Blame view
crypto/ablkcipher.c
17.8 KB
b5b7f0886 [CRYPTO] api: Add... |
1 2 |
/* * Asynchronous block chaining cipher operations. |
c4ede64a6 crypto: ablkciphe... |
3 |
* |
b5b7f0886 [CRYPTO] api: Add... |
4 5 6 7 8 9 10 |
* This is the asynchronous version of blkcipher.c indicating completion * via a callback. * * 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 |
c4ede64a6 crypto: ablkciphe... |
11 |
* Software Foundation; either version 2 of the License, or (at your option) |
b5b7f0886 [CRYPTO] api: Add... |
12 13 14 |
* any later version. * */ |
378f4f51f [CRYPTO] skcipher... |
15 |
#include <crypto/internal/skcipher.h> |
0b67fb65d crypto: skcipher ... |
16 |
#include <linux/cpumask.h> |
378f4f51f [CRYPTO] skcipher... |
17 |
#include <linux/err.h> |
791b4d5f7 [CRYPTO] api: Add... |
18 |
#include <linux/kernel.h> |
b9c55aa47 [CRYPTO] skcipher... |
19 20 |
#include <linux/rtnetlink.h> #include <linux/sched.h> |
791b4d5f7 [CRYPTO] api: Add... |
21 |
#include <linux/slab.h> |
b5b7f0886 [CRYPTO] api: Add... |
22 |
#include <linux/seq_file.h> |
29ffc8764 crypto: Add users... |
23 24 |
#include <linux/cryptouser.h> #include <net/netlink.h> |
b5b7f0886 [CRYPTO] api: Add... |
25 |
|
bf06099db crypto: skcipher ... |
26 |
#include <crypto/scatterwalk.h> |
378f4f51f [CRYPTO] skcipher... |
27 |
#include "internal.h" |
bf06099db crypto: skcipher ... |
28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 |
struct ablkcipher_buffer { struct list_head entry; struct scatter_walk dst; unsigned int len; void *data; }; enum { ABLKCIPHER_WALK_SLOW = 1 << 0, }; static inline void ablkcipher_buffer_write(struct ablkcipher_buffer *p) { scatterwalk_copychunks(p->data, &p->dst, p->len, 1); } void __ablkcipher_walk_complete(struct ablkcipher_walk *walk) { struct ablkcipher_buffer *p, *tmp; list_for_each_entry_safe(p, tmp, &walk->buffers, entry) { ablkcipher_buffer_write(p); list_del(&p->entry); kfree(p); } } EXPORT_SYMBOL_GPL(__ablkcipher_walk_complete); static inline void ablkcipher_queue_write(struct ablkcipher_walk *walk, struct ablkcipher_buffer *p) { p->dst = walk->out; list_add_tail(&p->entry, &walk->buffers); } /* Get a spot of the specified length that does not straddle a page. * The caller needs to ensure that there is enough space for this operation. */ static inline u8 *ablkcipher_get_spot(u8 *start, unsigned int len) { u8 *end_page = (u8 *)(((unsigned long)(start + len - 1)) & PAGE_MASK); return max(start, end_page); } static inline unsigned int ablkcipher_done_slow(struct ablkcipher_walk *walk, unsigned int bsize) { unsigned int n = bsize; for (;;) { unsigned int len_this_page = scatterwalk_pagelen(&walk->out); if (len_this_page > n) len_this_page = n; scatterwalk_advance(&walk->out, n); if (n == len_this_page) break; n -= len_this_page; scatterwalk_start(&walk->out, scatterwalk_sg_next(walk->out.sg)); } return bsize; } static inline unsigned int ablkcipher_done_fast(struct ablkcipher_walk *walk, unsigned int n) { scatterwalk_advance(&walk->in, n); scatterwalk_advance(&walk->out, n); return n; } static int ablkcipher_walk_next(struct ablkcipher_request *req, struct ablkcipher_walk *walk); int ablkcipher_walk_done(struct ablkcipher_request *req, struct ablkcipher_walk *walk, int err) { struct crypto_tfm *tfm = req->base.tfm; unsigned int nbytes = 0; if (likely(err >= 0)) { unsigned int n = walk->nbytes - err; if (likely(!(walk->flags & ABLKCIPHER_WALK_SLOW))) n = ablkcipher_done_fast(walk, n); else if (WARN_ON(err)) { err = -EINVAL; goto err; } else n = ablkcipher_done_slow(walk, n); nbytes = walk->total - n; err = 0; } scatterwalk_done(&walk->in, 0, nbytes); scatterwalk_done(&walk->out, 1, nbytes); err: walk->total = nbytes; walk->nbytes = nbytes; if (nbytes) { crypto_yield(req->base.flags); return ablkcipher_walk_next(req, walk); } if (walk->iv != req->info) memcpy(req->info, walk->iv, tfm->crt_ablkcipher.ivsize); |
33c7c0fb2 crypto: skcipher ... |
139 |
kfree(walk->iv_buffer); |
bf06099db crypto: skcipher ... |
140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 |
return err; } EXPORT_SYMBOL_GPL(ablkcipher_walk_done); static inline int ablkcipher_next_slow(struct ablkcipher_request *req, struct ablkcipher_walk *walk, unsigned int bsize, unsigned int alignmask, void **src_p, void **dst_p) { unsigned aligned_bsize = ALIGN(bsize, alignmask + 1); struct ablkcipher_buffer *p; void *src, *dst, *base; unsigned int n; n = ALIGN(sizeof(struct ablkcipher_buffer), alignmask + 1); n += (aligned_bsize * 3 - (alignmask + 1) + (alignmask & ~(crypto_tfm_ctx_alignment() - 1))); p = kmalloc(n, GFP_ATOMIC); if (!p) |
2716fbf63 crypto: skcipher ... |
162 |
return ablkcipher_walk_done(req, walk, -ENOMEM); |
bf06099db crypto: skcipher ... |
163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 |
base = p + 1; dst = (u8 *)ALIGN((unsigned long)base, alignmask + 1); src = dst = ablkcipher_get_spot(dst, bsize); p->len = bsize; p->data = dst; scatterwalk_copychunks(src, &walk->in, bsize, 0); ablkcipher_queue_write(walk, p); walk->nbytes = bsize; walk->flags |= ABLKCIPHER_WALK_SLOW; *src_p = src; *dst_p = dst; return 0; } static inline int ablkcipher_copy_iv(struct ablkcipher_walk *walk, struct crypto_tfm *tfm, unsigned int alignmask) { unsigned bs = walk->blocksize; unsigned int ivsize = tfm->crt_ablkcipher.ivsize; unsigned aligned_bs = ALIGN(bs, alignmask + 1); unsigned int size = aligned_bs * 2 + ivsize + max(aligned_bs, ivsize) - (alignmask + 1); u8 *iv; size += alignmask & ~(crypto_tfm_ctx_alignment() - 1); walk->iv_buffer = kmalloc(size, GFP_ATOMIC); if (!walk->iv_buffer) return -ENOMEM; iv = (u8 *)ALIGN((unsigned long)walk->iv_buffer, alignmask + 1); iv = ablkcipher_get_spot(iv, bs) + aligned_bs; iv = ablkcipher_get_spot(iv, bs) + aligned_bs; iv = ablkcipher_get_spot(iv, ivsize); walk->iv = memcpy(iv, walk->iv, ivsize); return 0; } static inline int ablkcipher_next_fast(struct ablkcipher_request *req, struct ablkcipher_walk *walk) { walk->src.page = scatterwalk_page(&walk->in); walk->src.offset = offset_in_page(walk->in.offset); walk->dst.page = scatterwalk_page(&walk->out); walk->dst.offset = offset_in_page(walk->out.offset); return 0; } static int ablkcipher_walk_next(struct ablkcipher_request *req, struct ablkcipher_walk *walk) { struct crypto_tfm *tfm = req->base.tfm; unsigned int alignmask, bsize, n; void *src, *dst; int err; alignmask = crypto_tfm_alg_alignmask(tfm); n = walk->total; if (unlikely(n < crypto_tfm_alg_blocksize(tfm))) { req->base.flags |= CRYPTO_TFM_RES_BAD_BLOCK_LEN; return ablkcipher_walk_done(req, walk, -EINVAL); } walk->flags &= ~ABLKCIPHER_WALK_SLOW; src = dst = NULL; bsize = min(walk->blocksize, n); n = scatterwalk_clamp(&walk->in, n); n = scatterwalk_clamp(&walk->out, n); if (n < bsize || !scatterwalk_aligned(&walk->in, alignmask) || !scatterwalk_aligned(&walk->out, alignmask)) { err = ablkcipher_next_slow(req, walk, bsize, alignmask, &src, &dst); goto set_phys_lowmem; } walk->nbytes = n; return ablkcipher_next_fast(req, walk); set_phys_lowmem: if (err >= 0) { walk->src.page = virt_to_page(src); walk->dst.page = virt_to_page(dst); walk->src.offset = ((unsigned long)src & (PAGE_SIZE - 1)); walk->dst.offset = ((unsigned long)dst & (PAGE_SIZE - 1)); } return err; } static int ablkcipher_walk_first(struct ablkcipher_request *req, struct ablkcipher_walk *walk) { struct crypto_tfm *tfm = req->base.tfm; unsigned int alignmask; alignmask = crypto_tfm_alg_alignmask(tfm); if (WARN_ON_ONCE(in_irq())) return -EDEADLK; walk->nbytes = walk->total; if (unlikely(!walk->total)) return 0; walk->iv_buffer = NULL; walk->iv = req->info; if (unlikely(((unsigned long)walk->iv & alignmask))) { int err = ablkcipher_copy_iv(walk, tfm, alignmask); if (err) return err; } scatterwalk_start(&walk->in, walk->in.sg); scatterwalk_start(&walk->out, walk->out.sg); return ablkcipher_walk_next(req, walk); } int ablkcipher_walk_phys(struct ablkcipher_request *req, struct ablkcipher_walk *walk) { walk->blocksize = crypto_tfm_alg_blocksize(req->base.tfm); return ablkcipher_walk_first(req, walk); } EXPORT_SYMBOL_GPL(ablkcipher_walk_phys); |
791b4d5f7 [CRYPTO] api: Add... |
301 302 |
static int setkey_unaligned(struct crypto_ablkcipher *tfm, const u8 *key, unsigned int keylen) |
ca7c39385 [CRYPTO] api: Han... |
303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 |
{ struct ablkcipher_alg *cipher = crypto_ablkcipher_alg(tfm); unsigned long alignmask = crypto_ablkcipher_alignmask(tfm); int ret; u8 *buffer, *alignbuffer; unsigned long absize; absize = keylen + alignmask; buffer = kmalloc(absize, GFP_ATOMIC); if (!buffer) return -ENOMEM; alignbuffer = (u8 *)ALIGN((unsigned long)buffer, alignmask + 1); memcpy(alignbuffer, key, keylen); ret = cipher->setkey(tfm, alignbuffer, keylen); |
068171767 [CRYPTO] api: fix... |
318 |
memset(alignbuffer, 0, keylen); |
ca7c39385 [CRYPTO] api: Han... |
319 320 321 |
kfree(buffer); return ret; } |
b5b7f0886 [CRYPTO] api: Add... |
322 323 324 325 |
static int setkey(struct crypto_ablkcipher *tfm, const u8 *key, unsigned int keylen) { struct ablkcipher_alg *cipher = crypto_ablkcipher_alg(tfm); |
ca7c39385 [CRYPTO] api: Han... |
326 |
unsigned long alignmask = crypto_ablkcipher_alignmask(tfm); |
b5b7f0886 [CRYPTO] api: Add... |
327 328 329 330 331 |
if (keylen < cipher->min_keysize || keylen > cipher->max_keysize) { crypto_ablkcipher_set_flags(tfm, CRYPTO_TFM_RES_BAD_KEY_LEN); return -EINVAL; } |
ca7c39385 [CRYPTO] api: Han... |
332 333 |
if ((unsigned long)key & alignmask) return setkey_unaligned(tfm, key, keylen); |
b5b7f0886 [CRYPTO] api: Add... |
334 335 336 337 338 339 340 341 |
return cipher->setkey(tfm, key, keylen); } static unsigned int crypto_ablkcipher_ctxsize(struct crypto_alg *alg, u32 type, u32 mask) { return alg->cra_ctxsize; } |
b9c55aa47 [CRYPTO] skcipher... |
342 343 344 345 346 347 348 349 350 |
int skcipher_null_givencrypt(struct skcipher_givcrypt_request *req) { return crypto_ablkcipher_encrypt(&req->creq); } int skcipher_null_givdecrypt(struct skcipher_givcrypt_request *req) { return crypto_ablkcipher_decrypt(&req->creq); } |
b5b7f0886 [CRYPTO] api: Add... |
351 352 353 354 355 356 357 358 359 360 361 362 |
static int crypto_init_ablkcipher_ops(struct crypto_tfm *tfm, u32 type, u32 mask) { struct ablkcipher_alg *alg = &tfm->__crt_alg->cra_ablkcipher; struct ablkcipher_tfm *crt = &tfm->crt_ablkcipher; if (alg->ivsize > PAGE_SIZE / 8) return -EINVAL; crt->setkey = setkey; crt->encrypt = alg->encrypt; crt->decrypt = alg->decrypt; |
b9c55aa47 [CRYPTO] skcipher... |
363 364 365 366 |
if (!alg->ivsize) { crt->givencrypt = skcipher_null_givencrypt; crt->givdecrypt = skcipher_null_givdecrypt; } |
ecfc43292 [CRYPTO] skcipher... |
367 |
crt->base = __crypto_ablkcipher_cast(tfm); |
b5b7f0886 [CRYPTO] api: Add... |
368 369 370 371 |
crt->ivsize = alg->ivsize; return 0; } |
3acc84739 crypto: algapi - ... |
372 |
#ifdef CONFIG_NET |
29ffc8764 crypto: Add users... |
373 374 375 |
static int crypto_ablkcipher_report(struct sk_buff *skb, struct crypto_alg *alg) { struct crypto_report_blkcipher rblkcipher; |
9a5467bf7 crypto: user - fi... |
376 377 378 |
strncpy(rblkcipher.type, "ablkcipher", sizeof(rblkcipher.type)); strncpy(rblkcipher.geniv, alg->cra_ablkcipher.geniv ?: "<default>", sizeof(rblkcipher.geniv)); |
29ffc8764 crypto: Add users... |
379 380 381 382 383 |
rblkcipher.blocksize = alg->cra_blocksize; rblkcipher.min_keysize = alg->cra_ablkcipher.min_keysize; rblkcipher.max_keysize = alg->cra_ablkcipher.max_keysize; rblkcipher.ivsize = alg->cra_ablkcipher.ivsize; |
6662df33f crypto: Stop usin... |
384 385 386 |
if (nla_put(skb, CRYPTOCFGA_REPORT_BLKCIPHER, sizeof(struct crypto_report_blkcipher), &rblkcipher)) goto nla_put_failure; |
29ffc8764 crypto: Add users... |
387 388 389 390 391 |
return 0; nla_put_failure: return -EMSGSIZE; } |
3acc84739 crypto: algapi - ... |
392 393 394 395 396 397 |
#else static int crypto_ablkcipher_report(struct sk_buff *skb, struct crypto_alg *alg) { return -ENOSYS; } #endif |
29ffc8764 crypto: Add users... |
398 |
|
b5b7f0886 [CRYPTO] api: Add... |
399 400 401 402 403 404 405 406 |
static void crypto_ablkcipher_show(struct seq_file *m, struct crypto_alg *alg) __attribute__ ((unused)); static void crypto_ablkcipher_show(struct seq_file *m, struct crypto_alg *alg) { struct ablkcipher_alg *ablkcipher = &alg->cra_ablkcipher; seq_printf(m, "type : ablkcipher "); |
189ed66e9 [CRYPTO] api: Sho... |
407 408 409 |
seq_printf(m, "async : %s ", alg->cra_flags & CRYPTO_ALG_ASYNC ? "yes" : "no"); |
b5b7f0886 [CRYPTO] api: Add... |
410 411 412 413 414 415 416 417 |
seq_printf(m, "blocksize : %u ", alg->cra_blocksize); seq_printf(m, "min keysize : %u ", ablkcipher->min_keysize); seq_printf(m, "max keysize : %u ", ablkcipher->max_keysize); seq_printf(m, "ivsize : %u ", ablkcipher->ivsize); |
23508e11a [CRYPTO] skcipher... |
418 419 |
seq_printf(m, "geniv : %s ", ablkcipher->geniv ?: "<default>"); |
b5b7f0886 [CRYPTO] api: Add... |
420 421 422 423 424 425 426 427 |
} const struct crypto_type crypto_ablkcipher_type = { .ctxsize = crypto_ablkcipher_ctxsize, .init = crypto_init_ablkcipher_ops, #ifdef CONFIG_PROC_FS .show = crypto_ablkcipher_show, #endif |
29ffc8764 crypto: Add users... |
428 |
.report = crypto_ablkcipher_report, |
b5b7f0886 [CRYPTO] api: Add... |
429 430 |
}; EXPORT_SYMBOL_GPL(crypto_ablkcipher_type); |
61da88e2b [CRYPTO] skcipher... |
431 432 433 434 435 436 437 438 439 440 441 442 443 |
static int no_givdecrypt(struct skcipher_givcrypt_request *req) { return -ENOSYS; } static int crypto_init_givcipher_ops(struct crypto_tfm *tfm, u32 type, u32 mask) { struct ablkcipher_alg *alg = &tfm->__crt_alg->cra_ablkcipher; struct ablkcipher_tfm *crt = &tfm->crt_ablkcipher; if (alg->ivsize > PAGE_SIZE / 8) return -EINVAL; |
ecfc43292 [CRYPTO] skcipher... |
444 445 |
crt->setkey = tfm->__crt_alg->cra_flags & CRYPTO_ALG_GENIV ? alg->setkey : setkey; |
61da88e2b [CRYPTO] skcipher... |
446 447 448 449 |
crt->encrypt = alg->encrypt; crt->decrypt = alg->decrypt; crt->givencrypt = alg->givencrypt; crt->givdecrypt = alg->givdecrypt ?: no_givdecrypt; |
ecfc43292 [CRYPTO] skcipher... |
450 |
crt->base = __crypto_ablkcipher_cast(tfm); |
61da88e2b [CRYPTO] skcipher... |
451 452 453 454 |
crt->ivsize = alg->ivsize; return 0; } |
3acc84739 crypto: algapi - ... |
455 |
#ifdef CONFIG_NET |
3e29c1095 crypto: Add users... |
456 457 458 |
static int crypto_givcipher_report(struct sk_buff *skb, struct crypto_alg *alg) { struct crypto_report_blkcipher rblkcipher; |
9a5467bf7 crypto: user - fi... |
459 460 461 |
strncpy(rblkcipher.type, "givcipher", sizeof(rblkcipher.type)); strncpy(rblkcipher.geniv, alg->cra_ablkcipher.geniv ?: "<built-in>", sizeof(rblkcipher.geniv)); |
3e29c1095 crypto: Add users... |
462 463 464 465 466 |
rblkcipher.blocksize = alg->cra_blocksize; rblkcipher.min_keysize = alg->cra_ablkcipher.min_keysize; rblkcipher.max_keysize = alg->cra_ablkcipher.max_keysize; rblkcipher.ivsize = alg->cra_ablkcipher.ivsize; |
6662df33f crypto: Stop usin... |
467 468 469 |
if (nla_put(skb, CRYPTOCFGA_REPORT_BLKCIPHER, sizeof(struct crypto_report_blkcipher), &rblkcipher)) goto nla_put_failure; |
3e29c1095 crypto: Add users... |
470 471 472 473 474 |
return 0; nla_put_failure: return -EMSGSIZE; } |
3acc84739 crypto: algapi - ... |
475 476 477 478 479 480 |
#else static int crypto_givcipher_report(struct sk_buff *skb, struct crypto_alg *alg) { return -ENOSYS; } #endif |
3e29c1095 crypto: Add users... |
481 |
|
61da88e2b [CRYPTO] skcipher... |
482 483 484 485 486 487 488 489 |
static void crypto_givcipher_show(struct seq_file *m, struct crypto_alg *alg) __attribute__ ((unused)); static void crypto_givcipher_show(struct seq_file *m, struct crypto_alg *alg) { struct ablkcipher_alg *ablkcipher = &alg->cra_ablkcipher; seq_printf(m, "type : givcipher "); |
189ed66e9 [CRYPTO] api: Sho... |
490 491 492 |
seq_printf(m, "async : %s ", alg->cra_flags & CRYPTO_ALG_ASYNC ? "yes" : "no"); |
61da88e2b [CRYPTO] skcipher... |
493 494 495 496 497 498 499 500 |
seq_printf(m, "blocksize : %u ", alg->cra_blocksize); seq_printf(m, "min keysize : %u ", ablkcipher->min_keysize); seq_printf(m, "max keysize : %u ", ablkcipher->max_keysize); seq_printf(m, "ivsize : %u ", ablkcipher->ivsize); |
23508e11a [CRYPTO] skcipher... |
501 502 |
seq_printf(m, "geniv : %s ", ablkcipher->geniv ?: "<built-in>"); |
61da88e2b [CRYPTO] skcipher... |
503 504 505 506 507 508 509 510 |
} const struct crypto_type crypto_givcipher_type = { .ctxsize = crypto_ablkcipher_ctxsize, .init = crypto_init_givcipher_ops, #ifdef CONFIG_PROC_FS .show = crypto_givcipher_show, #endif |
3e29c1095 crypto: Add users... |
511 |
.report = crypto_givcipher_report, |
61da88e2b [CRYPTO] skcipher... |
512 513 |
}; EXPORT_SYMBOL_GPL(crypto_givcipher_type); |
ecfc43292 [CRYPTO] skcipher... |
514 515 |
const char *crypto_default_geniv(const struct crypto_alg *alg) { |
63b5ac286 crypto: blkcipher... |
516 517 518 519 520 |
if (((alg->cra_flags & CRYPTO_ALG_TYPE_MASK) == CRYPTO_ALG_TYPE_BLKCIPHER ? alg->cra_blkcipher.ivsize : alg->cra_ablkcipher.ivsize) != alg->cra_blocksize) return "chainiv"; |
f3d53ed03 crypto: skcipher ... |
521 |
return "eseqiv"; |
ecfc43292 [CRYPTO] skcipher... |
522 |
} |
b9c55aa47 [CRYPTO] skcipher... |
523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 |
static int crypto_givcipher_default(struct crypto_alg *alg, u32 type, u32 mask) { struct rtattr *tb[3]; struct { struct rtattr attr; struct crypto_attr_type data; } ptype; struct { struct rtattr attr; struct crypto_attr_alg data; } palg; struct crypto_template *tmpl; struct crypto_instance *inst; struct crypto_alg *larval; const char *geniv; int err; larval = crypto_larval_lookup(alg->cra_driver_name, |
435578aea crypto: skcipher ... |
541 |
(type & ~CRYPTO_ALG_TYPE_MASK) | |
b9c55aa47 [CRYPTO] skcipher... |
542 |
CRYPTO_ALG_TYPE_GIVCIPHER, |
435578aea crypto: skcipher ... |
543 |
mask | CRYPTO_ALG_TYPE_MASK); |
b9c55aa47 [CRYPTO] skcipher... |
544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 |
err = PTR_ERR(larval); if (IS_ERR(larval)) goto out; err = -EAGAIN; if (!crypto_is_larval(larval)) goto drop_larval; ptype.attr.rta_len = sizeof(ptype); ptype.attr.rta_type = CRYPTOA_TYPE; ptype.data.type = type | CRYPTO_ALG_GENIV; /* GENIV tells the template that we're making a default geniv. */ ptype.data.mask = mask | CRYPTO_ALG_GENIV; tb[0] = &ptype.attr; palg.attr.rta_len = sizeof(palg); palg.attr.rta_type = CRYPTOA_ALG; /* Must use the exact name to locate ourselves. */ memcpy(palg.data.name, alg->cra_driver_name, CRYPTO_MAX_ALG_NAME); tb[1] = &palg.attr; tb[2] = NULL; if ((alg->cra_flags & CRYPTO_ALG_TYPE_MASK) == CRYPTO_ALG_TYPE_BLKCIPHER) geniv = alg->cra_blkcipher.geniv; else geniv = alg->cra_ablkcipher.geniv; if (!geniv) geniv = crypto_default_geniv(alg); tmpl = crypto_lookup_template(geniv); err = -ENOENT; if (!tmpl) goto kill_larval; inst = tmpl->alloc(tb); err = PTR_ERR(inst); if (IS_ERR(inst)) goto put_tmpl; if ((err = crypto_register_instance(tmpl, inst))) { tmpl->free(inst); goto put_tmpl; } /* Redo the lookup to use the instance we just registered. */ err = -EAGAIN; put_tmpl: crypto_tmpl_put(tmpl); kill_larval: crypto_larval_kill(larval); drop_larval: crypto_mod_put(larval); out: crypto_mod_put(alg); return err; } |
1e1229940 crypto: user - Fi... |
604 |
struct crypto_alg *crypto_lookup_skcipher(const char *name, u32 type, u32 mask) |
b9c55aa47 [CRYPTO] skcipher... |
605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 |
{ struct crypto_alg *alg; alg = crypto_alg_mod_lookup(name, type, mask); if (IS_ERR(alg)) return alg; if ((alg->cra_flags & CRYPTO_ALG_TYPE_MASK) == CRYPTO_ALG_TYPE_GIVCIPHER) return alg; if (!((alg->cra_flags & CRYPTO_ALG_TYPE_MASK) == CRYPTO_ALG_TYPE_BLKCIPHER ? alg->cra_blkcipher.ivsize : alg->cra_ablkcipher.ivsize)) return alg; |
b170a137f crypto: skcipher ... |
620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 |
crypto_mod_put(alg); alg = crypto_alg_mod_lookup(name, type | CRYPTO_ALG_TESTED, mask & ~CRYPTO_ALG_TESTED); if (IS_ERR(alg)) return alg; if ((alg->cra_flags & CRYPTO_ALG_TYPE_MASK) == CRYPTO_ALG_TYPE_GIVCIPHER) { if ((alg->cra_flags ^ type ^ ~mask) & CRYPTO_ALG_TESTED) { crypto_mod_put(alg); alg = ERR_PTR(-ENOENT); } return alg; } BUG_ON(!((alg->cra_flags & CRYPTO_ALG_TYPE_MASK) == CRYPTO_ALG_TYPE_BLKCIPHER ? alg->cra_blkcipher.ivsize : alg->cra_ablkcipher.ivsize)); |
b9c55aa47 [CRYPTO] skcipher... |
638 639 |
return ERR_PTR(crypto_givcipher_default(alg, type, mask)); } |
1e1229940 crypto: user - Fi... |
640 |
EXPORT_SYMBOL_GPL(crypto_lookup_skcipher); |
b9c55aa47 [CRYPTO] skcipher... |
641 |
|
378f4f51f [CRYPTO] skcipher... |
642 643 644 645 646 647 648 649 |
int crypto_grab_skcipher(struct crypto_skcipher_spawn *spawn, const char *name, u32 type, u32 mask) { struct crypto_alg *alg; int err; type = crypto_skcipher_type(type); mask = crypto_skcipher_mask(mask); |
b9c55aa47 [CRYPTO] skcipher... |
650 |
alg = crypto_lookup_skcipher(name, type, mask); |
378f4f51f [CRYPTO] skcipher... |
651 652 653 654 655 656 657 658 |
if (IS_ERR(alg)) return PTR_ERR(alg); err = crypto_init_spawn(&spawn->base, alg, spawn->base.inst, mask); crypto_mod_put(alg); return err; } EXPORT_SYMBOL_GPL(crypto_grab_skcipher); |
b9c55aa47 [CRYPTO] skcipher... |
659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 |
struct crypto_ablkcipher *crypto_alloc_ablkcipher(const char *alg_name, u32 type, u32 mask) { struct crypto_tfm *tfm; int err; type = crypto_skcipher_type(type); mask = crypto_skcipher_mask(mask); for (;;) { struct crypto_alg *alg; alg = crypto_lookup_skcipher(alg_name, type, mask); if (IS_ERR(alg)) { err = PTR_ERR(alg); goto err; } tfm = __crypto_alloc_tfm(alg, type, mask); if (!IS_ERR(tfm)) return __crypto_ablkcipher_cast(tfm); crypto_mod_put(alg); err = PTR_ERR(tfm); err: if (err != -EAGAIN) break; if (signal_pending(current)) { err = -EINTR; break; } } return ERR_PTR(err); } EXPORT_SYMBOL_GPL(crypto_alloc_ablkcipher); |