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1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * AMCC SoC PPC4xx Crypto Driver
4 *
5 * Copyright (c) 2008 Applied Micro Circuits Corporation.
6 * All rights reserved. James Hsiao <jhsiao@amcc.com>
7 *
8 * This file implements the Linux crypto algorithms.
9 */
10
11#include <linux/kernel.h>
12#include <linux/interrupt.h>
13#include <linux/spinlock_types.h>
14#include <linux/scatterlist.h>
15#include <linux/crypto.h>
16#include <linux/hash.h>
17#include <crypto/internal/hash.h>
18#include <linux/dma-mapping.h>
19#include <crypto/algapi.h>
20#include <crypto/aead.h>
21#include <crypto/aes.h>
22#include <crypto/gcm.h>
23#include <crypto/sha1.h>
24#include <crypto/ctr.h>
25#include <crypto/skcipher.h>
26#include "crypto4xx_reg_def.h"
27#include "crypto4xx_core.h"
28#include "crypto4xx_sa.h"
29
30static void set_dynamic_sa_command_0(struct dynamic_sa_ctl *sa, u32 save_h,
31 u32 save_iv, u32 ld_h, u32 ld_iv,
32 u32 hdr_proc, u32 h, u32 c, u32 pad_type,
33 u32 op_grp, u32 op, u32 dir)
34{
35 sa->sa_command_0.w = 0;
36 sa->sa_command_0.bf.save_hash_state = save_h;
37 sa->sa_command_0.bf.save_iv = save_iv;
38 sa->sa_command_0.bf.load_hash_state = ld_h;
39 sa->sa_command_0.bf.load_iv = ld_iv;
40 sa->sa_command_0.bf.hdr_proc = hdr_proc;
41 sa->sa_command_0.bf.hash_alg = h;
42 sa->sa_command_0.bf.cipher_alg = c;
43 sa->sa_command_0.bf.pad_type = pad_type & 3;
44 sa->sa_command_0.bf.extend_pad = pad_type >> 2;
45 sa->sa_command_0.bf.op_group = op_grp;
46 sa->sa_command_0.bf.opcode = op;
47 sa->sa_command_0.bf.dir = dir;
48}
49
50static void set_dynamic_sa_command_1(struct dynamic_sa_ctl *sa, u32 cm,
51 u32 hmac_mc, u32 cfb, u32 esn,
52 u32 sn_mask, u32 mute, u32 cp_pad,
53 u32 cp_pay, u32 cp_hdr)
54{
55 sa->sa_command_1.w = 0;
56 sa->sa_command_1.bf.crypto_mode31 = (cm & 4) >> 2;
57 sa->sa_command_1.bf.crypto_mode9_8 = cm & 3;
58 sa->sa_command_1.bf.feedback_mode = cfb;
59 sa->sa_command_1.bf.sa_rev = 1;
60 sa->sa_command_1.bf.hmac_muting = hmac_mc;
61 sa->sa_command_1.bf.extended_seq_num = esn;
62 sa->sa_command_1.bf.seq_num_mask = sn_mask;
63 sa->sa_command_1.bf.mutable_bit_proc = mute;
64 sa->sa_command_1.bf.copy_pad = cp_pad;
65 sa->sa_command_1.bf.copy_payload = cp_pay;
66 sa->sa_command_1.bf.copy_hdr = cp_hdr;
67}
68
69static inline int crypto4xx_crypt(struct skcipher_request *req,
70 const unsigned int ivlen, bool decrypt,
71 bool check_blocksize)
72{
73 struct crypto_skcipher *cipher = crypto_skcipher_reqtfm(req);
74 struct crypto4xx_ctx *ctx = crypto_skcipher_ctx(cipher);
75 __le32 iv[AES_IV_SIZE];
76
77 if (check_blocksize && !IS_ALIGNED(req->cryptlen, AES_BLOCK_SIZE))
78 return -EINVAL;
79
80 if (ivlen)
81 crypto4xx_memcpy_to_le32(iv, req->iv, ivlen);
82
83 return crypto4xx_build_pd(&req->base, ctx, req->src, req->dst,
84 req->cryptlen, iv, ivlen, decrypt ? ctx->sa_in : ctx->sa_out,
85 ctx->sa_len, 0, NULL);
86}
87
88int crypto4xx_encrypt_noiv_block(struct skcipher_request *req)
89{
90 return crypto4xx_crypt(req, 0, false, true);
91}
92
93int crypto4xx_encrypt_iv_stream(struct skcipher_request *req)
94{
95 return crypto4xx_crypt(req, AES_IV_SIZE, false, false);
96}
97
98int crypto4xx_decrypt_noiv_block(struct skcipher_request *req)
99{
100 return crypto4xx_crypt(req, 0, true, true);
101}
102
103int crypto4xx_decrypt_iv_stream(struct skcipher_request *req)
104{
105 return crypto4xx_crypt(req, AES_IV_SIZE, true, false);
106}
107
108int crypto4xx_encrypt_iv_block(struct skcipher_request *req)
109{
110 return crypto4xx_crypt(req, AES_IV_SIZE, false, true);
111}
112
113int crypto4xx_decrypt_iv_block(struct skcipher_request *req)
114{
115 return crypto4xx_crypt(req, AES_IV_SIZE, true, true);
116}
117
118/*
119 * AES Functions
120 */
121static int crypto4xx_setkey_aes(struct crypto_skcipher *cipher,
122 const u8 *key,
123 unsigned int keylen,
124 unsigned char cm,
125 u8 fb)
126{
127 struct crypto4xx_ctx *ctx = crypto_skcipher_ctx(cipher);
128 struct dynamic_sa_ctl *sa;
129 int rc;
130
131 if (keylen != AES_KEYSIZE_256 && keylen != AES_KEYSIZE_192 &&
132 keylen != AES_KEYSIZE_128)
133 return -EINVAL;
134
135 /* Create SA */
136 if (ctx->sa_in || ctx->sa_out)
137 crypto4xx_free_sa(ctx);
138
139 rc = crypto4xx_alloc_sa(ctx, SA_AES128_LEN + (keylen-16) / 4);
140 if (rc)
141 return rc;
142
143 /* Setup SA */
144 sa = ctx->sa_in;
145
146 set_dynamic_sa_command_0(sa, SA_NOT_SAVE_HASH, (cm == CRYPTO_MODE_ECB ?
147 SA_NOT_SAVE_IV : SA_SAVE_IV),
148 SA_NOT_LOAD_HASH, (cm == CRYPTO_MODE_ECB ?
149 SA_LOAD_IV_FROM_SA : SA_LOAD_IV_FROM_STATE),
150 SA_NO_HEADER_PROC, SA_HASH_ALG_NULL,
151 SA_CIPHER_ALG_AES, SA_PAD_TYPE_ZERO,
152 SA_OP_GROUP_BASIC, SA_OPCODE_DECRYPT,
153 DIR_INBOUND);
154
155 set_dynamic_sa_command_1(sa, cm, SA_HASH_MODE_HASH,
156 fb, SA_EXTENDED_SN_OFF,
157 SA_SEQ_MASK_OFF, SA_MC_ENABLE,
158 SA_NOT_COPY_PAD, SA_NOT_COPY_PAYLOAD,
159 SA_NOT_COPY_HDR);
160 crypto4xx_memcpy_to_le32(get_dynamic_sa_key_field(sa),
161 key, keylen);
162 sa->sa_contents.w = SA_AES_CONTENTS | (keylen << 2);
163 sa->sa_command_1.bf.key_len = keylen >> 3;
164
165 memcpy(ctx->sa_out, ctx->sa_in, ctx->sa_len * 4);
166 sa = ctx->sa_out;
167 sa->sa_command_0.bf.dir = DIR_OUTBOUND;
168 /*
169 * SA_OPCODE_ENCRYPT is the same value as SA_OPCODE_DECRYPT.
170 * it's the DIR_(IN|OUT)BOUND that matters
171 */
172 sa->sa_command_0.bf.opcode = SA_OPCODE_ENCRYPT;
173
174 return 0;
175}
176
177int crypto4xx_setkey_aes_cbc(struct crypto_skcipher *cipher,
178 const u8 *key, unsigned int keylen)
179{
180 return crypto4xx_setkey_aes(cipher, key, keylen, CRYPTO_MODE_CBC,
181 CRYPTO_FEEDBACK_MODE_NO_FB);
182}
183
184int crypto4xx_setkey_aes_ecb(struct crypto_skcipher *cipher,
185 const u8 *key, unsigned int keylen)
186{
187 return crypto4xx_setkey_aes(cipher, key, keylen, CRYPTO_MODE_ECB,
188 CRYPTO_FEEDBACK_MODE_NO_FB);
189}
190
191int crypto4xx_setkey_rfc3686(struct crypto_skcipher *cipher,
192 const u8 *key, unsigned int keylen)
193{
194 struct crypto4xx_ctx *ctx = crypto_skcipher_ctx(cipher);
195 int rc;
196
197 rc = crypto4xx_setkey_aes(cipher, key, keylen - CTR_RFC3686_NONCE_SIZE,
198 CRYPTO_MODE_CTR, CRYPTO_FEEDBACK_MODE_NO_FB);
199 if (rc)
200 return rc;
201
202 ctx->iv_nonce = cpu_to_le32p((u32 *)&key[keylen -
203 CTR_RFC3686_NONCE_SIZE]);
204
205 return 0;
206}
207
208int crypto4xx_rfc3686_encrypt(struct skcipher_request *req)
209{
210 struct crypto_skcipher *cipher = crypto_skcipher_reqtfm(req);
211 struct crypto4xx_ctx *ctx = crypto_skcipher_ctx(cipher);
212 __le32 iv[AES_IV_SIZE / 4] = {
213 ctx->iv_nonce,
214 cpu_to_le32p((u32 *) req->iv),
215 cpu_to_le32p((u32 *) (req->iv + 4)),
216 cpu_to_le32(1) };
217
218 return crypto4xx_build_pd(&req->base, ctx, req->src, req->dst,
219 req->cryptlen, iv, AES_IV_SIZE,
220 ctx->sa_out, ctx->sa_len, 0, NULL);
221}
222
223int crypto4xx_rfc3686_decrypt(struct skcipher_request *req)
224{
225 struct crypto_skcipher *cipher = crypto_skcipher_reqtfm(req);
226 struct crypto4xx_ctx *ctx = crypto_skcipher_ctx(cipher);
227 __le32 iv[AES_IV_SIZE / 4] = {
228 ctx->iv_nonce,
229 cpu_to_le32p((u32 *) req->iv),
230 cpu_to_le32p((u32 *) (req->iv + 4)),
231 cpu_to_le32(1) };
232
233 return crypto4xx_build_pd(&req->base, ctx, req->src, req->dst,
234 req->cryptlen, iv, AES_IV_SIZE,
235 ctx->sa_out, ctx->sa_len, 0, NULL);
236}
237
238static int
239crypto4xx_ctr_crypt(struct skcipher_request *req, bool encrypt)
240{
241 struct crypto_skcipher *cipher = crypto_skcipher_reqtfm(req);
242 struct crypto4xx_ctx *ctx = crypto_skcipher_ctx(cipher);
243 size_t iv_len = crypto_skcipher_ivsize(cipher);
244 unsigned int counter = be32_to_cpup((__be32 *)(req->iv + iv_len - 4));
245 unsigned int nblks = ALIGN(req->cryptlen, AES_BLOCK_SIZE) /
246 AES_BLOCK_SIZE;
247
248 /*
249 * The hardware uses only the last 32-bits as the counter while the
250 * kernel tests (aes_ctr_enc_tv_template[4] for example) expect that
251 * the whole IV is a counter. So fallback if the counter is going to
252 * overlow.
253 */
254 if (counter + nblks < counter) {
255 SYNC_SKCIPHER_REQUEST_ON_STACK(subreq, ctx->sw_cipher.cipher);
256 int ret;
257
258 skcipher_request_set_sync_tfm(subreq, ctx->sw_cipher.cipher);
259 skcipher_request_set_callback(subreq, req->base.flags,
260 NULL, NULL);
261 skcipher_request_set_crypt(subreq, req->src, req->dst,
262 req->cryptlen, req->iv);
263 ret = encrypt ? crypto_skcipher_encrypt(subreq)
264 : crypto_skcipher_decrypt(subreq);
265 skcipher_request_zero(subreq);
266 return ret;
267 }
268
269 return encrypt ? crypto4xx_encrypt_iv_stream(req)
270 : crypto4xx_decrypt_iv_stream(req);
271}
272
273static int crypto4xx_sk_setup_fallback(struct crypto4xx_ctx *ctx,
274 struct crypto_skcipher *cipher,
275 const u8 *key,
276 unsigned int keylen)
277{
278 crypto_sync_skcipher_clear_flags(ctx->sw_cipher.cipher,
279 CRYPTO_TFM_REQ_MASK);
280 crypto_sync_skcipher_set_flags(ctx->sw_cipher.cipher,
281 crypto_skcipher_get_flags(cipher) & CRYPTO_TFM_REQ_MASK);
282 return crypto_sync_skcipher_setkey(ctx->sw_cipher.cipher, key, keylen);
283}
284
285int crypto4xx_setkey_aes_ctr(struct crypto_skcipher *cipher,
286 const u8 *key, unsigned int keylen)
287{
288 struct crypto4xx_ctx *ctx = crypto_skcipher_ctx(cipher);
289 int rc;
290
291 rc = crypto4xx_sk_setup_fallback(ctx, cipher, key, keylen);
292 if (rc)
293 return rc;
294
295 return crypto4xx_setkey_aes(cipher, key, keylen,
296 CRYPTO_MODE_CTR, CRYPTO_FEEDBACK_MODE_NO_FB);
297}
298
299int crypto4xx_encrypt_ctr(struct skcipher_request *req)
300{
301 return crypto4xx_ctr_crypt(req, true);
302}
303
304int crypto4xx_decrypt_ctr(struct skcipher_request *req)
305{
306 return crypto4xx_ctr_crypt(req, false);
307}
308
309static inline bool crypto4xx_aead_need_fallback(struct aead_request *req,
310 unsigned int len,
311 bool is_ccm, bool decrypt)
312{
313 struct crypto_aead *aead = crypto_aead_reqtfm(req);
314
315 /* authsize has to be a multiple of 4 */
316 if (aead->authsize & 3)
317 return true;
318
319 /*
320 * hardware does not handle cases where plaintext
321 * is less than a block.
322 */
323 if (len < AES_BLOCK_SIZE)
324 return true;
325
326 /* assoc len needs to be a multiple of 4 and <= 1020 */
327 if (req->assoclen & 0x3 || req->assoclen > 1020)
328 return true;
329
330 /* CCM supports only counter field length of 2 and 4 bytes */
331 if (is_ccm && !(req->iv[0] == 1 || req->iv[0] == 3))
332 return true;
333
334 return false;
335}
336
337static int crypto4xx_aead_fallback(struct aead_request *req,
338 struct crypto4xx_ctx *ctx, bool do_decrypt)
339{
340 struct aead_request *subreq = aead_request_ctx(req);
341
342 aead_request_set_tfm(subreq, ctx->sw_cipher.aead);
343 aead_request_set_callback(subreq, req->base.flags,
344 req->base.complete, req->base.data);
345 aead_request_set_crypt(subreq, req->src, req->dst, req->cryptlen,
346 req->iv);
347 aead_request_set_ad(subreq, req->assoclen);
348 return do_decrypt ? crypto_aead_decrypt(subreq) :
349 crypto_aead_encrypt(subreq);
350}
351
352static int crypto4xx_aead_setup_fallback(struct crypto4xx_ctx *ctx,
353 struct crypto_aead *cipher,
354 const u8 *key,
355 unsigned int keylen)
356{
357 crypto_aead_clear_flags(ctx->sw_cipher.aead, CRYPTO_TFM_REQ_MASK);
358 crypto_aead_set_flags(ctx->sw_cipher.aead,
359 crypto_aead_get_flags(cipher) & CRYPTO_TFM_REQ_MASK);
360 return crypto_aead_setkey(ctx->sw_cipher.aead, key, keylen);
361}
362
363/*
364 * AES-CCM Functions
365 */
366
367int crypto4xx_setkey_aes_ccm(struct crypto_aead *cipher, const u8 *key,
368 unsigned int keylen)
369{
370 struct crypto_tfm *tfm = crypto_aead_tfm(cipher);
371 struct crypto4xx_ctx *ctx = crypto_tfm_ctx(tfm);
372 struct dynamic_sa_ctl *sa;
373 int rc = 0;
374
375 rc = crypto4xx_aead_setup_fallback(ctx, cipher, key, keylen);
376 if (rc)
377 return rc;
378
379 if (ctx->sa_in || ctx->sa_out)
380 crypto4xx_free_sa(ctx);
381
382 rc = crypto4xx_alloc_sa(ctx, SA_AES128_CCM_LEN + (keylen - 16) / 4);
383 if (rc)
384 return rc;
385
386 /* Setup SA */
387 sa = (struct dynamic_sa_ctl *) ctx->sa_in;
388 sa->sa_contents.w = SA_AES_CCM_CONTENTS | (keylen << 2);
389
390 set_dynamic_sa_command_0(sa, SA_SAVE_HASH, SA_NOT_SAVE_IV,
391 SA_LOAD_HASH_FROM_SA, SA_LOAD_IV_FROM_STATE,
392 SA_NO_HEADER_PROC, SA_HASH_ALG_CBC_MAC,
393 SA_CIPHER_ALG_AES,
394 SA_PAD_TYPE_ZERO, SA_OP_GROUP_BASIC,
395 SA_OPCODE_HASH_DECRYPT, DIR_INBOUND);
396
397 set_dynamic_sa_command_1(sa, CRYPTO_MODE_CTR, SA_HASH_MODE_HASH,
398 CRYPTO_FEEDBACK_MODE_NO_FB, SA_EXTENDED_SN_OFF,
399 SA_SEQ_MASK_OFF, SA_MC_ENABLE,
400 SA_NOT_COPY_PAD, SA_COPY_PAYLOAD,
401 SA_NOT_COPY_HDR);
402
403 sa->sa_command_1.bf.key_len = keylen >> 3;
404
405 crypto4xx_memcpy_to_le32(get_dynamic_sa_key_field(sa), key, keylen);
406
407 memcpy(ctx->sa_out, ctx->sa_in, ctx->sa_len * 4);
408 sa = (struct dynamic_sa_ctl *) ctx->sa_out;
409
410 set_dynamic_sa_command_0(sa, SA_SAVE_HASH, SA_NOT_SAVE_IV,
411 SA_LOAD_HASH_FROM_SA, SA_LOAD_IV_FROM_STATE,
412 SA_NO_HEADER_PROC, SA_HASH_ALG_CBC_MAC,
413 SA_CIPHER_ALG_AES,
414 SA_PAD_TYPE_ZERO, SA_OP_GROUP_BASIC,
415 SA_OPCODE_ENCRYPT_HASH, DIR_OUTBOUND);
416
417 set_dynamic_sa_command_1(sa, CRYPTO_MODE_CTR, SA_HASH_MODE_HASH,
418 CRYPTO_FEEDBACK_MODE_NO_FB, SA_EXTENDED_SN_OFF,
419 SA_SEQ_MASK_OFF, SA_MC_ENABLE,
420 SA_COPY_PAD, SA_COPY_PAYLOAD,
421 SA_NOT_COPY_HDR);
422
423 sa->sa_command_1.bf.key_len = keylen >> 3;
424 return 0;
425}
426
427static int crypto4xx_crypt_aes_ccm(struct aead_request *req, bool decrypt)
428{
429 struct crypto4xx_ctx *ctx = crypto_tfm_ctx(req->base.tfm);
430 struct crypto4xx_aead_reqctx *rctx = aead_request_ctx(req);
431 struct crypto_aead *aead = crypto_aead_reqtfm(req);
432 __le32 iv[16];
433 u32 tmp_sa[SA_AES128_CCM_LEN + 4];
434 struct dynamic_sa_ctl *sa = (struct dynamic_sa_ctl *)tmp_sa;
435 unsigned int len = req->cryptlen;
436
437 if (decrypt)
438 len -= crypto_aead_authsize(aead);
439
440 if (crypto4xx_aead_need_fallback(req, len, true, decrypt))
441 return crypto4xx_aead_fallback(req, ctx, decrypt);
442
443 memcpy(tmp_sa, decrypt ? ctx->sa_in : ctx->sa_out, ctx->sa_len * 4);
444 sa->sa_command_0.bf.digest_len = crypto_aead_authsize(aead) >> 2;
445
446 if (req->iv[0] == 1) {
447 /* CRYPTO_MODE_AES_ICM */
448 sa->sa_command_1.bf.crypto_mode9_8 = 1;
449 }
450
451 iv[3] = cpu_to_le32(0);
452 crypto4xx_memcpy_to_le32(iv, req->iv, 16 - (req->iv[0] + 1));
453
454 return crypto4xx_build_pd(&req->base, ctx, req->src, req->dst,
455 len, iv, sizeof(iv),
456 sa, ctx->sa_len, req->assoclen, rctx->dst);
457}
458
459int crypto4xx_encrypt_aes_ccm(struct aead_request *req)
460{
461 return crypto4xx_crypt_aes_ccm(req, false);
462}
463
464int crypto4xx_decrypt_aes_ccm(struct aead_request *req)
465{
466 return crypto4xx_crypt_aes_ccm(req, true);
467}
468
469int crypto4xx_setauthsize_aead(struct crypto_aead *cipher,
470 unsigned int authsize)
471{
472 struct crypto_tfm *tfm = crypto_aead_tfm(cipher);
473 struct crypto4xx_ctx *ctx = crypto_tfm_ctx(tfm);
474
475 return crypto_aead_setauthsize(ctx->sw_cipher.aead, authsize);
476}
477
478/*
479 * AES-GCM Functions
480 */
481
482static int crypto4xx_aes_gcm_validate_keylen(unsigned int keylen)
483{
484 switch (keylen) {
485 case 16:
486 case 24:
487 case 32:
488 return 0;
489 default:
490 return -EINVAL;
491 }
492}
493
494static int crypto4xx_compute_gcm_hash_key_sw(__le32 *hash_start, const u8 *key,
495 unsigned int keylen)
496{
497 struct crypto_aes_ctx ctx;
498 uint8_t src[16] = { 0 };
499 int rc;
500
501 rc = aes_expandkey(&ctx, key, keylen);
502 if (rc) {
503 pr_err("aes_expandkey() failed: %d\n", rc);
504 return rc;
505 }
506
507 aes_encrypt(&ctx, src, src);
508 crypto4xx_memcpy_to_le32(hash_start, src, 16);
509 memzero_explicit(&ctx, sizeof(ctx));
510 return 0;
511}
512
513int crypto4xx_setkey_aes_gcm(struct crypto_aead *cipher,
514 const u8 *key, unsigned int keylen)
515{
516 struct crypto_tfm *tfm = crypto_aead_tfm(cipher);
517 struct crypto4xx_ctx *ctx = crypto_tfm_ctx(tfm);
518 struct dynamic_sa_ctl *sa;
519 int rc = 0;
520
521 if (crypto4xx_aes_gcm_validate_keylen(keylen) != 0)
522 return -EINVAL;
523
524 rc = crypto4xx_aead_setup_fallback(ctx, cipher, key, keylen);
525 if (rc)
526 return rc;
527
528 if (ctx->sa_in || ctx->sa_out)
529 crypto4xx_free_sa(ctx);
530
531 rc = crypto4xx_alloc_sa(ctx, SA_AES128_GCM_LEN + (keylen - 16) / 4);
532 if (rc)
533 return rc;
534
535 sa = (struct dynamic_sa_ctl *) ctx->sa_in;
536
537 sa->sa_contents.w = SA_AES_GCM_CONTENTS | (keylen << 2);
538 set_dynamic_sa_command_0(sa, SA_SAVE_HASH, SA_NOT_SAVE_IV,
539 SA_LOAD_HASH_FROM_SA, SA_LOAD_IV_FROM_STATE,
540 SA_NO_HEADER_PROC, SA_HASH_ALG_GHASH,
541 SA_CIPHER_ALG_AES, SA_PAD_TYPE_ZERO,
542 SA_OP_GROUP_BASIC, SA_OPCODE_HASH_DECRYPT,
543 DIR_INBOUND);
544 set_dynamic_sa_command_1(sa, CRYPTO_MODE_CTR, SA_HASH_MODE_HASH,
545 CRYPTO_FEEDBACK_MODE_NO_FB, SA_EXTENDED_SN_OFF,
546 SA_SEQ_MASK_ON, SA_MC_DISABLE,
547 SA_NOT_COPY_PAD, SA_COPY_PAYLOAD,
548 SA_NOT_COPY_HDR);
549
550 sa->sa_command_1.bf.key_len = keylen >> 3;
551
552 crypto4xx_memcpy_to_le32(get_dynamic_sa_key_field(sa),
553 key, keylen);
554
555 rc = crypto4xx_compute_gcm_hash_key_sw(get_dynamic_sa_inner_digest(sa),
556 key, keylen);
557 if (rc) {
558 pr_err("GCM hash key setting failed = %d\n", rc);
559 goto err;
560 }
561
562 memcpy(ctx->sa_out, ctx->sa_in, ctx->sa_len * 4);
563 sa = (struct dynamic_sa_ctl *) ctx->sa_out;
564 sa->sa_command_0.bf.dir = DIR_OUTBOUND;
565 sa->sa_command_0.bf.opcode = SA_OPCODE_ENCRYPT_HASH;
566
567 return 0;
568err:
569 crypto4xx_free_sa(ctx);
570 return rc;
571}
572
573static inline int crypto4xx_crypt_aes_gcm(struct aead_request *req,
574 bool decrypt)
575{
576 struct crypto4xx_ctx *ctx = crypto_tfm_ctx(req->base.tfm);
577 struct crypto4xx_aead_reqctx *rctx = aead_request_ctx(req);
578 __le32 iv[4];
579 unsigned int len = req->cryptlen;
580
581 if (decrypt)
582 len -= crypto_aead_authsize(crypto_aead_reqtfm(req));
583
584 if (crypto4xx_aead_need_fallback(req, len, false, decrypt))
585 return crypto4xx_aead_fallback(req, ctx, decrypt);
586
587 crypto4xx_memcpy_to_le32(iv, req->iv, GCM_AES_IV_SIZE);
588 iv[3] = cpu_to_le32(1);
589
590 return crypto4xx_build_pd(&req->base, ctx, req->src, req->dst,
591 len, iv, sizeof(iv),
592 decrypt ? ctx->sa_in : ctx->sa_out,
593 ctx->sa_len, req->assoclen, rctx->dst);
594}
595
596int crypto4xx_encrypt_aes_gcm(struct aead_request *req)
597{
598 return crypto4xx_crypt_aes_gcm(req, false);
599}
600
601int crypto4xx_decrypt_aes_gcm(struct aead_request *req)
602{
603 return crypto4xx_crypt_aes_gcm(req, true);
604}
605
606/*
607 * HASH SHA1 Functions
608 */
609static int crypto4xx_hash_alg_init(struct crypto_tfm *tfm,
610 unsigned int sa_len,
611 unsigned char ha,
612 unsigned char hm)
613{
614 struct crypto_alg *alg = tfm->__crt_alg;
615 struct crypto4xx_alg *my_alg;
616 struct crypto4xx_ctx *ctx = crypto_tfm_ctx(tfm);
617 struct dynamic_sa_hash160 *sa;
618 int rc;
619
620 my_alg = container_of(__crypto_ahash_alg(alg), struct crypto4xx_alg,
621 alg.u.hash);
622 ctx->dev = my_alg->dev;
623
624 /* Create SA */
625 if (ctx->sa_in || ctx->sa_out)
626 crypto4xx_free_sa(ctx);
627
628 rc = crypto4xx_alloc_sa(ctx, sa_len);
629 if (rc)
630 return rc;
631
632 crypto_ahash_set_reqsize(__crypto_ahash_cast(tfm),
633 sizeof(struct crypto4xx_ctx));
634 sa = (struct dynamic_sa_hash160 *)ctx->sa_in;
635 set_dynamic_sa_command_0(&sa->ctrl, SA_SAVE_HASH, SA_NOT_SAVE_IV,
636 SA_NOT_LOAD_HASH, SA_LOAD_IV_FROM_SA,
637 SA_NO_HEADER_PROC, ha, SA_CIPHER_ALG_NULL,
638 SA_PAD_TYPE_ZERO, SA_OP_GROUP_BASIC,
639 SA_OPCODE_HASH, DIR_INBOUND);
640 set_dynamic_sa_command_1(&sa->ctrl, 0, SA_HASH_MODE_HASH,
641 CRYPTO_FEEDBACK_MODE_NO_FB, SA_EXTENDED_SN_OFF,
642 SA_SEQ_MASK_OFF, SA_MC_ENABLE,
643 SA_NOT_COPY_PAD, SA_NOT_COPY_PAYLOAD,
644 SA_NOT_COPY_HDR);
645 /* Need to zero hash digest in SA */
646 memset(sa->inner_digest, 0, sizeof(sa->inner_digest));
647 memset(sa->outer_digest, 0, sizeof(sa->outer_digest));
648
649 return 0;
650}
651
652int crypto4xx_hash_init(struct ahash_request *req)
653{
654 struct crypto4xx_ctx *ctx = crypto_tfm_ctx(req->base.tfm);
655 int ds;
656 struct dynamic_sa_ctl *sa;
657
658 sa = ctx->sa_in;
659 ds = crypto_ahash_digestsize(
660 __crypto_ahash_cast(req->base.tfm));
661 sa->sa_command_0.bf.digest_len = ds >> 2;
662 sa->sa_command_0.bf.load_hash_state = SA_LOAD_HASH_FROM_SA;
663
664 return 0;
665}
666
667int crypto4xx_hash_update(struct ahash_request *req)
668{
669 struct crypto_ahash *ahash = crypto_ahash_reqtfm(req);
670 struct crypto4xx_ctx *ctx = crypto_tfm_ctx(req->base.tfm);
671 struct scatterlist dst;
672 unsigned int ds = crypto_ahash_digestsize(ahash);
673
674 sg_init_one(&dst, req->result, ds);
675
676 return crypto4xx_build_pd(&req->base, ctx, req->src, &dst,
677 req->nbytes, NULL, 0, ctx->sa_in,
678 ctx->sa_len, 0, NULL);
679}
680
681int crypto4xx_hash_final(struct ahash_request *req)
682{
683 return 0;
684}
685
686int crypto4xx_hash_digest(struct ahash_request *req)
687{
688 struct crypto_ahash *ahash = crypto_ahash_reqtfm(req);
689 struct crypto4xx_ctx *ctx = crypto_tfm_ctx(req->base.tfm);
690 struct scatterlist dst;
691 unsigned int ds = crypto_ahash_digestsize(ahash);
692
693 sg_init_one(&dst, req->result, ds);
694
695 return crypto4xx_build_pd(&req->base, ctx, req->src, &dst,
696 req->nbytes, NULL, 0, ctx->sa_in,
697 ctx->sa_len, 0, NULL);
698}
699
700/*
701 * SHA1 Algorithm
702 */
703int crypto4xx_sha1_alg_init(struct crypto_tfm *tfm)
704{
705 return crypto4xx_hash_alg_init(tfm, SA_HASH160_LEN, SA_HASH_ALG_SHA1,
706 SA_HASH_MODE_HASH);
707}
1/**
2 * AMCC SoC PPC4xx Crypto Driver
3 *
4 * Copyright (c) 2008 Applied Micro Circuits Corporation.
5 * All rights reserved. James Hsiao <jhsiao@amcc.com>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * This file implements the Linux crypto algorithms.
18 */
19
20#include <linux/kernel.h>
21#include <linux/interrupt.h>
22#include <linux/spinlock_types.h>
23#include <linux/scatterlist.h>
24#include <linux/crypto.h>
25#include <linux/hash.h>
26#include <crypto/internal/hash.h>
27#include <linux/dma-mapping.h>
28#include <crypto/algapi.h>
29#include <crypto/aead.h>
30#include <crypto/aes.h>
31#include <crypto/gcm.h>
32#include <crypto/sha.h>
33#include <crypto/ctr.h>
34#include "crypto4xx_reg_def.h"
35#include "crypto4xx_core.h"
36#include "crypto4xx_sa.h"
37
38static void set_dynamic_sa_command_0(struct dynamic_sa_ctl *sa, u32 save_h,
39 u32 save_iv, u32 ld_h, u32 ld_iv,
40 u32 hdr_proc, u32 h, u32 c, u32 pad_type,
41 u32 op_grp, u32 op, u32 dir)
42{
43 sa->sa_command_0.w = 0;
44 sa->sa_command_0.bf.save_hash_state = save_h;
45 sa->sa_command_0.bf.save_iv = save_iv;
46 sa->sa_command_0.bf.load_hash_state = ld_h;
47 sa->sa_command_0.bf.load_iv = ld_iv;
48 sa->sa_command_0.bf.hdr_proc = hdr_proc;
49 sa->sa_command_0.bf.hash_alg = h;
50 sa->sa_command_0.bf.cipher_alg = c;
51 sa->sa_command_0.bf.pad_type = pad_type & 3;
52 sa->sa_command_0.bf.extend_pad = pad_type >> 2;
53 sa->sa_command_0.bf.op_group = op_grp;
54 sa->sa_command_0.bf.opcode = op;
55 sa->sa_command_0.bf.dir = dir;
56}
57
58static void set_dynamic_sa_command_1(struct dynamic_sa_ctl *sa, u32 cm,
59 u32 hmac_mc, u32 cfb, u32 esn,
60 u32 sn_mask, u32 mute, u32 cp_pad,
61 u32 cp_pay, u32 cp_hdr)
62{
63 sa->sa_command_1.w = 0;
64 sa->sa_command_1.bf.crypto_mode31 = (cm & 4) >> 2;
65 sa->sa_command_1.bf.crypto_mode9_8 = cm & 3;
66 sa->sa_command_1.bf.feedback_mode = cfb,
67 sa->sa_command_1.bf.sa_rev = 1;
68 sa->sa_command_1.bf.hmac_muting = hmac_mc;
69 sa->sa_command_1.bf.extended_seq_num = esn;
70 sa->sa_command_1.bf.seq_num_mask = sn_mask;
71 sa->sa_command_1.bf.mutable_bit_proc = mute;
72 sa->sa_command_1.bf.copy_pad = cp_pad;
73 sa->sa_command_1.bf.copy_payload = cp_pay;
74 sa->sa_command_1.bf.copy_hdr = cp_hdr;
75}
76
77int crypto4xx_encrypt(struct ablkcipher_request *req)
78{
79 struct crypto4xx_ctx *ctx = crypto_tfm_ctx(req->base.tfm);
80 unsigned int ivlen = crypto_ablkcipher_ivsize(
81 crypto_ablkcipher_reqtfm(req));
82 __le32 iv[ivlen];
83
84 if (ivlen)
85 crypto4xx_memcpy_to_le32(iv, req->info, ivlen);
86
87 return crypto4xx_build_pd(&req->base, ctx, req->src, req->dst,
88 req->nbytes, iv, ivlen, ctx->sa_out, ctx->sa_len, 0);
89}
90
91int crypto4xx_decrypt(struct ablkcipher_request *req)
92{
93 struct crypto4xx_ctx *ctx = crypto_tfm_ctx(req->base.tfm);
94 unsigned int ivlen = crypto_ablkcipher_ivsize(
95 crypto_ablkcipher_reqtfm(req));
96 __le32 iv[ivlen];
97
98 if (ivlen)
99 crypto4xx_memcpy_to_le32(iv, req->info, ivlen);
100
101 return crypto4xx_build_pd(&req->base, ctx, req->src, req->dst,
102 req->nbytes, iv, ivlen, ctx->sa_in, ctx->sa_len, 0);
103}
104
105/**
106 * AES Functions
107 */
108static int crypto4xx_setkey_aes(struct crypto_ablkcipher *cipher,
109 const u8 *key,
110 unsigned int keylen,
111 unsigned char cm,
112 u8 fb)
113{
114 struct crypto_tfm *tfm = crypto_ablkcipher_tfm(cipher);
115 struct crypto4xx_ctx *ctx = crypto_tfm_ctx(tfm);
116 struct dynamic_sa_ctl *sa;
117 int rc;
118
119 if (keylen != AES_KEYSIZE_256 &&
120 keylen != AES_KEYSIZE_192 && keylen != AES_KEYSIZE_128) {
121 crypto_ablkcipher_set_flags(cipher,
122 CRYPTO_TFM_RES_BAD_KEY_LEN);
123 return -EINVAL;
124 }
125
126 /* Create SA */
127 if (ctx->sa_in || ctx->sa_out)
128 crypto4xx_free_sa(ctx);
129
130 rc = crypto4xx_alloc_sa(ctx, SA_AES128_LEN + (keylen-16) / 4);
131 if (rc)
132 return rc;
133
134 /* Setup SA */
135 sa = ctx->sa_in;
136
137 set_dynamic_sa_command_0(sa, SA_NOT_SAVE_HASH, SA_NOT_SAVE_IV,
138 SA_LOAD_HASH_FROM_SA, SA_LOAD_IV_FROM_STATE,
139 SA_NO_HEADER_PROC, SA_HASH_ALG_NULL,
140 SA_CIPHER_ALG_AES, SA_PAD_TYPE_ZERO,
141 SA_OP_GROUP_BASIC, SA_OPCODE_DECRYPT,
142 DIR_INBOUND);
143
144 set_dynamic_sa_command_1(sa, cm, SA_HASH_MODE_HASH,
145 fb, SA_EXTENDED_SN_OFF,
146 SA_SEQ_MASK_OFF, SA_MC_ENABLE,
147 SA_NOT_COPY_PAD, SA_NOT_COPY_PAYLOAD,
148 SA_NOT_COPY_HDR);
149 crypto4xx_memcpy_to_le32(get_dynamic_sa_key_field(sa),
150 key, keylen);
151 sa->sa_contents.w = SA_AES_CONTENTS | (keylen << 2);
152 sa->sa_command_1.bf.key_len = keylen >> 3;
153
154 memcpy(ctx->sa_out, ctx->sa_in, ctx->sa_len * 4);
155 sa = ctx->sa_out;
156 sa->sa_command_0.bf.dir = DIR_OUTBOUND;
157
158 return 0;
159}
160
161int crypto4xx_setkey_aes_cbc(struct crypto_ablkcipher *cipher,
162 const u8 *key, unsigned int keylen)
163{
164 return crypto4xx_setkey_aes(cipher, key, keylen, CRYPTO_MODE_CBC,
165 CRYPTO_FEEDBACK_MODE_NO_FB);
166}
167
168int crypto4xx_setkey_aes_cfb(struct crypto_ablkcipher *cipher,
169 const u8 *key, unsigned int keylen)
170{
171 return crypto4xx_setkey_aes(cipher, key, keylen, CRYPTO_MODE_CFB,
172 CRYPTO_FEEDBACK_MODE_128BIT_CFB);
173}
174
175int crypto4xx_setkey_aes_ecb(struct crypto_ablkcipher *cipher,
176 const u8 *key, unsigned int keylen)
177{
178 return crypto4xx_setkey_aes(cipher, key, keylen, CRYPTO_MODE_ECB,
179 CRYPTO_FEEDBACK_MODE_NO_FB);
180}
181
182int crypto4xx_setkey_aes_ofb(struct crypto_ablkcipher *cipher,
183 const u8 *key, unsigned int keylen)
184{
185 return crypto4xx_setkey_aes(cipher, key, keylen, CRYPTO_MODE_OFB,
186 CRYPTO_FEEDBACK_MODE_64BIT_OFB);
187}
188
189int crypto4xx_setkey_rfc3686(struct crypto_ablkcipher *cipher,
190 const u8 *key, unsigned int keylen)
191{
192 struct crypto_tfm *tfm = crypto_ablkcipher_tfm(cipher);
193 struct crypto4xx_ctx *ctx = crypto_tfm_ctx(tfm);
194 int rc;
195
196 rc = crypto4xx_setkey_aes(cipher, key, keylen - CTR_RFC3686_NONCE_SIZE,
197 CRYPTO_MODE_CTR, CRYPTO_FEEDBACK_MODE_NO_FB);
198 if (rc)
199 return rc;
200
201 ctx->iv_nonce = cpu_to_le32p((u32 *)&key[keylen -
202 CTR_RFC3686_NONCE_SIZE]);
203
204 return 0;
205}
206
207int crypto4xx_rfc3686_encrypt(struct ablkcipher_request *req)
208{
209 struct crypto4xx_ctx *ctx = crypto_tfm_ctx(req->base.tfm);
210 __le32 iv[AES_IV_SIZE / 4] = {
211 ctx->iv_nonce,
212 cpu_to_le32p((u32 *) req->info),
213 cpu_to_le32p((u32 *) (req->info + 4)),
214 cpu_to_le32(1) };
215
216 return crypto4xx_build_pd(&req->base, ctx, req->src, req->dst,
217 req->nbytes, iv, AES_IV_SIZE,
218 ctx->sa_out, ctx->sa_len, 0);
219}
220
221int crypto4xx_rfc3686_decrypt(struct ablkcipher_request *req)
222{
223 struct crypto4xx_ctx *ctx = crypto_tfm_ctx(req->base.tfm);
224 __le32 iv[AES_IV_SIZE / 4] = {
225 ctx->iv_nonce,
226 cpu_to_le32p((u32 *) req->info),
227 cpu_to_le32p((u32 *) (req->info + 4)),
228 cpu_to_le32(1) };
229
230 return crypto4xx_build_pd(&req->base, ctx, req->src, req->dst,
231 req->nbytes, iv, AES_IV_SIZE,
232 ctx->sa_out, ctx->sa_len, 0);
233}
234
235static inline bool crypto4xx_aead_need_fallback(struct aead_request *req,
236 bool is_ccm, bool decrypt)
237{
238 struct crypto_aead *aead = crypto_aead_reqtfm(req);
239
240 /* authsize has to be a multiple of 4 */
241 if (aead->authsize & 3)
242 return true;
243
244 /*
245 * hardware does not handle cases where cryptlen
246 * is less than a block
247 */
248 if (req->cryptlen < AES_BLOCK_SIZE)
249 return true;
250
251 /* assoc len needs to be a multiple of 4 */
252 if (req->assoclen & 0x3)
253 return true;
254
255 /* CCM supports only counter field length of 2 and 4 bytes */
256 if (is_ccm && !(req->iv[0] == 1 || req->iv[0] == 3))
257 return true;
258
259 return false;
260}
261
262static int crypto4xx_aead_fallback(struct aead_request *req,
263 struct crypto4xx_ctx *ctx, bool do_decrypt)
264{
265 char aead_req_data[sizeof(struct aead_request) +
266 crypto_aead_reqsize(ctx->sw_cipher.aead)]
267 __aligned(__alignof__(struct aead_request));
268
269 struct aead_request *subreq = (void *) aead_req_data;
270
271 memset(subreq, 0, sizeof(aead_req_data));
272
273 aead_request_set_tfm(subreq, ctx->sw_cipher.aead);
274 aead_request_set_callback(subreq, req->base.flags,
275 req->base.complete, req->base.data);
276 aead_request_set_crypt(subreq, req->src, req->dst, req->cryptlen,
277 req->iv);
278 aead_request_set_ad(subreq, req->assoclen);
279 return do_decrypt ? crypto_aead_decrypt(subreq) :
280 crypto_aead_encrypt(subreq);
281}
282
283static int crypto4xx_setup_fallback(struct crypto4xx_ctx *ctx,
284 struct crypto_aead *cipher,
285 const u8 *key,
286 unsigned int keylen)
287{
288 int rc;
289
290 crypto_aead_clear_flags(ctx->sw_cipher.aead, CRYPTO_TFM_REQ_MASK);
291 crypto_aead_set_flags(ctx->sw_cipher.aead,
292 crypto_aead_get_flags(cipher) & CRYPTO_TFM_REQ_MASK);
293 rc = crypto_aead_setkey(ctx->sw_cipher.aead, key, keylen);
294 crypto_aead_clear_flags(cipher, CRYPTO_TFM_RES_MASK);
295 crypto_aead_set_flags(cipher,
296 crypto_aead_get_flags(ctx->sw_cipher.aead) &
297 CRYPTO_TFM_RES_MASK);
298
299 return rc;
300}
301
302/**
303 * AES-CCM Functions
304 */
305
306int crypto4xx_setkey_aes_ccm(struct crypto_aead *cipher, const u8 *key,
307 unsigned int keylen)
308{
309 struct crypto_tfm *tfm = crypto_aead_tfm(cipher);
310 struct crypto4xx_ctx *ctx = crypto_tfm_ctx(tfm);
311 struct dynamic_sa_ctl *sa;
312 int rc = 0;
313
314 rc = crypto4xx_setup_fallback(ctx, cipher, key, keylen);
315 if (rc)
316 return rc;
317
318 if (ctx->sa_in || ctx->sa_out)
319 crypto4xx_free_sa(ctx);
320
321 rc = crypto4xx_alloc_sa(ctx, SA_AES128_CCM_LEN + (keylen - 16) / 4);
322 if (rc)
323 return rc;
324
325 /* Setup SA */
326 sa = (struct dynamic_sa_ctl *) ctx->sa_in;
327 sa->sa_contents.w = SA_AES_CCM_CONTENTS | (keylen << 2);
328
329 set_dynamic_sa_command_0(sa, SA_SAVE_HASH, SA_NOT_SAVE_IV,
330 SA_LOAD_HASH_FROM_SA, SA_LOAD_IV_FROM_STATE,
331 SA_NO_HEADER_PROC, SA_HASH_ALG_CBC_MAC,
332 SA_CIPHER_ALG_AES,
333 SA_PAD_TYPE_ZERO, SA_OP_GROUP_BASIC,
334 SA_OPCODE_HASH_DECRYPT, DIR_INBOUND);
335
336 set_dynamic_sa_command_1(sa, CRYPTO_MODE_CTR, SA_HASH_MODE_HASH,
337 CRYPTO_FEEDBACK_MODE_NO_FB, SA_EXTENDED_SN_OFF,
338 SA_SEQ_MASK_OFF, SA_MC_ENABLE,
339 SA_NOT_COPY_PAD, SA_COPY_PAYLOAD,
340 SA_NOT_COPY_HDR);
341
342 sa->sa_command_1.bf.key_len = keylen >> 3;
343
344 crypto4xx_memcpy_to_le32(get_dynamic_sa_key_field(sa), key, keylen);
345
346 memcpy(ctx->sa_out, ctx->sa_in, ctx->sa_len * 4);
347 sa = (struct dynamic_sa_ctl *) ctx->sa_out;
348
349 set_dynamic_sa_command_0(sa, SA_SAVE_HASH, SA_NOT_SAVE_IV,
350 SA_LOAD_HASH_FROM_SA, SA_LOAD_IV_FROM_STATE,
351 SA_NO_HEADER_PROC, SA_HASH_ALG_CBC_MAC,
352 SA_CIPHER_ALG_AES,
353 SA_PAD_TYPE_ZERO, SA_OP_GROUP_BASIC,
354 SA_OPCODE_ENCRYPT_HASH, DIR_OUTBOUND);
355
356 set_dynamic_sa_command_1(sa, CRYPTO_MODE_CTR, SA_HASH_MODE_HASH,
357 CRYPTO_FEEDBACK_MODE_NO_FB, SA_EXTENDED_SN_OFF,
358 SA_SEQ_MASK_OFF, SA_MC_ENABLE,
359 SA_COPY_PAD, SA_COPY_PAYLOAD,
360 SA_NOT_COPY_HDR);
361
362 sa->sa_command_1.bf.key_len = keylen >> 3;
363 return 0;
364}
365
366static int crypto4xx_crypt_aes_ccm(struct aead_request *req, bool decrypt)
367{
368 struct crypto4xx_ctx *ctx = crypto_tfm_ctx(req->base.tfm);
369 struct crypto_aead *aead = crypto_aead_reqtfm(req);
370 unsigned int len = req->cryptlen;
371 __le32 iv[16];
372 u32 tmp_sa[ctx->sa_len * 4];
373 struct dynamic_sa_ctl *sa = (struct dynamic_sa_ctl *)tmp_sa;
374
375 if (crypto4xx_aead_need_fallback(req, true, decrypt))
376 return crypto4xx_aead_fallback(req, ctx, decrypt);
377
378 if (decrypt)
379 len -= crypto_aead_authsize(aead);
380
381 memcpy(tmp_sa, decrypt ? ctx->sa_in : ctx->sa_out, sizeof(tmp_sa));
382 sa->sa_command_0.bf.digest_len = crypto_aead_authsize(aead) >> 2;
383
384 if (req->iv[0] == 1) {
385 /* CRYPTO_MODE_AES_ICM */
386 sa->sa_command_1.bf.crypto_mode9_8 = 1;
387 }
388
389 iv[3] = cpu_to_le32(0);
390 crypto4xx_memcpy_to_le32(iv, req->iv, 16 - (req->iv[0] + 1));
391
392 return crypto4xx_build_pd(&req->base, ctx, req->src, req->dst,
393 len, iv, sizeof(iv),
394 sa, ctx->sa_len, req->assoclen);
395}
396
397int crypto4xx_encrypt_aes_ccm(struct aead_request *req)
398{
399 return crypto4xx_crypt_aes_ccm(req, false);
400}
401
402int crypto4xx_decrypt_aes_ccm(struct aead_request *req)
403{
404 return crypto4xx_crypt_aes_ccm(req, true);
405}
406
407int crypto4xx_setauthsize_aead(struct crypto_aead *cipher,
408 unsigned int authsize)
409{
410 struct crypto_tfm *tfm = crypto_aead_tfm(cipher);
411 struct crypto4xx_ctx *ctx = crypto_tfm_ctx(tfm);
412
413 return crypto_aead_setauthsize(ctx->sw_cipher.aead, authsize);
414}
415
416/**
417 * AES-GCM Functions
418 */
419
420static int crypto4xx_aes_gcm_validate_keylen(unsigned int keylen)
421{
422 switch (keylen) {
423 case 16:
424 case 24:
425 case 32:
426 return 0;
427 default:
428 return -EINVAL;
429 }
430}
431
432static int crypto4xx_compute_gcm_hash_key_sw(__le32 *hash_start, const u8 *key,
433 unsigned int keylen)
434{
435 struct crypto_cipher *aes_tfm = NULL;
436 uint8_t src[16] = { 0 };
437 int rc = 0;
438
439 aes_tfm = crypto_alloc_cipher("aes", 0, CRYPTO_ALG_ASYNC |
440 CRYPTO_ALG_NEED_FALLBACK);
441 if (IS_ERR(aes_tfm)) {
442 rc = PTR_ERR(aes_tfm);
443 pr_warn("could not load aes cipher driver: %d\n", rc);
444 return rc;
445 }
446
447 rc = crypto_cipher_setkey(aes_tfm, key, keylen);
448 if (rc) {
449 pr_err("setkey() failed: %d\n", rc);
450 goto out;
451 }
452
453 crypto_cipher_encrypt_one(aes_tfm, src, src);
454 crypto4xx_memcpy_to_le32(hash_start, src, 16);
455out:
456 crypto_free_cipher(aes_tfm);
457 return rc;
458}
459
460int crypto4xx_setkey_aes_gcm(struct crypto_aead *cipher,
461 const u8 *key, unsigned int keylen)
462{
463 struct crypto_tfm *tfm = crypto_aead_tfm(cipher);
464 struct crypto4xx_ctx *ctx = crypto_tfm_ctx(tfm);
465 struct dynamic_sa_ctl *sa;
466 int rc = 0;
467
468 if (crypto4xx_aes_gcm_validate_keylen(keylen) != 0) {
469 crypto_aead_set_flags(cipher, CRYPTO_TFM_RES_BAD_KEY_LEN);
470 return -EINVAL;
471 }
472
473 rc = crypto4xx_setup_fallback(ctx, cipher, key, keylen);
474 if (rc)
475 return rc;
476
477 if (ctx->sa_in || ctx->sa_out)
478 crypto4xx_free_sa(ctx);
479
480 rc = crypto4xx_alloc_sa(ctx, SA_AES128_GCM_LEN + (keylen - 16) / 4);
481 if (rc)
482 return rc;
483
484 sa = (struct dynamic_sa_ctl *) ctx->sa_in;
485
486 sa->sa_contents.w = SA_AES_GCM_CONTENTS | (keylen << 2);
487 set_dynamic_sa_command_0(sa, SA_SAVE_HASH, SA_NOT_SAVE_IV,
488 SA_LOAD_HASH_FROM_SA, SA_LOAD_IV_FROM_STATE,
489 SA_NO_HEADER_PROC, SA_HASH_ALG_GHASH,
490 SA_CIPHER_ALG_AES, SA_PAD_TYPE_ZERO,
491 SA_OP_GROUP_BASIC, SA_OPCODE_HASH_DECRYPT,
492 DIR_INBOUND);
493 set_dynamic_sa_command_1(sa, CRYPTO_MODE_CTR, SA_HASH_MODE_HASH,
494 CRYPTO_FEEDBACK_MODE_NO_FB, SA_EXTENDED_SN_OFF,
495 SA_SEQ_MASK_ON, SA_MC_DISABLE,
496 SA_NOT_COPY_PAD, SA_COPY_PAYLOAD,
497 SA_NOT_COPY_HDR);
498
499 sa->sa_command_1.bf.key_len = keylen >> 3;
500
501 crypto4xx_memcpy_to_le32(get_dynamic_sa_key_field(sa),
502 key, keylen);
503
504 rc = crypto4xx_compute_gcm_hash_key_sw(get_dynamic_sa_inner_digest(sa),
505 key, keylen);
506 if (rc) {
507 pr_err("GCM hash key setting failed = %d\n", rc);
508 goto err;
509 }
510
511 memcpy(ctx->sa_out, ctx->sa_in, ctx->sa_len * 4);
512 sa = (struct dynamic_sa_ctl *) ctx->sa_out;
513 sa->sa_command_0.bf.dir = DIR_OUTBOUND;
514 sa->sa_command_0.bf.opcode = SA_OPCODE_ENCRYPT_HASH;
515
516 return 0;
517err:
518 crypto4xx_free_sa(ctx);
519 return rc;
520}
521
522static inline int crypto4xx_crypt_aes_gcm(struct aead_request *req,
523 bool decrypt)
524{
525 struct crypto4xx_ctx *ctx = crypto_tfm_ctx(req->base.tfm);
526 unsigned int len = req->cryptlen;
527 __le32 iv[4];
528
529 if (crypto4xx_aead_need_fallback(req, false, decrypt))
530 return crypto4xx_aead_fallback(req, ctx, decrypt);
531
532 crypto4xx_memcpy_to_le32(iv, req->iv, GCM_AES_IV_SIZE);
533 iv[3] = cpu_to_le32(1);
534
535 if (decrypt)
536 len -= crypto_aead_authsize(crypto_aead_reqtfm(req));
537
538 return crypto4xx_build_pd(&req->base, ctx, req->src, req->dst,
539 len, iv, sizeof(iv),
540 decrypt ? ctx->sa_in : ctx->sa_out,
541 ctx->sa_len, req->assoclen);
542}
543
544int crypto4xx_encrypt_aes_gcm(struct aead_request *req)
545{
546 return crypto4xx_crypt_aes_gcm(req, false);
547}
548
549int crypto4xx_decrypt_aes_gcm(struct aead_request *req)
550{
551 return crypto4xx_crypt_aes_gcm(req, true);
552}
553
554/**
555 * HASH SHA1 Functions
556 */
557static int crypto4xx_hash_alg_init(struct crypto_tfm *tfm,
558 unsigned int sa_len,
559 unsigned char ha,
560 unsigned char hm)
561{
562 struct crypto_alg *alg = tfm->__crt_alg;
563 struct crypto4xx_alg *my_alg;
564 struct crypto4xx_ctx *ctx = crypto_tfm_ctx(tfm);
565 struct dynamic_sa_hash160 *sa;
566 int rc;
567
568 my_alg = container_of(__crypto_ahash_alg(alg), struct crypto4xx_alg,
569 alg.u.hash);
570 ctx->dev = my_alg->dev;
571
572 /* Create SA */
573 if (ctx->sa_in || ctx->sa_out)
574 crypto4xx_free_sa(ctx);
575
576 rc = crypto4xx_alloc_sa(ctx, sa_len);
577 if (rc)
578 return rc;
579
580 crypto_ahash_set_reqsize(__crypto_ahash_cast(tfm),
581 sizeof(struct crypto4xx_ctx));
582 sa = (struct dynamic_sa_hash160 *)ctx->sa_in;
583 set_dynamic_sa_command_0(&sa->ctrl, SA_SAVE_HASH, SA_NOT_SAVE_IV,
584 SA_NOT_LOAD_HASH, SA_LOAD_IV_FROM_SA,
585 SA_NO_HEADER_PROC, ha, SA_CIPHER_ALG_NULL,
586 SA_PAD_TYPE_ZERO, SA_OP_GROUP_BASIC,
587 SA_OPCODE_HASH, DIR_INBOUND);
588 set_dynamic_sa_command_1(&sa->ctrl, 0, SA_HASH_MODE_HASH,
589 CRYPTO_FEEDBACK_MODE_NO_FB, SA_EXTENDED_SN_OFF,
590 SA_SEQ_MASK_OFF, SA_MC_ENABLE,
591 SA_NOT_COPY_PAD, SA_NOT_COPY_PAYLOAD,
592 SA_NOT_COPY_HDR);
593 /* Need to zero hash digest in SA */
594 memset(sa->inner_digest, 0, sizeof(sa->inner_digest));
595 memset(sa->outer_digest, 0, sizeof(sa->outer_digest));
596
597 return 0;
598}
599
600int crypto4xx_hash_init(struct ahash_request *req)
601{
602 struct crypto4xx_ctx *ctx = crypto_tfm_ctx(req->base.tfm);
603 int ds;
604 struct dynamic_sa_ctl *sa;
605
606 sa = ctx->sa_in;
607 ds = crypto_ahash_digestsize(
608 __crypto_ahash_cast(req->base.tfm));
609 sa->sa_command_0.bf.digest_len = ds >> 2;
610 sa->sa_command_0.bf.load_hash_state = SA_LOAD_HASH_FROM_SA;
611
612 return 0;
613}
614
615int crypto4xx_hash_update(struct ahash_request *req)
616{
617 struct crypto_ahash *ahash = crypto_ahash_reqtfm(req);
618 struct crypto4xx_ctx *ctx = crypto_tfm_ctx(req->base.tfm);
619 struct scatterlist dst;
620 unsigned int ds = crypto_ahash_digestsize(ahash);
621
622 sg_init_one(&dst, req->result, ds);
623
624 return crypto4xx_build_pd(&req->base, ctx, req->src, &dst,
625 req->nbytes, NULL, 0, ctx->sa_in,
626 ctx->sa_len, 0);
627}
628
629int crypto4xx_hash_final(struct ahash_request *req)
630{
631 return 0;
632}
633
634int crypto4xx_hash_digest(struct ahash_request *req)
635{
636 struct crypto_ahash *ahash = crypto_ahash_reqtfm(req);
637 struct crypto4xx_ctx *ctx = crypto_tfm_ctx(req->base.tfm);
638 struct scatterlist dst;
639 unsigned int ds = crypto_ahash_digestsize(ahash);
640
641 sg_init_one(&dst, req->result, ds);
642
643 return crypto4xx_build_pd(&req->base, ctx, req->src, &dst,
644 req->nbytes, NULL, 0, ctx->sa_in,
645 ctx->sa_len, 0);
646}
647
648/**
649 * SHA1 Algorithm
650 */
651int crypto4xx_sha1_alg_init(struct crypto_tfm *tfm)
652{
653 return crypto4xx_hash_alg_init(tfm, SA_HASH160_LEN, SA_HASH_ALG_SHA1,
654 SA_HASH_MODE_HASH);
655}