drivers/crypto/amcc/crypto4xx_alg.c

   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_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
 191 int crypto4xx_setkey_rfc3686(struct crypto_skcipher *cipher,
 192                              const u8 *key, unsigned int keylen)
 193 {
 194         struct crypto4xx_ctx *ctx = crypto_skcipher_ctx(cipher);
 195         int rc;
 196
 197         rc = crypto4xx_setkey_aes(cipher, key, 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((u32 *)&key[keylen -
 203                                                  CTR_RFC3686_NONCE_SIZE]);
 204
 205         return 0;
 206 }
 207
 208 int 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(cipher);
 212         __le32 iv[AES_IV_SIZE / 4] = {
 213                 ctx->iv_nonce,
 214                 cpu_to_le32p((u32 *) req->iv),
 215                 cpu_to_le32p((u32 *) (req->iv + 4)),
 216                 cpu_to_le32(1) };
 217
 218         return crypto4xx_build_pd(&req->base, ctx, req->src, req->dst,
 219                                   req->cryptlen, iv, AES_IV_SIZE,
 220                                   ctx->sa_out, ctx->sa_len, 0, NULL);
 221 }
 222
 223 int 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(cipher);
 227         __le32 iv[AES_IV_SIZE / 4] = {
 228                 ctx->iv_nonce,
 229                 cpu_to_le32p((u32 *) req->iv),
 230                 cpu_to_le32p((u32 *) (req->iv + 4)),
 231                 cpu_to_le32(1) };
 232
 233         return crypto4xx_build_pd(&req->base, ctx, req->src, req->dst,
 234                                   req->cryptlen, iv, AES_IV_SIZE,
 235                                   ctx->sa_out, ctx->sa_len, 0, NULL);
 236 }
 237
 238 static int
 239 crypto4xx_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(cipher);
 243         size_t iv_len = crypto_skcipher_ivsize(cipher);
 244         unsigned int counter = be32_to_cpup((__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(subreq, ctx->sw_cipher.cipher);
 259                 skcipher_request_set_callback(subreq, req->base.flags,
 260                         NULL, NULL);
 261                 skcipher_request_set_crypt(subreq, req->src, req->dst,
 262                         req->cryptlen, req->iv);
 263                 ret = encrypt ? crypto_skcipher_encrypt(subreq)
 264                         : crypto_skcipher_decrypt(subreq);
 265                 skcipher_request_zero(subreq);
 266                 return ret;
 267         }
 268
 269         return encrypt ? crypto4xx_encrypt_iv_stream(req)
 270                        : crypto4xx_decrypt_iv_stream(req);
 271 }
 272
 273 static 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(ctx->sw_cipher.cipher,
 279                                     CRYPTO_TFM_REQ_MASK);
 280         crypto_sync_skcipher_set_flags(ctx->sw_cipher.cipher,
 281                 crypto_skcipher_get_flags(cipher) & CRYPTO_TFM_REQ_MASK);
 282         return crypto_sync_skcipher_setkey(ctx->sw_cipher.cipher, key, keylen);
 283 }
 284
 285 int crypto4xx_setkey_aes_ctr(struct crypto_skcipher *cipher,
 286                              const u8 *key, unsigned int keylen)
 287 {
 288         struct crypto4xx_ctx *ctx = crypto_skcipher_ctx(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
 299 int crypto4xx_encrypt_ctr(struct skcipher_request *req)
 300 {
 301         return crypto4xx_ctr_crypt(req, true);
 302 }
 303
 304 int crypto4xx_decrypt_ctr(struct skcipher_request *req)
 305 {
 306         return crypto4xx_ctr_crypt(req, false);
 307 }
 308
 309 static 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
 337 static 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(subreq, ctx->sw_cipher.aead);
 343         aead_request_set_callback(subreq, req->base.flags,
 344                                   req->base.complete, req->base.data);
 345         aead_request_set_crypt(subreq, req->src, req->dst, req->cryptlen,
 346                                req->iv);
 347         aead_request_set_ad(subreq, req->assoclen);
 348         return do_decrypt ? crypto_aead_decrypt(subreq) :
 349                             crypto_aead_encrypt(subreq);
 350 }
 351
 352 static 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(ctx->sw_cipher.aead, CRYPTO_TFM_REQ_MASK);
 358         crypto_aead_set_flags(ctx->sw_cipher.aead,
 359                 crypto_aead_get_flags(cipher) & CRYPTO_TFM_REQ_MASK);
 360         return crypto_aead_setkey(ctx->sw_cipher.aead, key, keylen);
 361 }
 362
 363 /*
 364  * AES-CCM Functions
 365  */
 366
 367 int crypto4xx_setkey_aes_ccm(struct crypto_aead *cipher, const u8 *key,
 368                              unsigned int keylen)
 369 {
 370         struct crypto_tfm *tfm = crypto_aead_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(get_dynamic_sa_key_field(sa), key, 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
 427 static int crypto4xx_crypt_aes_ccm(struct aead_request *req, bool decrypt)
 428 {
 429         struct crypto4xx_ctx *ctx  = crypto_tfm_ctx(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(aead);
 439
 440         if (crypto4xx_aead_need_fallback(req, len, true, decrypt))
 441                 return crypto4xx_aead_fallback(req, ctx, 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(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(iv, req->iv, 16 - (req->iv[0] + 1));
 453
 454         return crypto4xx_build_pd(&req->base, ctx, req->src, req->dst,
 455                                   len, iv, sizeof(iv),
 456                                   sa, ctx->sa_len, req->assoclen, rctx->dst);
 457 }
 458
 459 int crypto4xx_encrypt_aes_ccm(struct aead_request *req)
 460 {
 461         return crypto4xx_crypt_aes_ccm(req, false);
 462 }
 463
 464 int crypto4xx_decrypt_aes_ccm(struct aead_request *req)
 465 {
 466         return crypto4xx_crypt_aes_ccm(req, true);
 467 }
 468
 469 int crypto4xx_setauthsize_aead(struct crypto_aead *cipher,
 470                                unsigned int authsize)
 471 {
 472         struct crypto_tfm *tfm = crypto_aead_tfm(cipher);
 473         struct crypto4xx_ctx *ctx = crypto_tfm_ctx(tfm);
 474
 475         return crypto_aead_setauthsize(ctx->sw_cipher.aead, authsize);
 476 }
 477
 478 /*
 479  * AES-GCM Functions
 480  */
 481
 482 static 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
 494 static 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, key, keylen);
 502         if (rc) {
 503                 pr_err("aes_expandkey() failed: %d\n", rc);
 504                 return rc;
 505         }
 506
 507         aes_encrypt(&ctx, src, src);
 508         crypto4xx_memcpy_to_le32(hash_start, src, 16);
 509         memzero_explicit(&ctx, sizeof(ctx));
 510         return 0;
 511 }
 512
 513 int crypto4xx_setkey_aes_gcm(struct crypto_aead *cipher,
 514                              const u8 *key, unsigned int keylen)
 515 {
 516         struct crypto_tfm *tfm = crypto_aead_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(get_dynamic_sa_key_field(sa),
 553                                  key, keylen);
 554
 555         rc = crypto4xx_compute_gcm_hash_key_sw(get_dynamic_sa_inner_digest(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;
 568 err:
 569         crypto4xx_free_sa(ctx);
 570         return rc;
 571 }
 572
 573 static inline int crypto4xx_crypt_aes_gcm(struct aead_request *req,
 574                                           bool decrypt)
 575 {
 576         struct crypto4xx_ctx *ctx = crypto_tfm_ctx(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(crypto_aead_reqtfm(req));
 583
 584         if (crypto4xx_aead_need_fallback(req, len, false, decrypt))
 585                 return crypto4xx_aead_fallback(req, ctx, decrypt);
 586
 587         crypto4xx_memcpy_to_le32(iv, req->iv, GCM_AES_IV_SIZE);
 588         iv[3] = cpu_to_le32(1);
 589
 590         return crypto4xx_build_pd(&req->base, ctx, req->src, req->dst,
 591                                   len, iv, sizeof(iv),
 592                                   decrypt ? ctx->sa_in : ctx->sa_out,
 593                                   ctx->sa_len, req->assoclen, rctx->dst);
 594 }
 595
 596 int crypto4xx_encrypt_aes_gcm(struct aead_request *req)
 597 {
 598         return crypto4xx_crypt_aes_gcm(req, false);
 599 }
 600
 601 int crypto4xx_decrypt_aes_gcm(struct aead_request *req)
 602 {
 603         return crypto4xx_crypt_aes_gcm(req, true);
 604 }
 605
 606 /*
 607  * HASH SHA1 Functions
 608  */
 609 static 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, sa_len);
 629         if (rc)
 630                 return rc;
 631
 632         crypto_ahash_set_reqsize(__crypto_ahash_cast(tfm),
 633                                  sizeof(struct crypto4xx_ctx));
 634         sa = (struct dynamic_sa_hash160 *)ctx->sa_in;
 635         set_dynamic_sa_command_0(&sa->ctrl, SA_SAVE_HASH, SA_NOT_SAVE_IV,
 636                                  SA_NOT_LOAD_HASH, SA_LOAD_IV_FROM_SA,
 637                                  SA_NO_HEADER_PROC, 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->ctrl, 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
 652 int crypto4xx_hash_init(struct ahash_request *req)
 653 {
 654         struct crypto4xx_ctx *ctx = crypto_tfm_ctx(req->base.tfm);
 655         int ds;
 656         struct dynamic_sa_ctl *sa;
 657
 658         sa = ctx->sa_in;
 659         ds = crypto_ahash_digestsize(
 660                         __crypto_ahash_cast(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
 667 int 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(req->base.tfm);
 671         struct scatterlist dst;
 672         unsigned int ds = crypto_ahash_digestsize(ahash);
 673
 674         sg_init_one(&dst, req->result, ds);
 675
 676         return crypto4xx_build_pd(&req->base, ctx, req->src, &dst,
 677                                   req->nbytes, NULL, 0, ctx->sa_in,
 678                                   ctx->sa_len, 0, NULL);
 679 }
 680
 681 int crypto4xx_hash_final(struct ahash_request *req)
 682 {
 683         return 0;
 684 }
 685
 686 int 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(req->base.tfm);
 690         struct scatterlist dst;
 691         unsigned int ds = crypto_ahash_digestsize(ahash);
 692
 693         sg_init_one(&dst, req->result, ds);
 694
 695         return crypto4xx_build_pd(&req->base, ctx, req->src, &dst,
 696                                   req->nbytes, NULL, 0, ctx->sa_in,
 697                                   ctx->sa_len, 0, NULL);
 698 }
 699
 700 /*
 701  * SHA1 Algorithm
 702  */
 703 int 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 }