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 | ||
243 | for (nbytes = crypto_hash_walk_first(req, &walk); nbytes > 0; | |
244 | nbytes = crypto_hash_walk_done(&walk, nbytes)) | |
245 | nbytes = crypto_hash_walk_last(&walk) ? | |
246 | crypto_shash_finup(desc, walk.data, nbytes, | |
247 | req->result) : | |
248 | crypto_shash_update(desc, walk.data, nbytes); | |
249 | ||
250 | return nbytes; | |
251 | } | |
252 | EXPORT_SYMBOL_GPL(shash_ahash_finup); | |
253 | ||
254 | static int shash_async_finup(struct ahash_request *req) | |
255 | { | |
256 | struct crypto_shash **ctx = crypto_ahash_ctx(crypto_ahash_reqtfm(req)); | |
257 | struct shash_desc *desc = ahash_request_ctx(req); | |
258 | ||
259 | desc->tfm = *ctx; | |
260 | desc->flags = req->base.flags; | |
261 | ||
262 | return shash_ahash_finup(req, desc); | |
263 | } | |
264 | ||
7eddf95e | 265 | int shash_ahash_digest(struct ahash_request *req, struct shash_desc *desc) |
3b2f6df0 HX |
266 | { |
267 | struct scatterlist *sg = req->src; | |
268 | unsigned int offset = sg->offset; | |
269 | unsigned int nbytes = req->nbytes; | |
270 | int err; | |
271 | ||
272 | if (nbytes < min(sg->length, ((unsigned int)(PAGE_SIZE)) - offset)) { | |
3b2f6df0 HX |
273 | void *data; |
274 | ||
3b2f6df0 HX |
275 | data = crypto_kmap(sg_page(sg), 0); |
276 | err = crypto_shash_digest(desc, data + offset, nbytes, | |
277 | req->result); | |
278 | crypto_kunmap(data, 0); | |
279 | crypto_yield(desc->flags); | |
7eddf95e HX |
280 | } else |
281 | err = crypto_shash_init(desc) ?: | |
66f6ce5e | 282 | shash_ahash_finup(req, desc); |
3b2f6df0 | 283 | |
7eddf95e HX |
284 | return err; |
285 | } | |
286 | EXPORT_SYMBOL_GPL(shash_ahash_digest); | |
3b2f6df0 | 287 | |
7eddf95e HX |
288 | static int shash_async_digest(struct ahash_request *req) |
289 | { | |
290 | struct crypto_shash **ctx = crypto_ahash_ctx(crypto_ahash_reqtfm(req)); | |
291 | struct shash_desc *desc = ahash_request_ctx(req); | |
3b2f6df0 | 292 | |
7eddf95e HX |
293 | desc->tfm = *ctx; |
294 | desc->flags = req->base.flags; | |
3b2f6df0 | 295 | |
7eddf95e | 296 | return shash_ahash_digest(req, desc); |
3b2f6df0 HX |
297 | } |
298 | ||
66f6ce5e HX |
299 | static int shash_async_export(struct ahash_request *req, void *out) |
300 | { | |
301 | return crypto_shash_export(ahash_request_ctx(req), out); | |
302 | } | |
303 | ||
304 | static int shash_async_import(struct ahash_request *req, const void *in) | |
305 | { | |
306 | return crypto_shash_import(ahash_request_ctx(req), in); | |
307 | } | |
308 | ||
3b2f6df0 HX |
309 | static void crypto_exit_shash_ops_async(struct crypto_tfm *tfm) |
310 | { | |
311 | struct crypto_shash **ctx = crypto_tfm_ctx(tfm); | |
312 | ||
313 | crypto_free_shash(*ctx); | |
314 | } | |
315 | ||
88056ec3 | 316 | int crypto_init_shash_ops_async(struct crypto_tfm *tfm) |
3b2f6df0 HX |
317 | { |
318 | struct crypto_alg *calg = tfm->__crt_alg; | |
66f6ce5e | 319 | struct shash_alg *alg = __crypto_shash_alg(calg); |
88056ec3 | 320 | struct crypto_ahash *crt = __crypto_ahash_cast(tfm); |
3b2f6df0 HX |
321 | struct crypto_shash **ctx = crypto_tfm_ctx(tfm); |
322 | struct crypto_shash *shash; | |
323 | ||
324 | if (!crypto_mod_get(calg)) | |
325 | return -EAGAIN; | |
326 | ||
3f683d61 | 327 | shash = crypto_create_tfm(calg, &crypto_shash_type); |
3b2f6df0 HX |
328 | if (IS_ERR(shash)) { |
329 | crypto_mod_put(calg); | |
330 | return PTR_ERR(shash); | |
331 | } | |
332 | ||
333 | *ctx = shash; | |
334 | tfm->exit = crypto_exit_shash_ops_async; | |
335 | ||
336 | crt->init = shash_async_init; | |
337 | crt->update = shash_async_update; | |
66f6ce5e HX |
338 | crt->final = shash_async_final; |
339 | crt->finup = shash_async_finup; | |
3b2f6df0 | 340 | crt->digest = shash_async_digest; |
66f6ce5e HX |
341 | |
342 | if (alg->setkey) | |
343 | crt->setkey = shash_async_setkey; | |
344 | if (alg->export) | |
345 | crt->export = shash_async_export; | |
346 | if (alg->setkey) | |
347 | crt->import = shash_async_import; | |
3b2f6df0 | 348 | |
3b2f6df0 HX |
349 | crt->reqsize = sizeof(struct shash_desc) + crypto_shash_descsize(shash); |
350 | ||
351 | return 0; | |
352 | } | |
353 | ||
5f7082ed HX |
354 | static int shash_compat_setkey(struct crypto_hash *tfm, const u8 *key, |
355 | unsigned int keylen) | |
356 | { | |
113adefc HX |
357 | struct shash_desc **descp = crypto_hash_ctx(tfm); |
358 | struct shash_desc *desc = *descp; | |
5f7082ed HX |
359 | |
360 | return crypto_shash_setkey(desc->tfm, key, keylen); | |
361 | } | |
362 | ||
363 | static int shash_compat_init(struct hash_desc *hdesc) | |
364 | { | |
113adefc HX |
365 | struct shash_desc **descp = crypto_hash_ctx(hdesc->tfm); |
366 | struct shash_desc *desc = *descp; | |
5f7082ed HX |
367 | |
368 | desc->flags = hdesc->flags; | |
369 | ||
370 | return crypto_shash_init(desc); | |
371 | } | |
372 | ||
373 | static int shash_compat_update(struct hash_desc *hdesc, struct scatterlist *sg, | |
374 | unsigned int len) | |
375 | { | |
113adefc HX |
376 | struct shash_desc **descp = crypto_hash_ctx(hdesc->tfm); |
377 | struct shash_desc *desc = *descp; | |
5f7082ed HX |
378 | struct crypto_hash_walk walk; |
379 | int nbytes; | |
380 | ||
381 | for (nbytes = crypto_hash_walk_first_compat(hdesc, &walk, sg, len); | |
382 | nbytes > 0; nbytes = crypto_hash_walk_done(&walk, nbytes)) | |
383 | nbytes = crypto_shash_update(desc, walk.data, nbytes); | |
384 | ||
385 | return nbytes; | |
386 | } | |
387 | ||
388 | static int shash_compat_final(struct hash_desc *hdesc, u8 *out) | |
389 | { | |
113adefc HX |
390 | struct shash_desc **descp = crypto_hash_ctx(hdesc->tfm); |
391 | ||
392 | return crypto_shash_final(*descp, out); | |
5f7082ed HX |
393 | } |
394 | ||
395 | static int shash_compat_digest(struct hash_desc *hdesc, struct scatterlist *sg, | |
396 | unsigned int nbytes, u8 *out) | |
397 | { | |
398 | unsigned int offset = sg->offset; | |
399 | int err; | |
400 | ||
401 | if (nbytes < min(sg->length, ((unsigned int)(PAGE_SIZE)) - offset)) { | |
113adefc HX |
402 | struct shash_desc **descp = crypto_hash_ctx(hdesc->tfm); |
403 | struct shash_desc *desc = *descp; | |
5f7082ed HX |
404 | void *data; |
405 | ||
406 | desc->flags = hdesc->flags; | |
407 | ||
408 | data = crypto_kmap(sg_page(sg), 0); | |
409 | err = crypto_shash_digest(desc, data + offset, nbytes, out); | |
410 | crypto_kunmap(data, 0); | |
411 | crypto_yield(desc->flags); | |
412 | goto out; | |
413 | } | |
414 | ||
415 | err = shash_compat_init(hdesc); | |
416 | if (err) | |
417 | goto out; | |
418 | ||
419 | err = shash_compat_update(hdesc, sg, nbytes); | |
420 | if (err) | |
421 | goto out; | |
422 | ||
423 | err = shash_compat_final(hdesc, out); | |
424 | ||
425 | out: | |
426 | return err; | |
427 | } | |
428 | ||
429 | static void crypto_exit_shash_ops_compat(struct crypto_tfm *tfm) | |
430 | { | |
113adefc HX |
431 | struct shash_desc **descp = crypto_tfm_ctx(tfm); |
432 | struct shash_desc *desc = *descp; | |
5f7082ed HX |
433 | |
434 | crypto_free_shash(desc->tfm); | |
113adefc | 435 | kzfree(desc); |
5f7082ed HX |
436 | } |
437 | ||
438 | static int crypto_init_shash_ops_compat(struct crypto_tfm *tfm) | |
439 | { | |
440 | struct hash_tfm *crt = &tfm->crt_hash; | |
441 | struct crypto_alg *calg = tfm->__crt_alg; | |
442 | struct shash_alg *alg = __crypto_shash_alg(calg); | |
113adefc | 443 | struct shash_desc **descp = crypto_tfm_ctx(tfm); |
5f7082ed | 444 | struct crypto_shash *shash; |
113adefc | 445 | struct shash_desc *desc; |
5f7082ed | 446 | |
4abfd73e AKR |
447 | if (!crypto_mod_get(calg)) |
448 | return -EAGAIN; | |
449 | ||
3f683d61 | 450 | shash = crypto_create_tfm(calg, &crypto_shash_type); |
4abfd73e AKR |
451 | if (IS_ERR(shash)) { |
452 | crypto_mod_put(calg); | |
5f7082ed | 453 | return PTR_ERR(shash); |
4abfd73e | 454 | } |
5f7082ed | 455 | |
113adefc HX |
456 | desc = kmalloc(sizeof(*desc) + crypto_shash_descsize(shash), |
457 | GFP_KERNEL); | |
458 | if (!desc) { | |
459 | crypto_free_shash(shash); | |
460 | return -ENOMEM; | |
461 | } | |
462 | ||
463 | *descp = desc; | |
5f7082ed HX |
464 | desc->tfm = shash; |
465 | tfm->exit = crypto_exit_shash_ops_compat; | |
466 | ||
467 | crt->init = shash_compat_init; | |
468 | crt->update = shash_compat_update; | |
469 | crt->final = shash_compat_final; | |
470 | crt->digest = shash_compat_digest; | |
471 | crt->setkey = shash_compat_setkey; | |
472 | ||
473 | crt->digestsize = alg->digestsize; | |
474 | ||
475 | return 0; | |
476 | } | |
477 | ||
3b2f6df0 HX |
478 | static int crypto_init_shash_ops(struct crypto_tfm *tfm, u32 type, u32 mask) |
479 | { | |
480 | switch (mask & CRYPTO_ALG_TYPE_MASK) { | |
5f7082ed HX |
481 | case CRYPTO_ALG_TYPE_HASH_MASK: |
482 | return crypto_init_shash_ops_compat(tfm); | |
3b2f6df0 HX |
483 | } |
484 | ||
485 | return -EINVAL; | |
486 | } | |
487 | ||
488 | static unsigned int crypto_shash_ctxsize(struct crypto_alg *alg, u32 type, | |
489 | u32 mask) | |
490 | { | |
491 | switch (mask & CRYPTO_ALG_TYPE_MASK) { | |
5f7082ed | 492 | case CRYPTO_ALG_TYPE_HASH_MASK: |
113adefc | 493 | return sizeof(struct shash_desc *); |
3b2f6df0 HX |
494 | } |
495 | ||
496 | return 0; | |
497 | } | |
498 | ||
2ca33da1 | 499 | static int crypto_shash_init_tfm(struct crypto_tfm *tfm) |
7b5a080b | 500 | { |
113adefc HX |
501 | struct crypto_shash *hash = __crypto_shash_cast(tfm); |
502 | ||
503 | hash->descsize = crypto_shash_alg(hash)->descsize; | |
7b5a080b HX |
504 | return 0; |
505 | } | |
506 | ||
2ca33da1 | 507 | static unsigned int crypto_shash_extsize(struct crypto_alg *alg) |
7b5a080b HX |
508 | { |
509 | return alg->cra_ctxsize; | |
510 | } | |
511 | ||
512 | static void crypto_shash_show(struct seq_file *m, struct crypto_alg *alg) | |
513 | __attribute__ ((unused)); | |
514 | static void crypto_shash_show(struct seq_file *m, struct crypto_alg *alg) | |
515 | { | |
516 | struct shash_alg *salg = __crypto_shash_alg(alg); | |
517 | ||
518 | seq_printf(m, "type : shash\n"); | |
519 | seq_printf(m, "blocksize : %u\n", alg->cra_blocksize); | |
520 | seq_printf(m, "digestsize : %u\n", salg->digestsize); | |
7b5a080b HX |
521 | } |
522 | ||
523 | static const struct crypto_type crypto_shash_type = { | |
3b2f6df0 | 524 | .ctxsize = crypto_shash_ctxsize, |
7b5a080b | 525 | .extsize = crypto_shash_extsize, |
3b2f6df0 | 526 | .init = crypto_init_shash_ops, |
7b5a080b HX |
527 | .init_tfm = crypto_shash_init_tfm, |
528 | #ifdef CONFIG_PROC_FS | |
529 | .show = crypto_shash_show, | |
530 | #endif | |
531 | .maskclear = ~CRYPTO_ALG_TYPE_MASK, | |
532 | .maskset = CRYPTO_ALG_TYPE_MASK, | |
533 | .type = CRYPTO_ALG_TYPE_SHASH, | |
534 | .tfmsize = offsetof(struct crypto_shash, base), | |
535 | }; | |
536 | ||
537 | struct crypto_shash *crypto_alloc_shash(const char *alg_name, u32 type, | |
538 | u32 mask) | |
539 | { | |
3f683d61 | 540 | return crypto_alloc_tfm(alg_name, &crypto_shash_type, type, mask); |
7b5a080b HX |
541 | } |
542 | EXPORT_SYMBOL_GPL(crypto_alloc_shash); | |
543 | ||
619a6ebd | 544 | static int shash_prepare_alg(struct shash_alg *alg) |
7b5a080b HX |
545 | { |
546 | struct crypto_alg *base = &alg->base; | |
547 | ||
548 | if (alg->digestsize > PAGE_SIZE / 8 || | |
99d27e1c HX |
549 | alg->descsize > PAGE_SIZE / 8 || |
550 | alg->statesize > PAGE_SIZE / 8) | |
7b5a080b HX |
551 | return -EINVAL; |
552 | ||
553 | base->cra_type = &crypto_shash_type; | |
554 | base->cra_flags &= ~CRYPTO_ALG_TYPE_MASK; | |
555 | base->cra_flags |= CRYPTO_ALG_TYPE_SHASH; | |
99d27e1c | 556 | |
8267adab HX |
557 | if (!alg->finup) |
558 | alg->finup = shash_finup_unaligned; | |
559 | if (!alg->digest) | |
560 | alg->digest = shash_digest_unaligned; | |
99d27e1c HX |
561 | if (!alg->import) |
562 | alg->import = shash_no_import; | |
563 | if (!alg->export) | |
564 | alg->export = shash_no_export; | |
57cfe44b HX |
565 | if (!alg->setkey) |
566 | alg->setkey = shash_no_setkey; | |
99d27e1c | 567 | |
619a6ebd HX |
568 | return 0; |
569 | } | |
570 | ||
571 | int crypto_register_shash(struct shash_alg *alg) | |
572 | { | |
573 | struct crypto_alg *base = &alg->base; | |
574 | int err; | |
575 | ||
576 | err = shash_prepare_alg(alg); | |
577 | if (err) | |
578 | return err; | |
7b5a080b HX |
579 | |
580 | return crypto_register_alg(base); | |
581 | } | |
582 | EXPORT_SYMBOL_GPL(crypto_register_shash); | |
583 | ||
584 | int crypto_unregister_shash(struct shash_alg *alg) | |
585 | { | |
586 | return crypto_unregister_alg(&alg->base); | |
587 | } | |
588 | EXPORT_SYMBOL_GPL(crypto_unregister_shash); | |
589 | ||
619a6ebd HX |
590 | int shash_register_instance(struct crypto_template *tmpl, |
591 | struct shash_instance *inst) | |
592 | { | |
593 | int err; | |
594 | ||
595 | err = shash_prepare_alg(&inst->alg); | |
596 | if (err) | |
597 | return err; | |
598 | ||
599 | return crypto_register_instance(tmpl, shash_crypto_instance(inst)); | |
600 | } | |
601 | EXPORT_SYMBOL_GPL(shash_register_instance); | |
602 | ||
2e4fddd8 HX |
603 | void shash_free_instance(struct crypto_instance *inst) |
604 | { | |
605 | crypto_drop_spawn(crypto_instance_ctx(inst)); | |
606 | kfree(shash_instance(inst)); | |
607 | } | |
608 | EXPORT_SYMBOL_GPL(shash_free_instance); | |
609 | ||
94296999 HX |
610 | int crypto_init_shash_spawn(struct crypto_shash_spawn *spawn, |
611 | struct shash_alg *alg, | |
612 | struct crypto_instance *inst) | |
613 | { | |
614 | return crypto_init_spawn2(&spawn->base, &alg->base, inst, | |
615 | &crypto_shash_type); | |
616 | } | |
617 | EXPORT_SYMBOL_GPL(crypto_init_shash_spawn); | |
618 | ||
7d6f5640 HX |
619 | struct shash_alg *shash_attr_alg(struct rtattr *rta, u32 type, u32 mask) |
620 | { | |
621 | struct crypto_alg *alg; | |
622 | ||
623 | alg = crypto_attr_alg2(rta, &crypto_shash_type, type, mask); | |
624 | return IS_ERR(alg) ? ERR_CAST(alg) : | |
625 | container_of(alg, struct shash_alg, base); | |
626 | } | |
627 | EXPORT_SYMBOL_GPL(shash_attr_alg); | |
628 | ||
7b5a080b HX |
629 | MODULE_LICENSE("GPL"); |
630 | MODULE_DESCRIPTION("Synchronous cryptographic hash type"); |