Blame view
crypto/algapi.c
22.4 KB
cce9e06d1 [CRYPTO] api: Spl... |
1 2 3 4 5 6 7 8 9 10 11 |
/* * Cryptographic API for algorithms (i.e., low-level API). * * Copyright (c) 2006 Herbert Xu <herbert@gondor.apana.org.au> * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License as published by the Free * Software Foundation; either version 2 of the License, or (at your option) * any later version. * */ |
13c935bb0 crypto: api - lay... |
12 |
#include <crypto/algapi.h> |
6bfd48096 [CRYPTO] api: Add... |
13 |
#include <linux/err.h> |
cce9e06d1 [CRYPTO] api: Spl... |
14 |
#include <linux/errno.h> |
3133d76fc crypto: api - Inc... |
15 |
#include <linux/fips.h> |
cce9e06d1 [CRYPTO] api: Spl... |
16 17 |
#include <linux/init.h> #include <linux/kernel.h> |
4cc7720cd [CRYPTO] api: Add... |
18 |
#include <linux/list.h> |
cce9e06d1 [CRYPTO] api: Spl... |
19 |
#include <linux/module.h> |
7fed0bf27 [CRYPTO] api: Add... |
20 |
#include <linux/rtnetlink.h> |
5a0e3ad6a include cleanup: ... |
21 |
#include <linux/slab.h> |
cce9e06d1 [CRYPTO] api: Spl... |
22 23 24 |
#include <linux/string.h> #include "internal.h" |
4cc7720cd [CRYPTO] api: Add... |
25 |
static LIST_HEAD(crypto_template_list); |
cce9e06d1 [CRYPTO] api: Spl... |
26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 |
static inline int crypto_set_driver_name(struct crypto_alg *alg) { static const char suffix[] = "-generic"; char *driver_name = alg->cra_driver_name; int len; if (*driver_name) return 0; len = strlcpy(driver_name, alg->cra_name, CRYPTO_MAX_ALG_NAME); if (len + sizeof(suffix) > CRYPTO_MAX_ALG_NAME) return -ENAMETOOLONG; memcpy(driver_name + len, suffix, sizeof(suffix)); return 0; } |
002c77a48 crypto: fips - on... |
42 43 |
static inline void crypto_check_module_sig(struct module *mod) { |
59afdc7b3 crypto: api - Mov... |
44 |
if (fips_enabled && mod && !module_sig_ok(mod)) |
002c77a48 crypto: fips - on... |
45 46 |
panic("Module %s signature verification failed in FIPS mode ", |
bd4a7c69a crypto: api - Fix... |
47 |
module_name(mod)); |
002c77a48 crypto: fips - on... |
48 |
} |
4cc7720cd [CRYPTO] api: Add... |
49 |
static int crypto_check_alg(struct crypto_alg *alg) |
cce9e06d1 [CRYPTO] api: Spl... |
50 |
{ |
002c77a48 crypto: fips - on... |
51 |
crypto_check_module_sig(alg->cra_module); |
cce9e06d1 [CRYPTO] api: Spl... |
52 53 |
if (alg->cra_alignmask & (alg->cra_alignmask + 1)) return -EINVAL; |
cce9e06d1 [CRYPTO] api: Spl... |
54 55 |
if (alg->cra_blocksize > PAGE_SIZE / 8) return -EINVAL; |
13c935bb0 crypto: api - lay... |
56 57 58 59 60 61 62 63 |
if (!alg->cra_type && (alg->cra_flags & CRYPTO_ALG_TYPE_MASK) == CRYPTO_ALG_TYPE_CIPHER) { if (alg->cra_alignmask > MAX_CIPHER_ALIGNMASK) return -EINVAL; if (alg->cra_blocksize > MAX_CIPHER_BLOCKSIZE) return -EINVAL; } |
cce9e06d1 [CRYPTO] api: Spl... |
64 65 |
if (alg->cra_priority < 0) return -EINVAL; |
cce9e06d1 [CRYPTO] api: Spl... |
66 |
|
ce8614a31 crypto: algapi - ... |
67 |
refcount_set(&alg->cra_refcnt, 1); |
e9b8e5beb crypto: api - Mov... |
68 |
|
4cc7720cd [CRYPTO] api: Add... |
69 70 |
return crypto_set_driver_name(alg); } |
319382a69 crypto: api - Add... |
71 72 73 74 75 76 77 78 79 |
static void crypto_free_instance(struct crypto_instance *inst) { if (!inst->alg.cra_type->free) { inst->tmpl->free(inst); return; } inst->alg.cra_type->free(inst); } |
6bfd48096 [CRYPTO] api: Add... |
80 81 82 83 |
static void crypto_destroy_instance(struct crypto_alg *alg) { struct crypto_instance *inst = (void *)alg; struct crypto_template *tmpl = inst->tmpl; |
319382a69 crypto: api - Add... |
84 |
crypto_free_instance(inst); |
6bfd48096 [CRYPTO] api: Add... |
85 86 |
crypto_tmpl_put(tmpl); } |
2bf290166 crypto: api - Do ... |
87 88 89 90 91 92 |
static struct list_head *crypto_more_spawns(struct crypto_alg *alg, struct list_head *stack, struct list_head *top, struct list_head *secondary_spawns) { struct crypto_spawn *spawn, *n; |
304e4818d crypto: api - use... |
93 94 |
spawn = list_first_entry_or_null(stack, struct crypto_spawn, list); if (!spawn) |
2bf290166 crypto: api - Do ... |
95 |
return NULL; |
304e4818d crypto: api - use... |
96 |
n = list_next_entry(spawn, list); |
2bf290166 crypto: api - Do ... |
97 98 99 |
if (spawn->alg && &n->list != stack && !n->alg) n->alg = (n->list.next == stack) ? alg : |
304e4818d crypto: api - use... |
100 |
&list_next_entry(n, list)->inst->alg; |
2bf290166 crypto: api - Do ... |
101 102 103 104 105 |
list_move(&spawn->list, secondary_spawns); return &n->list == stack ? top : &n->inst->alg.cra_users; } |
1f7237109 crypto: api - Fix... |
106 107 |
static void crypto_remove_instance(struct crypto_instance *inst, struct list_head *list) |
6bfd48096 [CRYPTO] api: Add... |
108 |
{ |
a73e69965 [CRYPTO] api: Do ... |
109 |
struct crypto_template *tmpl = inst->tmpl; |
6bfd48096 [CRYPTO] api: Add... |
110 |
|
a73e69965 [CRYPTO] api: Do ... |
111 112 |
if (crypto_is_dead(&inst->alg)) return; |
6bfd48096 [CRYPTO] api: Add... |
113 |
|
a73e69965 [CRYPTO] api: Do ... |
114 |
inst->alg.cra_flags |= CRYPTO_ALG_DEAD; |
38cb2419f [CRYPTO] api: Fix... |
115 116 |
if (hlist_unhashed(&inst->list)) return; |
a73e69965 [CRYPTO] api: Do ... |
117 118 |
if (!tmpl || !crypto_tmpl_get(tmpl)) return; |
a73e69965 [CRYPTO] api: Do ... |
119 120 121 |
list_move(&inst->alg.cra_list, list); hlist_del(&inst->list); inst->alg.cra_destroy = crypto_destroy_instance; |
2bf290166 crypto: api - Do ... |
122 |
BUG_ON(!list_empty(&inst->alg.cra_users)); |
a73e69965 [CRYPTO] api: Do ... |
123 |
} |
89b596ba2 crypto: Export cr... |
124 125 |
void crypto_remove_spawns(struct crypto_alg *alg, struct list_head *list, struct crypto_alg *nalg) |
a73e69965 [CRYPTO] api: Do ... |
126 |
{ |
2bf290166 crypto: api - Do ... |
127 |
u32 new_type = (nalg ?: alg)->cra_flags; |
a73e69965 [CRYPTO] api: Do ... |
128 129 |
struct crypto_spawn *spawn, *n; LIST_HEAD(secondary_spawns); |
2bf290166 crypto: api - Do ... |
130 131 132 |
struct list_head *spawns; LIST_HEAD(stack); LIST_HEAD(top); |
6bfd48096 [CRYPTO] api: Add... |
133 |
|
2bf290166 crypto: api - Do ... |
134 |
spawns = &alg->cra_users; |
a73e69965 [CRYPTO] api: Do ... |
135 136 |
list_for_each_entry_safe(spawn, n, spawns, list) { if ((spawn->alg->cra_flags ^ new_type) & spawn->mask) |
6bfd48096 [CRYPTO] api: Add... |
137 |
continue; |
2bf290166 crypto: api - Do ... |
138 |
list_move(&spawn->list, &top); |
a73e69965 [CRYPTO] api: Do ... |
139 |
} |
6bfd48096 [CRYPTO] api: Add... |
140 |
|
2bf290166 crypto: api - Do ... |
141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 |
spawns = ⊤ do { while (!list_empty(spawns)) { struct crypto_instance *inst; spawn = list_first_entry(spawns, struct crypto_spawn, list); inst = spawn->inst; BUG_ON(&inst->alg == alg); list_move(&spawn->list, &stack); if (&inst->alg == nalg) break; spawn->alg = NULL; spawns = &inst->alg.cra_users; |
9a0067421 crypto: algapi - ... |
159 160 161 162 163 164 165 166 167 168 169 170 |
/* * We may encounter an unregistered instance here, since * an instance's spawns are set up prior to the instance * being registered. An unregistered instance will have * NULL ->cra_users.next, since ->cra_users isn't * properly initialized until registration. But an * unregistered instance cannot have any users, so treat * it the same as ->cra_users being empty. */ if (spawns->next == NULL) break; |
2bf290166 crypto: api - Do ... |
171 172 173 174 175 176 177 178 |
} } while ((spawns = crypto_more_spawns(alg, &stack, &top, &secondary_spawns))); list_for_each_entry_safe(spawn, n, &secondary_spawns, list) { if (spawn->alg) list_move(&spawn->list, &spawn->alg->cra_users); else |
1f7237109 crypto: api - Fix... |
179 |
crypto_remove_instance(spawn->inst, list); |
6bfd48096 [CRYPTO] api: Add... |
180 181 |
} } |
89b596ba2 crypto: Export cr... |
182 |
EXPORT_SYMBOL_GPL(crypto_remove_spawns); |
6bfd48096 [CRYPTO] api: Add... |
183 |
|
73d3864a4 crypto: api - Use... |
184 |
static struct crypto_larval *__crypto_register_alg(struct crypto_alg *alg) |
4cc7720cd [CRYPTO] api: Add... |
185 186 |
{ struct crypto_alg *q; |
73d3864a4 crypto: api - Use... |
187 |
struct crypto_larval *larval; |
6bfd48096 [CRYPTO] api: Add... |
188 189 190 |
int ret = -EAGAIN; if (crypto_is_dead(alg)) |
73d3864a4 crypto: api - Use... |
191 |
goto err; |
6bfd48096 [CRYPTO] api: Add... |
192 193 |
INIT_LIST_HEAD(&alg->cra_users); |
73d3864a4 crypto: api - Use... |
194 195 |
/* No cheating! */ alg->cra_flags &= ~CRYPTO_ALG_TESTED; |
6bfd48096 [CRYPTO] api: Add... |
196 |
ret = -EEXIST; |
4cc7720cd [CRYPTO] api: Add... |
197 |
|
cce9e06d1 [CRYPTO] api: Spl... |
198 |
list_for_each_entry(q, &crypto_alg_list, cra_list) { |
4cc7720cd [CRYPTO] api: Add... |
199 |
if (q == alg) |
73d3864a4 crypto: api - Use... |
200 |
goto err; |
b8e15992b crypto: api - Fix... |
201 202 |
if (crypto_is_moribund(q)) continue; |
73d3864a4 crypto: api - Use... |
203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 |
if (crypto_is_larval(q)) { if (!strcmp(alg->cra_driver_name, q->cra_driver_name)) goto err; continue; } if (!strcmp(q->cra_driver_name, alg->cra_name) || !strcmp(q->cra_name, alg->cra_driver_name)) goto err; } larval = crypto_larval_alloc(alg->cra_name, alg->cra_flags | CRYPTO_ALG_TESTED, 0); if (IS_ERR(larval)) goto out; ret = -ENOENT; larval->adult = crypto_mod_get(alg); if (!larval->adult) goto free_larval; |
ce8614a31 crypto: algapi - ... |
223 |
refcount_set(&larval->alg.cra_refcnt, 1); |
73d3864a4 crypto: api - Use... |
224 225 226 227 228 229 |
memcpy(larval->alg.cra_driver_name, alg->cra_driver_name, CRYPTO_MAX_ALG_NAME); larval->alg.cra_priority = alg->cra_priority; list_add(&alg->cra_list, &crypto_alg_list); list_add(&larval->alg.cra_list, &crypto_alg_list); |
5357c6c43 crypto: algapi - ... |
230 |
out: |
73d3864a4 crypto: api - Use... |
231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 |
return larval; free_larval: kfree(larval); err: larval = ERR_PTR(ret); goto out; } void crypto_alg_tested(const char *name, int err) { struct crypto_larval *test; struct crypto_alg *alg; struct crypto_alg *q; LIST_HEAD(list); down_write(&crypto_alg_sem); list_for_each_entry(q, &crypto_alg_list, cra_list) { |
b8e15992b crypto: api - Fix... |
249 |
if (crypto_is_moribund(q) || !crypto_is_larval(q)) |
73d3864a4 crypto: api - Use... |
250 251 252 253 254 255 256 |
continue; test = (struct crypto_larval *)q; if (!strcmp(q->cra_driver_name, name)) goto found; } |
c72358571 crypto: algapi - ... |
257 258 |
pr_err("alg: Unexpected test result for %s: %d ", name, err); |
73d3864a4 crypto: api - Use... |
259 260 261 |
goto unlock; found: |
b8e15992b crypto: api - Fix... |
262 |
q->cra_flags |= CRYPTO_ALG_DEAD; |
73d3864a4 crypto: api - Use... |
263 264 265 266 267 268 269 270 271 |
alg = test->adult; if (err || list_empty(&alg->cra_list)) goto complete; alg->cra_flags |= CRYPTO_ALG_TESTED; list_for_each_entry(q, &crypto_alg_list, cra_list) { if (q == alg) continue; |
6bfd48096 [CRYPTO] api: Add... |
272 273 274 275 276 |
if (crypto_is_moribund(q)) continue; if (crypto_is_larval(q)) { |
2825982d9 [CRYPTO] api: Add... |
277 |
struct crypto_larval *larval = (void *)q; |
d8058480b [CRYPTO] api: Exp... |
278 279 280 281 282 |
/* * Check to see if either our generic name or * specific name can satisfy the name requested * by the larval entry q. */ |
6bfd48096 [CRYPTO] api: Add... |
283 284 285 286 287 288 |
if (strcmp(alg->cra_name, q->cra_name) && strcmp(alg->cra_driver_name, q->cra_name)) continue; if (larval->adult) continue; |
492e2b63e [CRYPTO] api: All... |
289 290 |
if ((q->cra_flags ^ alg->cra_flags) & larval->mask) continue; |
2825982d9 [CRYPTO] api: Add... |
291 292 |
if (!crypto_mod_get(alg)) continue; |
6bfd48096 [CRYPTO] api: Add... |
293 |
|
2825982d9 [CRYPTO] api: Add... |
294 |
larval->adult = alg; |
6bfd48096 [CRYPTO] api: Add... |
295 |
continue; |
2825982d9 [CRYPTO] api: Add... |
296 |
} |
6bfd48096 [CRYPTO] api: Add... |
297 298 299 300 301 302 303 |
if (strcmp(alg->cra_name, q->cra_name)) continue; if (strcmp(alg->cra_driver_name, q->cra_driver_name) && q->cra_priority > alg->cra_priority) continue; |
2bf290166 crypto: api - Do ... |
304 |
crypto_remove_spawns(q, &list, alg); |
cce9e06d1 [CRYPTO] api: Spl... |
305 |
} |
2825982d9 [CRYPTO] api: Add... |
306 |
|
73d3864a4 crypto: api - Use... |
307 308 |
complete: complete_all(&test->completion); |
2825982d9 [CRYPTO] api: Add... |
309 |
|
73d3864a4 crypto: api - Use... |
310 311 312 313 |
unlock: up_write(&crypto_alg_sem); crypto_remove_final(&list); |
cce9e06d1 [CRYPTO] api: Spl... |
314 |
} |
73d3864a4 crypto: api - Use... |
315 |
EXPORT_SYMBOL_GPL(crypto_alg_tested); |
4cc7720cd [CRYPTO] api: Add... |
316 |
|
22e5b20be crypto: Export cr... |
317 |
void crypto_remove_final(struct list_head *list) |
6bfd48096 [CRYPTO] api: Add... |
318 319 320 321 322 323 324 325 326 |
{ struct crypto_alg *alg; struct crypto_alg *n; list_for_each_entry_safe(alg, n, list, cra_list) { list_del_init(&alg->cra_list); crypto_alg_put(alg); } } |
22e5b20be crypto: Export cr... |
327 |
EXPORT_SYMBOL_GPL(crypto_remove_final); |
6bfd48096 [CRYPTO] api: Add... |
328 |
|
73d3864a4 crypto: api - Use... |
329 330 331 332 333 334 335 336 337 338 |
static void crypto_wait_for_test(struct crypto_larval *larval) { int err; err = crypto_probing_notify(CRYPTO_MSG_ALG_REGISTER, larval->adult); if (err != NOTIFY_STOP) { if (WARN_ON(err != NOTIFY_DONE)) goto out; crypto_alg_tested(larval->alg.cra_driver_name, 0); } |
3fc89adb9 crypto: api - Onl... |
339 |
err = wait_for_completion_killable(&larval->completion); |
73d3864a4 crypto: api - Use... |
340 341 342 343 344 |
WARN_ON(err); out: crypto_larval_kill(&larval->alg); } |
4cc7720cd [CRYPTO] api: Add... |
345 346 |
int crypto_register_alg(struct crypto_alg *alg) { |
73d3864a4 crypto: api - Use... |
347 |
struct crypto_larval *larval; |
4cc7720cd [CRYPTO] api: Add... |
348 |
int err; |
d6040764a crypto: api - Cle... |
349 |
alg->cra_flags &= ~CRYPTO_ALG_DEAD; |
4cc7720cd [CRYPTO] api: Add... |
350 351 352 353 354 |
err = crypto_check_alg(alg); if (err) return err; down_write(&crypto_alg_sem); |
73d3864a4 crypto: api - Use... |
355 |
larval = __crypto_register_alg(alg); |
4cc7720cd [CRYPTO] api: Add... |
356 |
up_write(&crypto_alg_sem); |
73d3864a4 crypto: api - Use... |
357 358 359 360 361 |
if (IS_ERR(larval)) return PTR_ERR(larval); crypto_wait_for_test(larval); return 0; |
4cc7720cd [CRYPTO] api: Add... |
362 |
} |
cce9e06d1 [CRYPTO] api: Spl... |
363 |
EXPORT_SYMBOL_GPL(crypto_register_alg); |
6bfd48096 [CRYPTO] api: Add... |
364 365 366 367 368 369 |
static int crypto_remove_alg(struct crypto_alg *alg, struct list_head *list) { if (unlikely(list_empty(&alg->cra_list))) return -ENOENT; alg->cra_flags |= CRYPTO_ALG_DEAD; |
6bfd48096 [CRYPTO] api: Add... |
370 |
list_del_init(&alg->cra_list); |
2bf290166 crypto: api - Do ... |
371 |
crypto_remove_spawns(alg, list, NULL); |
6bfd48096 [CRYPTO] api: Add... |
372 373 374 |
return 0; } |
cce9e06d1 [CRYPTO] api: Spl... |
375 376 |
int crypto_unregister_alg(struct crypto_alg *alg) { |
6bfd48096 [CRYPTO] api: Add... |
377 378 |
int ret; LIST_HEAD(list); |
5357c6c43 crypto: algapi - ... |
379 |
|
cce9e06d1 [CRYPTO] api: Spl... |
380 |
down_write(&crypto_alg_sem); |
6bfd48096 [CRYPTO] api: Add... |
381 |
ret = crypto_remove_alg(alg, &list); |
cce9e06d1 [CRYPTO] api: Spl... |
382 383 384 385 |
up_write(&crypto_alg_sem); if (ret) return ret; |
ce8614a31 crypto: algapi - ... |
386 |
BUG_ON(refcount_read(&alg->cra_refcnt) != 1); |
cce9e06d1 [CRYPTO] api: Spl... |
387 388 |
if (alg->cra_destroy) alg->cra_destroy(alg); |
6bfd48096 [CRYPTO] api: Add... |
389 |
crypto_remove_final(&list); |
cce9e06d1 [CRYPTO] api: Spl... |
390 391 392 |
return 0; } EXPORT_SYMBOL_GPL(crypto_unregister_alg); |
4b004346f crypto: Add bulk ... |
393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 |
int crypto_register_algs(struct crypto_alg *algs, int count) { int i, ret; for (i = 0; i < count; i++) { ret = crypto_register_alg(&algs[i]); if (ret) goto err; } return 0; err: for (--i; i >= 0; --i) crypto_unregister_alg(&algs[i]); return ret; } EXPORT_SYMBOL_GPL(crypto_register_algs); int crypto_unregister_algs(struct crypto_alg *algs, int count) { int i, ret; for (i = 0; i < count; i++) { ret = crypto_unregister_alg(&algs[i]); if (ret) pr_err("Failed to unregister %s %s: %d ", algs[i].cra_driver_name, algs[i].cra_name, ret); } return 0; } EXPORT_SYMBOL_GPL(crypto_unregister_algs); |
4cc7720cd [CRYPTO] api: Add... |
428 429 430 431 432 433 |
int crypto_register_template(struct crypto_template *tmpl) { struct crypto_template *q; int err = -EEXIST; down_write(&crypto_alg_sem); |
002c77a48 crypto: fips - on... |
434 |
crypto_check_module_sig(tmpl->module); |
4cc7720cd [CRYPTO] api: Add... |
435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 |
list_for_each_entry(q, &crypto_template_list, list) { if (q == tmpl) goto out; } list_add(&tmpl->list, &crypto_template_list); err = 0; out: up_write(&crypto_alg_sem); return err; } EXPORT_SYMBOL_GPL(crypto_register_template); void crypto_unregister_template(struct crypto_template *tmpl) { struct crypto_instance *inst; |
b67bfe0d4 hlist: drop the n... |
451 |
struct hlist_node *n; |
4cc7720cd [CRYPTO] api: Add... |
452 |
struct hlist_head *list; |
6bfd48096 [CRYPTO] api: Add... |
453 |
LIST_HEAD(users); |
4cc7720cd [CRYPTO] api: Add... |
454 455 456 457 458 459 460 |
down_write(&crypto_alg_sem); BUG_ON(list_empty(&tmpl->list)); list_del_init(&tmpl->list); list = &tmpl->instances; |
b67bfe0d4 hlist: drop the n... |
461 |
hlist_for_each_entry(inst, list, list) { |
6bfd48096 [CRYPTO] api: Add... |
462 |
int err = crypto_remove_alg(&inst->alg, &users); |
0efcb8d5b crypto: api - fix... |
463 |
|
6bfd48096 [CRYPTO] api: Add... |
464 |
BUG_ON(err); |
4cc7720cd [CRYPTO] api: Add... |
465 466 467 |
} up_write(&crypto_alg_sem); |
b67bfe0d4 hlist: drop the n... |
468 |
hlist_for_each_entry_safe(inst, n, list, list) { |
ce8614a31 crypto: algapi - ... |
469 |
BUG_ON(refcount_read(&inst->alg.cra_refcnt) != 1); |
319382a69 crypto: api - Add... |
470 |
crypto_free_instance(inst); |
4cc7720cd [CRYPTO] api: Add... |
471 |
} |
6bfd48096 [CRYPTO] api: Add... |
472 |
crypto_remove_final(&users); |
4cc7720cd [CRYPTO] api: Add... |
473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 |
} EXPORT_SYMBOL_GPL(crypto_unregister_template); static struct crypto_template *__crypto_lookup_template(const char *name) { struct crypto_template *q, *tmpl = NULL; down_read(&crypto_alg_sem); list_for_each_entry(q, &crypto_template_list, list) { if (strcmp(q->name, name)) continue; if (unlikely(!crypto_tmpl_get(q))) continue; tmpl = q; break; } up_read(&crypto_alg_sem); return tmpl; } struct crypto_template *crypto_lookup_template(const char *name) { |
4943ba16b crypto: include c... |
497 498 |
return try_then_request_module(__crypto_lookup_template(name), "crypto-%s", name); |
4cc7720cd [CRYPTO] api: Add... |
499 500 501 502 503 504 |
} EXPORT_SYMBOL_GPL(crypto_lookup_template); int crypto_register_instance(struct crypto_template *tmpl, struct crypto_instance *inst) { |
73d3864a4 crypto: api - Use... |
505 506 |
struct crypto_larval *larval; int err; |
4cc7720cd [CRYPTO] api: Add... |
507 |
|
4cc7720cd [CRYPTO] api: Add... |
508 509 |
err = crypto_check_alg(&inst->alg); if (err) |
9c521a200 crypto: api - rem... |
510 |
return err; |
4cc7720cd [CRYPTO] api: Add... |
511 |
inst->alg.cra_module = tmpl->module; |
64a947b13 crypto: Add a fla... |
512 |
inst->alg.cra_flags |= CRYPTO_ALG_INSTANCE; |
4cc7720cd [CRYPTO] api: Add... |
513 514 |
down_write(&crypto_alg_sem); |
73d3864a4 crypto: api - Use... |
515 516 |
larval = __crypto_register_alg(&inst->alg); if (IS_ERR(larval)) |
4cc7720cd [CRYPTO] api: Add... |
517 518 519 520 521 522 523 |
goto unlock; hlist_add_head(&inst->list, &tmpl->instances); inst->tmpl = tmpl; unlock: up_write(&crypto_alg_sem); |
73d3864a4 crypto: api - Use... |
524 525 526 527 528 529 |
err = PTR_ERR(larval); if (IS_ERR(larval)) goto err; crypto_wait_for_test(larval); err = 0; |
6bfd48096 [CRYPTO] api: Add... |
530 |
|
4cc7720cd [CRYPTO] api: Add... |
531 532 533 534 |
err: return err; } EXPORT_SYMBOL_GPL(crypto_register_instance); |
ce3fd840f crypto: Unlink an... |
535 |
|
87b167563 crypto: api - Cha... |
536 |
int crypto_unregister_instance(struct crypto_instance *inst) |
ce3fd840f crypto: Unlink an... |
537 |
{ |
1f7237109 crypto: api - Fix... |
538 |
LIST_HEAD(list); |
ce3fd840f crypto: Unlink an... |
539 |
|
ce3fd840f crypto: Unlink an... |
540 |
down_write(&crypto_alg_sem); |
87b167563 crypto: api - Cha... |
541 |
crypto_remove_spawns(&inst->alg, &list, NULL); |
1f7237109 crypto: api - Fix... |
542 |
crypto_remove_instance(inst, &list); |
ce3fd840f crypto: Unlink an... |
543 544 |
up_write(&crypto_alg_sem); |
1f7237109 crypto: api - Fix... |
545 |
crypto_remove_final(&list); |
ce3fd840f crypto: Unlink an... |
546 547 548 549 |
return 0; } EXPORT_SYMBOL_GPL(crypto_unregister_instance); |
4cc7720cd [CRYPTO] api: Add... |
550 |
|
6bfd48096 [CRYPTO] api: Add... |
551 |
int crypto_init_spawn(struct crypto_spawn *spawn, struct crypto_alg *alg, |
a73e69965 [CRYPTO] api: Do ... |
552 |
struct crypto_instance *inst, u32 mask) |
6bfd48096 [CRYPTO] api: Add... |
553 554 555 556 |
{ int err = -EAGAIN; spawn->inst = inst; |
a73e69965 [CRYPTO] api: Do ... |
557 |
spawn->mask = mask; |
6bfd48096 [CRYPTO] api: Add... |
558 559 560 561 562 563 564 565 566 567 568 569 |
down_write(&crypto_alg_sem); if (!crypto_is_moribund(alg)) { list_add(&spawn->list, &alg->cra_users); spawn->alg = alg; err = 0; } up_write(&crypto_alg_sem); return err; } EXPORT_SYMBOL_GPL(crypto_init_spawn); |
97eedce1a crypto: api - Add... |
570 571 572 573 574 |
int crypto_init_spawn2(struct crypto_spawn *spawn, struct crypto_alg *alg, struct crypto_instance *inst, const struct crypto_type *frontend) { int err = -EINVAL; |
c614e109c crypto: algapi - ... |
575 |
if ((alg->cra_flags ^ frontend->type) & frontend->maskset) |
97eedce1a crypto: api - Add... |
576 577 578 579 580 581 582 583 584 |
goto out; spawn->frontend = frontend; err = crypto_init_spawn(spawn, alg, inst, frontend->maskset); out: return err; } EXPORT_SYMBOL_GPL(crypto_init_spawn2); |
d6ef2f198 crypto: api - Add... |
585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 |
int crypto_grab_spawn(struct crypto_spawn *spawn, const char *name, u32 type, u32 mask) { struct crypto_alg *alg; int err; alg = crypto_find_alg(name, spawn->frontend, type, mask); if (IS_ERR(alg)) return PTR_ERR(alg); err = crypto_init_spawn(spawn, alg, spawn->inst, mask); crypto_mod_put(alg); return err; } EXPORT_SYMBOL_GPL(crypto_grab_spawn); |
6bfd48096 [CRYPTO] api: Add... |
600 601 |
void crypto_drop_spawn(struct crypto_spawn *spawn) { |
7ede5a5ba crypto: api - Fix... |
602 603 |
if (!spawn->alg) return; |
6bfd48096 [CRYPTO] api: Add... |
604 605 606 607 608 |
down_write(&crypto_alg_sem); list_del(&spawn->list); up_write(&crypto_alg_sem); } EXPORT_SYMBOL_GPL(crypto_drop_spawn); |
97eedce1a crypto: api - Add... |
609 |
static struct crypto_alg *crypto_spawn_alg(struct crypto_spawn *spawn) |
6bfd48096 [CRYPTO] api: Add... |
610 611 612 |
{ struct crypto_alg *alg; struct crypto_alg *alg2; |
6bfd48096 [CRYPTO] api: Add... |
613 614 615 616 617 618 619 620 621 622 623 624 625 |
down_read(&crypto_alg_sem); alg = spawn->alg; alg2 = alg; if (alg2) alg2 = crypto_mod_get(alg2); up_read(&crypto_alg_sem); if (!alg2) { if (alg) crypto_shoot_alg(alg); return ERR_PTR(-EAGAIN); } |
97eedce1a crypto: api - Add... |
626 627 628 629 630 631 632 633 634 635 636 637 |
return alg; } struct crypto_tfm *crypto_spawn_tfm(struct crypto_spawn *spawn, u32 type, u32 mask) { struct crypto_alg *alg; struct crypto_tfm *tfm; alg = crypto_spawn_alg(spawn); if (IS_ERR(alg)) return ERR_CAST(alg); |
2e306ee01 [CRYPTO] api: Add... |
638 639 640 |
tfm = ERR_PTR(-EINVAL); if (unlikely((alg->cra_flags ^ type) & mask)) goto out_put_alg; |
27d2a3300 [CRYPTO] api: All... |
641 |
tfm = __crypto_alloc_tfm(alg, type, mask); |
6bfd48096 [CRYPTO] api: Add... |
642 |
if (IS_ERR(tfm)) |
2e306ee01 [CRYPTO] api: Add... |
643 644 645 |
goto out_put_alg; return tfm; |
6bfd48096 [CRYPTO] api: Add... |
646 |
|
2e306ee01 [CRYPTO] api: Add... |
647 648 |
out_put_alg: crypto_mod_put(alg); |
6bfd48096 [CRYPTO] api: Add... |
649 650 651 |
return tfm; } EXPORT_SYMBOL_GPL(crypto_spawn_tfm); |
97eedce1a crypto: api - Add... |
652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 |
void *crypto_spawn_tfm2(struct crypto_spawn *spawn) { struct crypto_alg *alg; struct crypto_tfm *tfm; alg = crypto_spawn_alg(spawn); if (IS_ERR(alg)) return ERR_CAST(alg); tfm = crypto_create_tfm(alg, spawn->frontend); if (IS_ERR(tfm)) goto out_put_alg; return tfm; out_put_alg: crypto_mod_put(alg); return tfm; } EXPORT_SYMBOL_GPL(crypto_spawn_tfm2); |
2825982d9 [CRYPTO] api: Add... |
672 673 674 675 676 677 678 679 680 681 682 |
int crypto_register_notifier(struct notifier_block *nb) { return blocking_notifier_chain_register(&crypto_chain, nb); } EXPORT_SYMBOL_GPL(crypto_register_notifier); int crypto_unregister_notifier(struct notifier_block *nb) { return blocking_notifier_chain_unregister(&crypto_chain, nb); } EXPORT_SYMBOL_GPL(crypto_unregister_notifier); |
ebc610e5b [CRYPTO] template... |
683 |
struct crypto_attr_type *crypto_get_attr_type(struct rtattr **tb) |
7fed0bf27 [CRYPTO] api: Add... |
684 |
{ |
39e1ee011 [CRYPTO] api: Add... |
685 |
struct rtattr *rta = tb[0]; |
ebc610e5b [CRYPTO] template... |
686 687 688 689 690 691 |
struct crypto_attr_type *algt; if (!rta) return ERR_PTR(-ENOENT); if (RTA_PAYLOAD(rta) < sizeof(*algt)) return ERR_PTR(-EINVAL); |
39e1ee011 [CRYPTO] api: Add... |
692 693 |
if (rta->rta_type != CRYPTOA_TYPE) return ERR_PTR(-EINVAL); |
ebc610e5b [CRYPTO] template... |
694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 |
algt = RTA_DATA(rta); return algt; } EXPORT_SYMBOL_GPL(crypto_get_attr_type); int crypto_check_attr_type(struct rtattr **tb, u32 type) { struct crypto_attr_type *algt; algt = crypto_get_attr_type(tb); if (IS_ERR(algt)) return PTR_ERR(algt); if ((algt->type ^ type) & algt->mask) return -EINVAL; return 0; } EXPORT_SYMBOL_GPL(crypto_check_attr_type); |
68b6c7d69 [CRYPTO] api: Add... |
715 |
const char *crypto_attr_alg_name(struct rtattr *rta) |
ebc610e5b [CRYPTO] template... |
716 |
{ |
7fed0bf27 [CRYPTO] api: Add... |
717 |
struct crypto_attr_alg *alga; |
ebc610e5b [CRYPTO] template... |
718 719 720 |
if (!rta) return ERR_PTR(-ENOENT); if (RTA_PAYLOAD(rta) < sizeof(*alga)) |
7fed0bf27 [CRYPTO] api: Add... |
721 |
return ERR_PTR(-EINVAL); |
39e1ee011 [CRYPTO] api: Add... |
722 723 |
if (rta->rta_type != CRYPTOA_ALG) return ERR_PTR(-EINVAL); |
7fed0bf27 [CRYPTO] api: Add... |
724 725 726 |
alga = RTA_DATA(rta); alga->name[CRYPTO_MAX_ALG_NAME - 1] = 0; |
68b6c7d69 [CRYPTO] api: Add... |
727 728 729 |
return alga->name; } EXPORT_SYMBOL_GPL(crypto_attr_alg_name); |
d06854f02 crypto: api - Add... |
730 731 732 |
struct crypto_alg *crypto_attr_alg2(struct rtattr *rta, const struct crypto_type *frontend, u32 type, u32 mask) |
68b6c7d69 [CRYPTO] api: Add... |
733 734 |
{ const char *name; |
68b6c7d69 [CRYPTO] api: Add... |
735 736 |
name = crypto_attr_alg_name(rta); |
68b6c7d69 [CRYPTO] api: Add... |
737 |
if (IS_ERR(name)) |
3e8afe35c crypto: use ERR_CAST |
738 |
return ERR_CAST(name); |
68b6c7d69 [CRYPTO] api: Add... |
739 |
|
d06854f02 crypto: api - Add... |
740 |
return crypto_find_alg(name, frontend, type, mask); |
7fed0bf27 [CRYPTO] api: Add... |
741 |
} |
d06854f02 crypto: api - Add... |
742 |
EXPORT_SYMBOL_GPL(crypto_attr_alg2); |
3c09f17c3 [CRYPTO] aead: Ad... |
743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 |
int crypto_attr_u32(struct rtattr *rta, u32 *num) { struct crypto_attr_u32 *nu32; if (!rta) return -ENOENT; if (RTA_PAYLOAD(rta) < sizeof(*nu32)) return -EINVAL; if (rta->rta_type != CRYPTOA_U32) return -EINVAL; nu32 = RTA_DATA(rta); *num = nu32->num; return 0; } EXPORT_SYMBOL_GPL(crypto_attr_u32); |
7fed0bf27 [CRYPTO] api: Add... |
761 |
|
32f27c745 crypto: api - Add... |
762 763 764 765 766 767 768 769 770 771 772 773 774 775 |
int crypto_inst_setname(struct crypto_instance *inst, const char *name, struct crypto_alg *alg) { if (snprintf(inst->alg.cra_name, CRYPTO_MAX_ALG_NAME, "%s(%s)", name, alg->cra_name) >= CRYPTO_MAX_ALG_NAME) return -ENAMETOOLONG; if (snprintf(inst->alg.cra_driver_name, CRYPTO_MAX_ALG_NAME, "%s(%s)", name, alg->cra_driver_name) >= CRYPTO_MAX_ALG_NAME) return -ENAMETOOLONG; return 0; } EXPORT_SYMBOL_GPL(crypto_inst_setname); |
70ec7bb91 crypto: api - Add... |
776 777 |
void *crypto_alloc_instance2(const char *name, struct crypto_alg *alg, unsigned int head) |
7fed0bf27 [CRYPTO] api: Add... |
778 779 |
{ struct crypto_instance *inst; |
70ec7bb91 crypto: api - Add... |
780 |
char *p; |
7fed0bf27 [CRYPTO] api: Add... |
781 |
int err; |
70ec7bb91 crypto: api - Add... |
782 783 784 |
p = kzalloc(head + sizeof(*inst) + sizeof(struct crypto_spawn), GFP_KERNEL); if (!p) |
7fed0bf27 [CRYPTO] api: Add... |
785 |
return ERR_PTR(-ENOMEM); |
70ec7bb91 crypto: api - Add... |
786 |
inst = (void *)(p + head); |
32f27c745 crypto: api - Add... |
787 788 |
err = crypto_inst_setname(inst, name, alg); if (err) |
7fed0bf27 [CRYPTO] api: Add... |
789 |
goto err_free_inst; |
70ec7bb91 crypto: api - Add... |
790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 |
return p; err_free_inst: kfree(p); return ERR_PTR(err); } EXPORT_SYMBOL_GPL(crypto_alloc_instance2); struct crypto_instance *crypto_alloc_instance(const char *name, struct crypto_alg *alg) { struct crypto_instance *inst; struct crypto_spawn *spawn; int err; inst = crypto_alloc_instance2(name, alg, 0); if (IS_ERR(inst)) goto out; |
7fed0bf27 [CRYPTO] api: Add... |
808 |
spawn = crypto_instance_ctx(inst); |
a73e69965 [CRYPTO] api: Do ... |
809 810 |
err = crypto_init_spawn(spawn, alg, inst, CRYPTO_ALG_TYPE_MASK | CRYPTO_ALG_ASYNC); |
7fed0bf27 [CRYPTO] api: Add... |
811 812 813 814 815 816 817 818 |
if (err) goto err_free_inst; return inst; err_free_inst: kfree(inst); |
70ec7bb91 crypto: api - Add... |
819 820 821 822 |
inst = ERR_PTR(err); out: return inst; |
7fed0bf27 [CRYPTO] api: Add... |
823 824 |
} EXPORT_SYMBOL_GPL(crypto_alloc_instance); |
b5b7f0886 [CRYPTO] api: Add... |
825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 |
void crypto_init_queue(struct crypto_queue *queue, unsigned int max_qlen) { INIT_LIST_HEAD(&queue->list); queue->backlog = &queue->list; queue->qlen = 0; queue->max_qlen = max_qlen; } EXPORT_SYMBOL_GPL(crypto_init_queue); int crypto_enqueue_request(struct crypto_queue *queue, struct crypto_async_request *request) { int err = -EINPROGRESS; if (unlikely(queue->qlen >= queue->max_qlen)) { |
6b80ea389 crypto: change tr... |
840 841 |
if (!(request->flags & CRYPTO_TFM_REQ_MAY_BACKLOG)) { err = -ENOSPC; |
b5b7f0886 [CRYPTO] api: Add... |
842 |
goto out; |
6b80ea389 crypto: change tr... |
843 844 |
} err = -EBUSY; |
b5b7f0886 [CRYPTO] api: Add... |
845 846 847 848 849 850 851 852 853 854 855 |
if (queue->backlog == &queue->list) queue->backlog = &request->list; } queue->qlen++; list_add_tail(&request->list, &queue->list); out: return err; } EXPORT_SYMBOL_GPL(crypto_enqueue_request); |
31d228cc6 crypto: api - Rem... |
856 |
struct crypto_async_request *crypto_dequeue_request(struct crypto_queue *queue) |
b5b7f0886 [CRYPTO] api: Add... |
857 858 859 860 861 862 863 864 865 866 867 868 869 |
{ struct list_head *request; if (unlikely(!queue->qlen)) return NULL; queue->qlen--; if (queue->backlog != &queue->list) queue->backlog = queue->backlog->next; request = queue->list.next; list_del(request); |
31d228cc6 crypto: api - Rem... |
870 |
return list_entry(request, struct crypto_async_request, list); |
b5b7f0886 [CRYPTO] api: Add... |
871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 |
} EXPORT_SYMBOL_GPL(crypto_dequeue_request); int crypto_tfm_in_queue(struct crypto_queue *queue, struct crypto_tfm *tfm) { struct crypto_async_request *req; list_for_each_entry(req, &queue->list, list) { if (req->tfm == tfm) return 1; } return 0; } EXPORT_SYMBOL_GPL(crypto_tfm_in_queue); |
7613636de [CRYPTO] api: Add... |
886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 |
static inline void crypto_inc_byte(u8 *a, unsigned int size) { u8 *b = (a + size); u8 c; for (; size; size--) { c = *--b + 1; *b = c; if (c) break; } } void crypto_inc(u8 *a, unsigned int size) { __be32 *b = (__be32 *)(a + size); u32 c; |
db91af0fb crypto: algapi - ... |
903 |
if (IS_ENABLED(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) || |
27c539aef crypto: algapi - ... |
904 |
IS_ALIGNED((unsigned long)b, __alignof__(*b))) |
db91af0fb crypto: algapi - ... |
905 906 907 |
for (; size >= 4; size -= 4) { c = be32_to_cpu(*--b) + 1; *b = cpu_to_be32(c); |
27c539aef crypto: algapi - ... |
908 |
if (likely(c)) |
db91af0fb crypto: algapi - ... |
909 910 |
return; } |
7613636de [CRYPTO] api: Add... |
911 912 913 914 |
crypto_inc_byte(a, size); } EXPORT_SYMBOL_GPL(crypto_inc); |
a7c391f04 crypto: algapi - ... |
915 |
void __crypto_xor(u8 *dst, const u8 *src1, const u8 *src2, unsigned int len) |
7613636de [CRYPTO] api: Add... |
916 |
{ |
db91af0fb crypto: algapi - ... |
917 918 919 920 |
int relalign = 0; if (!IS_ENABLED(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS)) { int size = sizeof(unsigned long); |
a7c391f04 crypto: algapi - ... |
921 922 923 |
int d = (((unsigned long)dst ^ (unsigned long)src1) | ((unsigned long)dst ^ (unsigned long)src2)) & (size - 1); |
db91af0fb crypto: algapi - ... |
924 925 926 927 928 929 930 931 932 933 |
relalign = d ? 1 << __ffs(d) : size; /* * If we care about alignment, process as many bytes as * needed to advance dst and src to values whose alignments * equal their relative alignment. This will allow us to * process the remainder of the input using optimal strides. */ while (((unsigned long)dst & (relalign - 1)) && len > 0) { |
a7c391f04 crypto: algapi - ... |
934 |
*dst++ = *src1++ ^ *src2++; |
db91af0fb crypto: algapi - ... |
935 936 937 |
len--; } } |
7613636de [CRYPTO] api: Add... |
938 |
|
db91af0fb crypto: algapi - ... |
939 |
while (IS_ENABLED(CONFIG_64BIT) && len >= 8 && !(relalign & 7)) { |
a7c391f04 crypto: algapi - ... |
940 |
*(u64 *)dst = *(u64 *)src1 ^ *(u64 *)src2; |
db91af0fb crypto: algapi - ... |
941 |
dst += 8; |
a7c391f04 crypto: algapi - ... |
942 943 |
src1 += 8; src2 += 8; |
db91af0fb crypto: algapi - ... |
944 945 |
len -= 8; } |
7613636de [CRYPTO] api: Add... |
946 |
|
db91af0fb crypto: algapi - ... |
947 |
while (len >= 4 && !(relalign & 3)) { |
a7c391f04 crypto: algapi - ... |
948 |
*(u32 *)dst = *(u32 *)src1 ^ *(u32 *)src2; |
db91af0fb crypto: algapi - ... |
949 |
dst += 4; |
a7c391f04 crypto: algapi - ... |
950 951 |
src1 += 4; src2 += 4; |
db91af0fb crypto: algapi - ... |
952 953 954 955 |
len -= 4; } while (len >= 2 && !(relalign & 1)) { |
a7c391f04 crypto: algapi - ... |
956 |
*(u16 *)dst = *(u16 *)src1 ^ *(u16 *)src2; |
db91af0fb crypto: algapi - ... |
957 |
dst += 2; |
a7c391f04 crypto: algapi - ... |
958 959 |
src1 += 2; src2 += 2; |
db91af0fb crypto: algapi - ... |
960 961 |
len -= 2; } |
7613636de [CRYPTO] api: Add... |
962 |
|
db91af0fb crypto: algapi - ... |
963 |
while (len--) |
a7c391f04 crypto: algapi - ... |
964 |
*dst++ = *src1++ ^ *src2++; |
7613636de [CRYPTO] api: Add... |
965 |
} |
db91af0fb crypto: algapi - ... |
966 |
EXPORT_SYMBOL_GPL(__crypto_xor); |
7613636de [CRYPTO] api: Add... |
967 |
|
38d214331 crypto: api - Add... |
968 969 |
unsigned int crypto_alg_extsize(struct crypto_alg *alg) { |
c2110f283 crypto: api - Inc... |
970 971 |
return alg->cra_ctxsize + (alg->cra_alignmask & ~(crypto_tfm_ctx_alignment() - 1)); |
38d214331 crypto: api - Add... |
972 973 |
} EXPORT_SYMBOL_GPL(crypto_alg_extsize); |
f2aefdab5 crypto: api - Add... |
974 975 976 977 978 979 980 981 982 983 984 985 986 987 |
int crypto_type_has_alg(const char *name, const struct crypto_type *frontend, u32 type, u32 mask) { int ret = 0; struct crypto_alg *alg = crypto_find_alg(name, frontend, type, mask); if (!IS_ERR(alg)) { crypto_mod_put(alg); ret = 1; } return ret; } EXPORT_SYMBOL_GPL(crypto_type_has_alg); |
cce9e06d1 [CRYPTO] api: Spl... |
988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 |
static int __init crypto_algapi_init(void) { crypto_init_proc(); return 0; } static void __exit crypto_algapi_exit(void) { crypto_exit_proc(); } module_init(crypto_algapi_init); module_exit(crypto_algapi_exit); MODULE_LICENSE("GPL"); MODULE_DESCRIPTION("Cryptographic algorithms API"); |