    ss->gs.readOffset = 0;

    if (ss->handshakeCallback) {
        PORT_Assert((ss->ssl3.hs.preliminaryInfo & ssl_preinfo_all) ==
                    ssl_preinfo_all);
        (ss->handshakeCallback)(ss->fd, ss->handshakeCallbackData);
    }

    ssl_FreeEphemeralKeyPairs(ss);
}

/*
 * Handshake function that blocks.  Used to force a
 * retry on a connection on the next read/write.
 */
static SECStatus
ssl3_AlwaysBlock(sslSocket *ss)
{
    PORT_SetError(PR_WOULD_BLOCK_ERROR);
    return SECFailure;
}

/*
 * set the initial handshake state machine to block
 */
void
ssl3_SetAlwaysBlock(sslSocket *ss)
{
    if (!ss->firstHsDone) {
        ss->handshake = ssl3_AlwaysBlock;
    }
}

static SECStatus
ssl_SetTimeout(PRFileDesc *fd, PRIntervalTime timeout)
{
    sslSocket *ss;

    ss = ssl_FindSocket(fd);
    if (!ss) {
        SSL_DBG(("%d: SSL[%d]: bad socket in SetTimeout", SSL_GETPID(), fd));
        return SECFailure;
    }
    SSL_LOCK_READER(ss);
    ss->rTimeout = timeout;
    if (ss->opt.fdx) {
        SSL_LOCK_WRITER(ss);
    }
    ss->wTimeout = timeout;
    if (ss->opt.fdx) {
        SSL_UNLOCK_WRITER(ss);
    }
    SSL_UNLOCK_READER(ss);
    return SECSuccess;
}

/* Acquires and releases HandshakeLock.
*/
SECStatus
SSL_ResetHandshake(PRFileDesc *s, PRBool asServer)
{
    sslSocket *ss;
    SECStatus status;
    PRNetAddr addr;

    ss = ssl_FindSocket(s);
    if (!ss) {
        SSL_DBG(("%d: SSL[%d]: bad socket in ResetHandshake", SSL_GETPID(), s));
        return SECFailure;
    }

    /* Don't waste my time */
    if (!ss->opt.useSecurity)
        return SECSuccess;

    SSL_LOCK_READER(ss);
    SSL_LOCK_WRITER(ss);

    /* Reset handshake state */
    ssl_Get1stHandshakeLock(ss);

    ss->firstHsDone = PR_FALSE;
    ss->enoughFirstHsDone = PR_FALSE;
    if (asServer) {
        ss->handshake = ssl_BeginServerHandshake;
        ss->handshaking = sslHandshakingAsServer;
    } else {
        ss->handshake = ssl_BeginClientHandshake;
        ss->handshaking = sslHandshakingAsClient;
    }

    ssl_GetRecvBufLock(ss);
    status = ssl3_InitGather(&ss->gs);
    ssl_ReleaseRecvBufLock(ss);
    if (status != SECSuccess)
        goto loser;

    ssl_GetSSL3HandshakeLock(ss);
    ss->ssl3.hs.canFalseStart = PR_FALSE;
    ss->ssl3.hs.restartTarget = NULL;

    /*
    ** Blow away old security state and get a fresh setup.
    */
    ssl_GetXmitBufLock(ss);
    ssl_ResetSecurityInfo(&ss->sec, PR_TRUE);
    status = ssl_CreateSecurityInfo(ss);
    ssl_ReleaseXmitBufLock(ss);

    ssl_ReleaseSSL3HandshakeLock(ss);
    ssl_Release1stHandshakeLock(ss);

    ssl3_DestroyRemoteExtensions(&ss->ssl3.hs.remoteExtensions);
    ssl3_ResetExtensionData(&ss->xtnData, ss);

    if (!ss->TCPconnected)
        ss->TCPconnected = (PR_SUCCESS == ssl_DefGetpeername(ss, &addr));

loser:
    SSL_UNLOCK_WRITER(ss);
    SSL_UNLOCK_READER(ss);

    return status;
}

/* For SSLv2, does nothing but return an error.
** For SSLv3, flushes SID cache entry (if requested),
** and then starts new client hello or hello request.
** Acquires and releases HandshakeLock.
*/
SECStatus
SSL_ReHandshake(PRFileDesc *fd, PRBool flushCache)
{
    sslSocket *ss;
    SECStatus rv;

    ss = ssl_FindSocket(fd);
    if (!ss) {
        SSL_DBG(("%d: SSL[%d]: bad socket in RedoHandshake", SSL_GETPID(), fd));
        return SECFailure;
    }

    if (!ss->opt.useSecurity)
        return SECSuccess;

    ssl_Get1stHandshakeLock(ss);

    ssl_GetSSL3HandshakeLock(ss);
    rv = ssl3_RedoHandshake(ss, flushCache); /* force full handshake. */
    ssl_ReleaseSSL3HandshakeLock(ss);

    ssl_Release1stHandshakeLock(ss);

    return rv;
}

/*
** Same as above, but with an I/O timeout.
 */
SSL_IMPORT SECStatus
SSL_ReHandshakeWithTimeout(PRFileDesc *fd,
                           PRBool flushCache,
                           PRIntervalTime timeout)
{
    if (SECSuccess != ssl_SetTimeout(fd, timeout)) {
        return SECFailure;
    }
    return SSL_ReHandshake(fd, flushCache);
}

SECStatus
SSL_RedoHandshake(PRFileDesc *fd)
{
    return SSL_ReHandshake(fd, PR_TRUE);
}

/* Register an application callback to be called when SSL handshake completes.
** Acquires and releases HandshakeLock.
*/
SECStatus
SSL_HandshakeCallback(PRFileDesc *fd, SSLHandshakeCallback cb,
                      void *client_data)
{
    sslSocket *ss;

    ss = ssl_FindSocket(fd);
    if (!ss) {
        SSL_DBG(("%d: SSL[%d]: bad socket in HandshakeCallback",
                 SSL_GETPID(), fd));
        return SECFailure;
    }

    if (!ss->opt.useSecurity) {
        PORT_SetError(SEC_ERROR_INVALID_ARGS);
        return SECFailure;
    }

    ssl_Get1stHandshakeLock(ss);
    ssl_GetSSL3HandshakeLock(ss);

    ss->handshakeCallback = cb;
    ss->handshakeCallbackData = client_data;

    ssl_ReleaseSSL3HandshakeLock(ss);
    ssl_Release1stHandshakeLock(ss);

    return SECSuccess;
}

/* Register an application callback to be called when false start may happen.
** Acquires and releases HandshakeLock.
*/
SECStatus
SSL_SetCanFalseStartCallback(PRFileDesc *fd, SSLCanFalseStartCallback cb,
                             void *arg)
{
    sslSocket *ss;

    ss = ssl_FindSocket(fd);
    if (!ss) {
        SSL_DBG(("%d: SSL[%d]: bad socket in SSL_SetCanFalseStartCallback",
                 SSL_GETPID(), fd));
        return SECFailure;
    }

    if (!ss->opt.useSecurity) {
        PORT_SetError(SEC_ERROR_INVALID_ARGS);
        return SECFailure;
    }

    ssl_Get1stHandshakeLock(ss);
    ssl_GetSSL3HandshakeLock(ss);

    ss->canFalseStartCallback = cb;
    ss->canFalseStartCallbackData = arg;

    ssl_ReleaseSSL3HandshakeLock(ss);
    ssl_Release1stHandshakeLock(ss);

    return SECSuccess;
}

SECStatus
SSL_RecommendedCanFalseStart(PRFileDesc *fd, PRBool *canFalseStart)
{
    sslSocket *ss;

    *canFalseStart = PR_FALSE;
    ss = ssl_FindSocket(fd);
    if (!ss) {
        SSL_DBG(("%d: SSL[%d]: bad socket in SSL_RecommendedCanFalseStart",
                 SSL_GETPID(), fd));
        return SECFailure;
    }

    /* Require a forward-secret key exchange. */
    *canFalseStart = ss->ssl3.hs.kea_def->kea == kea_dhe_dss ||
                     ss->ssl3.hs.kea_def->kea == kea_dhe_rsa ||
                     ss->ssl3.hs.kea_def->kea == kea_ecdhe_ecdsa ||
                     ss->ssl3.hs.kea_def->kea == kea_ecdhe_rsa;

    return SECSuccess;
}

/* Try to make progress on an SSL handshake by attempting to read the
** next handshake from the peer, and sending any responses.
** For non-blocking sockets, returns PR_ERROR_WOULD_BLOCK  if it cannot
** read the next handshake from the underlying socket.
** Returns when handshake is complete, or application data has
** arrived that must be taken by application before handshake can continue,
** or a fatal error occurs.
** Application should use handshake completion callback to tell which.
*/
SECStatus
SSL_ForceHandshake(PRFileDesc *fd)
{
    sslSocket *ss;
    SECStatus rv = SECFailure;

    ss = ssl_FindSocket(fd);
    if (!ss) {
        SSL_DBG(("%d: SSL[%d]: bad socket in ForceHandshake",
                 SSL_GETPID(), fd));
        return rv;
    }

    /* Don't waste my time */
    if (!ss->opt.useSecurity)
        return SECSuccess;

    if (!ssl_SocketIsBlocking(ss)) {
        ssl_GetXmitBufLock(ss);
        if (ss->pendingBuf.len != 0) {
            int sent = ssl_SendSavedWriteData(ss);
            if ((sent < 0) && (PORT_GetError() != PR_WOULD_BLOCK_ERROR)) {
                ssl_ReleaseXmitBufLock(ss);
                return SECFailure;
            }
        }
        ssl_ReleaseXmitBufLock(ss);
    }

    ssl_Get1stHandshakeLock(ss);

    if (ss->version >= SSL_LIBRARY_VERSION_3_0) {
        int gatherResult;

        ssl_GetRecvBufLock(ss);
        gatherResult = ssl3_GatherCompleteHandshake(ss, 0);
        ssl_ReleaseRecvBufLock(ss);
        if (gatherResult > 0) {
            rv = SECSuccess;
        } else {
            if (gatherResult == 0) {
                PORT_SetError(PR_END_OF_FILE_ERROR);
            }
            /* We can rely on ssl3_GatherCompleteHandshake to set
             * PR_WOULD_BLOCK_ERROR as needed here. */
            rv = SECFailure;
        }
    } else {
        PORT_Assert(!ss->firstHsDone);
        rv = ssl_Do1stHandshake(ss);
    }

    ssl_Release1stHandshakeLock(ss);

    return rv;
}

/*
 ** Same as above, but with an I/O timeout.
 */
SSL_IMPORT SECStatus
SSL_ForceHandshakeWithTimeout(PRFileDesc *fd,
                              PRIntervalTime timeout)
{
    if (SECSuccess != ssl_SetTimeout(fd, timeout)) {
        return SECFailure;
    }
    return SSL_ForceHandshake(fd);
}

/************************************************************************/

/*
** Save away write data that is trying to be written before the security
** handshake has been completed. When the handshake is completed, we will
** flush this data out.
** Caller must hold xmitBufLock
*/
SECStatus
ssl_SaveWriteData(sslSocket *ss, const void *data, unsigned int len)
{
    SECStatus rv;

    PORT_Assert(ss->opt.noLocks || ssl_HaveXmitBufLock(ss));
    rv = sslBuffer_Append(&ss->pendingBuf, data, len);
    SSL_TRC(5, ("%d: SSL[%d]: saving %u bytes of data (%u total saved so far)",
                SSL_GETPID(), ss->fd, len, ss->pendingBuf.len));
    return rv;
}

/*
** Send saved write data. This will flush out data sent prior to a
** complete security handshake. Hopefully there won't be too much of it.
** Returns count of the bytes sent, NOT a SECStatus.
** Caller must hold xmitBufLock
*/
int
ssl_SendSavedWriteData(sslSocket *ss)
{
    int rv = 0;

    PORT_Assert(ss->opt.noLocks || ssl_HaveXmitBufLock(ss));
    if (ss->pendingBuf.len != 0) {
        SSL_TRC(5, ("%d: SSL[%d]: sending %d bytes of saved data",
                    SSL_GETPID(), ss->fd, ss->pendingBuf.len));
        rv = ssl_DefSend(ss, ss->pendingBuf.buf, ss->pendingBuf.len, 0);
        if (rv < 0) {
            return rv;
        }
        ss->pendingBuf.len -= rv;
        if (ss->pendingBuf.len > 0 && rv > 0) {
            /* UGH !! This shifts the whole buffer down by copying it */
            PORT_Memmove(ss->pendingBuf.buf, ss->pendingBuf.buf + rv,
                         ss->pendingBuf.len);
        }
    }
    return rv;
}

/************************************************************************/

/*
** Receive some application data on a socket.  Reads SSL records from the input
** stream, decrypts them and then copies them to the output buffer.
** Called from ssl_SecureRecv() below.
**
** Caller does NOT hold 1stHandshakeLock because that handshake is over.
** Caller doesn't call this until initial handshake is complete.
** The call to ssl3_GatherAppDataRecord may encounter handshake
** messages from a subsequent handshake.
**
** This code is similar to, and easily confused with,
**   ssl_GatherRecord1stHandshake() in sslcon.c
*/
static int
DoRecv(sslSocket *ss, unsigned char *out, int len, int flags)
{
    int rv;
    int amount;
    int available;

    /* ssl3_GatherAppDataRecord may call ssl_FinishHandshake, which needs the
     * 1stHandshakeLock. */
    ssl_Get1stHandshakeLock(ss);
    ssl_GetRecvBufLock(ss);

    available = ss->gs.writeOffset - ss->gs.readOffset;
    if (available == 0) {
        /* Wait for application data to arrive.  */
        rv = ssl3_GatherAppDataRecord(ss, 0);
        if (rv <= 0) {
            if (rv == 0) {
                /* EOF */
                SSL_TRC(10, ("%d: SSL[%d]: ssl_recv EOF",
                             SSL_GETPID(), ss->fd));
                goto done;
            }
            if (PR_GetError() != PR_WOULD_BLOCK_ERROR) {
                /* Some random error */
                goto done;
            }

            /*
            ** Gather record is blocked waiting for more record data to
            ** arrive. Try to process what we have already received
            */
        } else {
            /* Gather record has finished getting a complete record */
        }

        /* See if any clear data is now available */
        available = ss->gs.writeOffset - ss->gs.readOffset;
        if (available == 0) {
            /*
            ** No partial data is available. Force error code to
            ** EWOULDBLOCK so that caller will try again later. Note
            ** that the error code is probably EWOULDBLOCK already,
            ** but if it isn't (for example, if we received a zero
            ** length record) then this will force it to be correct.
            */
            PORT_SetError(PR_WOULD_BLOCK_ERROR);
            rv = SECFailure;
            goto done;
        }
        SSL_TRC(30, ("%d: SSL[%d]: partial data ready, available=%d",
                     SSL_GETPID(), ss->fd, available));
    }

    if (IS_DTLS(ss) && (len < available)) {
        /* DTLS does not allow you to do partial reads */
        SSL_TRC(30, ("%d: SSL[%d]: DTLS short read. len=%d available=%d",
                     SSL_GETPID(), ss->fd, len, available));
        ss->gs.readOffset += available;
        PORT_SetError(SSL_ERROR_RX_SHORT_DTLS_READ);
        rv = SECFailure;
        goto done;
    }

    /* Dole out clear data to reader */
    amount = PR_MIN(len, available);
    PORT_Memcpy(out, ss->gs.buf.buf + ss->gs.readOffset, amount);
    if (!(flags & PR_MSG_PEEK)) {
        ss->gs.readOffset += amount;
    }
    PORT_Assert(ss->gs.readOffset <= ss->gs.writeOffset);
    rv = amount;

    SSL_TRC(30, ("%d: SSL[%d]: amount=%d available=%d",
                 SSL_GETPID(), ss->fd, amount, available));
    PRINT_BUF(4, (ss, "DoRecv receiving plaintext:", out, amount));

done:
    ssl_ReleaseRecvBufLock(ss);
    ssl_Release1stHandshakeLock(ss);
    return rv;
}

/************************************************************************/

SECStatus
ssl_CreateSecurityInfo(sslSocket *ss)
{
    SECStatus status;

    ssl_GetXmitBufLock(ss);
    status = sslBuffer_Grow(&ss->sec.writeBuf, 4096);
    ssl_ReleaseXmitBufLock(ss);

    return status;
}

SECStatus
ssl_CopySecurityInfo(sslSocket *ss, sslSocket *os)
{
    ss->sec.isServer = os->sec.isServer;

    ss->sec.peerCert = CERT_DupCertificate(os->sec.peerCert);
    if (os->sec.peerCert && !ss->sec.peerCert)
        goto loser;

    return SECSuccess;

loser:
    return SECFailure;
}

/* Reset sec back to its initial state.
** Caller holds any relevant locks.
*/
void
ssl_ResetSecurityInfo(sslSecurityInfo *sec, PRBool doMemset)
{
    if (sec->localCert) {
        CERT_DestroyCertificate(sec->localCert);
        sec->localCert = NULL;
    }
    if (sec->peerCert) {
        CERT_DestroyCertificate(sec->peerCert);
        sec->peerCert = NULL;
    }
    if (sec->peerKey) {
        SECKEY_DestroyPublicKey(sec->peerKey);
        sec->peerKey = NULL;
    }

    /* cleanup the ci */
    if (sec->ci.sid != NULL) {
        ssl_FreeSID(sec->ci.sid);
    }
    PORT_ZFree(sec->ci.sendBuf.buf, sec->ci.sendBuf.space);
    if (doMemset) {
        memset(&sec->ci, 0, sizeof sec->ci);
    }
}

/*
** Called from SSL_ResetHandshake (above), and
**        from ssl_FreeSocket     in sslsock.c
** Caller should hold relevant locks (e.g. XmitBufLock)
*/
void
ssl_DestroySecurityInfo(sslSecurityInfo *sec)
{
    ssl_ResetSecurityInfo(sec, PR_FALSE);

    PORT_ZFree(sec->writeBuf.buf, sec->writeBuf.space);
    sec->writeBuf.buf = 0;

    memset(sec, 0, sizeof *sec);
}

/************************************************************************/

int
ssl_SecureConnect(sslSocket *ss, const PRNetAddr *sa)
{
    PRFileDesc *osfd = ss->fd->lower;
    int rv;

    if (ss->opt.handshakeAsServer) {
        ss->handshake = ssl_BeginServerHandshake;
        ss->handshaking = sslHandshakingAsServer;
    } else {
        ss->handshake = ssl_BeginClientHandshake;
        ss->handshaking = sslHandshakingAsClient;
    }

    /* connect to server */
    rv = osfd->methods->connect(osfd, sa, ss->cTimeout);
    if (rv == PR_SUCCESS) {
        ss->TCPconnected = 1;
    } else {
        int err = PR_GetError();
        SSL_DBG(("%d: SSL[%d]: connect failed, errno=%d",
                 SSL_GETPID(), ss->fd, err));
        if (err == PR_IS_CONNECTED_ERROR) {
            ss->TCPconnected = 1;
        }
    }

    SSL_TRC(5, ("%d: SSL[%d]: secure connect completed, rv == %d",
                SSL_GETPID(), ss->fd, rv));
    return rv;
}

/*
 * Also, in the unlikely event that the TCP pipe is full and the peer stops
 * reading, the SSL3_SendAlert call in ssl_SecureClose and ssl_SecureShutdown
 * may block indefinitely in blocking mode, and may fail (without retrying)
 * in non-blocking mode.
 */

int
ssl_SecureClose(sslSocket *ss)
{
    int rv;

    if (!(ss->shutdownHow & ssl_SHUTDOWN_SEND) &&
        ss->firstHsDone) {

        /* We don't want the final alert to be Nagle delayed. */
        if (!ss->delayDisabled) {
            ssl_EnableNagleDelay(ss, PR_FALSE);
            ss->delayDisabled = 1;
        }

        (void)SSL3_SendAlert(ss, alert_warning, close_notify);
    }
    rv = ssl_DefClose(ss);
    return rv;
}

/* Caller handles all locking */
int
ssl_SecureShutdown(sslSocket *ss, int nsprHow)
{
    PRFileDesc *osfd = ss->fd->lower;
    int rv;
    PRIntn sslHow = nsprHow + 1;

    if ((unsigned)nsprHow > PR_SHUTDOWN_BOTH) {
        PORT_SetError(PR_INVALID_ARGUMENT_ERROR);
        return PR_FAILURE;
    }

    if ((sslHow & ssl_SHUTDOWN_SEND) != 0 &&
        !(ss->shutdownHow & ssl_SHUTDOWN_SEND) &&
        ss->firstHsDone) {

        (void)SSL3_SendAlert(ss, alert_warning, close_notify);
    }

    rv = osfd->methods->shutdown(osfd, nsprHow);

    ss->shutdownHow |= sslHow;

    return rv;
}

/************************************************************************/

static SECStatus
tls13_CheckKeyUpdate(sslSocket *ss, SSLSecretDirection dir)
{
    PRBool keyUpdate;
    ssl3CipherSpec *spec;
    sslSequenceNumber seqNum;
    sslSequenceNumber margin;
    tls13KeyUpdateRequest keyUpdateRequest;
    SECStatus rv = SECSuccess;

    /* Bug 1413368: enable for DTLS */
    if (ss->version < SSL_LIBRARY_VERSION_TLS_1_3 || IS_DTLS(ss)) {
        return SECSuccess;
    }

    /* If both sides update at the same number, then this will cause two updates
     * to happen at once. The problem is that the KeyUpdate itself consumes a
     * sequence number, and that will trigger the reading side to request an
     * update.
     *
     * If we have the writing side update first, the writer will be the one that
     * drives the update.  An update by the writer doesn't need a response, so
     * it is more efficient overall.  The margins here are pretty arbitrary, but
     * having the write margin larger reduces the number of times that a
     * KeyUpdate is sent by a reader. */
    ssl_GetSpecReadLock(ss);
    if (dir == ssl_secret_read) {
        spec = ss->ssl3.crSpec;
        margin = spec->cipherDef->max_records / 8;
    } else {
        spec = ss->ssl3.cwSpec;
        margin = spec->cipherDef->max_records / 4;
    }
    seqNum = spec->nextSeqNum;
    keyUpdate = seqNum > spec->cipherDef->max_records - margin;
    ssl_ReleaseSpecReadLock(ss);
    if (!keyUpdate) {
        return SECSuccess;
    }

    SSL_TRC(5, ("%d: SSL[%d]: automatic key update at %llx for %s cipher spec",
                SSL_GETPID(), ss->fd, seqNum,
                (dir == ssl_secret_read) ? "read" : "write"));
    keyUpdateRequest = (dir == ssl_secret_read) ? update_requested : update_not_requested;
    ssl_GetSSL3HandshakeLock(ss);
    if (ss->ssl3.clientCertRequested) {
        ss->ssl3.keyUpdateDeferred = PR_TRUE;
        ss->ssl3.deferredKeyUpdateRequest = keyUpdateRequest;
    } else {
        rv = tls13_SendKeyUpdate(ss, keyUpdateRequest,
                                 dir == ssl_secret_write /* buffer */);
    }
    ssl_ReleaseSSL3HandshakeLock(ss);
    return rv;
}

int
ssl_SecureRecv(sslSocket *ss, unsigned char *buf, int len, int flags)
{
    int rv = 0;

    if (ss->shutdownHow & ssl_SHUTDOWN_RCV) {
        PORT_SetError(PR_SOCKET_SHUTDOWN_ERROR);
        return PR_FAILURE;
    }
    if (flags & ~PR_MSG_PEEK) {
        PORT_SetError(PR_INVALID_ARGUMENT_ERROR);
        return PR_FAILURE;
    }

    if (!ssl_SocketIsBlocking(ss) && !ss->opt.fdx) {
        ssl_GetXmitBufLock(ss);
        if (ss->pendingBuf.len != 0) {
            rv = ssl_SendSavedWriteData(ss);
            if ((rv < 0) && (PORT_GetError() != PR_WOULD_BLOCK_ERROR)) {
                ssl_ReleaseXmitBufLock(ss);
                return SECFailure;
            }
        }
        ssl_ReleaseXmitBufLock(ss);
    }

    rv = 0;
    if (!PR_CLIST_IS_EMPTY(&ss->ssl3.hs.bufferedEarlyData)) {
        PORT_Assert(ss->version >= SSL_LIBRARY_VERSION_TLS_1_3);
        return tls13_Read0RttData(ss, buf, len);
    }

    /* If any of these is non-zero, the initial handshake is not done. */
    if (!ss->firstHsDone) {
        ssl_Get1stHandshakeLock(ss);
        if (ss->handshake) {
            rv = ssl_Do1stHandshake(ss);
        }
        ssl_Release1stHandshakeLock(ss);
    } else {
        if (tls13_CheckKeyUpdate(ss, ssl_secret_read) != SECSuccess) {
            rv = PR_FAILURE;
        }
    }
    if (rv < 0) {
        if (PORT_GetError() == PR_WOULD_BLOCK_ERROR &&
            !PR_CLIST_IS_EMPTY(&ss->ssl3.hs.bufferedEarlyData)) {
            PORT_Assert(ss->version >= SSL_LIBRARY_VERSION_TLS_1_3);
            return tls13_Read0RttData(ss, buf, len);
        }
        return rv;
    }

    if (len == 0)
        return 0;

    rv = DoRecv(ss, (unsigned char *)buf, len, flags);
    SSL_TRC(2, ("%d: SSL[%d]: recving %d bytes securely (errno=%d)",
                SSL_GETPID(), ss->fd, rv, PORT_GetError()));
    return rv;
}

int
ssl_SecureRead(sslSocket *ss, unsigned char *buf, int len)
{
    return ssl_SecureRecv(ss, buf, len, 0);
}

/* Caller holds the SSL Socket's write lock. SSL_LOCK_WRITER(ss) */
int
ssl_SecureSend(sslSocket *ss, const unsigned char *buf, int len, int flags)
{
    int rv = 0;
    PRBool zeroRtt = PR_FALSE;

    SSL_TRC(2, ("%d: SSL[%d]: SecureSend: sending %d bytes",
                SSL_GETPID(), ss->fd, len));

    if (ss->shutdownHow & ssl_SHUTDOWN_SEND) {
        PORT_SetError(PR_SOCKET_SHUTDOWN_ERROR);
        rv = PR_FAILURE;
        goto done;
    }
    if (flags) {
        PORT_SetError(PR_INVALID_ARGUMENT_ERROR);
        rv = PR_FAILURE;
        goto done;
    }

    ssl_GetXmitBufLock(ss);
    if (ss->pendingBuf.len != 0) {
        PORT_Assert(ss->pendingBuf.len > 0);
        rv = ssl_SendSavedWriteData(ss);
        if (rv >= 0 && ss->pendingBuf.len != 0) {
            PORT_Assert(ss->pendingBuf.len > 0);
            PORT_SetError(PR_WOULD_BLOCK_ERROR);
            rv = SECFailure;
        }
    }
    ssl_ReleaseXmitBufLock(ss);
    if (rv < 0) {
        goto done;
    }

    if (len > 0)
        ss->writerThread = PR_GetCurrentThread();

    /* Check to see if we can write even though we're not finished.
     *
     * Case 1: False start
     * Case 2: TLS 1.3 0-RTT
     */
    if (!ss->firstHsDone) {
        PRBool allowEarlySend = PR_FALSE;
        PRBool firstClientWrite = PR_FALSE;

        ssl_Get1stHandshakeLock(ss);
        /* The client can sometimes send before the handshake is fully
         * complete. In TLS 1.2: false start; in TLS 1.3: 0-RTT. */
        if (!ss->sec.isServer &&
            (ss->opt.enableFalseStart || ss->opt.enable0RttData)) {
            ssl_GetSSL3HandshakeLock(ss);
            zeroRtt = ss->ssl3.hs.zeroRttState == ssl_0rtt_sent ||
                      ss->ssl3.hs.zeroRttState == ssl_0rtt_accepted;
            allowEarlySend = ss->ssl3.hs.canFalseStart || zeroRtt;
            firstClientWrite = ss->ssl3.hs.ws == idle_handshake;
            ssl_ReleaseSSL3HandshakeLock(ss);
        }
        /* Allow the server to send 0.5 RTT data in TLS 1.3. Requesting a
         * certificate implies that the server might condition its sending on
         * client authentication, so force servers that do that to wait.
         *
         * What might not be obvious here is that this allows 0.5 RTT when doing
         * PSK-based resumption.  As a result, 0.5 RTT is always enabled when
         * early data is accepted.
         *
         * This check might be more conservative than absolutely necessary.
         * It's possible that allowing 0.5 RTT data when the server requests,
         * but does not require client authentication is safe because we can
         * expect the server to check for a client certificate properly. */
        if (ss->sec.isServer &&
            ss->version >= SSL_LIBRARY_VERSION_TLS_1_3 &&
            !tls13_ShouldRequestClientAuth(ss)) {
            ssl_GetSSL3HandshakeLock(ss);
            allowEarlySend = TLS13_IN_HS_STATE(ss, wait_finished);
            ssl_ReleaseSSL3HandshakeLock(ss);
        }
        if (!allowEarlySend && ss->handshake) {
            rv = ssl_Do1stHandshake(ss);
        }
        if (firstClientWrite) {
            /* Wait until after sending ClientHello and double-check 0-RTT. */
            ssl_GetSSL3HandshakeLock(ss);
            zeroRtt = ss->ssl3.hs.zeroRttState == ssl_0rtt_sent ||
                      ss->ssl3.hs.zeroRttState == ssl_0rtt_accepted;
            ssl_ReleaseSSL3HandshakeLock(ss);
        }
        ssl_Release1stHandshakeLock(ss);
    }

    if (rv < 0) {
        ss->writerThread = NULL;
        goto done;
    }

    if (ss->firstHsDone) {
        if (tls13_CheckKeyUpdate(ss, ssl_secret_write) != SECSuccess) {
            rv = PR_FAILURE;
            goto done;
        }
    }

    if (zeroRtt) {
        /* There's a limit to the number of early data octets we can send.
         *
         * Note that taking this lock doesn't prevent the cipher specs from
         * being changed out between here and when records are ultimately
         * encrypted.  The only effect of that is to occasionally do an
         * unnecessary short write when data is identified as 0-RTT here but
         * 1-RTT later.
         */
        ssl_GetSpecReadLock(ss);
        len = tls13_LimitEarlyData(ss, ssl_ct_application_data, len);
        ssl_ReleaseSpecReadLock(ss);
    }

    /* Check for zero length writes after we do housekeeping so we make forward
     * progress.
     */
    if (len == 0) {
        rv = 0;
        goto done;
    }
    PORT_Assert(buf != NULL);
    if (!buf) {
        PORT_SetError(PR_INVALID_ARGUMENT_ERROR);
        rv = PR_FAILURE;
        goto done;
    }

    ssl_GetXmitBufLock(ss);
    rv = ssl3_SendApplicationData(ss, buf, len, flags);
    ssl_ReleaseXmitBufLock(ss);
    ss->writerThread = NULL;
done:
    if (rv < 0) {
        SSL_TRC(2, ("%d: SSL[%d]: SecureSend: returning %d count, error %d",
                    SSL_GETPID(), ss->fd, rv, PORT_GetError()));
    } else {
        SSL_TRC(2, ("%d: SSL[%d]: SecureSend: returning %d count",
                    SSL_GETPID(), ss->fd, rv));
    }
    return rv;
}

int
ssl_SecureWrite(sslSocket *ss, const unsigned char *buf, int len)
{
    return ssl_SecureSend(ss, buf, len, 0);
}

SECStatus
SSLExp_RecordLayerWriteCallback(PRFileDesc *fd, SSLRecordWriteCallback cb,
                                void *arg)
{
    sslSocket *ss = ssl_FindSocket(fd);
    if (!ss) {
        SSL_DBG(("%d: SSL[%d]: invalid socket for SSL_RecordLayerWriteCallback",
                 SSL_GETPID(), fd));
        return SECFailure;
    }
    if (IS_DTLS(ss)) {
        SSL_DBG(("%d: SSL[%d]: DTLS socket for SSL_RecordLayerWriteCallback",
                 SSL_GETPID(), fd));
        PORT_SetError(SEC_ERROR_INVALID_ARGS);
        return SECFailure;
    }

    /* This needs both HS and Xmit locks because this value is checked under
     * both locks. HS to disable reading from the underlying IO layer; Xmit to
     * prevent writing. */
    ssl_GetSSL3HandshakeLock(ss);
    ssl_GetXmitBufLock(ss);
    ss->recordWriteCallback = cb;
    ss->recordWriteCallbackArg = arg;
    ssl_ReleaseXmitBufLock(ss);
    ssl_ReleaseSSL3HandshakeLock(ss);
    return SECSuccess;
}

SECStatus
SSL_AlertReceivedCallback(PRFileDesc *fd, SSLAlertCallback cb, void *arg)
{
    sslSocket *ss;

    ss = ssl_FindSocket(fd);
    if (!ss) {
        SSL_DBG(("%d: SSL[%d]: unable to find socket in SSL_AlertReceivedCallback",
                 SSL_GETPID(), fd));
        return SECFailure;
    }

    ss->alertReceivedCallback = cb;
    ss->alertReceivedCallbackArg = arg;

    return SECSuccess;
}

SECStatus
SSL_AlertSentCallback(PRFileDesc *fd, SSLAlertCallback cb, void *arg)
{
    sslSocket *ss;

    ss = ssl_FindSocket(fd);
    if (!ss) {
        SSL_DBG(("%d: SSL[%d]: unable to find socket in SSL_AlertSentCallback",
                 SSL_GETPID(), fd));
        return SECFailure;
    }

    ss->alertSentCallback = cb;
    ss->alertSentCallbackArg = arg;

    return SECSuccess;
}

SECStatus
SSL_BadCertHook(PRFileDesc *fd, SSLBadCertHandler f, void *arg)
{
    sslSocket *ss;

    ss = ssl_FindSocket(fd);
    if (!ss) {
        SSL_DBG(("%d: SSL[%d]: bad socket in SSLBadCertHook",
                 SSL_GETPID(), fd));
        return SECFailure;
    }

    ss->handleBadCert = f;
    ss->badCertArg = arg;

    return SECSuccess;
}

/*
 * Allow the application to pass the url or hostname into the SSL library
 * so that we can do some checking on it. It will be used for the value in
 * SNI extension of client hello message.
 */
SECStatus
SSL_SetURL(PRFileDesc *fd, const char *url)
{
    sslSocket *ss = ssl_FindSocket(fd);
    SECStatus rv = SECSuccess;

    if (!ss) {
        SSL_DBG(("%d: SSL[%d]: bad socket in SSLSetURL",
                 SSL_GETPID(), fd));
        return SECFailure;
    }
    ssl_Get1stHandshakeLock(ss);
    ssl_GetSSL3HandshakeLock(ss);

    if (ss->url) {
        PORT_Free((void *)ss->url); /* CONST */
    }

    ss->url = (const char *)PORT_Strdup(url);
    if (ss->url == NULL) {
        rv = SECFailure;
    }

    ssl_ReleaseSSL3HandshakeLock(ss);
    ssl_Release1stHandshakeLock(ss);

    return rv;
}

/*
 * Allow the application to pass the set of trust anchors
 */
SECStatus
SSL_SetTrustAnchors(PRFileDesc *fd, CERTCertList *certList)
{
    sslSocket *ss = ssl_FindSocket(fd);
    CERTDistNames *names = NULL;

    if (!certList) {
        PORT_SetError(SEC_ERROR_INVALID_ARGS);
        return SECFailure;
    }
    if (!ss) {
        SSL_DBG(("%d: SSL[%d]: bad socket in SSL_SetTrustAnchors",
                 SSL_GETPID(), fd));
        return SECFailure;
    }

    names = CERT_DistNamesFromCertList(certList);
    if (names == NULL) {
        return SECFailure;
    }
    ssl_Get1stHandshakeLock(ss);
    ssl_GetSSL3HandshakeLock(ss);
    if (ss->ssl3.ca_list) {
        CERT_FreeDistNames(ss->ssl3.ca_list);
    }
    ss->ssl3.ca_list = names;
    ssl_ReleaseSSL3HandshakeLock(ss);
    ssl_Release1stHandshakeLock(ss);

    return SECSuccess;
}

/*
** Returns Negative number on error, zero or greater on success.
** Returns the amount of data immediately available to be read.
*/
int
SSL_DataPending(PRFileDesc *fd)
{
    sslSocket *ss;
    int rv = 0;

    ss = ssl_FindSocket(fd);

    if (ss && ss->opt.useSecurity) {
        ssl_GetRecvBufLock(ss);
        rv = ss->gs.writeOffset - ss->gs.readOffset;
        ssl_ReleaseRecvBufLock(ss);
    }

    return rv;
}

SECStatus
SSL_InvalidateSession(PRFileDesc *fd)
{
    sslSocket *ss = ssl_FindSocket(fd);
    SECStatus rv = SECFailure;

    if (ss) {
        ssl_Get1stHandshakeLock(ss);
        ssl_GetSSL3HandshakeLock(ss);

        if (ss->sec.ci.sid) {
            ssl_UncacheSessionID(ss);
            rv = SECSuccess;
        }

        ssl_ReleaseSSL3HandshakeLock(ss);
        ssl_Release1stHandshakeLock(ss);
    }
    return rv;
}

SECItem *
SSL_GetSessionID(PRFileDesc *fd)
{
    sslSocket *ss;
    SECItem *item = NULL;

    ss = ssl_FindSocket(fd);
    if (ss) {
        ssl_Get1stHandshakeLock(ss);
        ssl_GetSSL3HandshakeLock(ss);

        if (ss->opt.useSecurity && ss->firstHsDone && ss->sec.ci.sid) {
            item = (SECItem *)PORT_Alloc(sizeof(SECItem));
            if (item) {
                sslSessionID *sid = ss->sec.ci.sid;
                item->len = sid->u.ssl3.sessionIDLength;
                item->data = (unsigned char *)PORT_Alloc(item->len);
                PORT_Memcpy(item->data, sid->u.ssl3.sessionID, item->len);
            }
        }

        ssl_ReleaseSSL3HandshakeLock(ss);
        ssl_Release1stHandshakeLock(ss);
    }
    return item;
}

SECStatus
SSL_CertDBHandleSet(PRFileDesc *fd, CERTCertDBHandle *dbHandle)
{
    sslSocket *ss;

    ss = ssl_FindSocket(fd);
    if (!ss)
        return SECFailure;
    if (!dbHandle) {
        PORT_SetError(SEC_ERROR_INVALID_ARGS);
        return SECFailure;
    }
    ss->dbHandle = dbHandle;
    return SECSuccess;
}

/* DO NOT USE. This function was exported in ssl.def with the wrong signature;
 * this implementation exists to maintain link-time compatibility.
 */
int
SSL_RestartHandshakeAfterCertReq(sslSocket *ss,
                                 CERTCertificate *cert,
                                 SECKEYPrivateKey *key,
                                 CERTCertificateList *certChain)
{
    PORT_SetError(PR_NOT_IMPLEMENTED_ERROR);
    return -1;
}

/* DO NOT USE. This function was exported in ssl.def with the wrong signature;
 * this implementation exists to maintain link-time compatibility.
 */
int
SSL_RestartHandshakeAfterServerCert(sslSocket *ss)
{
    PORT_SetError(PR_NOT_IMPLEMENTED_ERROR);
    return -1;
}

/* See documentation in ssl.h */
SECStatus
SSL_AuthCertificateComplete(PRFileDesc *fd, PRErrorCode error)
{
    SECStatus rv;
    sslSocket *ss = ssl_FindSocket(fd);

    if (!ss) {
        SSL_DBG(("%d: SSL[%d]: bad socket in SSL_AuthCertificateComplete",
                 SSL_GETPID(), fd));
        return SECFailure;
    }

    ssl_Get1stHandshakeLock(ss);
    rv = ssl3_AuthCertificateComplete(ss, error);
    ssl_Release1stHandshakeLock(ss);

    return rv;
}

/* For more info see ssl.h */
SECStatus
SSL_SNISocketConfigHook(PRFileDesc *fd, SSLSNISocketConfig func,
                        void *arg)
{
    sslSocket *ss;

    ss = ssl_FindSocket(fd);
    if (!ss) {
        SSL_DBG(("%d: SSL[%d]: bad socket in SNISocketConfigHook",
                 SSL_GETPID(), fd));
        return SECFailure;
    }

    ss->sniSocketConfig = func;
    ss->sniSocketConfigArg = arg;
    return SECSuccess;
}