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> | |
75ecb231 | 18 | #include <linux/bug.h> |
004a403c LH |
19 | #include <linux/err.h> |
20 | #include <linux/kernel.h> | |
21 | #include <linux/module.h> | |
22 | #include <linux/sched.h> | |
23 | #include <linux/slab.h> | |
24 | #include <linux/seq_file.h> | |
6238cbae | 25 | #include <linux/cryptouser.h> |
d8c34b94 | 26 | #include <linux/compiler.h> |
6238cbae | 27 | #include <net/netlink.h> |
004a403c LH |
28 | |
29 | #include "internal.h" | |
30 | ||
66f6ce5e HX |
31 | struct ahash_request_priv { |
32 | crypto_completion_t complete; | |
33 | void *data; | |
34 | u8 *result; | |
35 | void *ubuf[] CRYPTO_MINALIGN_ATTR; | |
36 | }; | |
37 | ||
88056ec3 HX |
38 | static inline struct ahash_alg *crypto_ahash_alg(struct crypto_ahash *hash) |
39 | { | |
40 | return container_of(crypto_hash_alg_common(hash), struct ahash_alg, | |
41 | halg); | |
42 | } | |
43 | ||
20036252 HX |
44 | static int hash_walk_next(struct crypto_hash_walk *walk) |
45 | { | |
46 | unsigned int alignmask = walk->alignmask; | |
47 | unsigned int offset = walk->offset; | |
48 | unsigned int nbytes = min(walk->entrylen, | |
49 | ((unsigned int)(PAGE_SIZE)) - offset); | |
50 | ||
75ecb231 HX |
51 | if (walk->flags & CRYPTO_ALG_ASYNC) |
52 | walk->data = kmap(walk->pg); | |
53 | else | |
54 | walk->data = kmap_atomic(walk->pg); | |
20036252 HX |
55 | walk->data += offset; |
56 | ||
23a75eee SÖ |
57 | if (offset & alignmask) { |
58 | unsigned int unaligned = alignmask + 1 - (offset & alignmask); | |
b516d514 | 59 | |
23a75eee SÖ |
60 | if (nbytes > unaligned) |
61 | nbytes = unaligned; | |
62 | } | |
20036252 HX |
63 | |
64 | walk->entrylen -= nbytes; | |
65 | return nbytes; | |
66 | } | |
67 | ||
68 | static int hash_walk_new_entry(struct crypto_hash_walk *walk) | |
69 | { | |
70 | struct scatterlist *sg; | |
71 | ||
72 | sg = walk->sg; | |
20036252 | 73 | walk->offset = sg->offset; |
13f4bb78 HX |
74 | walk->pg = sg_page(walk->sg) + (walk->offset >> PAGE_SHIFT); |
75 | walk->offset = offset_in_page(walk->offset); | |
20036252 HX |
76 | walk->entrylen = sg->length; |
77 | ||
78 | if (walk->entrylen > walk->total) | |
79 | walk->entrylen = walk->total; | |
80 | walk->total -= walk->entrylen; | |
81 | ||
82 | return hash_walk_next(walk); | |
83 | } | |
84 | ||
85 | int crypto_hash_walk_done(struct crypto_hash_walk *walk, int err) | |
86 | { | |
87 | unsigned int alignmask = walk->alignmask; | |
88 | unsigned int nbytes = walk->entrylen; | |
89 | ||
90 | walk->data -= walk->offset; | |
91 | ||
92 | if (nbytes && walk->offset & alignmask && !err) { | |
20036252 HX |
93 | walk->offset = ALIGN(walk->offset, alignmask + 1); |
94 | walk->data += walk->offset; | |
95 | ||
96 | nbytes = min(nbytes, | |
97 | ((unsigned int)(PAGE_SIZE)) - walk->offset); | |
98 | walk->entrylen -= nbytes; | |
99 | ||
100 | return nbytes; | |
101 | } | |
102 | ||
75ecb231 HX |
103 | if (walk->flags & CRYPTO_ALG_ASYNC) |
104 | kunmap(walk->pg); | |
105 | else { | |
106 | kunmap_atomic(walk->data); | |
107 | /* | |
108 | * The may sleep test only makes sense for sync users. | |
109 | * Async users don't need to sleep here anyway. | |
110 | */ | |
111 | crypto_yield(walk->flags); | |
112 | } | |
20036252 HX |
113 | |
114 | if (err) | |
115 | return err; | |
116 | ||
d315a0e0 HX |
117 | if (nbytes) { |
118 | walk->offset = 0; | |
119 | walk->pg++; | |
20036252 | 120 | return hash_walk_next(walk); |
d315a0e0 | 121 | } |
20036252 HX |
122 | |
123 | if (!walk->total) | |
124 | return 0; | |
125 | ||
5be4d4c9 | 126 | walk->sg = sg_next(walk->sg); |
20036252 HX |
127 | |
128 | return hash_walk_new_entry(walk); | |
129 | } | |
130 | EXPORT_SYMBOL_GPL(crypto_hash_walk_done); | |
131 | ||
132 | int crypto_hash_walk_first(struct ahash_request *req, | |
133 | struct crypto_hash_walk *walk) | |
134 | { | |
135 | walk->total = req->nbytes; | |
136 | ||
6d9529c5 TC |
137 | if (!walk->total) { |
138 | walk->entrylen = 0; | |
20036252 | 139 | return 0; |
6d9529c5 | 140 | } |
20036252 HX |
141 | |
142 | walk->alignmask = crypto_ahash_alignmask(crypto_ahash_reqtfm(req)); | |
143 | walk->sg = req->src; | |
75ecb231 | 144 | walk->flags = req->base.flags & CRYPTO_TFM_REQ_MASK; |
20036252 HX |
145 | |
146 | return hash_walk_new_entry(walk); | |
147 | } | |
148 | EXPORT_SYMBOL_GPL(crypto_hash_walk_first); | |
149 | ||
75ecb231 HX |
150 | int crypto_ahash_walk_first(struct ahash_request *req, |
151 | struct crypto_hash_walk *walk) | |
152 | { | |
153 | walk->total = req->nbytes; | |
154 | ||
6d9529c5 TC |
155 | if (!walk->total) { |
156 | walk->entrylen = 0; | |
75ecb231 | 157 | return 0; |
6d9529c5 | 158 | } |
75ecb231 HX |
159 | |
160 | walk->alignmask = crypto_ahash_alignmask(crypto_ahash_reqtfm(req)); | |
161 | walk->sg = req->src; | |
162 | walk->flags = req->base.flags & CRYPTO_TFM_REQ_MASK; | |
163 | walk->flags |= CRYPTO_ALG_ASYNC; | |
164 | ||
165 | BUILD_BUG_ON(CRYPTO_TFM_REQ_MASK & CRYPTO_ALG_ASYNC); | |
166 | ||
167 | return hash_walk_new_entry(walk); | |
168 | } | |
169 | EXPORT_SYMBOL_GPL(crypto_ahash_walk_first); | |
170 | ||
004a403c LH |
171 | static int ahash_setkey_unaligned(struct crypto_ahash *tfm, const u8 *key, |
172 | unsigned int keylen) | |
173 | { | |
004a403c LH |
174 | unsigned long alignmask = crypto_ahash_alignmask(tfm); |
175 | int ret; | |
176 | u8 *buffer, *alignbuffer; | |
177 | unsigned long absize; | |
178 | ||
179 | absize = keylen + alignmask; | |
093900c2 | 180 | buffer = kmalloc(absize, GFP_KERNEL); |
004a403c LH |
181 | if (!buffer) |
182 | return -ENOMEM; | |
183 | ||
184 | alignbuffer = (u8 *)ALIGN((unsigned long)buffer, alignmask + 1); | |
185 | memcpy(alignbuffer, key, keylen); | |
a70c5225 | 186 | ret = tfm->setkey(tfm, alignbuffer, keylen); |
8c32c516 | 187 | kzfree(buffer); |
004a403c LH |
188 | return ret; |
189 | } | |
190 | ||
66f6ce5e | 191 | int crypto_ahash_setkey(struct crypto_ahash *tfm, const u8 *key, |
004a403c LH |
192 | unsigned int keylen) |
193 | { | |
004a403c LH |
194 | unsigned long alignmask = crypto_ahash_alignmask(tfm); |
195 | ||
196 | if ((unsigned long)key & alignmask) | |
197 | return ahash_setkey_unaligned(tfm, key, keylen); | |
198 | ||
a70c5225 | 199 | return tfm->setkey(tfm, key, keylen); |
004a403c | 200 | } |
66f6ce5e | 201 | EXPORT_SYMBOL_GPL(crypto_ahash_setkey); |
004a403c | 202 | |
3751f402 HX |
203 | static int ahash_nosetkey(struct crypto_ahash *tfm, const u8 *key, |
204 | unsigned int keylen) | |
205 | { | |
206 | return -ENOSYS; | |
207 | } | |
208 | ||
66f6ce5e HX |
209 | static inline unsigned int ahash_align_buffer_size(unsigned len, |
210 | unsigned long mask) | |
211 | { | |
212 | return len + (mask & ~(crypto_tfm_ctx_alignment() - 1)); | |
213 | } | |
214 | ||
1ffc9fbd | 215 | static int ahash_save_req(struct ahash_request *req, crypto_completion_t cplt) |
66f6ce5e HX |
216 | { |
217 | struct crypto_ahash *tfm = crypto_ahash_reqtfm(req); | |
218 | unsigned long alignmask = crypto_ahash_alignmask(tfm); | |
219 | unsigned int ds = crypto_ahash_digestsize(tfm); | |
220 | struct ahash_request_priv *priv; | |
66f6ce5e HX |
221 | |
222 | priv = kmalloc(sizeof(*priv) + ahash_align_buffer_size(ds, alignmask), | |
223 | (req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP) ? | |
5befbd5a | 224 | GFP_KERNEL : GFP_ATOMIC); |
66f6ce5e HX |
225 | if (!priv) |
226 | return -ENOMEM; | |
227 | ||
ab6bf4e5 MV |
228 | /* |
229 | * WARNING: Voodoo programming below! | |
230 | * | |
231 | * The code below is obscure and hard to understand, thus explanation | |
232 | * is necessary. See include/crypto/hash.h and include/linux/crypto.h | |
233 | * to understand the layout of structures used here! | |
234 | * | |
235 | * The code here will replace portions of the ORIGINAL request with | |
236 | * pointers to new code and buffers so the hashing operation can store | |
237 | * the result in aligned buffer. We will call the modified request | |
238 | * an ADJUSTED request. | |
239 | * | |
240 | * The newly mangled request will look as such: | |
241 | * | |
242 | * req { | |
243 | * .result = ADJUSTED[new aligned buffer] | |
244 | * .base.complete = ADJUSTED[pointer to completion function] | |
245 | * .base.data = ADJUSTED[*req (pointer to self)] | |
246 | * .priv = ADJUSTED[new priv] { | |
247 | * .result = ORIGINAL(result) | |
248 | * .complete = ORIGINAL(base.complete) | |
249 | * .data = ORIGINAL(base.data) | |
250 | * } | |
251 | */ | |
252 | ||
66f6ce5e HX |
253 | priv->result = req->result; |
254 | priv->complete = req->base.complete; | |
255 | priv->data = req->base.data; | |
ab6bf4e5 MV |
256 | /* |
257 | * WARNING: We do not backup req->priv here! The req->priv | |
258 | * is for internal use of the Crypto API and the | |
259 | * user must _NOT_ _EVER_ depend on it's content! | |
260 | */ | |
66f6ce5e HX |
261 | |
262 | req->result = PTR_ALIGN((u8 *)priv->ubuf, alignmask + 1); | |
1ffc9fbd | 263 | req->base.complete = cplt; |
66f6ce5e HX |
264 | req->base.data = req; |
265 | req->priv = priv; | |
266 | ||
1ffc9fbd MV |
267 | return 0; |
268 | } | |
269 | ||
270 | static void ahash_restore_req(struct ahash_request *req) | |
271 | { | |
272 | struct ahash_request_priv *priv = req->priv; | |
273 | ||
274 | /* Restore the original crypto request. */ | |
275 | req->result = priv->result; | |
276 | req->base.complete = priv->complete; | |
277 | req->base.data = priv->data; | |
278 | req->priv = NULL; | |
279 | ||
280 | /* Free the req->priv.priv from the ADJUSTED request. */ | |
281 | kzfree(priv); | |
282 | } | |
283 | ||
284 | static void ahash_op_unaligned_finish(struct ahash_request *req, int err) | |
285 | { | |
286 | struct ahash_request_priv *priv = req->priv; | |
287 | ||
288 | if (err == -EINPROGRESS) | |
289 | return; | |
290 | ||
291 | if (!err) | |
292 | memcpy(priv->result, req->result, | |
293 | crypto_ahash_digestsize(crypto_ahash_reqtfm(req))); | |
294 | ||
295 | ahash_restore_req(req); | |
296 | } | |
297 | ||
298 | static void ahash_op_unaligned_done(struct crypto_async_request *req, int err) | |
299 | { | |
300 | struct ahash_request *areq = req->data; | |
301 | ||
302 | /* | |
303 | * Restore the original request, see ahash_op_unaligned() for what | |
304 | * goes where. | |
305 | * | |
306 | * The "struct ahash_request *req" here is in fact the "req.base" | |
307 | * from the ADJUSTED request from ahash_op_unaligned(), thus as it | |
308 | * is a pointer to self, it is also the ADJUSTED "req" . | |
309 | */ | |
310 | ||
311 | /* First copy req->result into req->priv.result */ | |
312 | ahash_op_unaligned_finish(areq, err); | |
313 | ||
314 | /* Complete the ORIGINAL request. */ | |
315 | areq->base.complete(&areq->base, err); | |
316 | } | |
317 | ||
318 | static int ahash_op_unaligned(struct ahash_request *req, | |
319 | int (*op)(struct ahash_request *)) | |
320 | { | |
321 | int err; | |
322 | ||
323 | err = ahash_save_req(req, ahash_op_unaligned_done); | |
324 | if (err) | |
325 | return err; | |
326 | ||
66f6ce5e HX |
327 | err = op(req); |
328 | ahash_op_unaligned_finish(req, err); | |
329 | ||
330 | return err; | |
331 | } | |
332 | ||
333 | static int crypto_ahash_op(struct ahash_request *req, | |
334 | int (*op)(struct ahash_request *)) | |
335 | { | |
336 | struct crypto_ahash *tfm = crypto_ahash_reqtfm(req); | |
337 | unsigned long alignmask = crypto_ahash_alignmask(tfm); | |
338 | ||
339 | if ((unsigned long)req->result & alignmask) | |
340 | return ahash_op_unaligned(req, op); | |
341 | ||
342 | return op(req); | |
343 | } | |
344 | ||
345 | int crypto_ahash_final(struct ahash_request *req) | |
346 | { | |
347 | return crypto_ahash_op(req, crypto_ahash_reqtfm(req)->final); | |
348 | } | |
349 | EXPORT_SYMBOL_GPL(crypto_ahash_final); | |
350 | ||
351 | int crypto_ahash_finup(struct ahash_request *req) | |
352 | { | |
353 | return crypto_ahash_op(req, crypto_ahash_reqtfm(req)->finup); | |
354 | } | |
355 | EXPORT_SYMBOL_GPL(crypto_ahash_finup); | |
356 | ||
357 | int crypto_ahash_digest(struct ahash_request *req) | |
358 | { | |
359 | return crypto_ahash_op(req, crypto_ahash_reqtfm(req)->digest); | |
360 | } | |
361 | EXPORT_SYMBOL_GPL(crypto_ahash_digest); | |
362 | ||
363 | static void ahash_def_finup_finish2(struct ahash_request *req, int err) | |
364 | { | |
365 | struct ahash_request_priv *priv = req->priv; | |
366 | ||
367 | if (err == -EINPROGRESS) | |
368 | return; | |
369 | ||
370 | if (!err) | |
371 | memcpy(priv->result, req->result, | |
372 | crypto_ahash_digestsize(crypto_ahash_reqtfm(req))); | |
373 | ||
d4a7a0fb | 374 | ahash_restore_req(req); |
66f6ce5e HX |
375 | } |
376 | ||
377 | static void ahash_def_finup_done2(struct crypto_async_request *req, int err) | |
378 | { | |
379 | struct ahash_request *areq = req->data; | |
66f6ce5e HX |
380 | |
381 | ahash_def_finup_finish2(areq, err); | |
382 | ||
d4a7a0fb | 383 | areq->base.complete(&areq->base, err); |
66f6ce5e HX |
384 | } |
385 | ||
386 | static int ahash_def_finup_finish1(struct ahash_request *req, int err) | |
387 | { | |
388 | if (err) | |
389 | goto out; | |
390 | ||
391 | req->base.complete = ahash_def_finup_done2; | |
392 | req->base.flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP; | |
393 | err = crypto_ahash_reqtfm(req)->final(req); | |
394 | ||
395 | out: | |
396 | ahash_def_finup_finish2(req, err); | |
397 | return err; | |
398 | } | |
399 | ||
400 | static void ahash_def_finup_done1(struct crypto_async_request *req, int err) | |
401 | { | |
402 | struct ahash_request *areq = req->data; | |
66f6ce5e HX |
403 | |
404 | err = ahash_def_finup_finish1(areq, err); | |
405 | ||
d4a7a0fb | 406 | areq->base.complete(&areq->base, err); |
66f6ce5e HX |
407 | } |
408 | ||
409 | static int ahash_def_finup(struct ahash_request *req) | |
410 | { | |
411 | struct crypto_ahash *tfm = crypto_ahash_reqtfm(req); | |
d4a7a0fb | 412 | int err; |
66f6ce5e | 413 | |
d4a7a0fb MV |
414 | err = ahash_save_req(req, ahash_def_finup_done1); |
415 | if (err) | |
416 | return err; | |
66f6ce5e | 417 | |
d4a7a0fb MV |
418 | err = tfm->update(req); |
419 | return ahash_def_finup_finish1(req, err); | |
66f6ce5e HX |
420 | } |
421 | ||
422 | static int ahash_no_export(struct ahash_request *req, void *out) | |
423 | { | |
424 | return -ENOSYS; | |
425 | } | |
426 | ||
427 | static int ahash_no_import(struct ahash_request *req, const void *in) | |
428 | { | |
429 | return -ENOSYS; | |
430 | } | |
431 | ||
88056ec3 HX |
432 | static int crypto_ahash_init_tfm(struct crypto_tfm *tfm) |
433 | { | |
434 | struct crypto_ahash *hash = __crypto_ahash_cast(tfm); | |
435 | struct ahash_alg *alg = crypto_ahash_alg(hash); | |
88056ec3 | 436 | |
66f6ce5e | 437 | hash->setkey = ahash_nosetkey; |
a5596d63 | 438 | hash->has_setkey = false; |
66f6ce5e HX |
439 | hash->export = ahash_no_export; |
440 | hash->import = ahash_no_import; | |
441 | ||
88056ec3 HX |
442 | if (tfm->__crt_alg->cra_type != &crypto_ahash_type) |
443 | return crypto_init_shash_ops_async(tfm); | |
444 | ||
88056ec3 HX |
445 | hash->init = alg->init; |
446 | hash->update = alg->update; | |
66f6ce5e HX |
447 | hash->final = alg->final; |
448 | hash->finup = alg->finup ?: ahash_def_finup; | |
88056ec3 | 449 | hash->digest = alg->digest; |
66f6ce5e | 450 | |
a5596d63 | 451 | if (alg->setkey) { |
66f6ce5e | 452 | hash->setkey = alg->setkey; |
a5596d63 HX |
453 | hash->has_setkey = true; |
454 | } | |
66f6ce5e HX |
455 | if (alg->export) |
456 | hash->export = alg->export; | |
457 | if (alg->import) | |
458 | hash->import = alg->import; | |
88056ec3 HX |
459 | |
460 | return 0; | |
461 | } | |
462 | ||
463 | static unsigned int crypto_ahash_extsize(struct crypto_alg *alg) | |
464 | { | |
2495cf25 HX |
465 | if (alg->cra_type != &crypto_ahash_type) |
466 | return sizeof(struct crypto_shash *); | |
88056ec3 | 467 | |
2495cf25 | 468 | return crypto_alg_extsize(alg); |
88056ec3 HX |
469 | } |
470 | ||
3acc8473 | 471 | #ifdef CONFIG_NET |
6238cbae SK |
472 | static int crypto_ahash_report(struct sk_buff *skb, struct crypto_alg *alg) |
473 | { | |
474 | struct crypto_report_hash rhash; | |
475 | ||
9a5467bf | 476 | strncpy(rhash.type, "ahash", sizeof(rhash.type)); |
6238cbae SK |
477 | |
478 | rhash.blocksize = alg->cra_blocksize; | |
479 | rhash.digestsize = __crypto_hash_alg_common(alg)->digestsize; | |
480 | ||
6662df33 DM |
481 | if (nla_put(skb, CRYPTOCFGA_REPORT_HASH, |
482 | sizeof(struct crypto_report_hash), &rhash)) | |
483 | goto nla_put_failure; | |
6238cbae SK |
484 | return 0; |
485 | ||
486 | nla_put_failure: | |
487 | return -EMSGSIZE; | |
488 | } | |
3acc8473 HX |
489 | #else |
490 | static int crypto_ahash_report(struct sk_buff *skb, struct crypto_alg *alg) | |
491 | { | |
492 | return -ENOSYS; | |
493 | } | |
494 | #endif | |
6238cbae | 495 | |
004a403c | 496 | static void crypto_ahash_show(struct seq_file *m, struct crypto_alg *alg) |
d8c34b94 | 497 | __maybe_unused; |
004a403c LH |
498 | static void crypto_ahash_show(struct seq_file *m, struct crypto_alg *alg) |
499 | { | |
500 | seq_printf(m, "type : ahash\n"); | |
501 | seq_printf(m, "async : %s\n", alg->cra_flags & CRYPTO_ALG_ASYNC ? | |
502 | "yes" : "no"); | |
503 | seq_printf(m, "blocksize : %u\n", alg->cra_blocksize); | |
88056ec3 HX |
504 | seq_printf(m, "digestsize : %u\n", |
505 | __crypto_hash_alg_common(alg)->digestsize); | |
004a403c LH |
506 | } |
507 | ||
508 | const struct crypto_type crypto_ahash_type = { | |
88056ec3 HX |
509 | .extsize = crypto_ahash_extsize, |
510 | .init_tfm = crypto_ahash_init_tfm, | |
004a403c LH |
511 | #ifdef CONFIG_PROC_FS |
512 | .show = crypto_ahash_show, | |
513 | #endif | |
6238cbae | 514 | .report = crypto_ahash_report, |
88056ec3 HX |
515 | .maskclear = ~CRYPTO_ALG_TYPE_MASK, |
516 | .maskset = CRYPTO_ALG_TYPE_AHASH_MASK, | |
517 | .type = CRYPTO_ALG_TYPE_AHASH, | |
518 | .tfmsize = offsetof(struct crypto_ahash, base), | |
004a403c LH |
519 | }; |
520 | EXPORT_SYMBOL_GPL(crypto_ahash_type); | |
521 | ||
88056ec3 HX |
522 | struct crypto_ahash *crypto_alloc_ahash(const char *alg_name, u32 type, |
523 | u32 mask) | |
524 | { | |
525 | return crypto_alloc_tfm(alg_name, &crypto_ahash_type, type, mask); | |
526 | } | |
527 | EXPORT_SYMBOL_GPL(crypto_alloc_ahash); | |
528 | ||
8d18e34c HX |
529 | int crypto_has_ahash(const char *alg_name, u32 type, u32 mask) |
530 | { | |
531 | return crypto_type_has_alg(alg_name, &crypto_ahash_type, type, mask); | |
532 | } | |
533 | EXPORT_SYMBOL_GPL(crypto_has_ahash); | |
534 | ||
01c2dece HX |
535 | static int ahash_prepare_alg(struct ahash_alg *alg) |
536 | { | |
537 | struct crypto_alg *base = &alg->halg.base; | |
538 | ||
539 | if (alg->halg.digestsize > PAGE_SIZE / 8 || | |
8996eafd RK |
540 | alg->halg.statesize > PAGE_SIZE / 8 || |
541 | alg->halg.statesize == 0) | |
01c2dece HX |
542 | return -EINVAL; |
543 | ||
544 | base->cra_type = &crypto_ahash_type; | |
545 | base->cra_flags &= ~CRYPTO_ALG_TYPE_MASK; | |
546 | base->cra_flags |= CRYPTO_ALG_TYPE_AHASH; | |
547 | ||
548 | return 0; | |
549 | } | |
550 | ||
551 | int crypto_register_ahash(struct ahash_alg *alg) | |
552 | { | |
553 | struct crypto_alg *base = &alg->halg.base; | |
554 | int err; | |
555 | ||
556 | err = ahash_prepare_alg(alg); | |
557 | if (err) | |
558 | return err; | |
559 | ||
560 | return crypto_register_alg(base); | |
561 | } | |
562 | EXPORT_SYMBOL_GPL(crypto_register_ahash); | |
563 | ||
564 | int crypto_unregister_ahash(struct ahash_alg *alg) | |
565 | { | |
566 | return crypto_unregister_alg(&alg->halg.base); | |
567 | } | |
568 | EXPORT_SYMBOL_GPL(crypto_unregister_ahash); | |
569 | ||
570 | int ahash_register_instance(struct crypto_template *tmpl, | |
571 | struct ahash_instance *inst) | |
572 | { | |
573 | int err; | |
574 | ||
575 | err = ahash_prepare_alg(&inst->alg); | |
576 | if (err) | |
577 | return err; | |
578 | ||
579 | return crypto_register_instance(tmpl, ahash_crypto_instance(inst)); | |
580 | } | |
581 | EXPORT_SYMBOL_GPL(ahash_register_instance); | |
582 | ||
583 | void ahash_free_instance(struct crypto_instance *inst) | |
584 | { | |
585 | crypto_drop_spawn(crypto_instance_ctx(inst)); | |
586 | kfree(ahash_instance(inst)); | |
587 | } | |
588 | EXPORT_SYMBOL_GPL(ahash_free_instance); | |
589 | ||
590 | int crypto_init_ahash_spawn(struct crypto_ahash_spawn *spawn, | |
591 | struct hash_alg_common *alg, | |
592 | struct crypto_instance *inst) | |
593 | { | |
594 | return crypto_init_spawn2(&spawn->base, &alg->base, inst, | |
595 | &crypto_ahash_type); | |
596 | } | |
597 | EXPORT_SYMBOL_GPL(crypto_init_ahash_spawn); | |
598 | ||
599 | struct hash_alg_common *ahash_attr_alg(struct rtattr *rta, u32 type, u32 mask) | |
600 | { | |
601 | struct crypto_alg *alg; | |
602 | ||
603 | alg = crypto_attr_alg2(rta, &crypto_ahash_type, type, mask); | |
604 | return IS_ERR(alg) ? ERR_CAST(alg) : __crypto_hash_alg_common(alg); | |
605 | } | |
606 | EXPORT_SYMBOL_GPL(ahash_attr_alg); | |
607 | ||
004a403c LH |
608 | MODULE_LICENSE("GPL"); |
609 | MODULE_DESCRIPTION("Asynchronous cryptographic hash type"); |