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743edf57 HX |
1 | /* |
2 | * AEAD: Authenticated Encryption with Associated Data | |
3 | * | |
4 | * Copyright (c) 2007 Herbert Xu <herbert@gondor.apana.org.au> | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify it | |
7 | * under the terms of the GNU General Public License as published by the Free | |
8 | * Software Foundation; either version 2 of the License, or (at your option) | |
9 | * any later version. | |
10 | * | |
11 | */ | |
12 | ||
13 | #ifndef _CRYPTO_AEAD_H | |
14 | #define _CRYPTO_AEAD_H | |
15 | ||
16 | #include <linux/crypto.h> | |
17 | #include <linux/kernel.h> | |
3a282bd2 | 18 | #include <linux/slab.h> |
743edf57 | 19 | |
5d1d65f8 HX |
20 | /** |
21 | * DOC: Authenticated Encryption With Associated Data (AEAD) Cipher API | |
22 | * | |
23 | * The AEAD cipher API is used with the ciphers of type CRYPTO_ALG_TYPE_AEAD | |
24 | * (listed as type "aead" in /proc/crypto) | |
25 | * | |
26 | * The most prominent examples for this type of encryption is GCM and CCM. | |
27 | * However, the kernel supports other types of AEAD ciphers which are defined | |
28 | * with the following cipher string: | |
29 | * | |
30 | * authenc(keyed message digest, block cipher) | |
31 | * | |
32 | * For example: authenc(hmac(sha256), cbc(aes)) | |
33 | * | |
34 | * The example code provided for the asynchronous block cipher operation | |
35 | * applies here as well. Naturally all *ablkcipher* symbols must be exchanged | |
36 | * the *aead* pendants discussed in the following. In addtion, for the AEAD | |
37 | * operation, the aead_request_set_assoc function must be used to set the | |
38 | * pointer to the associated data memory location before performing the | |
39 | * encryption or decryption operation. In case of an encryption, the associated | |
40 | * data memory is filled during the encryption operation. For decryption, the | |
41 | * associated data memory must contain data that is used to verify the integrity | |
42 | * of the decrypted data. Another deviation from the asynchronous block cipher | |
43 | * operation is that the caller should explicitly check for -EBADMSG of the | |
44 | * crypto_aead_decrypt. That error indicates an authentication error, i.e. | |
45 | * a breach in the integrity of the message. In essence, that -EBADMSG error | |
46 | * code is the key bonus an AEAD cipher has over "standard" block chaining | |
47 | * modes. | |
48 | */ | |
49 | ||
50 | /** | |
51 | * struct aead_request - AEAD request | |
52 | * @base: Common attributes for async crypto requests | |
53 | * @assoclen: Length in bytes of associated data for authentication | |
54 | * @cryptlen: Length of data to be encrypted or decrypted | |
55 | * @iv: Initialisation vector | |
56 | * @assoc: Associated data | |
57 | * @src: Source data | |
58 | * @dst: Destination data | |
59 | * @__ctx: Start of private context data | |
60 | */ | |
61 | struct aead_request { | |
62 | struct crypto_async_request base; | |
63 | ||
996d98d8 HX |
64 | bool old; |
65 | ||
5d1d65f8 HX |
66 | unsigned int assoclen; |
67 | unsigned int cryptlen; | |
68 | ||
69 | u8 *iv; | |
70 | ||
71 | struct scatterlist *assoc; | |
72 | struct scatterlist *src; | |
73 | struct scatterlist *dst; | |
74 | ||
75 | void *__ctx[] CRYPTO_MINALIGN_ATTR; | |
76 | }; | |
77 | ||
743edf57 HX |
78 | /** |
79 | * struct aead_givcrypt_request - AEAD request with IV generation | |
80 | * @seq: Sequence number for IV generation | |
81 | * @giv: Space for generated IV | |
82 | * @areq: The AEAD request itself | |
83 | */ | |
84 | struct aead_givcrypt_request { | |
85 | u64 seq; | |
86 | u8 *giv; | |
87 | ||
88 | struct aead_request areq; | |
89 | }; | |
90 | ||
63293c61 HX |
91 | /** |
92 | * struct aead_alg - AEAD cipher definition | |
93 | * @maxauthsize: Set the maximum authentication tag size supported by the | |
94 | * transformation. A transformation may support smaller tag sizes. | |
95 | * As the authentication tag is a message digest to ensure the | |
96 | * integrity of the encrypted data, a consumer typically wants the | |
97 | * largest authentication tag possible as defined by this | |
98 | * variable. | |
99 | * @setauthsize: Set authentication size for the AEAD transformation. This | |
100 | * function is used to specify the consumer requested size of the | |
101 | * authentication tag to be either generated by the transformation | |
102 | * during encryption or the size of the authentication tag to be | |
103 | * supplied during the decryption operation. This function is also | |
104 | * responsible for checking the authentication tag size for | |
105 | * validity. | |
106 | * @setkey: see struct ablkcipher_alg | |
107 | * @encrypt: see struct ablkcipher_alg | |
108 | * @decrypt: see struct ablkcipher_alg | |
109 | * @geniv: see struct ablkcipher_alg | |
110 | * @ivsize: see struct ablkcipher_alg | |
111 | * | |
112 | * All fields except @ivsize is mandatory and must be filled. | |
113 | */ | |
114 | struct aead_alg { | |
115 | int (*setkey)(struct crypto_aead *tfm, const u8 *key, | |
116 | unsigned int keylen); | |
117 | int (*setauthsize)(struct crypto_aead *tfm, unsigned int authsize); | |
118 | int (*encrypt)(struct aead_request *req); | |
119 | int (*decrypt)(struct aead_request *req); | |
120 | ||
121 | const char *geniv; | |
122 | ||
123 | unsigned int ivsize; | |
124 | unsigned int maxauthsize; | |
125 | ||
126 | struct crypto_alg base; | |
127 | }; | |
128 | ||
5d1d65f8 | 129 | struct crypto_aead { |
63293c61 HX |
130 | int (*setkey)(struct crypto_aead *tfm, const u8 *key, |
131 | unsigned int keylen); | |
132 | int (*setauthsize)(struct crypto_aead *tfm, unsigned int authsize); | |
5d1d65f8 HX |
133 | int (*encrypt)(struct aead_request *req); |
134 | int (*decrypt)(struct aead_request *req); | |
135 | int (*givencrypt)(struct aead_givcrypt_request *req); | |
136 | int (*givdecrypt)(struct aead_givcrypt_request *req); | |
137 | ||
138 | struct crypto_aead *child; | |
139 | ||
5d1d65f8 HX |
140 | unsigned int authsize; |
141 | unsigned int reqsize; | |
142 | ||
143 | struct crypto_tfm base; | |
144 | }; | |
145 | ||
146 | static inline struct crypto_aead *__crypto_aead_cast(struct crypto_tfm *tfm) | |
147 | { | |
148 | return container_of(tfm, struct crypto_aead, base); | |
149 | } | |
150 | ||
151 | /** | |
152 | * crypto_alloc_aead() - allocate AEAD cipher handle | |
153 | * @alg_name: is the cra_name / name or cra_driver_name / driver name of the | |
154 | * AEAD cipher | |
155 | * @type: specifies the type of the cipher | |
156 | * @mask: specifies the mask for the cipher | |
157 | * | |
158 | * Allocate a cipher handle for an AEAD. The returned struct | |
159 | * crypto_aead is the cipher handle that is required for any subsequent | |
160 | * API invocation for that AEAD. | |
161 | * | |
162 | * Return: allocated cipher handle in case of success; IS_ERR() is true in case | |
163 | * of an error, PTR_ERR() returns the error code. | |
164 | */ | |
165 | struct crypto_aead *crypto_alloc_aead(const char *alg_name, u32 type, u32 mask); | |
166 | ||
167 | static inline struct crypto_tfm *crypto_aead_tfm(struct crypto_aead *tfm) | |
168 | { | |
169 | return &tfm->base; | |
170 | } | |
171 | ||
172 | /** | |
173 | * crypto_free_aead() - zeroize and free aead handle | |
174 | * @tfm: cipher handle to be freed | |
175 | */ | |
176 | static inline void crypto_free_aead(struct crypto_aead *tfm) | |
177 | { | |
178 | crypto_destroy_tfm(tfm, crypto_aead_tfm(tfm)); | |
179 | } | |
180 | ||
181 | static inline struct crypto_aead *crypto_aead_crt(struct crypto_aead *tfm) | |
182 | { | |
183 | return tfm; | |
184 | } | |
185 | ||
30e4c010 HX |
186 | static inline struct old_aead_alg *crypto_old_aead_alg(struct crypto_aead *tfm) |
187 | { | |
188 | return &crypto_aead_tfm(tfm)->__crt_alg->cra_aead; | |
189 | } | |
190 | ||
191 | static inline struct aead_alg *crypto_aead_alg(struct crypto_aead *tfm) | |
192 | { | |
193 | return container_of(crypto_aead_tfm(tfm)->__crt_alg, | |
194 | struct aead_alg, base); | |
195 | } | |
196 | ||
197 | static inline unsigned int crypto_aead_alg_ivsize(struct aead_alg *alg) | |
198 | { | |
199 | return alg->base.cra_aead.encrypt ? alg->base.cra_aead.ivsize : | |
200 | alg->ivsize; | |
201 | } | |
202 | ||
5d1d65f8 HX |
203 | /** |
204 | * crypto_aead_ivsize() - obtain IV size | |
205 | * @tfm: cipher handle | |
206 | * | |
207 | * The size of the IV for the aead referenced by the cipher handle is | |
208 | * returned. This IV size may be zero if the cipher does not need an IV. | |
209 | * | |
210 | * Return: IV size in bytes | |
211 | */ | |
212 | static inline unsigned int crypto_aead_ivsize(struct crypto_aead *tfm) | |
213 | { | |
30e4c010 | 214 | return crypto_aead_alg_ivsize(crypto_aead_alg(tfm)); |
5d1d65f8 HX |
215 | } |
216 | ||
217 | /** | |
218 | * crypto_aead_authsize() - obtain maximum authentication data size | |
219 | * @tfm: cipher handle | |
220 | * | |
221 | * The maximum size of the authentication data for the AEAD cipher referenced | |
222 | * by the AEAD cipher handle is returned. The authentication data size may be | |
223 | * zero if the cipher implements a hard-coded maximum. | |
224 | * | |
225 | * The authentication data may also be known as "tag value". | |
226 | * | |
227 | * Return: authentication data size / tag size in bytes | |
228 | */ | |
229 | static inline unsigned int crypto_aead_authsize(struct crypto_aead *tfm) | |
230 | { | |
231 | return tfm->authsize; | |
232 | } | |
233 | ||
234 | /** | |
235 | * crypto_aead_blocksize() - obtain block size of cipher | |
236 | * @tfm: cipher handle | |
237 | * | |
238 | * The block size for the AEAD referenced with the cipher handle is returned. | |
239 | * The caller may use that information to allocate appropriate memory for the | |
240 | * data returned by the encryption or decryption operation | |
241 | * | |
242 | * Return: block size of cipher | |
243 | */ | |
244 | static inline unsigned int crypto_aead_blocksize(struct crypto_aead *tfm) | |
245 | { | |
246 | return crypto_tfm_alg_blocksize(crypto_aead_tfm(tfm)); | |
247 | } | |
248 | ||
249 | static inline unsigned int crypto_aead_alignmask(struct crypto_aead *tfm) | |
250 | { | |
251 | return crypto_tfm_alg_alignmask(crypto_aead_tfm(tfm)); | |
252 | } | |
253 | ||
254 | static inline u32 crypto_aead_get_flags(struct crypto_aead *tfm) | |
255 | { | |
256 | return crypto_tfm_get_flags(crypto_aead_tfm(tfm)); | |
257 | } | |
258 | ||
259 | static inline void crypto_aead_set_flags(struct crypto_aead *tfm, u32 flags) | |
260 | { | |
261 | crypto_tfm_set_flags(crypto_aead_tfm(tfm), flags); | |
262 | } | |
263 | ||
264 | static inline void crypto_aead_clear_flags(struct crypto_aead *tfm, u32 flags) | |
265 | { | |
266 | crypto_tfm_clear_flags(crypto_aead_tfm(tfm), flags); | |
267 | } | |
268 | ||
269 | /** | |
270 | * crypto_aead_setkey() - set key for cipher | |
271 | * @tfm: cipher handle | |
272 | * @key: buffer holding the key | |
273 | * @keylen: length of the key in bytes | |
274 | * | |
275 | * The caller provided key is set for the AEAD referenced by the cipher | |
276 | * handle. | |
277 | * | |
278 | * Note, the key length determines the cipher type. Many block ciphers implement | |
279 | * different cipher modes depending on the key size, such as AES-128 vs AES-192 | |
280 | * vs. AES-256. When providing a 16 byte key for an AES cipher handle, AES-128 | |
281 | * is performed. | |
282 | * | |
283 | * Return: 0 if the setting of the key was successful; < 0 if an error occurred | |
284 | */ | |
285 | int crypto_aead_setkey(struct crypto_aead *tfm, | |
286 | const u8 *key, unsigned int keylen); | |
287 | ||
288 | /** | |
289 | * crypto_aead_setauthsize() - set authentication data size | |
290 | * @tfm: cipher handle | |
291 | * @authsize: size of the authentication data / tag in bytes | |
292 | * | |
293 | * Set the authentication data size / tag size. AEAD requires an authentication | |
294 | * tag (or MAC) in addition to the associated data. | |
295 | * | |
296 | * Return: 0 if the setting of the key was successful; < 0 if an error occurred | |
297 | */ | |
298 | int crypto_aead_setauthsize(struct crypto_aead *tfm, unsigned int authsize); | |
299 | ||
300 | static inline struct crypto_aead *crypto_aead_reqtfm(struct aead_request *req) | |
301 | { | |
302 | return __crypto_aead_cast(req->base.tfm); | |
303 | } | |
304 | ||
305 | /** | |
306 | * crypto_aead_encrypt() - encrypt plaintext | |
307 | * @req: reference to the aead_request handle that holds all information | |
308 | * needed to perform the cipher operation | |
309 | * | |
310 | * Encrypt plaintext data using the aead_request handle. That data structure | |
311 | * and how it is filled with data is discussed with the aead_request_* | |
312 | * functions. | |
313 | * | |
314 | * IMPORTANT NOTE The encryption operation creates the authentication data / | |
315 | * tag. That data is concatenated with the created ciphertext. | |
316 | * The ciphertext memory size is therefore the given number of | |
317 | * block cipher blocks + the size defined by the | |
318 | * crypto_aead_setauthsize invocation. The caller must ensure | |
319 | * that sufficient memory is available for the ciphertext and | |
320 | * the authentication tag. | |
321 | * | |
322 | * Return: 0 if the cipher operation was successful; < 0 if an error occurred | |
323 | */ | |
324 | static inline int crypto_aead_encrypt(struct aead_request *req) | |
325 | { | |
326 | return crypto_aead_reqtfm(req)->encrypt(req); | |
327 | } | |
328 | ||
329 | /** | |
330 | * crypto_aead_decrypt() - decrypt ciphertext | |
331 | * @req: reference to the ablkcipher_request handle that holds all information | |
332 | * needed to perform the cipher operation | |
333 | * | |
334 | * Decrypt ciphertext data using the aead_request handle. That data structure | |
335 | * and how it is filled with data is discussed with the aead_request_* | |
336 | * functions. | |
337 | * | |
338 | * IMPORTANT NOTE The caller must concatenate the ciphertext followed by the | |
339 | * authentication data / tag. That authentication data / tag | |
340 | * must have the size defined by the crypto_aead_setauthsize | |
341 | * invocation. | |
342 | * | |
343 | * | |
344 | * Return: 0 if the cipher operation was successful; -EBADMSG: The AEAD | |
345 | * cipher operation performs the authentication of the data during the | |
346 | * decryption operation. Therefore, the function returns this error if | |
347 | * the authentication of the ciphertext was unsuccessful (i.e. the | |
348 | * integrity of the ciphertext or the associated data was violated); | |
349 | * < 0 if an error occurred. | |
350 | */ | |
351 | static inline int crypto_aead_decrypt(struct aead_request *req) | |
352 | { | |
353 | if (req->cryptlen < crypto_aead_authsize(crypto_aead_reqtfm(req))) | |
354 | return -EINVAL; | |
355 | ||
356 | return crypto_aead_reqtfm(req)->decrypt(req); | |
357 | } | |
358 | ||
359 | /** | |
360 | * DOC: Asynchronous AEAD Request Handle | |
361 | * | |
362 | * The aead_request data structure contains all pointers to data required for | |
363 | * the AEAD cipher operation. This includes the cipher handle (which can be | |
364 | * used by multiple aead_request instances), pointer to plaintext and | |
365 | * ciphertext, asynchronous callback function, etc. It acts as a handle to the | |
366 | * aead_request_* API calls in a similar way as AEAD handle to the | |
367 | * crypto_aead_* API calls. | |
368 | */ | |
369 | ||
370 | /** | |
371 | * crypto_aead_reqsize() - obtain size of the request data structure | |
372 | * @tfm: cipher handle | |
373 | * | |
374 | * Return: number of bytes | |
375 | */ | |
996d98d8 | 376 | unsigned int crypto_aead_reqsize(struct crypto_aead *tfm); |
5d1d65f8 HX |
377 | |
378 | /** | |
379 | * aead_request_set_tfm() - update cipher handle reference in request | |
380 | * @req: request handle to be modified | |
381 | * @tfm: cipher handle that shall be added to the request handle | |
382 | * | |
383 | * Allow the caller to replace the existing aead handle in the request | |
384 | * data structure with a different one. | |
385 | */ | |
386 | static inline void aead_request_set_tfm(struct aead_request *req, | |
387 | struct crypto_aead *tfm) | |
388 | { | |
389 | req->base.tfm = crypto_aead_tfm(tfm->child); | |
390 | } | |
391 | ||
392 | /** | |
393 | * aead_request_alloc() - allocate request data structure | |
394 | * @tfm: cipher handle to be registered with the request | |
395 | * @gfp: memory allocation flag that is handed to kmalloc by the API call. | |
396 | * | |
397 | * Allocate the request data structure that must be used with the AEAD | |
398 | * encrypt and decrypt API calls. During the allocation, the provided aead | |
399 | * handle is registered in the request data structure. | |
400 | * | |
401 | * Return: allocated request handle in case of success; IS_ERR() is true in case | |
402 | * of an error, PTR_ERR() returns the error code. | |
403 | */ | |
404 | static inline struct aead_request *aead_request_alloc(struct crypto_aead *tfm, | |
405 | gfp_t gfp) | |
406 | { | |
407 | struct aead_request *req; | |
408 | ||
409 | req = kmalloc(sizeof(*req) + crypto_aead_reqsize(tfm), gfp); | |
410 | ||
411 | if (likely(req)) | |
412 | aead_request_set_tfm(req, tfm); | |
413 | ||
414 | return req; | |
415 | } | |
416 | ||
417 | /** | |
418 | * aead_request_free() - zeroize and free request data structure | |
419 | * @req: request data structure cipher handle to be freed | |
420 | */ | |
421 | static inline void aead_request_free(struct aead_request *req) | |
422 | { | |
423 | kzfree(req); | |
424 | } | |
425 | ||
426 | /** | |
427 | * aead_request_set_callback() - set asynchronous callback function | |
428 | * @req: request handle | |
429 | * @flags: specify zero or an ORing of the flags | |
430 | * CRYPTO_TFM_REQ_MAY_BACKLOG the request queue may back log and | |
431 | * increase the wait queue beyond the initial maximum size; | |
432 | * CRYPTO_TFM_REQ_MAY_SLEEP the request processing may sleep | |
433 | * @compl: callback function pointer to be registered with the request handle | |
434 | * @data: The data pointer refers to memory that is not used by the kernel | |
435 | * crypto API, but provided to the callback function for it to use. Here, | |
436 | * the caller can provide a reference to memory the callback function can | |
437 | * operate on. As the callback function is invoked asynchronously to the | |
438 | * related functionality, it may need to access data structures of the | |
439 | * related functionality which can be referenced using this pointer. The | |
440 | * callback function can access the memory via the "data" field in the | |
441 | * crypto_async_request data structure provided to the callback function. | |
442 | * | |
443 | * Setting the callback function that is triggered once the cipher operation | |
444 | * completes | |
445 | * | |
446 | * The callback function is registered with the aead_request handle and | |
447 | * must comply with the following template | |
448 | * | |
449 | * void callback_function(struct crypto_async_request *req, int error) | |
450 | */ | |
451 | static inline void aead_request_set_callback(struct aead_request *req, | |
452 | u32 flags, | |
453 | crypto_completion_t compl, | |
454 | void *data) | |
455 | { | |
456 | req->base.complete = compl; | |
457 | req->base.data = data; | |
458 | req->base.flags = flags; | |
459 | } | |
460 | ||
461 | /** | |
462 | * aead_request_set_crypt - set data buffers | |
463 | * @req: request handle | |
464 | * @src: source scatter / gather list | |
465 | * @dst: destination scatter / gather list | |
466 | * @cryptlen: number of bytes to process from @src | |
467 | * @iv: IV for the cipher operation which must comply with the IV size defined | |
468 | * by crypto_aead_ivsize() | |
469 | * | |
470 | * Setting the source data and destination data scatter / gather lists. | |
471 | * | |
472 | * For encryption, the source is treated as the plaintext and the | |
473 | * destination is the ciphertext. For a decryption operation, the use is | |
474 | * reversed - the source is the ciphertext and the destination is the plaintext. | |
475 | * | |
996d98d8 HX |
476 | * For both src/dst the layout is associated data, skipped data, |
477 | * plain/cipher text, authentication tag. | |
478 | * | |
5d1d65f8 HX |
479 | * IMPORTANT NOTE AEAD requires an authentication tag (MAC). For decryption, |
480 | * the caller must concatenate the ciphertext followed by the | |
481 | * authentication tag and provide the entire data stream to the | |
482 | * decryption operation (i.e. the data length used for the | |
483 | * initialization of the scatterlist and the data length for the | |
484 | * decryption operation is identical). For encryption, however, | |
485 | * the authentication tag is created while encrypting the data. | |
486 | * The destination buffer must hold sufficient space for the | |
487 | * ciphertext and the authentication tag while the encryption | |
488 | * invocation must only point to the plaintext data size. The | |
489 | * following code snippet illustrates the memory usage | |
490 | * buffer = kmalloc(ptbuflen + (enc ? authsize : 0)); | |
491 | * sg_init_one(&sg, buffer, ptbuflen + (enc ? authsize : 0)); | |
492 | * aead_request_set_crypt(req, &sg, &sg, ptbuflen, iv); | |
493 | */ | |
494 | static inline void aead_request_set_crypt(struct aead_request *req, | |
495 | struct scatterlist *src, | |
496 | struct scatterlist *dst, | |
497 | unsigned int cryptlen, u8 *iv) | |
498 | { | |
499 | req->src = src; | |
500 | req->dst = dst; | |
501 | req->cryptlen = cryptlen; | |
502 | req->iv = iv; | |
503 | } | |
504 | ||
505 | /** | |
506 | * aead_request_set_assoc() - set the associated data scatter / gather list | |
507 | * @req: request handle | |
508 | * @assoc: associated data scatter / gather list | |
509 | * @assoclen: number of bytes to process from @assoc | |
510 | * | |
996d98d8 | 511 | * Obsolete, do not use. |
5d1d65f8 HX |
512 | */ |
513 | static inline void aead_request_set_assoc(struct aead_request *req, | |
514 | struct scatterlist *assoc, | |
515 | unsigned int assoclen) | |
516 | { | |
517 | req->assoc = assoc; | |
518 | req->assoclen = assoclen; | |
996d98d8 HX |
519 | req->old = true; |
520 | } | |
521 | ||
522 | /** | |
523 | * aead_request_set_ad - set associated data information | |
524 | * @req: request handle | |
525 | * @assoclen: number of bytes in associated data | |
996d98d8 HX |
526 | * |
527 | * Setting the AD information. This function sets the length of | |
528 | * the associated data and the number of bytes to skip after it to | |
529 | * access the plain/cipher text. | |
530 | */ | |
531 | static inline void aead_request_set_ad(struct aead_request *req, | |
374d4ad1 | 532 | unsigned int assoclen) |
996d98d8 HX |
533 | { |
534 | req->assoclen = assoclen; | |
996d98d8 | 535 | req->old = false; |
5d1d65f8 HX |
536 | } |
537 | ||
743edf57 HX |
538 | static inline struct crypto_aead *aead_givcrypt_reqtfm( |
539 | struct aead_givcrypt_request *req) | |
540 | { | |
541 | return crypto_aead_reqtfm(&req->areq); | |
542 | } | |
543 | ||
3a282bd2 HX |
544 | static inline int crypto_aead_givencrypt(struct aead_givcrypt_request *req) |
545 | { | |
5d1d65f8 | 546 | return aead_givcrypt_reqtfm(req)->givencrypt(req); |
3a282bd2 HX |
547 | }; |
548 | ||
549 | static inline int crypto_aead_givdecrypt(struct aead_givcrypt_request *req) | |
550 | { | |
5d1d65f8 | 551 | return aead_givcrypt_reqtfm(req)->givdecrypt(req); |
3a282bd2 HX |
552 | }; |
553 | ||
554 | static inline void aead_givcrypt_set_tfm(struct aead_givcrypt_request *req, | |
555 | struct crypto_aead *tfm) | |
556 | { | |
557 | req->areq.base.tfm = crypto_aead_tfm(tfm); | |
558 | } | |
559 | ||
560 | static inline struct aead_givcrypt_request *aead_givcrypt_alloc( | |
561 | struct crypto_aead *tfm, gfp_t gfp) | |
562 | { | |
563 | struct aead_givcrypt_request *req; | |
564 | ||
565 | req = kmalloc(sizeof(struct aead_givcrypt_request) + | |
566 | crypto_aead_reqsize(tfm), gfp); | |
567 | ||
568 | if (likely(req)) | |
569 | aead_givcrypt_set_tfm(req, tfm); | |
570 | ||
571 | return req; | |
572 | } | |
573 | ||
574 | static inline void aead_givcrypt_free(struct aead_givcrypt_request *req) | |
575 | { | |
576 | kfree(req); | |
577 | } | |
578 | ||
579 | static inline void aead_givcrypt_set_callback( | |
580 | struct aead_givcrypt_request *req, u32 flags, | |
3e3dc25f | 581 | crypto_completion_t compl, void *data) |
3a282bd2 | 582 | { |
3e3dc25f | 583 | aead_request_set_callback(&req->areq, flags, compl, data); |
3a282bd2 HX |
584 | } |
585 | ||
586 | static inline void aead_givcrypt_set_crypt(struct aead_givcrypt_request *req, | |
587 | struct scatterlist *src, | |
588 | struct scatterlist *dst, | |
589 | unsigned int nbytes, void *iv) | |
590 | { | |
591 | aead_request_set_crypt(&req->areq, src, dst, nbytes, iv); | |
592 | } | |
593 | ||
594 | static inline void aead_givcrypt_set_assoc(struct aead_givcrypt_request *req, | |
595 | struct scatterlist *assoc, | |
596 | unsigned int assoclen) | |
597 | { | |
598 | aead_request_set_assoc(&req->areq, assoc, assoclen); | |
599 | } | |
600 | ||
601 | static inline void aead_givcrypt_set_giv(struct aead_givcrypt_request *req, | |
602 | u8 *giv, u64 seq) | |
603 | { | |
604 | req->giv = giv; | |
605 | req->seq = seq; | |
606 | } | |
607 | ||
743edf57 | 608 | #endif /* _CRYPTO_AEAD_H */ |