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Thomas Gleixner2874c5f2019-05-27 08:55:01 +02001// SPDX-License-Identifier: GPL-2.0-or-later
Herbert Xu7b5a080b2008-08-31 15:47:27 +10002/*
3 * Synchronous Cryptographic Hash operations.
4 *
5 * Copyright (c) 2008 Herbert Xu <herbert@gondor.apana.org.au>
Herbert Xu7b5a080b2008-08-31 15:47:27 +10006 */
7
Herbert Xu3b2f6df2008-08-31 18:52:18 +10008#include <crypto/scatterwalk.h>
Herbert Xu42808e52023-02-16 18:35:15 +08009#include <linux/cryptouser.h>
Herbert Xu7b5a080b2008-08-31 15:47:27 +100010#include <linux/err.h>
11#include <linux/kernel.h>
12#include <linux/module.h>
13#include <linux/slab.h>
14#include <linux/seq_file.h>
Herbert Xu42808e52023-02-16 18:35:15 +080015#include <linux/string.h>
Steffen Klassertf4d663c2011-09-27 07:26:10 +020016#include <net/netlink.h>
Herbert Xu7b5a080b2008-08-31 15:47:27 +100017
Herbert Xu42808e52023-02-16 18:35:15 +080018#include "hash.h"
Herbert Xu3b2f6df2008-08-31 18:52:18 +100019
Herbert Xu1c799572022-11-25 12:36:39 +080020#define MAX_SHASH_ALIGNMASK 63
21
Herbert Xu3f683d62009-02-18 16:56:59 +080022static const struct crypto_type crypto_shash_type;
23
Herbert Xu42808e52023-02-16 18:35:15 +080024static inline struct crypto_istat_hash *shash_get_stat(struct shash_alg *alg)
25{
26 return hash_get_stat(&alg->halg);
27}
28
29static inline int crypto_shash_errstat(struct shash_alg *alg, int err)
30{
31 return crypto_hash_errstat(&alg->halg, err);
32}
33
Eric Biggersc060e162022-11-18 11:44:21 -080034int shash_no_setkey(struct crypto_shash *tfm, const u8 *key,
35 unsigned int keylen)
Herbert Xu57cfe442009-07-11 22:17:39 +080036{
37 return -ENOSYS;
38}
Eric Biggersc060e162022-11-18 11:44:21 -080039EXPORT_SYMBOL_GPL(shash_no_setkey);
Herbert Xu57cfe442009-07-11 22:17:39 +080040
Herbert Xu7b5a080b2008-08-31 15:47:27 +100041static int shash_setkey_unaligned(struct crypto_shash *tfm, const u8 *key,
42 unsigned int keylen)
43{
44 struct shash_alg *shash = crypto_shash_alg(tfm);
45 unsigned long alignmask = crypto_shash_alignmask(tfm);
46 unsigned long absize;
47 u8 *buffer, *alignbuffer;
48 int err;
49
Herbert Xu18eb8ea2010-05-19 11:50:58 +100050 absize = keylen + (alignmask & ~(crypto_tfm_ctx_alignment() - 1));
Jia-Ju Bai9039f3e2017-10-03 10:25:22 +080051 buffer = kmalloc(absize, GFP_ATOMIC);
Herbert Xu7b5a080b2008-08-31 15:47:27 +100052 if (!buffer)
53 return -ENOMEM;
54
55 alignbuffer = (u8 *)ALIGN((unsigned long)buffer, alignmask + 1);
56 memcpy(alignbuffer, key, keylen);
57 err = shash->setkey(tfm, alignbuffer, keylen);
Waiman Long453431a2020-08-06 23:18:13 -070058 kfree_sensitive(buffer);
Herbert Xu7b5a080b2008-08-31 15:47:27 +100059 return err;
60}
61
Eric Biggersba7d7432019-01-06 18:47:42 -080062static void shash_set_needkey(struct crypto_shash *tfm, struct shash_alg *alg)
63{
Eric Biggersc2881782019-11-29 11:35:22 -080064 if (crypto_shash_alg_needs_key(alg))
Eric Biggersba7d7432019-01-06 18:47:42 -080065 crypto_shash_set_flags(tfm, CRYPTO_TFM_NEED_KEY);
66}
67
Herbert Xu7b5a080b2008-08-31 15:47:27 +100068int crypto_shash_setkey(struct crypto_shash *tfm, const u8 *key,
69 unsigned int keylen)
70{
71 struct shash_alg *shash = crypto_shash_alg(tfm);
72 unsigned long alignmask = crypto_shash_alignmask(tfm);
Eric Biggers9fa68f62018-01-03 11:16:27 -080073 int err;
Herbert Xu7b5a080b2008-08-31 15:47:27 +100074
75 if ((unsigned long)key & alignmask)
Eric Biggers9fa68f62018-01-03 11:16:27 -080076 err = shash_setkey_unaligned(tfm, key, keylen);
77 else
78 err = shash->setkey(tfm, key, keylen);
Herbert Xu7b5a080b2008-08-31 15:47:27 +100079
Eric Biggersba7d7432019-01-06 18:47:42 -080080 if (unlikely(err)) {
81 shash_set_needkey(tfm, shash);
Eric Biggers9fa68f62018-01-03 11:16:27 -080082 return err;
Eric Biggersba7d7432019-01-06 18:47:42 -080083 }
Eric Biggers9fa68f62018-01-03 11:16:27 -080084
85 crypto_shash_clear_flags(tfm, CRYPTO_TFM_NEED_KEY);
86 return 0;
Herbert Xu7b5a080b2008-08-31 15:47:27 +100087}
88EXPORT_SYMBOL_GPL(crypto_shash_setkey);
89
Herbert Xu7b5a080b2008-08-31 15:47:27 +100090static int shash_update_unaligned(struct shash_desc *desc, const u8 *data,
91 unsigned int len)
92{
93 struct crypto_shash *tfm = desc->tfm;
94 struct shash_alg *shash = crypto_shash_alg(tfm);
95 unsigned long alignmask = crypto_shash_alignmask(tfm);
96 unsigned int unaligned_len = alignmask + 1 -
97 ((unsigned long)data & alignmask);
Kees Cookf3569fd2018-08-07 14:18:42 -070098 /*
99 * We cannot count on __aligned() working for large values:
100 * https://patchwork.kernel.org/patch/9507697/
101 */
Herbert Xu1c799572022-11-25 12:36:39 +0800102 u8 ubuf[MAX_SHASH_ALIGNMASK * 2];
Herbert Xu0e2d3a12009-07-14 21:43:56 +0800103 u8 *buf = PTR_ALIGN(&ubuf[0], alignmask + 1);
Herbert Xu8c32c512009-07-14 21:35:36 +0800104 int err;
Herbert Xu7b5a080b2008-08-31 15:47:27 +1000105
Kees Cookf3569fd2018-08-07 14:18:42 -0700106 if (WARN_ON(buf + unaligned_len > ubuf + sizeof(ubuf)))
107 return -EINVAL;
108
Yehuda Sadehf4f68992009-03-27 13:03:51 +0800109 if (unaligned_len > len)
110 unaligned_len = len;
111
Herbert Xu7b5a080b2008-08-31 15:47:27 +1000112 memcpy(buf, data, unaligned_len);
Herbert Xu8c32c512009-07-14 21:35:36 +0800113 err = shash->update(desc, buf, unaligned_len);
114 memset(buf, 0, unaligned_len);
Herbert Xu7b5a080b2008-08-31 15:47:27 +1000115
Herbert Xu8c32c512009-07-14 21:35:36 +0800116 return err ?:
Herbert Xu7b5a080b2008-08-31 15:47:27 +1000117 shash->update(desc, data + unaligned_len, len - unaligned_len);
118}
119
120int crypto_shash_update(struct shash_desc *desc, const u8 *data,
121 unsigned int len)
122{
123 struct crypto_shash *tfm = desc->tfm;
124 struct shash_alg *shash = crypto_shash_alg(tfm);
125 unsigned long alignmask = crypto_shash_alignmask(tfm);
Herbert Xu42808e52023-02-16 18:35:15 +0800126 int err;
127
128 if (IS_ENABLED(CONFIG_CRYPTO_STATS))
129 atomic64_add(len, &shash_get_stat(shash)->hash_tlen);
Herbert Xu7b5a080b2008-08-31 15:47:27 +1000130
131 if ((unsigned long)data & alignmask)
Herbert Xu42808e52023-02-16 18:35:15 +0800132 err = shash_update_unaligned(desc, data, len);
133 else
134 err = shash->update(desc, data, len);
Herbert Xu7b5a080b2008-08-31 15:47:27 +1000135
Herbert Xu42808e52023-02-16 18:35:15 +0800136 return crypto_shash_errstat(shash, err);
Herbert Xu7b5a080b2008-08-31 15:47:27 +1000137}
138EXPORT_SYMBOL_GPL(crypto_shash_update);
139
140static int shash_final_unaligned(struct shash_desc *desc, u8 *out)
141{
142 struct crypto_shash *tfm = desc->tfm;
143 unsigned long alignmask = crypto_shash_alignmask(tfm);
144 struct shash_alg *shash = crypto_shash_alg(tfm);
145 unsigned int ds = crypto_shash_digestsize(tfm);
Kees Cookf3569fd2018-08-07 14:18:42 -0700146 /*
147 * We cannot count on __aligned() working for large values:
148 * https://patchwork.kernel.org/patch/9507697/
149 */
Herbert Xu1c799572022-11-25 12:36:39 +0800150 u8 ubuf[MAX_SHASH_ALIGNMASK + HASH_MAX_DIGESTSIZE];
Herbert Xu0e2d3a12009-07-14 21:43:56 +0800151 u8 *buf = PTR_ALIGN(&ubuf[0], alignmask + 1);
Herbert Xu7b5a080b2008-08-31 15:47:27 +1000152 int err;
153
Kees Cookf3569fd2018-08-07 14:18:42 -0700154 if (WARN_ON(buf + ds > ubuf + sizeof(ubuf)))
155 return -EINVAL;
156
Herbert Xu7b5a080b2008-08-31 15:47:27 +1000157 err = shash->final(desc, buf);
Herbert Xu8c32c512009-07-14 21:35:36 +0800158 if (err)
159 goto out;
160
Herbert Xu7b5a080b2008-08-31 15:47:27 +1000161 memcpy(out, buf, ds);
Herbert Xu8c32c512009-07-14 21:35:36 +0800162
163out:
164 memset(buf, 0, ds);
Herbert Xu7b5a080b2008-08-31 15:47:27 +1000165 return err;
166}
167
168int crypto_shash_final(struct shash_desc *desc, u8 *out)
169{
170 struct crypto_shash *tfm = desc->tfm;
171 struct shash_alg *shash = crypto_shash_alg(tfm);
172 unsigned long alignmask = crypto_shash_alignmask(tfm);
Herbert Xu42808e52023-02-16 18:35:15 +0800173 int err;
174
175 if (IS_ENABLED(CONFIG_CRYPTO_STATS))
176 atomic64_inc(&shash_get_stat(shash)->hash_cnt);
Herbert Xu7b5a080b2008-08-31 15:47:27 +1000177
178 if ((unsigned long)out & alignmask)
Herbert Xu42808e52023-02-16 18:35:15 +0800179 err = shash_final_unaligned(desc, out);
180 else
181 err = shash->final(desc, out);
Herbert Xu7b5a080b2008-08-31 15:47:27 +1000182
Herbert Xu42808e52023-02-16 18:35:15 +0800183 return crypto_shash_errstat(shash, err);
Herbert Xu7b5a080b2008-08-31 15:47:27 +1000184}
185EXPORT_SYMBOL_GPL(crypto_shash_final);
186
187static int shash_finup_unaligned(struct shash_desc *desc, const u8 *data,
188 unsigned int len, u8 *out)
189{
Herbert Xu42808e52023-02-16 18:35:15 +0800190 return shash_update_unaligned(desc, data, len) ?:
191 shash_final_unaligned(desc, out);
Herbert Xu7b5a080b2008-08-31 15:47:27 +1000192}
193
194int crypto_shash_finup(struct shash_desc *desc, const u8 *data,
195 unsigned int len, u8 *out)
196{
197 struct crypto_shash *tfm = desc->tfm;
198 struct shash_alg *shash = crypto_shash_alg(tfm);
199 unsigned long alignmask = crypto_shash_alignmask(tfm);
Herbert Xu42808e52023-02-16 18:35:15 +0800200 int err;
201
202 if (IS_ENABLED(CONFIG_CRYPTO_STATS)) {
203 struct crypto_istat_hash *istat = shash_get_stat(shash);
204
205 atomic64_inc(&istat->hash_cnt);
206 atomic64_add(len, &istat->hash_tlen);
207 }
Herbert Xu7b5a080b2008-08-31 15:47:27 +1000208
Herbert Xu8267ada2009-07-09 20:36:44 +0800209 if (((unsigned long)data | (unsigned long)out) & alignmask)
Herbert Xu42808e52023-02-16 18:35:15 +0800210 err = shash_finup_unaligned(desc, data, len, out);
211 else
212 err = shash->finup(desc, data, len, out);
Herbert Xu7b5a080b2008-08-31 15:47:27 +1000213
Herbert Xu42808e52023-02-16 18:35:15 +0800214
215 return crypto_shash_errstat(shash, err);
Herbert Xu7b5a080b2008-08-31 15:47:27 +1000216}
217EXPORT_SYMBOL_GPL(crypto_shash_finup);
218
219static int shash_digest_unaligned(struct shash_desc *desc, const u8 *data,
220 unsigned int len, u8 *out)
221{
222 return crypto_shash_init(desc) ?:
Herbert Xu42808e52023-02-16 18:35:15 +0800223 shash_update_unaligned(desc, data, len) ?:
224 shash_final_unaligned(desc, out);
Herbert Xu7b5a080b2008-08-31 15:47:27 +1000225}
226
227int crypto_shash_digest(struct shash_desc *desc, const u8 *data,
228 unsigned int len, u8 *out)
229{
230 struct crypto_shash *tfm = desc->tfm;
231 struct shash_alg *shash = crypto_shash_alg(tfm);
232 unsigned long alignmask = crypto_shash_alignmask(tfm);
Herbert Xu42808e52023-02-16 18:35:15 +0800233 int err;
234
235 if (IS_ENABLED(CONFIG_CRYPTO_STATS)) {
236 struct crypto_istat_hash *istat = shash_get_stat(shash);
237
238 atomic64_inc(&istat->hash_cnt);
239 atomic64_add(len, &istat->hash_tlen);
240 }
Herbert Xu7b5a080b2008-08-31 15:47:27 +1000241
Eric Biggers9fa68f62018-01-03 11:16:27 -0800242 if (crypto_shash_get_flags(tfm) & CRYPTO_TFM_NEED_KEY)
Herbert Xu42808e52023-02-16 18:35:15 +0800243 err = -ENOKEY;
244 else if (((unsigned long)data | (unsigned long)out) & alignmask)
245 err = shash_digest_unaligned(desc, data, len, out);
246 else
247 err = shash->digest(desc, data, len, out);
Eric Biggers9fa68f62018-01-03 11:16:27 -0800248
Herbert Xu42808e52023-02-16 18:35:15 +0800249 return crypto_shash_errstat(shash, err);
Herbert Xu7b5a080b2008-08-31 15:47:27 +1000250}
251EXPORT_SYMBOL_GPL(crypto_shash_digest);
252
Eric Biggers822a98b2020-05-01 22:31:03 -0700253int crypto_shash_tfm_digest(struct crypto_shash *tfm, const u8 *data,
254 unsigned int len, u8 *out)
255{
256 SHASH_DESC_ON_STACK(desc, tfm);
257 int err;
258
259 desc->tfm = tfm;
260
261 err = crypto_shash_digest(desc, data, len, out);
262
263 shash_desc_zero(desc);
264
265 return err;
266}
267EXPORT_SYMBOL_GPL(crypto_shash_tfm_digest);
268
Herbert Xuf5926822009-07-22 12:37:06 +0800269static int shash_default_export(struct shash_desc *desc, void *out)
Herbert Xudec8b782008-11-02 21:38:11 +0800270{
Herbert Xuf5926822009-07-22 12:37:06 +0800271 memcpy(out, shash_desc_ctx(desc), crypto_shash_descsize(desc->tfm));
272 return 0;
Herbert Xudec8b782008-11-02 21:38:11 +0800273}
Herbert Xu99d27e12009-07-09 20:30:57 +0800274
Herbert Xuf5926822009-07-22 12:37:06 +0800275static int shash_default_import(struct shash_desc *desc, const void *in)
Herbert Xu99d27e12009-07-09 20:30:57 +0800276{
Herbert Xuf5926822009-07-22 12:37:06 +0800277 memcpy(shash_desc_ctx(desc), in, crypto_shash_descsize(desc->tfm));
278 return 0;
Herbert Xu99d27e12009-07-09 20:30:57 +0800279}
Herbert Xudec8b782008-11-02 21:38:11 +0800280
Herbert Xu3b2f6df2008-08-31 18:52:18 +1000281static int shash_async_setkey(struct crypto_ahash *tfm, const u8 *key,
282 unsigned int keylen)
283{
284 struct crypto_shash **ctx = crypto_ahash_ctx(tfm);
285
286 return crypto_shash_setkey(*ctx, key, keylen);
287}
288
289static int shash_async_init(struct ahash_request *req)
290{
291 struct crypto_shash **ctx = crypto_ahash_ctx(crypto_ahash_reqtfm(req));
292 struct shash_desc *desc = ahash_request_ctx(req);
293
294 desc->tfm = *ctx;
Herbert Xu3b2f6df2008-08-31 18:52:18 +1000295
296 return crypto_shash_init(desc);
297}
298
Herbert Xu7eddf952009-07-12 21:25:20 +0800299int shash_ahash_update(struct ahash_request *req, struct shash_desc *desc)
Herbert Xu3b2f6df2008-08-31 18:52:18 +1000300{
Herbert Xu3b2f6df2008-08-31 18:52:18 +1000301 struct crypto_hash_walk walk;
302 int nbytes;
303
304 for (nbytes = crypto_hash_walk_first(req, &walk); nbytes > 0;
305 nbytes = crypto_hash_walk_done(&walk, nbytes))
306 nbytes = crypto_shash_update(desc, walk.data, nbytes);
307
308 return nbytes;
309}
Herbert Xu7eddf952009-07-12 21:25:20 +0800310EXPORT_SYMBOL_GPL(shash_ahash_update);
311
312static int shash_async_update(struct ahash_request *req)
313{
314 return shash_ahash_update(req, ahash_request_ctx(req));
315}
Herbert Xu3b2f6df2008-08-31 18:52:18 +1000316
317static int shash_async_final(struct ahash_request *req)
318{
319 return crypto_shash_final(ahash_request_ctx(req), req->result);
320}
321
Herbert Xu66f6ce52009-07-15 12:40:40 +0800322int shash_ahash_finup(struct ahash_request *req, struct shash_desc *desc)
323{
324 struct crypto_hash_walk walk;
325 int nbytes;
326
Herbert Xucbc86b92009-07-15 21:26:41 +0800327 nbytes = crypto_hash_walk_first(req, &walk);
328 if (!nbytes)
329 return crypto_shash_final(desc, req->result);
330
331 do {
Herbert Xu66f6ce52009-07-15 12:40:40 +0800332 nbytes = crypto_hash_walk_last(&walk) ?
333 crypto_shash_finup(desc, walk.data, nbytes,
334 req->result) :
335 crypto_shash_update(desc, walk.data, nbytes);
Herbert Xucbc86b92009-07-15 21:26:41 +0800336 nbytes = crypto_hash_walk_done(&walk, nbytes);
337 } while (nbytes > 0);
Herbert Xu66f6ce52009-07-15 12:40:40 +0800338
339 return nbytes;
340}
341EXPORT_SYMBOL_GPL(shash_ahash_finup);
342
343static int shash_async_finup(struct ahash_request *req)
344{
345 struct crypto_shash **ctx = crypto_ahash_ctx(crypto_ahash_reqtfm(req));
346 struct shash_desc *desc = ahash_request_ctx(req);
347
348 desc->tfm = *ctx;
Herbert Xu66f6ce52009-07-15 12:40:40 +0800349
350 return shash_ahash_finup(req, desc);
351}
352
Herbert Xu7eddf952009-07-12 21:25:20 +0800353int shash_ahash_digest(struct ahash_request *req, struct shash_desc *desc)
Herbert Xu3b2f6df2008-08-31 18:52:18 +1000354{
Herbert Xu3b2f6df2008-08-31 18:52:18 +1000355 unsigned int nbytes = req->nbytes;
Herbert Xub61907b2017-10-09 23:30:02 +0800356 struct scatterlist *sg;
357 unsigned int offset;
Herbert Xu3b2f6df2008-08-31 18:52:18 +1000358 int err;
359
Herbert Xub61907b2017-10-09 23:30:02 +0800360 if (nbytes &&
361 (sg = req->src, offset = sg->offset,
Eric Biggers67cb60e2019-04-14 16:23:33 -0700362 nbytes <= min(sg->length, ((unsigned int)(PAGE_SIZE)) - offset))) {
Herbert Xu3b2f6df2008-08-31 18:52:18 +1000363 void *data;
364
Ard Biesheuvelaa969512022-12-13 17:13:10 +0100365 data = kmap_local_page(sg_page(sg));
Herbert Xu3b2f6df2008-08-31 18:52:18 +1000366 err = crypto_shash_digest(desc, data + offset, nbytes,
367 req->result);
Ard Biesheuvelaa969512022-12-13 17:13:10 +0100368 kunmap_local(data);
Herbert Xu7eddf952009-07-12 21:25:20 +0800369 } else
370 err = crypto_shash_init(desc) ?:
Herbert Xu66f6ce52009-07-15 12:40:40 +0800371 shash_ahash_finup(req, desc);
Herbert Xu3b2f6df2008-08-31 18:52:18 +1000372
Herbert Xu3b2f6df2008-08-31 18:52:18 +1000373 return err;
374}
Herbert Xu7eddf952009-07-12 21:25:20 +0800375EXPORT_SYMBOL_GPL(shash_ahash_digest);
376
377static int shash_async_digest(struct ahash_request *req)
378{
379 struct crypto_shash **ctx = crypto_ahash_ctx(crypto_ahash_reqtfm(req));
380 struct shash_desc *desc = ahash_request_ctx(req);
381
382 desc->tfm = *ctx;
Herbert Xu7eddf952009-07-12 21:25:20 +0800383
384 return shash_ahash_digest(req, desc);
385}
Herbert Xu3b2f6df2008-08-31 18:52:18 +1000386
Herbert Xu66f6ce52009-07-15 12:40:40 +0800387static int shash_async_export(struct ahash_request *req, void *out)
388{
389 return crypto_shash_export(ahash_request_ctx(req), out);
390}
391
392static int shash_async_import(struct ahash_request *req, const void *in)
393{
Herbert Xu90246e72010-11-04 13:00:22 -0500394 struct crypto_shash **ctx = crypto_ahash_ctx(crypto_ahash_reqtfm(req));
395 struct shash_desc *desc = ahash_request_ctx(req);
396
397 desc->tfm = *ctx;
Herbert Xu90246e72010-11-04 13:00:22 -0500398
399 return crypto_shash_import(desc, in);
Herbert Xu66f6ce52009-07-15 12:40:40 +0800400}
401
Herbert Xu3b2f6df2008-08-31 18:52:18 +1000402static void crypto_exit_shash_ops_async(struct crypto_tfm *tfm)
403{
404 struct crypto_shash **ctx = crypto_tfm_ctx(tfm);
405
406 crypto_free_shash(*ctx);
407}
408
Herbert Xu88056ec2009-07-14 12:28:26 +0800409int crypto_init_shash_ops_async(struct crypto_tfm *tfm)
Herbert Xu3b2f6df2008-08-31 18:52:18 +1000410{
411 struct crypto_alg *calg = tfm->__crt_alg;
Herbert Xu66f6ce52009-07-15 12:40:40 +0800412 struct shash_alg *alg = __crypto_shash_alg(calg);
Herbert Xu88056ec2009-07-14 12:28:26 +0800413 struct crypto_ahash *crt = __crypto_ahash_cast(tfm);
Herbert Xu3b2f6df2008-08-31 18:52:18 +1000414 struct crypto_shash **ctx = crypto_tfm_ctx(tfm);
415 struct crypto_shash *shash;
416
417 if (!crypto_mod_get(calg))
418 return -EAGAIN;
419
Herbert Xu3f683d62009-02-18 16:56:59 +0800420 shash = crypto_create_tfm(calg, &crypto_shash_type);
Herbert Xu3b2f6df2008-08-31 18:52:18 +1000421 if (IS_ERR(shash)) {
422 crypto_mod_put(calg);
423 return PTR_ERR(shash);
424 }
425
426 *ctx = shash;
427 tfm->exit = crypto_exit_shash_ops_async;
428
429 crt->init = shash_async_init;
430 crt->update = shash_async_update;
Herbert Xu66f6ce52009-07-15 12:40:40 +0800431 crt->final = shash_async_final;
432 crt->finup = shash_async_finup;
Herbert Xu3b2f6df2008-08-31 18:52:18 +1000433 crt->digest = shash_async_digest;
Eric Biggersba7d7432019-01-06 18:47:42 -0800434 if (crypto_shash_alg_has_setkey(alg))
435 crt->setkey = shash_async_setkey;
Herbert Xu66f6ce52009-07-15 12:40:40 +0800436
Eric Biggers9fa68f62018-01-03 11:16:27 -0800437 crypto_ahash_set_flags(crt, crypto_shash_get_flags(shash) &
438 CRYPTO_TFM_NEED_KEY);
Herbert Xu00420a62016-01-27 00:16:37 +0800439
Eric Biggers2b091e32019-01-06 19:08:01 -0800440 crt->export = shash_async_export;
441 crt->import = shash_async_import;
Herbert Xu3b2f6df2008-08-31 18:52:18 +1000442
Herbert Xu3b2f6df2008-08-31 18:52:18 +1000443 crt->reqsize = sizeof(struct shash_desc) + crypto_shash_descsize(shash);
444
445 return 0;
446}
447
Herbert Xued3630b2023-04-13 14:24:19 +0800448struct crypto_ahash *crypto_clone_shash_ops_async(struct crypto_ahash *nhash,
449 struct crypto_ahash *hash)
450{
451 struct crypto_shash **nctx = crypto_ahash_ctx(nhash);
452 struct crypto_shash **ctx = crypto_ahash_ctx(hash);
453 struct crypto_shash *shash;
454
455 shash = crypto_clone_shash(*ctx);
456 if (IS_ERR(shash)) {
457 crypto_free_ahash(nhash);
458 return ERR_CAST(shash);
459 }
460
461 *nctx = shash;
462
463 return nhash;
464}
465
Herbert Xufbce6be2019-12-08 13:42:51 +0800466static void crypto_shash_exit_tfm(struct crypto_tfm *tfm)
Herbert Xu7b5a080b2008-08-31 15:47:27 +1000467{
Herbert Xu113adef2009-07-14 12:50:12 +0800468 struct crypto_shash *hash = __crypto_shash_cast(tfm);
Eric Biggers9fa68f62018-01-03 11:16:27 -0800469 struct shash_alg *alg = crypto_shash_alg(hash);
Herbert Xu113adef2009-07-14 12:50:12 +0800470
Herbert Xufbce6be2019-12-08 13:42:51 +0800471 alg->exit_tfm(hash);
472}
473
474static int crypto_shash_init_tfm(struct crypto_tfm *tfm)
475{
476 struct crypto_shash *hash = __crypto_shash_cast(tfm);
477 struct shash_alg *alg = crypto_shash_alg(hash);
478 int err;
479
Eric Biggers9fa68f62018-01-03 11:16:27 -0800480 hash->descsize = alg->descsize;
481
Eric Biggersba7d7432019-01-06 18:47:42 -0800482 shash_set_needkey(hash, alg);
Eric Biggers9fa68f62018-01-03 11:16:27 -0800483
Herbert Xufbce6be2019-12-08 13:42:51 +0800484 if (alg->exit_tfm)
485 tfm->exit = crypto_shash_exit_tfm;
486
487 if (!alg->init_tfm)
488 return 0;
489
490 err = alg->init_tfm(hash);
491 if (err)
492 return err;
493
494 /* ->init_tfm() may have increased the descsize. */
495 if (WARN_ON_ONCE(hash->descsize > HASH_MAX_DESCSIZE)) {
496 if (alg->exit_tfm)
497 alg->exit_tfm(hash);
498 return -EINVAL;
499 }
500
Herbert Xu7b5a080b2008-08-31 15:47:27 +1000501 return 0;
502}
503
Eric Biggers48fb3e52020-01-02 20:04:35 -0800504static void crypto_shash_free_instance(struct crypto_instance *inst)
505{
506 struct shash_instance *shash = shash_instance(inst);
507
Eric Biggers48fb3e52020-01-02 20:04:35 -0800508 shash->free(shash);
509}
510
Herbert Xuc0f9e012023-02-16 18:35:28 +0800511static int __maybe_unused crypto_shash_report(
512 struct sk_buff *skb, struct crypto_alg *alg)
Steffen Klassertf4d663c2011-09-27 07:26:10 +0200513{
514 struct crypto_report_hash rhash;
515 struct shash_alg *salg = __crypto_shash_alg(alg);
516
Eric Biggers37db69e2018-11-03 14:56:03 -0700517 memset(&rhash, 0, sizeof(rhash));
518
519 strscpy(rhash.type, "shash", sizeof(rhash.type));
Mathias Krause9a5467bf2013-02-05 18:19:13 +0100520
Steffen Klassertf4d663c2011-09-27 07:26:10 +0200521 rhash.blocksize = alg->cra_blocksize;
522 rhash.digestsize = salg->digestsize;
523
Eric Biggers37db69e2018-11-03 14:56:03 -0700524 return nla_put(skb, CRYPTOCFGA_REPORT_HASH, sizeof(rhash), &rhash);
Steffen Klassertf4d663c2011-09-27 07:26:10 +0200525}
526
Herbert Xu7b5a080b2008-08-31 15:47:27 +1000527static void crypto_shash_show(struct seq_file *m, struct crypto_alg *alg)
Gideon Israel Dsouzad8c34b92016-12-31 21:26:23 +0530528 __maybe_unused;
Herbert Xu7b5a080b2008-08-31 15:47:27 +1000529static void crypto_shash_show(struct seq_file *m, struct crypto_alg *alg)
530{
531 struct shash_alg *salg = __crypto_shash_alg(alg);
532
533 seq_printf(m, "type : shash\n");
534 seq_printf(m, "blocksize : %u\n", alg->cra_blocksize);
535 seq_printf(m, "digestsize : %u\n", salg->digestsize);
Herbert Xu7b5a080b2008-08-31 15:47:27 +1000536}
537
Herbert Xu42808e52023-02-16 18:35:15 +0800538static int __maybe_unused crypto_shash_report_stat(
539 struct sk_buff *skb, struct crypto_alg *alg)
540{
541 return crypto_hash_report_stat(skb, alg, "shash");
542}
543
Herbert Xu7b5a080b2008-08-31 15:47:27 +1000544static const struct crypto_type crypto_shash_type = {
Herbert Xuac611682015-04-20 13:39:01 +0800545 .extsize = crypto_alg_extsize,
Herbert Xu7b5a080b2008-08-31 15:47:27 +1000546 .init_tfm = crypto_shash_init_tfm,
Eric Biggers48fb3e52020-01-02 20:04:35 -0800547 .free = crypto_shash_free_instance,
Herbert Xu7b5a080b2008-08-31 15:47:27 +1000548#ifdef CONFIG_PROC_FS
549 .show = crypto_shash_show,
550#endif
Ondrej Mosnacekb8969a12023-05-02 10:02:33 +0200551#if IS_ENABLED(CONFIG_CRYPTO_USER)
Steffen Klassertf4d663c2011-09-27 07:26:10 +0200552 .report = crypto_shash_report,
Herbert Xuc0f9e012023-02-16 18:35:28 +0800553#endif
Herbert Xu42808e52023-02-16 18:35:15 +0800554#ifdef CONFIG_CRYPTO_STATS
555 .report_stat = crypto_shash_report_stat,
556#endif
Herbert Xu7b5a080b2008-08-31 15:47:27 +1000557 .maskclear = ~CRYPTO_ALG_TYPE_MASK,
558 .maskset = CRYPTO_ALG_TYPE_MASK,
559 .type = CRYPTO_ALG_TYPE_SHASH,
560 .tfmsize = offsetof(struct crypto_shash, base),
561};
562
Eric Biggersfdfad1f2020-01-02 19:58:49 -0800563int crypto_grab_shash(struct crypto_shash_spawn *spawn,
564 struct crypto_instance *inst,
565 const char *name, u32 type, u32 mask)
566{
567 spawn->base.frontend = &crypto_shash_type;
568 return crypto_grab_spawn(&spawn->base, inst, name, type, mask);
569}
570EXPORT_SYMBOL_GPL(crypto_grab_shash);
571
Herbert Xu7b5a080b2008-08-31 15:47:27 +1000572struct crypto_shash *crypto_alloc_shash(const char *alg_name, u32 type,
573 u32 mask)
574{
Herbert Xu3f683d62009-02-18 16:56:59 +0800575 return crypto_alloc_tfm(alg_name, &crypto_shash_type, type, mask);
Herbert Xu7b5a080b2008-08-31 15:47:27 +1000576}
577EXPORT_SYMBOL_GPL(crypto_alloc_shash);
578
Hannes Reinecke85cc4242022-06-27 11:51:57 +0200579int crypto_has_shash(const char *alg_name, u32 type, u32 mask)
580{
581 return crypto_type_has_alg(alg_name, &crypto_shash_type, type, mask);
582}
583EXPORT_SYMBOL_GPL(crypto_has_shash);
584
Herbert Xued3630b2023-04-13 14:24:19 +0800585struct crypto_shash *crypto_clone_shash(struct crypto_shash *hash)
586{
587 struct crypto_tfm *tfm = crypto_shash_tfm(hash);
588 struct shash_alg *alg = crypto_shash_alg(hash);
589 struct crypto_shash *nhash;
590 int err;
591
592 if (!crypto_shash_alg_has_setkey(alg)) {
593 tfm = crypto_tfm_get(tfm);
594 if (IS_ERR(tfm))
595 return ERR_CAST(tfm);
596
597 return hash;
598 }
599
Herbert Xub7be31b2023-05-19 17:04:04 +0800600 if (!alg->clone_tfm && (alg->init_tfm || alg->base.cra_init))
Herbert Xued3630b2023-04-13 14:24:19 +0800601 return ERR_PTR(-ENOSYS);
602
603 nhash = crypto_clone_tfm(&crypto_shash_type, tfm);
604 if (IS_ERR(nhash))
605 return nhash;
606
607 nhash->descsize = hash->descsize;
608
Herbert Xub7be31b2023-05-19 17:04:04 +0800609 if (alg->clone_tfm) {
610 err = alg->clone_tfm(nhash, hash);
611 if (err) {
612 crypto_free_shash(nhash);
613 return ERR_PTR(err);
614 }
Herbert Xued3630b2023-04-13 14:24:19 +0800615 }
616
617 return nhash;
618}
619EXPORT_SYMBOL_GPL(crypto_clone_shash);
620
Herbert Xu42808e52023-02-16 18:35:15 +0800621int hash_prepare_alg(struct hash_alg_common *alg)
Herbert Xu7b5a080b2008-08-31 15:47:27 +1000622{
Herbert Xu42808e52023-02-16 18:35:15 +0800623 struct crypto_istat_hash *istat = hash_get_stat(alg);
Herbert Xu7b5a080b2008-08-31 15:47:27 +1000624 struct crypto_alg *base = &alg->base;
625
Herbert Xu9697b322023-03-28 11:57:09 +0800626 if (alg->digestsize > HASH_MAX_DIGESTSIZE)
Herbert Xu7b5a080b2008-08-31 15:47:27 +1000627 return -EINVAL;
628
Herbert Xu42808e52023-02-16 18:35:15 +0800629 base->cra_flags &= ~CRYPTO_ALG_TYPE_MASK;
630
631 if (IS_ENABLED(CONFIG_CRYPTO_STATS))
632 memset(istat, 0, sizeof(*istat));
633
634 return 0;
635}
636
637static int shash_prepare_alg(struct shash_alg *alg)
638{
639 struct crypto_alg *base = &alg->halg.base;
640 int err;
641
642 if (alg->descsize > HASH_MAX_DESCSIZE)
643 return -EINVAL;
644
Herbert Xu1c799572022-11-25 12:36:39 +0800645 if (base->cra_alignmask > MAX_SHASH_ALIGNMASK)
646 return -EINVAL;
647
Eric Biggers41a2e942019-01-06 19:07:20 -0800648 if ((alg->export && !alg->import) || (alg->import && !alg->export))
649 return -EINVAL;
650
Herbert Xu42808e52023-02-16 18:35:15 +0800651 err = hash_prepare_alg(&alg->halg);
652 if (err)
653 return err;
654
Herbert Xu7b5a080b2008-08-31 15:47:27 +1000655 base->cra_type = &crypto_shash_type;
Herbert Xu7b5a080b2008-08-31 15:47:27 +1000656 base->cra_flags |= CRYPTO_ALG_TYPE_SHASH;
Herbert Xu99d27e12009-07-09 20:30:57 +0800657
Herbert Xu8267ada2009-07-09 20:36:44 +0800658 if (!alg->finup)
659 alg->finup = shash_finup_unaligned;
660 if (!alg->digest)
661 alg->digest = shash_digest_unaligned;
Herbert Xuf5926822009-07-22 12:37:06 +0800662 if (!alg->export) {
663 alg->export = shash_default_export;
664 alg->import = shash_default_import;
Herbert Xu42808e52023-02-16 18:35:15 +0800665 alg->halg.statesize = alg->descsize;
Herbert Xuf5926822009-07-22 12:37:06 +0800666 }
Herbert Xu57cfe442009-07-11 22:17:39 +0800667 if (!alg->setkey)
668 alg->setkey = shash_no_setkey;
Herbert Xu99d27e12009-07-09 20:30:57 +0800669
Herbert Xu619a6eb2009-07-08 18:46:23 +0800670 return 0;
671}
672
673int crypto_register_shash(struct shash_alg *alg)
674{
675 struct crypto_alg *base = &alg->base;
676 int err;
677
678 err = shash_prepare_alg(alg);
679 if (err)
680 return err;
Herbert Xu7b5a080b2008-08-31 15:47:27 +1000681
682 return crypto_register_alg(base);
683}
684EXPORT_SYMBOL_GPL(crypto_register_shash);
685
Eric Biggersc6d633a2019-12-15 15:51:19 -0800686void crypto_unregister_shash(struct shash_alg *alg)
Herbert Xu7b5a080b2008-08-31 15:47:27 +1000687{
Eric Biggersc6d633a2019-12-15 15:51:19 -0800688 crypto_unregister_alg(&alg->base);
Herbert Xu7b5a080b2008-08-31 15:47:27 +1000689}
690EXPORT_SYMBOL_GPL(crypto_unregister_shash);
691
Jussi Kivilinna50fc3e82012-07-11 14:20:20 +0300692int crypto_register_shashes(struct shash_alg *algs, int count)
693{
694 int i, ret;
695
696 for (i = 0; i < count; i++) {
697 ret = crypto_register_shash(&algs[i]);
698 if (ret)
699 goto err;
700 }
701
702 return 0;
703
704err:
705 for (--i; i >= 0; --i)
706 crypto_unregister_shash(&algs[i]);
707
708 return ret;
709}
710EXPORT_SYMBOL_GPL(crypto_register_shashes);
711
Eric Biggersc6d633a2019-12-15 15:51:19 -0800712void crypto_unregister_shashes(struct shash_alg *algs, int count)
Jussi Kivilinna50fc3e82012-07-11 14:20:20 +0300713{
Eric Biggersc6d633a2019-12-15 15:51:19 -0800714 int i;
Jussi Kivilinna50fc3e82012-07-11 14:20:20 +0300715
Eric Biggersc6d633a2019-12-15 15:51:19 -0800716 for (i = count - 1; i >= 0; --i)
717 crypto_unregister_shash(&algs[i]);
Jussi Kivilinna50fc3e82012-07-11 14:20:20 +0300718}
719EXPORT_SYMBOL_GPL(crypto_unregister_shashes);
720
Herbert Xu619a6eb2009-07-08 18:46:23 +0800721int shash_register_instance(struct crypto_template *tmpl,
722 struct shash_instance *inst)
723{
724 int err;
725
Eric Biggersd4fdc2d2020-01-02 20:04:40 -0800726 if (WARN_ON(!inst->free))
727 return -EINVAL;
728
Herbert Xu619a6eb2009-07-08 18:46:23 +0800729 err = shash_prepare_alg(&inst->alg);
730 if (err)
731 return err;
732
733 return crypto_register_instance(tmpl, shash_crypto_instance(inst));
734}
735EXPORT_SYMBOL_GPL(shash_register_instance);
736
Eric Biggersa39c66c2020-01-02 20:04:38 -0800737void shash_free_singlespawn_instance(struct shash_instance *inst)
Herbert Xu2e4fddd2009-07-07 15:17:12 +0800738{
Eric Biggersa39c66c2020-01-02 20:04:38 -0800739 crypto_drop_spawn(shash_instance_ctx(inst));
740 kfree(inst);
Herbert Xu2e4fddd2009-07-07 15:17:12 +0800741}
Eric Biggersa39c66c2020-01-02 20:04:38 -0800742EXPORT_SYMBOL_GPL(shash_free_singlespawn_instance);
Herbert Xu2e4fddd2009-07-07 15:17:12 +0800743
Herbert Xu7b5a080b2008-08-31 15:47:27 +1000744MODULE_LICENSE("GPL");
745MODULE_DESCRIPTION("Synchronous cryptographic hash type");