forked from openssl/openssl
-
Notifications
You must be signed in to change notification settings - Fork 0
/
ssl_ciph.c
2250 lines (1977 loc) · 70 KB
/
ssl_ciph.c
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
/*
* Copyright 1995-2024 The OpenSSL Project Authors. All Rights Reserved.
* Copyright (c) 2002, Oracle and/or its affiliates. All rights reserved
* Copyright 2005 Nokia. All rights reserved.
*
* Licensed under the Apache License 2.0 (the "License"). You may not use
* this file except in compliance with the License. You can obtain a copy
* in the file LICENSE in the source distribution or at
* https://www.openssl.org/source/license.html
*/
#include <stdio.h>
#include <ctype.h>
#include <openssl/objects.h>
#include <openssl/comp.h>
#include <openssl/engine.h>
#include <openssl/crypto.h>
#include <openssl/conf.h>
#include <openssl/trace.h>
#include "internal/nelem.h"
#include "ssl_local.h"
#include "internal/thread_once.h"
#include "internal/cryptlib.h"
#include "internal/comp.h"
/* NB: make sure indices in these tables match values above */
typedef struct {
uint32_t mask;
int nid;
} ssl_cipher_table;
/* Table of NIDs for each cipher */
static const ssl_cipher_table ssl_cipher_table_cipher[SSL_ENC_NUM_IDX] = {
{SSL_DES, NID_des_cbc}, /* SSL_ENC_DES_IDX 0 */
{SSL_3DES, NID_des_ede3_cbc}, /* SSL_ENC_3DES_IDX 1 */
{SSL_RC4, NID_rc4}, /* SSL_ENC_RC4_IDX 2 */
{SSL_RC2, NID_rc2_cbc}, /* SSL_ENC_RC2_IDX 3 */
{SSL_IDEA, NID_idea_cbc}, /* SSL_ENC_IDEA_IDX 4 */
{SSL_eNULL, NID_undef}, /* SSL_ENC_NULL_IDX 5 */
{SSL_AES128, NID_aes_128_cbc}, /* SSL_ENC_AES128_IDX 6 */
{SSL_AES256, NID_aes_256_cbc}, /* SSL_ENC_AES256_IDX 7 */
{SSL_CAMELLIA128, NID_camellia_128_cbc}, /* SSL_ENC_CAMELLIA128_IDX 8 */
{SSL_CAMELLIA256, NID_camellia_256_cbc}, /* SSL_ENC_CAMELLIA256_IDX 9 */
{SSL_eGOST2814789CNT, NID_gost89_cnt}, /* SSL_ENC_GOST89_IDX 10 */
{SSL_SEED, NID_seed_cbc}, /* SSL_ENC_SEED_IDX 11 */
{SSL_AES128GCM, NID_aes_128_gcm}, /* SSL_ENC_AES128GCM_IDX 12 */
{SSL_AES256GCM, NID_aes_256_gcm}, /* SSL_ENC_AES256GCM_IDX 13 */
{SSL_AES128CCM, NID_aes_128_ccm}, /* SSL_ENC_AES128CCM_IDX 14 */
{SSL_AES256CCM, NID_aes_256_ccm}, /* SSL_ENC_AES256CCM_IDX 15 */
{SSL_AES128CCM8, NID_aes_128_ccm}, /* SSL_ENC_AES128CCM8_IDX 16 */
{SSL_AES256CCM8, NID_aes_256_ccm}, /* SSL_ENC_AES256CCM8_IDX 17 */
{SSL_eGOST2814789CNT12, NID_gost89_cnt_12}, /* SSL_ENC_GOST8912_IDX 18 */
{SSL_CHACHA20POLY1305, NID_chacha20_poly1305}, /* SSL_ENC_CHACHA_IDX 19 */
{SSL_ARIA128GCM, NID_aria_128_gcm}, /* SSL_ENC_ARIA128GCM_IDX 20 */
{SSL_ARIA256GCM, NID_aria_256_gcm}, /* SSL_ENC_ARIA256GCM_IDX 21 */
{SSL_MAGMA, NID_magma_ctr_acpkm}, /* SSL_ENC_MAGMA_IDX */
{SSL_KUZNYECHIK, NID_kuznyechik_ctr_acpkm}, /* SSL_ENC_KUZNYECHIK_IDX */
};
/* NB: make sure indices in this table matches values above */
static const ssl_cipher_table ssl_cipher_table_mac[SSL_MD_NUM_IDX] = {
{SSL_MD5, NID_md5}, /* SSL_MD_MD5_IDX 0 */
{SSL_SHA1, NID_sha1}, /* SSL_MD_SHA1_IDX 1 */
{SSL_GOST94, NID_id_GostR3411_94}, /* SSL_MD_GOST94_IDX 2 */
{SSL_GOST89MAC, NID_id_Gost28147_89_MAC}, /* SSL_MD_GOST89MAC_IDX 3 */
{SSL_SHA256, NID_sha256}, /* SSL_MD_SHA256_IDX 4 */
{SSL_SHA384, NID_sha384}, /* SSL_MD_SHA384_IDX 5 */
{SSL_GOST12_256, NID_id_GostR3411_2012_256}, /* SSL_MD_GOST12_256_IDX 6 */
{SSL_GOST89MAC12, NID_gost_mac_12}, /* SSL_MD_GOST89MAC12_IDX 7 */
{SSL_GOST12_512, NID_id_GostR3411_2012_512}, /* SSL_MD_GOST12_512_IDX 8 */
{0, NID_md5_sha1}, /* SSL_MD_MD5_SHA1_IDX 9 */
{0, NID_sha224}, /* SSL_MD_SHA224_IDX 10 */
{0, NID_sha512}, /* SSL_MD_SHA512_IDX 11 */
{SSL_MAGMAOMAC, NID_magma_mac}, /* sSL_MD_MAGMAOMAC_IDX */
{SSL_KUZNYECHIKOMAC, NID_kuznyechik_mac} /* SSL_MD_KUZNYECHIKOMAC_IDX */
};
/* *INDENT-OFF* */
static const ssl_cipher_table ssl_cipher_table_kx[] = {
{SSL_kRSA, NID_kx_rsa},
{SSL_kECDHE, NID_kx_ecdhe},
{SSL_kDHE, NID_kx_dhe},
{SSL_kECDHEPSK, NID_kx_ecdhe_psk},
{SSL_kDHEPSK, NID_kx_dhe_psk},
{SSL_kRSAPSK, NID_kx_rsa_psk},
{SSL_kPSK, NID_kx_psk},
{SSL_kSRP, NID_kx_srp},
{SSL_kGOST, NID_kx_gost},
{SSL_kGOST18, NID_kx_gost18},
{SSL_kANY, NID_kx_any}
};
static const ssl_cipher_table ssl_cipher_table_auth[] = {
{SSL_aRSA, NID_auth_rsa},
{SSL_aECDSA, NID_auth_ecdsa},
{SSL_aPSK, NID_auth_psk},
{SSL_aDSS, NID_auth_dss},
{SSL_aGOST01, NID_auth_gost01},
{SSL_aGOST12, NID_auth_gost12},
{SSL_aSRP, NID_auth_srp},
{SSL_aNULL, NID_auth_null},
{SSL_aANY, NID_auth_any}
};
/* *INDENT-ON* */
/* Utility function for table lookup */
static int ssl_cipher_info_find(const ssl_cipher_table *table,
size_t table_cnt, uint32_t mask)
{
size_t i;
for (i = 0; i < table_cnt; i++, table++) {
if (table->mask == mask)
return (int)i;
}
return -1;
}
#define ssl_cipher_info_lookup(table, x) \
ssl_cipher_info_find(table, OSSL_NELEM(table), x)
/*
* PKEY_TYPE for GOST89MAC is known in advance, but, because implementation
* is engine-provided, we'll fill it only if corresponding EVP_PKEY_METHOD is
* found
*/
static const int default_mac_pkey_id[SSL_MD_NUM_IDX] = {
/* MD5, SHA, GOST94, MAC89 */
EVP_PKEY_HMAC, EVP_PKEY_HMAC, EVP_PKEY_HMAC, NID_undef,
/* SHA256, SHA384, GOST2012_256, MAC89-12 */
EVP_PKEY_HMAC, EVP_PKEY_HMAC, EVP_PKEY_HMAC, NID_undef,
/* GOST2012_512 */
EVP_PKEY_HMAC,
/* MD5/SHA1, SHA224, SHA512, MAGMAOMAC, KUZNYECHIKOMAC */
NID_undef, NID_undef, NID_undef, NID_undef, NID_undef
};
#define CIPHER_ADD 1
#define CIPHER_KILL 2
#define CIPHER_DEL 3
#define CIPHER_ORD 4
#define CIPHER_SPECIAL 5
/*
* Bump the ciphers to the top of the list.
* This rule isn't currently supported by the public cipherstring API.
*/
#define CIPHER_BUMP 6
typedef struct cipher_order_st {
const SSL_CIPHER *cipher;
int active;
int dead;
struct cipher_order_st *next, *prev;
} CIPHER_ORDER;
static const SSL_CIPHER cipher_aliases[] = {
/* "ALL" doesn't include eNULL (must be specifically enabled) */
{0, SSL_TXT_ALL, NULL, 0, 0, 0, ~SSL_eNULL},
/* "COMPLEMENTOFALL" */
{0, SSL_TXT_CMPALL, NULL, 0, 0, 0, SSL_eNULL},
/*
* "COMPLEMENTOFDEFAULT" (does *not* include ciphersuites not found in
* ALL!)
*/
{0, SSL_TXT_CMPDEF, NULL, 0, 0, 0, 0, 0, 0, 0, 0, 0, SSL_NOT_DEFAULT},
/*
* key exchange aliases (some of those using only a single bit here
* combine multiple key exchange algs according to the RFCs, e.g. kDHE
* combines DHE_DSS and DHE_RSA)
*/
{0, SSL_TXT_kRSA, NULL, 0, SSL_kRSA},
{0, SSL_TXT_kEDH, NULL, 0, SSL_kDHE},
{0, SSL_TXT_kDHE, NULL, 0, SSL_kDHE},
{0, SSL_TXT_DH, NULL, 0, SSL_kDHE},
{0, SSL_TXT_kEECDH, NULL, 0, SSL_kECDHE},
{0, SSL_TXT_kECDHE, NULL, 0, SSL_kECDHE},
{0, SSL_TXT_ECDH, NULL, 0, SSL_kECDHE},
{0, SSL_TXT_kPSK, NULL, 0, SSL_kPSK},
{0, SSL_TXT_kRSAPSK, NULL, 0, SSL_kRSAPSK},
{0, SSL_TXT_kECDHEPSK, NULL, 0, SSL_kECDHEPSK},
{0, SSL_TXT_kDHEPSK, NULL, 0, SSL_kDHEPSK},
{0, SSL_TXT_kSRP, NULL, 0, SSL_kSRP},
{0, SSL_TXT_kGOST, NULL, 0, SSL_kGOST},
{0, SSL_TXT_kGOST18, NULL, 0, SSL_kGOST18},
/* server authentication aliases */
{0, SSL_TXT_aRSA, NULL, 0, 0, SSL_aRSA},
{0, SSL_TXT_aDSS, NULL, 0, 0, SSL_aDSS},
{0, SSL_TXT_DSS, NULL, 0, 0, SSL_aDSS},
{0, SSL_TXT_aNULL, NULL, 0, 0, SSL_aNULL},
{0, SSL_TXT_aECDSA, NULL, 0, 0, SSL_aECDSA},
{0, SSL_TXT_ECDSA, NULL, 0, 0, SSL_aECDSA},
{0, SSL_TXT_aPSK, NULL, 0, 0, SSL_aPSK},
{0, SSL_TXT_aGOST01, NULL, 0, 0, SSL_aGOST01},
{0, SSL_TXT_aGOST12, NULL, 0, 0, SSL_aGOST12},
{0, SSL_TXT_aGOST, NULL, 0, 0, SSL_aGOST01 | SSL_aGOST12},
{0, SSL_TXT_aSRP, NULL, 0, 0, SSL_aSRP},
/* aliases combining key exchange and server authentication */
{0, SSL_TXT_EDH, NULL, 0, SSL_kDHE, ~SSL_aNULL},
{0, SSL_TXT_DHE, NULL, 0, SSL_kDHE, ~SSL_aNULL},
{0, SSL_TXT_EECDH, NULL, 0, SSL_kECDHE, ~SSL_aNULL},
{0, SSL_TXT_ECDHE, NULL, 0, SSL_kECDHE, ~SSL_aNULL},
{0, SSL_TXT_NULL, NULL, 0, 0, 0, SSL_eNULL},
{0, SSL_TXT_RSA, NULL, 0, SSL_kRSA, SSL_aRSA},
{0, SSL_TXT_ADH, NULL, 0, SSL_kDHE, SSL_aNULL},
{0, SSL_TXT_AECDH, NULL, 0, SSL_kECDHE, SSL_aNULL},
{0, SSL_TXT_PSK, NULL, 0, SSL_PSK},
{0, SSL_TXT_SRP, NULL, 0, SSL_kSRP},
/* symmetric encryption aliases */
{0, SSL_TXT_3DES, NULL, 0, 0, 0, SSL_3DES},
{0, SSL_TXT_RC4, NULL, 0, 0, 0, SSL_RC4},
{0, SSL_TXT_RC2, NULL, 0, 0, 0, SSL_RC2},
{0, SSL_TXT_IDEA, NULL, 0, 0, 0, SSL_IDEA},
{0, SSL_TXT_SEED, NULL, 0, 0, 0, SSL_SEED},
{0, SSL_TXT_eNULL, NULL, 0, 0, 0, SSL_eNULL},
{0, SSL_TXT_GOST, NULL, 0, 0, 0,
SSL_eGOST2814789CNT | SSL_eGOST2814789CNT12 | SSL_MAGMA | SSL_KUZNYECHIK},
{0, SSL_TXT_AES128, NULL, 0, 0, 0,
SSL_AES128 | SSL_AES128GCM | SSL_AES128CCM | SSL_AES128CCM8},
{0, SSL_TXT_AES256, NULL, 0, 0, 0,
SSL_AES256 | SSL_AES256GCM | SSL_AES256CCM | SSL_AES256CCM8},
{0, SSL_TXT_AES, NULL, 0, 0, 0, SSL_AES},
{0, SSL_TXT_AES_GCM, NULL, 0, 0, 0, SSL_AES128GCM | SSL_AES256GCM},
{0, SSL_TXT_AES_CCM, NULL, 0, 0, 0,
SSL_AES128CCM | SSL_AES256CCM | SSL_AES128CCM8 | SSL_AES256CCM8},
{0, SSL_TXT_AES_CCM_8, NULL, 0, 0, 0, SSL_AES128CCM8 | SSL_AES256CCM8},
{0, SSL_TXT_CAMELLIA128, NULL, 0, 0, 0, SSL_CAMELLIA128},
{0, SSL_TXT_CAMELLIA256, NULL, 0, 0, 0, SSL_CAMELLIA256},
{0, SSL_TXT_CAMELLIA, NULL, 0, 0, 0, SSL_CAMELLIA},
{0, SSL_TXT_CHACHA20, NULL, 0, 0, 0, SSL_CHACHA20},
{0, SSL_TXT_GOST2012_GOST8912_GOST8912, NULL, 0, 0, 0, SSL_eGOST2814789CNT12},
{0, SSL_TXT_ARIA, NULL, 0, 0, 0, SSL_ARIA},
{0, SSL_TXT_ARIA_GCM, NULL, 0, 0, 0, SSL_ARIA128GCM | SSL_ARIA256GCM},
{0, SSL_TXT_ARIA128, NULL, 0, 0, 0, SSL_ARIA128GCM},
{0, SSL_TXT_ARIA256, NULL, 0, 0, 0, SSL_ARIA256GCM},
{0, SSL_TXT_CBC, NULL, 0, 0, 0, SSL_CBC},
/* MAC aliases */
{0, SSL_TXT_MD5, NULL, 0, 0, 0, 0, SSL_MD5},
{0, SSL_TXT_SHA1, NULL, 0, 0, 0, 0, SSL_SHA1},
{0, SSL_TXT_SHA, NULL, 0, 0, 0, 0, SSL_SHA1},
{0, SSL_TXT_GOST94, NULL, 0, 0, 0, 0, SSL_GOST94},
{0, SSL_TXT_GOST89MAC, NULL, 0, 0, 0, 0, SSL_GOST89MAC | SSL_GOST89MAC12},
{0, SSL_TXT_SHA256, NULL, 0, 0, 0, 0, SSL_SHA256},
{0, SSL_TXT_SHA384, NULL, 0, 0, 0, 0, SSL_SHA384},
{0, SSL_TXT_GOST12, NULL, 0, 0, 0, 0, SSL_GOST12_256},
/* protocol version aliases */
{0, SSL_TXT_SSLV3, NULL, 0, 0, 0, 0, 0, SSL3_VERSION},
{0, SSL_TXT_TLSV1, NULL, 0, 0, 0, 0, 0, TLS1_VERSION},
{0, "TLSv1.0", NULL, 0, 0, 0, 0, 0, TLS1_VERSION},
{0, SSL_TXT_TLSV1_2, NULL, 0, 0, 0, 0, 0, TLS1_2_VERSION},
/* strength classes */
{0, SSL_TXT_LOW, NULL, 0, 0, 0, 0, 0, 0, 0, 0, 0, SSL_LOW},
{0, SSL_TXT_MEDIUM, NULL, 0, 0, 0, 0, 0, 0, 0, 0, 0, SSL_MEDIUM},
{0, SSL_TXT_HIGH, NULL, 0, 0, 0, 0, 0, 0, 0, 0, 0, SSL_HIGH},
/* FIPS 140-2 approved ciphersuite */
{0, SSL_TXT_FIPS, NULL, 0, 0, 0, ~SSL_eNULL, 0, 0, 0, 0, 0, SSL_FIPS},
/* "EDH-" aliases to "DHE-" labels (for backward compatibility) */
{0, SSL3_TXT_EDH_DSS_DES_192_CBC3_SHA, NULL, 0,
SSL_kDHE, SSL_aDSS, SSL_3DES, SSL_SHA1, 0, 0, 0, 0, SSL_HIGH | SSL_FIPS},
{0, SSL3_TXT_EDH_RSA_DES_192_CBC3_SHA, NULL, 0,
SSL_kDHE, SSL_aRSA, SSL_3DES, SSL_SHA1, 0, 0, 0, 0, SSL_HIGH | SSL_FIPS},
};
/*
* Search for public key algorithm with given name and return its pkey_id if
* it is available. Otherwise return 0
*/
#ifdef OPENSSL_NO_ENGINE
static int get_optional_pkey_id(const char *pkey_name)
{
const EVP_PKEY_ASN1_METHOD *ameth;
int pkey_id = 0;
ameth = EVP_PKEY_asn1_find_str(NULL, pkey_name, -1);
if (ameth && EVP_PKEY_asn1_get0_info(&pkey_id, NULL, NULL, NULL, NULL,
ameth) > 0)
return pkey_id;
return 0;
}
#else
static int get_optional_pkey_id(const char *pkey_name)
{
const EVP_PKEY_ASN1_METHOD *ameth;
ENGINE *tmpeng = NULL;
int pkey_id = 0;
ameth = EVP_PKEY_asn1_find_str(&tmpeng, pkey_name, -1);
if (ameth) {
if (EVP_PKEY_asn1_get0_info(&pkey_id, NULL, NULL, NULL, NULL,
ameth) <= 0)
pkey_id = 0;
}
tls_engine_finish(tmpeng);
return pkey_id;
}
#endif
int ssl_load_ciphers(SSL_CTX *ctx)
{
size_t i;
const ssl_cipher_table *t;
EVP_KEYEXCH *kex = NULL;
EVP_SIGNATURE *sig = NULL;
ctx->disabled_enc_mask = 0;
for (i = 0, t = ssl_cipher_table_cipher; i < SSL_ENC_NUM_IDX; i++, t++) {
if (t->nid != NID_undef) {
const EVP_CIPHER *cipher
= ssl_evp_cipher_fetch(ctx->libctx, t->nid, ctx->propq);
ctx->ssl_cipher_methods[i] = cipher;
if (cipher == NULL)
ctx->disabled_enc_mask |= t->mask;
}
}
ctx->disabled_mac_mask = 0;
for (i = 0, t = ssl_cipher_table_mac; i < SSL_MD_NUM_IDX; i++, t++) {
const EVP_MD *md
= ssl_evp_md_fetch(ctx->libctx, t->nid, ctx->propq);
ctx->ssl_digest_methods[i] = md;
if (md == NULL) {
ctx->disabled_mac_mask |= t->mask;
} else {
int tmpsize = EVP_MD_get_size(md);
if (!ossl_assert(tmpsize >= 0))
return 0;
ctx->ssl_mac_secret_size[i] = tmpsize;
}
}
ctx->disabled_mkey_mask = 0;
ctx->disabled_auth_mask = 0;
/*
* We ignore any errors from the fetches below. They are expected to fail
* if these algorithms are not available.
*/
ERR_set_mark();
sig = EVP_SIGNATURE_fetch(ctx->libctx, "DSA", ctx->propq);
if (sig == NULL)
ctx->disabled_auth_mask |= SSL_aDSS;
else
EVP_SIGNATURE_free(sig);
kex = EVP_KEYEXCH_fetch(ctx->libctx, "DH", ctx->propq);
if (kex == NULL)
ctx->disabled_mkey_mask |= SSL_kDHE | SSL_kDHEPSK;
else
EVP_KEYEXCH_free(kex);
kex = EVP_KEYEXCH_fetch(ctx->libctx, "ECDH", ctx->propq);
if (kex == NULL)
ctx->disabled_mkey_mask |= SSL_kECDHE | SSL_kECDHEPSK;
else
EVP_KEYEXCH_free(kex);
sig = EVP_SIGNATURE_fetch(ctx->libctx, "ECDSA", ctx->propq);
if (sig == NULL)
ctx->disabled_auth_mask |= SSL_aECDSA;
else
EVP_SIGNATURE_free(sig);
ERR_pop_to_mark();
#ifdef OPENSSL_NO_PSK
ctx->disabled_mkey_mask |= SSL_PSK;
ctx->disabled_auth_mask |= SSL_aPSK;
#endif
#ifdef OPENSSL_NO_SRP
ctx->disabled_mkey_mask |= SSL_kSRP;
#endif
/*
* Check for presence of GOST 34.10 algorithms, and if they are not
* present, disable appropriate auth and key exchange
*/
memcpy(ctx->ssl_mac_pkey_id, default_mac_pkey_id,
sizeof(ctx->ssl_mac_pkey_id));
ctx->ssl_mac_pkey_id[SSL_MD_GOST89MAC_IDX] =
get_optional_pkey_id(SN_id_Gost28147_89_MAC);
if (ctx->ssl_mac_pkey_id[SSL_MD_GOST89MAC_IDX])
ctx->ssl_mac_secret_size[SSL_MD_GOST89MAC_IDX] = 32;
else
ctx->disabled_mac_mask |= SSL_GOST89MAC;
ctx->ssl_mac_pkey_id[SSL_MD_GOST89MAC12_IDX] =
get_optional_pkey_id(SN_gost_mac_12);
if (ctx->ssl_mac_pkey_id[SSL_MD_GOST89MAC12_IDX])
ctx->ssl_mac_secret_size[SSL_MD_GOST89MAC12_IDX] = 32;
else
ctx->disabled_mac_mask |= SSL_GOST89MAC12;
ctx->ssl_mac_pkey_id[SSL_MD_MAGMAOMAC_IDX] =
get_optional_pkey_id(SN_magma_mac);
if (ctx->ssl_mac_pkey_id[SSL_MD_MAGMAOMAC_IDX])
ctx->ssl_mac_secret_size[SSL_MD_MAGMAOMAC_IDX] = 32;
else
ctx->disabled_mac_mask |= SSL_MAGMAOMAC;
ctx->ssl_mac_pkey_id[SSL_MD_KUZNYECHIKOMAC_IDX] =
get_optional_pkey_id(SN_kuznyechik_mac);
if (ctx->ssl_mac_pkey_id[SSL_MD_KUZNYECHIKOMAC_IDX])
ctx->ssl_mac_secret_size[SSL_MD_KUZNYECHIKOMAC_IDX] = 32;
else
ctx->disabled_mac_mask |= SSL_KUZNYECHIKOMAC;
if (!get_optional_pkey_id(SN_id_GostR3410_2001))
ctx->disabled_auth_mask |= SSL_aGOST01 | SSL_aGOST12;
if (!get_optional_pkey_id(SN_id_GostR3410_2012_256))
ctx->disabled_auth_mask |= SSL_aGOST12;
if (!get_optional_pkey_id(SN_id_GostR3410_2012_512))
ctx->disabled_auth_mask |= SSL_aGOST12;
/*
* Disable GOST key exchange if no GOST signature algs are available *
*/
if ((ctx->disabled_auth_mask & (SSL_aGOST01 | SSL_aGOST12)) ==
(SSL_aGOST01 | SSL_aGOST12))
ctx->disabled_mkey_mask |= SSL_kGOST;
if ((ctx->disabled_auth_mask & SSL_aGOST12) == SSL_aGOST12)
ctx->disabled_mkey_mask |= SSL_kGOST18;
return 1;
}
int ssl_cipher_get_evp_cipher(SSL_CTX *ctx, const SSL_CIPHER *sslc,
const EVP_CIPHER **enc)
{
int i = ssl_cipher_info_lookup(ssl_cipher_table_cipher,
sslc->algorithm_enc);
if (i == -1) {
*enc = NULL;
} else {
if (i == SSL_ENC_NULL_IDX) {
/*
* We assume we don't care about this coming from an ENGINE so
* just do a normal EVP_CIPHER_fetch instead of
* ssl_evp_cipher_fetch()
*/
*enc = EVP_CIPHER_fetch(ctx->libctx, "NULL", ctx->propq);
if (*enc == NULL)
return 0;
} else {
const EVP_CIPHER *cipher = ctx->ssl_cipher_methods[i];
if (cipher == NULL
|| !ssl_evp_cipher_up_ref(cipher))
return 0;
*enc = ctx->ssl_cipher_methods[i];
}
}
return 1;
}
int ssl_cipher_get_evp_md_mac(SSL_CTX *ctx, const SSL_CIPHER *sslc,
const EVP_MD **md,
int *mac_pkey_type, size_t *mac_secret_size)
{
int i = ssl_cipher_info_lookup(ssl_cipher_table_mac, sslc->algorithm_mac);
if (i == -1) {
*md = NULL;
if (mac_pkey_type != NULL)
*mac_pkey_type = NID_undef;
if (mac_secret_size != NULL)
*mac_secret_size = 0;
} else {
const EVP_MD *digest = ctx->ssl_digest_methods[i];
if (digest == NULL || !ssl_evp_md_up_ref(digest))
return 0;
*md = digest;
if (mac_pkey_type != NULL)
*mac_pkey_type = ctx->ssl_mac_pkey_id[i];
if (mac_secret_size != NULL)
*mac_secret_size = ctx->ssl_mac_secret_size[i];
}
return 1;
}
int ssl_cipher_get_evp(SSL_CTX *ctx, const SSL_SESSION *s,
const EVP_CIPHER **enc, const EVP_MD **md,
int *mac_pkey_type, size_t *mac_secret_size,
SSL_COMP **comp, int use_etm)
{
int i;
const SSL_CIPHER *c;
c = s->cipher;
if (c == NULL)
return 0;
if (comp != NULL) {
SSL_COMP ctmp;
STACK_OF(SSL_COMP) *comp_methods;
*comp = NULL;
ctmp.id = s->compress_meth;
comp_methods = SSL_COMP_get_compression_methods();
if (comp_methods != NULL) {
i = sk_SSL_COMP_find(comp_methods, &ctmp);
if (i >= 0)
*comp = sk_SSL_COMP_value(comp_methods, i);
}
/* If were only interested in comp then return success */
if ((enc == NULL) && (md == NULL))
return 1;
}
if ((enc == NULL) || (md == NULL))
return 0;
if (!ssl_cipher_get_evp_cipher(ctx, c, enc))
return 0;
if (!ssl_cipher_get_evp_md_mac(ctx, c, md, mac_pkey_type,
mac_secret_size)) {
ssl_evp_cipher_free(*enc);
return 0;
}
if ((*enc != NULL)
&& (*md != NULL
|| (EVP_CIPHER_get_flags(*enc) & EVP_CIPH_FLAG_AEAD_CIPHER))
&& (c->algorithm_mac == SSL_AEAD
|| mac_pkey_type == NULL || *mac_pkey_type != NID_undef)) {
const EVP_CIPHER *evp = NULL;
if (use_etm
|| s->ssl_version >> 8 != TLS1_VERSION_MAJOR
|| s->ssl_version < TLS1_VERSION)
return 1;
if (c->algorithm_enc == SSL_RC4
&& c->algorithm_mac == SSL_MD5)
evp = ssl_evp_cipher_fetch(ctx->libctx, NID_rc4_hmac_md5,
ctx->propq);
else if (c->algorithm_enc == SSL_AES128
&& c->algorithm_mac == SSL_SHA1)
evp = ssl_evp_cipher_fetch(ctx->libctx,
NID_aes_128_cbc_hmac_sha1,
ctx->propq);
else if (c->algorithm_enc == SSL_AES256
&& c->algorithm_mac == SSL_SHA1)
evp = ssl_evp_cipher_fetch(ctx->libctx,
NID_aes_256_cbc_hmac_sha1,
ctx->propq);
else if (c->algorithm_enc == SSL_AES128
&& c->algorithm_mac == SSL_SHA256)
evp = ssl_evp_cipher_fetch(ctx->libctx,
NID_aes_128_cbc_hmac_sha256,
ctx->propq);
else if (c->algorithm_enc == SSL_AES256
&& c->algorithm_mac == SSL_SHA256)
evp = ssl_evp_cipher_fetch(ctx->libctx,
NID_aes_256_cbc_hmac_sha256,
ctx->propq);
if (evp != NULL) {
ssl_evp_cipher_free(*enc);
ssl_evp_md_free(*md);
*enc = evp;
*md = NULL;
}
return 1;
}
return 0;
}
const EVP_MD *ssl_md(SSL_CTX *ctx, int idx)
{
idx &= SSL_HANDSHAKE_MAC_MASK;
if (idx < 0 || idx >= SSL_MD_NUM_IDX)
return NULL;
return ctx->ssl_digest_methods[idx];
}
const EVP_MD *ssl_handshake_md(SSL_CONNECTION *s)
{
return ssl_md(SSL_CONNECTION_GET_CTX(s), ssl_get_algorithm2(s));
}
const EVP_MD *ssl_prf_md(SSL_CONNECTION *s)
{
return ssl_md(SSL_CONNECTION_GET_CTX(s),
ssl_get_algorithm2(s) >> TLS1_PRF_DGST_SHIFT);
}
#define ITEM_SEP(a) \
(((a) == ':') || ((a) == ' ') || ((a) == ';') || ((a) == ','))
static void ll_append_tail(CIPHER_ORDER **head, CIPHER_ORDER *curr,
CIPHER_ORDER **tail)
{
if (curr == *tail)
return;
if (curr == *head)
*head = curr->next;
if (curr->prev != NULL)
curr->prev->next = curr->next;
if (curr->next != NULL)
curr->next->prev = curr->prev;
(*tail)->next = curr;
curr->prev = *tail;
curr->next = NULL;
*tail = curr;
}
static void ll_append_head(CIPHER_ORDER **head, CIPHER_ORDER *curr,
CIPHER_ORDER **tail)
{
if (curr == *head)
return;
if (curr == *tail)
*tail = curr->prev;
if (curr->next != NULL)
curr->next->prev = curr->prev;
if (curr->prev != NULL)
curr->prev->next = curr->next;
(*head)->prev = curr;
curr->next = *head;
curr->prev = NULL;
*head = curr;
}
static void ssl_cipher_collect_ciphers(const SSL_METHOD *ssl_method,
int num_of_ciphers,
uint32_t disabled_mkey,
uint32_t disabled_auth,
uint32_t disabled_enc,
uint32_t disabled_mac,
CIPHER_ORDER *co_list,
CIPHER_ORDER **head_p,
CIPHER_ORDER **tail_p)
{
int i, co_list_num;
const SSL_CIPHER *c;
/*
* We have num_of_ciphers descriptions compiled in, depending on the
* method selected (SSLv3, TLSv1 etc).
* These will later be sorted in a linked list with at most num
* entries.
*/
/* Get the initial list of ciphers */
co_list_num = 0; /* actual count of ciphers */
for (i = 0; i < num_of_ciphers; i++) {
c = ssl_method->get_cipher(i);
/* drop those that use any of that is not available */
if (c == NULL || !c->valid)
continue;
if ((c->algorithm_mkey & disabled_mkey) ||
(c->algorithm_auth & disabled_auth) ||
(c->algorithm_enc & disabled_enc) ||
(c->algorithm_mac & disabled_mac))
continue;
if (((ssl_method->ssl3_enc->enc_flags & SSL_ENC_FLAG_DTLS) == 0) &&
c->min_tls == 0)
continue;
if (((ssl_method->ssl3_enc->enc_flags & SSL_ENC_FLAG_DTLS) != 0) &&
c->min_dtls == 0)
continue;
co_list[co_list_num].cipher = c;
co_list[co_list_num].next = NULL;
co_list[co_list_num].prev = NULL;
co_list[co_list_num].active = 0;
co_list_num++;
}
/*
* Prepare linked list from list entries
*/
if (co_list_num > 0) {
co_list[0].prev = NULL;
if (co_list_num > 1) {
co_list[0].next = &co_list[1];
for (i = 1; i < co_list_num - 1; i++) {
co_list[i].prev = &co_list[i - 1];
co_list[i].next = &co_list[i + 1];
}
co_list[co_list_num - 1].prev = &co_list[co_list_num - 2];
}
co_list[co_list_num - 1].next = NULL;
*head_p = &co_list[0];
*tail_p = &co_list[co_list_num - 1];
}
}
static void ssl_cipher_collect_aliases(const SSL_CIPHER **ca_list,
int num_of_group_aliases,
uint32_t disabled_mkey,
uint32_t disabled_auth,
uint32_t disabled_enc,
uint32_t disabled_mac,
CIPHER_ORDER *head)
{
CIPHER_ORDER *ciph_curr;
const SSL_CIPHER **ca_curr;
int i;
uint32_t mask_mkey = ~disabled_mkey;
uint32_t mask_auth = ~disabled_auth;
uint32_t mask_enc = ~disabled_enc;
uint32_t mask_mac = ~disabled_mac;
/*
* First, add the real ciphers as already collected
*/
ciph_curr = head;
ca_curr = ca_list;
while (ciph_curr != NULL) {
*ca_curr = ciph_curr->cipher;
ca_curr++;
ciph_curr = ciph_curr->next;
}
/*
* Now we add the available ones from the cipher_aliases[] table.
* They represent either one or more algorithms, some of which
* in any affected category must be supported (set in enabled_mask),
* or represent a cipher strength value (will be added in any case because algorithms=0).
*/
for (i = 0; i < num_of_group_aliases; i++) {
uint32_t algorithm_mkey = cipher_aliases[i].algorithm_mkey;
uint32_t algorithm_auth = cipher_aliases[i].algorithm_auth;
uint32_t algorithm_enc = cipher_aliases[i].algorithm_enc;
uint32_t algorithm_mac = cipher_aliases[i].algorithm_mac;
if (algorithm_mkey)
if ((algorithm_mkey & mask_mkey) == 0)
continue;
if (algorithm_auth)
if ((algorithm_auth & mask_auth) == 0)
continue;
if (algorithm_enc)
if ((algorithm_enc & mask_enc) == 0)
continue;
if (algorithm_mac)
if ((algorithm_mac & mask_mac) == 0)
continue;
*ca_curr = (SSL_CIPHER *)(cipher_aliases + i);
ca_curr++;
}
*ca_curr = NULL; /* end of list */
}
static void ssl_cipher_apply_rule(uint32_t cipher_id, uint32_t alg_mkey,
uint32_t alg_auth, uint32_t alg_enc,
uint32_t alg_mac, int min_tls,
uint32_t algo_strength, int rule,
int32_t strength_bits, CIPHER_ORDER **head_p,
CIPHER_ORDER **tail_p)
{
CIPHER_ORDER *head, *tail, *curr, *next, *last;
const SSL_CIPHER *cp;
int reverse = 0;
OSSL_TRACE_BEGIN(TLS_CIPHER) {
BIO_printf(trc_out,
"Applying rule %d with %08x/%08x/%08x/%08x/%08x %08x (%d)\n",
rule, (unsigned int)alg_mkey, (unsigned int)alg_auth,
(unsigned int)alg_enc, (unsigned int)alg_mac, min_tls,
(unsigned int)algo_strength, (int)strength_bits);
}
if (rule == CIPHER_DEL || rule == CIPHER_BUMP)
reverse = 1; /* needed to maintain sorting between currently
* deleted ciphers */
head = *head_p;
tail = *tail_p;
if (reverse) {
next = tail;
last = head;
} else {
next = head;
last = tail;
}
curr = NULL;
for (;;) {
if (curr == last)
break;
curr = next;
if (curr == NULL)
break;
next = reverse ? curr->prev : curr->next;
cp = curr->cipher;
/*
* Selection criteria is either the value of strength_bits
* or the algorithms used.
*/
if (strength_bits >= 0) {
if (strength_bits != cp->strength_bits)
continue;
} else {
if (trc_out != NULL) {
BIO_printf(trc_out,
"\nName: %s:"
"\nAlgo = %08x/%08x/%08x/%08x/%08x Algo_strength = %08x\n",
cp->name,
(unsigned int)cp->algorithm_mkey,
(unsigned int)cp->algorithm_auth,
(unsigned int)cp->algorithm_enc,
(unsigned int)cp->algorithm_mac,
cp->min_tls,
(unsigned int)cp->algo_strength);
}
if (cipher_id != 0 && (cipher_id != cp->id))
continue;
if (alg_mkey && !(alg_mkey & cp->algorithm_mkey))
continue;
if (alg_auth && !(alg_auth & cp->algorithm_auth))
continue;
if (alg_enc && !(alg_enc & cp->algorithm_enc))
continue;
if (alg_mac && !(alg_mac & cp->algorithm_mac))
continue;
if (min_tls && (min_tls != cp->min_tls))
continue;
if ((algo_strength & SSL_STRONG_MASK)
&& !(algo_strength & SSL_STRONG_MASK & cp->algo_strength))
continue;
if ((algo_strength & SSL_DEFAULT_MASK)
&& !(algo_strength & SSL_DEFAULT_MASK & cp->algo_strength))
continue;
}
if (trc_out != NULL)
BIO_printf(trc_out, "Action = %d\n", rule);
/* add the cipher if it has not been added yet. */
if (rule == CIPHER_ADD) {
/* reverse == 0 */
if (!curr->active) {
ll_append_tail(&head, curr, &tail);
curr->active = 1;
}
}
/* Move the added cipher to this location */
else if (rule == CIPHER_ORD) {
/* reverse == 0 */
if (curr->active) {
ll_append_tail(&head, curr, &tail);
}
} else if (rule == CIPHER_DEL) {
/* reverse == 1 */
if (curr->active) {
/*
* most recently deleted ciphersuites get best positions for
* any future CIPHER_ADD (note that the CIPHER_DEL loop works
* in reverse to maintain the order)
*/
ll_append_head(&head, curr, &tail);
curr->active = 0;
}
} else if (rule == CIPHER_BUMP) {
if (curr->active)
ll_append_head(&head, curr, &tail);
} else if (rule == CIPHER_KILL) {
/* reverse == 0 */
if (head == curr)
head = curr->next;
else
curr->prev->next = curr->next;
if (tail == curr)
tail = curr->prev;
curr->active = 0;
if (curr->next != NULL)
curr->next->prev = curr->prev;
if (curr->prev != NULL)
curr->prev->next = curr->next;
curr->next = NULL;
curr->prev = NULL;
}
}
*head_p = head;
*tail_p = tail;
OSSL_TRACE_END(TLS_CIPHER);
}
static int ssl_cipher_strength_sort(CIPHER_ORDER **head_p,
CIPHER_ORDER **tail_p)
{
int32_t max_strength_bits;
int i, *number_uses;
CIPHER_ORDER *curr;
/*
* This routine sorts the ciphers with descending strength. The sorting
* must keep the pre-sorted sequence, so we apply the normal sorting
* routine as '+' movement to the end of the list.
*/
max_strength_bits = 0;
curr = *head_p;
while (curr != NULL) {
if (curr->active && (curr->cipher->strength_bits > max_strength_bits))
max_strength_bits = curr->cipher->strength_bits;
curr = curr->next;
}
number_uses = OPENSSL_zalloc(sizeof(int) * (max_strength_bits + 1));
if (number_uses == NULL)
return 0;
/*
* Now find the strength_bits values actually used
*/
curr = *head_p;
while (curr != NULL) {
if (curr->active)
number_uses[curr->cipher->strength_bits]++;
curr = curr->next;
}
/*
* Go through the list of used strength_bits values in descending
* order.
*/
for (i = max_strength_bits; i >= 0; i--)
if (number_uses[i] > 0)
ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_ORD, i, head_p,
tail_p);
OPENSSL_free(number_uses);
return 1;
}
static int ssl_cipher_process_rulestr(const char *rule_str,
CIPHER_ORDER **head_p,
CIPHER_ORDER **tail_p,
const SSL_CIPHER **ca_list, CERT *c)
{
uint32_t alg_mkey, alg_auth, alg_enc, alg_mac, algo_strength;
int min_tls;
const char *l, *buf;
int j, multi, found, rule, retval, ok, buflen;
uint32_t cipher_id = 0;
char ch;
retval = 1;
l = rule_str;
for (;;) {
ch = *l;
if (ch == '\0')
break; /* done */
if (ch == '-') {
rule = CIPHER_DEL;
l++;
} else if (ch == '+') {
rule = CIPHER_ORD;
l++;
} else if (ch == '!') {
rule = CIPHER_KILL;
l++;
} else if (ch == '@') {
rule = CIPHER_SPECIAL;
l++;
} else {
rule = CIPHER_ADD;
}
if (ITEM_SEP(ch)) {
l++;
continue;