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 | #include <linux/cryptouser.h> |
21 | #include <net/netlink.h> |
22 | |
23 | #include "internal.h" |
24 | |
25 | static const struct crypto_type crypto_shash_type; |
26 | |
27 | static int shash_no_setkey(struct crypto_shash *tfm, const u8 *key, |
28 | unsigned int keylen) |
29 | { |
30 | return -ENOSYS; |
31 | } |
32 | |
33 | static int shash_setkey_unaligned(struct crypto_shash *tfm, const u8 *key, |
34 | unsigned int keylen) |
35 | { |
36 | struct shash_alg *shash = crypto_shash_alg(tfm); |
37 | unsigned long alignmask = crypto_shash_alignmask(tfm); |
38 | unsigned long absize; |
39 | u8 *buffer, *alignbuffer; |
40 | int err; |
41 | |
42 | absize = keylen + (alignmask & ~(crypto_tfm_ctx_alignment() - 1)); |
43 | buffer = kmalloc(absize, GFP_KERNEL); |
44 | if (!buffer) |
45 | return -ENOMEM; |
46 | |
47 | alignbuffer = (u8 *)ALIGN((unsigned long)buffer, alignmask + 1); |
48 | memcpy(alignbuffer, key, keylen); |
49 | err = shash->setkey(tfm, alignbuffer, keylen); |
50 | kzfree(buffer); |
51 | return err; |
52 | } |
53 | |
54 | int crypto_shash_setkey(struct crypto_shash *tfm, const u8 *key, |
55 | unsigned int keylen) |
56 | { |
57 | struct shash_alg *shash = crypto_shash_alg(tfm); |
58 | unsigned long alignmask = crypto_shash_alignmask(tfm); |
59 | |
60 | if ((unsigned long)key & alignmask) |
61 | return shash_setkey_unaligned(tfm, key, keylen); |
62 | |
63 | return shash->setkey(tfm, key, keylen); |
64 | } |
65 | EXPORT_SYMBOL_GPL(crypto_shash_setkey); |
66 | |
67 | static inline unsigned int shash_align_buffer_size(unsigned len, |
68 | unsigned long mask) |
69 | { |
70 | return len + (mask & ~(__alignof__(u8 __attribute__ ((aligned))) - 1)); |
71 | } |
72 | |
73 | static int shash_update_unaligned(struct shash_desc *desc, const u8 *data, |
74 | unsigned int len) |
75 | { |
76 | struct crypto_shash *tfm = desc->tfm; |
77 | struct shash_alg *shash = crypto_shash_alg(tfm); |
78 | unsigned long alignmask = crypto_shash_alignmask(tfm); |
79 | unsigned int unaligned_len = alignmask + 1 - |
80 | ((unsigned long)data & alignmask); |
81 | u8 ubuf[shash_align_buffer_size(unaligned_len, alignmask)] |
82 | __attribute__ ((aligned)); |
83 | u8 *buf = PTR_ALIGN(&ubuf[0], alignmask + 1); |
84 | int err; |
85 | |
86 | if (unaligned_len > len) |
87 | unaligned_len = len; |
88 | |
89 | memcpy(buf, data, unaligned_len); |
90 | err = shash->update(desc, buf, unaligned_len); |
91 | memset(buf, 0, unaligned_len); |
92 | |
93 | return err ?: |
94 | shash->update(desc, data + unaligned_len, len - unaligned_len); |
95 | } |
96 | |
97 | int crypto_shash_update(struct shash_desc *desc, const u8 *data, |
98 | unsigned int len) |
99 | { |
100 | struct crypto_shash *tfm = desc->tfm; |
101 | struct shash_alg *shash = crypto_shash_alg(tfm); |
102 | unsigned long alignmask = crypto_shash_alignmask(tfm); |
103 | |
104 | if ((unsigned long)data & alignmask) |
105 | return shash_update_unaligned(desc, data, len); |
106 | |
107 | return shash->update(desc, data, len); |
108 | } |
109 | EXPORT_SYMBOL_GPL(crypto_shash_update); |
110 | |
111 | static int shash_final_unaligned(struct shash_desc *desc, u8 *out) |
112 | { |
113 | struct crypto_shash *tfm = desc->tfm; |
114 | unsigned long alignmask = crypto_shash_alignmask(tfm); |
115 | struct shash_alg *shash = crypto_shash_alg(tfm); |
116 | unsigned int ds = crypto_shash_digestsize(tfm); |
117 | u8 ubuf[shash_align_buffer_size(ds, alignmask)] |
118 | __attribute__ ((aligned)); |
119 | u8 *buf = PTR_ALIGN(&ubuf[0], alignmask + 1); |
120 | int err; |
121 | |
122 | err = shash->final(desc, buf); |
123 | if (err) |
124 | goto out; |
125 | |
126 | memcpy(out, buf, ds); |
127 | |
128 | out: |
129 | memset(buf, 0, ds); |
130 | return err; |
131 | } |
132 | |
133 | int crypto_shash_final(struct shash_desc *desc, u8 *out) |
134 | { |
135 | struct crypto_shash *tfm = desc->tfm; |
136 | struct shash_alg *shash = crypto_shash_alg(tfm); |
137 | unsigned long alignmask = crypto_shash_alignmask(tfm); |
138 | |
139 | if ((unsigned long)out & alignmask) |
140 | return shash_final_unaligned(desc, out); |
141 | |
142 | return shash->final(desc, out); |
143 | } |
144 | EXPORT_SYMBOL_GPL(crypto_shash_final); |
145 | |
146 | static int shash_finup_unaligned(struct shash_desc *desc, const u8 *data, |
147 | unsigned int len, u8 *out) |
148 | { |
149 | return crypto_shash_update(desc, data, len) ?: |
150 | crypto_shash_final(desc, out); |
151 | } |
152 | |
153 | int crypto_shash_finup(struct shash_desc *desc, const u8 *data, |
154 | unsigned int len, u8 *out) |
155 | { |
156 | struct crypto_shash *tfm = desc->tfm; |
157 | struct shash_alg *shash = crypto_shash_alg(tfm); |
158 | unsigned long alignmask = crypto_shash_alignmask(tfm); |
159 | |
160 | if (((unsigned long)data | (unsigned long)out) & alignmask) |
161 | return shash_finup_unaligned(desc, data, len, out); |
162 | |
163 | return shash->finup(desc, data, len, out); |
164 | } |
165 | EXPORT_SYMBOL_GPL(crypto_shash_finup); |
166 | |
167 | static int shash_digest_unaligned(struct shash_desc *desc, const u8 *data, |
168 | unsigned int len, u8 *out) |
169 | { |
170 | return crypto_shash_init(desc) ?: |
171 | crypto_shash_finup(desc, data, len, out); |
172 | } |
173 | |
174 | int crypto_shash_digest(struct shash_desc *desc, const u8 *data, |
175 | unsigned int len, u8 *out) |
176 | { |
177 | struct crypto_shash *tfm = desc->tfm; |
178 | struct shash_alg *shash = crypto_shash_alg(tfm); |
179 | unsigned long alignmask = crypto_shash_alignmask(tfm); |
180 | |
181 | if (((unsigned long)data | (unsigned long)out) & alignmask) |
182 | return shash_digest_unaligned(desc, data, len, out); |
183 | |
184 | return shash->digest(desc, data, len, out); |
185 | } |
186 | EXPORT_SYMBOL_GPL(crypto_shash_digest); |
187 | |
188 | static int shash_default_export(struct shash_desc *desc, void *out) |
189 | { |
190 | memcpy(out, shash_desc_ctx(desc), crypto_shash_descsize(desc->tfm)); |
191 | return 0; |
192 | } |
193 | |
194 | static int shash_default_import(struct shash_desc *desc, const void *in) |
195 | { |
196 | memcpy(shash_desc_ctx(desc), in, crypto_shash_descsize(desc->tfm)); |
197 | return 0; |
198 | } |
199 | |
200 | static int shash_async_setkey(struct crypto_ahash *tfm, const u8 *key, |
201 | unsigned int keylen) |
202 | { |
203 | struct crypto_shash **ctx = crypto_ahash_ctx(tfm); |
204 | |
205 | return crypto_shash_setkey(*ctx, key, keylen); |
206 | } |
207 | |
208 | static int shash_async_init(struct ahash_request *req) |
209 | { |
210 | struct crypto_shash **ctx = crypto_ahash_ctx(crypto_ahash_reqtfm(req)); |
211 | struct shash_desc *desc = ahash_request_ctx(req); |
212 | |
213 | desc->tfm = *ctx; |
214 | desc->flags = req->base.flags; |
215 | |
216 | return crypto_shash_init(desc); |
217 | } |
218 | |
219 | int shash_ahash_update(struct ahash_request *req, struct shash_desc *desc) |
220 | { |
221 | struct crypto_hash_walk walk; |
222 | int nbytes; |
223 | |
224 | for (nbytes = crypto_hash_walk_first(req, &walk); nbytes > 0; |
225 | nbytes = crypto_hash_walk_done(&walk, nbytes)) |
226 | nbytes = crypto_shash_update(desc, walk.data, nbytes); |
227 | |
228 | return nbytes; |
229 | } |
230 | EXPORT_SYMBOL_GPL(shash_ahash_update); |
231 | |
232 | static int shash_async_update(struct ahash_request *req) |
233 | { |
234 | return shash_ahash_update(req, ahash_request_ctx(req)); |
235 | } |
236 | |
237 | static int shash_async_final(struct ahash_request *req) |
238 | { |
239 | return crypto_shash_final(ahash_request_ctx(req), req->result); |
240 | } |
241 | |
242 | int shash_ahash_finup(struct ahash_request *req, struct shash_desc *desc) |
243 | { |
244 | struct crypto_hash_walk walk; |
245 | int nbytes; |
246 | |
247 | nbytes = crypto_hash_walk_first(req, &walk); |
248 | if (!nbytes) |
249 | return crypto_shash_final(desc, req->result); |
250 | |
251 | do { |
252 | nbytes = crypto_hash_walk_last(&walk) ? |
253 | crypto_shash_finup(desc, walk.data, nbytes, |
254 | req->result) : |
255 | crypto_shash_update(desc, walk.data, nbytes); |
256 | nbytes = crypto_hash_walk_done(&walk, nbytes); |
257 | } while (nbytes > 0); |
258 | |
259 | return nbytes; |
260 | } |
261 | EXPORT_SYMBOL_GPL(shash_ahash_finup); |
262 | |
263 | static int shash_async_finup(struct ahash_request *req) |
264 | { |
265 | struct crypto_shash **ctx = crypto_ahash_ctx(crypto_ahash_reqtfm(req)); |
266 | struct shash_desc *desc = ahash_request_ctx(req); |
267 | |
268 | desc->tfm = *ctx; |
269 | desc->flags = req->base.flags; |
270 | |
271 | return shash_ahash_finup(req, desc); |
272 | } |
273 | |
274 | int shash_ahash_digest(struct ahash_request *req, struct shash_desc *desc) |
275 | { |
276 | struct scatterlist *sg = req->src; |
277 | unsigned int offset = sg->offset; |
278 | unsigned int nbytes = req->nbytes; |
279 | int err; |
280 | |
281 | if (nbytes < min(sg->length, ((unsigned int)(PAGE_SIZE)) - offset)) { |
282 | void *data; |
283 | |
284 | data = kmap_atomic(sg_page(sg)); |
285 | err = crypto_shash_digest(desc, data + offset, nbytes, |
286 | req->result); |
287 | kunmap_atomic(data); |
288 | crypto_yield(desc->flags); |
289 | } else |
290 | err = crypto_shash_init(desc) ?: |
291 | shash_ahash_finup(req, desc); |
292 | |
293 | return err; |
294 | } |
295 | EXPORT_SYMBOL_GPL(shash_ahash_digest); |
296 | |
297 | static int shash_async_digest(struct ahash_request *req) |
298 | { |
299 | struct crypto_shash **ctx = crypto_ahash_ctx(crypto_ahash_reqtfm(req)); |
300 | struct shash_desc *desc = ahash_request_ctx(req); |
301 | |
302 | desc->tfm = *ctx; |
303 | desc->flags = req->base.flags; |
304 | |
305 | return shash_ahash_digest(req, desc); |
306 | } |
307 | |
308 | static int shash_async_export(struct ahash_request *req, void *out) |
309 | { |
310 | return crypto_shash_export(ahash_request_ctx(req), out); |
311 | } |
312 | |
313 | static int shash_async_import(struct ahash_request *req, const void *in) |
314 | { |
315 | struct crypto_shash **ctx = crypto_ahash_ctx(crypto_ahash_reqtfm(req)); |
316 | struct shash_desc *desc = ahash_request_ctx(req); |
317 | |
318 | desc->tfm = *ctx; |
319 | desc->flags = req->base.flags; |
320 | |
321 | return crypto_shash_import(desc, in); |
322 | } |
323 | |
324 | static void crypto_exit_shash_ops_async(struct crypto_tfm *tfm) |
325 | { |
326 | struct crypto_shash **ctx = crypto_tfm_ctx(tfm); |
327 | |
328 | crypto_free_shash(*ctx); |
329 | } |
330 | |
331 | int crypto_init_shash_ops_async(struct crypto_tfm *tfm) |
332 | { |
333 | struct crypto_alg *calg = tfm->__crt_alg; |
334 | struct shash_alg *alg = __crypto_shash_alg(calg); |
335 | struct crypto_ahash *crt = __crypto_ahash_cast(tfm); |
336 | struct crypto_shash **ctx = crypto_tfm_ctx(tfm); |
337 | struct crypto_shash *shash; |
338 | |
339 | if (!crypto_mod_get(calg)) |
340 | return -EAGAIN; |
341 | |
342 | shash = crypto_create_tfm(calg, &crypto_shash_type); |
343 | if (IS_ERR(shash)) { |
344 | crypto_mod_put(calg); |
345 | return PTR_ERR(shash); |
346 | } |
347 | |
348 | *ctx = shash; |
349 | tfm->exit = crypto_exit_shash_ops_async; |
350 | |
351 | crt->init = shash_async_init; |
352 | crt->update = shash_async_update; |
353 | crt->final = shash_async_final; |
354 | crt->finup = shash_async_finup; |
355 | crt->digest = shash_async_digest; |
356 | |
357 | if (alg->setkey) |
358 | crt->setkey = shash_async_setkey; |
359 | if (alg->export) |
360 | crt->export = shash_async_export; |
361 | if (alg->import) |
362 | crt->import = shash_async_import; |
363 | |
364 | crt->reqsize = sizeof(struct shash_desc) + crypto_shash_descsize(shash); |
365 | |
366 | return 0; |
367 | } |
368 | |
369 | static int shash_compat_setkey(struct crypto_hash *tfm, const u8 *key, |
370 | unsigned int keylen) |
371 | { |
372 | struct shash_desc **descp = crypto_hash_ctx(tfm); |
373 | struct shash_desc *desc = *descp; |
374 | |
375 | return crypto_shash_setkey(desc->tfm, key, keylen); |
376 | } |
377 | |
378 | static int shash_compat_init(struct hash_desc *hdesc) |
379 | { |
380 | struct shash_desc **descp = crypto_hash_ctx(hdesc->tfm); |
381 | struct shash_desc *desc = *descp; |
382 | |
383 | desc->flags = hdesc->flags; |
384 | |
385 | return crypto_shash_init(desc); |
386 | } |
387 | |
388 | static int shash_compat_update(struct hash_desc *hdesc, struct scatterlist *sg, |
389 | unsigned int len) |
390 | { |
391 | struct shash_desc **descp = crypto_hash_ctx(hdesc->tfm); |
392 | struct shash_desc *desc = *descp; |
393 | struct crypto_hash_walk walk; |
394 | int nbytes; |
395 | |
396 | for (nbytes = crypto_hash_walk_first_compat(hdesc, &walk, sg, len); |
397 | nbytes > 0; nbytes = crypto_hash_walk_done(&walk, nbytes)) |
398 | nbytes = crypto_shash_update(desc, walk.data, nbytes); |
399 | |
400 | return nbytes; |
401 | } |
402 | |
403 | static int shash_compat_final(struct hash_desc *hdesc, u8 *out) |
404 | { |
405 | struct shash_desc **descp = crypto_hash_ctx(hdesc->tfm); |
406 | |
407 | return crypto_shash_final(*descp, out); |
408 | } |
409 | |
410 | static int shash_compat_digest(struct hash_desc *hdesc, struct scatterlist *sg, |
411 | unsigned int nbytes, u8 *out) |
412 | { |
413 | unsigned int offset = sg->offset; |
414 | int err; |
415 | |
416 | if (nbytes < min(sg->length, ((unsigned int)(PAGE_SIZE)) - offset)) { |
417 | struct shash_desc **descp = crypto_hash_ctx(hdesc->tfm); |
418 | struct shash_desc *desc = *descp; |
419 | void *data; |
420 | |
421 | desc->flags = hdesc->flags; |
422 | |
423 | data = kmap_atomic(sg_page(sg)); |
424 | err = crypto_shash_digest(desc, data + offset, nbytes, out); |
425 | kunmap_atomic(data); |
426 | crypto_yield(desc->flags); |
427 | goto out; |
428 | } |
429 | |
430 | err = shash_compat_init(hdesc); |
431 | if (err) |
432 | goto out; |
433 | |
434 | err = shash_compat_update(hdesc, sg, nbytes); |
435 | if (err) |
436 | goto out; |
437 | |
438 | err = shash_compat_final(hdesc, out); |
439 | |
440 | out: |
441 | return err; |
442 | } |
443 | |
444 | static void crypto_exit_shash_ops_compat(struct crypto_tfm *tfm) |
445 | { |
446 | struct shash_desc **descp = crypto_tfm_ctx(tfm); |
447 | struct shash_desc *desc = *descp; |
448 | |
449 | crypto_free_shash(desc->tfm); |
450 | kzfree(desc); |
451 | } |
452 | |
453 | static int crypto_init_shash_ops_compat(struct crypto_tfm *tfm) |
454 | { |
455 | struct hash_tfm *crt = &tfm->crt_hash; |
456 | struct crypto_alg *calg = tfm->__crt_alg; |
457 | struct shash_alg *alg = __crypto_shash_alg(calg); |
458 | struct shash_desc **descp = crypto_tfm_ctx(tfm); |
459 | struct crypto_shash *shash; |
460 | struct shash_desc *desc; |
461 | |
462 | if (!crypto_mod_get(calg)) |
463 | return -EAGAIN; |
464 | |
465 | shash = crypto_create_tfm(calg, &crypto_shash_type); |
466 | if (IS_ERR(shash)) { |
467 | crypto_mod_put(calg); |
468 | return PTR_ERR(shash); |
469 | } |
470 | |
471 | desc = kmalloc(sizeof(*desc) + crypto_shash_descsize(shash), |
472 | GFP_KERNEL); |
473 | if (!desc) { |
474 | crypto_free_shash(shash); |
475 | return -ENOMEM; |
476 | } |
477 | |
478 | *descp = desc; |
479 | desc->tfm = shash; |
480 | tfm->exit = crypto_exit_shash_ops_compat; |
481 | |
482 | crt->init = shash_compat_init; |
483 | crt->update = shash_compat_update; |
484 | crt->final = shash_compat_final; |
485 | crt->digest = shash_compat_digest; |
486 | crt->setkey = shash_compat_setkey; |
487 | |
488 | crt->digestsize = alg->digestsize; |
489 | |
490 | return 0; |
491 | } |
492 | |
493 | static int crypto_init_shash_ops(struct crypto_tfm *tfm, u32 type, u32 mask) |
494 | { |
495 | switch (mask & CRYPTO_ALG_TYPE_MASK) { |
496 | case CRYPTO_ALG_TYPE_HASH_MASK: |
497 | return crypto_init_shash_ops_compat(tfm); |
498 | } |
499 | |
500 | return -EINVAL; |
501 | } |
502 | |
503 | static unsigned int crypto_shash_ctxsize(struct crypto_alg *alg, u32 type, |
504 | u32 mask) |
505 | { |
506 | switch (mask & CRYPTO_ALG_TYPE_MASK) { |
507 | case CRYPTO_ALG_TYPE_HASH_MASK: |
508 | return sizeof(struct shash_desc *); |
509 | } |
510 | |
511 | return 0; |
512 | } |
513 | |
514 | static int crypto_shash_init_tfm(struct crypto_tfm *tfm) |
515 | { |
516 | struct crypto_shash *hash = __crypto_shash_cast(tfm); |
517 | |
518 | hash->descsize = crypto_shash_alg(hash)->descsize; |
519 | return 0; |
520 | } |
521 | |
522 | static unsigned int crypto_shash_extsize(struct crypto_alg *alg) |
523 | { |
524 | return alg->cra_ctxsize; |
525 | } |
526 | |
527 | #ifdef CONFIG_NET |
528 | static int crypto_shash_report(struct sk_buff *skb, struct crypto_alg *alg) |
529 | { |
530 | struct crypto_report_hash rhash; |
531 | struct shash_alg *salg = __crypto_shash_alg(alg); |
532 | |
533 | strncpy(rhash.type, "shash", sizeof(rhash.type)); |
534 | |
535 | rhash.blocksize = alg->cra_blocksize; |
536 | rhash.digestsize = salg->digestsize; |
537 | |
538 | if (nla_put(skb, CRYPTOCFGA_REPORT_HASH, |
539 | sizeof(struct crypto_report_hash), &rhash)) |
540 | goto nla_put_failure; |
541 | return 0; |
542 | |
543 | nla_put_failure: |
544 | return -EMSGSIZE; |
545 | } |
546 | #else |
547 | static int crypto_shash_report(struct sk_buff *skb, struct crypto_alg *alg) |
548 | { |
549 | return -ENOSYS; |
550 | } |
551 | #endif |
552 | |
553 | static void crypto_shash_show(struct seq_file *m, struct crypto_alg *alg) |
554 | __attribute__ ((unused)); |
555 | static void crypto_shash_show(struct seq_file *m, struct crypto_alg *alg) |
556 | { |
557 | struct shash_alg *salg = __crypto_shash_alg(alg); |
558 | |
559 | seq_printf(m, "type : shash\n"); |
560 | seq_printf(m, "blocksize : %u\n", alg->cra_blocksize); |
561 | seq_printf(m, "digestsize : %u\n", salg->digestsize); |
562 | } |
563 | |
564 | static const struct crypto_type crypto_shash_type = { |
565 | .ctxsize = crypto_shash_ctxsize, |
566 | .extsize = crypto_shash_extsize, |
567 | .init = crypto_init_shash_ops, |
568 | .init_tfm = crypto_shash_init_tfm, |
569 | #ifdef CONFIG_PROC_FS |
570 | .show = crypto_shash_show, |
571 | #endif |
572 | .report = crypto_shash_report, |
573 | .maskclear = ~CRYPTO_ALG_TYPE_MASK, |
574 | .maskset = CRYPTO_ALG_TYPE_MASK, |
575 | .type = CRYPTO_ALG_TYPE_SHASH, |
576 | .tfmsize = offsetof(struct crypto_shash, base), |
577 | }; |
578 | |
579 | struct crypto_shash *crypto_alloc_shash(const char *alg_name, u32 type, |
580 | u32 mask) |
581 | { |
582 | return crypto_alloc_tfm(alg_name, &crypto_shash_type, type, mask); |
583 | } |
584 | EXPORT_SYMBOL_GPL(crypto_alloc_shash); |
585 | |
586 | static int shash_prepare_alg(struct shash_alg *alg) |
587 | { |
588 | struct crypto_alg *base = &alg->base; |
589 | |
590 | if (alg->digestsize > PAGE_SIZE / 8 || |
591 | alg->descsize > PAGE_SIZE / 8 || |
592 | alg->statesize > PAGE_SIZE / 8) |
593 | return -EINVAL; |
594 | |
595 | base->cra_type = &crypto_shash_type; |
596 | base->cra_flags &= ~CRYPTO_ALG_TYPE_MASK; |
597 | base->cra_flags |= CRYPTO_ALG_TYPE_SHASH; |
598 | |
599 | if (!alg->finup) |
600 | alg->finup = shash_finup_unaligned; |
601 | if (!alg->digest) |
602 | alg->digest = shash_digest_unaligned; |
603 | if (!alg->export) { |
604 | alg->export = shash_default_export; |
605 | alg->import = shash_default_import; |
606 | alg->statesize = alg->descsize; |
607 | } |
608 | if (!alg->setkey) |
609 | alg->setkey = shash_no_setkey; |
610 | |
611 | return 0; |
612 | } |
613 | |
614 | int crypto_register_shash(struct shash_alg *alg) |
615 | { |
616 | struct crypto_alg *base = &alg->base; |
617 | int err; |
618 | |
619 | err = shash_prepare_alg(alg); |
620 | if (err) |
621 | return err; |
622 | |
623 | return crypto_register_alg(base); |
624 | } |
625 | EXPORT_SYMBOL_GPL(crypto_register_shash); |
626 | |
627 | int crypto_unregister_shash(struct shash_alg *alg) |
628 | { |
629 | return crypto_unregister_alg(&alg->base); |
630 | } |
631 | EXPORT_SYMBOL_GPL(crypto_unregister_shash); |
632 | |
633 | int crypto_register_shashes(struct shash_alg *algs, int count) |
634 | { |
635 | int i, ret; |
636 | |
637 | for (i = 0; i < count; i++) { |
638 | ret = crypto_register_shash(&algs[i]); |
639 | if (ret) |
640 | goto err; |
641 | } |
642 | |
643 | return 0; |
644 | |
645 | err: |
646 | for (--i; i >= 0; --i) |
647 | crypto_unregister_shash(&algs[i]); |
648 | |
649 | return ret; |
650 | } |
651 | EXPORT_SYMBOL_GPL(crypto_register_shashes); |
652 | |
653 | int crypto_unregister_shashes(struct shash_alg *algs, int count) |
654 | { |
655 | int i, ret; |
656 | |
657 | for (i = count - 1; i >= 0; --i) { |
658 | ret = crypto_unregister_shash(&algs[i]); |
659 | if (ret) |
660 | pr_err("Failed to unregister %s %s: %d\n", |
661 | algs[i].base.cra_driver_name, |
662 | algs[i].base.cra_name, ret); |
663 | } |
664 | |
665 | return 0; |
666 | } |
667 | EXPORT_SYMBOL_GPL(crypto_unregister_shashes); |
668 | |
669 | int shash_register_instance(struct crypto_template *tmpl, |
670 | struct shash_instance *inst) |
671 | { |
672 | int err; |
673 | |
674 | err = shash_prepare_alg(&inst->alg); |
675 | if (err) |
676 | return err; |
677 | |
678 | return crypto_register_instance(tmpl, shash_crypto_instance(inst)); |
679 | } |
680 | EXPORT_SYMBOL_GPL(shash_register_instance); |
681 | |
682 | void shash_free_instance(struct crypto_instance *inst) |
683 | { |
684 | crypto_drop_spawn(crypto_instance_ctx(inst)); |
685 | kfree(shash_instance(inst)); |
686 | } |
687 | EXPORT_SYMBOL_GPL(shash_free_instance); |
688 | |
689 | int crypto_init_shash_spawn(struct crypto_shash_spawn *spawn, |
690 | struct shash_alg *alg, |
691 | struct crypto_instance *inst) |
692 | { |
693 | return crypto_init_spawn2(&spawn->base, &alg->base, inst, |
694 | &crypto_shash_type); |
695 | } |
696 | EXPORT_SYMBOL_GPL(crypto_init_shash_spawn); |
697 | |
698 | struct shash_alg *shash_attr_alg(struct rtattr *rta, u32 type, u32 mask) |
699 | { |
700 | struct crypto_alg *alg; |
701 | |
702 | alg = crypto_attr_alg2(rta, &crypto_shash_type, type, mask); |
703 | return IS_ERR(alg) ? ERR_CAST(alg) : |
704 | container_of(alg, struct shash_alg, base); |
705 | } |
706 | EXPORT_SYMBOL_GPL(shash_attr_alg); |
707 | |
708 | MODULE_LICENSE("GPL"); |
709 | MODULE_DESCRIPTION("Synchronous cryptographic hash type"); |
710 |
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od-2011-09-04
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v2.6.34-rc5
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