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