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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{
Mark Charlebois66d8ea52012-11-20 21:18:16 +010070 typedef u8 __attribute__ ((aligned)) u8_aligned;
71 return len + (mask & ~(__alignof__(u8_aligned) - 1));
Herbert Xu7b5a080b2008-08-31 15:47:27 +100072}
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);
Herbert Xu0e2d3a12009-07-14 21:43:56 +080082 u8 ubuf[shash_align_buffer_size(unaligned_len, alignmask)]
Herbert Xu7b5a080b2008-08-31 15:47:27 +100083 __attribute__ ((aligned));
Herbert Xu0e2d3a12009-07-14 21:43:56 +080084 u8 *buf = PTR_ALIGN(&ubuf[0], alignmask + 1);
Herbert Xu8c32c512009-07-14 21:35:36 +080085 int err;
Herbert Xu7b5a080b2008-08-31 15:47:27 +100086
Yehuda Sadehf4f68992009-03-27 13:03:51 +080087 if (unaligned_len > len)
88 unaligned_len = len;
89
Herbert Xu7b5a080b2008-08-31 15:47:27 +100090 memcpy(buf, data, unaligned_len);
Herbert Xu8c32c512009-07-14 21:35:36 +080091 err = shash->update(desc, buf, unaligned_len);
92 memset(buf, 0, unaligned_len);
Herbert Xu7b5a080b2008-08-31 15:47:27 +100093
Herbert Xu8c32c512009-07-14 21:35:36 +080094 return err ?:
Herbert Xu7b5a080b2008-08-31 15:47:27 +100095 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);
Herbert Xu0e2d3a12009-07-14 21:43:56 +0800118 u8 ubuf[shash_align_buffer_size(ds, alignmask)]
Herbert Xu7b5a080b2008-08-31 15:47:27 +1000119 __attribute__ ((aligned));
Herbert Xu0e2d3a12009-07-14 21:43:56 +0800120 u8 *buf = PTR_ALIGN(&ubuf[0], alignmask + 1);
Herbert Xu7b5a080b2008-08-31 15:47:27 +1000121 int err;
122
123 err = shash->final(desc, buf);
Herbert Xu8c32c512009-07-14 21:35:36 +0800124 if (err)
125 goto out;
126
Herbert Xu7b5a080b2008-08-31 15:47:27 +1000127 memcpy(out, buf, ds);
Herbert Xu8c32c512009-07-14 21:35:36 +0800128
129out:
130 memset(buf, 0, ds);
Herbert Xu7b5a080b2008-08-31 15:47:27 +1000131 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
Herbert Xu8267ada2009-07-09 20:36:44 +0800161 if (((unsigned long)data | (unsigned long)out) & alignmask)
Herbert Xu7b5a080b2008-08-31 15:47:27 +1000162 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) ?:
Herbert Xuf88ad8d2009-07-08 23:32:08 +0800172 crypto_shash_finup(desc, data, len, out);
Herbert Xu7b5a080b2008-08-31 15:47:27 +1000173}
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
Herbert Xu8267ada2009-07-09 20:36:44 +0800182 if (((unsigned long)data | (unsigned long)out) & alignmask)
Herbert Xu7b5a080b2008-08-31 15:47:27 +1000183 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
Herbert Xuf5926822009-07-22 12:37:06 +0800189static int shash_default_export(struct shash_desc *desc, void *out)
Herbert Xudec8b782008-11-02 21:38:11 +0800190{
Herbert Xuf5926822009-07-22 12:37:06 +0800191 memcpy(out, shash_desc_ctx(desc), crypto_shash_descsize(desc->tfm));
192 return 0;
Herbert Xudec8b782008-11-02 21:38:11 +0800193}
Herbert Xu99d27e12009-07-09 20:30:57 +0800194
Herbert Xuf5926822009-07-22 12:37:06 +0800195static int shash_default_import(struct shash_desc *desc, const void *in)
Herbert Xu99d27e12009-07-09 20:30:57 +0800196{
Herbert Xuf5926822009-07-22 12:37:06 +0800197 memcpy(shash_desc_ctx(desc), in, crypto_shash_descsize(desc->tfm));
198 return 0;
Herbert Xu99d27e12009-07-09 20:30:57 +0800199}
Herbert Xudec8b782008-11-02 21:38:11 +0800200
Herbert Xu3b2f6df2008-08-31 18:52:18 +1000201static 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
Herbert Xu7eddf952009-07-12 21:25:20 +0800220int shash_ahash_update(struct ahash_request *req, struct shash_desc *desc)
Herbert Xu3b2f6df2008-08-31 18:52:18 +1000221{
Herbert Xu3b2f6df2008-08-31 18:52:18 +1000222 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}
Herbert Xu7eddf952009-07-12 21:25:20 +0800231EXPORT_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}
Herbert Xu3b2f6df2008-08-31 18:52:18 +1000237
238static int shash_async_final(struct ahash_request *req)
239{
240 return crypto_shash_final(ahash_request_ctx(req), req->result);
241}
242
Herbert Xu66f6ce52009-07-15 12:40:40 +0800243int shash_ahash_finup(struct ahash_request *req, struct shash_desc *desc)
244{
245 struct crypto_hash_walk walk;
246 int nbytes;
247
Herbert Xucbc86b92009-07-15 21:26:41 +0800248 nbytes = crypto_hash_walk_first(req, &walk);
249 if (!nbytes)
250 return crypto_shash_final(desc, req->result);
251
252 do {
Herbert Xu66f6ce52009-07-15 12:40:40 +0800253 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);
Herbert Xucbc86b92009-07-15 21:26:41 +0800257 nbytes = crypto_hash_walk_done(&walk, nbytes);
258 } while (nbytes > 0);
Herbert Xu66f6ce52009-07-15 12:40:40 +0800259
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
Herbert Xu7eddf952009-07-12 21:25:20 +0800275int shash_ahash_digest(struct ahash_request *req, struct shash_desc *desc)
Herbert Xu3b2f6df2008-08-31 18:52:18 +1000276{
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)) {
Herbert Xu3b2f6df2008-08-31 18:52:18 +1000283 void *data;
284
Cong Wangf0dfc0b2011-11-25 23:14:17 +0800285 data = kmap_atomic(sg_page(sg));
Herbert Xu3b2f6df2008-08-31 18:52:18 +1000286 err = crypto_shash_digest(desc, data + offset, nbytes,
287 req->result);
Cong Wangf0dfc0b2011-11-25 23:14:17 +0800288 kunmap_atomic(data);
Herbert Xu3b2f6df2008-08-31 18:52:18 +1000289 crypto_yield(desc->flags);
Herbert Xu7eddf952009-07-12 21:25:20 +0800290 } else
291 err = crypto_shash_init(desc) ?:
Herbert Xu66f6ce52009-07-15 12:40:40 +0800292 shash_ahash_finup(req, desc);
Herbert Xu3b2f6df2008-08-31 18:52:18 +1000293
Herbert Xu3b2f6df2008-08-31 18:52:18 +1000294 return err;
295}
Herbert Xu7eddf952009-07-12 21:25:20 +0800296EXPORT_SYMBOL_GPL(shash_ahash_digest);
297
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);
302
303 desc->tfm = *ctx;
304 desc->flags = req->base.flags;
305
306 return shash_ahash_digest(req, desc);
307}
Herbert Xu3b2f6df2008-08-31 18:52:18 +1000308
Herbert Xu66f6ce52009-07-15 12:40:40 +0800309static 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{
Herbert Xu90246e72010-11-04 13:00:22 -0500316 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);
Herbert Xu66f6ce52009-07-15 12:40:40 +0800323}
324
Herbert Xu3b2f6df2008-08-31 18:52:18 +1000325static 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
Herbert Xu88056ec2009-07-14 12:28:26 +0800332int crypto_init_shash_ops_async(struct crypto_tfm *tfm)
Herbert Xu3b2f6df2008-08-31 18:52:18 +1000333{
334 struct crypto_alg *calg = tfm->__crt_alg;
Herbert Xu66f6ce52009-07-15 12:40:40 +0800335 struct shash_alg *alg = __crypto_shash_alg(calg);
Herbert Xu88056ec2009-07-14 12:28:26 +0800336 struct crypto_ahash *crt = __crypto_ahash_cast(tfm);
Herbert Xu3b2f6df2008-08-31 18:52:18 +1000337 struct crypto_shash **ctx = crypto_tfm_ctx(tfm);
338 struct crypto_shash *shash;
339
340 if (!crypto_mod_get(calg))
341 return -EAGAIN;
342
Herbert Xu3f683d62009-02-18 16:56:59 +0800343 shash = crypto_create_tfm(calg, &crypto_shash_type);
Herbert Xu3b2f6df2008-08-31 18:52:18 +1000344 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;
Herbert Xu66f6ce52009-07-15 12:40:40 +0800354 crt->final = shash_async_final;
355 crt->finup = shash_async_finup;
Herbert Xu3b2f6df2008-08-31 18:52:18 +1000356 crt->digest = shash_async_digest;
Herbert Xu66f6ce52009-07-15 12:40:40 +0800357
358 if (alg->setkey)
359 crt->setkey = shash_async_setkey;
360 if (alg->export)
361 crt->export = shash_async_export;
Steffen Klassert0044f3e2009-07-24 13:57:13 +0800362 if (alg->import)
Herbert Xu66f6ce52009-07-15 12:40:40 +0800363 crt->import = shash_async_import;
Herbert Xu3b2f6df2008-08-31 18:52:18 +1000364
Herbert Xu3b2f6df2008-08-31 18:52:18 +1000365 crt->reqsize = sizeof(struct shash_desc) + crypto_shash_descsize(shash);
366
367 return 0;
368}
369
Herbert Xu5f7082e2008-08-31 22:21:09 +1000370static int shash_compat_setkey(struct crypto_hash *tfm, const u8 *key,
371 unsigned int keylen)
372{
Herbert Xu113adef2009-07-14 12:50:12 +0800373 struct shash_desc **descp = crypto_hash_ctx(tfm);
374 struct shash_desc *desc = *descp;
Herbert Xu5f7082e2008-08-31 22:21:09 +1000375
376 return crypto_shash_setkey(desc->tfm, key, keylen);
377}
378
379static int shash_compat_init(struct hash_desc *hdesc)
380{
Herbert Xu113adef2009-07-14 12:50:12 +0800381 struct shash_desc **descp = crypto_hash_ctx(hdesc->tfm);
382 struct shash_desc *desc = *descp;
Herbert Xu5f7082e2008-08-31 22:21:09 +1000383
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{
Herbert Xu113adef2009-07-14 12:50:12 +0800392 struct shash_desc **descp = crypto_hash_ctx(hdesc->tfm);
393 struct shash_desc *desc = *descp;
Herbert Xu5f7082e2008-08-31 22:21:09 +1000394 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{
Herbert Xu113adef2009-07-14 12:50:12 +0800406 struct shash_desc **descp = crypto_hash_ctx(hdesc->tfm);
407
408 return crypto_shash_final(*descp, out);
Herbert Xu5f7082e2008-08-31 22:21:09 +1000409}
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)) {
Herbert Xu113adef2009-07-14 12:50:12 +0800418 struct shash_desc **descp = crypto_hash_ctx(hdesc->tfm);
419 struct shash_desc *desc = *descp;
Herbert Xu5f7082e2008-08-31 22:21:09 +1000420 void *data;
421
422 desc->flags = hdesc->flags;
423
Cong Wangf0dfc0b2011-11-25 23:14:17 +0800424 data = kmap_atomic(sg_page(sg));
Herbert Xu5f7082e2008-08-31 22:21:09 +1000425 err = crypto_shash_digest(desc, data + offset, nbytes, out);
Cong Wangf0dfc0b2011-11-25 23:14:17 +0800426 kunmap_atomic(data);
Herbert Xu5f7082e2008-08-31 22:21:09 +1000427 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{
Herbert Xu113adef2009-07-14 12:50:12 +0800447 struct shash_desc **descp = crypto_tfm_ctx(tfm);
448 struct shash_desc *desc = *descp;
Herbert Xu5f7082e2008-08-31 22:21:09 +1000449
450 crypto_free_shash(desc->tfm);
Herbert Xu113adef2009-07-14 12:50:12 +0800451 kzfree(desc);
Herbert Xu5f7082e2008-08-31 22:21:09 +1000452}
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);
Herbert Xu113adef2009-07-14 12:50:12 +0800459 struct shash_desc **descp = crypto_tfm_ctx(tfm);
Herbert Xu5f7082e2008-08-31 22:21:09 +1000460 struct crypto_shash *shash;
Herbert Xu113adef2009-07-14 12:50:12 +0800461 struct shash_desc *desc;
Herbert Xu5f7082e2008-08-31 22:21:09 +1000462
Adrian-Ken Rueegsegger4abfd732009-02-05 16:19:31 +1100463 if (!crypto_mod_get(calg))
464 return -EAGAIN;
465
Herbert Xu3f683d62009-02-18 16:56:59 +0800466 shash = crypto_create_tfm(calg, &crypto_shash_type);
Adrian-Ken Rueegsegger4abfd732009-02-05 16:19:31 +1100467 if (IS_ERR(shash)) {
468 crypto_mod_put(calg);
Herbert Xu5f7082e2008-08-31 22:21:09 +1000469 return PTR_ERR(shash);
Adrian-Ken Rueegsegger4abfd732009-02-05 16:19:31 +1100470 }
Herbert Xu5f7082e2008-08-31 22:21:09 +1000471
Herbert Xu113adef2009-07-14 12:50:12 +0800472 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;
Herbert Xu5f7082e2008-08-31 22:21:09 +1000480 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
Herbert Xu3b2f6df2008-08-31 18:52:18 +1000494static int crypto_init_shash_ops(struct crypto_tfm *tfm, u32 type, u32 mask)
495{
496 switch (mask & CRYPTO_ALG_TYPE_MASK) {
Herbert Xu5f7082e2008-08-31 22:21:09 +1000497 case CRYPTO_ALG_TYPE_HASH_MASK:
498 return crypto_init_shash_ops_compat(tfm);
Herbert Xu3b2f6df2008-08-31 18:52:18 +1000499 }
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) {
Herbert Xu5f7082e2008-08-31 22:21:09 +1000508 case CRYPTO_ALG_TYPE_HASH_MASK:
Herbert Xu113adef2009-07-14 12:50:12 +0800509 return sizeof(struct shash_desc *);
Herbert Xu3b2f6df2008-08-31 18:52:18 +1000510 }
511
512 return 0;
513}
514
Herbert Xu2ca33da2009-07-13 20:46:25 +0800515static int crypto_shash_init_tfm(struct crypto_tfm *tfm)
Herbert Xu7b5a080b2008-08-31 15:47:27 +1000516{
Herbert Xu113adef2009-07-14 12:50:12 +0800517 struct crypto_shash *hash = __crypto_shash_cast(tfm);
518
519 hash->descsize = crypto_shash_alg(hash)->descsize;
Herbert Xu7b5a080b2008-08-31 15:47:27 +1000520 return 0;
521}
522
Herbert Xu3acc8472011-11-03 23:46:07 +1100523#ifdef CONFIG_NET
Steffen Klassertf4d663c2011-09-27 07:26:10 +0200524static 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
Mathias Krause9a5467b2013-02-05 18:19:13 +0100529 strncpy(rhash.type, "shash", sizeof(rhash.type));
530
Steffen Klassertf4d663c2011-09-27 07:26:10 +0200531 rhash.blocksize = alg->cra_blocksize;
532 rhash.digestsize = salg->digestsize;
533
David S. Miller6662df32012-04-01 20:19:05 -0400534 if (nla_put(skb, CRYPTOCFGA_REPORT_HASH,
535 sizeof(struct crypto_report_hash), &rhash))
536 goto nla_put_failure;
Steffen Klassertf4d663c2011-09-27 07:26:10 +0200537 return 0;
538
539nla_put_failure:
540 return -EMSGSIZE;
541}
Herbert Xu3acc8472011-11-03 23:46:07 +1100542#else
543static int crypto_shash_report(struct sk_buff *skb, struct crypto_alg *alg)
544{
545 return -ENOSYS;
546}
547#endif
Steffen Klassertf4d663c2011-09-27 07:26:10 +0200548
Herbert Xu7b5a080b2008-08-31 15:47:27 +1000549static 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);
Herbert Xu7b5a080b2008-08-31 15:47:27 +1000558}
559
560static const struct crypto_type crypto_shash_type = {
Herbert Xu3b2f6df2008-08-31 18:52:18 +1000561 .ctxsize = crypto_shash_ctxsize,
Herbert Xuac611682015-04-20 13:39:01 +0800562 .extsize = crypto_alg_extsize,
Herbert Xu3b2f6df2008-08-31 18:52:18 +1000563 .init = crypto_init_shash_ops,
Herbert Xu7b5a080b2008-08-31 15:47:27 +1000564 .init_tfm = crypto_shash_init_tfm,
565#ifdef CONFIG_PROC_FS
566 .show = crypto_shash_show,
567#endif
Steffen Klassertf4d663c2011-09-27 07:26:10 +0200568 .report = crypto_shash_report,
Herbert Xu7b5a080b2008-08-31 15:47:27 +1000569 .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{
Herbert Xu3f683d62009-02-18 16:56:59 +0800578 return crypto_alloc_tfm(alg_name, &crypto_shash_type, type, mask);
Herbert Xu7b5a080b2008-08-31 15:47:27 +1000579}
580EXPORT_SYMBOL_GPL(crypto_alloc_shash);
581
Herbert Xu619a6eb2009-07-08 18:46:23 +0800582static int shash_prepare_alg(struct shash_alg *alg)
Herbert Xu7b5a080b2008-08-31 15:47:27 +1000583{
584 struct crypto_alg *base = &alg->base;
585
586 if (alg->digestsize > PAGE_SIZE / 8 ||
Herbert Xu99d27e12009-07-09 20:30:57 +0800587 alg->descsize > PAGE_SIZE / 8 ||
588 alg->statesize > PAGE_SIZE / 8)
Herbert Xu7b5a080b2008-08-31 15:47:27 +1000589 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;
Herbert Xu99d27e12009-07-09 20:30:57 +0800594
Herbert Xu8267ada2009-07-09 20:36:44 +0800595 if (!alg->finup)
596 alg->finup = shash_finup_unaligned;
597 if (!alg->digest)
598 alg->digest = shash_digest_unaligned;
Herbert Xuf5926822009-07-22 12:37:06 +0800599 if (!alg->export) {
600 alg->export = shash_default_export;
601 alg->import = shash_default_import;
602 alg->statesize = alg->descsize;
603 }
Herbert Xu57cfe442009-07-11 22:17:39 +0800604 if (!alg->setkey)
605 alg->setkey = shash_no_setkey;
Herbert Xu99d27e12009-07-09 20:30:57 +0800606
Herbert Xu619a6eb2009-07-08 18:46:23 +0800607 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;
Herbert Xu7b5a080b2008-08-31 15:47:27 +1000618
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
Jussi Kivilinna50fc3e82012-07-11 14:20:20 +0300629int 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
Herbert Xu619a6eb2009-07-08 18:46:23 +0800665int 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
Herbert Xu2e4fddd2009-07-07 15:17:12 +0800678void 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
Herbert Xu94296992009-07-08 17:21:37 +0800685int 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
Herbert Xu7d6f5642009-07-08 17:56:28 +0800694struct 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
Herbert Xu7b5a080b2008-08-31 15:47:27 +1000704MODULE_LICENSE("GPL");
705MODULE_DESCRIPTION("Synchronous cryptographic hash type");