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> | |
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); | |
0e2d3a12 | 79 | u8 ubuf[shash_align_buffer_size(unaligned_len, alignmask)] |
7b5a080b | 80 | __attribute__ ((aligned)); |
0e2d3a12 | 81 | u8 *buf = PTR_ALIGN(&ubuf[0], alignmask + 1); |
8c32c516 | 82 | int err; |
7b5a080b | 83 | |
f4f68993 YS |
84 | if (unaligned_len > len) |
85 | unaligned_len = len; | |
86 | ||
7b5a080b | 87 | memcpy(buf, data, unaligned_len); |
8c32c516 HX |
88 | err = shash->update(desc, buf, unaligned_len); |
89 | memset(buf, 0, unaligned_len); | |
7b5a080b | 90 | |
8c32c516 | 91 | return err ?: |
7b5a080b HX |
92 | shash->update(desc, data + unaligned_len, len - unaligned_len); |
93 | } | |
94 | ||
95 | int crypto_shash_update(struct shash_desc *desc, const u8 *data, | |
96 | unsigned int len) | |
97 | { | |
98 | struct crypto_shash *tfm = desc->tfm; | |
99 | struct shash_alg *shash = crypto_shash_alg(tfm); | |
100 | unsigned long alignmask = crypto_shash_alignmask(tfm); | |
101 | ||
102 | if ((unsigned long)data & alignmask) | |
103 | return shash_update_unaligned(desc, data, len); | |
104 | ||
105 | return shash->update(desc, data, len); | |
106 | } | |
107 | EXPORT_SYMBOL_GPL(crypto_shash_update); | |
108 | ||
109 | static int shash_final_unaligned(struct shash_desc *desc, u8 *out) | |
110 | { | |
111 | struct crypto_shash *tfm = desc->tfm; | |
112 | unsigned long alignmask = crypto_shash_alignmask(tfm); | |
113 | struct shash_alg *shash = crypto_shash_alg(tfm); | |
114 | unsigned int ds = crypto_shash_digestsize(tfm); | |
0e2d3a12 | 115 | u8 ubuf[shash_align_buffer_size(ds, alignmask)] |
7b5a080b | 116 | __attribute__ ((aligned)); |
0e2d3a12 | 117 | u8 *buf = PTR_ALIGN(&ubuf[0], alignmask + 1); |
7b5a080b HX |
118 | int err; |
119 | ||
120 | err = shash->final(desc, buf); | |
8c32c516 HX |
121 | if (err) |
122 | goto out; | |
123 | ||
7b5a080b | 124 | memcpy(out, buf, ds); |
8c32c516 HX |
125 | |
126 | out: | |
127 | memset(buf, 0, ds); | |
7b5a080b HX |
128 | return err; |
129 | } | |
130 | ||
131 | int crypto_shash_final(struct shash_desc *desc, u8 *out) | |
132 | { | |
133 | struct crypto_shash *tfm = desc->tfm; | |
134 | struct shash_alg *shash = crypto_shash_alg(tfm); | |
135 | unsigned long alignmask = crypto_shash_alignmask(tfm); | |
136 | ||
137 | if ((unsigned long)out & alignmask) | |
138 | return shash_final_unaligned(desc, out); | |
139 | ||
140 | return shash->final(desc, out); | |
141 | } | |
142 | EXPORT_SYMBOL_GPL(crypto_shash_final); | |
143 | ||
144 | static int shash_finup_unaligned(struct shash_desc *desc, const u8 *data, | |
145 | unsigned int len, u8 *out) | |
146 | { | |
147 | return crypto_shash_update(desc, data, len) ?: | |
148 | crypto_shash_final(desc, out); | |
149 | } | |
150 | ||
151 | int crypto_shash_finup(struct shash_desc *desc, const u8 *data, | |
152 | unsigned int len, u8 *out) | |
153 | { | |
154 | struct crypto_shash *tfm = desc->tfm; | |
155 | struct shash_alg *shash = crypto_shash_alg(tfm); | |
156 | unsigned long alignmask = crypto_shash_alignmask(tfm); | |
157 | ||
8267adab | 158 | if (((unsigned long)data | (unsigned long)out) & alignmask) |
7b5a080b HX |
159 | return shash_finup_unaligned(desc, data, len, out); |
160 | ||
161 | return shash->finup(desc, data, len, out); | |
162 | } | |
163 | EXPORT_SYMBOL_GPL(crypto_shash_finup); | |
164 | ||
165 | static int shash_digest_unaligned(struct shash_desc *desc, const u8 *data, | |
166 | unsigned int len, u8 *out) | |
167 | { | |
168 | return crypto_shash_init(desc) ?: | |
f88ad8de | 169 | crypto_shash_finup(desc, data, len, out); |
7b5a080b HX |
170 | } |
171 | ||
172 | int crypto_shash_digest(struct shash_desc *desc, const u8 *data, | |
173 | unsigned int len, u8 *out) | |
174 | { | |
175 | struct crypto_shash *tfm = desc->tfm; | |
176 | struct shash_alg *shash = crypto_shash_alg(tfm); | |
177 | unsigned long alignmask = crypto_shash_alignmask(tfm); | |
178 | ||
8267adab | 179 | if (((unsigned long)data | (unsigned long)out) & alignmask) |
7b5a080b HX |
180 | return shash_digest_unaligned(desc, data, len, out); |
181 | ||
182 | return shash->digest(desc, data, len, out); | |
183 | } | |
184 | EXPORT_SYMBOL_GPL(crypto_shash_digest); | |
185 | ||
99d27e1c | 186 | static int shash_no_export(struct shash_desc *desc, void *out) |
dec8b786 | 187 | { |
99d27e1c HX |
188 | return -ENOSYS; |
189 | } | |
dec8b786 | 190 | |
99d27e1c HX |
191 | static int shash_no_import(struct shash_desc *desc, const void *in) |
192 | { | |
193 | return -ENOSYS; | |
dec8b786 | 194 | } |
dec8b786 | 195 | |
3b2f6df0 HX |
196 | static int shash_async_setkey(struct crypto_ahash *tfm, const u8 *key, |
197 | unsigned int keylen) | |
198 | { | |
199 | struct crypto_shash **ctx = crypto_ahash_ctx(tfm); | |
200 | ||
201 | return crypto_shash_setkey(*ctx, key, keylen); | |
202 | } | |
203 | ||
204 | static int shash_async_init(struct ahash_request *req) | |
205 | { | |
206 | struct crypto_shash **ctx = crypto_ahash_ctx(crypto_ahash_reqtfm(req)); | |
207 | struct shash_desc *desc = ahash_request_ctx(req); | |
208 | ||
209 | desc->tfm = *ctx; | |
210 | desc->flags = req->base.flags; | |
211 | ||
212 | return crypto_shash_init(desc); | |
213 | } | |
214 | ||
7eddf95e | 215 | int shash_ahash_update(struct ahash_request *req, struct shash_desc *desc) |
3b2f6df0 | 216 | { |
3b2f6df0 HX |
217 | struct crypto_hash_walk walk; |
218 | int nbytes; | |
219 | ||
220 | for (nbytes = crypto_hash_walk_first(req, &walk); nbytes > 0; | |
221 | nbytes = crypto_hash_walk_done(&walk, nbytes)) | |
222 | nbytes = crypto_shash_update(desc, walk.data, nbytes); | |
223 | ||
224 | return nbytes; | |
225 | } | |
7eddf95e HX |
226 | EXPORT_SYMBOL_GPL(shash_ahash_update); |
227 | ||
228 | static int shash_async_update(struct ahash_request *req) | |
229 | { | |
230 | return shash_ahash_update(req, ahash_request_ctx(req)); | |
231 | } | |
3b2f6df0 HX |
232 | |
233 | static int shash_async_final(struct ahash_request *req) | |
234 | { | |
235 | return crypto_shash_final(ahash_request_ctx(req), req->result); | |
236 | } | |
237 | ||
66f6ce5e HX |
238 | int shash_ahash_finup(struct ahash_request *req, struct shash_desc *desc) |
239 | { | |
240 | struct crypto_hash_walk walk; | |
241 | int nbytes; | |
242 | ||
cbc86b91 HX |
243 | nbytes = crypto_hash_walk_first(req, &walk); |
244 | if (!nbytes) | |
245 | return crypto_shash_final(desc, req->result); | |
246 | ||
247 | do { | |
66f6ce5e HX |
248 | nbytes = crypto_hash_walk_last(&walk) ? |
249 | crypto_shash_finup(desc, walk.data, nbytes, | |
250 | req->result) : | |
251 | crypto_shash_update(desc, walk.data, nbytes); | |
cbc86b91 HX |
252 | nbytes = crypto_hash_walk_done(&walk, nbytes); |
253 | } while (nbytes > 0); | |
66f6ce5e HX |
254 | |
255 | return nbytes; | |
256 | } | |
257 | EXPORT_SYMBOL_GPL(shash_ahash_finup); | |
258 | ||
259 | static int shash_async_finup(struct ahash_request *req) | |
260 | { | |
261 | struct crypto_shash **ctx = crypto_ahash_ctx(crypto_ahash_reqtfm(req)); | |
262 | struct shash_desc *desc = ahash_request_ctx(req); | |
263 | ||
264 | desc->tfm = *ctx; | |
265 | desc->flags = req->base.flags; | |
266 | ||
267 | return shash_ahash_finup(req, desc); | |
268 | } | |
269 | ||
7eddf95e | 270 | int shash_ahash_digest(struct ahash_request *req, struct shash_desc *desc) |
3b2f6df0 HX |
271 | { |
272 | struct scatterlist *sg = req->src; | |
273 | unsigned int offset = sg->offset; | |
274 | unsigned int nbytes = req->nbytes; | |
275 | int err; | |
276 | ||
277 | if (nbytes < min(sg->length, ((unsigned int)(PAGE_SIZE)) - offset)) { | |
3b2f6df0 HX |
278 | void *data; |
279 | ||
3b2f6df0 HX |
280 | data = crypto_kmap(sg_page(sg), 0); |
281 | err = crypto_shash_digest(desc, data + offset, nbytes, | |
282 | req->result); | |
283 | crypto_kunmap(data, 0); | |
284 | crypto_yield(desc->flags); | |
7eddf95e HX |
285 | } else |
286 | err = crypto_shash_init(desc) ?: | |
66f6ce5e | 287 | shash_ahash_finup(req, desc); |
3b2f6df0 | 288 | |
7eddf95e HX |
289 | return err; |
290 | } | |
291 | EXPORT_SYMBOL_GPL(shash_ahash_digest); | |
3b2f6df0 | 292 | |
7eddf95e HX |
293 | static int shash_async_digest(struct ahash_request *req) |
294 | { | |
295 | struct crypto_shash **ctx = crypto_ahash_ctx(crypto_ahash_reqtfm(req)); | |
296 | struct shash_desc *desc = ahash_request_ctx(req); | |
3b2f6df0 | 297 | |
7eddf95e HX |
298 | desc->tfm = *ctx; |
299 | desc->flags = req->base.flags; | |
3b2f6df0 | 300 | |
7eddf95e | 301 | return shash_ahash_digest(req, desc); |
3b2f6df0 HX |
302 | } |
303 | ||
66f6ce5e HX |
304 | static int shash_async_export(struct ahash_request *req, void *out) |
305 | { | |
306 | return crypto_shash_export(ahash_request_ctx(req), out); | |
307 | } | |
308 | ||
309 | static int shash_async_import(struct ahash_request *req, const void *in) | |
310 | { | |
311 | return crypto_shash_import(ahash_request_ctx(req), in); | |
312 | } | |
313 | ||
3b2f6df0 HX |
314 | static void crypto_exit_shash_ops_async(struct crypto_tfm *tfm) |
315 | { | |
316 | struct crypto_shash **ctx = crypto_tfm_ctx(tfm); | |
317 | ||
318 | crypto_free_shash(*ctx); | |
319 | } | |
320 | ||
88056ec3 | 321 | int crypto_init_shash_ops_async(struct crypto_tfm *tfm) |
3b2f6df0 HX |
322 | { |
323 | struct crypto_alg *calg = tfm->__crt_alg; | |
66f6ce5e | 324 | struct shash_alg *alg = __crypto_shash_alg(calg); |
88056ec3 | 325 | struct crypto_ahash *crt = __crypto_ahash_cast(tfm); |
3b2f6df0 HX |
326 | struct crypto_shash **ctx = crypto_tfm_ctx(tfm); |
327 | struct crypto_shash *shash; | |
328 | ||
329 | if (!crypto_mod_get(calg)) | |
330 | return -EAGAIN; | |
331 | ||
3f683d61 | 332 | shash = crypto_create_tfm(calg, &crypto_shash_type); |
3b2f6df0 HX |
333 | if (IS_ERR(shash)) { |
334 | crypto_mod_put(calg); | |
335 | return PTR_ERR(shash); | |
336 | } | |
337 | ||
338 | *ctx = shash; | |
339 | tfm->exit = crypto_exit_shash_ops_async; | |
340 | ||
341 | crt->init = shash_async_init; | |
342 | crt->update = shash_async_update; | |
66f6ce5e HX |
343 | crt->final = shash_async_final; |
344 | crt->finup = shash_async_finup; | |
3b2f6df0 | 345 | crt->digest = shash_async_digest; |
66f6ce5e HX |
346 | |
347 | if (alg->setkey) | |
348 | crt->setkey = shash_async_setkey; | |
349 | if (alg->export) | |
350 | crt->export = shash_async_export; | |
351 | if (alg->setkey) | |
352 | crt->import = shash_async_import; | |
3b2f6df0 | 353 | |
3b2f6df0 HX |
354 | crt->reqsize = sizeof(struct shash_desc) + crypto_shash_descsize(shash); |
355 | ||
356 | return 0; | |
357 | } | |
358 | ||
5f7082ed HX |
359 | static int shash_compat_setkey(struct crypto_hash *tfm, const u8 *key, |
360 | unsigned int keylen) | |
361 | { | |
113adefc HX |
362 | struct shash_desc **descp = crypto_hash_ctx(tfm); |
363 | struct shash_desc *desc = *descp; | |
5f7082ed HX |
364 | |
365 | return crypto_shash_setkey(desc->tfm, key, keylen); | |
366 | } | |
367 | ||
368 | static int shash_compat_init(struct hash_desc *hdesc) | |
369 | { | |
113adefc HX |
370 | struct shash_desc **descp = crypto_hash_ctx(hdesc->tfm); |
371 | struct shash_desc *desc = *descp; | |
5f7082ed HX |
372 | |
373 | desc->flags = hdesc->flags; | |
374 | ||
375 | return crypto_shash_init(desc); | |
376 | } | |
377 | ||
378 | static int shash_compat_update(struct hash_desc *hdesc, struct scatterlist *sg, | |
379 | unsigned int len) | |
380 | { | |
113adefc HX |
381 | struct shash_desc **descp = crypto_hash_ctx(hdesc->tfm); |
382 | struct shash_desc *desc = *descp; | |
5f7082ed HX |
383 | struct crypto_hash_walk walk; |
384 | int nbytes; | |
385 | ||
386 | for (nbytes = crypto_hash_walk_first_compat(hdesc, &walk, sg, len); | |
387 | nbytes > 0; nbytes = crypto_hash_walk_done(&walk, nbytes)) | |
388 | nbytes = crypto_shash_update(desc, walk.data, nbytes); | |
389 | ||
390 | return nbytes; | |
391 | } | |
392 | ||
393 | static int shash_compat_final(struct hash_desc *hdesc, u8 *out) | |
394 | { | |
113adefc HX |
395 | struct shash_desc **descp = crypto_hash_ctx(hdesc->tfm); |
396 | ||
397 | return crypto_shash_final(*descp, out); | |
5f7082ed HX |
398 | } |
399 | ||
400 | static int shash_compat_digest(struct hash_desc *hdesc, struct scatterlist *sg, | |
401 | unsigned int nbytes, u8 *out) | |
402 | { | |
403 | unsigned int offset = sg->offset; | |
404 | int err; | |
405 | ||
406 | if (nbytes < min(sg->length, ((unsigned int)(PAGE_SIZE)) - offset)) { | |
113adefc HX |
407 | struct shash_desc **descp = crypto_hash_ctx(hdesc->tfm); |
408 | struct shash_desc *desc = *descp; | |
5f7082ed HX |
409 | void *data; |
410 | ||
411 | desc->flags = hdesc->flags; | |
412 | ||
413 | data = crypto_kmap(sg_page(sg), 0); | |
414 | err = crypto_shash_digest(desc, data + offset, nbytes, out); | |
415 | crypto_kunmap(data, 0); | |
416 | crypto_yield(desc->flags); | |
417 | goto out; | |
418 | } | |
419 | ||
420 | err = shash_compat_init(hdesc); | |
421 | if (err) | |
422 | goto out; | |
423 | ||
424 | err = shash_compat_update(hdesc, sg, nbytes); | |
425 | if (err) | |
426 | goto out; | |
427 | ||
428 | err = shash_compat_final(hdesc, out); | |
429 | ||
430 | out: | |
431 | return err; | |
432 | } | |
433 | ||
434 | static void crypto_exit_shash_ops_compat(struct crypto_tfm *tfm) | |
435 | { | |
113adefc HX |
436 | struct shash_desc **descp = crypto_tfm_ctx(tfm); |
437 | struct shash_desc *desc = *descp; | |
5f7082ed HX |
438 | |
439 | crypto_free_shash(desc->tfm); | |
113adefc | 440 | kzfree(desc); |
5f7082ed HX |
441 | } |
442 | ||
443 | static int crypto_init_shash_ops_compat(struct crypto_tfm *tfm) | |
444 | { | |
445 | struct hash_tfm *crt = &tfm->crt_hash; | |
446 | struct crypto_alg *calg = tfm->__crt_alg; | |
447 | struct shash_alg *alg = __crypto_shash_alg(calg); | |
113adefc | 448 | struct shash_desc **descp = crypto_tfm_ctx(tfm); |
5f7082ed | 449 | struct crypto_shash *shash; |
113adefc | 450 | struct shash_desc *desc; |
5f7082ed | 451 | |
4abfd73e AKR |
452 | if (!crypto_mod_get(calg)) |
453 | return -EAGAIN; | |
454 | ||
3f683d61 | 455 | shash = crypto_create_tfm(calg, &crypto_shash_type); |
4abfd73e AKR |
456 | if (IS_ERR(shash)) { |
457 | crypto_mod_put(calg); | |
5f7082ed | 458 | return PTR_ERR(shash); |
4abfd73e | 459 | } |
5f7082ed | 460 | |
113adefc HX |
461 | desc = kmalloc(sizeof(*desc) + crypto_shash_descsize(shash), |
462 | GFP_KERNEL); | |
463 | if (!desc) { | |
464 | crypto_free_shash(shash); | |
465 | return -ENOMEM; | |
466 | } | |
467 | ||
468 | *descp = desc; | |
5f7082ed HX |
469 | desc->tfm = shash; |
470 | tfm->exit = crypto_exit_shash_ops_compat; | |
471 | ||
472 | crt->init = shash_compat_init; | |
473 | crt->update = shash_compat_update; | |
474 | crt->final = shash_compat_final; | |
475 | crt->digest = shash_compat_digest; | |
476 | crt->setkey = shash_compat_setkey; | |
477 | ||
478 | crt->digestsize = alg->digestsize; | |
479 | ||
480 | return 0; | |
481 | } | |
482 | ||
3b2f6df0 HX |
483 | static int crypto_init_shash_ops(struct crypto_tfm *tfm, u32 type, u32 mask) |
484 | { | |
485 | switch (mask & CRYPTO_ALG_TYPE_MASK) { | |
5f7082ed HX |
486 | case CRYPTO_ALG_TYPE_HASH_MASK: |
487 | return crypto_init_shash_ops_compat(tfm); | |
3b2f6df0 HX |
488 | } |
489 | ||
490 | return -EINVAL; | |
491 | } | |
492 | ||
493 | static unsigned int crypto_shash_ctxsize(struct crypto_alg *alg, u32 type, | |
494 | u32 mask) | |
495 | { | |
496 | switch (mask & CRYPTO_ALG_TYPE_MASK) { | |
5f7082ed | 497 | case CRYPTO_ALG_TYPE_HASH_MASK: |
113adefc | 498 | return sizeof(struct shash_desc *); |
3b2f6df0 HX |
499 | } |
500 | ||
501 | return 0; | |
502 | } | |
503 | ||
2ca33da1 | 504 | static int crypto_shash_init_tfm(struct crypto_tfm *tfm) |
7b5a080b | 505 | { |
113adefc HX |
506 | struct crypto_shash *hash = __crypto_shash_cast(tfm); |
507 | ||
508 | hash->descsize = crypto_shash_alg(hash)->descsize; | |
7b5a080b HX |
509 | return 0; |
510 | } | |
511 | ||
2ca33da1 | 512 | static unsigned int crypto_shash_extsize(struct crypto_alg *alg) |
7b5a080b HX |
513 | { |
514 | return alg->cra_ctxsize; | |
515 | } | |
516 | ||
517 | static void crypto_shash_show(struct seq_file *m, struct crypto_alg *alg) | |
518 | __attribute__ ((unused)); | |
519 | static void crypto_shash_show(struct seq_file *m, struct crypto_alg *alg) | |
520 | { | |
521 | struct shash_alg *salg = __crypto_shash_alg(alg); | |
522 | ||
523 | seq_printf(m, "type : shash\n"); | |
524 | seq_printf(m, "blocksize : %u\n", alg->cra_blocksize); | |
525 | seq_printf(m, "digestsize : %u\n", salg->digestsize); | |
7b5a080b HX |
526 | } |
527 | ||
528 | static const struct crypto_type crypto_shash_type = { | |
3b2f6df0 | 529 | .ctxsize = crypto_shash_ctxsize, |
7b5a080b | 530 | .extsize = crypto_shash_extsize, |
3b2f6df0 | 531 | .init = crypto_init_shash_ops, |
7b5a080b HX |
532 | .init_tfm = crypto_shash_init_tfm, |
533 | #ifdef CONFIG_PROC_FS | |
534 | .show = crypto_shash_show, | |
535 | #endif | |
536 | .maskclear = ~CRYPTO_ALG_TYPE_MASK, | |
537 | .maskset = CRYPTO_ALG_TYPE_MASK, | |
538 | .type = CRYPTO_ALG_TYPE_SHASH, | |
539 | .tfmsize = offsetof(struct crypto_shash, base), | |
540 | }; | |
541 | ||
542 | struct crypto_shash *crypto_alloc_shash(const char *alg_name, u32 type, | |
543 | u32 mask) | |
544 | { | |
3f683d61 | 545 | return crypto_alloc_tfm(alg_name, &crypto_shash_type, type, mask); |
7b5a080b HX |
546 | } |
547 | EXPORT_SYMBOL_GPL(crypto_alloc_shash); | |
548 | ||
619a6ebd | 549 | static int shash_prepare_alg(struct shash_alg *alg) |
7b5a080b HX |
550 | { |
551 | struct crypto_alg *base = &alg->base; | |
552 | ||
553 | if (alg->digestsize > PAGE_SIZE / 8 || | |
99d27e1c HX |
554 | alg->descsize > PAGE_SIZE / 8 || |
555 | alg->statesize > PAGE_SIZE / 8) | |
7b5a080b HX |
556 | return -EINVAL; |
557 | ||
558 | base->cra_type = &crypto_shash_type; | |
559 | base->cra_flags &= ~CRYPTO_ALG_TYPE_MASK; | |
560 | base->cra_flags |= CRYPTO_ALG_TYPE_SHASH; | |
99d27e1c | 561 | |
8267adab HX |
562 | if (!alg->finup) |
563 | alg->finup = shash_finup_unaligned; | |
564 | if (!alg->digest) | |
565 | alg->digest = shash_digest_unaligned; | |
99d27e1c HX |
566 | if (!alg->import) |
567 | alg->import = shash_no_import; | |
568 | if (!alg->export) | |
569 | alg->export = shash_no_export; | |
57cfe44b HX |
570 | if (!alg->setkey) |
571 | alg->setkey = shash_no_setkey; | |
99d27e1c | 572 | |
619a6ebd HX |
573 | return 0; |
574 | } | |
575 | ||
576 | int crypto_register_shash(struct shash_alg *alg) | |
577 | { | |
578 | struct crypto_alg *base = &alg->base; | |
579 | int err; | |
580 | ||
581 | err = shash_prepare_alg(alg); | |
582 | if (err) | |
583 | return err; | |
7b5a080b HX |
584 | |
585 | return crypto_register_alg(base); | |
586 | } | |
587 | EXPORT_SYMBOL_GPL(crypto_register_shash); | |
588 | ||
589 | int crypto_unregister_shash(struct shash_alg *alg) | |
590 | { | |
591 | return crypto_unregister_alg(&alg->base); | |
592 | } | |
593 | EXPORT_SYMBOL_GPL(crypto_unregister_shash); | |
594 | ||
619a6ebd HX |
595 | int shash_register_instance(struct crypto_template *tmpl, |
596 | struct shash_instance *inst) | |
597 | { | |
598 | int err; | |
599 | ||
600 | err = shash_prepare_alg(&inst->alg); | |
601 | if (err) | |
602 | return err; | |
603 | ||
604 | return crypto_register_instance(tmpl, shash_crypto_instance(inst)); | |
605 | } | |
606 | EXPORT_SYMBOL_GPL(shash_register_instance); | |
607 | ||
2e4fddd8 HX |
608 | void shash_free_instance(struct crypto_instance *inst) |
609 | { | |
610 | crypto_drop_spawn(crypto_instance_ctx(inst)); | |
611 | kfree(shash_instance(inst)); | |
612 | } | |
613 | EXPORT_SYMBOL_GPL(shash_free_instance); | |
614 | ||
94296999 HX |
615 | int crypto_init_shash_spawn(struct crypto_shash_spawn *spawn, |
616 | struct shash_alg *alg, | |
617 | struct crypto_instance *inst) | |
618 | { | |
619 | return crypto_init_spawn2(&spawn->base, &alg->base, inst, | |
620 | &crypto_shash_type); | |
621 | } | |
622 | EXPORT_SYMBOL_GPL(crypto_init_shash_spawn); | |
623 | ||
7d6f5640 HX |
624 | struct shash_alg *shash_attr_alg(struct rtattr *rta, u32 type, u32 mask) |
625 | { | |
626 | struct crypto_alg *alg; | |
627 | ||
628 | alg = crypto_attr_alg2(rta, &crypto_shash_type, type, mask); | |
629 | return IS_ERR(alg) ? ERR_CAST(alg) : | |
630 | container_of(alg, struct shash_alg, base); | |
631 | } | |
632 | EXPORT_SYMBOL_GPL(shash_attr_alg); | |
633 | ||
7b5a080b HX |
634 | MODULE_LICENSE("GPL"); |
635 | MODULE_DESCRIPTION("Synchronous cryptographic hash type"); |