Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * Scatterlist Cryptographic API. | |
3 | * | |
4 | * Copyright (c) 2002 James Morris <jmorris@intercode.com.au> | |
5 | * Copyright (c) 2002 David S. Miller (davem@redhat.com) | |
5cb1454b | 6 | * Copyright (c) 2005 Herbert Xu <herbert@gondor.apana.org.au> |
1da177e4 LT |
7 | * |
8 | * Portions derived from Cryptoapi, by Alexander Kjeldaas <astor@fast.no> | |
18735dd8 | 9 | * and Nettle, by Niels Möller. |
1da177e4 LT |
10 | * |
11 | * This program is free software; you can redistribute it and/or modify it | |
12 | * under the terms of the GNU General Public License as published by the Free | |
13 | * Software Foundation; either version 2 of the License, or (at your option) | |
14 | * any later version. | |
15 | * | |
16 | */ | |
17 | #ifndef _LINUX_CRYPTO_H | |
18 | #define _LINUX_CRYPTO_H | |
19 | ||
60063497 | 20 | #include <linux/atomic.h> |
1da177e4 | 21 | #include <linux/kernel.h> |
1da177e4 | 22 | #include <linux/list.h> |
187f1882 | 23 | #include <linux/bug.h> |
79911102 | 24 | #include <linux/slab.h> |
1da177e4 | 25 | #include <linux/string.h> |
79911102 | 26 | #include <linux/uaccess.h> |
1da177e4 | 27 | |
5d26a105 KC |
28 | /* |
29 | * Autoloaded crypto modules should only use a prefixed name to avoid allowing | |
30 | * arbitrary modules to be loaded. Loading from userspace may still need the | |
31 | * unprefixed names, so retains those aliases as well. | |
32 | * This uses __MODULE_INFO directly instead of MODULE_ALIAS because pre-4.3 | |
33 | * gcc (e.g. avr32 toolchain) uses __LINE__ for uniqueness, and this macro | |
34 | * expands twice on the same line. Instead, use a separate base name for the | |
35 | * alias. | |
36 | */ | |
37 | #define MODULE_ALIAS_CRYPTO(name) \ | |
38 | __MODULE_INFO(alias, alias_userspace, name); \ | |
39 | __MODULE_INFO(alias, alias_crypto, "crypto-" name) | |
40 | ||
1da177e4 LT |
41 | /* |
42 | * Algorithm masks and types. | |
43 | */ | |
2825982d | 44 | #define CRYPTO_ALG_TYPE_MASK 0x0000000f |
1da177e4 | 45 | #define CRYPTO_ALG_TYPE_CIPHER 0x00000001 |
004a403c LH |
46 | #define CRYPTO_ALG_TYPE_COMPRESS 0x00000002 |
47 | #define CRYPTO_ALG_TYPE_AEAD 0x00000003 | |
055bcee3 | 48 | #define CRYPTO_ALG_TYPE_BLKCIPHER 0x00000004 |
332f8840 | 49 | #define CRYPTO_ALG_TYPE_ABLKCIPHER 0x00000005 |
61da88e2 | 50 | #define CRYPTO_ALG_TYPE_GIVCIPHER 0x00000006 |
004a403c | 51 | #define CRYPTO_ALG_TYPE_DIGEST 0x00000008 |
5f7082ed HX |
52 | #define CRYPTO_ALG_TYPE_HASH 0x00000008 |
53 | #define CRYPTO_ALG_TYPE_SHASH 0x00000009 | |
004a403c | 54 | #define CRYPTO_ALG_TYPE_AHASH 0x0000000a |
17f0f4a4 | 55 | #define CRYPTO_ALG_TYPE_RNG 0x0000000c |
a1d2f095 | 56 | #define CRYPTO_ALG_TYPE_PCOMPRESS 0x0000000f |
055bcee3 HX |
57 | |
58 | #define CRYPTO_ALG_TYPE_HASH_MASK 0x0000000e | |
004a403c | 59 | #define CRYPTO_ALG_TYPE_AHASH_MASK 0x0000000c |
332f8840 | 60 | #define CRYPTO_ALG_TYPE_BLKCIPHER_MASK 0x0000000c |
1da177e4 | 61 | |
2825982d | 62 | #define CRYPTO_ALG_LARVAL 0x00000010 |
6bfd4809 HX |
63 | #define CRYPTO_ALG_DEAD 0x00000020 |
64 | #define CRYPTO_ALG_DYING 0x00000040 | |
f3f632d6 | 65 | #define CRYPTO_ALG_ASYNC 0x00000080 |
2825982d | 66 | |
6010439f HX |
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 | ||
ecfc4329 HX |
73 | /* |
74 | * This bit is set for symmetric key ciphers that have already been wrapped | |
75 | * with a generic IV generator to prevent them from being wrapped again. | |
76 | */ | |
77 | #define CRYPTO_ALG_GENIV 0x00000200 | |
78 | ||
73d3864a HX |
79 | /* |
80 | * Set if the algorithm has passed automated run-time testing. Note that | |
81 | * if there is no run-time testing for a given algorithm it is considered | |
82 | * to have passed. | |
83 | */ | |
84 | ||
85 | #define CRYPTO_ALG_TESTED 0x00000400 | |
86 | ||
64a947b1 SK |
87 | /* |
88 | * Set if the algorithm is an instance that is build from templates. | |
89 | */ | |
90 | #define CRYPTO_ALG_INSTANCE 0x00000800 | |
91 | ||
d912bb76 NM |
92 | /* Set this bit if the algorithm provided is hardware accelerated but |
93 | * not available to userspace via instruction set or so. | |
94 | */ | |
95 | #define CRYPTO_ALG_KERN_DRIVER_ONLY 0x00001000 | |
96 | ||
1da177e4 LT |
97 | /* |
98 | * Transform masks and values (for crt_flags). | |
99 | */ | |
1da177e4 LT |
100 | #define CRYPTO_TFM_REQ_MASK 0x000fff00 |
101 | #define CRYPTO_TFM_RES_MASK 0xfff00000 | |
102 | ||
1da177e4 | 103 | #define CRYPTO_TFM_REQ_WEAK_KEY 0x00000100 |
64baf3cf | 104 | #define CRYPTO_TFM_REQ_MAY_SLEEP 0x00000200 |
32e3983f | 105 | #define CRYPTO_TFM_REQ_MAY_BACKLOG 0x00000400 |
1da177e4 LT |
106 | #define CRYPTO_TFM_RES_WEAK_KEY 0x00100000 |
107 | #define CRYPTO_TFM_RES_BAD_KEY_LEN 0x00200000 | |
108 | #define CRYPTO_TFM_RES_BAD_KEY_SCHED 0x00400000 | |
109 | #define CRYPTO_TFM_RES_BAD_BLOCK_LEN 0x00800000 | |
110 | #define CRYPTO_TFM_RES_BAD_FLAGS 0x01000000 | |
111 | ||
112 | /* | |
113 | * Miscellaneous stuff. | |
114 | */ | |
1da177e4 LT |
115 | #define CRYPTO_MAX_ALG_NAME 64 |
116 | ||
79911102 HX |
117 | /* |
118 | * The macro CRYPTO_MINALIGN_ATTR (along with the void * type in the actual | |
119 | * declaration) is used to ensure that the crypto_tfm context structure is | |
120 | * aligned correctly for the given architecture so that there are no alignment | |
121 | * faults for C data types. In particular, this is required on platforms such | |
122 | * as arm where pointers are 32-bit aligned but there are data types such as | |
123 | * u64 which require 64-bit alignment. | |
124 | */ | |
79911102 | 125 | #define CRYPTO_MINALIGN ARCH_KMALLOC_MINALIGN |
79911102 | 126 | |
79911102 | 127 | #define CRYPTO_MINALIGN_ATTR __attribute__ ((__aligned__(CRYPTO_MINALIGN))) |
79911102 | 128 | |
1da177e4 | 129 | struct scatterlist; |
32e3983f HX |
130 | struct crypto_ablkcipher; |
131 | struct crypto_async_request; | |
1ae97820 | 132 | struct crypto_aead; |
5cde0af2 | 133 | struct crypto_blkcipher; |
055bcee3 | 134 | struct crypto_hash; |
17f0f4a4 | 135 | struct crypto_rng; |
40725181 | 136 | struct crypto_tfm; |
e853c3cf | 137 | struct crypto_type; |
743edf57 | 138 | struct aead_givcrypt_request; |
61da88e2 | 139 | struct skcipher_givcrypt_request; |
40725181 | 140 | |
32e3983f HX |
141 | typedef void (*crypto_completion_t)(struct crypto_async_request *req, int err); |
142 | ||
0d7f488f SM |
143 | /** |
144 | * DOC: Block Cipher Context Data Structures | |
145 | * | |
146 | * These data structures define the operating context for each block cipher | |
147 | * type. | |
148 | */ | |
149 | ||
32e3983f HX |
150 | struct crypto_async_request { |
151 | struct list_head list; | |
152 | crypto_completion_t complete; | |
153 | void *data; | |
154 | struct crypto_tfm *tfm; | |
155 | ||
156 | u32 flags; | |
157 | }; | |
158 | ||
159 | struct ablkcipher_request { | |
160 | struct crypto_async_request base; | |
161 | ||
162 | unsigned int nbytes; | |
163 | ||
164 | void *info; | |
165 | ||
166 | struct scatterlist *src; | |
167 | struct scatterlist *dst; | |
168 | ||
169 | void *__ctx[] CRYPTO_MINALIGN_ATTR; | |
170 | }; | |
171 | ||
1ae97820 HX |
172 | /** |
173 | * struct aead_request - AEAD request | |
174 | * @base: Common attributes for async crypto requests | |
175 | * @assoclen: Length in bytes of associated data for authentication | |
176 | * @cryptlen: Length of data to be encrypted or decrypted | |
177 | * @iv: Initialisation vector | |
178 | * @assoc: Associated data | |
179 | * @src: Source data | |
180 | * @dst: Destination data | |
181 | * @__ctx: Start of private context data | |
182 | */ | |
183 | struct aead_request { | |
184 | struct crypto_async_request base; | |
185 | ||
186 | unsigned int assoclen; | |
187 | unsigned int cryptlen; | |
188 | ||
189 | u8 *iv; | |
190 | ||
191 | struct scatterlist *assoc; | |
192 | struct scatterlist *src; | |
193 | struct scatterlist *dst; | |
194 | ||
195 | void *__ctx[] CRYPTO_MINALIGN_ATTR; | |
196 | }; | |
197 | ||
5cde0af2 HX |
198 | struct blkcipher_desc { |
199 | struct crypto_blkcipher *tfm; | |
200 | void *info; | |
201 | u32 flags; | |
202 | }; | |
203 | ||
40725181 HX |
204 | struct cipher_desc { |
205 | struct crypto_tfm *tfm; | |
6c2bb98b | 206 | void (*crfn)(struct crypto_tfm *tfm, u8 *dst, const u8 *src); |
40725181 HX |
207 | unsigned int (*prfn)(const struct cipher_desc *desc, u8 *dst, |
208 | const u8 *src, unsigned int nbytes); | |
209 | void *info; | |
210 | }; | |
1da177e4 | 211 | |
055bcee3 HX |
212 | struct hash_desc { |
213 | struct crypto_hash *tfm; | |
214 | u32 flags; | |
215 | }; | |
216 | ||
0d7f488f SM |
217 | /** |
218 | * DOC: Block Cipher Algorithm Definitions | |
219 | * | |
220 | * These data structures define modular crypto algorithm implementations, | |
221 | * managed via crypto_register_alg() and crypto_unregister_alg(). | |
222 | */ | |
223 | ||
224 | /** | |
225 | * struct ablkcipher_alg - asynchronous block cipher definition | |
226 | * @min_keysize: Minimum key size supported by the transformation. This is the | |
227 | * smallest key length supported by this transformation algorithm. | |
228 | * This must be set to one of the pre-defined values as this is | |
229 | * not hardware specific. Possible values for this field can be | |
230 | * found via git grep "_MIN_KEY_SIZE" include/crypto/ | |
231 | * @max_keysize: Maximum key size supported by the transformation. This is the | |
232 | * largest key length supported by this transformation algorithm. | |
233 | * This must be set to one of the pre-defined values as this is | |
234 | * not hardware specific. Possible values for this field can be | |
235 | * found via git grep "_MAX_KEY_SIZE" include/crypto/ | |
236 | * @setkey: Set key for the transformation. This function is used to either | |
237 | * program a supplied key into the hardware or store the key in the | |
238 | * transformation context for programming it later. Note that this | |
239 | * function does modify the transformation context. This function can | |
240 | * be called multiple times during the existence of the transformation | |
241 | * object, so one must make sure the key is properly reprogrammed into | |
242 | * the hardware. This function is also responsible for checking the key | |
243 | * length for validity. In case a software fallback was put in place in | |
244 | * the @cra_init call, this function might need to use the fallback if | |
245 | * the algorithm doesn't support all of the key sizes. | |
246 | * @encrypt: Encrypt a scatterlist of blocks. This function is used to encrypt | |
247 | * the supplied scatterlist containing the blocks of data. The crypto | |
248 | * API consumer is responsible for aligning the entries of the | |
249 | * scatterlist properly and making sure the chunks are correctly | |
250 | * sized. In case a software fallback was put in place in the | |
251 | * @cra_init call, this function might need to use the fallback if | |
252 | * the algorithm doesn't support all of the key sizes. In case the | |
253 | * key was stored in transformation context, the key might need to be | |
254 | * re-programmed into the hardware in this function. This function | |
255 | * shall not modify the transformation context, as this function may | |
256 | * be called in parallel with the same transformation object. | |
257 | * @decrypt: Decrypt a single block. This is a reverse counterpart to @encrypt | |
258 | * and the conditions are exactly the same. | |
259 | * @givencrypt: Update the IV for encryption. With this function, a cipher | |
260 | * implementation may provide the function on how to update the IV | |
261 | * for encryption. | |
262 | * @givdecrypt: Update the IV for decryption. This is the reverse of | |
263 | * @givencrypt . | |
264 | * @geniv: The transformation implementation may use an "IV generator" provided | |
265 | * by the kernel crypto API. Several use cases have a predefined | |
266 | * approach how IVs are to be updated. For such use cases, the kernel | |
267 | * crypto API provides ready-to-use implementations that can be | |
268 | * referenced with this variable. | |
269 | * @ivsize: IV size applicable for transformation. The consumer must provide an | |
270 | * IV of exactly that size to perform the encrypt or decrypt operation. | |
271 | * | |
272 | * All fields except @givencrypt , @givdecrypt , @geniv and @ivsize are | |
273 | * mandatory and must be filled. | |
1da177e4 | 274 | */ |
b5b7f088 HX |
275 | struct ablkcipher_alg { |
276 | int (*setkey)(struct crypto_ablkcipher *tfm, const u8 *key, | |
277 | unsigned int keylen); | |
278 | int (*encrypt)(struct ablkcipher_request *req); | |
279 | int (*decrypt)(struct ablkcipher_request *req); | |
61da88e2 HX |
280 | int (*givencrypt)(struct skcipher_givcrypt_request *req); |
281 | int (*givdecrypt)(struct skcipher_givcrypt_request *req); | |
b5b7f088 | 282 | |
23508e11 HX |
283 | const char *geniv; |
284 | ||
b5b7f088 HX |
285 | unsigned int min_keysize; |
286 | unsigned int max_keysize; | |
287 | unsigned int ivsize; | |
288 | }; | |
289 | ||
0d7f488f SM |
290 | /** |
291 | * struct aead_alg - AEAD cipher definition | |
292 | * @maxauthsize: Set the maximum authentication tag size supported by the | |
293 | * transformation. A transformation may support smaller tag sizes. | |
294 | * As the authentication tag is a message digest to ensure the | |
295 | * integrity of the encrypted data, a consumer typically wants the | |
296 | * largest authentication tag possible as defined by this | |
297 | * variable. | |
298 | * @setauthsize: Set authentication size for the AEAD transformation. This | |
299 | * function is used to specify the consumer requested size of the | |
300 | * authentication tag to be either generated by the transformation | |
301 | * during encryption or the size of the authentication tag to be | |
302 | * supplied during the decryption operation. This function is also | |
303 | * responsible for checking the authentication tag size for | |
304 | * validity. | |
305 | * @setkey: see struct ablkcipher_alg | |
306 | * @encrypt: see struct ablkcipher_alg | |
307 | * @decrypt: see struct ablkcipher_alg | |
308 | * @givencrypt: see struct ablkcipher_alg | |
309 | * @givdecrypt: see struct ablkcipher_alg | |
310 | * @geniv: see struct ablkcipher_alg | |
311 | * @ivsize: see struct ablkcipher_alg | |
312 | * | |
313 | * All fields except @givencrypt , @givdecrypt , @geniv and @ivsize are | |
314 | * mandatory and must be filled. | |
315 | */ | |
1ae97820 HX |
316 | struct aead_alg { |
317 | int (*setkey)(struct crypto_aead *tfm, const u8 *key, | |
318 | unsigned int keylen); | |
7ba683a6 | 319 | int (*setauthsize)(struct crypto_aead *tfm, unsigned int authsize); |
1ae97820 HX |
320 | int (*encrypt)(struct aead_request *req); |
321 | int (*decrypt)(struct aead_request *req); | |
743edf57 HX |
322 | int (*givencrypt)(struct aead_givcrypt_request *req); |
323 | int (*givdecrypt)(struct aead_givcrypt_request *req); | |
1ae97820 | 324 | |
5b6d2d7f HX |
325 | const char *geniv; |
326 | ||
1ae97820 | 327 | unsigned int ivsize; |
7ba683a6 | 328 | unsigned int maxauthsize; |
1ae97820 HX |
329 | }; |
330 | ||
0d7f488f SM |
331 | /** |
332 | * struct blkcipher_alg - synchronous block cipher definition | |
333 | * @min_keysize: see struct ablkcipher_alg | |
334 | * @max_keysize: see struct ablkcipher_alg | |
335 | * @setkey: see struct ablkcipher_alg | |
336 | * @encrypt: see struct ablkcipher_alg | |
337 | * @decrypt: see struct ablkcipher_alg | |
338 | * @geniv: see struct ablkcipher_alg | |
339 | * @ivsize: see struct ablkcipher_alg | |
340 | * | |
341 | * All fields except @geniv and @ivsize are mandatory and must be filled. | |
342 | */ | |
5cde0af2 HX |
343 | struct blkcipher_alg { |
344 | int (*setkey)(struct crypto_tfm *tfm, const u8 *key, | |
345 | unsigned int keylen); | |
346 | int (*encrypt)(struct blkcipher_desc *desc, | |
347 | struct scatterlist *dst, struct scatterlist *src, | |
348 | unsigned int nbytes); | |
349 | int (*decrypt)(struct blkcipher_desc *desc, | |
350 | struct scatterlist *dst, struct scatterlist *src, | |
351 | unsigned int nbytes); | |
352 | ||
23508e11 HX |
353 | const char *geniv; |
354 | ||
5cde0af2 HX |
355 | unsigned int min_keysize; |
356 | unsigned int max_keysize; | |
357 | unsigned int ivsize; | |
358 | }; | |
359 | ||
0d7f488f SM |
360 | /** |
361 | * struct cipher_alg - single-block symmetric ciphers definition | |
362 | * @cia_min_keysize: Minimum key size supported by the transformation. This is | |
363 | * the smallest key length supported by this transformation | |
364 | * algorithm. This must be set to one of the pre-defined | |
365 | * values as this is not hardware specific. Possible values | |
366 | * for this field can be found via git grep "_MIN_KEY_SIZE" | |
367 | * include/crypto/ | |
368 | * @cia_max_keysize: Maximum key size supported by the transformation. This is | |
369 | * the largest key length supported by this transformation | |
370 | * algorithm. This must be set to one of the pre-defined values | |
371 | * as this is not hardware specific. Possible values for this | |
372 | * field can be found via git grep "_MAX_KEY_SIZE" | |
373 | * include/crypto/ | |
374 | * @cia_setkey: Set key for the transformation. This function is used to either | |
375 | * program a supplied key into the hardware or store the key in the | |
376 | * transformation context for programming it later. Note that this | |
377 | * function does modify the transformation context. This function | |
378 | * can be called multiple times during the existence of the | |
379 | * transformation object, so one must make sure the key is properly | |
380 | * reprogrammed into the hardware. This function is also | |
381 | * responsible for checking the key length for validity. | |
382 | * @cia_encrypt: Encrypt a single block. This function is used to encrypt a | |
383 | * single block of data, which must be @cra_blocksize big. This | |
384 | * always operates on a full @cra_blocksize and it is not possible | |
385 | * to encrypt a block of smaller size. The supplied buffers must | |
386 | * therefore also be at least of @cra_blocksize size. Both the | |
387 | * input and output buffers are always aligned to @cra_alignmask. | |
388 | * In case either of the input or output buffer supplied by user | |
389 | * of the crypto API is not aligned to @cra_alignmask, the crypto | |
390 | * API will re-align the buffers. The re-alignment means that a | |
391 | * new buffer will be allocated, the data will be copied into the | |
392 | * new buffer, then the processing will happen on the new buffer, | |
393 | * then the data will be copied back into the original buffer and | |
394 | * finally the new buffer will be freed. In case a software | |
395 | * fallback was put in place in the @cra_init call, this function | |
396 | * might need to use the fallback if the algorithm doesn't support | |
397 | * all of the key sizes. In case the key was stored in | |
398 | * transformation context, the key might need to be re-programmed | |
399 | * into the hardware in this function. This function shall not | |
400 | * modify the transformation context, as this function may be | |
401 | * called in parallel with the same transformation object. | |
402 | * @cia_decrypt: Decrypt a single block. This is a reverse counterpart to | |
403 | * @cia_encrypt, and the conditions are exactly the same. | |
404 | * | |
405 | * All fields are mandatory and must be filled. | |
406 | */ | |
1da177e4 LT |
407 | struct cipher_alg { |
408 | unsigned int cia_min_keysize; | |
409 | unsigned int cia_max_keysize; | |
6c2bb98b | 410 | int (*cia_setkey)(struct crypto_tfm *tfm, const u8 *key, |
560c06ae | 411 | unsigned int keylen); |
6c2bb98b HX |
412 | void (*cia_encrypt)(struct crypto_tfm *tfm, u8 *dst, const u8 *src); |
413 | void (*cia_decrypt)(struct crypto_tfm *tfm, u8 *dst, const u8 *src); | |
1da177e4 LT |
414 | }; |
415 | ||
1da177e4 | 416 | struct compress_alg { |
6c2bb98b HX |
417 | int (*coa_compress)(struct crypto_tfm *tfm, const u8 *src, |
418 | unsigned int slen, u8 *dst, unsigned int *dlen); | |
419 | int (*coa_decompress)(struct crypto_tfm *tfm, const u8 *src, | |
420 | unsigned int slen, u8 *dst, unsigned int *dlen); | |
1da177e4 LT |
421 | }; |
422 | ||
0d7f488f SM |
423 | /** |
424 | * struct rng_alg - random number generator definition | |
425 | * @rng_make_random: The function defined by this variable obtains a random | |
426 | * number. The random number generator transform must generate | |
427 | * the random number out of the context provided with this | |
428 | * call. | |
429 | * @rng_reset: Reset of the random number generator by clearing the entire state. | |
430 | * With the invocation of this function call, the random number | |
431 | * generator shall completely reinitialize its state. If the random | |
432 | * number generator requires a seed for setting up a new state, | |
433 | * the seed must be provided by the consumer while invoking this | |
434 | * function. The required size of the seed is defined with | |
435 | * @seedsize . | |
436 | * @seedsize: The seed size required for a random number generator | |
437 | * initialization defined with this variable. Some random number | |
438 | * generators like the SP800-90A DRBG does not require a seed as the | |
439 | * seeding is implemented internally without the need of support by | |
440 | * the consumer. In this case, the seed size is set to zero. | |
441 | */ | |
17f0f4a4 NH |
442 | struct rng_alg { |
443 | int (*rng_make_random)(struct crypto_rng *tfm, u8 *rdata, | |
444 | unsigned int dlen); | |
445 | int (*rng_reset)(struct crypto_rng *tfm, u8 *seed, unsigned int slen); | |
446 | ||
447 | unsigned int seedsize; | |
448 | }; | |
449 | ||
450 | ||
b5b7f088 | 451 | #define cra_ablkcipher cra_u.ablkcipher |
1ae97820 | 452 | #define cra_aead cra_u.aead |
5cde0af2 | 453 | #define cra_blkcipher cra_u.blkcipher |
1da177e4 | 454 | #define cra_cipher cra_u.cipher |
1da177e4 | 455 | #define cra_compress cra_u.compress |
17f0f4a4 | 456 | #define cra_rng cra_u.rng |
1da177e4 | 457 | |
0d7f488f SM |
458 | /** |
459 | * struct crypto_alg - definition of a cryptograpic cipher algorithm | |
460 | * @cra_flags: Flags describing this transformation. See include/linux/crypto.h | |
461 | * CRYPTO_ALG_* flags for the flags which go in here. Those are | |
462 | * used for fine-tuning the description of the transformation | |
463 | * algorithm. | |
464 | * @cra_blocksize: Minimum block size of this transformation. The size in bytes | |
465 | * of the smallest possible unit which can be transformed with | |
466 | * this algorithm. The users must respect this value. | |
467 | * In case of HASH transformation, it is possible for a smaller | |
468 | * block than @cra_blocksize to be passed to the crypto API for | |
469 | * transformation, in case of any other transformation type, an | |
470 | * error will be returned upon any attempt to transform smaller | |
471 | * than @cra_blocksize chunks. | |
472 | * @cra_ctxsize: Size of the operational context of the transformation. This | |
473 | * value informs the kernel crypto API about the memory size | |
474 | * needed to be allocated for the transformation context. | |
475 | * @cra_alignmask: Alignment mask for the input and output data buffer. The data | |
476 | * buffer containing the input data for the algorithm must be | |
477 | * aligned to this alignment mask. The data buffer for the | |
478 | * output data must be aligned to this alignment mask. Note that | |
479 | * the Crypto API will do the re-alignment in software, but | |
480 | * only under special conditions and there is a performance hit. | |
481 | * The re-alignment happens at these occasions for different | |
482 | * @cra_u types: cipher -- For both input data and output data | |
483 | * buffer; ahash -- For output hash destination buf; shash -- | |
484 | * For output hash destination buf. | |
485 | * This is needed on hardware which is flawed by design and | |
486 | * cannot pick data from arbitrary addresses. | |
487 | * @cra_priority: Priority of this transformation implementation. In case | |
488 | * multiple transformations with same @cra_name are available to | |
489 | * the Crypto API, the kernel will use the one with highest | |
490 | * @cra_priority. | |
491 | * @cra_name: Generic name (usable by multiple implementations) of the | |
492 | * transformation algorithm. This is the name of the transformation | |
493 | * itself. This field is used by the kernel when looking up the | |
494 | * providers of particular transformation. | |
495 | * @cra_driver_name: Unique name of the transformation provider. This is the | |
496 | * name of the provider of the transformation. This can be any | |
497 | * arbitrary value, but in the usual case, this contains the | |
498 | * name of the chip or provider and the name of the | |
499 | * transformation algorithm. | |
500 | * @cra_type: Type of the cryptographic transformation. This is a pointer to | |
501 | * struct crypto_type, which implements callbacks common for all | |
502 | * trasnformation types. There are multiple options: | |
503 | * &crypto_blkcipher_type, &crypto_ablkcipher_type, | |
504 | * &crypto_ahash_type, &crypto_aead_type, &crypto_rng_type. | |
505 | * This field might be empty. In that case, there are no common | |
506 | * callbacks. This is the case for: cipher, compress, shash. | |
507 | * @cra_u: Callbacks implementing the transformation. This is a union of | |
508 | * multiple structures. Depending on the type of transformation selected | |
509 | * by @cra_type and @cra_flags above, the associated structure must be | |
510 | * filled with callbacks. This field might be empty. This is the case | |
511 | * for ahash, shash. | |
512 | * @cra_init: Initialize the cryptographic transformation object. This function | |
513 | * is used to initialize the cryptographic transformation object. | |
514 | * This function is called only once at the instantiation time, right | |
515 | * after the transformation context was allocated. In case the | |
516 | * cryptographic hardware has some special requirements which need to | |
517 | * be handled by software, this function shall check for the precise | |
518 | * requirement of the transformation and put any software fallbacks | |
519 | * in place. | |
520 | * @cra_exit: Deinitialize the cryptographic transformation object. This is a | |
521 | * counterpart to @cra_init, used to remove various changes set in | |
522 | * @cra_init. | |
523 | * @cra_module: Owner of this transformation implementation. Set to THIS_MODULE | |
524 | * @cra_list: internally used | |
525 | * @cra_users: internally used | |
526 | * @cra_refcnt: internally used | |
527 | * @cra_destroy: internally used | |
528 | * | |
529 | * The struct crypto_alg describes a generic Crypto API algorithm and is common | |
530 | * for all of the transformations. Any variable not documented here shall not | |
531 | * be used by a cipher implementation as it is internal to the Crypto API. | |
532 | */ | |
1da177e4 LT |
533 | struct crypto_alg { |
534 | struct list_head cra_list; | |
6bfd4809 HX |
535 | struct list_head cra_users; |
536 | ||
1da177e4 LT |
537 | u32 cra_flags; |
538 | unsigned int cra_blocksize; | |
539 | unsigned int cra_ctxsize; | |
95477377 | 540 | unsigned int cra_alignmask; |
5cb1454b HX |
541 | |
542 | int cra_priority; | |
6521f302 | 543 | atomic_t cra_refcnt; |
5cb1454b | 544 | |
d913ea0d HX |
545 | char cra_name[CRYPTO_MAX_ALG_NAME]; |
546 | char cra_driver_name[CRYPTO_MAX_ALG_NAME]; | |
1da177e4 | 547 | |
e853c3cf HX |
548 | const struct crypto_type *cra_type; |
549 | ||
1da177e4 | 550 | union { |
b5b7f088 | 551 | struct ablkcipher_alg ablkcipher; |
1ae97820 | 552 | struct aead_alg aead; |
5cde0af2 | 553 | struct blkcipher_alg blkcipher; |
1da177e4 | 554 | struct cipher_alg cipher; |
1da177e4 | 555 | struct compress_alg compress; |
17f0f4a4 | 556 | struct rng_alg rng; |
1da177e4 | 557 | } cra_u; |
c7fc0599 HX |
558 | |
559 | int (*cra_init)(struct crypto_tfm *tfm); | |
560 | void (*cra_exit)(struct crypto_tfm *tfm); | |
6521f302 | 561 | void (*cra_destroy)(struct crypto_alg *alg); |
1da177e4 LT |
562 | |
563 | struct module *cra_module; | |
564 | }; | |
565 | ||
566 | /* | |
567 | * Algorithm registration interface. | |
568 | */ | |
569 | int crypto_register_alg(struct crypto_alg *alg); | |
570 | int crypto_unregister_alg(struct crypto_alg *alg); | |
4b004346 MB |
571 | int crypto_register_algs(struct crypto_alg *algs, int count); |
572 | int crypto_unregister_algs(struct crypto_alg *algs, int count); | |
1da177e4 LT |
573 | |
574 | /* | |
575 | * Algorithm query interface. | |
576 | */ | |
fce32d70 | 577 | int crypto_has_alg(const char *name, u32 type, u32 mask); |
1da177e4 LT |
578 | |
579 | /* | |
580 | * Transforms: user-instantiated objects which encapsulate algorithms | |
6d7d684d HX |
581 | * and core processing logic. Managed via crypto_alloc_*() and |
582 | * crypto_free_*(), as well as the various helpers below. | |
1da177e4 | 583 | */ |
1da177e4 | 584 | |
32e3983f HX |
585 | struct ablkcipher_tfm { |
586 | int (*setkey)(struct crypto_ablkcipher *tfm, const u8 *key, | |
587 | unsigned int keylen); | |
588 | int (*encrypt)(struct ablkcipher_request *req); | |
589 | int (*decrypt)(struct ablkcipher_request *req); | |
61da88e2 HX |
590 | int (*givencrypt)(struct skcipher_givcrypt_request *req); |
591 | int (*givdecrypt)(struct skcipher_givcrypt_request *req); | |
592 | ||
ecfc4329 HX |
593 | struct crypto_ablkcipher *base; |
594 | ||
32e3983f HX |
595 | unsigned int ivsize; |
596 | unsigned int reqsize; | |
597 | }; | |
598 | ||
1ae97820 HX |
599 | struct aead_tfm { |
600 | int (*setkey)(struct crypto_aead *tfm, const u8 *key, | |
601 | unsigned int keylen); | |
602 | int (*encrypt)(struct aead_request *req); | |
603 | int (*decrypt)(struct aead_request *req); | |
743edf57 HX |
604 | int (*givencrypt)(struct aead_givcrypt_request *req); |
605 | int (*givdecrypt)(struct aead_givcrypt_request *req); | |
5b6d2d7f HX |
606 | |
607 | struct crypto_aead *base; | |
608 | ||
1ae97820 HX |
609 | unsigned int ivsize; |
610 | unsigned int authsize; | |
611 | unsigned int reqsize; | |
612 | }; | |
613 | ||
5cde0af2 HX |
614 | struct blkcipher_tfm { |
615 | void *iv; | |
616 | int (*setkey)(struct crypto_tfm *tfm, const u8 *key, | |
617 | unsigned int keylen); | |
618 | int (*encrypt)(struct blkcipher_desc *desc, struct scatterlist *dst, | |
619 | struct scatterlist *src, unsigned int nbytes); | |
620 | int (*decrypt)(struct blkcipher_desc *desc, struct scatterlist *dst, | |
621 | struct scatterlist *src, unsigned int nbytes); | |
622 | }; | |
623 | ||
1da177e4 | 624 | struct cipher_tfm { |
1da177e4 LT |
625 | int (*cit_setkey)(struct crypto_tfm *tfm, |
626 | const u8 *key, unsigned int keylen); | |
f28776a3 HX |
627 | void (*cit_encrypt_one)(struct crypto_tfm *tfm, u8 *dst, const u8 *src); |
628 | void (*cit_decrypt_one)(struct crypto_tfm *tfm, u8 *dst, const u8 *src); | |
1da177e4 LT |
629 | }; |
630 | ||
055bcee3 HX |
631 | struct hash_tfm { |
632 | int (*init)(struct hash_desc *desc); | |
633 | int (*update)(struct hash_desc *desc, | |
634 | struct scatterlist *sg, unsigned int nsg); | |
635 | int (*final)(struct hash_desc *desc, u8 *out); | |
636 | int (*digest)(struct hash_desc *desc, struct scatterlist *sg, | |
637 | unsigned int nsg, u8 *out); | |
638 | int (*setkey)(struct crypto_hash *tfm, const u8 *key, | |
639 | unsigned int keylen); | |
055bcee3 | 640 | unsigned int digestsize; |
1da177e4 LT |
641 | }; |
642 | ||
643 | struct compress_tfm { | |
644 | int (*cot_compress)(struct crypto_tfm *tfm, | |
645 | const u8 *src, unsigned int slen, | |
646 | u8 *dst, unsigned int *dlen); | |
647 | int (*cot_decompress)(struct crypto_tfm *tfm, | |
648 | const u8 *src, unsigned int slen, | |
649 | u8 *dst, unsigned int *dlen); | |
650 | }; | |
651 | ||
17f0f4a4 NH |
652 | struct rng_tfm { |
653 | int (*rng_gen_random)(struct crypto_rng *tfm, u8 *rdata, | |
654 | unsigned int dlen); | |
655 | int (*rng_reset)(struct crypto_rng *tfm, u8 *seed, unsigned int slen); | |
656 | }; | |
657 | ||
32e3983f | 658 | #define crt_ablkcipher crt_u.ablkcipher |
1ae97820 | 659 | #define crt_aead crt_u.aead |
5cde0af2 | 660 | #define crt_blkcipher crt_u.blkcipher |
1da177e4 | 661 | #define crt_cipher crt_u.cipher |
055bcee3 | 662 | #define crt_hash crt_u.hash |
1da177e4 | 663 | #define crt_compress crt_u.compress |
17f0f4a4 | 664 | #define crt_rng crt_u.rng |
1da177e4 LT |
665 | |
666 | struct crypto_tfm { | |
667 | ||
668 | u32 crt_flags; | |
669 | ||
670 | union { | |
32e3983f | 671 | struct ablkcipher_tfm ablkcipher; |
1ae97820 | 672 | struct aead_tfm aead; |
5cde0af2 | 673 | struct blkcipher_tfm blkcipher; |
1da177e4 | 674 | struct cipher_tfm cipher; |
055bcee3 | 675 | struct hash_tfm hash; |
1da177e4 | 676 | struct compress_tfm compress; |
17f0f4a4 | 677 | struct rng_tfm rng; |
1da177e4 | 678 | } crt_u; |
4a779486 HX |
679 | |
680 | void (*exit)(struct crypto_tfm *tfm); | |
1da177e4 LT |
681 | |
682 | struct crypto_alg *__crt_alg; | |
f10b7897 | 683 | |
79911102 | 684 | void *__crt_ctx[] CRYPTO_MINALIGN_ATTR; |
1da177e4 LT |
685 | }; |
686 | ||
32e3983f HX |
687 | struct crypto_ablkcipher { |
688 | struct crypto_tfm base; | |
689 | }; | |
690 | ||
1ae97820 HX |
691 | struct crypto_aead { |
692 | struct crypto_tfm base; | |
693 | }; | |
694 | ||
5cde0af2 HX |
695 | struct crypto_blkcipher { |
696 | struct crypto_tfm base; | |
697 | }; | |
698 | ||
78a1fe4f HX |
699 | struct crypto_cipher { |
700 | struct crypto_tfm base; | |
701 | }; | |
702 | ||
703 | struct crypto_comp { | |
704 | struct crypto_tfm base; | |
705 | }; | |
706 | ||
055bcee3 HX |
707 | struct crypto_hash { |
708 | struct crypto_tfm base; | |
709 | }; | |
710 | ||
17f0f4a4 NH |
711 | struct crypto_rng { |
712 | struct crypto_tfm base; | |
713 | }; | |
714 | ||
2b8c19db HX |
715 | enum { |
716 | CRYPTOA_UNSPEC, | |
717 | CRYPTOA_ALG, | |
ebc610e5 | 718 | CRYPTOA_TYPE, |
39e1ee01 | 719 | CRYPTOA_U32, |
ebc610e5 | 720 | __CRYPTOA_MAX, |
2b8c19db HX |
721 | }; |
722 | ||
ebc610e5 HX |
723 | #define CRYPTOA_MAX (__CRYPTOA_MAX - 1) |
724 | ||
39e1ee01 HX |
725 | /* Maximum number of (rtattr) parameters for each template. */ |
726 | #define CRYPTO_MAX_ATTRS 32 | |
727 | ||
2b8c19db HX |
728 | struct crypto_attr_alg { |
729 | char name[CRYPTO_MAX_ALG_NAME]; | |
730 | }; | |
731 | ||
ebc610e5 HX |
732 | struct crypto_attr_type { |
733 | u32 type; | |
734 | u32 mask; | |
735 | }; | |
736 | ||
39e1ee01 HX |
737 | struct crypto_attr_u32 { |
738 | u32 num; | |
739 | }; | |
740 | ||
1da177e4 LT |
741 | /* |
742 | * Transform user interface. | |
743 | */ | |
744 | ||
6d7d684d | 745 | struct crypto_tfm *crypto_alloc_base(const char *alg_name, u32 type, u32 mask); |
7b2cd92a HX |
746 | void crypto_destroy_tfm(void *mem, struct crypto_tfm *tfm); |
747 | ||
748 | static inline void crypto_free_tfm(struct crypto_tfm *tfm) | |
749 | { | |
750 | return crypto_destroy_tfm(tfm, tfm); | |
751 | } | |
1da177e4 | 752 | |
da7f033d HX |
753 | int alg_test(const char *driver, const char *alg, u32 type, u32 mask); |
754 | ||
1da177e4 LT |
755 | /* |
756 | * Transform helpers which query the underlying algorithm. | |
757 | */ | |
758 | static inline const char *crypto_tfm_alg_name(struct crypto_tfm *tfm) | |
759 | { | |
760 | return tfm->__crt_alg->cra_name; | |
761 | } | |
762 | ||
b14cdd67 ML |
763 | static inline const char *crypto_tfm_alg_driver_name(struct crypto_tfm *tfm) |
764 | { | |
765 | return tfm->__crt_alg->cra_driver_name; | |
766 | } | |
767 | ||
768 | static inline int crypto_tfm_alg_priority(struct crypto_tfm *tfm) | |
769 | { | |
770 | return tfm->__crt_alg->cra_priority; | |
771 | } | |
772 | ||
1da177e4 LT |
773 | static inline u32 crypto_tfm_alg_type(struct crypto_tfm *tfm) |
774 | { | |
775 | return tfm->__crt_alg->cra_flags & CRYPTO_ALG_TYPE_MASK; | |
776 | } | |
777 | ||
1da177e4 LT |
778 | static inline unsigned int crypto_tfm_alg_blocksize(struct crypto_tfm *tfm) |
779 | { | |
780 | return tfm->__crt_alg->cra_blocksize; | |
781 | } | |
782 | ||
fbdae9f3 HX |
783 | static inline unsigned int crypto_tfm_alg_alignmask(struct crypto_tfm *tfm) |
784 | { | |
785 | return tfm->__crt_alg->cra_alignmask; | |
786 | } | |
787 | ||
f28776a3 HX |
788 | static inline u32 crypto_tfm_get_flags(struct crypto_tfm *tfm) |
789 | { | |
790 | return tfm->crt_flags; | |
791 | } | |
792 | ||
793 | static inline void crypto_tfm_set_flags(struct crypto_tfm *tfm, u32 flags) | |
794 | { | |
795 | tfm->crt_flags |= flags; | |
796 | } | |
797 | ||
798 | static inline void crypto_tfm_clear_flags(struct crypto_tfm *tfm, u32 flags) | |
799 | { | |
800 | tfm->crt_flags &= ~flags; | |
801 | } | |
802 | ||
40725181 HX |
803 | static inline void *crypto_tfm_ctx(struct crypto_tfm *tfm) |
804 | { | |
f10b7897 HX |
805 | return tfm->__crt_ctx; |
806 | } | |
807 | ||
808 | static inline unsigned int crypto_tfm_ctx_alignment(void) | |
809 | { | |
810 | struct crypto_tfm *tfm; | |
811 | return __alignof__(tfm->__crt_ctx); | |
40725181 HX |
812 | } |
813 | ||
1da177e4 LT |
814 | /* |
815 | * API wrappers. | |
816 | */ | |
32e3983f HX |
817 | static inline struct crypto_ablkcipher *__crypto_ablkcipher_cast( |
818 | struct crypto_tfm *tfm) | |
819 | { | |
820 | return (struct crypto_ablkcipher *)tfm; | |
821 | } | |
822 | ||
378f4f51 | 823 | static inline u32 crypto_skcipher_type(u32 type) |
32e3983f | 824 | { |
ecfc4329 | 825 | type &= ~(CRYPTO_ALG_TYPE_MASK | CRYPTO_ALG_GENIV); |
32e3983f | 826 | type |= CRYPTO_ALG_TYPE_BLKCIPHER; |
378f4f51 HX |
827 | return type; |
828 | } | |
829 | ||
830 | static inline u32 crypto_skcipher_mask(u32 mask) | |
831 | { | |
ecfc4329 | 832 | mask &= ~(CRYPTO_ALG_TYPE_MASK | CRYPTO_ALG_GENIV); |
332f8840 | 833 | mask |= CRYPTO_ALG_TYPE_BLKCIPHER_MASK; |
378f4f51 HX |
834 | return mask; |
835 | } | |
32e3983f | 836 | |
f13ec330 SM |
837 | /** |
838 | * DOC: Asynchronous Block Cipher API | |
839 | * | |
840 | * Asynchronous block cipher API is used with the ciphers of type | |
841 | * CRYPTO_ALG_TYPE_ABLKCIPHER (listed as type "ablkcipher" in /proc/crypto). | |
842 | * | |
843 | * Asynchronous cipher operations imply that the function invocation for a | |
844 | * cipher request returns immediately before the completion of the operation. | |
845 | * The cipher request is scheduled as a separate kernel thread and therefore | |
846 | * load-balanced on the different CPUs via the process scheduler. To allow | |
847 | * the kernel crypto API to inform the caller about the completion of a cipher | |
848 | * request, the caller must provide a callback function. That function is | |
849 | * invoked with the cipher handle when the request completes. | |
850 | * | |
851 | * To support the asynchronous operation, additional information than just the | |
852 | * cipher handle must be supplied to the kernel crypto API. That additional | |
853 | * information is given by filling in the ablkcipher_request data structure. | |
854 | * | |
855 | * For the asynchronous block cipher API, the state is maintained with the tfm | |
856 | * cipher handle. A single tfm can be used across multiple calls and in | |
857 | * parallel. For asynchronous block cipher calls, context data supplied and | |
858 | * only used by the caller can be referenced the request data structure in | |
859 | * addition to the IV used for the cipher request. The maintenance of such | |
860 | * state information would be important for a crypto driver implementer to | |
861 | * have, because when calling the callback function upon completion of the | |
862 | * cipher operation, that callback function may need some information about | |
863 | * which operation just finished if it invoked multiple in parallel. This | |
864 | * state information is unused by the kernel crypto API. | |
865 | */ | |
866 | ||
867 | /** | |
868 | * crypto_alloc_ablkcipher() - allocate asynchronous block cipher handle | |
869 | * @alg_name: is the cra_name / name or cra_driver_name / driver name of the | |
870 | * ablkcipher cipher | |
871 | * @type: specifies the type of the cipher | |
872 | * @mask: specifies the mask for the cipher | |
873 | * | |
874 | * Allocate a cipher handle for an ablkcipher. The returned struct | |
875 | * crypto_ablkcipher is the cipher handle that is required for any subsequent | |
876 | * API invocation for that ablkcipher. | |
877 | * | |
878 | * Return: allocated cipher handle in case of success; IS_ERR() is true in case | |
879 | * of an error, PTR_ERR() returns the error code. | |
880 | */ | |
b9c55aa4 HX |
881 | struct crypto_ablkcipher *crypto_alloc_ablkcipher(const char *alg_name, |
882 | u32 type, u32 mask); | |
32e3983f HX |
883 | |
884 | static inline struct crypto_tfm *crypto_ablkcipher_tfm( | |
885 | struct crypto_ablkcipher *tfm) | |
886 | { | |
887 | return &tfm->base; | |
888 | } | |
889 | ||
f13ec330 SM |
890 | /** |
891 | * crypto_free_ablkcipher() - zeroize and free cipher handle | |
892 | * @tfm: cipher handle to be freed | |
893 | */ | |
32e3983f HX |
894 | static inline void crypto_free_ablkcipher(struct crypto_ablkcipher *tfm) |
895 | { | |
896 | crypto_free_tfm(crypto_ablkcipher_tfm(tfm)); | |
897 | } | |
898 | ||
f13ec330 SM |
899 | /** |
900 | * crypto_has_ablkcipher() - Search for the availability of an ablkcipher. | |
901 | * @alg_name: is the cra_name / name or cra_driver_name / driver name of the | |
902 | * ablkcipher | |
903 | * @type: specifies the type of the cipher | |
904 | * @mask: specifies the mask for the cipher | |
905 | * | |
906 | * Return: true when the ablkcipher is known to the kernel crypto API; false | |
907 | * otherwise | |
908 | */ | |
32e3983f HX |
909 | static inline int crypto_has_ablkcipher(const char *alg_name, u32 type, |
910 | u32 mask) | |
911 | { | |
378f4f51 HX |
912 | return crypto_has_alg(alg_name, crypto_skcipher_type(type), |
913 | crypto_skcipher_mask(mask)); | |
32e3983f HX |
914 | } |
915 | ||
916 | static inline struct ablkcipher_tfm *crypto_ablkcipher_crt( | |
917 | struct crypto_ablkcipher *tfm) | |
918 | { | |
919 | return &crypto_ablkcipher_tfm(tfm)->crt_ablkcipher; | |
920 | } | |
921 | ||
f13ec330 SM |
922 | /** |
923 | * crypto_ablkcipher_ivsize() - obtain IV size | |
924 | * @tfm: cipher handle | |
925 | * | |
926 | * The size of the IV for the ablkcipher referenced by the cipher handle is | |
927 | * returned. This IV size may be zero if the cipher does not need an IV. | |
928 | * | |
929 | * Return: IV size in bytes | |
930 | */ | |
32e3983f HX |
931 | static inline unsigned int crypto_ablkcipher_ivsize( |
932 | struct crypto_ablkcipher *tfm) | |
933 | { | |
934 | return crypto_ablkcipher_crt(tfm)->ivsize; | |
935 | } | |
936 | ||
f13ec330 SM |
937 | /** |
938 | * crypto_ablkcipher_blocksize() - obtain block size of cipher | |
939 | * @tfm: cipher handle | |
940 | * | |
941 | * The block size for the ablkcipher referenced with the cipher handle is | |
942 | * returned. The caller may use that information to allocate appropriate | |
943 | * memory for the data returned by the encryption or decryption operation | |
944 | * | |
945 | * Return: block size of cipher | |
946 | */ | |
32e3983f HX |
947 | static inline unsigned int crypto_ablkcipher_blocksize( |
948 | struct crypto_ablkcipher *tfm) | |
949 | { | |
950 | return crypto_tfm_alg_blocksize(crypto_ablkcipher_tfm(tfm)); | |
951 | } | |
952 | ||
953 | static inline unsigned int crypto_ablkcipher_alignmask( | |
954 | struct crypto_ablkcipher *tfm) | |
955 | { | |
956 | return crypto_tfm_alg_alignmask(crypto_ablkcipher_tfm(tfm)); | |
957 | } | |
958 | ||
959 | static inline u32 crypto_ablkcipher_get_flags(struct crypto_ablkcipher *tfm) | |
960 | { | |
961 | return crypto_tfm_get_flags(crypto_ablkcipher_tfm(tfm)); | |
962 | } | |
963 | ||
964 | static inline void crypto_ablkcipher_set_flags(struct crypto_ablkcipher *tfm, | |
965 | u32 flags) | |
966 | { | |
967 | crypto_tfm_set_flags(crypto_ablkcipher_tfm(tfm), flags); | |
968 | } | |
969 | ||
970 | static inline void crypto_ablkcipher_clear_flags(struct crypto_ablkcipher *tfm, | |
971 | u32 flags) | |
972 | { | |
973 | crypto_tfm_clear_flags(crypto_ablkcipher_tfm(tfm), flags); | |
974 | } | |
975 | ||
f13ec330 SM |
976 | /** |
977 | * crypto_ablkcipher_setkey() - set key for cipher | |
978 | * @tfm: cipher handle | |
979 | * @key: buffer holding the key | |
980 | * @keylen: length of the key in bytes | |
981 | * | |
982 | * The caller provided key is set for the ablkcipher referenced by the cipher | |
983 | * handle. | |
984 | * | |
985 | * Note, the key length determines the cipher type. Many block ciphers implement | |
986 | * different cipher modes depending on the key size, such as AES-128 vs AES-192 | |
987 | * vs. AES-256. When providing a 16 byte key for an AES cipher handle, AES-128 | |
988 | * is performed. | |
989 | * | |
990 | * Return: 0 if the setting of the key was successful; < 0 if an error occurred | |
991 | */ | |
32e3983f HX |
992 | static inline int crypto_ablkcipher_setkey(struct crypto_ablkcipher *tfm, |
993 | const u8 *key, unsigned int keylen) | |
994 | { | |
ecfc4329 HX |
995 | struct ablkcipher_tfm *crt = crypto_ablkcipher_crt(tfm); |
996 | ||
997 | return crt->setkey(crt->base, key, keylen); | |
32e3983f HX |
998 | } |
999 | ||
f13ec330 SM |
1000 | /** |
1001 | * crypto_ablkcipher_reqtfm() - obtain cipher handle from request | |
1002 | * @req: ablkcipher_request out of which the cipher handle is to be obtained | |
1003 | * | |
1004 | * Return the crypto_ablkcipher handle when furnishing an ablkcipher_request | |
1005 | * data structure. | |
1006 | * | |
1007 | * Return: crypto_ablkcipher handle | |
1008 | */ | |
32e3983f HX |
1009 | static inline struct crypto_ablkcipher *crypto_ablkcipher_reqtfm( |
1010 | struct ablkcipher_request *req) | |
1011 | { | |
1012 | return __crypto_ablkcipher_cast(req->base.tfm); | |
1013 | } | |
1014 | ||
f13ec330 SM |
1015 | /** |
1016 | * crypto_ablkcipher_encrypt() - encrypt plaintext | |
1017 | * @req: reference to the ablkcipher_request handle that holds all information | |
1018 | * needed to perform the cipher operation | |
1019 | * | |
1020 | * Encrypt plaintext data using the ablkcipher_request handle. That data | |
1021 | * structure and how it is filled with data is discussed with the | |
1022 | * ablkcipher_request_* functions. | |
1023 | * | |
1024 | * Return: 0 if the cipher operation was successful; < 0 if an error occurred | |
1025 | */ | |
32e3983f HX |
1026 | static inline int crypto_ablkcipher_encrypt(struct ablkcipher_request *req) |
1027 | { | |
1028 | struct ablkcipher_tfm *crt = | |
1029 | crypto_ablkcipher_crt(crypto_ablkcipher_reqtfm(req)); | |
1030 | return crt->encrypt(req); | |
1031 | } | |
1032 | ||
f13ec330 SM |
1033 | /** |
1034 | * crypto_ablkcipher_decrypt() - decrypt ciphertext | |
1035 | * @req: reference to the ablkcipher_request handle that holds all information | |
1036 | * needed to perform the cipher operation | |
1037 | * | |
1038 | * Decrypt ciphertext data using the ablkcipher_request handle. That data | |
1039 | * structure and how it is filled with data is discussed with the | |
1040 | * ablkcipher_request_* functions. | |
1041 | * | |
1042 | * Return: 0 if the cipher operation was successful; < 0 if an error occurred | |
1043 | */ | |
32e3983f HX |
1044 | static inline int crypto_ablkcipher_decrypt(struct ablkcipher_request *req) |
1045 | { | |
1046 | struct ablkcipher_tfm *crt = | |
1047 | crypto_ablkcipher_crt(crypto_ablkcipher_reqtfm(req)); | |
1048 | return crt->decrypt(req); | |
1049 | } | |
1050 | ||
f13ec330 SM |
1051 | /** |
1052 | * DOC: Asynchronous Cipher Request Handle | |
1053 | * | |
1054 | * The ablkcipher_request data structure contains all pointers to data | |
1055 | * required for the asynchronous cipher operation. This includes the cipher | |
1056 | * handle (which can be used by multiple ablkcipher_request instances), pointer | |
1057 | * to plaintext and ciphertext, asynchronous callback function, etc. It acts | |
1058 | * as a handle to the ablkcipher_request_* API calls in a similar way as | |
1059 | * ablkcipher handle to the crypto_ablkcipher_* API calls. | |
1060 | */ | |
1061 | ||
1062 | /** | |
1063 | * crypto_ablkcipher_reqsize() - obtain size of the request data structure | |
1064 | * @tfm: cipher handle | |
1065 | * | |
1066 | * Return: number of bytes | |
1067 | */ | |
b16c3a2e HX |
1068 | static inline unsigned int crypto_ablkcipher_reqsize( |
1069 | struct crypto_ablkcipher *tfm) | |
32e3983f HX |
1070 | { |
1071 | return crypto_ablkcipher_crt(tfm)->reqsize; | |
1072 | } | |
1073 | ||
f13ec330 SM |
1074 | /** |
1075 | * ablkcipher_request_set_tfm() - update cipher handle reference in request | |
1076 | * @req: request handle to be modified | |
1077 | * @tfm: cipher handle that shall be added to the request handle | |
1078 | * | |
1079 | * Allow the caller to replace the existing ablkcipher handle in the request | |
1080 | * data structure with a different one. | |
1081 | */ | |
e196d625 HX |
1082 | static inline void ablkcipher_request_set_tfm( |
1083 | struct ablkcipher_request *req, struct crypto_ablkcipher *tfm) | |
1084 | { | |
ecfc4329 | 1085 | req->base.tfm = crypto_ablkcipher_tfm(crypto_ablkcipher_crt(tfm)->base); |
e196d625 HX |
1086 | } |
1087 | ||
b5b7f088 HX |
1088 | static inline struct ablkcipher_request *ablkcipher_request_cast( |
1089 | struct crypto_async_request *req) | |
1090 | { | |
1091 | return container_of(req, struct ablkcipher_request, base); | |
1092 | } | |
1093 | ||
f13ec330 SM |
1094 | /** |
1095 | * ablkcipher_request_alloc() - allocate request data structure | |
1096 | * @tfm: cipher handle to be registered with the request | |
1097 | * @gfp: memory allocation flag that is handed to kmalloc by the API call. | |
1098 | * | |
1099 | * Allocate the request data structure that must be used with the ablkcipher | |
1100 | * encrypt and decrypt API calls. During the allocation, the provided ablkcipher | |
1101 | * handle is registered in the request data structure. | |
1102 | * | |
1103 | * Return: allocated request handle in case of success; IS_ERR() is true in case | |
1104 | * of an error, PTR_ERR() returns the error code. | |
1105 | */ | |
32e3983f HX |
1106 | static inline struct ablkcipher_request *ablkcipher_request_alloc( |
1107 | struct crypto_ablkcipher *tfm, gfp_t gfp) | |
1108 | { | |
1109 | struct ablkcipher_request *req; | |
1110 | ||
1111 | req = kmalloc(sizeof(struct ablkcipher_request) + | |
1112 | crypto_ablkcipher_reqsize(tfm), gfp); | |
1113 | ||
1114 | if (likely(req)) | |
e196d625 | 1115 | ablkcipher_request_set_tfm(req, tfm); |
32e3983f HX |
1116 | |
1117 | return req; | |
1118 | } | |
1119 | ||
f13ec330 SM |
1120 | /** |
1121 | * ablkcipher_request_free() - zeroize and free request data structure | |
1122 | * @req: request data structure cipher handle to be freed | |
1123 | */ | |
32e3983f HX |
1124 | static inline void ablkcipher_request_free(struct ablkcipher_request *req) |
1125 | { | |
aef73cfc | 1126 | kzfree(req); |
32e3983f HX |
1127 | } |
1128 | ||
f13ec330 SM |
1129 | /** |
1130 | * ablkcipher_request_set_callback() - set asynchronous callback function | |
1131 | * @req: request handle | |
1132 | * @flags: specify zero or an ORing of the flags | |
1133 | * CRYPTO_TFM_REQ_MAY_BACKLOG the request queue may back log and | |
1134 | * increase the wait queue beyond the initial maximum size; | |
1135 | * CRYPTO_TFM_REQ_MAY_SLEEP the request processing may sleep | |
1136 | * @compl: callback function pointer to be registered with the request handle | |
1137 | * @data: The data pointer refers to memory that is not used by the kernel | |
1138 | * crypto API, but provided to the callback function for it to use. Here, | |
1139 | * the caller can provide a reference to memory the callback function can | |
1140 | * operate on. As the callback function is invoked asynchronously to the | |
1141 | * related functionality, it may need to access data structures of the | |
1142 | * related functionality which can be referenced using this pointer. The | |
1143 | * callback function can access the memory via the "data" field in the | |
1144 | * crypto_async_request data structure provided to the callback function. | |
1145 | * | |
1146 | * This function allows setting the callback function that is triggered once the | |
1147 | * cipher operation completes. | |
1148 | * | |
1149 | * The callback function is registered with the ablkcipher_request handle and | |
1150 | * must comply with the following template: | |
1151 | * | |
1152 | * void callback_function(struct crypto_async_request *req, int error) | |
1153 | */ | |
32e3983f HX |
1154 | static inline void ablkcipher_request_set_callback( |
1155 | struct ablkcipher_request *req, | |
3e3dc25f | 1156 | u32 flags, crypto_completion_t compl, void *data) |
32e3983f | 1157 | { |
3e3dc25f | 1158 | req->base.complete = compl; |
32e3983f HX |
1159 | req->base.data = data; |
1160 | req->base.flags = flags; | |
1161 | } | |
1162 | ||
f13ec330 SM |
1163 | /** |
1164 | * ablkcipher_request_set_crypt() - set data buffers | |
1165 | * @req: request handle | |
1166 | * @src: source scatter / gather list | |
1167 | * @dst: destination scatter / gather list | |
1168 | * @nbytes: number of bytes to process from @src | |
1169 | * @iv: IV for the cipher operation which must comply with the IV size defined | |
1170 | * by crypto_ablkcipher_ivsize | |
1171 | * | |
1172 | * This function allows setting of the source data and destination data | |
1173 | * scatter / gather lists. | |
1174 | * | |
1175 | * For encryption, the source is treated as the plaintext and the | |
1176 | * destination is the ciphertext. For a decryption operation, the use is | |
1177 | * reversed: the source is the ciphertext and the destination is the plaintext. | |
1178 | */ | |
32e3983f HX |
1179 | static inline void ablkcipher_request_set_crypt( |
1180 | struct ablkcipher_request *req, | |
1181 | struct scatterlist *src, struct scatterlist *dst, | |
1182 | unsigned int nbytes, void *iv) | |
1183 | { | |
1184 | req->src = src; | |
1185 | req->dst = dst; | |
1186 | req->nbytes = nbytes; | |
1187 | req->info = iv; | |
1188 | } | |
1189 | ||
fced7b02 SM |
1190 | /** |
1191 | * DOC: Authenticated Encryption With Associated Data (AEAD) Cipher API | |
1192 | * | |
1193 | * The AEAD cipher API is used with the ciphers of type CRYPTO_ALG_TYPE_AEAD | |
1194 | * (listed as type "aead" in /proc/crypto) | |
1195 | * | |
1196 | * The most prominent examples for this type of encryption is GCM and CCM. | |
1197 | * However, the kernel supports other types of AEAD ciphers which are defined | |
1198 | * with the following cipher string: | |
1199 | * | |
1200 | * authenc(keyed message digest, block cipher) | |
1201 | * | |
1202 | * For example: authenc(hmac(sha256), cbc(aes)) | |
1203 | * | |
1204 | * The example code provided for the asynchronous block cipher operation | |
1205 | * applies here as well. Naturally all *ablkcipher* symbols must be exchanged | |
1206 | * the *aead* pendants discussed in the following. In addtion, for the AEAD | |
1207 | * operation, the aead_request_set_assoc function must be used to set the | |
1208 | * pointer to the associated data memory location before performing the | |
1209 | * encryption or decryption operation. In case of an encryption, the associated | |
1210 | * data memory is filled during the encryption operation. For decryption, the | |
1211 | * associated data memory must contain data that is used to verify the integrity | |
1212 | * of the decrypted data. Another deviation from the asynchronous block cipher | |
1213 | * operation is that the caller should explicitly check for -EBADMSG of the | |
1214 | * crypto_aead_decrypt. That error indicates an authentication error, i.e. | |
1215 | * a breach in the integrity of the message. In essence, that -EBADMSG error | |
1216 | * code is the key bonus an AEAD cipher has over "standard" block chaining | |
1217 | * modes. | |
1218 | */ | |
1219 | ||
1ae97820 HX |
1220 | static inline struct crypto_aead *__crypto_aead_cast(struct crypto_tfm *tfm) |
1221 | { | |
1222 | return (struct crypto_aead *)tfm; | |
1223 | } | |
1224 | ||
fced7b02 SM |
1225 | /** |
1226 | * crypto_alloc_aead() - allocate AEAD cipher handle | |
1227 | * @alg_name: is the cra_name / name or cra_driver_name / driver name of the | |
1228 | * AEAD cipher | |
1229 | * @type: specifies the type of the cipher | |
1230 | * @mask: specifies the mask for the cipher | |
1231 | * | |
1232 | * Allocate a cipher handle for an AEAD. The returned struct | |
1233 | * crypto_aead is the cipher handle that is required for any subsequent | |
1234 | * API invocation for that AEAD. | |
1235 | * | |
1236 | * Return: allocated cipher handle in case of success; IS_ERR() is true in case | |
1237 | * of an error, PTR_ERR() returns the error code. | |
1238 | */ | |
d29ce988 | 1239 | struct crypto_aead *crypto_alloc_aead(const char *alg_name, u32 type, u32 mask); |
1ae97820 HX |
1240 | |
1241 | static inline struct crypto_tfm *crypto_aead_tfm(struct crypto_aead *tfm) | |
1242 | { | |
1243 | return &tfm->base; | |
1244 | } | |
1245 | ||
fced7b02 SM |
1246 | /** |
1247 | * crypto_free_aead() - zeroize and free aead handle | |
1248 | * @tfm: cipher handle to be freed | |
1249 | */ | |
1ae97820 HX |
1250 | static inline void crypto_free_aead(struct crypto_aead *tfm) |
1251 | { | |
1252 | crypto_free_tfm(crypto_aead_tfm(tfm)); | |
1253 | } | |
1254 | ||
1255 | static inline struct aead_tfm *crypto_aead_crt(struct crypto_aead *tfm) | |
1256 | { | |
1257 | return &crypto_aead_tfm(tfm)->crt_aead; | |
1258 | } | |
1259 | ||
fced7b02 SM |
1260 | /** |
1261 | * crypto_aead_ivsize() - obtain IV size | |
1262 | * @tfm: cipher handle | |
1263 | * | |
1264 | * The size of the IV for the aead referenced by the cipher handle is | |
1265 | * returned. This IV size may be zero if the cipher does not need an IV. | |
1266 | * | |
1267 | * Return: IV size in bytes | |
1268 | */ | |
1ae97820 HX |
1269 | static inline unsigned int crypto_aead_ivsize(struct crypto_aead *tfm) |
1270 | { | |
1271 | return crypto_aead_crt(tfm)->ivsize; | |
1272 | } | |
1273 | ||
fced7b02 SM |
1274 | /** |
1275 | * crypto_aead_authsize() - obtain maximum authentication data size | |
1276 | * @tfm: cipher handle | |
1277 | * | |
1278 | * The maximum size of the authentication data for the AEAD cipher referenced | |
1279 | * by the AEAD cipher handle is returned. The authentication data size may be | |
1280 | * zero if the cipher implements a hard-coded maximum. | |
1281 | * | |
1282 | * The authentication data may also be known as "tag value". | |
1283 | * | |
1284 | * Return: authentication data size / tag size in bytes | |
1285 | */ | |
1ae97820 HX |
1286 | static inline unsigned int crypto_aead_authsize(struct crypto_aead *tfm) |
1287 | { | |
1288 | return crypto_aead_crt(tfm)->authsize; | |
1289 | } | |
1290 | ||
fced7b02 SM |
1291 | /** |
1292 | * crypto_aead_blocksize() - obtain block size of cipher | |
1293 | * @tfm: cipher handle | |
1294 | * | |
1295 | * The block size for the AEAD referenced with the cipher handle is returned. | |
1296 | * The caller may use that information to allocate appropriate memory for the | |
1297 | * data returned by the encryption or decryption operation | |
1298 | * | |
1299 | * Return: block size of cipher | |
1300 | */ | |
1ae97820 HX |
1301 | static inline unsigned int crypto_aead_blocksize(struct crypto_aead *tfm) |
1302 | { | |
1303 | return crypto_tfm_alg_blocksize(crypto_aead_tfm(tfm)); | |
1304 | } | |
1305 | ||
1306 | static inline unsigned int crypto_aead_alignmask(struct crypto_aead *tfm) | |
1307 | { | |
1308 | return crypto_tfm_alg_alignmask(crypto_aead_tfm(tfm)); | |
1309 | } | |
1310 | ||
1311 | static inline u32 crypto_aead_get_flags(struct crypto_aead *tfm) | |
1312 | { | |
1313 | return crypto_tfm_get_flags(crypto_aead_tfm(tfm)); | |
1314 | } | |
1315 | ||
1316 | static inline void crypto_aead_set_flags(struct crypto_aead *tfm, u32 flags) | |
1317 | { | |
1318 | crypto_tfm_set_flags(crypto_aead_tfm(tfm), flags); | |
1319 | } | |
1320 | ||
1321 | static inline void crypto_aead_clear_flags(struct crypto_aead *tfm, u32 flags) | |
1322 | { | |
1323 | crypto_tfm_clear_flags(crypto_aead_tfm(tfm), flags); | |
1324 | } | |
1325 | ||
fced7b02 SM |
1326 | /** |
1327 | * crypto_aead_setkey() - set key for cipher | |
1328 | * @tfm: cipher handle | |
1329 | * @key: buffer holding the key | |
1330 | * @keylen: length of the key in bytes | |
1331 | * | |
1332 | * The caller provided key is set for the AEAD referenced by the cipher | |
1333 | * handle. | |
1334 | * | |
1335 | * Note, the key length determines the cipher type. Many block ciphers implement | |
1336 | * different cipher modes depending on the key size, such as AES-128 vs AES-192 | |
1337 | * vs. AES-256. When providing a 16 byte key for an AES cipher handle, AES-128 | |
1338 | * is performed. | |
1339 | * | |
1340 | * Return: 0 if the setting of the key was successful; < 0 if an error occurred | |
1341 | */ | |
1ae97820 HX |
1342 | static inline int crypto_aead_setkey(struct crypto_aead *tfm, const u8 *key, |
1343 | unsigned int keylen) | |
1344 | { | |
5b6d2d7f HX |
1345 | struct aead_tfm *crt = crypto_aead_crt(tfm); |
1346 | ||
1347 | return crt->setkey(crt->base, key, keylen); | |
1ae97820 HX |
1348 | } |
1349 | ||
fced7b02 SM |
1350 | /** |
1351 | * crypto_aead_setauthsize() - set authentication data size | |
1352 | * @tfm: cipher handle | |
1353 | * @authsize: size of the authentication data / tag in bytes | |
1354 | * | |
1355 | * Set the authentication data size / tag size. AEAD requires an authentication | |
1356 | * tag (or MAC) in addition to the associated data. | |
1357 | * | |
1358 | * Return: 0 if the setting of the key was successful; < 0 if an error occurred | |
1359 | */ | |
7ba683a6 HX |
1360 | int crypto_aead_setauthsize(struct crypto_aead *tfm, unsigned int authsize); |
1361 | ||
1ae97820 HX |
1362 | static inline struct crypto_aead *crypto_aead_reqtfm(struct aead_request *req) |
1363 | { | |
1364 | return __crypto_aead_cast(req->base.tfm); | |
1365 | } | |
1366 | ||
fced7b02 SM |
1367 | /** |
1368 | * crypto_aead_encrypt() - encrypt plaintext | |
1369 | * @req: reference to the aead_request handle that holds all information | |
1370 | * needed to perform the cipher operation | |
1371 | * | |
1372 | * Encrypt plaintext data using the aead_request handle. That data structure | |
1373 | * and how it is filled with data is discussed with the aead_request_* | |
1374 | * functions. | |
1375 | * | |
1376 | * IMPORTANT NOTE The encryption operation creates the authentication data / | |
1377 | * tag. That data is concatenated with the created ciphertext. | |
1378 | * The ciphertext memory size is therefore the given number of | |
1379 | * block cipher blocks + the size defined by the | |
1380 | * crypto_aead_setauthsize invocation. The caller must ensure | |
1381 | * that sufficient memory is available for the ciphertext and | |
1382 | * the authentication tag. | |
1383 | * | |
1384 | * Return: 0 if the cipher operation was successful; < 0 if an error occurred | |
1385 | */ | |
1ae97820 HX |
1386 | static inline int crypto_aead_encrypt(struct aead_request *req) |
1387 | { | |
1388 | return crypto_aead_crt(crypto_aead_reqtfm(req))->encrypt(req); | |
1389 | } | |
1390 | ||
fced7b02 SM |
1391 | /** |
1392 | * crypto_aead_decrypt() - decrypt ciphertext | |
1393 | * @req: reference to the ablkcipher_request handle that holds all information | |
1394 | * needed to perform the cipher operation | |
1395 | * | |
1396 | * Decrypt ciphertext data using the aead_request handle. That data structure | |
1397 | * and how it is filled with data is discussed with the aead_request_* | |
1398 | * functions. | |
1399 | * | |
1400 | * IMPORTANT NOTE The caller must concatenate the ciphertext followed by the | |
1401 | * authentication data / tag. That authentication data / tag | |
1402 | * must have the size defined by the crypto_aead_setauthsize | |
1403 | * invocation. | |
1404 | * | |
1405 | * | |
1406 | * Return: 0 if the cipher operation was successful; -EBADMSG: The AEAD | |
1407 | * cipher operation performs the authentication of the data during the | |
1408 | * decryption operation. Therefore, the function returns this error if | |
1409 | * the authentication of the ciphertext was unsuccessful (i.e. the | |
1410 | * integrity of the ciphertext or the associated data was violated); | |
1411 | * < 0 if an error occurred. | |
1412 | */ | |
1ae97820 HX |
1413 | static inline int crypto_aead_decrypt(struct aead_request *req) |
1414 | { | |
1415 | return crypto_aead_crt(crypto_aead_reqtfm(req))->decrypt(req); | |
1416 | } | |
1417 | ||
fced7b02 SM |
1418 | /** |
1419 | * DOC: Asynchronous AEAD Request Handle | |
1420 | * | |
1421 | * The aead_request data structure contains all pointers to data required for | |
1422 | * the AEAD cipher operation. This includes the cipher handle (which can be | |
1423 | * used by multiple aead_request instances), pointer to plaintext and | |
1424 | * ciphertext, asynchronous callback function, etc. It acts as a handle to the | |
1425 | * aead_request_* API calls in a similar way as AEAD handle to the | |
1426 | * crypto_aead_* API calls. | |
1427 | */ | |
1428 | ||
1429 | /** | |
1430 | * crypto_aead_reqsize() - obtain size of the request data structure | |
1431 | * @tfm: cipher handle | |
1432 | * | |
1433 | * Return: number of bytes | |
1434 | */ | |
b16c3a2e | 1435 | static inline unsigned int crypto_aead_reqsize(struct crypto_aead *tfm) |
1ae97820 HX |
1436 | { |
1437 | return crypto_aead_crt(tfm)->reqsize; | |
1438 | } | |
1439 | ||
fced7b02 SM |
1440 | /** |
1441 | * aead_request_set_tfm() - update cipher handle reference in request | |
1442 | * @req: request handle to be modified | |
1443 | * @tfm: cipher handle that shall be added to the request handle | |
1444 | * | |
1445 | * Allow the caller to replace the existing aead handle in the request | |
1446 | * data structure with a different one. | |
1447 | */ | |
1ae97820 HX |
1448 | static inline void aead_request_set_tfm(struct aead_request *req, |
1449 | struct crypto_aead *tfm) | |
1450 | { | |
5b6d2d7f | 1451 | req->base.tfm = crypto_aead_tfm(crypto_aead_crt(tfm)->base); |
1ae97820 HX |
1452 | } |
1453 | ||
fced7b02 SM |
1454 | /** |
1455 | * aead_request_alloc() - allocate request data structure | |
1456 | * @tfm: cipher handle to be registered with the request | |
1457 | * @gfp: memory allocation flag that is handed to kmalloc by the API call. | |
1458 | * | |
1459 | * Allocate the request data structure that must be used with the AEAD | |
1460 | * encrypt and decrypt API calls. During the allocation, the provided aead | |
1461 | * handle is registered in the request data structure. | |
1462 | * | |
1463 | * Return: allocated request handle in case of success; IS_ERR() is true in case | |
1464 | * of an error, PTR_ERR() returns the error code. | |
1465 | */ | |
1ae97820 HX |
1466 | static inline struct aead_request *aead_request_alloc(struct crypto_aead *tfm, |
1467 | gfp_t gfp) | |
1468 | { | |
1469 | struct aead_request *req; | |
1470 | ||
1471 | req = kmalloc(sizeof(*req) + crypto_aead_reqsize(tfm), gfp); | |
1472 | ||
1473 | if (likely(req)) | |
1474 | aead_request_set_tfm(req, tfm); | |
1475 | ||
1476 | return req; | |
1477 | } | |
1478 | ||
fced7b02 SM |
1479 | /** |
1480 | * aead_request_free() - zeroize and free request data structure | |
1481 | * @req: request data structure cipher handle to be freed | |
1482 | */ | |
1ae97820 HX |
1483 | static inline void aead_request_free(struct aead_request *req) |
1484 | { | |
aef73cfc | 1485 | kzfree(req); |
1ae97820 HX |
1486 | } |
1487 | ||
fced7b02 SM |
1488 | /** |
1489 | * aead_request_set_callback() - set asynchronous callback function | |
1490 | * @req: request handle | |
1491 | * @flags: specify zero or an ORing of the flags | |
1492 | * CRYPTO_TFM_REQ_MAY_BACKLOG the request queue may back log and | |
1493 | * increase the wait queue beyond the initial maximum size; | |
1494 | * CRYPTO_TFM_REQ_MAY_SLEEP the request processing may sleep | |
1495 | * @compl: callback function pointer to be registered with the request handle | |
1496 | * @data: The data pointer refers to memory that is not used by the kernel | |
1497 | * crypto API, but provided to the callback function for it to use. Here, | |
1498 | * the caller can provide a reference to memory the callback function can | |
1499 | * operate on. As the callback function is invoked asynchronously to the | |
1500 | * related functionality, it may need to access data structures of the | |
1501 | * related functionality which can be referenced using this pointer. The | |
1502 | * callback function can access the memory via the "data" field in the | |
1503 | * crypto_async_request data structure provided to the callback function. | |
1504 | * | |
1505 | * Setting the callback function that is triggered once the cipher operation | |
1506 | * completes | |
1507 | * | |
1508 | * The callback function is registered with the aead_request handle and | |
1509 | * must comply with the following template: | |
1510 | * | |
1511 | * void callback_function(struct crypto_async_request *req, int error) | |
1512 | */ | |
1ae97820 HX |
1513 | static inline void aead_request_set_callback(struct aead_request *req, |
1514 | u32 flags, | |
3e3dc25f | 1515 | crypto_completion_t compl, |
1ae97820 HX |
1516 | void *data) |
1517 | { | |
3e3dc25f | 1518 | req->base.complete = compl; |
1ae97820 HX |
1519 | req->base.data = data; |
1520 | req->base.flags = flags; | |
1521 | } | |
1522 | ||
fced7b02 SM |
1523 | /** |
1524 | * aead_request_set_crypt - set data buffers | |
1525 | * @req: request handle | |
1526 | * @src: source scatter / gather list | |
1527 | * @dst: destination scatter / gather list | |
1528 | * @cryptlen: number of bytes to process from @src | |
1529 | * @iv: IV for the cipher operation which must comply with the IV size defined | |
1530 | * by crypto_aead_ivsize() | |
1531 | * | |
1532 | * Setting the source data and destination data scatter / gather lists. | |
1533 | * | |
1534 | * For encryption, the source is treated as the plaintext and the | |
1535 | * destination is the ciphertext. For a decryption operation, the use is | |
1536 | * reversed: the source is the ciphertext and the destination is the plaintext. | |
1537 | * | |
1538 | * IMPORTANT NOTE AEAD requires an authentication tag (MAC). For decryption, | |
1539 | * the caller must concatenate the ciphertext followed by the | |
1540 | * authentication tag and provide the entire data stream to the | |
1541 | * decryption operation (i.e. the data length used for the | |
1542 | * initialization of the scatterlist and the data length for the | |
1543 | * decryption operation is identical). For encryption, however, | |
1544 | * the authentication tag is created while encrypting the data. | |
1545 | * The destination buffer must hold sufficient space for the | |
1546 | * ciphertext and the authentication tag while the encryption | |
1547 | * invocation must only point to the plaintext data size. The | |
1548 | * following code snippet illustrates the memory usage | |
1549 | * buffer = kmalloc(ptbuflen + (enc ? authsize : 0)); | |
1550 | * sg_init_one(&sg, buffer, ptbuflen + (enc ? authsize : 0)); | |
1551 | * aead_request_set_crypt(req, &sg, &sg, ptbuflen, iv); | |
1552 | */ | |
1ae97820 HX |
1553 | static inline void aead_request_set_crypt(struct aead_request *req, |
1554 | struct scatterlist *src, | |
1555 | struct scatterlist *dst, | |
1556 | unsigned int cryptlen, u8 *iv) | |
1557 | { | |
1558 | req->src = src; | |
1559 | req->dst = dst; | |
1560 | req->cryptlen = cryptlen; | |
1561 | req->iv = iv; | |
1562 | } | |
1563 | ||
fced7b02 SM |
1564 | /** |
1565 | * aead_request_set_assoc() - set the associated data scatter / gather list | |
1566 | * @req: request handle | |
1567 | * @assoc: associated data scatter / gather list | |
1568 | * @assoclen: number of bytes to process from @assoc | |
1569 | * | |
1570 | * For encryption, the memory is filled with the associated data. For | |
1571 | * decryption, the memory must point to the associated data. | |
1572 | */ | |
1ae97820 HX |
1573 | static inline void aead_request_set_assoc(struct aead_request *req, |
1574 | struct scatterlist *assoc, | |
1575 | unsigned int assoclen) | |
1576 | { | |
1577 | req->assoc = assoc; | |
1578 | req->assoclen = assoclen; | |
1579 | } | |
1580 | ||
58284f0d SM |
1581 | /** |
1582 | * DOC: Synchronous Block Cipher API | |
1583 | * | |
1584 | * The synchronous block cipher API is used with the ciphers of type | |
1585 | * CRYPTO_ALG_TYPE_BLKCIPHER (listed as type "blkcipher" in /proc/crypto) | |
1586 | * | |
1587 | * Synchronous calls, have a context in the tfm. But since a single tfm can be | |
1588 | * used in multiple calls and in parallel, this info should not be changeable | |
1589 | * (unless a lock is used). This applies, for example, to the symmetric key. | |
1590 | * However, the IV is changeable, so there is an iv field in blkcipher_tfm | |
1591 | * structure for synchronous blkcipher api. So, its the only state info that can | |
1592 | * be kept for synchronous calls without using a big lock across a tfm. | |
1593 | * | |
1594 | * The block cipher API allows the use of a complete cipher, i.e. a cipher | |
1595 | * consisting of a template (a block chaining mode) and a single block cipher | |
1596 | * primitive (e.g. AES). | |
1597 | * | |
1598 | * The plaintext data buffer and the ciphertext data buffer are pointed to | |
1599 | * by using scatter/gather lists. The cipher operation is performed | |
1600 | * on all segments of the provided scatter/gather lists. | |
1601 | * | |
1602 | * The kernel crypto API supports a cipher operation "in-place" which means that | |
1603 | * the caller may provide the same scatter/gather list for the plaintext and | |
1604 | * cipher text. After the completion of the cipher operation, the plaintext | |
1605 | * data is replaced with the ciphertext data in case of an encryption and vice | |
1606 | * versa for a decryption. The caller must ensure that the scatter/gather lists | |
1607 | * for the output data point to sufficiently large buffers, i.e. multiples of | |
1608 | * the block size of the cipher. | |
1609 | */ | |
1610 | ||
5cde0af2 HX |
1611 | static inline struct crypto_blkcipher *__crypto_blkcipher_cast( |
1612 | struct crypto_tfm *tfm) | |
1613 | { | |
1614 | return (struct crypto_blkcipher *)tfm; | |
1615 | } | |
1616 | ||
1617 | static inline struct crypto_blkcipher *crypto_blkcipher_cast( | |
1618 | struct crypto_tfm *tfm) | |
1619 | { | |
1620 | BUG_ON(crypto_tfm_alg_type(tfm) != CRYPTO_ALG_TYPE_BLKCIPHER); | |
1621 | return __crypto_blkcipher_cast(tfm); | |
1622 | } | |
1623 | ||
58284f0d SM |
1624 | /** |
1625 | * crypto_alloc_blkcipher() - allocate synchronous block cipher handle | |
1626 | * @alg_name: is the cra_name / name or cra_driver_name / driver name of the | |
1627 | * blkcipher cipher | |
1628 | * @type: specifies the type of the cipher | |
1629 | * @mask: specifies the mask for the cipher | |
1630 | * | |
1631 | * Allocate a cipher handle for a block cipher. The returned struct | |
1632 | * crypto_blkcipher is the cipher handle that is required for any subsequent | |
1633 | * API invocation for that block cipher. | |
1634 | * | |
1635 | * Return: allocated cipher handle in case of success; IS_ERR() is true in case | |
1636 | * of an error, PTR_ERR() returns the error code. | |
1637 | */ | |
5cde0af2 HX |
1638 | static inline struct crypto_blkcipher *crypto_alloc_blkcipher( |
1639 | const char *alg_name, u32 type, u32 mask) | |
1640 | { | |
332f8840 | 1641 | type &= ~CRYPTO_ALG_TYPE_MASK; |
5cde0af2 | 1642 | type |= CRYPTO_ALG_TYPE_BLKCIPHER; |
332f8840 | 1643 | mask |= CRYPTO_ALG_TYPE_MASK; |
5cde0af2 HX |
1644 | |
1645 | return __crypto_blkcipher_cast(crypto_alloc_base(alg_name, type, mask)); | |
1646 | } | |
1647 | ||
1648 | static inline struct crypto_tfm *crypto_blkcipher_tfm( | |
1649 | struct crypto_blkcipher *tfm) | |
1650 | { | |
1651 | return &tfm->base; | |
1652 | } | |
1653 | ||
58284f0d SM |
1654 | /** |
1655 | * crypto_free_blkcipher() - zeroize and free the block cipher handle | |
1656 | * @tfm: cipher handle to be freed | |
1657 | */ | |
5cde0af2 HX |
1658 | static inline void crypto_free_blkcipher(struct crypto_blkcipher *tfm) |
1659 | { | |
1660 | crypto_free_tfm(crypto_blkcipher_tfm(tfm)); | |
1661 | } | |
1662 | ||
58284f0d SM |
1663 | /** |
1664 | * crypto_has_blkcipher() - Search for the availability of a block cipher | |
1665 | * @alg_name: is the cra_name / name or cra_driver_name / driver name of the | |
1666 | * block cipher | |
1667 | * @type: specifies the type of the cipher | |
1668 | * @mask: specifies the mask for the cipher | |
1669 | * | |
1670 | * Return: true when the block cipher is known to the kernel crypto API; false | |
1671 | * otherwise | |
1672 | */ | |
fce32d70 HX |
1673 | static inline int crypto_has_blkcipher(const char *alg_name, u32 type, u32 mask) |
1674 | { | |
332f8840 | 1675 | type &= ~CRYPTO_ALG_TYPE_MASK; |
fce32d70 | 1676 | type |= CRYPTO_ALG_TYPE_BLKCIPHER; |
332f8840 | 1677 | mask |= CRYPTO_ALG_TYPE_MASK; |
fce32d70 HX |
1678 | |
1679 | return crypto_has_alg(alg_name, type, mask); | |
1680 | } | |
1681 | ||
58284f0d SM |
1682 | /** |
1683 | * crypto_blkcipher_name() - return the name / cra_name from the cipher handle | |
1684 | * @tfm: cipher handle | |
1685 | * | |
1686 | * Return: The character string holding the name of the cipher | |
1687 | */ | |
5cde0af2 HX |
1688 | static inline const char *crypto_blkcipher_name(struct crypto_blkcipher *tfm) |
1689 | { | |
1690 | return crypto_tfm_alg_name(crypto_blkcipher_tfm(tfm)); | |
1691 | } | |
1692 | ||
1693 | static inline struct blkcipher_tfm *crypto_blkcipher_crt( | |
1694 | struct crypto_blkcipher *tfm) | |
1695 | { | |
1696 | return &crypto_blkcipher_tfm(tfm)->crt_blkcipher; | |
1697 | } | |
1698 | ||
1699 | static inline struct blkcipher_alg *crypto_blkcipher_alg( | |
1700 | struct crypto_blkcipher *tfm) | |
1701 | { | |
1702 | return &crypto_blkcipher_tfm(tfm)->__crt_alg->cra_blkcipher; | |
1703 | } | |
1704 | ||
58284f0d SM |
1705 | /** |
1706 | * crypto_blkcipher_ivsize() - obtain IV size | |
1707 | * @tfm: cipher handle | |
1708 | * | |
1709 | * The size of the IV for the block cipher referenced by the cipher handle is | |
1710 | * returned. This IV size may be zero if the cipher does not need an IV. | |
1711 | * | |
1712 | * Return: IV size in bytes | |
1713 | */ | |
5cde0af2 HX |
1714 | static inline unsigned int crypto_blkcipher_ivsize(struct crypto_blkcipher *tfm) |
1715 | { | |
1716 | return crypto_blkcipher_alg(tfm)->ivsize; | |
1717 | } | |
1718 | ||
58284f0d SM |
1719 | /** |
1720 | * crypto_blkcipher_blocksize() - obtain block size of cipher | |
1721 | * @tfm: cipher handle | |
1722 | * | |
1723 | * The block size for the block cipher referenced with the cipher handle is | |
1724 | * returned. The caller may use that information to allocate appropriate | |
1725 | * memory for the data returned by the encryption or decryption operation. | |
1726 | * | |
1727 | * Return: block size of cipher | |
1728 | */ | |
5cde0af2 HX |
1729 | static inline unsigned int crypto_blkcipher_blocksize( |
1730 | struct crypto_blkcipher *tfm) | |
1731 | { | |
1732 | return crypto_tfm_alg_blocksize(crypto_blkcipher_tfm(tfm)); | |
1733 | } | |
1734 | ||
1735 | static inline unsigned int crypto_blkcipher_alignmask( | |
1736 | struct crypto_blkcipher *tfm) | |
1737 | { | |
1738 | return crypto_tfm_alg_alignmask(crypto_blkcipher_tfm(tfm)); | |
1739 | } | |
1740 | ||
1741 | static inline u32 crypto_blkcipher_get_flags(struct crypto_blkcipher *tfm) | |
1742 | { | |
1743 | return crypto_tfm_get_flags(crypto_blkcipher_tfm(tfm)); | |
1744 | } | |
1745 | ||
1746 | static inline void crypto_blkcipher_set_flags(struct crypto_blkcipher *tfm, | |
1747 | u32 flags) | |
1748 | { | |
1749 | crypto_tfm_set_flags(crypto_blkcipher_tfm(tfm), flags); | |
1750 | } | |
1751 | ||
1752 | static inline void crypto_blkcipher_clear_flags(struct crypto_blkcipher *tfm, | |
1753 | u32 flags) | |
1754 | { | |
1755 | crypto_tfm_clear_flags(crypto_blkcipher_tfm(tfm), flags); | |
1756 | } | |
1757 | ||
58284f0d SM |
1758 | /** |
1759 | * crypto_blkcipher_setkey() - set key for cipher | |
1760 | * @tfm: cipher handle | |
1761 | * @key: buffer holding the key | |
1762 | * @keylen: length of the key in bytes | |
1763 | * | |
1764 | * The caller provided key is set for the block cipher referenced by the cipher | |
1765 | * handle. | |
1766 | * | |
1767 | * Note, the key length determines the cipher type. Many block ciphers implement | |
1768 | * different cipher modes depending on the key size, such as AES-128 vs AES-192 | |
1769 | * vs. AES-256. When providing a 16 byte key for an AES cipher handle, AES-128 | |
1770 | * is performed. | |
1771 | * | |
1772 | * Return: 0 if the setting of the key was successful; < 0 if an error occurred | |
1773 | */ | |
5cde0af2 HX |
1774 | static inline int crypto_blkcipher_setkey(struct crypto_blkcipher *tfm, |
1775 | const u8 *key, unsigned int keylen) | |
1776 | { | |
1777 | return crypto_blkcipher_crt(tfm)->setkey(crypto_blkcipher_tfm(tfm), | |
1778 | key, keylen); | |
1779 | } | |
1780 | ||
58284f0d SM |
1781 | /** |
1782 | * crypto_blkcipher_encrypt() - encrypt plaintext | |
1783 | * @desc: reference to the block cipher handle with meta data | |
1784 | * @dst: scatter/gather list that is filled by the cipher operation with the | |
1785 | * ciphertext | |
1786 | * @src: scatter/gather list that holds the plaintext | |
1787 | * @nbytes: number of bytes of the plaintext to encrypt. | |
1788 | * | |
1789 | * Encrypt plaintext data using the IV set by the caller with a preceding | |
1790 | * call of crypto_blkcipher_set_iv. | |
1791 | * | |
1792 | * The blkcipher_desc data structure must be filled by the caller and can | |
1793 | * reside on the stack. The caller must fill desc as follows: desc.tfm is filled | |
1794 | * with the block cipher handle; desc.flags is filled with either | |
1795 | * CRYPTO_TFM_REQ_MAY_SLEEP or 0. | |
1796 | * | |
1797 | * Return: 0 if the cipher operation was successful; < 0 if an error occurred | |
1798 | */ | |
5cde0af2 HX |
1799 | static inline int crypto_blkcipher_encrypt(struct blkcipher_desc *desc, |
1800 | struct scatterlist *dst, | |
1801 | struct scatterlist *src, | |
1802 | unsigned int nbytes) | |
1803 | { | |
1804 | desc->info = crypto_blkcipher_crt(desc->tfm)->iv; | |
1805 | return crypto_blkcipher_crt(desc->tfm)->encrypt(desc, dst, src, nbytes); | |
1806 | } | |
1807 | ||
58284f0d SM |
1808 | /** |
1809 | * crypto_blkcipher_encrypt_iv() - encrypt plaintext with dedicated IV | |
1810 | * @desc: reference to the block cipher handle with meta data | |
1811 | * @dst: scatter/gather list that is filled by the cipher operation with the | |
1812 | * ciphertext | |
1813 | * @src: scatter/gather list that holds the plaintext | |
1814 | * @nbytes: number of bytes of the plaintext to encrypt. | |
1815 | * | |
1816 | * Encrypt plaintext data with the use of an IV that is solely used for this | |
1817 | * cipher operation. Any previously set IV is not used. | |
1818 | * | |
1819 | * The blkcipher_desc data structure must be filled by the caller and can | |
1820 | * reside on the stack. The caller must fill desc as follows: desc.tfm is filled | |
1821 | * with the block cipher handle; desc.info is filled with the IV to be used for | |
1822 | * the current operation; desc.flags is filled with either | |
1823 | * CRYPTO_TFM_REQ_MAY_SLEEP or 0. | |
1824 | * | |
1825 | * Return: 0 if the cipher operation was successful; < 0 if an error occurred | |
1826 | */ | |
5cde0af2 HX |
1827 | static inline int crypto_blkcipher_encrypt_iv(struct blkcipher_desc *desc, |
1828 | struct scatterlist *dst, | |
1829 | struct scatterlist *src, | |
1830 | unsigned int nbytes) | |
1831 | { | |
1832 | return crypto_blkcipher_crt(desc->tfm)->encrypt(desc, dst, src, nbytes); | |
1833 | } | |
1834 | ||
58284f0d SM |
1835 | /** |
1836 | * crypto_blkcipher_decrypt() - decrypt ciphertext | |
1837 | * @desc: reference to the block cipher handle with meta data | |
1838 | * @dst: scatter/gather list that is filled by the cipher operation with the | |
1839 | * plaintext | |
1840 | * @src: scatter/gather list that holds the ciphertext | |
1841 | * @nbytes: number of bytes of the ciphertext to decrypt. | |
1842 | * | |
1843 | * Decrypt ciphertext data using the IV set by the caller with a preceding | |
1844 | * call of crypto_blkcipher_set_iv. | |
1845 | * | |
1846 | * The blkcipher_desc data structure must be filled by the caller as documented | |
1847 | * for the crypto_blkcipher_encrypt call above. | |
1848 | * | |
1849 | * Return: 0 if the cipher operation was successful; < 0 if an error occurred | |
1850 | * | |
1851 | */ | |
5cde0af2 HX |
1852 | static inline int crypto_blkcipher_decrypt(struct blkcipher_desc *desc, |
1853 | struct scatterlist *dst, | |
1854 | struct scatterlist *src, | |
1855 | unsigned int nbytes) | |
1856 | { | |
1857 | desc->info = crypto_blkcipher_crt(desc->tfm)->iv; | |
1858 | return crypto_blkcipher_crt(desc->tfm)->decrypt(desc, dst, src, nbytes); | |
1859 | } | |
1860 | ||
58284f0d SM |
1861 | /** |
1862 | * crypto_blkcipher_decrypt_iv() - decrypt ciphertext with dedicated IV | |
1863 | * @desc: reference to the block cipher handle with meta data | |
1864 | * @dst: scatter/gather list that is filled by the cipher operation with the | |
1865 | * plaintext | |
1866 | * @src: scatter/gather list that holds the ciphertext | |
1867 | * @nbytes: number of bytes of the ciphertext to decrypt. | |
1868 | * | |
1869 | * Decrypt ciphertext data with the use of an IV that is solely used for this | |
1870 | * cipher operation. Any previously set IV is not used. | |
1871 | * | |
1872 | * The blkcipher_desc data structure must be filled by the caller as documented | |
1873 | * for the crypto_blkcipher_encrypt_iv call above. | |
1874 | * | |
1875 | * Return: 0 if the cipher operation was successful; < 0 if an error occurred | |
1876 | */ | |
5cde0af2 HX |
1877 | static inline int crypto_blkcipher_decrypt_iv(struct blkcipher_desc *desc, |
1878 | struct scatterlist *dst, | |
1879 | struct scatterlist *src, | |
1880 | unsigned int nbytes) | |
1881 | { | |
1882 | return crypto_blkcipher_crt(desc->tfm)->decrypt(desc, dst, src, nbytes); | |
1883 | } | |
1884 | ||
58284f0d SM |
1885 | /** |
1886 | * crypto_blkcipher_set_iv() - set IV for cipher | |
1887 | * @tfm: cipher handle | |
1888 | * @src: buffer holding the IV | |
1889 | * @len: length of the IV in bytes | |
1890 | * | |
1891 | * The caller provided IV is set for the block cipher referenced by the cipher | |
1892 | * handle. | |
1893 | */ | |
5cde0af2 HX |
1894 | static inline void crypto_blkcipher_set_iv(struct crypto_blkcipher *tfm, |
1895 | const u8 *src, unsigned int len) | |
1896 | { | |
1897 | memcpy(crypto_blkcipher_crt(tfm)->iv, src, len); | |
1898 | } | |
1899 | ||
58284f0d SM |
1900 | /** |
1901 | * crypto_blkcipher_get_iv() - obtain IV from cipher | |
1902 | * @tfm: cipher handle | |
1903 | * @dst: buffer filled with the IV | |
1904 | * @len: length of the buffer dst | |
1905 | * | |
1906 | * The caller can obtain the IV set for the block cipher referenced by the | |
1907 | * cipher handle and store it into the user-provided buffer. If the buffer | |
1908 | * has an insufficient space, the IV is truncated to fit the buffer. | |
1909 | */ | |
5cde0af2 HX |
1910 | static inline void crypto_blkcipher_get_iv(struct crypto_blkcipher *tfm, |
1911 | u8 *dst, unsigned int len) | |
1912 | { | |
1913 | memcpy(dst, crypto_blkcipher_crt(tfm)->iv, len); | |
1914 | } | |
1915 | ||
16e61030 SM |
1916 | /** |
1917 | * DOC: Single Block Cipher API | |
1918 | * | |
1919 | * The single block cipher API is used with the ciphers of type | |
1920 | * CRYPTO_ALG_TYPE_CIPHER (listed as type "cipher" in /proc/crypto). | |
1921 | * | |
1922 | * Using the single block cipher API calls, operations with the basic cipher | |
1923 | * primitive can be implemented. These cipher primitives exclude any block | |
1924 | * chaining operations including IV handling. | |
1925 | * | |
1926 | * The purpose of this single block cipher API is to support the implementation | |
1927 | * of templates or other concepts that only need to perform the cipher operation | |
1928 | * on one block at a time. Templates invoke the underlying cipher primitive | |
1929 | * block-wise and process either the input or the output data of these cipher | |
1930 | * operations. | |
1931 | */ | |
1932 | ||
f28776a3 HX |
1933 | static inline struct crypto_cipher *__crypto_cipher_cast(struct crypto_tfm *tfm) |
1934 | { | |
1935 | return (struct crypto_cipher *)tfm; | |
1936 | } | |
1937 | ||
1938 | static inline struct crypto_cipher *crypto_cipher_cast(struct crypto_tfm *tfm) | |
1939 | { | |
1940 | BUG_ON(crypto_tfm_alg_type(tfm) != CRYPTO_ALG_TYPE_CIPHER); | |
1941 | return __crypto_cipher_cast(tfm); | |
1942 | } | |
1943 | ||
16e61030 SM |
1944 | /** |
1945 | * crypto_alloc_cipher() - allocate single block cipher handle | |
1946 | * @alg_name: is the cra_name / name or cra_driver_name / driver name of the | |
1947 | * single block cipher | |
1948 | * @type: specifies the type of the cipher | |
1949 | * @mask: specifies the mask for the cipher | |
1950 | * | |
1951 | * Allocate a cipher handle for a single block cipher. The returned struct | |
1952 | * crypto_cipher is the cipher handle that is required for any subsequent API | |
1953 | * invocation for that single block cipher. | |
1954 | * | |
1955 | * Return: allocated cipher handle in case of success; IS_ERR() is true in case | |
1956 | * of an error, PTR_ERR() returns the error code. | |
1957 | */ | |
f28776a3 HX |
1958 | static inline struct crypto_cipher *crypto_alloc_cipher(const char *alg_name, |
1959 | u32 type, u32 mask) | |
1960 | { | |
1961 | type &= ~CRYPTO_ALG_TYPE_MASK; | |
1962 | type |= CRYPTO_ALG_TYPE_CIPHER; | |
1963 | mask |= CRYPTO_ALG_TYPE_MASK; | |
1964 | ||
1965 | return __crypto_cipher_cast(crypto_alloc_base(alg_name, type, mask)); | |
1966 | } | |
1967 | ||
1968 | static inline struct crypto_tfm *crypto_cipher_tfm(struct crypto_cipher *tfm) | |
1969 | { | |
78a1fe4f | 1970 | return &tfm->base; |
f28776a3 HX |
1971 | } |
1972 | ||
16e61030 SM |
1973 | /** |
1974 | * crypto_free_cipher() - zeroize and free the single block cipher handle | |
1975 | * @tfm: cipher handle to be freed | |
1976 | */ | |
f28776a3 HX |
1977 | static inline void crypto_free_cipher(struct crypto_cipher *tfm) |
1978 | { | |
1979 | crypto_free_tfm(crypto_cipher_tfm(tfm)); | |
1980 | } | |
1981 | ||
16e61030 SM |
1982 | /** |
1983 | * crypto_has_cipher() - Search for the availability of a single block cipher | |
1984 | * @alg_name: is the cra_name / name or cra_driver_name / driver name of the | |
1985 | * single block cipher | |
1986 | * @type: specifies the type of the cipher | |
1987 | * @mask: specifies the mask for the cipher | |
1988 | * | |
1989 | * Return: true when the single block cipher is known to the kernel crypto API; | |
1990 | * false otherwise | |
1991 | */ | |
fce32d70 HX |
1992 | static inline int crypto_has_cipher(const char *alg_name, u32 type, u32 mask) |
1993 | { | |
1994 | type &= ~CRYPTO_ALG_TYPE_MASK; | |
1995 | type |= CRYPTO_ALG_TYPE_CIPHER; | |
1996 | mask |= CRYPTO_ALG_TYPE_MASK; | |
1997 | ||
1998 | return crypto_has_alg(alg_name, type, mask); | |
1999 | } | |
2000 | ||
f28776a3 HX |
2001 | static inline struct cipher_tfm *crypto_cipher_crt(struct crypto_cipher *tfm) |
2002 | { | |
2003 | return &crypto_cipher_tfm(tfm)->crt_cipher; | |
2004 | } | |
2005 | ||
16e61030 SM |
2006 | /** |
2007 | * crypto_cipher_blocksize() - obtain block size for cipher | |
2008 | * @tfm: cipher handle | |
2009 | * | |
2010 | * The block size for the single block cipher referenced with the cipher handle | |
2011 | * tfm is returned. The caller may use that information to allocate appropriate | |
2012 | * memory for the data returned by the encryption or decryption operation | |
2013 | * | |
2014 | * Return: block size of cipher | |
2015 | */ | |
f28776a3 HX |
2016 | static inline unsigned int crypto_cipher_blocksize(struct crypto_cipher *tfm) |
2017 | { | |
2018 | return crypto_tfm_alg_blocksize(crypto_cipher_tfm(tfm)); | |
2019 | } | |
2020 | ||
2021 | static inline unsigned int crypto_cipher_alignmask(struct crypto_cipher *tfm) | |
2022 | { | |
2023 | return crypto_tfm_alg_alignmask(crypto_cipher_tfm(tfm)); | |
2024 | } | |
2025 | ||
2026 | static inline u32 crypto_cipher_get_flags(struct crypto_cipher *tfm) | |
2027 | { | |
2028 | return crypto_tfm_get_flags(crypto_cipher_tfm(tfm)); | |
2029 | } | |
2030 | ||
2031 | static inline void crypto_cipher_set_flags(struct crypto_cipher *tfm, | |
2032 | u32 flags) | |
2033 | { | |
2034 | crypto_tfm_set_flags(crypto_cipher_tfm(tfm), flags); | |
2035 | } | |
2036 | ||
2037 | static inline void crypto_cipher_clear_flags(struct crypto_cipher *tfm, | |
2038 | u32 flags) | |
2039 | { | |
2040 | crypto_tfm_clear_flags(crypto_cipher_tfm(tfm), flags); | |
2041 | } | |
2042 | ||
16e61030 SM |
2043 | /** |
2044 | * crypto_cipher_setkey() - set key for cipher | |
2045 | * @tfm: cipher handle | |
2046 | * @key: buffer holding the key | |
2047 | * @keylen: length of the key in bytes | |
2048 | * | |
2049 | * The caller provided key is set for the single block cipher referenced by the | |
2050 | * cipher handle. | |
2051 | * | |
2052 | * Note, the key length determines the cipher type. Many block ciphers implement | |
2053 | * different cipher modes depending on the key size, such as AES-128 vs AES-192 | |
2054 | * vs. AES-256. When providing a 16 byte key for an AES cipher handle, AES-128 | |
2055 | * is performed. | |
2056 | * | |
2057 | * Return: 0 if the setting of the key was successful; < 0 if an error occurred | |
2058 | */ | |
7226bc87 HX |
2059 | static inline int crypto_cipher_setkey(struct crypto_cipher *tfm, |
2060 | const u8 *key, unsigned int keylen) | |
2061 | { | |
2062 | return crypto_cipher_crt(tfm)->cit_setkey(crypto_cipher_tfm(tfm), | |
2063 | key, keylen); | |
2064 | } | |
2065 | ||
16e61030 SM |
2066 | /** |
2067 | * crypto_cipher_encrypt_one() - encrypt one block of plaintext | |
2068 | * @tfm: cipher handle | |
2069 | * @dst: points to the buffer that will be filled with the ciphertext | |
2070 | * @src: buffer holding the plaintext to be encrypted | |
2071 | * | |
2072 | * Invoke the encryption operation of one block. The caller must ensure that | |
2073 | * the plaintext and ciphertext buffers are at least one block in size. | |
2074 | */ | |
f28776a3 HX |
2075 | static inline void crypto_cipher_encrypt_one(struct crypto_cipher *tfm, |
2076 | u8 *dst, const u8 *src) | |
2077 | { | |
2078 | crypto_cipher_crt(tfm)->cit_encrypt_one(crypto_cipher_tfm(tfm), | |
2079 | dst, src); | |
2080 | } | |
2081 | ||
16e61030 SM |
2082 | /** |
2083 | * crypto_cipher_decrypt_one() - decrypt one block of ciphertext | |
2084 | * @tfm: cipher handle | |
2085 | * @dst: points to the buffer that will be filled with the plaintext | |
2086 | * @src: buffer holding the ciphertext to be decrypted | |
2087 | * | |
2088 | * Invoke the decryption operation of one block. The caller must ensure that | |
2089 | * the plaintext and ciphertext buffers are at least one block in size. | |
2090 | */ | |
f28776a3 HX |
2091 | static inline void crypto_cipher_decrypt_one(struct crypto_cipher *tfm, |
2092 | u8 *dst, const u8 *src) | |
2093 | { | |
2094 | crypto_cipher_crt(tfm)->cit_decrypt_one(crypto_cipher_tfm(tfm), | |
2095 | dst, src); | |
2096 | } | |
2097 | ||
47ca5be9 SM |
2098 | /** |
2099 | * DOC: Synchronous Message Digest API | |
2100 | * | |
2101 | * The synchronous message digest API is used with the ciphers of type | |
2102 | * CRYPTO_ALG_TYPE_HASH (listed as type "hash" in /proc/crypto) | |
2103 | */ | |
2104 | ||
055bcee3 | 2105 | static inline struct crypto_hash *__crypto_hash_cast(struct crypto_tfm *tfm) |
1da177e4 | 2106 | { |
055bcee3 | 2107 | return (struct crypto_hash *)tfm; |
1da177e4 LT |
2108 | } |
2109 | ||
055bcee3 | 2110 | static inline struct crypto_hash *crypto_hash_cast(struct crypto_tfm *tfm) |
1da177e4 | 2111 | { |
055bcee3 HX |
2112 | BUG_ON((crypto_tfm_alg_type(tfm) ^ CRYPTO_ALG_TYPE_HASH) & |
2113 | CRYPTO_ALG_TYPE_HASH_MASK); | |
2114 | return __crypto_hash_cast(tfm); | |
1da177e4 LT |
2115 | } |
2116 | ||
47ca5be9 SM |
2117 | /** |
2118 | * crypto_alloc_hash() - allocate synchronous message digest handle | |
2119 | * @alg_name: is the cra_name / name or cra_driver_name / driver name of the | |
2120 | * message digest cipher | |
2121 | * @type: specifies the type of the cipher | |
2122 | * @mask: specifies the mask for the cipher | |
2123 | * | |
2124 | * Allocate a cipher handle for a message digest. The returned struct | |
2125 | * crypto_hash is the cipher handle that is required for any subsequent | |
2126 | * API invocation for that message digest. | |
2127 | * | |
2128 | * Return: allocated cipher handle in case of success; IS_ERR() is true in case | |
2129 | * of an error, PTR_ERR() returns the error code. | |
2130 | */ | |
055bcee3 HX |
2131 | static inline struct crypto_hash *crypto_alloc_hash(const char *alg_name, |
2132 | u32 type, u32 mask) | |
1da177e4 | 2133 | { |
055bcee3 | 2134 | type &= ~CRYPTO_ALG_TYPE_MASK; |
551a09a7 | 2135 | mask &= ~CRYPTO_ALG_TYPE_MASK; |
055bcee3 HX |
2136 | type |= CRYPTO_ALG_TYPE_HASH; |
2137 | mask |= CRYPTO_ALG_TYPE_HASH_MASK; | |
2138 | ||
2139 | return __crypto_hash_cast(crypto_alloc_base(alg_name, type, mask)); | |
1da177e4 LT |
2140 | } |
2141 | ||
055bcee3 | 2142 | static inline struct crypto_tfm *crypto_hash_tfm(struct crypto_hash *tfm) |
1da177e4 | 2143 | { |
055bcee3 HX |
2144 | return &tfm->base; |
2145 | } | |
2146 | ||
47ca5be9 SM |
2147 | /** |
2148 | * crypto_free_hash() - zeroize and free message digest handle | |
2149 | * @tfm: cipher handle to be freed | |
2150 | */ | |
055bcee3 HX |
2151 | static inline void crypto_free_hash(struct crypto_hash *tfm) |
2152 | { | |
2153 | crypto_free_tfm(crypto_hash_tfm(tfm)); | |
2154 | } | |
2155 | ||
47ca5be9 SM |
2156 | /** |
2157 | * crypto_has_hash() - Search for the availability of a message digest | |
2158 | * @alg_name: is the cra_name / name or cra_driver_name / driver name of the | |
2159 | * message digest cipher | |
2160 | * @type: specifies the type of the cipher | |
2161 | * @mask: specifies the mask for the cipher | |
2162 | * | |
2163 | * Return: true when the message digest cipher is known to the kernel crypto | |
2164 | * API; false otherwise | |
2165 | */ | |
fce32d70 HX |
2166 | static inline int crypto_has_hash(const char *alg_name, u32 type, u32 mask) |
2167 | { | |
2168 | type &= ~CRYPTO_ALG_TYPE_MASK; | |
551a09a7 | 2169 | mask &= ~CRYPTO_ALG_TYPE_MASK; |
fce32d70 HX |
2170 | type |= CRYPTO_ALG_TYPE_HASH; |
2171 | mask |= CRYPTO_ALG_TYPE_HASH_MASK; | |
2172 | ||
2173 | return crypto_has_alg(alg_name, type, mask); | |
2174 | } | |
2175 | ||
055bcee3 HX |
2176 | static inline struct hash_tfm *crypto_hash_crt(struct crypto_hash *tfm) |
2177 | { | |
2178 | return &crypto_hash_tfm(tfm)->crt_hash; | |
2179 | } | |
2180 | ||
47ca5be9 SM |
2181 | /** |
2182 | * crypto_hash_blocksize() - obtain block size for message digest | |
2183 | * @tfm: cipher handle | |
2184 | * | |
2185 | * The block size for the message digest cipher referenced with the cipher | |
2186 | * handle is returned. | |
2187 | * | |
2188 | * Return: block size of cipher | |
2189 | */ | |
055bcee3 HX |
2190 | static inline unsigned int crypto_hash_blocksize(struct crypto_hash *tfm) |
2191 | { | |
2192 | return crypto_tfm_alg_blocksize(crypto_hash_tfm(tfm)); | |
2193 | } | |
2194 | ||
2195 | static inline unsigned int crypto_hash_alignmask(struct crypto_hash *tfm) | |
2196 | { | |
2197 | return crypto_tfm_alg_alignmask(crypto_hash_tfm(tfm)); | |
2198 | } | |
2199 | ||
47ca5be9 SM |
2200 | /** |
2201 | * crypto_hash_digestsize() - obtain message digest size | |
2202 | * @tfm: cipher handle | |
2203 | * | |
2204 | * The size for the message digest created by the message digest cipher | |
2205 | * referenced with the cipher handle is returned. | |
2206 | * | |
2207 | * Return: message digest size | |
2208 | */ | |
055bcee3 HX |
2209 | static inline unsigned int crypto_hash_digestsize(struct crypto_hash *tfm) |
2210 | { | |
2211 | return crypto_hash_crt(tfm)->digestsize; | |
2212 | } | |
2213 | ||
2214 | static inline u32 crypto_hash_get_flags(struct crypto_hash *tfm) | |
2215 | { | |
2216 | return crypto_tfm_get_flags(crypto_hash_tfm(tfm)); | |
2217 | } | |
2218 | ||
2219 | static inline void crypto_hash_set_flags(struct crypto_hash *tfm, u32 flags) | |
2220 | { | |
2221 | crypto_tfm_set_flags(crypto_hash_tfm(tfm), flags); | |
2222 | } | |
2223 | ||
2224 | static inline void crypto_hash_clear_flags(struct crypto_hash *tfm, u32 flags) | |
2225 | { | |
2226 | crypto_tfm_clear_flags(crypto_hash_tfm(tfm), flags); | |
2227 | } | |
2228 | ||
47ca5be9 SM |
2229 | /** |
2230 | * crypto_hash_init() - (re)initialize message digest handle | |
2231 | * @desc: cipher request handle that to be filled by caller -- | |
2232 | * desc.tfm is filled with the hash cipher handle; | |
2233 | * desc.flags is filled with either CRYPTO_TFM_REQ_MAY_SLEEP or 0. | |
2234 | * | |
2235 | * The call (re-)initializes the message digest referenced by the hash cipher | |
2236 | * request handle. Any potentially existing state created by previous | |
2237 | * operations is discarded. | |
2238 | * | |
2239 | * Return: 0 if the message digest initialization was successful; < 0 if an | |
2240 | * error occurred | |
2241 | */ | |
055bcee3 HX |
2242 | static inline int crypto_hash_init(struct hash_desc *desc) |
2243 | { | |
2244 | return crypto_hash_crt(desc->tfm)->init(desc); | |
2245 | } | |
2246 | ||
47ca5be9 SM |
2247 | /** |
2248 | * crypto_hash_update() - add data to message digest for processing | |
2249 | * @desc: cipher request handle | |
2250 | * @sg: scatter / gather list pointing to the data to be added to the message | |
2251 | * digest | |
2252 | * @nbytes: number of bytes to be processed from @sg | |
2253 | * | |
2254 | * Updates the message digest state of the cipher handle pointed to by the | |
2255 | * hash cipher request handle with the input data pointed to by the | |
2256 | * scatter/gather list. | |
2257 | * | |
2258 | * Return: 0 if the message digest update was successful; < 0 if an error | |
2259 | * occurred | |
2260 | */ | |
055bcee3 HX |
2261 | static inline int crypto_hash_update(struct hash_desc *desc, |
2262 | struct scatterlist *sg, | |
2263 | unsigned int nbytes) | |
2264 | { | |
2265 | return crypto_hash_crt(desc->tfm)->update(desc, sg, nbytes); | |
2266 | } | |
2267 | ||
47ca5be9 SM |
2268 | /** |
2269 | * crypto_hash_final() - calculate message digest | |
2270 | * @desc: cipher request handle | |
2271 | * @out: message digest output buffer -- The caller must ensure that the out | |
2272 | * buffer has a sufficient size (e.g. by using the crypto_hash_digestsize | |
2273 | * function). | |
2274 | * | |
2275 | * Finalize the message digest operation and create the message digest | |
2276 | * based on all data added to the cipher handle. The message digest is placed | |
2277 | * into the output buffer. | |
2278 | * | |
2279 | * Return: 0 if the message digest creation was successful; < 0 if an error | |
2280 | * occurred | |
2281 | */ | |
055bcee3 HX |
2282 | static inline int crypto_hash_final(struct hash_desc *desc, u8 *out) |
2283 | { | |
2284 | return crypto_hash_crt(desc->tfm)->final(desc, out); | |
2285 | } | |
2286 | ||
47ca5be9 SM |
2287 | /** |
2288 | * crypto_hash_digest() - calculate message digest for a buffer | |
2289 | * @desc: see crypto_hash_final() | |
2290 | * @sg: see crypto_hash_update() | |
2291 | * @nbytes: see crypto_hash_update() | |
2292 | * @out: see crypto_hash_final() | |
2293 | * | |
2294 | * This function is a "short-hand" for the function calls of crypto_hash_init, | |
2295 | * crypto_hash_update and crypto_hash_final. The parameters have the same | |
2296 | * meaning as discussed for those separate three functions. | |
2297 | * | |
2298 | * Return: 0 if the message digest creation was successful; < 0 if an error | |
2299 | * occurred | |
2300 | */ | |
055bcee3 HX |
2301 | static inline int crypto_hash_digest(struct hash_desc *desc, |
2302 | struct scatterlist *sg, | |
2303 | unsigned int nbytes, u8 *out) | |
2304 | { | |
2305 | return crypto_hash_crt(desc->tfm)->digest(desc, sg, nbytes, out); | |
2306 | } | |
2307 | ||
47ca5be9 SM |
2308 | /** |
2309 | * crypto_hash_setkey() - set key for message digest | |
2310 | * @hash: cipher handle | |
2311 | * @key: buffer holding the key | |
2312 | * @keylen: length of the key in bytes | |
2313 | * | |
2314 | * The caller provided key is set for the message digest cipher. The cipher | |
2315 | * handle must point to a keyed hash in order for this function to succeed. | |
2316 | * | |
2317 | * Return: 0 if the setting of the key was successful; < 0 if an error occurred | |
2318 | */ | |
055bcee3 HX |
2319 | static inline int crypto_hash_setkey(struct crypto_hash *hash, |
2320 | const u8 *key, unsigned int keylen) | |
2321 | { | |
2322 | return crypto_hash_crt(hash)->setkey(hash, key, keylen); | |
1da177e4 LT |
2323 | } |
2324 | ||
fce32d70 HX |
2325 | static inline struct crypto_comp *__crypto_comp_cast(struct crypto_tfm *tfm) |
2326 | { | |
2327 | return (struct crypto_comp *)tfm; | |
2328 | } | |
2329 | ||
2330 | static inline struct crypto_comp *crypto_comp_cast(struct crypto_tfm *tfm) | |
2331 | { | |
2332 | BUG_ON((crypto_tfm_alg_type(tfm) ^ CRYPTO_ALG_TYPE_COMPRESS) & | |
2333 | CRYPTO_ALG_TYPE_MASK); | |
2334 | return __crypto_comp_cast(tfm); | |
2335 | } | |
2336 | ||
2337 | static inline struct crypto_comp *crypto_alloc_comp(const char *alg_name, | |
2338 | u32 type, u32 mask) | |
2339 | { | |
2340 | type &= ~CRYPTO_ALG_TYPE_MASK; | |
2341 | type |= CRYPTO_ALG_TYPE_COMPRESS; | |
2342 | mask |= CRYPTO_ALG_TYPE_MASK; | |
2343 | ||
2344 | return __crypto_comp_cast(crypto_alloc_base(alg_name, type, mask)); | |
2345 | } | |
2346 | ||
2347 | static inline struct crypto_tfm *crypto_comp_tfm(struct crypto_comp *tfm) | |
2348 | { | |
78a1fe4f | 2349 | return &tfm->base; |
fce32d70 HX |
2350 | } |
2351 | ||
2352 | static inline void crypto_free_comp(struct crypto_comp *tfm) | |
2353 | { | |
2354 | crypto_free_tfm(crypto_comp_tfm(tfm)); | |
2355 | } | |
2356 | ||
2357 | static inline int crypto_has_comp(const char *alg_name, u32 type, u32 mask) | |
2358 | { | |
2359 | type &= ~CRYPTO_ALG_TYPE_MASK; | |
2360 | type |= CRYPTO_ALG_TYPE_COMPRESS; | |
2361 | mask |= CRYPTO_ALG_TYPE_MASK; | |
2362 | ||
2363 | return crypto_has_alg(alg_name, type, mask); | |
2364 | } | |
2365 | ||
e4d5b79c HX |
2366 | static inline const char *crypto_comp_name(struct crypto_comp *tfm) |
2367 | { | |
2368 | return crypto_tfm_alg_name(crypto_comp_tfm(tfm)); | |
2369 | } | |
2370 | ||
fce32d70 HX |
2371 | static inline struct compress_tfm *crypto_comp_crt(struct crypto_comp *tfm) |
2372 | { | |
2373 | return &crypto_comp_tfm(tfm)->crt_compress; | |
2374 | } | |
2375 | ||
2376 | static inline int crypto_comp_compress(struct crypto_comp *tfm, | |
1da177e4 LT |
2377 | const u8 *src, unsigned int slen, |
2378 | u8 *dst, unsigned int *dlen) | |
2379 | { | |
78a1fe4f HX |
2380 | return crypto_comp_crt(tfm)->cot_compress(crypto_comp_tfm(tfm), |
2381 | src, slen, dst, dlen); | |
1da177e4 LT |
2382 | } |
2383 | ||
fce32d70 | 2384 | static inline int crypto_comp_decompress(struct crypto_comp *tfm, |
1da177e4 LT |
2385 | const u8 *src, unsigned int slen, |
2386 | u8 *dst, unsigned int *dlen) | |
2387 | { | |
78a1fe4f HX |
2388 | return crypto_comp_crt(tfm)->cot_decompress(crypto_comp_tfm(tfm), |
2389 | src, slen, dst, dlen); | |
1da177e4 LT |
2390 | } |
2391 | ||
1da177e4 LT |
2392 | #endif /* _LINUX_CRYPTO_H */ |
2393 |