2 * AMCC SoC PPC4xx Crypto Driver
4 * Copyright (c) 2008 Applied Micro Circuits Corporation.
5 * All rights reserved. James Hsiao <jhsiao@amcc.com>
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.
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.
17 * This file implements the Linux crypto algorithms.
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 <crypto/skcipher.h>
35 #include "crypto4xx_reg_def.h"
36 #include "crypto4xx_core.h"
37 #include "crypto4xx_sa.h"
39 static void set_dynamic_sa_command_0(struct dynamic_sa_ctl *sa, u32 save_h,
40 u32 save_iv, u32 ld_h, u32 ld_iv,
41 u32 hdr_proc, u32 h, u32 c, u32 pad_type,
42 u32 op_grp, u32 op, u32 dir)
44 sa->sa_command_0.w = 0;
45 sa->sa_command_0.bf.save_hash_state = save_h;
46 sa->sa_command_0.bf.save_iv = save_iv;
47 sa->sa_command_0.bf.load_hash_state = ld_h;
48 sa->sa_command_0.bf.load_iv = ld_iv;
49 sa->sa_command_0.bf.hdr_proc = hdr_proc;
50 sa->sa_command_0.bf.hash_alg = h;
51 sa->sa_command_0.bf.cipher_alg = c;
52 sa->sa_command_0.bf.pad_type = pad_type & 3;
53 sa->sa_command_0.bf.extend_pad = pad_type >> 2;
54 sa->sa_command_0.bf.op_group = op_grp;
55 sa->sa_command_0.bf.opcode = op;
56 sa->sa_command_0.bf.dir = dir;
59 static void set_dynamic_sa_command_1(struct dynamic_sa_ctl *sa, u32 cm,
60 u32 hmac_mc, u32 cfb, u32 esn,
61 u32 sn_mask, u32 mute, u32 cp_pad,
62 u32 cp_pay, u32 cp_hdr)
64 sa->sa_command_1.w = 0;
65 sa->sa_command_1.bf.crypto_mode31 = (cm & 4) >> 2;
66 sa->sa_command_1.bf.crypto_mode9_8 = cm & 3;
67 sa->sa_command_1.bf.feedback_mode = cfb,
68 sa->sa_command_1.bf.sa_rev = 1;
69 sa->sa_command_1.bf.hmac_muting = hmac_mc;
70 sa->sa_command_1.bf.extended_seq_num = esn;
71 sa->sa_command_1.bf.seq_num_mask = sn_mask;
72 sa->sa_command_1.bf.mutable_bit_proc = mute;
73 sa->sa_command_1.bf.copy_pad = cp_pad;
74 sa->sa_command_1.bf.copy_payload = cp_pay;
75 sa->sa_command_1.bf.copy_hdr = cp_hdr;
78 static inline int crypto4xx_crypt(struct skcipher_request *req,
79 const unsigned int ivlen, bool decrypt,
82 struct crypto_skcipher *cipher = crypto_skcipher_reqtfm(req);
83 struct crypto4xx_ctx *ctx = crypto_skcipher_ctx(cipher);
84 __le32 iv[AES_IV_SIZE];
86 if (check_blocksize && !IS_ALIGNED(req->cryptlen, AES_BLOCK_SIZE))
90 crypto4xx_memcpy_to_le32(iv, req->iv, ivlen);
92 return crypto4xx_build_pd(&req->base, ctx, req->src, req->dst,
93 req->cryptlen, iv, ivlen, decrypt ? ctx->sa_in : ctx->sa_out,
94 ctx->sa_len, 0, NULL);
97 int crypto4xx_encrypt_noiv_block(struct skcipher_request *req)
99 return crypto4xx_crypt(req, 0, false, true);
102 int crypto4xx_encrypt_iv_stream(struct skcipher_request *req)
104 return crypto4xx_crypt(req, AES_IV_SIZE, false, false);
107 int crypto4xx_decrypt_noiv_block(struct skcipher_request *req)
109 return crypto4xx_crypt(req, 0, true, true);
112 int crypto4xx_decrypt_iv_stream(struct skcipher_request *req)
114 return crypto4xx_crypt(req, AES_IV_SIZE, true, false);
117 int crypto4xx_encrypt_iv_block(struct skcipher_request *req)
119 return crypto4xx_crypt(req, AES_IV_SIZE, false, true);
122 int crypto4xx_decrypt_iv_block(struct skcipher_request *req)
124 return crypto4xx_crypt(req, AES_IV_SIZE, true, true);
130 static int crypto4xx_setkey_aes(struct crypto_skcipher *cipher,
136 struct crypto4xx_ctx *ctx = crypto_skcipher_ctx(cipher);
137 struct dynamic_sa_ctl *sa;
140 if (keylen != AES_KEYSIZE_256 &&
141 keylen != AES_KEYSIZE_192 && keylen != AES_KEYSIZE_128) {
142 crypto_skcipher_set_flags(cipher,
143 CRYPTO_TFM_RES_BAD_KEY_LEN);
148 if (ctx->sa_in || ctx->sa_out)
149 crypto4xx_free_sa(ctx);
151 rc = crypto4xx_alloc_sa(ctx, SA_AES128_LEN + (keylen-16) / 4);
158 set_dynamic_sa_command_0(sa, SA_NOT_SAVE_HASH, (cm == CRYPTO_MODE_ECB ?
159 SA_NOT_SAVE_IV : SA_SAVE_IV),
160 SA_NOT_LOAD_HASH, (cm == CRYPTO_MODE_ECB ?
161 SA_LOAD_IV_FROM_SA : SA_LOAD_IV_FROM_STATE),
162 SA_NO_HEADER_PROC, SA_HASH_ALG_NULL,
163 SA_CIPHER_ALG_AES, SA_PAD_TYPE_ZERO,
164 SA_OP_GROUP_BASIC, SA_OPCODE_DECRYPT,
167 set_dynamic_sa_command_1(sa, cm, SA_HASH_MODE_HASH,
168 fb, SA_EXTENDED_SN_OFF,
169 SA_SEQ_MASK_OFF, SA_MC_ENABLE,
170 SA_NOT_COPY_PAD, SA_NOT_COPY_PAYLOAD,
172 crypto4xx_memcpy_to_le32(get_dynamic_sa_key_field(sa),
174 sa->sa_contents.w = SA_AES_CONTENTS | (keylen << 2);
175 sa->sa_command_1.bf.key_len = keylen >> 3;
177 memcpy(ctx->sa_out, ctx->sa_in, ctx->sa_len * 4);
179 sa->sa_command_0.bf.dir = DIR_OUTBOUND;
181 * SA_OPCODE_ENCRYPT is the same value as SA_OPCODE_DECRYPT.
182 * it's the DIR_(IN|OUT)BOUND that matters
184 sa->sa_command_0.bf.opcode = SA_OPCODE_ENCRYPT;
189 int crypto4xx_setkey_aes_cbc(struct crypto_skcipher *cipher,
190 const u8 *key, unsigned int keylen)
192 return crypto4xx_setkey_aes(cipher, key, keylen, CRYPTO_MODE_CBC,
193 CRYPTO_FEEDBACK_MODE_NO_FB);
196 int crypto4xx_setkey_aes_cfb(struct crypto_skcipher *cipher,
197 const u8 *key, unsigned int keylen)
199 return crypto4xx_setkey_aes(cipher, key, keylen, CRYPTO_MODE_CFB,
200 CRYPTO_FEEDBACK_MODE_128BIT_CFB);
203 int crypto4xx_setkey_aes_ecb(struct crypto_skcipher *cipher,
204 const u8 *key, unsigned int keylen)
206 return crypto4xx_setkey_aes(cipher, key, keylen, CRYPTO_MODE_ECB,
207 CRYPTO_FEEDBACK_MODE_NO_FB);
210 int crypto4xx_setkey_aes_ofb(struct crypto_skcipher *cipher,
211 const u8 *key, unsigned int keylen)
213 return crypto4xx_setkey_aes(cipher, key, keylen, CRYPTO_MODE_OFB,
214 CRYPTO_FEEDBACK_MODE_64BIT_OFB);
217 int crypto4xx_setkey_rfc3686(struct crypto_skcipher *cipher,
218 const u8 *key, unsigned int keylen)
220 struct crypto4xx_ctx *ctx = crypto_skcipher_ctx(cipher);
223 rc = crypto4xx_setkey_aes(cipher, key, keylen - CTR_RFC3686_NONCE_SIZE,
224 CRYPTO_MODE_CTR, CRYPTO_FEEDBACK_MODE_NO_FB);
228 ctx->iv_nonce = cpu_to_le32p((u32 *)&key[keylen -
229 CTR_RFC3686_NONCE_SIZE]);
234 int crypto4xx_rfc3686_encrypt(struct skcipher_request *req)
236 struct crypto_skcipher *cipher = crypto_skcipher_reqtfm(req);
237 struct crypto4xx_ctx *ctx = crypto_skcipher_ctx(cipher);
238 __le32 iv[AES_IV_SIZE / 4] = {
240 cpu_to_le32p((u32 *) req->iv),
241 cpu_to_le32p((u32 *) (req->iv + 4)),
244 return crypto4xx_build_pd(&req->base, ctx, req->src, req->dst,
245 req->cryptlen, iv, AES_IV_SIZE,
246 ctx->sa_out, ctx->sa_len, 0, NULL);
249 int crypto4xx_rfc3686_decrypt(struct skcipher_request *req)
251 struct crypto_skcipher *cipher = crypto_skcipher_reqtfm(req);
252 struct crypto4xx_ctx *ctx = crypto_skcipher_ctx(cipher);
253 __le32 iv[AES_IV_SIZE / 4] = {
255 cpu_to_le32p((u32 *) req->iv),
256 cpu_to_le32p((u32 *) (req->iv + 4)),
259 return crypto4xx_build_pd(&req->base, ctx, req->src, req->dst,
260 req->cryptlen, iv, AES_IV_SIZE,
261 ctx->sa_out, ctx->sa_len, 0, NULL);
265 crypto4xx_ctr_crypt(struct skcipher_request *req, bool encrypt)
267 struct crypto_skcipher *cipher = crypto_skcipher_reqtfm(req);
268 struct crypto4xx_ctx *ctx = crypto_skcipher_ctx(cipher);
269 size_t iv_len = crypto_skcipher_ivsize(cipher);
270 unsigned int counter = be32_to_cpup((__be32 *)(req->iv + iv_len - 4));
271 unsigned int nblks = ALIGN(req->cryptlen, AES_BLOCK_SIZE) /
275 * The hardware uses only the last 32-bits as the counter while the
276 * kernel tests (aes_ctr_enc_tv_template[4] for example) expect that
277 * the whole IV is a counter. So fallback if the counter is going to
280 if (counter + nblks < counter) {
281 struct skcipher_request *subreq = skcipher_request_ctx(req);
284 skcipher_request_set_tfm(subreq, ctx->sw_cipher.cipher);
285 skcipher_request_set_callback(subreq, req->base.flags,
287 skcipher_request_set_crypt(subreq, req->src, req->dst,
288 req->cryptlen, req->iv);
289 ret = encrypt ? crypto_skcipher_encrypt(subreq)
290 : crypto_skcipher_decrypt(subreq);
291 skcipher_request_zero(subreq);
295 return encrypt ? crypto4xx_encrypt_iv_stream(req)
296 : crypto4xx_decrypt_iv_stream(req);
299 static int crypto4xx_sk_setup_fallback(struct crypto4xx_ctx *ctx,
300 struct crypto_skcipher *cipher,
306 crypto_skcipher_clear_flags(ctx->sw_cipher.cipher,
307 CRYPTO_TFM_REQ_MASK);
308 crypto_skcipher_set_flags(ctx->sw_cipher.cipher,
309 crypto_skcipher_get_flags(cipher) & CRYPTO_TFM_REQ_MASK);
310 rc = crypto_skcipher_setkey(ctx->sw_cipher.cipher, key, keylen);
311 crypto_skcipher_clear_flags(cipher, CRYPTO_TFM_RES_MASK);
312 crypto_skcipher_set_flags(cipher,
313 crypto_skcipher_get_flags(ctx->sw_cipher.cipher) &
314 CRYPTO_TFM_RES_MASK);
319 int crypto4xx_setkey_aes_ctr(struct crypto_skcipher *cipher,
320 const u8 *key, unsigned int keylen)
322 struct crypto4xx_ctx *ctx = crypto_skcipher_ctx(cipher);
325 rc = crypto4xx_sk_setup_fallback(ctx, cipher, key, keylen);
329 return crypto4xx_setkey_aes(cipher, key, keylen,
330 CRYPTO_MODE_CTR, CRYPTO_FEEDBACK_MODE_NO_FB);
333 int crypto4xx_encrypt_ctr(struct skcipher_request *req)
335 return crypto4xx_ctr_crypt(req, true);
338 int crypto4xx_decrypt_ctr(struct skcipher_request *req)
340 return crypto4xx_ctr_crypt(req, false);
343 static inline bool crypto4xx_aead_need_fallback(struct aead_request *req,
345 bool is_ccm, bool decrypt)
347 struct crypto_aead *aead = crypto_aead_reqtfm(req);
349 /* authsize has to be a multiple of 4 */
350 if (aead->authsize & 3)
354 * hardware does not handle cases where plaintext
355 * is less than a block.
357 if (len < AES_BLOCK_SIZE)
360 /* assoc len needs to be a multiple of 4 and <= 1020 */
361 if (req->assoclen & 0x3 || req->assoclen > 1020)
364 /* CCM supports only counter field length of 2 and 4 bytes */
365 if (is_ccm && !(req->iv[0] == 1 || req->iv[0] == 3))
371 static int crypto4xx_aead_fallback(struct aead_request *req,
372 struct crypto4xx_ctx *ctx, bool do_decrypt)
374 struct aead_request *subreq = aead_request_ctx(req);
376 aead_request_set_tfm(subreq, ctx->sw_cipher.aead);
377 aead_request_set_callback(subreq, req->base.flags,
378 req->base.complete, req->base.data);
379 aead_request_set_crypt(subreq, req->src, req->dst, req->cryptlen,
381 aead_request_set_ad(subreq, req->assoclen);
382 return do_decrypt ? crypto_aead_decrypt(subreq) :
383 crypto_aead_encrypt(subreq);
386 static int crypto4xx_aead_setup_fallback(struct crypto4xx_ctx *ctx,
387 struct crypto_aead *cipher,
393 crypto_aead_clear_flags(ctx->sw_cipher.aead, CRYPTO_TFM_REQ_MASK);
394 crypto_aead_set_flags(ctx->sw_cipher.aead,
395 crypto_aead_get_flags(cipher) & CRYPTO_TFM_REQ_MASK);
396 rc = crypto_aead_setkey(ctx->sw_cipher.aead, key, keylen);
397 crypto_aead_clear_flags(cipher, CRYPTO_TFM_RES_MASK);
398 crypto_aead_set_flags(cipher,
399 crypto_aead_get_flags(ctx->sw_cipher.aead) &
400 CRYPTO_TFM_RES_MASK);
409 int crypto4xx_setkey_aes_ccm(struct crypto_aead *cipher, const u8 *key,
412 struct crypto_tfm *tfm = crypto_aead_tfm(cipher);
413 struct crypto4xx_ctx *ctx = crypto_tfm_ctx(tfm);
414 struct dynamic_sa_ctl *sa;
417 rc = crypto4xx_aead_setup_fallback(ctx, cipher, key, keylen);
421 if (ctx->sa_in || ctx->sa_out)
422 crypto4xx_free_sa(ctx);
424 rc = crypto4xx_alloc_sa(ctx, SA_AES128_CCM_LEN + (keylen - 16) / 4);
429 sa = (struct dynamic_sa_ctl *) ctx->sa_in;
430 sa->sa_contents.w = SA_AES_CCM_CONTENTS | (keylen << 2);
432 set_dynamic_sa_command_0(sa, SA_SAVE_HASH, SA_NOT_SAVE_IV,
433 SA_LOAD_HASH_FROM_SA, SA_LOAD_IV_FROM_STATE,
434 SA_NO_HEADER_PROC, SA_HASH_ALG_CBC_MAC,
436 SA_PAD_TYPE_ZERO, SA_OP_GROUP_BASIC,
437 SA_OPCODE_HASH_DECRYPT, DIR_INBOUND);
439 set_dynamic_sa_command_1(sa, CRYPTO_MODE_CTR, SA_HASH_MODE_HASH,
440 CRYPTO_FEEDBACK_MODE_NO_FB, SA_EXTENDED_SN_OFF,
441 SA_SEQ_MASK_OFF, SA_MC_ENABLE,
442 SA_NOT_COPY_PAD, SA_COPY_PAYLOAD,
445 sa->sa_command_1.bf.key_len = keylen >> 3;
447 crypto4xx_memcpy_to_le32(get_dynamic_sa_key_field(sa), key, keylen);
449 memcpy(ctx->sa_out, ctx->sa_in, ctx->sa_len * 4);
450 sa = (struct dynamic_sa_ctl *) ctx->sa_out;
452 set_dynamic_sa_command_0(sa, SA_SAVE_HASH, SA_NOT_SAVE_IV,
453 SA_LOAD_HASH_FROM_SA, SA_LOAD_IV_FROM_STATE,
454 SA_NO_HEADER_PROC, SA_HASH_ALG_CBC_MAC,
456 SA_PAD_TYPE_ZERO, SA_OP_GROUP_BASIC,
457 SA_OPCODE_ENCRYPT_HASH, DIR_OUTBOUND);
459 set_dynamic_sa_command_1(sa, CRYPTO_MODE_CTR, SA_HASH_MODE_HASH,
460 CRYPTO_FEEDBACK_MODE_NO_FB, SA_EXTENDED_SN_OFF,
461 SA_SEQ_MASK_OFF, SA_MC_ENABLE,
462 SA_COPY_PAD, SA_COPY_PAYLOAD,
465 sa->sa_command_1.bf.key_len = keylen >> 3;
469 static int crypto4xx_crypt_aes_ccm(struct aead_request *req, bool decrypt)
471 struct crypto4xx_ctx *ctx = crypto_tfm_ctx(req->base.tfm);
472 struct crypto4xx_aead_reqctx *rctx = aead_request_ctx(req);
473 struct crypto_aead *aead = crypto_aead_reqtfm(req);
475 u32 tmp_sa[SA_AES128_CCM_LEN + 4];
476 struct dynamic_sa_ctl *sa = (struct dynamic_sa_ctl *)tmp_sa;
477 unsigned int len = req->cryptlen;
480 len -= crypto_aead_authsize(aead);
482 if (crypto4xx_aead_need_fallback(req, len, true, decrypt))
483 return crypto4xx_aead_fallback(req, ctx, decrypt);
485 memcpy(tmp_sa, decrypt ? ctx->sa_in : ctx->sa_out, ctx->sa_len * 4);
486 sa->sa_command_0.bf.digest_len = crypto_aead_authsize(aead) >> 2;
488 if (req->iv[0] == 1) {
489 /* CRYPTO_MODE_AES_ICM */
490 sa->sa_command_1.bf.crypto_mode9_8 = 1;
493 iv[3] = cpu_to_le32(0);
494 crypto4xx_memcpy_to_le32(iv, req->iv, 16 - (req->iv[0] + 1));
496 return crypto4xx_build_pd(&req->base, ctx, req->src, req->dst,
498 sa, ctx->sa_len, req->assoclen, rctx->dst);
501 int crypto4xx_encrypt_aes_ccm(struct aead_request *req)
503 return crypto4xx_crypt_aes_ccm(req, false);
506 int crypto4xx_decrypt_aes_ccm(struct aead_request *req)
508 return crypto4xx_crypt_aes_ccm(req, true);
511 int crypto4xx_setauthsize_aead(struct crypto_aead *cipher,
512 unsigned int authsize)
514 struct crypto_tfm *tfm = crypto_aead_tfm(cipher);
515 struct crypto4xx_ctx *ctx = crypto_tfm_ctx(tfm);
517 return crypto_aead_setauthsize(ctx->sw_cipher.aead, authsize);
524 static int crypto4xx_aes_gcm_validate_keylen(unsigned int keylen)
536 static int crypto4xx_compute_gcm_hash_key_sw(__le32 *hash_start, const u8 *key,
539 struct crypto_cipher *aes_tfm = NULL;
540 uint8_t src[16] = { 0 };
543 aes_tfm = crypto_alloc_cipher("aes", 0, CRYPTO_ALG_ASYNC |
544 CRYPTO_ALG_NEED_FALLBACK);
545 if (IS_ERR(aes_tfm)) {
546 rc = PTR_ERR(aes_tfm);
547 pr_warn("could not load aes cipher driver: %d\n", rc);
551 rc = crypto_cipher_setkey(aes_tfm, key, keylen);
553 pr_err("setkey() failed: %d\n", rc);
557 crypto_cipher_encrypt_one(aes_tfm, src, src);
558 crypto4xx_memcpy_to_le32(hash_start, src, 16);
560 crypto_free_cipher(aes_tfm);
564 int crypto4xx_setkey_aes_gcm(struct crypto_aead *cipher,
565 const u8 *key, unsigned int keylen)
567 struct crypto_tfm *tfm = crypto_aead_tfm(cipher);
568 struct crypto4xx_ctx *ctx = crypto_tfm_ctx(tfm);
569 struct dynamic_sa_ctl *sa;
572 if (crypto4xx_aes_gcm_validate_keylen(keylen) != 0) {
573 crypto_aead_set_flags(cipher, CRYPTO_TFM_RES_BAD_KEY_LEN);
577 rc = crypto4xx_aead_setup_fallback(ctx, cipher, key, keylen);
581 if (ctx->sa_in || ctx->sa_out)
582 crypto4xx_free_sa(ctx);
584 rc = crypto4xx_alloc_sa(ctx, SA_AES128_GCM_LEN + (keylen - 16) / 4);
588 sa = (struct dynamic_sa_ctl *) ctx->sa_in;
590 sa->sa_contents.w = SA_AES_GCM_CONTENTS | (keylen << 2);
591 set_dynamic_sa_command_0(sa, SA_SAVE_HASH, SA_NOT_SAVE_IV,
592 SA_LOAD_HASH_FROM_SA, SA_LOAD_IV_FROM_STATE,
593 SA_NO_HEADER_PROC, SA_HASH_ALG_GHASH,
594 SA_CIPHER_ALG_AES, SA_PAD_TYPE_ZERO,
595 SA_OP_GROUP_BASIC, SA_OPCODE_HASH_DECRYPT,
597 set_dynamic_sa_command_1(sa, CRYPTO_MODE_CTR, SA_HASH_MODE_HASH,
598 CRYPTO_FEEDBACK_MODE_NO_FB, SA_EXTENDED_SN_OFF,
599 SA_SEQ_MASK_ON, SA_MC_DISABLE,
600 SA_NOT_COPY_PAD, SA_COPY_PAYLOAD,
603 sa->sa_command_1.bf.key_len = keylen >> 3;
605 crypto4xx_memcpy_to_le32(get_dynamic_sa_key_field(sa),
608 rc = crypto4xx_compute_gcm_hash_key_sw(get_dynamic_sa_inner_digest(sa),
611 pr_err("GCM hash key setting failed = %d\n", rc);
615 memcpy(ctx->sa_out, ctx->sa_in, ctx->sa_len * 4);
616 sa = (struct dynamic_sa_ctl *) ctx->sa_out;
617 sa->sa_command_0.bf.dir = DIR_OUTBOUND;
618 sa->sa_command_0.bf.opcode = SA_OPCODE_ENCRYPT_HASH;
622 crypto4xx_free_sa(ctx);
626 static inline int crypto4xx_crypt_aes_gcm(struct aead_request *req,
629 struct crypto4xx_ctx *ctx = crypto_tfm_ctx(req->base.tfm);
630 struct crypto4xx_aead_reqctx *rctx = aead_request_ctx(req);
632 unsigned int len = req->cryptlen;
635 len -= crypto_aead_authsize(crypto_aead_reqtfm(req));
637 if (crypto4xx_aead_need_fallback(req, len, false, decrypt))
638 return crypto4xx_aead_fallback(req, ctx, decrypt);
640 crypto4xx_memcpy_to_le32(iv, req->iv, GCM_AES_IV_SIZE);
641 iv[3] = cpu_to_le32(1);
643 return crypto4xx_build_pd(&req->base, ctx, req->src, req->dst,
645 decrypt ? ctx->sa_in : ctx->sa_out,
646 ctx->sa_len, req->assoclen, rctx->dst);
649 int crypto4xx_encrypt_aes_gcm(struct aead_request *req)
651 return crypto4xx_crypt_aes_gcm(req, false);
654 int crypto4xx_decrypt_aes_gcm(struct aead_request *req)
656 return crypto4xx_crypt_aes_gcm(req, true);
660 * HASH SHA1 Functions
662 static int crypto4xx_hash_alg_init(struct crypto_tfm *tfm,
667 struct crypto_alg *alg = tfm->__crt_alg;
668 struct crypto4xx_alg *my_alg;
669 struct crypto4xx_ctx *ctx = crypto_tfm_ctx(tfm);
670 struct dynamic_sa_hash160 *sa;
673 my_alg = container_of(__crypto_ahash_alg(alg), struct crypto4xx_alg,
675 ctx->dev = my_alg->dev;
678 if (ctx->sa_in || ctx->sa_out)
679 crypto4xx_free_sa(ctx);
681 rc = crypto4xx_alloc_sa(ctx, sa_len);
685 crypto_ahash_set_reqsize(__crypto_ahash_cast(tfm),
686 sizeof(struct crypto4xx_ctx));
687 sa = (struct dynamic_sa_hash160 *)ctx->sa_in;
688 set_dynamic_sa_command_0(&sa->ctrl, SA_SAVE_HASH, SA_NOT_SAVE_IV,
689 SA_NOT_LOAD_HASH, SA_LOAD_IV_FROM_SA,
690 SA_NO_HEADER_PROC, ha, SA_CIPHER_ALG_NULL,
691 SA_PAD_TYPE_ZERO, SA_OP_GROUP_BASIC,
692 SA_OPCODE_HASH, DIR_INBOUND);
693 set_dynamic_sa_command_1(&sa->ctrl, 0, SA_HASH_MODE_HASH,
694 CRYPTO_FEEDBACK_MODE_NO_FB, SA_EXTENDED_SN_OFF,
695 SA_SEQ_MASK_OFF, SA_MC_ENABLE,
696 SA_NOT_COPY_PAD, SA_NOT_COPY_PAYLOAD,
698 /* Need to zero hash digest in SA */
699 memset(sa->inner_digest, 0, sizeof(sa->inner_digest));
700 memset(sa->outer_digest, 0, sizeof(sa->outer_digest));
705 int crypto4xx_hash_init(struct ahash_request *req)
707 struct crypto4xx_ctx *ctx = crypto_tfm_ctx(req->base.tfm);
709 struct dynamic_sa_ctl *sa;
712 ds = crypto_ahash_digestsize(
713 __crypto_ahash_cast(req->base.tfm));
714 sa->sa_command_0.bf.digest_len = ds >> 2;
715 sa->sa_command_0.bf.load_hash_state = SA_LOAD_HASH_FROM_SA;
720 int crypto4xx_hash_update(struct ahash_request *req)
722 struct crypto_ahash *ahash = crypto_ahash_reqtfm(req);
723 struct crypto4xx_ctx *ctx = crypto_tfm_ctx(req->base.tfm);
724 struct scatterlist dst;
725 unsigned int ds = crypto_ahash_digestsize(ahash);
727 sg_init_one(&dst, req->result, ds);
729 return crypto4xx_build_pd(&req->base, ctx, req->src, &dst,
730 req->nbytes, NULL, 0, ctx->sa_in,
731 ctx->sa_len, 0, NULL);
734 int crypto4xx_hash_final(struct ahash_request *req)
739 int crypto4xx_hash_digest(struct ahash_request *req)
741 struct crypto_ahash *ahash = crypto_ahash_reqtfm(req);
742 struct crypto4xx_ctx *ctx = crypto_tfm_ctx(req->base.tfm);
743 struct scatterlist dst;
744 unsigned int ds = crypto_ahash_digestsize(ahash);
746 sg_init_one(&dst, req->result, ds);
748 return crypto4xx_build_pd(&req->base, ctx, req->src, &dst,
749 req->nbytes, NULL, 0, ctx->sa_in,
750 ctx->sa_len, 0, NULL);
756 int crypto4xx_sha1_alg_init(struct crypto_tfm *tfm)
758 return crypto4xx_hash_alg_init(tfm, SA_HASH160_LEN, SA_HASH_ALG_SHA1,