Commit | Line | Data |
---|---|---|
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> | |
f4d663ce SK |
20 | #include <linux/cryptouser.h> |
21 | #include <net/netlink.h> | |
d8c34b94 | 22 | #include <linux/compiler.h> |
7b5a080b | 23 | |
3b2f6df0 HX |
24 | #include "internal.h" |
25 | ||
3f683d61 HX |
26 | static const struct crypto_type crypto_shash_type; |
27 | ||
57cfe44b HX |
28 | static int shash_no_setkey(struct crypto_shash *tfm, const u8 *key, |
29 | unsigned int keylen) | |
30 | { | |
31 | return -ENOSYS; | |
32 | } | |
33 | ||
7b5a080b HX |
34 | static int shash_setkey_unaligned(struct crypto_shash *tfm, const u8 *key, |
35 | unsigned int keylen) | |
36 | { | |
37 | struct shash_alg *shash = crypto_shash_alg(tfm); | |
38 | unsigned long alignmask = crypto_shash_alignmask(tfm); | |
39 | unsigned long absize; | |
40 | u8 *buffer, *alignbuffer; | |
41 | int err; | |
42 | ||
18eb8ea6 | 43 | absize = keylen + (alignmask & ~(crypto_tfm_ctx_alignment() - 1)); |
9039f3ef | 44 | buffer = kmalloc(absize, GFP_ATOMIC); |
7b5a080b HX |
45 | if (!buffer) |
46 | return -ENOMEM; | |
47 | ||
48 | alignbuffer = (u8 *)ALIGN((unsigned long)buffer, alignmask + 1); | |
49 | memcpy(alignbuffer, key, keylen); | |
50 | err = shash->setkey(tfm, alignbuffer, keylen); | |
8c32c516 | 51 | kzfree(buffer); |
7b5a080b HX |
52 | return err; |
53 | } | |
54 | ||
55 | int crypto_shash_setkey(struct crypto_shash *tfm, const u8 *key, | |
56 | unsigned int keylen) | |
57 | { | |
58 | struct shash_alg *shash = crypto_shash_alg(tfm); | |
59 | unsigned long alignmask = crypto_shash_alignmask(tfm); | |
60 | ||
61 | if ((unsigned long)key & alignmask) | |
62 | return shash_setkey_unaligned(tfm, key, keylen); | |
63 | ||
64 | return shash->setkey(tfm, key, keylen); | |
65 | } | |
66 | EXPORT_SYMBOL_GPL(crypto_shash_setkey); | |
67 | ||
68 | static inline unsigned int shash_align_buffer_size(unsigned len, | |
69 | unsigned long mask) | |
70 | { | |
d8c34b94 | 71 | typedef u8 __aligned_largest u8_aligned; |
66d8ea57 | 72 | return len + (mask & ~(__alignof__(u8_aligned) - 1)); |
7b5a080b HX |
73 | } |
74 | ||
75 | static int shash_update_unaligned(struct shash_desc *desc, const u8 *data, | |
76 | unsigned int len) | |
77 | { | |
78 | struct crypto_shash *tfm = desc->tfm; | |
79 | struct shash_alg *shash = crypto_shash_alg(tfm); | |
80 | unsigned long alignmask = crypto_shash_alignmask(tfm); | |
81 | unsigned int unaligned_len = alignmask + 1 - | |
82 | ((unsigned long)data & alignmask); | |
0e2d3a12 | 83 | u8 ubuf[shash_align_buffer_size(unaligned_len, alignmask)] |
d8c34b94 | 84 | __aligned_largest; |
0e2d3a12 | 85 | u8 *buf = PTR_ALIGN(&ubuf[0], alignmask + 1); |
8c32c516 | 86 | int err; |
7b5a080b | 87 | |
f4f68993 YS |
88 | if (unaligned_len > len) |
89 | unaligned_len = len; | |
90 | ||
7b5a080b | 91 | memcpy(buf, data, unaligned_len); |
8c32c516 HX |
92 | err = shash->update(desc, buf, unaligned_len); |
93 | memset(buf, 0, unaligned_len); | |
7b5a080b | 94 | |
8c32c516 | 95 | return err ?: |
7b5a080b HX |
96 | shash->update(desc, data + unaligned_len, len - unaligned_len); |
97 | } | |
98 | ||
99 | int crypto_shash_update(struct shash_desc *desc, const u8 *data, | |
100 | unsigned int len) | |
101 | { | |
102 | struct crypto_shash *tfm = desc->tfm; | |
103 | struct shash_alg *shash = crypto_shash_alg(tfm); | |
104 | unsigned long alignmask = crypto_shash_alignmask(tfm); | |
105 | ||
106 | if ((unsigned long)data & alignmask) | |
107 | return shash_update_unaligned(desc, data, len); | |
108 | ||
109 | return shash->update(desc, data, len); | |
110 | } | |
111 | EXPORT_SYMBOL_GPL(crypto_shash_update); | |
112 | ||
113 | static int shash_final_unaligned(struct shash_desc *desc, u8 *out) | |
114 | { | |
115 | struct crypto_shash *tfm = desc->tfm; | |
116 | unsigned long alignmask = crypto_shash_alignmask(tfm); | |
117 | struct shash_alg *shash = crypto_shash_alg(tfm); | |
118 | unsigned int ds = crypto_shash_digestsize(tfm); | |
0e2d3a12 | 119 | u8 ubuf[shash_align_buffer_size(ds, alignmask)] |
d8c34b94 | 120 | __aligned_largest; |
0e2d3a12 | 121 | u8 *buf = PTR_ALIGN(&ubuf[0], alignmask + 1); |
7b5a080b HX |
122 | int err; |
123 | ||
124 | err = shash->final(desc, buf); | |
8c32c516 HX |
125 | if (err) |
126 | goto out; | |
127 | ||
7b5a080b | 128 | memcpy(out, buf, ds); |
8c32c516 HX |
129 | |
130 | out: | |
131 | memset(buf, 0, ds); | |
7b5a080b HX |
132 | return err; |
133 | } | |
134 | ||
135 | int crypto_shash_final(struct shash_desc *desc, u8 *out) | |
136 | { | |
137 | struct crypto_shash *tfm = desc->tfm; | |
138 | struct shash_alg *shash = crypto_shash_alg(tfm); | |
139 | unsigned long alignmask = crypto_shash_alignmask(tfm); | |
140 | ||
141 | if ((unsigned long)out & alignmask) | |
142 | return shash_final_unaligned(desc, out); | |
143 | ||
144 | return shash->final(desc, out); | |
145 | } | |
146 | EXPORT_SYMBOL_GPL(crypto_shash_final); | |
147 | ||
148 | static int shash_finup_unaligned(struct shash_desc *desc, const u8 *data, | |
149 | unsigned int len, u8 *out) | |
150 | { | |
151 | return crypto_shash_update(desc, data, len) ?: | |
152 | crypto_shash_final(desc, out); | |
153 | } | |
154 | ||
155 | int crypto_shash_finup(struct shash_desc *desc, const u8 *data, | |
156 | unsigned int len, u8 *out) | |
157 | { | |
158 | struct crypto_shash *tfm = desc->tfm; | |
159 | struct shash_alg *shash = crypto_shash_alg(tfm); | |
160 | unsigned long alignmask = crypto_shash_alignmask(tfm); | |
161 | ||
8267adab | 162 | if (((unsigned long)data | (unsigned long)out) & alignmask) |
7b5a080b HX |
163 | return shash_finup_unaligned(desc, data, len, out); |
164 | ||
165 | return shash->finup(desc, data, len, out); | |
166 | } | |
167 | EXPORT_SYMBOL_GPL(crypto_shash_finup); | |
168 | ||
169 | static int shash_digest_unaligned(struct shash_desc *desc, const u8 *data, | |
170 | unsigned int len, u8 *out) | |
171 | { | |
172 | return crypto_shash_init(desc) ?: | |
f88ad8de | 173 | crypto_shash_finup(desc, data, len, out); |
7b5a080b HX |
174 | } |
175 | ||
176 | int crypto_shash_digest(struct shash_desc *desc, const u8 *data, | |
177 | unsigned int len, u8 *out) | |
178 | { | |
179 | struct crypto_shash *tfm = desc->tfm; | |
180 | struct shash_alg *shash = crypto_shash_alg(tfm); | |
181 | unsigned long alignmask = crypto_shash_alignmask(tfm); | |
182 | ||
8267adab | 183 | if (((unsigned long)data | (unsigned long)out) & alignmask) |
7b5a080b HX |
184 | return shash_digest_unaligned(desc, data, len, out); |
185 | ||
186 | return shash->digest(desc, data, len, out); | |
187 | } | |
188 | EXPORT_SYMBOL_GPL(crypto_shash_digest); | |
189 | ||
f592682f | 190 | static int shash_default_export(struct shash_desc *desc, void *out) |
dec8b786 | 191 | { |
f592682f HX |
192 | memcpy(out, shash_desc_ctx(desc), crypto_shash_descsize(desc->tfm)); |
193 | return 0; | |
99d27e1c | 194 | } |
dec8b786 | 195 | |
f592682f | 196 | static int shash_default_import(struct shash_desc *desc, const void *in) |
99d27e1c | 197 | { |
f592682f HX |
198 | memcpy(shash_desc_ctx(desc), in, crypto_shash_descsize(desc->tfm)); |
199 | return 0; | |
dec8b786 | 200 | } |
dec8b786 | 201 | |
3b2f6df0 HX |
202 | static int shash_async_setkey(struct crypto_ahash *tfm, const u8 *key, |
203 | unsigned int keylen) | |
204 | { | |
205 | struct crypto_shash **ctx = crypto_ahash_ctx(tfm); | |
206 | ||
207 | return crypto_shash_setkey(*ctx, key, keylen); | |
208 | } | |
209 | ||
210 | static int shash_async_init(struct ahash_request *req) | |
211 | { | |
212 | struct crypto_shash **ctx = crypto_ahash_ctx(crypto_ahash_reqtfm(req)); | |
213 | struct shash_desc *desc = ahash_request_ctx(req); | |
214 | ||
215 | desc->tfm = *ctx; | |
216 | desc->flags = req->base.flags; | |
217 | ||
218 | return crypto_shash_init(desc); | |
219 | } | |
220 | ||
7eddf95e | 221 | int shash_ahash_update(struct ahash_request *req, struct shash_desc *desc) |
3b2f6df0 | 222 | { |
3b2f6df0 HX |
223 | struct crypto_hash_walk walk; |
224 | int nbytes; | |
225 | ||
226 | for (nbytes = crypto_hash_walk_first(req, &walk); nbytes > 0; | |
227 | nbytes = crypto_hash_walk_done(&walk, nbytes)) | |
228 | nbytes = crypto_shash_update(desc, walk.data, nbytes); | |
229 | ||
230 | return nbytes; | |
231 | } | |
7eddf95e HX |
232 | EXPORT_SYMBOL_GPL(shash_ahash_update); |
233 | ||
234 | static int shash_async_update(struct ahash_request *req) | |
235 | { | |
236 | return shash_ahash_update(req, ahash_request_ctx(req)); | |
237 | } | |
3b2f6df0 HX |
238 | |
239 | static int shash_async_final(struct ahash_request *req) | |
240 | { | |
241 | return crypto_shash_final(ahash_request_ctx(req), req->result); | |
242 | } | |
243 | ||
66f6ce5e HX |
244 | int shash_ahash_finup(struct ahash_request *req, struct shash_desc *desc) |
245 | { | |
246 | struct crypto_hash_walk walk; | |
247 | int nbytes; | |
248 | ||
cbc86b91 HX |
249 | nbytes = crypto_hash_walk_first(req, &walk); |
250 | if (!nbytes) | |
251 | return crypto_shash_final(desc, req->result); | |
252 | ||
253 | do { | |
66f6ce5e HX |
254 | nbytes = crypto_hash_walk_last(&walk) ? |
255 | crypto_shash_finup(desc, walk.data, nbytes, | |
256 | req->result) : | |
257 | crypto_shash_update(desc, walk.data, nbytes); | |
cbc86b91 HX |
258 | nbytes = crypto_hash_walk_done(&walk, nbytes); |
259 | } while (nbytes > 0); | |
66f6ce5e HX |
260 | |
261 | return nbytes; | |
262 | } | |
263 | EXPORT_SYMBOL_GPL(shash_ahash_finup); | |
264 | ||
265 | static int shash_async_finup(struct ahash_request *req) | |
266 | { | |
267 | struct crypto_shash **ctx = crypto_ahash_ctx(crypto_ahash_reqtfm(req)); | |
268 | struct shash_desc *desc = ahash_request_ctx(req); | |
269 | ||
270 | desc->tfm = *ctx; | |
271 | desc->flags = req->base.flags; | |
272 | ||
273 | return shash_ahash_finup(req, desc); | |
274 | } | |
275 | ||
7eddf95e | 276 | int shash_ahash_digest(struct ahash_request *req, struct shash_desc *desc) |
3b2f6df0 | 277 | { |
3b2f6df0 | 278 | unsigned int nbytes = req->nbytes; |
b61907bb HX |
279 | struct scatterlist *sg; |
280 | unsigned int offset; | |
3b2f6df0 HX |
281 | int err; |
282 | ||
b61907bb HX |
283 | if (nbytes && |
284 | (sg = req->src, offset = sg->offset, | |
285 | nbytes < min(sg->length, ((unsigned int)(PAGE_SIZE)) - offset))) { | |
3b2f6df0 HX |
286 | void *data; |
287 | ||
f0dfc0b0 | 288 | data = kmap_atomic(sg_page(sg)); |
3b2f6df0 HX |
289 | err = crypto_shash_digest(desc, data + offset, nbytes, |
290 | req->result); | |
f0dfc0b0 | 291 | kunmap_atomic(data); |
3b2f6df0 | 292 | crypto_yield(desc->flags); |
7eddf95e HX |
293 | } else |
294 | err = crypto_shash_init(desc) ?: | |
66f6ce5e | 295 | shash_ahash_finup(req, desc); |
3b2f6df0 | 296 | |
7eddf95e HX |
297 | return err; |
298 | } | |
299 | EXPORT_SYMBOL_GPL(shash_ahash_digest); | |
3b2f6df0 | 300 | |
7eddf95e HX |
301 | static int shash_async_digest(struct ahash_request *req) |
302 | { | |
303 | struct crypto_shash **ctx = crypto_ahash_ctx(crypto_ahash_reqtfm(req)); | |
304 | struct shash_desc *desc = ahash_request_ctx(req); | |
3b2f6df0 | 305 | |
7eddf95e HX |
306 | desc->tfm = *ctx; |
307 | desc->flags = req->base.flags; | |
3b2f6df0 | 308 | |
7eddf95e | 309 | return shash_ahash_digest(req, desc); |
3b2f6df0 HX |
310 | } |
311 | ||
66f6ce5e HX |
312 | static int shash_async_export(struct ahash_request *req, void *out) |
313 | { | |
314 | return crypto_shash_export(ahash_request_ctx(req), out); | |
315 | } | |
316 | ||
317 | static int shash_async_import(struct ahash_request *req, const void *in) | |
318 | { | |
90246e79 HX |
319 | struct crypto_shash **ctx = crypto_ahash_ctx(crypto_ahash_reqtfm(req)); |
320 | struct shash_desc *desc = ahash_request_ctx(req); | |
321 | ||
322 | desc->tfm = *ctx; | |
323 | desc->flags = req->base.flags; | |
324 | ||
325 | return crypto_shash_import(desc, in); | |
66f6ce5e HX |
326 | } |
327 | ||
3b2f6df0 HX |
328 | static void crypto_exit_shash_ops_async(struct crypto_tfm *tfm) |
329 | { | |
330 | struct crypto_shash **ctx = crypto_tfm_ctx(tfm); | |
331 | ||
332 | crypto_free_shash(*ctx); | |
333 | } | |
334 | ||
88056ec3 | 335 | int crypto_init_shash_ops_async(struct crypto_tfm *tfm) |
3b2f6df0 HX |
336 | { |
337 | struct crypto_alg *calg = tfm->__crt_alg; | |
66f6ce5e | 338 | struct shash_alg *alg = __crypto_shash_alg(calg); |
88056ec3 | 339 | struct crypto_ahash *crt = __crypto_ahash_cast(tfm); |
3b2f6df0 HX |
340 | struct crypto_shash **ctx = crypto_tfm_ctx(tfm); |
341 | struct crypto_shash *shash; | |
342 | ||
343 | if (!crypto_mod_get(calg)) | |
344 | return -EAGAIN; | |
345 | ||
3f683d61 | 346 | shash = crypto_create_tfm(calg, &crypto_shash_type); |
3b2f6df0 HX |
347 | if (IS_ERR(shash)) { |
348 | crypto_mod_put(calg); | |
349 | return PTR_ERR(shash); | |
350 | } | |
351 | ||
352 | *ctx = shash; | |
353 | tfm->exit = crypto_exit_shash_ops_async; | |
354 | ||
355 | crt->init = shash_async_init; | |
356 | crt->update = shash_async_update; | |
66f6ce5e HX |
357 | crt->final = shash_async_final; |
358 | crt->finup = shash_async_finup; | |
3b2f6df0 | 359 | crt->digest = shash_async_digest; |
00420a65 HX |
360 | crt->setkey = shash_async_setkey; |
361 | ||
362 | crt->has_setkey = alg->setkey != shash_no_setkey; | |
66f6ce5e | 363 | |
66f6ce5e HX |
364 | if (alg->export) |
365 | crt->export = shash_async_export; | |
0044f3ed | 366 | if (alg->import) |
66f6ce5e | 367 | crt->import = shash_async_import; |
3b2f6df0 | 368 | |
3b2f6df0 HX |
369 | crt->reqsize = sizeof(struct shash_desc) + crypto_shash_descsize(shash); |
370 | ||
371 | return 0; | |
372 | } | |
373 | ||
2ca33da1 | 374 | static int crypto_shash_init_tfm(struct crypto_tfm *tfm) |
7b5a080b | 375 | { |
113adefc HX |
376 | struct crypto_shash *hash = __crypto_shash_cast(tfm); |
377 | ||
378 | hash->descsize = crypto_shash_alg(hash)->descsize; | |
7b5a080b HX |
379 | return 0; |
380 | } | |
381 | ||
3acc8473 | 382 | #ifdef CONFIG_NET |
f4d663ce SK |
383 | static int crypto_shash_report(struct sk_buff *skb, struct crypto_alg *alg) |
384 | { | |
385 | struct crypto_report_hash rhash; | |
386 | struct shash_alg *salg = __crypto_shash_alg(alg); | |
387 | ||
9a5467bf MK |
388 | strncpy(rhash.type, "shash", sizeof(rhash.type)); |
389 | ||
f4d663ce SK |
390 | rhash.blocksize = alg->cra_blocksize; |
391 | rhash.digestsize = salg->digestsize; | |
392 | ||
6662df33 DM |
393 | if (nla_put(skb, CRYPTOCFGA_REPORT_HASH, |
394 | sizeof(struct crypto_report_hash), &rhash)) | |
395 | goto nla_put_failure; | |
f4d663ce SK |
396 | return 0; |
397 | ||
398 | nla_put_failure: | |
399 | return -EMSGSIZE; | |
400 | } | |
3acc8473 HX |
401 | #else |
402 | static int crypto_shash_report(struct sk_buff *skb, struct crypto_alg *alg) | |
403 | { | |
404 | return -ENOSYS; | |
405 | } | |
406 | #endif | |
f4d663ce | 407 | |
7b5a080b | 408 | static void crypto_shash_show(struct seq_file *m, struct crypto_alg *alg) |
d8c34b94 | 409 | __maybe_unused; |
7b5a080b HX |
410 | static void crypto_shash_show(struct seq_file *m, struct crypto_alg *alg) |
411 | { | |
412 | struct shash_alg *salg = __crypto_shash_alg(alg); | |
413 | ||
414 | seq_printf(m, "type : shash\n"); | |
415 | seq_printf(m, "blocksize : %u\n", alg->cra_blocksize); | |
416 | seq_printf(m, "digestsize : %u\n", salg->digestsize); | |
7b5a080b HX |
417 | } |
418 | ||
419 | static const struct crypto_type crypto_shash_type = { | |
ac611680 | 420 | .extsize = crypto_alg_extsize, |
7b5a080b HX |
421 | .init_tfm = crypto_shash_init_tfm, |
422 | #ifdef CONFIG_PROC_FS | |
423 | .show = crypto_shash_show, | |
424 | #endif | |
f4d663ce | 425 | .report = crypto_shash_report, |
7b5a080b HX |
426 | .maskclear = ~CRYPTO_ALG_TYPE_MASK, |
427 | .maskset = CRYPTO_ALG_TYPE_MASK, | |
428 | .type = CRYPTO_ALG_TYPE_SHASH, | |
429 | .tfmsize = offsetof(struct crypto_shash, base), | |
430 | }; | |
431 | ||
432 | struct crypto_shash *crypto_alloc_shash(const char *alg_name, u32 type, | |
433 | u32 mask) | |
434 | { | |
3f683d61 | 435 | return crypto_alloc_tfm(alg_name, &crypto_shash_type, type, mask); |
7b5a080b HX |
436 | } |
437 | EXPORT_SYMBOL_GPL(crypto_alloc_shash); | |
438 | ||
619a6ebd | 439 | static int shash_prepare_alg(struct shash_alg *alg) |
7b5a080b HX |
440 | { |
441 | struct crypto_alg *base = &alg->base; | |
442 | ||
443 | if (alg->digestsize > PAGE_SIZE / 8 || | |
99d27e1c HX |
444 | alg->descsize > PAGE_SIZE / 8 || |
445 | alg->statesize > PAGE_SIZE / 8) | |
7b5a080b HX |
446 | return -EINVAL; |
447 | ||
448 | base->cra_type = &crypto_shash_type; | |
449 | base->cra_flags &= ~CRYPTO_ALG_TYPE_MASK; | |
450 | base->cra_flags |= CRYPTO_ALG_TYPE_SHASH; | |
99d27e1c | 451 | |
8267adab HX |
452 | if (!alg->finup) |
453 | alg->finup = shash_finup_unaligned; | |
454 | if (!alg->digest) | |
455 | alg->digest = shash_digest_unaligned; | |
f592682f HX |
456 | if (!alg->export) { |
457 | alg->export = shash_default_export; | |
458 | alg->import = shash_default_import; | |
459 | alg->statesize = alg->descsize; | |
460 | } | |
57cfe44b HX |
461 | if (!alg->setkey) |
462 | alg->setkey = shash_no_setkey; | |
99d27e1c | 463 | |
619a6ebd HX |
464 | return 0; |
465 | } | |
466 | ||
467 | int crypto_register_shash(struct shash_alg *alg) | |
468 | { | |
469 | struct crypto_alg *base = &alg->base; | |
470 | int err; | |
471 | ||
472 | err = shash_prepare_alg(alg); | |
473 | if (err) | |
474 | return err; | |
7b5a080b HX |
475 | |
476 | return crypto_register_alg(base); | |
477 | } | |
478 | EXPORT_SYMBOL_GPL(crypto_register_shash); | |
479 | ||
480 | int crypto_unregister_shash(struct shash_alg *alg) | |
481 | { | |
482 | return crypto_unregister_alg(&alg->base); | |
483 | } | |
484 | EXPORT_SYMBOL_GPL(crypto_unregister_shash); | |
485 | ||
50fc3e8d JK |
486 | int crypto_register_shashes(struct shash_alg *algs, int count) |
487 | { | |
488 | int i, ret; | |
489 | ||
490 | for (i = 0; i < count; i++) { | |
491 | ret = crypto_register_shash(&algs[i]); | |
492 | if (ret) | |
493 | goto err; | |
494 | } | |
495 | ||
496 | return 0; | |
497 | ||
498 | err: | |
499 | for (--i; i >= 0; --i) | |
500 | crypto_unregister_shash(&algs[i]); | |
501 | ||
502 | return ret; | |
503 | } | |
504 | EXPORT_SYMBOL_GPL(crypto_register_shashes); | |
505 | ||
506 | int crypto_unregister_shashes(struct shash_alg *algs, int count) | |
507 | { | |
508 | int i, ret; | |
509 | ||
510 | for (i = count - 1; i >= 0; --i) { | |
511 | ret = crypto_unregister_shash(&algs[i]); | |
512 | if (ret) | |
513 | pr_err("Failed to unregister %s %s: %d\n", | |
514 | algs[i].base.cra_driver_name, | |
515 | algs[i].base.cra_name, ret); | |
516 | } | |
517 | ||
518 | return 0; | |
519 | } | |
520 | EXPORT_SYMBOL_GPL(crypto_unregister_shashes); | |
521 | ||
619a6ebd HX |
522 | int shash_register_instance(struct crypto_template *tmpl, |
523 | struct shash_instance *inst) | |
524 | { | |
525 | int err; | |
526 | ||
527 | err = shash_prepare_alg(&inst->alg); | |
528 | if (err) | |
529 | return err; | |
530 | ||
531 | return crypto_register_instance(tmpl, shash_crypto_instance(inst)); | |
532 | } | |
533 | EXPORT_SYMBOL_GPL(shash_register_instance); | |
534 | ||
2e4fddd8 HX |
535 | void shash_free_instance(struct crypto_instance *inst) |
536 | { | |
537 | crypto_drop_spawn(crypto_instance_ctx(inst)); | |
538 | kfree(shash_instance(inst)); | |
539 | } | |
540 | EXPORT_SYMBOL_GPL(shash_free_instance); | |
541 | ||
94296999 HX |
542 | int crypto_init_shash_spawn(struct crypto_shash_spawn *spawn, |
543 | struct shash_alg *alg, | |
544 | struct crypto_instance *inst) | |
545 | { | |
546 | return crypto_init_spawn2(&spawn->base, &alg->base, inst, | |
547 | &crypto_shash_type); | |
548 | } | |
549 | EXPORT_SYMBOL_GPL(crypto_init_shash_spawn); | |
550 | ||
7d6f5640 HX |
551 | struct shash_alg *shash_attr_alg(struct rtattr *rta, u32 type, u32 mask) |
552 | { | |
553 | struct crypto_alg *alg; | |
554 | ||
555 | alg = crypto_attr_alg2(rta, &crypto_shash_type, type, mask); | |
556 | return IS_ERR(alg) ? ERR_CAST(alg) : | |
557 | container_of(alg, struct shash_alg, base); | |
558 | } | |
559 | EXPORT_SYMBOL_GPL(shash_attr_alg); | |
560 | ||
7b5a080b HX |
561 | MODULE_LICENSE("GPL"); |
562 | MODULE_DESCRIPTION("Synchronous cryptographic hash type"); |