~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

TOMOYO Linux Cross Reference
Linux/crypto/blkcipher.c

Version: ~ [ linux-5.12-rc7 ] ~ [ linux-5.11.13 ] ~ [ linux-5.10.29 ] ~ [ linux-5.9.16 ] ~ [ linux-5.8.18 ] ~ [ linux-5.7.19 ] ~ [ linux-5.6.19 ] ~ [ linux-5.5.19 ] ~ [ linux-5.4.111 ] ~ [ linux-5.3.18 ] ~ [ linux-5.2.21 ] ~ [ linux-5.1.21 ] ~ [ linux-5.0.21 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.186 ] ~ [ linux-4.18.20 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.230 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.266 ] ~ [ linux-4.8.17 ] ~ [ linux-4.7.10 ] ~ [ linux-4.6.7 ] ~ [ linux-4.5.7 ] ~ [ linux-4.4.266 ] ~ [ linux-4.3.6 ] ~ [ linux-4.2.8 ] ~ [ linux-4.1.52 ] ~ [ linux-4.0.9 ] ~ [ linux-3.18.140 ] ~ [ linux-3.16.85 ] ~ [ linux-3.14.79 ] ~ [ linux-3.12.74 ] ~ [ linux-3.10.108 ] ~ [ linux-2.6.32.71 ] ~ [ linux-2.6.0 ] ~ [ linux-2.4.37.11 ] ~ [ unix-v6-master ] ~ [ ccs-tools-1.8.5 ] ~ [ policy-sample ] ~
Architecture: ~ [ i386 ] ~ [ alpha ] ~ [ m68k ] ~ [ mips ] ~ [ ppc ] ~ [ sparc ] ~ [ sparc64 ] ~

  1 /*
  2  * Block chaining cipher operations.
  3  *
  4  * Generic encrypt/decrypt wrapper for ciphers, handles operations across
  5  * multiple page boundaries by using temporary blocks.  In user context,
  6  * the kernel is given a chance to schedule us once per page.
  7  *
  8  * Copyright (c) 2006 Herbert Xu <herbert@gondor.apana.org.au>
  9  *
 10  * This program is free software; you can redistribute it and/or modify it
 11  * under the terms of the GNU General Public License as published by the Free
 12  * Software Foundation; either version 2 of the License, or (at your option)
 13  * any later version.
 14  *
 15  */
 16 
 17 #include <crypto/aead.h>
 18 #include <crypto/internal/skcipher.h>
 19 #include <crypto/scatterwalk.h>
 20 #include <linux/errno.h>
 21 #include <linux/hardirq.h>
 22 #include <linux/kernel.h>
 23 #include <linux/module.h>
 24 #include <linux/seq_file.h>
 25 #include <linux/slab.h>
 26 #include <linux/string.h>
 27 #include <linux/cryptouser.h>
 28 #include <linux/compiler.h>
 29 #include <net/netlink.h>
 30 
 31 #include "internal.h"
 32 
 33 enum {
 34         BLKCIPHER_WALK_PHYS = 1 << 0,
 35         BLKCIPHER_WALK_SLOW = 1 << 1,
 36         BLKCIPHER_WALK_COPY = 1 << 2,
 37         BLKCIPHER_WALK_DIFF = 1 << 3,
 38 };
 39 
 40 static int blkcipher_walk_next(struct blkcipher_desc *desc,
 41                                struct blkcipher_walk *walk);
 42 static int blkcipher_walk_first(struct blkcipher_desc *desc,
 43                                 struct blkcipher_walk *walk);
 44 
 45 static inline void blkcipher_map_src(struct blkcipher_walk *walk)
 46 {
 47         walk->src.virt.addr = scatterwalk_map(&walk->in);
 48 }
 49 
 50 static inline void blkcipher_map_dst(struct blkcipher_walk *walk)
 51 {
 52         walk->dst.virt.addr = scatterwalk_map(&walk->out);
 53 }
 54 
 55 static inline void blkcipher_unmap_src(struct blkcipher_walk *walk)
 56 {
 57         scatterwalk_unmap(walk->src.virt.addr);
 58 }
 59 
 60 static inline void blkcipher_unmap_dst(struct blkcipher_walk *walk)
 61 {
 62         scatterwalk_unmap(walk->dst.virt.addr);
 63 }
 64 
 65 /* Get a spot of the specified length that does not straddle a page.
 66  * The caller needs to ensure that there is enough space for this operation.
 67  */
 68 static inline u8 *blkcipher_get_spot(u8 *start, unsigned int len)
 69 {
 70         u8 *end_page = (u8 *)(((unsigned long)(start + len - 1)) & PAGE_MASK);
 71         return max(start, end_page);
 72 }
 73 
 74 static inline unsigned int blkcipher_done_slow(struct blkcipher_walk *walk,
 75                                                unsigned int bsize)
 76 {
 77         u8 *addr;
 78 
 79         addr = (u8 *)ALIGN((unsigned long)walk->buffer, walk->alignmask + 1);
 80         addr = blkcipher_get_spot(addr, bsize);
 81         scatterwalk_copychunks(addr, &walk->out, bsize, 1);
 82         return bsize;
 83 }
 84 
 85 static inline unsigned int blkcipher_done_fast(struct blkcipher_walk *walk,
 86                                                unsigned int n)
 87 {
 88         if (walk->flags & BLKCIPHER_WALK_COPY) {
 89                 blkcipher_map_dst(walk);
 90                 memcpy(walk->dst.virt.addr, walk->page, n);
 91                 blkcipher_unmap_dst(walk);
 92         } else if (!(walk->flags & BLKCIPHER_WALK_PHYS)) {
 93                 if (walk->flags & BLKCIPHER_WALK_DIFF)
 94                         blkcipher_unmap_dst(walk);
 95                 blkcipher_unmap_src(walk);
 96         }
 97 
 98         scatterwalk_advance(&walk->in, n);
 99         scatterwalk_advance(&walk->out, n);
100 
101         return n;
102 }
103 
104 int blkcipher_walk_done(struct blkcipher_desc *desc,
105                         struct blkcipher_walk *walk, int err)
106 {
107         unsigned int nbytes = 0;
108 
109         if (likely(err >= 0)) {
110                 unsigned int n = walk->nbytes - err;
111 
112                 if (likely(!(walk->flags & BLKCIPHER_WALK_SLOW)))
113                         n = blkcipher_done_fast(walk, n);
114                 else if (WARN_ON(err)) {
115                         err = -EINVAL;
116                         goto err;
117                 } else
118                         n = blkcipher_done_slow(walk, n);
119 
120                 nbytes = walk->total - n;
121                 err = 0;
122         }
123 
124         scatterwalk_done(&walk->in, 0, nbytes);
125         scatterwalk_done(&walk->out, 1, nbytes);
126 
127 err:
128         walk->total = nbytes;
129         walk->nbytes = nbytes;
130 
131         if (nbytes) {
132                 crypto_yield(desc->flags);
133                 return blkcipher_walk_next(desc, walk);
134         }
135 
136         if (walk->iv != desc->info)
137                 memcpy(desc->info, walk->iv, walk->ivsize);
138         if (walk->buffer != walk->page)
139                 kfree(walk->buffer);
140         if (walk->page)
141                 free_page((unsigned long)walk->page);
142 
143         return err;
144 }
145 EXPORT_SYMBOL_GPL(blkcipher_walk_done);
146 
147 static inline int blkcipher_next_slow(struct blkcipher_desc *desc,
148                                       struct blkcipher_walk *walk,
149                                       unsigned int bsize,
150                                       unsigned int alignmask)
151 {
152         unsigned int n;
153         unsigned aligned_bsize = ALIGN(bsize, alignmask + 1);
154 
155         if (walk->buffer)
156                 goto ok;
157 
158         walk->buffer = walk->page;
159         if (walk->buffer)
160                 goto ok;
161 
162         n = aligned_bsize * 3 - (alignmask + 1) +
163             (alignmask & ~(crypto_tfm_ctx_alignment() - 1));
164         walk->buffer = kmalloc(n, GFP_ATOMIC);
165         if (!walk->buffer)
166                 return blkcipher_walk_done(desc, walk, -ENOMEM);
167 
168 ok:
169         walk->dst.virt.addr = (u8 *)ALIGN((unsigned long)walk->buffer,
170                                           alignmask + 1);
171         walk->dst.virt.addr = blkcipher_get_spot(walk->dst.virt.addr, bsize);
172         walk->src.virt.addr = blkcipher_get_spot(walk->dst.virt.addr +
173                                                  aligned_bsize, bsize);
174 
175         scatterwalk_copychunks(walk->src.virt.addr, &walk->in, bsize, 0);
176 
177         walk->nbytes = bsize;
178         walk->flags |= BLKCIPHER_WALK_SLOW;
179 
180         return 0;
181 }
182 
183 static inline int blkcipher_next_copy(struct blkcipher_walk *walk)
184 {
185         u8 *tmp = walk->page;
186 
187         blkcipher_map_src(walk);
188         memcpy(tmp, walk->src.virt.addr, walk->nbytes);
189         blkcipher_unmap_src(walk);
190 
191         walk->src.virt.addr = tmp;
192         walk->dst.virt.addr = tmp;
193 
194         return 0;
195 }
196 
197 static inline int blkcipher_next_fast(struct blkcipher_desc *desc,
198                                       struct blkcipher_walk *walk)
199 {
200         unsigned long diff;
201 
202         walk->src.phys.page = scatterwalk_page(&walk->in);
203         walk->src.phys.offset = offset_in_page(walk->in.offset);
204         walk->dst.phys.page = scatterwalk_page(&walk->out);
205         walk->dst.phys.offset = offset_in_page(walk->out.offset);
206 
207         if (walk->flags & BLKCIPHER_WALK_PHYS)
208                 return 0;
209 
210         diff = walk->src.phys.offset - walk->dst.phys.offset;
211         diff |= walk->src.virt.page - walk->dst.virt.page;
212 
213         blkcipher_map_src(walk);
214         walk->dst.virt.addr = walk->src.virt.addr;
215 
216         if (diff) {
217                 walk->flags |= BLKCIPHER_WALK_DIFF;
218                 blkcipher_map_dst(walk);
219         }
220 
221         return 0;
222 }
223 
224 static int blkcipher_walk_next(struct blkcipher_desc *desc,
225                                struct blkcipher_walk *walk)
226 {
227         unsigned int bsize;
228         unsigned int n;
229         int err;
230 
231         n = walk->total;
232         if (unlikely(n < walk->cipher_blocksize)) {
233                 desc->flags |= CRYPTO_TFM_RES_BAD_BLOCK_LEN;
234                 return blkcipher_walk_done(desc, walk, -EINVAL);
235         }
236 
237         bsize = min(walk->walk_blocksize, n);
238 
239         walk->flags &= ~(BLKCIPHER_WALK_SLOW | BLKCIPHER_WALK_COPY |
240                          BLKCIPHER_WALK_DIFF);
241         if (!scatterwalk_aligned(&walk->in, walk->alignmask) ||
242             !scatterwalk_aligned(&walk->out, walk->alignmask)) {
243                 walk->flags |= BLKCIPHER_WALK_COPY;
244                 if (!walk->page) {
245                         walk->page = (void *)__get_free_page(GFP_ATOMIC);
246                         if (!walk->page)
247                                 n = 0;
248                 }
249         }
250 
251         n = scatterwalk_clamp(&walk->in, n);
252         n = scatterwalk_clamp(&walk->out, n);
253 
254         if (unlikely(n < bsize)) {
255                 err = blkcipher_next_slow(desc, walk, bsize, walk->alignmask);
256                 goto set_phys_lowmem;
257         }
258 
259         walk->nbytes = n;
260         if (walk->flags & BLKCIPHER_WALK_COPY) {
261                 err = blkcipher_next_copy(walk);
262                 goto set_phys_lowmem;
263         }
264 
265         return blkcipher_next_fast(desc, walk);
266 
267 set_phys_lowmem:
268         if (walk->flags & BLKCIPHER_WALK_PHYS) {
269                 walk->src.phys.page = virt_to_page(walk->src.virt.addr);
270                 walk->dst.phys.page = virt_to_page(walk->dst.virt.addr);
271                 walk->src.phys.offset &= PAGE_SIZE - 1;
272                 walk->dst.phys.offset &= PAGE_SIZE - 1;
273         }
274         return err;
275 }
276 
277 static inline int blkcipher_copy_iv(struct blkcipher_walk *walk)
278 {
279         unsigned bs = walk->walk_blocksize;
280         unsigned aligned_bs = ALIGN(bs, walk->alignmask + 1);
281         unsigned int size = aligned_bs * 2 +
282                             walk->ivsize + max(aligned_bs, walk->ivsize) -
283                             (walk->alignmask + 1);
284         u8 *iv;
285 
286         size += walk->alignmask & ~(crypto_tfm_ctx_alignment() - 1);
287         walk->buffer = kmalloc(size, GFP_ATOMIC);
288         if (!walk->buffer)
289                 return -ENOMEM;
290 
291         iv = (u8 *)ALIGN((unsigned long)walk->buffer, walk->alignmask + 1);
292         iv = blkcipher_get_spot(iv, bs) + aligned_bs;
293         iv = blkcipher_get_spot(iv, bs) + aligned_bs;
294         iv = blkcipher_get_spot(iv, walk->ivsize);
295 
296         walk->iv = memcpy(iv, walk->iv, walk->ivsize);
297         return 0;
298 }
299 
300 int blkcipher_walk_virt(struct blkcipher_desc *desc,
301                         struct blkcipher_walk *walk)
302 {
303         walk->flags &= ~BLKCIPHER_WALK_PHYS;
304         walk->walk_blocksize = crypto_blkcipher_blocksize(desc->tfm);
305         walk->cipher_blocksize = walk->walk_blocksize;
306         walk->ivsize = crypto_blkcipher_ivsize(desc->tfm);
307         walk->alignmask = crypto_blkcipher_alignmask(desc->tfm);
308         return blkcipher_walk_first(desc, walk);
309 }
310 EXPORT_SYMBOL_GPL(blkcipher_walk_virt);
311 
312 int blkcipher_walk_phys(struct blkcipher_desc *desc,
313                         struct blkcipher_walk *walk)
314 {
315         walk->flags |= BLKCIPHER_WALK_PHYS;
316         walk->walk_blocksize = crypto_blkcipher_blocksize(desc->tfm);
317         walk->cipher_blocksize = walk->walk_blocksize;
318         walk->ivsize = crypto_blkcipher_ivsize(desc->tfm);
319         walk->alignmask = crypto_blkcipher_alignmask(desc->tfm);
320         return blkcipher_walk_first(desc, walk);
321 }
322 EXPORT_SYMBOL_GPL(blkcipher_walk_phys);
323 
324 static int blkcipher_walk_first(struct blkcipher_desc *desc,
325                                 struct blkcipher_walk *walk)
326 {
327         if (WARN_ON_ONCE(in_irq()))
328                 return -EDEADLK;
329 
330         walk->iv = desc->info;
331         walk->nbytes = walk->total;
332         if (unlikely(!walk->total))
333                 return 0;
334 
335         walk->buffer = NULL;
336         if (unlikely(((unsigned long)walk->iv & walk->alignmask))) {
337                 int err = blkcipher_copy_iv(walk);
338                 if (err)
339                         return err;
340         }
341 
342         scatterwalk_start(&walk->in, walk->in.sg);
343         scatterwalk_start(&walk->out, walk->out.sg);
344         walk->page = NULL;
345 
346         return blkcipher_walk_next(desc, walk);
347 }
348 
349 int blkcipher_walk_virt_block(struct blkcipher_desc *desc,
350                               struct blkcipher_walk *walk,
351                               unsigned int blocksize)
352 {
353         walk->flags &= ~BLKCIPHER_WALK_PHYS;
354         walk->walk_blocksize = blocksize;
355         walk->cipher_blocksize = crypto_blkcipher_blocksize(desc->tfm);
356         walk->ivsize = crypto_blkcipher_ivsize(desc->tfm);
357         walk->alignmask = crypto_blkcipher_alignmask(desc->tfm);
358         return blkcipher_walk_first(desc, walk);
359 }
360 EXPORT_SYMBOL_GPL(blkcipher_walk_virt_block);
361 
362 int blkcipher_aead_walk_virt_block(struct blkcipher_desc *desc,
363                                    struct blkcipher_walk *walk,
364                                    struct crypto_aead *tfm,
365                                    unsigned int blocksize)
366 {
367         walk->flags &= ~BLKCIPHER_WALK_PHYS;
368         walk->walk_blocksize = blocksize;
369         walk->cipher_blocksize = crypto_aead_blocksize(tfm);
370         walk->ivsize = crypto_aead_ivsize(tfm);
371         walk->alignmask = crypto_aead_alignmask(tfm);
372         return blkcipher_walk_first(desc, walk);
373 }
374 EXPORT_SYMBOL_GPL(blkcipher_aead_walk_virt_block);
375 
376 static int setkey_unaligned(struct crypto_tfm *tfm, const u8 *key,
377                             unsigned int keylen)
378 {
379         struct blkcipher_alg *cipher = &tfm->__crt_alg->cra_blkcipher;
380         unsigned long alignmask = crypto_tfm_alg_alignmask(tfm);
381         int ret;
382         u8 *buffer, *alignbuffer;
383         unsigned long absize;
384 
385         absize = keylen + alignmask;
386         buffer = kmalloc(absize, GFP_ATOMIC);
387         if (!buffer)
388                 return -ENOMEM;
389 
390         alignbuffer = (u8 *)ALIGN((unsigned long)buffer, alignmask + 1);
391         memcpy(alignbuffer, key, keylen);
392         ret = cipher->setkey(tfm, alignbuffer, keylen);
393         memset(alignbuffer, 0, keylen);
394         kfree(buffer);
395         return ret;
396 }
397 
398 static int setkey(struct crypto_tfm *tfm, const u8 *key, unsigned int keylen)
399 {
400         struct blkcipher_alg *cipher = &tfm->__crt_alg->cra_blkcipher;
401         unsigned long alignmask = crypto_tfm_alg_alignmask(tfm);
402 
403         if (keylen < cipher->min_keysize || keylen > cipher->max_keysize) {
404                 tfm->crt_flags |= CRYPTO_TFM_RES_BAD_KEY_LEN;
405                 return -EINVAL;
406         }
407 
408         if ((unsigned long)key & alignmask)
409                 return setkey_unaligned(tfm, key, keylen);
410 
411         return cipher->setkey(tfm, key, keylen);
412 }
413 
414 static int async_setkey(struct crypto_ablkcipher *tfm, const u8 *key,
415                         unsigned int keylen)
416 {
417         return setkey(crypto_ablkcipher_tfm(tfm), key, keylen);
418 }
419 
420 static int async_encrypt(struct ablkcipher_request *req)
421 {
422         struct crypto_tfm *tfm = req->base.tfm;
423         struct blkcipher_alg *alg = &tfm->__crt_alg->cra_blkcipher;
424         struct blkcipher_desc desc = {
425                 .tfm = __crypto_blkcipher_cast(tfm),
426                 .info = req->info,
427                 .flags = req->base.flags,
428         };
429 
430 
431         return alg->encrypt(&desc, req->dst, req->src, req->nbytes);
432 }
433 
434 static int async_decrypt(struct ablkcipher_request *req)
435 {
436         struct crypto_tfm *tfm = req->base.tfm;
437         struct blkcipher_alg *alg = &tfm->__crt_alg->cra_blkcipher;
438         struct blkcipher_desc desc = {
439                 .tfm = __crypto_blkcipher_cast(tfm),
440                 .info = req->info,
441                 .flags = req->base.flags,
442         };
443 
444         return alg->decrypt(&desc, req->dst, req->src, req->nbytes);
445 }
446 
447 static unsigned int crypto_blkcipher_ctxsize(struct crypto_alg *alg, u32 type,
448                                              u32 mask)
449 {
450         struct blkcipher_alg *cipher = &alg->cra_blkcipher;
451         unsigned int len = alg->cra_ctxsize;
452 
453         if ((mask & CRYPTO_ALG_TYPE_MASK) == CRYPTO_ALG_TYPE_MASK &&
454             cipher->ivsize) {
455                 len = ALIGN(len, (unsigned long)alg->cra_alignmask + 1);
456                 len += cipher->ivsize;
457         }
458 
459         return len;
460 }
461 
462 static int crypto_init_blkcipher_ops_async(struct crypto_tfm *tfm)
463 {
464         struct ablkcipher_tfm *crt = &tfm->crt_ablkcipher;
465         struct blkcipher_alg *alg = &tfm->__crt_alg->cra_blkcipher;
466 
467         crt->setkey = async_setkey;
468         crt->encrypt = async_encrypt;
469         crt->decrypt = async_decrypt;
470         crt->base = __crypto_ablkcipher_cast(tfm);
471         crt->ivsize = alg->ivsize;
472 
473         return 0;
474 }
475 
476 static int crypto_init_blkcipher_ops_sync(struct crypto_tfm *tfm)
477 {
478         struct blkcipher_tfm *crt = &tfm->crt_blkcipher;
479         struct blkcipher_alg *alg = &tfm->__crt_alg->cra_blkcipher;
480         unsigned long align = crypto_tfm_alg_alignmask(tfm) + 1;
481         unsigned long addr;
482 
483         crt->setkey = setkey;
484         crt->encrypt = alg->encrypt;
485         crt->decrypt = alg->decrypt;
486 
487         addr = (unsigned long)crypto_tfm_ctx(tfm);
488         addr = ALIGN(addr, align);
489         addr += ALIGN(tfm->__crt_alg->cra_ctxsize, align);
490         crt->iv = (void *)addr;
491 
492         return 0;
493 }
494 
495 static int crypto_init_blkcipher_ops(struct crypto_tfm *tfm, u32 type, u32 mask)
496 {
497         struct blkcipher_alg *alg = &tfm->__crt_alg->cra_blkcipher;
498 
499         if (alg->ivsize > PAGE_SIZE / 8)
500                 return -EINVAL;
501 
502         if ((mask & CRYPTO_ALG_TYPE_MASK) == CRYPTO_ALG_TYPE_MASK)
503                 return crypto_init_blkcipher_ops_sync(tfm);
504         else
505                 return crypto_init_blkcipher_ops_async(tfm);
506 }
507 
508 #ifdef CONFIG_NET
509 static int crypto_blkcipher_report(struct sk_buff *skb, struct crypto_alg *alg)
510 {
511         struct crypto_report_blkcipher rblkcipher;
512 
513         strncpy(rblkcipher.type, "blkcipher", sizeof(rblkcipher.type));
514         strncpy(rblkcipher.geniv, alg->cra_blkcipher.geniv ?: "<default>",
515                 sizeof(rblkcipher.geniv));
516 
517         rblkcipher.blocksize = alg->cra_blocksize;
518         rblkcipher.min_keysize = alg->cra_blkcipher.min_keysize;
519         rblkcipher.max_keysize = alg->cra_blkcipher.max_keysize;
520         rblkcipher.ivsize = alg->cra_blkcipher.ivsize;
521 
522         if (nla_put(skb, CRYPTOCFGA_REPORT_BLKCIPHER,
523                     sizeof(struct crypto_report_blkcipher), &rblkcipher))
524                 goto nla_put_failure;
525         return 0;
526 
527 nla_put_failure:
528         return -EMSGSIZE;
529 }
530 #else
531 static int crypto_blkcipher_report(struct sk_buff *skb, struct crypto_alg *alg)
532 {
533         return -ENOSYS;
534 }
535 #endif
536 
537 static void crypto_blkcipher_show(struct seq_file *m, struct crypto_alg *alg)
538         __maybe_unused;
539 static void crypto_blkcipher_show(struct seq_file *m, struct crypto_alg *alg)
540 {
541         seq_printf(m, "type         : blkcipher\n");
542         seq_printf(m, "blocksize    : %u\n", alg->cra_blocksize);
543         seq_printf(m, "min keysize  : %u\n", alg->cra_blkcipher.min_keysize);
544         seq_printf(m, "max keysize  : %u\n", alg->cra_blkcipher.max_keysize);
545         seq_printf(m, "ivsize       : %u\n", alg->cra_blkcipher.ivsize);
546         seq_printf(m, "geniv        : %s\n", alg->cra_blkcipher.geniv ?:
547                                              "<default>");
548 }
549 
550 const struct crypto_type crypto_blkcipher_type = {
551         .ctxsize = crypto_blkcipher_ctxsize,
552         .init = crypto_init_blkcipher_ops,
553 #ifdef CONFIG_PROC_FS
554         .show = crypto_blkcipher_show,
555 #endif
556         .report = crypto_blkcipher_report,
557 };
558 EXPORT_SYMBOL_GPL(crypto_blkcipher_type);
559 
560 MODULE_LICENSE("GPL");
561 MODULE_DESCRIPTION("Generic block chaining cipher type");
562 

~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

kernel.org | git.kernel.org | LWN.net | Project Home | Wiki (Japanese) | Wiki (English) | SVN repository | Mail admin

Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.

osdn.jp