Commit | Line | Data |
---|---|---|
004a403c LH |
1 | /* |
2 | * Asynchronous Cryptographic Hash operations. | |
3 | * | |
4 | * This is the asynchronous version of hash.c with notification of | |
5 | * completion via a callback. | |
6 | * | |
7 | * Copyright (c) 2008 Loc Ho <lho@amcc.com> | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify it | |
10 | * under the terms of the GNU General Public License as published by the Free | |
11 | * Software Foundation; either version 2 of the License, or (at your option) | |
12 | * any later version. | |
13 | * | |
14 | */ | |
15 | ||
20036252 HX |
16 | #include <crypto/internal/hash.h> |
17 | #include <crypto/scatterwalk.h> | |
004a403c LH |
18 | #include <linux/err.h> |
19 | #include <linux/kernel.h> | |
20 | #include <linux/module.h> | |
21 | #include <linux/sched.h> | |
22 | #include <linux/slab.h> | |
23 | #include <linux/seq_file.h> | |
6238cbae SK |
24 | #include <linux/cryptouser.h> |
25 | #include <net/netlink.h> | |
004a403c LH |
26 | |
27 | #include "internal.h" | |
28 | ||
66f6ce5e HX |
29 | struct ahash_request_priv { |
30 | crypto_completion_t complete; | |
31 | void *data; | |
32 | u8 *result; | |
33 | void *ubuf[] CRYPTO_MINALIGN_ATTR; | |
34 | }; | |
35 | ||
88056ec3 HX |
36 | static inline struct ahash_alg *crypto_ahash_alg(struct crypto_ahash *hash) |
37 | { | |
38 | return container_of(crypto_hash_alg_common(hash), struct ahash_alg, | |
39 | halg); | |
40 | } | |
41 | ||
20036252 HX |
42 | static int hash_walk_next(struct crypto_hash_walk *walk) |
43 | { | |
44 | unsigned int alignmask = walk->alignmask; | |
45 | unsigned int offset = walk->offset; | |
46 | unsigned int nbytes = min(walk->entrylen, | |
47 | ((unsigned int)(PAGE_SIZE)) - offset); | |
48 | ||
f0dfc0b0 | 49 | walk->data = kmap_atomic(walk->pg); |
20036252 HX |
50 | walk->data += offset; |
51 | ||
23a75eee SÖ |
52 | if (offset & alignmask) { |
53 | unsigned int unaligned = alignmask + 1 - (offset & alignmask); | |
54 | if (nbytes > unaligned) | |
55 | nbytes = unaligned; | |
56 | } | |
20036252 HX |
57 | |
58 | walk->entrylen -= nbytes; | |
59 | return nbytes; | |
60 | } | |
61 | ||
62 | static int hash_walk_new_entry(struct crypto_hash_walk *walk) | |
63 | { | |
64 | struct scatterlist *sg; | |
65 | ||
66 | sg = walk->sg; | |
67 | walk->pg = sg_page(sg); | |
68 | walk->offset = sg->offset; | |
69 | walk->entrylen = sg->length; | |
70 | ||
71 | if (walk->entrylen > walk->total) | |
72 | walk->entrylen = walk->total; | |
73 | walk->total -= walk->entrylen; | |
74 | ||
75 | return hash_walk_next(walk); | |
76 | } | |
77 | ||
78 | int crypto_hash_walk_done(struct crypto_hash_walk *walk, int err) | |
79 | { | |
80 | unsigned int alignmask = walk->alignmask; | |
81 | unsigned int nbytes = walk->entrylen; | |
82 | ||
83 | walk->data -= walk->offset; | |
84 | ||
85 | if (nbytes && walk->offset & alignmask && !err) { | |
20036252 HX |
86 | walk->offset = ALIGN(walk->offset, alignmask + 1); |
87 | walk->data += walk->offset; | |
88 | ||
89 | nbytes = min(nbytes, | |
90 | ((unsigned int)(PAGE_SIZE)) - walk->offset); | |
91 | walk->entrylen -= nbytes; | |
92 | ||
93 | return nbytes; | |
94 | } | |
95 | ||
f0dfc0b0 | 96 | kunmap_atomic(walk->data); |
20036252 HX |
97 | crypto_yield(walk->flags); |
98 | ||
99 | if (err) | |
100 | return err; | |
101 | ||
d315a0e0 HX |
102 | if (nbytes) { |
103 | walk->offset = 0; | |
104 | walk->pg++; | |
20036252 | 105 | return hash_walk_next(walk); |
d315a0e0 | 106 | } |
20036252 HX |
107 | |
108 | if (!walk->total) | |
109 | return 0; | |
110 | ||
111 | walk->sg = scatterwalk_sg_next(walk->sg); | |
112 | ||
113 | return hash_walk_new_entry(walk); | |
114 | } | |
115 | EXPORT_SYMBOL_GPL(crypto_hash_walk_done); | |
116 | ||
117 | int crypto_hash_walk_first(struct ahash_request *req, | |
118 | struct crypto_hash_walk *walk) | |
119 | { | |
120 | walk->total = req->nbytes; | |
121 | ||
122 | if (!walk->total) | |
123 | return 0; | |
124 | ||
125 | walk->alignmask = crypto_ahash_alignmask(crypto_ahash_reqtfm(req)); | |
126 | walk->sg = req->src; | |
127 | walk->flags = req->base.flags; | |
128 | ||
129 | return hash_walk_new_entry(walk); | |
130 | } | |
131 | EXPORT_SYMBOL_GPL(crypto_hash_walk_first); | |
132 | ||
5f7082ed HX |
133 | int crypto_hash_walk_first_compat(struct hash_desc *hdesc, |
134 | struct crypto_hash_walk *walk, | |
135 | struct scatterlist *sg, unsigned int len) | |
136 | { | |
137 | walk->total = len; | |
138 | ||
139 | if (!walk->total) | |
140 | return 0; | |
141 | ||
142 | walk->alignmask = crypto_hash_alignmask(hdesc->tfm); | |
143 | walk->sg = sg; | |
144 | walk->flags = hdesc->flags; | |
145 | ||
146 | return hash_walk_new_entry(walk); | |
147 | } | |
148 | ||
004a403c LH |
149 | static int ahash_setkey_unaligned(struct crypto_ahash *tfm, const u8 *key, |
150 | unsigned int keylen) | |
151 | { | |
004a403c LH |
152 | unsigned long alignmask = crypto_ahash_alignmask(tfm); |
153 | int ret; | |
154 | u8 *buffer, *alignbuffer; | |
155 | unsigned long absize; | |
156 | ||
157 | absize = keylen + alignmask; | |
093900c2 | 158 | buffer = kmalloc(absize, GFP_KERNEL); |
004a403c LH |
159 | if (!buffer) |
160 | return -ENOMEM; | |
161 | ||
162 | alignbuffer = (u8 *)ALIGN((unsigned long)buffer, alignmask + 1); | |
163 | memcpy(alignbuffer, key, keylen); | |
a70c5225 | 164 | ret = tfm->setkey(tfm, alignbuffer, keylen); |
8c32c516 | 165 | kzfree(buffer); |
004a403c LH |
166 | return ret; |
167 | } | |
168 | ||
66f6ce5e | 169 | int crypto_ahash_setkey(struct crypto_ahash *tfm, const u8 *key, |
004a403c LH |
170 | unsigned int keylen) |
171 | { | |
004a403c LH |
172 | unsigned long alignmask = crypto_ahash_alignmask(tfm); |
173 | ||
174 | if ((unsigned long)key & alignmask) | |
175 | return ahash_setkey_unaligned(tfm, key, keylen); | |
176 | ||
a70c5225 | 177 | return tfm->setkey(tfm, key, keylen); |
004a403c | 178 | } |
66f6ce5e | 179 | EXPORT_SYMBOL_GPL(crypto_ahash_setkey); |
004a403c | 180 | |
3751f402 HX |
181 | static int ahash_nosetkey(struct crypto_ahash *tfm, const u8 *key, |
182 | unsigned int keylen) | |
183 | { | |
184 | return -ENOSYS; | |
185 | } | |
186 | ||
66f6ce5e HX |
187 | static inline unsigned int ahash_align_buffer_size(unsigned len, |
188 | unsigned long mask) | |
189 | { | |
190 | return len + (mask & ~(crypto_tfm_ctx_alignment() - 1)); | |
191 | } | |
192 | ||
1ffc9fbd | 193 | static int ahash_save_req(struct ahash_request *req, crypto_completion_t cplt) |
66f6ce5e HX |
194 | { |
195 | struct crypto_ahash *tfm = crypto_ahash_reqtfm(req); | |
196 | unsigned long alignmask = crypto_ahash_alignmask(tfm); | |
197 | unsigned int ds = crypto_ahash_digestsize(tfm); | |
198 | struct ahash_request_priv *priv; | |
66f6ce5e HX |
199 | |
200 | priv = kmalloc(sizeof(*priv) + ahash_align_buffer_size(ds, alignmask), | |
201 | (req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP) ? | |
5befbd5a | 202 | GFP_KERNEL : GFP_ATOMIC); |
66f6ce5e HX |
203 | if (!priv) |
204 | return -ENOMEM; | |
205 | ||
ab6bf4e5 MV |
206 | /* |
207 | * WARNING: Voodoo programming below! | |
208 | * | |
209 | * The code below is obscure and hard to understand, thus explanation | |
210 | * is necessary. See include/crypto/hash.h and include/linux/crypto.h | |
211 | * to understand the layout of structures used here! | |
212 | * | |
213 | * The code here will replace portions of the ORIGINAL request with | |
214 | * pointers to new code and buffers so the hashing operation can store | |
215 | * the result in aligned buffer. We will call the modified request | |
216 | * an ADJUSTED request. | |
217 | * | |
218 | * The newly mangled request will look as such: | |
219 | * | |
220 | * req { | |
221 | * .result = ADJUSTED[new aligned buffer] | |
222 | * .base.complete = ADJUSTED[pointer to completion function] | |
223 | * .base.data = ADJUSTED[*req (pointer to self)] | |
224 | * .priv = ADJUSTED[new priv] { | |
225 | * .result = ORIGINAL(result) | |
226 | * .complete = ORIGINAL(base.complete) | |
227 | * .data = ORIGINAL(base.data) | |
228 | * } | |
229 | */ | |
230 | ||
66f6ce5e HX |
231 | priv->result = req->result; |
232 | priv->complete = req->base.complete; | |
233 | priv->data = req->base.data; | |
ab6bf4e5 MV |
234 | /* |
235 | * WARNING: We do not backup req->priv here! The req->priv | |
236 | * is for internal use of the Crypto API and the | |
237 | * user must _NOT_ _EVER_ depend on it's content! | |
238 | */ | |
66f6ce5e HX |
239 | |
240 | req->result = PTR_ALIGN((u8 *)priv->ubuf, alignmask + 1); | |
1ffc9fbd | 241 | req->base.complete = cplt; |
66f6ce5e HX |
242 | req->base.data = req; |
243 | req->priv = priv; | |
244 | ||
1ffc9fbd MV |
245 | return 0; |
246 | } | |
247 | ||
248 | static void ahash_restore_req(struct ahash_request *req) | |
249 | { | |
250 | struct ahash_request_priv *priv = req->priv; | |
251 | ||
252 | /* Restore the original crypto request. */ | |
253 | req->result = priv->result; | |
254 | req->base.complete = priv->complete; | |
255 | req->base.data = priv->data; | |
256 | req->priv = NULL; | |
257 | ||
258 | /* Free the req->priv.priv from the ADJUSTED request. */ | |
259 | kzfree(priv); | |
260 | } | |
261 | ||
262 | static void ahash_op_unaligned_finish(struct ahash_request *req, int err) | |
263 | { | |
264 | struct ahash_request_priv *priv = req->priv; | |
265 | ||
266 | if (err == -EINPROGRESS) | |
267 | return; | |
268 | ||
269 | if (!err) | |
270 | memcpy(priv->result, req->result, | |
271 | crypto_ahash_digestsize(crypto_ahash_reqtfm(req))); | |
272 | ||
273 | ahash_restore_req(req); | |
274 | } | |
275 | ||
276 | static void ahash_op_unaligned_done(struct crypto_async_request *req, int err) | |
277 | { | |
278 | struct ahash_request *areq = req->data; | |
279 | ||
280 | /* | |
281 | * Restore the original request, see ahash_op_unaligned() for what | |
282 | * goes where. | |
283 | * | |
284 | * The "struct ahash_request *req" here is in fact the "req.base" | |
285 | * from the ADJUSTED request from ahash_op_unaligned(), thus as it | |
286 | * is a pointer to self, it is also the ADJUSTED "req" . | |
287 | */ | |
288 | ||
289 | /* First copy req->result into req->priv.result */ | |
290 | ahash_op_unaligned_finish(areq, err); | |
291 | ||
292 | /* Complete the ORIGINAL request. */ | |
293 | areq->base.complete(&areq->base, err); | |
294 | } | |
295 | ||
296 | static int ahash_op_unaligned(struct ahash_request *req, | |
297 | int (*op)(struct ahash_request *)) | |
298 | { | |
299 | int err; | |
300 | ||
301 | err = ahash_save_req(req, ahash_op_unaligned_done); | |
302 | if (err) | |
303 | return err; | |
304 | ||
66f6ce5e HX |
305 | err = op(req); |
306 | ahash_op_unaligned_finish(req, err); | |
307 | ||
308 | return err; | |
309 | } | |
310 | ||
311 | static int crypto_ahash_op(struct ahash_request *req, | |
312 | int (*op)(struct ahash_request *)) | |
313 | { | |
314 | struct crypto_ahash *tfm = crypto_ahash_reqtfm(req); | |
315 | unsigned long alignmask = crypto_ahash_alignmask(tfm); | |
316 | ||
317 | if ((unsigned long)req->result & alignmask) | |
318 | return ahash_op_unaligned(req, op); | |
319 | ||
320 | return op(req); | |
321 | } | |
322 | ||
323 | int crypto_ahash_final(struct ahash_request *req) | |
324 | { | |
325 | return crypto_ahash_op(req, crypto_ahash_reqtfm(req)->final); | |
326 | } | |
327 | EXPORT_SYMBOL_GPL(crypto_ahash_final); | |
328 | ||
329 | int crypto_ahash_finup(struct ahash_request *req) | |
330 | { | |
331 | return crypto_ahash_op(req, crypto_ahash_reqtfm(req)->finup); | |
332 | } | |
333 | EXPORT_SYMBOL_GPL(crypto_ahash_finup); | |
334 | ||
335 | int crypto_ahash_digest(struct ahash_request *req) | |
336 | { | |
337 | return crypto_ahash_op(req, crypto_ahash_reqtfm(req)->digest); | |
338 | } | |
339 | EXPORT_SYMBOL_GPL(crypto_ahash_digest); | |
340 | ||
341 | static void ahash_def_finup_finish2(struct ahash_request *req, int err) | |
342 | { | |
343 | struct ahash_request_priv *priv = req->priv; | |
344 | ||
345 | if (err == -EINPROGRESS) | |
346 | return; | |
347 | ||
348 | if (!err) | |
349 | memcpy(priv->result, req->result, | |
350 | crypto_ahash_digestsize(crypto_ahash_reqtfm(req))); | |
351 | ||
d4a7a0fb | 352 | ahash_restore_req(req); |
66f6ce5e HX |
353 | } |
354 | ||
355 | static void ahash_def_finup_done2(struct crypto_async_request *req, int err) | |
356 | { | |
357 | struct ahash_request *areq = req->data; | |
66f6ce5e HX |
358 | |
359 | ahash_def_finup_finish2(areq, err); | |
360 | ||
d4a7a0fb | 361 | areq->base.complete(&areq->base, err); |
66f6ce5e HX |
362 | } |
363 | ||
364 | static int ahash_def_finup_finish1(struct ahash_request *req, int err) | |
365 | { | |
366 | if (err) | |
367 | goto out; | |
368 | ||
369 | req->base.complete = ahash_def_finup_done2; | |
370 | req->base.flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP; | |
371 | err = crypto_ahash_reqtfm(req)->final(req); | |
372 | ||
373 | out: | |
374 | ahash_def_finup_finish2(req, err); | |
375 | return err; | |
376 | } | |
377 | ||
378 | static void ahash_def_finup_done1(struct crypto_async_request *req, int err) | |
379 | { | |
380 | struct ahash_request *areq = req->data; | |
66f6ce5e HX |
381 | |
382 | err = ahash_def_finup_finish1(areq, err); | |
383 | ||
d4a7a0fb | 384 | areq->base.complete(&areq->base, err); |
66f6ce5e HX |
385 | } |
386 | ||
387 | static int ahash_def_finup(struct ahash_request *req) | |
388 | { | |
389 | struct crypto_ahash *tfm = crypto_ahash_reqtfm(req); | |
d4a7a0fb | 390 | int err; |
66f6ce5e | 391 | |
d4a7a0fb MV |
392 | err = ahash_save_req(req, ahash_def_finup_done1); |
393 | if (err) | |
394 | return err; | |
66f6ce5e | 395 | |
d4a7a0fb MV |
396 | err = tfm->update(req); |
397 | return ahash_def_finup_finish1(req, err); | |
66f6ce5e HX |
398 | } |
399 | ||
400 | static int ahash_no_export(struct ahash_request *req, void *out) | |
401 | { | |
402 | return -ENOSYS; | |
403 | } | |
404 | ||
405 | static int ahash_no_import(struct ahash_request *req, const void *in) | |
406 | { | |
407 | return -ENOSYS; | |
408 | } | |
409 | ||
88056ec3 HX |
410 | static int crypto_ahash_init_tfm(struct crypto_tfm *tfm) |
411 | { | |
412 | struct crypto_ahash *hash = __crypto_ahash_cast(tfm); | |
413 | struct ahash_alg *alg = crypto_ahash_alg(hash); | |
88056ec3 | 414 | |
66f6ce5e HX |
415 | hash->setkey = ahash_nosetkey; |
416 | hash->export = ahash_no_export; | |
417 | hash->import = ahash_no_import; | |
418 | ||
88056ec3 HX |
419 | if (tfm->__crt_alg->cra_type != &crypto_ahash_type) |
420 | return crypto_init_shash_ops_async(tfm); | |
421 | ||
88056ec3 HX |
422 | hash->init = alg->init; |
423 | hash->update = alg->update; | |
66f6ce5e HX |
424 | hash->final = alg->final; |
425 | hash->finup = alg->finup ?: ahash_def_finup; | |
88056ec3 | 426 | hash->digest = alg->digest; |
66f6ce5e HX |
427 | |
428 | if (alg->setkey) | |
429 | hash->setkey = alg->setkey; | |
430 | if (alg->export) | |
431 | hash->export = alg->export; | |
432 | if (alg->import) | |
433 | hash->import = alg->import; | |
88056ec3 HX |
434 | |
435 | return 0; | |
436 | } | |
437 | ||
438 | static unsigned int crypto_ahash_extsize(struct crypto_alg *alg) | |
439 | { | |
440 | if (alg->cra_type == &crypto_ahash_type) | |
441 | return alg->cra_ctxsize; | |
442 | ||
443 | return sizeof(struct crypto_shash *); | |
444 | } | |
445 | ||
3acc8473 | 446 | #ifdef CONFIG_NET |
6238cbae SK |
447 | static int crypto_ahash_report(struct sk_buff *skb, struct crypto_alg *alg) |
448 | { | |
449 | struct crypto_report_hash rhash; | |
450 | ||
9a5467bf | 451 | strncpy(rhash.type, "ahash", sizeof(rhash.type)); |
6238cbae SK |
452 | |
453 | rhash.blocksize = alg->cra_blocksize; | |
454 | rhash.digestsize = __crypto_hash_alg_common(alg)->digestsize; | |
455 | ||
6662df33 DM |
456 | if (nla_put(skb, CRYPTOCFGA_REPORT_HASH, |
457 | sizeof(struct crypto_report_hash), &rhash)) | |
458 | goto nla_put_failure; | |
6238cbae SK |
459 | return 0; |
460 | ||
461 | nla_put_failure: | |
462 | return -EMSGSIZE; | |
463 | } | |
3acc8473 HX |
464 | #else |
465 | static int crypto_ahash_report(struct sk_buff *skb, struct crypto_alg *alg) | |
466 | { | |
467 | return -ENOSYS; | |
468 | } | |
469 | #endif | |
6238cbae | 470 | |
004a403c LH |
471 | static void crypto_ahash_show(struct seq_file *m, struct crypto_alg *alg) |
472 | __attribute__ ((unused)); | |
473 | static void crypto_ahash_show(struct seq_file *m, struct crypto_alg *alg) | |
474 | { | |
475 | seq_printf(m, "type : ahash\n"); | |
476 | seq_printf(m, "async : %s\n", alg->cra_flags & CRYPTO_ALG_ASYNC ? | |
477 | "yes" : "no"); | |
478 | seq_printf(m, "blocksize : %u\n", alg->cra_blocksize); | |
88056ec3 HX |
479 | seq_printf(m, "digestsize : %u\n", |
480 | __crypto_hash_alg_common(alg)->digestsize); | |
004a403c LH |
481 | } |
482 | ||
483 | const struct crypto_type crypto_ahash_type = { | |
88056ec3 HX |
484 | .extsize = crypto_ahash_extsize, |
485 | .init_tfm = crypto_ahash_init_tfm, | |
004a403c LH |
486 | #ifdef CONFIG_PROC_FS |
487 | .show = crypto_ahash_show, | |
488 | #endif | |
6238cbae | 489 | .report = crypto_ahash_report, |
88056ec3 HX |
490 | .maskclear = ~CRYPTO_ALG_TYPE_MASK, |
491 | .maskset = CRYPTO_ALG_TYPE_AHASH_MASK, | |
492 | .type = CRYPTO_ALG_TYPE_AHASH, | |
493 | .tfmsize = offsetof(struct crypto_ahash, base), | |
004a403c LH |
494 | }; |
495 | EXPORT_SYMBOL_GPL(crypto_ahash_type); | |
496 | ||
88056ec3 HX |
497 | struct crypto_ahash *crypto_alloc_ahash(const char *alg_name, u32 type, |
498 | u32 mask) | |
499 | { | |
500 | return crypto_alloc_tfm(alg_name, &crypto_ahash_type, type, mask); | |
501 | } | |
502 | EXPORT_SYMBOL_GPL(crypto_alloc_ahash); | |
503 | ||
01c2dece HX |
504 | static int ahash_prepare_alg(struct ahash_alg *alg) |
505 | { | |
506 | struct crypto_alg *base = &alg->halg.base; | |
507 | ||
508 | if (alg->halg.digestsize > PAGE_SIZE / 8 || | |
509 | alg->halg.statesize > PAGE_SIZE / 8) | |
510 | return -EINVAL; | |
511 | ||
512 | base->cra_type = &crypto_ahash_type; | |
513 | base->cra_flags &= ~CRYPTO_ALG_TYPE_MASK; | |
514 | base->cra_flags |= CRYPTO_ALG_TYPE_AHASH; | |
515 | ||
516 | return 0; | |
517 | } | |
518 | ||
519 | int crypto_register_ahash(struct ahash_alg *alg) | |
520 | { | |
521 | struct crypto_alg *base = &alg->halg.base; | |
522 | int err; | |
523 | ||
524 | err = ahash_prepare_alg(alg); | |
525 | if (err) | |
526 | return err; | |
527 | ||
528 | return crypto_register_alg(base); | |
529 | } | |
530 | EXPORT_SYMBOL_GPL(crypto_register_ahash); | |
531 | ||
532 | int crypto_unregister_ahash(struct ahash_alg *alg) | |
533 | { | |
534 | return crypto_unregister_alg(&alg->halg.base); | |
535 | } | |
536 | EXPORT_SYMBOL_GPL(crypto_unregister_ahash); | |
537 | ||
538 | int ahash_register_instance(struct crypto_template *tmpl, | |
539 | struct ahash_instance *inst) | |
540 | { | |
541 | int err; | |
542 | ||
543 | err = ahash_prepare_alg(&inst->alg); | |
544 | if (err) | |
545 | return err; | |
546 | ||
547 | return crypto_register_instance(tmpl, ahash_crypto_instance(inst)); | |
548 | } | |
549 | EXPORT_SYMBOL_GPL(ahash_register_instance); | |
550 | ||
551 | void ahash_free_instance(struct crypto_instance *inst) | |
552 | { | |
553 | crypto_drop_spawn(crypto_instance_ctx(inst)); | |
554 | kfree(ahash_instance(inst)); | |
555 | } | |
556 | EXPORT_SYMBOL_GPL(ahash_free_instance); | |
557 | ||
558 | int crypto_init_ahash_spawn(struct crypto_ahash_spawn *spawn, | |
559 | struct hash_alg_common *alg, | |
560 | struct crypto_instance *inst) | |
561 | { | |
562 | return crypto_init_spawn2(&spawn->base, &alg->base, inst, | |
563 | &crypto_ahash_type); | |
564 | } | |
565 | EXPORT_SYMBOL_GPL(crypto_init_ahash_spawn); | |
566 | ||
567 | struct hash_alg_common *ahash_attr_alg(struct rtattr *rta, u32 type, u32 mask) | |
568 | { | |
569 | struct crypto_alg *alg; | |
570 | ||
571 | alg = crypto_attr_alg2(rta, &crypto_ahash_type, type, mask); | |
572 | return IS_ERR(alg) ? ERR_CAST(alg) : __crypto_hash_alg_common(alg); | |
573 | } | |
574 | EXPORT_SYMBOL_GPL(ahash_attr_alg); | |
575 | ||
004a403c LH |
576 | MODULE_LICENSE("GPL"); |
577 | MODULE_DESCRIPTION("Asynchronous cryptographic hash type"); |