Commit | Line | Data |
---|---|---|
7b5a080b HX |
1 | /* |
2 | * Synchronous Cryptographic Hash operations. | |
3 | * | |
4 | * Copyright (c) 2008 Herbert Xu <herbert@gondor.apana.org.au> | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify it | |
7 | * under the terms of the GNU General Public License as published by the Free | |
8 | * Software Foundation; either version 2 of the License, or (at your option) | |
9 | * any later version. | |
10 | * | |
11 | */ | |
12 | ||
3b2f6df0 | 13 | #include <crypto/scatterwalk.h> |
7b5a080b HX |
14 | #include <crypto/internal/hash.h> |
15 | #include <linux/err.h> | |
16 | #include <linux/kernel.h> | |
17 | #include <linux/module.h> | |
18 | #include <linux/slab.h> | |
19 | #include <linux/seq_file.h> | |
f4d663ce SK |
20 | #include <linux/cryptouser.h> |
21 | #include <net/netlink.h> | |
d8c34b94 | 22 | #include <linux/compiler.h> |
7b5a080b | 23 | |
3b2f6df0 HX |
24 | #include "internal.h" |
25 | ||
3f683d61 HX |
26 | static const struct crypto_type crypto_shash_type; |
27 | ||
902ae89f EB |
28 | int shash_no_setkey(struct crypto_shash *tfm, const u8 *key, |
29 | unsigned int keylen) | |
57cfe44b HX |
30 | { |
31 | return -ENOSYS; | |
32 | } | |
902ae89f | 33 | EXPORT_SYMBOL_GPL(shash_no_setkey); |
57cfe44b | 34 | |
7b5a080b HX |
35 | static int shash_setkey_unaligned(struct crypto_shash *tfm, const u8 *key, |
36 | unsigned int keylen) | |
37 | { | |
38 | struct shash_alg *shash = crypto_shash_alg(tfm); | |
39 | unsigned long alignmask = crypto_shash_alignmask(tfm); | |
40 | unsigned long absize; | |
41 | u8 *buffer, *alignbuffer; | |
42 | int err; | |
43 | ||
18eb8ea6 | 44 | absize = keylen + (alignmask & ~(crypto_tfm_ctx_alignment() - 1)); |
9039f3ef | 45 | buffer = kmalloc(absize, GFP_ATOMIC); |
7b5a080b HX |
46 | if (!buffer) |
47 | return -ENOMEM; | |
48 | ||
49 | alignbuffer = (u8 *)ALIGN((unsigned long)buffer, alignmask + 1); | |
50 | memcpy(alignbuffer, key, keylen); | |
51 | err = shash->setkey(tfm, alignbuffer, keylen); | |
8c32c516 | 52 | kzfree(buffer); |
7b5a080b HX |
53 | return err; |
54 | } | |
55 | ||
3a48ec70 EB |
56 | static void shash_set_needkey(struct crypto_shash *tfm, struct shash_alg *alg) |
57 | { | |
58 | if (crypto_shash_alg_has_setkey(alg) && | |
59 | !(alg->base.cra_flags & CRYPTO_ALG_OPTIONAL_KEY)) | |
60 | crypto_shash_set_flags(tfm, CRYPTO_TFM_NEED_KEY); | |
61 | } | |
62 | ||
7b5a080b HX |
63 | int crypto_shash_setkey(struct crypto_shash *tfm, const u8 *key, |
64 | unsigned int keylen) | |
65 | { | |
66 | struct shash_alg *shash = crypto_shash_alg(tfm); | |
67 | unsigned long alignmask = crypto_shash_alignmask(tfm); | |
2f00eb27 | 68 | int err; |
7b5a080b HX |
69 | |
70 | if ((unsigned long)key & alignmask) | |
2f00eb27 EB |
71 | err = shash_setkey_unaligned(tfm, key, keylen); |
72 | else | |
73 | err = shash->setkey(tfm, key, keylen); | |
74 | ||
3a48ec70 EB |
75 | if (unlikely(err)) { |
76 | shash_set_needkey(tfm, shash); | |
2f00eb27 | 77 | return err; |
3a48ec70 | 78 | } |
7b5a080b | 79 | |
2f00eb27 EB |
80 | crypto_shash_clear_flags(tfm, CRYPTO_TFM_NEED_KEY); |
81 | return 0; | |
7b5a080b HX |
82 | } |
83 | EXPORT_SYMBOL_GPL(crypto_shash_setkey); | |
84 | ||
85 | static inline unsigned int shash_align_buffer_size(unsigned len, | |
86 | unsigned long mask) | |
87 | { | |
d8c34b94 | 88 | typedef u8 __aligned_largest u8_aligned; |
66d8ea57 | 89 | return len + (mask & ~(__alignof__(u8_aligned) - 1)); |
7b5a080b HX |
90 | } |
91 | ||
92 | static int shash_update_unaligned(struct shash_desc *desc, const u8 *data, | |
93 | unsigned int len) | |
94 | { | |
95 | struct crypto_shash *tfm = desc->tfm; | |
96 | struct shash_alg *shash = crypto_shash_alg(tfm); | |
97 | unsigned long alignmask = crypto_shash_alignmask(tfm); | |
98 | unsigned int unaligned_len = alignmask + 1 - | |
99 | ((unsigned long)data & alignmask); | |
0e2d3a12 | 100 | u8 ubuf[shash_align_buffer_size(unaligned_len, alignmask)] |
d8c34b94 | 101 | __aligned_largest; |
0e2d3a12 | 102 | u8 *buf = PTR_ALIGN(&ubuf[0], alignmask + 1); |
8c32c516 | 103 | int err; |
7b5a080b | 104 | |
f4f68993 YS |
105 | if (unaligned_len > len) |
106 | unaligned_len = len; | |
107 | ||
7b5a080b | 108 | memcpy(buf, data, unaligned_len); |
8c32c516 HX |
109 | err = shash->update(desc, buf, unaligned_len); |
110 | memset(buf, 0, unaligned_len); | |
7b5a080b | 111 | |
8c32c516 | 112 | return err ?: |
7b5a080b HX |
113 | shash->update(desc, data + unaligned_len, len - unaligned_len); |
114 | } | |
115 | ||
116 | int crypto_shash_update(struct shash_desc *desc, const u8 *data, | |
117 | unsigned int len) | |
118 | { | |
119 | struct crypto_shash *tfm = desc->tfm; | |
120 | struct shash_alg *shash = crypto_shash_alg(tfm); | |
121 | unsigned long alignmask = crypto_shash_alignmask(tfm); | |
122 | ||
123 | if ((unsigned long)data & alignmask) | |
124 | return shash_update_unaligned(desc, data, len); | |
125 | ||
126 | return shash->update(desc, data, len); | |
127 | } | |
128 | EXPORT_SYMBOL_GPL(crypto_shash_update); | |
129 | ||
130 | static int shash_final_unaligned(struct shash_desc *desc, u8 *out) | |
131 | { | |
132 | struct crypto_shash *tfm = desc->tfm; | |
133 | unsigned long alignmask = crypto_shash_alignmask(tfm); | |
134 | struct shash_alg *shash = crypto_shash_alg(tfm); | |
135 | unsigned int ds = crypto_shash_digestsize(tfm); | |
0e2d3a12 | 136 | u8 ubuf[shash_align_buffer_size(ds, alignmask)] |
d8c34b94 | 137 | __aligned_largest; |
0e2d3a12 | 138 | u8 *buf = PTR_ALIGN(&ubuf[0], alignmask + 1); |
7b5a080b HX |
139 | int err; |
140 | ||
141 | err = shash->final(desc, buf); | |
8c32c516 HX |
142 | if (err) |
143 | goto out; | |
144 | ||
7b5a080b | 145 | memcpy(out, buf, ds); |
8c32c516 HX |
146 | |
147 | out: | |
148 | memset(buf, 0, ds); | |
7b5a080b HX |
149 | return err; |
150 | } | |
151 | ||
152 | int crypto_shash_final(struct shash_desc *desc, 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 | ||
158 | if ((unsigned long)out & alignmask) | |
159 | return shash_final_unaligned(desc, out); | |
160 | ||
161 | return shash->final(desc, out); | |
162 | } | |
163 | EXPORT_SYMBOL_GPL(crypto_shash_final); | |
164 | ||
165 | static int shash_finup_unaligned(struct shash_desc *desc, const u8 *data, | |
166 | unsigned int len, u8 *out) | |
167 | { | |
168 | return crypto_shash_update(desc, data, len) ?: | |
169 | crypto_shash_final(desc, out); | |
170 | } | |
171 | ||
172 | int crypto_shash_finup(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_finup_unaligned(desc, data, len, out); |
181 | ||
182 | return shash->finup(desc, data, len, out); | |
183 | } | |
184 | EXPORT_SYMBOL_GPL(crypto_shash_finup); | |
185 | ||
186 | static int shash_digest_unaligned(struct shash_desc *desc, const u8 *data, | |
187 | unsigned int len, u8 *out) | |
188 | { | |
189 | return crypto_shash_init(desc) ?: | |
f88ad8de | 190 | crypto_shash_finup(desc, data, len, out); |
7b5a080b HX |
191 | } |
192 | ||
193 | int crypto_shash_digest(struct shash_desc *desc, const u8 *data, | |
194 | unsigned int len, u8 *out) | |
195 | { | |
196 | struct crypto_shash *tfm = desc->tfm; | |
197 | struct shash_alg *shash = crypto_shash_alg(tfm); | |
198 | unsigned long alignmask = crypto_shash_alignmask(tfm); | |
199 | ||
2f00eb27 EB |
200 | if (crypto_shash_get_flags(tfm) & CRYPTO_TFM_NEED_KEY) |
201 | return -ENOKEY; | |
202 | ||
8267adab | 203 | if (((unsigned long)data | (unsigned long)out) & alignmask) |
7b5a080b HX |
204 | return shash_digest_unaligned(desc, data, len, out); |
205 | ||
206 | return shash->digest(desc, data, len, out); | |
207 | } | |
208 | EXPORT_SYMBOL_GPL(crypto_shash_digest); | |
209 | ||
f592682f | 210 | static int shash_default_export(struct shash_desc *desc, void *out) |
dec8b786 | 211 | { |
f592682f HX |
212 | memcpy(out, shash_desc_ctx(desc), crypto_shash_descsize(desc->tfm)); |
213 | return 0; | |
99d27e1c | 214 | } |
dec8b786 | 215 | |
f592682f | 216 | static int shash_default_import(struct shash_desc *desc, const void *in) |
99d27e1c | 217 | { |
f592682f HX |
218 | memcpy(shash_desc_ctx(desc), in, crypto_shash_descsize(desc->tfm)); |
219 | return 0; | |
dec8b786 | 220 | } |
dec8b786 | 221 | |
3b2f6df0 HX |
222 | static int shash_async_setkey(struct crypto_ahash *tfm, const u8 *key, |
223 | unsigned int keylen) | |
224 | { | |
225 | struct crypto_shash **ctx = crypto_ahash_ctx(tfm); | |
226 | ||
227 | return crypto_shash_setkey(*ctx, key, keylen); | |
228 | } | |
229 | ||
230 | static int shash_async_init(struct ahash_request *req) | |
231 | { | |
232 | struct crypto_shash **ctx = crypto_ahash_ctx(crypto_ahash_reqtfm(req)); | |
233 | struct shash_desc *desc = ahash_request_ctx(req); | |
234 | ||
235 | desc->tfm = *ctx; | |
236 | desc->flags = req->base.flags; | |
237 | ||
238 | return crypto_shash_init(desc); | |
239 | } | |
240 | ||
7eddf95e | 241 | int shash_ahash_update(struct ahash_request *req, struct shash_desc *desc) |
3b2f6df0 | 242 | { |
3b2f6df0 HX |
243 | struct crypto_hash_walk walk; |
244 | int nbytes; | |
245 | ||
246 | for (nbytes = crypto_hash_walk_first(req, &walk); nbytes > 0; | |
247 | nbytes = crypto_hash_walk_done(&walk, nbytes)) | |
248 | nbytes = crypto_shash_update(desc, walk.data, nbytes); | |
249 | ||
250 | return nbytes; | |
251 | } | |
7eddf95e HX |
252 | EXPORT_SYMBOL_GPL(shash_ahash_update); |
253 | ||
254 | static int shash_async_update(struct ahash_request *req) | |
255 | { | |
256 | return shash_ahash_update(req, ahash_request_ctx(req)); | |
257 | } | |
3b2f6df0 HX |
258 | |
259 | static int shash_async_final(struct ahash_request *req) | |
260 | { | |
261 | return crypto_shash_final(ahash_request_ctx(req), req->result); | |
262 | } | |
263 | ||
66f6ce5e HX |
264 | int shash_ahash_finup(struct ahash_request *req, struct shash_desc *desc) |
265 | { | |
266 | struct crypto_hash_walk walk; | |
267 | int nbytes; | |
268 | ||
cbc86b91 HX |
269 | nbytes = crypto_hash_walk_first(req, &walk); |
270 | if (!nbytes) | |
271 | return crypto_shash_final(desc, req->result); | |
272 | ||
273 | do { | |
66f6ce5e HX |
274 | nbytes = crypto_hash_walk_last(&walk) ? |
275 | crypto_shash_finup(desc, walk.data, nbytes, | |
276 | req->result) : | |
277 | crypto_shash_update(desc, walk.data, nbytes); | |
cbc86b91 HX |
278 | nbytes = crypto_hash_walk_done(&walk, nbytes); |
279 | } while (nbytes > 0); | |
66f6ce5e HX |
280 | |
281 | return nbytes; | |
282 | } | |
283 | EXPORT_SYMBOL_GPL(shash_ahash_finup); | |
284 | ||
285 | static int shash_async_finup(struct ahash_request *req) | |
286 | { | |
287 | struct crypto_shash **ctx = crypto_ahash_ctx(crypto_ahash_reqtfm(req)); | |
288 | struct shash_desc *desc = ahash_request_ctx(req); | |
289 | ||
290 | desc->tfm = *ctx; | |
291 | desc->flags = req->base.flags; | |
292 | ||
293 | return shash_ahash_finup(req, desc); | |
294 | } | |
295 | ||
7eddf95e | 296 | int shash_ahash_digest(struct ahash_request *req, struct shash_desc *desc) |
3b2f6df0 | 297 | { |
3b2f6df0 | 298 | unsigned int nbytes = req->nbytes; |
b61907bb HX |
299 | struct scatterlist *sg; |
300 | unsigned int offset; | |
3b2f6df0 HX |
301 | int err; |
302 | ||
b61907bb HX |
303 | if (nbytes && |
304 | (sg = req->src, offset = sg->offset, | |
305 | nbytes < min(sg->length, ((unsigned int)(PAGE_SIZE)) - offset))) { | |
3b2f6df0 HX |
306 | void *data; |
307 | ||
f0dfc0b0 | 308 | data = kmap_atomic(sg_page(sg)); |
3b2f6df0 HX |
309 | err = crypto_shash_digest(desc, data + offset, nbytes, |
310 | req->result); | |
f0dfc0b0 | 311 | kunmap_atomic(data); |
3b2f6df0 | 312 | crypto_yield(desc->flags); |
7eddf95e HX |
313 | } else |
314 | err = crypto_shash_init(desc) ?: | |
66f6ce5e | 315 | shash_ahash_finup(req, desc); |
3b2f6df0 | 316 | |
7eddf95e HX |
317 | return err; |
318 | } | |
319 | EXPORT_SYMBOL_GPL(shash_ahash_digest); | |
3b2f6df0 | 320 | |
7eddf95e HX |
321 | static int shash_async_digest(struct ahash_request *req) |
322 | { | |
323 | struct crypto_shash **ctx = crypto_ahash_ctx(crypto_ahash_reqtfm(req)); | |
324 | struct shash_desc *desc = ahash_request_ctx(req); | |
3b2f6df0 | 325 | |
7eddf95e HX |
326 | desc->tfm = *ctx; |
327 | desc->flags = req->base.flags; | |
3b2f6df0 | 328 | |
7eddf95e | 329 | return shash_ahash_digest(req, desc); |
3b2f6df0 HX |
330 | } |
331 | ||
66f6ce5e HX |
332 | static int shash_async_export(struct ahash_request *req, void *out) |
333 | { | |
334 | return crypto_shash_export(ahash_request_ctx(req), out); | |
335 | } | |
336 | ||
337 | static int shash_async_import(struct ahash_request *req, const void *in) | |
338 | { | |
90246e79 HX |
339 | struct crypto_shash **ctx = crypto_ahash_ctx(crypto_ahash_reqtfm(req)); |
340 | struct shash_desc *desc = ahash_request_ctx(req); | |
341 | ||
342 | desc->tfm = *ctx; | |
343 | desc->flags = req->base.flags; | |
344 | ||
345 | return crypto_shash_import(desc, in); | |
66f6ce5e HX |
346 | } |
347 | ||
3b2f6df0 HX |
348 | static void crypto_exit_shash_ops_async(struct crypto_tfm *tfm) |
349 | { | |
350 | struct crypto_shash **ctx = crypto_tfm_ctx(tfm); | |
351 | ||
352 | crypto_free_shash(*ctx); | |
353 | } | |
354 | ||
88056ec3 | 355 | int crypto_init_shash_ops_async(struct crypto_tfm *tfm) |
3b2f6df0 HX |
356 | { |
357 | struct crypto_alg *calg = tfm->__crt_alg; | |
66f6ce5e | 358 | struct shash_alg *alg = __crypto_shash_alg(calg); |
88056ec3 | 359 | struct crypto_ahash *crt = __crypto_ahash_cast(tfm); |
3b2f6df0 HX |
360 | struct crypto_shash **ctx = crypto_tfm_ctx(tfm); |
361 | struct crypto_shash *shash; | |
362 | ||
363 | if (!crypto_mod_get(calg)) | |
364 | return -EAGAIN; | |
365 | ||
3f683d61 | 366 | shash = crypto_create_tfm(calg, &crypto_shash_type); |
3b2f6df0 HX |
367 | if (IS_ERR(shash)) { |
368 | crypto_mod_put(calg); | |
369 | return PTR_ERR(shash); | |
370 | } | |
371 | ||
372 | *ctx = shash; | |
373 | tfm->exit = crypto_exit_shash_ops_async; | |
374 | ||
375 | crt->init = shash_async_init; | |
376 | crt->update = shash_async_update; | |
66f6ce5e HX |
377 | crt->final = shash_async_final; |
378 | crt->finup = shash_async_finup; | |
3b2f6df0 | 379 | crt->digest = shash_async_digest; |
3a48ec70 EB |
380 | if (crypto_shash_alg_has_setkey(alg)) |
381 | crt->setkey = shash_async_setkey; | |
00420a65 | 382 | |
2f00eb27 EB |
383 | crypto_ahash_set_flags(crt, crypto_shash_get_flags(shash) & |
384 | CRYPTO_TFM_NEED_KEY); | |
66f6ce5e | 385 | |
66f6ce5e HX |
386 | if (alg->export) |
387 | crt->export = shash_async_export; | |
0044f3ed | 388 | if (alg->import) |
66f6ce5e | 389 | crt->import = shash_async_import; |
3b2f6df0 | 390 | |
3b2f6df0 HX |
391 | crt->reqsize = sizeof(struct shash_desc) + crypto_shash_descsize(shash); |
392 | ||
393 | return 0; | |
394 | } | |
395 | ||
2ca33da1 | 396 | static int crypto_shash_init_tfm(struct crypto_tfm *tfm) |
7b5a080b | 397 | { |
113adefc | 398 | struct crypto_shash *hash = __crypto_shash_cast(tfm); |
2f00eb27 EB |
399 | struct shash_alg *alg = crypto_shash_alg(hash); |
400 | ||
401 | hash->descsize = alg->descsize; | |
402 | ||
3a48ec70 | 403 | shash_set_needkey(hash, alg); |
113adefc | 404 | |
7b5a080b HX |
405 | return 0; |
406 | } | |
407 | ||
3acc8473 | 408 | #ifdef CONFIG_NET |
f4d663ce SK |
409 | static int crypto_shash_report(struct sk_buff *skb, struct crypto_alg *alg) |
410 | { | |
411 | struct crypto_report_hash rhash; | |
412 | struct shash_alg *salg = __crypto_shash_alg(alg); | |
413 | ||
9a5467bf MK |
414 | strncpy(rhash.type, "shash", sizeof(rhash.type)); |
415 | ||
f4d663ce SK |
416 | rhash.blocksize = alg->cra_blocksize; |
417 | rhash.digestsize = salg->digestsize; | |
418 | ||
6662df33 DM |
419 | if (nla_put(skb, CRYPTOCFGA_REPORT_HASH, |
420 | sizeof(struct crypto_report_hash), &rhash)) | |
421 | goto nla_put_failure; | |
f4d663ce SK |
422 | return 0; |
423 | ||
424 | nla_put_failure: | |
425 | return -EMSGSIZE; | |
426 | } | |
3acc8473 HX |
427 | #else |
428 | static int crypto_shash_report(struct sk_buff *skb, struct crypto_alg *alg) | |
429 | { | |
430 | return -ENOSYS; | |
431 | } | |
432 | #endif | |
f4d663ce | 433 | |
7b5a080b | 434 | static void crypto_shash_show(struct seq_file *m, struct crypto_alg *alg) |
d8c34b94 | 435 | __maybe_unused; |
7b5a080b HX |
436 | static void crypto_shash_show(struct seq_file *m, struct crypto_alg *alg) |
437 | { | |
438 | struct shash_alg *salg = __crypto_shash_alg(alg); | |
439 | ||
440 | seq_printf(m, "type : shash\n"); | |
441 | seq_printf(m, "blocksize : %u\n", alg->cra_blocksize); | |
442 | seq_printf(m, "digestsize : %u\n", salg->digestsize); | |
7b5a080b HX |
443 | } |
444 | ||
445 | static const struct crypto_type crypto_shash_type = { | |
ac611680 | 446 | .extsize = crypto_alg_extsize, |
7b5a080b HX |
447 | .init_tfm = crypto_shash_init_tfm, |
448 | #ifdef CONFIG_PROC_FS | |
449 | .show = crypto_shash_show, | |
450 | #endif | |
f4d663ce | 451 | .report = crypto_shash_report, |
7b5a080b HX |
452 | .maskclear = ~CRYPTO_ALG_TYPE_MASK, |
453 | .maskset = CRYPTO_ALG_TYPE_MASK, | |
454 | .type = CRYPTO_ALG_TYPE_SHASH, | |
455 | .tfmsize = offsetof(struct crypto_shash, base), | |
456 | }; | |
457 | ||
458 | struct crypto_shash *crypto_alloc_shash(const char *alg_name, u32 type, | |
459 | u32 mask) | |
460 | { | |
3f683d61 | 461 | return crypto_alloc_tfm(alg_name, &crypto_shash_type, type, mask); |
7b5a080b HX |
462 | } |
463 | EXPORT_SYMBOL_GPL(crypto_alloc_shash); | |
464 | ||
619a6ebd | 465 | static int shash_prepare_alg(struct shash_alg *alg) |
7b5a080b HX |
466 | { |
467 | struct crypto_alg *base = &alg->base; | |
468 | ||
469 | if (alg->digestsize > PAGE_SIZE / 8 || | |
99d27e1c HX |
470 | alg->descsize > PAGE_SIZE / 8 || |
471 | alg->statesize > PAGE_SIZE / 8) | |
7b5a080b HX |
472 | return -EINVAL; |
473 | ||
474 | base->cra_type = &crypto_shash_type; | |
475 | base->cra_flags &= ~CRYPTO_ALG_TYPE_MASK; | |
476 | base->cra_flags |= CRYPTO_ALG_TYPE_SHASH; | |
99d27e1c | 477 | |
8267adab HX |
478 | if (!alg->finup) |
479 | alg->finup = shash_finup_unaligned; | |
480 | if (!alg->digest) | |
481 | alg->digest = shash_digest_unaligned; | |
f592682f HX |
482 | if (!alg->export) { |
483 | alg->export = shash_default_export; | |
484 | alg->import = shash_default_import; | |
485 | alg->statesize = alg->descsize; | |
486 | } | |
57cfe44b HX |
487 | if (!alg->setkey) |
488 | alg->setkey = shash_no_setkey; | |
99d27e1c | 489 | |
619a6ebd HX |
490 | return 0; |
491 | } | |
492 | ||
493 | int crypto_register_shash(struct shash_alg *alg) | |
494 | { | |
495 | struct crypto_alg *base = &alg->base; | |
496 | int err; | |
497 | ||
498 | err = shash_prepare_alg(alg); | |
499 | if (err) | |
500 | return err; | |
7b5a080b HX |
501 | |
502 | return crypto_register_alg(base); | |
503 | } | |
504 | EXPORT_SYMBOL_GPL(crypto_register_shash); | |
505 | ||
506 | int crypto_unregister_shash(struct shash_alg *alg) | |
507 | { | |
508 | return crypto_unregister_alg(&alg->base); | |
509 | } | |
510 | EXPORT_SYMBOL_GPL(crypto_unregister_shash); | |
511 | ||
50fc3e8d JK |
512 | int crypto_register_shashes(struct shash_alg *algs, int count) |
513 | { | |
514 | int i, ret; | |
515 | ||
516 | for (i = 0; i < count; i++) { | |
517 | ret = crypto_register_shash(&algs[i]); | |
518 | if (ret) | |
519 | goto err; | |
520 | } | |
521 | ||
522 | return 0; | |
523 | ||
524 | err: | |
525 | for (--i; i >= 0; --i) | |
526 | crypto_unregister_shash(&algs[i]); | |
527 | ||
528 | return ret; | |
529 | } | |
530 | EXPORT_SYMBOL_GPL(crypto_register_shashes); | |
531 | ||
532 | int crypto_unregister_shashes(struct shash_alg *algs, int count) | |
533 | { | |
534 | int i, ret; | |
535 | ||
536 | for (i = count - 1; i >= 0; --i) { | |
537 | ret = crypto_unregister_shash(&algs[i]); | |
538 | if (ret) | |
539 | pr_err("Failed to unregister %s %s: %d\n", | |
540 | algs[i].base.cra_driver_name, | |
541 | algs[i].base.cra_name, ret); | |
542 | } | |
543 | ||
544 | return 0; | |
545 | } | |
546 | EXPORT_SYMBOL_GPL(crypto_unregister_shashes); | |
547 | ||
619a6ebd HX |
548 | int shash_register_instance(struct crypto_template *tmpl, |
549 | struct shash_instance *inst) | |
550 | { | |
551 | int err; | |
552 | ||
553 | err = shash_prepare_alg(&inst->alg); | |
554 | if (err) | |
555 | return err; | |
556 | ||
557 | return crypto_register_instance(tmpl, shash_crypto_instance(inst)); | |
558 | } | |
559 | EXPORT_SYMBOL_GPL(shash_register_instance); | |
560 | ||
2e4fddd8 HX |
561 | void shash_free_instance(struct crypto_instance *inst) |
562 | { | |
563 | crypto_drop_spawn(crypto_instance_ctx(inst)); | |
564 | kfree(shash_instance(inst)); | |
565 | } | |
566 | EXPORT_SYMBOL_GPL(shash_free_instance); | |
567 | ||
94296999 HX |
568 | int crypto_init_shash_spawn(struct crypto_shash_spawn *spawn, |
569 | struct shash_alg *alg, | |
570 | struct crypto_instance *inst) | |
571 | { | |
572 | return crypto_init_spawn2(&spawn->base, &alg->base, inst, | |
573 | &crypto_shash_type); | |
574 | } | |
575 | EXPORT_SYMBOL_GPL(crypto_init_shash_spawn); | |
576 | ||
7d6f5640 HX |
577 | struct shash_alg *shash_attr_alg(struct rtattr *rta, u32 type, u32 mask) |
578 | { | |
579 | struct crypto_alg *alg; | |
580 | ||
581 | alg = crypto_attr_alg2(rta, &crypto_shash_type, type, mask); | |
582 | return IS_ERR(alg) ? ERR_CAST(alg) : | |
583 | container_of(alg, struct shash_alg, base); | |
584 | } | |
585 | EXPORT_SYMBOL_GPL(shash_attr_alg); | |
586 | ||
7b5a080b HX |
587 | MODULE_LICENSE("GPL"); |
588 | MODULE_DESCRIPTION("Synchronous cryptographic hash type"); |