1/* SPDX-License-Identifier: GPL-2.0-or-later */ 2/* 3 * Scatterlist Cryptographic API. 4 * 5 * Copyright (c) 2002 James Morris <jmorris@intercode.com.au> 6 * Copyright (c) 2002 David S. Miller (davem@redhat.com) 7 * Copyright (c) 2005 Herbert Xu <herbert@gondor.apana.org.au> 8 * 9 * Portions derived from Cryptoapi, by Alexander Kjeldaas <astor@fast.no> 10 * and Nettle, by Niels Möller. 11 */ 12#ifndef _LINUX_CRYPTO_H 13#define _LINUX_CRYPTO_H 14 15#include <linux/atomic.h> 16#include <linux/kernel.h> 17#include <linux/list.h> 18#include <linux/bug.h> 19#include <linux/slab.h> 20#include <linux/string.h> 21#include <linux/uaccess.h> 22#include <linux/completion.h> 23 24/* 25 * Autoloaded crypto modules should only use a prefixed name to avoid allowing 26 * arbitrary modules to be loaded. Loading from userspace may still need the 27 * unprefixed names, so retains those aliases as well. 28 * This uses __MODULE_INFO directly instead of MODULE_ALIAS because pre-4.3 29 * gcc (e.g. avr32 toolchain) uses __LINE__ for uniqueness, and this macro 30 * expands twice on the same line. Instead, use a separate base name for the 31 * alias. 32 */ 33#define MODULE_ALIAS_CRYPTO(name) \ 34 __MODULE_INFO(alias, alias_userspace, name); \ 35 __MODULE_INFO(alias, alias_crypto, "crypto-" name) 36 37/* 38 * Algorithm masks and types. 39 */ 40#define CRYPTO_ALG_TYPE_MASK 0x0000000f 41#define CRYPTO_ALG_TYPE_CIPHER 0x00000001 42#define CRYPTO_ALG_TYPE_COMPRESS 0x00000002 43#define CRYPTO_ALG_TYPE_AEAD 0x00000003 44#define CRYPTO_ALG_TYPE_BLKCIPHER 0x00000004 45#define CRYPTO_ALG_TYPE_ABLKCIPHER 0x00000005 46#define CRYPTO_ALG_TYPE_SKCIPHER 0x00000005 47#define CRYPTO_ALG_TYPE_KPP 0x00000008 48#define CRYPTO_ALG_TYPE_ACOMPRESS 0x0000000a 49#define CRYPTO_ALG_TYPE_SCOMPRESS 0x0000000b 50#define CRYPTO_ALG_TYPE_RNG 0x0000000c 51#define CRYPTO_ALG_TYPE_AKCIPHER 0x0000000d 52#define CRYPTO_ALG_TYPE_DIGEST 0x0000000e 53#define CRYPTO_ALG_TYPE_HASH 0x0000000e 54#define CRYPTO_ALG_TYPE_SHASH 0x0000000e 55#define CRYPTO_ALG_TYPE_AHASH 0x0000000f 56 57#define CRYPTO_ALG_TYPE_HASH_MASK 0x0000000e 58#define CRYPTO_ALG_TYPE_AHASH_MASK 0x0000000e 59#define CRYPTO_ALG_TYPE_BLKCIPHER_MASK 0x0000000c 60#define CRYPTO_ALG_TYPE_ACOMPRESS_MASK 0x0000000e 61 62#define CRYPTO_ALG_LARVAL 0x00000010 63#define CRYPTO_ALG_DEAD 0x00000020 64#define CRYPTO_ALG_DYING 0x00000040 65#define CRYPTO_ALG_ASYNC 0x00000080 66 67/* 68 * Set this bit if and only if the algorithm requires another algorithm of 69 * the same type to handle corner cases. 70 */ 71#define CRYPTO_ALG_NEED_FALLBACK 0x00000100 72 73/* 74 * Set if the algorithm has passed automated run-time testing. Note that 75 * if there is no run-time testing for a given algorithm it is considered 76 * to have passed. 77 */ 78 79#define CRYPTO_ALG_TESTED 0x00000400 80 81/* 82 * Set if the algorithm is an instance that is built from templates. 83 */ 84#define CRYPTO_ALG_INSTANCE 0x00000800 85 86/* Set this bit if the algorithm provided is hardware accelerated but 87 * not available to userspace via instruction set or so. 88 */ 89#define CRYPTO_ALG_KERN_DRIVER_ONLY 0x00001000 90 91/* 92 * Mark a cipher as a service implementation only usable by another 93 * cipher and never by a normal user of the kernel crypto API 94 */ 95#define CRYPTO_ALG_INTERNAL 0x00002000 96 97/* 98 * Set if the algorithm has a ->setkey() method but can be used without 99 * calling it first, i.e. there is a default key. 100 */ 101#define CRYPTO_ALG_OPTIONAL_KEY 0x00004000 102 103/* 104 * Don't trigger module loading 105 */ 106#define CRYPTO_NOLOAD 0x00008000 107 108/* 109 * Transform masks and values (for crt_flags). 110 */ 111#define CRYPTO_TFM_NEED_KEY 0x00000001 112 113#define CRYPTO_TFM_REQ_MASK 0x000fff00 114#define CRYPTO_TFM_RES_MASK 0xfff00000 115 116#define CRYPTO_TFM_REQ_FORBID_WEAK_KEYS 0x00000100 117#define CRYPTO_TFM_REQ_MAY_SLEEP 0x00000200 118#define CRYPTO_TFM_REQ_MAY_BACKLOG 0x00000400 119#define CRYPTO_TFM_RES_WEAK_KEY 0x00100000 120#define CRYPTO_TFM_RES_BAD_KEY_LEN 0x00200000 121#define CRYPTO_TFM_RES_BAD_KEY_SCHED 0x00400000 122#define CRYPTO_TFM_RES_BAD_BLOCK_LEN 0x00800000 123#define CRYPTO_TFM_RES_BAD_FLAGS 0x01000000 124 125/* 126 * Miscellaneous stuff. 127 */ 128#define CRYPTO_MAX_ALG_NAME 128 129 130/* 131 * The macro CRYPTO_MINALIGN_ATTR (along with the void * type in the actual 132 * declaration) is used to ensure that the crypto_tfm context structure is 133 * aligned correctly for the given architecture so that there are no alignment 134 * faults for C data types. In particular, this is required on platforms such 135 * as arm where pointers are 32-bit aligned but there are data types such as 136 * u64 which require 64-bit alignment. 137 */ 138#define CRYPTO_MINALIGN ARCH_KMALLOC_MINALIGN 139 140#define CRYPTO_MINALIGN_ATTR __attribute__ ((__aligned__(CRYPTO_MINALIGN))) 141 142struct scatterlist; 143struct crypto_ablkcipher; 144struct crypto_async_request; 145struct crypto_blkcipher; 146struct crypto_tfm; 147struct crypto_type; 148 149typedef void (*crypto_completion_t)(struct crypto_async_request *req, int err); 150 151/** 152 * DOC: Block Cipher Context Data Structures 153 * 154 * These data structures define the operating context for each block cipher 155 * type. 156 */ 157 158struct crypto_async_request { 159 struct list_head list; 160 crypto_completion_t complete; 161 void *data; 162 struct crypto_tfm *tfm; 163 164 u32 flags; 165}; 166 167struct ablkcipher_request { 168 struct crypto_async_request base; 169 170 unsigned int nbytes; 171 172 void *info; 173 174 struct scatterlist *src; 175 struct scatterlist *dst; 176 177 void *__ctx[] CRYPTO_MINALIGN_ATTR; 178}; 179 180struct blkcipher_desc { 181 struct crypto_blkcipher *tfm; 182 void *info; 183 u32 flags; 184}; 185 186/** 187 * DOC: Block Cipher Algorithm Definitions 188 * 189 * These data structures define modular crypto algorithm implementations, 190 * managed via crypto_register_alg() and crypto_unregister_alg(). 191 */ 192 193/** 194 * struct ablkcipher_alg - asynchronous block cipher definition 195 * @min_keysize: Minimum key size supported by the transformation. This is the 196 * smallest key length supported by this transformation algorithm. 197 * This must be set to one of the pre-defined values as this is 198 * not hardware specific. Possible values for this field can be 199 * found via git grep "_MIN_KEY_SIZE" include/crypto/ 200 * @max_keysize: Maximum key size supported by the transformation. This is the 201 * largest key length supported by this transformation algorithm. 202 * This must be set to one of the pre-defined values as this is 203 * not hardware specific. Possible values for this field can be 204 * found via git grep "_MAX_KEY_SIZE" include/crypto/ 205 * @setkey: Set key for the transformation. This function is used to either 206 * program a supplied key into the hardware or store the key in the 207 * transformation context for programming it later. Note that this 208 * function does modify the transformation context. This function can 209 * be called multiple times during the existence of the transformation 210 * object, so one must make sure the key is properly reprogrammed into 211 * the hardware. This function is also responsible for checking the key 212 * length for validity. In case a software fallback was put in place in 213 * the @cra_init call, this function might need to use the fallback if 214 * the algorithm doesn't support all of the key sizes. 215 * @encrypt: Encrypt a scatterlist of blocks. This function is used to encrypt 216 * the supplied scatterlist containing the blocks of data. The crypto 217 * API consumer is responsible for aligning the entries of the 218 * scatterlist properly and making sure the chunks are correctly 219 * sized. In case a software fallback was put in place in the 220 * @cra_init call, this function might need to use the fallback if 221 * the algorithm doesn't support all of the key sizes. In case the 222 * key was stored in transformation context, the key might need to be 223 * re-programmed into the hardware in this function. This function 224 * shall not modify the transformation context, as this function may 225 * be called in parallel with the same transformation object. 226 * @decrypt: Decrypt a single block. This is a reverse counterpart to @encrypt 227 * and the conditions are exactly the same. 228 * @ivsize: IV size applicable for transformation. The consumer must provide an 229 * IV of exactly that size to perform the encrypt or decrypt operation. 230 * 231 * All fields except @ivsize are mandatory and must be filled. 232 */ 233struct ablkcipher_alg { 234 int (*setkey)(struct crypto_ablkcipher *tfm, const u8 *key, 235 unsigned int keylen); 236 int (*encrypt)(struct ablkcipher_request *req); 237 int (*decrypt)(struct ablkcipher_request *req); 238 239 unsigned int min_keysize; 240 unsigned int max_keysize; 241 unsigned int ivsize; 242}; 243 244/** 245 * struct blkcipher_alg - synchronous block cipher definition 246 * @min_keysize: see struct ablkcipher_alg 247 * @max_keysize: see struct ablkcipher_alg 248 * @setkey: see struct ablkcipher_alg 249 * @encrypt: see struct ablkcipher_alg 250 * @decrypt: see struct ablkcipher_alg 251 * @ivsize: see struct ablkcipher_alg 252 * 253 * All fields except @ivsize are mandatory and must be filled. 254 */ 255struct blkcipher_alg { 256 int (*setkey)(struct crypto_tfm *tfm, const u8 *key, 257 unsigned int keylen); 258 int (*encrypt)(struct blkcipher_desc *desc, 259 struct scatterlist *dst, struct scatterlist *src, 260 unsigned int nbytes); 261 int (*decrypt)(struct blkcipher_desc *desc, 262 struct scatterlist *dst, struct scatterlist *src, 263 unsigned int nbytes); 264 265 unsigned int min_keysize; 266 unsigned int max_keysize; 267 unsigned int ivsize; 268}; 269 270/** 271 * struct cipher_alg - single-block symmetric ciphers definition 272 * @cia_min_keysize: Minimum key size supported by the transformation. This is 273 * the smallest key length supported by this transformation 274 * algorithm. This must be set to one of the pre-defined 275 * values as this is not hardware specific. Possible values 276 * for this field can be found via git grep "_MIN_KEY_SIZE" 277 * include/crypto/ 278 * @cia_max_keysize: Maximum key size supported by the transformation. This is 279 * the largest key length supported by this transformation 280 * algorithm. This must be set to one of the pre-defined values 281 * as this is not hardware specific. Possible values for this 282 * field can be found via git grep "_MAX_KEY_SIZE" 283 * include/crypto/ 284 * @cia_setkey: Set key for the transformation. This function is used to either 285 * program a supplied key into the hardware or store the key in the 286 * transformation context for programming it later. Note that this 287 * function does modify the transformation context. This function 288 * can be called multiple times during the existence of the 289 * transformation object, so one must make sure the key is properly 290 * reprogrammed into the hardware. This function is also 291 * responsible for checking the key length for validity. 292 * @cia_encrypt: Encrypt a single block. This function is used to encrypt a 293 * single block of data, which must be @cra_blocksize big. This 294 * always operates on a full @cra_blocksize and it is not possible 295 * to encrypt a block of smaller size. The supplied buffers must 296 * therefore also be at least of @cra_blocksize size. Both the 297 * input and output buffers are always aligned to @cra_alignmask. 298 * In case either of the input or output buffer supplied by user 299 * of the crypto API is not aligned to @cra_alignmask, the crypto 300 * API will re-align the buffers. The re-alignment means that a 301 * new buffer will be allocated, the data will be copied into the 302 * new buffer, then the processing will happen on the new buffer, 303 * then the data will be copied back into the original buffer and 304 * finally the new buffer will be freed. In case a software 305 * fallback was put in place in the @cra_init call, this function 306 * might need to use the fallback if the algorithm doesn't support 307 * all of the key sizes. In case the key was stored in 308 * transformation context, the key might need to be re-programmed 309 * into the hardware in this function. This function shall not 310 * modify the transformation context, as this function may be 311 * called in parallel with the same transformation object. 312 * @cia_decrypt: Decrypt a single block. This is a reverse counterpart to 313 * @cia_encrypt, and the conditions are exactly the same. 314 * 315 * All fields are mandatory and must be filled. 316 */ 317struct cipher_alg { 318 unsigned int cia_min_keysize; 319 unsigned int cia_max_keysize; 320 int (*cia_setkey)(struct crypto_tfm *tfm, const u8 *key, 321 unsigned int keylen); 322 void (*cia_encrypt)(struct crypto_tfm *tfm, u8 *dst, const u8 *src); 323 void (*cia_decrypt)(struct crypto_tfm *tfm, u8 *dst, const u8 *src); 324}; 325 326struct compress_alg { 327 int (*coa_compress)(struct crypto_tfm *tfm, const u8 *src, 328 unsigned int slen, u8 *dst, unsigned int *dlen); 329 int (*coa_decompress)(struct crypto_tfm *tfm, const u8 *src, 330 unsigned int slen, u8 *dst, unsigned int *dlen); 331}; 332 333#ifdef CONFIG_CRYPTO_STATS 334/* 335 * struct crypto_istat_aead - statistics for AEAD algorithm 336 * @encrypt_cnt: number of encrypt requests 337 * @encrypt_tlen: total data size handled by encrypt requests 338 * @decrypt_cnt: number of decrypt requests 339 * @decrypt_tlen: total data size handled by decrypt requests 340 * @err_cnt: number of error for AEAD requests 341 */ 342struct crypto_istat_aead { 343 atomic64_t encrypt_cnt; 344 atomic64_t encrypt_tlen; 345 atomic64_t decrypt_cnt; 346 atomic64_t decrypt_tlen; 347 atomic64_t err_cnt; 348}; 349 350/* 351 * struct crypto_istat_akcipher - statistics for akcipher algorithm 352 * @encrypt_cnt: number of encrypt requests 353 * @encrypt_tlen: total data size handled by encrypt requests 354 * @decrypt_cnt: number of decrypt requests 355 * @decrypt_tlen: total data size handled by decrypt requests 356 * @verify_cnt: number of verify operation 357 * @sign_cnt: number of sign requests 358 * @err_cnt: number of error for akcipher requests 359 */ 360struct crypto_istat_akcipher { 361 atomic64_t encrypt_cnt; 362 atomic64_t encrypt_tlen; 363 atomic64_t decrypt_cnt; 364 atomic64_t decrypt_tlen; 365 atomic64_t verify_cnt; 366 atomic64_t sign_cnt; 367 atomic64_t err_cnt; 368}; 369 370/* 371 * struct crypto_istat_cipher - statistics for cipher algorithm 372 * @encrypt_cnt: number of encrypt requests 373 * @encrypt_tlen: total data size handled by encrypt requests 374 * @decrypt_cnt: number of decrypt requests 375 * @decrypt_tlen: total data size handled by decrypt requests 376 * @err_cnt: number of error for cipher requests 377 */ 378struct crypto_istat_cipher { 379 atomic64_t encrypt_cnt; 380 atomic64_t encrypt_tlen; 381 atomic64_t decrypt_cnt; 382 atomic64_t decrypt_tlen; 383 atomic64_t err_cnt; 384}; 385 386/* 387 * struct crypto_istat_compress - statistics for compress algorithm 388 * @compress_cnt: number of compress requests 389 * @compress_tlen: total data size handled by compress requests 390 * @decompress_cnt: number of decompress requests 391 * @decompress_tlen: total data size handled by decompress requests 392 * @err_cnt: number of error for compress requests 393 */ 394struct crypto_istat_compress { 395 atomic64_t compress_cnt; 396 atomic64_t compress_tlen; 397 atomic64_t decompress_cnt; 398 atomic64_t decompress_tlen; 399 atomic64_t err_cnt; 400}; 401 402/* 403 * struct crypto_istat_hash - statistics for has algorithm 404 * @hash_cnt: number of hash requests 405 * @hash_tlen: total data size hashed 406 * @err_cnt: number of error for hash requests 407 */ 408struct crypto_istat_hash { 409 atomic64_t hash_cnt; 410 atomic64_t hash_tlen; 411 atomic64_t err_cnt; 412}; 413 414/* 415 * struct crypto_istat_kpp - statistics for KPP algorithm 416 * @setsecret_cnt: number of setsecrey operation 417 * @generate_public_key_cnt: number of generate_public_key operation 418 * @compute_shared_secret_cnt: number of compute_shared_secret operation 419 * @err_cnt: number of error for KPP requests 420 */ 421struct crypto_istat_kpp { 422 atomic64_t setsecret_cnt; 423 atomic64_t generate_public_key_cnt; 424 atomic64_t compute_shared_secret_cnt; 425 atomic64_t err_cnt; 426}; 427 428/* 429 * struct crypto_istat_rng: statistics for RNG algorithm 430 * @generate_cnt: number of RNG generate requests 431 * @generate_tlen: total data size of generated data by the RNG 432 * @seed_cnt: number of times the RNG was seeded 433 * @err_cnt: number of error for RNG requests 434 */ 435struct crypto_istat_rng { 436 atomic64_t generate_cnt; 437 atomic64_t generate_tlen; 438 atomic64_t seed_cnt; 439 atomic64_t err_cnt; 440}; 441#endif /* CONFIG_CRYPTO_STATS */ 442 443#define cra_ablkcipher cra_u.ablkcipher 444#define cra_blkcipher cra_u.blkcipher 445#define cra_cipher cra_u.cipher 446#define cra_compress cra_u.compress 447 448/** 449 * struct crypto_alg - definition of a cryptograpic cipher algorithm 450 * @cra_flags: Flags describing this transformation. See include/linux/crypto.h 451 * CRYPTO_ALG_* flags for the flags which go in here. Those are 452 * used for fine-tuning the description of the transformation 453 * algorithm. 454 * @cra_blocksize: Minimum block size of this transformation. The size in bytes 455 * of the smallest possible unit which can be transformed with 456 * this algorithm. The users must respect this value. 457 * In case of HASH transformation, it is possible for a smaller 458 * block than @cra_blocksize to be passed to the crypto API for 459 * transformation, in case of any other transformation type, an 460 * error will be returned upon any attempt to transform smaller 461 * than @cra_blocksize chunks. 462 * @cra_ctxsize: Size of the operational context of the transformation. This 463 * value informs the kernel crypto API about the memory size 464 * needed to be allocated for the transformation context. 465 * @cra_alignmask: Alignment mask for the input and output data buffer. The data 466 * buffer containing the input data for the algorithm must be 467 * aligned to this alignment mask. The data buffer for the 468 * output data must be aligned to this alignment mask. Note that 469 * the Crypto API will do the re-alignment in software, but 470 * only under special conditions and there is a performance hit. 471 * The re-alignment happens at these occasions for different 472 * @cra_u types: cipher -- For both input data and output data 473 * buffer; ahash -- For output hash destination buf; shash -- 474 * For output hash destination buf. 475 * This is needed on hardware which is flawed by design and 476 * cannot pick data from arbitrary addresses. 477 * @cra_priority: Priority of this transformation implementation. In case 478 * multiple transformations with same @cra_name are available to 479 * the Crypto API, the kernel will use the one with highest 480 * @cra_priority. 481 * @cra_name: Generic name (usable by multiple implementations) of the 482 * transformation algorithm. This is the name of the transformation 483 * itself. This field is used by the kernel when looking up the 484 * providers of particular transformation. 485 * @cra_driver_name: Unique name of the transformation provider. This is the 486 * name of the provider of the transformation. This can be any 487 * arbitrary value, but in the usual case, this contains the 488 * name of the chip or provider and the name of the 489 * transformation algorithm. 490 * @cra_type: Type of the cryptographic transformation. This is a pointer to 491 * struct crypto_type, which implements callbacks common for all 492 * transformation types. There are multiple options: 493 * &crypto_blkcipher_type, &crypto_ablkcipher_type, 494 * &crypto_ahash_type, &crypto_rng_type. 495 * This field might be empty. In that case, there are no common 496 * callbacks. This is the case for: cipher, compress, shash. 497 * @cra_u: Callbacks implementing the transformation. This is a union of 498 * multiple structures. Depending on the type of transformation selected 499 * by @cra_type and @cra_flags above, the associated structure must be 500 * filled with callbacks. This field might be empty. This is the case 501 * for ahash, shash. 502 * @cra_init: Initialize the cryptographic transformation object. This function 503 * is used to initialize the cryptographic transformation object. 504 * This function is called only once at the instantiation time, right 505 * after the transformation context was allocated. In case the 506 * cryptographic hardware has some special requirements which need to 507 * be handled by software, this function shall check for the precise 508 * requirement of the transformation and put any software fallbacks 509 * in place. 510 * @cra_exit: Deinitialize the cryptographic transformation object. This is a 511 * counterpart to @cra_init, used to remove various changes set in 512 * @cra_init. 513 * @cra_u.ablkcipher: Union member which contains an asynchronous block cipher 514 * definition. See @struct @ablkcipher_alg. 515 * @cra_u.blkcipher: Union member which contains a synchronous block cipher 516 * definition See @struct @blkcipher_alg. 517 * @cra_u.cipher: Union member which contains a single-block symmetric cipher 518 * definition. See @struct @cipher_alg. 519 * @cra_u.compress: Union member which contains a (de)compression algorithm. 520 * See @struct @compress_alg. 521 * @cra_module: Owner of this transformation implementation. Set to THIS_MODULE 522 * @cra_list: internally used 523 * @cra_users: internally used 524 * @cra_refcnt: internally used 525 * @cra_destroy: internally used 526 * 527 * @stats: union of all possible crypto_istat_xxx structures 528 * @stats.aead: statistics for AEAD algorithm 529 * @stats.akcipher: statistics for akcipher algorithm 530 * @stats.cipher: statistics for cipher algorithm 531 * @stats.compress: statistics for compress algorithm 532 * @stats.hash: statistics for hash algorithm 533 * @stats.rng: statistics for rng algorithm 534 * @stats.kpp: statistics for KPP algorithm 535 * 536 * The struct crypto_alg describes a generic Crypto API algorithm and is common 537 * for all of the transformations. Any variable not documented here shall not 538 * be used by a cipher implementation as it is internal to the Crypto API. 539 */ 540struct crypto_alg { 541 struct list_head cra_list; 542 struct list_head cra_users; 543 544 u32 cra_flags; 545 unsigned int cra_blocksize; 546 unsigned int cra_ctxsize; 547 unsigned int cra_alignmask; 548 549 int cra_priority; 550 refcount_t cra_refcnt; 551 552 char cra_name[CRYPTO_MAX_ALG_NAME]; 553 char cra_driver_name[CRYPTO_MAX_ALG_NAME]; 554 555 const struct crypto_type *cra_type; 556 557 union { 558 struct ablkcipher_alg ablkcipher; 559 struct blkcipher_alg blkcipher; 560 struct cipher_alg cipher; 561 struct compress_alg compress; 562 } cra_u; 563 564 int (*cra_init)(struct crypto_tfm *tfm); 565 void (*cra_exit)(struct crypto_tfm *tfm); 566 void (*cra_destroy)(struct crypto_alg *alg); 567 568 struct module *cra_module; 569 570#ifdef CONFIG_CRYPTO_STATS 571 union { 572 struct crypto_istat_aead aead; 573 struct crypto_istat_akcipher akcipher; 574 struct crypto_istat_cipher cipher; 575 struct crypto_istat_compress compress; 576 struct crypto_istat_hash hash; 577 struct crypto_istat_rng rng; 578 struct crypto_istat_kpp kpp; 579 } stats; 580#endif /* CONFIG_CRYPTO_STATS */ 581 582} CRYPTO_MINALIGN_ATTR; 583 584#ifdef CONFIG_CRYPTO_STATS 585void crypto_stats_init(struct crypto_alg *alg); 586void crypto_stats_get(struct crypto_alg *alg); 587void crypto_stats_ablkcipher_encrypt(unsigned int nbytes, int ret, struct crypto_alg *alg); 588void crypto_stats_ablkcipher_decrypt(unsigned int nbytes, int ret, struct crypto_alg *alg); 589void crypto_stats_aead_encrypt(unsigned int cryptlen, struct crypto_alg *alg, int ret); 590void crypto_stats_aead_decrypt(unsigned int cryptlen, struct crypto_alg *alg, int ret); 591void crypto_stats_ahash_update(unsigned int nbytes, int ret, struct crypto_alg *alg); 592void crypto_stats_ahash_final(unsigned int nbytes, int ret, struct crypto_alg *alg); 593void crypto_stats_akcipher_encrypt(unsigned int src_len, int ret, struct crypto_alg *alg); 594void crypto_stats_akcipher_decrypt(unsigned int src_len, int ret, struct crypto_alg *alg); 595void crypto_stats_akcipher_sign(int ret, struct crypto_alg *alg); 596void crypto_stats_akcipher_verify(int ret, struct crypto_alg *alg); 597void crypto_stats_compress(unsigned int slen, int ret, struct crypto_alg *alg); 598void crypto_stats_decompress(unsigned int slen, int ret, struct crypto_alg *alg); 599void crypto_stats_kpp_set_secret(struct crypto_alg *alg, int ret); 600void crypto_stats_kpp_generate_public_key(struct crypto_alg *alg, int ret); 601void crypto_stats_kpp_compute_shared_secret(struct crypto_alg *alg, int ret); 602void crypto_stats_rng_seed(struct crypto_alg *alg, int ret); 603void crypto_stats_rng_generate(struct crypto_alg *alg, unsigned int dlen, int ret); 604void crypto_stats_skcipher_encrypt(unsigned int cryptlen, int ret, struct crypto_alg *alg); 605void crypto_stats_skcipher_decrypt(unsigned int cryptlen, int ret, struct crypto_alg *alg); 606#else 607static inline void crypto_stats_init(struct crypto_alg *alg) 608{} 609static inline void crypto_stats_get(struct crypto_alg *alg) 610{} 611static inline void crypto_stats_ablkcipher_encrypt(unsigned int nbytes, int ret, struct crypto_alg *alg) 612{} 613static inline void crypto_stats_ablkcipher_decrypt(unsigned int nbytes, int ret, struct crypto_alg *alg) 614{} 615static inline void crypto_stats_aead_encrypt(unsigned int cryptlen, struct crypto_alg *alg, int ret) 616{} 617static inline void crypto_stats_aead_decrypt(unsigned int cryptlen, struct crypto_alg *alg, int ret) 618{} 619static inline void crypto_stats_ahash_update(unsigned int nbytes, int ret, struct crypto_alg *alg) 620{} 621static inline void crypto_stats_ahash_final(unsigned int nbytes, int ret, struct crypto_alg *alg) 622{} 623static inline void crypto_stats_akcipher_encrypt(unsigned int src_len, int ret, struct crypto_alg *alg) 624{} 625static inline void crypto_stats_akcipher_decrypt(unsigned int src_len, int ret, struct crypto_alg *alg) 626{} 627static inline void crypto_stats_akcipher_sign(int ret, struct crypto_alg *alg) 628{} 629static inline void crypto_stats_akcipher_verify(int ret, struct crypto_alg *alg) 630{} 631static inline void crypto_stats_compress(unsigned int slen, int ret, struct crypto_alg *alg) 632{} 633static inline void crypto_stats_decompress(unsigned int slen, int ret, struct crypto_alg *alg) 634{} 635static inline void crypto_stats_kpp_set_secret(struct crypto_alg *alg, int ret) 636{} 637static inline void crypto_stats_kpp_generate_public_key(struct crypto_alg *alg, int ret) 638{} 639static inline void crypto_stats_kpp_compute_shared_secret(struct crypto_alg *alg, int ret) 640{} 641static inline void crypto_stats_rng_seed(struct crypto_alg *alg, int ret) 642{} 643static inline void crypto_stats_rng_generate(struct crypto_alg *alg, unsigned int dlen, int ret) 644{} 645static inline void crypto_stats_skcipher_encrypt(unsigned int cryptlen, int ret, struct crypto_alg *alg) 646{} 647static inline void crypto_stats_skcipher_decrypt(unsigned int cryptlen, int ret, struct crypto_alg *alg) 648{} 649#endif 650/* 651 * A helper struct for waiting for completion of async crypto ops 652 */ 653struct crypto_wait { 654 struct completion completion; 655 int err; 656}; 657 658/* 659 * Macro for declaring a crypto op async wait object on stack 660 */ 661#define DECLARE_CRYPTO_WAIT(_wait) \ 662 struct crypto_wait _wait = { \ 663 COMPLETION_INITIALIZER_ONSTACK((_wait).completion), 0 } 664 665/* 666 * Async ops completion helper functioons 667 */ 668void crypto_req_done(struct crypto_async_request *req, int err); 669 670static inline int crypto_wait_req(int err, struct crypto_wait *wait) 671{ 672 switch (err) { 673 case -EINPROGRESS: 674 case -EBUSY: 675 wait_for_completion(&wait->completion); 676 reinit_completion(&wait->completion); 677 err = wait->err; 678 break; 679 }; 680 681 return err; 682} 683 684static inline void crypto_init_wait(struct crypto_wait *wait) 685{ 686 init_completion(&wait->completion); 687} 688 689/* 690 * Algorithm registration interface. 691 */ 692int crypto_register_alg(struct crypto_alg *alg); 693int crypto_unregister_alg(struct crypto_alg *alg); 694int crypto_register_algs(struct crypto_alg *algs, int count); 695int crypto_unregister_algs(struct crypto_alg *algs, int count); 696 697/* 698 * Algorithm query interface. 699 */ 700int crypto_has_alg(const char *name, u32 type, u32 mask); 701 702/* 703 * Transforms: user-instantiated objects which encapsulate algorithms 704 * and core processing logic. Managed via crypto_alloc_*() and 705 * crypto_free_*(), as well as the various helpers below. 706 */ 707 708struct ablkcipher_tfm { 709 int (*setkey)(struct crypto_ablkcipher *tfm, const u8 *key, 710 unsigned int keylen); 711 int (*encrypt)(struct ablkcipher_request *req); 712 int (*decrypt)(struct ablkcipher_request *req); 713 714 struct crypto_ablkcipher *base; 715 716 unsigned int ivsize; 717 unsigned int reqsize; 718}; 719 720struct blkcipher_tfm { 721 void *iv; 722 int (*setkey)(struct crypto_tfm *tfm, const u8 *key, 723 unsigned int keylen); 724 int (*encrypt)(struct blkcipher_desc *desc, struct scatterlist *dst, 725 struct scatterlist *src, unsigned int nbytes); 726 int (*decrypt)(struct blkcipher_desc *desc, struct scatterlist *dst, 727 struct scatterlist *src, unsigned int nbytes); 728}; 729 730struct cipher_tfm { 731 int (*cit_setkey)(struct crypto_tfm *tfm, 732 const u8 *key, unsigned int keylen); 733 void (*cit_encrypt_one)(struct crypto_tfm *tfm, u8 *dst, const u8 *src); 734 void (*cit_decrypt_one)(struct crypto_tfm *tfm, u8 *dst, const u8 *src); 735}; 736 737struct compress_tfm { 738 int (*cot_compress)(struct crypto_tfm *tfm, 739 const u8 *src, unsigned int slen, 740 u8 *dst, unsigned int *dlen); 741 int (*cot_decompress)(struct crypto_tfm *tfm, 742 const u8 *src, unsigned int slen, 743 u8 *dst, unsigned int *dlen); 744}; 745 746#define crt_ablkcipher crt_u.ablkcipher 747#define crt_blkcipher crt_u.blkcipher 748#define crt_cipher crt_u.cipher 749#define crt_compress crt_u.compress 750 751struct crypto_tfm { 752 753 u32 crt_flags; 754 755 union { 756 struct ablkcipher_tfm ablkcipher; 757 struct blkcipher_tfm blkcipher; 758 struct cipher_tfm cipher; 759 struct compress_tfm compress; 760 } crt_u; 761 762 void (*exit)(struct crypto_tfm *tfm); 763 764 struct crypto_alg *__crt_alg; 765 766 void *__crt_ctx[] CRYPTO_MINALIGN_ATTR; 767}; 768 769struct crypto_ablkcipher { 770 struct crypto_tfm base; 771}; 772 773struct crypto_blkcipher { 774 struct crypto_tfm base; 775}; 776 777struct crypto_cipher { 778 struct crypto_tfm base; 779}; 780 781struct crypto_comp { 782 struct crypto_tfm base; 783}; 784 785enum { 786 CRYPTOA_UNSPEC, 787 CRYPTOA_ALG, 788 CRYPTOA_TYPE, 789 CRYPTOA_U32, 790 __CRYPTOA_MAX, 791}; 792 793#define CRYPTOA_MAX (__CRYPTOA_MAX - 1) 794 795/* Maximum number of (rtattr) parameters for each template. */ 796#define CRYPTO_MAX_ATTRS 32 797 798struct crypto_attr_alg { 799 char name[CRYPTO_MAX_ALG_NAME]; 800}; 801 802struct crypto_attr_type { 803 u32 type; 804 u32 mask; 805}; 806 807struct crypto_attr_u32 { 808 u32 num; 809}; 810 811/* 812 * Transform user interface. 813 */ 814 815struct crypto_tfm *crypto_alloc_base(const char *alg_name, u32 type, u32 mask); 816void crypto_destroy_tfm(void *mem, struct crypto_tfm *tfm); 817 818static inline void crypto_free_tfm(struct crypto_tfm *tfm) 819{ 820 return crypto_destroy_tfm(tfm, tfm); 821} 822 823int alg_test(const char *driver, const char *alg, u32 type, u32 mask); 824 825/* 826 * Transform helpers which query the underlying algorithm. 827 */ 828static inline const char *crypto_tfm_alg_name(struct crypto_tfm *tfm) 829{ 830 return tfm->__crt_alg->cra_name; 831} 832 833static inline const char *crypto_tfm_alg_driver_name(struct crypto_tfm *tfm) 834{ 835 return tfm->__crt_alg->cra_driver_name; 836} 837 838static inline int crypto_tfm_alg_priority(struct crypto_tfm *tfm) 839{ 840 return tfm->__crt_alg->cra_priority; 841} 842 843static inline u32 crypto_tfm_alg_type(struct crypto_tfm *tfm) 844{ 845 return tfm->__crt_alg->cra_flags & CRYPTO_ALG_TYPE_MASK; 846} 847 848static inline unsigned int crypto_tfm_alg_blocksize(struct crypto_tfm *tfm) 849{ 850 return tfm->__crt_alg->cra_blocksize; 851} 852 853static inline unsigned int crypto_tfm_alg_alignmask(struct crypto_tfm *tfm) 854{ 855 return tfm->__crt_alg->cra_alignmask; 856} 857 858static inline u32 crypto_tfm_get_flags(struct crypto_tfm *tfm) 859{ 860 return tfm->crt_flags; 861} 862 863static inline void crypto_tfm_set_flags(struct crypto_tfm *tfm, u32 flags) 864{ 865 tfm->crt_flags |= flags; 866} 867 868static inline void crypto_tfm_clear_flags(struct crypto_tfm *tfm, u32 flags) 869{ 870 tfm->crt_flags &= ~flags; 871} 872 873static inline void *crypto_tfm_ctx(struct crypto_tfm *tfm) 874{ 875 return tfm->__crt_ctx; 876} 877 878static inline unsigned int crypto_tfm_ctx_alignment(void) 879{ 880 struct crypto_tfm *tfm; 881 return __alignof__(tfm->__crt_ctx); 882} 883 884/* 885 * API wrappers. 886 */ 887static inline struct crypto_ablkcipher *__crypto_ablkcipher_cast( 888 struct crypto_tfm *tfm) 889{ 890 return (struct crypto_ablkcipher *)tfm; 891} 892 893static inline u32 crypto_skcipher_type(u32 type) 894{ 895 type &= ~CRYPTO_ALG_TYPE_MASK; 896 type |= CRYPTO_ALG_TYPE_BLKCIPHER; 897 return type; 898} 899 900static inline u32 crypto_skcipher_mask(u32 mask) 901{ 902 mask &= ~CRYPTO_ALG_TYPE_MASK; 903 mask |= CRYPTO_ALG_TYPE_BLKCIPHER_MASK; 904 return mask; 905} 906 907/** 908 * DOC: Asynchronous Block Cipher API 909 * 910 * Asynchronous block cipher API is used with the ciphers of type 911 * CRYPTO_ALG_TYPE_ABLKCIPHER (listed as type "ablkcipher" in /proc/crypto). 912 * 913 * Asynchronous cipher operations imply that the function invocation for a 914 * cipher request returns immediately before the completion of the operation. 915 * The cipher request is scheduled as a separate kernel thread and therefore 916 * load-balanced on the different CPUs via the process scheduler. To allow 917 * the kernel crypto API to inform the caller about the completion of a cipher 918 * request, the caller must provide a callback function. That function is 919 * invoked with the cipher handle when the request completes. 920 * 921 * To support the asynchronous operation, additional information than just the 922 * cipher handle must be supplied to the kernel crypto API. That additional 923 * information is given by filling in the ablkcipher_request data structure. 924 * 925 * For the asynchronous block cipher API, the state is maintained with the tfm 926 * cipher handle. A single tfm can be used across multiple calls and in 927 * parallel. For asynchronous block cipher calls, context data supplied and 928 * only used by the caller can be referenced the request data structure in 929 * addition to the IV used for the cipher request. The maintenance of such 930 * state information would be important for a crypto driver implementer to 931 * have, because when calling the callback function upon completion of the 932 * cipher operation, that callback function may need some information about 933 * which operation just finished if it invoked multiple in parallel. This 934 * state information is unused by the kernel crypto API. 935 */ 936 937static inline struct crypto_tfm *crypto_ablkcipher_tfm( 938 struct crypto_ablkcipher *tfm) 939{ 940 return &tfm->base; 941} 942 943/** 944 * crypto_free_ablkcipher() - zeroize and free cipher handle 945 * @tfm: cipher handle to be freed 946 */ 947static inline void crypto_free_ablkcipher(struct crypto_ablkcipher *tfm) 948{ 949 crypto_free_tfm(crypto_ablkcipher_tfm(tfm)); 950} 951 952/** 953 * crypto_has_ablkcipher() - Search for the availability of an ablkcipher. 954 * @alg_name: is the cra_name / name or cra_driver_name / driver name of the 955 * ablkcipher 956 * @type: specifies the type of the cipher 957 * @mask: specifies the mask for the cipher 958 * 959 * Return: true when the ablkcipher is known to the kernel crypto API; false 960 * otherwise 961 */ 962static inline int crypto_has_ablkcipher(const char *alg_name, u32 type, 963 u32 mask) 964{ 965 return crypto_has_alg(alg_name, crypto_skcipher_type(type), 966 crypto_skcipher_mask(mask)); 967} 968 969static inline struct ablkcipher_tfm *crypto_ablkcipher_crt( 970 struct crypto_ablkcipher *tfm) 971{ 972 return &crypto_ablkcipher_tfm(tfm)->crt_ablkcipher; 973} 974 975/** 976 * crypto_ablkcipher_ivsize() - obtain IV size 977 * @tfm: cipher handle 978 * 979 * The size of the IV for the ablkcipher referenced by the cipher handle is 980 * returned. This IV size may be zero if the cipher does not need an IV. 981 * 982 * Return: IV size in bytes 983 */ 984static inline unsigned int crypto_ablkcipher_ivsize( 985 struct crypto_ablkcipher *tfm) 986{ 987 return crypto_ablkcipher_crt(tfm)->ivsize; 988} 989 990/** 991 * crypto_ablkcipher_blocksize() - obtain block size of cipher 992 * @tfm: cipher handle 993 * 994 * The block size for the ablkcipher referenced with the cipher handle is 995 * returned. The caller may use that information to allocate appropriate 996 * memory for the data returned by the encryption or decryption operation 997 * 998 * Return: block size of cipher 999 */ 1000static inline unsigned int crypto_ablkcipher_blocksize(
1001 struct crypto_ablkcipher *tfm) 1002{ 1003 return crypto_tfm_alg_blocksize(crypto_ablkcipher_tfm(tfm)); 1004} 1005 1006static inline unsigned int crypto_ablkcipher_alignmask( 1007 struct crypto_ablkcipher *tfm) 1008{ 1009 return crypto_tfm_alg_alignmask(crypto_ablkcipher_tfm(tfm)); 1010} 1011 1012static inline u32 crypto_ablkcipher_get_flags(struct crypto_ablkcipher *tfm) 1013{ 1014 return crypto_tfm_get_flags(crypto_ablkcipher_tfm(tfm)); 1015} 1016 1017static inline void crypto_ablkcipher_set_flags(struct crypto_ablkcipher *tfm, 1018 u32 flags) 1019{ 1020 crypto_tfm_set_flags(crypto_ablkcipher_tfm(tfm), flags); 1021} 1022 1023static inline void crypto_ablkcipher_clear_flags(struct crypto_ablkcipher *tfm, 1024 u32 flags) 1025{ 1026 crypto_tfm_clear_flags(crypto_ablkcipher_tfm(tfm), flags); 1027} 1028 1029/** 1030 * crypto_ablkcipher_setkey() - set key for cipher 1031 * @tfm: cipher handle 1032 * @key: buffer holding the key 1033 * @keylen: length of the key in bytes 1034 * 1035 * The caller provided key is set for the ablkcipher referenced by the cipher 1036 * handle. 1037 * 1038 * Note, the key length determines the cipher type. Many block ciphers implement 1039 * different cipher modes depending on the key size, such as AES-128 vs AES-192 1040 * vs. AES-256. When providing a 16 byte key for an AES cipher handle, AES-128 1041 * is performed. 1042 * 1043 * Return: 0 if the setting of the key was successful; < 0 if an error occurred 1044 */ 1045static inline int crypto_ablkcipher_setkey(struct crypto_ablkcipher *tfm, 1046 const u8 *key, unsigned int keylen) 1047{ 1048 struct ablkcipher_tfm *crt = crypto_ablkcipher_crt(tfm); 1049 1050 return crt->setkey(crt->base, key, keylen); 1051} 1052 1053/** 1054 * crypto_ablkcipher_reqtfm() - obtain cipher handle from request 1055 * @req: ablkcipher_request out of which the cipher handle is to be obtained 1056 * 1057 * Return the crypto_ablkcipher handle when furnishing an ablkcipher_request 1058 * data structure. 1059 * 1060 * Return: crypto_ablkcipher handle 1061 */ 1062static inline struct crypto_ablkcipher *crypto_ablkcipher_reqtfm( 1063 struct ablkcipher_request *req) 1064{ 1065 return __crypto_ablkcipher_cast(req->base.tfm); 1066} 1067 1068/** 1069 * crypto_ablkcipher_encrypt() - encrypt plaintext 1070 * @req: reference to the ablkcipher_request handle that holds all information 1071 * needed to perform the cipher operation 1072 * 1073 * Encrypt plaintext data using the ablkcipher_request handle. That data 1074 * structure and how it is filled with data is discussed with the 1075 * ablkcipher_request_* functions. 1076 * 1077 * Return: 0 if the cipher operation was successful; < 0 if an error occurred 1078 */ 1079static inline int crypto_ablkcipher_encrypt(struct ablkcipher_request *req) 1080{ 1081 struct ablkcipher_tfm *crt = 1082 crypto_ablkcipher_crt(crypto_ablkcipher_reqtfm(req)); 1083 struct crypto_alg *alg = crt->base->base.__crt_alg; 1084 unsigned int nbytes = req->nbytes; 1085 int ret; 1086 1087 crypto_stats_get(alg); 1088 ret = crt->encrypt(req); 1089 crypto_stats_ablkcipher_encrypt(nbytes, ret, alg); 1090 return ret; 1091} 1092 1093/** 1094 * crypto_ablkcipher_decrypt() - decrypt ciphertext 1095 * @req: reference to the ablkcipher_request handle that holds all information 1096 * needed to perform the cipher operation 1097 * 1098 * Decrypt ciphertext data using the ablkcipher_request handle. That data 1099 * structure and how it is filled with data is discussed with the 1100 * ablkcipher_request_* functions. 1101 * 1102 * Return: 0 if the cipher operation was successful; < 0 if an error occurred 1103 */ 1104static inline int crypto_ablkcipher_decrypt(struct ablkcipher_request *req) 1105{ 1106 struct ablkcipher_tfm *crt = 1107 crypto_ablkcipher_crt(crypto_ablkcipher_reqtfm(req)); 1108 struct crypto_alg *alg = crt->base->base.__crt_alg; 1109 unsigned int nbytes = req->nbytes; 1110 int ret; 1111 1112 crypto_stats_get(alg); 1113 ret = crt->decrypt(req); 1114 crypto_stats_ablkcipher_decrypt(nbytes, ret, alg); 1115 return ret; 1116} 1117 1118/** 1119 * DOC: Asynchronous Cipher Request Handle 1120 * 1121 * The ablkcipher_request data structure contains all pointers to data 1122 * required for the asynchronous cipher operation. This includes the cipher 1123 * handle (which can be used by multiple ablkcipher_request instances), pointer 1124 * to plaintext and ciphertext, asynchronous callback function, etc. It acts 1125 * as a handle to the ablkcipher_request_* API calls in a similar way as 1126 * ablkcipher handle to the crypto_ablkcipher_* API calls. 1127 */ 1128 1129/** 1130 * crypto_ablkcipher_reqsize() - obtain size of the request data structure 1131 * @tfm: cipher handle 1132 * 1133 * Return: number of bytes 1134 */ 1135static inline unsigned int crypto_ablkcipher_reqsize( 1136 struct crypto_ablkcipher *tfm) 1137{ 1138 return crypto_ablkcipher_crt(tfm)->reqsize; 1139} 1140 1141/** 1142 * ablkcipher_request_set_tfm() - update cipher handle reference in request 1143 * @req: request handle to be modified 1144 * @tfm: cipher handle that shall be added to the request handle 1145 * 1146 * Allow the caller to replace the existing ablkcipher handle in the request 1147 * data structure with a different one. 1148 */ 1149static inline void ablkcipher_request_set_tfm( 1150 struct ablkcipher_request *req, struct crypto_ablkcipher *tfm) 1151{ 1152 req->base.tfm = crypto_ablkcipher_tfm(crypto_ablkcipher_crt(tfm)->base); 1153} 1154 1155static inline struct ablkcipher_request *ablkcipher_request_cast( 1156 struct crypto_async_request *req) 1157{ 1158 return container_of(req, struct ablkcipher_request, base); 1159} 1160 1161/** 1162 * ablkcipher_request_alloc() - allocate request data structure 1163 * @tfm: cipher handle to be registered with the request 1164 * @gfp: memory allocation flag that is handed to kmalloc by the API call. 1165 * 1166 * Allocate the request data structure that must be used with the ablkcipher 1167 * encrypt and decrypt API calls. During the allocation, the provided ablkcipher 1168 * handle is registered in the request data structure. 1169 * 1170 * Return: allocated request handle in case of success, or NULL if out of memory 1171 */ 1172static inline struct ablkcipher_request *ablkcipher_request_alloc( 1173 struct crypto_ablkcipher *tfm, gfp_t gfp) 1174{ 1175 struct ablkcipher_request *req; 1176 1177 req = kmalloc(sizeof(struct ablkcipher_request) + 1178 crypto_ablkcipher_reqsize(tfm), gfp); 1179 1180 if (likely(req)) 1181 ablkcipher_request_set_tfm(req, tfm); 1182 1183 return req; 1184} 1185 1186/** 1187 * ablkcipher_request_free() - zeroize and free request data structure 1188 * @req: request data structure cipher handle to be freed 1189 */ 1190static inline void ablkcipher_request_free(struct ablkcipher_request *req) 1191{ 1192 kzfree(req); 1193} 1194 1195/** 1196 * ablkcipher_request_set_callback() - set asynchronous callback function 1197 * @req: request handle 1198 * @flags: specify zero or an ORing of the flags 1199 * CRYPTO_TFM_REQ_MAY_BACKLOG the request queue may back log and 1200 * increase the wait queue beyond the initial maximum size; 1201 * CRYPTO_TFM_REQ_MAY_SLEEP the request processing may sleep 1202 * @compl: callback function pointer to be registered with the request handle 1203 * @data: The data pointer refers to memory that is not used by the kernel 1204 * crypto API, but provided to the callback function for it to use. Here, 1205 * the caller can provide a reference to memory the callback function can 1206 * operate on. As the callback function is invoked asynchronously to the 1207 * related functionality, it may need to access data structures of the 1208 * related functionality which can be referenced using this pointer. The 1209 * callback function can access the memory via the "data" field in the 1210 * crypto_async_request data structure provided to the callback function. 1211 * 1212 * This function allows setting the callback function that is triggered once the 1213 * cipher operation completes. 1214 * 1215 * The callback function is registered with the ablkcipher_request handle and 1216 * must comply with the following template:: 1217 * 1218 * void callback_function(struct crypto_async_request *req, int error) 1219 */ 1220static inline void ablkcipher_request_set_callback( 1221 struct ablkcipher_request *req, 1222 u32 flags, crypto_completion_t compl, void *data) 1223{ 1224 req->base.complete = compl; 1225 req->base.data = data; 1226 req->base.flags = flags; 1227} 1228 1229/** 1230 * ablkcipher_request_set_crypt() - set data buffers 1231 * @req: request handle 1232 * @src: source scatter / gather list 1233 * @dst: destination scatter / gather list 1234 * @nbytes: number of bytes to process from @src 1235 * @iv: IV for the cipher operation which must comply with the IV size defined 1236 * by crypto_ablkcipher_ivsize 1237 * 1238 * This function allows setting of the source data and destination data 1239 * scatter / gather lists. 1240 * 1241 * For encryption, the source is treated as the plaintext and the 1242 * destination is the ciphertext. For a decryption operation, the use is 1243 * reversed - the source is the ciphertext and the destination is the plaintext. 1244 */ 1245static inline void ablkcipher_request_set_crypt( 1246 struct ablkcipher_request *req, 1247 struct scatterlist *src, struct scatterlist *dst, 1248 unsigned int nbytes, void *iv) 1249{ 1250 req->src = src; 1251 req->dst = dst; 1252 req->nbytes = nbytes; 1253 req->info = iv; 1254} 1255 1256/** 1257 * DOC: Synchronous Block Cipher API 1258 * 1259 * The synchronous block cipher API is used with the ciphers of type 1260 * CRYPTO_ALG_TYPE_BLKCIPHER (listed as type "blkcipher" in /proc/crypto) 1261 * 1262 * Synchronous calls, have a context in the tfm. But since a single tfm can be 1263 * used in multiple calls and in parallel, this info should not be changeable 1264 * (unless a lock is used). This applies, for example, to the symmetric key. 1265 * However, the IV is changeable, so there is an iv field in blkcipher_tfm 1266 * structure for synchronous blkcipher api. So, its the only state info that can 1267 * be kept for synchronous calls without using a big lock across a tfm. 1268 * 1269 * The block cipher API allows the use of a complete cipher, i.e. a cipher 1270 * consisting of a template (a block chaining mode) and a single block cipher 1271 * primitive (e.g. AES). 1272 * 1273 * The plaintext data buffer and the ciphertext data buffer are pointed to 1274 * by using scatter/gather lists. The cipher operation is performed 1275 * on all segments of the provided scatter/gather lists. 1276 * 1277 * The kernel crypto API supports a cipher operation "in-place" which means that 1278 * the caller may provide the same scatter/gather list for the plaintext and 1279 * cipher text. After the completion of the cipher operation, the plaintext 1280 * data is replaced with the ciphertext data in case of an encryption and vice 1281 * versa for a decryption. The caller must ensure that the scatter/gather lists 1282 * for the output data point to sufficiently large buffers, i.e. multiples of 1283 * the block size of the cipher. 1284 */ 1285 1286static inline struct crypto_blkcipher *__crypto_blkcipher_cast( 1287 struct crypto_tfm *tfm) 1288{ 1289 return (struct crypto_blkcipher *)tfm; 1290} 1291 1292static inline struct crypto_blkcipher *crypto_blkcipher_cast( 1293 struct crypto_tfm *tfm) 1294{ 1295 BUG_ON(crypto_tfm_alg_type(tfm) != CRYPTO_ALG_TYPE_BLKCIPHER); 1296 return __crypto_blkcipher_cast(tfm); 1297} 1298 1299/** 1300 * crypto_alloc_blkcipher() - allocate synchronous block cipher handle 1301 * @alg_name: is the cra_name / name or cra_driver_name / driver name of the 1302 * blkcipher cipher 1303 * @type: specifies the type of the cipher 1304 * @mask: specifies the mask for the cipher 1305 * 1306 * Allocate a cipher handle for a block cipher. The returned struct 1307 * crypto_blkcipher is the cipher handle that is required for any subsequent 1308 * API invocation for that block cipher. 1309 * 1310 * Return: allocated cipher handle in case of success; IS_ERR() is true in case 1311 * of an error, PTR_ERR() returns the error code. 1312 */ 1313static inline struct crypto_blkcipher *crypto_alloc_blkcipher( 1314 const char *alg_name, u32 type, u32 mask) 1315{ 1316 type &= ~CRYPTO_ALG_TYPE_MASK; 1317 type |= CRYPTO_ALG_TYPE_BLKCIPHER; 1318 mask |= CRYPTO_ALG_TYPE_MASK; 1319 1320 return __crypto_blkcipher_cast(crypto_alloc_base(alg_name, type, mask)); 1321} 1322 1323static inline struct crypto_tfm *crypto_blkcipher_tfm( 1324 struct crypto_blkcipher *tfm) 1325{ 1326 return &tfm->base; 1327} 1328 1329/** 1330 * crypto_free_blkcipher() - zeroize and free the block cipher handle 1331 * @tfm: cipher handle to be freed 1332 */ 1333static inline void crypto_free_blkcipher(struct crypto_blkcipher *tfm) 1334{ 1335 crypto_free_tfm(crypto_blkcipher_tfm(tfm)); 1336} 1337 1338/** 1339 * crypto_has_blkcipher() - Search for the availability of a block cipher 1340 * @alg_name: is the cra_name / name or cra_driver_name / driver name of the 1341 * block cipher 1342 * @type: specifies the type of the cipher 1343 * @mask: specifies the mask for the cipher 1344 * 1345 * Return: true when the block cipher is known to the kernel crypto API; false 1346 * otherwise 1347 */ 1348static inline int crypto_has_blkcipher(const char *alg_name, u32 type, u32 mask) 1349{ 1350 type &= ~CRYPTO_ALG_TYPE_MASK; 1351 type |= CRYPTO_ALG_TYPE_BLKCIPHER; 1352 mask |= CRYPTO_ALG_TYPE_MASK; 1353 1354 return crypto_has_alg(alg_name, type, mask); 1355} 1356 1357/** 1358 * crypto_blkcipher_name() - return the name / cra_name from the cipher handle 1359 * @tfm: cipher handle 1360 * 1361 * Return: The character string holding the name of the cipher 1362 */ 1363static inline const char *crypto_blkcipher_name(struct crypto_blkcipher *tfm) 1364{ 1365 return crypto_tfm_alg_name(crypto_blkcipher_tfm(tfm)); 1366} 1367 1368static inline struct blkcipher_tfm *crypto_blkcipher_crt( 1369 struct crypto_blkcipher *tfm) 1370{ 1371 return &crypto_blkcipher_tfm(tfm)->crt_blkcipher; 1372} 1373 1374static inline struct blkcipher_alg *crypto_blkcipher_alg( 1375 struct crypto_blkcipher *tfm) 1376{ 1377 return &crypto_blkcipher_tfm(tfm)->__crt_alg->cra_blkcipher; 1378} 1379 1380/** 1381 * crypto_blkcipher_ivsize() - obtain IV size 1382 * @tfm: cipher handle 1383 * 1384 * The size of the IV for the block cipher referenced by the cipher handle is 1385 * returned. This IV size may be zero if the cipher does not need an IV. 1386 * 1387 * Return: IV size in bytes 1388 */ 1389static inline unsigned int crypto_blkcipher_ivsize(struct crypto_blkcipher *tfm) 1390{ 1391 return crypto_blkcipher_alg(tfm)->ivsize; 1392} 1393 1394/** 1395 * crypto_blkcipher_blocksize() - obtain block size of cipher 1396 * @tfm: cipher handle 1397 * 1398 * The block size for the block cipher referenced with the cipher handle is 1399 * returned. The caller may use that information to allocate appropriate 1400 * memory for the data returned by the encryption or decryption operation. 1401 * 1402 * Return: block size of cipher 1403 */ 1404static inline unsigned int crypto_blkcipher_blocksize( 1405 struct crypto_blkcipher *tfm) 1406{ 1407 return crypto_tfm_alg_blocksize(crypto_blkcipher_tfm(tfm)); 1408} 1409 1410static inline unsigned int crypto_blkcipher_alignmask( 1411 struct crypto_blkcipher *tfm) 1412{ 1413 return crypto_tfm_alg_alignmask(crypto_blkcipher_tfm(tfm)); 1414} 1415 1416static inline u32 crypto_blkcipher_get_flags(struct crypto_blkcipher *tfm) 1417{ 1418 return crypto_tfm_get_flags(crypto_blkcipher_tfm(tfm)); 1419} 1420 1421static inline void crypto_blkcipher_set_flags(struct crypto_blkcipher *tfm, 1422 u32 flags) 1423{ 1424 crypto_tfm_set_flags(crypto_blkcipher_tfm(tfm), flags); 1425} 1426 1427static inline void crypto_blkcipher_clear_flags(struct crypto_blkcipher *tfm, 1428 u32 flags) 1429{ 1430 crypto_tfm_clear_flags(crypto_blkcipher_tfm(tfm), flags); 1431} 1432 1433/** 1434 * crypto_blkcipher_setkey() - set key for cipher 1435 * @tfm: cipher handle 1436 * @key: buffer holding the key 1437 * @keylen: length of the key in bytes 1438 * 1439 * The caller provided key is set for the block cipher referenced by the cipher 1440 * handle. 1441 * 1442 * Note, the key length determines the cipher type. Many block ciphers implement 1443 * different cipher modes depending on the key size, such as AES-128 vs AES-192 1444 * vs. AES-256. When providing a 16 byte key for an AES cipher handle, AES-128 1445 * is performed. 1446 * 1447 * Return: 0 if the setting of the key was successful; < 0 if an error occurred 1448 */ 1449static inline int crypto_blkcipher_setkey(struct crypto_blkcipher *tfm, 1450 const u8 *key, unsigned int keylen) 1451{ 1452 return crypto_blkcipher_crt(tfm)->setkey(crypto_blkcipher_tfm(tfm), 1453 key, keylen); 1454} 1455 1456/** 1457 * crypto_blkcipher_encrypt() - encrypt plaintext 1458 * @desc: reference to the block cipher handle with meta data 1459 * @dst: scatter/gather list that is filled by the cipher operation with the 1460 * ciphertext 1461 * @src: scatter/gather list that holds the plaintext 1462 * @nbytes: number of bytes of the plaintext to encrypt. 1463 * 1464 * Encrypt plaintext data using the IV set by the caller with a preceding 1465 * call of crypto_blkcipher_set_iv. 1466 * 1467 * The blkcipher_desc data structure must be filled by the caller and can 1468 * reside on the stack. The caller must fill desc as follows: desc.tfm is filled 1469 * with the block cipher handle; desc.flags is filled with either 1470 * CRYPTO_TFM_REQ_MAY_SLEEP or 0. 1471 * 1472 * Return: 0 if the cipher operation was successful; < 0 if an error occurred 1473 */ 1474static inline int crypto_blkcipher_encrypt(struct blkcipher_desc *desc, 1475 struct scatterlist *dst, 1476 struct scatterlist *src, 1477 unsigned int nbytes) 1478{ 1479 desc->info = crypto_blkcipher_crt(desc->tfm)->iv; 1480 return crypto_blkcipher_crt(desc->tfm)->encrypt(desc, dst, src, nbytes); 1481} 1482 1483/** 1484 * crypto_blkcipher_encrypt_iv() - encrypt plaintext with dedicated IV 1485 * @desc: reference to the block cipher handle with meta data 1486 * @dst: scatter/gather list that is filled by the cipher operation with the 1487 * ciphertext 1488 * @src: scatter/gather list that holds the plaintext 1489 * @nbytes: number of bytes of the plaintext to encrypt. 1490 * 1491 * Encrypt plaintext data with the use of an IV that is solely used for this 1492 * cipher operation. Any previously set IV is not used. 1493 * 1494 * The blkcipher_desc data structure must be filled by the caller and can 1495 * reside on the stack. The caller must fill desc as follows: desc.tfm is filled 1496 * with the block cipher handle; desc.info is filled with the IV to be used for 1497 * the current operation; desc.flags is filled with either 1498 * CRYPTO_TFM_REQ_MAY_SLEEP or 0. 1499 * 1500 * Return: 0 if the cipher operation was successful; < 0 if an error occurred 1501 */ 1502static inline int crypto_blkcipher_encrypt_iv(struct blkcipher_desc *desc, 1503 struct scatterlist *dst, 1504 struct scatterlist *src, 1505 unsigned int nbytes) 1506{ 1507 return crypto_blkcipher_crt(desc->tfm)->encrypt(desc, dst, src, nbytes); 1508} 1509 1510/** 1511 * crypto_blkcipher_decrypt() - decrypt ciphertext 1512 * @desc: reference to the block cipher handle with meta data 1513 * @dst: scatter/gather list that is filled by the cipher operation with the 1514 * plaintext 1515 * @src: scatter/gather list that holds the ciphertext 1516 * @nbytes: number of bytes of the ciphertext to decrypt. 1517 * 1518 * Decrypt ciphertext data using the IV set by the caller with a preceding 1519 * call of crypto_blkcipher_set_iv. 1520 * 1521 * The blkcipher_desc data structure must be filled by the caller as documented 1522 * for the crypto_blkcipher_encrypt call above. 1523 * 1524 * Return: 0 if the cipher operation was successful; < 0 if an error occurred 1525 * 1526 */ 1527static inline int crypto_blkcipher_decrypt(struct blkcipher_desc *desc, 1528 struct scatterlist *dst, 1529 struct scatterlist *src, 1530 unsigned int nbytes) 1531{ 1532 desc->info = crypto_blkcipher_crt(desc->tfm)->iv; 1533 return crypto_blkcipher_crt(desc->tfm)->decrypt(desc, dst, src, nbytes); 1534} 1535 1536/** 1537 * crypto_blkcipher_decrypt_iv() - decrypt ciphertext with dedicated IV 1538 * @desc: reference to the block cipher handle with meta data 1539 * @dst: scatter/gather list that is filled by the cipher operation with the 1540 * plaintext 1541 * @src: scatter/gather list that holds the ciphertext 1542 * @nbytes: number of bytes of the ciphertext to decrypt. 1543 * 1544 * Decrypt ciphertext data with the use of an IV that is solely used for this 1545 * cipher operation. Any previously set IV is not used. 1546 * 1547 * The blkcipher_desc data structure must be filled by the caller as documented 1548 * for the crypto_blkcipher_encrypt_iv call above. 1549 * 1550 * Return: 0 if the cipher operation was successful; < 0 if an error occurred 1551 */ 1552static inline int crypto_blkcipher_decrypt_iv(struct blkcipher_desc *desc, 1553 struct scatterlist *dst, 1554 struct scatterlist *src, 1555 unsigned int nbytes) 1556{ 1557 return crypto_blkcipher_crt(desc->tfm)->decrypt(desc, dst, src, nbytes); 1558} 1559 1560/** 1561 * crypto_blkcipher_set_iv() - set IV for cipher 1562 * @tfm: cipher handle 1563 * @src: buffer holding the IV 1564 * @len: length of the IV in bytes 1565 * 1566 * The caller provided IV is set for the block cipher referenced by the cipher 1567 * handle. 1568 */ 1569static inline void crypto_blkcipher_set_iv(struct crypto_blkcipher *tfm, 1570 const u8 *src, unsigned int len) 1571{ 1572 memcpy(crypto_blkcipher_crt(tfm)->iv, src, len); 1573} 1574 1575/** 1576 * crypto_blkcipher_get_iv() - obtain IV from cipher 1577 * @tfm: cipher handle 1578 * @dst: buffer filled with the IV 1579 * @len: length of the buffer dst 1580 * 1581 * The caller can obtain the IV set for the block cipher referenced by the 1582 * cipher handle and store it into the user-provided buffer. If the buffer 1583 * has an insufficient space, the IV is truncated to fit the buffer. 1584 */ 1585static inline void crypto_blkcipher_get_iv(struct crypto_blkcipher *tfm, 1586 u8 *dst, unsigned int len) 1587{ 1588 memcpy(dst, crypto_blkcipher_crt(tfm)->iv, len); 1589} 1590 1591/** 1592 * DOC: Single Block Cipher API 1593 * 1594 * The single block cipher API is used with the ciphers of type 1595 * CRYPTO_ALG_TYPE_CIPHER (listed as type "cipher" in /proc/crypto). 1596 * 1597 * Using the single block cipher API calls, operations with the basic cipher 1598 * primitive can be implemented. These cipher primitives exclude any block 1599 * chaining operations including IV handling. 1600 * 1601 * The purpose of this single block cipher API is to support the implementation 1602 * of templates or other concepts that only need to perform the cipher operation 1603 * on one block at a time. Templates invoke the underlying cipher primitive 1604 * block-wise and process either the input or the output data of these cipher 1605 * operations. 1606 */ 1607 1608static inline struct crypto_cipher *__crypto_cipher_cast(struct crypto_tfm *tfm) 1609{ 1610 return (struct crypto_cipher *)tfm; 1611} 1612 1613static inline struct crypto_cipher *crypto_cipher_cast(struct crypto_tfm *tfm) 1614{ 1615 BUG_ON(crypto_tfm_alg_type(tfm) != CRYPTO_ALG_TYPE_CIPHER); 1616 return __crypto_cipher_cast(tfm); 1617} 1618 1619/** 1620 * crypto_alloc_cipher() - allocate single block cipher handle 1621 * @alg_name: is the cra_name / name or cra_driver_name / driver name of the 1622 * single block cipher 1623 * @type: specifies the type of the cipher 1624 * @mask: specifies the mask for the cipher 1625 * 1626 * Allocate a cipher handle for a single block cipher. The returned struct 1627 * crypto_cipher is the cipher handle that is required for any subsequent API 1628 * invocation for that single block cipher. 1629 * 1630 * Return: allocated cipher handle in case of success; IS_ERR() is true in case 1631 * of an error, PTR_ERR() returns the error code. 1632 */ 1633static inline struct crypto_cipher *crypto_alloc_cipher(const char *alg_name, 1634 u32 type, u32 mask) 1635{ 1636 type &= ~CRYPTO_ALG_TYPE_MASK; 1637 type |= CRYPTO_ALG_TYPE_CIPHER; 1638 mask |= CRYPTO_ALG_TYPE_MASK; 1639 1640 return __crypto_cipher_cast(crypto_alloc_base(alg_name, type, mask)); 1641} 1642 1643static inline struct crypto_tfm *crypto_cipher_tfm(struct crypto_cipher *tfm) 1644{ 1645 return &tfm->base; 1646} 1647 1648/** 1649 * crypto_free_cipher() - zeroize and free the single block cipher handle 1650 * @tfm: cipher handle to be freed 1651 */ 1652static inline void crypto_free_cipher(struct crypto_cipher *tfm) 1653{ 1654 crypto_free_tfm(crypto_cipher_tfm(tfm)); 1655} 1656 1657/** 1658 * crypto_has_cipher() - Search for the availability of a single block cipher 1659 * @alg_name: is the cra_name / name or cra_driver_name / driver name of the 1660 * single block cipher 1661 * @type: specifies the type of the cipher 1662 * @mask: specifies the mask for the cipher 1663 * 1664 * Return: true when the single block cipher is known to the kernel crypto API; 1665 * false otherwise 1666 */ 1667static inline int crypto_has_cipher(const char *alg_name, u32 type, u32 mask) 1668{ 1669 type &= ~CRYPTO_ALG_TYPE_MASK; 1670 type |= CRYPTO_ALG_TYPE_CIPHER; 1671 mask |= CRYPTO_ALG_TYPE_MASK; 1672 1673 return crypto_has_alg(alg_name, type, mask); 1674} 1675 1676static inline struct cipher_tfm *crypto_cipher_crt(struct crypto_cipher *tfm) 1677{ 1678 return &crypto_cipher_tfm(tfm)->crt_cipher; 1679} 1680 1681/** 1682 * crypto_cipher_blocksize() - obtain block size for cipher 1683 * @tfm: cipher handle 1684 * 1685 * The block size for the single block cipher referenced with the cipher handle 1686 * tfm is returned. The caller may use that information to allocate appropriate 1687 * memory for the data returned by the encryption or decryption operation 1688 * 1689 * Return: block size of cipher 1690 */ 1691static inline unsigned int crypto_cipher_blocksize(struct crypto_cipher *tfm) 1692{ 1693 return crypto_tfm_alg_blocksize(crypto_cipher_tfm(tfm)); 1694} 1695 1696static inline unsigned int crypto_cipher_alignmask(struct crypto_cipher *tfm) 1697{ 1698 return crypto_tfm_alg_alignmask(crypto_cipher_tfm(tfm)); 1699} 1700 1701static inline u32 crypto_cipher_get_flags(struct crypto_cipher *tfm) 1702{ 1703 return crypto_tfm_get_flags(crypto_cipher_tfm(tfm)); 1704} 1705 1706static inline void crypto_cipher_set_flags(struct crypto_cipher *tfm, 1707 u32 flags) 1708{ 1709 crypto_tfm_set_flags(crypto_cipher_tfm(tfm), flags); 1710} 1711 1712static inline void crypto_cipher_clear_flags(struct crypto_cipher *tfm, 1713 u32 flags) 1714{ 1715 crypto_tfm_clear_flags(crypto_cipher_tfm(tfm), flags); 1716} 1717 1718/** 1719 * crypto_cipher_setkey() - set key for cipher 1720 * @tfm: cipher handle 1721 * @key: buffer holding the key 1722 * @keylen: length of the key in bytes 1723 * 1724 * The caller provided key is set for the single block cipher referenced by the 1725 * cipher handle. 1726 * 1727 * Note, the key length determines the cipher type. Many block ciphers implement 1728 * different cipher modes depending on the key size, such as AES-128 vs AES-192 1729 * vs. AES-256. When providing a 16 byte key for an AES cipher handle, AES-128 1730 * is performed. 1731 * 1732 * Return: 0 if the setting of the key was successful; < 0 if an error occurred 1733 */ 1734static inline int crypto_cipher_setkey(struct crypto_cipher *tfm, 1735 const u8 *key, unsigned int keylen) 1736{ 1737 return crypto_cipher_crt(tfm)->cit_setkey(crypto_cipher_tfm(tfm), 1738 key, keylen); 1739} 1740 1741/** 1742 * crypto_cipher_encrypt_one() - encrypt one block of plaintext 1743 * @tfm: cipher handle 1744 * @dst: points to the buffer that will be filled with the ciphertext 1745 * @src: buffer holding the plaintext to be encrypted 1746 * 1747 * Invoke the encryption operation of one block. The caller must ensure that 1748 * the plaintext and ciphertext buffers are at least one block in size. 1749 */ 1750static inline void crypto_cipher_encrypt_one(struct crypto_cipher *tfm, 1751 u8 *dst, const u8 *src) 1752{ 1753 crypto_cipher_crt(tfm)->cit_encrypt_one(crypto_cipher_tfm(tfm), 1754 dst, src); 1755} 1756 1757/** 1758 * crypto_cipher_decrypt_one() - decrypt one block of ciphertext 1759 * @tfm: cipher handle 1760 * @dst: points to the buffer that will be filled with the plaintext 1761 * @src: buffer holding the ciphertext to be decrypted 1762 * 1763 * Invoke the decryption operation of one block. The caller must ensure that 1764 * the plaintext and ciphertext buffers are at least one block in size. 1765 */ 1766static inline void crypto_cipher_decrypt_one(struct crypto_cipher *tfm, 1767 u8 *dst, const u8 *src) 1768{ 1769 crypto_cipher_crt(tfm)->cit_decrypt_one(crypto_cipher_tfm(tfm), 1770 dst, src); 1771} 1772 1773static inline struct crypto_comp *__crypto_comp_cast(struct crypto_tfm *tfm) 1774{ 1775 return (struct crypto_comp *)tfm; 1776} 1777 1778static inline struct crypto_comp *crypto_comp_cast(struct crypto_tfm *tfm) 1779{ 1780 BUG_ON((crypto_tfm_alg_type(tfm) ^ CRYPTO_ALG_TYPE_COMPRESS) & 1781 CRYPTO_ALG_TYPE_MASK); 1782 return __crypto_comp_cast(tfm); 1783} 1784 1785static inline struct crypto_comp *crypto_alloc_comp(const char *alg_name, 1786 u32 type, u32 mask) 1787{ 1788 type &= ~CRYPTO_ALG_TYPE_MASK; 1789 type |= CRYPTO_ALG_TYPE_COMPRESS; 1790 mask |= CRYPTO_ALG_TYPE_MASK; 1791 1792 return __crypto_comp_cast(crypto_alloc_base(alg_name, type, mask)); 1793} 1794 1795static inline struct crypto_tfm *crypto_comp_tfm(struct crypto_comp *tfm) 1796{ 1797 return &tfm->base; 1798} 1799 1800static inline void crypto_free_comp(struct crypto_comp *tfm) 1801{ 1802 crypto_free_tfm(crypto_comp_tfm(tfm)); 1803} 1804 1805static inline int crypto_has_comp(const char *alg_name, u32 type, u32 mask) 1806{ 1807 type &= ~CRYPTO_ALG_TYPE_MASK; 1808 type |= CRYPTO_ALG_TYPE_COMPRESS; 1809 mask |= CRYPTO_ALG_TYPE_MASK; 1810 1811 return crypto_has_alg(alg_name, type, mask); 1812} 1813 1814static inline const char *crypto_comp_name(struct crypto_comp *tfm) 1815{ 1816 return crypto_tfm_alg_name(crypto_comp_tfm(tfm)); 1817} 1818 1819static inline struct compress_tfm *crypto_comp_crt(struct crypto_comp *tfm) 1820{ 1821 return &crypto_comp_tfm(tfm)->crt_compress; 1822} 1823 1824static inline int crypto_comp_compress(struct crypto_comp *tfm, 1825 const u8 *src, unsigned int slen, 1826 u8 *dst, unsigned int *dlen) 1827{ 1828 return crypto_comp_crt(tfm)->cot_compress(crypto_comp_tfm(tfm), 1829 src, slen, dst, dlen); 1830} 1831 1832static inline int crypto_comp_decompress(struct crypto_comp *tfm, 1833 const u8 *src, unsigned int slen, 1834 u8 *dst, unsigned int *dlen) 1835{ 1836 return crypto_comp_crt(tfm)->cot_decompress(crypto_comp_tfm(tfm), 1837 src, slen, dst, dlen); 1838} 1839 1840#endif /* _LINUX_CRYPTO_H */ 1841 1842