Commit | Line | Data |
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2874c5fd | 1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
1da177e4 LT |
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) | |
5cb1454b | 7 | * Copyright (c) 2005 Herbert Xu <herbert@gondor.apana.org.au> |
1da177e4 LT |
8 | * |
9 | * Portions derived from Cryptoapi, by Alexander Kjeldaas <astor@fast.no> | |
18735dd8 | 10 | * and Nettle, by Niels Möller. |
1da177e4 LT |
11 | */ |
12 | #ifndef _LINUX_CRYPTO_H | |
13 | #define _LINUX_CRYPTO_H | |
14 | ||
01f727cd | 15 | #include <linux/completion.h> |
d037cb4a | 16 | #include <linux/refcount.h> |
79911102 | 17 | #include <linux/slab.h> |
01f727cd | 18 | #include <linux/types.h> |
1da177e4 LT |
19 | |
20 | /* | |
21 | * Algorithm masks and types. | |
22 | */ | |
2825982d | 23 | #define CRYPTO_ALG_TYPE_MASK 0x0000000f |
1da177e4 | 24 | #define CRYPTO_ALG_TYPE_CIPHER 0x00000001 |
004a403c LH |
25 | #define CRYPTO_ALG_TYPE_COMPRESS 0x00000002 |
26 | #define CRYPTO_ALG_TYPE_AEAD 0x00000003 | |
4e6c3df4 | 27 | #define CRYPTO_ALG_TYPE_SKCIPHER 0x00000005 |
4e5f2c40 | 28 | #define CRYPTO_ALG_TYPE_KPP 0x00000008 |
2ebda74f | 29 | #define CRYPTO_ALG_TYPE_ACOMPRESS 0x0000000a |
1ab53a77 | 30 | #define CRYPTO_ALG_TYPE_SCOMPRESS 0x0000000b |
17f0f4a4 | 31 | #define CRYPTO_ALG_TYPE_RNG 0x0000000c |
3c339ab8 | 32 | #define CRYPTO_ALG_TYPE_AKCIPHER 0x0000000d |
63044c4f GC |
33 | #define CRYPTO_ALG_TYPE_HASH 0x0000000e |
34 | #define CRYPTO_ALG_TYPE_SHASH 0x0000000e | |
35 | #define CRYPTO_ALG_TYPE_AHASH 0x0000000f | |
055bcee3 HX |
36 | |
37 | #define CRYPTO_ALG_TYPE_HASH_MASK 0x0000000e | |
63044c4f | 38 | #define CRYPTO_ALG_TYPE_AHASH_MASK 0x0000000e |
1ab53a77 | 39 | #define CRYPTO_ALG_TYPE_ACOMPRESS_MASK 0x0000000e |
1da177e4 | 40 | |
2825982d | 41 | #define CRYPTO_ALG_LARVAL 0x00000010 |
6bfd4809 HX |
42 | #define CRYPTO_ALG_DEAD 0x00000020 |
43 | #define CRYPTO_ALG_DYING 0x00000040 | |
f3f632d6 | 44 | #define CRYPTO_ALG_ASYNC 0x00000080 |
2825982d | 45 | |
6010439f | 46 | /* |
2eb27c11 EB |
47 | * Set if the algorithm (or an algorithm which it uses) requires another |
48 | * algorithm of the same type to handle corner cases. | |
6010439f HX |
49 | */ |
50 | #define CRYPTO_ALG_NEED_FALLBACK 0x00000100 | |
51 | ||
73d3864a HX |
52 | /* |
53 | * Set if the algorithm has passed automated run-time testing. Note that | |
54 | * if there is no run-time testing for a given algorithm it is considered | |
55 | * to have passed. | |
56 | */ | |
57 | ||
58 | #define CRYPTO_ALG_TESTED 0x00000400 | |
59 | ||
64a947b1 | 60 | /* |
864e0981 | 61 | * Set if the algorithm is an instance that is built from templates. |
64a947b1 SK |
62 | */ |
63 | #define CRYPTO_ALG_INSTANCE 0x00000800 | |
64 | ||
d912bb76 NM |
65 | /* Set this bit if the algorithm provided is hardware accelerated but |
66 | * not available to userspace via instruction set or so. | |
67 | */ | |
68 | #define CRYPTO_ALG_KERN_DRIVER_ONLY 0x00001000 | |
69 | ||
06ca7f68 SM |
70 | /* |
71 | * Mark a cipher as a service implementation only usable by another | |
72 | * cipher and never by a normal user of the kernel crypto API | |
73 | */ | |
74 | #define CRYPTO_ALG_INTERNAL 0x00002000 | |
75 | ||
a208fa8f EB |
76 | /* |
77 | * Set if the algorithm has a ->setkey() method but can be used without | |
78 | * calling it first, i.e. there is a default key. | |
79 | */ | |
80 | #define CRYPTO_ALG_OPTIONAL_KEY 0x00004000 | |
81 | ||
e2861fa7 MG |
82 | /* |
83 | * Don't trigger module loading | |
84 | */ | |
85 | #define CRYPTO_NOLOAD 0x00008000 | |
86 | ||
fbb6cda4 EB |
87 | /* |
88 | * The algorithm may allocate memory during request processing, i.e. during | |
89 | * encryption, decryption, or hashing. Users can request an algorithm with this | |
90 | * flag unset if they can't handle memory allocation failures. | |
91 | * | |
92 | * This flag is currently only implemented for algorithms of type "skcipher", | |
93 | * "aead", "ahash", "shash", and "cipher". Algorithms of other types might not | |
94 | * have this flag set even if they allocate memory. | |
95 | * | |
96 | * In some edge cases, algorithms can allocate memory regardless of this flag. | |
97 | * To avoid these cases, users must obey the following usage constraints: | |
98 | * skcipher: | |
99 | * - The IV buffer and all scatterlist elements must be aligned to the | |
100 | * algorithm's alignmask. | |
101 | * - If the data were to be divided into chunks of size | |
102 | * crypto_skcipher_walksize() (with any remainder going at the end), no | |
103 | * chunk can cross a page boundary or a scatterlist element boundary. | |
104 | * aead: | |
105 | * - The IV buffer and all scatterlist elements must be aligned to the | |
106 | * algorithm's alignmask. | |
107 | * - The first scatterlist element must contain all the associated data, | |
108 | * and its pages must be !PageHighMem. | |
109 | * - If the plaintext/ciphertext were to be divided into chunks of size | |
110 | * crypto_aead_walksize() (with the remainder going at the end), no chunk | |
111 | * can cross a page boundary or a scatterlist element boundary. | |
112 | * ahash: | |
113 | * - The result buffer must be aligned to the algorithm's alignmask. | |
114 | * - crypto_ahash_finup() must not be used unless the algorithm implements | |
115 | * ->finup() natively. | |
116 | */ | |
117 | #define CRYPTO_ALG_ALLOCATES_MEMORY 0x00010000 | |
118 | ||
d6097b8d NS |
119 | /* |
120 | * Mark an algorithm as a service implementation only usable by a | |
121 | * template and never by a normal user of the kernel crypto API. | |
122 | * This is intended to be used by algorithms that are themselves | |
123 | * not FIPS-approved but may instead be used to implement parts of | |
124 | * a FIPS-approved algorithm (e.g., dh vs. ffdhe2048(dh)). | |
125 | */ | |
126 | #define CRYPTO_ALG_FIPS_INTERNAL 0x00020000 | |
127 | ||
1da177e4 LT |
128 | /* |
129 | * Transform masks and values (for crt_flags). | |
130 | */ | |
9fa68f62 EB |
131 | #define CRYPTO_TFM_NEED_KEY 0x00000001 |
132 | ||
1da177e4 | 133 | #define CRYPTO_TFM_REQ_MASK 0x000fff00 |
231baecd | 134 | #define CRYPTO_TFM_REQ_FORBID_WEAK_KEYS 0x00000100 |
64baf3cf | 135 | #define CRYPTO_TFM_REQ_MAY_SLEEP 0x00000200 |
32e3983f | 136 | #define CRYPTO_TFM_REQ_MAY_BACKLOG 0x00000400 |
1da177e4 LT |
137 | |
138 | /* | |
139 | * Miscellaneous stuff. | |
140 | */ | |
f437a3f4 | 141 | #define CRYPTO_MAX_ALG_NAME 128 |
1da177e4 | 142 | |
79911102 HX |
143 | /* |
144 | * The macro CRYPTO_MINALIGN_ATTR (along with the void * type in the actual | |
145 | * declaration) is used to ensure that the crypto_tfm context structure is | |
146 | * aligned correctly for the given architecture so that there are no alignment | |
660d2062 AB |
147 | * faults for C data types. On architectures that support non-cache coherent |
148 | * DMA, such as ARM or arm64, it also takes into account the minimal alignment | |
149 | * that is required to ensure that the context struct member does not share any | |
150 | * cachelines with the rest of the struct. This is needed to ensure that cache | |
151 | * maintenance for non-coherent DMA (cache invalidation in particular) does not | |
152 | * affect data that may be accessed by the CPU concurrently. | |
79911102 | 153 | */ |
79911102 | 154 | #define CRYPTO_MINALIGN ARCH_KMALLOC_MINALIGN |
79911102 | 155 | |
79911102 | 156 | #define CRYPTO_MINALIGN_ATTR __attribute__ ((__aligned__(CRYPTO_MINALIGN))) |
79911102 | 157 | |
40725181 | 158 | struct crypto_tfm; |
e853c3cf | 159 | struct crypto_type; |
01f727cd | 160 | struct module; |
40725181 | 161 | |
255e48eb | 162 | typedef void (*crypto_completion_t)(void *req, int err); |
32e3983f | 163 | |
0d7f488f SM |
164 | /** |
165 | * DOC: Block Cipher Context Data Structures | |
166 | * | |
167 | * These data structures define the operating context for each block cipher | |
168 | * type. | |
169 | */ | |
170 | ||
32e3983f HX |
171 | struct crypto_async_request { |
172 | struct list_head list; | |
173 | crypto_completion_t complete; | |
174 | void *data; | |
175 | struct crypto_tfm *tfm; | |
176 | ||
177 | u32 flags; | |
178 | }; | |
179 | ||
0d7f488f SM |
180 | /** |
181 | * DOC: Block Cipher Algorithm Definitions | |
182 | * | |
183 | * These data structures define modular crypto algorithm implementations, | |
184 | * managed via crypto_register_alg() and crypto_unregister_alg(). | |
185 | */ | |
186 | ||
0d7f488f SM |
187 | /** |
188 | * struct cipher_alg - single-block symmetric ciphers definition | |
189 | * @cia_min_keysize: Minimum key size supported by the transformation. This is | |
190 | * the smallest key length supported by this transformation | |
191 | * algorithm. This must be set to one of the pre-defined | |
192 | * values as this is not hardware specific. Possible values | |
193 | * for this field can be found via git grep "_MIN_KEY_SIZE" | |
194 | * include/crypto/ | |
195 | * @cia_max_keysize: Maximum key size supported by the transformation. This is | |
196 | * the largest key length supported by this transformation | |
197 | * algorithm. This must be set to one of the pre-defined values | |
198 | * as this is not hardware specific. Possible values for this | |
199 | * field can be found via git grep "_MAX_KEY_SIZE" | |
200 | * include/crypto/ | |
201 | * @cia_setkey: Set key for the transformation. This function is used to either | |
202 | * program a supplied key into the hardware or store the key in the | |
203 | * transformation context for programming it later. Note that this | |
204 | * function does modify the transformation context. This function | |
205 | * can be called multiple times during the existence of the | |
206 | * transformation object, so one must make sure the key is properly | |
207 | * reprogrammed into the hardware. This function is also | |
208 | * responsible for checking the key length for validity. | |
209 | * @cia_encrypt: Encrypt a single block. This function is used to encrypt a | |
210 | * single block of data, which must be @cra_blocksize big. This | |
211 | * always operates on a full @cra_blocksize and it is not possible | |
212 | * to encrypt a block of smaller size. The supplied buffers must | |
213 | * therefore also be at least of @cra_blocksize size. Both the | |
214 | * input and output buffers are always aligned to @cra_alignmask. | |
215 | * In case either of the input or output buffer supplied by user | |
216 | * of the crypto API is not aligned to @cra_alignmask, the crypto | |
217 | * API will re-align the buffers. The re-alignment means that a | |
218 | * new buffer will be allocated, the data will be copied into the | |
219 | * new buffer, then the processing will happen on the new buffer, | |
220 | * then the data will be copied back into the original buffer and | |
221 | * finally the new buffer will be freed. In case a software | |
222 | * fallback was put in place in the @cra_init call, this function | |
223 | * might need to use the fallback if the algorithm doesn't support | |
224 | * all of the key sizes. In case the key was stored in | |
225 | * transformation context, the key might need to be re-programmed | |
226 | * into the hardware in this function. This function shall not | |
227 | * modify the transformation context, as this function may be | |
228 | * called in parallel with the same transformation object. | |
229 | * @cia_decrypt: Decrypt a single block. This is a reverse counterpart to | |
230 | * @cia_encrypt, and the conditions are exactly the same. | |
231 | * | |
232 | * All fields are mandatory and must be filled. | |
233 | */ | |
1da177e4 LT |
234 | struct cipher_alg { |
235 | unsigned int cia_min_keysize; | |
236 | unsigned int cia_max_keysize; | |
6c2bb98b | 237 | int (*cia_setkey)(struct crypto_tfm *tfm, const u8 *key, |
560c06ae | 238 | unsigned int keylen); |
6c2bb98b HX |
239 | void (*cia_encrypt)(struct crypto_tfm *tfm, u8 *dst, const u8 *src); |
240 | void (*cia_decrypt)(struct crypto_tfm *tfm, u8 *dst, const u8 *src); | |
1da177e4 LT |
241 | }; |
242 | ||
5a35316d HG |
243 | /** |
244 | * struct compress_alg - compression/decompression algorithm | |
245 | * @coa_compress: Compress a buffer of specified length, storing the resulting | |
246 | * data in the specified buffer. Return the length of the | |
247 | * compressed data in dlen. | |
248 | * @coa_decompress: Decompress the source buffer, storing the uncompressed | |
249 | * data in the specified buffer. The length of the data is | |
250 | * returned in dlen. | |
251 | * | |
252 | * All fields are mandatory. | |
253 | */ | |
1da177e4 | 254 | struct compress_alg { |
6c2bb98b HX |
255 | int (*coa_compress)(struct crypto_tfm *tfm, const u8 *src, |
256 | unsigned int slen, u8 *dst, unsigned int *dlen); | |
257 | int (*coa_decompress)(struct crypto_tfm *tfm, const u8 *src, | |
258 | unsigned int slen, u8 *dst, unsigned int *dlen); | |
1da177e4 LT |
259 | }; |
260 | ||
261 | #define cra_cipher cra_u.cipher | |
1da177e4 LT |
262 | #define cra_compress cra_u.compress |
263 | ||
0d7f488f SM |
264 | /** |
265 | * struct crypto_alg - definition of a cryptograpic cipher algorithm | |
266 | * @cra_flags: Flags describing this transformation. See include/linux/crypto.h | |
267 | * CRYPTO_ALG_* flags for the flags which go in here. Those are | |
268 | * used for fine-tuning the description of the transformation | |
269 | * algorithm. | |
270 | * @cra_blocksize: Minimum block size of this transformation. The size in bytes | |
271 | * of the smallest possible unit which can be transformed with | |
272 | * this algorithm. The users must respect this value. | |
273 | * In case of HASH transformation, it is possible for a smaller | |
274 | * block than @cra_blocksize to be passed to the crypto API for | |
275 | * transformation, in case of any other transformation type, an | |
276 | * error will be returned upon any attempt to transform smaller | |
277 | * than @cra_blocksize chunks. | |
278 | * @cra_ctxsize: Size of the operational context of the transformation. This | |
279 | * value informs the kernel crypto API about the memory size | |
280 | * needed to be allocated for the transformation context. | |
281 | * @cra_alignmask: Alignment mask for the input and output data buffer. The data | |
282 | * buffer containing the input data for the algorithm must be | |
283 | * aligned to this alignment mask. The data buffer for the | |
284 | * output data must be aligned to this alignment mask. Note that | |
285 | * the Crypto API will do the re-alignment in software, but | |
286 | * only under special conditions and there is a performance hit. | |
287 | * The re-alignment happens at these occasions for different | |
288 | * @cra_u types: cipher -- For both input data and output data | |
289 | * buffer; ahash -- For output hash destination buf; shash -- | |
290 | * For output hash destination buf. | |
291 | * This is needed on hardware which is flawed by design and | |
292 | * cannot pick data from arbitrary addresses. | |
293 | * @cra_priority: Priority of this transformation implementation. In case | |
294 | * multiple transformations with same @cra_name are available to | |
295 | * the Crypto API, the kernel will use the one with highest | |
296 | * @cra_priority. | |
297 | * @cra_name: Generic name (usable by multiple implementations) of the | |
298 | * transformation algorithm. This is the name of the transformation | |
299 | * itself. This field is used by the kernel when looking up the | |
300 | * providers of particular transformation. | |
301 | * @cra_driver_name: Unique name of the transformation provider. This is the | |
302 | * name of the provider of the transformation. This can be any | |
303 | * arbitrary value, but in the usual case, this contains the | |
304 | * name of the chip or provider and the name of the | |
305 | * transformation algorithm. | |
306 | * @cra_type: Type of the cryptographic transformation. This is a pointer to | |
307 | * struct crypto_type, which implements callbacks common for all | |
c65058b7 EB |
308 | * transformation types. There are multiple options, such as |
309 | * &crypto_skcipher_type, &crypto_ahash_type, &crypto_rng_type. | |
0d7f488f SM |
310 | * This field might be empty. In that case, there are no common |
311 | * callbacks. This is the case for: cipher, compress, shash. | |
312 | * @cra_u: Callbacks implementing the transformation. This is a union of | |
313 | * multiple structures. Depending on the type of transformation selected | |
314 | * by @cra_type and @cra_flags above, the associated structure must be | |
315 | * filled with callbacks. This field might be empty. This is the case | |
316 | * for ahash, shash. | |
317 | * @cra_init: Initialize the cryptographic transformation object. This function | |
318 | * is used to initialize the cryptographic transformation object. | |
319 | * This function is called only once at the instantiation time, right | |
320 | * after the transformation context was allocated. In case the | |
321 | * cryptographic hardware has some special requirements which need to | |
322 | * be handled by software, this function shall check for the precise | |
323 | * requirement of the transformation and put any software fallbacks | |
324 | * in place. | |
325 | * @cra_exit: Deinitialize the cryptographic transformation object. This is a | |
326 | * counterpart to @cra_init, used to remove various changes set in | |
327 | * @cra_init. | |
0063ec44 GH |
328 | * @cra_u.cipher: Union member which contains a single-block symmetric cipher |
329 | * definition. See @struct @cipher_alg. | |
330 | * @cra_u.compress: Union member which contains a (de)compression algorithm. | |
331 | * See @struct @compress_alg. | |
0d7f488f SM |
332 | * @cra_module: Owner of this transformation implementation. Set to THIS_MODULE |
333 | * @cra_list: internally used | |
334 | * @cra_users: internally used | |
335 | * @cra_refcnt: internally used | |
336 | * @cra_destroy: internally used | |
337 | * | |
338 | * The struct crypto_alg describes a generic Crypto API algorithm and is common | |
339 | * for all of the transformations. Any variable not documented here shall not | |
340 | * be used by a cipher implementation as it is internal to the Crypto API. | |
341 | */ | |
1da177e4 LT |
342 | struct crypto_alg { |
343 | struct list_head cra_list; | |
6bfd4809 HX |
344 | struct list_head cra_users; |
345 | ||
1da177e4 LT |
346 | u32 cra_flags; |
347 | unsigned int cra_blocksize; | |
348 | unsigned int cra_ctxsize; | |
95477377 | 349 | unsigned int cra_alignmask; |
5cb1454b HX |
350 | |
351 | int cra_priority; | |
ce8614a3 | 352 | refcount_t cra_refcnt; |
5cb1454b | 353 | |
d913ea0d HX |
354 | char cra_name[CRYPTO_MAX_ALG_NAME]; |
355 | char cra_driver_name[CRYPTO_MAX_ALG_NAME]; | |
1da177e4 | 356 | |
e853c3cf HX |
357 | const struct crypto_type *cra_type; |
358 | ||
1da177e4 LT |
359 | union { |
360 | struct cipher_alg cipher; | |
1da177e4 LT |
361 | struct compress_alg compress; |
362 | } cra_u; | |
c7fc0599 HX |
363 | |
364 | int (*cra_init)(struct crypto_tfm *tfm); | |
365 | void (*cra_exit)(struct crypto_tfm *tfm); | |
6521f302 | 366 | void (*cra_destroy)(struct crypto_alg *alg); |
1da177e4 LT |
367 | |
368 | struct module *cra_module; | |
edf18b91 | 369 | } CRYPTO_MINALIGN_ATTR; |
1da177e4 | 370 | |
ada69a16 GBY |
371 | /* |
372 | * A helper struct for waiting for completion of async crypto ops | |
373 | */ | |
374 | struct crypto_wait { | |
375 | struct completion completion; | |
376 | int err; | |
377 | }; | |
378 | ||
379 | /* | |
380 | * Macro for declaring a crypto op async wait object on stack | |
381 | */ | |
382 | #define DECLARE_CRYPTO_WAIT(_wait) \ | |
383 | struct crypto_wait _wait = { \ | |
384 | COMPLETION_INITIALIZER_ONSTACK((_wait).completion), 0 } | |
385 | ||
386 | /* | |
387 | * Async ops completion helper functioons | |
388 | */ | |
255e48eb | 389 | void crypto_req_done(void *req, int err); |
ada69a16 GBY |
390 | |
391 | static inline int crypto_wait_req(int err, struct crypto_wait *wait) | |
392 | { | |
393 | switch (err) { | |
394 | case -EINPROGRESS: | |
395 | case -EBUSY: | |
396 | wait_for_completion(&wait->completion); | |
397 | reinit_completion(&wait->completion); | |
398 | err = wait->err; | |
399 | break; | |
c782937e | 400 | } |
ada69a16 GBY |
401 | |
402 | return err; | |
403 | } | |
404 | ||
405 | static inline void crypto_init_wait(struct crypto_wait *wait) | |
406 | { | |
407 | init_completion(&wait->completion); | |
408 | } | |
409 | ||
1da177e4 LT |
410 | /* |
411 | * Algorithm query interface. | |
412 | */ | |
fce32d70 | 413 | int crypto_has_alg(const char *name, u32 type, u32 mask); |
1da177e4 LT |
414 | |
415 | /* | |
416 | * Transforms: user-instantiated objects which encapsulate algorithms | |
6d7d684d HX |
417 | * and core processing logic. Managed via crypto_alloc_*() and |
418 | * crypto_free_*(), as well as the various helpers below. | |
1da177e4 | 419 | */ |
1da177e4 | 420 | |
1da177e4 | 421 | struct crypto_tfm { |
ae131f49 | 422 | refcount_t refcnt; |
1da177e4 LT |
423 | |
424 | u32 crt_flags; | |
7bc13b5b BS |
425 | |
426 | int node; | |
1da177e4 | 427 | |
4a779486 | 428 | void (*exit)(struct crypto_tfm *tfm); |
1da177e4 LT |
429 | |
430 | struct crypto_alg *__crt_alg; | |
f10b7897 | 431 | |
79911102 | 432 | void *__crt_ctx[] CRYPTO_MINALIGN_ATTR; |
1da177e4 LT |
433 | }; |
434 | ||
78a1fe4f HX |
435 | struct crypto_comp { |
436 | struct crypto_tfm base; | |
437 | }; | |
438 | ||
1da177e4 LT |
439 | /* |
440 | * Transform user interface. | |
441 | */ | |
442 | ||
6d7d684d | 443 | struct crypto_tfm *crypto_alloc_base(const char *alg_name, u32 type, u32 mask); |
7b2cd92a HX |
444 | void crypto_destroy_tfm(void *mem, struct crypto_tfm *tfm); |
445 | ||
446 | static inline void crypto_free_tfm(struct crypto_tfm *tfm) | |
447 | { | |
448 | return crypto_destroy_tfm(tfm, tfm); | |
449 | } | |
1da177e4 LT |
450 | |
451 | /* | |
452 | * Transform helpers which query the underlying algorithm. | |
453 | */ | |
454 | static inline const char *crypto_tfm_alg_name(struct crypto_tfm *tfm) | |
455 | { | |
456 | return tfm->__crt_alg->cra_name; | |
457 | } | |
458 | ||
b14cdd67 ML |
459 | static inline const char *crypto_tfm_alg_driver_name(struct crypto_tfm *tfm) |
460 | { | |
461 | return tfm->__crt_alg->cra_driver_name; | |
462 | } | |
463 | ||
1da177e4 LT |
464 | static inline unsigned int crypto_tfm_alg_blocksize(struct crypto_tfm *tfm) |
465 | { | |
466 | return tfm->__crt_alg->cra_blocksize; | |
467 | } | |
468 | ||
fbdae9f3 HX |
469 | static inline unsigned int crypto_tfm_alg_alignmask(struct crypto_tfm *tfm) |
470 | { | |
471 | return tfm->__crt_alg->cra_alignmask; | |
472 | } | |
473 | ||
f28776a3 HX |
474 | static inline u32 crypto_tfm_get_flags(struct crypto_tfm *tfm) |
475 | { | |
476 | return tfm->crt_flags; | |
477 | } | |
478 | ||
479 | static inline void crypto_tfm_set_flags(struct crypto_tfm *tfm, u32 flags) | |
480 | { | |
481 | tfm->crt_flags |= flags; | |
482 | } | |
483 | ||
484 | static inline void crypto_tfm_clear_flags(struct crypto_tfm *tfm, u32 flags) | |
485 | { | |
486 | tfm->crt_flags &= ~flags; | |
487 | } | |
488 | ||
f10b7897 HX |
489 | static inline unsigned int crypto_tfm_ctx_alignment(void) |
490 | { | |
491 | struct crypto_tfm *tfm; | |
492 | return __alignof__(tfm->__crt_ctx); | |
40725181 HX |
493 | } |
494 | ||
fce32d70 HX |
495 | static inline struct crypto_comp *__crypto_comp_cast(struct crypto_tfm *tfm) |
496 | { | |
497 | return (struct crypto_comp *)tfm; | |
498 | } | |
499 | ||
fce32d70 HX |
500 | static inline struct crypto_comp *crypto_alloc_comp(const char *alg_name, |
501 | u32 type, u32 mask) | |
502 | { | |
503 | type &= ~CRYPTO_ALG_TYPE_MASK; | |
504 | type |= CRYPTO_ALG_TYPE_COMPRESS; | |
505 | mask |= CRYPTO_ALG_TYPE_MASK; | |
506 | ||
507 | return __crypto_comp_cast(crypto_alloc_base(alg_name, type, mask)); | |
508 | } | |
509 | ||
510 | static inline struct crypto_tfm *crypto_comp_tfm(struct crypto_comp *tfm) | |
511 | { | |
78a1fe4f | 512 | return &tfm->base; |
fce32d70 HX |
513 | } |
514 | ||
515 | static inline void crypto_free_comp(struct crypto_comp *tfm) | |
516 | { | |
517 | crypto_free_tfm(crypto_comp_tfm(tfm)); | |
518 | } | |
519 | ||
520 | static inline int crypto_has_comp(const char *alg_name, u32 type, u32 mask) | |
521 | { | |
522 | type &= ~CRYPTO_ALG_TYPE_MASK; | |
523 | type |= CRYPTO_ALG_TYPE_COMPRESS; | |
524 | mask |= CRYPTO_ALG_TYPE_MASK; | |
525 | ||
526 | return crypto_has_alg(alg_name, type, mask); | |
527 | } | |
528 | ||
e4d5b79c HX |
529 | static inline const char *crypto_comp_name(struct crypto_comp *tfm) |
530 | { | |
531 | return crypto_tfm_alg_name(crypto_comp_tfm(tfm)); | |
532 | } | |
533 | ||
c441a909 EB |
534 | int crypto_comp_compress(struct crypto_comp *tfm, |
535 | const u8 *src, unsigned int slen, | |
536 | u8 *dst, unsigned int *dlen); | |
1da177e4 | 537 | |
c441a909 EB |
538 | int crypto_comp_decompress(struct crypto_comp *tfm, |
539 | const u8 *src, unsigned int slen, | |
540 | u8 *dst, unsigned int *dlen); | |
1da177e4 | 541 | |
1da177e4 LT |
542 | #endif /* _LINUX_CRYPTO_H */ |
543 |