blob: 9100912716ae948fa57da13b9030a248f0460942 [file] [log] [blame]
Herbert Xu7b5a080b2008-08-31 15:47:27 +10001/*
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
Herbert Xu3b2f6df2008-08-31 18:52:18 +100013#include <crypto/scatterwalk.h>
Herbert Xu7b5a080b2008-08-31 15:47:27 +100014#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>
Steffen Klassertf4d663c2011-09-27 07:26:10 +020020#include <linux/cryptouser.h>
21#include <net/netlink.h>
Herbert Xu7b5a080b2008-08-31 15:47:27 +100022
Herbert Xu3b2f6df2008-08-31 18:52:18 +100023#include "internal.h"
24
Herbert Xu3f683d62009-02-18 16:56:59 +080025static const struct crypto_type crypto_shash_type;
26
Herbert Xu57cfe442009-07-11 22:17:39 +080027static int shash_no_setkey(struct crypto_shash *tfm, const u8 *key,
28 unsigned int keylen)
29{
30 return -ENOSYS;
31}
32
Herbert Xu7b5a080b2008-08-31 15:47:27 +100033static 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
Herbert Xu18eb8ea2010-05-19 11:50:58 +100042 absize = keylen + (alignmask & ~(crypto_tfm_ctx_alignment() - 1));
Herbert Xu7b5a080b2008-08-31 15:47:27 +100043 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);
Herbert Xu8c32c512009-07-14 21:35:36 +080050 kzfree(buffer);
Herbert Xu7b5a080b2008-08-31 15:47:27 +100051 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);
Herbert Xu0e2d3a12009-07-14 21:43:56 +080081 u8 ubuf[shash_align_buffer_size(unaligned_len, alignmask)]
Herbert Xu7b5a080b2008-08-31 15:47:27 +100082 __attribute__ ((aligned));
Herbert Xu0e2d3a12009-07-14 21:43:56 +080083 u8 *buf = PTR_ALIGN(&ubuf[0], alignmask + 1);
Herbert Xu8c32c512009-07-14 21:35:36 +080084 int err;
Herbert Xu7b5a080b2008-08-31 15:47:27 +100085
Yehuda Sadehf4f68992009-03-27 13:03:51 +080086 if (unaligned_len > len)
87 unaligned_len = len;
88
Herbert Xu7b5a080b2008-08-31 15:47:27 +100089 memcpy(buf, data, unaligned_len);
Herbert Xu8c32c512009-07-14 21:35:36 +080090 err = shash->update(desc, buf, unaligned_len);
91 memset(buf, 0, unaligned_len);
Herbert Xu7b5a080b2008-08-31 15:47:27 +100092
Herbert Xu8c32c512009-07-14 21:35:36 +080093 return err ?:
Herbert Xu7b5a080b2008-08-31 15:47:27 +100094 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);
Herbert Xu0e2d3a12009-07-14 21:43:56 +0800117 u8 ubuf[shash_align_buffer_size(ds, alignmask)]
Herbert Xu7b5a080b2008-08-31 15:47:27 +1000118 __attribute__ ((aligned));
Herbert Xu0e2d3a12009-07-14 21:43:56 +0800119 u8 *buf = PTR_ALIGN(&ubuf[0], alignmask + 1);
Herbert Xu7b5a080b2008-08-31 15:47:27 +1000120 int err;
121
122 err = shash->final(desc, buf);
Herbert Xu8c32c512009-07-14 21:35:36 +0800123 if (err)
124 goto out;
125
Herbert Xu7b5a080b2008-08-31 15:47:27 +1000126 memcpy(out, buf, ds);
Herbert Xu8c32c512009-07-14 21:35:36 +0800127
128out:
129 memset(buf, 0, ds);
Herbert Xu7b5a080b2008-08-31 15:47:27 +1000130 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
Herbert Xu8267ada2009-07-09 20:36:44 +0800160 if (((unsigned long)data | (unsigned long)out) & alignmask)
Herbert Xu7b5a080b2008-08-31 15:47:27 +1000161 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) ?:
Herbert Xuf88ad8d2009-07-08 23:32:08 +0800171 crypto_shash_finup(desc, data, len, out);
Herbert Xu7b5a080b2008-08-31 15:47:27 +1000172}
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
Herbert Xu8267ada2009-07-09 20:36:44 +0800181 if (((unsigned long)data | (unsigned long)out) & alignmask)
Herbert Xu7b5a080b2008-08-31 15:47:27 +1000182 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
Herbert Xuf5926822009-07-22 12:37:06 +0800188static int shash_default_export(struct shash_desc *desc, void *out)
Herbert Xudec8b782008-11-02 21:38:11 +0800189{
Herbert Xuf5926822009-07-22 12:37:06 +0800190 memcpy(out, shash_desc_ctx(desc), crypto_shash_descsize(desc->tfm));
191 return 0;
Herbert Xudec8b782008-11-02 21:38:11 +0800192}
Herbert Xu99d27e12009-07-09 20:30:57 +0800193
Herbert Xuf5926822009-07-22 12:37:06 +0800194static int shash_default_import(struct shash_desc *desc, const void *in)
Herbert Xu99d27e12009-07-09 20:30:57 +0800195{
Herbert Xuf5926822009-07-22 12:37:06 +0800196 memcpy(shash_desc_ctx(desc), in, crypto_shash_descsize(desc->tfm));
197 return 0;
Herbert Xu99d27e12009-07-09 20:30:57 +0800198}
Herbert Xudec8b782008-11-02 21:38:11 +0800199
Herbert Xu3b2f6df2008-08-31 18:52:18 +1000200static 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
Herbert Xu7eddf952009-07-12 21:25:20 +0800219int shash_ahash_update(struct ahash_request *req, struct shash_desc *desc)
Herbert Xu3b2f6df2008-08-31 18:52:18 +1000220{
Herbert Xu3b2f6df2008-08-31 18:52:18 +1000221 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}
Herbert Xu7eddf952009-07-12 21:25:20 +0800230EXPORT_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}
Herbert Xu3b2f6df2008-08-31 18:52:18 +1000236
237static int shash_async_final(struct ahash_request *req)
238{
239 return crypto_shash_final(ahash_request_ctx(req), req->result);
240}
241
Herbert Xu66f6ce52009-07-15 12:40:40 +0800242int shash_ahash_finup(struct ahash_request *req, struct shash_desc *desc)
243{
244 struct crypto_hash_walk walk;
245 int nbytes;
246
Herbert Xucbc86b92009-07-15 21:26:41 +0800247 nbytes = crypto_hash_walk_first(req, &walk);
248 if (!nbytes)
249 return crypto_shash_final(desc, req->result);
250
251 do {
Herbert Xu66f6ce52009-07-15 12:40:40 +0800252 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);
Herbert Xucbc86b92009-07-15 21:26:41 +0800256 nbytes = crypto_hash_walk_done(&walk, nbytes);
257 } while (nbytes > 0);
Herbert Xu66f6ce52009-07-15 12:40:40 +0800258
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
Herbert Xu7eddf952009-07-12 21:25:20 +0800274int shash_ahash_digest(struct ahash_request *req, struct shash_desc *desc)
Herbert Xu3b2f6df2008-08-31 18:52:18 +1000275{
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)) {
Herbert Xu3b2f6df2008-08-31 18:52:18 +1000282 void *data;
283
Herbert Xu3b2f6df2008-08-31 18:52:18 +1000284 data = crypto_kmap(sg_page(sg), 0);
285 err = crypto_shash_digest(desc, data + offset, nbytes,
286 req->result);
287 crypto_kunmap(data, 0);
288 crypto_yield(desc->flags);
Herbert Xu7eddf952009-07-12 21:25:20 +0800289 } else
290 err = crypto_shash_init(desc) ?:
Herbert Xu66f6ce52009-07-15 12:40:40 +0800291 shash_ahash_finup(req, desc);
Herbert Xu3b2f6df2008-08-31 18:52:18 +1000292
Herbert Xu3b2f6df2008-08-31 18:52:18 +1000293 return err;
294}
Herbert Xu7eddf952009-07-12 21:25:20 +0800295EXPORT_SYMBOL_GPL(shash_ahash_digest);
296
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);
301
302 desc->tfm = *ctx;
303 desc->flags = req->base.flags;
304
305 return shash_ahash_digest(req, desc);
306}
Herbert Xu3b2f6df2008-08-31 18:52:18 +1000307
Herbert Xu66f6ce52009-07-15 12:40:40 +0800308static 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{
Herbert Xu90246e72010-11-04 13:00:22 -0500315 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);
Herbert Xu66f6ce52009-07-15 12:40:40 +0800322}
323
Herbert Xu3b2f6df2008-08-31 18:52:18 +1000324static 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
Herbert Xu88056ec2009-07-14 12:28:26 +0800331int crypto_init_shash_ops_async(struct crypto_tfm *tfm)
Herbert Xu3b2f6df2008-08-31 18:52:18 +1000332{
333 struct crypto_alg *calg = tfm->__crt_alg;
Herbert Xu66f6ce52009-07-15 12:40:40 +0800334 struct shash_alg *alg = __crypto_shash_alg(calg);
Herbert Xu88056ec2009-07-14 12:28:26 +0800335 struct crypto_ahash *crt = __crypto_ahash_cast(tfm);
Herbert Xu3b2f6df2008-08-31 18:52:18 +1000336 struct crypto_shash **ctx = crypto_tfm_ctx(tfm);
337 struct crypto_shash *shash;
338
339 if (!crypto_mod_get(calg))
340 return -EAGAIN;
341
Herbert Xu3f683d62009-02-18 16:56:59 +0800342 shash = crypto_create_tfm(calg, &crypto_shash_type);
Herbert Xu3b2f6df2008-08-31 18:52:18 +1000343 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;
Herbert Xu66f6ce52009-07-15 12:40:40 +0800353 crt->final = shash_async_final;
354 crt->finup = shash_async_finup;
Herbert Xu3b2f6df2008-08-31 18:52:18 +1000355 crt->digest = shash_async_digest;
Herbert Xu66f6ce52009-07-15 12:40:40 +0800356
357 if (alg->setkey)
358 crt->setkey = shash_async_setkey;
359 if (alg->export)
360 crt->export = shash_async_export;
Steffen Klassert0044f3e2009-07-24 13:57:13 +0800361 if (alg->import)
Herbert Xu66f6ce52009-07-15 12:40:40 +0800362 crt->import = shash_async_import;
Herbert Xu3b2f6df2008-08-31 18:52:18 +1000363
Herbert Xu3b2f6df2008-08-31 18:52:18 +1000364 crt->reqsize = sizeof(struct shash_desc) + crypto_shash_descsize(shash);
365
366 return 0;
367}
368
Herbert Xu5f7082e2008-08-31 22:21:09 +1000369static int shash_compat_setkey(struct crypto_hash *tfm, const u8 *key,
370 unsigned int keylen)
371{
Herbert Xu113adef2009-07-14 12:50:12 +0800372 struct shash_desc **descp = crypto_hash_ctx(tfm);
373 struct shash_desc *desc = *descp;
Herbert Xu5f7082e2008-08-31 22:21:09 +1000374
375 return crypto_shash_setkey(desc->tfm, key, keylen);
376}
377
378static int shash_compat_init(struct hash_desc *hdesc)
379{
Herbert Xu113adef2009-07-14 12:50:12 +0800380 struct shash_desc **descp = crypto_hash_ctx(hdesc->tfm);
381 struct shash_desc *desc = *descp;
Herbert Xu5f7082e2008-08-31 22:21:09 +1000382
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{
Herbert Xu113adef2009-07-14 12:50:12 +0800391 struct shash_desc **descp = crypto_hash_ctx(hdesc->tfm);
392 struct shash_desc *desc = *descp;
Herbert Xu5f7082e2008-08-31 22:21:09 +1000393 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{
Herbert Xu113adef2009-07-14 12:50:12 +0800405 struct shash_desc **descp = crypto_hash_ctx(hdesc->tfm);
406
407 return crypto_shash_final(*descp, out);
Herbert Xu5f7082e2008-08-31 22:21:09 +1000408}
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)) {
Herbert Xu113adef2009-07-14 12:50:12 +0800417 struct shash_desc **descp = crypto_hash_ctx(hdesc->tfm);
418 struct shash_desc *desc = *descp;
Herbert Xu5f7082e2008-08-31 22:21:09 +1000419 void *data;
420
421 desc->flags = hdesc->flags;
422
423 data = crypto_kmap(sg_page(sg), 0);
424 err = crypto_shash_digest(desc, data + offset, nbytes, out);
425 crypto_kunmap(data, 0);
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{
Herbert Xu113adef2009-07-14 12:50:12 +0800446 struct shash_desc **descp = crypto_tfm_ctx(tfm);
447 struct shash_desc *desc = *descp;
Herbert Xu5f7082e2008-08-31 22:21:09 +1000448
449 crypto_free_shash(desc->tfm);
Herbert Xu113adef2009-07-14 12:50:12 +0800450 kzfree(desc);
Herbert Xu5f7082e2008-08-31 22:21:09 +1000451}
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);
Herbert Xu113adef2009-07-14 12:50:12 +0800458 struct shash_desc **descp = crypto_tfm_ctx(tfm);
Herbert Xu5f7082e2008-08-31 22:21:09 +1000459 struct crypto_shash *shash;
Herbert Xu113adef2009-07-14 12:50:12 +0800460 struct shash_desc *desc;
Herbert Xu5f7082e2008-08-31 22:21:09 +1000461
Adrian-Ken Rueegsegger4abfd732009-02-05 16:19:31 +1100462 if (!crypto_mod_get(calg))
463 return -EAGAIN;
464
Herbert Xu3f683d62009-02-18 16:56:59 +0800465 shash = crypto_create_tfm(calg, &crypto_shash_type);
Adrian-Ken Rueegsegger4abfd732009-02-05 16:19:31 +1100466 if (IS_ERR(shash)) {
467 crypto_mod_put(calg);
Herbert Xu5f7082e2008-08-31 22:21:09 +1000468 return PTR_ERR(shash);
Adrian-Ken Rueegsegger4abfd732009-02-05 16:19:31 +1100469 }
Herbert Xu5f7082e2008-08-31 22:21:09 +1000470
Herbert Xu113adef2009-07-14 12:50:12 +0800471 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;
Herbert Xu5f7082e2008-08-31 22:21:09 +1000479 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
Herbert Xu3b2f6df2008-08-31 18:52:18 +1000493static int crypto_init_shash_ops(struct crypto_tfm *tfm, u32 type, u32 mask)
494{
495 switch (mask & CRYPTO_ALG_TYPE_MASK) {
Herbert Xu5f7082e2008-08-31 22:21:09 +1000496 case CRYPTO_ALG_TYPE_HASH_MASK:
497 return crypto_init_shash_ops_compat(tfm);
Herbert Xu3b2f6df2008-08-31 18:52:18 +1000498 }
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) {
Herbert Xu5f7082e2008-08-31 22:21:09 +1000507 case CRYPTO_ALG_TYPE_HASH_MASK:
Herbert Xu113adef2009-07-14 12:50:12 +0800508 return sizeof(struct shash_desc *);
Herbert Xu3b2f6df2008-08-31 18:52:18 +1000509 }
510
511 return 0;
512}
513
Herbert Xu2ca33da2009-07-13 20:46:25 +0800514static int crypto_shash_init_tfm(struct crypto_tfm *tfm)
Herbert Xu7b5a080b2008-08-31 15:47:27 +1000515{
Herbert Xu113adef2009-07-14 12:50:12 +0800516 struct crypto_shash *hash = __crypto_shash_cast(tfm);
517
518 hash->descsize = crypto_shash_alg(hash)->descsize;
Herbert Xu7b5a080b2008-08-31 15:47:27 +1000519 return 0;
520}
521
Herbert Xu2ca33da2009-07-13 20:46:25 +0800522static unsigned int crypto_shash_extsize(struct crypto_alg *alg)
Herbert Xu7b5a080b2008-08-31 15:47:27 +1000523{
524 return alg->cra_ctxsize;
525}
526
Herbert Xu3acc8472011-11-03 23:46:07 +1100527#ifdef CONFIG_NET
Steffen Klassertf4d663c2011-09-27 07:26:10 +0200528static 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
537 NLA_PUT(skb, CRYPTOCFGA_REPORT_HASH,
538 sizeof(struct crypto_report_hash), &rhash);
539
540 return 0;
541
542nla_put_failure:
543 return -EMSGSIZE;
544}
Herbert Xu3acc8472011-11-03 23:46:07 +1100545#else
546static int crypto_shash_report(struct sk_buff *skb, struct crypto_alg *alg)
547{
548 return -ENOSYS;
549}
550#endif
Steffen Klassertf4d663c2011-09-27 07:26:10 +0200551
Herbert Xu7b5a080b2008-08-31 15:47:27 +1000552static 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);
Herbert Xu7b5a080b2008-08-31 15:47:27 +1000561}
562
563static const struct crypto_type crypto_shash_type = {
Herbert Xu3b2f6df2008-08-31 18:52:18 +1000564 .ctxsize = crypto_shash_ctxsize,
Herbert Xu7b5a080b2008-08-31 15:47:27 +1000565 .extsize = crypto_shash_extsize,
Herbert Xu3b2f6df2008-08-31 18:52:18 +1000566 .init = crypto_init_shash_ops,
Herbert Xu7b5a080b2008-08-31 15:47:27 +1000567 .init_tfm = crypto_shash_init_tfm,
568#ifdef CONFIG_PROC_FS
569 .show = crypto_shash_show,
570#endif
Steffen Klassertf4d663c2011-09-27 07:26:10 +0200571 .report = crypto_shash_report,
Herbert Xu7b5a080b2008-08-31 15:47:27 +1000572 .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{
Herbert Xu3f683d62009-02-18 16:56:59 +0800581 return crypto_alloc_tfm(alg_name, &crypto_shash_type, type, mask);
Herbert Xu7b5a080b2008-08-31 15:47:27 +1000582}
583EXPORT_SYMBOL_GPL(crypto_alloc_shash);
584
Herbert Xu619a6eb2009-07-08 18:46:23 +0800585static int shash_prepare_alg(struct shash_alg *alg)
Herbert Xu7b5a080b2008-08-31 15:47:27 +1000586{
587 struct crypto_alg *base = &alg->base;
588
589 if (alg->digestsize > PAGE_SIZE / 8 ||
Herbert Xu99d27e12009-07-09 20:30:57 +0800590 alg->descsize > PAGE_SIZE / 8 ||
591 alg->statesize > PAGE_SIZE / 8)
Herbert Xu7b5a080b2008-08-31 15:47:27 +1000592 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;
Herbert Xu99d27e12009-07-09 20:30:57 +0800597
Herbert Xu8267ada2009-07-09 20:36:44 +0800598 if (!alg->finup)
599 alg->finup = shash_finup_unaligned;
600 if (!alg->digest)
601 alg->digest = shash_digest_unaligned;
Herbert Xuf5926822009-07-22 12:37:06 +0800602 if (!alg->export) {
603 alg->export = shash_default_export;
604 alg->import = shash_default_import;
605 alg->statesize = alg->descsize;
606 }
Herbert Xu57cfe442009-07-11 22:17:39 +0800607 if (!alg->setkey)
608 alg->setkey = shash_no_setkey;
Herbert Xu99d27e12009-07-09 20:30:57 +0800609
Herbert Xu619a6eb2009-07-08 18:46:23 +0800610 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;
Herbert Xu7b5a080b2008-08-31 15:47:27 +1000621
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
Herbert Xu619a6eb2009-07-08 18:46:23 +0800632int shash_register_instance(struct crypto_template *tmpl,
633 struct shash_instance *inst)
634{
635 int err;
636
637 err = shash_prepare_alg(&inst->alg);
638 if (err)
639 return err;
640
641 return crypto_register_instance(tmpl, shash_crypto_instance(inst));
642}
643EXPORT_SYMBOL_GPL(shash_register_instance);
644
Herbert Xu2e4fddd2009-07-07 15:17:12 +0800645void shash_free_instance(struct crypto_instance *inst)
646{
647 crypto_drop_spawn(crypto_instance_ctx(inst));
648 kfree(shash_instance(inst));
649}
650EXPORT_SYMBOL_GPL(shash_free_instance);
651
Herbert Xu94296992009-07-08 17:21:37 +0800652int crypto_init_shash_spawn(struct crypto_shash_spawn *spawn,
653 struct shash_alg *alg,
654 struct crypto_instance *inst)
655{
656 return crypto_init_spawn2(&spawn->base, &alg->base, inst,
657 &crypto_shash_type);
658}
659EXPORT_SYMBOL_GPL(crypto_init_shash_spawn);
660
Herbert Xu7d6f5642009-07-08 17:56:28 +0800661struct shash_alg *shash_attr_alg(struct rtattr *rta, u32 type, u32 mask)
662{
663 struct crypto_alg *alg;
664
665 alg = crypto_attr_alg2(rta, &crypto_shash_type, type, mask);
666 return IS_ERR(alg) ? ERR_CAST(alg) :
667 container_of(alg, struct shash_alg, base);
668}
669EXPORT_SYMBOL_GPL(shash_attr_alg);
670
Herbert Xu7b5a080b2008-08-31 15:47:27 +1000671MODULE_LICENSE("GPL");
672MODULE_DESCRIPTION("Synchronous cryptographic hash type");