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 30 static 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 50 static 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 69 static 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 88 int crypto4xx_encrypt_noiv_block(struct skcipher_request *req) 89 { 90 return crypto4xx_crypt(req, 0, false, true); 91 } 92 93 int crypto4xx_encrypt_iv_stream(struct skcipher_request *req) 94 { 95 return crypto4xx_crypt(req, AES_IV_SIZE, false, false); 96 } 97 98 int crypto4xx_decrypt_noiv_block(struct skcipher_request *req) 99 { 100 return crypto4xx_crypt(req, 0, true, true); 101 } 102 103 int crypto4xx_decrypt_iv_stream(struct skcipher_request *req) 104 { 105 return crypto4xx_crypt(req, AES_IV_SIZE, true, false); 106 } 107 108 int crypto4xx_encrypt_iv_block(struct skcipher_request *req) 109 { 110 return crypto4xx_crypt(req, AES_IV_SIZE, false, true); 111 } 112 113 int 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 */ 121 static 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 } 176 177 int 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 } 183 184 int 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 } 190 191 int 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 } 197 198 int 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 } 204 205 int 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 } 221 222 int 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 } 236 237 int 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 } 251 252 static int 253 crypto4xx_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 } 286 287 static 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 } 298 299 int 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 } 312 313 int crypto4xx_encrypt_ctr(struct skcipher_request *req) 314 { 315 return crypto4xx_ctr_crypt(req, true); 316 } 317 318 int crypto4xx_decrypt_ctr(struct skcipher_request *req) 319 { 320 return crypto4xx_ctr_crypt(req, false); 321 } 322 323 static 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 } 350 351 static 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 } 365 366 static 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 */ 380 381 int 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 } 440 441 static 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 } 472 473 int crypto4xx_encrypt_aes_ccm(struct aead_request *req) 474 { 475 return crypto4xx_crypt_aes_ccm(req, false); 476 } 477 478 int crypto4xx_decrypt_aes_ccm(struct aead_request *req) 479 { 480 return crypto4xx_crypt_aes_ccm(req, true); 481 } 482 483 int 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 */ 495 496 static 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 } 507 508 static 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 } 526 527 int 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; 582 err: 583 crypto4xx_free_sa(ctx); 584 return rc; 585 } 586 587 static 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 } 609 610 int crypto4xx_encrypt_aes_gcm(struct aead_request *req) 611 { 612 return crypto4xx_crypt_aes_gcm(req, false); 613 } 614 615 int 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 */ 623 static 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 } 665 666 int 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 } 680 681 int 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 } 694 695 int crypto4xx_hash_final(struct ahash_request *req) 696 { 697 return 0; 698 } 699 700 int 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 */ 717 int 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 } 722