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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> | |
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 | ||
af3ff804 EB |
28 | int shash_no_setkey(struct crypto_shash *tfm, const u8 *key, |
29 | unsigned int keylen) | |
57cfe44b HX |
30 | { |
31 | return -ENOSYS; | |
32 | } | |
af3ff804 | 33 | EXPORT_SYMBOL_GPL(shash_no_setkey); |
57cfe44b | 34 | |
7b5a080b HX |
35 | static int shash_setkey_unaligned(struct crypto_shash *tfm, const u8 *key, |
36 | unsigned int keylen) | |
37 | { | |
38 | struct shash_alg *shash = crypto_shash_alg(tfm); | |
39 | unsigned long alignmask = crypto_shash_alignmask(tfm); | |
40 | unsigned long absize; | |
41 | u8 *buffer, *alignbuffer; | |
42 | int err; | |
43 | ||
18eb8ea6 | 44 | absize = keylen + (alignmask & ~(crypto_tfm_ctx_alignment() - 1)); |
9039f3ef | 45 | buffer = kmalloc(absize, GFP_ATOMIC); |
7b5a080b HX |
46 | if (!buffer) |
47 | return -ENOMEM; | |
48 | ||
49 | alignbuffer = (u8 *)ALIGN((unsigned long)buffer, alignmask + 1); | |
50 | memcpy(alignbuffer, key, keylen); | |
51 | err = shash->setkey(tfm, alignbuffer, keylen); | |
8c32c516 | 52 | kzfree(buffer); |
7b5a080b HX |
53 | return err; |
54 | } | |
55 | ||
56 | int crypto_shash_setkey(struct crypto_shash *tfm, const u8 *key, | |
57 | unsigned int keylen) | |
58 | { | |
59 | struct shash_alg *shash = crypto_shash_alg(tfm); | |
60 | unsigned long alignmask = crypto_shash_alignmask(tfm); | |
9fa68f62 | 61 | int err; |
7b5a080b HX |
62 | |
63 | if ((unsigned long)key & alignmask) | |
9fa68f62 EB |
64 | err = shash_setkey_unaligned(tfm, key, keylen); |
65 | else | |
66 | err = shash->setkey(tfm, key, keylen); | |
67 | ||
68 | if (err) | |
69 | return err; | |
7b5a080b | 70 | |
9fa68f62 EB |
71 | crypto_shash_clear_flags(tfm, CRYPTO_TFM_NEED_KEY); |
72 | return 0; | |
7b5a080b HX |
73 | } |
74 | EXPORT_SYMBOL_GPL(crypto_shash_setkey); | |
75 | ||
76 | static inline unsigned int shash_align_buffer_size(unsigned len, | |
77 | unsigned long mask) | |
78 | { | |
d8c34b94 | 79 | typedef u8 __aligned_largest u8_aligned; |
66d8ea57 | 80 | return len + (mask & ~(__alignof__(u8_aligned) - 1)); |
7b5a080b HX |
81 | } |
82 | ||
83 | static int shash_update_unaligned(struct shash_desc *desc, const u8 *data, | |
84 | unsigned int len) | |
85 | { | |
86 | struct crypto_shash *tfm = desc->tfm; | |
87 | struct shash_alg *shash = crypto_shash_alg(tfm); | |
88 | unsigned long alignmask = crypto_shash_alignmask(tfm); | |
89 | unsigned int unaligned_len = alignmask + 1 - | |
90 | ((unsigned long)data & alignmask); | |
0e2d3a12 | 91 | u8 ubuf[shash_align_buffer_size(unaligned_len, alignmask)] |
d8c34b94 | 92 | __aligned_largest; |
0e2d3a12 | 93 | u8 *buf = PTR_ALIGN(&ubuf[0], alignmask + 1); |
8c32c516 | 94 | int err; |
7b5a080b | 95 | |
f4f68993 YS |
96 | if (unaligned_len > len) |
97 | unaligned_len = len; | |
98 | ||
7b5a080b | 99 | memcpy(buf, data, unaligned_len); |
8c32c516 HX |
100 | err = shash->update(desc, buf, unaligned_len); |
101 | memset(buf, 0, unaligned_len); | |
7b5a080b | 102 | |
8c32c516 | 103 | return err ?: |
7b5a080b HX |
104 | shash->update(desc, data + unaligned_len, len - unaligned_len); |
105 | } | |
106 | ||
107 | int crypto_shash_update(struct shash_desc *desc, const u8 *data, | |
108 | unsigned int len) | |
109 | { | |
110 | struct crypto_shash *tfm = desc->tfm; | |
111 | struct shash_alg *shash = crypto_shash_alg(tfm); | |
112 | unsigned long alignmask = crypto_shash_alignmask(tfm); | |
113 | ||
114 | if ((unsigned long)data & alignmask) | |
115 | return shash_update_unaligned(desc, data, len); | |
116 | ||
117 | return shash->update(desc, data, len); | |
118 | } | |
119 | EXPORT_SYMBOL_GPL(crypto_shash_update); | |
120 | ||
121 | static int shash_final_unaligned(struct shash_desc *desc, u8 *out) | |
122 | { | |
123 | struct crypto_shash *tfm = desc->tfm; | |
124 | unsigned long alignmask = crypto_shash_alignmask(tfm); | |
125 | struct shash_alg *shash = crypto_shash_alg(tfm); | |
126 | unsigned int ds = crypto_shash_digestsize(tfm); | |
0e2d3a12 | 127 | u8 ubuf[shash_align_buffer_size(ds, alignmask)] |
d8c34b94 | 128 | __aligned_largest; |
0e2d3a12 | 129 | u8 *buf = PTR_ALIGN(&ubuf[0], alignmask + 1); |
7b5a080b HX |
130 | int err; |
131 | ||
132 | err = shash->final(desc, buf); | |
8c32c516 HX |
133 | if (err) |
134 | goto out; | |
135 | ||
7b5a080b | 136 | memcpy(out, buf, ds); |
8c32c516 HX |
137 | |
138 | out: | |
139 | memset(buf, 0, ds); | |
7b5a080b HX |
140 | return err; |
141 | } | |
142 | ||
143 | int crypto_shash_final(struct shash_desc *desc, u8 *out) | |
144 | { | |
145 | struct crypto_shash *tfm = desc->tfm; | |
146 | struct shash_alg *shash = crypto_shash_alg(tfm); | |
147 | unsigned long alignmask = crypto_shash_alignmask(tfm); | |
148 | ||
149 | if ((unsigned long)out & alignmask) | |
150 | return shash_final_unaligned(desc, out); | |
151 | ||
152 | return shash->final(desc, out); | |
153 | } | |
154 | EXPORT_SYMBOL_GPL(crypto_shash_final); | |
155 | ||
156 | static int shash_finup_unaligned(struct shash_desc *desc, const u8 *data, | |
157 | unsigned int len, u8 *out) | |
158 | { | |
159 | return crypto_shash_update(desc, data, len) ?: | |
160 | crypto_shash_final(desc, out); | |
161 | } | |
162 | ||
163 | int crypto_shash_finup(struct shash_desc *desc, const u8 *data, | |
164 | unsigned int len, u8 *out) | |
165 | { | |
166 | struct crypto_shash *tfm = desc->tfm; | |
167 | struct shash_alg *shash = crypto_shash_alg(tfm); | |
168 | unsigned long alignmask = crypto_shash_alignmask(tfm); | |
169 | ||
8267adab | 170 | if (((unsigned long)data | (unsigned long)out) & alignmask) |
7b5a080b HX |
171 | return shash_finup_unaligned(desc, data, len, out); |
172 | ||
173 | return shash->finup(desc, data, len, out); | |
174 | } | |
175 | EXPORT_SYMBOL_GPL(crypto_shash_finup); | |
176 | ||
177 | static int shash_digest_unaligned(struct shash_desc *desc, const u8 *data, | |
178 | unsigned int len, u8 *out) | |
179 | { | |
180 | return crypto_shash_init(desc) ?: | |
f88ad8de | 181 | crypto_shash_finup(desc, data, len, out); |
7b5a080b HX |
182 | } |
183 | ||
184 | int crypto_shash_digest(struct shash_desc *desc, const u8 *data, | |
185 | unsigned int len, u8 *out) | |
186 | { | |
187 | struct crypto_shash *tfm = desc->tfm; | |
188 | struct shash_alg *shash = crypto_shash_alg(tfm); | |
189 | unsigned long alignmask = crypto_shash_alignmask(tfm); | |
190 | ||
9fa68f62 EB |
191 | if (crypto_shash_get_flags(tfm) & CRYPTO_TFM_NEED_KEY) |
192 | return -ENOKEY; | |
193 | ||
8267adab | 194 | if (((unsigned long)data | (unsigned long)out) & alignmask) |
7b5a080b HX |
195 | return shash_digest_unaligned(desc, data, len, out); |
196 | ||
197 | return shash->digest(desc, data, len, out); | |
198 | } | |
199 | EXPORT_SYMBOL_GPL(crypto_shash_digest); | |
200 | ||
f592682f | 201 | static int shash_default_export(struct shash_desc *desc, void *out) |
dec8b786 | 202 | { |
f592682f HX |
203 | memcpy(out, shash_desc_ctx(desc), crypto_shash_descsize(desc->tfm)); |
204 | return 0; | |
99d27e1c | 205 | } |
dec8b786 | 206 | |
f592682f | 207 | static int shash_default_import(struct shash_desc *desc, const void *in) |
99d27e1c | 208 | { |
f592682f HX |
209 | memcpy(shash_desc_ctx(desc), in, crypto_shash_descsize(desc->tfm)); |
210 | return 0; | |
dec8b786 | 211 | } |
dec8b786 | 212 | |
3b2f6df0 HX |
213 | static int shash_async_setkey(struct crypto_ahash *tfm, const u8 *key, |
214 | unsigned int keylen) | |
215 | { | |
216 | struct crypto_shash **ctx = crypto_ahash_ctx(tfm); | |
217 | ||
218 | return crypto_shash_setkey(*ctx, key, keylen); | |
219 | } | |
220 | ||
221 | static int shash_async_init(struct ahash_request *req) | |
222 | { | |
223 | struct crypto_shash **ctx = crypto_ahash_ctx(crypto_ahash_reqtfm(req)); | |
224 | struct shash_desc *desc = ahash_request_ctx(req); | |
225 | ||
226 | desc->tfm = *ctx; | |
227 | desc->flags = req->base.flags; | |
228 | ||
229 | return crypto_shash_init(desc); | |
230 | } | |
231 | ||
7eddf95e | 232 | int shash_ahash_update(struct ahash_request *req, struct shash_desc *desc) |
3b2f6df0 | 233 | { |
3b2f6df0 HX |
234 | struct crypto_hash_walk walk; |
235 | int nbytes; | |
236 | ||
237 | for (nbytes = crypto_hash_walk_first(req, &walk); nbytes > 0; | |
238 | nbytes = crypto_hash_walk_done(&walk, nbytes)) | |
239 | nbytes = crypto_shash_update(desc, walk.data, nbytes); | |
240 | ||
241 | return nbytes; | |
242 | } | |
7eddf95e HX |
243 | EXPORT_SYMBOL_GPL(shash_ahash_update); |
244 | ||
245 | static int shash_async_update(struct ahash_request *req) | |
246 | { | |
247 | return shash_ahash_update(req, ahash_request_ctx(req)); | |
248 | } | |
3b2f6df0 HX |
249 | |
250 | static int shash_async_final(struct ahash_request *req) | |
251 | { | |
252 | return crypto_shash_final(ahash_request_ctx(req), req->result); | |
253 | } | |
254 | ||
66f6ce5e HX |
255 | int shash_ahash_finup(struct ahash_request *req, struct shash_desc *desc) |
256 | { | |
257 | struct crypto_hash_walk walk; | |
258 | int nbytes; | |
259 | ||
cbc86b91 HX |
260 | nbytes = crypto_hash_walk_first(req, &walk); |
261 | if (!nbytes) | |
262 | return crypto_shash_final(desc, req->result); | |
263 | ||
264 | do { | |
66f6ce5e HX |
265 | nbytes = crypto_hash_walk_last(&walk) ? |
266 | crypto_shash_finup(desc, walk.data, nbytes, | |
267 | req->result) : | |
268 | crypto_shash_update(desc, walk.data, nbytes); | |
cbc86b91 HX |
269 | nbytes = crypto_hash_walk_done(&walk, nbytes); |
270 | } while (nbytes > 0); | |
66f6ce5e HX |
271 | |
272 | return nbytes; | |
273 | } | |
274 | EXPORT_SYMBOL_GPL(shash_ahash_finup); | |
275 | ||
276 | static int shash_async_finup(struct ahash_request *req) | |
277 | { | |
278 | struct crypto_shash **ctx = crypto_ahash_ctx(crypto_ahash_reqtfm(req)); | |
279 | struct shash_desc *desc = ahash_request_ctx(req); | |
280 | ||
281 | desc->tfm = *ctx; | |
282 | desc->flags = req->base.flags; | |
283 | ||
284 | return shash_ahash_finup(req, desc); | |
285 | } | |
286 | ||
7eddf95e | 287 | int shash_ahash_digest(struct ahash_request *req, struct shash_desc *desc) |
3b2f6df0 | 288 | { |
3b2f6df0 | 289 | unsigned int nbytes = req->nbytes; |
b61907bb HX |
290 | struct scatterlist *sg; |
291 | unsigned int offset; | |
3b2f6df0 HX |
292 | int err; |
293 | ||
b61907bb HX |
294 | if (nbytes && |
295 | (sg = req->src, offset = sg->offset, | |
296 | nbytes < min(sg->length, ((unsigned int)(PAGE_SIZE)) - offset))) { | |
3b2f6df0 HX |
297 | void *data; |
298 | ||
f0dfc0b0 | 299 | data = kmap_atomic(sg_page(sg)); |
3b2f6df0 HX |
300 | err = crypto_shash_digest(desc, data + offset, nbytes, |
301 | req->result); | |
f0dfc0b0 | 302 | kunmap_atomic(data); |
3b2f6df0 | 303 | crypto_yield(desc->flags); |
7eddf95e HX |
304 | } else |
305 | err = crypto_shash_init(desc) ?: | |
66f6ce5e | 306 | shash_ahash_finup(req, desc); |
3b2f6df0 | 307 | |
7eddf95e HX |
308 | return err; |
309 | } | |
310 | EXPORT_SYMBOL_GPL(shash_ahash_digest); | |
3b2f6df0 | 311 | |
7eddf95e HX |
312 | static int shash_async_digest(struct ahash_request *req) |
313 | { | |
314 | struct crypto_shash **ctx = crypto_ahash_ctx(crypto_ahash_reqtfm(req)); | |
315 | struct shash_desc *desc = ahash_request_ctx(req); | |
3b2f6df0 | 316 | |
7eddf95e HX |
317 | desc->tfm = *ctx; |
318 | desc->flags = req->base.flags; | |
3b2f6df0 | 319 | |
7eddf95e | 320 | return shash_ahash_digest(req, desc); |
3b2f6df0 HX |
321 | } |
322 | ||
66f6ce5e HX |
323 | static int shash_async_export(struct ahash_request *req, void *out) |
324 | { | |
325 | return crypto_shash_export(ahash_request_ctx(req), out); | |
326 | } | |
327 | ||
328 | static int shash_async_import(struct ahash_request *req, const void *in) | |
329 | { | |
90246e79 HX |
330 | struct crypto_shash **ctx = crypto_ahash_ctx(crypto_ahash_reqtfm(req)); |
331 | struct shash_desc *desc = ahash_request_ctx(req); | |
332 | ||
333 | desc->tfm = *ctx; | |
334 | desc->flags = req->base.flags; | |
335 | ||
336 | return crypto_shash_import(desc, in); | |
66f6ce5e HX |
337 | } |
338 | ||
3b2f6df0 HX |
339 | static void crypto_exit_shash_ops_async(struct crypto_tfm *tfm) |
340 | { | |
341 | struct crypto_shash **ctx = crypto_tfm_ctx(tfm); | |
342 | ||
343 | crypto_free_shash(*ctx); | |
344 | } | |
345 | ||
88056ec3 | 346 | int crypto_init_shash_ops_async(struct crypto_tfm *tfm) |
3b2f6df0 HX |
347 | { |
348 | struct crypto_alg *calg = tfm->__crt_alg; | |
66f6ce5e | 349 | struct shash_alg *alg = __crypto_shash_alg(calg); |
88056ec3 | 350 | struct crypto_ahash *crt = __crypto_ahash_cast(tfm); |
3b2f6df0 HX |
351 | struct crypto_shash **ctx = crypto_tfm_ctx(tfm); |
352 | struct crypto_shash *shash; | |
353 | ||
354 | if (!crypto_mod_get(calg)) | |
355 | return -EAGAIN; | |
356 | ||
3f683d61 | 357 | shash = crypto_create_tfm(calg, &crypto_shash_type); |
3b2f6df0 HX |
358 | if (IS_ERR(shash)) { |
359 | crypto_mod_put(calg); | |
360 | return PTR_ERR(shash); | |
361 | } | |
362 | ||
363 | *ctx = shash; | |
364 | tfm->exit = crypto_exit_shash_ops_async; | |
365 | ||
366 | crt->init = shash_async_init; | |
367 | crt->update = shash_async_update; | |
66f6ce5e HX |
368 | crt->final = shash_async_final; |
369 | crt->finup = shash_async_finup; | |
3b2f6df0 | 370 | crt->digest = shash_async_digest; |
00420a65 HX |
371 | crt->setkey = shash_async_setkey; |
372 | ||
9fa68f62 EB |
373 | crypto_ahash_set_flags(crt, crypto_shash_get_flags(shash) & |
374 | CRYPTO_TFM_NEED_KEY); | |
66f6ce5e | 375 | |
66f6ce5e HX |
376 | if (alg->export) |
377 | crt->export = shash_async_export; | |
0044f3ed | 378 | if (alg->import) |
66f6ce5e | 379 | crt->import = shash_async_import; |
3b2f6df0 | 380 | |
3b2f6df0 HX |
381 | crt->reqsize = sizeof(struct shash_desc) + crypto_shash_descsize(shash); |
382 | ||
383 | return 0; | |
384 | } | |
385 | ||
2ca33da1 | 386 | static int crypto_shash_init_tfm(struct crypto_tfm *tfm) |
7b5a080b | 387 | { |
113adefc | 388 | struct crypto_shash *hash = __crypto_shash_cast(tfm); |
9fa68f62 EB |
389 | struct shash_alg *alg = crypto_shash_alg(hash); |
390 | ||
391 | hash->descsize = alg->descsize; | |
392 | ||
393 | if (crypto_shash_alg_has_setkey(alg) && | |
394 | !(alg->base.cra_flags & CRYPTO_ALG_OPTIONAL_KEY)) | |
395 | crypto_shash_set_flags(hash, CRYPTO_TFM_NEED_KEY); | |
113adefc | 396 | |
7b5a080b HX |
397 | return 0; |
398 | } | |
399 | ||
3acc8473 | 400 | #ifdef CONFIG_NET |
f4d663ce SK |
401 | static int crypto_shash_report(struct sk_buff *skb, struct crypto_alg *alg) |
402 | { | |
403 | struct crypto_report_hash rhash; | |
404 | struct shash_alg *salg = __crypto_shash_alg(alg); | |
405 | ||
9a5467bf MK |
406 | strncpy(rhash.type, "shash", sizeof(rhash.type)); |
407 | ||
f4d663ce SK |
408 | rhash.blocksize = alg->cra_blocksize; |
409 | rhash.digestsize = salg->digestsize; | |
410 | ||
6662df33 DM |
411 | if (nla_put(skb, CRYPTOCFGA_REPORT_HASH, |
412 | sizeof(struct crypto_report_hash), &rhash)) | |
413 | goto nla_put_failure; | |
f4d663ce SK |
414 | return 0; |
415 | ||
416 | nla_put_failure: | |
417 | return -EMSGSIZE; | |
418 | } | |
3acc8473 HX |
419 | #else |
420 | static int crypto_shash_report(struct sk_buff *skb, struct crypto_alg *alg) | |
421 | { | |
422 | return -ENOSYS; | |
423 | } | |
424 | #endif | |
f4d663ce | 425 | |
7b5a080b | 426 | static void crypto_shash_show(struct seq_file *m, struct crypto_alg *alg) |
d8c34b94 | 427 | __maybe_unused; |
7b5a080b HX |
428 | static void crypto_shash_show(struct seq_file *m, struct crypto_alg *alg) |
429 | { | |
430 | struct shash_alg *salg = __crypto_shash_alg(alg); | |
431 | ||
432 | seq_printf(m, "type : shash\n"); | |
433 | seq_printf(m, "blocksize : %u\n", alg->cra_blocksize); | |
434 | seq_printf(m, "digestsize : %u\n", salg->digestsize); | |
7b5a080b HX |
435 | } |
436 | ||
437 | static const struct crypto_type crypto_shash_type = { | |
ac611680 | 438 | .extsize = crypto_alg_extsize, |
7b5a080b HX |
439 | .init_tfm = crypto_shash_init_tfm, |
440 | #ifdef CONFIG_PROC_FS | |
441 | .show = crypto_shash_show, | |
442 | #endif | |
f4d663ce | 443 | .report = crypto_shash_report, |
7b5a080b HX |
444 | .maskclear = ~CRYPTO_ALG_TYPE_MASK, |
445 | .maskset = CRYPTO_ALG_TYPE_MASK, | |
446 | .type = CRYPTO_ALG_TYPE_SHASH, | |
447 | .tfmsize = offsetof(struct crypto_shash, base), | |
448 | }; | |
449 | ||
450 | struct crypto_shash *crypto_alloc_shash(const char *alg_name, u32 type, | |
451 | u32 mask) | |
452 | { | |
3f683d61 | 453 | return crypto_alloc_tfm(alg_name, &crypto_shash_type, type, mask); |
7b5a080b HX |
454 | } |
455 | EXPORT_SYMBOL_GPL(crypto_alloc_shash); | |
456 | ||
619a6ebd | 457 | static int shash_prepare_alg(struct shash_alg *alg) |
7b5a080b HX |
458 | { |
459 | struct crypto_alg *base = &alg->base; | |
460 | ||
461 | if (alg->digestsize > PAGE_SIZE / 8 || | |
99d27e1c HX |
462 | alg->descsize > PAGE_SIZE / 8 || |
463 | alg->statesize > PAGE_SIZE / 8) | |
7b5a080b HX |
464 | return -EINVAL; |
465 | ||
466 | base->cra_type = &crypto_shash_type; | |
467 | base->cra_flags &= ~CRYPTO_ALG_TYPE_MASK; | |
468 | base->cra_flags |= CRYPTO_ALG_TYPE_SHASH; | |
99d27e1c | 469 | |
8267adab HX |
470 | if (!alg->finup) |
471 | alg->finup = shash_finup_unaligned; | |
472 | if (!alg->digest) | |
473 | alg->digest = shash_digest_unaligned; | |
f592682f HX |
474 | if (!alg->export) { |
475 | alg->export = shash_default_export; | |
476 | alg->import = shash_default_import; | |
477 | alg->statesize = alg->descsize; | |
478 | } | |
57cfe44b HX |
479 | if (!alg->setkey) |
480 | alg->setkey = shash_no_setkey; | |
99d27e1c | 481 | |
619a6ebd HX |
482 | return 0; |
483 | } | |
484 | ||
485 | int crypto_register_shash(struct shash_alg *alg) | |
486 | { | |
487 | struct crypto_alg *base = &alg->base; | |
488 | int err; | |
489 | ||
490 | err = shash_prepare_alg(alg); | |
491 | if (err) | |
492 | return err; | |
7b5a080b HX |
493 | |
494 | return crypto_register_alg(base); | |
495 | } | |
496 | EXPORT_SYMBOL_GPL(crypto_register_shash); | |
497 | ||
498 | int crypto_unregister_shash(struct shash_alg *alg) | |
499 | { | |
500 | return crypto_unregister_alg(&alg->base); | |
501 | } | |
502 | EXPORT_SYMBOL_GPL(crypto_unregister_shash); | |
503 | ||
50fc3e8d JK |
504 | int crypto_register_shashes(struct shash_alg *algs, int count) |
505 | { | |
506 | int i, ret; | |
507 | ||
508 | for (i = 0; i < count; i++) { | |
509 | ret = crypto_register_shash(&algs[i]); | |
510 | if (ret) | |
511 | goto err; | |
512 | } | |
513 | ||
514 | return 0; | |
515 | ||
516 | err: | |
517 | for (--i; i >= 0; --i) | |
518 | crypto_unregister_shash(&algs[i]); | |
519 | ||
520 | return ret; | |
521 | } | |
522 | EXPORT_SYMBOL_GPL(crypto_register_shashes); | |
523 | ||
524 | int crypto_unregister_shashes(struct shash_alg *algs, int count) | |
525 | { | |
526 | int i, ret; | |
527 | ||
528 | for (i = count - 1; i >= 0; --i) { | |
529 | ret = crypto_unregister_shash(&algs[i]); | |
530 | if (ret) | |
531 | pr_err("Failed to unregister %s %s: %d\n", | |
532 | algs[i].base.cra_driver_name, | |
533 | algs[i].base.cra_name, ret); | |
534 | } | |
535 | ||
536 | return 0; | |
537 | } | |
538 | EXPORT_SYMBOL_GPL(crypto_unregister_shashes); | |
539 | ||
619a6ebd HX |
540 | int shash_register_instance(struct crypto_template *tmpl, |
541 | struct shash_instance *inst) | |
542 | { | |
543 | int err; | |
544 | ||
545 | err = shash_prepare_alg(&inst->alg); | |
546 | if (err) | |
547 | return err; | |
548 | ||
549 | return crypto_register_instance(tmpl, shash_crypto_instance(inst)); | |
550 | } | |
551 | EXPORT_SYMBOL_GPL(shash_register_instance); | |
552 | ||
2e4fddd8 HX |
553 | void shash_free_instance(struct crypto_instance *inst) |
554 | { | |
555 | crypto_drop_spawn(crypto_instance_ctx(inst)); | |
556 | kfree(shash_instance(inst)); | |
557 | } | |
558 | EXPORT_SYMBOL_GPL(shash_free_instance); | |
559 | ||
94296999 HX |
560 | int crypto_init_shash_spawn(struct crypto_shash_spawn *spawn, |
561 | struct shash_alg *alg, | |
562 | struct crypto_instance *inst) | |
563 | { | |
564 | return crypto_init_spawn2(&spawn->base, &alg->base, inst, | |
565 | &crypto_shash_type); | |
566 | } | |
567 | EXPORT_SYMBOL_GPL(crypto_init_shash_spawn); | |
568 | ||
7d6f5640 HX |
569 | struct shash_alg *shash_attr_alg(struct rtattr *rta, u32 type, u32 mask) |
570 | { | |
571 | struct crypto_alg *alg; | |
572 | ||
573 | alg = crypto_attr_alg2(rta, &crypto_shash_type, type, mask); | |
574 | return IS_ERR(alg) ? ERR_CAST(alg) : | |
575 | container_of(alg, struct shash_alg, base); | |
576 | } | |
577 | EXPORT_SYMBOL_GPL(shash_attr_alg); | |
578 | ||
7b5a080b HX |
579 | MODULE_LICENSE("GPL"); |
580 | MODULE_DESCRIPTION("Synchronous cryptographic hash type"); |