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 | ||
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 | ||
ba7d7433 EB |
56 | static void shash_set_needkey(struct crypto_shash *tfm, struct shash_alg *alg) |
57 | { | |
58 | if (crypto_shash_alg_has_setkey(alg) && | |
59 | !(alg->base.cra_flags & CRYPTO_ALG_OPTIONAL_KEY)) | |
60 | crypto_shash_set_flags(tfm, CRYPTO_TFM_NEED_KEY); | |
61 | } | |
62 | ||
7b5a080b HX |
63 | int crypto_shash_setkey(struct crypto_shash *tfm, const u8 *key, |
64 | unsigned int keylen) | |
65 | { | |
66 | struct shash_alg *shash = crypto_shash_alg(tfm); | |
67 | unsigned long alignmask = crypto_shash_alignmask(tfm); | |
9fa68f62 | 68 | int err; |
7b5a080b HX |
69 | |
70 | if ((unsigned long)key & alignmask) | |
9fa68f62 EB |
71 | err = shash_setkey_unaligned(tfm, key, keylen); |
72 | else | |
73 | err = shash->setkey(tfm, key, keylen); | |
74 | ||
ba7d7433 EB |
75 | if (unlikely(err)) { |
76 | shash_set_needkey(tfm, shash); | |
9fa68f62 | 77 | return err; |
ba7d7433 | 78 | } |
7b5a080b | 79 | |
9fa68f62 EB |
80 | crypto_shash_clear_flags(tfm, CRYPTO_TFM_NEED_KEY); |
81 | return 0; | |
7b5a080b HX |
82 | } |
83 | EXPORT_SYMBOL_GPL(crypto_shash_setkey); | |
84 | ||
7b5a080b HX |
85 | static int shash_update_unaligned(struct shash_desc *desc, const u8 *data, |
86 | unsigned int len) | |
87 | { | |
88 | struct crypto_shash *tfm = desc->tfm; | |
89 | struct shash_alg *shash = crypto_shash_alg(tfm); | |
90 | unsigned long alignmask = crypto_shash_alignmask(tfm); | |
91 | unsigned int unaligned_len = alignmask + 1 - | |
92 | ((unsigned long)data & alignmask); | |
f3569fd6 KC |
93 | /* |
94 | * We cannot count on __aligned() working for large values: | |
95 | * https://patchwork.kernel.org/patch/9507697/ | |
96 | */ | |
97 | u8 ubuf[MAX_ALGAPI_ALIGNMASK * 2]; | |
0e2d3a12 | 98 | u8 *buf = PTR_ALIGN(&ubuf[0], alignmask + 1); |
8c32c516 | 99 | int err; |
7b5a080b | 100 | |
f3569fd6 KC |
101 | if (WARN_ON(buf + unaligned_len > ubuf + sizeof(ubuf))) |
102 | return -EINVAL; | |
103 | ||
f4f68993 YS |
104 | if (unaligned_len > len) |
105 | unaligned_len = len; | |
106 | ||
7b5a080b | 107 | memcpy(buf, data, unaligned_len); |
8c32c516 HX |
108 | err = shash->update(desc, buf, unaligned_len); |
109 | memset(buf, 0, unaligned_len); | |
7b5a080b | 110 | |
8c32c516 | 111 | return err ?: |
7b5a080b HX |
112 | shash->update(desc, data + unaligned_len, len - unaligned_len); |
113 | } | |
114 | ||
115 | int crypto_shash_update(struct shash_desc *desc, const u8 *data, | |
116 | unsigned int len) | |
117 | { | |
118 | struct crypto_shash *tfm = desc->tfm; | |
119 | struct shash_alg *shash = crypto_shash_alg(tfm); | |
120 | unsigned long alignmask = crypto_shash_alignmask(tfm); | |
121 | ||
122 | if ((unsigned long)data & alignmask) | |
123 | return shash_update_unaligned(desc, data, len); | |
124 | ||
125 | return shash->update(desc, data, len); | |
126 | } | |
127 | EXPORT_SYMBOL_GPL(crypto_shash_update); | |
128 | ||
129 | static int shash_final_unaligned(struct shash_desc *desc, u8 *out) | |
130 | { | |
131 | struct crypto_shash *tfm = desc->tfm; | |
132 | unsigned long alignmask = crypto_shash_alignmask(tfm); | |
133 | struct shash_alg *shash = crypto_shash_alg(tfm); | |
134 | unsigned int ds = crypto_shash_digestsize(tfm); | |
f3569fd6 KC |
135 | /* |
136 | * We cannot count on __aligned() working for large values: | |
137 | * https://patchwork.kernel.org/patch/9507697/ | |
138 | */ | |
139 | u8 ubuf[MAX_ALGAPI_ALIGNMASK + HASH_MAX_DIGESTSIZE]; | |
0e2d3a12 | 140 | u8 *buf = PTR_ALIGN(&ubuf[0], alignmask + 1); |
7b5a080b HX |
141 | int err; |
142 | ||
f3569fd6 KC |
143 | if (WARN_ON(buf + ds > ubuf + sizeof(ubuf))) |
144 | return -EINVAL; | |
145 | ||
7b5a080b | 146 | err = shash->final(desc, buf); |
8c32c516 HX |
147 | if (err) |
148 | goto out; | |
149 | ||
7b5a080b | 150 | memcpy(out, buf, ds); |
8c32c516 HX |
151 | |
152 | out: | |
153 | memset(buf, 0, ds); | |
7b5a080b HX |
154 | return err; |
155 | } | |
156 | ||
157 | int crypto_shash_final(struct shash_desc *desc, u8 *out) | |
158 | { | |
159 | struct crypto_shash *tfm = desc->tfm; | |
160 | struct shash_alg *shash = crypto_shash_alg(tfm); | |
161 | unsigned long alignmask = crypto_shash_alignmask(tfm); | |
162 | ||
163 | if ((unsigned long)out & alignmask) | |
164 | return shash_final_unaligned(desc, out); | |
165 | ||
166 | return shash->final(desc, out); | |
167 | } | |
168 | EXPORT_SYMBOL_GPL(crypto_shash_final); | |
169 | ||
170 | static int shash_finup_unaligned(struct shash_desc *desc, const u8 *data, | |
171 | unsigned int len, u8 *out) | |
172 | { | |
173 | return crypto_shash_update(desc, data, len) ?: | |
174 | crypto_shash_final(desc, out); | |
175 | } | |
176 | ||
177 | int crypto_shash_finup(struct shash_desc *desc, const u8 *data, | |
178 | unsigned int len, u8 *out) | |
179 | { | |
180 | struct crypto_shash *tfm = desc->tfm; | |
181 | struct shash_alg *shash = crypto_shash_alg(tfm); | |
182 | unsigned long alignmask = crypto_shash_alignmask(tfm); | |
183 | ||
8267adab | 184 | if (((unsigned long)data | (unsigned long)out) & alignmask) |
7b5a080b HX |
185 | return shash_finup_unaligned(desc, data, len, out); |
186 | ||
187 | return shash->finup(desc, data, len, out); | |
188 | } | |
189 | EXPORT_SYMBOL_GPL(crypto_shash_finup); | |
190 | ||
191 | static int shash_digest_unaligned(struct shash_desc *desc, const u8 *data, | |
192 | unsigned int len, u8 *out) | |
193 | { | |
194 | return crypto_shash_init(desc) ?: | |
f88ad8de | 195 | crypto_shash_finup(desc, data, len, out); |
7b5a080b HX |
196 | } |
197 | ||
198 | int crypto_shash_digest(struct shash_desc *desc, const u8 *data, | |
199 | unsigned int len, u8 *out) | |
200 | { | |
201 | struct crypto_shash *tfm = desc->tfm; | |
202 | struct shash_alg *shash = crypto_shash_alg(tfm); | |
203 | unsigned long alignmask = crypto_shash_alignmask(tfm); | |
204 | ||
9fa68f62 EB |
205 | if (crypto_shash_get_flags(tfm) & CRYPTO_TFM_NEED_KEY) |
206 | return -ENOKEY; | |
207 | ||
8267adab | 208 | if (((unsigned long)data | (unsigned long)out) & alignmask) |
7b5a080b HX |
209 | return shash_digest_unaligned(desc, data, len, out); |
210 | ||
211 | return shash->digest(desc, data, len, out); | |
212 | } | |
213 | EXPORT_SYMBOL_GPL(crypto_shash_digest); | |
214 | ||
f592682f | 215 | static int shash_default_export(struct shash_desc *desc, void *out) |
dec8b786 | 216 | { |
f592682f HX |
217 | memcpy(out, shash_desc_ctx(desc), crypto_shash_descsize(desc->tfm)); |
218 | return 0; | |
99d27e1c | 219 | } |
dec8b786 | 220 | |
f592682f | 221 | static int shash_default_import(struct shash_desc *desc, const void *in) |
99d27e1c | 222 | { |
f592682f HX |
223 | memcpy(shash_desc_ctx(desc), in, crypto_shash_descsize(desc->tfm)); |
224 | return 0; | |
dec8b786 | 225 | } |
dec8b786 | 226 | |
3b2f6df0 HX |
227 | static int shash_async_setkey(struct crypto_ahash *tfm, const u8 *key, |
228 | unsigned int keylen) | |
229 | { | |
230 | struct crypto_shash **ctx = crypto_ahash_ctx(tfm); | |
231 | ||
232 | return crypto_shash_setkey(*ctx, key, keylen); | |
233 | } | |
234 | ||
235 | static int shash_async_init(struct ahash_request *req) | |
236 | { | |
237 | struct crypto_shash **ctx = crypto_ahash_ctx(crypto_ahash_reqtfm(req)); | |
238 | struct shash_desc *desc = ahash_request_ctx(req); | |
239 | ||
240 | desc->tfm = *ctx; | |
241 | desc->flags = req->base.flags; | |
242 | ||
243 | return crypto_shash_init(desc); | |
244 | } | |
245 | ||
7eddf95e | 246 | int shash_ahash_update(struct ahash_request *req, struct shash_desc *desc) |
3b2f6df0 | 247 | { |
3b2f6df0 HX |
248 | struct crypto_hash_walk walk; |
249 | int nbytes; | |
250 | ||
251 | for (nbytes = crypto_hash_walk_first(req, &walk); nbytes > 0; | |
252 | nbytes = crypto_hash_walk_done(&walk, nbytes)) | |
253 | nbytes = crypto_shash_update(desc, walk.data, nbytes); | |
254 | ||
255 | return nbytes; | |
256 | } | |
7eddf95e HX |
257 | EXPORT_SYMBOL_GPL(shash_ahash_update); |
258 | ||
259 | static int shash_async_update(struct ahash_request *req) | |
260 | { | |
261 | return shash_ahash_update(req, ahash_request_ctx(req)); | |
262 | } | |
3b2f6df0 HX |
263 | |
264 | static int shash_async_final(struct ahash_request *req) | |
265 | { | |
266 | return crypto_shash_final(ahash_request_ctx(req), req->result); | |
267 | } | |
268 | ||
66f6ce5e HX |
269 | int shash_ahash_finup(struct ahash_request *req, struct shash_desc *desc) |
270 | { | |
271 | struct crypto_hash_walk walk; | |
272 | int nbytes; | |
273 | ||
cbc86b91 HX |
274 | nbytes = crypto_hash_walk_first(req, &walk); |
275 | if (!nbytes) | |
276 | return crypto_shash_final(desc, req->result); | |
277 | ||
278 | do { | |
66f6ce5e HX |
279 | nbytes = crypto_hash_walk_last(&walk) ? |
280 | crypto_shash_finup(desc, walk.data, nbytes, | |
281 | req->result) : | |
282 | crypto_shash_update(desc, walk.data, nbytes); | |
cbc86b91 HX |
283 | nbytes = crypto_hash_walk_done(&walk, nbytes); |
284 | } while (nbytes > 0); | |
66f6ce5e HX |
285 | |
286 | return nbytes; | |
287 | } | |
288 | EXPORT_SYMBOL_GPL(shash_ahash_finup); | |
289 | ||
290 | static int shash_async_finup(struct ahash_request *req) | |
291 | { | |
292 | struct crypto_shash **ctx = crypto_ahash_ctx(crypto_ahash_reqtfm(req)); | |
293 | struct shash_desc *desc = ahash_request_ctx(req); | |
294 | ||
295 | desc->tfm = *ctx; | |
296 | desc->flags = req->base.flags; | |
297 | ||
298 | return shash_ahash_finup(req, desc); | |
299 | } | |
300 | ||
7eddf95e | 301 | int shash_ahash_digest(struct ahash_request *req, struct shash_desc *desc) |
3b2f6df0 | 302 | { |
3b2f6df0 | 303 | unsigned int nbytes = req->nbytes; |
b61907bb HX |
304 | struct scatterlist *sg; |
305 | unsigned int offset; | |
3b2f6df0 HX |
306 | int err; |
307 | ||
b61907bb HX |
308 | if (nbytes && |
309 | (sg = req->src, offset = sg->offset, | |
310 | nbytes < min(sg->length, ((unsigned int)(PAGE_SIZE)) - offset))) { | |
3b2f6df0 HX |
311 | void *data; |
312 | ||
f0dfc0b0 | 313 | data = kmap_atomic(sg_page(sg)); |
3b2f6df0 HX |
314 | err = crypto_shash_digest(desc, data + offset, nbytes, |
315 | req->result); | |
f0dfc0b0 | 316 | kunmap_atomic(data); |
3b2f6df0 | 317 | crypto_yield(desc->flags); |
7eddf95e HX |
318 | } else |
319 | err = crypto_shash_init(desc) ?: | |
66f6ce5e | 320 | shash_ahash_finup(req, desc); |
3b2f6df0 | 321 | |
7eddf95e HX |
322 | return err; |
323 | } | |
324 | EXPORT_SYMBOL_GPL(shash_ahash_digest); | |
3b2f6df0 | 325 | |
7eddf95e HX |
326 | static int shash_async_digest(struct ahash_request *req) |
327 | { | |
328 | struct crypto_shash **ctx = crypto_ahash_ctx(crypto_ahash_reqtfm(req)); | |
329 | struct shash_desc *desc = ahash_request_ctx(req); | |
3b2f6df0 | 330 | |
7eddf95e HX |
331 | desc->tfm = *ctx; |
332 | desc->flags = req->base.flags; | |
3b2f6df0 | 333 | |
7eddf95e | 334 | return shash_ahash_digest(req, desc); |
3b2f6df0 HX |
335 | } |
336 | ||
66f6ce5e HX |
337 | static int shash_async_export(struct ahash_request *req, void *out) |
338 | { | |
339 | return crypto_shash_export(ahash_request_ctx(req), out); | |
340 | } | |
341 | ||
342 | static int shash_async_import(struct ahash_request *req, const void *in) | |
343 | { | |
90246e79 HX |
344 | struct crypto_shash **ctx = crypto_ahash_ctx(crypto_ahash_reqtfm(req)); |
345 | struct shash_desc *desc = ahash_request_ctx(req); | |
346 | ||
347 | desc->tfm = *ctx; | |
348 | desc->flags = req->base.flags; | |
349 | ||
350 | return crypto_shash_import(desc, in); | |
66f6ce5e HX |
351 | } |
352 | ||
3b2f6df0 HX |
353 | static void crypto_exit_shash_ops_async(struct crypto_tfm *tfm) |
354 | { | |
355 | struct crypto_shash **ctx = crypto_tfm_ctx(tfm); | |
356 | ||
357 | crypto_free_shash(*ctx); | |
358 | } | |
359 | ||
88056ec3 | 360 | int crypto_init_shash_ops_async(struct crypto_tfm *tfm) |
3b2f6df0 HX |
361 | { |
362 | struct crypto_alg *calg = tfm->__crt_alg; | |
66f6ce5e | 363 | struct shash_alg *alg = __crypto_shash_alg(calg); |
88056ec3 | 364 | struct crypto_ahash *crt = __crypto_ahash_cast(tfm); |
3b2f6df0 HX |
365 | struct crypto_shash **ctx = crypto_tfm_ctx(tfm); |
366 | struct crypto_shash *shash; | |
367 | ||
368 | if (!crypto_mod_get(calg)) | |
369 | return -EAGAIN; | |
370 | ||
3f683d61 | 371 | shash = crypto_create_tfm(calg, &crypto_shash_type); |
3b2f6df0 HX |
372 | if (IS_ERR(shash)) { |
373 | crypto_mod_put(calg); | |
374 | return PTR_ERR(shash); | |
375 | } | |
376 | ||
377 | *ctx = shash; | |
378 | tfm->exit = crypto_exit_shash_ops_async; | |
379 | ||
380 | crt->init = shash_async_init; | |
381 | crt->update = shash_async_update; | |
66f6ce5e HX |
382 | crt->final = shash_async_final; |
383 | crt->finup = shash_async_finup; | |
3b2f6df0 | 384 | crt->digest = shash_async_digest; |
ba7d7433 EB |
385 | if (crypto_shash_alg_has_setkey(alg)) |
386 | crt->setkey = shash_async_setkey; | |
00420a65 | 387 | |
9fa68f62 EB |
388 | crypto_ahash_set_flags(crt, crypto_shash_get_flags(shash) & |
389 | CRYPTO_TFM_NEED_KEY); | |
66f6ce5e | 390 | |
66f6ce5e HX |
391 | if (alg->export) |
392 | crt->export = shash_async_export; | |
0044f3ed | 393 | if (alg->import) |
66f6ce5e | 394 | crt->import = shash_async_import; |
3b2f6df0 | 395 | |
3b2f6df0 HX |
396 | crt->reqsize = sizeof(struct shash_desc) + crypto_shash_descsize(shash); |
397 | ||
398 | return 0; | |
399 | } | |
400 | ||
2ca33da1 | 401 | static int crypto_shash_init_tfm(struct crypto_tfm *tfm) |
7b5a080b | 402 | { |
113adefc | 403 | struct crypto_shash *hash = __crypto_shash_cast(tfm); |
9fa68f62 EB |
404 | struct shash_alg *alg = crypto_shash_alg(hash); |
405 | ||
406 | hash->descsize = alg->descsize; | |
407 | ||
ba7d7433 | 408 | shash_set_needkey(hash, alg); |
113adefc | 409 | |
7b5a080b HX |
410 | return 0; |
411 | } | |
412 | ||
3acc8473 | 413 | #ifdef CONFIG_NET |
f4d663ce SK |
414 | static int crypto_shash_report(struct sk_buff *skb, struct crypto_alg *alg) |
415 | { | |
416 | struct crypto_report_hash rhash; | |
417 | struct shash_alg *salg = __crypto_shash_alg(alg); | |
418 | ||
37db69e0 EB |
419 | memset(&rhash, 0, sizeof(rhash)); |
420 | ||
421 | strscpy(rhash.type, "shash", sizeof(rhash.type)); | |
9a5467bf | 422 | |
f4d663ce SK |
423 | rhash.blocksize = alg->cra_blocksize; |
424 | rhash.digestsize = salg->digestsize; | |
425 | ||
37db69e0 | 426 | return nla_put(skb, CRYPTOCFGA_REPORT_HASH, sizeof(rhash), &rhash); |
f4d663ce | 427 | } |
3acc8473 HX |
428 | #else |
429 | static int crypto_shash_report(struct sk_buff *skb, struct crypto_alg *alg) | |
430 | { | |
431 | return -ENOSYS; | |
432 | } | |
433 | #endif | |
f4d663ce | 434 | |
7b5a080b | 435 | static void crypto_shash_show(struct seq_file *m, struct crypto_alg *alg) |
d8c34b94 | 436 | __maybe_unused; |
7b5a080b HX |
437 | static void crypto_shash_show(struct seq_file *m, struct crypto_alg *alg) |
438 | { | |
439 | struct shash_alg *salg = __crypto_shash_alg(alg); | |
440 | ||
441 | seq_printf(m, "type : shash\n"); | |
442 | seq_printf(m, "blocksize : %u\n", alg->cra_blocksize); | |
443 | seq_printf(m, "digestsize : %u\n", salg->digestsize); | |
7b5a080b HX |
444 | } |
445 | ||
446 | static const struct crypto_type crypto_shash_type = { | |
ac611680 | 447 | .extsize = crypto_alg_extsize, |
7b5a080b HX |
448 | .init_tfm = crypto_shash_init_tfm, |
449 | #ifdef CONFIG_PROC_FS | |
450 | .show = crypto_shash_show, | |
451 | #endif | |
f4d663ce | 452 | .report = crypto_shash_report, |
7b5a080b HX |
453 | .maskclear = ~CRYPTO_ALG_TYPE_MASK, |
454 | .maskset = CRYPTO_ALG_TYPE_MASK, | |
455 | .type = CRYPTO_ALG_TYPE_SHASH, | |
456 | .tfmsize = offsetof(struct crypto_shash, base), | |
457 | }; | |
458 | ||
459 | struct crypto_shash *crypto_alloc_shash(const char *alg_name, u32 type, | |
460 | u32 mask) | |
461 | { | |
3f683d61 | 462 | return crypto_alloc_tfm(alg_name, &crypto_shash_type, type, mask); |
7b5a080b HX |
463 | } |
464 | EXPORT_SYMBOL_GPL(crypto_alloc_shash); | |
465 | ||
619a6ebd | 466 | static int shash_prepare_alg(struct shash_alg *alg) |
7b5a080b HX |
467 | { |
468 | struct crypto_alg *base = &alg->base; | |
469 | ||
b68a7ec1 KC |
470 | if (alg->digestsize > HASH_MAX_DIGESTSIZE || |
471 | alg->descsize > HASH_MAX_DESCSIZE || | |
472 | alg->statesize > HASH_MAX_STATESIZE) | |
7b5a080b HX |
473 | return -EINVAL; |
474 | ||
475 | base->cra_type = &crypto_shash_type; | |
476 | base->cra_flags &= ~CRYPTO_ALG_TYPE_MASK; | |
477 | base->cra_flags |= CRYPTO_ALG_TYPE_SHASH; | |
99d27e1c | 478 | |
8267adab HX |
479 | if (!alg->finup) |
480 | alg->finup = shash_finup_unaligned; | |
481 | if (!alg->digest) | |
482 | alg->digest = shash_digest_unaligned; | |
f592682f HX |
483 | if (!alg->export) { |
484 | alg->export = shash_default_export; | |
485 | alg->import = shash_default_import; | |
486 | alg->statesize = alg->descsize; | |
487 | } | |
57cfe44b HX |
488 | if (!alg->setkey) |
489 | alg->setkey = shash_no_setkey; | |
99d27e1c | 490 | |
619a6ebd HX |
491 | return 0; |
492 | } | |
493 | ||
494 | int crypto_register_shash(struct shash_alg *alg) | |
495 | { | |
496 | struct crypto_alg *base = &alg->base; | |
497 | int err; | |
498 | ||
499 | err = shash_prepare_alg(alg); | |
500 | if (err) | |
501 | return err; | |
7b5a080b HX |
502 | |
503 | return crypto_register_alg(base); | |
504 | } | |
505 | EXPORT_SYMBOL_GPL(crypto_register_shash); | |
506 | ||
507 | int crypto_unregister_shash(struct shash_alg *alg) | |
508 | { | |
509 | return crypto_unregister_alg(&alg->base); | |
510 | } | |
511 | EXPORT_SYMBOL_GPL(crypto_unregister_shash); | |
512 | ||
50fc3e8d JK |
513 | int crypto_register_shashes(struct shash_alg *algs, int count) |
514 | { | |
515 | int i, ret; | |
516 | ||
517 | for (i = 0; i < count; i++) { | |
518 | ret = crypto_register_shash(&algs[i]); | |
519 | if (ret) | |
520 | goto err; | |
521 | } | |
522 | ||
523 | return 0; | |
524 | ||
525 | err: | |
526 | for (--i; i >= 0; --i) | |
527 | crypto_unregister_shash(&algs[i]); | |
528 | ||
529 | return ret; | |
530 | } | |
531 | EXPORT_SYMBOL_GPL(crypto_register_shashes); | |
532 | ||
533 | int crypto_unregister_shashes(struct shash_alg *algs, int count) | |
534 | { | |
535 | int i, ret; | |
536 | ||
537 | for (i = count - 1; i >= 0; --i) { | |
538 | ret = crypto_unregister_shash(&algs[i]); | |
539 | if (ret) | |
540 | pr_err("Failed to unregister %s %s: %d\n", | |
541 | algs[i].base.cra_driver_name, | |
542 | algs[i].base.cra_name, ret); | |
543 | } | |
544 | ||
545 | return 0; | |
546 | } | |
547 | EXPORT_SYMBOL_GPL(crypto_unregister_shashes); | |
548 | ||
619a6ebd HX |
549 | int shash_register_instance(struct crypto_template *tmpl, |
550 | struct shash_instance *inst) | |
551 | { | |
552 | int err; | |
553 | ||
554 | err = shash_prepare_alg(&inst->alg); | |
555 | if (err) | |
556 | return err; | |
557 | ||
558 | return crypto_register_instance(tmpl, shash_crypto_instance(inst)); | |
559 | } | |
560 | EXPORT_SYMBOL_GPL(shash_register_instance); | |
561 | ||
2e4fddd8 HX |
562 | void shash_free_instance(struct crypto_instance *inst) |
563 | { | |
564 | crypto_drop_spawn(crypto_instance_ctx(inst)); | |
565 | kfree(shash_instance(inst)); | |
566 | } | |
567 | EXPORT_SYMBOL_GPL(shash_free_instance); | |
568 | ||
94296999 HX |
569 | int crypto_init_shash_spawn(struct crypto_shash_spawn *spawn, |
570 | struct shash_alg *alg, | |
571 | struct crypto_instance *inst) | |
572 | { | |
573 | return crypto_init_spawn2(&spawn->base, &alg->base, inst, | |
574 | &crypto_shash_type); | |
575 | } | |
576 | EXPORT_SYMBOL_GPL(crypto_init_shash_spawn); | |
577 | ||
7d6f5640 HX |
578 | struct shash_alg *shash_attr_alg(struct rtattr *rta, u32 type, u32 mask) |
579 | { | |
580 | struct crypto_alg *alg; | |
581 | ||
582 | alg = crypto_attr_alg2(rta, &crypto_shash_type, type, mask); | |
583 | return IS_ERR(alg) ? ERR_CAST(alg) : | |
584 | container_of(alg, struct shash_alg, base); | |
585 | } | |
586 | EXPORT_SYMBOL_GPL(shash_attr_alg); | |
587 | ||
7b5a080b HX |
588 | MODULE_LICENSE("GPL"); |
589 | MODULE_DESCRIPTION("Synchronous cryptographic hash type"); |