Commit | Line | Data |
---|---|---|
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> |
ada69a16 | 27 | #include <linux/completion.h> |
1da177e4 | 28 | |
5d26a105 KC |
29 | /* |
30 | * Autoloaded crypto modules should only use a prefixed name to avoid allowing | |
31 | * arbitrary modules to be loaded. Loading from userspace may still need the | |
32 | * unprefixed names, so retains those aliases as well. | |
33 | * This uses __MODULE_INFO directly instead of MODULE_ALIAS because pre-4.3 | |
34 | * gcc (e.g. avr32 toolchain) uses __LINE__ for uniqueness, and this macro | |
35 | * expands twice on the same line. Instead, use a separate base name for the | |
36 | * alias. | |
37 | */ | |
38 | #define MODULE_ALIAS_CRYPTO(name) \ | |
39 | __MODULE_INFO(alias, alias_userspace, name); \ | |
40 | __MODULE_INFO(alias, alias_crypto, "crypto-" name) | |
41 | ||
1da177e4 LT |
42 | /* |
43 | * Algorithm masks and types. | |
44 | */ | |
2825982d | 45 | #define CRYPTO_ALG_TYPE_MASK 0x0000000f |
1da177e4 | 46 | #define CRYPTO_ALG_TYPE_CIPHER 0x00000001 |
004a403c LH |
47 | #define CRYPTO_ALG_TYPE_COMPRESS 0x00000002 |
48 | #define CRYPTO_ALG_TYPE_AEAD 0x00000003 | |
055bcee3 | 49 | #define CRYPTO_ALG_TYPE_BLKCIPHER 0x00000004 |
332f8840 | 50 | #define CRYPTO_ALG_TYPE_ABLKCIPHER 0x00000005 |
4e6c3df4 | 51 | #define CRYPTO_ALG_TYPE_SKCIPHER 0x00000005 |
61da88e2 | 52 | #define CRYPTO_ALG_TYPE_GIVCIPHER 0x00000006 |
4e5f2c40 | 53 | #define CRYPTO_ALG_TYPE_KPP 0x00000008 |
2ebda74f | 54 | #define CRYPTO_ALG_TYPE_ACOMPRESS 0x0000000a |
1ab53a77 | 55 | #define CRYPTO_ALG_TYPE_SCOMPRESS 0x0000000b |
17f0f4a4 | 56 | #define CRYPTO_ALG_TYPE_RNG 0x0000000c |
3c339ab8 | 57 | #define CRYPTO_ALG_TYPE_AKCIPHER 0x0000000d |
63044c4f GC |
58 | #define CRYPTO_ALG_TYPE_DIGEST 0x0000000e |
59 | #define CRYPTO_ALG_TYPE_HASH 0x0000000e | |
60 | #define CRYPTO_ALG_TYPE_SHASH 0x0000000e | |
61 | #define CRYPTO_ALG_TYPE_AHASH 0x0000000f | |
055bcee3 HX |
62 | |
63 | #define CRYPTO_ALG_TYPE_HASH_MASK 0x0000000e | |
63044c4f | 64 | #define CRYPTO_ALG_TYPE_AHASH_MASK 0x0000000e |
332f8840 | 65 | #define CRYPTO_ALG_TYPE_BLKCIPHER_MASK 0x0000000c |
1ab53a77 | 66 | #define CRYPTO_ALG_TYPE_ACOMPRESS_MASK 0x0000000e |
1da177e4 | 67 | |
2825982d | 68 | #define CRYPTO_ALG_LARVAL 0x00000010 |
6bfd4809 HX |
69 | #define CRYPTO_ALG_DEAD 0x00000020 |
70 | #define CRYPTO_ALG_DYING 0x00000040 | |
f3f632d6 | 71 | #define CRYPTO_ALG_ASYNC 0x00000080 |
2825982d | 72 | |
6010439f HX |
73 | /* |
74 | * Set this bit if and only if the algorithm requires another algorithm of | |
75 | * the same type to handle corner cases. | |
76 | */ | |
77 | #define CRYPTO_ALG_NEED_FALLBACK 0x00000100 | |
78 | ||
ecfc4329 HX |
79 | /* |
80 | * This bit is set for symmetric key ciphers that have already been wrapped | |
81 | * with a generic IV generator to prevent them from being wrapped again. | |
82 | */ | |
83 | #define CRYPTO_ALG_GENIV 0x00000200 | |
84 | ||
73d3864a HX |
85 | /* |
86 | * Set if the algorithm has passed automated run-time testing. Note that | |
87 | * if there is no run-time testing for a given algorithm it is considered | |
88 | * to have passed. | |
89 | */ | |
90 | ||
91 | #define CRYPTO_ALG_TESTED 0x00000400 | |
92 | ||
64a947b1 | 93 | /* |
864e0981 | 94 | * Set if the algorithm is an instance that is built from templates. |
64a947b1 SK |
95 | */ |
96 | #define CRYPTO_ALG_INSTANCE 0x00000800 | |
97 | ||
d912bb76 NM |
98 | /* Set this bit if the algorithm provided is hardware accelerated but |
99 | * not available to userspace via instruction set or so. | |
100 | */ | |
101 | #define CRYPTO_ALG_KERN_DRIVER_ONLY 0x00001000 | |
102 | ||
06ca7f68 SM |
103 | /* |
104 | * Mark a cipher as a service implementation only usable by another | |
105 | * cipher and never by a normal user of the kernel crypto API | |
106 | */ | |
107 | #define CRYPTO_ALG_INTERNAL 0x00002000 | |
108 | ||
a208fa8f EB |
109 | /* |
110 | * Set if the algorithm has a ->setkey() method but can be used without | |
111 | * calling it first, i.e. there is a default key. | |
112 | */ | |
113 | #define CRYPTO_ALG_OPTIONAL_KEY 0x00004000 | |
114 | ||
e2861fa7 MG |
115 | /* |
116 | * Don't trigger module loading | |
117 | */ | |
118 | #define CRYPTO_NOLOAD 0x00008000 | |
119 | ||
1da177e4 LT |
120 | /* |
121 | * Transform masks and values (for crt_flags). | |
122 | */ | |
9fa68f62 EB |
123 | #define CRYPTO_TFM_NEED_KEY 0x00000001 |
124 | ||
1da177e4 LT |
125 | #define CRYPTO_TFM_REQ_MASK 0x000fff00 |
126 | #define CRYPTO_TFM_RES_MASK 0xfff00000 | |
127 | ||
1da177e4 | 128 | #define CRYPTO_TFM_REQ_WEAK_KEY 0x00000100 |
64baf3cf | 129 | #define CRYPTO_TFM_REQ_MAY_SLEEP 0x00000200 |
32e3983f | 130 | #define CRYPTO_TFM_REQ_MAY_BACKLOG 0x00000400 |
1da177e4 LT |
131 | #define CRYPTO_TFM_RES_WEAK_KEY 0x00100000 |
132 | #define CRYPTO_TFM_RES_BAD_KEY_LEN 0x00200000 | |
133 | #define CRYPTO_TFM_RES_BAD_KEY_SCHED 0x00400000 | |
134 | #define CRYPTO_TFM_RES_BAD_BLOCK_LEN 0x00800000 | |
135 | #define CRYPTO_TFM_RES_BAD_FLAGS 0x01000000 | |
136 | ||
137 | /* | |
138 | * Miscellaneous stuff. | |
139 | */ | |
f437a3f4 | 140 | #define CRYPTO_MAX_ALG_NAME 128 |
1da177e4 | 141 | |
79911102 HX |
142 | /* |
143 | * The macro CRYPTO_MINALIGN_ATTR (along with the void * type in the actual | |
144 | * declaration) is used to ensure that the crypto_tfm context structure is | |
145 | * aligned correctly for the given architecture so that there are no alignment | |
146 | * faults for C data types. In particular, this is required on platforms such | |
147 | * as arm where pointers are 32-bit aligned but there are data types such as | |
148 | * u64 which require 64-bit alignment. | |
149 | */ | |
79911102 | 150 | #define CRYPTO_MINALIGN ARCH_KMALLOC_MINALIGN |
79911102 | 151 | |
79911102 | 152 | #define CRYPTO_MINALIGN_ATTR __attribute__ ((__aligned__(CRYPTO_MINALIGN))) |
79911102 | 153 | |
1da177e4 | 154 | struct scatterlist; |
32e3983f HX |
155 | struct crypto_ablkcipher; |
156 | struct crypto_async_request; | |
5cde0af2 | 157 | struct crypto_blkcipher; |
40725181 | 158 | struct crypto_tfm; |
e853c3cf | 159 | struct crypto_type; |
61da88e2 | 160 | struct skcipher_givcrypt_request; |
40725181 | 161 | |
32e3983f HX |
162 | typedef void (*crypto_completion_t)(struct crypto_async_request *req, int err); |
163 | ||
0d7f488f SM |
164 | /** |
165 | * DOC: Block Cipher Context Data Structures | |
166 | * | |
167 | * These data structures define the operating context for each block cipher | |
168 | * type. | |
169 | */ | |
170 | ||
32e3983f HX |
171 | struct crypto_async_request { |
172 | struct list_head list; | |
173 | crypto_completion_t complete; | |
174 | void *data; | |
175 | struct crypto_tfm *tfm; | |
176 | ||
177 | u32 flags; | |
178 | }; | |
179 | ||
180 | struct ablkcipher_request { | |
181 | struct crypto_async_request base; | |
182 | ||
183 | unsigned int nbytes; | |
184 | ||
185 | void *info; | |
186 | ||
187 | struct scatterlist *src; | |
188 | struct scatterlist *dst; | |
189 | ||
190 | void *__ctx[] CRYPTO_MINALIGN_ATTR; | |
191 | }; | |
192 | ||
5cde0af2 HX |
193 | struct blkcipher_desc { |
194 | struct crypto_blkcipher *tfm; | |
195 | void *info; | |
196 | u32 flags; | |
197 | }; | |
198 | ||
40725181 HX |
199 | struct cipher_desc { |
200 | struct crypto_tfm *tfm; | |
6c2bb98b | 201 | void (*crfn)(struct crypto_tfm *tfm, u8 *dst, const u8 *src); |
40725181 HX |
202 | unsigned int (*prfn)(const struct cipher_desc *desc, u8 *dst, |
203 | const u8 *src, unsigned int nbytes); | |
204 | void *info; | |
205 | }; | |
1da177e4 | 206 | |
0d7f488f SM |
207 | /** |
208 | * DOC: Block Cipher Algorithm Definitions | |
209 | * | |
210 | * These data structures define modular crypto algorithm implementations, | |
211 | * managed via crypto_register_alg() and crypto_unregister_alg(). | |
212 | */ | |
213 | ||
214 | /** | |
215 | * struct ablkcipher_alg - asynchronous block cipher definition | |
216 | * @min_keysize: Minimum key size supported by the transformation. This is the | |
217 | * smallest key length supported by this transformation algorithm. | |
218 | * This must be set to one of the pre-defined values as this is | |
219 | * not hardware specific. Possible values for this field can be | |
220 | * found via git grep "_MIN_KEY_SIZE" include/crypto/ | |
221 | * @max_keysize: Maximum key size supported by the transformation. This is the | |
222 | * largest key length supported by this transformation algorithm. | |
223 | * This must be set to one of the pre-defined values as this is | |
224 | * not hardware specific. Possible values for this field can be | |
225 | * found via git grep "_MAX_KEY_SIZE" include/crypto/ | |
226 | * @setkey: Set key for the transformation. This function is used to either | |
227 | * program a supplied key into the hardware or store the key in the | |
228 | * transformation context for programming it later. Note that this | |
229 | * function does modify the transformation context. This function can | |
230 | * be called multiple times during the existence of the transformation | |
231 | * object, so one must make sure the key is properly reprogrammed into | |
232 | * the hardware. This function is also responsible for checking the key | |
233 | * length for validity. In case a software fallback was put in place in | |
234 | * the @cra_init call, this function might need to use the fallback if | |
235 | * the algorithm doesn't support all of the key sizes. | |
236 | * @encrypt: Encrypt a scatterlist of blocks. This function is used to encrypt | |
237 | * the supplied scatterlist containing the blocks of data. The crypto | |
238 | * API consumer is responsible for aligning the entries of the | |
239 | * scatterlist properly and making sure the chunks are correctly | |
240 | * sized. In case a software fallback was put in place in the | |
241 | * @cra_init call, this function might need to use the fallback if | |
242 | * the algorithm doesn't support all of the key sizes. In case the | |
243 | * key was stored in transformation context, the key might need to be | |
244 | * re-programmed into the hardware in this function. This function | |
245 | * shall not modify the transformation context, as this function may | |
246 | * be called in parallel with the same transformation object. | |
247 | * @decrypt: Decrypt a single block. This is a reverse counterpart to @encrypt | |
248 | * and the conditions are exactly the same. | |
249 | * @givencrypt: Update the IV for encryption. With this function, a cipher | |
250 | * implementation may provide the function on how to update the IV | |
251 | * for encryption. | |
252 | * @givdecrypt: Update the IV for decryption. This is the reverse of | |
253 | * @givencrypt . | |
254 | * @geniv: The transformation implementation may use an "IV generator" provided | |
255 | * by the kernel crypto API. Several use cases have a predefined | |
256 | * approach how IVs are to be updated. For such use cases, the kernel | |
257 | * crypto API provides ready-to-use implementations that can be | |
258 | * referenced with this variable. | |
259 | * @ivsize: IV size applicable for transformation. The consumer must provide an | |
260 | * IV of exactly that size to perform the encrypt or decrypt operation. | |
261 | * | |
262 | * All fields except @givencrypt , @givdecrypt , @geniv and @ivsize are | |
263 | * mandatory and must be filled. | |
1da177e4 | 264 | */ |
b5b7f088 HX |
265 | struct ablkcipher_alg { |
266 | int (*setkey)(struct crypto_ablkcipher *tfm, const u8 *key, | |
267 | unsigned int keylen); | |
268 | int (*encrypt)(struct ablkcipher_request *req); | |
269 | int (*decrypt)(struct ablkcipher_request *req); | |
61da88e2 HX |
270 | int (*givencrypt)(struct skcipher_givcrypt_request *req); |
271 | int (*givdecrypt)(struct skcipher_givcrypt_request *req); | |
b5b7f088 | 272 | |
23508e11 HX |
273 | const char *geniv; |
274 | ||
b5b7f088 HX |
275 | unsigned int min_keysize; |
276 | unsigned int max_keysize; | |
277 | unsigned int ivsize; | |
278 | }; | |
279 | ||
0d7f488f SM |
280 | /** |
281 | * struct blkcipher_alg - synchronous block cipher definition | |
282 | * @min_keysize: see struct ablkcipher_alg | |
283 | * @max_keysize: see struct ablkcipher_alg | |
284 | * @setkey: see struct ablkcipher_alg | |
285 | * @encrypt: see struct ablkcipher_alg | |
286 | * @decrypt: see struct ablkcipher_alg | |
287 | * @geniv: see struct ablkcipher_alg | |
288 | * @ivsize: see struct ablkcipher_alg | |
289 | * | |
290 | * All fields except @geniv and @ivsize are mandatory and must be filled. | |
291 | */ | |
5cde0af2 HX |
292 | struct blkcipher_alg { |
293 | int (*setkey)(struct crypto_tfm *tfm, const u8 *key, | |
294 | unsigned int keylen); | |
295 | int (*encrypt)(struct blkcipher_desc *desc, | |
296 | struct scatterlist *dst, struct scatterlist *src, | |
297 | unsigned int nbytes); | |
298 | int (*decrypt)(struct blkcipher_desc *desc, | |
299 | struct scatterlist *dst, struct scatterlist *src, | |
300 | unsigned int nbytes); | |
301 | ||
23508e11 HX |
302 | const char *geniv; |
303 | ||
5cde0af2 HX |
304 | unsigned int min_keysize; |
305 | unsigned int max_keysize; | |
306 | unsigned int ivsize; | |
307 | }; | |
308 | ||
0d7f488f SM |
309 | /** |
310 | * struct cipher_alg - single-block symmetric ciphers definition | |
311 | * @cia_min_keysize: Minimum key size supported by the transformation. This is | |
312 | * the smallest key length supported by this transformation | |
313 | * algorithm. This must be set to one of the pre-defined | |
314 | * values as this is not hardware specific. Possible values | |
315 | * for this field can be found via git grep "_MIN_KEY_SIZE" | |
316 | * include/crypto/ | |
317 | * @cia_max_keysize: Maximum key size supported by the transformation. This is | |
318 | * the largest key length supported by this transformation | |
319 | * algorithm. This must be set to one of the pre-defined values | |
320 | * as this is not hardware specific. Possible values for this | |
321 | * field can be found via git grep "_MAX_KEY_SIZE" | |
322 | * include/crypto/ | |
323 | * @cia_setkey: Set key for the transformation. This function is used to either | |
324 | * program a supplied key into the hardware or store the key in the | |
325 | * transformation context for programming it later. Note that this | |
326 | * function does modify the transformation context. This function | |
327 | * can be called multiple times during the existence of the | |
328 | * transformation object, so one must make sure the key is properly | |
329 | * reprogrammed into the hardware. This function is also | |
330 | * responsible for checking the key length for validity. | |
331 | * @cia_encrypt: Encrypt a single block. This function is used to encrypt a | |
332 | * single block of data, which must be @cra_blocksize big. This | |
333 | * always operates on a full @cra_blocksize and it is not possible | |
334 | * to encrypt a block of smaller size. The supplied buffers must | |
335 | * therefore also be at least of @cra_blocksize size. Both the | |
336 | * input and output buffers are always aligned to @cra_alignmask. | |
337 | * In case either of the input or output buffer supplied by user | |
338 | * of the crypto API is not aligned to @cra_alignmask, the crypto | |
339 | * API will re-align the buffers. The re-alignment means that a | |
340 | * new buffer will be allocated, the data will be copied into the | |
341 | * new buffer, then the processing will happen on the new buffer, | |
342 | * then the data will be copied back into the original buffer and | |
343 | * finally the new buffer will be freed. In case a software | |
344 | * fallback was put in place in the @cra_init call, this function | |
345 | * might need to use the fallback if the algorithm doesn't support | |
346 | * all of the key sizes. In case the key was stored in | |
347 | * transformation context, the key might need to be re-programmed | |
348 | * into the hardware in this function. This function shall not | |
349 | * modify the transformation context, as this function may be | |
350 | * called in parallel with the same transformation object. | |
351 | * @cia_decrypt: Decrypt a single block. This is a reverse counterpart to | |
352 | * @cia_encrypt, and the conditions are exactly the same. | |
353 | * | |
354 | * All fields are mandatory and must be filled. | |
355 | */ | |
1da177e4 LT |
356 | struct cipher_alg { |
357 | unsigned int cia_min_keysize; | |
358 | unsigned int cia_max_keysize; | |
6c2bb98b | 359 | int (*cia_setkey)(struct crypto_tfm *tfm, const u8 *key, |
560c06ae | 360 | unsigned int keylen); |
6c2bb98b HX |
361 | void (*cia_encrypt)(struct crypto_tfm *tfm, u8 *dst, const u8 *src); |
362 | void (*cia_decrypt)(struct crypto_tfm *tfm, u8 *dst, const u8 *src); | |
1da177e4 LT |
363 | }; |
364 | ||
1da177e4 | 365 | struct compress_alg { |
6c2bb98b HX |
366 | int (*coa_compress)(struct crypto_tfm *tfm, const u8 *src, |
367 | unsigned int slen, u8 *dst, unsigned int *dlen); | |
368 | int (*coa_decompress)(struct crypto_tfm *tfm, const u8 *src, | |
369 | unsigned int slen, u8 *dst, unsigned int *dlen); | |
1da177e4 LT |
370 | }; |
371 | ||
17c18f9e CL |
372 | #ifdef CONFIG_CRYPTO_STATS |
373 | /* | |
374 | * struct crypto_istat_aead - statistics for AEAD algorithm | |
375 | * @encrypt_cnt: number of encrypt requests | |
376 | * @encrypt_tlen: total data size handled by encrypt requests | |
377 | * @decrypt_cnt: number of decrypt requests | |
378 | * @decrypt_tlen: total data size handled by decrypt requests | |
44f13133 | 379 | * @err_cnt: number of error for AEAD requests |
17c18f9e CL |
380 | */ |
381 | struct crypto_istat_aead { | |
382 | atomic64_t encrypt_cnt; | |
383 | atomic64_t encrypt_tlen; | |
384 | atomic64_t decrypt_cnt; | |
385 | atomic64_t decrypt_tlen; | |
44f13133 | 386 | atomic64_t err_cnt; |
17c18f9e CL |
387 | }; |
388 | ||
389 | /* | |
390 | * struct crypto_istat_akcipher - statistics for akcipher algorithm | |
391 | * @encrypt_cnt: number of encrypt requests | |
392 | * @encrypt_tlen: total data size handled by encrypt requests | |
393 | * @decrypt_cnt: number of decrypt requests | |
394 | * @decrypt_tlen: total data size handled by decrypt requests | |
395 | * @verify_cnt: number of verify operation | |
396 | * @sign_cnt: number of sign requests | |
44f13133 | 397 | * @err_cnt: number of error for akcipher requests |
17c18f9e CL |
398 | */ |
399 | struct crypto_istat_akcipher { | |
400 | atomic64_t encrypt_cnt; | |
401 | atomic64_t encrypt_tlen; | |
402 | atomic64_t decrypt_cnt; | |
403 | atomic64_t decrypt_tlen; | |
404 | atomic64_t verify_cnt; | |
405 | atomic64_t sign_cnt; | |
44f13133 | 406 | atomic64_t err_cnt; |
17c18f9e CL |
407 | }; |
408 | ||
409 | /* | |
410 | * struct crypto_istat_cipher - statistics for cipher algorithm | |
411 | * @encrypt_cnt: number of encrypt requests | |
412 | * @encrypt_tlen: total data size handled by encrypt requests | |
413 | * @decrypt_cnt: number of decrypt requests | |
414 | * @decrypt_tlen: total data size handled by decrypt requests | |
44f13133 | 415 | * @err_cnt: number of error for cipher requests |
17c18f9e CL |
416 | */ |
417 | struct crypto_istat_cipher { | |
418 | atomic64_t encrypt_cnt; | |
419 | atomic64_t encrypt_tlen; | |
420 | atomic64_t decrypt_cnt; | |
421 | atomic64_t decrypt_tlen; | |
44f13133 | 422 | atomic64_t err_cnt; |
17c18f9e CL |
423 | }; |
424 | ||
425 | /* | |
426 | * struct crypto_istat_compress - statistics for compress algorithm | |
427 | * @compress_cnt: number of compress requests | |
428 | * @compress_tlen: total data size handled by compress requests | |
429 | * @decompress_cnt: number of decompress requests | |
430 | * @decompress_tlen: total data size handled by decompress requests | |
44f13133 | 431 | * @err_cnt: number of error for compress requests |
17c18f9e CL |
432 | */ |
433 | struct crypto_istat_compress { | |
434 | atomic64_t compress_cnt; | |
435 | atomic64_t compress_tlen; | |
436 | atomic64_t decompress_cnt; | |
437 | atomic64_t decompress_tlen; | |
44f13133 | 438 | atomic64_t err_cnt; |
17c18f9e CL |
439 | }; |
440 | ||
441 | /* | |
442 | * struct crypto_istat_hash - statistics for has algorithm | |
443 | * @hash_cnt: number of hash requests | |
444 | * @hash_tlen: total data size hashed | |
44f13133 | 445 | * @err_cnt: number of error for hash requests |
17c18f9e CL |
446 | */ |
447 | struct crypto_istat_hash { | |
448 | atomic64_t hash_cnt; | |
449 | atomic64_t hash_tlen; | |
44f13133 | 450 | atomic64_t err_cnt; |
17c18f9e CL |
451 | }; |
452 | ||
453 | /* | |
454 | * struct crypto_istat_kpp - statistics for KPP algorithm | |
455 | * @setsecret_cnt: number of setsecrey operation | |
456 | * @generate_public_key_cnt: number of generate_public_key operation | |
457 | * @compute_shared_secret_cnt: number of compute_shared_secret operation | |
44f13133 | 458 | * @err_cnt: number of error for KPP requests |
17c18f9e CL |
459 | */ |
460 | struct crypto_istat_kpp { | |
461 | atomic64_t setsecret_cnt; | |
462 | atomic64_t generate_public_key_cnt; | |
463 | atomic64_t compute_shared_secret_cnt; | |
44f13133 | 464 | atomic64_t err_cnt; |
17c18f9e CL |
465 | }; |
466 | ||
467 | /* | |
468 | * struct crypto_istat_rng: statistics for RNG algorithm | |
469 | * @generate_cnt: number of RNG generate requests | |
470 | * @generate_tlen: total data size of generated data by the RNG | |
471 | * @seed_cnt: number of times the RNG was seeded | |
44f13133 | 472 | * @err_cnt: number of error for RNG requests |
17c18f9e CL |
473 | */ |
474 | struct crypto_istat_rng { | |
475 | atomic64_t generate_cnt; | |
476 | atomic64_t generate_tlen; | |
477 | atomic64_t seed_cnt; | |
44f13133 | 478 | atomic64_t err_cnt; |
17c18f9e CL |
479 | }; |
480 | #endif /* CONFIG_CRYPTO_STATS */ | |
17f0f4a4 | 481 | |
b5b7f088 | 482 | #define cra_ablkcipher cra_u.ablkcipher |
5cde0af2 | 483 | #define cra_blkcipher cra_u.blkcipher |
1da177e4 | 484 | #define cra_cipher cra_u.cipher |
1da177e4 LT |
485 | #define cra_compress cra_u.compress |
486 | ||
0d7f488f SM |
487 | /** |
488 | * struct crypto_alg - definition of a cryptograpic cipher algorithm | |
489 | * @cra_flags: Flags describing this transformation. See include/linux/crypto.h | |
490 | * CRYPTO_ALG_* flags for the flags which go in here. Those are | |
491 | * used for fine-tuning the description of the transformation | |
492 | * algorithm. | |
493 | * @cra_blocksize: Minimum block size of this transformation. The size in bytes | |
494 | * of the smallest possible unit which can be transformed with | |
495 | * this algorithm. The users must respect this value. | |
496 | * In case of HASH transformation, it is possible for a smaller | |
497 | * block than @cra_blocksize to be passed to the crypto API for | |
498 | * transformation, in case of any other transformation type, an | |
499 | * error will be returned upon any attempt to transform smaller | |
500 | * than @cra_blocksize chunks. | |
501 | * @cra_ctxsize: Size of the operational context of the transformation. This | |
502 | * value informs the kernel crypto API about the memory size | |
503 | * needed to be allocated for the transformation context. | |
504 | * @cra_alignmask: Alignment mask for the input and output data buffer. The data | |
505 | * buffer containing the input data for the algorithm must be | |
506 | * aligned to this alignment mask. The data buffer for the | |
507 | * output data must be aligned to this alignment mask. Note that | |
508 | * the Crypto API will do the re-alignment in software, but | |
509 | * only under special conditions and there is a performance hit. | |
510 | * The re-alignment happens at these occasions for different | |
511 | * @cra_u types: cipher -- For both input data and output data | |
512 | * buffer; ahash -- For output hash destination buf; shash -- | |
513 | * For output hash destination buf. | |
514 | * This is needed on hardware which is flawed by design and | |
515 | * cannot pick data from arbitrary addresses. | |
516 | * @cra_priority: Priority of this transformation implementation. In case | |
517 | * multiple transformations with same @cra_name are available to | |
518 | * the Crypto API, the kernel will use the one with highest | |
519 | * @cra_priority. | |
520 | * @cra_name: Generic name (usable by multiple implementations) of the | |
521 | * transformation algorithm. This is the name of the transformation | |
522 | * itself. This field is used by the kernel when looking up the | |
523 | * providers of particular transformation. | |
524 | * @cra_driver_name: Unique name of the transformation provider. This is the | |
525 | * name of the provider of the transformation. This can be any | |
526 | * arbitrary value, but in the usual case, this contains the | |
527 | * name of the chip or provider and the name of the | |
528 | * transformation algorithm. | |
529 | * @cra_type: Type of the cryptographic transformation. This is a pointer to | |
530 | * struct crypto_type, which implements callbacks common for all | |
12f7c14a | 531 | * transformation types. There are multiple options: |
0d7f488f | 532 | * &crypto_blkcipher_type, &crypto_ablkcipher_type, |
b0d955ba | 533 | * &crypto_ahash_type, &crypto_rng_type. |
0d7f488f SM |
534 | * This field might be empty. In that case, there are no common |
535 | * callbacks. This is the case for: cipher, compress, shash. | |
536 | * @cra_u: Callbacks implementing the transformation. This is a union of | |
537 | * multiple structures. Depending on the type of transformation selected | |
538 | * by @cra_type and @cra_flags above, the associated structure must be | |
539 | * filled with callbacks. This field might be empty. This is the case | |
540 | * for ahash, shash. | |
541 | * @cra_init: Initialize the cryptographic transformation object. This function | |
542 | * is used to initialize the cryptographic transformation object. | |
543 | * This function is called only once at the instantiation time, right | |
544 | * after the transformation context was allocated. In case the | |
545 | * cryptographic hardware has some special requirements which need to | |
546 | * be handled by software, this function shall check for the precise | |
547 | * requirement of the transformation and put any software fallbacks | |
548 | * in place. | |
549 | * @cra_exit: Deinitialize the cryptographic transformation object. This is a | |
550 | * counterpart to @cra_init, used to remove various changes set in | |
551 | * @cra_init. | |
0063ec44 GH |
552 | * @cra_u.ablkcipher: Union member which contains an asynchronous block cipher |
553 | * definition. See @struct @ablkcipher_alg. | |
554 | * @cra_u.blkcipher: Union member which contains a synchronous block cipher | |
555 | * definition See @struct @blkcipher_alg. | |
556 | * @cra_u.cipher: Union member which contains a single-block symmetric cipher | |
557 | * definition. See @struct @cipher_alg. | |
558 | * @cra_u.compress: Union member which contains a (de)compression algorithm. | |
559 | * See @struct @compress_alg. | |
0d7f488f SM |
560 | * @cra_module: Owner of this transformation implementation. Set to THIS_MODULE |
561 | * @cra_list: internally used | |
562 | * @cra_users: internally used | |
563 | * @cra_refcnt: internally used | |
564 | * @cra_destroy: internally used | |
565 | * | |
17c18f9e | 566 | * @stats: union of all possible crypto_istat_xxx structures |
cac5818c | 567 | * |
0d7f488f SM |
568 | * The struct crypto_alg describes a generic Crypto API algorithm and is common |
569 | * for all of the transformations. Any variable not documented here shall not | |
570 | * be used by a cipher implementation as it is internal to the Crypto API. | |
571 | */ | |
1da177e4 LT |
572 | struct crypto_alg { |
573 | struct list_head cra_list; | |
6bfd4809 HX |
574 | struct list_head cra_users; |
575 | ||
1da177e4 LT |
576 | u32 cra_flags; |
577 | unsigned int cra_blocksize; | |
578 | unsigned int cra_ctxsize; | |
95477377 | 579 | unsigned int cra_alignmask; |
5cb1454b HX |
580 | |
581 | int cra_priority; | |
ce8614a3 | 582 | refcount_t cra_refcnt; |
5cb1454b | 583 | |
d913ea0d HX |
584 | char cra_name[CRYPTO_MAX_ALG_NAME]; |
585 | char cra_driver_name[CRYPTO_MAX_ALG_NAME]; | |
1da177e4 | 586 | |
e853c3cf HX |
587 | const struct crypto_type *cra_type; |
588 | ||
1da177e4 | 589 | union { |
b5b7f088 | 590 | struct ablkcipher_alg ablkcipher; |
5cde0af2 | 591 | struct blkcipher_alg blkcipher; |
1da177e4 | 592 | struct cipher_alg cipher; |
1da177e4 LT |
593 | struct compress_alg compress; |
594 | } cra_u; | |
c7fc0599 HX |
595 | |
596 | int (*cra_init)(struct crypto_tfm *tfm); | |
597 | void (*cra_exit)(struct crypto_tfm *tfm); | |
6521f302 | 598 | void (*cra_destroy)(struct crypto_alg *alg); |
1da177e4 LT |
599 | |
600 | struct module *cra_module; | |
cac5818c | 601 | |
2ced2607 | 602 | #ifdef CONFIG_CRYPTO_STATS |
cac5818c | 603 | union { |
17c18f9e CL |
604 | struct crypto_istat_aead aead; |
605 | struct crypto_istat_akcipher akcipher; | |
606 | struct crypto_istat_cipher cipher; | |
607 | struct crypto_istat_compress compress; | |
608 | struct crypto_istat_hash hash; | |
609 | struct crypto_istat_rng rng; | |
610 | struct crypto_istat_kpp kpp; | |
611 | } stats; | |
2ced2607 | 612 | #endif /* CONFIG_CRYPTO_STATS */ |
cac5818c | 613 | |
edf18b91 | 614 | } CRYPTO_MINALIGN_ATTR; |
1da177e4 | 615 | |
f7d76e05 CL |
616 | #ifdef CONFIG_CRYPTO_STATS |
617 | void crypto_stats_get(struct crypto_alg *alg); | |
618 | void crypto_stats_ablkcipher_encrypt(unsigned int nbytes, int ret, struct crypto_alg *alg); | |
619 | void crypto_stats_ablkcipher_decrypt(unsigned int nbytes, int ret, struct crypto_alg *alg); | |
620 | void crypto_stats_aead_encrypt(unsigned int cryptlen, struct crypto_alg *alg, int ret); | |
621 | void crypto_stats_aead_decrypt(unsigned int cryptlen, struct crypto_alg *alg, int ret); | |
622 | void crypto_stats_ahash_update(unsigned int nbytes, int ret, struct crypto_alg *alg); | |
623 | void crypto_stats_ahash_final(unsigned int nbytes, int ret, struct crypto_alg *alg); | |
624 | void crypto_stats_akcipher_encrypt(unsigned int src_len, int ret, struct crypto_alg *alg); | |
625 | void crypto_stats_akcipher_decrypt(unsigned int src_len, int ret, struct crypto_alg *alg); | |
626 | void crypto_stats_akcipher_sign(int ret, struct crypto_alg *alg); | |
627 | void crypto_stats_akcipher_verify(int ret, struct crypto_alg *alg); | |
628 | void crypto_stats_compress(unsigned int slen, int ret, struct crypto_alg *alg); | |
629 | void crypto_stats_decompress(unsigned int slen, int ret, struct crypto_alg *alg); | |
630 | void crypto_stats_kpp_set_secret(struct crypto_alg *alg, int ret); | |
631 | void crypto_stats_kpp_generate_public_key(struct crypto_alg *alg, int ret); | |
632 | void crypto_stats_kpp_compute_shared_secret(struct crypto_alg *alg, int ret); | |
633 | void crypto_stats_rng_seed(struct crypto_alg *alg, int ret); | |
634 | void crypto_stats_rng_generate(struct crypto_alg *alg, unsigned int dlen, int ret); | |
635 | void crypto_stats_skcipher_encrypt(unsigned int cryptlen, int ret, struct crypto_alg *alg); | |
636 | void crypto_stats_skcipher_decrypt(unsigned int cryptlen, int ret, struct crypto_alg *alg); | |
637 | #else | |
638 | static inline void crypto_stats_get(struct crypto_alg *alg) | |
639 | {} | |
640 | static inline void crypto_stats_ablkcipher_encrypt(unsigned int nbytes, int ret, struct crypto_alg *alg) | |
641 | {} | |
642 | static inline void crypto_stats_ablkcipher_decrypt(unsigned int nbytes, int ret, struct crypto_alg *alg) | |
643 | {} | |
644 | static inline void crypto_stats_aead_encrypt(unsigned int cryptlen, struct crypto_alg *alg, int ret) | |
645 | {} | |
646 | static inline void crypto_stats_aead_decrypt(unsigned int cryptlen, struct crypto_alg *alg, int ret) | |
647 | {} | |
648 | static inline void crypto_stats_ahash_update(unsigned int nbytes, int ret, struct crypto_alg *alg) | |
649 | {} | |
650 | static inline void crypto_stats_ahash_final(unsigned int nbytes, int ret, struct crypto_alg *alg) | |
651 | {} | |
652 | static inline void crypto_stats_akcipher_encrypt(unsigned int src_len, int ret, struct crypto_alg *alg) | |
653 | {} | |
654 | static inline void crypto_stats_akcipher_decrypt(unsigned int src_len, int ret, struct crypto_alg *alg) | |
655 | {} | |
656 | static inline void crypto_stats_akcipher_sign(int ret, struct crypto_alg *alg) | |
657 | {} | |
658 | static inline void crypto_stats_akcipher_verify(int ret, struct crypto_alg *alg) | |
659 | {} | |
660 | static inline void crypto_stats_compress(unsigned int slen, int ret, struct crypto_alg *alg) | |
661 | {} | |
662 | static inline void crypto_stats_decompress(unsigned int slen, int ret, struct crypto_alg *alg) | |
663 | {} | |
664 | static inline void crypto_stats_kpp_set_secret(struct crypto_alg *alg, int ret) | |
665 | {} | |
666 | static inline void crypto_stats_kpp_generate_public_key(struct crypto_alg *alg, int ret) | |
667 | {} | |
668 | static inline void crypto_stats_kpp_compute_shared_secret(struct crypto_alg *alg, int ret) | |
669 | {} | |
670 | static inline void crypto_stats_rng_seed(struct crypto_alg *alg, int ret) | |
671 | {} | |
672 | static inline void crypto_stats_rng_generate(struct crypto_alg *alg, unsigned int dlen, int ret) | |
673 | {} | |
674 | static inline void crypto_stats_skcipher_encrypt(unsigned int cryptlen, int ret, struct crypto_alg *alg) | |
675 | {} | |
676 | static inline void crypto_stats_skcipher_decrypt(unsigned int cryptlen, int ret, struct crypto_alg *alg) | |
677 | {} | |
678 | #endif | |
ada69a16 GBY |
679 | /* |
680 | * A helper struct for waiting for completion of async crypto ops | |
681 | */ | |
682 | struct crypto_wait { | |
683 | struct completion completion; | |
684 | int err; | |
685 | }; | |
686 | ||
687 | /* | |
688 | * Macro for declaring a crypto op async wait object on stack | |
689 | */ | |
690 | #define DECLARE_CRYPTO_WAIT(_wait) \ | |
691 | struct crypto_wait _wait = { \ | |
692 | COMPLETION_INITIALIZER_ONSTACK((_wait).completion), 0 } | |
693 | ||
694 | /* | |
695 | * Async ops completion helper functioons | |
696 | */ | |
697 | void crypto_req_done(struct crypto_async_request *req, int err); | |
698 | ||
699 | static inline int crypto_wait_req(int err, struct crypto_wait *wait) | |
700 | { | |
701 | switch (err) { | |
702 | case -EINPROGRESS: | |
703 | case -EBUSY: | |
704 | wait_for_completion(&wait->completion); | |
705 | reinit_completion(&wait->completion); | |
706 | err = wait->err; | |
707 | break; | |
708 | }; | |
709 | ||
710 | return err; | |
711 | } | |
712 | ||
713 | static inline void crypto_init_wait(struct crypto_wait *wait) | |
714 | { | |
715 | init_completion(&wait->completion); | |
716 | } | |
717 | ||
1da177e4 LT |
718 | /* |
719 | * Algorithm registration interface. | |
720 | */ | |
721 | int crypto_register_alg(struct crypto_alg *alg); | |
722 | int crypto_unregister_alg(struct crypto_alg *alg); | |
4b004346 MB |
723 | int crypto_register_algs(struct crypto_alg *algs, int count); |
724 | int crypto_unregister_algs(struct crypto_alg *algs, int count); | |
1da177e4 LT |
725 | |
726 | /* | |
727 | * Algorithm query interface. | |
728 | */ | |
fce32d70 | 729 | int crypto_has_alg(const char *name, u32 type, u32 mask); |
1da177e4 LT |
730 | |
731 | /* | |
732 | * Transforms: user-instantiated objects which encapsulate algorithms | |
6d7d684d HX |
733 | * and core processing logic. Managed via crypto_alloc_*() and |
734 | * crypto_free_*(), as well as the various helpers below. | |
1da177e4 | 735 | */ |
1da177e4 | 736 | |
32e3983f HX |
737 | struct ablkcipher_tfm { |
738 | int (*setkey)(struct crypto_ablkcipher *tfm, const u8 *key, | |
739 | unsigned int keylen); | |
740 | int (*encrypt)(struct ablkcipher_request *req); | |
741 | int (*decrypt)(struct ablkcipher_request *req); | |
61da88e2 | 742 | |
ecfc4329 HX |
743 | struct crypto_ablkcipher *base; |
744 | ||
32e3983f HX |
745 | unsigned int ivsize; |
746 | unsigned int reqsize; | |
747 | }; | |
748 | ||
5cde0af2 HX |
749 | struct blkcipher_tfm { |
750 | void *iv; | |
751 | int (*setkey)(struct crypto_tfm *tfm, const u8 *key, | |
752 | unsigned int keylen); | |
753 | int (*encrypt)(struct blkcipher_desc *desc, struct scatterlist *dst, | |
754 | struct scatterlist *src, unsigned int nbytes); | |
755 | int (*decrypt)(struct blkcipher_desc *desc, struct scatterlist *dst, | |
756 | struct scatterlist *src, unsigned int nbytes); | |
757 | }; | |
758 | ||
1da177e4 | 759 | struct cipher_tfm { |
1da177e4 LT |
760 | int (*cit_setkey)(struct crypto_tfm *tfm, |
761 | const u8 *key, unsigned int keylen); | |
f28776a3 HX |
762 | void (*cit_encrypt_one)(struct crypto_tfm *tfm, u8 *dst, const u8 *src); |
763 | void (*cit_decrypt_one)(struct crypto_tfm *tfm, u8 *dst, const u8 *src); | |
1da177e4 LT |
764 | }; |
765 | ||
1da177e4 LT |
766 | struct compress_tfm { |
767 | int (*cot_compress)(struct crypto_tfm *tfm, | |
768 | const u8 *src, unsigned int slen, | |
769 | u8 *dst, unsigned int *dlen); | |
770 | int (*cot_decompress)(struct crypto_tfm *tfm, | |
771 | const u8 *src, unsigned int slen, | |
772 | u8 *dst, unsigned int *dlen); | |
773 | }; | |
774 | ||
32e3983f | 775 | #define crt_ablkcipher crt_u.ablkcipher |
5cde0af2 | 776 | #define crt_blkcipher crt_u.blkcipher |
1da177e4 | 777 | #define crt_cipher crt_u.cipher |
1da177e4 LT |
778 | #define crt_compress crt_u.compress |
779 | ||
780 | struct crypto_tfm { | |
781 | ||
782 | u32 crt_flags; | |
783 | ||
784 | union { | |
32e3983f | 785 | struct ablkcipher_tfm ablkcipher; |
5cde0af2 | 786 | struct blkcipher_tfm blkcipher; |
1da177e4 | 787 | struct cipher_tfm cipher; |
1da177e4 LT |
788 | struct compress_tfm compress; |
789 | } crt_u; | |
4a779486 HX |
790 | |
791 | void (*exit)(struct crypto_tfm *tfm); | |
1da177e4 LT |
792 | |
793 | struct crypto_alg *__crt_alg; | |
f10b7897 | 794 | |
79911102 | 795 | void *__crt_ctx[] CRYPTO_MINALIGN_ATTR; |
1da177e4 LT |
796 | }; |
797 | ||
32e3983f HX |
798 | struct crypto_ablkcipher { |
799 | struct crypto_tfm base; | |
800 | }; | |
801 | ||
5cde0af2 HX |
802 | struct crypto_blkcipher { |
803 | struct crypto_tfm base; | |
804 | }; | |
805 | ||
78a1fe4f HX |
806 | struct crypto_cipher { |
807 | struct crypto_tfm base; | |
808 | }; | |
809 | ||
810 | struct crypto_comp { | |
811 | struct crypto_tfm base; | |
812 | }; | |
813 | ||
2b8c19db HX |
814 | enum { |
815 | CRYPTOA_UNSPEC, | |
816 | CRYPTOA_ALG, | |
ebc610e5 | 817 | CRYPTOA_TYPE, |
39e1ee01 | 818 | CRYPTOA_U32, |
ebc610e5 | 819 | __CRYPTOA_MAX, |
2b8c19db HX |
820 | }; |
821 | ||
ebc610e5 HX |
822 | #define CRYPTOA_MAX (__CRYPTOA_MAX - 1) |
823 | ||
39e1ee01 HX |
824 | /* Maximum number of (rtattr) parameters for each template. */ |
825 | #define CRYPTO_MAX_ATTRS 32 | |
826 | ||
2b8c19db HX |
827 | struct crypto_attr_alg { |
828 | char name[CRYPTO_MAX_ALG_NAME]; | |
829 | }; | |
830 | ||
ebc610e5 HX |
831 | struct crypto_attr_type { |
832 | u32 type; | |
833 | u32 mask; | |
834 | }; | |
835 | ||
39e1ee01 HX |
836 | struct crypto_attr_u32 { |
837 | u32 num; | |
838 | }; | |
839 | ||
1da177e4 LT |
840 | /* |
841 | * Transform user interface. | |
842 | */ | |
843 | ||
6d7d684d | 844 | struct crypto_tfm *crypto_alloc_base(const char *alg_name, u32 type, u32 mask); |
7b2cd92a HX |
845 | void crypto_destroy_tfm(void *mem, struct crypto_tfm *tfm); |
846 | ||
847 | static inline void crypto_free_tfm(struct crypto_tfm *tfm) | |
848 | { | |
849 | return crypto_destroy_tfm(tfm, tfm); | |
850 | } | |
1da177e4 | 851 | |
da7f033d HX |
852 | int alg_test(const char *driver, const char *alg, u32 type, u32 mask); |
853 | ||
1da177e4 LT |
854 | /* |
855 | * Transform helpers which query the underlying algorithm. | |
856 | */ | |
857 | static inline const char *crypto_tfm_alg_name(struct crypto_tfm *tfm) | |
858 | { | |
859 | return tfm->__crt_alg->cra_name; | |
860 | } | |
861 | ||
b14cdd67 ML |
862 | static inline const char *crypto_tfm_alg_driver_name(struct crypto_tfm *tfm) |
863 | { | |
864 | return tfm->__crt_alg->cra_driver_name; | |
865 | } | |
866 | ||
867 | static inline int crypto_tfm_alg_priority(struct crypto_tfm *tfm) | |
868 | { | |
869 | return tfm->__crt_alg->cra_priority; | |
870 | } | |
871 | ||
1da177e4 LT |
872 | static inline u32 crypto_tfm_alg_type(struct crypto_tfm *tfm) |
873 | { | |
874 | return tfm->__crt_alg->cra_flags & CRYPTO_ALG_TYPE_MASK; | |
875 | } | |
876 | ||
1da177e4 LT |
877 | static inline unsigned int crypto_tfm_alg_blocksize(struct crypto_tfm *tfm) |
878 | { | |
879 | return tfm->__crt_alg->cra_blocksize; | |
880 | } | |
881 | ||
fbdae9f3 HX |
882 | static inline unsigned int crypto_tfm_alg_alignmask(struct crypto_tfm *tfm) |
883 | { | |
884 | return tfm->__crt_alg->cra_alignmask; | |
885 | } | |
886 | ||
f28776a3 HX |
887 | static inline u32 crypto_tfm_get_flags(struct crypto_tfm *tfm) |
888 | { | |
889 | return tfm->crt_flags; | |
890 | } | |
891 | ||
892 | static inline void crypto_tfm_set_flags(struct crypto_tfm *tfm, u32 flags) | |
893 | { | |
894 | tfm->crt_flags |= flags; | |
895 | } | |
896 | ||
897 | static inline void crypto_tfm_clear_flags(struct crypto_tfm *tfm, u32 flags) | |
898 | { | |
899 | tfm->crt_flags &= ~flags; | |
900 | } | |
901 | ||
40725181 HX |
902 | static inline void *crypto_tfm_ctx(struct crypto_tfm *tfm) |
903 | { | |
f10b7897 HX |
904 | return tfm->__crt_ctx; |
905 | } | |
906 | ||
907 | static inline unsigned int crypto_tfm_ctx_alignment(void) | |
908 | { | |
909 | struct crypto_tfm *tfm; | |
910 | return __alignof__(tfm->__crt_ctx); | |
40725181 HX |
911 | } |
912 | ||
1da177e4 LT |
913 | /* |
914 | * API wrappers. | |
915 | */ | |
32e3983f HX |
916 | static inline struct crypto_ablkcipher *__crypto_ablkcipher_cast( |
917 | struct crypto_tfm *tfm) | |
918 | { | |
919 | return (struct crypto_ablkcipher *)tfm; | |
920 | } | |
921 | ||
378f4f51 | 922 | static inline u32 crypto_skcipher_type(u32 type) |
32e3983f | 923 | { |
ecfc4329 | 924 | type &= ~(CRYPTO_ALG_TYPE_MASK | CRYPTO_ALG_GENIV); |
32e3983f | 925 | type |= CRYPTO_ALG_TYPE_BLKCIPHER; |
378f4f51 HX |
926 | return type; |
927 | } | |
928 | ||
929 | static inline u32 crypto_skcipher_mask(u32 mask) | |
930 | { | |
ecfc4329 | 931 | mask &= ~(CRYPTO_ALG_TYPE_MASK | CRYPTO_ALG_GENIV); |
332f8840 | 932 | mask |= CRYPTO_ALG_TYPE_BLKCIPHER_MASK; |
378f4f51 HX |
933 | return mask; |
934 | } | |
32e3983f | 935 | |
f13ec330 SM |
936 | /** |
937 | * DOC: Asynchronous Block Cipher API | |
938 | * | |
939 | * Asynchronous block cipher API is used with the ciphers of type | |
940 | * CRYPTO_ALG_TYPE_ABLKCIPHER (listed as type "ablkcipher" in /proc/crypto). | |
941 | * | |
942 | * Asynchronous cipher operations imply that the function invocation for a | |
943 | * cipher request returns immediately before the completion of the operation. | |
944 | * The cipher request is scheduled as a separate kernel thread and therefore | |
945 | * load-balanced on the different CPUs via the process scheduler. To allow | |
946 | * the kernel crypto API to inform the caller about the completion of a cipher | |
947 | * request, the caller must provide a callback function. That function is | |
948 | * invoked with the cipher handle when the request completes. | |
949 | * | |
950 | * To support the asynchronous operation, additional information than just the | |
951 | * cipher handle must be supplied to the kernel crypto API. That additional | |
952 | * information is given by filling in the ablkcipher_request data structure. | |
953 | * | |
954 | * For the asynchronous block cipher API, the state is maintained with the tfm | |
955 | * cipher handle. A single tfm can be used across multiple calls and in | |
956 | * parallel. For asynchronous block cipher calls, context data supplied and | |
957 | * only used by the caller can be referenced the request data structure in | |
958 | * addition to the IV used for the cipher request. The maintenance of such | |
959 | * state information would be important for a crypto driver implementer to | |
960 | * have, because when calling the callback function upon completion of the | |
961 | * cipher operation, that callback function may need some information about | |
962 | * which operation just finished if it invoked multiple in parallel. This | |
963 | * state information is unused by the kernel crypto API. | |
964 | */ | |
965 | ||
32e3983f HX |
966 | static inline struct crypto_tfm *crypto_ablkcipher_tfm( |
967 | struct crypto_ablkcipher *tfm) | |
968 | { | |
969 | return &tfm->base; | |
970 | } | |
971 | ||
f13ec330 SM |
972 | /** |
973 | * crypto_free_ablkcipher() - zeroize and free cipher handle | |
974 | * @tfm: cipher handle to be freed | |
975 | */ | |
32e3983f HX |
976 | static inline void crypto_free_ablkcipher(struct crypto_ablkcipher *tfm) |
977 | { | |
978 | crypto_free_tfm(crypto_ablkcipher_tfm(tfm)); | |
979 | } | |
980 | ||
f13ec330 SM |
981 | /** |
982 | * crypto_has_ablkcipher() - Search for the availability of an ablkcipher. | |
983 | * @alg_name: is the cra_name / name or cra_driver_name / driver name of the | |
984 | * ablkcipher | |
985 | * @type: specifies the type of the cipher | |
986 | * @mask: specifies the mask for the cipher | |
987 | * | |
988 | * Return: true when the ablkcipher is known to the kernel crypto API; false | |
989 | * otherwise | |
990 | */ | |
32e3983f HX |
991 | static inline int crypto_has_ablkcipher(const char *alg_name, u32 type, |
992 | u32 mask) | |
993 | { | |
378f4f51 HX |
994 | return crypto_has_alg(alg_name, crypto_skcipher_type(type), |
995 | crypto_skcipher_mask(mask)); | |
32e3983f HX |
996 | } |
997 | ||
998 | static inline struct ablkcipher_tfm *crypto_ablkcipher_crt( | |
999 | struct crypto_ablkcipher *tfm) | |
1000 | { | |
1001 | return &crypto_ablkcipher_tfm(tfm)->crt_ablkcipher; | |
1002 | } | |
1003 | ||
f13ec330 SM |
1004 | /** |
1005 | * crypto_ablkcipher_ivsize() - obtain IV size | |
1006 | * @tfm: cipher handle | |
1007 | * | |
1008 | * The size of the IV for the ablkcipher referenced by the cipher handle is | |
1009 | * returned. This IV size may be zero if the cipher does not need an IV. | |
1010 | * | |
1011 | * Return: IV size in bytes | |
1012 | */ | |
32e3983f HX |
1013 | static inline unsigned int crypto_ablkcipher_ivsize( |
1014 | struct crypto_ablkcipher *tfm) | |
1015 | { | |
1016 | return crypto_ablkcipher_crt(tfm)->ivsize; | |
1017 | } | |
1018 | ||
f13ec330 SM |
1019 | /** |
1020 | * crypto_ablkcipher_blocksize() - obtain block size of cipher | |
1021 | * @tfm: cipher handle | |
1022 | * | |
1023 | * The block size for the ablkcipher referenced with the cipher handle is | |
1024 | * returned. The caller may use that information to allocate appropriate | |
1025 | * memory for the data returned by the encryption or decryption operation | |
1026 | * | |
1027 | * Return: block size of cipher | |
1028 | */ | |
32e3983f HX |
1029 | static inline unsigned int crypto_ablkcipher_blocksize( |
1030 | struct crypto_ablkcipher *tfm) | |
1031 | { | |
1032 | return crypto_tfm_alg_blocksize(crypto_ablkcipher_tfm(tfm)); | |
1033 | } | |
1034 | ||
1035 | static inline unsigned int crypto_ablkcipher_alignmask( | |
1036 | struct crypto_ablkcipher *tfm) | |
1037 | { | |
1038 | return crypto_tfm_alg_alignmask(crypto_ablkcipher_tfm(tfm)); | |
1039 | } | |
1040 | ||
1041 | static inline u32 crypto_ablkcipher_get_flags(struct crypto_ablkcipher *tfm) | |
1042 | { | |
1043 | return crypto_tfm_get_flags(crypto_ablkcipher_tfm(tfm)); | |
1044 | } | |
1045 | ||
1046 | static inline void crypto_ablkcipher_set_flags(struct crypto_ablkcipher *tfm, | |
1047 | u32 flags) | |
1048 | { | |
1049 | crypto_tfm_set_flags(crypto_ablkcipher_tfm(tfm), flags); | |
1050 | } | |
1051 | ||
1052 | static inline void crypto_ablkcipher_clear_flags(struct crypto_ablkcipher *tfm, | |
1053 | u32 flags) | |
1054 | { | |
1055 | crypto_tfm_clear_flags(crypto_ablkcipher_tfm(tfm), flags); | |
1056 | } | |
1057 | ||
f13ec330 SM |
1058 | /** |
1059 | * crypto_ablkcipher_setkey() - set key for cipher | |
1060 | * @tfm: cipher handle | |
1061 | * @key: buffer holding the key | |
1062 | * @keylen: length of the key in bytes | |
1063 | * | |
1064 | * The caller provided key is set for the ablkcipher referenced by the cipher | |
1065 | * handle. | |
1066 | * | |
1067 | * Note, the key length determines the cipher type. Many block ciphers implement | |
1068 | * different cipher modes depending on the key size, such as AES-128 vs AES-192 | |
1069 | * vs. AES-256. When providing a 16 byte key for an AES cipher handle, AES-128 | |
1070 | * is performed. | |
1071 | * | |
1072 | * Return: 0 if the setting of the key was successful; < 0 if an error occurred | |
1073 | */ | |
32e3983f HX |
1074 | static inline int crypto_ablkcipher_setkey(struct crypto_ablkcipher *tfm, |
1075 | const u8 *key, unsigned int keylen) | |
1076 | { | |
ecfc4329 HX |
1077 | struct ablkcipher_tfm *crt = crypto_ablkcipher_crt(tfm); |
1078 | ||
1079 | return crt->setkey(crt->base, key, keylen); | |
32e3983f HX |
1080 | } |
1081 | ||
f13ec330 SM |
1082 | /** |
1083 | * crypto_ablkcipher_reqtfm() - obtain cipher handle from request | |
1084 | * @req: ablkcipher_request out of which the cipher handle is to be obtained | |
1085 | * | |
1086 | * Return the crypto_ablkcipher handle when furnishing an ablkcipher_request | |
1087 | * data structure. | |
1088 | * | |
1089 | * Return: crypto_ablkcipher handle | |
1090 | */ | |
32e3983f HX |
1091 | static inline struct crypto_ablkcipher *crypto_ablkcipher_reqtfm( |
1092 | struct ablkcipher_request *req) | |
1093 | { | |
1094 | return __crypto_ablkcipher_cast(req->base.tfm); | |
1095 | } | |
1096 | ||
f13ec330 SM |
1097 | /** |
1098 | * crypto_ablkcipher_encrypt() - encrypt plaintext | |
1099 | * @req: reference to the ablkcipher_request handle that holds all information | |
1100 | * needed to perform the cipher operation | |
1101 | * | |
1102 | * Encrypt plaintext data using the ablkcipher_request handle. That data | |
1103 | * structure and how it is filled with data is discussed with the | |
1104 | * ablkcipher_request_* functions. | |
1105 | * | |
1106 | * Return: 0 if the cipher operation was successful; < 0 if an error occurred | |
1107 | */ | |
32e3983f HX |
1108 | static inline int crypto_ablkcipher_encrypt(struct ablkcipher_request *req) |
1109 | { | |
1110 | struct ablkcipher_tfm *crt = | |
1111 | crypto_ablkcipher_crt(crypto_ablkcipher_reqtfm(req)); | |
f7d76e05 CL |
1112 | struct crypto_alg *alg = crt->base->base.__crt_alg; |
1113 | unsigned int nbytes = req->nbytes; | |
cac5818c CL |
1114 | int ret; |
1115 | ||
f7d76e05 | 1116 | crypto_stats_get(alg); |
cac5818c | 1117 | ret = crt->encrypt(req); |
f7d76e05 | 1118 | crypto_stats_ablkcipher_encrypt(nbytes, ret, alg); |
cac5818c | 1119 | return ret; |
32e3983f HX |
1120 | } |
1121 | ||
f13ec330 SM |
1122 | /** |
1123 | * crypto_ablkcipher_decrypt() - decrypt ciphertext | |
1124 | * @req: reference to the ablkcipher_request handle that holds all information | |
1125 | * needed to perform the cipher operation | |
1126 | * | |
1127 | * Decrypt ciphertext data using the ablkcipher_request handle. That data | |
1128 | * structure and how it is filled with data is discussed with the | |
1129 | * ablkcipher_request_* functions. | |
1130 | * | |
1131 | * Return: 0 if the cipher operation was successful; < 0 if an error occurred | |
1132 | */ | |
32e3983f HX |
1133 | static inline int crypto_ablkcipher_decrypt(struct ablkcipher_request *req) |
1134 | { | |
1135 | struct ablkcipher_tfm *crt = | |
1136 | crypto_ablkcipher_crt(crypto_ablkcipher_reqtfm(req)); | |
f7d76e05 CL |
1137 | struct crypto_alg *alg = crt->base->base.__crt_alg; |
1138 | unsigned int nbytes = req->nbytes; | |
cac5818c CL |
1139 | int ret; |
1140 | ||
f7d76e05 | 1141 | crypto_stats_get(alg); |
cac5818c | 1142 | ret = crt->decrypt(req); |
f7d76e05 | 1143 | crypto_stats_ablkcipher_decrypt(nbytes, ret, alg); |
cac5818c | 1144 | return ret; |
32e3983f HX |
1145 | } |
1146 | ||
f13ec330 SM |
1147 | /** |
1148 | * DOC: Asynchronous Cipher Request Handle | |
1149 | * | |
1150 | * The ablkcipher_request data structure contains all pointers to data | |
1151 | * required for the asynchronous cipher operation. This includes the cipher | |
1152 | * handle (which can be used by multiple ablkcipher_request instances), pointer | |
1153 | * to plaintext and ciphertext, asynchronous callback function, etc. It acts | |
1154 | * as a handle to the ablkcipher_request_* API calls in a similar way as | |
1155 | * ablkcipher handle to the crypto_ablkcipher_* API calls. | |
1156 | */ | |
1157 | ||
1158 | /** | |
1159 | * crypto_ablkcipher_reqsize() - obtain size of the request data structure | |
1160 | * @tfm: cipher handle | |
1161 | * | |
1162 | * Return: number of bytes | |
1163 | */ | |
b16c3a2e HX |
1164 | static inline unsigned int crypto_ablkcipher_reqsize( |
1165 | struct crypto_ablkcipher *tfm) | |
32e3983f HX |
1166 | { |
1167 | return crypto_ablkcipher_crt(tfm)->reqsize; | |
1168 | } | |
1169 | ||
f13ec330 SM |
1170 | /** |
1171 | * ablkcipher_request_set_tfm() - update cipher handle reference in request | |
1172 | * @req: request handle to be modified | |
1173 | * @tfm: cipher handle that shall be added to the request handle | |
1174 | * | |
1175 | * Allow the caller to replace the existing ablkcipher handle in the request | |
1176 | * data structure with a different one. | |
1177 | */ | |
e196d625 HX |
1178 | static inline void ablkcipher_request_set_tfm( |
1179 | struct ablkcipher_request *req, struct crypto_ablkcipher *tfm) | |
1180 | { | |
ecfc4329 | 1181 | req->base.tfm = crypto_ablkcipher_tfm(crypto_ablkcipher_crt(tfm)->base); |
e196d625 HX |
1182 | } |
1183 | ||
b5b7f088 HX |
1184 | static inline struct ablkcipher_request *ablkcipher_request_cast( |
1185 | struct crypto_async_request *req) | |
1186 | { | |
1187 | return container_of(req, struct ablkcipher_request, base); | |
1188 | } | |
1189 | ||
f13ec330 SM |
1190 | /** |
1191 | * ablkcipher_request_alloc() - allocate request data structure | |
1192 | * @tfm: cipher handle to be registered with the request | |
1193 | * @gfp: memory allocation flag that is handed to kmalloc by the API call. | |
1194 | * | |
1195 | * Allocate the request data structure that must be used with the ablkcipher | |
1196 | * encrypt and decrypt API calls. During the allocation, the provided ablkcipher | |
1197 | * handle is registered in the request data structure. | |
1198 | * | |
6eae29e7 | 1199 | * Return: allocated request handle in case of success, or NULL if out of memory |
f13ec330 | 1200 | */ |
32e3983f HX |
1201 | static inline struct ablkcipher_request *ablkcipher_request_alloc( |
1202 | struct crypto_ablkcipher *tfm, gfp_t gfp) | |
1203 | { | |
1204 | struct ablkcipher_request *req; | |
1205 | ||
1206 | req = kmalloc(sizeof(struct ablkcipher_request) + | |
1207 | crypto_ablkcipher_reqsize(tfm), gfp); | |
1208 | ||
1209 | if (likely(req)) | |
e196d625 | 1210 | ablkcipher_request_set_tfm(req, tfm); |
32e3983f HX |
1211 | |
1212 | return req; | |
1213 | } | |
1214 | ||
f13ec330 SM |
1215 | /** |
1216 | * ablkcipher_request_free() - zeroize and free request data structure | |
1217 | * @req: request data structure cipher handle to be freed | |
1218 | */ | |
32e3983f HX |
1219 | static inline void ablkcipher_request_free(struct ablkcipher_request *req) |
1220 | { | |
aef73cfc | 1221 | kzfree(req); |
32e3983f HX |
1222 | } |
1223 | ||
f13ec330 SM |
1224 | /** |
1225 | * ablkcipher_request_set_callback() - set asynchronous callback function | |
1226 | * @req: request handle | |
1227 | * @flags: specify zero or an ORing of the flags | |
0184cfe7 | 1228 | * CRYPTO_TFM_REQ_MAY_BACKLOG the request queue may back log and |
f13ec330 SM |
1229 | * increase the wait queue beyond the initial maximum size; |
1230 | * CRYPTO_TFM_REQ_MAY_SLEEP the request processing may sleep | |
1231 | * @compl: callback function pointer to be registered with the request handle | |
1232 | * @data: The data pointer refers to memory that is not used by the kernel | |
1233 | * crypto API, but provided to the callback function for it to use. Here, | |
1234 | * the caller can provide a reference to memory the callback function can | |
1235 | * operate on. As the callback function is invoked asynchronously to the | |
1236 | * related functionality, it may need to access data structures of the | |
1237 | * related functionality which can be referenced using this pointer. The | |
1238 | * callback function can access the memory via the "data" field in the | |
1239 | * crypto_async_request data structure provided to the callback function. | |
1240 | * | |
1241 | * This function allows setting the callback function that is triggered once the | |
1242 | * cipher operation completes. | |
1243 | * | |
1244 | * The callback function is registered with the ablkcipher_request handle and | |
0184cfe7 | 1245 | * must comply with the following template:: |
f13ec330 SM |
1246 | * |
1247 | * void callback_function(struct crypto_async_request *req, int error) | |
1248 | */ | |
32e3983f HX |
1249 | static inline void ablkcipher_request_set_callback( |
1250 | struct ablkcipher_request *req, | |
3e3dc25f | 1251 | u32 flags, crypto_completion_t compl, void *data) |
32e3983f | 1252 | { |
3e3dc25f | 1253 | req->base.complete = compl; |
32e3983f HX |
1254 | req->base.data = data; |
1255 | req->base.flags = flags; | |
1256 | } | |
1257 | ||
f13ec330 SM |
1258 | /** |
1259 | * ablkcipher_request_set_crypt() - set data buffers | |
1260 | * @req: request handle | |
1261 | * @src: source scatter / gather list | |
1262 | * @dst: destination scatter / gather list | |
1263 | * @nbytes: number of bytes to process from @src | |
1264 | * @iv: IV for the cipher operation which must comply with the IV size defined | |
1265 | * by crypto_ablkcipher_ivsize | |
1266 | * | |
1267 | * This function allows setting of the source data and destination data | |
1268 | * scatter / gather lists. | |
1269 | * | |
1270 | * For encryption, the source is treated as the plaintext and the | |
1271 | * destination is the ciphertext. For a decryption operation, the use is | |
379dcfb4 | 1272 | * reversed - the source is the ciphertext and the destination is the plaintext. |
f13ec330 | 1273 | */ |
32e3983f HX |
1274 | static inline void ablkcipher_request_set_crypt( |
1275 | struct ablkcipher_request *req, | |
1276 | struct scatterlist *src, struct scatterlist *dst, | |
1277 | unsigned int nbytes, void *iv) | |
1278 | { | |
1279 | req->src = src; | |
1280 | req->dst = dst; | |
1281 | req->nbytes = nbytes; | |
1282 | req->info = iv; | |
1283 | } | |
1284 | ||
58284f0d SM |
1285 | /** |
1286 | * DOC: Synchronous Block Cipher API | |
1287 | * | |
1288 | * The synchronous block cipher API is used with the ciphers of type | |
1289 | * CRYPTO_ALG_TYPE_BLKCIPHER (listed as type "blkcipher" in /proc/crypto) | |
1290 | * | |
1291 | * Synchronous calls, have a context in the tfm. But since a single tfm can be | |
1292 | * used in multiple calls and in parallel, this info should not be changeable | |
1293 | * (unless a lock is used). This applies, for example, to the symmetric key. | |
1294 | * However, the IV is changeable, so there is an iv field in blkcipher_tfm | |
1295 | * structure for synchronous blkcipher api. So, its the only state info that can | |
1296 | * be kept for synchronous calls without using a big lock across a tfm. | |
1297 | * | |
1298 | * The block cipher API allows the use of a complete cipher, i.e. a cipher | |
1299 | * consisting of a template (a block chaining mode) and a single block cipher | |
1300 | * primitive (e.g. AES). | |
1301 | * | |
1302 | * The plaintext data buffer and the ciphertext data buffer are pointed to | |
1303 | * by using scatter/gather lists. The cipher operation is performed | |
1304 | * on all segments of the provided scatter/gather lists. | |
1305 | * | |
1306 | * The kernel crypto API supports a cipher operation "in-place" which means that | |
1307 | * the caller may provide the same scatter/gather list for the plaintext and | |
1308 | * cipher text. After the completion of the cipher operation, the plaintext | |
1309 | * data is replaced with the ciphertext data in case of an encryption and vice | |
1310 | * versa for a decryption. The caller must ensure that the scatter/gather lists | |
1311 | * for the output data point to sufficiently large buffers, i.e. multiples of | |
1312 | * the block size of the cipher. | |
1313 | */ | |
1314 | ||
5cde0af2 HX |
1315 | static inline struct crypto_blkcipher *__crypto_blkcipher_cast( |
1316 | struct crypto_tfm *tfm) | |
1317 | { | |
1318 | return (struct crypto_blkcipher *)tfm; | |
1319 | } | |
1320 | ||
1321 | static inline struct crypto_blkcipher *crypto_blkcipher_cast( | |
1322 | struct crypto_tfm *tfm) | |
1323 | { | |
1324 | BUG_ON(crypto_tfm_alg_type(tfm) != CRYPTO_ALG_TYPE_BLKCIPHER); | |
1325 | return __crypto_blkcipher_cast(tfm); | |
1326 | } | |
1327 | ||
58284f0d SM |
1328 | /** |
1329 | * crypto_alloc_blkcipher() - allocate synchronous block cipher handle | |
1330 | * @alg_name: is the cra_name / name or cra_driver_name / driver name of the | |
1331 | * blkcipher cipher | |
1332 | * @type: specifies the type of the cipher | |
1333 | * @mask: specifies the mask for the cipher | |
1334 | * | |
1335 | * Allocate a cipher handle for a block cipher. The returned struct | |
1336 | * crypto_blkcipher is the cipher handle that is required for any subsequent | |
1337 | * API invocation for that block cipher. | |
1338 | * | |
1339 | * Return: allocated cipher handle in case of success; IS_ERR() is true in case | |
1340 | * of an error, PTR_ERR() returns the error code. | |
1341 | */ | |
5cde0af2 HX |
1342 | static inline struct crypto_blkcipher *crypto_alloc_blkcipher( |
1343 | const char *alg_name, u32 type, u32 mask) | |
1344 | { | |
332f8840 | 1345 | type &= ~CRYPTO_ALG_TYPE_MASK; |
5cde0af2 | 1346 | type |= CRYPTO_ALG_TYPE_BLKCIPHER; |
332f8840 | 1347 | mask |= CRYPTO_ALG_TYPE_MASK; |
5cde0af2 HX |
1348 | |
1349 | return __crypto_blkcipher_cast(crypto_alloc_base(alg_name, type, mask)); | |
1350 | } | |
1351 | ||
1352 | static inline struct crypto_tfm *crypto_blkcipher_tfm( | |
1353 | struct crypto_blkcipher *tfm) | |
1354 | { | |
1355 | return &tfm->base; | |
1356 | } | |
1357 | ||
58284f0d SM |
1358 | /** |
1359 | * crypto_free_blkcipher() - zeroize and free the block cipher handle | |
1360 | * @tfm: cipher handle to be freed | |
1361 | */ | |
5cde0af2 HX |
1362 | static inline void crypto_free_blkcipher(struct crypto_blkcipher *tfm) |
1363 | { | |
1364 | crypto_free_tfm(crypto_blkcipher_tfm(tfm)); | |
1365 | } | |
1366 | ||
58284f0d SM |
1367 | /** |
1368 | * crypto_has_blkcipher() - Search for the availability of a block cipher | |
1369 | * @alg_name: is the cra_name / name or cra_driver_name / driver name of the | |
1370 | * block cipher | |
1371 | * @type: specifies the type of the cipher | |
1372 | * @mask: specifies the mask for the cipher | |
1373 | * | |
1374 | * Return: true when the block cipher is known to the kernel crypto API; false | |
1375 | * otherwise | |
1376 | */ | |
fce32d70 HX |
1377 | static inline int crypto_has_blkcipher(const char *alg_name, u32 type, u32 mask) |
1378 | { | |
332f8840 | 1379 | type &= ~CRYPTO_ALG_TYPE_MASK; |
fce32d70 | 1380 | type |= CRYPTO_ALG_TYPE_BLKCIPHER; |
332f8840 | 1381 | mask |= CRYPTO_ALG_TYPE_MASK; |
fce32d70 HX |
1382 | |
1383 | return crypto_has_alg(alg_name, type, mask); | |
1384 | } | |
1385 | ||
58284f0d SM |
1386 | /** |
1387 | * crypto_blkcipher_name() - return the name / cra_name from the cipher handle | |
1388 | * @tfm: cipher handle | |
1389 | * | |
1390 | * Return: The character string holding the name of the cipher | |
1391 | */ | |
5cde0af2 HX |
1392 | static inline const char *crypto_blkcipher_name(struct crypto_blkcipher *tfm) |
1393 | { | |
1394 | return crypto_tfm_alg_name(crypto_blkcipher_tfm(tfm)); | |
1395 | } | |
1396 | ||
1397 | static inline struct blkcipher_tfm *crypto_blkcipher_crt( | |
1398 | struct crypto_blkcipher *tfm) | |
1399 | { | |
1400 | return &crypto_blkcipher_tfm(tfm)->crt_blkcipher; | |
1401 | } | |
1402 | ||
1403 | static inline struct blkcipher_alg *crypto_blkcipher_alg( | |
1404 | struct crypto_blkcipher *tfm) | |
1405 | { | |
1406 | return &crypto_blkcipher_tfm(tfm)->__crt_alg->cra_blkcipher; | |
1407 | } | |
1408 | ||
58284f0d SM |
1409 | /** |
1410 | * crypto_blkcipher_ivsize() - obtain IV size | |
1411 | * @tfm: cipher handle | |
1412 | * | |
1413 | * The size of the IV for the block cipher referenced by the cipher handle is | |
1414 | * returned. This IV size may be zero if the cipher does not need an IV. | |
1415 | * | |
1416 | * Return: IV size in bytes | |
1417 | */ | |
5cde0af2 HX |
1418 | static inline unsigned int crypto_blkcipher_ivsize(struct crypto_blkcipher *tfm) |
1419 | { | |
1420 | return crypto_blkcipher_alg(tfm)->ivsize; | |
1421 | } | |
1422 | ||
58284f0d SM |
1423 | /** |
1424 | * crypto_blkcipher_blocksize() - obtain block size of cipher | |
1425 | * @tfm: cipher handle | |
1426 | * | |
1427 | * The block size for the block cipher referenced with the cipher handle is | |
1428 | * returned. The caller may use that information to allocate appropriate | |
1429 | * memory for the data returned by the encryption or decryption operation. | |
1430 | * | |
1431 | * Return: block size of cipher | |
1432 | */ | |
5cde0af2 HX |
1433 | static inline unsigned int crypto_blkcipher_blocksize( |
1434 | struct crypto_blkcipher *tfm) | |
1435 | { | |
1436 | return crypto_tfm_alg_blocksize(crypto_blkcipher_tfm(tfm)); | |
1437 | } | |
1438 | ||
1439 | static inline unsigned int crypto_blkcipher_alignmask( | |
1440 | struct crypto_blkcipher *tfm) | |
1441 | { | |
1442 | return crypto_tfm_alg_alignmask(crypto_blkcipher_tfm(tfm)); | |
1443 | } | |
1444 | ||
1445 | static inline u32 crypto_blkcipher_get_flags(struct crypto_blkcipher *tfm) | |
1446 | { | |
1447 | return crypto_tfm_get_flags(crypto_blkcipher_tfm(tfm)); | |
1448 | } | |
1449 | ||
1450 | static inline void crypto_blkcipher_set_flags(struct crypto_blkcipher *tfm, | |
1451 | u32 flags) | |
1452 | { | |
1453 | crypto_tfm_set_flags(crypto_blkcipher_tfm(tfm), flags); | |
1454 | } | |
1455 | ||
1456 | static inline void crypto_blkcipher_clear_flags(struct crypto_blkcipher *tfm, | |
1457 | u32 flags) | |
1458 | { | |
1459 | crypto_tfm_clear_flags(crypto_blkcipher_tfm(tfm), flags); | |
1460 | } | |
1461 | ||
58284f0d SM |
1462 | /** |
1463 | * crypto_blkcipher_setkey() - set key for cipher | |
1464 | * @tfm: cipher handle | |
1465 | * @key: buffer holding the key | |
1466 | * @keylen: length of the key in bytes | |
1467 | * | |
1468 | * The caller provided key is set for the block cipher referenced by the cipher | |
1469 | * handle. | |
1470 | * | |
1471 | * Note, the key length determines the cipher type. Many block ciphers implement | |
1472 | * different cipher modes depending on the key size, such as AES-128 vs AES-192 | |
1473 | * vs. AES-256. When providing a 16 byte key for an AES cipher handle, AES-128 | |
1474 | * is performed. | |
1475 | * | |
1476 | * Return: 0 if the setting of the key was successful; < 0 if an error occurred | |
1477 | */ | |
5cde0af2 HX |
1478 | static inline int crypto_blkcipher_setkey(struct crypto_blkcipher *tfm, |
1479 | const u8 *key, unsigned int keylen) | |
1480 | { | |
1481 | return crypto_blkcipher_crt(tfm)->setkey(crypto_blkcipher_tfm(tfm), | |
1482 | key, keylen); | |
1483 | } | |
1484 | ||
58284f0d SM |
1485 | /** |
1486 | * crypto_blkcipher_encrypt() - encrypt plaintext | |
1487 | * @desc: reference to the block cipher handle with meta data | |
1488 | * @dst: scatter/gather list that is filled by the cipher operation with the | |
1489 | * ciphertext | |
1490 | * @src: scatter/gather list that holds the plaintext | |
1491 | * @nbytes: number of bytes of the plaintext to encrypt. | |
1492 | * | |
1493 | * Encrypt plaintext data using the IV set by the caller with a preceding | |
1494 | * call of crypto_blkcipher_set_iv. | |
1495 | * | |
1496 | * The blkcipher_desc data structure must be filled by the caller and can | |
1497 | * reside on the stack. The caller must fill desc as follows: desc.tfm is filled | |
1498 | * with the block cipher handle; desc.flags is filled with either | |
1499 | * CRYPTO_TFM_REQ_MAY_SLEEP or 0. | |
1500 | * | |
1501 | * Return: 0 if the cipher operation was successful; < 0 if an error occurred | |
1502 | */ | |
5cde0af2 HX |
1503 | static inline int crypto_blkcipher_encrypt(struct blkcipher_desc *desc, |
1504 | struct scatterlist *dst, | |
1505 | struct scatterlist *src, | |
1506 | unsigned int nbytes) | |
1507 | { | |
1508 | desc->info = crypto_blkcipher_crt(desc->tfm)->iv; | |
1509 | return crypto_blkcipher_crt(desc->tfm)->encrypt(desc, dst, src, nbytes); | |
1510 | } | |
1511 | ||
58284f0d SM |
1512 | /** |
1513 | * crypto_blkcipher_encrypt_iv() - encrypt plaintext with dedicated IV | |
1514 | * @desc: reference to the block cipher handle with meta data | |
1515 | * @dst: scatter/gather list that is filled by the cipher operation with the | |
1516 | * ciphertext | |
1517 | * @src: scatter/gather list that holds the plaintext | |
1518 | * @nbytes: number of bytes of the plaintext to encrypt. | |
1519 | * | |
1520 | * Encrypt plaintext data with the use of an IV that is solely used for this | |
1521 | * cipher operation. Any previously set IV is not used. | |
1522 | * | |
1523 | * The blkcipher_desc data structure must be filled by the caller and can | |
1524 | * reside on the stack. The caller must fill desc as follows: desc.tfm is filled | |
1525 | * with the block cipher handle; desc.info is filled with the IV to be used for | |
1526 | * the current operation; desc.flags is filled with either | |
1527 | * CRYPTO_TFM_REQ_MAY_SLEEP or 0. | |
1528 | * | |
1529 | * Return: 0 if the cipher operation was successful; < 0 if an error occurred | |
1530 | */ | |
5cde0af2 HX |
1531 | static inline int crypto_blkcipher_encrypt_iv(struct blkcipher_desc *desc, |
1532 | struct scatterlist *dst, | |
1533 | struct scatterlist *src, | |
1534 | unsigned int nbytes) | |
1535 | { | |
1536 | return crypto_blkcipher_crt(desc->tfm)->encrypt(desc, dst, src, nbytes); | |
1537 | } | |
1538 | ||
58284f0d SM |
1539 | /** |
1540 | * crypto_blkcipher_decrypt() - decrypt ciphertext | |
1541 | * @desc: reference to the block cipher handle with meta data | |
1542 | * @dst: scatter/gather list that is filled by the cipher operation with the | |
1543 | * plaintext | |
1544 | * @src: scatter/gather list that holds the ciphertext | |
1545 | * @nbytes: number of bytes of the ciphertext to decrypt. | |
1546 | * | |
1547 | * Decrypt ciphertext data using the IV set by the caller with a preceding | |
1548 | * call of crypto_blkcipher_set_iv. | |
1549 | * | |
1550 | * The blkcipher_desc data structure must be filled by the caller as documented | |
1551 | * for the crypto_blkcipher_encrypt call above. | |
1552 | * | |
1553 | * Return: 0 if the cipher operation was successful; < 0 if an error occurred | |
1554 | * | |
1555 | */ | |
5cde0af2 HX |
1556 | static inline int crypto_blkcipher_decrypt(struct blkcipher_desc *desc, |
1557 | struct scatterlist *dst, | |
1558 | struct scatterlist *src, | |
1559 | unsigned int nbytes) | |
1560 | { | |
1561 | desc->info = crypto_blkcipher_crt(desc->tfm)->iv; | |
1562 | return crypto_blkcipher_crt(desc->tfm)->decrypt(desc, dst, src, nbytes); | |
1563 | } | |
1564 | ||
58284f0d SM |
1565 | /** |
1566 | * crypto_blkcipher_decrypt_iv() - decrypt ciphertext with dedicated IV | |
1567 | * @desc: reference to the block cipher handle with meta data | |
1568 | * @dst: scatter/gather list that is filled by the cipher operation with the | |
1569 | * plaintext | |
1570 | * @src: scatter/gather list that holds the ciphertext | |
1571 | * @nbytes: number of bytes of the ciphertext to decrypt. | |
1572 | * | |
1573 | * Decrypt ciphertext data with the use of an IV that is solely used for this | |
1574 | * cipher operation. Any previously set IV is not used. | |
1575 | * | |
1576 | * The blkcipher_desc data structure must be filled by the caller as documented | |
1577 | * for the crypto_blkcipher_encrypt_iv call above. | |
1578 | * | |
1579 | * Return: 0 if the cipher operation was successful; < 0 if an error occurred | |
1580 | */ | |
5cde0af2 HX |
1581 | static inline int crypto_blkcipher_decrypt_iv(struct blkcipher_desc *desc, |
1582 | struct scatterlist *dst, | |
1583 | struct scatterlist *src, | |
1584 | unsigned int nbytes) | |
1585 | { | |
1586 | return crypto_blkcipher_crt(desc->tfm)->decrypt(desc, dst, src, nbytes); | |
1587 | } | |
1588 | ||
58284f0d SM |
1589 | /** |
1590 | * crypto_blkcipher_set_iv() - set IV for cipher | |
1591 | * @tfm: cipher handle | |
1592 | * @src: buffer holding the IV | |
1593 | * @len: length of the IV in bytes | |
1594 | * | |
1595 | * The caller provided IV is set for the block cipher referenced by the cipher | |
1596 | * handle. | |
1597 | */ | |
5cde0af2 HX |
1598 | static inline void crypto_blkcipher_set_iv(struct crypto_blkcipher *tfm, |
1599 | const u8 *src, unsigned int len) | |
1600 | { | |
1601 | memcpy(crypto_blkcipher_crt(tfm)->iv, src, len); | |
1602 | } | |
1603 | ||
58284f0d SM |
1604 | /** |
1605 | * crypto_blkcipher_get_iv() - obtain IV from cipher | |
1606 | * @tfm: cipher handle | |
1607 | * @dst: buffer filled with the IV | |
1608 | * @len: length of the buffer dst | |
1609 | * | |
1610 | * The caller can obtain the IV set for the block cipher referenced by the | |
1611 | * cipher handle and store it into the user-provided buffer. If the buffer | |
1612 | * has an insufficient space, the IV is truncated to fit the buffer. | |
1613 | */ | |
5cde0af2 HX |
1614 | static inline void crypto_blkcipher_get_iv(struct crypto_blkcipher *tfm, |
1615 | u8 *dst, unsigned int len) | |
1616 | { | |
1617 | memcpy(dst, crypto_blkcipher_crt(tfm)->iv, len); | |
1618 | } | |
1619 | ||
16e61030 SM |
1620 | /** |
1621 | * DOC: Single Block Cipher API | |
1622 | * | |
1623 | * The single block cipher API is used with the ciphers of type | |
1624 | * CRYPTO_ALG_TYPE_CIPHER (listed as type "cipher" in /proc/crypto). | |
1625 | * | |
1626 | * Using the single block cipher API calls, operations with the basic cipher | |
1627 | * primitive can be implemented. These cipher primitives exclude any block | |
1628 | * chaining operations including IV handling. | |
1629 | * | |
1630 | * The purpose of this single block cipher API is to support the implementation | |
1631 | * of templates or other concepts that only need to perform the cipher operation | |
1632 | * on one block at a time. Templates invoke the underlying cipher primitive | |
1633 | * block-wise and process either the input or the output data of these cipher | |
1634 | * operations. | |
1635 | */ | |
1636 | ||
f28776a3 HX |
1637 | static inline struct crypto_cipher *__crypto_cipher_cast(struct crypto_tfm *tfm) |
1638 | { | |
1639 | return (struct crypto_cipher *)tfm; | |
1640 | } | |
1641 | ||
1642 | static inline struct crypto_cipher *crypto_cipher_cast(struct crypto_tfm *tfm) | |
1643 | { | |
1644 | BUG_ON(crypto_tfm_alg_type(tfm) != CRYPTO_ALG_TYPE_CIPHER); | |
1645 | return __crypto_cipher_cast(tfm); | |
1646 | } | |
1647 | ||
16e61030 SM |
1648 | /** |
1649 | * crypto_alloc_cipher() - allocate single block cipher handle | |
1650 | * @alg_name: is the cra_name / name or cra_driver_name / driver name of the | |
1651 | * single block cipher | |
1652 | * @type: specifies the type of the cipher | |
1653 | * @mask: specifies the mask for the cipher | |
1654 | * | |
1655 | * Allocate a cipher handle for a single block cipher. The returned struct | |
1656 | * crypto_cipher is the cipher handle that is required for any subsequent API | |
1657 | * invocation for that single block cipher. | |
1658 | * | |
1659 | * Return: allocated cipher handle in case of success; IS_ERR() is true in case | |
1660 | * of an error, PTR_ERR() returns the error code. | |
1661 | */ | |
f28776a3 HX |
1662 | static inline struct crypto_cipher *crypto_alloc_cipher(const char *alg_name, |
1663 | u32 type, u32 mask) | |
1664 | { | |
1665 | type &= ~CRYPTO_ALG_TYPE_MASK; | |
1666 | type |= CRYPTO_ALG_TYPE_CIPHER; | |
1667 | mask |= CRYPTO_ALG_TYPE_MASK; | |
1668 | ||
1669 | return __crypto_cipher_cast(crypto_alloc_base(alg_name, type, mask)); | |
1670 | } | |
1671 | ||
1672 | static inline struct crypto_tfm *crypto_cipher_tfm(struct crypto_cipher *tfm) | |
1673 | { | |
78a1fe4f | 1674 | return &tfm->base; |
f28776a3 HX |
1675 | } |
1676 | ||
16e61030 SM |
1677 | /** |
1678 | * crypto_free_cipher() - zeroize and free the single block cipher handle | |
1679 | * @tfm: cipher handle to be freed | |
1680 | */ | |
f28776a3 HX |
1681 | static inline void crypto_free_cipher(struct crypto_cipher *tfm) |
1682 | { | |
1683 | crypto_free_tfm(crypto_cipher_tfm(tfm)); | |
1684 | } | |
1685 | ||
16e61030 SM |
1686 | /** |
1687 | * crypto_has_cipher() - Search for the availability of a single block cipher | |
1688 | * @alg_name: is the cra_name / name or cra_driver_name / driver name of the | |
1689 | * single block cipher | |
1690 | * @type: specifies the type of the cipher | |
1691 | * @mask: specifies the mask for the cipher | |
1692 | * | |
1693 | * Return: true when the single block cipher is known to the kernel crypto API; | |
1694 | * false otherwise | |
1695 | */ | |
fce32d70 HX |
1696 | static inline int crypto_has_cipher(const char *alg_name, u32 type, u32 mask) |
1697 | { | |
1698 | type &= ~CRYPTO_ALG_TYPE_MASK; | |
1699 | type |= CRYPTO_ALG_TYPE_CIPHER; | |
1700 | mask |= CRYPTO_ALG_TYPE_MASK; | |
1701 | ||
1702 | return crypto_has_alg(alg_name, type, mask); | |
1703 | } | |
1704 | ||
f28776a3 HX |
1705 | static inline struct cipher_tfm *crypto_cipher_crt(struct crypto_cipher *tfm) |
1706 | { | |
1707 | return &crypto_cipher_tfm(tfm)->crt_cipher; | |
1708 | } | |
1709 | ||
16e61030 SM |
1710 | /** |
1711 | * crypto_cipher_blocksize() - obtain block size for cipher | |
1712 | * @tfm: cipher handle | |
1713 | * | |
1714 | * The block size for the single block cipher referenced with the cipher handle | |
1715 | * tfm is returned. The caller may use that information to allocate appropriate | |
1716 | * memory for the data returned by the encryption or decryption operation | |
1717 | * | |
1718 | * Return: block size of cipher | |
1719 | */ | |
f28776a3 HX |
1720 | static inline unsigned int crypto_cipher_blocksize(struct crypto_cipher *tfm) |
1721 | { | |
1722 | return crypto_tfm_alg_blocksize(crypto_cipher_tfm(tfm)); | |
1723 | } | |
1724 | ||
1725 | static inline unsigned int crypto_cipher_alignmask(struct crypto_cipher *tfm) | |
1726 | { | |
1727 | return crypto_tfm_alg_alignmask(crypto_cipher_tfm(tfm)); | |
1728 | } | |
1729 | ||
1730 | static inline u32 crypto_cipher_get_flags(struct crypto_cipher *tfm) | |
1731 | { | |
1732 | return crypto_tfm_get_flags(crypto_cipher_tfm(tfm)); | |
1733 | } | |
1734 | ||
1735 | static inline void crypto_cipher_set_flags(struct crypto_cipher *tfm, | |
1736 | u32 flags) | |
1737 | { | |
1738 | crypto_tfm_set_flags(crypto_cipher_tfm(tfm), flags); | |
1739 | } | |
1740 | ||
1741 | static inline void crypto_cipher_clear_flags(struct crypto_cipher *tfm, | |
1742 | u32 flags) | |
1743 | { | |
1744 | crypto_tfm_clear_flags(crypto_cipher_tfm(tfm), flags); | |
1745 | } | |
1746 | ||
16e61030 SM |
1747 | /** |
1748 | * crypto_cipher_setkey() - set key for cipher | |
1749 | * @tfm: cipher handle | |
1750 | * @key: buffer holding the key | |
1751 | * @keylen: length of the key in bytes | |
1752 | * | |
1753 | * The caller provided key is set for the single block cipher referenced by the | |
1754 | * cipher handle. | |
1755 | * | |
1756 | * Note, the key length determines the cipher type. Many block ciphers implement | |
1757 | * different cipher modes depending on the key size, such as AES-128 vs AES-192 | |
1758 | * vs. AES-256. When providing a 16 byte key for an AES cipher handle, AES-128 | |
1759 | * is performed. | |
1760 | * | |
1761 | * Return: 0 if the setting of the key was successful; < 0 if an error occurred | |
1762 | */ | |
7226bc87 HX |
1763 | static inline int crypto_cipher_setkey(struct crypto_cipher *tfm, |
1764 | const u8 *key, unsigned int keylen) | |
1765 | { | |
1766 | return crypto_cipher_crt(tfm)->cit_setkey(crypto_cipher_tfm(tfm), | |
1767 | key, keylen); | |
1768 | } | |
1769 | ||
16e61030 SM |
1770 | /** |
1771 | * crypto_cipher_encrypt_one() - encrypt one block of plaintext | |
1772 | * @tfm: cipher handle | |
1773 | * @dst: points to the buffer that will be filled with the ciphertext | |
1774 | * @src: buffer holding the plaintext to be encrypted | |
1775 | * | |
1776 | * Invoke the encryption operation of one block. The caller must ensure that | |
1777 | * the plaintext and ciphertext buffers are at least one block in size. | |
1778 | */ | |
f28776a3 HX |
1779 | static inline void crypto_cipher_encrypt_one(struct crypto_cipher *tfm, |
1780 | u8 *dst, const u8 *src) | |
1781 | { | |
1782 | crypto_cipher_crt(tfm)->cit_encrypt_one(crypto_cipher_tfm(tfm), | |
1783 | dst, src); | |
1784 | } | |
1785 | ||
16e61030 SM |
1786 | /** |
1787 | * crypto_cipher_decrypt_one() - decrypt one block of ciphertext | |
1788 | * @tfm: cipher handle | |
1789 | * @dst: points to the buffer that will be filled with the plaintext | |
1790 | * @src: buffer holding the ciphertext to be decrypted | |
1791 | * | |
1792 | * Invoke the decryption operation of one block. The caller must ensure that | |
1793 | * the plaintext and ciphertext buffers are at least one block in size. | |
1794 | */ | |
f28776a3 HX |
1795 | static inline void crypto_cipher_decrypt_one(struct crypto_cipher *tfm, |
1796 | u8 *dst, const u8 *src) | |
1797 | { | |
1798 | crypto_cipher_crt(tfm)->cit_decrypt_one(crypto_cipher_tfm(tfm), | |
1799 | dst, src); | |
1800 | } | |
1801 | ||
fce32d70 HX |
1802 | static inline struct crypto_comp *__crypto_comp_cast(struct crypto_tfm *tfm) |
1803 | { | |
1804 | return (struct crypto_comp *)tfm; | |
1805 | } | |
1806 | ||
1807 | static inline struct crypto_comp *crypto_comp_cast(struct crypto_tfm *tfm) | |
1808 | { | |
1809 | BUG_ON((crypto_tfm_alg_type(tfm) ^ CRYPTO_ALG_TYPE_COMPRESS) & | |
1810 | CRYPTO_ALG_TYPE_MASK); | |
1811 | return __crypto_comp_cast(tfm); | |
1812 | } | |
1813 | ||
1814 | static inline struct crypto_comp *crypto_alloc_comp(const char *alg_name, | |
1815 | u32 type, u32 mask) | |
1816 | { | |
1817 | type &= ~CRYPTO_ALG_TYPE_MASK; | |
1818 | type |= CRYPTO_ALG_TYPE_COMPRESS; | |
1819 | mask |= CRYPTO_ALG_TYPE_MASK; | |
1820 | ||
1821 | return __crypto_comp_cast(crypto_alloc_base(alg_name, type, mask)); | |
1822 | } | |
1823 | ||
1824 | static inline struct crypto_tfm *crypto_comp_tfm(struct crypto_comp *tfm) | |
1825 | { | |
78a1fe4f | 1826 | return &tfm->base; |
fce32d70 HX |
1827 | } |
1828 | ||
1829 | static inline void crypto_free_comp(struct crypto_comp *tfm) | |
1830 | { | |
1831 | crypto_free_tfm(crypto_comp_tfm(tfm)); | |
1832 | } | |
1833 | ||
1834 | static inline int crypto_has_comp(const char *alg_name, u32 type, u32 mask) | |
1835 | { | |
1836 | type &= ~CRYPTO_ALG_TYPE_MASK; | |
1837 | type |= CRYPTO_ALG_TYPE_COMPRESS; | |
1838 | mask |= CRYPTO_ALG_TYPE_MASK; | |
1839 | ||
1840 | return crypto_has_alg(alg_name, type, mask); | |
1841 | } | |
1842 | ||
e4d5b79c HX |
1843 | static inline const char *crypto_comp_name(struct crypto_comp *tfm) |
1844 | { | |
1845 | return crypto_tfm_alg_name(crypto_comp_tfm(tfm)); | |
1846 | } | |
1847 | ||
fce32d70 HX |
1848 | static inline struct compress_tfm *crypto_comp_crt(struct crypto_comp *tfm) |
1849 | { | |
1850 | return &crypto_comp_tfm(tfm)->crt_compress; | |
1851 | } | |
1852 | ||
1853 | static inline int crypto_comp_compress(struct crypto_comp *tfm, | |
1da177e4 LT |
1854 | const u8 *src, unsigned int slen, |
1855 | u8 *dst, unsigned int *dlen) | |
1856 | { | |
78a1fe4f HX |
1857 | return crypto_comp_crt(tfm)->cot_compress(crypto_comp_tfm(tfm), |
1858 | src, slen, dst, dlen); | |
1da177e4 LT |
1859 | } |
1860 | ||
fce32d70 | 1861 | static inline int crypto_comp_decompress(struct crypto_comp *tfm, |
1da177e4 LT |
1862 | const u8 *src, unsigned int slen, |
1863 | u8 *dst, unsigned int *dlen) | |
1864 | { | |
78a1fe4f HX |
1865 | return crypto_comp_crt(tfm)->cot_decompress(crypto_comp_tfm(tfm), |
1866 | src, slen, dst, dlen); | |
1da177e4 LT |
1867 | } |
1868 | ||
1da177e4 LT |
1869 | #endif /* _LINUX_CRYPTO_H */ |
1870 |