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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); | |
8c32c516 | 48 | kzfree(buffer); |
7b5a080b HX |
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 buf[shash_align_buffer_size(unaligned_len, alignmask)] | |
80 | __attribute__ ((aligned)); | |
8c32c516 | 81 | int err; |
7b5a080b | 82 | |
f4f68993 YS |
83 | if (unaligned_len > len) |
84 | unaligned_len = len; | |
85 | ||
7b5a080b | 86 | memcpy(buf, data, unaligned_len); |
8c32c516 HX |
87 | err = shash->update(desc, buf, unaligned_len); |
88 | memset(buf, 0, unaligned_len); | |
7b5a080b | 89 | |
8c32c516 | 90 | return err ?: |
7b5a080b HX |
91 | shash->update(desc, data + unaligned_len, len - unaligned_len); |
92 | } | |
93 | ||
94 | int crypto_shash_update(struct shash_desc *desc, const u8 *data, | |
95 | unsigned int len) | |
96 | { | |
97 | struct crypto_shash *tfm = desc->tfm; | |
98 | struct shash_alg *shash = crypto_shash_alg(tfm); | |
99 | unsigned long alignmask = crypto_shash_alignmask(tfm); | |
100 | ||
101 | if ((unsigned long)data & alignmask) | |
102 | return shash_update_unaligned(desc, data, len); | |
103 | ||
104 | return shash->update(desc, data, len); | |
105 | } | |
106 | EXPORT_SYMBOL_GPL(crypto_shash_update); | |
107 | ||
108 | static int shash_final_unaligned(struct shash_desc *desc, u8 *out) | |
109 | { | |
110 | struct crypto_shash *tfm = desc->tfm; | |
111 | unsigned long alignmask = crypto_shash_alignmask(tfm); | |
112 | struct shash_alg *shash = crypto_shash_alg(tfm); | |
113 | unsigned int ds = crypto_shash_digestsize(tfm); | |
114 | u8 buf[shash_align_buffer_size(ds, alignmask)] | |
115 | __attribute__ ((aligned)); | |
116 | int err; | |
117 | ||
118 | err = shash->final(desc, buf); | |
8c32c516 HX |
119 | if (err) |
120 | goto out; | |
121 | ||
7b5a080b | 122 | memcpy(out, buf, ds); |
8c32c516 HX |
123 | |
124 | out: | |
125 | memset(buf, 0, ds); | |
7b5a080b HX |
126 | return err; |
127 | } | |
128 | ||
129 | int crypto_shash_final(struct shash_desc *desc, u8 *out) | |
130 | { | |
131 | struct crypto_shash *tfm = desc->tfm; | |
132 | struct shash_alg *shash = crypto_shash_alg(tfm); | |
133 | unsigned long alignmask = crypto_shash_alignmask(tfm); | |
134 | ||
135 | if ((unsigned long)out & alignmask) | |
136 | return shash_final_unaligned(desc, out); | |
137 | ||
138 | return shash->final(desc, out); | |
139 | } | |
140 | EXPORT_SYMBOL_GPL(crypto_shash_final); | |
141 | ||
142 | static int shash_finup_unaligned(struct shash_desc *desc, const u8 *data, | |
143 | unsigned int len, u8 *out) | |
144 | { | |
145 | return crypto_shash_update(desc, data, len) ?: | |
146 | crypto_shash_final(desc, out); | |
147 | } | |
148 | ||
149 | int crypto_shash_finup(struct shash_desc *desc, const u8 *data, | |
150 | unsigned int len, u8 *out) | |
151 | { | |
152 | struct crypto_shash *tfm = desc->tfm; | |
153 | struct shash_alg *shash = crypto_shash_alg(tfm); | |
154 | unsigned long alignmask = crypto_shash_alignmask(tfm); | |
155 | ||
8267adab | 156 | if (((unsigned long)data | (unsigned long)out) & alignmask) |
7b5a080b HX |
157 | return shash_finup_unaligned(desc, data, len, out); |
158 | ||
159 | return shash->finup(desc, data, len, out); | |
160 | } | |
161 | EXPORT_SYMBOL_GPL(crypto_shash_finup); | |
162 | ||
163 | static int shash_digest_unaligned(struct shash_desc *desc, const u8 *data, | |
164 | unsigned int len, u8 *out) | |
165 | { | |
166 | return crypto_shash_init(desc) ?: | |
f88ad8de | 167 | crypto_shash_finup(desc, data, len, out); |
7b5a080b HX |
168 | } |
169 | ||
170 | int crypto_shash_digest(struct shash_desc *desc, const u8 *data, | |
171 | unsigned int len, u8 *out) | |
172 | { | |
173 | struct crypto_shash *tfm = desc->tfm; | |
174 | struct shash_alg *shash = crypto_shash_alg(tfm); | |
175 | unsigned long alignmask = crypto_shash_alignmask(tfm); | |
176 | ||
8267adab | 177 | if (((unsigned long)data | (unsigned long)out) & alignmask) |
7b5a080b HX |
178 | return shash_digest_unaligned(desc, data, len, out); |
179 | ||
180 | return shash->digest(desc, data, len, out); | |
181 | } | |
182 | EXPORT_SYMBOL_GPL(crypto_shash_digest); | |
183 | ||
99d27e1c | 184 | static int shash_no_export(struct shash_desc *desc, void *out) |
dec8b786 | 185 | { |
99d27e1c HX |
186 | return -ENOSYS; |
187 | } | |
dec8b786 | 188 | |
99d27e1c HX |
189 | static int shash_no_import(struct shash_desc *desc, const void *in) |
190 | { | |
191 | return -ENOSYS; | |
dec8b786 | 192 | } |
dec8b786 | 193 | |
3b2f6df0 HX |
194 | static int shash_async_setkey(struct crypto_ahash *tfm, const u8 *key, |
195 | unsigned int keylen) | |
196 | { | |
197 | struct crypto_shash **ctx = crypto_ahash_ctx(tfm); | |
198 | ||
199 | return crypto_shash_setkey(*ctx, key, keylen); | |
200 | } | |
201 | ||
202 | static int shash_async_init(struct ahash_request *req) | |
203 | { | |
204 | struct crypto_shash **ctx = crypto_ahash_ctx(crypto_ahash_reqtfm(req)); | |
205 | struct shash_desc *desc = ahash_request_ctx(req); | |
206 | ||
207 | desc->tfm = *ctx; | |
208 | desc->flags = req->base.flags; | |
209 | ||
210 | return crypto_shash_init(desc); | |
211 | } | |
212 | ||
7eddf95e | 213 | int shash_ahash_update(struct ahash_request *req, struct shash_desc *desc) |
3b2f6df0 | 214 | { |
3b2f6df0 HX |
215 | struct crypto_hash_walk walk; |
216 | int nbytes; | |
217 | ||
218 | for (nbytes = crypto_hash_walk_first(req, &walk); nbytes > 0; | |
219 | nbytes = crypto_hash_walk_done(&walk, nbytes)) | |
220 | nbytes = crypto_shash_update(desc, walk.data, nbytes); | |
221 | ||
222 | return nbytes; | |
223 | } | |
7eddf95e HX |
224 | EXPORT_SYMBOL_GPL(shash_ahash_update); |
225 | ||
226 | static int shash_async_update(struct ahash_request *req) | |
227 | { | |
228 | return shash_ahash_update(req, ahash_request_ctx(req)); | |
229 | } | |
3b2f6df0 HX |
230 | |
231 | static int shash_async_final(struct ahash_request *req) | |
232 | { | |
233 | return crypto_shash_final(ahash_request_ctx(req), req->result); | |
234 | } | |
235 | ||
7eddf95e | 236 | int shash_ahash_digest(struct ahash_request *req, struct shash_desc *desc) |
3b2f6df0 HX |
237 | { |
238 | struct scatterlist *sg = req->src; | |
239 | unsigned int offset = sg->offset; | |
240 | unsigned int nbytes = req->nbytes; | |
241 | int err; | |
242 | ||
243 | if (nbytes < min(sg->length, ((unsigned int)(PAGE_SIZE)) - offset)) { | |
3b2f6df0 HX |
244 | void *data; |
245 | ||
3b2f6df0 HX |
246 | data = crypto_kmap(sg_page(sg), 0); |
247 | err = crypto_shash_digest(desc, data + offset, nbytes, | |
248 | req->result); | |
249 | crypto_kunmap(data, 0); | |
250 | crypto_yield(desc->flags); | |
7eddf95e HX |
251 | } else |
252 | err = crypto_shash_init(desc) ?: | |
253 | shash_ahash_update(req, desc) ?: | |
254 | crypto_shash_final(desc, req->result); | |
3b2f6df0 | 255 | |
7eddf95e HX |
256 | return err; |
257 | } | |
258 | EXPORT_SYMBOL_GPL(shash_ahash_digest); | |
3b2f6df0 | 259 | |
7eddf95e HX |
260 | static int shash_async_digest(struct ahash_request *req) |
261 | { | |
262 | struct crypto_shash **ctx = crypto_ahash_ctx(crypto_ahash_reqtfm(req)); | |
263 | struct shash_desc *desc = ahash_request_ctx(req); | |
3b2f6df0 | 264 | |
7eddf95e HX |
265 | desc->tfm = *ctx; |
266 | desc->flags = req->base.flags; | |
3b2f6df0 | 267 | |
7eddf95e | 268 | return shash_ahash_digest(req, desc); |
3b2f6df0 HX |
269 | } |
270 | ||
271 | static void crypto_exit_shash_ops_async(struct crypto_tfm *tfm) | |
272 | { | |
273 | struct crypto_shash **ctx = crypto_tfm_ctx(tfm); | |
274 | ||
275 | crypto_free_shash(*ctx); | |
276 | } | |
277 | ||
88056ec3 | 278 | int crypto_init_shash_ops_async(struct crypto_tfm *tfm) |
3b2f6df0 HX |
279 | { |
280 | struct crypto_alg *calg = tfm->__crt_alg; | |
88056ec3 | 281 | struct crypto_ahash *crt = __crypto_ahash_cast(tfm); |
3b2f6df0 HX |
282 | struct crypto_shash **ctx = crypto_tfm_ctx(tfm); |
283 | struct crypto_shash *shash; | |
284 | ||
285 | if (!crypto_mod_get(calg)) | |
286 | return -EAGAIN; | |
287 | ||
3f683d61 | 288 | shash = crypto_create_tfm(calg, &crypto_shash_type); |
3b2f6df0 HX |
289 | if (IS_ERR(shash)) { |
290 | crypto_mod_put(calg); | |
291 | return PTR_ERR(shash); | |
292 | } | |
293 | ||
294 | *ctx = shash; | |
295 | tfm->exit = crypto_exit_shash_ops_async; | |
296 | ||
297 | crt->init = shash_async_init; | |
298 | crt->update = shash_async_update; | |
299 | crt->final = shash_async_final; | |
300 | crt->digest = shash_async_digest; | |
301 | crt->setkey = shash_async_setkey; | |
302 | ||
3b2f6df0 HX |
303 | crt->reqsize = sizeof(struct shash_desc) + crypto_shash_descsize(shash); |
304 | ||
305 | return 0; | |
306 | } | |
307 | ||
5f7082ed HX |
308 | static int shash_compat_setkey(struct crypto_hash *tfm, const u8 *key, |
309 | unsigned int keylen) | |
310 | { | |
113adefc HX |
311 | struct shash_desc **descp = crypto_hash_ctx(tfm); |
312 | struct shash_desc *desc = *descp; | |
5f7082ed HX |
313 | |
314 | return crypto_shash_setkey(desc->tfm, key, keylen); | |
315 | } | |
316 | ||
317 | static int shash_compat_init(struct hash_desc *hdesc) | |
318 | { | |
113adefc HX |
319 | struct shash_desc **descp = crypto_hash_ctx(hdesc->tfm); |
320 | struct shash_desc *desc = *descp; | |
5f7082ed HX |
321 | |
322 | desc->flags = hdesc->flags; | |
323 | ||
324 | return crypto_shash_init(desc); | |
325 | } | |
326 | ||
327 | static int shash_compat_update(struct hash_desc *hdesc, struct scatterlist *sg, | |
328 | unsigned int len) | |
329 | { | |
113adefc HX |
330 | struct shash_desc **descp = crypto_hash_ctx(hdesc->tfm); |
331 | struct shash_desc *desc = *descp; | |
5f7082ed HX |
332 | struct crypto_hash_walk walk; |
333 | int nbytes; | |
334 | ||
335 | for (nbytes = crypto_hash_walk_first_compat(hdesc, &walk, sg, len); | |
336 | nbytes > 0; nbytes = crypto_hash_walk_done(&walk, nbytes)) | |
337 | nbytes = crypto_shash_update(desc, walk.data, nbytes); | |
338 | ||
339 | return nbytes; | |
340 | } | |
341 | ||
342 | static int shash_compat_final(struct hash_desc *hdesc, u8 *out) | |
343 | { | |
113adefc HX |
344 | struct shash_desc **descp = crypto_hash_ctx(hdesc->tfm); |
345 | ||
346 | return crypto_shash_final(*descp, out); | |
5f7082ed HX |
347 | } |
348 | ||
349 | static int shash_compat_digest(struct hash_desc *hdesc, struct scatterlist *sg, | |
350 | unsigned int nbytes, u8 *out) | |
351 | { | |
352 | unsigned int offset = sg->offset; | |
353 | int err; | |
354 | ||
355 | if (nbytes < min(sg->length, ((unsigned int)(PAGE_SIZE)) - offset)) { | |
113adefc HX |
356 | struct shash_desc **descp = crypto_hash_ctx(hdesc->tfm); |
357 | struct shash_desc *desc = *descp; | |
5f7082ed HX |
358 | void *data; |
359 | ||
360 | desc->flags = hdesc->flags; | |
361 | ||
362 | data = crypto_kmap(sg_page(sg), 0); | |
363 | err = crypto_shash_digest(desc, data + offset, nbytes, out); | |
364 | crypto_kunmap(data, 0); | |
365 | crypto_yield(desc->flags); | |
366 | goto out; | |
367 | } | |
368 | ||
369 | err = shash_compat_init(hdesc); | |
370 | if (err) | |
371 | goto out; | |
372 | ||
373 | err = shash_compat_update(hdesc, sg, nbytes); | |
374 | if (err) | |
375 | goto out; | |
376 | ||
377 | err = shash_compat_final(hdesc, out); | |
378 | ||
379 | out: | |
380 | return err; | |
381 | } | |
382 | ||
383 | static void crypto_exit_shash_ops_compat(struct crypto_tfm *tfm) | |
384 | { | |
113adefc HX |
385 | struct shash_desc **descp = crypto_tfm_ctx(tfm); |
386 | struct shash_desc *desc = *descp; | |
5f7082ed HX |
387 | |
388 | crypto_free_shash(desc->tfm); | |
113adefc | 389 | kzfree(desc); |
5f7082ed HX |
390 | } |
391 | ||
392 | static int crypto_init_shash_ops_compat(struct crypto_tfm *tfm) | |
393 | { | |
394 | struct hash_tfm *crt = &tfm->crt_hash; | |
395 | struct crypto_alg *calg = tfm->__crt_alg; | |
396 | struct shash_alg *alg = __crypto_shash_alg(calg); | |
113adefc | 397 | struct shash_desc **descp = crypto_tfm_ctx(tfm); |
5f7082ed | 398 | struct crypto_shash *shash; |
113adefc | 399 | struct shash_desc *desc; |
5f7082ed | 400 | |
4abfd73e AKR |
401 | if (!crypto_mod_get(calg)) |
402 | return -EAGAIN; | |
403 | ||
3f683d61 | 404 | shash = crypto_create_tfm(calg, &crypto_shash_type); |
4abfd73e AKR |
405 | if (IS_ERR(shash)) { |
406 | crypto_mod_put(calg); | |
5f7082ed | 407 | return PTR_ERR(shash); |
4abfd73e | 408 | } |
5f7082ed | 409 | |
113adefc HX |
410 | desc = kmalloc(sizeof(*desc) + crypto_shash_descsize(shash), |
411 | GFP_KERNEL); | |
412 | if (!desc) { | |
413 | crypto_free_shash(shash); | |
414 | return -ENOMEM; | |
415 | } | |
416 | ||
417 | *descp = desc; | |
5f7082ed HX |
418 | desc->tfm = shash; |
419 | tfm->exit = crypto_exit_shash_ops_compat; | |
420 | ||
421 | crt->init = shash_compat_init; | |
422 | crt->update = shash_compat_update; | |
423 | crt->final = shash_compat_final; | |
424 | crt->digest = shash_compat_digest; | |
425 | crt->setkey = shash_compat_setkey; | |
426 | ||
427 | crt->digestsize = alg->digestsize; | |
428 | ||
429 | return 0; | |
430 | } | |
431 | ||
3b2f6df0 HX |
432 | static int crypto_init_shash_ops(struct crypto_tfm *tfm, u32 type, u32 mask) |
433 | { | |
434 | switch (mask & CRYPTO_ALG_TYPE_MASK) { | |
5f7082ed HX |
435 | case CRYPTO_ALG_TYPE_HASH_MASK: |
436 | return crypto_init_shash_ops_compat(tfm); | |
3b2f6df0 HX |
437 | } |
438 | ||
439 | return -EINVAL; | |
440 | } | |
441 | ||
442 | static unsigned int crypto_shash_ctxsize(struct crypto_alg *alg, u32 type, | |
443 | u32 mask) | |
444 | { | |
445 | switch (mask & CRYPTO_ALG_TYPE_MASK) { | |
5f7082ed | 446 | case CRYPTO_ALG_TYPE_HASH_MASK: |
113adefc | 447 | return sizeof(struct shash_desc *); |
3b2f6df0 HX |
448 | } |
449 | ||
450 | return 0; | |
451 | } | |
452 | ||
2ca33da1 | 453 | static int crypto_shash_init_tfm(struct crypto_tfm *tfm) |
7b5a080b | 454 | { |
113adefc HX |
455 | struct crypto_shash *hash = __crypto_shash_cast(tfm); |
456 | ||
457 | hash->descsize = crypto_shash_alg(hash)->descsize; | |
7b5a080b HX |
458 | return 0; |
459 | } | |
460 | ||
2ca33da1 | 461 | static unsigned int crypto_shash_extsize(struct crypto_alg *alg) |
7b5a080b HX |
462 | { |
463 | return alg->cra_ctxsize; | |
464 | } | |
465 | ||
466 | static void crypto_shash_show(struct seq_file *m, struct crypto_alg *alg) | |
467 | __attribute__ ((unused)); | |
468 | static void crypto_shash_show(struct seq_file *m, struct crypto_alg *alg) | |
469 | { | |
470 | struct shash_alg *salg = __crypto_shash_alg(alg); | |
471 | ||
472 | seq_printf(m, "type : shash\n"); | |
473 | seq_printf(m, "blocksize : %u\n", alg->cra_blocksize); | |
474 | seq_printf(m, "digestsize : %u\n", salg->digestsize); | |
7b5a080b HX |
475 | } |
476 | ||
477 | static const struct crypto_type crypto_shash_type = { | |
3b2f6df0 | 478 | .ctxsize = crypto_shash_ctxsize, |
7b5a080b | 479 | .extsize = crypto_shash_extsize, |
3b2f6df0 | 480 | .init = crypto_init_shash_ops, |
7b5a080b HX |
481 | .init_tfm = crypto_shash_init_tfm, |
482 | #ifdef CONFIG_PROC_FS | |
483 | .show = crypto_shash_show, | |
484 | #endif | |
485 | .maskclear = ~CRYPTO_ALG_TYPE_MASK, | |
486 | .maskset = CRYPTO_ALG_TYPE_MASK, | |
487 | .type = CRYPTO_ALG_TYPE_SHASH, | |
488 | .tfmsize = offsetof(struct crypto_shash, base), | |
489 | }; | |
490 | ||
491 | struct crypto_shash *crypto_alloc_shash(const char *alg_name, u32 type, | |
492 | u32 mask) | |
493 | { | |
3f683d61 | 494 | return crypto_alloc_tfm(alg_name, &crypto_shash_type, type, mask); |
7b5a080b HX |
495 | } |
496 | EXPORT_SYMBOL_GPL(crypto_alloc_shash); | |
497 | ||
619a6ebd | 498 | static int shash_prepare_alg(struct shash_alg *alg) |
7b5a080b HX |
499 | { |
500 | struct crypto_alg *base = &alg->base; | |
501 | ||
502 | if (alg->digestsize > PAGE_SIZE / 8 || | |
99d27e1c HX |
503 | alg->descsize > PAGE_SIZE / 8 || |
504 | alg->statesize > PAGE_SIZE / 8) | |
7b5a080b HX |
505 | return -EINVAL; |
506 | ||
507 | base->cra_type = &crypto_shash_type; | |
508 | base->cra_flags &= ~CRYPTO_ALG_TYPE_MASK; | |
509 | base->cra_flags |= CRYPTO_ALG_TYPE_SHASH; | |
99d27e1c | 510 | |
8267adab HX |
511 | if (!alg->finup) |
512 | alg->finup = shash_finup_unaligned; | |
513 | if (!alg->digest) | |
514 | alg->digest = shash_digest_unaligned; | |
99d27e1c HX |
515 | if (!alg->import) |
516 | alg->import = shash_no_import; | |
517 | if (!alg->export) | |
518 | alg->export = shash_no_export; | |
57cfe44b HX |
519 | if (!alg->setkey) |
520 | alg->setkey = shash_no_setkey; | |
99d27e1c | 521 | |
619a6ebd HX |
522 | return 0; |
523 | } | |
524 | ||
525 | int crypto_register_shash(struct shash_alg *alg) | |
526 | { | |
527 | struct crypto_alg *base = &alg->base; | |
528 | int err; | |
529 | ||
530 | err = shash_prepare_alg(alg); | |
531 | if (err) | |
532 | return err; | |
7b5a080b HX |
533 | |
534 | return crypto_register_alg(base); | |
535 | } | |
536 | EXPORT_SYMBOL_GPL(crypto_register_shash); | |
537 | ||
538 | int crypto_unregister_shash(struct shash_alg *alg) | |
539 | { | |
540 | return crypto_unregister_alg(&alg->base); | |
541 | } | |
542 | EXPORT_SYMBOL_GPL(crypto_unregister_shash); | |
543 | ||
619a6ebd HX |
544 | int shash_register_instance(struct crypto_template *tmpl, |
545 | struct shash_instance *inst) | |
546 | { | |
547 | int err; | |
548 | ||
549 | err = shash_prepare_alg(&inst->alg); | |
550 | if (err) | |
551 | return err; | |
552 | ||
553 | return crypto_register_instance(tmpl, shash_crypto_instance(inst)); | |
554 | } | |
555 | EXPORT_SYMBOL_GPL(shash_register_instance); | |
556 | ||
2e4fddd8 HX |
557 | void shash_free_instance(struct crypto_instance *inst) |
558 | { | |
559 | crypto_drop_spawn(crypto_instance_ctx(inst)); | |
560 | kfree(shash_instance(inst)); | |
561 | } | |
562 | EXPORT_SYMBOL_GPL(shash_free_instance); | |
563 | ||
94296999 HX |
564 | int crypto_init_shash_spawn(struct crypto_shash_spawn *spawn, |
565 | struct shash_alg *alg, | |
566 | struct crypto_instance *inst) | |
567 | { | |
568 | return crypto_init_spawn2(&spawn->base, &alg->base, inst, | |
569 | &crypto_shash_type); | |
570 | } | |
571 | EXPORT_SYMBOL_GPL(crypto_init_shash_spawn); | |
572 | ||
7d6f5640 HX |
573 | struct shash_alg *shash_attr_alg(struct rtattr *rta, u32 type, u32 mask) |
574 | { | |
575 | struct crypto_alg *alg; | |
576 | ||
577 | alg = crypto_attr_alg2(rta, &crypto_shash_type, type, mask); | |
578 | return IS_ERR(alg) ? ERR_CAST(alg) : | |
579 | container_of(alg, struct shash_alg, base); | |
580 | } | |
581 | EXPORT_SYMBOL_GPL(shash_attr_alg); | |
582 | ||
7b5a080b HX |
583 | MODULE_LICENSE("GPL"); |
584 | MODULE_DESCRIPTION("Synchronous cryptographic hash type"); |