Commit | Line | Data |
---|---|---|
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> | |
e15bacbe | 16 | #include <linux/notifier.h> |
a3fb1e33 | 17 | #include <linux/kobject.h> |
d3f64e46 | 18 | #include <linux/cpu.h> |
5068c7a8 SK |
19 | #include <crypto/pcrypt.h> |
20 | ||
63d35788 DJ |
21 | static struct padata_instance *pencrypt; |
22 | static struct padata_instance *pdecrypt; | |
a3fb1e33 | 23 | static struct kset *pcrypt_kset; |
5068c7a8 SK |
24 | |
25 | struct pcrypt_instance_ctx { | |
66d948e7 | 26 | struct crypto_aead_spawn spawn; |
a5a22e57 | 27 | atomic_t tfm_count; |
5068c7a8 SK |
28 | }; |
29 | ||
30 | struct pcrypt_aead_ctx { | |
31 | struct crypto_aead *child; | |
32 | unsigned int cb_cpu; | |
33 | }; | |
34 | ||
5068c7a8 SK |
35 | static int pcrypt_aead_setkey(struct crypto_aead *parent, |
36 | const u8 *key, unsigned int keylen) | |
37 | { | |
38 | struct pcrypt_aead_ctx *ctx = crypto_aead_ctx(parent); | |
39 | ||
40 | return crypto_aead_setkey(ctx->child, key, keylen); | |
41 | } | |
42 | ||
43 | static int pcrypt_aead_setauthsize(struct crypto_aead *parent, | |
44 | unsigned int authsize) | |
45 | { | |
46 | struct pcrypt_aead_ctx *ctx = crypto_aead_ctx(parent); | |
47 | ||
48 | return crypto_aead_setauthsize(ctx->child, authsize); | |
49 | } | |
50 | ||
51 | static void pcrypt_aead_serial(struct padata_priv *padata) | |
52 | { | |
53 | struct pcrypt_request *preq = pcrypt_padata_request(padata); | |
54 | struct aead_request *req = pcrypt_request_ctx(preq); | |
55 | ||
56 | aead_request_complete(req->base.data, padata->info); | |
57 | } | |
58 | ||
5068c7a8 SK |
59 | static void pcrypt_aead_done(struct crypto_async_request *areq, int err) |
60 | { | |
61 | struct aead_request *req = areq->data; | |
62 | struct pcrypt_request *preq = aead_request_ctx(req); | |
63 | struct padata_priv *padata = pcrypt_request_padata(preq); | |
64 | ||
65 | padata->info = err; | |
66 | req->base.flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP; | |
67 | ||
68 | padata_do_serial(padata); | |
69 | } | |
70 | ||
71 | static void pcrypt_aead_enc(struct padata_priv *padata) | |
72 | { | |
73 | struct pcrypt_request *preq = pcrypt_padata_request(padata); | |
74 | struct aead_request *req = pcrypt_request_ctx(preq); | |
75 | ||
76 | padata->info = crypto_aead_encrypt(req); | |
77 | ||
5a1436be | 78 | if (padata->info == -EINPROGRESS) |
5068c7a8 SK |
79 | return; |
80 | ||
81 | padata_do_serial(padata); | |
82 | } | |
83 | ||
84 | static int pcrypt_aead_encrypt(struct aead_request *req) | |
85 | { | |
86 | int err; | |
87 | struct pcrypt_request *preq = aead_request_ctx(req); | |
88 | struct aead_request *creq = pcrypt_request_ctx(preq); | |
89 | struct padata_priv *padata = pcrypt_request_padata(preq); | |
90 | struct crypto_aead *aead = crypto_aead_reqtfm(req); | |
91 | struct pcrypt_aead_ctx *ctx = crypto_aead_ctx(aead); | |
92 | u32 flags = aead_request_flags(req); | |
93 | ||
94 | memset(padata, 0, sizeof(struct padata_priv)); | |
95 | ||
96 | padata->parallel = pcrypt_aead_enc; | |
97 | padata->serial = pcrypt_aead_serial; | |
98 | ||
99 | aead_request_set_tfm(creq, ctx->child); | |
100 | aead_request_set_callback(creq, flags & ~CRYPTO_TFM_REQ_MAY_SLEEP, | |
101 | pcrypt_aead_done, req); | |
102 | aead_request_set_crypt(creq, req->src, req->dst, | |
103 | req->cryptlen, req->iv); | |
0496f560 | 104 | aead_request_set_ad(creq, req->assoclen); |
5068c7a8 | 105 | |
63d35788 | 106 | err = padata_do_parallel(pencrypt, padata, &ctx->cb_cpu); |
83f619f3 SK |
107 | if (!err) |
108 | return -EINPROGRESS; | |
5068c7a8 SK |
109 | |
110 | return err; | |
111 | } | |
112 | ||
113 | static void pcrypt_aead_dec(struct padata_priv *padata) | |
114 | { | |
115 | struct pcrypt_request *preq = pcrypt_padata_request(padata); | |
116 | struct aead_request *req = pcrypt_request_ctx(preq); | |
117 | ||
118 | padata->info = crypto_aead_decrypt(req); | |
119 | ||
5a1436be | 120 | if (padata->info == -EINPROGRESS) |
5068c7a8 SK |
121 | return; |
122 | ||
123 | padata_do_serial(padata); | |
124 | } | |
125 | ||
126 | static int pcrypt_aead_decrypt(struct aead_request *req) | |
127 | { | |
128 | int err; | |
129 | struct pcrypt_request *preq = aead_request_ctx(req); | |
130 | struct aead_request *creq = pcrypt_request_ctx(preq); | |
131 | struct padata_priv *padata = pcrypt_request_padata(preq); | |
132 | struct crypto_aead *aead = crypto_aead_reqtfm(req); | |
133 | struct pcrypt_aead_ctx *ctx = crypto_aead_ctx(aead); | |
134 | u32 flags = aead_request_flags(req); | |
135 | ||
136 | memset(padata, 0, sizeof(struct padata_priv)); | |
137 | ||
138 | padata->parallel = pcrypt_aead_dec; | |
139 | padata->serial = pcrypt_aead_serial; | |
140 | ||
141 | aead_request_set_tfm(creq, ctx->child); | |
142 | aead_request_set_callback(creq, flags & ~CRYPTO_TFM_REQ_MAY_SLEEP, | |
143 | pcrypt_aead_done, req); | |
144 | aead_request_set_crypt(creq, req->src, req->dst, | |
145 | req->cryptlen, req->iv); | |
0496f560 | 146 | aead_request_set_ad(creq, req->assoclen); |
5068c7a8 | 147 | |
63d35788 | 148 | err = padata_do_parallel(pdecrypt, padata, &ctx->cb_cpu); |
83f619f3 SK |
149 | if (!err) |
150 | return -EINPROGRESS; | |
5068c7a8 SK |
151 | |
152 | return err; | |
153 | } | |
154 | ||
0496f560 | 155 | static int pcrypt_aead_init_tfm(struct crypto_aead *tfm) |
5068c7a8 SK |
156 | { |
157 | int cpu, cpu_index; | |
0496f560 HX |
158 | struct aead_instance *inst = aead_alg_instance(tfm); |
159 | struct pcrypt_instance_ctx *ictx = aead_instance_ctx(inst); | |
160 | struct pcrypt_aead_ctx *ctx = crypto_aead_ctx(tfm); | |
5068c7a8 SK |
161 | struct crypto_aead *cipher; |
162 | ||
a5a22e57 HX |
163 | cpu_index = (unsigned int)atomic_inc_return(&ictx->tfm_count) % |
164 | cpumask_weight(cpu_online_mask); | |
5068c7a8 | 165 | |
fbf0ca1b | 166 | ctx->cb_cpu = cpumask_first(cpu_online_mask); |
5068c7a8 | 167 | for (cpu = 0; cpu < cpu_index; cpu++) |
fbf0ca1b | 168 | ctx->cb_cpu = cpumask_next(ctx->cb_cpu, cpu_online_mask); |
5068c7a8 | 169 | |
0496f560 | 170 | cipher = crypto_spawn_aead(&ictx->spawn); |
5068c7a8 SK |
171 | |
172 | if (IS_ERR(cipher)) | |
173 | return PTR_ERR(cipher); | |
174 | ||
175 | ctx->child = cipher; | |
0496f560 HX |
176 | crypto_aead_set_reqsize(tfm, sizeof(struct pcrypt_request) + |
177 | sizeof(struct aead_request) + | |
178 | crypto_aead_reqsize(cipher)); | |
5068c7a8 SK |
179 | |
180 | return 0; | |
181 | } | |
182 | ||
0496f560 | 183 | static void pcrypt_aead_exit_tfm(struct crypto_aead *tfm) |
5068c7a8 | 184 | { |
0496f560 | 185 | struct pcrypt_aead_ctx *ctx = crypto_aead_ctx(tfm); |
5068c7a8 SK |
186 | |
187 | crypto_free_aead(ctx->child); | |
188 | } | |
189 | ||
d76c6810 EB |
190 | static void pcrypt_free(struct aead_instance *inst) |
191 | { | |
192 | struct pcrypt_instance_ctx *ctx = aead_instance_ctx(inst); | |
193 | ||
194 | crypto_drop_aead(&ctx->spawn); | |
195 | kfree(inst); | |
196 | } | |
197 | ||
66d948e7 HX |
198 | static int pcrypt_init_instance(struct crypto_instance *inst, |
199 | struct crypto_alg *alg) | |
5068c7a8 | 200 | { |
5068c7a8 SK |
201 | if (snprintf(inst->alg.cra_driver_name, CRYPTO_MAX_ALG_NAME, |
202 | "pcrypt(%s)", alg->cra_driver_name) >= CRYPTO_MAX_ALG_NAME) | |
66d948e7 | 203 | return -ENAMETOOLONG; |
5068c7a8 SK |
204 | |
205 | memcpy(inst->alg.cra_name, alg->cra_name, CRYPTO_MAX_ALG_NAME); | |
206 | ||
5068c7a8 SK |
207 | inst->alg.cra_priority = alg->cra_priority + 100; |
208 | inst->alg.cra_blocksize = alg->cra_blocksize; | |
209 | inst->alg.cra_alignmask = alg->cra_alignmask; | |
210 | ||
66d948e7 | 211 | return 0; |
5068c7a8 SK |
212 | } |
213 | ||
0496f560 HX |
214 | static int pcrypt_create_aead(struct crypto_template *tmpl, struct rtattr **tb, |
215 | u32 type, u32 mask) | |
5068c7a8 | 216 | { |
66d948e7 | 217 | struct pcrypt_instance_ctx *ctx; |
846f97df | 218 | struct crypto_attr_type *algt; |
0496f560 HX |
219 | struct aead_instance *inst; |
220 | struct aead_alg *alg; | |
66d948e7 HX |
221 | const char *name; |
222 | int err; | |
223 | ||
846f97df HX |
224 | algt = crypto_get_attr_type(tb); |
225 | if (IS_ERR(algt)) | |
226 | return PTR_ERR(algt); | |
227 | ||
66d948e7 HX |
228 | name = crypto_attr_alg_name(tb[1]); |
229 | if (IS_ERR(name)) | |
0496f560 | 230 | return PTR_ERR(name); |
66d948e7 HX |
231 | |
232 | inst = kzalloc(sizeof(*inst) + sizeof(*ctx), GFP_KERNEL); | |
233 | if (!inst) | |
0496f560 | 234 | return -ENOMEM; |
66d948e7 | 235 | |
0496f560 HX |
236 | ctx = aead_instance_ctx(inst); |
237 | crypto_set_aead_spawn(&ctx->spawn, aead_crypto_instance(inst)); | |
5068c7a8 | 238 | |
5e4b8c1f | 239 | err = crypto_grab_aead(&ctx->spawn, name, 0, 0); |
66d948e7 HX |
240 | if (err) |
241 | goto out_free_inst; | |
5068c7a8 | 242 | |
0496f560 HX |
243 | alg = crypto_spawn_aead_alg(&ctx->spawn); |
244 | err = pcrypt_init_instance(aead_crypto_instance(inst), &alg->base); | |
66d948e7 HX |
245 | if (err) |
246 | goto out_drop_aead; | |
5068c7a8 | 247 | |
846f97df | 248 | inst->alg.base.cra_flags = CRYPTO_ALG_ASYNC; |
846f97df | 249 | |
0496f560 HX |
250 | inst->alg.ivsize = crypto_aead_alg_ivsize(alg); |
251 | inst->alg.maxauthsize = crypto_aead_alg_maxauthsize(alg); | |
5068c7a8 | 252 | |
0496f560 | 253 | inst->alg.base.cra_ctxsize = sizeof(struct pcrypt_aead_ctx); |
5068c7a8 | 254 | |
0496f560 HX |
255 | inst->alg.init = pcrypt_aead_init_tfm; |
256 | inst->alg.exit = pcrypt_aead_exit_tfm; | |
5068c7a8 | 257 | |
0496f560 HX |
258 | inst->alg.setkey = pcrypt_aead_setkey; |
259 | inst->alg.setauthsize = pcrypt_aead_setauthsize; | |
260 | inst->alg.encrypt = pcrypt_aead_encrypt; | |
261 | inst->alg.decrypt = pcrypt_aead_decrypt; | |
5068c7a8 | 262 | |
d76c6810 EB |
263 | inst->free = pcrypt_free; |
264 | ||
0496f560 HX |
265 | err = aead_register_instance(tmpl, inst); |
266 | if (err) | |
267 | goto out_drop_aead; | |
5068c7a8 | 268 | |
66d948e7 | 269 | out: |
0496f560 | 270 | return err; |
66d948e7 HX |
271 | |
272 | out_drop_aead: | |
273 | crypto_drop_aead(&ctx->spawn); | |
274 | out_free_inst: | |
275 | kfree(inst); | |
66d948e7 | 276 | goto out; |
5068c7a8 SK |
277 | } |
278 | ||
0496f560 | 279 | static int pcrypt_create(struct crypto_template *tmpl, struct rtattr **tb) |
5068c7a8 SK |
280 | { |
281 | struct crypto_attr_type *algt; | |
282 | ||
283 | algt = crypto_get_attr_type(tb); | |
284 | if (IS_ERR(algt)) | |
0496f560 | 285 | return PTR_ERR(algt); |
5068c7a8 SK |
286 | |
287 | switch (algt->type & algt->mask & CRYPTO_ALG_TYPE_MASK) { | |
288 | case CRYPTO_ALG_TYPE_AEAD: | |
0496f560 | 289 | return pcrypt_create_aead(tmpl, tb, algt->type, algt->mask); |
5068c7a8 SK |
290 | } |
291 | ||
0496f560 | 292 | return -EINVAL; |
5068c7a8 SK |
293 | } |
294 | ||
a3fb1e33 DK |
295 | static int pcrypt_sysfs_add(struct padata_instance *pinst, const char *name) |
296 | { | |
297 | int ret; | |
298 | ||
299 | pinst->kobj.kset = pcrypt_kset; | |
b1e3874c | 300 | ret = kobject_add(&pinst->kobj, NULL, "%s", name); |
a3fb1e33 DK |
301 | if (!ret) |
302 | kobject_uevent(&pinst->kobj, KOBJ_ADD); | |
303 | ||
304 | return ret; | |
305 | } | |
306 | ||
63d35788 | 307 | static int pcrypt_init_padata(struct padata_instance **pinst, const char *name) |
e15bacbe DK |
308 | { |
309 | int ret = -ENOMEM; | |
e15bacbe | 310 | |
63d35788 DJ |
311 | *pinst = padata_alloc_possible(name); |
312 | if (!*pinst) | |
313 | return ret; | |
e15bacbe | 314 | |
63d35788 | 315 | ret = pcrypt_sysfs_add(*pinst, name); |
a3fb1e33 | 316 | if (ret) |
63d35788 | 317 | padata_free(*pinst); |
a3fb1e33 | 318 | |
e15bacbe DK |
319 | return ret; |
320 | } | |
321 | ||
63d35788 | 322 | static void pcrypt_fini_padata(struct padata_instance *pinst) |
e15bacbe | 323 | { |
63d35788 DJ |
324 | padata_stop(pinst); |
325 | padata_free(pinst); | |
e15bacbe DK |
326 | } |
327 | ||
5068c7a8 SK |
328 | static struct crypto_template pcrypt_tmpl = { |
329 | .name = "pcrypt", | |
0496f560 | 330 | .create = pcrypt_create, |
5068c7a8 SK |
331 | .module = THIS_MODULE, |
332 | }; | |
333 | ||
334 | static int __init pcrypt_init(void) | |
335 | { | |
a3fb1e33 DK |
336 | int err = -ENOMEM; |
337 | ||
338 | pcrypt_kset = kset_create_and_add("pcrypt", NULL, kernel_kobj); | |
339 | if (!pcrypt_kset) | |
340 | goto err; | |
5068c7a8 | 341 | |
c57e842e | 342 | err = pcrypt_init_padata(&pencrypt, "pencrypt"); |
4c879170 | 343 | if (err) |
a3fb1e33 | 344 | goto err_unreg_kset; |
4c879170 | 345 | |
c57e842e | 346 | err = pcrypt_init_padata(&pdecrypt, "pdecrypt"); |
4c879170 | 347 | if (err) |
e15bacbe | 348 | goto err_deinit_pencrypt; |
4c879170 | 349 | |
63d35788 DJ |
350 | padata_start(pencrypt); |
351 | padata_start(pdecrypt); | |
5068c7a8 | 352 | |
e15bacbe | 353 | return crypto_register_template(&pcrypt_tmpl); |
5068c7a8 | 354 | |
e15bacbe | 355 | err_deinit_pencrypt: |
63d35788 | 356 | pcrypt_fini_padata(pencrypt); |
a3fb1e33 DK |
357 | err_unreg_kset: |
358 | kset_unregister(pcrypt_kset); | |
5068c7a8 | 359 | err: |
4c879170 | 360 | return err; |
5068c7a8 SK |
361 | } |
362 | ||
363 | static void __exit pcrypt_exit(void) | |
364 | { | |
63d35788 DJ |
365 | pcrypt_fini_padata(pencrypt); |
366 | pcrypt_fini_padata(pdecrypt); | |
5068c7a8 | 367 | |
a3fb1e33 | 368 | kset_unregister(pcrypt_kset); |
5068c7a8 SK |
369 | crypto_unregister_template(&pcrypt_tmpl); |
370 | } | |
371 | ||
c4741b23 | 372 | subsys_initcall(pcrypt_init); |
5068c7a8 SK |
373 | module_exit(pcrypt_exit); |
374 | ||
375 | MODULE_LICENSE("GPL"); | |
376 | MODULE_AUTHOR("Steffen Klassert <steffen.klassert@secunet.com>"); | |
377 | MODULE_DESCRIPTION("Parallel crypto wrapper"); | |
4943ba16 | 378 | MODULE_ALIAS_CRYPTO("pcrypt"); |