Root/
1 | /* |
2 | * Synchronous Cryptographic Hash operations. |
3 | * |
4 | * Copyright (c) 2008 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 | #include <crypto/scatterwalk.h> |
14 | #include <crypto/internal/hash.h> |
15 | #include <linux/err.h> |
16 | #include <linux/kernel.h> |
17 | #include <linux/module.h> |
18 | #include <linux/slab.h> |
19 | #include <linux/seq_file.h> |
20 | |
21 | #include "internal.h" |
22 | |
23 | static const struct crypto_type crypto_shash_type; |
24 | |
25 | static int shash_no_setkey(struct crypto_shash *tfm, const u8 *key, |
26 | unsigned int keylen) |
27 | { |
28 | return -ENOSYS; |
29 | } |
30 | |
31 | static int shash_setkey_unaligned(struct crypto_shash *tfm, const u8 *key, |
32 | unsigned int keylen) |
33 | { |
34 | struct shash_alg *shash = crypto_shash_alg(tfm); |
35 | unsigned long alignmask = crypto_shash_alignmask(tfm); |
36 | unsigned long absize; |
37 | u8 *buffer, *alignbuffer; |
38 | int err; |
39 | |
40 | absize = keylen + (alignmask & ~(CRYPTO_MINALIGN - 1)); |
41 | buffer = kmalloc(absize, GFP_KERNEL); |
42 | if (!buffer) |
43 | return -ENOMEM; |
44 | |
45 | alignbuffer = (u8 *)ALIGN((unsigned long)buffer, alignmask + 1); |
46 | memcpy(alignbuffer, key, keylen); |
47 | err = shash->setkey(tfm, alignbuffer, keylen); |
48 | kzfree(buffer); |
49 | return err; |
50 | } |
51 | |
52 | int crypto_shash_setkey(struct crypto_shash *tfm, const u8 *key, |
53 | unsigned int keylen) |
54 | { |
55 | struct shash_alg *shash = crypto_shash_alg(tfm); |
56 | unsigned long alignmask = crypto_shash_alignmask(tfm); |
57 | |
58 | if ((unsigned long)key & alignmask) |
59 | return shash_setkey_unaligned(tfm, key, keylen); |
60 | |
61 | return shash->setkey(tfm, key, keylen); |
62 | } |
63 | EXPORT_SYMBOL_GPL(crypto_shash_setkey); |
64 | |
65 | static inline unsigned int shash_align_buffer_size(unsigned len, |
66 | unsigned long mask) |
67 | { |
68 | return len + (mask & ~(__alignof__(u8 __attribute__ ((aligned))) - 1)); |
69 | } |
70 | |
71 | static int shash_update_unaligned(struct shash_desc *desc, const u8 *data, |
72 | unsigned int len) |
73 | { |
74 | struct crypto_shash *tfm = desc->tfm; |
75 | struct shash_alg *shash = crypto_shash_alg(tfm); |
76 | unsigned long alignmask = crypto_shash_alignmask(tfm); |
77 | unsigned int unaligned_len = alignmask + 1 - |
78 | ((unsigned long)data & alignmask); |
79 | u8 ubuf[shash_align_buffer_size(unaligned_len, alignmask)] |
80 | __attribute__ ((aligned)); |
81 | u8 *buf = PTR_ALIGN(&ubuf[0], alignmask + 1); |
82 | int err; |
83 | |
84 | if (unaligned_len > len) |
85 | unaligned_len = len; |
86 | |
87 | memcpy(buf, data, unaligned_len); |
88 | err = shash->update(desc, buf, unaligned_len); |
89 | memset(buf, 0, unaligned_len); |
90 | |
91 | return err ?: |
92 | shash->update(desc, data + unaligned_len, len - unaligned_len); |
93 | } |
94 | |
95 | int crypto_shash_update(struct shash_desc *desc, const u8 *data, |
96 | unsigned int len) |
97 | { |
98 | struct crypto_shash *tfm = desc->tfm; |
99 | struct shash_alg *shash = crypto_shash_alg(tfm); |
100 | unsigned long alignmask = crypto_shash_alignmask(tfm); |
101 | |
102 | if ((unsigned long)data & alignmask) |
103 | return shash_update_unaligned(desc, data, len); |
104 | |
105 | return shash->update(desc, data, len); |
106 | } |
107 | EXPORT_SYMBOL_GPL(crypto_shash_update); |
108 | |
109 | static int shash_final_unaligned(struct shash_desc *desc, u8 *out) |
110 | { |
111 | struct crypto_shash *tfm = desc->tfm; |
112 | unsigned long alignmask = crypto_shash_alignmask(tfm); |
113 | struct shash_alg *shash = crypto_shash_alg(tfm); |
114 | unsigned int ds = crypto_shash_digestsize(tfm); |
115 | u8 ubuf[shash_align_buffer_size(ds, alignmask)] |
116 | __attribute__ ((aligned)); |
117 | u8 *buf = PTR_ALIGN(&ubuf[0], alignmask + 1); |
118 | int err; |
119 | |
120 | err = shash->final(desc, buf); |
121 | if (err) |
122 | goto out; |
123 | |
124 | memcpy(out, buf, ds); |
125 | |
126 | out: |
127 | memset(buf, 0, ds); |
128 | return err; |
129 | } |
130 | |
131 | int crypto_shash_final(struct shash_desc *desc, u8 *out) |
132 | { |
133 | struct crypto_shash *tfm = desc->tfm; |
134 | struct shash_alg *shash = crypto_shash_alg(tfm); |
135 | unsigned long alignmask = crypto_shash_alignmask(tfm); |
136 | |
137 | if ((unsigned long)out & alignmask) |
138 | return shash_final_unaligned(desc, out); |
139 | |
140 | return shash->final(desc, out); |
141 | } |
142 | EXPORT_SYMBOL_GPL(crypto_shash_final); |
143 | |
144 | static int shash_finup_unaligned(struct shash_desc *desc, const u8 *data, |
145 | unsigned int len, u8 *out) |
146 | { |
147 | return crypto_shash_update(desc, data, len) ?: |
148 | crypto_shash_final(desc, out); |
149 | } |
150 | |
151 | int crypto_shash_finup(struct shash_desc *desc, const u8 *data, |
152 | unsigned int len, u8 *out) |
153 | { |
154 | struct crypto_shash *tfm = desc->tfm; |
155 | struct shash_alg *shash = crypto_shash_alg(tfm); |
156 | unsigned long alignmask = crypto_shash_alignmask(tfm); |
157 | |
158 | if (((unsigned long)data | (unsigned long)out) & alignmask) |
159 | return shash_finup_unaligned(desc, data, len, out); |
160 | |
161 | return shash->finup(desc, data, len, out); |
162 | } |
163 | EXPORT_SYMBOL_GPL(crypto_shash_finup); |
164 | |
165 | static int shash_digest_unaligned(struct shash_desc *desc, const u8 *data, |
166 | unsigned int len, u8 *out) |
167 | { |
168 | return crypto_shash_init(desc) ?: |
169 | crypto_shash_finup(desc, data, len, out); |
170 | } |
171 | |
172 | int crypto_shash_digest(struct shash_desc *desc, const u8 *data, |
173 | unsigned int len, u8 *out) |
174 | { |
175 | struct crypto_shash *tfm = desc->tfm; |
176 | struct shash_alg *shash = crypto_shash_alg(tfm); |
177 | unsigned long alignmask = crypto_shash_alignmask(tfm); |
178 | |
179 | if (((unsigned long)data | (unsigned long)out) & alignmask) |
180 | return shash_digest_unaligned(desc, data, len, out); |
181 | |
182 | return shash->digest(desc, data, len, out); |
183 | } |
184 | EXPORT_SYMBOL_GPL(crypto_shash_digest); |
185 | |
186 | static int shash_default_export(struct shash_desc *desc, void *out) |
187 | { |
188 | memcpy(out, shash_desc_ctx(desc), crypto_shash_descsize(desc->tfm)); |
189 | return 0; |
190 | } |
191 | |
192 | static int shash_default_import(struct shash_desc *desc, const void *in) |
193 | { |
194 | memcpy(shash_desc_ctx(desc), in, crypto_shash_descsize(desc->tfm)); |
195 | return 0; |
196 | } |
197 | |
198 | static int shash_async_setkey(struct crypto_ahash *tfm, const u8 *key, |
199 | unsigned int keylen) |
200 | { |
201 | struct crypto_shash **ctx = crypto_ahash_ctx(tfm); |
202 | |
203 | return crypto_shash_setkey(*ctx, key, keylen); |
204 | } |
205 | |
206 | static int shash_async_init(struct ahash_request *req) |
207 | { |
208 | struct crypto_shash **ctx = crypto_ahash_ctx(crypto_ahash_reqtfm(req)); |
209 | struct shash_desc *desc = ahash_request_ctx(req); |
210 | |
211 | desc->tfm = *ctx; |
212 | desc->flags = req->base.flags; |
213 | |
214 | return crypto_shash_init(desc); |
215 | } |
216 | |
217 | int shash_ahash_update(struct ahash_request *req, struct shash_desc *desc) |
218 | { |
219 | struct crypto_hash_walk walk; |
220 | int nbytes; |
221 | |
222 | for (nbytes = crypto_hash_walk_first(req, &walk); nbytes > 0; |
223 | nbytes = crypto_hash_walk_done(&walk, nbytes)) |
224 | nbytes = crypto_shash_update(desc, walk.data, nbytes); |
225 | |
226 | return nbytes; |
227 | } |
228 | EXPORT_SYMBOL_GPL(shash_ahash_update); |
229 | |
230 | static int shash_async_update(struct ahash_request *req) |
231 | { |
232 | return shash_ahash_update(req, ahash_request_ctx(req)); |
233 | } |
234 | |
235 | static int shash_async_final(struct ahash_request *req) |
236 | { |
237 | return crypto_shash_final(ahash_request_ctx(req), req->result); |
238 | } |
239 | |
240 | int shash_ahash_finup(struct ahash_request *req, struct shash_desc *desc) |
241 | { |
242 | struct crypto_hash_walk walk; |
243 | int nbytes; |
244 | |
245 | nbytes = crypto_hash_walk_first(req, &walk); |
246 | if (!nbytes) |
247 | return crypto_shash_final(desc, req->result); |
248 | |
249 | do { |
250 | nbytes = crypto_hash_walk_last(&walk) ? |
251 | crypto_shash_finup(desc, walk.data, nbytes, |
252 | req->result) : |
253 | crypto_shash_update(desc, walk.data, nbytes); |
254 | nbytes = crypto_hash_walk_done(&walk, nbytes); |
255 | } while (nbytes > 0); |
256 | |
257 | return nbytes; |
258 | } |
259 | EXPORT_SYMBOL_GPL(shash_ahash_finup); |
260 | |
261 | static int shash_async_finup(struct ahash_request *req) |
262 | { |
263 | struct crypto_shash **ctx = crypto_ahash_ctx(crypto_ahash_reqtfm(req)); |
264 | struct shash_desc *desc = ahash_request_ctx(req); |
265 | |
266 | desc->tfm = *ctx; |
267 | desc->flags = req->base.flags; |
268 | |
269 | return shash_ahash_finup(req, desc); |
270 | } |
271 | |
272 | int shash_ahash_digest(struct ahash_request *req, struct shash_desc *desc) |
273 | { |
274 | struct scatterlist *sg = req->src; |
275 | unsigned int offset = sg->offset; |
276 | unsigned int nbytes = req->nbytes; |
277 | int err; |
278 | |
279 | if (nbytes < min(sg->length, ((unsigned int)(PAGE_SIZE)) - offset)) { |
280 | void *data; |
281 | |
282 | data = crypto_kmap(sg_page(sg), 0); |
283 | err = crypto_shash_digest(desc, data + offset, nbytes, |
284 | req->result); |
285 | crypto_kunmap(data, 0); |
286 | crypto_yield(desc->flags); |
287 | } else |
288 | err = crypto_shash_init(desc) ?: |
289 | shash_ahash_finup(req, desc); |
290 | |
291 | return err; |
292 | } |
293 | EXPORT_SYMBOL_GPL(shash_ahash_digest); |
294 | |
295 | static int shash_async_digest(struct ahash_request *req) |
296 | { |
297 | struct crypto_shash **ctx = crypto_ahash_ctx(crypto_ahash_reqtfm(req)); |
298 | struct shash_desc *desc = ahash_request_ctx(req); |
299 | |
300 | desc->tfm = *ctx; |
301 | desc->flags = req->base.flags; |
302 | |
303 | return shash_ahash_digest(req, desc); |
304 | } |
305 | |
306 | static int shash_async_export(struct ahash_request *req, void *out) |
307 | { |
308 | return crypto_shash_export(ahash_request_ctx(req), out); |
309 | } |
310 | |
311 | static int shash_async_import(struct ahash_request *req, const void *in) |
312 | { |
313 | return crypto_shash_import(ahash_request_ctx(req), in); |
314 | } |
315 | |
316 | static void crypto_exit_shash_ops_async(struct crypto_tfm *tfm) |
317 | { |
318 | struct crypto_shash **ctx = crypto_tfm_ctx(tfm); |
319 | |
320 | crypto_free_shash(*ctx); |
321 | } |
322 | |
323 | int crypto_init_shash_ops_async(struct crypto_tfm *tfm) |
324 | { |
325 | struct crypto_alg *calg = tfm->__crt_alg; |
326 | struct shash_alg *alg = __crypto_shash_alg(calg); |
327 | struct crypto_ahash *crt = __crypto_ahash_cast(tfm); |
328 | struct crypto_shash **ctx = crypto_tfm_ctx(tfm); |
329 | struct crypto_shash *shash; |
330 | |
331 | if (!crypto_mod_get(calg)) |
332 | return -EAGAIN; |
333 | |
334 | shash = crypto_create_tfm(calg, &crypto_shash_type); |
335 | if (IS_ERR(shash)) { |
336 | crypto_mod_put(calg); |
337 | return PTR_ERR(shash); |
338 | } |
339 | |
340 | *ctx = shash; |
341 | tfm->exit = crypto_exit_shash_ops_async; |
342 | |
343 | crt->init = shash_async_init; |
344 | crt->update = shash_async_update; |
345 | crt->final = shash_async_final; |
346 | crt->finup = shash_async_finup; |
347 | crt->digest = shash_async_digest; |
348 | |
349 | if (alg->setkey) |
350 | crt->setkey = shash_async_setkey; |
351 | if (alg->export) |
352 | crt->export = shash_async_export; |
353 | if (alg->import) |
354 | crt->import = shash_async_import; |
355 | |
356 | crt->reqsize = sizeof(struct shash_desc) + crypto_shash_descsize(shash); |
357 | |
358 | return 0; |
359 | } |
360 | |
361 | static int shash_compat_setkey(struct crypto_hash *tfm, const u8 *key, |
362 | unsigned int keylen) |
363 | { |
364 | struct shash_desc **descp = crypto_hash_ctx(tfm); |
365 | struct shash_desc *desc = *descp; |
366 | |
367 | return crypto_shash_setkey(desc->tfm, key, keylen); |
368 | } |
369 | |
370 | static int shash_compat_init(struct hash_desc *hdesc) |
371 | { |
372 | struct shash_desc **descp = crypto_hash_ctx(hdesc->tfm); |
373 | struct shash_desc *desc = *descp; |
374 | |
375 | desc->flags = hdesc->flags; |
376 | |
377 | return crypto_shash_init(desc); |
378 | } |
379 | |
380 | static int shash_compat_update(struct hash_desc *hdesc, struct scatterlist *sg, |
381 | unsigned int len) |
382 | { |
383 | struct shash_desc **descp = crypto_hash_ctx(hdesc->tfm); |
384 | struct shash_desc *desc = *descp; |
385 | struct crypto_hash_walk walk; |
386 | int nbytes; |
387 | |
388 | for (nbytes = crypto_hash_walk_first_compat(hdesc, &walk, sg, len); |
389 | nbytes > 0; nbytes = crypto_hash_walk_done(&walk, nbytes)) |
390 | nbytes = crypto_shash_update(desc, walk.data, nbytes); |
391 | |
392 | return nbytes; |
393 | } |
394 | |
395 | static int shash_compat_final(struct hash_desc *hdesc, u8 *out) |
396 | { |
397 | struct shash_desc **descp = crypto_hash_ctx(hdesc->tfm); |
398 | |
399 | return crypto_shash_final(*descp, out); |
400 | } |
401 | |
402 | static int shash_compat_digest(struct hash_desc *hdesc, struct scatterlist *sg, |
403 | unsigned int nbytes, u8 *out) |
404 | { |
405 | unsigned int offset = sg->offset; |
406 | int err; |
407 | |
408 | if (nbytes < min(sg->length, ((unsigned int)(PAGE_SIZE)) - offset)) { |
409 | struct shash_desc **descp = crypto_hash_ctx(hdesc->tfm); |
410 | struct shash_desc *desc = *descp; |
411 | void *data; |
412 | |
413 | desc->flags = hdesc->flags; |
414 | |
415 | data = crypto_kmap(sg_page(sg), 0); |
416 | err = crypto_shash_digest(desc, data + offset, nbytes, out); |
417 | crypto_kunmap(data, 0); |
418 | crypto_yield(desc->flags); |
419 | goto out; |
420 | } |
421 | |
422 | err = shash_compat_init(hdesc); |
423 | if (err) |
424 | goto out; |
425 | |
426 | err = shash_compat_update(hdesc, sg, nbytes); |
427 | if (err) |
428 | goto out; |
429 | |
430 | err = shash_compat_final(hdesc, out); |
431 | |
432 | out: |
433 | return err; |
434 | } |
435 | |
436 | static void crypto_exit_shash_ops_compat(struct crypto_tfm *tfm) |
437 | { |
438 | struct shash_desc **descp = crypto_tfm_ctx(tfm); |
439 | struct shash_desc *desc = *descp; |
440 | |
441 | crypto_free_shash(desc->tfm); |
442 | kzfree(desc); |
443 | } |
444 | |
445 | static int crypto_init_shash_ops_compat(struct crypto_tfm *tfm) |
446 | { |
447 | struct hash_tfm *crt = &tfm->crt_hash; |
448 | struct crypto_alg *calg = tfm->__crt_alg; |
449 | struct shash_alg *alg = __crypto_shash_alg(calg); |
450 | struct shash_desc **descp = crypto_tfm_ctx(tfm); |
451 | struct crypto_shash *shash; |
452 | struct shash_desc *desc; |
453 | |
454 | if (!crypto_mod_get(calg)) |
455 | return -EAGAIN; |
456 | |
457 | shash = crypto_create_tfm(calg, &crypto_shash_type); |
458 | if (IS_ERR(shash)) { |
459 | crypto_mod_put(calg); |
460 | return PTR_ERR(shash); |
461 | } |
462 | |
463 | desc = kmalloc(sizeof(*desc) + crypto_shash_descsize(shash), |
464 | GFP_KERNEL); |
465 | if (!desc) { |
466 | crypto_free_shash(shash); |
467 | return -ENOMEM; |
468 | } |
469 | |
470 | *descp = desc; |
471 | desc->tfm = shash; |
472 | tfm->exit = crypto_exit_shash_ops_compat; |
473 | |
474 | crt->init = shash_compat_init; |
475 | crt->update = shash_compat_update; |
476 | crt->final = shash_compat_final; |
477 | crt->digest = shash_compat_digest; |
478 | crt->setkey = shash_compat_setkey; |
479 | |
480 | crt->digestsize = alg->digestsize; |
481 | |
482 | return 0; |
483 | } |
484 | |
485 | static int crypto_init_shash_ops(struct crypto_tfm *tfm, u32 type, u32 mask) |
486 | { |
487 | switch (mask & CRYPTO_ALG_TYPE_MASK) { |
488 | case CRYPTO_ALG_TYPE_HASH_MASK: |
489 | return crypto_init_shash_ops_compat(tfm); |
490 | } |
491 | |
492 | return -EINVAL; |
493 | } |
494 | |
495 | static unsigned int crypto_shash_ctxsize(struct crypto_alg *alg, u32 type, |
496 | u32 mask) |
497 | { |
498 | switch (mask & CRYPTO_ALG_TYPE_MASK) { |
499 | case CRYPTO_ALG_TYPE_HASH_MASK: |
500 | return sizeof(struct shash_desc *); |
501 | } |
502 | |
503 | return 0; |
504 | } |
505 | |
506 | static int crypto_shash_init_tfm(struct crypto_tfm *tfm) |
507 | { |
508 | struct crypto_shash *hash = __crypto_shash_cast(tfm); |
509 | |
510 | hash->descsize = crypto_shash_alg(hash)->descsize; |
511 | return 0; |
512 | } |
513 | |
514 | static unsigned int crypto_shash_extsize(struct crypto_alg *alg) |
515 | { |
516 | return alg->cra_ctxsize; |
517 | } |
518 | |
519 | static void crypto_shash_show(struct seq_file *m, struct crypto_alg *alg) |
520 | __attribute__ ((unused)); |
521 | static void crypto_shash_show(struct seq_file *m, struct crypto_alg *alg) |
522 | { |
523 | struct shash_alg *salg = __crypto_shash_alg(alg); |
524 | |
525 | seq_printf(m, "type : shash\n"); |
526 | seq_printf(m, "blocksize : %u\n", alg->cra_blocksize); |
527 | seq_printf(m, "digestsize : %u\n", salg->digestsize); |
528 | } |
529 | |
530 | static const struct crypto_type crypto_shash_type = { |
531 | .ctxsize = crypto_shash_ctxsize, |
532 | .extsize = crypto_shash_extsize, |
533 | .init = crypto_init_shash_ops, |
534 | .init_tfm = crypto_shash_init_tfm, |
535 | #ifdef CONFIG_PROC_FS |
536 | .show = crypto_shash_show, |
537 | #endif |
538 | .maskclear = ~CRYPTO_ALG_TYPE_MASK, |
539 | .maskset = CRYPTO_ALG_TYPE_MASK, |
540 | .type = CRYPTO_ALG_TYPE_SHASH, |
541 | .tfmsize = offsetof(struct crypto_shash, base), |
542 | }; |
543 | |
544 | struct crypto_shash *crypto_alloc_shash(const char *alg_name, u32 type, |
545 | u32 mask) |
546 | { |
547 | return crypto_alloc_tfm(alg_name, &crypto_shash_type, type, mask); |
548 | } |
549 | EXPORT_SYMBOL_GPL(crypto_alloc_shash); |
550 | |
551 | static int shash_prepare_alg(struct shash_alg *alg) |
552 | { |
553 | struct crypto_alg *base = &alg->base; |
554 | |
555 | if (alg->digestsize > PAGE_SIZE / 8 || |
556 | alg->descsize > PAGE_SIZE / 8 || |
557 | alg->statesize > PAGE_SIZE / 8) |
558 | return -EINVAL; |
559 | |
560 | base->cra_type = &crypto_shash_type; |
561 | base->cra_flags &= ~CRYPTO_ALG_TYPE_MASK; |
562 | base->cra_flags |= CRYPTO_ALG_TYPE_SHASH; |
563 | |
564 | if (!alg->finup) |
565 | alg->finup = shash_finup_unaligned; |
566 | if (!alg->digest) |
567 | alg->digest = shash_digest_unaligned; |
568 | if (!alg->export) { |
569 | alg->export = shash_default_export; |
570 | alg->import = shash_default_import; |
571 | alg->statesize = alg->descsize; |
572 | } |
573 | if (!alg->setkey) |
574 | alg->setkey = shash_no_setkey; |
575 | |
576 | return 0; |
577 | } |
578 | |
579 | int crypto_register_shash(struct shash_alg *alg) |
580 | { |
581 | struct crypto_alg *base = &alg->base; |
582 | int err; |
583 | |
584 | err = shash_prepare_alg(alg); |
585 | if (err) |
586 | return err; |
587 | |
588 | return crypto_register_alg(base); |
589 | } |
590 | EXPORT_SYMBOL_GPL(crypto_register_shash); |
591 | |
592 | int crypto_unregister_shash(struct shash_alg *alg) |
593 | { |
594 | return crypto_unregister_alg(&alg->base); |
595 | } |
596 | EXPORT_SYMBOL_GPL(crypto_unregister_shash); |
597 | |
598 | int shash_register_instance(struct crypto_template *tmpl, |
599 | struct shash_instance *inst) |
600 | { |
601 | int err; |
602 | |
603 | err = shash_prepare_alg(&inst->alg); |
604 | if (err) |
605 | return err; |
606 | |
607 | return crypto_register_instance(tmpl, shash_crypto_instance(inst)); |
608 | } |
609 | EXPORT_SYMBOL_GPL(shash_register_instance); |
610 | |
611 | void shash_free_instance(struct crypto_instance *inst) |
612 | { |
613 | crypto_drop_spawn(crypto_instance_ctx(inst)); |
614 | kfree(shash_instance(inst)); |
615 | } |
616 | EXPORT_SYMBOL_GPL(shash_free_instance); |
617 | |
618 | int crypto_init_shash_spawn(struct crypto_shash_spawn *spawn, |
619 | struct shash_alg *alg, |
620 | struct crypto_instance *inst) |
621 | { |
622 | return crypto_init_spawn2(&spawn->base, &alg->base, inst, |
623 | &crypto_shash_type); |
624 | } |
625 | EXPORT_SYMBOL_GPL(crypto_init_shash_spawn); |
626 | |
627 | struct shash_alg *shash_attr_alg(struct rtattr *rta, u32 type, u32 mask) |
628 | { |
629 | struct crypto_alg *alg; |
630 | |
631 | alg = crypto_attr_alg2(rta, &crypto_shash_type, type, mask); |
632 | return IS_ERR(alg) ? ERR_CAST(alg) : |
633 | container_of(alg, struct shash_alg, base); |
634 | } |
635 | EXPORT_SYMBOL_GPL(shash_attr_alg); |
636 | |
637 | MODULE_LICENSE("GPL"); |
638 | MODULE_DESCRIPTION("Synchronous cryptographic hash type"); |
639 |
Branches:
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javiroman/ks7010
jz-2.6.34
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Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
v3.9