Commit | Line | Data |
---|---|---|
2874c5fd | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
7b5a080b HX |
2 | /* |
3 | * Synchronous Cryptographic Hash operations. | |
4 | * | |
5 | * Copyright (c) 2008 Herbert Xu <herbert@gondor.apana.org.au> | |
7b5a080b HX |
6 | */ |
7 | ||
3b2f6df0 | 8 | #include <crypto/scatterwalk.h> |
7b5a080b HX |
9 | #include <crypto/internal/hash.h> |
10 | #include <linux/err.h> | |
11 | #include <linux/kernel.h> | |
12 | #include <linux/module.h> | |
13 | #include <linux/slab.h> | |
14 | #include <linux/seq_file.h> | |
f4d663ce SK |
15 | #include <linux/cryptouser.h> |
16 | #include <net/netlink.h> | |
d8c34b94 | 17 | #include <linux/compiler.h> |
7b5a080b | 18 | |
3b2f6df0 HX |
19 | #include "internal.h" |
20 | ||
3f683d61 HX |
21 | static const struct crypto_type crypto_shash_type; |
22 | ||
22ca9f4a AB |
23 | static int shash_no_setkey(struct crypto_shash *tfm, const u8 *key, |
24 | unsigned int keylen) | |
57cfe44b HX |
25 | { |
26 | return -ENOSYS; | |
27 | } | |
22ca9f4a AB |
28 | |
29 | /* | |
30 | * Check whether an shash algorithm has a setkey function. | |
31 | * | |
32 | * For CFI compatibility, this must not be an inline function. This is because | |
33 | * when CFI is enabled, modules won't get the same address for shash_no_setkey | |
34 | * (if it were exported, which inlining would require) as the core kernel will. | |
35 | */ | |
36 | bool crypto_shash_alg_has_setkey(struct shash_alg *alg) | |
37 | { | |
38 | return alg->setkey != shash_no_setkey; | |
39 | } | |
40 | EXPORT_SYMBOL_GPL(crypto_shash_alg_has_setkey); | |
57cfe44b | 41 | |
7b5a080b HX |
42 | static int shash_setkey_unaligned(struct crypto_shash *tfm, const u8 *key, |
43 | unsigned int keylen) | |
44 | { | |
45 | struct shash_alg *shash = crypto_shash_alg(tfm); | |
46 | unsigned long alignmask = crypto_shash_alignmask(tfm); | |
47 | unsigned long absize; | |
48 | u8 *buffer, *alignbuffer; | |
49 | int err; | |
50 | ||
18eb8ea6 | 51 | absize = keylen + (alignmask & ~(crypto_tfm_ctx_alignment() - 1)); |
9039f3ef | 52 | buffer = kmalloc(absize, GFP_ATOMIC); |
7b5a080b HX |
53 | if (!buffer) |
54 | return -ENOMEM; | |
55 | ||
56 | alignbuffer = (u8 *)ALIGN((unsigned long)buffer, alignmask + 1); | |
57 | memcpy(alignbuffer, key, keylen); | |
58 | err = shash->setkey(tfm, alignbuffer, keylen); | |
453431a5 | 59 | kfree_sensitive(buffer); |
7b5a080b HX |
60 | return err; |
61 | } | |
62 | ||
ba7d7433 EB |
63 | static void shash_set_needkey(struct crypto_shash *tfm, struct shash_alg *alg) |
64 | { | |
c2881789 | 65 | if (crypto_shash_alg_needs_key(alg)) |
ba7d7433 EB |
66 | crypto_shash_set_flags(tfm, CRYPTO_TFM_NEED_KEY); |
67 | } | |
68 | ||
7b5a080b HX |
69 | int crypto_shash_setkey(struct crypto_shash *tfm, const u8 *key, |
70 | unsigned int keylen) | |
71 | { | |
72 | struct shash_alg *shash = crypto_shash_alg(tfm); | |
73 | unsigned long alignmask = crypto_shash_alignmask(tfm); | |
9fa68f62 | 74 | int err; |
7b5a080b HX |
75 | |
76 | if ((unsigned long)key & alignmask) | |
9fa68f62 EB |
77 | err = shash_setkey_unaligned(tfm, key, keylen); |
78 | else | |
79 | err = shash->setkey(tfm, key, keylen); | |
80 | ||
ba7d7433 EB |
81 | if (unlikely(err)) { |
82 | shash_set_needkey(tfm, shash); | |
9fa68f62 | 83 | return err; |
ba7d7433 | 84 | } |
7b5a080b | 85 | |
9fa68f62 EB |
86 | crypto_shash_clear_flags(tfm, CRYPTO_TFM_NEED_KEY); |
87 | return 0; | |
7b5a080b HX |
88 | } |
89 | EXPORT_SYMBOL_GPL(crypto_shash_setkey); | |
90 | ||
7b5a080b HX |
91 | static int shash_update_unaligned(struct shash_desc *desc, const u8 *data, |
92 | unsigned int len) | |
93 | { | |
94 | struct crypto_shash *tfm = desc->tfm; | |
95 | struct shash_alg *shash = crypto_shash_alg(tfm); | |
96 | unsigned long alignmask = crypto_shash_alignmask(tfm); | |
97 | unsigned int unaligned_len = alignmask + 1 - | |
98 | ((unsigned long)data & alignmask); | |
f3569fd6 KC |
99 | /* |
100 | * We cannot count on __aligned() working for large values: | |
101 | * https://patchwork.kernel.org/patch/9507697/ | |
102 | */ | |
103 | u8 ubuf[MAX_ALGAPI_ALIGNMASK * 2]; | |
0e2d3a12 | 104 | u8 *buf = PTR_ALIGN(&ubuf[0], alignmask + 1); |
8c32c516 | 105 | int err; |
7b5a080b | 106 | |
f3569fd6 KC |
107 | if (WARN_ON(buf + unaligned_len > ubuf + sizeof(ubuf))) |
108 | return -EINVAL; | |
109 | ||
f4f68993 YS |
110 | if (unaligned_len > len) |
111 | unaligned_len = len; | |
112 | ||
7b5a080b | 113 | memcpy(buf, data, unaligned_len); |
8c32c516 HX |
114 | err = shash->update(desc, buf, unaligned_len); |
115 | memset(buf, 0, unaligned_len); | |
7b5a080b | 116 | |
8c32c516 | 117 | return err ?: |
7b5a080b HX |
118 | shash->update(desc, data + unaligned_len, len - unaligned_len); |
119 | } | |
120 | ||
121 | int crypto_shash_update(struct shash_desc *desc, const u8 *data, | |
122 | unsigned int len) | |
123 | { | |
124 | struct crypto_shash *tfm = desc->tfm; | |
125 | struct shash_alg *shash = crypto_shash_alg(tfm); | |
126 | unsigned long alignmask = crypto_shash_alignmask(tfm); | |
127 | ||
128 | if ((unsigned long)data & alignmask) | |
129 | return shash_update_unaligned(desc, data, len); | |
130 | ||
131 | return shash->update(desc, data, len); | |
132 | } | |
133 | EXPORT_SYMBOL_GPL(crypto_shash_update); | |
134 | ||
135 | static int shash_final_unaligned(struct shash_desc *desc, u8 *out) | |
136 | { | |
137 | struct crypto_shash *tfm = desc->tfm; | |
138 | unsigned long alignmask = crypto_shash_alignmask(tfm); | |
139 | struct shash_alg *shash = crypto_shash_alg(tfm); | |
140 | unsigned int ds = crypto_shash_digestsize(tfm); | |
f3569fd6 KC |
141 | /* |
142 | * We cannot count on __aligned() working for large values: | |
143 | * https://patchwork.kernel.org/patch/9507697/ | |
144 | */ | |
145 | u8 ubuf[MAX_ALGAPI_ALIGNMASK + HASH_MAX_DIGESTSIZE]; | |
0e2d3a12 | 146 | u8 *buf = PTR_ALIGN(&ubuf[0], alignmask + 1); |
7b5a080b HX |
147 | int err; |
148 | ||
f3569fd6 KC |
149 | if (WARN_ON(buf + ds > ubuf + sizeof(ubuf))) |
150 | return -EINVAL; | |
151 | ||
7b5a080b | 152 | err = shash->final(desc, buf); |
8c32c516 HX |
153 | if (err) |
154 | goto out; | |
155 | ||
7b5a080b | 156 | memcpy(out, buf, ds); |
8c32c516 HX |
157 | |
158 | out: | |
159 | memset(buf, 0, ds); | |
7b5a080b HX |
160 | return err; |
161 | } | |
162 | ||
163 | int crypto_shash_final(struct shash_desc *desc, 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 | ||
169 | if ((unsigned long)out & alignmask) | |
170 | return shash_final_unaligned(desc, out); | |
171 | ||
172 | return shash->final(desc, out); | |
173 | } | |
174 | EXPORT_SYMBOL_GPL(crypto_shash_final); | |
175 | ||
176 | static int shash_finup_unaligned(struct shash_desc *desc, const u8 *data, | |
177 | unsigned int len, u8 *out) | |
178 | { | |
179 | return crypto_shash_update(desc, data, len) ?: | |
180 | crypto_shash_final(desc, out); | |
181 | } | |
182 | ||
183 | int crypto_shash_finup(struct shash_desc *desc, const u8 *data, | |
184 | unsigned int len, u8 *out) | |
185 | { | |
186 | struct crypto_shash *tfm = desc->tfm; | |
187 | struct shash_alg *shash = crypto_shash_alg(tfm); | |
188 | unsigned long alignmask = crypto_shash_alignmask(tfm); | |
189 | ||
8267adab | 190 | if (((unsigned long)data | (unsigned long)out) & alignmask) |
7b5a080b HX |
191 | return shash_finup_unaligned(desc, data, len, out); |
192 | ||
193 | return shash->finup(desc, data, len, out); | |
194 | } | |
195 | EXPORT_SYMBOL_GPL(crypto_shash_finup); | |
196 | ||
197 | static int shash_digest_unaligned(struct shash_desc *desc, const u8 *data, | |
198 | unsigned int len, u8 *out) | |
199 | { | |
200 | return crypto_shash_init(desc) ?: | |
f88ad8de | 201 | crypto_shash_finup(desc, data, len, out); |
7b5a080b HX |
202 | } |
203 | ||
204 | int crypto_shash_digest(struct shash_desc *desc, const u8 *data, | |
205 | unsigned int len, u8 *out) | |
206 | { | |
207 | struct crypto_shash *tfm = desc->tfm; | |
208 | struct shash_alg *shash = crypto_shash_alg(tfm); | |
209 | unsigned long alignmask = crypto_shash_alignmask(tfm); | |
210 | ||
9fa68f62 EB |
211 | if (crypto_shash_get_flags(tfm) & CRYPTO_TFM_NEED_KEY) |
212 | return -ENOKEY; | |
213 | ||
8267adab | 214 | if (((unsigned long)data | (unsigned long)out) & alignmask) |
7b5a080b HX |
215 | return shash_digest_unaligned(desc, data, len, out); |
216 | ||
217 | return shash->digest(desc, data, len, out); | |
218 | } | |
219 | EXPORT_SYMBOL_GPL(crypto_shash_digest); | |
220 | ||
822a98b8 EB |
221 | int crypto_shash_tfm_digest(struct crypto_shash *tfm, const u8 *data, |
222 | unsigned int len, u8 *out) | |
223 | { | |
224 | SHASH_DESC_ON_STACK(desc, tfm); | |
225 | int err; | |
226 | ||
227 | desc->tfm = tfm; | |
228 | ||
229 | err = crypto_shash_digest(desc, data, len, out); | |
230 | ||
231 | shash_desc_zero(desc); | |
232 | ||
233 | return err; | |
234 | } | |
235 | EXPORT_SYMBOL_GPL(crypto_shash_tfm_digest); | |
236 | ||
f592682f | 237 | static int shash_default_export(struct shash_desc *desc, void *out) |
dec8b786 | 238 | { |
f592682f HX |
239 | memcpy(out, shash_desc_ctx(desc), crypto_shash_descsize(desc->tfm)); |
240 | return 0; | |
99d27e1c | 241 | } |
dec8b786 | 242 | |
f592682f | 243 | static int shash_default_import(struct shash_desc *desc, const void *in) |
99d27e1c | 244 | { |
f592682f HX |
245 | memcpy(shash_desc_ctx(desc), in, crypto_shash_descsize(desc->tfm)); |
246 | return 0; | |
dec8b786 | 247 | } |
dec8b786 | 248 | |
3b2f6df0 HX |
249 | static int shash_async_setkey(struct crypto_ahash *tfm, const u8 *key, |
250 | unsigned int keylen) | |
251 | { | |
252 | struct crypto_shash **ctx = crypto_ahash_ctx(tfm); | |
253 | ||
254 | return crypto_shash_setkey(*ctx, key, keylen); | |
255 | } | |
256 | ||
257 | static int shash_async_init(struct ahash_request *req) | |
258 | { | |
259 | struct crypto_shash **ctx = crypto_ahash_ctx(crypto_ahash_reqtfm(req)); | |
260 | struct shash_desc *desc = ahash_request_ctx(req); | |
261 | ||
262 | desc->tfm = *ctx; | |
3b2f6df0 HX |
263 | |
264 | return crypto_shash_init(desc); | |
265 | } | |
266 | ||
7eddf95e | 267 | int shash_ahash_update(struct ahash_request *req, struct shash_desc *desc) |
3b2f6df0 | 268 | { |
3b2f6df0 HX |
269 | struct crypto_hash_walk walk; |
270 | int nbytes; | |
271 | ||
272 | for (nbytes = crypto_hash_walk_first(req, &walk); nbytes > 0; | |
273 | nbytes = crypto_hash_walk_done(&walk, nbytes)) | |
274 | nbytes = crypto_shash_update(desc, walk.data, nbytes); | |
275 | ||
276 | return nbytes; | |
277 | } | |
7eddf95e HX |
278 | EXPORT_SYMBOL_GPL(shash_ahash_update); |
279 | ||
280 | static int shash_async_update(struct ahash_request *req) | |
281 | { | |
282 | return shash_ahash_update(req, ahash_request_ctx(req)); | |
283 | } | |
3b2f6df0 HX |
284 | |
285 | static int shash_async_final(struct ahash_request *req) | |
286 | { | |
287 | return crypto_shash_final(ahash_request_ctx(req), req->result); | |
288 | } | |
289 | ||
66f6ce5e HX |
290 | int shash_ahash_finup(struct ahash_request *req, struct shash_desc *desc) |
291 | { | |
292 | struct crypto_hash_walk walk; | |
293 | int nbytes; | |
294 | ||
cbc86b91 HX |
295 | nbytes = crypto_hash_walk_first(req, &walk); |
296 | if (!nbytes) | |
297 | return crypto_shash_final(desc, req->result); | |
298 | ||
299 | do { | |
66f6ce5e HX |
300 | nbytes = crypto_hash_walk_last(&walk) ? |
301 | crypto_shash_finup(desc, walk.data, nbytes, | |
302 | req->result) : | |
303 | crypto_shash_update(desc, walk.data, nbytes); | |
cbc86b91 HX |
304 | nbytes = crypto_hash_walk_done(&walk, nbytes); |
305 | } while (nbytes > 0); | |
66f6ce5e HX |
306 | |
307 | return nbytes; | |
308 | } | |
309 | EXPORT_SYMBOL_GPL(shash_ahash_finup); | |
310 | ||
311 | static int shash_async_finup(struct ahash_request *req) | |
312 | { | |
313 | struct crypto_shash **ctx = crypto_ahash_ctx(crypto_ahash_reqtfm(req)); | |
314 | struct shash_desc *desc = ahash_request_ctx(req); | |
315 | ||
316 | desc->tfm = *ctx; | |
66f6ce5e HX |
317 | |
318 | return shash_ahash_finup(req, desc); | |
319 | } | |
320 | ||
7eddf95e | 321 | int shash_ahash_digest(struct ahash_request *req, struct shash_desc *desc) |
3b2f6df0 | 322 | { |
3b2f6df0 | 323 | unsigned int nbytes = req->nbytes; |
b61907bb HX |
324 | struct scatterlist *sg; |
325 | unsigned int offset; | |
3b2f6df0 HX |
326 | int err; |
327 | ||
b61907bb HX |
328 | if (nbytes && |
329 | (sg = req->src, offset = sg->offset, | |
67cb60e4 | 330 | nbytes <= min(sg->length, ((unsigned int)(PAGE_SIZE)) - offset))) { |
3b2f6df0 HX |
331 | void *data; |
332 | ||
f0dfc0b0 | 333 | data = kmap_atomic(sg_page(sg)); |
3b2f6df0 HX |
334 | err = crypto_shash_digest(desc, data + offset, nbytes, |
335 | req->result); | |
f0dfc0b0 | 336 | kunmap_atomic(data); |
7eddf95e HX |
337 | } else |
338 | err = crypto_shash_init(desc) ?: | |
66f6ce5e | 339 | shash_ahash_finup(req, desc); |
3b2f6df0 | 340 | |
7eddf95e HX |
341 | return err; |
342 | } | |
343 | EXPORT_SYMBOL_GPL(shash_ahash_digest); | |
3b2f6df0 | 344 | |
7eddf95e HX |
345 | static int shash_async_digest(struct ahash_request *req) |
346 | { | |
347 | struct crypto_shash **ctx = crypto_ahash_ctx(crypto_ahash_reqtfm(req)); | |
348 | struct shash_desc *desc = ahash_request_ctx(req); | |
3b2f6df0 | 349 | |
7eddf95e | 350 | desc->tfm = *ctx; |
3b2f6df0 | 351 | |
7eddf95e | 352 | return shash_ahash_digest(req, desc); |
3b2f6df0 HX |
353 | } |
354 | ||
66f6ce5e HX |
355 | static int shash_async_export(struct ahash_request *req, void *out) |
356 | { | |
357 | return crypto_shash_export(ahash_request_ctx(req), out); | |
358 | } | |
359 | ||
360 | static int shash_async_import(struct ahash_request *req, const void *in) | |
361 | { | |
90246e79 HX |
362 | struct crypto_shash **ctx = crypto_ahash_ctx(crypto_ahash_reqtfm(req)); |
363 | struct shash_desc *desc = ahash_request_ctx(req); | |
364 | ||
365 | desc->tfm = *ctx; | |
90246e79 HX |
366 | |
367 | return crypto_shash_import(desc, in); | |
66f6ce5e HX |
368 | } |
369 | ||
3b2f6df0 HX |
370 | static void crypto_exit_shash_ops_async(struct crypto_tfm *tfm) |
371 | { | |
372 | struct crypto_shash **ctx = crypto_tfm_ctx(tfm); | |
373 | ||
374 | crypto_free_shash(*ctx); | |
375 | } | |
376 | ||
88056ec3 | 377 | int crypto_init_shash_ops_async(struct crypto_tfm *tfm) |
3b2f6df0 HX |
378 | { |
379 | struct crypto_alg *calg = tfm->__crt_alg; | |
66f6ce5e | 380 | struct shash_alg *alg = __crypto_shash_alg(calg); |
88056ec3 | 381 | struct crypto_ahash *crt = __crypto_ahash_cast(tfm); |
3b2f6df0 HX |
382 | struct crypto_shash **ctx = crypto_tfm_ctx(tfm); |
383 | struct crypto_shash *shash; | |
384 | ||
385 | if (!crypto_mod_get(calg)) | |
386 | return -EAGAIN; | |
387 | ||
3f683d61 | 388 | shash = crypto_create_tfm(calg, &crypto_shash_type); |
3b2f6df0 HX |
389 | if (IS_ERR(shash)) { |
390 | crypto_mod_put(calg); | |
391 | return PTR_ERR(shash); | |
392 | } | |
393 | ||
394 | *ctx = shash; | |
395 | tfm->exit = crypto_exit_shash_ops_async; | |
396 | ||
397 | crt->init = shash_async_init; | |
398 | crt->update = shash_async_update; | |
66f6ce5e HX |
399 | crt->final = shash_async_final; |
400 | crt->finup = shash_async_finup; | |
3b2f6df0 | 401 | crt->digest = shash_async_digest; |
ba7d7433 EB |
402 | if (crypto_shash_alg_has_setkey(alg)) |
403 | crt->setkey = shash_async_setkey; | |
00420a65 | 404 | |
9fa68f62 EB |
405 | crypto_ahash_set_flags(crt, crypto_shash_get_flags(shash) & |
406 | CRYPTO_TFM_NEED_KEY); | |
66f6ce5e | 407 | |
2b091e32 EB |
408 | crt->export = shash_async_export; |
409 | crt->import = shash_async_import; | |
3b2f6df0 | 410 | |
3b2f6df0 HX |
411 | crt->reqsize = sizeof(struct shash_desc) + crypto_shash_descsize(shash); |
412 | ||
413 | return 0; | |
414 | } | |
415 | ||
fbce6be5 HX |
416 | static void crypto_shash_exit_tfm(struct crypto_tfm *tfm) |
417 | { | |
418 | struct crypto_shash *hash = __crypto_shash_cast(tfm); | |
419 | struct shash_alg *alg = crypto_shash_alg(hash); | |
420 | ||
421 | alg->exit_tfm(hash); | |
422 | } | |
423 | ||
2ca33da1 | 424 | static int crypto_shash_init_tfm(struct crypto_tfm *tfm) |
7b5a080b | 425 | { |
113adefc | 426 | struct crypto_shash *hash = __crypto_shash_cast(tfm); |
9fa68f62 | 427 | struct shash_alg *alg = crypto_shash_alg(hash); |
fbce6be5 | 428 | int err; |
9fa68f62 EB |
429 | |
430 | hash->descsize = alg->descsize; | |
431 | ||
ba7d7433 | 432 | shash_set_needkey(hash, alg); |
113adefc | 433 | |
fbce6be5 HX |
434 | if (alg->exit_tfm) |
435 | tfm->exit = crypto_shash_exit_tfm; | |
436 | ||
437 | if (!alg->init_tfm) | |
438 | return 0; | |
439 | ||
440 | err = alg->init_tfm(hash); | |
441 | if (err) | |
442 | return err; | |
443 | ||
444 | /* ->init_tfm() may have increased the descsize. */ | |
445 | if (WARN_ON_ONCE(hash->descsize > HASH_MAX_DESCSIZE)) { | |
446 | if (alg->exit_tfm) | |
447 | alg->exit_tfm(hash); | |
448 | return -EINVAL; | |
449 | } | |
450 | ||
7b5a080b HX |
451 | return 0; |
452 | } | |
453 | ||
48fb3e57 EB |
454 | static void crypto_shash_free_instance(struct crypto_instance *inst) |
455 | { | |
456 | struct shash_instance *shash = shash_instance(inst); | |
457 | ||
48fb3e57 EB |
458 | shash->free(shash); |
459 | } | |
460 | ||
3acc8473 | 461 | #ifdef CONFIG_NET |
f4d663ce SK |
462 | static int crypto_shash_report(struct sk_buff *skb, struct crypto_alg *alg) |
463 | { | |
464 | struct crypto_report_hash rhash; | |
465 | struct shash_alg *salg = __crypto_shash_alg(alg); | |
466 | ||
37db69e0 EB |
467 | memset(&rhash, 0, sizeof(rhash)); |
468 | ||
469 | strscpy(rhash.type, "shash", sizeof(rhash.type)); | |
9a5467bf | 470 | |
f4d663ce SK |
471 | rhash.blocksize = alg->cra_blocksize; |
472 | rhash.digestsize = salg->digestsize; | |
473 | ||
37db69e0 | 474 | return nla_put(skb, CRYPTOCFGA_REPORT_HASH, sizeof(rhash), &rhash); |
f4d663ce | 475 | } |
3acc8473 HX |
476 | #else |
477 | static int crypto_shash_report(struct sk_buff *skb, struct crypto_alg *alg) | |
478 | { | |
479 | return -ENOSYS; | |
480 | } | |
481 | #endif | |
f4d663ce | 482 | |
7b5a080b | 483 | static void crypto_shash_show(struct seq_file *m, struct crypto_alg *alg) |
d8c34b94 | 484 | __maybe_unused; |
7b5a080b HX |
485 | static void crypto_shash_show(struct seq_file *m, struct crypto_alg *alg) |
486 | { | |
487 | struct shash_alg *salg = __crypto_shash_alg(alg); | |
488 | ||
489 | seq_printf(m, "type : shash\n"); | |
490 | seq_printf(m, "blocksize : %u\n", alg->cra_blocksize); | |
491 | seq_printf(m, "digestsize : %u\n", salg->digestsize); | |
7b5a080b HX |
492 | } |
493 | ||
494 | static const struct crypto_type crypto_shash_type = { | |
ac611680 | 495 | .extsize = crypto_alg_extsize, |
7b5a080b | 496 | .init_tfm = crypto_shash_init_tfm, |
48fb3e57 | 497 | .free = crypto_shash_free_instance, |
7b5a080b HX |
498 | #ifdef CONFIG_PROC_FS |
499 | .show = crypto_shash_show, | |
500 | #endif | |
f4d663ce | 501 | .report = crypto_shash_report, |
7b5a080b HX |
502 | .maskclear = ~CRYPTO_ALG_TYPE_MASK, |
503 | .maskset = CRYPTO_ALG_TYPE_MASK, | |
504 | .type = CRYPTO_ALG_TYPE_SHASH, | |
505 | .tfmsize = offsetof(struct crypto_shash, base), | |
506 | }; | |
507 | ||
fdfad1ff EB |
508 | int crypto_grab_shash(struct crypto_shash_spawn *spawn, |
509 | struct crypto_instance *inst, | |
510 | const char *name, u32 type, u32 mask) | |
511 | { | |
512 | spawn->base.frontend = &crypto_shash_type; | |
513 | return crypto_grab_spawn(&spawn->base, inst, name, type, mask); | |
514 | } | |
515 | EXPORT_SYMBOL_GPL(crypto_grab_shash); | |
516 | ||
7b5a080b HX |
517 | struct crypto_shash *crypto_alloc_shash(const char *alg_name, u32 type, |
518 | u32 mask) | |
519 | { | |
3f683d61 | 520 | return crypto_alloc_tfm(alg_name, &crypto_shash_type, type, mask); |
7b5a080b HX |
521 | } |
522 | EXPORT_SYMBOL_GPL(crypto_alloc_shash); | |
523 | ||
85cc4243 HR |
524 | int crypto_has_shash(const char *alg_name, u32 type, u32 mask) |
525 | { | |
526 | return crypto_type_has_alg(alg_name, &crypto_shash_type, type, mask); | |
527 | } | |
528 | EXPORT_SYMBOL_GPL(crypto_has_shash); | |
529 | ||
619a6ebd | 530 | static int shash_prepare_alg(struct shash_alg *alg) |
7b5a080b HX |
531 | { |
532 | struct crypto_alg *base = &alg->base; | |
533 | ||
b68a7ec1 KC |
534 | if (alg->digestsize > HASH_MAX_DIGESTSIZE || |
535 | alg->descsize > HASH_MAX_DESCSIZE || | |
536 | alg->statesize > HASH_MAX_STATESIZE) | |
7b5a080b HX |
537 | return -EINVAL; |
538 | ||
41a2e94f EB |
539 | if ((alg->export && !alg->import) || (alg->import && !alg->export)) |
540 | return -EINVAL; | |
541 | ||
7b5a080b HX |
542 | base->cra_type = &crypto_shash_type; |
543 | base->cra_flags &= ~CRYPTO_ALG_TYPE_MASK; | |
544 | base->cra_flags |= CRYPTO_ALG_TYPE_SHASH; | |
99d27e1c | 545 | |
8267adab HX |
546 | if (!alg->finup) |
547 | alg->finup = shash_finup_unaligned; | |
548 | if (!alg->digest) | |
549 | alg->digest = shash_digest_unaligned; | |
f592682f HX |
550 | if (!alg->export) { |
551 | alg->export = shash_default_export; | |
552 | alg->import = shash_default_import; | |
553 | alg->statesize = alg->descsize; | |
554 | } | |
57cfe44b HX |
555 | if (!alg->setkey) |
556 | alg->setkey = shash_no_setkey; | |
99d27e1c | 557 | |
619a6ebd HX |
558 | return 0; |
559 | } | |
560 | ||
561 | int crypto_register_shash(struct shash_alg *alg) | |
562 | { | |
563 | struct crypto_alg *base = &alg->base; | |
564 | int err; | |
565 | ||
566 | err = shash_prepare_alg(alg); | |
567 | if (err) | |
568 | return err; | |
7b5a080b HX |
569 | |
570 | return crypto_register_alg(base); | |
571 | } | |
572 | EXPORT_SYMBOL_GPL(crypto_register_shash); | |
573 | ||
c6d633a9 | 574 | void crypto_unregister_shash(struct shash_alg *alg) |
7b5a080b | 575 | { |
c6d633a9 | 576 | crypto_unregister_alg(&alg->base); |
7b5a080b HX |
577 | } |
578 | EXPORT_SYMBOL_GPL(crypto_unregister_shash); | |
579 | ||
50fc3e8d JK |
580 | int crypto_register_shashes(struct shash_alg *algs, int count) |
581 | { | |
582 | int i, ret; | |
583 | ||
584 | for (i = 0; i < count; i++) { | |
585 | ret = crypto_register_shash(&algs[i]); | |
586 | if (ret) | |
587 | goto err; | |
588 | } | |
589 | ||
590 | return 0; | |
591 | ||
592 | err: | |
593 | for (--i; i >= 0; --i) | |
594 | crypto_unregister_shash(&algs[i]); | |
595 | ||
596 | return ret; | |
597 | } | |
598 | EXPORT_SYMBOL_GPL(crypto_register_shashes); | |
599 | ||
c6d633a9 | 600 | void crypto_unregister_shashes(struct shash_alg *algs, int count) |
50fc3e8d | 601 | { |
c6d633a9 | 602 | int i; |
50fc3e8d | 603 | |
c6d633a9 EB |
604 | for (i = count - 1; i >= 0; --i) |
605 | crypto_unregister_shash(&algs[i]); | |
50fc3e8d JK |
606 | } |
607 | EXPORT_SYMBOL_GPL(crypto_unregister_shashes); | |
608 | ||
619a6ebd HX |
609 | int shash_register_instance(struct crypto_template *tmpl, |
610 | struct shash_instance *inst) | |
611 | { | |
612 | int err; | |
613 | ||
d4fdc2df EB |
614 | if (WARN_ON(!inst->free)) |
615 | return -EINVAL; | |
616 | ||
619a6ebd HX |
617 | err = shash_prepare_alg(&inst->alg); |
618 | if (err) | |
619 | return err; | |
620 | ||
621 | return crypto_register_instance(tmpl, shash_crypto_instance(inst)); | |
622 | } | |
623 | EXPORT_SYMBOL_GPL(shash_register_instance); | |
624 | ||
a39c66cc | 625 | void shash_free_singlespawn_instance(struct shash_instance *inst) |
2e4fddd8 | 626 | { |
a39c66cc EB |
627 | crypto_drop_spawn(shash_instance_ctx(inst)); |
628 | kfree(inst); | |
2e4fddd8 | 629 | } |
a39c66cc | 630 | EXPORT_SYMBOL_GPL(shash_free_singlespawn_instance); |
2e4fddd8 | 631 | |
7b5a080b HX |
632 | MODULE_LICENSE("GPL"); |
633 | MODULE_DESCRIPTION("Synchronous cryptographic hash type"); |