blob: 59a0936ed8bcd47a22301804ab9125ae84fffe43
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 <net/netlink.h> |
29 | |
30 | #include "internal.h" |
31 | |
32 | enum { |
33 | BLKCIPHER_WALK_PHYS = 1 << 0, |
34 | BLKCIPHER_WALK_SLOW = 1 << 1, |
35 | BLKCIPHER_WALK_COPY = 1 << 2, |
36 | BLKCIPHER_WALK_DIFF = 1 << 3, |
37 | }; |
38 | |
39 | static int blkcipher_walk_next(struct blkcipher_desc *desc, |
40 | struct blkcipher_walk *walk); |
41 | static int blkcipher_walk_first(struct blkcipher_desc *desc, |
42 | struct blkcipher_walk *walk); |
43 | |
44 | static inline void blkcipher_map_src(struct blkcipher_walk *walk) |
45 | { |
46 | walk->src.virt.addr = scatterwalk_map(&walk->in); |
47 | } |
48 | |
49 | static inline void blkcipher_map_dst(struct blkcipher_walk *walk) |
50 | { |
51 | walk->dst.virt.addr = scatterwalk_map(&walk->out); |
52 | } |
53 | |
54 | static inline void blkcipher_unmap_src(struct blkcipher_walk *walk) |
55 | { |
56 | scatterwalk_unmap(walk->src.virt.addr); |
57 | } |
58 | |
59 | static inline void blkcipher_unmap_dst(struct blkcipher_walk *walk) |
60 | { |
61 | scatterwalk_unmap(walk->dst.virt.addr); |
62 | } |
63 | |
64 | /* Get a spot of the specified length that does not straddle a page. |
65 | * The caller needs to ensure that there is enough space for this operation. |
66 | */ |
67 | static inline u8 *blkcipher_get_spot(u8 *start, unsigned int len) |
68 | { |
69 | u8 *end_page = (u8 *)(((unsigned long)(start + len - 1)) & PAGE_MASK); |
70 | return max(start, end_page); |
71 | } |
72 | |
73 | static inline void blkcipher_done_slow(struct blkcipher_walk *walk, |
74 | unsigned int bsize) |
75 | { |
76 | u8 *addr; |
77 | |
78 | addr = (u8 *)ALIGN((unsigned long)walk->buffer, walk->alignmask + 1); |
79 | addr = blkcipher_get_spot(addr, bsize); |
80 | scatterwalk_copychunks(addr, &walk->out, bsize, 1); |
81 | } |
82 | |
83 | static inline void blkcipher_done_fast(struct blkcipher_walk *walk, |
84 | unsigned int n) |
85 | { |
86 | if (walk->flags & BLKCIPHER_WALK_COPY) { |
87 | blkcipher_map_dst(walk); |
88 | memcpy(walk->dst.virt.addr, walk->page, n); |
89 | blkcipher_unmap_dst(walk); |
90 | } else if (!(walk->flags & BLKCIPHER_WALK_PHYS)) { |
91 | if (walk->flags & BLKCIPHER_WALK_DIFF) |
92 | blkcipher_unmap_dst(walk); |
93 | blkcipher_unmap_src(walk); |
94 | } |
95 | |
96 | scatterwalk_advance(&walk->in, n); |
97 | scatterwalk_advance(&walk->out, n); |
98 | } |
99 | |
100 | int blkcipher_walk_done(struct blkcipher_desc *desc, |
101 | struct blkcipher_walk *walk, int err) |
102 | { |
103 | unsigned int n; /* bytes processed */ |
104 | bool more; |
105 | |
106 | if (unlikely(err < 0)) |
107 | goto finish; |
108 | |
109 | n = walk->nbytes - err; |
110 | walk->total -= n; |
111 | more = (walk->total != 0); |
112 | |
113 | if (likely(!(walk->flags & BLKCIPHER_WALK_SLOW))) { |
114 | blkcipher_done_fast(walk, n); |
115 | } else { |
116 | if (WARN_ON(err)) { |
117 | /* unexpected case; didn't process all bytes */ |
118 | err = -EINVAL; |
119 | goto finish; |
120 | } |
121 | blkcipher_done_slow(walk, n); |
122 | } |
123 | |
124 | scatterwalk_done(&walk->in, 0, more); |
125 | scatterwalk_done(&walk->out, 1, more); |
126 | |
127 | if (more) { |
128 | crypto_yield(desc->flags); |
129 | return blkcipher_walk_next(desc, walk); |
130 | } |
131 | err = 0; |
132 | finish: |
133 | walk->nbytes = 0; |
134 | if (walk->iv != desc->info) |
135 | memcpy(desc->info, walk->iv, walk->ivsize); |
136 | if (walk->buffer != walk->page) |
137 | kfree(walk->buffer); |
138 | if (walk->page) |
139 | free_page((unsigned long)walk->page); |
140 | return err; |
141 | } |
142 | EXPORT_SYMBOL_GPL(blkcipher_walk_done); |
143 | |
144 | static inline int blkcipher_next_slow(struct blkcipher_desc *desc, |
145 | struct blkcipher_walk *walk, |
146 | unsigned int bsize, |
147 | unsigned int alignmask) |
148 | { |
149 | unsigned int n; |
150 | unsigned aligned_bsize = ALIGN(bsize, alignmask + 1); |
151 | |
152 | if (walk->buffer) |
153 | goto ok; |
154 | |
155 | walk->buffer = walk->page; |
156 | if (walk->buffer) |
157 | goto ok; |
158 | |
159 | n = aligned_bsize * 3 - (alignmask + 1) + |
160 | (alignmask & ~(crypto_tfm_ctx_alignment() - 1)); |
161 | walk->buffer = kmalloc(n, GFP_ATOMIC); |
162 | if (!walk->buffer) |
163 | return blkcipher_walk_done(desc, walk, -ENOMEM); |
164 | |
165 | ok: |
166 | walk->dst.virt.addr = (u8 *)ALIGN((unsigned long)walk->buffer, |
167 | alignmask + 1); |
168 | walk->dst.virt.addr = blkcipher_get_spot(walk->dst.virt.addr, bsize); |
169 | walk->src.virt.addr = blkcipher_get_spot(walk->dst.virt.addr + |
170 | aligned_bsize, bsize); |
171 | |
172 | scatterwalk_copychunks(walk->src.virt.addr, &walk->in, bsize, 0); |
173 | |
174 | walk->nbytes = bsize; |
175 | walk->flags |= BLKCIPHER_WALK_SLOW; |
176 | |
177 | return 0; |
178 | } |
179 | |
180 | static inline int blkcipher_next_copy(struct blkcipher_walk *walk) |
181 | { |
182 | u8 *tmp = walk->page; |
183 | |
184 | blkcipher_map_src(walk); |
185 | memcpy(tmp, walk->src.virt.addr, walk->nbytes); |
186 | blkcipher_unmap_src(walk); |
187 | |
188 | walk->src.virt.addr = tmp; |
189 | walk->dst.virt.addr = tmp; |
190 | |
191 | return 0; |
192 | } |
193 | |
194 | static inline int blkcipher_next_fast(struct blkcipher_desc *desc, |
195 | struct blkcipher_walk *walk) |
196 | { |
197 | unsigned long diff; |
198 | |
199 | walk->src.phys.page = scatterwalk_page(&walk->in); |
200 | walk->src.phys.offset = offset_in_page(walk->in.offset); |
201 | walk->dst.phys.page = scatterwalk_page(&walk->out); |
202 | walk->dst.phys.offset = offset_in_page(walk->out.offset); |
203 | |
204 | if (walk->flags & BLKCIPHER_WALK_PHYS) |
205 | return 0; |
206 | |
207 | diff = walk->src.phys.offset - walk->dst.phys.offset; |
208 | diff |= walk->src.virt.page - walk->dst.virt.page; |
209 | |
210 | blkcipher_map_src(walk); |
211 | walk->dst.virt.addr = walk->src.virt.addr; |
212 | |
213 | if (diff) { |
214 | walk->flags |= BLKCIPHER_WALK_DIFF; |
215 | blkcipher_map_dst(walk); |
216 | } |
217 | |
218 | return 0; |
219 | } |
220 | |
221 | static int blkcipher_walk_next(struct blkcipher_desc *desc, |
222 | struct blkcipher_walk *walk) |
223 | { |
224 | unsigned int bsize; |
225 | unsigned int n; |
226 | int err; |
227 | |
228 | n = walk->total; |
229 | if (unlikely(n < walk->cipher_blocksize)) { |
230 | desc->flags |= CRYPTO_TFM_RES_BAD_BLOCK_LEN; |
231 | return blkcipher_walk_done(desc, walk, -EINVAL); |
232 | } |
233 | |
234 | bsize = min(walk->walk_blocksize, n); |
235 | |
236 | walk->flags &= ~(BLKCIPHER_WALK_SLOW | BLKCIPHER_WALK_COPY | |
237 | BLKCIPHER_WALK_DIFF); |
238 | if (!scatterwalk_aligned(&walk->in, walk->alignmask) || |
239 | !scatterwalk_aligned(&walk->out, walk->alignmask)) { |
240 | walk->flags |= BLKCIPHER_WALK_COPY; |
241 | if (!walk->page) { |
242 | walk->page = (void *)__get_free_page(GFP_ATOMIC); |
243 | if (!walk->page) |
244 | n = 0; |
245 | } |
246 | } |
247 | |
248 | n = scatterwalk_clamp(&walk->in, n); |
249 | n = scatterwalk_clamp(&walk->out, n); |
250 | |
251 | if (unlikely(n < bsize)) { |
252 | err = blkcipher_next_slow(desc, walk, bsize, walk->alignmask); |
253 | goto set_phys_lowmem; |
254 | } |
255 | |
256 | walk->nbytes = n; |
257 | if (walk->flags & BLKCIPHER_WALK_COPY) { |
258 | err = blkcipher_next_copy(walk); |
259 | goto set_phys_lowmem; |
260 | } |
261 | |
262 | return blkcipher_next_fast(desc, walk); |
263 | |
264 | set_phys_lowmem: |
265 | if (walk->flags & BLKCIPHER_WALK_PHYS) { |
266 | walk->src.phys.page = virt_to_page(walk->src.virt.addr); |
267 | walk->dst.phys.page = virt_to_page(walk->dst.virt.addr); |
268 | walk->src.phys.offset &= PAGE_SIZE - 1; |
269 | walk->dst.phys.offset &= PAGE_SIZE - 1; |
270 | } |
271 | return err; |
272 | } |
273 | |
274 | static inline int blkcipher_copy_iv(struct blkcipher_walk *walk) |
275 | { |
276 | unsigned bs = walk->walk_blocksize; |
277 | unsigned aligned_bs = ALIGN(bs, walk->alignmask + 1); |
278 | unsigned int size = aligned_bs * 2 + |
279 | walk->ivsize + max(aligned_bs, walk->ivsize) - |
280 | (walk->alignmask + 1); |
281 | u8 *iv; |
282 | |
283 | size += walk->alignmask & ~(crypto_tfm_ctx_alignment() - 1); |
284 | walk->buffer = kmalloc(size, GFP_ATOMIC); |
285 | if (!walk->buffer) |
286 | return -ENOMEM; |
287 | |
288 | iv = (u8 *)ALIGN((unsigned long)walk->buffer, walk->alignmask + 1); |
289 | iv = blkcipher_get_spot(iv, bs) + aligned_bs; |
290 | iv = blkcipher_get_spot(iv, bs) + aligned_bs; |
291 | iv = blkcipher_get_spot(iv, walk->ivsize); |
292 | |
293 | walk->iv = memcpy(iv, walk->iv, walk->ivsize); |
294 | return 0; |
295 | } |
296 | |
297 | int blkcipher_walk_virt(struct blkcipher_desc *desc, |
298 | struct blkcipher_walk *walk) |
299 | { |
300 | walk->flags &= ~BLKCIPHER_WALK_PHYS; |
301 | walk->walk_blocksize = crypto_blkcipher_blocksize(desc->tfm); |
302 | walk->cipher_blocksize = walk->walk_blocksize; |
303 | walk->ivsize = crypto_blkcipher_ivsize(desc->tfm); |
304 | walk->alignmask = crypto_blkcipher_alignmask(desc->tfm); |
305 | return blkcipher_walk_first(desc, walk); |
306 | } |
307 | EXPORT_SYMBOL_GPL(blkcipher_walk_virt); |
308 | |
309 | int blkcipher_walk_phys(struct blkcipher_desc *desc, |
310 | struct blkcipher_walk *walk) |
311 | { |
312 | walk->flags |= BLKCIPHER_WALK_PHYS; |
313 | walk->walk_blocksize = crypto_blkcipher_blocksize(desc->tfm); |
314 | walk->cipher_blocksize = walk->walk_blocksize; |
315 | walk->ivsize = crypto_blkcipher_ivsize(desc->tfm); |
316 | walk->alignmask = crypto_blkcipher_alignmask(desc->tfm); |
317 | return blkcipher_walk_first(desc, walk); |
318 | } |
319 | EXPORT_SYMBOL_GPL(blkcipher_walk_phys); |
320 | |
321 | static int blkcipher_walk_first(struct blkcipher_desc *desc, |
322 | struct blkcipher_walk *walk) |
323 | { |
324 | if (WARN_ON_ONCE(in_irq())) |
325 | return -EDEADLK; |
326 | |
327 | walk->iv = desc->info; |
328 | walk->nbytes = walk->total; |
329 | if (unlikely(!walk->total)) |
330 | return 0; |
331 | |
332 | walk->buffer = NULL; |
333 | if (unlikely(((unsigned long)walk->iv & walk->alignmask))) { |
334 | int err = blkcipher_copy_iv(walk); |
335 | if (err) |
336 | return err; |
337 | } |
338 | |
339 | scatterwalk_start(&walk->in, walk->in.sg); |
340 | scatterwalk_start(&walk->out, walk->out.sg); |
341 | walk->page = NULL; |
342 | |
343 | return blkcipher_walk_next(desc, walk); |
344 | } |
345 | |
346 | int blkcipher_walk_virt_block(struct blkcipher_desc *desc, |
347 | struct blkcipher_walk *walk, |
348 | unsigned int blocksize) |
349 | { |
350 | walk->flags &= ~BLKCIPHER_WALK_PHYS; |
351 | walk->walk_blocksize = blocksize; |
352 | walk->cipher_blocksize = crypto_blkcipher_blocksize(desc->tfm); |
353 | walk->ivsize = crypto_blkcipher_ivsize(desc->tfm); |
354 | walk->alignmask = crypto_blkcipher_alignmask(desc->tfm); |
355 | return blkcipher_walk_first(desc, walk); |
356 | } |
357 | EXPORT_SYMBOL_GPL(blkcipher_walk_virt_block); |
358 | |
359 | int blkcipher_aead_walk_virt_block(struct blkcipher_desc *desc, |
360 | struct blkcipher_walk *walk, |
361 | struct crypto_aead *tfm, |
362 | unsigned int blocksize) |
363 | { |
364 | walk->flags &= ~BLKCIPHER_WALK_PHYS; |
365 | walk->walk_blocksize = blocksize; |
366 | walk->cipher_blocksize = crypto_aead_blocksize(tfm); |
367 | walk->ivsize = crypto_aead_ivsize(tfm); |
368 | walk->alignmask = crypto_aead_alignmask(tfm); |
369 | return blkcipher_walk_first(desc, walk); |
370 | } |
371 | EXPORT_SYMBOL_GPL(blkcipher_aead_walk_virt_block); |
372 | |
373 | static int setkey_unaligned(struct crypto_tfm *tfm, const u8 *key, |
374 | unsigned int keylen) |
375 | { |
376 | struct blkcipher_alg *cipher = &tfm->__crt_alg->cra_blkcipher; |
377 | unsigned long alignmask = crypto_tfm_alg_alignmask(tfm); |
378 | int ret; |
379 | u8 *buffer, *alignbuffer; |
380 | unsigned long absize; |
381 | |
382 | absize = keylen + alignmask; |
383 | buffer = kmalloc(absize, GFP_ATOMIC); |
384 | if (!buffer) |
385 | return -ENOMEM; |
386 | |
387 | alignbuffer = (u8 *)ALIGN((unsigned long)buffer, alignmask + 1); |
388 | memcpy(alignbuffer, key, keylen); |
389 | ret = cipher->setkey(tfm, alignbuffer, keylen); |
390 | memset(alignbuffer, 0, keylen); |
391 | kfree(buffer); |
392 | return ret; |
393 | } |
394 | |
395 | static int setkey(struct crypto_tfm *tfm, const u8 *key, unsigned int keylen) |
396 | { |
397 | struct blkcipher_alg *cipher = &tfm->__crt_alg->cra_blkcipher; |
398 | unsigned long alignmask = crypto_tfm_alg_alignmask(tfm); |
399 | |
400 | if (keylen < cipher->min_keysize || keylen > cipher->max_keysize) { |
401 | tfm->crt_flags |= CRYPTO_TFM_RES_BAD_KEY_LEN; |
402 | return -EINVAL; |
403 | } |
404 | |
405 | if ((unsigned long)key & alignmask) |
406 | return setkey_unaligned(tfm, key, keylen); |
407 | |
408 | return cipher->setkey(tfm, key, keylen); |
409 | } |
410 | |
411 | static int async_setkey(struct crypto_ablkcipher *tfm, const u8 *key, |
412 | unsigned int keylen) |
413 | { |
414 | return setkey(crypto_ablkcipher_tfm(tfm), key, keylen); |
415 | } |
416 | |
417 | static int async_encrypt(struct ablkcipher_request *req) |
418 | { |
419 | struct crypto_tfm *tfm = req->base.tfm; |
420 | struct blkcipher_alg *alg = &tfm->__crt_alg->cra_blkcipher; |
421 | struct blkcipher_desc desc = { |
422 | .tfm = __crypto_blkcipher_cast(tfm), |
423 | .info = req->info, |
424 | .flags = req->base.flags, |
425 | }; |
426 | |
427 | |
428 | return alg->encrypt(&desc, req->dst, req->src, req->nbytes); |
429 | } |
430 | |
431 | static int async_decrypt(struct ablkcipher_request *req) |
432 | { |
433 | struct crypto_tfm *tfm = req->base.tfm; |
434 | struct blkcipher_alg *alg = &tfm->__crt_alg->cra_blkcipher; |
435 | struct blkcipher_desc desc = { |
436 | .tfm = __crypto_blkcipher_cast(tfm), |
437 | .info = req->info, |
438 | .flags = req->base.flags, |
439 | }; |
440 | |
441 | return alg->decrypt(&desc, req->dst, req->src, req->nbytes); |
442 | } |
443 | |
444 | static unsigned int crypto_blkcipher_ctxsize(struct crypto_alg *alg, u32 type, |
445 | u32 mask) |
446 | { |
447 | struct blkcipher_alg *cipher = &alg->cra_blkcipher; |
448 | unsigned int len = alg->cra_ctxsize; |
449 | |
450 | if ((mask & CRYPTO_ALG_TYPE_MASK) == CRYPTO_ALG_TYPE_MASK && |
451 | cipher->ivsize) { |
452 | len = ALIGN(len, (unsigned long)alg->cra_alignmask + 1); |
453 | len += cipher->ivsize; |
454 | } |
455 | |
456 | return len; |
457 | } |
458 | |
459 | static int crypto_init_blkcipher_ops_async(struct crypto_tfm *tfm) |
460 | { |
461 | struct ablkcipher_tfm *crt = &tfm->crt_ablkcipher; |
462 | struct blkcipher_alg *alg = &tfm->__crt_alg->cra_blkcipher; |
463 | |
464 | crt->setkey = async_setkey; |
465 | crt->encrypt = async_encrypt; |
466 | crt->decrypt = async_decrypt; |
467 | crt->base = __crypto_ablkcipher_cast(tfm); |
468 | crt->ivsize = alg->ivsize; |
469 | |
470 | return 0; |
471 | } |
472 | |
473 | static int crypto_init_blkcipher_ops_sync(struct crypto_tfm *tfm) |
474 | { |
475 | struct blkcipher_tfm *crt = &tfm->crt_blkcipher; |
476 | struct blkcipher_alg *alg = &tfm->__crt_alg->cra_blkcipher; |
477 | unsigned long align = crypto_tfm_alg_alignmask(tfm) + 1; |
478 | unsigned long addr; |
479 | |
480 | crt->setkey = setkey; |
481 | crt->encrypt = alg->encrypt; |
482 | crt->decrypt = alg->decrypt; |
483 | |
484 | addr = (unsigned long)crypto_tfm_ctx(tfm); |
485 | addr = ALIGN(addr, align); |
486 | addr += ALIGN(tfm->__crt_alg->cra_ctxsize, align); |
487 | crt->iv = (void *)addr; |
488 | |
489 | return 0; |
490 | } |
491 | |
492 | static int crypto_init_blkcipher_ops(struct crypto_tfm *tfm, u32 type, u32 mask) |
493 | { |
494 | struct blkcipher_alg *alg = &tfm->__crt_alg->cra_blkcipher; |
495 | |
496 | if (alg->ivsize > PAGE_SIZE / 8) |
497 | return -EINVAL; |
498 | |
499 | if ((mask & CRYPTO_ALG_TYPE_MASK) == CRYPTO_ALG_TYPE_MASK) |
500 | return crypto_init_blkcipher_ops_sync(tfm); |
501 | else |
502 | return crypto_init_blkcipher_ops_async(tfm); |
503 | } |
504 | |
505 | #ifdef CONFIG_NET |
506 | static int crypto_blkcipher_report(struct sk_buff *skb, struct crypto_alg *alg) |
507 | { |
508 | struct crypto_report_blkcipher rblkcipher; |
509 | |
510 | strncpy(rblkcipher.type, "blkcipher", sizeof(rblkcipher.type)); |
511 | strncpy(rblkcipher.geniv, alg->cra_blkcipher.geniv ?: "<default>", |
512 | sizeof(rblkcipher.geniv)); |
513 | rblkcipher.geniv[sizeof(rblkcipher.geniv) - 1] = '\0'; |
514 | |
515 | rblkcipher.blocksize = alg->cra_blocksize; |
516 | rblkcipher.min_keysize = alg->cra_blkcipher.min_keysize; |
517 | rblkcipher.max_keysize = alg->cra_blkcipher.max_keysize; |
518 | rblkcipher.ivsize = alg->cra_blkcipher.ivsize; |
519 | |
520 | if (nla_put(skb, CRYPTOCFGA_REPORT_BLKCIPHER, |
521 | sizeof(struct crypto_report_blkcipher), &rblkcipher)) |
522 | goto nla_put_failure; |
523 | return 0; |
524 | |
525 | nla_put_failure: |
526 | return -EMSGSIZE; |
527 | } |
528 | #else |
529 | static int crypto_blkcipher_report(struct sk_buff *skb, struct crypto_alg *alg) |
530 | { |
531 | return -ENOSYS; |
532 | } |
533 | #endif |
534 | |
535 | static void crypto_blkcipher_show(struct seq_file *m, struct crypto_alg *alg) |
536 | __attribute__ ((unused)); |
537 | static void crypto_blkcipher_show(struct seq_file *m, struct crypto_alg *alg) |
538 | { |
539 | seq_printf(m, "type : blkcipher\n"); |
540 | seq_printf(m, "blocksize : %u\n", alg->cra_blocksize); |
541 | seq_printf(m, "min keysize : %u\n", alg->cra_blkcipher.min_keysize); |
542 | seq_printf(m, "max keysize : %u\n", alg->cra_blkcipher.max_keysize); |
543 | seq_printf(m, "ivsize : %u\n", alg->cra_blkcipher.ivsize); |
544 | seq_printf(m, "geniv : %s\n", alg->cra_blkcipher.geniv ?: |
545 | "<default>"); |
546 | } |
547 | |
548 | const struct crypto_type crypto_blkcipher_type = { |
549 | .ctxsize = crypto_blkcipher_ctxsize, |
550 | .init = crypto_init_blkcipher_ops, |
551 | #ifdef CONFIG_PROC_FS |
552 | .show = crypto_blkcipher_show, |
553 | #endif |
554 | .report = crypto_blkcipher_report, |
555 | }; |
556 | EXPORT_SYMBOL_GPL(crypto_blkcipher_type); |
557 | |
558 | MODULE_LICENSE("GPL"); |
559 | MODULE_DESCRIPTION("Generic block chaining cipher type"); |
560 |