Loading...
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/sha.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_cfb(struct crypto_skcipher *cipher,
185 const u8 *key, unsigned int keylen)
186{
187 return crypto4xx_setkey_aes(cipher, key, keylen, CRYPTO_MODE_CFB,
188 CRYPTO_FEEDBACK_MODE_128BIT_CFB);
189}
190
191int crypto4xx_setkey_aes_ecb(struct crypto_skcipher *cipher,
192 const u8 *key, unsigned int keylen)
193{
194 return crypto4xx_setkey_aes(cipher, key, keylen, CRYPTO_MODE_ECB,
195 CRYPTO_FEEDBACK_MODE_NO_FB);
196}
197
198int crypto4xx_setkey_aes_ofb(struct crypto_skcipher *cipher,
199 const u8 *key, unsigned int keylen)
200{
201 return crypto4xx_setkey_aes(cipher, key, keylen, CRYPTO_MODE_OFB,
202 CRYPTO_FEEDBACK_MODE_64BIT_OFB);
203}
204
205int crypto4xx_setkey_rfc3686(struct crypto_skcipher *cipher,
206 const u8 *key, unsigned int keylen)
207{
208 struct crypto4xx_ctx *ctx = crypto_skcipher_ctx(cipher);
209 int rc;
210
211 rc = crypto4xx_setkey_aes(cipher, key, keylen - CTR_RFC3686_NONCE_SIZE,
212 CRYPTO_MODE_CTR, CRYPTO_FEEDBACK_MODE_NO_FB);
213 if (rc)
214 return rc;
215
216 ctx->iv_nonce = cpu_to_le32p((u32 *)&key[keylen -
217 CTR_RFC3686_NONCE_SIZE]);
218
219 return 0;
220}
221
222int crypto4xx_rfc3686_encrypt(struct skcipher_request *req)
223{
224 struct crypto_skcipher *cipher = crypto_skcipher_reqtfm(req);
225 struct crypto4xx_ctx *ctx = crypto_skcipher_ctx(cipher);
226 __le32 iv[AES_IV_SIZE / 4] = {
227 ctx->iv_nonce,
228 cpu_to_le32p((u32 *) req->iv),
229 cpu_to_le32p((u32 *) (req->iv + 4)),
230 cpu_to_le32(1) };
231
232 return crypto4xx_build_pd(&req->base, ctx, req->src, req->dst,
233 req->cryptlen, iv, AES_IV_SIZE,
234 ctx->sa_out, ctx->sa_len, 0, NULL);
235}
236
237int crypto4xx_rfc3686_decrypt(struct skcipher_request *req)
238{
239 struct crypto_skcipher *cipher = crypto_skcipher_reqtfm(req);
240 struct crypto4xx_ctx *ctx = crypto_skcipher_ctx(cipher);
241 __le32 iv[AES_IV_SIZE / 4] = {
242 ctx->iv_nonce,
243 cpu_to_le32p((u32 *) req->iv),
244 cpu_to_le32p((u32 *) (req->iv + 4)),
245 cpu_to_le32(1) };
246
247 return crypto4xx_build_pd(&req->base, ctx, req->src, req->dst,
248 req->cryptlen, iv, AES_IV_SIZE,
249 ctx->sa_out, ctx->sa_len, 0, NULL);
250}
251
252static int
253crypto4xx_ctr_crypt(struct skcipher_request *req, bool encrypt)
254{
255 struct crypto_skcipher *cipher = crypto_skcipher_reqtfm(req);
256 struct crypto4xx_ctx *ctx = crypto_skcipher_ctx(cipher);
257 size_t iv_len = crypto_skcipher_ivsize(cipher);
258 unsigned int counter = be32_to_cpup((__be32 *)(req->iv + iv_len - 4));
259 unsigned int nblks = ALIGN(req->cryptlen, AES_BLOCK_SIZE) /
260 AES_BLOCK_SIZE;
261
262 /*
263 * The hardware uses only the last 32-bits as the counter while the
264 * kernel tests (aes_ctr_enc_tv_template[4] for example) expect that
265 * the whole IV is a counter. So fallback if the counter is going to
266 * overlow.
267 */
268 if (counter + nblks < counter) {
269 SYNC_SKCIPHER_REQUEST_ON_STACK(subreq, ctx->sw_cipher.cipher);
270 int ret;
271
272 skcipher_request_set_sync_tfm(subreq, ctx->sw_cipher.cipher);
273 skcipher_request_set_callback(subreq, req->base.flags,
274 NULL, NULL);
275 skcipher_request_set_crypt(subreq, req->src, req->dst,
276 req->cryptlen, req->iv);
277 ret = encrypt ? crypto_skcipher_encrypt(subreq)
278 : crypto_skcipher_decrypt(subreq);
279 skcipher_request_zero(subreq);
280 return ret;
281 }
282
283 return encrypt ? crypto4xx_encrypt_iv_stream(req)
284 : crypto4xx_decrypt_iv_stream(req);
285}
286
287static int crypto4xx_sk_setup_fallback(struct crypto4xx_ctx *ctx,
288 struct crypto_skcipher *cipher,
289 const u8 *key,
290 unsigned int keylen)
291{
292 crypto_sync_skcipher_clear_flags(ctx->sw_cipher.cipher,
293 CRYPTO_TFM_REQ_MASK);
294 crypto_sync_skcipher_set_flags(ctx->sw_cipher.cipher,
295 crypto_skcipher_get_flags(cipher) & CRYPTO_TFM_REQ_MASK);
296 return crypto_sync_skcipher_setkey(ctx->sw_cipher.cipher, key, keylen);
297}
298
299int crypto4xx_setkey_aes_ctr(struct crypto_skcipher *cipher,
300 const u8 *key, unsigned int keylen)
301{
302 struct crypto4xx_ctx *ctx = crypto_skcipher_ctx(cipher);
303 int rc;
304
305 rc = crypto4xx_sk_setup_fallback(ctx, cipher, key, keylen);
306 if (rc)
307 return rc;
308
309 return crypto4xx_setkey_aes(cipher, key, keylen,
310 CRYPTO_MODE_CTR, CRYPTO_FEEDBACK_MODE_NO_FB);
311}
312
313int crypto4xx_encrypt_ctr(struct skcipher_request *req)
314{
315 return crypto4xx_ctr_crypt(req, true);
316}
317
318int crypto4xx_decrypt_ctr(struct skcipher_request *req)
319{
320 return crypto4xx_ctr_crypt(req, false);
321}
322
323static inline bool crypto4xx_aead_need_fallback(struct aead_request *req,
324 unsigned int len,
325 bool is_ccm, bool decrypt)
326{
327 struct crypto_aead *aead = crypto_aead_reqtfm(req);
328
329 /* authsize has to be a multiple of 4 */
330 if (aead->authsize & 3)
331 return true;
332
333 /*
334 * hardware does not handle cases where plaintext
335 * is less than a block.
336 */
337 if (len < AES_BLOCK_SIZE)
338 return true;
339
340 /* assoc len needs to be a multiple of 4 and <= 1020 */
341 if (req->assoclen & 0x3 || req->assoclen > 1020)
342 return true;
343
344 /* CCM supports only counter field length of 2 and 4 bytes */
345 if (is_ccm && !(req->iv[0] == 1 || req->iv[0] == 3))
346 return true;
347
348 return false;
349}
350
351static int crypto4xx_aead_fallback(struct aead_request *req,
352 struct crypto4xx_ctx *ctx, bool do_decrypt)
353{
354 struct aead_request *subreq = aead_request_ctx(req);
355
356 aead_request_set_tfm(subreq, ctx->sw_cipher.aead);
357 aead_request_set_callback(subreq, req->base.flags,
358 req->base.complete, req->base.data);
359 aead_request_set_crypt(subreq, req->src, req->dst, req->cryptlen,
360 req->iv);
361 aead_request_set_ad(subreq, req->assoclen);
362 return do_decrypt ? crypto_aead_decrypt(subreq) :
363 crypto_aead_encrypt(subreq);
364}
365
366static int crypto4xx_aead_setup_fallback(struct crypto4xx_ctx *ctx,
367 struct crypto_aead *cipher,
368 const u8 *key,
369 unsigned int keylen)
370{
371 crypto_aead_clear_flags(ctx->sw_cipher.aead, CRYPTO_TFM_REQ_MASK);
372 crypto_aead_set_flags(ctx->sw_cipher.aead,
373 crypto_aead_get_flags(cipher) & CRYPTO_TFM_REQ_MASK);
374 return crypto_aead_setkey(ctx->sw_cipher.aead, key, keylen);
375}
376
377/**
378 * AES-CCM Functions
379 */
380
381int crypto4xx_setkey_aes_ccm(struct crypto_aead *cipher, const u8 *key,
382 unsigned int keylen)
383{
384 struct crypto_tfm *tfm = crypto_aead_tfm(cipher);
385 struct crypto4xx_ctx *ctx = crypto_tfm_ctx(tfm);
386 struct dynamic_sa_ctl *sa;
387 int rc = 0;
388
389 rc = crypto4xx_aead_setup_fallback(ctx, cipher, key, keylen);
390 if (rc)
391 return rc;
392
393 if (ctx->sa_in || ctx->sa_out)
394 crypto4xx_free_sa(ctx);
395
396 rc = crypto4xx_alloc_sa(ctx, SA_AES128_CCM_LEN + (keylen - 16) / 4);
397 if (rc)
398 return rc;
399
400 /* Setup SA */
401 sa = (struct dynamic_sa_ctl *) ctx->sa_in;
402 sa->sa_contents.w = SA_AES_CCM_CONTENTS | (keylen << 2);
403
404 set_dynamic_sa_command_0(sa, SA_SAVE_HASH, SA_NOT_SAVE_IV,
405 SA_LOAD_HASH_FROM_SA, SA_LOAD_IV_FROM_STATE,
406 SA_NO_HEADER_PROC, SA_HASH_ALG_CBC_MAC,
407 SA_CIPHER_ALG_AES,
408 SA_PAD_TYPE_ZERO, SA_OP_GROUP_BASIC,
409 SA_OPCODE_HASH_DECRYPT, DIR_INBOUND);
410
411 set_dynamic_sa_command_1(sa, CRYPTO_MODE_CTR, SA_HASH_MODE_HASH,
412 CRYPTO_FEEDBACK_MODE_NO_FB, SA_EXTENDED_SN_OFF,
413 SA_SEQ_MASK_OFF, SA_MC_ENABLE,
414 SA_NOT_COPY_PAD, SA_COPY_PAYLOAD,
415 SA_NOT_COPY_HDR);
416
417 sa->sa_command_1.bf.key_len = keylen >> 3;
418
419 crypto4xx_memcpy_to_le32(get_dynamic_sa_key_field(sa), key, keylen);
420
421 memcpy(ctx->sa_out, ctx->sa_in, ctx->sa_len * 4);
422 sa = (struct dynamic_sa_ctl *) ctx->sa_out;
423
424 set_dynamic_sa_command_0(sa, SA_SAVE_HASH, SA_NOT_SAVE_IV,
425 SA_LOAD_HASH_FROM_SA, SA_LOAD_IV_FROM_STATE,
426 SA_NO_HEADER_PROC, SA_HASH_ALG_CBC_MAC,
427 SA_CIPHER_ALG_AES,
428 SA_PAD_TYPE_ZERO, SA_OP_GROUP_BASIC,
429 SA_OPCODE_ENCRYPT_HASH, DIR_OUTBOUND);
430
431 set_dynamic_sa_command_1(sa, CRYPTO_MODE_CTR, SA_HASH_MODE_HASH,
432 CRYPTO_FEEDBACK_MODE_NO_FB, SA_EXTENDED_SN_OFF,
433 SA_SEQ_MASK_OFF, SA_MC_ENABLE,
434 SA_COPY_PAD, SA_COPY_PAYLOAD,
435 SA_NOT_COPY_HDR);
436
437 sa->sa_command_1.bf.key_len = keylen >> 3;
438 return 0;
439}
440
441static int crypto4xx_crypt_aes_ccm(struct aead_request *req, bool decrypt)
442{
443 struct crypto4xx_ctx *ctx = crypto_tfm_ctx(req->base.tfm);
444 struct crypto4xx_aead_reqctx *rctx = aead_request_ctx(req);
445 struct crypto_aead *aead = crypto_aead_reqtfm(req);
446 __le32 iv[16];
447 u32 tmp_sa[SA_AES128_CCM_LEN + 4];
448 struct dynamic_sa_ctl *sa = (struct dynamic_sa_ctl *)tmp_sa;
449 unsigned int len = req->cryptlen;
450
451 if (decrypt)
452 len -= crypto_aead_authsize(aead);
453
454 if (crypto4xx_aead_need_fallback(req, len, true, decrypt))
455 return crypto4xx_aead_fallback(req, ctx, decrypt);
456
457 memcpy(tmp_sa, decrypt ? ctx->sa_in : ctx->sa_out, ctx->sa_len * 4);
458 sa->sa_command_0.bf.digest_len = crypto_aead_authsize(aead) >> 2;
459
460 if (req->iv[0] == 1) {
461 /* CRYPTO_MODE_AES_ICM */
462 sa->sa_command_1.bf.crypto_mode9_8 = 1;
463 }
464
465 iv[3] = cpu_to_le32(0);
466 crypto4xx_memcpy_to_le32(iv, req->iv, 16 - (req->iv[0] + 1));
467
468 return crypto4xx_build_pd(&req->base, ctx, req->src, req->dst,
469 len, iv, sizeof(iv),
470 sa, ctx->sa_len, req->assoclen, rctx->dst);
471}
472
473int crypto4xx_encrypt_aes_ccm(struct aead_request *req)
474{
475 return crypto4xx_crypt_aes_ccm(req, false);
476}
477
478int crypto4xx_decrypt_aes_ccm(struct aead_request *req)
479{
480 return crypto4xx_crypt_aes_ccm(req, true);
481}
482
483int crypto4xx_setauthsize_aead(struct crypto_aead *cipher,
484 unsigned int authsize)
485{
486 struct crypto_tfm *tfm = crypto_aead_tfm(cipher);
487 struct crypto4xx_ctx *ctx = crypto_tfm_ctx(tfm);
488
489 return crypto_aead_setauthsize(ctx->sw_cipher.aead, authsize);
490}
491
492/**
493 * AES-GCM Functions
494 */
495
496static int crypto4xx_aes_gcm_validate_keylen(unsigned int keylen)
497{
498 switch (keylen) {
499 case 16:
500 case 24:
501 case 32:
502 return 0;
503 default:
504 return -EINVAL;
505 }
506}
507
508static int crypto4xx_compute_gcm_hash_key_sw(__le32 *hash_start, const u8 *key,
509 unsigned int keylen)
510{
511 struct crypto_aes_ctx ctx;
512 uint8_t src[16] = { 0 };
513 int rc;
514
515 rc = aes_expandkey(&ctx, key, keylen);
516 if (rc) {
517 pr_err("aes_expandkey() failed: %d\n", rc);
518 return rc;
519 }
520
521 aes_encrypt(&ctx, src, src);
522 crypto4xx_memcpy_to_le32(hash_start, src, 16);
523 memzero_explicit(&ctx, sizeof(ctx));
524 return 0;
525}
526
527int crypto4xx_setkey_aes_gcm(struct crypto_aead *cipher,
528 const u8 *key, unsigned int keylen)
529{
530 struct crypto_tfm *tfm = crypto_aead_tfm(cipher);
531 struct crypto4xx_ctx *ctx = crypto_tfm_ctx(tfm);
532 struct dynamic_sa_ctl *sa;
533 int rc = 0;
534
535 if (crypto4xx_aes_gcm_validate_keylen(keylen) != 0)
536 return -EINVAL;
537
538 rc = crypto4xx_aead_setup_fallback(ctx, cipher, key, keylen);
539 if (rc)
540 return rc;
541
542 if (ctx->sa_in || ctx->sa_out)
543 crypto4xx_free_sa(ctx);
544
545 rc = crypto4xx_alloc_sa(ctx, SA_AES128_GCM_LEN + (keylen - 16) / 4);
546 if (rc)
547 return rc;
548
549 sa = (struct dynamic_sa_ctl *) ctx->sa_in;
550
551 sa->sa_contents.w = SA_AES_GCM_CONTENTS | (keylen << 2);
552 set_dynamic_sa_command_0(sa, SA_SAVE_HASH, SA_NOT_SAVE_IV,
553 SA_LOAD_HASH_FROM_SA, SA_LOAD_IV_FROM_STATE,
554 SA_NO_HEADER_PROC, SA_HASH_ALG_GHASH,
555 SA_CIPHER_ALG_AES, SA_PAD_TYPE_ZERO,
556 SA_OP_GROUP_BASIC, SA_OPCODE_HASH_DECRYPT,
557 DIR_INBOUND);
558 set_dynamic_sa_command_1(sa, CRYPTO_MODE_CTR, SA_HASH_MODE_HASH,
559 CRYPTO_FEEDBACK_MODE_NO_FB, SA_EXTENDED_SN_OFF,
560 SA_SEQ_MASK_ON, SA_MC_DISABLE,
561 SA_NOT_COPY_PAD, SA_COPY_PAYLOAD,
562 SA_NOT_COPY_HDR);
563
564 sa->sa_command_1.bf.key_len = keylen >> 3;
565
566 crypto4xx_memcpy_to_le32(get_dynamic_sa_key_field(sa),
567 key, keylen);
568
569 rc = crypto4xx_compute_gcm_hash_key_sw(get_dynamic_sa_inner_digest(sa),
570 key, keylen);
571 if (rc) {
572 pr_err("GCM hash key setting failed = %d\n", rc);
573 goto err;
574 }
575
576 memcpy(ctx->sa_out, ctx->sa_in, ctx->sa_len * 4);
577 sa = (struct dynamic_sa_ctl *) ctx->sa_out;
578 sa->sa_command_0.bf.dir = DIR_OUTBOUND;
579 sa->sa_command_0.bf.opcode = SA_OPCODE_ENCRYPT_HASH;
580
581 return 0;
582err:
583 crypto4xx_free_sa(ctx);
584 return rc;
585}
586
587static inline int crypto4xx_crypt_aes_gcm(struct aead_request *req,
588 bool decrypt)
589{
590 struct crypto4xx_ctx *ctx = crypto_tfm_ctx(req->base.tfm);
591 struct crypto4xx_aead_reqctx *rctx = aead_request_ctx(req);
592 __le32 iv[4];
593 unsigned int len = req->cryptlen;
594
595 if (decrypt)
596 len -= crypto_aead_authsize(crypto_aead_reqtfm(req));
597
598 if (crypto4xx_aead_need_fallback(req, len, false, decrypt))
599 return crypto4xx_aead_fallback(req, ctx, decrypt);
600
601 crypto4xx_memcpy_to_le32(iv, req->iv, GCM_AES_IV_SIZE);
602 iv[3] = cpu_to_le32(1);
603
604 return crypto4xx_build_pd(&req->base, ctx, req->src, req->dst,
605 len, iv, sizeof(iv),
606 decrypt ? ctx->sa_in : ctx->sa_out,
607 ctx->sa_len, req->assoclen, rctx->dst);
608}
609
610int crypto4xx_encrypt_aes_gcm(struct aead_request *req)
611{
612 return crypto4xx_crypt_aes_gcm(req, false);
613}
614
615int crypto4xx_decrypt_aes_gcm(struct aead_request *req)
616{
617 return crypto4xx_crypt_aes_gcm(req, true);
618}
619
620/**
621 * HASH SHA1 Functions
622 */
623static int crypto4xx_hash_alg_init(struct crypto_tfm *tfm,
624 unsigned int sa_len,
625 unsigned char ha,
626 unsigned char hm)
627{
628 struct crypto_alg *alg = tfm->__crt_alg;
629 struct crypto4xx_alg *my_alg;
630 struct crypto4xx_ctx *ctx = crypto_tfm_ctx(tfm);
631 struct dynamic_sa_hash160 *sa;
632 int rc;
633
634 my_alg = container_of(__crypto_ahash_alg(alg), struct crypto4xx_alg,
635 alg.u.hash);
636 ctx->dev = my_alg->dev;
637
638 /* Create SA */
639 if (ctx->sa_in || ctx->sa_out)
640 crypto4xx_free_sa(ctx);
641
642 rc = crypto4xx_alloc_sa(ctx, sa_len);
643 if (rc)
644 return rc;
645
646 crypto_ahash_set_reqsize(__crypto_ahash_cast(tfm),
647 sizeof(struct crypto4xx_ctx));
648 sa = (struct dynamic_sa_hash160 *)ctx->sa_in;
649 set_dynamic_sa_command_0(&sa->ctrl, SA_SAVE_HASH, SA_NOT_SAVE_IV,
650 SA_NOT_LOAD_HASH, SA_LOAD_IV_FROM_SA,
651 SA_NO_HEADER_PROC, ha, SA_CIPHER_ALG_NULL,
652 SA_PAD_TYPE_ZERO, SA_OP_GROUP_BASIC,
653 SA_OPCODE_HASH, DIR_INBOUND);
654 set_dynamic_sa_command_1(&sa->ctrl, 0, SA_HASH_MODE_HASH,
655 CRYPTO_FEEDBACK_MODE_NO_FB, SA_EXTENDED_SN_OFF,
656 SA_SEQ_MASK_OFF, SA_MC_ENABLE,
657 SA_NOT_COPY_PAD, SA_NOT_COPY_PAYLOAD,
658 SA_NOT_COPY_HDR);
659 /* Need to zero hash digest in SA */
660 memset(sa->inner_digest, 0, sizeof(sa->inner_digest));
661 memset(sa->outer_digest, 0, sizeof(sa->outer_digest));
662
663 return 0;
664}
665
666int crypto4xx_hash_init(struct ahash_request *req)
667{
668 struct crypto4xx_ctx *ctx = crypto_tfm_ctx(req->base.tfm);
669 int ds;
670 struct dynamic_sa_ctl *sa;
671
672 sa = ctx->sa_in;
673 ds = crypto_ahash_digestsize(
674 __crypto_ahash_cast(req->base.tfm));
675 sa->sa_command_0.bf.digest_len = ds >> 2;
676 sa->sa_command_0.bf.load_hash_state = SA_LOAD_HASH_FROM_SA;
677
678 return 0;
679}
680
681int crypto4xx_hash_update(struct ahash_request *req)
682{
683 struct crypto_ahash *ahash = crypto_ahash_reqtfm(req);
684 struct crypto4xx_ctx *ctx = crypto_tfm_ctx(req->base.tfm);
685 struct scatterlist dst;
686 unsigned int ds = crypto_ahash_digestsize(ahash);
687
688 sg_init_one(&dst, req->result, ds);
689
690 return crypto4xx_build_pd(&req->base, ctx, req->src, &dst,
691 req->nbytes, NULL, 0, ctx->sa_in,
692 ctx->sa_len, 0, NULL);
693}
694
695int crypto4xx_hash_final(struct ahash_request *req)
696{
697 return 0;
698}
699
700int crypto4xx_hash_digest(struct ahash_request *req)
701{
702 struct crypto_ahash *ahash = crypto_ahash_reqtfm(req);
703 struct crypto4xx_ctx *ctx = crypto_tfm_ctx(req->base.tfm);
704 struct scatterlist dst;
705 unsigned int ds = crypto_ahash_digestsize(ahash);
706
707 sg_init_one(&dst, req->result, ds);
708
709 return crypto4xx_build_pd(&req->base, ctx, req->src, &dst,
710 req->nbytes, NULL, 0, ctx->sa_in,
711 ctx->sa_len, 0, NULL);
712}
713
714/**
715 * SHA1 Algorithm
716 */
717int crypto4xx_sha1_alg_init(struct crypto_tfm *tfm)
718{
719 return crypto4xx_hash_alg_init(tfm, SA_HASH160_LEN, SA_HASH_ALG_SHA1,
720 SA_HASH_MODE_HASH);
721}
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/aes.h>
30#include <crypto/sha.h>
31#include "crypto4xx_reg_def.h"
32#include "crypto4xx_sa.h"
33#include "crypto4xx_core.h"
34
35static void set_dynamic_sa_command_0(struct dynamic_sa_ctl *sa, u32 save_h,
36 u32 save_iv, u32 ld_h, u32 ld_iv,
37 u32 hdr_proc, u32 h, u32 c, u32 pad_type,
38 u32 op_grp, u32 op, u32 dir)
39{
40 sa->sa_command_0.w = 0;
41 sa->sa_command_0.bf.save_hash_state = save_h;
42 sa->sa_command_0.bf.save_iv = save_iv;
43 sa->sa_command_0.bf.load_hash_state = ld_h;
44 sa->sa_command_0.bf.load_iv = ld_iv;
45 sa->sa_command_0.bf.hdr_proc = hdr_proc;
46 sa->sa_command_0.bf.hash_alg = h;
47 sa->sa_command_0.bf.cipher_alg = c;
48 sa->sa_command_0.bf.pad_type = pad_type & 3;
49 sa->sa_command_0.bf.extend_pad = pad_type >> 2;
50 sa->sa_command_0.bf.op_group = op_grp;
51 sa->sa_command_0.bf.opcode = op;
52 sa->sa_command_0.bf.dir = dir;
53}
54
55static void set_dynamic_sa_command_1(struct dynamic_sa_ctl *sa, u32 cm,
56 u32 hmac_mc, u32 cfb, u32 esn,
57 u32 sn_mask, u32 mute, u32 cp_pad,
58 u32 cp_pay, u32 cp_hdr)
59{
60 sa->sa_command_1.w = 0;
61 sa->sa_command_1.bf.crypto_mode31 = (cm & 4) >> 2;
62 sa->sa_command_1.bf.crypto_mode9_8 = cm & 3;
63 sa->sa_command_1.bf.feedback_mode = cfb,
64 sa->sa_command_1.bf.sa_rev = 1;
65 sa->sa_command_1.bf.extended_seq_num = esn;
66 sa->sa_command_1.bf.seq_num_mask = sn_mask;
67 sa->sa_command_1.bf.mutable_bit_proc = mute;
68 sa->sa_command_1.bf.copy_pad = cp_pad;
69 sa->sa_command_1.bf.copy_payload = cp_pay;
70 sa->sa_command_1.bf.copy_hdr = cp_hdr;
71}
72
73int crypto4xx_encrypt(struct ablkcipher_request *req)
74{
75 struct crypto4xx_ctx *ctx = crypto_tfm_ctx(req->base.tfm);
76
77 ctx->direction = DIR_OUTBOUND;
78 ctx->hash_final = 0;
79 ctx->is_hash = 0;
80 ctx->pd_ctl = 0x1;
81
82 return crypto4xx_build_pd(&req->base, ctx, req->src, req->dst,
83 req->nbytes, req->info,
84 get_dynamic_sa_iv_size(ctx));
85}
86
87int crypto4xx_decrypt(struct ablkcipher_request *req)
88{
89 struct crypto4xx_ctx *ctx = crypto_tfm_ctx(req->base.tfm);
90
91 ctx->direction = DIR_INBOUND;
92 ctx->hash_final = 0;
93 ctx->is_hash = 0;
94 ctx->pd_ctl = 1;
95
96 return crypto4xx_build_pd(&req->base, ctx, req->src, req->dst,
97 req->nbytes, req->info,
98 get_dynamic_sa_iv_size(ctx));
99}
100
101/**
102 * AES Functions
103 */
104static int crypto4xx_setkey_aes(struct crypto_ablkcipher *cipher,
105 const u8 *key,
106 unsigned int keylen,
107 unsigned char cm,
108 u8 fb)
109{
110 struct crypto_tfm *tfm = crypto_ablkcipher_tfm(cipher);
111 struct crypto4xx_ctx *ctx = crypto_tfm_ctx(tfm);
112 struct dynamic_sa_ctl *sa;
113 int rc;
114
115 if (keylen != AES_KEYSIZE_256 &&
116 keylen != AES_KEYSIZE_192 && keylen != AES_KEYSIZE_128) {
117 crypto_ablkcipher_set_flags(cipher,
118 CRYPTO_TFM_RES_BAD_KEY_LEN);
119 return -EINVAL;
120 }
121
122 /* Create SA */
123 if (ctx->sa_in_dma_addr || ctx->sa_out_dma_addr)
124 crypto4xx_free_sa(ctx);
125
126 rc = crypto4xx_alloc_sa(ctx, SA_AES128_LEN + (keylen-16) / 4);
127 if (rc)
128 return rc;
129
130 if (ctx->state_record_dma_addr == 0) {
131 rc = crypto4xx_alloc_state_record(ctx);
132 if (rc) {
133 crypto4xx_free_sa(ctx);
134 return rc;
135 }
136 }
137 /* Setup SA */
138 sa = (struct dynamic_sa_ctl *) ctx->sa_in;
139 ctx->hash_final = 0;
140
141 set_dynamic_sa_command_0(sa, SA_NOT_SAVE_HASH, SA_NOT_SAVE_IV,
142 SA_LOAD_HASH_FROM_SA, SA_LOAD_IV_FROM_STATE,
143 SA_NO_HEADER_PROC, SA_HASH_ALG_NULL,
144 SA_CIPHER_ALG_AES, SA_PAD_TYPE_ZERO,
145 SA_OP_GROUP_BASIC, SA_OPCODE_DECRYPT,
146 DIR_INBOUND);
147
148 set_dynamic_sa_command_1(sa, cm, SA_HASH_MODE_HASH,
149 fb, SA_EXTENDED_SN_OFF,
150 SA_SEQ_MASK_OFF, SA_MC_ENABLE,
151 SA_NOT_COPY_PAD, SA_NOT_COPY_PAYLOAD,
152 SA_NOT_COPY_HDR);
153 crypto4xx_memcpy_le(ctx->sa_in + get_dynamic_sa_offset_key_field(ctx),
154 key, keylen);
155 sa->sa_contents = SA_AES_CONTENTS | (keylen << 2);
156 sa->sa_command_1.bf.key_len = keylen >> 3;
157 ctx->is_hash = 0;
158 ctx->direction = DIR_INBOUND;
159 memcpy(ctx->sa_in + get_dynamic_sa_offset_state_ptr_field(ctx),
160 (void *)&ctx->state_record_dma_addr, 4);
161 ctx->offset_to_sr_ptr = get_dynamic_sa_offset_state_ptr_field(ctx);
162
163 memcpy(ctx->sa_out, ctx->sa_in, ctx->sa_len * 4);
164 sa = (struct dynamic_sa_ctl *) ctx->sa_out;
165 sa->sa_command_0.bf.dir = DIR_OUTBOUND;
166
167 return 0;
168}
169
170int crypto4xx_setkey_aes_cbc(struct crypto_ablkcipher *cipher,
171 const u8 *key, unsigned int keylen)
172{
173 return crypto4xx_setkey_aes(cipher, key, keylen, CRYPTO_MODE_CBC,
174 CRYPTO_FEEDBACK_MODE_NO_FB);
175}
176
177/**
178 * HASH SHA1 Functions
179 */
180static int crypto4xx_hash_alg_init(struct crypto_tfm *tfm,
181 unsigned int sa_len,
182 unsigned char ha,
183 unsigned char hm)
184{
185 struct crypto_alg *alg = tfm->__crt_alg;
186 struct crypto4xx_alg *my_alg = crypto_alg_to_crypto4xx_alg(alg);
187 struct crypto4xx_ctx *ctx = crypto_tfm_ctx(tfm);
188 struct dynamic_sa_ctl *sa;
189 struct dynamic_sa_hash160 *sa_in;
190 int rc;
191
192 ctx->dev = my_alg->dev;
193 ctx->is_hash = 1;
194 ctx->hash_final = 0;
195
196 /* Create SA */
197 if (ctx->sa_in_dma_addr || ctx->sa_out_dma_addr)
198 crypto4xx_free_sa(ctx);
199
200 rc = crypto4xx_alloc_sa(ctx, sa_len);
201 if (rc)
202 return rc;
203
204 if (ctx->state_record_dma_addr == 0) {
205 crypto4xx_alloc_state_record(ctx);
206 if (!ctx->state_record_dma_addr) {
207 crypto4xx_free_sa(ctx);
208 return -ENOMEM;
209 }
210 }
211
212 crypto_ahash_set_reqsize(__crypto_ahash_cast(tfm),
213 sizeof(struct crypto4xx_ctx));
214 sa = (struct dynamic_sa_ctl *) ctx->sa_in;
215 set_dynamic_sa_command_0(sa, SA_SAVE_HASH, SA_NOT_SAVE_IV,
216 SA_NOT_LOAD_HASH, SA_LOAD_IV_FROM_SA,
217 SA_NO_HEADER_PROC, ha, SA_CIPHER_ALG_NULL,
218 SA_PAD_TYPE_ZERO, SA_OP_GROUP_BASIC,
219 SA_OPCODE_HASH, DIR_INBOUND);
220 set_dynamic_sa_command_1(sa, 0, SA_HASH_MODE_HASH,
221 CRYPTO_FEEDBACK_MODE_NO_FB, SA_EXTENDED_SN_OFF,
222 SA_SEQ_MASK_OFF, SA_MC_ENABLE,
223 SA_NOT_COPY_PAD, SA_NOT_COPY_PAYLOAD,
224 SA_NOT_COPY_HDR);
225 ctx->direction = DIR_INBOUND;
226 sa->sa_contents = SA_HASH160_CONTENTS;
227 sa_in = (struct dynamic_sa_hash160 *) ctx->sa_in;
228 /* Need to zero hash digest in SA */
229 memset(sa_in->inner_digest, 0, sizeof(sa_in->inner_digest));
230 memset(sa_in->outer_digest, 0, sizeof(sa_in->outer_digest));
231 sa_in->state_ptr = ctx->state_record_dma_addr;
232 ctx->offset_to_sr_ptr = get_dynamic_sa_offset_state_ptr_field(ctx);
233
234 return 0;
235}
236
237int crypto4xx_hash_init(struct ahash_request *req)
238{
239 struct crypto4xx_ctx *ctx = crypto_tfm_ctx(req->base.tfm);
240 int ds;
241 struct dynamic_sa_ctl *sa;
242
243 sa = (struct dynamic_sa_ctl *) ctx->sa_in;
244 ds = crypto_ahash_digestsize(
245 __crypto_ahash_cast(req->base.tfm));
246 sa->sa_command_0.bf.digest_len = ds >> 2;
247 sa->sa_command_0.bf.load_hash_state = SA_LOAD_HASH_FROM_SA;
248 ctx->is_hash = 1;
249 ctx->direction = DIR_INBOUND;
250
251 return 0;
252}
253
254int crypto4xx_hash_update(struct ahash_request *req)
255{
256 struct crypto4xx_ctx *ctx = crypto_tfm_ctx(req->base.tfm);
257
258 ctx->is_hash = 1;
259 ctx->hash_final = 0;
260 ctx->pd_ctl = 0x11;
261 ctx->direction = DIR_INBOUND;
262
263 return crypto4xx_build_pd(&req->base, ctx, req->src,
264 (struct scatterlist *) req->result,
265 req->nbytes, NULL, 0);
266}
267
268int crypto4xx_hash_final(struct ahash_request *req)
269{
270 return 0;
271}
272
273int crypto4xx_hash_digest(struct ahash_request *req)
274{
275 struct crypto4xx_ctx *ctx = crypto_tfm_ctx(req->base.tfm);
276
277 ctx->hash_final = 1;
278 ctx->pd_ctl = 0x11;
279 ctx->direction = DIR_INBOUND;
280
281 return crypto4xx_build_pd(&req->base, ctx, req->src,
282 (struct scatterlist *) req->result,
283 req->nbytes, NULL, 0);
284}
285
286/**
287 * SHA1 Algorithm
288 */
289int crypto4xx_sha1_alg_init(struct crypto_tfm *tfm)
290{
291 return crypto4xx_hash_alg_init(tfm, SA_HASH160_LEN, SA_HASH_ALG_SHA1,
292 SA_HASH_MODE_HASH);
293}
294
295