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Merge tag 'vfio-for-v3.8-v2' of git://github.com/awilliam/linux-vfio
[mirror_ubuntu-bionic-kernel.git] / crypto / shash.c
CommitLineData
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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>
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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>
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20#include <linux/cryptouser.h>
21#include <net/netlink.h>
7b5a080b 22
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23#include "internal.h"
24
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25static const struct crypto_type crypto_shash_type;
26
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27static int shash_no_setkey(struct crypto_shash *tfm, const u8 *key,
28 unsigned int keylen)
29{
30 return -ENOSYS;
31}
32
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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));
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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);
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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{
70 return len + (mask & ~(__alignof__(u8 __attribute__ ((aligned))) - 1));
71}
72
73static int shash_update_unaligned(struct shash_desc *desc, const u8 *data,
74 unsigned int len)
75{
76 struct crypto_shash *tfm = desc->tfm;
77 struct shash_alg *shash = crypto_shash_alg(tfm);
78 unsigned long alignmask = crypto_shash_alignmask(tfm);
79 unsigned int unaligned_len = alignmask + 1 -
80 ((unsigned long)data & alignmask);
0e2d3a12 81 u8 ubuf[shash_align_buffer_size(unaligned_len, alignmask)]
7b5a080b 82 __attribute__ ((aligned));
0e2d3a12 83 u8 *buf = PTR_ALIGN(&ubuf[0], alignmask + 1);
8c32c516 84 int err;
7b5a080b 85
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86 if (unaligned_len > len)
87 unaligned_len = len;
88
7b5a080b 89 memcpy(buf, data, unaligned_len);
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90 err = shash->update(desc, buf, unaligned_len);
91 memset(buf, 0, unaligned_len);
7b5a080b 92
8c32c516 93 return err ?:
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94 shash->update(desc, data + unaligned_len, len - unaligned_len);
95}
96
97int crypto_shash_update(struct shash_desc *desc, const u8 *data,
98 unsigned int len)
99{
100 struct crypto_shash *tfm = desc->tfm;
101 struct shash_alg *shash = crypto_shash_alg(tfm);
102 unsigned long alignmask = crypto_shash_alignmask(tfm);
103
104 if ((unsigned long)data & alignmask)
105 return shash_update_unaligned(desc, data, len);
106
107 return shash->update(desc, data, len);
108}
109EXPORT_SYMBOL_GPL(crypto_shash_update);
110
111static int shash_final_unaligned(struct shash_desc *desc, u8 *out)
112{
113 struct crypto_shash *tfm = desc->tfm;
114 unsigned long alignmask = crypto_shash_alignmask(tfm);
115 struct shash_alg *shash = crypto_shash_alg(tfm);
116 unsigned int ds = crypto_shash_digestsize(tfm);
0e2d3a12 117 u8 ubuf[shash_align_buffer_size(ds, alignmask)]
7b5a080b 118 __attribute__ ((aligned));
0e2d3a12 119 u8 *buf = PTR_ALIGN(&ubuf[0], alignmask + 1);
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120 int err;
121
122 err = shash->final(desc, buf);
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123 if (err)
124 goto out;
125
7b5a080b 126 memcpy(out, buf, ds);
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127
128out:
129 memset(buf, 0, ds);
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130 return err;
131}
132
133int crypto_shash_final(struct shash_desc *desc, u8 *out)
134{
135 struct crypto_shash *tfm = desc->tfm;
136 struct shash_alg *shash = crypto_shash_alg(tfm);
137 unsigned long alignmask = crypto_shash_alignmask(tfm);
138
139 if ((unsigned long)out & alignmask)
140 return shash_final_unaligned(desc, out);
141
142 return shash->final(desc, out);
143}
144EXPORT_SYMBOL_GPL(crypto_shash_final);
145
146static int shash_finup_unaligned(struct shash_desc *desc, const u8 *data,
147 unsigned int len, u8 *out)
148{
149 return crypto_shash_update(desc, data, len) ?:
150 crypto_shash_final(desc, out);
151}
152
153int crypto_shash_finup(struct shash_desc *desc, const u8 *data,
154 unsigned int len, u8 *out)
155{
156 struct crypto_shash *tfm = desc->tfm;
157 struct shash_alg *shash = crypto_shash_alg(tfm);
158 unsigned long alignmask = crypto_shash_alignmask(tfm);
159
8267adab 160 if (((unsigned long)data | (unsigned long)out) & alignmask)
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161 return shash_finup_unaligned(desc, data, len, out);
162
163 return shash->finup(desc, data, len, out);
164}
165EXPORT_SYMBOL_GPL(crypto_shash_finup);
166
167static int shash_digest_unaligned(struct shash_desc *desc, const u8 *data,
168 unsigned int len, u8 *out)
169{
170 return crypto_shash_init(desc) ?:
f88ad8de 171 crypto_shash_finup(desc, data, len, out);
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172}
173
174int crypto_shash_digest(struct shash_desc *desc, const u8 *data,
175 unsigned int len, u8 *out)
176{
177 struct crypto_shash *tfm = desc->tfm;
178 struct shash_alg *shash = crypto_shash_alg(tfm);
179 unsigned long alignmask = crypto_shash_alignmask(tfm);
180
8267adab 181 if (((unsigned long)data | (unsigned long)out) & alignmask)
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182 return shash_digest_unaligned(desc, data, len, out);
183
184 return shash->digest(desc, data, len, out);
185}
186EXPORT_SYMBOL_GPL(crypto_shash_digest);
187
f592682f 188static int shash_default_export(struct shash_desc *desc, void *out)
dec8b786 189{
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190 memcpy(out, shash_desc_ctx(desc), crypto_shash_descsize(desc->tfm));
191 return 0;
99d27e1c 192}
dec8b786 193
f592682f 194static int shash_default_import(struct shash_desc *desc, const void *in)
99d27e1c 195{
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196 memcpy(shash_desc_ctx(desc), in, crypto_shash_descsize(desc->tfm));
197 return 0;
dec8b786 198}
dec8b786 199
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200static int shash_async_setkey(struct crypto_ahash *tfm, const u8 *key,
201 unsigned int keylen)
202{
203 struct crypto_shash **ctx = crypto_ahash_ctx(tfm);
204
205 return crypto_shash_setkey(*ctx, key, keylen);
206}
207
208static int shash_async_init(struct ahash_request *req)
209{
210 struct crypto_shash **ctx = crypto_ahash_ctx(crypto_ahash_reqtfm(req));
211 struct shash_desc *desc = ahash_request_ctx(req);
212
213 desc->tfm = *ctx;
214 desc->flags = req->base.flags;
215
216 return crypto_shash_init(desc);
217}
218
7eddf95e 219int shash_ahash_update(struct ahash_request *req, struct shash_desc *desc)
3b2f6df0 220{
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221 struct crypto_hash_walk walk;
222 int nbytes;
223
224 for (nbytes = crypto_hash_walk_first(req, &walk); nbytes > 0;
225 nbytes = crypto_hash_walk_done(&walk, nbytes))
226 nbytes = crypto_shash_update(desc, walk.data, nbytes);
227
228 return nbytes;
229}
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230EXPORT_SYMBOL_GPL(shash_ahash_update);
231
232static int shash_async_update(struct ahash_request *req)
233{
234 return shash_ahash_update(req, ahash_request_ctx(req));
235}
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236
237static int shash_async_final(struct ahash_request *req)
238{
239 return crypto_shash_final(ahash_request_ctx(req), req->result);
240}
241
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242int shash_ahash_finup(struct ahash_request *req, struct shash_desc *desc)
243{
244 struct crypto_hash_walk walk;
245 int nbytes;
246
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247 nbytes = crypto_hash_walk_first(req, &walk);
248 if (!nbytes)
249 return crypto_shash_final(desc, req->result);
250
251 do {
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252 nbytes = crypto_hash_walk_last(&walk) ?
253 crypto_shash_finup(desc, walk.data, nbytes,
254 req->result) :
255 crypto_shash_update(desc, walk.data, nbytes);
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256 nbytes = crypto_hash_walk_done(&walk, nbytes);
257 } while (nbytes > 0);
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258
259 return nbytes;
260}
261EXPORT_SYMBOL_GPL(shash_ahash_finup);
262
263static int shash_async_finup(struct ahash_request *req)
264{
265 struct crypto_shash **ctx = crypto_ahash_ctx(crypto_ahash_reqtfm(req));
266 struct shash_desc *desc = ahash_request_ctx(req);
267
268 desc->tfm = *ctx;
269 desc->flags = req->base.flags;
270
271 return shash_ahash_finup(req, desc);
272}
273
7eddf95e 274int shash_ahash_digest(struct ahash_request *req, struct shash_desc *desc)
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275{
276 struct scatterlist *sg = req->src;
277 unsigned int offset = sg->offset;
278 unsigned int nbytes = req->nbytes;
279 int err;
280
281 if (nbytes < min(sg->length, ((unsigned int)(PAGE_SIZE)) - offset)) {
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282 void *data;
283
f0dfc0b0 284 data = kmap_atomic(sg_page(sg));
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285 err = crypto_shash_digest(desc, data + offset, nbytes,
286 req->result);
f0dfc0b0 287 kunmap_atomic(data);
3b2f6df0 288 crypto_yield(desc->flags);
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289 } else
290 err = crypto_shash_init(desc) ?:
66f6ce5e 291 shash_ahash_finup(req, desc);
3b2f6df0 292
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293 return err;
294}
295EXPORT_SYMBOL_GPL(shash_ahash_digest);
3b2f6df0 296
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297static int shash_async_digest(struct ahash_request *req)
298{
299 struct crypto_shash **ctx = crypto_ahash_ctx(crypto_ahash_reqtfm(req));
300 struct shash_desc *desc = ahash_request_ctx(req);
3b2f6df0 301
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302 desc->tfm = *ctx;
303 desc->flags = req->base.flags;
3b2f6df0 304
7eddf95e 305 return shash_ahash_digest(req, desc);
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306}
307
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308static int shash_async_export(struct ahash_request *req, void *out)
309{
310 return crypto_shash_export(ahash_request_ctx(req), out);
311}
312
313static int shash_async_import(struct ahash_request *req, const void *in)
314{
90246e79
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315 struct crypto_shash **ctx = crypto_ahash_ctx(crypto_ahash_reqtfm(req));
316 struct shash_desc *desc = ahash_request_ctx(req);
317
318 desc->tfm = *ctx;
319 desc->flags = req->base.flags;
320
321 return crypto_shash_import(desc, in);
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322}
323
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324static void crypto_exit_shash_ops_async(struct crypto_tfm *tfm)
325{
326 struct crypto_shash **ctx = crypto_tfm_ctx(tfm);
327
328 crypto_free_shash(*ctx);
329}
330
88056ec3 331int crypto_init_shash_ops_async(struct crypto_tfm *tfm)
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332{
333 struct crypto_alg *calg = tfm->__crt_alg;
66f6ce5e 334 struct shash_alg *alg = __crypto_shash_alg(calg);
88056ec3 335 struct crypto_ahash *crt = __crypto_ahash_cast(tfm);
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336 struct crypto_shash **ctx = crypto_tfm_ctx(tfm);
337 struct crypto_shash *shash;
338
339 if (!crypto_mod_get(calg))
340 return -EAGAIN;
341
3f683d61 342 shash = crypto_create_tfm(calg, &crypto_shash_type);
3b2f6df0
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343 if (IS_ERR(shash)) {
344 crypto_mod_put(calg);
345 return PTR_ERR(shash);
346 }
347
348 *ctx = shash;
349 tfm->exit = crypto_exit_shash_ops_async;
350
351 crt->init = shash_async_init;
352 crt->update = shash_async_update;
66f6ce5e
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353 crt->final = shash_async_final;
354 crt->finup = shash_async_finup;
3b2f6df0 355 crt->digest = shash_async_digest;
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356
357 if (alg->setkey)
358 crt->setkey = shash_async_setkey;
359 if (alg->export)
360 crt->export = shash_async_export;
0044f3ed 361 if (alg->import)
66f6ce5e 362 crt->import = shash_async_import;
3b2f6df0 363
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364 crt->reqsize = sizeof(struct shash_desc) + crypto_shash_descsize(shash);
365
366 return 0;
367}
368
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369static int shash_compat_setkey(struct crypto_hash *tfm, const u8 *key,
370 unsigned int keylen)
371{
113adefc
HX
372 struct shash_desc **descp = crypto_hash_ctx(tfm);
373 struct shash_desc *desc = *descp;
5f7082ed
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374
375 return crypto_shash_setkey(desc->tfm, key, keylen);
376}
377
378static int shash_compat_init(struct hash_desc *hdesc)
379{
113adefc
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380 struct shash_desc **descp = crypto_hash_ctx(hdesc->tfm);
381 struct shash_desc *desc = *descp;
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382
383 desc->flags = hdesc->flags;
384
385 return crypto_shash_init(desc);
386}
387
388static int shash_compat_update(struct hash_desc *hdesc, struct scatterlist *sg,
389 unsigned int len)
390{
113adefc
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391 struct shash_desc **descp = crypto_hash_ctx(hdesc->tfm);
392 struct shash_desc *desc = *descp;
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393 struct crypto_hash_walk walk;
394 int nbytes;
395
396 for (nbytes = crypto_hash_walk_first_compat(hdesc, &walk, sg, len);
397 nbytes > 0; nbytes = crypto_hash_walk_done(&walk, nbytes))
398 nbytes = crypto_shash_update(desc, walk.data, nbytes);
399
400 return nbytes;
401}
402
403static int shash_compat_final(struct hash_desc *hdesc, u8 *out)
404{
113adefc
HX
405 struct shash_desc **descp = crypto_hash_ctx(hdesc->tfm);
406
407 return crypto_shash_final(*descp, out);
5f7082ed
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408}
409
410static int shash_compat_digest(struct hash_desc *hdesc, struct scatterlist *sg,
411 unsigned int nbytes, u8 *out)
412{
413 unsigned int offset = sg->offset;
414 int err;
415
416 if (nbytes < min(sg->length, ((unsigned int)(PAGE_SIZE)) - offset)) {
113adefc
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417 struct shash_desc **descp = crypto_hash_ctx(hdesc->tfm);
418 struct shash_desc *desc = *descp;
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419 void *data;
420
421 desc->flags = hdesc->flags;
422
f0dfc0b0 423 data = kmap_atomic(sg_page(sg));
5f7082ed 424 err = crypto_shash_digest(desc, data + offset, nbytes, out);
f0dfc0b0 425 kunmap_atomic(data);
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426 crypto_yield(desc->flags);
427 goto out;
428 }
429
430 err = shash_compat_init(hdesc);
431 if (err)
432 goto out;
433
434 err = shash_compat_update(hdesc, sg, nbytes);
435 if (err)
436 goto out;
437
438 err = shash_compat_final(hdesc, out);
439
440out:
441 return err;
442}
443
444static void crypto_exit_shash_ops_compat(struct crypto_tfm *tfm)
445{
113adefc
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446 struct shash_desc **descp = crypto_tfm_ctx(tfm);
447 struct shash_desc *desc = *descp;
5f7082ed
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448
449 crypto_free_shash(desc->tfm);
113adefc 450 kzfree(desc);
5f7082ed
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451}
452
453static int crypto_init_shash_ops_compat(struct crypto_tfm *tfm)
454{
455 struct hash_tfm *crt = &tfm->crt_hash;
456 struct crypto_alg *calg = tfm->__crt_alg;
457 struct shash_alg *alg = __crypto_shash_alg(calg);
113adefc 458 struct shash_desc **descp = crypto_tfm_ctx(tfm);
5f7082ed 459 struct crypto_shash *shash;
113adefc 460 struct shash_desc *desc;
5f7082ed 461
4abfd73e
AKR
462 if (!crypto_mod_get(calg))
463 return -EAGAIN;
464
3f683d61 465 shash = crypto_create_tfm(calg, &crypto_shash_type);
4abfd73e
AKR
466 if (IS_ERR(shash)) {
467 crypto_mod_put(calg);
5f7082ed 468 return PTR_ERR(shash);
4abfd73e 469 }
5f7082ed 470
113adefc
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471 desc = kmalloc(sizeof(*desc) + crypto_shash_descsize(shash),
472 GFP_KERNEL);
473 if (!desc) {
474 crypto_free_shash(shash);
475 return -ENOMEM;
476 }
477
478 *descp = desc;
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479 desc->tfm = shash;
480 tfm->exit = crypto_exit_shash_ops_compat;
481
482 crt->init = shash_compat_init;
483 crt->update = shash_compat_update;
484 crt->final = shash_compat_final;
485 crt->digest = shash_compat_digest;
486 crt->setkey = shash_compat_setkey;
487
488 crt->digestsize = alg->digestsize;
489
490 return 0;
491}
492
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493static int crypto_init_shash_ops(struct crypto_tfm *tfm, u32 type, u32 mask)
494{
495 switch (mask & CRYPTO_ALG_TYPE_MASK) {
5f7082ed
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496 case CRYPTO_ALG_TYPE_HASH_MASK:
497 return crypto_init_shash_ops_compat(tfm);
3b2f6df0
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498 }
499
500 return -EINVAL;
501}
502
503static unsigned int crypto_shash_ctxsize(struct crypto_alg *alg, u32 type,
504 u32 mask)
505{
506 switch (mask & CRYPTO_ALG_TYPE_MASK) {
5f7082ed 507 case CRYPTO_ALG_TYPE_HASH_MASK:
113adefc 508 return sizeof(struct shash_desc *);
3b2f6df0
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509 }
510
511 return 0;
512}
513
2ca33da1 514static int crypto_shash_init_tfm(struct crypto_tfm *tfm)
7b5a080b 515{
113adefc
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516 struct crypto_shash *hash = __crypto_shash_cast(tfm);
517
518 hash->descsize = crypto_shash_alg(hash)->descsize;
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519 return 0;
520}
521
2ca33da1 522static unsigned int crypto_shash_extsize(struct crypto_alg *alg)
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523{
524 return alg->cra_ctxsize;
525}
526
3acc8473 527#ifdef CONFIG_NET
f4d663ce
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528static 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
533 snprintf(rhash.type, CRYPTO_MAX_ALG_NAME, "%s", "shash");
534 rhash.blocksize = alg->cra_blocksize;
535 rhash.digestsize = salg->digestsize;
536
6662df33
DM
537 if (nla_put(skb, CRYPTOCFGA_REPORT_HASH,
538 sizeof(struct crypto_report_hash), &rhash))
539 goto nla_put_failure;
f4d663ce
SK
540 return 0;
541
542nla_put_failure:
543 return -EMSGSIZE;
544}
3acc8473
HX
545#else
546static int crypto_shash_report(struct sk_buff *skb, struct crypto_alg *alg)
547{
548 return -ENOSYS;
549}
550#endif
f4d663ce 551
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552static void crypto_shash_show(struct seq_file *m, struct crypto_alg *alg)
553 __attribute__ ((unused));
554static void crypto_shash_show(struct seq_file *m, struct crypto_alg *alg)
555{
556 struct shash_alg *salg = __crypto_shash_alg(alg);
557
558 seq_printf(m, "type : shash\n");
559 seq_printf(m, "blocksize : %u\n", alg->cra_blocksize);
560 seq_printf(m, "digestsize : %u\n", salg->digestsize);
7b5a080b
HX
561}
562
563static const struct crypto_type crypto_shash_type = {
3b2f6df0 564 .ctxsize = crypto_shash_ctxsize,
7b5a080b 565 .extsize = crypto_shash_extsize,
3b2f6df0 566 .init = crypto_init_shash_ops,
7b5a080b
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567 .init_tfm = crypto_shash_init_tfm,
568#ifdef CONFIG_PROC_FS
569 .show = crypto_shash_show,
570#endif
f4d663ce 571 .report = crypto_shash_report,
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572 .maskclear = ~CRYPTO_ALG_TYPE_MASK,
573 .maskset = CRYPTO_ALG_TYPE_MASK,
574 .type = CRYPTO_ALG_TYPE_SHASH,
575 .tfmsize = offsetof(struct crypto_shash, base),
576};
577
578struct crypto_shash *crypto_alloc_shash(const char *alg_name, u32 type,
579 u32 mask)
580{
3f683d61 581 return crypto_alloc_tfm(alg_name, &crypto_shash_type, type, mask);
7b5a080b
HX
582}
583EXPORT_SYMBOL_GPL(crypto_alloc_shash);
584
619a6ebd 585static int shash_prepare_alg(struct shash_alg *alg)
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586{
587 struct crypto_alg *base = &alg->base;
588
589 if (alg->digestsize > PAGE_SIZE / 8 ||
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590 alg->descsize > PAGE_SIZE / 8 ||
591 alg->statesize > PAGE_SIZE / 8)
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592 return -EINVAL;
593
594 base->cra_type = &crypto_shash_type;
595 base->cra_flags &= ~CRYPTO_ALG_TYPE_MASK;
596 base->cra_flags |= CRYPTO_ALG_TYPE_SHASH;
99d27e1c 597
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598 if (!alg->finup)
599 alg->finup = shash_finup_unaligned;
600 if (!alg->digest)
601 alg->digest = shash_digest_unaligned;
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602 if (!alg->export) {
603 alg->export = shash_default_export;
604 alg->import = shash_default_import;
605 alg->statesize = alg->descsize;
606 }
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607 if (!alg->setkey)
608 alg->setkey = shash_no_setkey;
99d27e1c 609
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610 return 0;
611}
612
613int crypto_register_shash(struct shash_alg *alg)
614{
615 struct crypto_alg *base = &alg->base;
616 int err;
617
618 err = shash_prepare_alg(alg);
619 if (err)
620 return err;
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621
622 return crypto_register_alg(base);
623}
624EXPORT_SYMBOL_GPL(crypto_register_shash);
625
626int crypto_unregister_shash(struct shash_alg *alg)
627{
628 return crypto_unregister_alg(&alg->base);
629}
630EXPORT_SYMBOL_GPL(crypto_unregister_shash);
631
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632int crypto_register_shashes(struct shash_alg *algs, int count)
633{
634 int i, ret;
635
636 for (i = 0; i < count; i++) {
637 ret = crypto_register_shash(&algs[i]);
638 if (ret)
639 goto err;
640 }
641
642 return 0;
643
644err:
645 for (--i; i >= 0; --i)
646 crypto_unregister_shash(&algs[i]);
647
648 return ret;
649}
650EXPORT_SYMBOL_GPL(crypto_register_shashes);
651
652int crypto_unregister_shashes(struct shash_alg *algs, int count)
653{
654 int i, ret;
655
656 for (i = count - 1; i >= 0; --i) {
657 ret = crypto_unregister_shash(&algs[i]);
658 if (ret)
659 pr_err("Failed to unregister %s %s: %d\n",
660 algs[i].base.cra_driver_name,
661 algs[i].base.cra_name, ret);
662 }
663
664 return 0;
665}
666EXPORT_SYMBOL_GPL(crypto_unregister_shashes);
667
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668int shash_register_instance(struct crypto_template *tmpl,
669 struct shash_instance *inst)
670{
671 int err;
672
673 err = shash_prepare_alg(&inst->alg);
674 if (err)
675 return err;
676
677 return crypto_register_instance(tmpl, shash_crypto_instance(inst));
678}
679EXPORT_SYMBOL_GPL(shash_register_instance);
680
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681void shash_free_instance(struct crypto_instance *inst)
682{
683 crypto_drop_spawn(crypto_instance_ctx(inst));
684 kfree(shash_instance(inst));
685}
686EXPORT_SYMBOL_GPL(shash_free_instance);
687
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688int crypto_init_shash_spawn(struct crypto_shash_spawn *spawn,
689 struct shash_alg *alg,
690 struct crypto_instance *inst)
691{
692 return crypto_init_spawn2(&spawn->base, &alg->base, inst,
693 &crypto_shash_type);
694}
695EXPORT_SYMBOL_GPL(crypto_init_shash_spawn);
696
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697struct shash_alg *shash_attr_alg(struct rtattr *rta, u32 type, u32 mask)
698{
699 struct crypto_alg *alg;
700
701 alg = crypto_attr_alg2(rta, &crypto_shash_type, type, mask);
702 return IS_ERR(alg) ? ERR_CAST(alg) :
703 container_of(alg, struct shash_alg, base);
704}
705EXPORT_SYMBOL_GPL(shash_attr_alg);
706
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707MODULE_LICENSE("GPL");
708MODULE_DESCRIPTION("Synchronous cryptographic hash type");