1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * Linear symmetric key cipher operations. 4 * 5 * Generic encrypt/decrypt wrapper for ciphers. 6 * 7 * Copyright (c) 2023 Herbert Xu <herbert@gondor.apana.org.au> 8 */ 9 10 #include <linux/cryptouser.h> 11 #include <linux/err.h> 12 #include <linux/export.h> 13 #include <linux/kernel.h> 14 #include <linux/seq_file.h> 15 #include <linux/slab.h> 16 #include <linux/string.h> 17 #include <net/netlink.h> 18 #include "skcipher.h" 19 20 static inline struct crypto_lskcipher *__crypto_lskcipher_cast( 21 struct crypto_tfm *tfm) 22 { 23 return container_of(tfm, struct crypto_lskcipher, base); 24 } 25 26 static inline struct lskcipher_alg *__crypto_lskcipher_alg( 27 struct crypto_alg *alg) 28 { 29 return container_of(alg, struct lskcipher_alg, co.base); 30 } 31 32 static inline struct crypto_istat_cipher *lskcipher_get_stat( 33 struct lskcipher_alg *alg) 34 { 35 return skcipher_get_stat_common(&alg->co); 36 } 37 38 static inline int crypto_lskcipher_errstat(struct lskcipher_alg *alg, int err) 39 { 40 struct crypto_istat_cipher *istat = lskcipher_get_stat(alg); 41 42 if (!IS_ENABLED(CONFIG_CRYPTO_STATS)) 43 return err; 44 45 if (err) 46 atomic64_inc(&istat->err_cnt); 47 48 return err; 49 } 50 51 static int lskcipher_setkey_unaligned(struct crypto_lskcipher *tfm, 52 const u8 *key, unsigned int keylen) 53 { 54 unsigned long alignmask = crypto_lskcipher_alignmask(tfm); 55 struct lskcipher_alg *cipher = crypto_lskcipher_alg(tfm); 56 u8 *buffer, *alignbuffer; 57 unsigned long absize; 58 int ret; 59 60 absize = keylen + alignmask; 61 buffer = kmalloc(absize, GFP_ATOMIC); 62 if (!buffer) 63 return -ENOMEM; 64 65 alignbuffer = (u8 *)ALIGN((unsigned long)buffer, alignmask + 1); 66 memcpy(alignbuffer, key, keylen); 67 ret = cipher->setkey(tfm, alignbuffer, keylen); 68 kfree_sensitive(buffer); 69 return ret; 70 } 71 72 int crypto_lskcipher_setkey(struct crypto_lskcipher *tfm, const u8 *key, 73 unsigned int keylen) 74 { 75 unsigned long alignmask = crypto_lskcipher_alignmask(tfm); 76 struct lskcipher_alg *cipher = crypto_lskcipher_alg(tfm); 77 78 if (keylen < cipher->co.min_keysize || keylen > cipher->co.max_keysize) 79 return -EINVAL; 80 81 if ((unsigned long)key & alignmask) 82 return lskcipher_setkey_unaligned(tfm, key, keylen); 83 else 84 return cipher->setkey(tfm, key, keylen); 85 } 86 EXPORT_SYMBOL_GPL(crypto_lskcipher_setkey); 87 88 static int crypto_lskcipher_crypt_unaligned( 89 struct crypto_lskcipher *tfm, const u8 *src, u8 *dst, unsigned len, 90 u8 *iv, int (*crypt)(struct crypto_lskcipher *tfm, const u8 *src, 91 u8 *dst, unsigned len, u8 *iv, bool final)) 92 { 93 unsigned ivsize = crypto_lskcipher_ivsize(tfm); 94 unsigned bs = crypto_lskcipher_blocksize(tfm); 95 unsigned cs = crypto_lskcipher_chunksize(tfm); 96 int err; 97 u8 *tiv; 98 u8 *p; 99 100 BUILD_BUG_ON(MAX_CIPHER_BLOCKSIZE > PAGE_SIZE || 101 MAX_CIPHER_ALIGNMASK >= PAGE_SIZE); 102 103 tiv = kmalloc(PAGE_SIZE, GFP_ATOMIC); 104 if (!tiv) 105 return -ENOMEM; 106 107 memcpy(tiv, iv, ivsize); 108 109 p = kmalloc(PAGE_SIZE, GFP_ATOMIC); 110 err = -ENOMEM; 111 if (!p) 112 goto out; 113 114 while (len >= bs) { 115 unsigned chunk = min((unsigned)PAGE_SIZE, len); 116 int err; 117 118 if (chunk > cs) 119 chunk &= ~(cs - 1); 120 121 memcpy(p, src, chunk); 122 err = crypt(tfm, p, p, chunk, tiv, true); 123 if (err) 124 goto out; 125 126 memcpy(dst, p, chunk); 127 src += chunk; 128 dst += chunk; 129 len -= chunk; 130 } 131 132 err = len ? -EINVAL : 0; 133 134 out: 135 memcpy(iv, tiv, ivsize); 136 kfree_sensitive(p); 137 kfree_sensitive(tiv); 138 return err; 139 } 140 141 static int crypto_lskcipher_crypt(struct crypto_lskcipher *tfm, const u8 *src, 142 u8 *dst, unsigned len, u8 *iv, 143 int (*crypt)(struct crypto_lskcipher *tfm, 144 const u8 *src, u8 *dst, 145 unsigned len, u8 *iv, 146 bool final)) 147 { 148 unsigned long alignmask = crypto_lskcipher_alignmask(tfm); 149 struct lskcipher_alg *alg = crypto_lskcipher_alg(tfm); 150 int ret; 151 152 if (((unsigned long)src | (unsigned long)dst | (unsigned long)iv) & 153 alignmask) { 154 ret = crypto_lskcipher_crypt_unaligned(tfm, src, dst, len, iv, 155 crypt); 156 goto out; 157 } 158 159 ret = crypt(tfm, src, dst, len, iv, true); 160 161 out: 162 return crypto_lskcipher_errstat(alg, ret); 163 } 164 165 int crypto_lskcipher_encrypt(struct crypto_lskcipher *tfm, const u8 *src, 166 u8 *dst, unsigned len, u8 *iv) 167 { 168 struct lskcipher_alg *alg = crypto_lskcipher_alg(tfm); 169 170 if (IS_ENABLED(CONFIG_CRYPTO_STATS)) { 171 struct crypto_istat_cipher *istat = lskcipher_get_stat(alg); 172 173 atomic64_inc(&istat->encrypt_cnt); 174 atomic64_add(len, &istat->encrypt_tlen); 175 } 176 177 return crypto_lskcipher_crypt(tfm, src, dst, len, iv, alg->encrypt); 178 } 179 EXPORT_SYMBOL_GPL(crypto_lskcipher_encrypt); 180 181 int crypto_lskcipher_decrypt(struct crypto_lskcipher *tfm, const u8 *src, 182 u8 *dst, unsigned len, u8 *iv) 183 { 184 struct lskcipher_alg *alg = crypto_lskcipher_alg(tfm); 185 186 if (IS_ENABLED(CONFIG_CRYPTO_STATS)) { 187 struct crypto_istat_cipher *istat = lskcipher_get_stat(alg); 188 189 atomic64_inc(&istat->decrypt_cnt); 190 atomic64_add(len, &istat->decrypt_tlen); 191 } 192 193 return crypto_lskcipher_crypt(tfm, src, dst, len, iv, alg->decrypt); 194 } 195 EXPORT_SYMBOL_GPL(crypto_lskcipher_decrypt); 196 197 static int crypto_lskcipher_crypt_sg(struct skcipher_request *req, 198 int (*crypt)(struct crypto_lskcipher *tfm, 199 const u8 *src, u8 *dst, 200 unsigned len, u8 *iv, 201 bool final)) 202 { 203 struct crypto_skcipher *skcipher = crypto_skcipher_reqtfm(req); 204 struct crypto_lskcipher **ctx = crypto_skcipher_ctx(skcipher); 205 struct crypto_lskcipher *tfm = *ctx; 206 struct skcipher_walk walk; 207 int err; 208 209 err = skcipher_walk_virt(&walk, req, false); 210 211 while (walk.nbytes) { 212 err = crypt(tfm, walk.src.virt.addr, walk.dst.virt.addr, 213 walk.nbytes, walk.iv, walk.nbytes == walk.total); 214 err = skcipher_walk_done(&walk, err); 215 } 216 217 return err; 218 } 219 220 int crypto_lskcipher_encrypt_sg(struct skcipher_request *req) 221 { 222 struct crypto_skcipher *skcipher = crypto_skcipher_reqtfm(req); 223 struct crypto_lskcipher **ctx = crypto_skcipher_ctx(skcipher); 224 struct lskcipher_alg *alg = crypto_lskcipher_alg(*ctx); 225 226 return crypto_lskcipher_crypt_sg(req, alg->encrypt); 227 } 228 229 int crypto_lskcipher_decrypt_sg(struct skcipher_request *req) 230 { 231 struct crypto_skcipher *skcipher = crypto_skcipher_reqtfm(req); 232 struct crypto_lskcipher **ctx = crypto_skcipher_ctx(skcipher); 233 struct lskcipher_alg *alg = crypto_lskcipher_alg(*ctx); 234 235 return crypto_lskcipher_crypt_sg(req, alg->decrypt); 236 } 237 238 static void crypto_lskcipher_exit_tfm(struct crypto_tfm *tfm) 239 { 240 struct crypto_lskcipher *skcipher = __crypto_lskcipher_cast(tfm); 241 struct lskcipher_alg *alg = crypto_lskcipher_alg(skcipher); 242 243 alg->exit(skcipher); 244 } 245 246 static int crypto_lskcipher_init_tfm(struct crypto_tfm *tfm) 247 { 248 struct crypto_lskcipher *skcipher = __crypto_lskcipher_cast(tfm); 249 struct lskcipher_alg *alg = crypto_lskcipher_alg(skcipher); 250 251 if (alg->exit) 252 skcipher->base.exit = crypto_lskcipher_exit_tfm; 253 254 if (alg->init) 255 return alg->init(skcipher); 256 257 return 0; 258 } 259 260 static void crypto_lskcipher_free_instance(struct crypto_instance *inst) 261 { 262 struct lskcipher_instance *skcipher = 263 container_of(inst, struct lskcipher_instance, s.base); 264 265 skcipher->free(skcipher); 266 } 267 268 static void __maybe_unused crypto_lskcipher_show( 269 struct seq_file *m, struct crypto_alg *alg) 270 { 271 struct lskcipher_alg *skcipher = __crypto_lskcipher_alg(alg); 272 273 seq_printf(m, "type : lskcipher\n"); 274 seq_printf(m, "blocksize : %u\n", alg->cra_blocksize); 275 seq_printf(m, "min keysize : %u\n", skcipher->co.min_keysize); 276 seq_printf(m, "max keysize : %u\n", skcipher->co.max_keysize); 277 seq_printf(m, "ivsize : %u\n", skcipher->co.ivsize); 278 seq_printf(m, "chunksize : %u\n", skcipher->co.chunksize); 279 } 280 281 static int __maybe_unused crypto_lskcipher_report( 282 struct sk_buff *skb, struct crypto_alg *alg) 283 { 284 struct lskcipher_alg *skcipher = __crypto_lskcipher_alg(alg); 285 struct crypto_report_blkcipher rblkcipher; 286 287 memset(&rblkcipher, 0, sizeof(rblkcipher)); 288 289 strscpy(rblkcipher.type, "lskcipher", sizeof(rblkcipher.type)); 290 strscpy(rblkcipher.geniv, "<none>", sizeof(rblkcipher.geniv)); 291 292 rblkcipher.blocksize = alg->cra_blocksize; 293 rblkcipher.min_keysize = skcipher->co.min_keysize; 294 rblkcipher.max_keysize = skcipher->co.max_keysize; 295 rblkcipher.ivsize = skcipher->co.ivsize; 296 297 return nla_put(skb, CRYPTOCFGA_REPORT_BLKCIPHER, 298 sizeof(rblkcipher), &rblkcipher); 299 } 300 301 static int __maybe_unused crypto_lskcipher_report_stat( 302 struct sk_buff *skb, struct crypto_alg *alg) 303 { 304 struct lskcipher_alg *skcipher = __crypto_lskcipher_alg(alg); 305 struct crypto_istat_cipher *istat; 306 struct crypto_stat_cipher rcipher; 307 308 istat = lskcipher_get_stat(skcipher); 309 310 memset(&rcipher, 0, sizeof(rcipher)); 311 312 strscpy(rcipher.type, "cipher", sizeof(rcipher.type)); 313 314 rcipher.stat_encrypt_cnt = atomic64_read(&istat->encrypt_cnt); 315 rcipher.stat_encrypt_tlen = atomic64_read(&istat->encrypt_tlen); 316 rcipher.stat_decrypt_cnt = atomic64_read(&istat->decrypt_cnt); 317 rcipher.stat_decrypt_tlen = atomic64_read(&istat->decrypt_tlen); 318 rcipher.stat_err_cnt = atomic64_read(&istat->err_cnt); 319 320 return nla_put(skb, CRYPTOCFGA_STAT_CIPHER, sizeof(rcipher), &rcipher); 321 } 322 323 static const struct crypto_type crypto_lskcipher_type = { 324 .extsize = crypto_alg_extsize, 325 .init_tfm = crypto_lskcipher_init_tfm, 326 .free = crypto_lskcipher_free_instance, 327 #ifdef CONFIG_PROC_FS 328 .show = crypto_lskcipher_show, 329 #endif 330 #if IS_ENABLED(CONFIG_CRYPTO_USER) 331 .report = crypto_lskcipher_report, 332 #endif 333 #ifdef CONFIG_CRYPTO_STATS 334 .report_stat = crypto_lskcipher_report_stat, 335 #endif 336 .maskclear = ~CRYPTO_ALG_TYPE_MASK, 337 .maskset = CRYPTO_ALG_TYPE_MASK, 338 .type = CRYPTO_ALG_TYPE_LSKCIPHER, 339 .tfmsize = offsetof(struct crypto_lskcipher, base), 340 }; 341 342 static void crypto_lskcipher_exit_tfm_sg(struct crypto_tfm *tfm) 343 { 344 struct crypto_lskcipher **ctx = crypto_tfm_ctx(tfm); 345 346 crypto_free_lskcipher(*ctx); 347 } 348 349 int crypto_init_lskcipher_ops_sg(struct crypto_tfm *tfm) 350 { 351 struct crypto_lskcipher **ctx = crypto_tfm_ctx(tfm); 352 struct crypto_alg *calg = tfm->__crt_alg; 353 struct crypto_lskcipher *skcipher; 354 355 if (!crypto_mod_get(calg)) 356 return -EAGAIN; 357 358 skcipher = crypto_create_tfm(calg, &crypto_lskcipher_type); 359 if (IS_ERR(skcipher)) { 360 crypto_mod_put(calg); 361 return PTR_ERR(skcipher); 362 } 363 364 *ctx = skcipher; 365 tfm->exit = crypto_lskcipher_exit_tfm_sg; 366 367 return 0; 368 } 369 370 int crypto_grab_lskcipher(struct crypto_lskcipher_spawn *spawn, 371 struct crypto_instance *inst, 372 const char *name, u32 type, u32 mask) 373 { 374 spawn->base.frontend = &crypto_lskcipher_type; 375 return crypto_grab_spawn(&spawn->base, inst, name, type, mask); 376 } 377 EXPORT_SYMBOL_GPL(crypto_grab_lskcipher); 378 379 struct crypto_lskcipher *crypto_alloc_lskcipher(const char *alg_name, 380 u32 type, u32 mask) 381 { 382 return crypto_alloc_tfm(alg_name, &crypto_lskcipher_type, type, mask); 383 } 384 EXPORT_SYMBOL_GPL(crypto_alloc_lskcipher); 385 386 static int lskcipher_prepare_alg(struct lskcipher_alg *alg) 387 { 388 struct crypto_alg *base = &alg->co.base; 389 int err; 390 391 err = skcipher_prepare_alg_common(&alg->co); 392 if (err) 393 return err; 394 395 if (alg->co.chunksize & (alg->co.chunksize - 1)) 396 return -EINVAL; 397 398 base->cra_type = &crypto_lskcipher_type; 399 base->cra_flags |= CRYPTO_ALG_TYPE_LSKCIPHER; 400 401 return 0; 402 } 403 404 int crypto_register_lskcipher(struct lskcipher_alg *alg) 405 { 406 struct crypto_alg *base = &alg->co.base; 407 int err; 408 409 err = lskcipher_prepare_alg(alg); 410 if (err) 411 return err; 412 413 return crypto_register_alg(base); 414 } 415 EXPORT_SYMBOL_GPL(crypto_register_lskcipher); 416 417 void crypto_unregister_lskcipher(struct lskcipher_alg *alg) 418 { 419 crypto_unregister_alg(&alg->co.base); 420 } 421 EXPORT_SYMBOL_GPL(crypto_unregister_lskcipher); 422 423 int crypto_register_lskciphers(struct lskcipher_alg *algs, int count) 424 { 425 int i, ret; 426 427 for (i = 0; i < count; i++) { 428 ret = crypto_register_lskcipher(&algs[i]); 429 if (ret) 430 goto err; 431 } 432 433 return 0; 434 435 err: 436 for (--i; i >= 0; --i) 437 crypto_unregister_lskcipher(&algs[i]); 438 439 return ret; 440 } 441 EXPORT_SYMBOL_GPL(crypto_register_lskciphers); 442 443 void crypto_unregister_lskciphers(struct lskcipher_alg *algs, int count) 444 { 445 int i; 446 447 for (i = count - 1; i >= 0; --i) 448 crypto_unregister_lskcipher(&algs[i]); 449 } 450 EXPORT_SYMBOL_GPL(crypto_unregister_lskciphers); 451 452 int lskcipher_register_instance(struct crypto_template *tmpl, 453 struct lskcipher_instance *inst) 454 { 455 int err; 456 457 if (WARN_ON(!inst->free)) 458 return -EINVAL; 459 460 err = lskcipher_prepare_alg(&inst->alg); 461 if (err) 462 return err; 463 464 return crypto_register_instance(tmpl, lskcipher_crypto_instance(inst)); 465 } 466 EXPORT_SYMBOL_GPL(lskcipher_register_instance); 467 468 static int lskcipher_setkey_simple(struct crypto_lskcipher *tfm, const u8 *key, 469 unsigned int keylen) 470 { 471 struct crypto_lskcipher *cipher = lskcipher_cipher_simple(tfm); 472 473 crypto_lskcipher_clear_flags(cipher, CRYPTO_TFM_REQ_MASK); 474 crypto_lskcipher_set_flags(cipher, crypto_lskcipher_get_flags(tfm) & 475 CRYPTO_TFM_REQ_MASK); 476 return crypto_lskcipher_setkey(cipher, key, keylen); 477 } 478 479 static int lskcipher_init_tfm_simple(struct crypto_lskcipher *tfm) 480 { 481 struct lskcipher_instance *inst = lskcipher_alg_instance(tfm); 482 struct crypto_lskcipher **ctx = crypto_lskcipher_ctx(tfm); 483 struct crypto_lskcipher_spawn *spawn; 484 struct crypto_lskcipher *cipher; 485 486 spawn = lskcipher_instance_ctx(inst); 487 cipher = crypto_spawn_lskcipher(spawn); 488 if (IS_ERR(cipher)) 489 return PTR_ERR(cipher); 490 491 *ctx = cipher; 492 return 0; 493 } 494 495 static void lskcipher_exit_tfm_simple(struct crypto_lskcipher *tfm) 496 { 497 struct crypto_lskcipher **ctx = crypto_lskcipher_ctx(tfm); 498 499 crypto_free_lskcipher(*ctx); 500 } 501 502 static void lskcipher_free_instance_simple(struct lskcipher_instance *inst) 503 { 504 crypto_drop_lskcipher(lskcipher_instance_ctx(inst)); 505 kfree(inst); 506 } 507 508 /** 509 * lskcipher_alloc_instance_simple - allocate instance of simple block cipher 510 * 511 * Allocate an lskcipher_instance for a simple block cipher mode of operation, 512 * e.g. cbc or ecb. The instance context will have just a single crypto_spawn, 513 * that for the underlying cipher. The {min,max}_keysize, ivsize, blocksize, 514 * alignmask, and priority are set from the underlying cipher but can be 515 * overridden if needed. The tfm context defaults to 516 * struct crypto_lskcipher *, and default ->setkey(), ->init(), and 517 * ->exit() methods are installed. 518 * 519 * @tmpl: the template being instantiated 520 * @tb: the template parameters 521 * 522 * Return: a pointer to the new instance, or an ERR_PTR(). The caller still 523 * needs to register the instance. 524 */ 525 struct lskcipher_instance *lskcipher_alloc_instance_simple( 526 struct crypto_template *tmpl, struct rtattr **tb) 527 { 528 u32 mask; 529 struct lskcipher_instance *inst; 530 struct crypto_lskcipher_spawn *spawn; 531 char ecb_name[CRYPTO_MAX_ALG_NAME]; 532 struct lskcipher_alg *cipher_alg; 533 const char *cipher_name; 534 int err; 535 536 err = crypto_check_attr_type(tb, CRYPTO_ALG_TYPE_LSKCIPHER, &mask); 537 if (err) 538 return ERR_PTR(err); 539 540 cipher_name = crypto_attr_alg_name(tb[1]); 541 if (IS_ERR(cipher_name)) 542 return ERR_CAST(cipher_name); 543 544 inst = kzalloc(sizeof(*inst) + sizeof(*spawn), GFP_KERNEL); 545 if (!inst) 546 return ERR_PTR(-ENOMEM); 547 548 spawn = lskcipher_instance_ctx(inst); 549 err = crypto_grab_lskcipher(spawn, 550 lskcipher_crypto_instance(inst), 551 cipher_name, 0, mask); 552 553 ecb_name[0] = 0; 554 if (err == -ENOENT && !!memcmp(tmpl->name, "ecb", 4)) { 555 err = -ENAMETOOLONG; 556 if (snprintf(ecb_name, CRYPTO_MAX_ALG_NAME, "ecb(%s)", 557 cipher_name) >= CRYPTO_MAX_ALG_NAME) 558 goto err_free_inst; 559 560 err = crypto_grab_lskcipher(spawn, 561 lskcipher_crypto_instance(inst), 562 ecb_name, 0, mask); 563 } 564 565 if (err) 566 goto err_free_inst; 567 568 cipher_alg = crypto_lskcipher_spawn_alg(spawn); 569 570 err = crypto_inst_setname(lskcipher_crypto_instance(inst), tmpl->name, 571 &cipher_alg->co.base); 572 if (err) 573 goto err_free_inst; 574 575 if (ecb_name[0]) { 576 int len; 577 578 err = -EINVAL; 579 len = strscpy(ecb_name, &cipher_alg->co.base.cra_name[4], 580 sizeof(ecb_name)); 581 if (len < 2) 582 goto err_free_inst; 583 584 if (ecb_name[len - 1] != ')') 585 goto err_free_inst; 586 587 ecb_name[len - 1] = 0; 588 589 err = -ENAMETOOLONG; 590 if (snprintf(inst->alg.co.base.cra_name, CRYPTO_MAX_ALG_NAME, 591 "%s(%s)", tmpl->name, ecb_name) >= 592 CRYPTO_MAX_ALG_NAME) 593 goto err_free_inst; 594 595 if (strcmp(ecb_name, cipher_name) && 596 snprintf(inst->alg.co.base.cra_driver_name, 597 CRYPTO_MAX_ALG_NAME, 598 "%s(%s)", tmpl->name, cipher_name) >= 599 CRYPTO_MAX_ALG_NAME) 600 goto err_free_inst; 601 } else { 602 /* Don't allow nesting. */ 603 err = -ELOOP; 604 if ((cipher_alg->co.base.cra_flags & CRYPTO_ALG_INSTANCE)) 605 goto err_free_inst; 606 } 607 608 err = -EINVAL; 609 if (cipher_alg->co.ivsize) 610 goto err_free_inst; 611 612 inst->free = lskcipher_free_instance_simple; 613 614 /* Default algorithm properties, can be overridden */ 615 inst->alg.co.base.cra_blocksize = cipher_alg->co.base.cra_blocksize; 616 inst->alg.co.base.cra_alignmask = cipher_alg->co.base.cra_alignmask; 617 inst->alg.co.base.cra_priority = cipher_alg->co.base.cra_priority; 618 inst->alg.co.min_keysize = cipher_alg->co.min_keysize; 619 inst->alg.co.max_keysize = cipher_alg->co.max_keysize; 620 inst->alg.co.ivsize = cipher_alg->co.base.cra_blocksize; 621 622 /* Use struct crypto_lskcipher * by default, can be overridden */ 623 inst->alg.co.base.cra_ctxsize = sizeof(struct crypto_lskcipher *); 624 inst->alg.setkey = lskcipher_setkey_simple; 625 inst->alg.init = lskcipher_init_tfm_simple; 626 inst->alg.exit = lskcipher_exit_tfm_simple; 627 628 return inst; 629 630 err_free_inst: 631 lskcipher_free_instance_simple(inst); 632 return ERR_PTR(err); 633 } 634 EXPORT_SYMBOL_GPL(lskcipher_alloc_instance_simple); 635