aboutsummaryrefslogtreecommitdiffstats
path: root/lib/ssl/doc/src/notes.xml
blob: 299850333d270fb580824bc366fdd1d0f19d0b87 (plain) (blame)
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
<?xml version="1.0" encoding="iso-8859-1" ?>
<!DOCTYPE chapter SYSTEM "chapter.dtd">

<chapter>
  <header>
    <copyright>
      <year>1999</year><year>2013</year>
      <holder>Ericsson AB. All Rights Reserved.</holder>
    </copyright>
    <legalnotice>
      The contents of this file are subject to the Erlang Public License,
      Version 1.1, (the "License"); you may not use this file except in
      compliance with the License. You should have received a copy of the
      Erlang Public License along with this software. If not, it can be
      retrieved online at http://www.erlang.org/.

      Software distributed under the License is distributed on an "AS IS"
      basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
      the License for the specific language governing rights and limitations
      under the License.

    </legalnotice>

    <title>SSL Release Notes</title>
    <file>notes.xml</file>
  </header>
  <p>This document describes the changes made to the SSL application.</p>
  
  <section><title>SSL 5.2</title>

    <section><title>Fixed Bugs and Malfunctions</title>
      <list>
        <item>
          <p>
	    SSL: TLS 1.2, advertise sha224 support, thanks to Andreas
	    Schultz.</p>
          <p>
	    Own Id: OTP-10586</p>
        </item>
        <item>
          <p>
	    If an ssl server is restarted with new options and a
	    client tries to reuse a session the server must make sure
	    that it complies to the new options before agreeing to
	    reuse it.</p>
          <p>
	    Own Id: OTP-10595</p>
        </item>
        <item>
          <p>
	    Now handles cleaning of CA-certificate database correctly
	    so that there will be no memory leek, bug was introduced
	    in ssl- 5.1 when changing implementation to increase
	    parallel execution.</p>
          <p>
	    Impact: Improved memory usage, especially if you have
	    many different certificates and upgrade tcp-connections
	    to TLS-connections.</p>
          <p>
	    Own Id: OTP-10710</p>
        </item>
      </list>
    </section>


    <section><title>Improvements and New Features</title>
      <list>
        <item>
          <p>
	    Support Next Protocol Negotiation in TLS, thanks to Ben
	    Murphy for the contribution.</p>
          <p>
	    Impact: Could give performance benefit if used as it
	    saves a round trip.</p>
          <p>
	    Own Id: OTP-10361 Aux Id: kunagi-214 [125] </p>
        </item>
        <item>
          <p>
	    TLS 1.2 will now be the default TLS version if sufficient
	    crypto support is available otherwise TLS 1.1 will be
	    default.</p>
          <p>
	    Impact: A default TLS connection will have higher
	    security and hence it may be perceived as slower then
	    before.</p>
          <p>
	    Own Id: OTP-10425 Aux Id: kunagi-275 [186] </p>
        </item>
        <item>
          <p>
	    It is now possible to call controlling_process on a
	    listen socket, same as in gen_tcp.</p>
          <p>
	    Own Id: OTP-10447</p>
        </item>
        <item>
          <p>
	    Remove filter mechanisms that made error messages
	    backwards compatible with old ssl but hid information
	    about what actually happened.</p>
          <p>
	    This does not break the documented API however other
	    reason terms may be returned, so code that matches on the
	    reason part of {error, Reason} may fail.</p>
          <p>
	    *** POTENTIAL INCOMPATIBILITY ***</p>
          <p>
	    Own Id: OTP-10451 Aux Id: kunagi-270 [181] </p>
        </item>
        <item>
          <p>
	    Added missing dependencies to Makefile</p>
          <p>
	    Own Id: OTP-10594</p>
        </item>
        <item>
          <p>
	    Removed deprecated function ssl:pid/0, it has been
	    pointless since R14 but has been keep for backwards
	    compatibility.</p>
          <p>
	    *** POTENTIAL INCOMPATIBILITY ***</p>
          <p>
	    Own Id: OTP-10613 Aux Id: kunagi-331 [242] </p>
        </item>
        <item>
          <p>
	    Refactor to simplify addition of key exchange methods,
	    thanks to Andreas Schultz.</p>
          <p>
	    Own Id: OTP-10709</p>
        </item>
      </list>
    </section>

</section>

<section><title>SSL 5.1.2</title>

    <section><title>Fixed Bugs and Malfunctions</title>
      <list>
        <item>
          <p>
	    ssl:ssl_accept/2 timeout is no longer ignored</p>
          <p>
	    Own Id: OTP-10600</p>
        </item>
      </list>
    </section>

</section>

<section><title>SSL 5.1.1</title>

    <section><title>Fixed Bugs and Malfunctions</title>
      <list>
        <item>
          <p>
	    ssl:recv/3 could "loose" data when the timeout occurs. If
	    the timout in ssl:connect or ssl:ssl_accept expired the
	    ssl connection process was not terminated as it should,
	    this due to gen_fsm:send_all_state_event timout is a
	    client side time out. These timouts are now handled by
	    the gen_fsm-procss instead.</p>
          <p>
	    Own Id: OTP-10569</p>
        </item>
      </list>
    </section>


    <section><title>Improvements and New Features</title>
      <list>
        <item>
          <p>
	    Better termination handling that avoids hanging.</p>
          <p>
	    Own Id: OTP-10574</p>
        </item>
      </list>
    </section>

</section>

<section><title>SSL 5.1</title>

    <section><title>Fixed Bugs and Malfunctions</title>
      <list>
        <item>
          <p>
	    Sometimes the client process could receive an extra
	    {error, closed} message after ssl:recv had returned
	    {error, closed}.</p>
          <p>
	    Own Id: OTP-10118</p>
        </item>
        <item>
          <p>
	    ssl v3 alert number 41 (no_certificate_RESERVED) is now
	    recognized</p>
          <p>
	    Own Id: OTP-10196</p>
        </item>
      </list>
    </section>


    <section><title>Improvements and New Features</title>
      <list>
        <item>
          <p>
	    Experimental support for TLS 1.1 is now available, will
	    be officially supported from OTP-R16. Thanks to Andreas
	    Schultz for implementing the first version.</p>
          <p>
	    Own Id: OTP-8871</p>
        </item>
        <item>
          <p>
	    Experimental support for TLS 1.2 is now available, will
	    be officially supported from OTP-R16. Thanks to Andreas
	    Schultz for implementing the first version.</p>
          <p>
	    Own Id: OTP-8872</p>
        </item>
        <item>
          <p>
	    Removed some bottlenecks increasing the applications
	    parallelism especially for the client side.</p>
          <p>
	    Own Id: OTP-10113</p>
        </item>
        <item>
          <p>
	    Workaround for handling certificates that wrongly encode
	    X509countryname in utf-8 when the actual value is a valid
	    ASCCI value of length 2. Such certificates are accepted
	    by many browsers such as Chrome and Fierfox so for
	    interoperability reasons we will too.</p>
          <p>
	    Own Id: OTP-10222</p>
        </item>
      </list>
    </section>

</section>

<section><title>SSL 5.0.1</title>

    <section><title>Fixed Bugs and Malfunctions</title>
      <list>
        <item>
          <p>
	    Robustness and improvement to distribution over SSL</p>
          <p>
	    Fix a bug where ssl_tls_dist_proxy would crash at caller
	    timeout. Fix a bug where a timeout from the SSL layer
	    would block the distribution indefinately. Run the proxy
	    exclusively on the loopback interface. (Thanks to Paul
	    Guyot)</p>
          <p>
	    Own Id: OTP-9915</p>
        </item>
        <item>
          <p>
	    Fix setup loop of SSL TLS dist proxy</p>
          <p>
	    Fix potential leak of processes waiting indefinately for
	    data from closed sockets during socket setup phase.
	    (Thanks to Paul Guyot)</p>
          <p>
	    Own Id: OTP-9916</p>
        </item>
        <item>
          <p>
	    Correct spelling of registered (Thanks to Richard
	    Carlsson)</p>
          <p>
	    Own Id: OTP-9925</p>
        </item>
        <item>
          <p>
	    Added TLS PRF function to the SSL API for generation of
	    additional key material from a TLS session. (Thanks to
	    Andreas Schultz)</p>
          <p>
	    Own Id: OTP-10024</p>
        </item>
      </list>
    </section>

</section>

<section><title>SSL 5.0</title>

    <section><title>Fixed Bugs and Malfunctions</title>
      <list>
        <item>
          <p>
	    Invalidation handling of sessions could cause the
	    time_stamp field in the session record to be set to
	    undefined crashing the session clean up process. This did
	    not affect the connections but would result in that the
	    session table would grow.</p>
          <p>
	    Own Id: OTP-9696 Aux Id: seq11947 </p>
        </item>
        <item>
          <p>
	    Changed code to use ets:foldl and throw instead of
	    ets:next traversal, avoiding the need to explicitly call
	    ets:safe_fixtable. It was possible to get a badarg-crash
	    under special circumstances.</p>
          <p>
	    Own Id: OTP-9703 Aux Id: seq11947 </p>
        </item>
        <item>
          <p>
	    Send ssl_closed notification to active ssl user when a
	    tcp error occurs.</p>
          <p>
	    Own Id: OTP-9734 Aux Id: seq11946 </p>
        </item>
        <item>
          <p>
	    If a passive receive was ongoing during a renegotiation
	    the process evaluating ssl:recv could be left hanging for
	    ever.</p>
          <p>
	    Own Id: OTP-9744</p>
        </item>
      </list>
    </section>


    <section><title>Improvements and New Features</title>
      <list>
        <item>
          <p>
	    Support for the old ssl implementation is dropped and the
	    code is removed.</p>
          <p>
	    Own Id: OTP-7048</p>
        </item>
        <item>
          <p>
	    The erlang distribution can now be run over the new ssl
	    implementation. All options can currently not be set but
	    it is enough to replace to old ssl implementation.</p>
          <p>
	    Own Id: OTP-7053</p>
        </item>
        <item>
          <p>
	    public_key, ssl and crypto now supports PKCS-8</p>
          <p>
	    Own Id: OTP-9312</p>
        </item>
        <item>
          <p>
	    Implements a CBC timing attack counter measure. Thanks to
	    Andreas Schultz for providing the patch.</p>
          <p>
	    Own Id: OTP-9683</p>
        </item>
        <item>
          <p>
	    Mitigates an SSL/TLS Computational DoS attack by
	    disallowing the client to renegotiate many times in a row
	    in a short time interval, thanks to Tuncer Ayaz for
	    alerting us about this.</p>
          <p>
	    Own Id: OTP-9739</p>
        </item>
        <item>
          <p>
	    Implements the 1/n-1 splitting countermeasure to the
	    Rizzo Duong BEAST attack, affects SSL 3.0 and TLS 1.0.
	    Thanks to Tuncer Ayaz for alerting us about this.</p>
          <p>
	    Own Id: OTP-9750</p>
        </item>
      </list>
    </section>

</section>

<section><title>SSL 4.1.6</title>

    <section><title>Fixed Bugs and Malfunctions</title>
      <list>
        <item>
          <p>
	    replace "a ssl" with "an ssl" reindent
	    pkix_path_validation/3 Trivial documentation fixes
	    (Thanks to Christian von Roques )</p>
          <p>
	    Own Id: OTP-9464</p>
        </item>
      </list>
    </section>


    <section><title>Improvements and New Features</title>
      <list>
        <item>
          <p>
	    Adds function clause to avoid denial of service attack.
	    Thanks to Vinod for reporting this vulnerability.</p>
          <p>
	    Own Id: OTP-9364</p>
        </item>
        <item>
          <p>
	    Error handling code now takes care of inet:getopts/2 and
	    inets:setopts/2 crashes. Thanks to Richard Jones for
	    reporting this.</p>
          <p>
	    Own Id: OTP-9382</p>
        </item>
        <item>
          <p>
	    Support explicit use of packet option httph and httph_bin</p>
          <p>
	    Own Id: OTP-9461</p>
        </item>
        <item>
          <p>
	    Decoding of hello extensions could fail to come to the
	    correct conclusion due to an error in a binary match
	    pattern. Thanks to Ben Murphy.</p>
          <p>
	    Own Id: OTP-9589</p>
        </item>
      </list>
    </section>

</section>

<section>
    <title>SSL 4.1.5</title>
    
    <section><title>Improvements and New Features</title>
    <list>
      <item>
	<p>Calling gen_tcp:connect with option {ip, {127,0,0,1}} results in 
	an exit with reason badarg. Neither SSL nor INETS This was not 
	catched, resulting in crashes with incomprehensible reasons.</p>
	<p>Own Id: OTP-9289 Aux Id: seq11845</p>
      </item>
    </list>
    </section>
    
  </section>
  
  <section>
    <title>SSL 4.1.3</title>
  
    <section><title>Fixed Bugs and Malfunctions</title>
    <list>
      <item>
	<p>
	Fixed error in cache-handling fix from ssl-4.1.2</p>
	<p>
	Own Id: OTP-9018 Aux Id: seq11739 </p>
      </item>
      <item>
	<p>Verification of a critical extended_key_usage-extension
	corrected</p>
	<p>Own Id: OTP-9029 Aux Id: seq11541 </p>
      </item>
    </list>
    </section>

  </section>

  <section>
    <title>SSL 4.1.2</title>

    <section><title>Fixed Bugs and Malfunctions</title>
      <list>
        <item>
          <p>
	    The ssl application caches certificate files, it will now
	    invalidate cache entries if the diskfile is changed.</p>
          <p>
	    Own Id: OTP-8965 Aux Id: seq11739 </p>
        </item>
        <item>
          <p>
	    Now runs the terminate function before returning from the
	    call made by ssl:close/1, as before the caller of
	    ssl:close/1 could get problems with the reuseaddr option.</p>
          <p>
	    Own Id: OTP-8992</p>
        </item>
      </list>
    </section>

</section>

<section><title>SSL 4.1.1</title>

    <section><title>Fixed Bugs and Malfunctions</title>
      <list>
        <item>
          <p>
	    Correct handling of client certificate verify message
	    When checking the client certificate verify message the
	    server used the wrong algorithm identifier to determine
	    the signing algorithm, causing a function clause error in
	    the public_key application when the key-exchange
	    algorithm and the public key algorithm of the client
	    certificate happen to differ.</p>
          <p>
	    Own Id: OTP-8897</p>
        </item>
      </list>
    </section>


    <section><title>Improvements and New Features</title>
      <list>
        <item>
          <p>
	    For testing purposes ssl now also support some anonymous
	    cipher suites when explicitly configured to do so.</p>
          <p>
	    Own Id: OTP-8870</p>
        </item>
        <item>
          <p>
	    Sends an error alert instead of crashing if a crypto
	    function for the selected cipher suite fails.</p>
          <p>
	    Own Id: OTP-8930 Aux Id: seq11720 </p>
        </item>
      </list>
    </section>

</section>

<section><title>SSL 4.1</title>

    <section><title>Improvements and New Features</title>
      <list>
        <item>
          <p>
	    Updated ssl to ignore CA certs that violate the asn1-spec
	    for a certificate, and updated public key asn1 spec to
	    handle inherited DSS-params.</p>
          <p>
	    Own Id: OTP-7884</p>
        </item>
        <item>
          <p>
	    Changed ssl implementation to retain backwards
	    compatibility for old option {verify, 0} that shall be
	    equivalent to {verify, verify_none}, also separate the
	    cases unknown ca and selfsigned peer cert, and restored
	    return value of deprecated function
	    public_key:pem_to_der/1.</p>
          <p>
	    Own Id: OTP-8858</p>
        </item>
        <item>
          <p>
	    Changed the verify fun so that it differentiate between
	    the peer certificate and CA certificates by using
	    valid_peer or valid as the second argument to the verify
	    fun. It may not always be trivial or even possible to
	    know when the peer certificate is reached otherwise.</p>
          <p>
	    *** POTENTIAL INCOMPATIBILITY ***</p>
          <p>
	    Own Id: OTP-8873</p>
        </item>
      </list>
    </section>

</section>

<section><title>SSL 4.0.1</title>

    <section><title>Fixed Bugs and Malfunctions</title>
      <list>
        <item>
          <p>
	    The server now verifies the client certificate verify
	    message correctly, instead of causing a case-clause.</p>
          <p>
	    Own Id: OTP-8721</p>
        </item>
        <item>
          <p>
	    The client hello message now always include ALL available
	    cipher suites (or those specified by the ciphers option).
	    Previous implementation would filter them based on the
	    client certificate key usage extension (such filtering
	    only makes sense for the server certificate).</p>
          <p>
	    Own Id: OTP-8772</p>
        </item>
        <item>
          <p>
	    Fixed handling of the option {mode, list} that was broken
	    for some packet types for instance line.</p>
          <p>
	    Own Id: OTP-8785</p>
        </item>
        <item>
          <p>
	    Empty packets were not delivered to the client.</p>
          <p>
	    Own Id: OTP-8790</p>
        </item>
        <item>
	    <p> Building in a source tree without prebuilt platform
	    independent build results failed on the SSL examples
	    when: </p> <list><item> cross building. This has been
	    solved by not building the SSL examples during a cross
	    build. </item><item> building on Windows. </item></list>
          <p>
	    Own Id: OTP-8791</p>
        </item>
        <item>
          <p>
	    Fixed a handshake error which occurred on some ssl
	    implementations.</p>
          <p>
	    Own Id: OTP-8793</p>
        </item>
      </list>
    </section>


    <section><title>Improvements and New Features</title>
      <list>
        <item>
          <p>
	    Revise the public_key API - Cleaned up and documented the
	    public_key API to make it useful for general use, also
	    changed ssl to use the new API.</p>
          <p>
	    Own Id: OTP-8722</p>
        </item>
        <item>
          <p>
	    Added support for inputing certificates and keys directly
	    in DER format these options will override the pem-file
	    options if specified.</p>
          <p>
	    Own Id: OTP-8723</p>
        </item>
        <item>
          <p>
	    To gain interoperability ssl will not check for padding
	    errors when using TLS 1.0. It is first in TLS 1.1 that
	    checking the padding is an requirement.</p>
          <p>
	    Own Id: OTP-8740</p>
        </item>
        <item>
          <p>
	    Changed the semantics of the verify_fun option in the
	    ssl-application so that it takes care of both application
	    handling of path validation errors and verification of
	    application specific extensions. This means that it is
	    now possible for the server application in verify_peer
	    mode to handle path validation errors. This change moved
	    some functionality earlier in ssl to the public_key
	    application.</p>
          <p>
	    Own Id: OTP-8770</p>
        </item>
        <item>
          <p>
	    Added the functionality so that the verification fun will
	    be called when a certificate is considered valid by the
	    path validation to allow access to each certificate in
	    the path to the user application. Also try to verify
	    subject-AltName, if unable to verify it let the
	    application verify it.</p>
          <p>
	    Own Id: OTP-8825</p>
        </item>
      </list>
    </section>

</section>

<section><title>SSL 4.0</title>
    
    <section><title>Improvements and New Features</title>
    <list>
      <item>
	<p>
	  New ssl now support client/server-certificates signed by
	dsa keys.</p>
	<p>
	Own Id: OTP-8587</p>
      </item>
      <item>
	<p>
	  Ssl has now switched default implementation and removed
	  deprecated certificate handling. All certificate handling
	is done by the public_key application.</p>
	<p>
	Own Id: OTP-8695</p>
      </item>
    </list>
    </section>
    </section>
</chapter>