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6#include <linux/kernel.h>
7#include <linux/string.h>
8
9#include "util.h"
10#include "spu.h"
11#include "spum.h"
12#include "cipher.h"
13
14char *hash_alg_name[] = { "None", "md5", "sha1", "sha224", "sha256", "aes",
15 "sha384", "sha512", "sha3_224", "sha3_256", "sha3_384", "sha3_512" };
16
17char *aead_alg_name[] = { "ccm(aes)", "gcm(aes)", "authenc" };
18
19
20void spum_dump_msg_hdr(u8 *buf, unsigned int buf_len)
21{
22 u8 *ptr = buf;
23 struct SPUHEADER *spuh = (struct SPUHEADER *)buf;
24 unsigned int hash_key_len = 0;
25 unsigned int hash_state_len = 0;
26 unsigned int cipher_key_len = 0;
27 unsigned int iv_len;
28 u32 pflags;
29 u32 cflags;
30 u32 ecf;
31 u32 cipher_alg;
32 u32 cipher_mode;
33 u32 cipher_type;
34 u32 hash_alg;
35 u32 hash_mode;
36 u32 hash_type;
37 u32 sctx_size;
38 u32 sctx_pl_len;
39
40 packet_log("\n");
41 packet_log("SPU Message header %p len: %u\n", buf, buf_len);
42
43
44 packet_log(" MH 0x%08x\n", be32_to_cpup((__be32 *)ptr));
45 if (spuh->mh.flags & MH_SCTX_PRES)
46 packet_log(" SCTX present\n");
47 if (spuh->mh.flags & MH_BDESC_PRES)
48 packet_log(" BDESC present\n");
49 if (spuh->mh.flags & MH_MFM_PRES)
50 packet_log(" MFM present\n");
51 if (spuh->mh.flags & MH_BD_PRES)
52 packet_log(" BD present\n");
53 if (spuh->mh.flags & MH_HASH_PRES)
54 packet_log(" HASH present\n");
55 if (spuh->mh.flags & MH_SUPDT_PRES)
56 packet_log(" SUPDT present\n");
57 packet_log(" Opcode 0x%02x\n", spuh->mh.op_code);
58
59 ptr += sizeof(spuh->mh) + sizeof(spuh->emh);
60
61
62 if (spuh->mh.flags & MH_SCTX_PRES) {
63 pflags = be32_to_cpu(spuh->sa.proto_flags);
64 packet_log(" SCTX[0] 0x%08x\n", pflags);
65 sctx_size = pflags & SCTX_SIZE;
66 packet_log(" Size %u words\n", sctx_size);
67
68 cflags = be32_to_cpu(spuh->sa.cipher_flags);
69 packet_log(" SCTX[1] 0x%08x\n", cflags);
70 packet_log(" Inbound:%lu (1:decrypt/vrfy 0:encrypt/auth)\n",
71 (cflags & CIPHER_INBOUND) >> CIPHER_INBOUND_SHIFT);
72 packet_log(" Order:%lu (1:AuthFirst 0:EncFirst)\n",
73 (cflags & CIPHER_ORDER) >> CIPHER_ORDER_SHIFT);
74 packet_log(" ICV_IS_512:%lx\n",
75 (cflags & ICV_IS_512) >> ICV_IS_512_SHIFT);
76 cipher_alg = (cflags & CIPHER_ALG) >> CIPHER_ALG_SHIFT;
77 cipher_mode = (cflags & CIPHER_MODE) >> CIPHER_MODE_SHIFT;
78 cipher_type = (cflags & CIPHER_TYPE) >> CIPHER_TYPE_SHIFT;
79 packet_log(" Crypto Alg:%u Mode:%u Type:%u\n",
80 cipher_alg, cipher_mode, cipher_type);
81 hash_alg = (cflags & HASH_ALG) >> HASH_ALG_SHIFT;
82 hash_mode = (cflags & HASH_MODE) >> HASH_MODE_SHIFT;
83 hash_type = (cflags & HASH_TYPE) >> HASH_TYPE_SHIFT;
84 packet_log(" Hash Alg:%x Mode:%x Type:%x\n",
85 hash_alg, hash_mode, hash_type);
86 packet_log(" UPDT_Offset:%u\n", cflags & UPDT_OFST);
87
88 ecf = be32_to_cpu(spuh->sa.ecf);
89 packet_log(" SCTX[2] 0x%08x\n", ecf);
90 packet_log(" WriteICV:%lu CheckICV:%lu ICV_SIZE:%u ",
91 (ecf & INSERT_ICV) >> INSERT_ICV_SHIFT,
92 (ecf & CHECK_ICV) >> CHECK_ICV_SHIFT,
93 (ecf & ICV_SIZE) >> ICV_SIZE_SHIFT);
94 packet_log("BD_SUPPRESS:%lu\n",
95 (ecf & BD_SUPPRESS) >> BD_SUPPRESS_SHIFT);
96 packet_log(" SCTX_IV:%lu ExplicitIV:%lu GenIV:%lu ",
97 (ecf & SCTX_IV) >> SCTX_IV_SHIFT,
98 (ecf & EXPLICIT_IV) >> EXPLICIT_IV_SHIFT,
99 (ecf & GEN_IV) >> GEN_IV_SHIFT);
100 packet_log("IV_OV_OFST:%lu EXP_IV_SIZE:%u\n",
101 (ecf & IV_OFFSET) >> IV_OFFSET_SHIFT,
102 ecf & EXP_IV_SIZE);
103
104 ptr += sizeof(struct SCTX);
105
106 if (hash_alg && hash_mode) {
107 char *name = "NONE";
108
109 switch (hash_alg) {
110 case HASH_ALG_MD5:
111 hash_key_len = 16;
112 name = "MD5";
113 break;
114 case HASH_ALG_SHA1:
115 hash_key_len = 20;
116 name = "SHA1";
117 break;
118 case HASH_ALG_SHA224:
119 hash_key_len = 28;
120 name = "SHA224";
121 break;
122 case HASH_ALG_SHA256:
123 hash_key_len = 32;
124 name = "SHA256";
125 break;
126 case HASH_ALG_SHA384:
127 hash_key_len = 48;
128 name = "SHA384";
129 break;
130 case HASH_ALG_SHA512:
131 hash_key_len = 64;
132 name = "SHA512";
133 break;
134 case HASH_ALG_AES:
135 hash_key_len = 0;
136 name = "AES";
137 break;
138 case HASH_ALG_NONE:
139 break;
140 }
141
142 packet_log(" Auth Key Type:%s Length:%u Bytes\n",
143 name, hash_key_len);
144 packet_dump(" KEY: ", ptr, hash_key_len);
145 ptr += hash_key_len;
146 } else if ((hash_alg == HASH_ALG_AES) &&
147 (hash_mode == HASH_MODE_XCBC)) {
148 char *name = "NONE";
149
150 switch (cipher_type) {
151 case CIPHER_TYPE_AES128:
152 hash_key_len = 16;
153 name = "AES128-XCBC";
154 break;
155 case CIPHER_TYPE_AES192:
156 hash_key_len = 24;
157 name = "AES192-XCBC";
158 break;
159 case CIPHER_TYPE_AES256:
160 hash_key_len = 32;
161 name = "AES256-XCBC";
162 break;
163 }
164 packet_log(" Auth Key Type:%s Length:%u Bytes\n",
165 name, hash_key_len);
166 packet_dump(" KEY: ", ptr, hash_key_len);
167 ptr += hash_key_len;
168 }
169
170 if (hash_alg && (hash_mode == HASH_MODE_NONE) &&
171 (hash_type == HASH_TYPE_UPDT)) {
172 char *name = "NONE";
173
174 switch (hash_alg) {
175 case HASH_ALG_MD5:
176 hash_state_len = 16;
177 name = "MD5";
178 break;
179 case HASH_ALG_SHA1:
180 hash_state_len = 20;
181 name = "SHA1";
182 break;
183 case HASH_ALG_SHA224:
184 hash_state_len = 32;
185 name = "SHA224";
186 break;
187 case HASH_ALG_SHA256:
188 hash_state_len = 32;
189 name = "SHA256";
190 break;
191 case HASH_ALG_SHA384:
192 hash_state_len = 48;
193 name = "SHA384";
194 break;
195 case HASH_ALG_SHA512:
196 hash_state_len = 64;
197 name = "SHA512";
198 break;
199 case HASH_ALG_AES:
200 hash_state_len = 0;
201 name = "AES";
202 break;
203 case HASH_ALG_NONE:
204 break;
205 }
206
207 packet_log(" Auth State Type:%s Length:%u Bytes\n",
208 name, hash_state_len);
209 packet_dump(" State: ", ptr, hash_state_len);
210 ptr += hash_state_len;
211 }
212
213 if (cipher_alg) {
214 char *name = "NONE";
215
216 switch (cipher_alg) {
217 case CIPHER_ALG_DES:
218 cipher_key_len = 8;
219 name = "DES";
220 break;
221 case CIPHER_ALG_3DES:
222 cipher_key_len = 24;
223 name = "3DES";
224 break;
225 case CIPHER_ALG_AES:
226 switch (cipher_type) {
227 case CIPHER_TYPE_AES128:
228 cipher_key_len = 16;
229 name = "AES128";
230 break;
231 case CIPHER_TYPE_AES192:
232 cipher_key_len = 24;
233 name = "AES192";
234 break;
235 case CIPHER_TYPE_AES256:
236 cipher_key_len = 32;
237 name = "AES256";
238 break;
239 }
240 break;
241 case CIPHER_ALG_NONE:
242 break;
243 }
244
245 packet_log(" Cipher Key Type:%s Length:%u Bytes\n",
246 name, cipher_key_len);
247
248
249 if (cipher_mode == CIPHER_MODE_XTS) {
250 packet_dump(" KEY2: ", ptr, cipher_key_len);
251 ptr += cipher_key_len;
252 packet_dump(" KEY1: ", ptr, cipher_key_len);
253 ptr += cipher_key_len;
254
255 cipher_key_len *= 2;
256 } else {
257 packet_dump(" KEY: ", ptr, cipher_key_len);
258 ptr += cipher_key_len;
259 }
260
261 if (ecf & SCTX_IV) {
262 sctx_pl_len = sctx_size * sizeof(u32) -
263 sizeof(struct SCTX);
264 iv_len = sctx_pl_len -
265 (hash_key_len + hash_state_len +
266 cipher_key_len);
267 packet_log(" IV Length:%u Bytes\n", iv_len);
268 packet_dump(" IV: ", ptr, iv_len);
269 ptr += iv_len;
270 }
271 }
272 }
273
274
275 if (spuh->mh.flags & MH_BDESC_PRES) {
276 struct BDESC_HEADER *bdesc = (struct BDESC_HEADER *)ptr;
277
278 packet_log(" BDESC[0] 0x%08x\n", be32_to_cpup((__be32 *)ptr));
279 packet_log(" OffsetMAC:%u LengthMAC:%u\n",
280 be16_to_cpu(bdesc->offset_mac),
281 be16_to_cpu(bdesc->length_mac));
282 ptr += sizeof(u32);
283
284 packet_log(" BDESC[1] 0x%08x\n", be32_to_cpup((__be32 *)ptr));
285 packet_log(" OffsetCrypto:%u LengthCrypto:%u\n",
286 be16_to_cpu(bdesc->offset_crypto),
287 be16_to_cpu(bdesc->length_crypto));
288 ptr += sizeof(u32);
289
290 packet_log(" BDESC[2] 0x%08x\n", be32_to_cpup((__be32 *)ptr));
291 packet_log(" OffsetICV:%u OffsetIV:%u\n",
292 be16_to_cpu(bdesc->offset_icv),
293 be16_to_cpu(bdesc->offset_iv));
294 ptr += sizeof(u32);
295 }
296
297
298 if (spuh->mh.flags & MH_BD_PRES) {
299 struct BD_HEADER *bd = (struct BD_HEADER *)ptr;
300
301 packet_log(" BD[0] 0x%08x\n", be32_to_cpup((__be32 *)ptr));
302 packet_log(" Size:%ubytes PrevLength:%u\n",
303 be16_to_cpu(bd->size), be16_to_cpu(bd->prev_length));
304 ptr += 4;
305 }
306
307
308 if (buf + buf_len != ptr) {
309 packet_log(" Packet parsed incorrectly. ");
310 packet_log("buf:%p buf_len:%u buf+buf_len:%p ptr:%p\n",
311 buf, buf_len, buf + buf_len, ptr);
312 }
313
314 packet_log("\n");
315}
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329
330u32 spum_ns2_ctx_max_payload(enum spu_cipher_alg cipher_alg,
331 enum spu_cipher_mode cipher_mode,
332 unsigned int blocksize)
333{
334 u32 max_payload = SPUM_NS2_MAX_PAYLOAD;
335 u32 excess;
336
337
338 if (cipher_mode == CIPHER_MODE_XTS)
339 max_payload -= SPU_XTS_TWEAK_SIZE;
340
341 excess = max_payload % blocksize;
342
343 return max_payload - excess;
344}
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359u32 spum_nsp_ctx_max_payload(enum spu_cipher_alg cipher_alg,
360 enum spu_cipher_mode cipher_mode,
361 unsigned int blocksize)
362{
363 u32 max_payload = SPUM_NSP_MAX_PAYLOAD;
364 u32 excess;
365
366
367 if (cipher_mode == CIPHER_MODE_XTS)
368 max_payload -= SPU_XTS_TWEAK_SIZE;
369
370 excess = max_payload % blocksize;
371
372 return max_payload - excess;
373}
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382
383u32 spum_payload_length(u8 *spu_hdr)
384{
385 struct BD_HEADER *bd;
386 u32 pl_len;
387
388
389 bd = (struct BD_HEADER *)(spu_hdr + 8);
390 pl_len = be16_to_cpu(bd->size);
391
392 return pl_len;
393}
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404u16 spum_response_hdr_len(u16 auth_key_len, u16 enc_key_len, bool is_hash)
405{
406 if (is_hash)
407 return SPU_HASH_RESP_HDR_LEN;
408 else
409 return SPU_RESP_HDR_LEN;
410}
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424u16 spum_hash_pad_len(enum hash_alg hash_alg, enum hash_mode hash_mode,
425 u32 chunksize, u16 hash_block_size)
426{
427 unsigned int length_len;
428 unsigned int used_space_last_block;
429 int hash_pad_len;
430
431
432 if ((hash_alg == HASH_ALG_AES) && (hash_mode == HASH_MODE_XCBC)) {
433 used_space_last_block = chunksize % hash_block_size;
434 hash_pad_len = hash_block_size - used_space_last_block;
435 if (hash_pad_len >= hash_block_size)
436 hash_pad_len -= hash_block_size;
437 return hash_pad_len;
438 }
439
440 used_space_last_block = chunksize % hash_block_size + 1;
441 if ((hash_alg == HASH_ALG_SHA384) || (hash_alg == HASH_ALG_SHA512))
442 length_len = 2 * sizeof(u64);
443 else
444 length_len = sizeof(u64);
445
446 used_space_last_block += length_len;
447 hash_pad_len = hash_block_size - used_space_last_block;
448 if (hash_pad_len < 0)
449 hash_pad_len += hash_block_size;
450
451 hash_pad_len += 1 + length_len;
452 return hash_pad_len;
453}
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462u32 spum_gcm_ccm_pad_len(enum spu_cipher_mode cipher_mode,
463 unsigned int data_size)
464{
465 u32 pad_len = 0;
466 u32 m1 = SPU_GCM_CCM_ALIGN - 1;
467
468 if ((cipher_mode == CIPHER_MODE_GCM) ||
469 (cipher_mode == CIPHER_MODE_CCM))
470 pad_len = ((data_size + m1) & ~m1) - data_size;
471
472 return pad_len;
473}
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485u32 spum_assoc_resp_len(enum spu_cipher_mode cipher_mode,
486 unsigned int assoc_len, unsigned int iv_len,
487 bool is_encrypt)
488{
489 u32 buflen = 0;
490 u32 pad;
491
492 if (assoc_len)
493 buflen = assoc_len;
494
495 if (cipher_mode == CIPHER_MODE_GCM) {
496
497 pad = spum_gcm_ccm_pad_len(cipher_mode, buflen);
498 buflen += pad;
499 }
500 if (cipher_mode == CIPHER_MODE_CCM) {
501
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505 pad = spum_gcm_ccm_pad_len(cipher_mode, buflen + 2);
506 buflen += pad;
507 }
508
509 return buflen;
510}
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523u8 spum_aead_ivlen(enum spu_cipher_mode cipher_mode, u16 iv_len)
524{
525 return 0;
526}
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538enum hash_type spum_hash_type(u32 src_sent)
539{
540 return src_sent ? HASH_TYPE_UPDT : HASH_TYPE_INIT;
541}
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554u32 spum_digest_size(u32 alg_digest_size, enum hash_alg alg,
555 enum hash_type htype)
556{
557 u32 digestsize = alg_digest_size;
558
559
560
561
562 if ((htype == HASH_TYPE_INIT) || (htype == HASH_TYPE_UPDT)) {
563 if (alg == HASH_ALG_SHA224)
564 digestsize = SHA256_DIGEST_SIZE;
565 else if (alg == HASH_ALG_SHA384)
566 digestsize = SHA512_DIGEST_SIZE;
567 }
568 return digestsize;
569}
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586u32 spum_create_request(u8 *spu_hdr,
587 struct spu_request_opts *req_opts,
588 struct spu_cipher_parms *cipher_parms,
589 struct spu_hash_parms *hash_parms,
590 struct spu_aead_parms *aead_parms,
591 unsigned int data_size)
592{
593 struct SPUHEADER *spuh;
594 struct BDESC_HEADER *bdesc;
595 struct BD_HEADER *bd;
596
597 u8 *ptr;
598 u32 protocol_bits = 0;
599 u32 cipher_bits = 0;
600 u32 ecf_bits = 0;
601 u8 sctx_words = 0;
602 unsigned int buf_len = 0;
603
604
605 unsigned int cipher_len = hash_parms->prebuf_len + data_size +
606 hash_parms->pad_len;
607
608
609 unsigned int cipher_offset = aead_parms->assoc_size +
610 aead_parms->iv_len + aead_parms->aad_pad_len;
611
612
613 unsigned int real_db_size = spu_real_db_size(aead_parms->assoc_size,
614 aead_parms->iv_len,
615 hash_parms->prebuf_len,
616 data_size,
617 aead_parms->aad_pad_len,
618 aead_parms->data_pad_len,
619 hash_parms->pad_len);
620
621 unsigned int auth_offset = 0;
622 unsigned int offset_iv = 0;
623
624
625 unsigned int auth_len;
626
627 auth_len = real_db_size;
628
629 if (req_opts->is_aead && req_opts->is_inbound)
630 cipher_len -= hash_parms->digestsize;
631
632 if (req_opts->is_aead && req_opts->is_inbound)
633 auth_len -= hash_parms->digestsize;
634
635 if ((hash_parms->alg == HASH_ALG_AES) &&
636 (hash_parms->mode == HASH_MODE_XCBC)) {
637 auth_len -= hash_parms->pad_len;
638 cipher_len -= hash_parms->pad_len;
639 }
640
641 flow_log("%s()\n", __func__);
642 flow_log(" in:%u authFirst:%u\n",
643 req_opts->is_inbound, req_opts->auth_first);
644 flow_log(" %s. cipher alg:%u mode:%u type %u\n",
645 spu_alg_name(cipher_parms->alg, cipher_parms->mode),
646 cipher_parms->alg, cipher_parms->mode, cipher_parms->type);
647 flow_log(" key: %d\n", cipher_parms->key_len);
648 flow_dump(" key: ", cipher_parms->key_buf, cipher_parms->key_len);
649 flow_log(" iv: %d\n", cipher_parms->iv_len);
650 flow_dump(" iv: ", cipher_parms->iv_buf, cipher_parms->iv_len);
651 flow_log(" auth alg:%u mode:%u type %u\n",
652 hash_parms->alg, hash_parms->mode, hash_parms->type);
653 flow_log(" digestsize: %u\n", hash_parms->digestsize);
654 flow_log(" authkey: %d\n", hash_parms->key_len);
655 flow_dump(" authkey: ", hash_parms->key_buf, hash_parms->key_len);
656 flow_log(" assoc_size:%u\n", aead_parms->assoc_size);
657 flow_log(" prebuf_len:%u\n", hash_parms->prebuf_len);
658 flow_log(" data_size:%u\n", data_size);
659 flow_log(" hash_pad_len:%u\n", hash_parms->pad_len);
660 flow_log(" real_db_size:%u\n", real_db_size);
661 flow_log(" auth_offset:%u auth_len:%u cipher_offset:%u cipher_len:%u\n",
662 auth_offset, auth_len, cipher_offset, cipher_len);
663 flow_log(" aead_iv: %u\n", aead_parms->iv_len);
664
665
666 ptr = spu_hdr;
667 memset(ptr, 0, sizeof(struct SPUHEADER));
668
669
670
671 spuh = (struct SPUHEADER *)ptr;
672 ptr += sizeof(struct SPUHEADER);
673 buf_len += sizeof(struct SPUHEADER);
674
675 spuh->mh.op_code = SPU_CRYPTO_OPERATION_GENERIC;
676 spuh->mh.flags |= (MH_SCTX_PRES | MH_BDESC_PRES | MH_BD_PRES);
677
678
679 sctx_words = 3;
680
681
682 if (req_opts->is_inbound)
683 cipher_bits |= CIPHER_INBOUND;
684 if (req_opts->auth_first)
685 cipher_bits |= CIPHER_ORDER;
686
687
688 cipher_bits |= cipher_parms->alg << CIPHER_ALG_SHIFT;
689 cipher_bits |= cipher_parms->mode << CIPHER_MODE_SHIFT;
690 cipher_bits |= cipher_parms->type << CIPHER_TYPE_SHIFT;
691
692
693 cipher_bits |= hash_parms->alg << HASH_ALG_SHIFT;
694 cipher_bits |= hash_parms->mode << HASH_MODE_SHIFT;
695 cipher_bits |= hash_parms->type << HASH_TYPE_SHIFT;
696
697
698
699
700
701 if (hash_parms->alg) {
702
703 if (hash_parms->key_len) {
704 memcpy(ptr, hash_parms->key_buf, hash_parms->key_len);
705 ptr += hash_parms->key_len;
706 buf_len += hash_parms->key_len;
707 sctx_words += hash_parms->key_len / 4;
708 }
709
710 if ((cipher_parms->mode == CIPHER_MODE_GCM) ||
711 (cipher_parms->mode == CIPHER_MODE_CCM))
712
713 offset_iv = aead_parms->assoc_size;
714
715
716 if (!req_opts->is_inbound) {
717 if ((cipher_parms->mode == CIPHER_MODE_GCM) ||
718 (cipher_parms->mode == CIPHER_MODE_CCM))
719 ecf_bits |= 1 << INSERT_ICV_SHIFT;
720 } else {
721 ecf_bits |= CHECK_ICV;
722 }
723
724
725 if (hash_parms->digestsize == 64)
726 cipher_bits |= ICV_IS_512;
727 else
728 ecf_bits |=
729 (hash_parms->digestsize / 4) << ICV_SIZE_SHIFT;
730 }
731
732 if (req_opts->bd_suppress)
733 ecf_bits |= BD_SUPPRESS;
734
735
736 if (cipher_parms->alg) {
737 if (cipher_parms->key_len) {
738 memcpy(ptr, cipher_parms->key_buf,
739 cipher_parms->key_len);
740 ptr += cipher_parms->key_len;
741 buf_len += cipher_parms->key_len;
742 sctx_words += cipher_parms->key_len / 4;
743 }
744
745
746
747
748
749 if (cipher_parms->iv_buf && cipher_parms->iv_len) {
750
751 ecf_bits |= SCTX_IV;
752
753
754 memcpy(ptr, cipher_parms->iv_buf, cipher_parms->iv_len);
755
756 ptr += cipher_parms->iv_len;
757 buf_len += cipher_parms->iv_len;
758 sctx_words += cipher_parms->iv_len / 4;
759 }
760 }
761
762
763
764
765
766 if (req_opts->is_rfc4543) {
767 if (req_opts->is_inbound)
768 data_size -= hash_parms->digestsize;
769 offset_iv = aead_parms->assoc_size + data_size;
770 cipher_len = 0;
771 cipher_offset = offset_iv;
772 auth_len = cipher_offset + aead_parms->data_pad_len;
773 }
774
775
776 protocol_bits |= sctx_words;
777
778
779 spuh->sa.proto_flags = cpu_to_be32(protocol_bits);
780 spuh->sa.cipher_flags = cpu_to_be32(cipher_bits);
781 spuh->sa.ecf = cpu_to_be32(ecf_bits);
782
783
784 bdesc = (struct BDESC_HEADER *)ptr;
785
786 bdesc->offset_mac = cpu_to_be16(auth_offset);
787 bdesc->length_mac = cpu_to_be16(auth_len);
788 bdesc->offset_crypto = cpu_to_be16(cipher_offset);
789 bdesc->length_crypto = cpu_to_be16(cipher_len);
790
791
792
793
794
795 if (cipher_parms->mode == CIPHER_MODE_CCM)
796 auth_len += spum_wordalign_padlen(auth_len);
797
798 bdesc->offset_icv = cpu_to_be16(auth_len);
799 bdesc->offset_iv = cpu_to_be16(offset_iv);
800
801 ptr += sizeof(struct BDESC_HEADER);
802 buf_len += sizeof(struct BDESC_HEADER);
803
804
805
806
807
808
809 bd = (struct BD_HEADER *)ptr;
810 bd->size = cpu_to_be16(real_db_size);
811 bd->prev_length = 0;
812
813 ptr += sizeof(struct BD_HEADER);
814 buf_len += sizeof(struct BD_HEADER);
815
816 packet_dump(" SPU request header: ", spu_hdr, buf_len);
817
818 return buf_len;
819}
820
821
822
823
824
825
826
827
828
829
830
831
832u16 spum_cipher_req_init(u8 *spu_hdr, struct spu_cipher_parms *cipher_parms)
833{
834 struct SPUHEADER *spuh;
835 u32 protocol_bits = 0;
836 u32 cipher_bits = 0;
837 u32 ecf_bits = 0;
838 u8 sctx_words = 0;
839 u8 *ptr = spu_hdr;
840
841 flow_log("%s()\n", __func__);
842 flow_log(" cipher alg:%u mode:%u type %u\n", cipher_parms->alg,
843 cipher_parms->mode, cipher_parms->type);
844 flow_log(" cipher_iv_len: %u\n", cipher_parms->iv_len);
845 flow_log(" key: %d\n", cipher_parms->key_len);
846 flow_dump(" key: ", cipher_parms->key_buf, cipher_parms->key_len);
847
848
849 memset(spu_hdr, 0, sizeof(struct SPUHEADER));
850 ptr += sizeof(struct SPUHEADER);
851
852
853
854 spuh = (struct SPUHEADER *)spu_hdr;
855
856 spuh->mh.op_code = SPU_CRYPTO_OPERATION_GENERIC;
857 spuh->mh.flags |= (MH_SCTX_PRES | MH_BDESC_PRES | MH_BD_PRES);
858
859
860 sctx_words = 3;
861
862
863 if (cipher_parms->alg) {
864 if (cipher_parms->key_len) {
865 ptr += cipher_parms->key_len;
866 sctx_words += cipher_parms->key_len / 4;
867 }
868
869
870
871
872
873 if (cipher_parms->iv_len) {
874
875 ecf_bits |= SCTX_IV;
876 ptr += cipher_parms->iv_len;
877 sctx_words += cipher_parms->iv_len / 4;
878 }
879 }
880
881
882 cipher_bits |= cipher_parms->alg << CIPHER_ALG_SHIFT;
883 cipher_bits |= cipher_parms->mode << CIPHER_MODE_SHIFT;
884 cipher_bits |= cipher_parms->type << CIPHER_TYPE_SHIFT;
885
886
887 if (cipher_parms->alg && cipher_parms->key_len)
888 memcpy(spuh + 1, cipher_parms->key_buf, cipher_parms->key_len);
889
890
891 protocol_bits |= sctx_words;
892
893
894 spuh->sa.proto_flags = cpu_to_be32(protocol_bits);
895
896
897 spuh->sa.cipher_flags = cpu_to_be32(cipher_bits);
898 spuh->sa.ecf = cpu_to_be32(ecf_bits);
899
900 packet_dump(" SPU request header: ", spu_hdr,
901 sizeof(struct SPUHEADER));
902
903 return sizeof(struct SPUHEADER) + cipher_parms->key_len +
904 cipher_parms->iv_len + sizeof(struct BDESC_HEADER) +
905 sizeof(struct BD_HEADER);
906}
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922void spum_cipher_req_finish(u8 *spu_hdr,
923 u16 spu_req_hdr_len,
924 unsigned int is_inbound,
925 struct spu_cipher_parms *cipher_parms,
926 unsigned int data_size)
927{
928 struct SPUHEADER *spuh;
929 struct BDESC_HEADER *bdesc;
930 struct BD_HEADER *bd;
931 u8 *bdesc_ptr = spu_hdr + spu_req_hdr_len -
932 (sizeof(struct BD_HEADER) + sizeof(struct BDESC_HEADER));
933
934 u32 cipher_bits;
935
936 flow_log("%s()\n", __func__);
937 flow_log(" in: %u\n", is_inbound);
938 flow_log(" cipher alg: %u, cipher_type: %u\n", cipher_parms->alg,
939 cipher_parms->type);
940
941
942
943
944
945
946
947
948 if (cipher_parms->mode == CIPHER_MODE_XTS)
949 memset(cipher_parms->iv_buf, 0, cipher_parms->iv_len);
950
951 flow_log(" iv len: %d\n", cipher_parms->iv_len);
952 flow_dump(" iv: ", cipher_parms->iv_buf, cipher_parms->iv_len);
953 flow_log(" data_size: %u\n", data_size);
954
955
956
957 spuh = (struct SPUHEADER *)spu_hdr;
958
959
960 cipher_bits = be32_to_cpu(spuh->sa.cipher_flags);
961
962
963 if (is_inbound)
964 cipher_bits |= CIPHER_INBOUND;
965 else
966 cipher_bits &= ~CIPHER_INBOUND;
967
968 if (cipher_parms->alg && cipher_parms->iv_buf && cipher_parms->iv_len)
969
970 memcpy(bdesc_ptr - cipher_parms->iv_len, cipher_parms->iv_buf,
971 cipher_parms->iv_len);
972
973 spuh->sa.cipher_flags = cpu_to_be32(cipher_bits);
974
975
976 bdesc = (struct BDESC_HEADER *)bdesc_ptr;
977 bdesc->offset_mac = 0;
978 bdesc->length_mac = 0;
979 bdesc->offset_crypto = 0;
980
981
982 if (cipher_parms->mode == CIPHER_MODE_XTS)
983 bdesc->length_crypto = cpu_to_be16(data_size +
984 SPU_XTS_TWEAK_SIZE);
985 else
986 bdesc->length_crypto = cpu_to_be16(data_size);
987
988 bdesc->offset_icv = 0;
989 bdesc->offset_iv = 0;
990
991
992
993
994
995 bd = (struct BD_HEADER *)(bdesc_ptr + sizeof(struct BDESC_HEADER));
996 bd->size = cpu_to_be16(data_size);
997
998
999 if (cipher_parms->mode == CIPHER_MODE_XTS)
1000 bd->size = cpu_to_be16(data_size + SPU_XTS_TWEAK_SIZE);
1001 else
1002 bd->size = cpu_to_be16(data_size);
1003
1004 bd->prev_length = 0;
1005
1006 packet_dump(" SPU request header: ", spu_hdr, spu_req_hdr_len);
1007}
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025void spum_request_pad(u8 *pad_start,
1026 u32 gcm_ccm_padding,
1027 u32 hash_pad_len,
1028 enum hash_alg auth_alg,
1029 enum hash_mode auth_mode,
1030 unsigned int total_sent, u32 status_padding)
1031{
1032 u8 *ptr = pad_start;
1033
1034
1035 if (gcm_ccm_padding > 0) {
1036 flow_log(" GCM: padding to 16 byte alignment: %u bytes\n",
1037 gcm_ccm_padding);
1038 memset(ptr, 0, gcm_ccm_padding);
1039 ptr += gcm_ccm_padding;
1040 }
1041
1042 if (hash_pad_len > 0) {
1043
1044 memset(ptr, 0, hash_pad_len);
1045
1046 if ((auth_alg == HASH_ALG_AES) &&
1047 (auth_mode == HASH_MODE_XCBC)) {
1048
1049 ptr += hash_pad_len;
1050 } else {
1051
1052 *ptr = 0x80;
1053 ptr += (hash_pad_len - sizeof(u64));
1054
1055
1056 if (auth_alg == HASH_ALG_MD5)
1057 *(__le64 *)ptr = cpu_to_le64(total_sent * 8ull);
1058 else
1059 *(__be64 *)ptr = cpu_to_be64(total_sent * 8ull);
1060 ptr += sizeof(u64);
1061 }
1062 }
1063
1064
1065 if (status_padding > 0) {
1066 flow_log(" STAT: padding to 4 byte alignment: %u bytes\n",
1067 status_padding);
1068
1069 memset(ptr, 0, status_padding);
1070 ptr += status_padding;
1071 }
1072}
1073
1074
1075
1076
1077
1078
1079
1080u8 spum_xts_tweak_in_payload(void)
1081{
1082 return 1;
1083}
1084
1085
1086
1087
1088
1089
1090
1091u8 spum_tx_status_len(void)
1092{
1093 return SPU_TX_STATUS_LEN;
1094}
1095
1096
1097
1098
1099
1100
1101
1102u8 spum_rx_status_len(void)
1103{
1104 return SPU_RX_STATUS_LEN;
1105}
1106
1107
1108
1109
1110
1111
1112
1113
1114int spum_status_process(u8 *statp)
1115{
1116 u32 status;
1117
1118 status = __be32_to_cpu(*(__be32 *)statp);
1119 flow_log("SPU response STATUS %#08x\n", status);
1120 if (status & SPU_STATUS_ERROR_FLAG) {
1121 pr_err("%s() Warning: Error result from SPU: %#08x\n",
1122 __func__, status);
1123 if (status & SPU_STATUS_INVALID_ICV)
1124 return SPU_INVALID_ICV;
1125 return -EBADMSG;
1126 }
1127 return 0;
1128}
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141void spum_ccm_update_iv(unsigned int digestsize,
1142 struct spu_cipher_parms *cipher_parms,
1143 unsigned int assoclen,
1144 unsigned int chunksize,
1145 bool is_encrypt,
1146 bool is_esp)
1147{
1148 u8 L;
1149 u8 mprime;
1150 u8 adata;
1151
1152 if (cipher_parms->iv_len != CCM_AES_IV_SIZE) {
1153 pr_err("%s(): Invalid IV len %d for CCM mode, should be %d\n",
1154 __func__, cipher_parms->iv_len, CCM_AES_IV_SIZE);
1155 return;
1156 }
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179 if (is_esp) {
1180 L = CCM_ESP_L_VALUE;
1181 } else {
1182
1183 L = ((cipher_parms->iv_buf[0] & CCM_B0_L_PRIME) >>
1184 CCM_B0_L_PRIME_SHIFT) + 1;
1185 }
1186
1187 mprime = (digestsize - 2) >> 1;
1188 adata = (assoclen > 0);
1189
1190 cipher_parms->iv_buf[0] = (adata << CCM_B0_ADATA_SHIFT) |
1191 (mprime << CCM_B0_M_PRIME_SHIFT) |
1192 ((L - 1) << CCM_B0_L_PRIME_SHIFT);
1193
1194
1195
1196
1197 if (!is_encrypt)
1198 chunksize -= digestsize;
1199
1200
1201 format_value_ccm(chunksize, &cipher_parms->iv_buf[15 - L + 1], L);
1202}
1203
1204
1205
1206
1207
1208
1209
1210
1211u32 spum_wordalign_padlen(u32 data_size)
1212{
1213 return ((data_size + 3) & ~3) - data_size;
1214}
1215