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Commit | Line | Data |
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7b5a080b HX |
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 | ||
3b2f6df0 | 13 | #include <crypto/scatterwalk.h> |
7b5a080b HX |
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 | ||
3b2f6df0 HX |
21 | #include "internal.h" |
22 | ||
3f683d61 HX |
23 | static const struct crypto_type crypto_shash_type; |
24 | ||
57cfe44b HX |
25 | static int shash_no_setkey(struct crypto_shash *tfm, const u8 *key, |
26 | unsigned int keylen) | |
27 | { | |
28 | return -ENOSYS; | |
29 | } | |
30 | ||
7b5a080b HX |
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 | memset(alignbuffer, 0, keylen); | |
49 | kfree(buffer); | |
50 | return err; | |
51 | } | |
52 | ||
53 | int crypto_shash_setkey(struct crypto_shash *tfm, const u8 *key, | |
54 | unsigned int keylen) | |
55 | { | |
56 | struct shash_alg *shash = crypto_shash_alg(tfm); | |
57 | unsigned long alignmask = crypto_shash_alignmask(tfm); | |
58 | ||
59 | if ((unsigned long)key & alignmask) | |
60 | return shash_setkey_unaligned(tfm, key, keylen); | |
61 | ||
62 | return shash->setkey(tfm, key, keylen); | |
63 | } | |
64 | EXPORT_SYMBOL_GPL(crypto_shash_setkey); | |
65 | ||
66 | static inline unsigned int shash_align_buffer_size(unsigned len, | |
67 | unsigned long mask) | |
68 | { | |
69 | return len + (mask & ~(__alignof__(u8 __attribute__ ((aligned))) - 1)); | |
70 | } | |
71 | ||
72 | static int shash_update_unaligned(struct shash_desc *desc, const u8 *data, | |
73 | unsigned int len) | |
74 | { | |
75 | struct crypto_shash *tfm = desc->tfm; | |
76 | struct shash_alg *shash = crypto_shash_alg(tfm); | |
77 | unsigned long alignmask = crypto_shash_alignmask(tfm); | |
78 | unsigned int unaligned_len = alignmask + 1 - | |
79 | ((unsigned long)data & alignmask); | |
80 | u8 buf[shash_align_buffer_size(unaligned_len, alignmask)] | |
81 | __attribute__ ((aligned)); | |
82 | ||
f4f68993 YS |
83 | if (unaligned_len > len) |
84 | unaligned_len = len; | |
85 | ||
7b5a080b HX |
86 | memcpy(buf, data, unaligned_len); |
87 | ||
88 | return shash->update(desc, buf, unaligned_len) ?: | |
89 | shash->update(desc, data + unaligned_len, len - unaligned_len); | |
90 | } | |
91 | ||
92 | int crypto_shash_update(struct shash_desc *desc, const u8 *data, | |
93 | unsigned int len) | |
94 | { | |
95 | struct crypto_shash *tfm = desc->tfm; | |
96 | struct shash_alg *shash = crypto_shash_alg(tfm); | |
97 | unsigned long alignmask = crypto_shash_alignmask(tfm); | |
98 | ||
99 | if ((unsigned long)data & alignmask) | |
100 | return shash_update_unaligned(desc, data, len); | |
101 | ||
102 | return shash->update(desc, data, len); | |
103 | } | |
104 | EXPORT_SYMBOL_GPL(crypto_shash_update); | |
105 | ||
106 | static int shash_final_unaligned(struct shash_desc *desc, u8 *out) | |
107 | { | |
108 | struct crypto_shash *tfm = desc->tfm; | |
109 | unsigned long alignmask = crypto_shash_alignmask(tfm); | |
110 | struct shash_alg *shash = crypto_shash_alg(tfm); | |
111 | unsigned int ds = crypto_shash_digestsize(tfm); | |
112 | u8 buf[shash_align_buffer_size(ds, alignmask)] | |
113 | __attribute__ ((aligned)); | |
114 | int err; | |
115 | ||
116 | err = shash->final(desc, buf); | |
117 | memcpy(out, buf, ds); | |
118 | return err; | |
119 | } | |
120 | ||
121 | int crypto_shash_final(struct shash_desc *desc, u8 *out) | |
122 | { | |
123 | struct crypto_shash *tfm = desc->tfm; | |
124 | struct shash_alg *shash = crypto_shash_alg(tfm); | |
125 | unsigned long alignmask = crypto_shash_alignmask(tfm); | |
126 | ||
127 | if ((unsigned long)out & alignmask) | |
128 | return shash_final_unaligned(desc, out); | |
129 | ||
130 | return shash->final(desc, out); | |
131 | } | |
132 | EXPORT_SYMBOL_GPL(crypto_shash_final); | |
133 | ||
134 | static int shash_finup_unaligned(struct shash_desc *desc, const u8 *data, | |
135 | unsigned int len, u8 *out) | |
136 | { | |
137 | return crypto_shash_update(desc, data, len) ?: | |
138 | crypto_shash_final(desc, out); | |
139 | } | |
140 | ||
141 | int crypto_shash_finup(struct shash_desc *desc, const u8 *data, | |
142 | unsigned int len, u8 *out) | |
143 | { | |
144 | struct crypto_shash *tfm = desc->tfm; | |
145 | struct shash_alg *shash = crypto_shash_alg(tfm); | |
146 | unsigned long alignmask = crypto_shash_alignmask(tfm); | |
147 | ||
8267adab | 148 | if (((unsigned long)data | (unsigned long)out) & alignmask) |
7b5a080b HX |
149 | return shash_finup_unaligned(desc, data, len, out); |
150 | ||
151 | return shash->finup(desc, data, len, out); | |
152 | } | |
153 | EXPORT_SYMBOL_GPL(crypto_shash_finup); | |
154 | ||
155 | static int shash_digest_unaligned(struct shash_desc *desc, const u8 *data, | |
156 | unsigned int len, u8 *out) | |
157 | { | |
158 | return crypto_shash_init(desc) ?: | |
f88ad8de | 159 | crypto_shash_finup(desc, data, len, out); |
7b5a080b HX |
160 | } |
161 | ||
162 | int crypto_shash_digest(struct shash_desc *desc, const u8 *data, | |
163 | unsigned int len, u8 *out) | |
164 | { | |
165 | struct crypto_shash *tfm = desc->tfm; | |
166 | struct shash_alg *shash = crypto_shash_alg(tfm); | |
167 | unsigned long alignmask = crypto_shash_alignmask(tfm); | |
168 | ||
8267adab | 169 | if (((unsigned long)data | (unsigned long)out) & alignmask) |
7b5a080b HX |
170 | return shash_digest_unaligned(desc, data, len, out); |
171 | ||
172 | return shash->digest(desc, data, len, out); | |
173 | } | |
174 | EXPORT_SYMBOL_GPL(crypto_shash_digest); | |
175 | ||
99d27e1c | 176 | static int shash_no_export(struct shash_desc *desc, void *out) |
dec8b786 | 177 | { |
99d27e1c HX |
178 | return -ENOSYS; |
179 | } | |
dec8b786 | 180 | |
99d27e1c HX |
181 | static int shash_no_import(struct shash_desc *desc, const void *in) |
182 | { | |
183 | return -ENOSYS; | |
dec8b786 | 184 | } |
dec8b786 | 185 | |
3b2f6df0 HX |
186 | static int shash_async_setkey(struct crypto_ahash *tfm, const u8 *key, |
187 | unsigned int keylen) | |
188 | { | |
189 | struct crypto_shash **ctx = crypto_ahash_ctx(tfm); | |
190 | ||
191 | return crypto_shash_setkey(*ctx, key, keylen); | |
192 | } | |
193 | ||
194 | static int shash_async_init(struct ahash_request *req) | |
195 | { | |
196 | struct crypto_shash **ctx = crypto_ahash_ctx(crypto_ahash_reqtfm(req)); | |
197 | struct shash_desc *desc = ahash_request_ctx(req); | |
198 | ||
199 | desc->tfm = *ctx; | |
200 | desc->flags = req->base.flags; | |
201 | ||
202 | return crypto_shash_init(desc); | |
203 | } | |
204 | ||
205 | static int shash_async_update(struct ahash_request *req) | |
206 | { | |
207 | struct shash_desc *desc = ahash_request_ctx(req); | |
208 | struct crypto_hash_walk walk; | |
209 | int nbytes; | |
210 | ||
211 | for (nbytes = crypto_hash_walk_first(req, &walk); nbytes > 0; | |
212 | nbytes = crypto_hash_walk_done(&walk, nbytes)) | |
213 | nbytes = crypto_shash_update(desc, walk.data, nbytes); | |
214 | ||
215 | return nbytes; | |
216 | } | |
217 | ||
218 | static int shash_async_final(struct ahash_request *req) | |
219 | { | |
220 | return crypto_shash_final(ahash_request_ctx(req), req->result); | |
221 | } | |
222 | ||
223 | static int shash_async_digest(struct ahash_request *req) | |
224 | { | |
225 | struct scatterlist *sg = req->src; | |
226 | unsigned int offset = sg->offset; | |
227 | unsigned int nbytes = req->nbytes; | |
228 | int err; | |
229 | ||
230 | if (nbytes < min(sg->length, ((unsigned int)(PAGE_SIZE)) - offset)) { | |
231 | struct crypto_shash **ctx = | |
232 | crypto_ahash_ctx(crypto_ahash_reqtfm(req)); | |
233 | struct shash_desc *desc = ahash_request_ctx(req); | |
234 | void *data; | |
235 | ||
236 | desc->tfm = *ctx; | |
237 | desc->flags = req->base.flags; | |
238 | ||
239 | data = crypto_kmap(sg_page(sg), 0); | |
240 | err = crypto_shash_digest(desc, data + offset, nbytes, | |
241 | req->result); | |
242 | crypto_kunmap(data, 0); | |
243 | crypto_yield(desc->flags); | |
244 | goto out; | |
245 | } | |
246 | ||
247 | err = shash_async_init(req); | |
248 | if (err) | |
249 | goto out; | |
250 | ||
251 | err = shash_async_update(req); | |
252 | if (err) | |
253 | goto out; | |
254 | ||
255 | err = shash_async_final(req); | |
256 | ||
257 | out: | |
258 | return err; | |
259 | } | |
260 | ||
261 | static void crypto_exit_shash_ops_async(struct crypto_tfm *tfm) | |
262 | { | |
263 | struct crypto_shash **ctx = crypto_tfm_ctx(tfm); | |
264 | ||
265 | crypto_free_shash(*ctx); | |
266 | } | |
267 | ||
268 | static int crypto_init_shash_ops_async(struct crypto_tfm *tfm) | |
269 | { | |
270 | struct crypto_alg *calg = tfm->__crt_alg; | |
271 | struct shash_alg *alg = __crypto_shash_alg(calg); | |
272 | struct ahash_tfm *crt = &tfm->crt_ahash; | |
273 | struct crypto_shash **ctx = crypto_tfm_ctx(tfm); | |
274 | struct crypto_shash *shash; | |
275 | ||
276 | if (!crypto_mod_get(calg)) | |
277 | return -EAGAIN; | |
278 | ||
3f683d61 | 279 | shash = crypto_create_tfm(calg, &crypto_shash_type); |
3b2f6df0 HX |
280 | if (IS_ERR(shash)) { |
281 | crypto_mod_put(calg); | |
282 | return PTR_ERR(shash); | |
283 | } | |
284 | ||
285 | *ctx = shash; | |
286 | tfm->exit = crypto_exit_shash_ops_async; | |
287 | ||
288 | crt->init = shash_async_init; | |
289 | crt->update = shash_async_update; | |
290 | crt->final = shash_async_final; | |
291 | crt->digest = shash_async_digest; | |
292 | crt->setkey = shash_async_setkey; | |
293 | ||
294 | crt->digestsize = alg->digestsize; | |
295 | crt->reqsize = sizeof(struct shash_desc) + crypto_shash_descsize(shash); | |
296 | ||
297 | return 0; | |
298 | } | |
299 | ||
5f7082ed HX |
300 | static int shash_compat_setkey(struct crypto_hash *tfm, const u8 *key, |
301 | unsigned int keylen) | |
302 | { | |
303 | struct shash_desc *desc = crypto_hash_ctx(tfm); | |
304 | ||
305 | return crypto_shash_setkey(desc->tfm, key, keylen); | |
306 | } | |
307 | ||
308 | static int shash_compat_init(struct hash_desc *hdesc) | |
309 | { | |
310 | struct shash_desc *desc = crypto_hash_ctx(hdesc->tfm); | |
311 | ||
312 | desc->flags = hdesc->flags; | |
313 | ||
314 | return crypto_shash_init(desc); | |
315 | } | |
316 | ||
317 | static int shash_compat_update(struct hash_desc *hdesc, struct scatterlist *sg, | |
318 | unsigned int len) | |
319 | { | |
320 | struct shash_desc *desc = crypto_hash_ctx(hdesc->tfm); | |
321 | struct crypto_hash_walk walk; | |
322 | int nbytes; | |
323 | ||
324 | for (nbytes = crypto_hash_walk_first_compat(hdesc, &walk, sg, len); | |
325 | nbytes > 0; nbytes = crypto_hash_walk_done(&walk, nbytes)) | |
326 | nbytes = crypto_shash_update(desc, walk.data, nbytes); | |
327 | ||
328 | return nbytes; | |
329 | } | |
330 | ||
331 | static int shash_compat_final(struct hash_desc *hdesc, u8 *out) | |
332 | { | |
333 | return crypto_shash_final(crypto_hash_ctx(hdesc->tfm), out); | |
334 | } | |
335 | ||
336 | static int shash_compat_digest(struct hash_desc *hdesc, struct scatterlist *sg, | |
337 | unsigned int nbytes, u8 *out) | |
338 | { | |
339 | unsigned int offset = sg->offset; | |
340 | int err; | |
341 | ||
342 | if (nbytes < min(sg->length, ((unsigned int)(PAGE_SIZE)) - offset)) { | |
343 | struct shash_desc *desc = crypto_hash_ctx(hdesc->tfm); | |
344 | void *data; | |
345 | ||
346 | desc->flags = hdesc->flags; | |
347 | ||
348 | data = crypto_kmap(sg_page(sg), 0); | |
349 | err = crypto_shash_digest(desc, data + offset, nbytes, out); | |
350 | crypto_kunmap(data, 0); | |
351 | crypto_yield(desc->flags); | |
352 | goto out; | |
353 | } | |
354 | ||
355 | err = shash_compat_init(hdesc); | |
356 | if (err) | |
357 | goto out; | |
358 | ||
359 | err = shash_compat_update(hdesc, sg, nbytes); | |
360 | if (err) | |
361 | goto out; | |
362 | ||
363 | err = shash_compat_final(hdesc, out); | |
364 | ||
365 | out: | |
366 | return err; | |
367 | } | |
368 | ||
369 | static void crypto_exit_shash_ops_compat(struct crypto_tfm *tfm) | |
370 | { | |
371 | struct shash_desc *desc= crypto_tfm_ctx(tfm); | |
372 | ||
373 | crypto_free_shash(desc->tfm); | |
374 | } | |
375 | ||
376 | static int crypto_init_shash_ops_compat(struct crypto_tfm *tfm) | |
377 | { | |
378 | struct hash_tfm *crt = &tfm->crt_hash; | |
379 | struct crypto_alg *calg = tfm->__crt_alg; | |
380 | struct shash_alg *alg = __crypto_shash_alg(calg); | |
381 | struct shash_desc *desc = crypto_tfm_ctx(tfm); | |
382 | struct crypto_shash *shash; | |
383 | ||
4abfd73e AKR |
384 | if (!crypto_mod_get(calg)) |
385 | return -EAGAIN; | |
386 | ||
3f683d61 | 387 | shash = crypto_create_tfm(calg, &crypto_shash_type); |
4abfd73e AKR |
388 | if (IS_ERR(shash)) { |
389 | crypto_mod_put(calg); | |
5f7082ed | 390 | return PTR_ERR(shash); |
4abfd73e | 391 | } |
5f7082ed HX |
392 | |
393 | desc->tfm = shash; | |
394 | tfm->exit = crypto_exit_shash_ops_compat; | |
395 | ||
396 | crt->init = shash_compat_init; | |
397 | crt->update = shash_compat_update; | |
398 | crt->final = shash_compat_final; | |
399 | crt->digest = shash_compat_digest; | |
400 | crt->setkey = shash_compat_setkey; | |
401 | ||
402 | crt->digestsize = alg->digestsize; | |
403 | ||
404 | return 0; | |
405 | } | |
406 | ||
3b2f6df0 HX |
407 | static int crypto_init_shash_ops(struct crypto_tfm *tfm, u32 type, u32 mask) |
408 | { | |
409 | switch (mask & CRYPTO_ALG_TYPE_MASK) { | |
5f7082ed HX |
410 | case CRYPTO_ALG_TYPE_HASH_MASK: |
411 | return crypto_init_shash_ops_compat(tfm); | |
3b2f6df0 HX |
412 | case CRYPTO_ALG_TYPE_AHASH_MASK: |
413 | return crypto_init_shash_ops_async(tfm); | |
414 | } | |
415 | ||
416 | return -EINVAL; | |
417 | } | |
418 | ||
419 | static unsigned int crypto_shash_ctxsize(struct crypto_alg *alg, u32 type, | |
420 | u32 mask) | |
421 | { | |
5f7082ed HX |
422 | struct shash_alg *salg = __crypto_shash_alg(alg); |
423 | ||
3b2f6df0 | 424 | switch (mask & CRYPTO_ALG_TYPE_MASK) { |
5f7082ed HX |
425 | case CRYPTO_ALG_TYPE_HASH_MASK: |
426 | return sizeof(struct shash_desc) + salg->descsize; | |
3b2f6df0 HX |
427 | case CRYPTO_ALG_TYPE_AHASH_MASK: |
428 | return sizeof(struct crypto_shash *); | |
429 | } | |
430 | ||
431 | return 0; | |
432 | } | |
433 | ||
7b5a080b HX |
434 | static int crypto_shash_init_tfm(struct crypto_tfm *tfm, |
435 | const struct crypto_type *frontend) | |
436 | { | |
7b5a080b HX |
437 | return 0; |
438 | } | |
439 | ||
440 | static unsigned int crypto_shash_extsize(struct crypto_alg *alg, | |
441 | const struct crypto_type *frontend) | |
442 | { | |
443 | return alg->cra_ctxsize; | |
444 | } | |
445 | ||
446 | static void crypto_shash_show(struct seq_file *m, struct crypto_alg *alg) | |
447 | __attribute__ ((unused)); | |
448 | static void crypto_shash_show(struct seq_file *m, struct crypto_alg *alg) | |
449 | { | |
450 | struct shash_alg *salg = __crypto_shash_alg(alg); | |
451 | ||
452 | seq_printf(m, "type : shash\n"); | |
453 | seq_printf(m, "blocksize : %u\n", alg->cra_blocksize); | |
454 | seq_printf(m, "digestsize : %u\n", salg->digestsize); | |
455 | seq_printf(m, "descsize : %u\n", salg->descsize); | |
456 | } | |
457 | ||
458 | static const struct crypto_type crypto_shash_type = { | |
3b2f6df0 | 459 | .ctxsize = crypto_shash_ctxsize, |
7b5a080b | 460 | .extsize = crypto_shash_extsize, |
3b2f6df0 | 461 | .init = crypto_init_shash_ops, |
7b5a080b HX |
462 | .init_tfm = crypto_shash_init_tfm, |
463 | #ifdef CONFIG_PROC_FS | |
464 | .show = crypto_shash_show, | |
465 | #endif | |
466 | .maskclear = ~CRYPTO_ALG_TYPE_MASK, | |
467 | .maskset = CRYPTO_ALG_TYPE_MASK, | |
468 | .type = CRYPTO_ALG_TYPE_SHASH, | |
469 | .tfmsize = offsetof(struct crypto_shash, base), | |
470 | }; | |
471 | ||
472 | struct crypto_shash *crypto_alloc_shash(const char *alg_name, u32 type, | |
473 | u32 mask) | |
474 | { | |
3f683d61 | 475 | return crypto_alloc_tfm(alg_name, &crypto_shash_type, type, mask); |
7b5a080b HX |
476 | } |
477 | EXPORT_SYMBOL_GPL(crypto_alloc_shash); | |
478 | ||
619a6ebd | 479 | static int shash_prepare_alg(struct shash_alg *alg) |
7b5a080b HX |
480 | { |
481 | struct crypto_alg *base = &alg->base; | |
482 | ||
483 | if (alg->digestsize > PAGE_SIZE / 8 || | |
99d27e1c HX |
484 | alg->descsize > PAGE_SIZE / 8 || |
485 | alg->statesize > PAGE_SIZE / 8) | |
7b5a080b HX |
486 | return -EINVAL; |
487 | ||
488 | base->cra_type = &crypto_shash_type; | |
489 | base->cra_flags &= ~CRYPTO_ALG_TYPE_MASK; | |
490 | base->cra_flags |= CRYPTO_ALG_TYPE_SHASH; | |
99d27e1c | 491 | |
8267adab HX |
492 | if (!alg->finup) |
493 | alg->finup = shash_finup_unaligned; | |
494 | if (!alg->digest) | |
495 | alg->digest = shash_digest_unaligned; | |
99d27e1c HX |
496 | if (!alg->import) |
497 | alg->import = shash_no_import; | |
498 | if (!alg->export) | |
499 | alg->export = shash_no_export; | |
57cfe44b HX |
500 | if (!alg->setkey) |
501 | alg->setkey = shash_no_setkey; | |
99d27e1c | 502 | |
619a6ebd HX |
503 | return 0; |
504 | } | |
505 | ||
506 | int crypto_register_shash(struct shash_alg *alg) | |
507 | { | |
508 | struct crypto_alg *base = &alg->base; | |
509 | int err; | |
510 | ||
511 | err = shash_prepare_alg(alg); | |
512 | if (err) | |
513 | return err; | |
7b5a080b HX |
514 | |
515 | return crypto_register_alg(base); | |
516 | } | |
517 | EXPORT_SYMBOL_GPL(crypto_register_shash); | |
518 | ||
519 | int crypto_unregister_shash(struct shash_alg *alg) | |
520 | { | |
521 | return crypto_unregister_alg(&alg->base); | |
522 | } | |
523 | EXPORT_SYMBOL_GPL(crypto_unregister_shash); | |
524 | ||
619a6ebd HX |
525 | int shash_register_instance(struct crypto_template *tmpl, |
526 | struct shash_instance *inst) | |
527 | { | |
528 | int err; | |
529 | ||
530 | err = shash_prepare_alg(&inst->alg); | |
531 | if (err) | |
532 | return err; | |
533 | ||
534 | return crypto_register_instance(tmpl, shash_crypto_instance(inst)); | |
535 | } | |
536 | EXPORT_SYMBOL_GPL(shash_register_instance); | |
537 | ||
2e4fddd8 HX |
538 | void shash_free_instance(struct crypto_instance *inst) |
539 | { | |
540 | crypto_drop_spawn(crypto_instance_ctx(inst)); | |
541 | kfree(shash_instance(inst)); | |
542 | } | |
543 | EXPORT_SYMBOL_GPL(shash_free_instance); | |
544 | ||
94296999 HX |
545 | int crypto_init_shash_spawn(struct crypto_shash_spawn *spawn, |
546 | struct shash_alg *alg, | |
547 | struct crypto_instance *inst) | |
548 | { | |
549 | return crypto_init_spawn2(&spawn->base, &alg->base, inst, | |
550 | &crypto_shash_type); | |
551 | } | |
552 | EXPORT_SYMBOL_GPL(crypto_init_shash_spawn); | |
553 | ||
7d6f5640 HX |
554 | struct shash_alg *shash_attr_alg(struct rtattr *rta, u32 type, u32 mask) |
555 | { | |
556 | struct crypto_alg *alg; | |
557 | ||
558 | alg = crypto_attr_alg2(rta, &crypto_shash_type, type, mask); | |
559 | return IS_ERR(alg) ? ERR_CAST(alg) : | |
560 | container_of(alg, struct shash_alg, base); | |
561 | } | |
562 | EXPORT_SYMBOL_GPL(shash_attr_alg); | |
563 | ||
7b5a080b HX |
564 | MODULE_LICENSE("GPL"); |
565 | MODULE_DESCRIPTION("Synchronous cryptographic hash type"); |