1 /* SPDX-License-Identifier: GPL-2.0-or-later */
3 * Scatterlist Cryptographic API.
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>
9 * Portions derived from Cryptoapi, by Alexander Kjeldaas <astor@fast.no>
10 * and Nettle, by Niels Möller.
12 #ifndef _LINUX_CRYPTO_H
13 #define _LINUX_CRYPTO_H
15 #include <linux/atomic.h>
16 #include <linux/kernel.h>
17 #include <linux/list.h>
18 #include <linux/bug.h>
19 #include <linux/refcount.h>
20 #include <linux/slab.h>
21 #include <linux/completion.h>
24 * Autoloaded crypto modules should only use a prefixed name to avoid allowing
25 * arbitrary modules to be loaded. Loading from userspace may still need the
26 * unprefixed names, so retains those aliases as well.
27 * This uses __MODULE_INFO directly instead of MODULE_ALIAS because pre-4.3
28 * gcc (e.g. avr32 toolchain) uses __LINE__ for uniqueness, and this macro
29 * expands twice on the same line. Instead, use a separate base name for the
32 #define MODULE_ALIAS_CRYPTO(name) \
33 __MODULE_INFO(alias, alias_userspace, name); \
34 __MODULE_INFO(alias, alias_crypto, "crypto-" name)
37 * Algorithm masks and types.
39 #define CRYPTO_ALG_TYPE_MASK 0x0000000f
40 #define CRYPTO_ALG_TYPE_CIPHER 0x00000001
41 #define CRYPTO_ALG_TYPE_COMPRESS 0x00000002
42 #define CRYPTO_ALG_TYPE_AEAD 0x00000003
43 #define CRYPTO_ALG_TYPE_SKCIPHER 0x00000005
44 #define CRYPTO_ALG_TYPE_KPP 0x00000008
45 #define CRYPTO_ALG_TYPE_ACOMPRESS 0x0000000a
46 #define CRYPTO_ALG_TYPE_SCOMPRESS 0x0000000b
47 #define CRYPTO_ALG_TYPE_RNG 0x0000000c
48 #define CRYPTO_ALG_TYPE_AKCIPHER 0x0000000d
49 #define CRYPTO_ALG_TYPE_HASH 0x0000000e
50 #define CRYPTO_ALG_TYPE_SHASH 0x0000000e
51 #define CRYPTO_ALG_TYPE_AHASH 0x0000000f
53 #define CRYPTO_ALG_TYPE_HASH_MASK 0x0000000e
54 #define CRYPTO_ALG_TYPE_AHASH_MASK 0x0000000e
55 #define CRYPTO_ALG_TYPE_ACOMPRESS_MASK 0x0000000e
57 #define CRYPTO_ALG_LARVAL 0x00000010
58 #define CRYPTO_ALG_DEAD 0x00000020
59 #define CRYPTO_ALG_DYING 0x00000040
60 #define CRYPTO_ALG_ASYNC 0x00000080
63 * Set if the algorithm (or an algorithm which it uses) requires another
64 * algorithm of the same type to handle corner cases.
66 #define CRYPTO_ALG_NEED_FALLBACK 0x00000100
69 * Set if the algorithm has passed automated run-time testing. Note that
70 * if there is no run-time testing for a given algorithm it is considered
74 #define CRYPTO_ALG_TESTED 0x00000400
77 * Set if the algorithm is an instance that is built from templates.
79 #define CRYPTO_ALG_INSTANCE 0x00000800
81 /* Set this bit if the algorithm provided is hardware accelerated but
82 * not available to userspace via instruction set or so.
84 #define CRYPTO_ALG_KERN_DRIVER_ONLY 0x00001000
87 * Mark a cipher as a service implementation only usable by another
88 * cipher and never by a normal user of the kernel crypto API
90 #define CRYPTO_ALG_INTERNAL 0x00002000
93 * Set if the algorithm has a ->setkey() method but can be used without
94 * calling it first, i.e. there is a default key.
96 #define CRYPTO_ALG_OPTIONAL_KEY 0x00004000
99 * Don't trigger module loading
101 #define CRYPTO_NOLOAD 0x00008000
104 * The algorithm may allocate memory during request processing, i.e. during
105 * encryption, decryption, or hashing. Users can request an algorithm with this
106 * flag unset if they can't handle memory allocation failures.
108 * This flag is currently only implemented for algorithms of type "skcipher",
109 * "aead", "ahash", "shash", and "cipher". Algorithms of other types might not
110 * have this flag set even if they allocate memory.
112 * In some edge cases, algorithms can allocate memory regardless of this flag.
113 * To avoid these cases, users must obey the following usage constraints:
115 * - The IV buffer and all scatterlist elements must be aligned to the
116 * algorithm's alignmask.
117 * - If the data were to be divided into chunks of size
118 * crypto_skcipher_walksize() (with any remainder going at the end), no
119 * chunk can cross a page boundary or a scatterlist element boundary.
121 * - The IV buffer and all scatterlist elements must be aligned to the
122 * algorithm's alignmask.
123 * - The first scatterlist element must contain all the associated data,
124 * and its pages must be !PageHighMem.
125 * - If the plaintext/ciphertext were to be divided into chunks of size
126 * crypto_aead_walksize() (with the remainder going at the end), no chunk
127 * can cross a page boundary or a scatterlist element boundary.
129 * - The result buffer must be aligned to the algorithm's alignmask.
130 * - crypto_ahash_finup() must not be used unless the algorithm implements
131 * ->finup() natively.
133 #define CRYPTO_ALG_ALLOCATES_MEMORY 0x00010000
136 * Transform masks and values (for crt_flags).
138 #define CRYPTO_TFM_NEED_KEY 0x00000001
140 #define CRYPTO_TFM_REQ_MASK 0x000fff00
141 #define CRYPTO_TFM_REQ_FORBID_WEAK_KEYS 0x00000100
142 #define CRYPTO_TFM_REQ_MAY_SLEEP 0x00000200
143 #define CRYPTO_TFM_REQ_MAY_BACKLOG 0x00000400
146 * Miscellaneous stuff.
148 #define CRYPTO_MAX_ALG_NAME 128
151 * The macro CRYPTO_MINALIGN_ATTR (along with the void * type in the actual
152 * declaration) is used to ensure that the crypto_tfm context structure is
153 * aligned correctly for the given architecture so that there are no alignment
154 * faults for C data types. On architectures that support non-cache coherent
155 * DMA, such as ARM or arm64, it also takes into account the minimal alignment
156 * that is required to ensure that the context struct member does not share any
157 * cachelines with the rest of the struct. This is needed to ensure that cache
158 * maintenance for non-coherent DMA (cache invalidation in particular) does not
159 * affect data that may be accessed by the CPU concurrently.
161 #define CRYPTO_MINALIGN ARCH_KMALLOC_MINALIGN
163 #define CRYPTO_MINALIGN_ATTR __attribute__ ((__aligned__(CRYPTO_MINALIGN)))
166 struct crypto_async_request
;
170 typedef void (*crypto_completion_t
)(struct crypto_async_request
*req
, int err
);
173 * DOC: Block Cipher Context Data Structures
175 * These data structures define the operating context for each block cipher
179 struct crypto_async_request
{
180 struct list_head list
;
181 crypto_completion_t complete
;
183 struct crypto_tfm
*tfm
;
189 * DOC: Block Cipher Algorithm Definitions
191 * These data structures define modular crypto algorithm implementations,
192 * managed via crypto_register_alg() and crypto_unregister_alg().
196 * struct cipher_alg - single-block symmetric ciphers definition
197 * @cia_min_keysize: Minimum key size supported by the transformation. This is
198 * the smallest key length supported by this transformation
199 * algorithm. This must be set to one of the pre-defined
200 * values as this is not hardware specific. Possible values
201 * for this field can be found via git grep "_MIN_KEY_SIZE"
203 * @cia_max_keysize: Maximum key size supported by the transformation. This is
204 * the largest key length supported by this transformation
205 * algorithm. This must be set to one of the pre-defined values
206 * as this is not hardware specific. Possible values for this
207 * field can be found via git grep "_MAX_KEY_SIZE"
209 * @cia_setkey: Set key for the transformation. This function is used to either
210 * program a supplied key into the hardware or store the key in the
211 * transformation context for programming it later. Note that this
212 * function does modify the transformation context. This function
213 * can be called multiple times during the existence of the
214 * transformation object, so one must make sure the key is properly
215 * reprogrammed into the hardware. This function is also
216 * responsible for checking the key length for validity.
217 * @cia_encrypt: Encrypt a single block. This function is used to encrypt a
218 * single block of data, which must be @cra_blocksize big. This
219 * always operates on a full @cra_blocksize and it is not possible
220 * to encrypt a block of smaller size. The supplied buffers must
221 * therefore also be at least of @cra_blocksize size. Both the
222 * input and output buffers are always aligned to @cra_alignmask.
223 * In case either of the input or output buffer supplied by user
224 * of the crypto API is not aligned to @cra_alignmask, the crypto
225 * API will re-align the buffers. The re-alignment means that a
226 * new buffer will be allocated, the data will be copied into the
227 * new buffer, then the processing will happen on the new buffer,
228 * then the data will be copied back into the original buffer and
229 * finally the new buffer will be freed. In case a software
230 * fallback was put in place in the @cra_init call, this function
231 * might need to use the fallback if the algorithm doesn't support
232 * all of the key sizes. In case the key was stored in
233 * transformation context, the key might need to be re-programmed
234 * into the hardware in this function. This function shall not
235 * modify the transformation context, as this function may be
236 * called in parallel with the same transformation object.
237 * @cia_decrypt: Decrypt a single block. This is a reverse counterpart to
238 * @cia_encrypt, and the conditions are exactly the same.
240 * All fields are mandatory and must be filled.
243 unsigned int cia_min_keysize
;
244 unsigned int cia_max_keysize
;
245 int (*cia_setkey
)(struct crypto_tfm
*tfm
, const u8
*key
,
246 unsigned int keylen
);
247 void (*cia_encrypt
)(struct crypto_tfm
*tfm
, u8
*dst
, const u8
*src
);
248 void (*cia_decrypt
)(struct crypto_tfm
*tfm
, u8
*dst
, const u8
*src
);
252 * struct compress_alg - compression/decompression algorithm
253 * @coa_compress: Compress a buffer of specified length, storing the resulting
254 * data in the specified buffer. Return the length of the
255 * compressed data in dlen.
256 * @coa_decompress: Decompress the source buffer, storing the uncompressed
257 * data in the specified buffer. The length of the data is
260 * All fields are mandatory.
262 struct compress_alg
{
263 int (*coa_compress
)(struct crypto_tfm
*tfm
, const u8
*src
,
264 unsigned int slen
, u8
*dst
, unsigned int *dlen
);
265 int (*coa_decompress
)(struct crypto_tfm
*tfm
, const u8
*src
,
266 unsigned int slen
, u8
*dst
, unsigned int *dlen
);
269 #ifdef CONFIG_CRYPTO_STATS
271 * struct crypto_istat_aead - statistics for AEAD algorithm
272 * @encrypt_cnt: number of encrypt requests
273 * @encrypt_tlen: total data size handled by encrypt requests
274 * @decrypt_cnt: number of decrypt requests
275 * @decrypt_tlen: total data size handled by decrypt requests
276 * @err_cnt: number of error for AEAD requests
278 struct crypto_istat_aead
{
279 atomic64_t encrypt_cnt
;
280 atomic64_t encrypt_tlen
;
281 atomic64_t decrypt_cnt
;
282 atomic64_t decrypt_tlen
;
287 * struct crypto_istat_akcipher - statistics for akcipher algorithm
288 * @encrypt_cnt: number of encrypt requests
289 * @encrypt_tlen: total data size handled by encrypt requests
290 * @decrypt_cnt: number of decrypt requests
291 * @decrypt_tlen: total data size handled by decrypt requests
292 * @verify_cnt: number of verify operation
293 * @sign_cnt: number of sign requests
294 * @err_cnt: number of error for akcipher requests
296 struct crypto_istat_akcipher
{
297 atomic64_t encrypt_cnt
;
298 atomic64_t encrypt_tlen
;
299 atomic64_t decrypt_cnt
;
300 atomic64_t decrypt_tlen
;
301 atomic64_t verify_cnt
;
307 * struct crypto_istat_cipher - statistics for cipher algorithm
308 * @encrypt_cnt: number of encrypt requests
309 * @encrypt_tlen: total data size handled by encrypt requests
310 * @decrypt_cnt: number of decrypt requests
311 * @decrypt_tlen: total data size handled by decrypt requests
312 * @err_cnt: number of error for cipher requests
314 struct crypto_istat_cipher
{
315 atomic64_t encrypt_cnt
;
316 atomic64_t encrypt_tlen
;
317 atomic64_t decrypt_cnt
;
318 atomic64_t decrypt_tlen
;
323 * struct crypto_istat_compress - statistics for compress algorithm
324 * @compress_cnt: number of compress requests
325 * @compress_tlen: total data size handled by compress requests
326 * @decompress_cnt: number of decompress requests
327 * @decompress_tlen: total data size handled by decompress requests
328 * @err_cnt: number of error for compress requests
330 struct crypto_istat_compress
{
331 atomic64_t compress_cnt
;
332 atomic64_t compress_tlen
;
333 atomic64_t decompress_cnt
;
334 atomic64_t decompress_tlen
;
339 * struct crypto_istat_hash - statistics for has algorithm
340 * @hash_cnt: number of hash requests
341 * @hash_tlen: total data size hashed
342 * @err_cnt: number of error for hash requests
344 struct crypto_istat_hash
{
346 atomic64_t hash_tlen
;
351 * struct crypto_istat_kpp - statistics for KPP algorithm
352 * @setsecret_cnt: number of setsecrey operation
353 * @generate_public_key_cnt: number of generate_public_key operation
354 * @compute_shared_secret_cnt: number of compute_shared_secret operation
355 * @err_cnt: number of error for KPP requests
357 struct crypto_istat_kpp
{
358 atomic64_t setsecret_cnt
;
359 atomic64_t generate_public_key_cnt
;
360 atomic64_t compute_shared_secret_cnt
;
365 * struct crypto_istat_rng: statistics for RNG algorithm
366 * @generate_cnt: number of RNG generate requests
367 * @generate_tlen: total data size of generated data by the RNG
368 * @seed_cnt: number of times the RNG was seeded
369 * @err_cnt: number of error for RNG requests
371 struct crypto_istat_rng
{
372 atomic64_t generate_cnt
;
373 atomic64_t generate_tlen
;
377 #endif /* CONFIG_CRYPTO_STATS */
379 #define cra_cipher cra_u.cipher
380 #define cra_compress cra_u.compress
383 * struct crypto_alg - definition of a cryptograpic cipher algorithm
384 * @cra_flags: Flags describing this transformation. See include/linux/crypto.h
385 * CRYPTO_ALG_* flags for the flags which go in here. Those are
386 * used for fine-tuning the description of the transformation
388 * @cra_blocksize: Minimum block size of this transformation. The size in bytes
389 * of the smallest possible unit which can be transformed with
390 * this algorithm. The users must respect this value.
391 * In case of HASH transformation, it is possible for a smaller
392 * block than @cra_blocksize to be passed to the crypto API for
393 * transformation, in case of any other transformation type, an
394 * error will be returned upon any attempt to transform smaller
395 * than @cra_blocksize chunks.
396 * @cra_ctxsize: Size of the operational context of the transformation. This
397 * value informs the kernel crypto API about the memory size
398 * needed to be allocated for the transformation context.
399 * @cra_alignmask: Alignment mask for the input and output data buffer. The data
400 * buffer containing the input data for the algorithm must be
401 * aligned to this alignment mask. The data buffer for the
402 * output data must be aligned to this alignment mask. Note that
403 * the Crypto API will do the re-alignment in software, but
404 * only under special conditions and there is a performance hit.
405 * The re-alignment happens at these occasions for different
406 * @cra_u types: cipher -- For both input data and output data
407 * buffer; ahash -- For output hash destination buf; shash --
408 * For output hash destination buf.
409 * This is needed on hardware which is flawed by design and
410 * cannot pick data from arbitrary addresses.
411 * @cra_priority: Priority of this transformation implementation. In case
412 * multiple transformations with same @cra_name are available to
413 * the Crypto API, the kernel will use the one with highest
415 * @cra_name: Generic name (usable by multiple implementations) of the
416 * transformation algorithm. This is the name of the transformation
417 * itself. This field is used by the kernel when looking up the
418 * providers of particular transformation.
419 * @cra_driver_name: Unique name of the transformation provider. This is the
420 * name of the provider of the transformation. This can be any
421 * arbitrary value, but in the usual case, this contains the
422 * name of the chip or provider and the name of the
423 * transformation algorithm.
424 * @cra_type: Type of the cryptographic transformation. This is a pointer to
425 * struct crypto_type, which implements callbacks common for all
426 * transformation types. There are multiple options, such as
427 * &crypto_skcipher_type, &crypto_ahash_type, &crypto_rng_type.
428 * This field might be empty. In that case, there are no common
429 * callbacks. This is the case for: cipher, compress, shash.
430 * @cra_u: Callbacks implementing the transformation. This is a union of
431 * multiple structures. Depending on the type of transformation selected
432 * by @cra_type and @cra_flags above, the associated structure must be
433 * filled with callbacks. This field might be empty. This is the case
435 * @cra_init: Initialize the cryptographic transformation object. This function
436 * is used to initialize the cryptographic transformation object.
437 * This function is called only once at the instantiation time, right
438 * after the transformation context was allocated. In case the
439 * cryptographic hardware has some special requirements which need to
440 * be handled by software, this function shall check for the precise
441 * requirement of the transformation and put any software fallbacks
443 * @cra_exit: Deinitialize the cryptographic transformation object. This is a
444 * counterpart to @cra_init, used to remove various changes set in
446 * @cra_u.cipher: Union member which contains a single-block symmetric cipher
447 * definition. See @struct @cipher_alg.
448 * @cra_u.compress: Union member which contains a (de)compression algorithm.
449 * See @struct @compress_alg.
450 * @cra_module: Owner of this transformation implementation. Set to THIS_MODULE
451 * @cra_list: internally used
452 * @cra_users: internally used
453 * @cra_refcnt: internally used
454 * @cra_destroy: internally used
456 * @stats: union of all possible crypto_istat_xxx structures
457 * @stats.aead: statistics for AEAD algorithm
458 * @stats.akcipher: statistics for akcipher algorithm
459 * @stats.cipher: statistics for cipher algorithm
460 * @stats.compress: statistics for compress algorithm
461 * @stats.hash: statistics for hash algorithm
462 * @stats.rng: statistics for rng algorithm
463 * @stats.kpp: statistics for KPP algorithm
465 * The struct crypto_alg describes a generic Crypto API algorithm and is common
466 * for all of the transformations. Any variable not documented here shall not
467 * be used by a cipher implementation as it is internal to the Crypto API.
470 struct list_head cra_list
;
471 struct list_head cra_users
;
474 unsigned int cra_blocksize
;
475 unsigned int cra_ctxsize
;
476 unsigned int cra_alignmask
;
479 refcount_t cra_refcnt
;
481 char cra_name
[CRYPTO_MAX_ALG_NAME
];
482 char cra_driver_name
[CRYPTO_MAX_ALG_NAME
];
484 const struct crypto_type
*cra_type
;
487 struct cipher_alg cipher
;
488 struct compress_alg compress
;
491 int (*cra_init
)(struct crypto_tfm
*tfm
);
492 void (*cra_exit
)(struct crypto_tfm
*tfm
);
493 void (*cra_destroy
)(struct crypto_alg
*alg
);
495 struct module
*cra_module
;
497 #ifdef CONFIG_CRYPTO_STATS
499 struct crypto_istat_aead aead
;
500 struct crypto_istat_akcipher akcipher
;
501 struct crypto_istat_cipher cipher
;
502 struct crypto_istat_compress compress
;
503 struct crypto_istat_hash hash
;
504 struct crypto_istat_rng rng
;
505 struct crypto_istat_kpp kpp
;
507 #endif /* CONFIG_CRYPTO_STATS */
509 } CRYPTO_MINALIGN_ATTR
;
511 #ifdef CONFIG_CRYPTO_STATS
512 void crypto_stats_init(struct crypto_alg
*alg
);
513 void crypto_stats_get(struct crypto_alg
*alg
);
514 void crypto_stats_aead_encrypt(unsigned int cryptlen
, struct crypto_alg
*alg
, int ret
);
515 void crypto_stats_aead_decrypt(unsigned int cryptlen
, struct crypto_alg
*alg
, int ret
);
516 void crypto_stats_ahash_update(unsigned int nbytes
, int ret
, struct crypto_alg
*alg
);
517 void crypto_stats_ahash_final(unsigned int nbytes
, int ret
, struct crypto_alg
*alg
);
518 void crypto_stats_akcipher_encrypt(unsigned int src_len
, int ret
, struct crypto_alg
*alg
);
519 void crypto_stats_akcipher_decrypt(unsigned int src_len
, int ret
, struct crypto_alg
*alg
);
520 void crypto_stats_akcipher_sign(int ret
, struct crypto_alg
*alg
);
521 void crypto_stats_akcipher_verify(int ret
, struct crypto_alg
*alg
);
522 void crypto_stats_compress(unsigned int slen
, int ret
, struct crypto_alg
*alg
);
523 void crypto_stats_decompress(unsigned int slen
, int ret
, struct crypto_alg
*alg
);
524 void crypto_stats_kpp_set_secret(struct crypto_alg
*alg
, int ret
);
525 void crypto_stats_kpp_generate_public_key(struct crypto_alg
*alg
, int ret
);
526 void crypto_stats_kpp_compute_shared_secret(struct crypto_alg
*alg
, int ret
);
527 void crypto_stats_rng_seed(struct crypto_alg
*alg
, int ret
);
528 void crypto_stats_rng_generate(struct crypto_alg
*alg
, unsigned int dlen
, int ret
);
529 void crypto_stats_skcipher_encrypt(unsigned int cryptlen
, int ret
, struct crypto_alg
*alg
);
530 void crypto_stats_skcipher_decrypt(unsigned int cryptlen
, int ret
, struct crypto_alg
*alg
);
532 static inline void crypto_stats_init(struct crypto_alg
*alg
)
534 static inline void crypto_stats_get(struct crypto_alg
*alg
)
536 static inline void crypto_stats_aead_encrypt(unsigned int cryptlen
, struct crypto_alg
*alg
, int ret
)
538 static inline void crypto_stats_aead_decrypt(unsigned int cryptlen
, struct crypto_alg
*alg
, int ret
)
540 static inline void crypto_stats_ahash_update(unsigned int nbytes
, int ret
, struct crypto_alg
*alg
)
542 static inline void crypto_stats_ahash_final(unsigned int nbytes
, int ret
, struct crypto_alg
*alg
)
544 static inline void crypto_stats_akcipher_encrypt(unsigned int src_len
, int ret
, struct crypto_alg
*alg
)
546 static inline void crypto_stats_akcipher_decrypt(unsigned int src_len
, int ret
, struct crypto_alg
*alg
)
548 static inline void crypto_stats_akcipher_sign(int ret
, struct crypto_alg
*alg
)
550 static inline void crypto_stats_akcipher_verify(int ret
, struct crypto_alg
*alg
)
552 static inline void crypto_stats_compress(unsigned int slen
, int ret
, struct crypto_alg
*alg
)
554 static inline void crypto_stats_decompress(unsigned int slen
, int ret
, struct crypto_alg
*alg
)
556 static inline void crypto_stats_kpp_set_secret(struct crypto_alg
*alg
, int ret
)
558 static inline void crypto_stats_kpp_generate_public_key(struct crypto_alg
*alg
, int ret
)
560 static inline void crypto_stats_kpp_compute_shared_secret(struct crypto_alg
*alg
, int ret
)
562 static inline void crypto_stats_rng_seed(struct crypto_alg
*alg
, int ret
)
564 static inline void crypto_stats_rng_generate(struct crypto_alg
*alg
, unsigned int dlen
, int ret
)
566 static inline void crypto_stats_skcipher_encrypt(unsigned int cryptlen
, int ret
, struct crypto_alg
*alg
)
568 static inline void crypto_stats_skcipher_decrypt(unsigned int cryptlen
, int ret
, struct crypto_alg
*alg
)
572 * A helper struct for waiting for completion of async crypto ops
575 struct completion completion
;
580 * Macro for declaring a crypto op async wait object on stack
582 #define DECLARE_CRYPTO_WAIT(_wait) \
583 struct crypto_wait _wait = { \
584 COMPLETION_INITIALIZER_ONSTACK((_wait).completion), 0 }
587 * Async ops completion helper functioons
589 void crypto_req_done(struct crypto_async_request
*req
, int err
);
591 static inline int crypto_wait_req(int err
, struct crypto_wait
*wait
)
596 wait_for_completion(&wait
->completion
);
597 reinit_completion(&wait
->completion
);
605 static inline void crypto_init_wait(struct crypto_wait
*wait
)
607 init_completion(&wait
->completion
);
611 * Algorithm registration interface.
613 int crypto_register_alg(struct crypto_alg
*alg
);
614 void crypto_unregister_alg(struct crypto_alg
*alg
);
615 int crypto_register_algs(struct crypto_alg
*algs
, int count
);
616 void crypto_unregister_algs(struct crypto_alg
*algs
, int count
);
619 * Algorithm query interface.
621 int crypto_has_alg(const char *name
, u32 type
, u32 mask
);
624 * Transforms: user-instantiated objects which encapsulate algorithms
625 * and core processing logic. Managed via crypto_alloc_*() and
626 * crypto_free_*(), as well as the various helpers below.
635 void (*exit
)(struct crypto_tfm
*tfm
);
637 struct crypto_alg
*__crt_alg
;
639 void *__crt_ctx
[] CRYPTO_MINALIGN_ATTR
;
643 struct crypto_tfm base
;
647 * Transform user interface.
650 struct crypto_tfm
*crypto_alloc_base(const char *alg_name
, u32 type
, u32 mask
);
651 void crypto_destroy_tfm(void *mem
, struct crypto_tfm
*tfm
);
653 static inline void crypto_free_tfm(struct crypto_tfm
*tfm
)
655 return crypto_destroy_tfm(tfm
, tfm
);
658 int alg_test(const char *driver
, const char *alg
, u32 type
, u32 mask
);
661 * Transform helpers which query the underlying algorithm.
663 static inline const char *crypto_tfm_alg_name(struct crypto_tfm
*tfm
)
665 return tfm
->__crt_alg
->cra_name
;
668 static inline const char *crypto_tfm_alg_driver_name(struct crypto_tfm
*tfm
)
670 return tfm
->__crt_alg
->cra_driver_name
;
673 static inline int crypto_tfm_alg_priority(struct crypto_tfm
*tfm
)
675 return tfm
->__crt_alg
->cra_priority
;
678 static inline u32
crypto_tfm_alg_type(struct crypto_tfm
*tfm
)
680 return tfm
->__crt_alg
->cra_flags
& CRYPTO_ALG_TYPE_MASK
;
683 static inline unsigned int crypto_tfm_alg_blocksize(struct crypto_tfm
*tfm
)
685 return tfm
->__crt_alg
->cra_blocksize
;
688 static inline unsigned int crypto_tfm_alg_alignmask(struct crypto_tfm
*tfm
)
690 return tfm
->__crt_alg
->cra_alignmask
;
693 static inline u32
crypto_tfm_get_flags(struct crypto_tfm
*tfm
)
695 return tfm
->crt_flags
;
698 static inline void crypto_tfm_set_flags(struct crypto_tfm
*tfm
, u32 flags
)
700 tfm
->crt_flags
|= flags
;
703 static inline void crypto_tfm_clear_flags(struct crypto_tfm
*tfm
, u32 flags
)
705 tfm
->crt_flags
&= ~flags
;
708 static inline void *crypto_tfm_ctx(struct crypto_tfm
*tfm
)
710 return tfm
->__crt_ctx
;
713 static inline unsigned int crypto_tfm_ctx_alignment(void)
715 struct crypto_tfm
*tfm
;
716 return __alignof__(tfm
->__crt_ctx
);
719 static inline struct crypto_comp
*__crypto_comp_cast(struct crypto_tfm
*tfm
)
721 return (struct crypto_comp
*)tfm
;
724 static inline struct crypto_comp
*crypto_alloc_comp(const char *alg_name
,
727 type
&= ~CRYPTO_ALG_TYPE_MASK
;
728 type
|= CRYPTO_ALG_TYPE_COMPRESS
;
729 mask
|= CRYPTO_ALG_TYPE_MASK
;
731 return __crypto_comp_cast(crypto_alloc_base(alg_name
, type
, mask
));
734 static inline struct crypto_tfm
*crypto_comp_tfm(struct crypto_comp
*tfm
)
739 static inline void crypto_free_comp(struct crypto_comp
*tfm
)
741 crypto_free_tfm(crypto_comp_tfm(tfm
));
744 static inline int crypto_has_comp(const char *alg_name
, u32 type
, u32 mask
)
746 type
&= ~CRYPTO_ALG_TYPE_MASK
;
747 type
|= CRYPTO_ALG_TYPE_COMPRESS
;
748 mask
|= CRYPTO_ALG_TYPE_MASK
;
750 return crypto_has_alg(alg_name
, type
, mask
);
753 static inline const char *crypto_comp_name(struct crypto_comp
*tfm
)
755 return crypto_tfm_alg_name(crypto_comp_tfm(tfm
));
758 int crypto_comp_compress(struct crypto_comp
*tfm
,
759 const u8
*src
, unsigned int slen
,
760 u8
*dst
, unsigned int *dlen
);
762 int crypto_comp_decompress(struct crypto_comp
*tfm
,
763 const u8
*src
, unsigned int slen
,
764 u8
*dst
, unsigned int *dlen
);
766 #endif /* _LINUX_CRYPTO_H */