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
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
|
/*
* Copyright 1995-2021 The OpenSSL Project Authors. 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
*/
/* We need to use some engine deprecated APIs */
#define OPENSSL_SUPPRESS_DEPRECATED
#include <stdio.h>
#include <limits.h>
#include <assert.h>
#include <openssl/evp.h>
#include <openssl/err.h>
#include <openssl/rand.h>
#ifndef FIPS_MODULE
# include <openssl/engine.h>
#endif
#include <openssl/params.h>
#include <openssl/core_names.h>
#include "internal/cryptlib.h"
#include "internal/provider.h"
#include "internal/core.h"
#include "crypto/evp.h"
#include "evp_local.h"
int EVP_CIPHER_CTX_reset(EVP_CIPHER_CTX *ctx)
{
if (ctx == NULL)
return 1;
if (ctx->cipher == NULL || ctx->cipher->prov == NULL)
goto legacy;
if (ctx->algctx != NULL) {
if (ctx->cipher->freectx != NULL)
ctx->cipher->freectx(ctx->algctx);
ctx->algctx = NULL;
}
if (ctx->fetched_cipher != NULL)
EVP_CIPHER_free(ctx->fetched_cipher);
memset(ctx, 0, sizeof(*ctx));
return 1;
/* Remove legacy code below when legacy support is removed. */
legacy:
if (ctx->cipher != NULL) {
if (ctx->cipher->cleanup && !ctx->cipher->cleanup(ctx))
return 0;
/* Cleanse cipher context data */
if (ctx->cipher_data && ctx->cipher->ctx_size)
OPENSSL_cleanse(ctx->cipher_data, ctx->cipher->ctx_size);
}
OPENSSL_free(ctx->cipher_data);
#if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE)
ENGINE_finish(ctx->engine);
#endif
memset(ctx, 0, sizeof(*ctx));
return 1;
}
EVP_CIPHER_CTX *EVP_CIPHER_CTX_new(void)
{
return OPENSSL_zalloc(sizeof(EVP_CIPHER_CTX));
}
void EVP_CIPHER_CTX_free(EVP_CIPHER_CTX *ctx)
{
if (ctx == NULL)
return;
EVP_CIPHER_CTX_reset(ctx);
OPENSSL_free(ctx);
}
static int evp_cipher_init_internal(EVP_CIPHER_CTX *ctx,
const EVP_CIPHER *cipher,
ENGINE *impl, const unsigned char *key,
const unsigned char *iv, int enc,
const OSSL_PARAM params[])
{
int n;
#if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE)
ENGINE *tmpimpl = NULL;
#endif
/*
* enc == 1 means we are encrypting.
* enc == 0 means we are decrypting.
* enc == -1 means, use the previously initialised value for encrypt/decrypt
*/
if (enc == -1) {
enc = ctx->encrypt;
} else {
if (enc)
enc = 1;
ctx->encrypt = enc;
}
if (cipher == NULL && ctx->cipher == NULL) {
ERR_raise(ERR_LIB_EVP, EVP_R_NO_CIPHER_SET);
return 0;
}
/* Code below to be removed when legacy support is dropped. */
#if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE)
/*
* Whether it's nice or not, "Inits" can be used on "Final"'d contexts so
* this context may already have an ENGINE! Try to avoid releasing the
* previous handle, re-querying for an ENGINE, and having a
* reinitialisation, when it may all be unnecessary.
*/
if (ctx->engine && ctx->cipher
&& (cipher == NULL || cipher->nid == ctx->cipher->nid))
goto skip_to_init;
if (cipher != NULL && impl == NULL) {
/* Ask if an ENGINE is reserved for this job */
tmpimpl = ENGINE_get_cipher_engine(cipher->nid);
}
#endif
/*
* If there are engines involved then we should use legacy handling for now.
*/
if (ctx->engine != NULL
#if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE)
|| tmpimpl != NULL
#endif
|| impl != NULL) {
if (ctx->cipher == ctx->fetched_cipher)
ctx->cipher = NULL;
EVP_CIPHER_free(ctx->fetched_cipher);
ctx->fetched_cipher = NULL;
goto legacy;
}
/*
* Ensure a context left lying around from last time is cleared
* (legacy code)
*/
if (cipher != NULL && ctx->cipher != NULL) {
OPENSSL_clear_free(ctx->cipher_data, ctx->cipher->ctx_size);
ctx->cipher_data = NULL;
}
/* Start of non-legacy code below */
/* Ensure a context left lying around from last time is cleared */
if (cipher != NULL && ctx->cipher != NULL) {
unsigned long flags = ctx->flags;
EVP_CIPHER_CTX_reset(ctx);
/* Restore encrypt and flags */
ctx->encrypt = enc;
ctx->flags = flags;
}
if (cipher == NULL)
cipher = ctx->cipher;
if (cipher->prov == NULL) {
#ifdef FIPS_MODULE
/* We only do explicit fetches inside the FIPS module */
ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
return 0;
#else
EVP_CIPHER *provciph =
EVP_CIPHER_fetch(NULL,
cipher->nid == NID_undef ? "NULL"
: OBJ_nid2sn(cipher->nid),
"");
if (provciph == NULL)
return 0;
cipher = provciph;
EVP_CIPHER_free(ctx->fetched_cipher);
ctx->fetched_cipher = provciph;
#endif
}
if (cipher->prov != NULL) {
if (!EVP_CIPHER_up_ref((EVP_CIPHER *)cipher)) {
ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
return 0;
}
EVP_CIPHER_free(ctx->fetched_cipher);
ctx->fetched_cipher = (EVP_CIPHER *)cipher;
}
ctx->cipher = cipher;
if (ctx->algctx == NULL) {
ctx->algctx = ctx->cipher->newctx(ossl_provider_ctx(cipher->prov));
if (ctx->algctx == NULL) {
ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
return 0;
}
}
if ((ctx->flags & EVP_CIPH_NO_PADDING) != 0) {
/*
* If this ctx was already set up for no padding then we need to tell
* the new cipher about it.
*/
if (!EVP_CIPHER_CTX_set_padding(ctx, 0))
return 0;
}
if (enc) {
if (ctx->cipher->einit == NULL) {
ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
return 0;
}
return ctx->cipher->einit(ctx->algctx,
key,
key == NULL ? 0
: EVP_CIPHER_CTX_get_key_length(ctx),
iv,
iv == NULL ? 0
: EVP_CIPHER_CTX_get_iv_length(ctx),
params);
}
if (ctx->cipher->dinit == NULL) {
ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
return 0;
}
return ctx->cipher->dinit(ctx->algctx,
key,
key == NULL ? 0
: EVP_CIPHER_CTX_get_key_length(ctx),
iv,
iv == NULL ? 0
: EVP_CIPHER_CTX_get_iv_length(ctx),
params);
/* Code below to be removed when legacy support is dropped. */
legacy:
if (cipher != NULL) {
/*
* Ensure a context left lying around from last time is cleared (we
* previously attempted to avoid this if the same ENGINE and
* EVP_CIPHER could be used).
*/
if (ctx->cipher) {
unsigned long flags = ctx->flags;
EVP_CIPHER_CTX_reset(ctx);
/* Restore encrypt and flags */
ctx->encrypt = enc;
ctx->flags = flags;
}
#if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE)
if (impl != NULL) {
if (!ENGINE_init(impl)) {
ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
return 0;
}
} else {
impl = tmpimpl;
}
if (impl != NULL) {
/* There's an ENGINE for this job ... (apparently) */
const EVP_CIPHER *c = ENGINE_get_cipher(impl, cipher->nid);
if (c == NULL) {
/*
* One positive side-effect of US's export control history,
* is that we should at least be able to avoid using US
* misspellings of "initialisation"?
*/
ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
return 0;
}
/* We'll use the ENGINE's private cipher definition */
cipher = c;
/*
* Store the ENGINE functional reference so we know 'cipher' came
* from an ENGINE and we need to release it when done.
*/
ctx->engine = impl;
} else {
ctx->engine = NULL;
}
#endif
ctx->cipher = cipher;
if (ctx->cipher->ctx_size) {
ctx->cipher_data = OPENSSL_zalloc(ctx->cipher->ctx_size);
if (ctx->cipher_data == NULL) {
ctx->cipher = NULL;
ERR_raise(ERR_LIB_EVP, ERR_R_MALLOC_FAILURE);
return 0;
}
} else {
ctx->cipher_data = NULL;
}
ctx->key_len = cipher->key_len;
/* Preserve wrap enable flag, zero everything else */
ctx->flags &= EVP_CIPHER_CTX_FLAG_WRAP_ALLOW;
if (ctx->cipher->flags & EVP_CIPH_CTRL_INIT) {
if (!EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_INIT, 0, NULL)) {
ctx->cipher = NULL;
ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
return 0;
}
}
}
#if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE)
skip_to_init:
#endif
if (ctx->cipher == NULL)
return 0;
/* we assume block size is a power of 2 in *cryptUpdate */
OPENSSL_assert(ctx->cipher->block_size == 1
|| ctx->cipher->block_size == 8
|| ctx->cipher->block_size == 16);
if (!(ctx->flags & EVP_CIPHER_CTX_FLAG_WRAP_ALLOW)
&& EVP_CIPHER_CTX_get_mode(ctx) == EVP_CIPH_WRAP_MODE) {
ERR_raise(ERR_LIB_EVP, EVP_R_WRAP_MODE_NOT_ALLOWED);
return 0;
}
if ((EVP_CIPHER_get_flags(EVP_CIPHER_CTX_get0_cipher(ctx))
& EVP_CIPH_CUSTOM_IV) == 0) {
switch (EVP_CIPHER_CTX_get_mode(ctx)) {
case EVP_CIPH_STREAM_CIPHER:
case EVP_CIPH_ECB_MODE:
break;
case EVP_CIPH_CFB_MODE:
case EVP_CIPH_OFB_MODE:
ctx->num = 0;
/* fall-through */
case EVP_CIPH_CBC_MODE:
n = EVP_CIPHER_CTX_get_iv_length(ctx);
if (!ossl_assert(n >= 0 && n <= (int)sizeof(ctx->iv)))
return 0;
if (iv != NULL)
memcpy(ctx->oiv, iv, n);
memcpy(ctx->iv, ctx->oiv, n);
break;
case EVP_CIPH_CTR_MODE:
ctx->num = 0;
/* Don't reuse IV for CTR mode */
if (iv != NULL) {
if ((n = EVP_CIPHER_CTX_get_iv_length(ctx)) <= 0)
return 0;
memcpy(ctx->iv, iv, n);
}
break;
default:
return 0;
}
}
if (key != NULL || (ctx->cipher->flags & EVP_CIPH_ALWAYS_CALL_INIT)) {
if (!ctx->cipher->init(ctx, key, iv, enc))
return 0;
}
ctx->buf_len = 0;
ctx->final_used = 0;
ctx->block_mask = ctx->cipher->block_size - 1;
return 1;
}
int EVP_CipherInit_ex2(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher,
const unsigned char *key, const unsigned char *iv,
int enc, const OSSL_PARAM params[])
{
return evp_cipher_init_internal(ctx, cipher, NULL, key, iv, enc, params);
}
int EVP_CipherInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher,
const unsigned char *key, const unsigned char *iv, int enc)
{
if (cipher != NULL)
EVP_CIPHER_CTX_reset(ctx);
return evp_cipher_init_internal(ctx, cipher, NULL, key, iv, enc, NULL);
}
int EVP_CipherInit_ex(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher,
ENGINE *impl, const unsigned char *key,
const unsigned char *iv, int enc)
{
return evp_cipher_init_internal(ctx, cipher, impl, key, iv, enc, NULL);
}
int EVP_CipherUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl,
const unsigned char *in, int inl)
{
if (ctx->encrypt)
return EVP_EncryptUpdate(ctx, out, outl, in, inl);
else
return EVP_DecryptUpdate(ctx, out, outl, in, inl);
}
int EVP_CipherFinal_ex(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl)
{
if (ctx->encrypt)
return EVP_EncryptFinal_ex(ctx, out, outl);
else
return EVP_DecryptFinal_ex(ctx, out, outl);
}
int EVP_CipherFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl)
{
if (ctx->encrypt)
return EVP_EncryptFinal(ctx, out, outl);
else
return EVP_DecryptFinal(ctx, out, outl);
}
int EVP_EncryptInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher,
const unsigned char *key, const unsigned char *iv)
{
return EVP_CipherInit(ctx, cipher, key, iv, 1);
}
int EVP_EncryptInit_ex(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher,
ENGINE *impl, const unsigned char *key,
const unsigned char *iv)
{
return EVP_CipherInit_ex(ctx, cipher, impl, key, iv, 1);
}
int EVP_EncryptInit_ex2(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher,
const unsigned char *key, const unsigned char *iv,
const OSSL_PARAM params[])
{
return EVP_CipherInit_ex2(ctx, cipher, key, iv, 1, params);
}
int EVP_DecryptInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher,
const unsigned char *key, const unsigned char *iv)
{
return EVP_CipherInit(ctx, cipher, key, iv, 0);
}
int EVP_DecryptInit_ex(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher,
ENGINE *impl, const unsigned char *key,
const unsigned char *iv)
{
return EVP_CipherInit_ex(ctx, cipher, impl, key, iv, 0);
}
int EVP_DecryptInit_ex2(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher,
const unsigned char *key, const unsigned char *iv,
const OSSL_PARAM params[])
{
return EVP_CipherInit_ex2(ctx, cipher, key, iv, 0, params);
}
/*
* According to the letter of standard difference between pointers
* is specified to be valid only within same object. This makes
* it formally challenging to determine if input and output buffers
* are not partially overlapping with standard pointer arithmetic.
*/
#ifdef PTRDIFF_T
# undef PTRDIFF_T
#endif
#if defined(OPENSSL_SYS_VMS) && __INITIAL_POINTER_SIZE==64
/*
* Then we have VMS that distinguishes itself by adhering to
* sizeof(size_t)==4 even in 64-bit builds, which means that
* difference between two pointers might be truncated to 32 bits.
* In the context one can even wonder how comparison for
* equality is implemented. To be on the safe side we adhere to
* PTRDIFF_T even for comparison for equality.
*/
# define PTRDIFF_T uint64_t
#else
# define PTRDIFF_T size_t
#endif
int ossl_is_partially_overlapping(const void *ptr1, const void *ptr2, int len)
{
PTRDIFF_T diff = (PTRDIFF_T)ptr1-(PTRDIFF_T)ptr2;
/*
* Check for partially overlapping buffers. [Binary logical
* operations are used instead of boolean to minimize number
* of conditional branches.]
*/
int overlapped = (len > 0) & (diff != 0) & ((diff < (PTRDIFF_T)len) |
(diff > (0 - (PTRDIFF_T)len)));
return overlapped;
}
static int evp_EncryptDecryptUpdate(EVP_CIPHER_CTX *ctx,
unsigned char *out, int *outl,
const unsigned char *in, int inl)
{
int i, j, bl, cmpl = inl;
if (EVP_CIPHER_CTX_test_flags(ctx, EVP_CIPH_FLAG_LENGTH_BITS))
cmpl = (cmpl + 7) / 8;
bl = ctx->cipher->block_size;
if (ctx->cipher->flags & EVP_CIPH_FLAG_CUSTOM_CIPHER) {
/* If block size > 1 then the cipher will have to do this check */
if (bl == 1 && ossl_is_partially_overlapping(out, in, cmpl)) {
ERR_raise(ERR_LIB_EVP, EVP_R_PARTIALLY_OVERLAPPING);
return 0;
}
i = ctx->cipher->do_cipher(ctx, out, in, inl);
if (i < 0)
return 0;
else
*outl = i;
return 1;
}
if (inl <= 0) {
*outl = 0;
return inl == 0;
}
if (ossl_is_partially_overlapping(out + ctx->buf_len, in, cmpl)) {
ERR_raise(ERR_LIB_EVP, EVP_R_PARTIALLY_OVERLAPPING);
return 0;
}
if (ctx->buf_len == 0 && (inl & (ctx->block_mask)) == 0) {
if (ctx->cipher->do_cipher(ctx, out, in, inl)) {
*outl = inl;
return 1;
} else {
*outl = 0;
return 0;
}
}
i = ctx->buf_len;
OPENSSL_assert(bl <= (int)sizeof(ctx->buf));
if (i != 0) {
if (bl - i > inl) {
memcpy(&(ctx->buf[i]), in, inl);
ctx->buf_len += inl;
*outl = 0;
return 1;
} else {
j = bl - i;
/*
* Once we've processed the first j bytes from in, the amount of
* data left that is a multiple of the block length is:
* (inl - j) & ~(bl - 1)
* We must ensure that this amount of data, plus the one block that
* we process from ctx->buf does not exceed INT_MAX
*/
if (((inl - j) & ~(bl - 1)) > INT_MAX - bl) {
ERR_raise(ERR_LIB_EVP, EVP_R_OUTPUT_WOULD_OVERFLOW);
return 0;
}
memcpy(&(ctx->buf[i]), in, j);
inl -= j;
in += j;
if (!ctx->cipher->do_cipher(ctx, out, ctx->buf, bl))
return 0;
out += bl;
*outl = bl;
}
} else
*outl = 0;
i = inl & (bl - 1);
inl -= i;
if (inl > 0) {
if (!ctx->cipher->do_cipher(ctx, out, in, inl))
return 0;
*outl += inl;
}
if (i != 0)
memcpy(ctx->buf, &(in[inl]), i);
ctx->buf_len = i;
return 1;
}
int EVP_EncryptUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl,
const unsigned char *in, int inl)
{
int ret;
size_t soutl;
int blocksize;
if (outl != NULL) {
*outl = 0;
} else {
ERR_raise(ERR_LIB_EVP, ERR_R_PASSED_NULL_PARAMETER);
return 0;
}
/* Prevent accidental use of decryption context when encrypting */
if (!ctx->encrypt) {
ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_OPERATION);
return 0;
}
if (ctx->cipher == NULL) {
ERR_raise(ERR_LIB_EVP, EVP_R_NO_CIPHER_SET);
return 0;
}
if (ctx->cipher->prov == NULL)
goto legacy;
blocksize = ctx->cipher->block_size;
if (ctx->cipher->cupdate == NULL || blocksize < 1) {
ERR_raise(ERR_LIB_EVP, EVP_R_UPDATE_ERROR);
return 0;
}
ret = ctx->cipher->cupdate(ctx->algctx, out, &soutl,
inl + (blocksize == 1 ? 0 : blocksize), in,
(size_t)inl);
if (ret) {
if (soutl > INT_MAX) {
ERR_raise(ERR_LIB_EVP, EVP_R_UPDATE_ERROR);
return 0;
}
*outl = soutl;
}
return ret;
/* Code below to be removed when legacy support is dropped. */
legacy:
return evp_EncryptDecryptUpdate(ctx, out, outl, in, inl);
}
int EVP_EncryptFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl)
{
int ret;
ret = EVP_EncryptFinal_ex(ctx, out, outl);
return ret;
}
int EVP_EncryptFinal_ex(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl)
{
int n, ret;
unsigned int i, b, bl;
size_t soutl;
int blocksize;
if (outl != NULL) {
*outl = 0;
} else {
ERR_raise(ERR_LIB_EVP, ERR_R_PASSED_NULL_PARAMETER);
return 0;
}
/* Prevent accidental use of decryption context when encrypting */
if (!ctx->encrypt) {
ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_OPERATION);
return 0;
}
if (ctx->cipher == NULL) {
ERR_raise(ERR_LIB_EVP, EVP_R_NO_CIPHER_SET);
return 0;
}
if (ctx->cipher->prov == NULL)
goto legacy;
blocksize = EVP_CIPHER_CTX_get_block_size(ctx);
if (blocksize < 1 || ctx->cipher->cfinal == NULL) {
ERR_raise(ERR_LIB_EVP, EVP_R_FINAL_ERROR);
return 0;
}
ret = ctx->cipher->cfinal(ctx->algctx, out, &soutl,
blocksize == 1 ? 0 : blocksize);
if (ret) {
if (soutl > INT_MAX) {
ERR_raise(ERR_LIB_EVP, EVP_R_FINAL_ERROR);
return 0;
}
*outl = soutl;
}
return ret;
/* Code below to be removed when legacy support is dropped. */
legacy:
if (ctx->cipher->flags & EVP_CIPH_FLAG_CUSTOM_CIPHER) {
ret = ctx->cipher->do_cipher(ctx, out, NULL, 0);
if (ret < 0)
return 0;
else
*outl = ret;
return 1;
}
b = ctx->cipher->block_size;
OPENSSL_assert(b <= sizeof(ctx->buf));
if (b == 1) {
*outl = 0;
return 1;
}
bl = ctx->buf_len;
if (ctx->flags & EVP_CIPH_NO_PADDING) {
if (bl) {
ERR_raise(ERR_LIB_EVP, EVP_R_DATA_NOT_MULTIPLE_OF_BLOCK_LENGTH);
return 0;
}
*outl = 0;
return 1;
}
n = b - bl;
for (i = bl; i < b; i++)
ctx->buf[i] = n;
ret = ctx->cipher->do_cipher(ctx, out, ctx->buf, b);
if (ret)
*outl = b;
return ret;
}
int EVP_DecryptUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl,
const unsigned char *in, int inl)
{
int fix_len, cmpl = inl, ret;
unsigned int b;
size_t soutl;
int blocksize;
if (outl != NULL) {
*outl = 0;
} else {
ERR_raise(ERR_LIB_EVP, ERR_R_PASSED_NULL_PARAMETER);
return 0;
}
/* Prevent accidental use of encryption context when decrypting */
if (ctx->encrypt) {
ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_OPERATION);
return 0;
}
if (ctx->cipher == NULL) {
ERR_raise(ERR_LIB_EVP, EVP_R_NO_CIPHER_SET);
return 0;
}
if (ctx->cipher->prov == NULL)
goto legacy;
blocksize = EVP_CIPHER_CTX_get_block_size(ctx);
if (ctx->cipher->cupdate == NULL || blocksize < 1) {
ERR_raise(ERR_LIB_EVP, EVP_R_UPDATE_ERROR);
return 0;
}
ret = ctx->cipher->cupdate(ctx->algctx, out, &soutl,
inl + (blocksize == 1 ? 0 : blocksize), in,
(size_t)inl);
if (ret) {
if (soutl > INT_MAX) {
ERR_raise(ERR_LIB_EVP, EVP_R_UPDATE_ERROR);
return 0;
}
*outl = soutl;
}
return ret;
/* Code below to be removed when legacy support is dropped. */
legacy:
b = ctx->cipher->block_size;
if (EVP_CIPHER_CTX_test_flags(ctx, EVP_CIPH_FLAG_LENGTH_BITS))
cmpl = (cmpl + 7) / 8;
if (ctx->cipher->flags & EVP_CIPH_FLAG_CUSTOM_CIPHER) {
if (b == 1 && ossl_is_partially_overlapping(out, in, cmpl)) {
ERR_raise(ERR_LIB_EVP, EVP_R_PARTIALLY_OVERLAPPING);
return 0;
}
fix_len = ctx->cipher->do_cipher(ctx, out, in, inl);
if (fix_len < 0) {
*outl = 0;
return 0;
} else
*outl = fix_len;
return 1;
}
if (inl <= 0) {
*outl = 0;
return inl == 0;
}
if (ctx->flags & EVP_CIPH_NO_PADDING)
return evp_EncryptDecryptUpdate(ctx, out, outl, in, inl);
OPENSSL_assert(b <= sizeof(ctx->final));
if (ctx->final_used) {
/* see comment about PTRDIFF_T comparison above */
if (((PTRDIFF_T)out == (PTRDIFF_T)in)
|| ossl_is_partially_overlapping(out, in, b)) {
ERR_raise(ERR_LIB_EVP, EVP_R_PARTIALLY_OVERLAPPING);
return 0;
}
/*
* final_used is only ever set if buf_len is 0. Therefore the maximum
* length output we will ever see from evp_EncryptDecryptUpdate is
* the maximum multiple of the block length that is <= inl, or just:
* inl & ~(b - 1)
* Since final_used has been set then the final output length is:
* (inl & ~(b - 1)) + b
* This must never exceed INT_MAX
*/
if ((inl & ~(b - 1)) > INT_MAX - b) {
ERR_raise(ERR_LIB_EVP, EVP_R_OUTPUT_WOULD_OVERFLOW);
return 0;
}
memcpy(out, ctx->final, b);
out += b;
fix_len = 1;
} else
fix_len = 0;
if (!evp_EncryptDecryptUpdate(ctx, out, outl, in, inl))
return 0;
/*
* if we have 'decrypted' a multiple of block size, make sure we have a
* copy of this last block
*/
if (b > 1 && !ctx->buf_len) {
*outl -= b;
ctx->final_used = 1;
memcpy(ctx->final, &out[*outl], b);
} else
ctx->final_used = 0;
if (fix_len)
*outl += b;
return 1;
}
int EVP_DecryptFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl)
{
int ret;
ret = EVP_DecryptFinal_ex(ctx, out, outl);
return ret;
}
int EVP_DecryptFinal_ex(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl)
{
int i, n;
unsigned int b;
size_t soutl;
int ret;
int blocksize;
if (outl != NULL) {
*outl = 0;
} else {
ERR_raise(ERR_LIB_EVP, ERR_R_PASSED_NULL_PARAMETER);
return 0;
}
/* Prevent accidental use of encryption context when decrypting */
if (ctx->encrypt) {
ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_OPERATION);
return 0;
}
if (ctx->cipher == NULL) {
ERR_raise(ERR_LIB_EVP, EVP_R_NO_CIPHER_SET);
return 0;
}
if (ctx->cipher->prov == NULL)
goto legacy;
blocksize = EVP_CIPHER_CTX_get_block_size(ctx);
if (blocksize < 1 || ctx->cipher->cfinal == NULL) {
ERR_raise(ERR_LIB_EVP, EVP_R_FINAL_ERROR);
return 0;
}
ret = ctx->cipher->cfinal(ctx->algctx, out, &soutl,
blocksize == 1 ? 0 : blocksize);
if (ret) {
if (soutl > INT_MAX) {
ERR_raise(ERR_LIB_EVP, EVP_R_FINAL_ERROR);
return 0;
}
*outl = soutl;
}
return ret;
/* Code below to be removed when legacy support is dropped. */
legacy:
*outl = 0;
if (ctx->cipher->flags & EVP_CIPH_FLAG_CUSTOM_CIPHER) {
i = ctx->cipher->do_cipher(ctx, out, NULL, 0);
if (i < 0)
return 0;
else
*outl = i;
return 1;
}
b = ctx->cipher->block_size;
if (ctx->flags & EVP_CIPH_NO_PADDING) {
if (ctx->buf_len) {
ERR_raise(ERR_LIB_EVP, EVP_R_DATA_NOT_MULTIPLE_OF_BLOCK_LENGTH);
return 0;
}
*outl = 0;
return 1;
}
if (b > 1) {
if (ctx->buf_len || !ctx->final_used) {
ERR_raise(ERR_LIB_EVP, EVP_R_WRONG_FINAL_BLOCK_LENGTH);
return 0;
}
OPENSSL_assert(b <= sizeof(ctx->final));
/*
* The following assumes that the ciphertext has been authenticated.
* Otherwise it provides a padding oracle.
*/
n = ctx->final[b - 1];
if (n == 0 || n > (int)b) {
ERR_raise(ERR_LIB_EVP, EVP_R_BAD_DECRYPT);
return 0;
}
for (i = 0; i < n; i++) {
if (ctx->final[--b] != n) {
ERR_raise(ERR_LIB_EVP, EVP_R_BAD_DECRYPT);
return 0;
}
}
n = ctx->cipher->block_size - n;
for (i = 0; i < n; i++)
out[i] = ctx->final[i];
*outl = n;
} else
*outl = 0;
return 1;
}
int EVP_CIPHER_CTX_set_key_length(EVP_CIPHER_CTX *c, int keylen)
{
if (c->cipher->prov != NULL) {
int ok;
OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END };
size_t len = keylen;
if (EVP_CIPHER_CTX_get_key_length(c) == keylen)
return 1;
/* Check the cipher actually understands this parameter */
if (OSSL_PARAM_locate_const(EVP_CIPHER_settable_ctx_params(c->cipher),
OSSL_CIPHER_PARAM_KEYLEN) == NULL) {
ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_KEY_LENGTH);
return 0;
}
params[0] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_KEYLEN, &len);
ok = evp_do_ciph_ctx_setparams(c->cipher, c->algctx, params);
return ok > 0 ? 1 : 0;
}
/* Code below to be removed when legacy support is dropped. */
/*
* Note there have never been any built-in ciphers that define this flag
* since it was first introduced.
*/
if (c->cipher->flags & EVP_CIPH_CUSTOM_KEY_LENGTH)
return EVP_CIPHER_CTX_ctrl(c, EVP_CTRL_SET_KEY_LENGTH, keylen, NULL);
if (EVP_CIPHER_CTX_get_key_length(c) == keylen)
return 1;
if ((keylen > 0) && (c->cipher->flags & EVP_CIPH_VARIABLE_LENGTH)) {
c->key_len = keylen;
return 1;
}
ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_KEY_LENGTH);
return 0;
}
int EVP_CIPHER_CTX_set_padding(EVP_CIPHER_CTX *ctx, int pad)
{
int ok;
OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END };
unsigned int pd = pad;
if (pad)
ctx->flags &= ~EVP_CIPH_NO_PADDING;
else
ctx->flags |= EVP_CIPH_NO_PADDING;
if (ctx->cipher != NULL && ctx->cipher->prov == NULL)
return 1;
params[0] = OSSL_PARAM_construct_uint(OSSL_CIPHER_PARAM_PADDING, &pd);
ok = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->algctx, params);
return ok != 0;
}
int EVP_CIPHER_CTX_ctrl(EVP_CIPHER_CTX *ctx, int type, int arg, void *ptr)
{
int ret = EVP_CTRL_RET_UNSUPPORTED;
int set_params = 1;
size_t sz = arg;
unsigned int i;
OSSL_PARAM params[4] = {
OSSL_PARAM_END, OSSL_PARAM_END, OSSL_PARAM_END, OSSL_PARAM_END
};
if (ctx == NULL || ctx->cipher == NULL) {
ERR_raise(ERR_LIB_EVP, EVP_R_NO_CIPHER_SET);
return 0;
}
if (ctx->cipher->prov == NULL)
goto legacy;
switch (type) {
case EVP_CTRL_SET_KEY_LENGTH:
params[0] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_KEYLEN, &sz);
break;
case EVP_CTRL_RAND_KEY: /* Used by DES */
set_params = 0;
params[0] =
OSSL_PARAM_construct_octet_string(OSSL_CIPHER_PARAM_RANDOM_KEY,
ptr, sz);
break;
case EVP_CTRL_INIT:
/*
* EVP_CTRL_INIT is purely legacy, no provider counterpart.
* As a matter of fact, this should be dead code, but some caller
* might still do a direct control call with this command, so...
* Legacy methods return 1 except for exceptional circumstances, so
* we do the same here to not be disruptive.
*/
return 1;
case EVP_CTRL_SET_PIPELINE_OUTPUT_BUFS: /* Used by DASYNC */
default:
goto end;
case EVP_CTRL_AEAD_SET_IVLEN:
if (arg < 0)
return 0;
params[0] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_IVLEN, &sz);
break;
case EVP_CTRL_CCM_SET_L:
if (arg < 2 || arg > 8)
return 0;
sz = 15 - arg;
params[0] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_IVLEN, &sz);
break;
case EVP_CTRL_AEAD_SET_IV_FIXED:
params[0] = OSSL_PARAM_construct_octet_string(
OSSL_CIPHER_PARAM_AEAD_TLS1_IV_FIXED, ptr, sz);
break;
case EVP_CTRL_GCM_IV_GEN:
set_params = 0;
if (arg < 0)
sz = 0; /* special case that uses the iv length */
params[0] = OSSL_PARAM_construct_octet_string(
OSSL_CIPHER_PARAM_AEAD_TLS1_GET_IV_GEN, ptr, sz);
break;
case EVP_CTRL_GCM_SET_IV_INV:
if (arg < 0)
return 0;
params[0] = OSSL_PARAM_construct_octet_string(
OSSL_CIPHER_PARAM_AEAD_TLS1_SET_IV_INV, ptr, sz);
break;
case EVP_CTRL_GET_RC5_ROUNDS:
set_params = 0; /* Fall thru */
case EVP_CTRL_SET_RC5_ROUNDS:
if (arg < 0)
return 0;
i = (unsigned int)arg;
params[0] = OSSL_PARAM_construct_uint(OSSL_CIPHER_PARAM_ROUNDS, &i);
break;
case EVP_CTRL_SET_SPEED:
if (arg < 0)
return 0;
i = (unsigned int)arg;
params[0] = OSSL_PARAM_construct_uint(OSSL_CIPHER_PARAM_SPEED, &i);
break;
case EVP_CTRL_AEAD_GET_TAG:
set_params = 0; /* Fall thru */
case EVP_CTRL_AEAD_SET_TAG:
params[0] = OSSL_PARAM_construct_octet_string(OSSL_CIPHER_PARAM_AEAD_TAG,
ptr, sz);
break;
case EVP_CTRL_AEAD_TLS1_AAD:
/* This one does a set and a get - since it returns a size */
params[0] =
OSSL_PARAM_construct_octet_string(OSSL_CIPHER_PARAM_AEAD_TLS1_AAD,
ptr, sz);
ret = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->algctx, params);
if (ret <= 0)
goto end;
params[0] =
OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_AEAD_TLS1_AAD_PAD, &sz);
ret = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->algctx, params);
if (ret <= 0)
goto end;
return sz;
#ifndef OPENSSL_NO_RC2
case EVP_CTRL_GET_RC2_KEY_BITS:
set_params = 0; /* Fall thru */
case EVP_CTRL_SET_RC2_KEY_BITS:
params[0] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_RC2_KEYBITS, &sz);
break;
#endif /* OPENSSL_NO_RC2 */
#if !defined(OPENSSL_NO_MULTIBLOCK)
case EVP_CTRL_TLS1_1_MULTIBLOCK_MAX_BUFSIZE:
params[0] = OSSL_PARAM_construct_size_t(
OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_MAX_SEND_FRAGMENT, &sz);
ret = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->algctx, params);
if (ret <= 0)
return 0;
params[0] = OSSL_PARAM_construct_size_t(
OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_MAX_BUFSIZE, &sz);
params[1] = OSSL_PARAM_construct_end();
ret = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->algctx, params);
if (ret <= 0)
return 0;
return sz;
case EVP_CTRL_TLS1_1_MULTIBLOCK_AAD: {
EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM *p =
(EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM *)ptr;
if (arg < (int)sizeof(EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM))
return 0;
params[0] = OSSL_PARAM_construct_octet_string(
OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_AAD, (void*)p->inp, p->len);
params[1] = OSSL_PARAM_construct_uint(
OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_INTERLEAVE, &p->interleave);
ret = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->algctx, params);
if (ret <= 0)
return ret;
/* Retrieve the return values changed by the set */
params[0] = OSSL_PARAM_construct_size_t(
OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_AAD_PACKLEN, &sz);
params[1] = OSSL_PARAM_construct_uint(
OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_INTERLEAVE, &p->interleave);
params[2] = OSSL_PARAM_construct_end();
ret = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->algctx, params);
if (ret <= 0)
return 0;
return sz;
}
case EVP_CTRL_TLS1_1_MULTIBLOCK_ENCRYPT: {
EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM *p =
(EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM *)ptr;
params[0] = OSSL_PARAM_construct_octet_string(
OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_ENC, p->out, p->len);
params[1] = OSSL_PARAM_construct_octet_string(
OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_ENC_IN, (void*)p->inp,
p->len);
params[2] = OSSL_PARAM_construct_uint(
OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_INTERLEAVE, &p->interleave);
ret = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->algctx, params);
if (ret <= 0)
return ret;
params[0] = OSSL_PARAM_construct_size_t(
OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_ENC_LEN, &sz);
params[1] = OSSL_PARAM_construct_end();
ret = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->algctx, params);
if (ret <= 0)
return 0;
return sz;
}
#endif /* OPENSSL_NO_MULTIBLOCK */
case EVP_CTRL_AEAD_SET_MAC_KEY:
if (arg < 0)
return -1;
params[0] = OSSL_PARAM_construct_octet_string(
OSSL_CIPHER_PARAM_AEAD_MAC_KEY, ptr, sz);
break;
}
if (set_params)
ret = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->algctx, params);
else
ret = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->algctx, params);
goto end;
/* Code below to be removed when legacy support is dropped. */
legacy:
if (ctx->cipher->ctrl == NULL) {
ERR_raise(ERR_LIB_EVP, EVP_R_CTRL_NOT_IMPLEMENTED);
return 0;
}
ret = ctx->cipher->ctrl(ctx, type, arg, ptr);
end:
if (ret == EVP_CTRL_RET_UNSUPPORTED) {
ERR_raise(ERR_LIB_EVP, EVP_R_CTRL_OPERATION_NOT_IMPLEMENTED);
return 0;
}
return ret;
}
int EVP_CIPHER_get_params(EVP_CIPHER *cipher, OSSL_PARAM params[])
{
if (cipher != NULL && cipher->get_params != NULL)
return cipher->get_params(params);
return 0;
}
int EVP_CIPHER_CTX_set_params(EVP_CIPHER_CTX *ctx, const OSSL_PARAM params[])
{
if (ctx->cipher != NULL && ctx->cipher->set_ctx_params != NULL)
return ctx->cipher->set_ctx_params(ctx->algctx, params);
return 0;
}
int EVP_CIPHER_CTX_get_params(EVP_CIPHER_CTX *ctx, OSSL_PARAM params[])
{
if (ctx->cipher != NULL && ctx->cipher->get_ctx_params != NULL)
return ctx->cipher->get_ctx_params(ctx->algctx, params);
return 0;
}
const OSSL_PARAM *EVP_CIPHER_gettable_params(const EVP_CIPHER *cipher)
{
if (cipher != NULL && cipher->gettable_params != NULL)
return cipher->gettable_params(
ossl_provider_ctx(EVP_CIPHER_get0_provider(cipher)));
return NULL;
}
const OSSL_PARAM *EVP_CIPHER_settable_ctx_params(const EVP_CIPHER *cipher)
{
void *provctx;
if (cipher != NULL && cipher->settable_ctx_params != NULL) {
provctx = ossl_provider_ctx(EVP_CIPHER_get0_provider(cipher));
return cipher->settable_ctx_params(NULL, provctx);
}
return NULL;
}
const OSSL_PARAM *EVP_CIPHER_gettable_ctx_params(const EVP_CIPHER *cipher)
{
void *provctx;
if (cipher != NULL && cipher->gettable_ctx_params != NULL) {
provctx = ossl_provider_ctx(EVP_CIPHER_get0_provider(cipher));
return cipher->gettable_ctx_params(NULL, provctx);
}
return NULL;
}
const OSSL_PARAM *EVP_CIPHER_CTX_settable_params(EVP_CIPHER_CTX *cctx)
{
void *alg;
if (cctx != NULL && cctx->cipher->settable_ctx_params != NULL) {
alg = ossl_provider_ctx(EVP_CIPHER_get0_provider(cctx->cipher));
return cctx->cipher->settable_ctx_params(cctx->algctx, alg);
}
return NULL;
}
const OSSL_PARAM *EVP_CIPHER_CTX_gettable_params(EVP_CIPHER_CTX *cctx)
{
void *provctx;
if (cctx != NULL && cctx->cipher->gettable_ctx_params != NULL) {
provctx = ossl_provider_ctx(EVP_CIPHER_get0_provider(cctx->cipher));
return cctx->cipher->gettable_ctx_params(cctx->algctx, provctx);
}
return NULL;
}
#ifndef FIPS_MODULE
static OSSL_LIB_CTX *EVP_CIPHER_CTX_get_libctx(EVP_CIPHER_CTX *ctx)
{
const EVP_CIPHER *cipher = ctx->cipher;
const OSSL_PROVIDER *prov;
if (cipher == NULL)
return NULL;
prov = EVP_CIPHER_get0_provider(cipher);
return ossl_provider_libctx(prov);
}
#endif
int EVP_CIPHER_CTX_rand_key(EVP_CIPHER_CTX *ctx, unsigned char *key)
{
if (ctx->cipher->flags & EVP_CIPH_RAND_KEY)
return EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_RAND_KEY, 0, key);
#ifdef FIPS_MODULE
return 0;
#else
{
int kl;
OSSL_LIB_CTX *libctx = EVP_CIPHER_CTX_get_libctx(ctx);
kl = EVP_CIPHER_CTX_get_key_length(ctx);
if (kl <= 0 || RAND_priv_bytes_ex(libctx, key, kl, 0) <= 0)
return 0;
return 1;
}
#endif /* FIPS_MODULE */
}
EVP_CIPHER_CTX *EVP_CIPHER_CTX_dup(const EVP_CIPHER_CTX *in)
{
EVP_CIPHER_CTX *out = EVP_CIPHER_CTX_new();
if (out != NULL && !EVP_CIPHER_CTX_copy(out, in)) {
EVP_CIPHER_CTX_free(out);
out = NULL;
}
return out;
}
int EVP_CIPHER_CTX_copy(EVP_CIPHER_CTX *out, const EVP_CIPHER_CTX *in)
{
if ((in == NULL) || (in->cipher == NULL)) {
ERR_raise(ERR_LIB_EVP, EVP_R_INPUT_NOT_INITIALIZED);
return 0;
}
if (in->cipher->prov == NULL)
goto legacy;
if (in->cipher->dupctx == NULL) {
ERR_raise(ERR_LIB_EVP, EVP_R_NOT_ABLE_TO_COPY_CTX);
return 0;
}
EVP_CIPHER_CTX_reset(out);
*out = *in;
out->algctx = NULL;
if (in->fetched_cipher != NULL && !EVP_CIPHER_up_ref(in->fetched_cipher)) {
out->fetched_cipher = NULL;
return 0;
}
out->algctx = in->cipher->dupctx(in->algctx);
if (out->algctx == NULL) {
ERR_raise(ERR_LIB_EVP, EVP_R_NOT_ABLE_TO_COPY_CTX);
return 0;
}
return 1;
/* Code below to be removed when legacy support is dropped. */
legacy:
#if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE)
/* Make sure it's safe to copy a cipher context using an ENGINE */
if (in->engine && !ENGINE_init(in->engine)) {
ERR_raise(ERR_LIB_EVP, ERR_R_ENGINE_LIB);
return 0;
}
#endif
EVP_CIPHER_CTX_reset(out);
memcpy(out, in, sizeof(*out));
if (in->cipher_data && in->cipher->ctx_size) {
out->cipher_data = OPENSSL_malloc(in->cipher->ctx_size);
if (out->cipher_data == NULL) {
out->cipher = NULL;
ERR_raise(ERR_LIB_EVP, ERR_R_MALLOC_FAILURE);
return 0;
}
memcpy(out->cipher_data, in->cipher_data, in->cipher->ctx_size);
}
if (in->cipher->flags & EVP_CIPH_CUSTOM_COPY)
if (!in->cipher->ctrl((EVP_CIPHER_CTX *)in, EVP_CTRL_COPY, 0, out)) {
out->cipher = NULL;
ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
return 0;
}
return 1;
}
EVP_CIPHER *evp_cipher_new(void)
{
EVP_CIPHER *cipher = OPENSSL_zalloc(sizeof(EVP_CIPHER));
if (cipher != NULL) {
cipher->lock = CRYPTO_THREAD_lock_new();
if (cipher->lock == NULL) {
OPENSSL_free(cipher);
return NULL;
}
cipher->refcnt = 1;
}
return cipher;
}
/*
* FIPS module note: since internal fetches will be entirely
* provider based, we know that none of its code depends on legacy
* NIDs or any functionality that use them.
*/
#ifndef FIPS_MODULE
/* After removal of legacy support get rid of the need for legacy NIDs */
static void set_legacy_nid(const char *name, void *vlegacy_nid)
{
int nid;
int *legacy_nid = vlegacy_nid;
/*
* We use lowest level function to get the associated method, because
* higher level functions such as EVP_get_cipherbyname() have changed
* to look at providers too.
*/
const void *legacy_method = OBJ_NAME_get(name, OBJ_NAME_TYPE_CIPHER_METH);
if (*legacy_nid == -1) /* We found a clash already */
return;
if (legacy_method == NULL)
return;
nid = EVP_CIPHER_get_nid(legacy_method);
if (*legacy_nid != NID_undef && *legacy_nid != nid) {
*legacy_nid = -1;
return;
}
*legacy_nid = nid;
}
#endif
static void *evp_cipher_from_algorithm(const int name_id,
const OSSL_ALGORITHM *algodef,
OSSL_PROVIDER *prov)
{
const OSSL_DISPATCH *fns = algodef->implementation;
EVP_CIPHER *cipher = NULL;
int fnciphcnt = 0, fnctxcnt = 0;
if ((cipher = evp_cipher_new()) == NULL) {
ERR_raise(ERR_LIB_EVP, ERR_R_MALLOC_FAILURE);
return NULL;
}
#ifndef FIPS_MODULE
cipher->nid = NID_undef;
if (!evp_names_do_all(prov, name_id, set_legacy_nid, &cipher->nid)
|| cipher->nid == -1) {
ERR_raise(ERR_LIB_EVP, ERR_R_INTERNAL_ERROR);
EVP_CIPHER_free(cipher);
return NULL;
}
#endif
cipher->name_id = name_id;
if ((cipher->type_name = ossl_algorithm_get1_first_name(algodef)) == NULL) {
EVP_CIPHER_free(cipher);
return NULL;
}
cipher->description = algodef->algorithm_description;
for (; fns->function_id != 0; fns++) {
switch (fns->function_id) {
case OSSL_FUNC_CIPHER_NEWCTX:
if (cipher->newctx != NULL)
break;
cipher->newctx = OSSL_FUNC_cipher_newctx(fns);
fnctxcnt++;
break;
case OSSL_FUNC_CIPHER_ENCRYPT_INIT:
if (cipher->einit != NULL)
break;
cipher->einit = OSSL_FUNC_cipher_encrypt_init(fns);
fnciphcnt++;
break;
case OSSL_FUNC_CIPHER_DECRYPT_INIT:
if (cipher->dinit != NULL)
break;
cipher->dinit = OSSL_FUNC_cipher_decrypt_init(fns);
fnciphcnt++;
break;
case OSSL_FUNC_CIPHER_UPDATE:
if (cipher->cupdate != NULL)
break;
cipher->cupdate = OSSL_FUNC_cipher_update(fns);
fnciphcnt++;
break;
case OSSL_FUNC_CIPHER_FINAL:
if (cipher->cfinal != NULL)
break;
cipher->cfinal = OSSL_FUNC_cipher_final(fns);
fnciphcnt++;
break;
case OSSL_FUNC_CIPHER_CIPHER:
if (cipher->ccipher != NULL)
break;
cipher->ccipher = OSSL_FUNC_cipher_cipher(fns);
break;
case OSSL_FUNC_CIPHER_FREECTX:
if (cipher->freectx != NULL)
break;
cipher->freectx = OSSL_FUNC_cipher_freectx(fns);
fnctxcnt++;
break;
case OSSL_FUNC_CIPHER_DUPCTX:
if (cipher->dupctx != NULL)
break;
cipher->dupctx = OSSL_FUNC_cipher_dupctx(fns);
break;
case OSSL_FUNC_CIPHER_GET_PARAMS:
if (cipher->get_params != NULL)
break;
cipher->get_params = OSSL_FUNC_cipher_get_params(fns);
break;
case OSSL_FUNC_CIPHER_GET_CTX_PARAMS:
if (cipher->get_ctx_params != NULL)
break;
cipher->get_ctx_params = OSSL_FUNC_cipher_get_ctx_params(fns);
break;
case OSSL_FUNC_CIPHER_SET_CTX_PARAMS:
if (cipher->set_ctx_params != NULL)
break;
cipher->set_ctx_params = OSSL_FUNC_cipher_set_ctx_params(fns);
break;
case OSSL_FUNC_CIPHER_GETTABLE_PARAMS:
if (cipher->gettable_params != NULL)
break;
cipher->gettable_params = OSSL_FUNC_cipher_gettable_params(fns);
break;
case OSSL_FUNC_CIPHER_GETTABLE_CTX_PARAMS:
if (cipher->gettable_ctx_params != NULL)
break;
cipher->gettable_ctx_params =
OSSL_FUNC_cipher_gettable_ctx_params(fns);
break;
case OSSL_FUNC_CIPHER_SETTABLE_CTX_PARAMS:
if (cipher->settable_ctx_params != NULL)
break;
cipher->settable_ctx_params =
OSSL_FUNC_cipher_settable_ctx_params(fns);
break;
}
}
if ((fnciphcnt != 0 && fnciphcnt != 3 && fnciphcnt != 4)
|| (fnciphcnt == 0 && cipher->ccipher == NULL)
|| fnctxcnt != 2) {
/*
* In order to be a consistent set of functions we must have at least
* a complete set of "encrypt" functions, or a complete set of "decrypt"
* functions, or a single "cipher" function. In all cases we need both
* the "newctx" and "freectx" functions.
*/
EVP_CIPHER_free(cipher);
ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_PROVIDER_FUNCTIONS);
return NULL;
}
cipher->prov = prov;
if (prov != NULL)
ossl_provider_up_ref(prov);
if (!evp_cipher_cache_constants(cipher)) {
EVP_CIPHER_free(cipher);
ERR_raise(ERR_LIB_EVP, EVP_R_CACHE_CONSTANTS_FAILED);
cipher = NULL;
}
return cipher;
}
static int evp_cipher_up_ref(void *cipher)
{
return EVP_CIPHER_up_ref(cipher);
}
static void evp_cipher_free(void *cipher)
{
EVP_CIPHER_free(cipher);
}
EVP_CIPHER *EVP_CIPHER_fetch(OSSL_LIB_CTX *ctx, const char *algorithm,
const char *properties)
{
EVP_CIPHER *cipher =
evp_generic_fetch(ctx, OSSL_OP_CIPHER, algorithm, properties,
evp_cipher_from_algorithm, evp_cipher_up_ref,
evp_cipher_free);
return cipher;
}
int EVP_CIPHER_up_ref(EVP_CIPHER *cipher)
{
int ref = 0;
if (cipher->origin == EVP_ORIG_DYNAMIC)
CRYPTO_UP_REF(&cipher->refcnt, &ref, cipher->lock);
return 1;
}
void evp_cipher_free_int(EVP_CIPHER *cipher)
{
OPENSSL_free(cipher->type_name);
ossl_provider_free(cipher->prov);
CRYPTO_THREAD_lock_free(cipher->lock);
OPENSSL_free(cipher);
}
void EVP_CIPHER_free(EVP_CIPHER *cipher)
{
int i;
if (cipher == NULL || cipher->origin != EVP_ORIG_DYNAMIC)
return;
CRYPTO_DOWN_REF(&cipher->refcnt, &i, cipher->lock);
if (i > 0)
return;
evp_cipher_free_int(cipher);
}
void EVP_CIPHER_do_all_provided(OSSL_LIB_CTX *libctx,
void (*fn)(EVP_CIPHER *mac, void *arg),
void *arg)
{
evp_generic_do_all(libctx, OSSL_OP_CIPHER,
(void (*)(void *, void *))fn, arg,
evp_cipher_from_algorithm, evp_cipher_up_ref,
evp_cipher_free);
}
|