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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> | |
7b5a080b | 22 | |
3b2f6df0 HX |
23 | #include "internal.h" |
24 | ||
3f683d61 HX |
25 | static const struct crypto_type crypto_shash_type; |
26 | ||
59f8b033 EB |
27 | int shash_no_setkey(struct crypto_shash *tfm, const u8 *key, |
28 | unsigned int keylen) | |
57cfe44b HX |
29 | { |
30 | return -ENOSYS; | |
31 | } | |
59f8b033 | 32 | EXPORT_SYMBOL_GPL(shash_no_setkey); |
57cfe44b | 33 | |
7b5a080b HX |
34 | static int shash_setkey_unaligned(struct crypto_shash *tfm, const u8 *key, |
35 | unsigned int keylen) | |
36 | { | |
37 | struct shash_alg *shash = crypto_shash_alg(tfm); | |
38 | unsigned long alignmask = crypto_shash_alignmask(tfm); | |
39 | unsigned long absize; | |
40 | u8 *buffer, *alignbuffer; | |
41 | int err; | |
42 | ||
18eb8ea6 | 43 | absize = keylen + (alignmask & ~(crypto_tfm_ctx_alignment() - 1)); |
7b5a080b HX |
44 | buffer = kmalloc(absize, GFP_KERNEL); |
45 | if (!buffer) | |
46 | return -ENOMEM; | |
47 | ||
48 | alignbuffer = (u8 *)ALIGN((unsigned long)buffer, alignmask + 1); | |
49 | memcpy(alignbuffer, key, keylen); | |
50 | err = shash->setkey(tfm, alignbuffer, keylen); | |
8c32c516 | 51 | kzfree(buffer); |
7b5a080b HX |
52 | return err; |
53 | } | |
54 | ||
55 | int crypto_shash_setkey(struct crypto_shash *tfm, const u8 *key, | |
56 | unsigned int keylen) | |
57 | { | |
58 | struct shash_alg *shash = crypto_shash_alg(tfm); | |
59 | unsigned long alignmask = crypto_shash_alignmask(tfm); | |
60 | ||
61 | if ((unsigned long)key & alignmask) | |
62 | return shash_setkey_unaligned(tfm, key, keylen); | |
63 | ||
64 | return shash->setkey(tfm, key, keylen); | |
65 | } | |
66 | EXPORT_SYMBOL_GPL(crypto_shash_setkey); | |
67 | ||
68 | static inline unsigned int shash_align_buffer_size(unsigned len, | |
69 | unsigned long mask) | |
70 | { | |
66d8ea57 MC |
71 | typedef u8 __attribute__ ((aligned)) u8_aligned; |
72 | return len + (mask & ~(__alignof__(u8_aligned) - 1)); | |
7b5a080b HX |
73 | } |
74 | ||
75 | static int shash_update_unaligned(struct shash_desc *desc, const u8 *data, | |
76 | unsigned int len) | |
77 | { | |
78 | struct crypto_shash *tfm = desc->tfm; | |
79 | struct shash_alg *shash = crypto_shash_alg(tfm); | |
80 | unsigned long alignmask = crypto_shash_alignmask(tfm); | |
81 | unsigned int unaligned_len = alignmask + 1 - | |
82 | ((unsigned long)data & alignmask); | |
0e2d3a12 | 83 | u8 ubuf[shash_align_buffer_size(unaligned_len, alignmask)] |
7b5a080b | 84 | __attribute__ ((aligned)); |
0e2d3a12 | 85 | u8 *buf = PTR_ALIGN(&ubuf[0], alignmask + 1); |
8c32c516 | 86 | int err; |
7b5a080b | 87 | |
f4f68993 YS |
88 | if (unaligned_len > len) |
89 | unaligned_len = len; | |
90 | ||
7b5a080b | 91 | memcpy(buf, data, unaligned_len); |
8c32c516 HX |
92 | err = shash->update(desc, buf, unaligned_len); |
93 | memset(buf, 0, unaligned_len); | |
7b5a080b | 94 | |
8c32c516 | 95 | return err ?: |
7b5a080b HX |
96 | shash->update(desc, data + unaligned_len, len - unaligned_len); |
97 | } | |
98 | ||
99 | int crypto_shash_update(struct shash_desc *desc, const u8 *data, | |
100 | unsigned int len) | |
101 | { | |
102 | struct crypto_shash *tfm = desc->tfm; | |
103 | struct shash_alg *shash = crypto_shash_alg(tfm); | |
104 | unsigned long alignmask = crypto_shash_alignmask(tfm); | |
105 | ||
106 | if ((unsigned long)data & alignmask) | |
107 | return shash_update_unaligned(desc, data, len); | |
108 | ||
109 | return shash->update(desc, data, len); | |
110 | } | |
111 | EXPORT_SYMBOL_GPL(crypto_shash_update); | |
112 | ||
113 | static int shash_final_unaligned(struct shash_desc *desc, u8 *out) | |
114 | { | |
115 | struct crypto_shash *tfm = desc->tfm; | |
116 | unsigned long alignmask = crypto_shash_alignmask(tfm); | |
117 | struct shash_alg *shash = crypto_shash_alg(tfm); | |
118 | unsigned int ds = crypto_shash_digestsize(tfm); | |
0e2d3a12 | 119 | u8 ubuf[shash_align_buffer_size(ds, alignmask)] |
7b5a080b | 120 | __attribute__ ((aligned)); |
0e2d3a12 | 121 | u8 *buf = PTR_ALIGN(&ubuf[0], alignmask + 1); |
7b5a080b HX |
122 | int err; |
123 | ||
124 | err = shash->final(desc, buf); | |
8c32c516 HX |
125 | if (err) |
126 | goto out; | |
127 | ||
7b5a080b | 128 | memcpy(out, buf, ds); |
8c32c516 HX |
129 | |
130 | out: | |
131 | memset(buf, 0, ds); | |
7b5a080b HX |
132 | return err; |
133 | } | |
134 | ||
135 | int crypto_shash_final(struct shash_desc *desc, u8 *out) | |
136 | { | |
137 | struct crypto_shash *tfm = desc->tfm; | |
138 | struct shash_alg *shash = crypto_shash_alg(tfm); | |
139 | unsigned long alignmask = crypto_shash_alignmask(tfm); | |
140 | ||
141 | if ((unsigned long)out & alignmask) | |
142 | return shash_final_unaligned(desc, out); | |
143 | ||
144 | return shash->final(desc, out); | |
145 | } | |
146 | EXPORT_SYMBOL_GPL(crypto_shash_final); | |
147 | ||
148 | static int shash_finup_unaligned(struct shash_desc *desc, const u8 *data, | |
149 | unsigned int len, u8 *out) | |
150 | { | |
151 | return crypto_shash_update(desc, data, len) ?: | |
152 | crypto_shash_final(desc, out); | |
153 | } | |
154 | ||
155 | int crypto_shash_finup(struct shash_desc *desc, const u8 *data, | |
156 | unsigned int len, u8 *out) | |
157 | { | |
158 | struct crypto_shash *tfm = desc->tfm; | |
159 | struct shash_alg *shash = crypto_shash_alg(tfm); | |
160 | unsigned long alignmask = crypto_shash_alignmask(tfm); | |
161 | ||
8267adab | 162 | if (((unsigned long)data | (unsigned long)out) & alignmask) |
7b5a080b HX |
163 | return shash_finup_unaligned(desc, data, len, out); |
164 | ||
165 | return shash->finup(desc, data, len, out); | |
166 | } | |
167 | EXPORT_SYMBOL_GPL(crypto_shash_finup); | |
168 | ||
169 | static int shash_digest_unaligned(struct shash_desc *desc, const u8 *data, | |
170 | unsigned int len, u8 *out) | |
171 | { | |
172 | return crypto_shash_init(desc) ?: | |
f88ad8de | 173 | crypto_shash_finup(desc, data, len, out); |
7b5a080b HX |
174 | } |
175 | ||
176 | int crypto_shash_digest(struct shash_desc *desc, const u8 *data, | |
177 | unsigned int len, u8 *out) | |
178 | { | |
179 | struct crypto_shash *tfm = desc->tfm; | |
180 | struct shash_alg *shash = crypto_shash_alg(tfm); | |
181 | unsigned long alignmask = crypto_shash_alignmask(tfm); | |
182 | ||
8267adab | 183 | if (((unsigned long)data | (unsigned long)out) & alignmask) |
7b5a080b HX |
184 | return shash_digest_unaligned(desc, data, len, out); |
185 | ||
186 | return shash->digest(desc, data, len, out); | |
187 | } | |
188 | EXPORT_SYMBOL_GPL(crypto_shash_digest); | |
189 | ||
f592682f | 190 | static int shash_default_export(struct shash_desc *desc, void *out) |
dec8b786 | 191 | { |
f592682f HX |
192 | memcpy(out, shash_desc_ctx(desc), crypto_shash_descsize(desc->tfm)); |
193 | return 0; | |
99d27e1c | 194 | } |
dec8b786 | 195 | |
f592682f | 196 | static int shash_default_import(struct shash_desc *desc, const void *in) |
99d27e1c | 197 | { |
f592682f HX |
198 | memcpy(shash_desc_ctx(desc), in, crypto_shash_descsize(desc->tfm)); |
199 | return 0; | |
dec8b786 | 200 | } |
dec8b786 | 201 | |
3b2f6df0 HX |
202 | static int shash_async_setkey(struct crypto_ahash *tfm, const u8 *key, |
203 | unsigned int keylen) | |
204 | { | |
205 | struct crypto_shash **ctx = crypto_ahash_ctx(tfm); | |
206 | ||
207 | return crypto_shash_setkey(*ctx, key, keylen); | |
208 | } | |
209 | ||
210 | static int shash_async_init(struct ahash_request *req) | |
211 | { | |
212 | struct crypto_shash **ctx = crypto_ahash_ctx(crypto_ahash_reqtfm(req)); | |
213 | struct shash_desc *desc = ahash_request_ctx(req); | |
214 | ||
215 | desc->tfm = *ctx; | |
216 | desc->flags = req->base.flags; | |
217 | ||
218 | return crypto_shash_init(desc); | |
219 | } | |
220 | ||
7eddf95e | 221 | int shash_ahash_update(struct ahash_request *req, struct shash_desc *desc) |
3b2f6df0 | 222 | { |
3b2f6df0 HX |
223 | struct crypto_hash_walk walk; |
224 | int nbytes; | |
225 | ||
226 | for (nbytes = crypto_hash_walk_first(req, &walk); nbytes > 0; | |
227 | nbytes = crypto_hash_walk_done(&walk, nbytes)) | |
228 | nbytes = crypto_shash_update(desc, walk.data, nbytes); | |
229 | ||
230 | return nbytes; | |
231 | } | |
7eddf95e HX |
232 | EXPORT_SYMBOL_GPL(shash_ahash_update); |
233 | ||
234 | static int shash_async_update(struct ahash_request *req) | |
235 | { | |
236 | return shash_ahash_update(req, ahash_request_ctx(req)); | |
237 | } | |
3b2f6df0 HX |
238 | |
239 | static int shash_async_final(struct ahash_request *req) | |
240 | { | |
241 | return crypto_shash_final(ahash_request_ctx(req), req->result); | |
242 | } | |
243 | ||
66f6ce5e HX |
244 | int shash_ahash_finup(struct ahash_request *req, struct shash_desc *desc) |
245 | { | |
246 | struct crypto_hash_walk walk; | |
247 | int nbytes; | |
248 | ||
cbc86b91 HX |
249 | nbytes = crypto_hash_walk_first(req, &walk); |
250 | if (!nbytes) | |
251 | return crypto_shash_final(desc, req->result); | |
252 | ||
253 | do { | |
66f6ce5e HX |
254 | nbytes = crypto_hash_walk_last(&walk) ? |
255 | crypto_shash_finup(desc, walk.data, nbytes, | |
256 | req->result) : | |
257 | crypto_shash_update(desc, walk.data, nbytes); | |
cbc86b91 HX |
258 | nbytes = crypto_hash_walk_done(&walk, nbytes); |
259 | } while (nbytes > 0); | |
66f6ce5e HX |
260 | |
261 | return nbytes; | |
262 | } | |
263 | EXPORT_SYMBOL_GPL(shash_ahash_finup); | |
264 | ||
265 | static int shash_async_finup(struct ahash_request *req) | |
266 | { | |
267 | struct crypto_shash **ctx = crypto_ahash_ctx(crypto_ahash_reqtfm(req)); | |
268 | struct shash_desc *desc = ahash_request_ctx(req); | |
269 | ||
270 | desc->tfm = *ctx; | |
271 | desc->flags = req->base.flags; | |
272 | ||
273 | return shash_ahash_finup(req, desc); | |
274 | } | |
275 | ||
7eddf95e | 276 | int shash_ahash_digest(struct ahash_request *req, struct shash_desc *desc) |
3b2f6df0 | 277 | { |
3b2f6df0 | 278 | unsigned int nbytes = req->nbytes; |
57b391a7 HX |
279 | struct scatterlist *sg; |
280 | unsigned int offset; | |
3b2f6df0 HX |
281 | int err; |
282 | ||
57b391a7 HX |
283 | if (nbytes && |
284 | (sg = req->src, offset = sg->offset, | |
285 | nbytes < min(sg->length, ((unsigned int)(PAGE_SIZE)) - offset))) { | |
3b2f6df0 HX |
286 | void *data; |
287 | ||
f0dfc0b0 | 288 | data = kmap_atomic(sg_page(sg)); |
3b2f6df0 HX |
289 | err = crypto_shash_digest(desc, data + offset, nbytes, |
290 | req->result); | |
f0dfc0b0 | 291 | kunmap_atomic(data); |
3b2f6df0 | 292 | crypto_yield(desc->flags); |
7eddf95e HX |
293 | } else |
294 | err = crypto_shash_init(desc) ?: | |
66f6ce5e | 295 | shash_ahash_finup(req, desc); |
3b2f6df0 | 296 | |
7eddf95e HX |
297 | return err; |
298 | } | |
299 | EXPORT_SYMBOL_GPL(shash_ahash_digest); | |
3b2f6df0 | 300 | |
7eddf95e HX |
301 | static int shash_async_digest(struct ahash_request *req) |
302 | { | |
303 | struct crypto_shash **ctx = crypto_ahash_ctx(crypto_ahash_reqtfm(req)); | |
304 | struct shash_desc *desc = ahash_request_ctx(req); | |
3b2f6df0 | 305 | |
7eddf95e HX |
306 | desc->tfm = *ctx; |
307 | desc->flags = req->base.flags; | |
3b2f6df0 | 308 | |
7eddf95e | 309 | return shash_ahash_digest(req, desc); |
3b2f6df0 HX |
310 | } |
311 | ||
66f6ce5e HX |
312 | static int shash_async_export(struct ahash_request *req, void *out) |
313 | { | |
314 | return crypto_shash_export(ahash_request_ctx(req), out); | |
315 | } | |
316 | ||
317 | static int shash_async_import(struct ahash_request *req, const void *in) | |
318 | { | |
90246e79 HX |
319 | struct crypto_shash **ctx = crypto_ahash_ctx(crypto_ahash_reqtfm(req)); |
320 | struct shash_desc *desc = ahash_request_ctx(req); | |
321 | ||
322 | desc->tfm = *ctx; | |
323 | desc->flags = req->base.flags; | |
324 | ||
325 | return crypto_shash_import(desc, in); | |
66f6ce5e HX |
326 | } |
327 | ||
3b2f6df0 HX |
328 | static void crypto_exit_shash_ops_async(struct crypto_tfm *tfm) |
329 | { | |
330 | struct crypto_shash **ctx = crypto_tfm_ctx(tfm); | |
331 | ||
332 | crypto_free_shash(*ctx); | |
333 | } | |
334 | ||
88056ec3 | 335 | int crypto_init_shash_ops_async(struct crypto_tfm *tfm) |
3b2f6df0 HX |
336 | { |
337 | struct crypto_alg *calg = tfm->__crt_alg; | |
66f6ce5e | 338 | struct shash_alg *alg = __crypto_shash_alg(calg); |
88056ec3 | 339 | struct crypto_ahash *crt = __crypto_ahash_cast(tfm); |
3b2f6df0 HX |
340 | struct crypto_shash **ctx = crypto_tfm_ctx(tfm); |
341 | struct crypto_shash *shash; | |
342 | ||
343 | if (!crypto_mod_get(calg)) | |
344 | return -EAGAIN; | |
345 | ||
3f683d61 | 346 | shash = crypto_create_tfm(calg, &crypto_shash_type); |
3b2f6df0 HX |
347 | if (IS_ERR(shash)) { |
348 | crypto_mod_put(calg); | |
349 | return PTR_ERR(shash); | |
350 | } | |
351 | ||
352 | *ctx = shash; | |
353 | tfm->exit = crypto_exit_shash_ops_async; | |
354 | ||
355 | crt->init = shash_async_init; | |
356 | crt->update = shash_async_update; | |
66f6ce5e HX |
357 | crt->final = shash_async_final; |
358 | crt->finup = shash_async_finup; | |
3b2f6df0 | 359 | crt->digest = shash_async_digest; |
6bb06a4f HX |
360 | crt->setkey = shash_async_setkey; |
361 | ||
362 | crt->has_setkey = alg->setkey != shash_no_setkey; | |
66f6ce5e | 363 | |
66f6ce5e HX |
364 | if (alg->export) |
365 | crt->export = shash_async_export; | |
0044f3ed | 366 | if (alg->import) |
66f6ce5e | 367 | crt->import = shash_async_import; |
3b2f6df0 | 368 | |
3b2f6df0 HX |
369 | crt->reqsize = sizeof(struct shash_desc) + crypto_shash_descsize(shash); |
370 | ||
371 | return 0; | |
372 | } | |
373 | ||
5f7082ed HX |
374 | static int shash_compat_setkey(struct crypto_hash *tfm, const u8 *key, |
375 | unsigned int keylen) | |
376 | { | |
113adefc HX |
377 | struct shash_desc **descp = crypto_hash_ctx(tfm); |
378 | struct shash_desc *desc = *descp; | |
5f7082ed HX |
379 | |
380 | return crypto_shash_setkey(desc->tfm, key, keylen); | |
381 | } | |
382 | ||
383 | static int shash_compat_init(struct hash_desc *hdesc) | |
384 | { | |
113adefc HX |
385 | struct shash_desc **descp = crypto_hash_ctx(hdesc->tfm); |
386 | struct shash_desc *desc = *descp; | |
5f7082ed HX |
387 | |
388 | desc->flags = hdesc->flags; | |
389 | ||
390 | return crypto_shash_init(desc); | |
391 | } | |
392 | ||
393 | static int shash_compat_update(struct hash_desc *hdesc, struct scatterlist *sg, | |
394 | unsigned int len) | |
395 | { | |
113adefc HX |
396 | struct shash_desc **descp = crypto_hash_ctx(hdesc->tfm); |
397 | struct shash_desc *desc = *descp; | |
5f7082ed HX |
398 | struct crypto_hash_walk walk; |
399 | int nbytes; | |
400 | ||
401 | for (nbytes = crypto_hash_walk_first_compat(hdesc, &walk, sg, len); | |
402 | nbytes > 0; nbytes = crypto_hash_walk_done(&walk, nbytes)) | |
403 | nbytes = crypto_shash_update(desc, walk.data, nbytes); | |
404 | ||
405 | return nbytes; | |
406 | } | |
407 | ||
408 | static int shash_compat_final(struct hash_desc *hdesc, u8 *out) | |
409 | { | |
113adefc HX |
410 | struct shash_desc **descp = crypto_hash_ctx(hdesc->tfm); |
411 | ||
412 | return crypto_shash_final(*descp, out); | |
5f7082ed HX |
413 | } |
414 | ||
415 | static int shash_compat_digest(struct hash_desc *hdesc, struct scatterlist *sg, | |
416 | unsigned int nbytes, u8 *out) | |
417 | { | |
418 | unsigned int offset = sg->offset; | |
419 | int err; | |
420 | ||
421 | if (nbytes < min(sg->length, ((unsigned int)(PAGE_SIZE)) - offset)) { | |
113adefc HX |
422 | struct shash_desc **descp = crypto_hash_ctx(hdesc->tfm); |
423 | struct shash_desc *desc = *descp; | |
5f7082ed HX |
424 | void *data; |
425 | ||
426 | desc->flags = hdesc->flags; | |
427 | ||
f0dfc0b0 | 428 | data = kmap_atomic(sg_page(sg)); |
5f7082ed | 429 | err = crypto_shash_digest(desc, data + offset, nbytes, out); |
f0dfc0b0 | 430 | kunmap_atomic(data); |
5f7082ed HX |
431 | crypto_yield(desc->flags); |
432 | goto out; | |
433 | } | |
434 | ||
435 | err = shash_compat_init(hdesc); | |
436 | if (err) | |
437 | goto out; | |
438 | ||
439 | err = shash_compat_update(hdesc, sg, nbytes); | |
440 | if (err) | |
441 | goto out; | |
442 | ||
443 | err = shash_compat_final(hdesc, out); | |
444 | ||
445 | out: | |
446 | return err; | |
447 | } | |
448 | ||
449 | static void crypto_exit_shash_ops_compat(struct crypto_tfm *tfm) | |
450 | { | |
113adefc HX |
451 | struct shash_desc **descp = crypto_tfm_ctx(tfm); |
452 | struct shash_desc *desc = *descp; | |
5f7082ed HX |
453 | |
454 | crypto_free_shash(desc->tfm); | |
113adefc | 455 | kzfree(desc); |
5f7082ed HX |
456 | } |
457 | ||
458 | static int crypto_init_shash_ops_compat(struct crypto_tfm *tfm) | |
459 | { | |
460 | struct hash_tfm *crt = &tfm->crt_hash; | |
461 | struct crypto_alg *calg = tfm->__crt_alg; | |
462 | struct shash_alg *alg = __crypto_shash_alg(calg); | |
113adefc | 463 | struct shash_desc **descp = crypto_tfm_ctx(tfm); |
5f7082ed | 464 | struct crypto_shash *shash; |
113adefc | 465 | struct shash_desc *desc; |
5f7082ed | 466 | |
4abfd73e AKR |
467 | if (!crypto_mod_get(calg)) |
468 | return -EAGAIN; | |
469 | ||
3f683d61 | 470 | shash = crypto_create_tfm(calg, &crypto_shash_type); |
4abfd73e AKR |
471 | if (IS_ERR(shash)) { |
472 | crypto_mod_put(calg); | |
5f7082ed | 473 | return PTR_ERR(shash); |
4abfd73e | 474 | } |
5f7082ed | 475 | |
113adefc HX |
476 | desc = kmalloc(sizeof(*desc) + crypto_shash_descsize(shash), |
477 | GFP_KERNEL); | |
478 | if (!desc) { | |
479 | crypto_free_shash(shash); | |
480 | return -ENOMEM; | |
481 | } | |
482 | ||
483 | *descp = desc; | |
5f7082ed HX |
484 | desc->tfm = shash; |
485 | tfm->exit = crypto_exit_shash_ops_compat; | |
486 | ||
487 | crt->init = shash_compat_init; | |
488 | crt->update = shash_compat_update; | |
489 | crt->final = shash_compat_final; | |
490 | crt->digest = shash_compat_digest; | |
491 | crt->setkey = shash_compat_setkey; | |
492 | ||
493 | crt->digestsize = alg->digestsize; | |
494 | ||
495 | return 0; | |
496 | } | |
497 | ||
3b2f6df0 HX |
498 | static int crypto_init_shash_ops(struct crypto_tfm *tfm, u32 type, u32 mask) |
499 | { | |
500 | switch (mask & CRYPTO_ALG_TYPE_MASK) { | |
5f7082ed HX |
501 | case CRYPTO_ALG_TYPE_HASH_MASK: |
502 | return crypto_init_shash_ops_compat(tfm); | |
3b2f6df0 HX |
503 | } |
504 | ||
505 | return -EINVAL; | |
506 | } | |
507 | ||
508 | static unsigned int crypto_shash_ctxsize(struct crypto_alg *alg, u32 type, | |
509 | u32 mask) | |
510 | { | |
511 | switch (mask & CRYPTO_ALG_TYPE_MASK) { | |
5f7082ed | 512 | case CRYPTO_ALG_TYPE_HASH_MASK: |
113adefc | 513 | return sizeof(struct shash_desc *); |
3b2f6df0 HX |
514 | } |
515 | ||
516 | return 0; | |
517 | } | |
518 | ||
2ca33da1 | 519 | static int crypto_shash_init_tfm(struct crypto_tfm *tfm) |
7b5a080b | 520 | { |
113adefc HX |
521 | struct crypto_shash *hash = __crypto_shash_cast(tfm); |
522 | ||
523 | hash->descsize = crypto_shash_alg(hash)->descsize; | |
7b5a080b HX |
524 | return 0; |
525 | } | |
526 | ||
3acc8473 | 527 | #ifdef CONFIG_NET |
f4d663ce SK |
528 | static int crypto_shash_report(struct sk_buff *skb, struct crypto_alg *alg) |
529 | { | |
530 | struct crypto_report_hash rhash; | |
531 | struct shash_alg *salg = __crypto_shash_alg(alg); | |
532 | ||
9a5467bf MK |
533 | strncpy(rhash.type, "shash", sizeof(rhash.type)); |
534 | ||
f4d663ce SK |
535 | rhash.blocksize = alg->cra_blocksize; |
536 | rhash.digestsize = salg->digestsize; | |
537 | ||
6662df33 DM |
538 | if (nla_put(skb, CRYPTOCFGA_REPORT_HASH, |
539 | sizeof(struct crypto_report_hash), &rhash)) | |
540 | goto nla_put_failure; | |
f4d663ce SK |
541 | return 0; |
542 | ||
543 | nla_put_failure: | |
544 | return -EMSGSIZE; | |
545 | } | |
3acc8473 HX |
546 | #else |
547 | static int crypto_shash_report(struct sk_buff *skb, struct crypto_alg *alg) | |
548 | { | |
549 | return -ENOSYS; | |
550 | } | |
551 | #endif | |
f4d663ce | 552 | |
7b5a080b HX |
553 | static void crypto_shash_show(struct seq_file *m, struct crypto_alg *alg) |
554 | __attribute__ ((unused)); | |
555 | static void crypto_shash_show(struct seq_file *m, struct crypto_alg *alg) | |
556 | { | |
557 | struct shash_alg *salg = __crypto_shash_alg(alg); | |
558 | ||
559 | seq_printf(m, "type : shash\n"); | |
560 | seq_printf(m, "blocksize : %u\n", alg->cra_blocksize); | |
561 | seq_printf(m, "digestsize : %u\n", salg->digestsize); | |
7b5a080b HX |
562 | } |
563 | ||
564 | static const struct crypto_type crypto_shash_type = { | |
3b2f6df0 | 565 | .ctxsize = crypto_shash_ctxsize, |
ac611680 | 566 | .extsize = crypto_alg_extsize, |
3b2f6df0 | 567 | .init = crypto_init_shash_ops, |
7b5a080b HX |
568 | .init_tfm = crypto_shash_init_tfm, |
569 | #ifdef CONFIG_PROC_FS | |
570 | .show = crypto_shash_show, | |
571 | #endif | |
f4d663ce | 572 | .report = crypto_shash_report, |
7b5a080b HX |
573 | .maskclear = ~CRYPTO_ALG_TYPE_MASK, |
574 | .maskset = CRYPTO_ALG_TYPE_MASK, | |
575 | .type = CRYPTO_ALG_TYPE_SHASH, | |
576 | .tfmsize = offsetof(struct crypto_shash, base), | |
577 | }; | |
578 | ||
579 | struct crypto_shash *crypto_alloc_shash(const char *alg_name, u32 type, | |
580 | u32 mask) | |
581 | { | |
3f683d61 | 582 | return crypto_alloc_tfm(alg_name, &crypto_shash_type, type, mask); |
7b5a080b HX |
583 | } |
584 | EXPORT_SYMBOL_GPL(crypto_alloc_shash); | |
585 | ||
619a6ebd | 586 | static int shash_prepare_alg(struct shash_alg *alg) |
7b5a080b HX |
587 | { |
588 | struct crypto_alg *base = &alg->base; | |
589 | ||
590 | if (alg->digestsize > PAGE_SIZE / 8 || | |
99d27e1c HX |
591 | alg->descsize > PAGE_SIZE / 8 || |
592 | alg->statesize > PAGE_SIZE / 8) | |
7b5a080b HX |
593 | return -EINVAL; |
594 | ||
595 | base->cra_type = &crypto_shash_type; | |
596 | base->cra_flags &= ~CRYPTO_ALG_TYPE_MASK; | |
597 | base->cra_flags |= CRYPTO_ALG_TYPE_SHASH; | |
99d27e1c | 598 | |
8267adab HX |
599 | if (!alg->finup) |
600 | alg->finup = shash_finup_unaligned; | |
601 | if (!alg->digest) | |
602 | alg->digest = shash_digest_unaligned; | |
f592682f HX |
603 | if (!alg->export) { |
604 | alg->export = shash_default_export; | |
605 | alg->import = shash_default_import; | |
606 | alg->statesize = alg->descsize; | |
607 | } | |
57cfe44b HX |
608 | if (!alg->setkey) |
609 | alg->setkey = shash_no_setkey; | |
99d27e1c | 610 | |
619a6ebd HX |
611 | return 0; |
612 | } | |
613 | ||
614 | int crypto_register_shash(struct shash_alg *alg) | |
615 | { | |
616 | struct crypto_alg *base = &alg->base; | |
617 | int err; | |
618 | ||
619 | err = shash_prepare_alg(alg); | |
620 | if (err) | |
621 | return err; | |
7b5a080b HX |
622 | |
623 | return crypto_register_alg(base); | |
624 | } | |
625 | EXPORT_SYMBOL_GPL(crypto_register_shash); | |
626 | ||
627 | int crypto_unregister_shash(struct shash_alg *alg) | |
628 | { | |
629 | return crypto_unregister_alg(&alg->base); | |
630 | } | |
631 | EXPORT_SYMBOL_GPL(crypto_unregister_shash); | |
632 | ||
50fc3e8d JK |
633 | int crypto_register_shashes(struct shash_alg *algs, int count) |
634 | { | |
635 | int i, ret; | |
636 | ||
637 | for (i = 0; i < count; i++) { | |
638 | ret = crypto_register_shash(&algs[i]); | |
639 | if (ret) | |
640 | goto err; | |
641 | } | |
642 | ||
643 | return 0; | |
644 | ||
645 | err: | |
646 | for (--i; i >= 0; --i) | |
647 | crypto_unregister_shash(&algs[i]); | |
648 | ||
649 | return ret; | |
650 | } | |
651 | EXPORT_SYMBOL_GPL(crypto_register_shashes); | |
652 | ||
653 | int crypto_unregister_shashes(struct shash_alg *algs, int count) | |
654 | { | |
655 | int i, ret; | |
656 | ||
657 | for (i = count - 1; i >= 0; --i) { | |
658 | ret = crypto_unregister_shash(&algs[i]); | |
659 | if (ret) | |
660 | pr_err("Failed to unregister %s %s: %d\n", | |
661 | algs[i].base.cra_driver_name, | |
662 | algs[i].base.cra_name, ret); | |
663 | } | |
664 | ||
665 | return 0; | |
666 | } | |
667 | EXPORT_SYMBOL_GPL(crypto_unregister_shashes); | |
668 | ||
619a6ebd HX |
669 | int shash_register_instance(struct crypto_template *tmpl, |
670 | struct shash_instance *inst) | |
671 | { | |
672 | int err; | |
673 | ||
674 | err = shash_prepare_alg(&inst->alg); | |
675 | if (err) | |
676 | return err; | |
677 | ||
678 | return crypto_register_instance(tmpl, shash_crypto_instance(inst)); | |
679 | } | |
680 | EXPORT_SYMBOL_GPL(shash_register_instance); | |
681 | ||
2e4fddd8 HX |
682 | void shash_free_instance(struct crypto_instance *inst) |
683 | { | |
684 | crypto_drop_spawn(crypto_instance_ctx(inst)); | |
685 | kfree(shash_instance(inst)); | |
686 | } | |
687 | EXPORT_SYMBOL_GPL(shash_free_instance); | |
688 | ||
94296999 HX |
689 | int crypto_init_shash_spawn(struct crypto_shash_spawn *spawn, |
690 | struct shash_alg *alg, | |
691 | struct crypto_instance *inst) | |
692 | { | |
693 | return crypto_init_spawn2(&spawn->base, &alg->base, inst, | |
694 | &crypto_shash_type); | |
695 | } | |
696 | EXPORT_SYMBOL_GPL(crypto_init_shash_spawn); | |
697 | ||
7d6f5640 HX |
698 | struct shash_alg *shash_attr_alg(struct rtattr *rta, u32 type, u32 mask) |
699 | { | |
700 | struct crypto_alg *alg; | |
701 | ||
702 | alg = crypto_attr_alg2(rta, &crypto_shash_type, type, mask); | |
703 | return IS_ERR(alg) ? ERR_CAST(alg) : | |
704 | container_of(alg, struct shash_alg, base); | |
705 | } | |
706 | EXPORT_SYMBOL_GPL(shash_attr_alg); | |
707 | ||
7b5a080b HX |
708 | MODULE_LICENSE("GPL"); |
709 | MODULE_DESCRIPTION("Synchronous cryptographic hash type"); |