-
Notifications
You must be signed in to change notification settings - Fork 110
/
otx2_cptvf_algs.c
1759 lines (1513 loc) · 45.9 KB
/
otx2_cptvf_algs.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
// SPDX-License-Identifier: GPL-2.0-only
/* Copyright (C) 2020 Marvell. */
#include <crypto/aes.h>
#include <crypto/authenc.h>
#include <crypto/cryptd.h>
#include <crypto/des.h>
#include <crypto/internal/aead.h>
#include <crypto/sha1.h>
#include <crypto/sha2.h>
#include <crypto/xts.h>
#include <crypto/gcm.h>
#include <crypto/scatterwalk.h>
#include <linux/rtnetlink.h>
#include <linux/sort.h>
#include <linux/module.h>
#include "otx2_cptvf.h"
#include "otx2_cptvf_algs.h"
#include "otx2_cpt_reqmgr.h"
/* Size of salt in AES GCM mode */
#define AES_GCM_SALT_SIZE 4
/* Size of IV in AES GCM mode */
#define AES_GCM_IV_SIZE 8
/* Size of ICV (Integrity Check Value) in AES GCM mode */
#define AES_GCM_ICV_SIZE 16
/* Offset of IV in AES GCM mode */
#define AES_GCM_IV_OFFSET 8
#define CONTROL_WORD_LEN 8
#define KEY2_OFFSET 48
#define DMA_MODE_FLAG(dma_mode) \
(((dma_mode) == OTX2_CPT_DMA_MODE_SG) ? (1 << 7) : 0)
/* Truncated SHA digest size */
#define SHA1_TRUNC_DIGEST_SIZE 12
#define SHA256_TRUNC_DIGEST_SIZE 16
#define SHA384_TRUNC_DIGEST_SIZE 24
#define SHA512_TRUNC_DIGEST_SIZE 32
static DEFINE_MUTEX(mutex);
static int is_crypto_registered;
struct cpt_device_desc {
struct pci_dev *dev;
int num_queues;
};
struct cpt_device_table {
atomic_t count;
struct cpt_device_desc desc[OTX2_CPT_MAX_LFS_NUM];
};
static struct cpt_device_table se_devices = {
.count = ATOMIC_INIT(0)
};
static inline int get_se_device(struct pci_dev **pdev, int *cpu_num)
{
int count;
count = atomic_read(&se_devices.count);
if (count < 1)
return -ENODEV;
*cpu_num = get_cpu();
/*
* On OcteonTX2 platform CPT instruction queue is bound to each
* local function LF, in turn LFs can be attached to PF
* or VF therefore we always use first device. We get maximum
* performance if one CPT queue is available for each cpu
* otherwise CPT queues need to be shared between cpus.
*/
if (*cpu_num >= se_devices.desc[0].num_queues)
*cpu_num %= se_devices.desc[0].num_queues;
*pdev = se_devices.desc[0].dev;
put_cpu();
return 0;
}
static inline int validate_hmac_cipher_null(struct otx2_cpt_req_info *cpt_req)
{
struct otx2_cpt_req_ctx *rctx;
struct aead_request *req;
struct crypto_aead *tfm;
req = container_of(cpt_req->areq, struct aead_request, base);
tfm = crypto_aead_reqtfm(req);
rctx = aead_request_ctx(req);
if (memcmp(rctx->fctx.hmac.s.hmac_calc,
rctx->fctx.hmac.s.hmac_recv,
crypto_aead_authsize(tfm)) != 0)
return -EBADMSG;
return 0;
}
static void otx2_cpt_aead_callback(int status, void *arg1, void *arg2)
{
struct otx2_cpt_inst_info *inst_info = arg2;
struct crypto_async_request *areq = arg1;
struct otx2_cpt_req_info *cpt_req;
struct pci_dev *pdev;
if (inst_info) {
cpt_req = inst_info->req;
if (!status) {
/*
* When selected cipher is NULL we need to manually
* verify whether calculated hmac value matches
* received hmac value
*/
if (cpt_req->req_type ==
OTX2_CPT_AEAD_ENC_DEC_NULL_REQ &&
!cpt_req->is_enc)
status = validate_hmac_cipher_null(cpt_req);
}
pdev = inst_info->pdev;
otx2_cpt_info_destroy(pdev, inst_info);
}
if (areq)
areq->complete(areq, status);
}
static void output_iv_copyback(struct crypto_async_request *areq)
{
struct otx2_cpt_req_info *req_info;
struct otx2_cpt_req_ctx *rctx;
struct skcipher_request *sreq;
struct crypto_skcipher *stfm;
struct otx2_cpt_enc_ctx *ctx;
u32 start, ivsize;
sreq = container_of(areq, struct skcipher_request, base);
stfm = crypto_skcipher_reqtfm(sreq);
ctx = crypto_skcipher_ctx(stfm);
if (ctx->cipher_type == OTX2_CPT_AES_CBC ||
ctx->cipher_type == OTX2_CPT_DES3_CBC) {
rctx = skcipher_request_ctx(sreq);
req_info = &rctx->cpt_req;
ivsize = crypto_skcipher_ivsize(stfm);
start = sreq->cryptlen - ivsize;
if (req_info->is_enc) {
scatterwalk_map_and_copy(sreq->iv, sreq->dst, start,
ivsize, 0);
} else {
if (sreq->src != sreq->dst) {
scatterwalk_map_and_copy(sreq->iv, sreq->src,
start, ivsize, 0);
} else {
memcpy(sreq->iv, req_info->iv_out, ivsize);
kfree(req_info->iv_out);
}
}
}
}
static void otx2_cpt_skcipher_callback(int status, void *arg1, void *arg2)
{
struct otx2_cpt_inst_info *inst_info = arg2;
struct crypto_async_request *areq = arg1;
struct pci_dev *pdev;
if (areq) {
if (!status)
output_iv_copyback(areq);
if (inst_info) {
pdev = inst_info->pdev;
otx2_cpt_info_destroy(pdev, inst_info);
}
areq->complete(areq, status);
}
}
static inline void update_input_data(struct otx2_cpt_req_info *req_info,
struct scatterlist *inp_sg,
u32 nbytes, u32 *argcnt)
{
req_info->req.dlen += nbytes;
while (nbytes) {
u32 len = (nbytes < inp_sg->length) ? nbytes : inp_sg->length;
u8 *ptr = sg_virt(inp_sg);
req_info->in[*argcnt].vptr = (void *)ptr;
req_info->in[*argcnt].size = len;
nbytes -= len;
++(*argcnt);
inp_sg = sg_next(inp_sg);
}
}
static inline void update_output_data(struct otx2_cpt_req_info *req_info,
struct scatterlist *outp_sg,
u32 offset, u32 nbytes, u32 *argcnt)
{
u32 len, sg_len;
u8 *ptr;
req_info->rlen += nbytes;
while (nbytes) {
sg_len = outp_sg->length - offset;
len = (nbytes < sg_len) ? nbytes : sg_len;
ptr = sg_virt(outp_sg);
req_info->out[*argcnt].vptr = (void *) (ptr + offset);
req_info->out[*argcnt].size = len;
nbytes -= len;
++(*argcnt);
offset = 0;
outp_sg = sg_next(outp_sg);
}
}
static inline int create_ctx_hdr(struct skcipher_request *req, u32 enc,
u32 *argcnt)
{
struct crypto_skcipher *stfm = crypto_skcipher_reqtfm(req);
struct otx2_cpt_req_ctx *rctx = skcipher_request_ctx(req);
struct otx2_cpt_enc_ctx *ctx = crypto_skcipher_ctx(stfm);
struct otx2_cpt_req_info *req_info = &rctx->cpt_req;
struct otx2_cpt_fc_ctx *fctx = &rctx->fctx;
int ivsize = crypto_skcipher_ivsize(stfm);
u32 start = req->cryptlen - ivsize;
gfp_t flags;
flags = (req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP) ?
GFP_KERNEL : GFP_ATOMIC;
req_info->ctrl.s.dma_mode = OTX2_CPT_DMA_MODE_SG;
req_info->ctrl.s.se_req = 1;
req_info->req.opcode.s.major = OTX2_CPT_MAJOR_OP_FC |
DMA_MODE_FLAG(OTX2_CPT_DMA_MODE_SG);
if (enc) {
req_info->req.opcode.s.minor = 2;
} else {
req_info->req.opcode.s.minor = 3;
if ((ctx->cipher_type == OTX2_CPT_AES_CBC ||
ctx->cipher_type == OTX2_CPT_DES3_CBC) &&
req->src == req->dst) {
req_info->iv_out = kmalloc(ivsize, flags);
if (!req_info->iv_out)
return -ENOMEM;
scatterwalk_map_and_copy(req_info->iv_out, req->src,
start, ivsize, 0);
}
}
/* Encryption data length */
req_info->req.param1 = req->cryptlen;
/* Authentication data length */
req_info->req.param2 = 0;
fctx->enc.enc_ctrl.e.enc_cipher = ctx->cipher_type;
fctx->enc.enc_ctrl.e.aes_key = ctx->key_type;
fctx->enc.enc_ctrl.e.iv_source = OTX2_CPT_FROM_CPTR;
if (ctx->cipher_type == OTX2_CPT_AES_XTS)
memcpy(fctx->enc.encr_key, ctx->enc_key, ctx->key_len * 2);
else
memcpy(fctx->enc.encr_key, ctx->enc_key, ctx->key_len);
memcpy(fctx->enc.encr_iv, req->iv, crypto_skcipher_ivsize(stfm));
cpu_to_be64s(&fctx->enc.enc_ctrl.u);
/*
* Storing Packet Data Information in offset
* Control Word First 8 bytes
*/
req_info->in[*argcnt].vptr = (u8 *)&rctx->ctrl_word;
req_info->in[*argcnt].size = CONTROL_WORD_LEN;
req_info->req.dlen += CONTROL_WORD_LEN;
++(*argcnt);
req_info->in[*argcnt].vptr = (u8 *)fctx;
req_info->in[*argcnt].size = sizeof(struct otx2_cpt_fc_ctx);
req_info->req.dlen += sizeof(struct otx2_cpt_fc_ctx);
++(*argcnt);
return 0;
}
static inline int create_input_list(struct skcipher_request *req, u32 enc,
u32 enc_iv_len)
{
struct otx2_cpt_req_ctx *rctx = skcipher_request_ctx(req);
struct otx2_cpt_req_info *req_info = &rctx->cpt_req;
u32 argcnt = 0;
int ret;
ret = create_ctx_hdr(req, enc, &argcnt);
if (ret)
return ret;
update_input_data(req_info, req->src, req->cryptlen, &argcnt);
req_info->in_cnt = argcnt;
return 0;
}
static inline void create_output_list(struct skcipher_request *req,
u32 enc_iv_len)
{
struct otx2_cpt_req_ctx *rctx = skcipher_request_ctx(req);
struct otx2_cpt_req_info *req_info = &rctx->cpt_req;
u32 argcnt = 0;
/*
* OUTPUT Buffer Processing
* AES encryption/decryption output would be
* received in the following format
*
* ------IV--------|------ENCRYPTED/DECRYPTED DATA-----|
* [ 16 Bytes/ [ Request Enc/Dec/ DATA Len AES CBC ]
*/
update_output_data(req_info, req->dst, 0, req->cryptlen, &argcnt);
req_info->out_cnt = argcnt;
}
static int skcipher_do_fallback(struct skcipher_request *req, bool is_enc)
{
struct crypto_skcipher *stfm = crypto_skcipher_reqtfm(req);
struct otx2_cpt_req_ctx *rctx = skcipher_request_ctx(req);
struct otx2_cpt_enc_ctx *ctx = crypto_skcipher_ctx(stfm);
int ret;
if (ctx->fbk_cipher) {
skcipher_request_set_tfm(&rctx->sk_fbk_req, ctx->fbk_cipher);
skcipher_request_set_callback(&rctx->sk_fbk_req,
req->base.flags,
req->base.complete,
req->base.data);
skcipher_request_set_crypt(&rctx->sk_fbk_req, req->src,
req->dst, req->cryptlen, req->iv);
ret = is_enc ? crypto_skcipher_encrypt(&rctx->sk_fbk_req) :
crypto_skcipher_decrypt(&rctx->sk_fbk_req);
} else {
ret = -EINVAL;
}
return ret;
}
static inline int cpt_enc_dec(struct skcipher_request *req, u32 enc)
{
struct crypto_skcipher *stfm = crypto_skcipher_reqtfm(req);
struct otx2_cpt_req_ctx *rctx = skcipher_request_ctx(req);
struct otx2_cpt_enc_ctx *ctx = crypto_skcipher_ctx(stfm);
struct otx2_cpt_req_info *req_info = &rctx->cpt_req;
u32 enc_iv_len = crypto_skcipher_ivsize(stfm);
struct pci_dev *pdev;
int status, cpu_num;
if (req->cryptlen == 0)
return 0;
if (!IS_ALIGNED(req->cryptlen, ctx->enc_align_len))
return -EINVAL;
if (req->cryptlen > OTX2_CPT_MAX_REQ_SIZE)
return skcipher_do_fallback(req, enc);
/* Clear control words */
rctx->ctrl_word.flags = 0;
rctx->fctx.enc.enc_ctrl.u = 0;
status = create_input_list(req, enc, enc_iv_len);
if (status)
return status;
create_output_list(req, enc_iv_len);
status = get_se_device(&pdev, &cpu_num);
if (status)
return status;
req_info->callback = otx2_cpt_skcipher_callback;
req_info->areq = &req->base;
req_info->req_type = OTX2_CPT_ENC_DEC_REQ;
req_info->is_enc = enc;
req_info->is_trunc_hmac = false;
req_info->ctrl.s.grp = otx2_cpt_get_kcrypto_eng_grp_num(pdev);
/*
* We perform an asynchronous send and once
* the request is completed the driver would
* intimate through registered call back functions
*/
status = otx2_cpt_do_request(pdev, req_info, cpu_num);
return status;
}
static int otx2_cpt_skcipher_encrypt(struct skcipher_request *req)
{
return cpt_enc_dec(req, true);
}
static int otx2_cpt_skcipher_decrypt(struct skcipher_request *req)
{
return cpt_enc_dec(req, false);
}
static int otx2_cpt_skcipher_xts_setkey(struct crypto_skcipher *tfm,
const u8 *key, u32 keylen)
{
struct otx2_cpt_enc_ctx *ctx = crypto_skcipher_ctx(tfm);
const u8 *key2 = key + (keylen / 2);
const u8 *key1 = key;
int ret;
ret = xts_check_key(crypto_skcipher_tfm(tfm), key, keylen);
if (ret)
return ret;
ctx->key_len = keylen;
ctx->enc_align_len = 1;
memcpy(ctx->enc_key, key1, keylen / 2);
memcpy(ctx->enc_key + KEY2_OFFSET, key2, keylen / 2);
ctx->cipher_type = OTX2_CPT_AES_XTS;
switch (ctx->key_len) {
case 2 * AES_KEYSIZE_128:
ctx->key_type = OTX2_CPT_AES_128_BIT;
break;
case 2 * AES_KEYSIZE_192:
ctx->key_type = OTX2_CPT_AES_192_BIT;
break;
case 2 * AES_KEYSIZE_256:
ctx->key_type = OTX2_CPT_AES_256_BIT;
break;
default:
return -EINVAL;
}
return crypto_skcipher_setkey(ctx->fbk_cipher, key, keylen);
}
static int cpt_des_setkey(struct crypto_skcipher *tfm, const u8 *key,
u32 keylen, u8 cipher_type)
{
struct otx2_cpt_enc_ctx *ctx = crypto_skcipher_ctx(tfm);
if (keylen != DES3_EDE_KEY_SIZE)
return -EINVAL;
ctx->key_len = keylen;
ctx->cipher_type = cipher_type;
ctx->enc_align_len = 8;
memcpy(ctx->enc_key, key, keylen);
return crypto_skcipher_setkey(ctx->fbk_cipher, key, keylen);
}
static int cpt_aes_setkey(struct crypto_skcipher *tfm, const u8 *key,
u32 keylen, u8 cipher_type)
{
struct otx2_cpt_enc_ctx *ctx = crypto_skcipher_ctx(tfm);
switch (keylen) {
case AES_KEYSIZE_128:
ctx->key_type = OTX2_CPT_AES_128_BIT;
break;
case AES_KEYSIZE_192:
ctx->key_type = OTX2_CPT_AES_192_BIT;
break;
case AES_KEYSIZE_256:
ctx->key_type = OTX2_CPT_AES_256_BIT;
break;
default:
return -EINVAL;
}
if (cipher_type == OTX2_CPT_AES_CBC || cipher_type == OTX2_CPT_AES_ECB)
ctx->enc_align_len = 16;
else
ctx->enc_align_len = 1;
ctx->key_len = keylen;
ctx->cipher_type = cipher_type;
memcpy(ctx->enc_key, key, keylen);
return crypto_skcipher_setkey(ctx->fbk_cipher, key, keylen);
}
static int otx2_cpt_skcipher_cbc_aes_setkey(struct crypto_skcipher *tfm,
const u8 *key, u32 keylen)
{
return cpt_aes_setkey(tfm, key, keylen, OTX2_CPT_AES_CBC);
}
static int otx2_cpt_skcipher_ecb_aes_setkey(struct crypto_skcipher *tfm,
const u8 *key, u32 keylen)
{
return cpt_aes_setkey(tfm, key, keylen, OTX2_CPT_AES_ECB);
}
static int otx2_cpt_skcipher_cbc_des3_setkey(struct crypto_skcipher *tfm,
const u8 *key, u32 keylen)
{
return cpt_des_setkey(tfm, key, keylen, OTX2_CPT_DES3_CBC);
}
static int otx2_cpt_skcipher_ecb_des3_setkey(struct crypto_skcipher *tfm,
const u8 *key, u32 keylen)
{
return cpt_des_setkey(tfm, key, keylen, OTX2_CPT_DES3_ECB);
}
static int cpt_skcipher_fallback_init(struct otx2_cpt_enc_ctx *ctx,
struct crypto_alg *alg)
{
if (alg->cra_flags & CRYPTO_ALG_NEED_FALLBACK) {
ctx->fbk_cipher =
crypto_alloc_skcipher(alg->cra_name, 0,
CRYPTO_ALG_ASYNC |
CRYPTO_ALG_NEED_FALLBACK);
if (IS_ERR(ctx->fbk_cipher)) {
pr_err("%s() failed to allocate fallback for %s\n",
__func__, alg->cra_name);
return PTR_ERR(ctx->fbk_cipher);
}
}
return 0;
}
static int otx2_cpt_enc_dec_init(struct crypto_skcipher *stfm)
{
struct otx2_cpt_enc_ctx *ctx = crypto_skcipher_ctx(stfm);
struct crypto_tfm *tfm = crypto_skcipher_tfm(stfm);
struct crypto_alg *alg = tfm->__crt_alg;
memset(ctx, 0, sizeof(*ctx));
/*
* Additional memory for skcipher_request is
* allocated since the cryptd daemon uses
* this memory for request_ctx information
*/
crypto_skcipher_set_reqsize(stfm, sizeof(struct otx2_cpt_req_ctx) +
sizeof(struct skcipher_request));
return cpt_skcipher_fallback_init(ctx, alg);
}
static void otx2_cpt_skcipher_exit(struct crypto_skcipher *tfm)
{
struct otx2_cpt_enc_ctx *ctx = crypto_skcipher_ctx(tfm);
if (ctx->fbk_cipher) {
crypto_free_skcipher(ctx->fbk_cipher);
ctx->fbk_cipher = NULL;
}
}
static int cpt_aead_fallback_init(struct otx2_cpt_aead_ctx *ctx,
struct crypto_alg *alg)
{
if (alg->cra_flags & CRYPTO_ALG_NEED_FALLBACK) {
ctx->fbk_cipher =
crypto_alloc_aead(alg->cra_name, 0,
CRYPTO_ALG_ASYNC |
CRYPTO_ALG_NEED_FALLBACK);
if (IS_ERR(ctx->fbk_cipher)) {
pr_err("%s() failed to allocate fallback for %s\n",
__func__, alg->cra_name);
return PTR_ERR(ctx->fbk_cipher);
}
}
return 0;
}
static int cpt_aead_init(struct crypto_aead *atfm, u8 cipher_type, u8 mac_type)
{
struct otx2_cpt_aead_ctx *ctx = crypto_aead_ctx(atfm);
struct crypto_tfm *tfm = crypto_aead_tfm(atfm);
struct crypto_alg *alg = tfm->__crt_alg;
ctx->cipher_type = cipher_type;
ctx->mac_type = mac_type;
/*
* When selected cipher is NULL we use HMAC opcode instead of
* FLEXICRYPTO opcode therefore we don't need to use HASH algorithms
* for calculating ipad and opad
*/
if (ctx->cipher_type != OTX2_CPT_CIPHER_NULL) {
switch (ctx->mac_type) {
case OTX2_CPT_SHA1:
ctx->hashalg = crypto_alloc_shash("sha1", 0,
CRYPTO_ALG_ASYNC);
if (IS_ERR(ctx->hashalg))
return PTR_ERR(ctx->hashalg);
break;
case OTX2_CPT_SHA256:
ctx->hashalg = crypto_alloc_shash("sha256", 0,
CRYPTO_ALG_ASYNC);
if (IS_ERR(ctx->hashalg))
return PTR_ERR(ctx->hashalg);
break;
case OTX2_CPT_SHA384:
ctx->hashalg = crypto_alloc_shash("sha384", 0,
CRYPTO_ALG_ASYNC);
if (IS_ERR(ctx->hashalg))
return PTR_ERR(ctx->hashalg);
break;
case OTX2_CPT_SHA512:
ctx->hashalg = crypto_alloc_shash("sha512", 0,
CRYPTO_ALG_ASYNC);
if (IS_ERR(ctx->hashalg))
return PTR_ERR(ctx->hashalg);
break;
}
}
switch (ctx->cipher_type) {
case OTX2_CPT_AES_CBC:
case OTX2_CPT_AES_ECB:
ctx->enc_align_len = 16;
break;
case OTX2_CPT_DES3_CBC:
case OTX2_CPT_DES3_ECB:
ctx->enc_align_len = 8;
break;
case OTX2_CPT_AES_GCM:
case OTX2_CPT_CIPHER_NULL:
ctx->enc_align_len = 1;
break;
}
crypto_aead_set_reqsize(atfm, sizeof(struct otx2_cpt_req_ctx));
return cpt_aead_fallback_init(ctx, alg);
}
static int otx2_cpt_aead_cbc_aes_sha1_init(struct crypto_aead *tfm)
{
return cpt_aead_init(tfm, OTX2_CPT_AES_CBC, OTX2_CPT_SHA1);
}
static int otx2_cpt_aead_cbc_aes_sha256_init(struct crypto_aead *tfm)
{
return cpt_aead_init(tfm, OTX2_CPT_AES_CBC, OTX2_CPT_SHA256);
}
static int otx2_cpt_aead_cbc_aes_sha384_init(struct crypto_aead *tfm)
{
return cpt_aead_init(tfm, OTX2_CPT_AES_CBC, OTX2_CPT_SHA384);
}
static int otx2_cpt_aead_cbc_aes_sha512_init(struct crypto_aead *tfm)
{
return cpt_aead_init(tfm, OTX2_CPT_AES_CBC, OTX2_CPT_SHA512);
}
static int otx2_cpt_aead_ecb_null_sha1_init(struct crypto_aead *tfm)
{
return cpt_aead_init(tfm, OTX2_CPT_CIPHER_NULL, OTX2_CPT_SHA1);
}
static int otx2_cpt_aead_ecb_null_sha256_init(struct crypto_aead *tfm)
{
return cpt_aead_init(tfm, OTX2_CPT_CIPHER_NULL, OTX2_CPT_SHA256);
}
static int otx2_cpt_aead_ecb_null_sha384_init(struct crypto_aead *tfm)
{
return cpt_aead_init(tfm, OTX2_CPT_CIPHER_NULL, OTX2_CPT_SHA384);
}
static int otx2_cpt_aead_ecb_null_sha512_init(struct crypto_aead *tfm)
{
return cpt_aead_init(tfm, OTX2_CPT_CIPHER_NULL, OTX2_CPT_SHA512);
}
static int otx2_cpt_aead_gcm_aes_init(struct crypto_aead *tfm)
{
return cpt_aead_init(tfm, OTX2_CPT_AES_GCM, OTX2_CPT_MAC_NULL);
}
static void otx2_cpt_aead_exit(struct crypto_aead *tfm)
{
struct otx2_cpt_aead_ctx *ctx = crypto_aead_ctx(tfm);
kfree(ctx->ipad);
kfree(ctx->opad);
if (ctx->hashalg)
crypto_free_shash(ctx->hashalg);
kfree(ctx->sdesc);
if (ctx->fbk_cipher) {
crypto_free_aead(ctx->fbk_cipher);
ctx->fbk_cipher = NULL;
}
}
static int otx2_cpt_aead_gcm_set_authsize(struct crypto_aead *tfm,
unsigned int authsize)
{
struct otx2_cpt_aead_ctx *ctx = crypto_aead_ctx(tfm);
if (crypto_rfc4106_check_authsize(authsize))
return -EINVAL;
tfm->authsize = authsize;
/* Set authsize for fallback case */
if (ctx->fbk_cipher)
ctx->fbk_cipher->authsize = authsize;
return 0;
}
static int otx2_cpt_aead_set_authsize(struct crypto_aead *tfm,
unsigned int authsize)
{
tfm->authsize = authsize;
return 0;
}
static int otx2_cpt_aead_null_set_authsize(struct crypto_aead *tfm,
unsigned int authsize)
{
struct otx2_cpt_aead_ctx *ctx = crypto_aead_ctx(tfm);
ctx->is_trunc_hmac = true;
tfm->authsize = authsize;
return 0;
}
static struct otx2_cpt_sdesc *alloc_sdesc(struct crypto_shash *alg)
{
struct otx2_cpt_sdesc *sdesc;
int size;
size = sizeof(struct shash_desc) + crypto_shash_descsize(alg);
sdesc = kmalloc(size, GFP_KERNEL);
if (!sdesc)
return NULL;
sdesc->shash.tfm = alg;
return sdesc;
}
static inline void swap_data32(void *buf, u32 len)
{
cpu_to_be32_array(buf, buf, len / 4);
}
static inline void swap_data64(void *buf, u32 len)
{
u64 *src = buf;
int i = 0;
for (i = 0 ; i < len / 8; i++, src++)
cpu_to_be64s(src);
}
static int copy_pad(u8 mac_type, u8 *out_pad, u8 *in_pad)
{
struct sha512_state *sha512;
struct sha256_state *sha256;
struct sha1_state *sha1;
switch (mac_type) {
case OTX2_CPT_SHA1:
sha1 = (struct sha1_state *) in_pad;
swap_data32(sha1->state, SHA1_DIGEST_SIZE);
memcpy(out_pad, &sha1->state, SHA1_DIGEST_SIZE);
break;
case OTX2_CPT_SHA256:
sha256 = (struct sha256_state *) in_pad;
swap_data32(sha256->state, SHA256_DIGEST_SIZE);
memcpy(out_pad, &sha256->state, SHA256_DIGEST_SIZE);
break;
case OTX2_CPT_SHA384:
case OTX2_CPT_SHA512:
sha512 = (struct sha512_state *) in_pad;
swap_data64(sha512->state, SHA512_DIGEST_SIZE);
memcpy(out_pad, &sha512->state, SHA512_DIGEST_SIZE);
break;
default:
return -EINVAL;
}
return 0;
}
static int aead_hmac_init(struct crypto_aead *cipher)
{
struct otx2_cpt_aead_ctx *ctx = crypto_aead_ctx(cipher);
int state_size = crypto_shash_statesize(ctx->hashalg);
int ds = crypto_shash_digestsize(ctx->hashalg);
int bs = crypto_shash_blocksize(ctx->hashalg);
int authkeylen = ctx->auth_key_len;
u8 *ipad = NULL, *opad = NULL;
int ret = 0, icount = 0;
ctx->sdesc = alloc_sdesc(ctx->hashalg);
if (!ctx->sdesc)
return -ENOMEM;
ctx->ipad = kzalloc(bs, GFP_KERNEL);
if (!ctx->ipad) {
ret = -ENOMEM;
goto calc_fail;
}
ctx->opad = kzalloc(bs, GFP_KERNEL);
if (!ctx->opad) {
ret = -ENOMEM;
goto calc_fail;
}
ipad = kzalloc(state_size, GFP_KERNEL);
if (!ipad) {
ret = -ENOMEM;
goto calc_fail;
}
opad = kzalloc(state_size, GFP_KERNEL);
if (!opad) {
ret = -ENOMEM;
goto calc_fail;
}
if (authkeylen > bs) {
ret = crypto_shash_digest(&ctx->sdesc->shash, ctx->key,
authkeylen, ipad);
if (ret)
goto calc_fail;
authkeylen = ds;
} else {
memcpy(ipad, ctx->key, authkeylen);
}
memset(ipad + authkeylen, 0, bs - authkeylen);
memcpy(opad, ipad, bs);
for (icount = 0; icount < bs; icount++) {
ipad[icount] ^= 0x36;
opad[icount] ^= 0x5c;
}
/*
* Partial Hash calculated from the software
* algorithm is retrieved for IPAD & OPAD
*/
/* IPAD Calculation */
crypto_shash_init(&ctx->sdesc->shash);
crypto_shash_update(&ctx->sdesc->shash, ipad, bs);
crypto_shash_export(&ctx->sdesc->shash, ipad);
ret = copy_pad(ctx->mac_type, ctx->ipad, ipad);
if (ret)
goto calc_fail;
/* OPAD Calculation */
crypto_shash_init(&ctx->sdesc->shash);
crypto_shash_update(&ctx->sdesc->shash, opad, bs);
crypto_shash_export(&ctx->sdesc->shash, opad);
ret = copy_pad(ctx->mac_type, ctx->opad, opad);
if (ret)
goto calc_fail;
kfree(ipad);
kfree(opad);
return 0;
calc_fail:
kfree(ctx->ipad);
ctx->ipad = NULL;
kfree(ctx->opad);
ctx->opad = NULL;
kfree(ipad);
kfree(opad);
kfree(ctx->sdesc);
ctx->sdesc = NULL;
return ret;
}
static int otx2_cpt_aead_cbc_aes_sha_setkey(struct crypto_aead *cipher,
const unsigned char *key,
unsigned int keylen)
{
struct otx2_cpt_aead_ctx *ctx = crypto_aead_ctx(cipher);
struct crypto_authenc_key_param *param;
int enckeylen = 0, authkeylen = 0;
struct rtattr *rta = (void *)key;
int status;
if (!RTA_OK(rta, keylen))
return -EINVAL;
if (rta->rta_type != CRYPTO_AUTHENC_KEYA_PARAM)
return -EINVAL;
if (RTA_PAYLOAD(rta) < sizeof(*param))
return -EINVAL;
param = RTA_DATA(rta);
enckeylen = be32_to_cpu(param->enckeylen);
key += RTA_ALIGN(rta->rta_len);
keylen -= RTA_ALIGN(rta->rta_len);
if (keylen < enckeylen)
return -EINVAL;
if (keylen > OTX2_CPT_MAX_KEY_SIZE)
return -EINVAL;
authkeylen = keylen - enckeylen;
memcpy(ctx->key, key, keylen);
switch (enckeylen) {
case AES_KEYSIZE_128:
ctx->key_type = OTX2_CPT_AES_128_BIT;
break;
case AES_KEYSIZE_192:
ctx->key_type = OTX2_CPT_AES_192_BIT;
break;
case AES_KEYSIZE_256:
ctx->key_type = OTX2_CPT_AES_256_BIT;
break;
default:
/* Invalid key length */
return -EINVAL;
}
ctx->enc_key_len = enckeylen;
ctx->auth_key_len = authkeylen;
status = aead_hmac_init(cipher);
if (status)
return status;
return 0;
}
static int otx2_cpt_aead_ecb_null_sha_setkey(struct crypto_aead *cipher,
const unsigned char *key,
unsigned int keylen)
{
struct otx2_cpt_aead_ctx *ctx = crypto_aead_ctx(cipher);
struct crypto_authenc_key_param *param;
struct rtattr *rta = (void *)key;
int enckeylen = 0;
if (!RTA_OK(rta, keylen))
return -EINVAL;
if (rta->rta_type != CRYPTO_AUTHENC_KEYA_PARAM)
return -EINVAL;
if (RTA_PAYLOAD(rta) < sizeof(*param))
return -EINVAL;
param = RTA_DATA(rta);
enckeylen = be32_to_cpu(param->enckeylen);
key += RTA_ALIGN(rta->rta_len);
keylen -= RTA_ALIGN(rta->rta_len);
if (enckeylen != 0)
return -EINVAL;
if (keylen > OTX2_CPT_MAX_KEY_SIZE)
return -EINVAL;
memcpy(ctx->key, key, keylen);
ctx->enc_key_len = enckeylen;
ctx->auth_key_len = keylen;
return 0;
}
static int otx2_cpt_aead_gcm_aes_setkey(struct crypto_aead *cipher,
const unsigned char *key,
unsigned int keylen)
{
struct otx2_cpt_aead_ctx *ctx = crypto_aead_ctx(cipher);
/*
* For aes gcm we expect to get encryption key (16, 24, 32 bytes)
* and salt (4 bytes)
*/
switch (keylen) {
case AES_KEYSIZE_128 + AES_GCM_SALT_SIZE:
ctx->key_type = OTX2_CPT_AES_128_BIT;
ctx->enc_key_len = AES_KEYSIZE_128;
break;
case AES_KEYSIZE_192 + AES_GCM_SALT_SIZE:
ctx->key_type = OTX2_CPT_AES_192_BIT;
ctx->enc_key_len = AES_KEYSIZE_192;