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(tfm: 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(dst: iv, buf: req->iv, len: ivlen);
82
83 return crypto4xx_build_pd(req: &req->base, ctx, src: req->src, dst: req->dst,
84 datalen: req->cryptlen, iv, iv_len: ivlen, sa: decrypt ? ctx->sa_in : ctx->sa_out,
85 sa_len: ctx->sa_len, assoclen: 0, NULL);
86}
87
88int crypto4xx_encrypt_noiv_block(struct skcipher_request *req)
89{
90 return crypto4xx_crypt(req, ivlen: 0, decrypt: false, check_blocksize: true);
91}
92
93int crypto4xx_encrypt_iv_stream(struct skcipher_request *req)
94{
95 return crypto4xx_crypt(req, AES_IV_SIZE, decrypt: false, check_blocksize: false);
96}
97
98int crypto4xx_decrypt_noiv_block(struct skcipher_request *req)
99{
100 return crypto4xx_crypt(req, ivlen: 0, decrypt: true, check_blocksize: true);
101}
102
103int crypto4xx_decrypt_iv_stream(struct skcipher_request *req)
104{
105 return crypto4xx_crypt(req, AES_IV_SIZE, decrypt: true, check_blocksize: false);
106}
107
108int crypto4xx_encrypt_iv_block(struct skcipher_request *req)
109{
110 return crypto4xx_crypt(req, AES_IV_SIZE, decrypt: false, check_blocksize: true);
111}
112
113int crypto4xx_decrypt_iv_block(struct skcipher_request *req)
114{
115 return crypto4xx_crypt(req, AES_IV_SIZE, decrypt: true, check_blocksize: 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(tfm: 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, save_iv: (cm == CRYPTO_MODE_ECB ?
147 SA_NOT_SAVE_IV : SA_SAVE_IV),
148 SA_NOT_LOAD_HASH, ld_iv: (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 cfb: 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(dst: get_dynamic_sa_key_field(cts: sa),
161 buf: key, len: 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(tfm: cipher);
195 int rc;
196
197 rc = crypto4xx_setkey_aes(cipher, key, keylen: 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(p: (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(tfm: cipher);
212 __le32 iv[AES_IV_SIZE / 4] = {
213 ctx->iv_nonce,
214 cpu_to_le32p(p: (u32 *) req->iv),
215 cpu_to_le32p(p: (u32 *) (req->iv + 4)),
216 cpu_to_le32(1) };
217
218 return crypto4xx_build_pd(req: &req->base, ctx, src: req->src, dst: req->dst,
219 datalen: req->cryptlen, iv, AES_IV_SIZE,
220 sa: ctx->sa_out, sa_len: ctx->sa_len, assoclen: 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(tfm: cipher);
227 __le32 iv[AES_IV_SIZE / 4] = {
228 ctx->iv_nonce,
229 cpu_to_le32p(p: (u32 *) req->iv),
230 cpu_to_le32p(p: (u32 *) (req->iv + 4)),
231 cpu_to_le32(1) };
232
233 return crypto4xx_build_pd(req: &req->base, ctx, src: req->src, dst: req->dst,
234 datalen: req->cryptlen, iv, AES_IV_SIZE,
235 sa: ctx->sa_out, sa_len: ctx->sa_len, assoclen: 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(tfm: cipher);
243 size_t iv_len = crypto_skcipher_ivsize(tfm: cipher);
244 unsigned int counter = be32_to_cpup(p: (__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(req: subreq, tfm: ctx->sw_cipher.cipher);
259 skcipher_request_set_callback(req: subreq, flags: req->base.flags,
260 NULL, NULL);
261 skcipher_request_set_crypt(req: subreq, src: req->src, dst: req->dst,
262 cryptlen: req->cryptlen, iv: req->iv);
263 ret = encrypt ? crypto_skcipher_encrypt(req: subreq)
264 : crypto_skcipher_decrypt(req: subreq);
265 skcipher_request_zero(req: 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(tfm: ctx->sw_cipher.cipher,
279 CRYPTO_TFM_REQ_MASK);
280 crypto_sync_skcipher_set_flags(tfm: ctx->sw_cipher.cipher,
281 flags: crypto_skcipher_get_flags(tfm: cipher) & CRYPTO_TFM_REQ_MASK);
282 return crypto_sync_skcipher_setkey(tfm: 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(tfm: 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, encrypt: true);
302}
303
304int crypto4xx_decrypt_ctr(struct skcipher_request *req)
305{
306 return crypto4xx_ctr_crypt(req, encrypt: 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(req: subreq, tfm: ctx->sw_cipher.aead);
343 aead_request_set_callback(req: subreq, flags: req->base.flags,
344 compl: req->base.complete, data: req->base.data);
345 aead_request_set_crypt(req: subreq, src: req->src, dst: req->dst, cryptlen: req->cryptlen,
346 iv: req->iv);
347 aead_request_set_ad(req: subreq, assoclen: req->assoclen);
348 return do_decrypt ? crypto_aead_decrypt(req: subreq) :
349 crypto_aead_encrypt(req: 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(tfm: ctx->sw_cipher.aead, CRYPTO_TFM_REQ_MASK);
358 crypto_aead_set_flags(tfm: ctx->sw_cipher.aead,
359 flags: crypto_aead_get_flags(tfm: cipher) & CRYPTO_TFM_REQ_MASK);
360 return crypto_aead_setkey(tfm: 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(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(dst: get_dynamic_sa_key_field(cts: sa), buf: key, len: 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(tfm: 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(tfm: aead);
439
440 if (crypto4xx_aead_need_fallback(req, len, is_ccm: true, decrypt))
441 return crypto4xx_aead_fallback(req, ctx, do_decrypt: 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(tfm: 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(dst: iv, buf: req->iv, len: 16 - (req->iv[0] + 1));
453
454 return crypto4xx_build_pd(req: &req->base, ctx, src: req->src, dst: req->dst,
455 datalen: len, iv, iv_len: sizeof(iv),
456 sa, sa_len: ctx->sa_len, assoclen: req->assoclen, dst_tmp: rctx->dst);
457}
458
459int crypto4xx_encrypt_aes_ccm(struct aead_request *req)
460{
461 return crypto4xx_crypt_aes_ccm(req, decrypt: false);
462}
463
464int crypto4xx_decrypt_aes_ccm(struct aead_request *req)
465{
466 return crypto4xx_crypt_aes_ccm(req, decrypt: true);
467}
468
469int crypto4xx_setauthsize_aead(struct crypto_aead *cipher,
470 unsigned int authsize)
471{
472 struct crypto_tfm *tfm = crypto_aead_tfm(tfm: cipher);
473 struct crypto4xx_ctx *ctx = crypto_tfm_ctx(tfm);
474
475 return crypto_aead_setauthsize(tfm: 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: &ctx, in_key: key, key_len: keylen);
502 if (rc) {
503 pr_err("aes_expandkey() failed: %d\n", rc);
504 return rc;
505 }
506
507 aes_encrypt(ctx: &ctx, out: src, in: src);
508 crypto4xx_memcpy_to_le32(dst: hash_start, buf: src, len: 16);
509 memzero_explicit(s: &ctx, count: 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(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(dst: get_dynamic_sa_key_field(cts: sa),
553 buf: key, len: keylen);
554
555 rc = crypto4xx_compute_gcm_hash_key_sw(hash_start: get_dynamic_sa_inner_digest(cts: 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(tfm: 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(tfm: crypto_aead_reqtfm(req));
583
584 if (crypto4xx_aead_need_fallback(req, len, is_ccm: false, decrypt))
585 return crypto4xx_aead_fallback(req, ctx, do_decrypt: decrypt);
586
587 crypto4xx_memcpy_to_le32(dst: iv, buf: req->iv, GCM_AES_IV_SIZE);
588 iv[3] = cpu_to_le32(1);
589
590 return crypto4xx_build_pd(req: &req->base, ctx, src: req->src, dst: req->dst,
591 datalen: len, iv, iv_len: sizeof(iv),
592 sa: decrypt ? ctx->sa_in : ctx->sa_out,
593 sa_len: ctx->sa_len, assoclen: req->assoclen, dst_tmp: rctx->dst);
594}
595
596int crypto4xx_encrypt_aes_gcm(struct aead_request *req)
597{
598 return crypto4xx_crypt_aes_gcm(req, decrypt: false);
599}
600
601int crypto4xx_decrypt_aes_gcm(struct aead_request *req)
602{
603 return crypto4xx_crypt_aes_gcm(req, decrypt: 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, size: sa_len);
629 if (rc)
630 return rc;
631
632 crypto_ahash_set_reqsize(tfm: __crypto_ahash_cast(tfm),
633 reqsize: sizeof(struct crypto4xx_ctx));
634 sa = (struct dynamic_sa_hash160 *)ctx->sa_in;
635 set_dynamic_sa_command_0(sa: &sa->ctrl, SA_SAVE_HASH, SA_NOT_SAVE_IV,
636 SA_NOT_LOAD_HASH, SA_LOAD_IV_FROM_SA,
637 SA_NO_HEADER_PROC, h: 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: &sa->ctrl, cm: 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(tfm: req->base.tfm);
655 int ds;
656 struct dynamic_sa_ctl *sa;
657
658 sa = ctx->sa_in;
659 ds = crypto_ahash_digestsize(
660 tfm: __crypto_ahash_cast(tfm: 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(tfm: req->base.tfm);
671 struct scatterlist dst;
672 unsigned int ds = crypto_ahash_digestsize(tfm: ahash);
673
674 sg_init_one(&dst, req->result, ds);
675
676 return crypto4xx_build_pd(req: &req->base, ctx, src: req->src, dst: &dst,
677 datalen: req->nbytes, NULL, iv_len: 0, sa: ctx->sa_in,
678 sa_len: ctx->sa_len, assoclen: 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(tfm: req->base.tfm);
690 struct scatterlist dst;
691 unsigned int ds = crypto_ahash_digestsize(tfm: ahash);
692
693 sg_init_one(&dst, req->result, ds);
694
695 return crypto4xx_build_pd(req: &req->base, ctx, src: req->src, dst: &dst,
696 datalen: req->nbytes, NULL, iv_len: 0, sa: ctx->sa_in,
697 sa_len: ctx->sa_len, assoclen: 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}
708

source code of linux/drivers/crypto/amcc/crypto4xx_alg.c