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 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 { 72 struct crypto_skcipher *cipher = crypto_skcipher_reqtfm(req); 73 struct crypto4xx_ctx *ctx = crypto_skcipher_ctx(cipher); 74 __le32 iv[AES_IV_SIZE]; 75 76 if (ivlen) 77 crypto4xx_memcpy_to_le32(iv, req->iv, ivlen); 78 79 return crypto4xx_build_pd(&req->base, ctx, req->src, req->dst, 80 req->cryptlen, iv, ivlen, decrypt ? ctx->sa_in : ctx->sa_out, 81 ctx->sa_len, 0, NULL); 82 } 83 84 int crypto4xx_encrypt_noiv(struct skcipher_request *req) 85 { 86 return crypto4xx_crypt(req, 0, false); 87 } 88 89 int crypto4xx_encrypt_iv(struct skcipher_request *req) 90 { 91 return crypto4xx_crypt(req, AES_IV_SIZE, false); 92 } 93 94 int crypto4xx_decrypt_noiv(struct skcipher_request *req) 95 { 96 return crypto4xx_crypt(req, 0, true); 97 } 98 99 int crypto4xx_decrypt_iv(struct skcipher_request *req) 100 { 101 return crypto4xx_crypt(req, AES_IV_SIZE, true); 102 } 103 104 /** 105 * AES Functions 106 */ 107 static int crypto4xx_setkey_aes(struct crypto_skcipher *cipher, 108 const u8 *key, 109 unsigned int keylen, 110 unsigned char cm, 111 u8 fb) 112 { 113 struct crypto4xx_ctx *ctx = crypto_skcipher_ctx(cipher); 114 struct dynamic_sa_ctl *sa; 115 int rc; 116 117 if (keylen != AES_KEYSIZE_256 && 118 keylen != AES_KEYSIZE_192 && keylen != AES_KEYSIZE_128) { 119 crypto_skcipher_set_flags(cipher, 120 CRYPTO_TFM_RES_BAD_KEY_LEN); 121 return -EINVAL; 122 } 123 124 /* Create SA */ 125 if (ctx->sa_in || ctx->sa_out) 126 crypto4xx_free_sa(ctx); 127 128 rc = crypto4xx_alloc_sa(ctx, SA_AES128_LEN + (keylen-16) / 4); 129 if (rc) 130 return rc; 131 132 /* Setup SA */ 133 sa = ctx->sa_in; 134 135 set_dynamic_sa_command_0(sa, SA_NOT_SAVE_HASH, (cm == CRYPTO_MODE_ECB ? 136 SA_NOT_SAVE_IV : SA_SAVE_IV), 137 SA_NOT_LOAD_HASH, (cm == CRYPTO_MODE_ECB ? 138 SA_LOAD_IV_FROM_SA : SA_LOAD_IV_FROM_STATE), 139 SA_NO_HEADER_PROC, SA_HASH_ALG_NULL, 140 SA_CIPHER_ALG_AES, SA_PAD_TYPE_ZERO, 141 SA_OP_GROUP_BASIC, SA_OPCODE_DECRYPT, 142 DIR_INBOUND); 143 144 set_dynamic_sa_command_1(sa, cm, SA_HASH_MODE_HASH, 145 fb, SA_EXTENDED_SN_OFF, 146 SA_SEQ_MASK_OFF, SA_MC_ENABLE, 147 SA_NOT_COPY_PAD, SA_NOT_COPY_PAYLOAD, 148 SA_NOT_COPY_HDR); 149 crypto4xx_memcpy_to_le32(get_dynamic_sa_key_field(sa), 150 key, keylen); 151 sa->sa_contents.w = SA_AES_CONTENTS | (keylen << 2); 152 sa->sa_command_1.bf.key_len = keylen >> 3; 153 154 memcpy(ctx->sa_out, ctx->sa_in, ctx->sa_len * 4); 155 sa = ctx->sa_out; 156 sa->sa_command_0.bf.dir = DIR_OUTBOUND; 157 /* 158 * SA_OPCODE_ENCRYPT is the same value as SA_OPCODE_DECRYPT. 159 * it's the DIR_(IN|OUT)BOUND that matters 160 */ 161 sa->sa_command_0.bf.opcode = SA_OPCODE_ENCRYPT; 162 163 return 0; 164 } 165 166 int crypto4xx_setkey_aes_cbc(struct crypto_skcipher *cipher, 167 const u8 *key, unsigned int keylen) 168 { 169 return crypto4xx_setkey_aes(cipher, key, keylen, CRYPTO_MODE_CBC, 170 CRYPTO_FEEDBACK_MODE_NO_FB); 171 } 172 173 int crypto4xx_setkey_aes_cfb(struct crypto_skcipher *cipher, 174 const u8 *key, unsigned int keylen) 175 { 176 return crypto4xx_setkey_aes(cipher, key, keylen, CRYPTO_MODE_CFB, 177 CRYPTO_FEEDBACK_MODE_128BIT_CFB); 178 } 179 180 int crypto4xx_setkey_aes_ecb(struct crypto_skcipher *cipher, 181 const u8 *key, unsigned int keylen) 182 { 183 return crypto4xx_setkey_aes(cipher, key, keylen, CRYPTO_MODE_ECB, 184 CRYPTO_FEEDBACK_MODE_NO_FB); 185 } 186 187 int crypto4xx_setkey_aes_ofb(struct crypto_skcipher *cipher, 188 const u8 *key, unsigned int keylen) 189 { 190 return crypto4xx_setkey_aes(cipher, key, keylen, CRYPTO_MODE_OFB, 191 CRYPTO_FEEDBACK_MODE_64BIT_OFB); 192 } 193 194 int crypto4xx_setkey_rfc3686(struct crypto_skcipher *cipher, 195 const u8 *key, unsigned int keylen) 196 { 197 struct crypto4xx_ctx *ctx = crypto_skcipher_ctx(cipher); 198 int rc; 199 200 rc = crypto4xx_setkey_aes(cipher, key, keylen - CTR_RFC3686_NONCE_SIZE, 201 CRYPTO_MODE_CTR, CRYPTO_FEEDBACK_MODE_NO_FB); 202 if (rc) 203 return rc; 204 205 ctx->iv_nonce = cpu_to_le32p((u32 *)&key[keylen - 206 CTR_RFC3686_NONCE_SIZE]); 207 208 return 0; 209 } 210 211 int crypto4xx_rfc3686_encrypt(struct skcipher_request *req) 212 { 213 struct crypto_skcipher *cipher = crypto_skcipher_reqtfm(req); 214 struct crypto4xx_ctx *ctx = crypto_skcipher_ctx(cipher); 215 __le32 iv[AES_IV_SIZE / 4] = { 216 ctx->iv_nonce, 217 cpu_to_le32p((u32 *) req->iv), 218 cpu_to_le32p((u32 *) (req->iv + 4)), 219 cpu_to_le32(1) }; 220 221 return crypto4xx_build_pd(&req->base, ctx, req->src, req->dst, 222 req->cryptlen, iv, AES_IV_SIZE, 223 ctx->sa_out, ctx->sa_len, 0, NULL); 224 } 225 226 int crypto4xx_rfc3686_decrypt(struct skcipher_request *req) 227 { 228 struct crypto_skcipher *cipher = crypto_skcipher_reqtfm(req); 229 struct crypto4xx_ctx *ctx = crypto_skcipher_ctx(cipher); 230 __le32 iv[AES_IV_SIZE / 4] = { 231 ctx->iv_nonce, 232 cpu_to_le32p((u32 *) req->iv), 233 cpu_to_le32p((u32 *) (req->iv + 4)), 234 cpu_to_le32(1) }; 235 236 return crypto4xx_build_pd(&req->base, ctx, req->src, req->dst, 237 req->cryptlen, iv, AES_IV_SIZE, 238 ctx->sa_out, ctx->sa_len, 0, NULL); 239 } 240 241 static int 242 crypto4xx_ctr_crypt(struct skcipher_request *req, bool encrypt) 243 { 244 struct crypto_skcipher *cipher = crypto_skcipher_reqtfm(req); 245 struct crypto4xx_ctx *ctx = crypto_skcipher_ctx(cipher); 246 size_t iv_len = crypto_skcipher_ivsize(cipher); 247 unsigned int counter = be32_to_cpup((__be32 *)(req->iv + iv_len - 4)); 248 unsigned int nblks = ALIGN(req->cryptlen, AES_BLOCK_SIZE) / 249 AES_BLOCK_SIZE; 250 251 /* 252 * The hardware uses only the last 32-bits as the counter while the 253 * kernel tests (aes_ctr_enc_tv_template[4] for example) expect that 254 * the whole IV is a counter. So fallback if the counter is going to 255 * overlow. 256 */ 257 if (counter + nblks < counter) { 258 SYNC_SKCIPHER_REQUEST_ON_STACK(subreq, ctx->sw_cipher.cipher); 259 int ret; 260 261 skcipher_request_set_sync_tfm(subreq, ctx->sw_cipher.cipher); 262 skcipher_request_set_callback(subreq, req->base.flags, 263 NULL, NULL); 264 skcipher_request_set_crypt(subreq, req->src, req->dst, 265 req->cryptlen, req->iv); 266 ret = encrypt ? crypto_skcipher_encrypt(subreq) 267 : crypto_skcipher_decrypt(subreq); 268 skcipher_request_zero(subreq); 269 return ret; 270 } 271 272 return encrypt ? crypto4xx_encrypt_iv(req) 273 : crypto4xx_decrypt_iv(req); 274 } 275 276 static int crypto4xx_sk_setup_fallback(struct crypto4xx_ctx *ctx, 277 struct crypto_skcipher *cipher, 278 const u8 *key, 279 unsigned int keylen) 280 { 281 int rc; 282 283 crypto_sync_skcipher_clear_flags(ctx->sw_cipher.cipher, 284 CRYPTO_TFM_REQ_MASK); 285 crypto_sync_skcipher_set_flags(ctx->sw_cipher.cipher, 286 crypto_skcipher_get_flags(cipher) & CRYPTO_TFM_REQ_MASK); 287 rc = crypto_sync_skcipher_setkey(ctx->sw_cipher.cipher, key, keylen); 288 crypto_skcipher_clear_flags(cipher, CRYPTO_TFM_RES_MASK); 289 crypto_skcipher_set_flags(cipher, 290 crypto_sync_skcipher_get_flags(ctx->sw_cipher.cipher) & 291 CRYPTO_TFM_RES_MASK); 292 293 return rc; 294 } 295 296 int crypto4xx_setkey_aes_ctr(struct crypto_skcipher *cipher, 297 const u8 *key, unsigned int keylen) 298 { 299 struct crypto4xx_ctx *ctx = crypto_skcipher_ctx(cipher); 300 int rc; 301 302 rc = crypto4xx_sk_setup_fallback(ctx, cipher, key, keylen); 303 if (rc) 304 return rc; 305 306 return crypto4xx_setkey_aes(cipher, key, keylen, 307 CRYPTO_MODE_CTR, CRYPTO_FEEDBACK_MODE_NO_FB); 308 } 309 310 int crypto4xx_encrypt_ctr(struct skcipher_request *req) 311 { 312 return crypto4xx_ctr_crypt(req, true); 313 } 314 315 int crypto4xx_decrypt_ctr(struct skcipher_request *req) 316 { 317 return crypto4xx_ctr_crypt(req, false); 318 } 319 320 static inline bool crypto4xx_aead_need_fallback(struct aead_request *req, 321 unsigned int len, 322 bool is_ccm, bool decrypt) 323 { 324 struct crypto_aead *aead = crypto_aead_reqtfm(req); 325 326 /* authsize has to be a multiple of 4 */ 327 if (aead->authsize & 3) 328 return true; 329 330 /* 331 * hardware does not handle cases where plaintext 332 * is less than a block. 333 */ 334 if (len < AES_BLOCK_SIZE) 335 return true; 336 337 /* assoc len needs to be a multiple of 4 and <= 1020 */ 338 if (req->assoclen & 0x3 || req->assoclen > 1020) 339 return true; 340 341 /* CCM supports only counter field length of 2 and 4 bytes */ 342 if (is_ccm && !(req->iv[0] == 1 || req->iv[0] == 3)) 343 return true; 344 345 return false; 346 } 347 348 static int crypto4xx_aead_fallback(struct aead_request *req, 349 struct crypto4xx_ctx *ctx, bool do_decrypt) 350 { 351 struct aead_request *subreq = aead_request_ctx(req); 352 353 aead_request_set_tfm(subreq, ctx->sw_cipher.aead); 354 aead_request_set_callback(subreq, req->base.flags, 355 req->base.complete, req->base.data); 356 aead_request_set_crypt(subreq, req->src, req->dst, req->cryptlen, 357 req->iv); 358 aead_request_set_ad(subreq, req->assoclen); 359 return do_decrypt ? crypto_aead_decrypt(subreq) : 360 crypto_aead_encrypt(subreq); 361 } 362 363 static int crypto4xx_aead_setup_fallback(struct crypto4xx_ctx *ctx, 364 struct crypto_aead *cipher, 365 const u8 *key, 366 unsigned int keylen) 367 { 368 int rc; 369 370 crypto_aead_clear_flags(ctx->sw_cipher.aead, CRYPTO_TFM_REQ_MASK); 371 crypto_aead_set_flags(ctx->sw_cipher.aead, 372 crypto_aead_get_flags(cipher) & CRYPTO_TFM_REQ_MASK); 373 rc = crypto_aead_setkey(ctx->sw_cipher.aead, key, keylen); 374 crypto_aead_clear_flags(cipher, CRYPTO_TFM_RES_MASK); 375 crypto_aead_set_flags(cipher, 376 crypto_aead_get_flags(ctx->sw_cipher.aead) & 377 CRYPTO_TFM_RES_MASK); 378 379 return rc; 380 } 381 382 /** 383 * AES-CCM Functions 384 */ 385 386 int crypto4xx_setkey_aes_ccm(struct crypto_aead *cipher, const u8 *key, 387 unsigned int keylen) 388 { 389 struct crypto_tfm *tfm = crypto_aead_tfm(cipher); 390 struct crypto4xx_ctx *ctx = crypto_tfm_ctx(tfm); 391 struct dynamic_sa_ctl *sa; 392 int rc = 0; 393 394 rc = crypto4xx_aead_setup_fallback(ctx, cipher, key, keylen); 395 if (rc) 396 return rc; 397 398 if (ctx->sa_in || ctx->sa_out) 399 crypto4xx_free_sa(ctx); 400 401 rc = crypto4xx_alloc_sa(ctx, SA_AES128_CCM_LEN + (keylen - 16) / 4); 402 if (rc) 403 return rc; 404 405 /* Setup SA */ 406 sa = (struct dynamic_sa_ctl *) ctx->sa_in; 407 sa->sa_contents.w = SA_AES_CCM_CONTENTS | (keylen << 2); 408 409 set_dynamic_sa_command_0(sa, SA_SAVE_HASH, SA_NOT_SAVE_IV, 410 SA_LOAD_HASH_FROM_SA, SA_LOAD_IV_FROM_STATE, 411 SA_NO_HEADER_PROC, SA_HASH_ALG_CBC_MAC, 412 SA_CIPHER_ALG_AES, 413 SA_PAD_TYPE_ZERO, SA_OP_GROUP_BASIC, 414 SA_OPCODE_HASH_DECRYPT, DIR_INBOUND); 415 416 set_dynamic_sa_command_1(sa, CRYPTO_MODE_CTR, SA_HASH_MODE_HASH, 417 CRYPTO_FEEDBACK_MODE_NO_FB, SA_EXTENDED_SN_OFF, 418 SA_SEQ_MASK_OFF, SA_MC_ENABLE, 419 SA_NOT_COPY_PAD, SA_COPY_PAYLOAD, 420 SA_NOT_COPY_HDR); 421 422 sa->sa_command_1.bf.key_len = keylen >> 3; 423 424 crypto4xx_memcpy_to_le32(get_dynamic_sa_key_field(sa), key, keylen); 425 426 memcpy(ctx->sa_out, ctx->sa_in, ctx->sa_len * 4); 427 sa = (struct dynamic_sa_ctl *) ctx->sa_out; 428 429 set_dynamic_sa_command_0(sa, SA_SAVE_HASH, SA_NOT_SAVE_IV, 430 SA_LOAD_HASH_FROM_SA, SA_LOAD_IV_FROM_STATE, 431 SA_NO_HEADER_PROC, SA_HASH_ALG_CBC_MAC, 432 SA_CIPHER_ALG_AES, 433 SA_PAD_TYPE_ZERO, SA_OP_GROUP_BASIC, 434 SA_OPCODE_ENCRYPT_HASH, DIR_OUTBOUND); 435 436 set_dynamic_sa_command_1(sa, CRYPTO_MODE_CTR, SA_HASH_MODE_HASH, 437 CRYPTO_FEEDBACK_MODE_NO_FB, SA_EXTENDED_SN_OFF, 438 SA_SEQ_MASK_OFF, SA_MC_ENABLE, 439 SA_COPY_PAD, SA_COPY_PAYLOAD, 440 SA_NOT_COPY_HDR); 441 442 sa->sa_command_1.bf.key_len = keylen >> 3; 443 return 0; 444 } 445 446 static int crypto4xx_crypt_aes_ccm(struct aead_request *req, bool decrypt) 447 { 448 struct crypto4xx_ctx *ctx = crypto_tfm_ctx(req->base.tfm); 449 struct crypto4xx_aead_reqctx *rctx = aead_request_ctx(req); 450 struct crypto_aead *aead = crypto_aead_reqtfm(req); 451 __le32 iv[16]; 452 u32 tmp_sa[SA_AES128_CCM_LEN + 4]; 453 struct dynamic_sa_ctl *sa = (struct dynamic_sa_ctl *)tmp_sa; 454 unsigned int len = req->cryptlen; 455 456 if (decrypt) 457 len -= crypto_aead_authsize(aead); 458 459 if (crypto4xx_aead_need_fallback(req, len, true, decrypt)) 460 return crypto4xx_aead_fallback(req, ctx, decrypt); 461 462 memcpy(tmp_sa, decrypt ? ctx->sa_in : ctx->sa_out, ctx->sa_len * 4); 463 sa->sa_command_0.bf.digest_len = crypto_aead_authsize(aead) >> 2; 464 465 if (req->iv[0] == 1) { 466 /* CRYPTO_MODE_AES_ICM */ 467 sa->sa_command_1.bf.crypto_mode9_8 = 1; 468 } 469 470 iv[3] = cpu_to_le32(0); 471 crypto4xx_memcpy_to_le32(iv, req->iv, 16 - (req->iv[0] + 1)); 472 473 return crypto4xx_build_pd(&req->base, ctx, req->src, req->dst, 474 len, iv, sizeof(iv), 475 sa, ctx->sa_len, req->assoclen, rctx->dst); 476 } 477 478 int crypto4xx_encrypt_aes_ccm(struct aead_request *req) 479 { 480 return crypto4xx_crypt_aes_ccm(req, false); 481 } 482 483 int crypto4xx_decrypt_aes_ccm(struct aead_request *req) 484 { 485 return crypto4xx_crypt_aes_ccm(req, true); 486 } 487 488 int crypto4xx_setauthsize_aead(struct crypto_aead *cipher, 489 unsigned int authsize) 490 { 491 struct crypto_tfm *tfm = crypto_aead_tfm(cipher); 492 struct crypto4xx_ctx *ctx = crypto_tfm_ctx(tfm); 493 494 return crypto_aead_setauthsize(ctx->sw_cipher.aead, authsize); 495 } 496 497 /** 498 * AES-GCM Functions 499 */ 500 501 static int crypto4xx_aes_gcm_validate_keylen(unsigned int keylen) 502 { 503 switch (keylen) { 504 case 16: 505 case 24: 506 case 32: 507 return 0; 508 default: 509 return -EINVAL; 510 } 511 } 512 513 static int crypto4xx_compute_gcm_hash_key_sw(__le32 *hash_start, const u8 *key, 514 unsigned int keylen) 515 { 516 struct crypto_cipher *aes_tfm = NULL; 517 uint8_t src[16] = { 0 }; 518 int rc = 0; 519 520 aes_tfm = crypto_alloc_cipher("aes", 0, CRYPTO_ALG_NEED_FALLBACK); 521 if (IS_ERR(aes_tfm)) { 522 rc = PTR_ERR(aes_tfm); 523 pr_warn("could not load aes cipher driver: %d\n", rc); 524 return rc; 525 } 526 527 rc = crypto_cipher_setkey(aes_tfm, key, keylen); 528 if (rc) { 529 pr_err("setkey() failed: %d\n", rc); 530 goto out; 531 } 532 533 crypto_cipher_encrypt_one(aes_tfm, src, src); 534 crypto4xx_memcpy_to_le32(hash_start, src, 16); 535 out: 536 crypto_free_cipher(aes_tfm); 537 return rc; 538 } 539 540 int crypto4xx_setkey_aes_gcm(struct crypto_aead *cipher, 541 const u8 *key, unsigned int keylen) 542 { 543 struct crypto_tfm *tfm = crypto_aead_tfm(cipher); 544 struct crypto4xx_ctx *ctx = crypto_tfm_ctx(tfm); 545 struct dynamic_sa_ctl *sa; 546 int rc = 0; 547 548 if (crypto4xx_aes_gcm_validate_keylen(keylen) != 0) { 549 crypto_aead_set_flags(cipher, CRYPTO_TFM_RES_BAD_KEY_LEN); 550 return -EINVAL; 551 } 552 553 rc = crypto4xx_aead_setup_fallback(ctx, cipher, key, keylen); 554 if (rc) 555 return rc; 556 557 if (ctx->sa_in || ctx->sa_out) 558 crypto4xx_free_sa(ctx); 559 560 rc = crypto4xx_alloc_sa(ctx, SA_AES128_GCM_LEN + (keylen - 16) / 4); 561 if (rc) 562 return rc; 563 564 sa = (struct dynamic_sa_ctl *) ctx->sa_in; 565 566 sa->sa_contents.w = SA_AES_GCM_CONTENTS | (keylen << 2); 567 set_dynamic_sa_command_0(sa, SA_SAVE_HASH, SA_NOT_SAVE_IV, 568 SA_LOAD_HASH_FROM_SA, SA_LOAD_IV_FROM_STATE, 569 SA_NO_HEADER_PROC, SA_HASH_ALG_GHASH, 570 SA_CIPHER_ALG_AES, SA_PAD_TYPE_ZERO, 571 SA_OP_GROUP_BASIC, SA_OPCODE_HASH_DECRYPT, 572 DIR_INBOUND); 573 set_dynamic_sa_command_1(sa, CRYPTO_MODE_CTR, SA_HASH_MODE_HASH, 574 CRYPTO_FEEDBACK_MODE_NO_FB, SA_EXTENDED_SN_OFF, 575 SA_SEQ_MASK_ON, SA_MC_DISABLE, 576 SA_NOT_COPY_PAD, SA_COPY_PAYLOAD, 577 SA_NOT_COPY_HDR); 578 579 sa->sa_command_1.bf.key_len = keylen >> 3; 580 581 crypto4xx_memcpy_to_le32(get_dynamic_sa_key_field(sa), 582 key, keylen); 583 584 rc = crypto4xx_compute_gcm_hash_key_sw(get_dynamic_sa_inner_digest(sa), 585 key, keylen); 586 if (rc) { 587 pr_err("GCM hash key setting failed = %d\n", rc); 588 goto err; 589 } 590 591 memcpy(ctx->sa_out, ctx->sa_in, ctx->sa_len * 4); 592 sa = (struct dynamic_sa_ctl *) ctx->sa_out; 593 sa->sa_command_0.bf.dir = DIR_OUTBOUND; 594 sa->sa_command_0.bf.opcode = SA_OPCODE_ENCRYPT_HASH; 595 596 return 0; 597 err: 598 crypto4xx_free_sa(ctx); 599 return rc; 600 } 601 602 static inline int crypto4xx_crypt_aes_gcm(struct aead_request *req, 603 bool decrypt) 604 { 605 struct crypto4xx_ctx *ctx = crypto_tfm_ctx(req->base.tfm); 606 struct crypto4xx_aead_reqctx *rctx = aead_request_ctx(req); 607 __le32 iv[4]; 608 unsigned int len = req->cryptlen; 609 610 if (decrypt) 611 len -= crypto_aead_authsize(crypto_aead_reqtfm(req)); 612 613 if (crypto4xx_aead_need_fallback(req, len, false, decrypt)) 614 return crypto4xx_aead_fallback(req, ctx, decrypt); 615 616 crypto4xx_memcpy_to_le32(iv, req->iv, GCM_AES_IV_SIZE); 617 iv[3] = cpu_to_le32(1); 618 619 return crypto4xx_build_pd(&req->base, ctx, req->src, req->dst, 620 len, iv, sizeof(iv), 621 decrypt ? ctx->sa_in : ctx->sa_out, 622 ctx->sa_len, req->assoclen, rctx->dst); 623 } 624 625 int crypto4xx_encrypt_aes_gcm(struct aead_request *req) 626 { 627 return crypto4xx_crypt_aes_gcm(req, false); 628 } 629 630 int crypto4xx_decrypt_aes_gcm(struct aead_request *req) 631 { 632 return crypto4xx_crypt_aes_gcm(req, true); 633 } 634 635 /** 636 * HASH SHA1 Functions 637 */ 638 static int crypto4xx_hash_alg_init(struct crypto_tfm *tfm, 639 unsigned int sa_len, 640 unsigned char ha, 641 unsigned char hm) 642 { 643 struct crypto_alg *alg = tfm->__crt_alg; 644 struct crypto4xx_alg *my_alg; 645 struct crypto4xx_ctx *ctx = crypto_tfm_ctx(tfm); 646 struct dynamic_sa_hash160 *sa; 647 int rc; 648 649 my_alg = container_of(__crypto_ahash_alg(alg), struct crypto4xx_alg, 650 alg.u.hash); 651 ctx->dev = my_alg->dev; 652 653 /* Create SA */ 654 if (ctx->sa_in || ctx->sa_out) 655 crypto4xx_free_sa(ctx); 656 657 rc = crypto4xx_alloc_sa(ctx, sa_len); 658 if (rc) 659 return rc; 660 661 crypto_ahash_set_reqsize(__crypto_ahash_cast(tfm), 662 sizeof(struct crypto4xx_ctx)); 663 sa = (struct dynamic_sa_hash160 *)ctx->sa_in; 664 set_dynamic_sa_command_0(&sa->ctrl, SA_SAVE_HASH, SA_NOT_SAVE_IV, 665 SA_NOT_LOAD_HASH, SA_LOAD_IV_FROM_SA, 666 SA_NO_HEADER_PROC, ha, SA_CIPHER_ALG_NULL, 667 SA_PAD_TYPE_ZERO, SA_OP_GROUP_BASIC, 668 SA_OPCODE_HASH, DIR_INBOUND); 669 set_dynamic_sa_command_1(&sa->ctrl, 0, SA_HASH_MODE_HASH, 670 CRYPTO_FEEDBACK_MODE_NO_FB, SA_EXTENDED_SN_OFF, 671 SA_SEQ_MASK_OFF, SA_MC_ENABLE, 672 SA_NOT_COPY_PAD, SA_NOT_COPY_PAYLOAD, 673 SA_NOT_COPY_HDR); 674 /* Need to zero hash digest in SA */ 675 memset(sa->inner_digest, 0, sizeof(sa->inner_digest)); 676 memset(sa->outer_digest, 0, sizeof(sa->outer_digest)); 677 678 return 0; 679 } 680 681 int crypto4xx_hash_init(struct ahash_request *req) 682 { 683 struct crypto4xx_ctx *ctx = crypto_tfm_ctx(req->base.tfm); 684 int ds; 685 struct dynamic_sa_ctl *sa; 686 687 sa = ctx->sa_in; 688 ds = crypto_ahash_digestsize( 689 __crypto_ahash_cast(req->base.tfm)); 690 sa->sa_command_0.bf.digest_len = ds >> 2; 691 sa->sa_command_0.bf.load_hash_state = SA_LOAD_HASH_FROM_SA; 692 693 return 0; 694 } 695 696 int crypto4xx_hash_update(struct ahash_request *req) 697 { 698 struct crypto_ahash *ahash = crypto_ahash_reqtfm(req); 699 struct crypto4xx_ctx *ctx = crypto_tfm_ctx(req->base.tfm); 700 struct scatterlist dst; 701 unsigned int ds = crypto_ahash_digestsize(ahash); 702 703 sg_init_one(&dst, req->result, ds); 704 705 return crypto4xx_build_pd(&req->base, ctx, req->src, &dst, 706 req->nbytes, NULL, 0, ctx->sa_in, 707 ctx->sa_len, 0, NULL); 708 } 709 710 int crypto4xx_hash_final(struct ahash_request *req) 711 { 712 return 0; 713 } 714 715 int crypto4xx_hash_digest(struct ahash_request *req) 716 { 717 struct crypto_ahash *ahash = crypto_ahash_reqtfm(req); 718 struct crypto4xx_ctx *ctx = crypto_tfm_ctx(req->base.tfm); 719 struct scatterlist dst; 720 unsigned int ds = crypto_ahash_digestsize(ahash); 721 722 sg_init_one(&dst, req->result, ds); 723 724 return crypto4xx_build_pd(&req->base, ctx, req->src, &dst, 725 req->nbytes, NULL, 0, ctx->sa_in, 726 ctx->sa_len, 0, NULL); 727 } 728 729 /** 730 * SHA1 Algorithm 731 */ 732 int crypto4xx_sha1_alg_init(struct crypto_tfm *tfm) 733 { 734 return crypto4xx_hash_alg_init(tfm, SA_HASH160_LEN, SA_HASH_ALG_SHA1, 735 SA_HASH_MODE_HASH); 736 } 737