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Commit | Line | Data |
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a61127c2 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
5068c7a8 SK |
2 | /* |
3 | * pcrypt - Parallel crypto wrapper. | |
4 | * | |
5 | * Copyright (C) 2009 secunet Security Networks AG | |
6 | * Copyright (C) 2009 Steffen Klassert <steffen.klassert@secunet.com> | |
5068c7a8 SK |
7 | */ |
8 | ||
9 | #include <crypto/algapi.h> | |
10 | #include <crypto/internal/aead.h> | |
a5a22e57 | 11 | #include <linux/atomic.h> |
5068c7a8 SK |
12 | #include <linux/err.h> |
13 | #include <linux/init.h> | |
14 | #include <linux/module.h> | |
15 | #include <linux/slab.h> | |
a3fb1e33 | 16 | #include <linux/kobject.h> |
d3f64e46 | 17 | #include <linux/cpu.h> |
5068c7a8 SK |
18 | #include <crypto/pcrypt.h> |
19 | ||
63d35788 DJ |
20 | static struct padata_instance *pencrypt; |
21 | static struct padata_instance *pdecrypt; | |
a3fb1e33 | 22 | static struct kset *pcrypt_kset; |
5068c7a8 SK |
23 | |
24 | struct pcrypt_instance_ctx { | |
66d948e7 | 25 | struct crypto_aead_spawn spawn; |
bbefa1dd HX |
26 | struct padata_shell *psenc; |
27 | struct padata_shell *psdec; | |
a5a22e57 | 28 | atomic_t tfm_count; |
5068c7a8 SK |
29 | }; |
30 | ||
31 | struct pcrypt_aead_ctx { | |
32 | struct crypto_aead *child; | |
33 | unsigned int cb_cpu; | |
34 | }; | |
35 | ||
bbefa1dd HX |
36 | static inline struct pcrypt_instance_ctx *pcrypt_tfm_ictx( |
37 | struct crypto_aead *tfm) | |
38 | { | |
39 | return aead_instance_ctx(aead_alg_instance(tfm)); | |
40 | } | |
41 | ||
5068c7a8 SK |
42 | static int pcrypt_aead_setkey(struct crypto_aead *parent, |
43 | const u8 *key, unsigned int keylen) | |
44 | { | |
45 | struct pcrypt_aead_ctx *ctx = crypto_aead_ctx(parent); | |
46 | ||
47 | return crypto_aead_setkey(ctx->child, key, keylen); | |
48 | } | |
49 | ||
50 | static int pcrypt_aead_setauthsize(struct crypto_aead *parent, | |
51 | unsigned int authsize) | |
52 | { | |
53 | struct pcrypt_aead_ctx *ctx = crypto_aead_ctx(parent); | |
54 | ||
55 | return crypto_aead_setauthsize(ctx->child, authsize); | |
56 | } | |
57 | ||
58 | static void pcrypt_aead_serial(struct padata_priv *padata) | |
59 | { | |
60 | struct pcrypt_request *preq = pcrypt_padata_request(padata); | |
61 | struct aead_request *req = pcrypt_request_ctx(preq); | |
62 | ||
63 | aead_request_complete(req->base.data, padata->info); | |
64 | } | |
65 | ||
5068c7a8 SK |
66 | static void pcrypt_aead_done(struct crypto_async_request *areq, int err) |
67 | { | |
68 | struct aead_request *req = areq->data; | |
69 | struct pcrypt_request *preq = aead_request_ctx(req); | |
70 | struct padata_priv *padata = pcrypt_request_padata(preq); | |
71 | ||
72 | padata->info = err; | |
5068c7a8 SK |
73 | |
74 | padata_do_serial(padata); | |
75 | } | |
76 | ||
77 | static void pcrypt_aead_enc(struct padata_priv *padata) | |
78 | { | |
79 | struct pcrypt_request *preq = pcrypt_padata_request(padata); | |
80 | struct aead_request *req = pcrypt_request_ctx(preq); | |
81 | ||
82 | padata->info = crypto_aead_encrypt(req); | |
83 | ||
5a1436be | 84 | if (padata->info == -EINPROGRESS) |
5068c7a8 SK |
85 | return; |
86 | ||
87 | padata_do_serial(padata); | |
88 | } | |
89 | ||
90 | static int pcrypt_aead_encrypt(struct aead_request *req) | |
91 | { | |
92 | int err; | |
93 | struct pcrypt_request *preq = aead_request_ctx(req); | |
94 | struct aead_request *creq = pcrypt_request_ctx(preq); | |
95 | struct padata_priv *padata = pcrypt_request_padata(preq); | |
96 | struct crypto_aead *aead = crypto_aead_reqtfm(req); | |
97 | struct pcrypt_aead_ctx *ctx = crypto_aead_ctx(aead); | |
98 | u32 flags = aead_request_flags(req); | |
bbefa1dd HX |
99 | struct pcrypt_instance_ctx *ictx; |
100 | ||
101 | ictx = pcrypt_tfm_ictx(aead); | |
5068c7a8 SK |
102 | |
103 | memset(padata, 0, sizeof(struct padata_priv)); | |
104 | ||
105 | padata->parallel = pcrypt_aead_enc; | |
106 | padata->serial = pcrypt_aead_serial; | |
107 | ||
108 | aead_request_set_tfm(creq, ctx->child); | |
109 | aead_request_set_callback(creq, flags & ~CRYPTO_TFM_REQ_MAY_SLEEP, | |
110 | pcrypt_aead_done, req); | |
111 | aead_request_set_crypt(creq, req->src, req->dst, | |
112 | req->cryptlen, req->iv); | |
0496f560 | 113 | aead_request_set_ad(creq, req->assoclen); |
5068c7a8 | 114 | |
bbefa1dd | 115 | err = padata_do_parallel(ictx->psenc, padata, &ctx->cb_cpu); |
83f619f3 SK |
116 | if (!err) |
117 | return -EINPROGRESS; | |
5068c7a8 SK |
118 | |
119 | return err; | |
120 | } | |
121 | ||
122 | static void pcrypt_aead_dec(struct padata_priv *padata) | |
123 | { | |
124 | struct pcrypt_request *preq = pcrypt_padata_request(padata); | |
125 | struct aead_request *req = pcrypt_request_ctx(preq); | |
126 | ||
127 | padata->info = crypto_aead_decrypt(req); | |
128 | ||
5a1436be | 129 | if (padata->info == -EINPROGRESS) |
5068c7a8 SK |
130 | return; |
131 | ||
132 | padata_do_serial(padata); | |
133 | } | |
134 | ||
135 | static int pcrypt_aead_decrypt(struct aead_request *req) | |
136 | { | |
137 | int err; | |
138 | struct pcrypt_request *preq = aead_request_ctx(req); | |
139 | struct aead_request *creq = pcrypt_request_ctx(preq); | |
140 | struct padata_priv *padata = pcrypt_request_padata(preq); | |
141 | struct crypto_aead *aead = crypto_aead_reqtfm(req); | |
142 | struct pcrypt_aead_ctx *ctx = crypto_aead_ctx(aead); | |
143 | u32 flags = aead_request_flags(req); | |
bbefa1dd HX |
144 | struct pcrypt_instance_ctx *ictx; |
145 | ||
146 | ictx = pcrypt_tfm_ictx(aead); | |
5068c7a8 SK |
147 | |
148 | memset(padata, 0, sizeof(struct padata_priv)); | |
149 | ||
150 | padata->parallel = pcrypt_aead_dec; | |
151 | padata->serial = pcrypt_aead_serial; | |
152 | ||
153 | aead_request_set_tfm(creq, ctx->child); | |
154 | aead_request_set_callback(creq, flags & ~CRYPTO_TFM_REQ_MAY_SLEEP, | |
155 | pcrypt_aead_done, req); | |
156 | aead_request_set_crypt(creq, req->src, req->dst, | |
157 | req->cryptlen, req->iv); | |
0496f560 | 158 | aead_request_set_ad(creq, req->assoclen); |
5068c7a8 | 159 | |
bbefa1dd | 160 | err = padata_do_parallel(ictx->psdec, padata, &ctx->cb_cpu); |
83f619f3 SK |
161 | if (!err) |
162 | return -EINPROGRESS; | |
5068c7a8 SK |
163 | |
164 | return err; | |
165 | } | |
166 | ||
0496f560 | 167 | static int pcrypt_aead_init_tfm(struct crypto_aead *tfm) |
5068c7a8 SK |
168 | { |
169 | int cpu, cpu_index; | |
0496f560 HX |
170 | struct aead_instance *inst = aead_alg_instance(tfm); |
171 | struct pcrypt_instance_ctx *ictx = aead_instance_ctx(inst); | |
172 | struct pcrypt_aead_ctx *ctx = crypto_aead_ctx(tfm); | |
5068c7a8 SK |
173 | struct crypto_aead *cipher; |
174 | ||
a5a22e57 HX |
175 | cpu_index = (unsigned int)atomic_inc_return(&ictx->tfm_count) % |
176 | cpumask_weight(cpu_online_mask); | |
5068c7a8 | 177 | |
fbf0ca1b | 178 | ctx->cb_cpu = cpumask_first(cpu_online_mask); |
5068c7a8 | 179 | for (cpu = 0; cpu < cpu_index; cpu++) |
fbf0ca1b | 180 | ctx->cb_cpu = cpumask_next(ctx->cb_cpu, cpu_online_mask); |
5068c7a8 | 181 | |
0496f560 | 182 | cipher = crypto_spawn_aead(&ictx->spawn); |
5068c7a8 SK |
183 | |
184 | if (IS_ERR(cipher)) | |
185 | return PTR_ERR(cipher); | |
186 | ||
187 | ctx->child = cipher; | |
0496f560 HX |
188 | crypto_aead_set_reqsize(tfm, sizeof(struct pcrypt_request) + |
189 | sizeof(struct aead_request) + | |
190 | crypto_aead_reqsize(cipher)); | |
5068c7a8 SK |
191 | |
192 | return 0; | |
193 | } | |
194 | ||
0496f560 | 195 | static void pcrypt_aead_exit_tfm(struct crypto_aead *tfm) |
5068c7a8 | 196 | { |
0496f560 | 197 | struct pcrypt_aead_ctx *ctx = crypto_aead_ctx(tfm); |
5068c7a8 SK |
198 | |
199 | crypto_free_aead(ctx->child); | |
200 | } | |
201 | ||
d76c6810 EB |
202 | static void pcrypt_free(struct aead_instance *inst) |
203 | { | |
204 | struct pcrypt_instance_ctx *ctx = aead_instance_ctx(inst); | |
205 | ||
206 | crypto_drop_aead(&ctx->spawn); | |
bbefa1dd HX |
207 | padata_free_shell(ctx->psdec); |
208 | padata_free_shell(ctx->psenc); | |
d76c6810 EB |
209 | kfree(inst); |
210 | } | |
211 | ||
66d948e7 HX |
212 | static int pcrypt_init_instance(struct crypto_instance *inst, |
213 | struct crypto_alg *alg) | |
5068c7a8 | 214 | { |
5068c7a8 SK |
215 | if (snprintf(inst->alg.cra_driver_name, CRYPTO_MAX_ALG_NAME, |
216 | "pcrypt(%s)", alg->cra_driver_name) >= CRYPTO_MAX_ALG_NAME) | |
66d948e7 | 217 | return -ENAMETOOLONG; |
5068c7a8 SK |
218 | |
219 | memcpy(inst->alg.cra_name, alg->cra_name, CRYPTO_MAX_ALG_NAME); | |
220 | ||
5068c7a8 SK |
221 | inst->alg.cra_priority = alg->cra_priority + 100; |
222 | inst->alg.cra_blocksize = alg->cra_blocksize; | |
223 | inst->alg.cra_alignmask = alg->cra_alignmask; | |
224 | ||
66d948e7 | 225 | return 0; |
5068c7a8 SK |
226 | } |
227 | ||
0496f560 HX |
228 | static int pcrypt_create_aead(struct crypto_template *tmpl, struct rtattr **tb, |
229 | u32 type, u32 mask) | |
5068c7a8 | 230 | { |
66d948e7 | 231 | struct pcrypt_instance_ctx *ctx; |
846f97df | 232 | struct crypto_attr_type *algt; |
0496f560 HX |
233 | struct aead_instance *inst; |
234 | struct aead_alg *alg; | |
66d948e7 HX |
235 | int err; |
236 | ||
846f97df HX |
237 | algt = crypto_get_attr_type(tb); |
238 | if (IS_ERR(algt)) | |
239 | return PTR_ERR(algt); | |
240 | ||
66d948e7 HX |
241 | inst = kzalloc(sizeof(*inst) + sizeof(*ctx), GFP_KERNEL); |
242 | if (!inst) | |
0496f560 | 243 | return -ENOMEM; |
66d948e7 | 244 | |
bbefa1dd HX |
245 | err = -ENOMEM; |
246 | ||
0496f560 | 247 | ctx = aead_instance_ctx(inst); |
bbefa1dd HX |
248 | ctx->psenc = padata_alloc_shell(pencrypt); |
249 | if (!ctx->psenc) | |
07b24c7c | 250 | goto err_free_inst; |
bbefa1dd HX |
251 | |
252 | ctx->psdec = padata_alloc_shell(pdecrypt); | |
253 | if (!ctx->psdec) | |
07b24c7c | 254 | goto err_free_inst; |
bbefa1dd | 255 | |
cd900f0c | 256 | err = crypto_grab_aead(&ctx->spawn, aead_crypto_instance(inst), |
07b24c7c | 257 | crypto_attr_alg_name(tb[1]), 0, 0); |
66d948e7 | 258 | if (err) |
07b24c7c | 259 | goto err_free_inst; |
5068c7a8 | 260 | |
0496f560 HX |
261 | alg = crypto_spawn_aead_alg(&ctx->spawn); |
262 | err = pcrypt_init_instance(aead_crypto_instance(inst), &alg->base); | |
66d948e7 | 263 | if (err) |
07b24c7c | 264 | goto err_free_inst; |
5068c7a8 | 265 | |
846f97df | 266 | inst->alg.base.cra_flags = CRYPTO_ALG_ASYNC; |
846f97df | 267 | |
0496f560 HX |
268 | inst->alg.ivsize = crypto_aead_alg_ivsize(alg); |
269 | inst->alg.maxauthsize = crypto_aead_alg_maxauthsize(alg); | |
5068c7a8 | 270 | |
0496f560 | 271 | inst->alg.base.cra_ctxsize = sizeof(struct pcrypt_aead_ctx); |
5068c7a8 | 272 | |
0496f560 HX |
273 | inst->alg.init = pcrypt_aead_init_tfm; |
274 | inst->alg.exit = pcrypt_aead_exit_tfm; | |
5068c7a8 | 275 | |
0496f560 HX |
276 | inst->alg.setkey = pcrypt_aead_setkey; |
277 | inst->alg.setauthsize = pcrypt_aead_setauthsize; | |
278 | inst->alg.encrypt = pcrypt_aead_encrypt; | |
279 | inst->alg.decrypt = pcrypt_aead_decrypt; | |
5068c7a8 | 280 | |
d76c6810 EB |
281 | inst->free = pcrypt_free; |
282 | ||
0496f560 | 283 | err = aead_register_instance(tmpl, inst); |
07b24c7c EB |
284 | if (err) { |
285 | err_free_inst: | |
286 | pcrypt_free(inst); | |
287 | } | |
0496f560 | 288 | return err; |
5068c7a8 SK |
289 | } |
290 | ||
0496f560 | 291 | static int pcrypt_create(struct crypto_template *tmpl, struct rtattr **tb) |
5068c7a8 SK |
292 | { |
293 | struct crypto_attr_type *algt; | |
294 | ||
295 | algt = crypto_get_attr_type(tb); | |
296 | if (IS_ERR(algt)) | |
0496f560 | 297 | return PTR_ERR(algt); |
5068c7a8 SK |
298 | |
299 | switch (algt->type & algt->mask & CRYPTO_ALG_TYPE_MASK) { | |
300 | case CRYPTO_ALG_TYPE_AEAD: | |
0496f560 | 301 | return pcrypt_create_aead(tmpl, tb, algt->type, algt->mask); |
5068c7a8 SK |
302 | } |
303 | ||
0496f560 | 304 | return -EINVAL; |
5068c7a8 SK |
305 | } |
306 | ||
a3fb1e33 DK |
307 | static int pcrypt_sysfs_add(struct padata_instance *pinst, const char *name) |
308 | { | |
309 | int ret; | |
310 | ||
311 | pinst->kobj.kset = pcrypt_kset; | |
b1e3874c | 312 | ret = kobject_add(&pinst->kobj, NULL, "%s", name); |
a3fb1e33 DK |
313 | if (!ret) |
314 | kobject_uevent(&pinst->kobj, KOBJ_ADD); | |
315 | ||
316 | return ret; | |
317 | } | |
318 | ||
63d35788 | 319 | static int pcrypt_init_padata(struct padata_instance **pinst, const char *name) |
e15bacbe DK |
320 | { |
321 | int ret = -ENOMEM; | |
e15bacbe | 322 | |
63d35788 DJ |
323 | *pinst = padata_alloc_possible(name); |
324 | if (!*pinst) | |
325 | return ret; | |
e15bacbe | 326 | |
63d35788 | 327 | ret = pcrypt_sysfs_add(*pinst, name); |
a3fb1e33 | 328 | if (ret) |
63d35788 | 329 | padata_free(*pinst); |
a3fb1e33 | 330 | |
e15bacbe DK |
331 | return ret; |
332 | } | |
333 | ||
63d35788 | 334 | static void pcrypt_fini_padata(struct padata_instance *pinst) |
e15bacbe | 335 | { |
63d35788 DJ |
336 | padata_stop(pinst); |
337 | padata_free(pinst); | |
e15bacbe DK |
338 | } |
339 | ||
5068c7a8 SK |
340 | static struct crypto_template pcrypt_tmpl = { |
341 | .name = "pcrypt", | |
0496f560 | 342 | .create = pcrypt_create, |
5068c7a8 SK |
343 | .module = THIS_MODULE, |
344 | }; | |
345 | ||
346 | static int __init pcrypt_init(void) | |
347 | { | |
a3fb1e33 DK |
348 | int err = -ENOMEM; |
349 | ||
350 | pcrypt_kset = kset_create_and_add("pcrypt", NULL, kernel_kobj); | |
351 | if (!pcrypt_kset) | |
352 | goto err; | |
5068c7a8 | 353 | |
c57e842e | 354 | err = pcrypt_init_padata(&pencrypt, "pencrypt"); |
4c879170 | 355 | if (err) |
a3fb1e33 | 356 | goto err_unreg_kset; |
4c879170 | 357 | |
c57e842e | 358 | err = pcrypt_init_padata(&pdecrypt, "pdecrypt"); |
4c879170 | 359 | if (err) |
e15bacbe | 360 | goto err_deinit_pencrypt; |
4c879170 | 361 | |
63d35788 DJ |
362 | padata_start(pencrypt); |
363 | padata_start(pdecrypt); | |
5068c7a8 | 364 | |
e15bacbe | 365 | return crypto_register_template(&pcrypt_tmpl); |
5068c7a8 | 366 | |
e15bacbe | 367 | err_deinit_pencrypt: |
63d35788 | 368 | pcrypt_fini_padata(pencrypt); |
a3fb1e33 DK |
369 | err_unreg_kset: |
370 | kset_unregister(pcrypt_kset); | |
5068c7a8 | 371 | err: |
4c879170 | 372 | return err; |
5068c7a8 SK |
373 | } |
374 | ||
375 | static void __exit pcrypt_exit(void) | |
376 | { | |
07bfd9bd HX |
377 | crypto_unregister_template(&pcrypt_tmpl); |
378 | ||
63d35788 DJ |
379 | pcrypt_fini_padata(pencrypt); |
380 | pcrypt_fini_padata(pdecrypt); | |
5068c7a8 | 381 | |
a3fb1e33 | 382 | kset_unregister(pcrypt_kset); |
5068c7a8 SK |
383 | } |
384 | ||
c4741b23 | 385 | subsys_initcall(pcrypt_init); |
5068c7a8 SK |
386 | module_exit(pcrypt_exit); |
387 | ||
388 | MODULE_LICENSE("GPL"); | |
389 | MODULE_AUTHOR("Steffen Klassert <steffen.klassert@secunet.com>"); | |
390 | MODULE_DESCRIPTION("Parallel crypto wrapper"); | |
4943ba16 | 391 | MODULE_ALIAS_CRYPTO("pcrypt"); |