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 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 && 132 keylen != AES_KEYSIZE_192 && keylen != AES_KEYSIZE_128) { 133 crypto_skcipher_set_flags(cipher, 134 CRYPTO_TFM_RES_BAD_KEY_LEN); 135 return -EINVAL; 136 } 137 138 /* Create SA */ 139 if (ctx->sa_in || ctx->sa_out) 140 crypto4xx_free_sa(ctx); 141 142 rc = crypto4xx_alloc_sa(ctx, SA_AES128_LEN + (keylen-16) / 4); 143 if (rc) 144 return rc; 145 146 /* Setup SA */ 147 sa = ctx->sa_in; 148 149 set_dynamic_sa_command_0(sa, SA_NOT_SAVE_HASH, (cm == CRYPTO_MODE_ECB ? 150 SA_NOT_SAVE_IV : SA_SAVE_IV), 151 SA_NOT_LOAD_HASH, (cm == CRYPTO_MODE_ECB ? 152 SA_LOAD_IV_FROM_SA : SA_LOAD_IV_FROM_STATE), 153 SA_NO_HEADER_PROC, SA_HASH_ALG_NULL, 154 SA_CIPHER_ALG_AES, SA_PAD_TYPE_ZERO, 155 SA_OP_GROUP_BASIC, SA_OPCODE_DECRYPT, 156 DIR_INBOUND); 157 158 set_dynamic_sa_command_1(sa, cm, SA_HASH_MODE_HASH, 159 fb, SA_EXTENDED_SN_OFF, 160 SA_SEQ_MASK_OFF, SA_MC_ENABLE, 161 SA_NOT_COPY_PAD, SA_NOT_COPY_PAYLOAD, 162 SA_NOT_COPY_HDR); 163 crypto4xx_memcpy_to_le32(get_dynamic_sa_key_field(sa), 164 key, keylen); 165 sa->sa_contents.w = SA_AES_CONTENTS | (keylen << 2); 166 sa->sa_command_1.bf.key_len = keylen >> 3; 167 168 memcpy(ctx->sa_out, ctx->sa_in, ctx->sa_len * 4); 169 sa = ctx->sa_out; 170 sa->sa_command_0.bf.dir = DIR_OUTBOUND; 171 /* 172 * SA_OPCODE_ENCRYPT is the same value as SA_OPCODE_DECRYPT. 173 * it's the DIR_(IN|OUT)BOUND that matters 174 */ 175 sa->sa_command_0.bf.opcode = SA_OPCODE_ENCRYPT; 176 177 return 0; 178 } 179 180 int crypto4xx_setkey_aes_cbc(struct crypto_skcipher *cipher, 181 const u8 *key, unsigned int keylen) 182 { 183 return crypto4xx_setkey_aes(cipher, key, keylen, CRYPTO_MODE_CBC, 184 CRYPTO_FEEDBACK_MODE_NO_FB); 185 } 186 187 int crypto4xx_setkey_aes_cfb(struct crypto_skcipher *cipher, 188 const u8 *key, unsigned int keylen) 189 { 190 return crypto4xx_setkey_aes(cipher, key, keylen, CRYPTO_MODE_CFB, 191 CRYPTO_FEEDBACK_MODE_128BIT_CFB); 192 } 193 194 int crypto4xx_setkey_aes_ecb(struct crypto_skcipher *cipher, 195 const u8 *key, unsigned int keylen) 196 { 197 return crypto4xx_setkey_aes(cipher, key, keylen, CRYPTO_MODE_ECB, 198 CRYPTO_FEEDBACK_MODE_NO_FB); 199 } 200 201 int crypto4xx_setkey_aes_ofb(struct crypto_skcipher *cipher, 202 const u8 *key, unsigned int keylen) 203 { 204 return crypto4xx_setkey_aes(cipher, key, keylen, CRYPTO_MODE_OFB, 205 CRYPTO_FEEDBACK_MODE_64BIT_OFB); 206 } 207 208 int crypto4xx_setkey_rfc3686(struct crypto_skcipher *cipher, 209 const u8 *key, unsigned int keylen) 210 { 211 struct crypto4xx_ctx *ctx = crypto_skcipher_ctx(cipher); 212 int rc; 213 214 rc = crypto4xx_setkey_aes(cipher, key, keylen - CTR_RFC3686_NONCE_SIZE, 215 CRYPTO_MODE_CTR, CRYPTO_FEEDBACK_MODE_NO_FB); 216 if (rc) 217 return rc; 218 219 ctx->iv_nonce = cpu_to_le32p((u32 *)&key[keylen - 220 CTR_RFC3686_NONCE_SIZE]); 221 222 return 0; 223 } 224 225 int crypto4xx_rfc3686_encrypt(struct skcipher_request *req) 226 { 227 struct crypto_skcipher *cipher = crypto_skcipher_reqtfm(req); 228 struct crypto4xx_ctx *ctx = crypto_skcipher_ctx(cipher); 229 __le32 iv[AES_IV_SIZE / 4] = { 230 ctx->iv_nonce, 231 cpu_to_le32p((u32 *) req->iv), 232 cpu_to_le32p((u32 *) (req->iv + 4)), 233 cpu_to_le32(1) }; 234 235 return crypto4xx_build_pd(&req->base, ctx, req->src, req->dst, 236 req->cryptlen, iv, AES_IV_SIZE, 237 ctx->sa_out, ctx->sa_len, 0, NULL); 238 } 239 240 int crypto4xx_rfc3686_decrypt(struct skcipher_request *req) 241 { 242 struct crypto_skcipher *cipher = crypto_skcipher_reqtfm(req); 243 struct crypto4xx_ctx *ctx = crypto_skcipher_ctx(cipher); 244 __le32 iv[AES_IV_SIZE / 4] = { 245 ctx->iv_nonce, 246 cpu_to_le32p((u32 *) req->iv), 247 cpu_to_le32p((u32 *) (req->iv + 4)), 248 cpu_to_le32(1) }; 249 250 return crypto4xx_build_pd(&req->base, ctx, req->src, req->dst, 251 req->cryptlen, iv, AES_IV_SIZE, 252 ctx->sa_out, ctx->sa_len, 0, NULL); 253 } 254 255 static int 256 crypto4xx_ctr_crypt(struct skcipher_request *req, bool encrypt) 257 { 258 struct crypto_skcipher *cipher = crypto_skcipher_reqtfm(req); 259 struct crypto4xx_ctx *ctx = crypto_skcipher_ctx(cipher); 260 size_t iv_len = crypto_skcipher_ivsize(cipher); 261 unsigned int counter = be32_to_cpup((__be32 *)(req->iv + iv_len - 4)); 262 unsigned int nblks = ALIGN(req->cryptlen, AES_BLOCK_SIZE) / 263 AES_BLOCK_SIZE; 264 265 /* 266 * The hardware uses only the last 32-bits as the counter while the 267 * kernel tests (aes_ctr_enc_tv_template[4] for example) expect that 268 * the whole IV is a counter. So fallback if the counter is going to 269 * overlow. 270 */ 271 if (counter + nblks < counter) { 272 SYNC_SKCIPHER_REQUEST_ON_STACK(subreq, ctx->sw_cipher.cipher); 273 int ret; 274 275 skcipher_request_set_sync_tfm(subreq, ctx->sw_cipher.cipher); 276 skcipher_request_set_callback(subreq, req->base.flags, 277 NULL, NULL); 278 skcipher_request_set_crypt(subreq, req->src, req->dst, 279 req->cryptlen, req->iv); 280 ret = encrypt ? crypto_skcipher_encrypt(subreq) 281 : crypto_skcipher_decrypt(subreq); 282 skcipher_request_zero(subreq); 283 return ret; 284 } 285 286 return encrypt ? crypto4xx_encrypt_iv_stream(req) 287 : crypto4xx_decrypt_iv_stream(req); 288 } 289 290 static int crypto4xx_sk_setup_fallback(struct crypto4xx_ctx *ctx, 291 struct crypto_skcipher *cipher, 292 const u8 *key, 293 unsigned int keylen) 294 { 295 int rc; 296 297 crypto_sync_skcipher_clear_flags(ctx->sw_cipher.cipher, 298 CRYPTO_TFM_REQ_MASK); 299 crypto_sync_skcipher_set_flags(ctx->sw_cipher.cipher, 300 crypto_skcipher_get_flags(cipher) & CRYPTO_TFM_REQ_MASK); 301 rc = crypto_sync_skcipher_setkey(ctx->sw_cipher.cipher, key, keylen); 302 crypto_skcipher_clear_flags(cipher, CRYPTO_TFM_RES_MASK); 303 crypto_skcipher_set_flags(cipher, 304 crypto_sync_skcipher_get_flags(ctx->sw_cipher.cipher) & 305 CRYPTO_TFM_RES_MASK); 306 307 return rc; 308 } 309 310 int crypto4xx_setkey_aes_ctr(struct crypto_skcipher *cipher, 311 const u8 *key, unsigned int keylen) 312 { 313 struct crypto4xx_ctx *ctx = crypto_skcipher_ctx(cipher); 314 int rc; 315 316 rc = crypto4xx_sk_setup_fallback(ctx, cipher, key, keylen); 317 if (rc) 318 return rc; 319 320 return crypto4xx_setkey_aes(cipher, key, keylen, 321 CRYPTO_MODE_CTR, CRYPTO_FEEDBACK_MODE_NO_FB); 322 } 323 324 int crypto4xx_encrypt_ctr(struct skcipher_request *req) 325 { 326 return crypto4xx_ctr_crypt(req, true); 327 } 328 329 int crypto4xx_decrypt_ctr(struct skcipher_request *req) 330 { 331 return crypto4xx_ctr_crypt(req, false); 332 } 333 334 static inline bool crypto4xx_aead_need_fallback(struct aead_request *req, 335 unsigned int len, 336 bool is_ccm, bool decrypt) 337 { 338 struct crypto_aead *aead = crypto_aead_reqtfm(req); 339 340 /* authsize has to be a multiple of 4 */ 341 if (aead->authsize & 3) 342 return true; 343 344 /* 345 * hardware does not handle cases where plaintext 346 * is less than a block. 347 */ 348 if (len < AES_BLOCK_SIZE) 349 return true; 350 351 /* assoc len needs to be a multiple of 4 and <= 1020 */ 352 if (req->assoclen & 0x3 || req->assoclen > 1020) 353 return true; 354 355 /* CCM supports only counter field length of 2 and 4 bytes */ 356 if (is_ccm && !(req->iv[0] == 1 || req->iv[0] == 3)) 357 return true; 358 359 return false; 360 } 361 362 static int crypto4xx_aead_fallback(struct aead_request *req, 363 struct crypto4xx_ctx *ctx, bool do_decrypt) 364 { 365 struct aead_request *subreq = aead_request_ctx(req); 366 367 aead_request_set_tfm(subreq, ctx->sw_cipher.aead); 368 aead_request_set_callback(subreq, req->base.flags, 369 req->base.complete, req->base.data); 370 aead_request_set_crypt(subreq, req->src, req->dst, req->cryptlen, 371 req->iv); 372 aead_request_set_ad(subreq, req->assoclen); 373 return do_decrypt ? crypto_aead_decrypt(subreq) : 374 crypto_aead_encrypt(subreq); 375 } 376 377 static int crypto4xx_aead_setup_fallback(struct crypto4xx_ctx *ctx, 378 struct crypto_aead *cipher, 379 const u8 *key, 380 unsigned int keylen) 381 { 382 int rc; 383 384 crypto_aead_clear_flags(ctx->sw_cipher.aead, CRYPTO_TFM_REQ_MASK); 385 crypto_aead_set_flags(ctx->sw_cipher.aead, 386 crypto_aead_get_flags(cipher) & CRYPTO_TFM_REQ_MASK); 387 rc = crypto_aead_setkey(ctx->sw_cipher.aead, key, keylen); 388 crypto_aead_clear_flags(cipher, CRYPTO_TFM_RES_MASK); 389 crypto_aead_set_flags(cipher, 390 crypto_aead_get_flags(ctx->sw_cipher.aead) & 391 CRYPTO_TFM_RES_MASK); 392 393 return rc; 394 } 395 396 /** 397 * AES-CCM Functions 398 */ 399 400 int crypto4xx_setkey_aes_ccm(struct crypto_aead *cipher, const u8 *key, 401 unsigned int keylen) 402 { 403 struct crypto_tfm *tfm = crypto_aead_tfm(cipher); 404 struct crypto4xx_ctx *ctx = crypto_tfm_ctx(tfm); 405 struct dynamic_sa_ctl *sa; 406 int rc = 0; 407 408 rc = crypto4xx_aead_setup_fallback(ctx, cipher, key, keylen); 409 if (rc) 410 return rc; 411 412 if (ctx->sa_in || ctx->sa_out) 413 crypto4xx_free_sa(ctx); 414 415 rc = crypto4xx_alloc_sa(ctx, SA_AES128_CCM_LEN + (keylen - 16) / 4); 416 if (rc) 417 return rc; 418 419 /* Setup SA */ 420 sa = (struct dynamic_sa_ctl *) ctx->sa_in; 421 sa->sa_contents.w = SA_AES_CCM_CONTENTS | (keylen << 2); 422 423 set_dynamic_sa_command_0(sa, SA_SAVE_HASH, SA_NOT_SAVE_IV, 424 SA_LOAD_HASH_FROM_SA, SA_LOAD_IV_FROM_STATE, 425 SA_NO_HEADER_PROC, SA_HASH_ALG_CBC_MAC, 426 SA_CIPHER_ALG_AES, 427 SA_PAD_TYPE_ZERO, SA_OP_GROUP_BASIC, 428 SA_OPCODE_HASH_DECRYPT, DIR_INBOUND); 429 430 set_dynamic_sa_command_1(sa, CRYPTO_MODE_CTR, SA_HASH_MODE_HASH, 431 CRYPTO_FEEDBACK_MODE_NO_FB, SA_EXTENDED_SN_OFF, 432 SA_SEQ_MASK_OFF, SA_MC_ENABLE, 433 SA_NOT_COPY_PAD, SA_COPY_PAYLOAD, 434 SA_NOT_COPY_HDR); 435 436 sa->sa_command_1.bf.key_len = keylen >> 3; 437 438 crypto4xx_memcpy_to_le32(get_dynamic_sa_key_field(sa), key, keylen); 439 440 memcpy(ctx->sa_out, ctx->sa_in, ctx->sa_len * 4); 441 sa = (struct dynamic_sa_ctl *) ctx->sa_out; 442 443 set_dynamic_sa_command_0(sa, SA_SAVE_HASH, SA_NOT_SAVE_IV, 444 SA_LOAD_HASH_FROM_SA, SA_LOAD_IV_FROM_STATE, 445 SA_NO_HEADER_PROC, SA_HASH_ALG_CBC_MAC, 446 SA_CIPHER_ALG_AES, 447 SA_PAD_TYPE_ZERO, SA_OP_GROUP_BASIC, 448 SA_OPCODE_ENCRYPT_HASH, DIR_OUTBOUND); 449 450 set_dynamic_sa_command_1(sa, CRYPTO_MODE_CTR, SA_HASH_MODE_HASH, 451 CRYPTO_FEEDBACK_MODE_NO_FB, SA_EXTENDED_SN_OFF, 452 SA_SEQ_MASK_OFF, SA_MC_ENABLE, 453 SA_COPY_PAD, SA_COPY_PAYLOAD, 454 SA_NOT_COPY_HDR); 455 456 sa->sa_command_1.bf.key_len = keylen >> 3; 457 return 0; 458 } 459 460 static int crypto4xx_crypt_aes_ccm(struct aead_request *req, bool decrypt) 461 { 462 struct crypto4xx_ctx *ctx = crypto_tfm_ctx(req->base.tfm); 463 struct crypto4xx_aead_reqctx *rctx = aead_request_ctx(req); 464 struct crypto_aead *aead = crypto_aead_reqtfm(req); 465 __le32 iv[16]; 466 u32 tmp_sa[SA_AES128_CCM_LEN + 4]; 467 struct dynamic_sa_ctl *sa = (struct dynamic_sa_ctl *)tmp_sa; 468 unsigned int len = req->cryptlen; 469 470 if (decrypt) 471 len -= crypto_aead_authsize(aead); 472 473 if (crypto4xx_aead_need_fallback(req, len, true, decrypt)) 474 return crypto4xx_aead_fallback(req, ctx, decrypt); 475 476 memcpy(tmp_sa, decrypt ? ctx->sa_in : ctx->sa_out, ctx->sa_len * 4); 477 sa->sa_command_0.bf.digest_len = crypto_aead_authsize(aead) >> 2; 478 479 if (req->iv[0] == 1) { 480 /* CRYPTO_MODE_AES_ICM */ 481 sa->sa_command_1.bf.crypto_mode9_8 = 1; 482 } 483 484 iv[3] = cpu_to_le32(0); 485 crypto4xx_memcpy_to_le32(iv, req->iv, 16 - (req->iv[0] + 1)); 486 487 return crypto4xx_build_pd(&req->base, ctx, req->src, req->dst, 488 len, iv, sizeof(iv), 489 sa, ctx->sa_len, req->assoclen, rctx->dst); 490 } 491 492 int crypto4xx_encrypt_aes_ccm(struct aead_request *req) 493 { 494 return crypto4xx_crypt_aes_ccm(req, false); 495 } 496 497 int crypto4xx_decrypt_aes_ccm(struct aead_request *req) 498 { 499 return crypto4xx_crypt_aes_ccm(req, true); 500 } 501 502 int crypto4xx_setauthsize_aead(struct crypto_aead *cipher, 503 unsigned int authsize) 504 { 505 struct crypto_tfm *tfm = crypto_aead_tfm(cipher); 506 struct crypto4xx_ctx *ctx = crypto_tfm_ctx(tfm); 507 508 return crypto_aead_setauthsize(ctx->sw_cipher.aead, authsize); 509 } 510 511 /** 512 * AES-GCM Functions 513 */ 514 515 static int crypto4xx_aes_gcm_validate_keylen(unsigned int keylen) 516 { 517 switch (keylen) { 518 case 16: 519 case 24: 520 case 32: 521 return 0; 522 default: 523 return -EINVAL; 524 } 525 } 526 527 static int crypto4xx_compute_gcm_hash_key_sw(__le32 *hash_start, const u8 *key, 528 unsigned int keylen) 529 { 530 struct crypto_aes_ctx ctx; 531 uint8_t src[16] = { 0 }; 532 int rc; 533 534 rc = aes_expandkey(&ctx, key, keylen); 535 if (rc) { 536 pr_err("aes_expandkey() failed: %d\n", rc); 537 return rc; 538 } 539 540 aes_encrypt(&ctx, src, src); 541 crypto4xx_memcpy_to_le32(hash_start, src, 16); 542 memzero_explicit(&ctx, sizeof(ctx)); 543 return 0; 544 } 545 546 int crypto4xx_setkey_aes_gcm(struct crypto_aead *cipher, 547 const u8 *key, unsigned int keylen) 548 { 549 struct crypto_tfm *tfm = crypto_aead_tfm(cipher); 550 struct crypto4xx_ctx *ctx = crypto_tfm_ctx(tfm); 551 struct dynamic_sa_ctl *sa; 552 int rc = 0; 553 554 if (crypto4xx_aes_gcm_validate_keylen(keylen) != 0) { 555 crypto_aead_set_flags(cipher, CRYPTO_TFM_RES_BAD_KEY_LEN); 556 return -EINVAL; 557 } 558 559 rc = crypto4xx_aead_setup_fallback(ctx, cipher, key, keylen); 560 if (rc) 561 return rc; 562 563 if (ctx->sa_in || ctx->sa_out) 564 crypto4xx_free_sa(ctx); 565 566 rc = crypto4xx_alloc_sa(ctx, SA_AES128_GCM_LEN + (keylen - 16) / 4); 567 if (rc) 568 return rc; 569 570 sa = (struct dynamic_sa_ctl *) ctx->sa_in; 571 572 sa->sa_contents.w = SA_AES_GCM_CONTENTS | (keylen << 2); 573 set_dynamic_sa_command_0(sa, SA_SAVE_HASH, SA_NOT_SAVE_IV, 574 SA_LOAD_HASH_FROM_SA, SA_LOAD_IV_FROM_STATE, 575 SA_NO_HEADER_PROC, SA_HASH_ALG_GHASH, 576 SA_CIPHER_ALG_AES, SA_PAD_TYPE_ZERO, 577 SA_OP_GROUP_BASIC, SA_OPCODE_HASH_DECRYPT, 578 DIR_INBOUND); 579 set_dynamic_sa_command_1(sa, CRYPTO_MODE_CTR, SA_HASH_MODE_HASH, 580 CRYPTO_FEEDBACK_MODE_NO_FB, SA_EXTENDED_SN_OFF, 581 SA_SEQ_MASK_ON, SA_MC_DISABLE, 582 SA_NOT_COPY_PAD, SA_COPY_PAYLOAD, 583 SA_NOT_COPY_HDR); 584 585 sa->sa_command_1.bf.key_len = keylen >> 3; 586 587 crypto4xx_memcpy_to_le32(get_dynamic_sa_key_field(sa), 588 key, keylen); 589 590 rc = crypto4xx_compute_gcm_hash_key_sw(get_dynamic_sa_inner_digest(sa), 591 key, keylen); 592 if (rc) { 593 pr_err("GCM hash key setting failed = %d\n", rc); 594 goto err; 595 } 596 597 memcpy(ctx->sa_out, ctx->sa_in, ctx->sa_len * 4); 598 sa = (struct dynamic_sa_ctl *) ctx->sa_out; 599 sa->sa_command_0.bf.dir = DIR_OUTBOUND; 600 sa->sa_command_0.bf.opcode = SA_OPCODE_ENCRYPT_HASH; 601 602 return 0; 603 err: 604 crypto4xx_free_sa(ctx); 605 return rc; 606 } 607 608 static inline int crypto4xx_crypt_aes_gcm(struct aead_request *req, 609 bool decrypt) 610 { 611 struct crypto4xx_ctx *ctx = crypto_tfm_ctx(req->base.tfm); 612 struct crypto4xx_aead_reqctx *rctx = aead_request_ctx(req); 613 __le32 iv[4]; 614 unsigned int len = req->cryptlen; 615 616 if (decrypt) 617 len -= crypto_aead_authsize(crypto_aead_reqtfm(req)); 618 619 if (crypto4xx_aead_need_fallback(req, len, false, decrypt)) 620 return crypto4xx_aead_fallback(req, ctx, decrypt); 621 622 crypto4xx_memcpy_to_le32(iv, req->iv, GCM_AES_IV_SIZE); 623 iv[3] = cpu_to_le32(1); 624 625 return crypto4xx_build_pd(&req->base, ctx, req->src, req->dst, 626 len, iv, sizeof(iv), 627 decrypt ? ctx->sa_in : ctx->sa_out, 628 ctx->sa_len, req->assoclen, rctx->dst); 629 } 630 631 int crypto4xx_encrypt_aes_gcm(struct aead_request *req) 632 { 633 return crypto4xx_crypt_aes_gcm(req, false); 634 } 635 636 int crypto4xx_decrypt_aes_gcm(struct aead_request *req) 637 { 638 return crypto4xx_crypt_aes_gcm(req, true); 639 } 640 641 /** 642 * HASH SHA1 Functions 643 */ 644 static int crypto4xx_hash_alg_init(struct crypto_tfm *tfm, 645 unsigned int sa_len, 646 unsigned char ha, 647 unsigned char hm) 648 { 649 struct crypto_alg *alg = tfm->__crt_alg; 650 struct crypto4xx_alg *my_alg; 651 struct crypto4xx_ctx *ctx = crypto_tfm_ctx(tfm); 652 struct dynamic_sa_hash160 *sa; 653 int rc; 654 655 my_alg = container_of(__crypto_ahash_alg(alg), struct crypto4xx_alg, 656 alg.u.hash); 657 ctx->dev = my_alg->dev; 658 659 /* Create SA */ 660 if (ctx->sa_in || ctx->sa_out) 661 crypto4xx_free_sa(ctx); 662 663 rc = crypto4xx_alloc_sa(ctx, sa_len); 664 if (rc) 665 return rc; 666 667 crypto_ahash_set_reqsize(__crypto_ahash_cast(tfm), 668 sizeof(struct crypto4xx_ctx)); 669 sa = (struct dynamic_sa_hash160 *)ctx->sa_in; 670 set_dynamic_sa_command_0(&sa->ctrl, SA_SAVE_HASH, SA_NOT_SAVE_IV, 671 SA_NOT_LOAD_HASH, SA_LOAD_IV_FROM_SA, 672 SA_NO_HEADER_PROC, ha, SA_CIPHER_ALG_NULL, 673 SA_PAD_TYPE_ZERO, SA_OP_GROUP_BASIC, 674 SA_OPCODE_HASH, DIR_INBOUND); 675 set_dynamic_sa_command_1(&sa->ctrl, 0, SA_HASH_MODE_HASH, 676 CRYPTO_FEEDBACK_MODE_NO_FB, SA_EXTENDED_SN_OFF, 677 SA_SEQ_MASK_OFF, SA_MC_ENABLE, 678 SA_NOT_COPY_PAD, SA_NOT_COPY_PAYLOAD, 679 SA_NOT_COPY_HDR); 680 /* Need to zero hash digest in SA */ 681 memset(sa->inner_digest, 0, sizeof(sa->inner_digest)); 682 memset(sa->outer_digest, 0, sizeof(sa->outer_digest)); 683 684 return 0; 685 } 686 687 int crypto4xx_hash_init(struct ahash_request *req) 688 { 689 struct crypto4xx_ctx *ctx = crypto_tfm_ctx(req->base.tfm); 690 int ds; 691 struct dynamic_sa_ctl *sa; 692 693 sa = ctx->sa_in; 694 ds = crypto_ahash_digestsize( 695 __crypto_ahash_cast(req->base.tfm)); 696 sa->sa_command_0.bf.digest_len = ds >> 2; 697 sa->sa_command_0.bf.load_hash_state = SA_LOAD_HASH_FROM_SA; 698 699 return 0; 700 } 701 702 int crypto4xx_hash_update(struct ahash_request *req) 703 { 704 struct crypto_ahash *ahash = crypto_ahash_reqtfm(req); 705 struct crypto4xx_ctx *ctx = crypto_tfm_ctx(req->base.tfm); 706 struct scatterlist dst; 707 unsigned int ds = crypto_ahash_digestsize(ahash); 708 709 sg_init_one(&dst, req->result, ds); 710 711 return crypto4xx_build_pd(&req->base, ctx, req->src, &dst, 712 req->nbytes, NULL, 0, ctx->sa_in, 713 ctx->sa_len, 0, NULL); 714 } 715 716 int crypto4xx_hash_final(struct ahash_request *req) 717 { 718 return 0; 719 } 720 721 int crypto4xx_hash_digest(struct ahash_request *req) 722 { 723 struct crypto_ahash *ahash = crypto_ahash_reqtfm(req); 724 struct crypto4xx_ctx *ctx = crypto_tfm_ctx(req->base.tfm); 725 struct scatterlist dst; 726 unsigned int ds = crypto_ahash_digestsize(ahash); 727 728 sg_init_one(&dst, req->result, ds); 729 730 return crypto4xx_build_pd(&req->base, ctx, req->src, &dst, 731 req->nbytes, NULL, 0, ctx->sa_in, 732 ctx->sa_len, 0, NULL); 733 } 734 735 /** 736 * SHA1 Algorithm 737 */ 738 int crypto4xx_sha1_alg_init(struct crypto_tfm *tfm) 739 { 740 return crypto4xx_hash_alg_init(tfm, SA_HASH160_LEN, SA_HASH_ALG_SHA1, 741 SA_HASH_MODE_HASH); 742 } 743