1 // SPDX-License-Identifier: GPL-2.0-or-later <<
2 /* 1 /*
3 * Symmetric key cipher operations. 2 * Symmetric key cipher operations.
4 * 3 *
5 * Generic encrypt/decrypt wrapper for ciphers 4 * Generic encrypt/decrypt wrapper for ciphers, handles operations across
6 * multiple page boundaries by using temporary 5 * multiple page boundaries by using temporary blocks. In user context,
7 * the kernel is given a chance to schedule us 6 * the kernel is given a chance to schedule us once per page.
8 * 7 *
9 * Copyright (c) 2015 Herbert Xu <herbert@gond 8 * Copyright (c) 2015 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 *
10 */ 15 */
11 16
12 #include <crypto/internal/aead.h> <<
13 #include <crypto/internal/cipher.h> <<
14 #include <crypto/internal/skcipher.h> 17 #include <crypto/internal/skcipher.h>
15 #include <crypto/scatterwalk.h> <<
16 #include <linux/bug.h> 18 #include <linux/bug.h>
17 #include <linux/cryptouser.h> <<
18 #include <linux/err.h> <<
19 #include <linux/kernel.h> <<
20 #include <linux/list.h> <<
21 #include <linux/mm.h> <<
22 #include <linux/module.h> 19 #include <linux/module.h>
23 #include <linux/seq_file.h> <<
24 #include <linux/slab.h> <<
25 #include <linux/string.h> <<
26 #include <net/netlink.h> <<
27 #include "skcipher.h" <<
28 <<
29 #define CRYPTO_ALG_TYPE_SKCIPHER_MASK 0x0000 <<
30 <<
31 enum { <<
32 SKCIPHER_WALK_PHYS = 1 << 0, <<
33 SKCIPHER_WALK_SLOW = 1 << 1, <<
34 SKCIPHER_WALK_COPY = 1 << 2, <<
35 SKCIPHER_WALK_DIFF = 1 << 3, <<
36 SKCIPHER_WALK_SLEEP = 1 << 4, <<
37 }; <<
38 <<
39 struct skcipher_walk_buffer { <<
40 struct list_head entry; <<
41 struct scatter_walk dst; <<
42 unsigned int len; <<
43 u8 *data; <<
44 u8 buffer[]; <<
45 }; <<
46 20
47 static const struct crypto_type crypto_skciphe !! 21 #include "internal.h"
48 22
49 static int skcipher_walk_next(struct skcipher_ !! 23 static unsigned int crypto_skcipher_extsize(struct crypto_alg *alg)
50 <<
51 static inline void skcipher_map_src(struct skc <<
52 { <<
53 walk->src.virt.addr = scatterwalk_map( <<
54 } <<
55 <<
56 static inline void skcipher_map_dst(struct skc <<
57 { <<
58 walk->dst.virt.addr = scatterwalk_map( <<
59 } <<
60 <<
61 static inline void skcipher_unmap_src(struct s <<
62 { <<
63 scatterwalk_unmap(walk->src.virt.addr) <<
64 } <<
65 <<
66 static inline void skcipher_unmap_dst(struct s <<
67 { <<
68 scatterwalk_unmap(walk->dst.virt.addr) <<
69 } <<
70 <<
71 static inline gfp_t skcipher_walk_gfp(struct s <<
72 { <<
73 return walk->flags & SKCIPHER_WALK_SLE <<
74 } <<
75 <<
76 /* Get a spot of the specified length that doe <<
77 * The caller needs to ensure that there is en <<
78 */ <<
79 static inline u8 *skcipher_get_spot(u8 *start, <<
80 { <<
81 u8 *end_page = (u8 *)(((unsigned long) <<
82 <<
83 return max(start, end_page); <<
84 } <<
85 <<
86 static inline struct skcipher_alg *__crypto_sk <<
87 struct crypto_alg *alg) <<
88 { 24 {
89 return container_of(alg, struct skciph !! 25 if (alg->cra_type == &crypto_blkcipher_type)
90 } !! 26 return sizeof(struct crypto_blkcipher *);
91 27
92 static int skcipher_done_slow(struct skcipher_ !! 28 BUG_ON(alg->cra_type != &crypto_ablkcipher_type &&
93 { !! 29 alg->cra_type != &crypto_givcipher_type);
94 u8 *addr; <<
95 30
96 addr = (u8 *)ALIGN((unsigned long)walk !! 31 return sizeof(struct crypto_ablkcipher *);
97 addr = skcipher_get_spot(addr, bsize); <<
98 scatterwalk_copychunks(addr, &walk->ou <<
99 (walk->flags & <<
100 return 0; <<
101 } 32 }
102 33
103 int skcipher_walk_done(struct skcipher_walk *w !! 34 static int skcipher_setkey_blkcipher(struct crypto_skcipher *tfm,
>> 35 const u8 *key, unsigned int keylen)
104 { 36 {
105 unsigned int n = walk->nbytes; !! 37 struct crypto_blkcipher **ctx = crypto_skcipher_ctx(tfm);
106 unsigned int nbytes = 0; !! 38 struct crypto_blkcipher *blkcipher = *ctx;
107 !! 39 int err;
108 if (!n) <<
109 goto finish; <<
110 <<
111 if (likely(err >= 0)) { <<
112 n -= err; <<
113 nbytes = walk->total - n; <<
114 } <<
115 <<
116 if (likely(!(walk->flags & (SKCIPHER_W <<
117 SKCIPHER_W <<
118 SKCIPHER_W <<
119 SKCIPHER_W <<
120 unmap_src: <<
121 skcipher_unmap_src(walk); <<
122 } else if (walk->flags & SKCIPHER_WALK <<
123 skcipher_unmap_dst(walk); <<
124 goto unmap_src; <<
125 } else if (walk->flags & SKCIPHER_WALK <<
126 skcipher_map_dst(walk); <<
127 memcpy(walk->dst.virt.addr, wa <<
128 skcipher_unmap_dst(walk); <<
129 } else if (unlikely(walk->flags & SKCI <<
130 if (err > 0) { <<
131 /* <<
132 * Didn't process all <<
133 * broken, or this was <<
134 * the message wasn't <<
135 * the algorithm requi <<
136 */ <<
137 err = -EINVAL; <<
138 nbytes = 0; <<
139 } else <<
140 n = skcipher_done_slow <<
141 } <<
142 <<
143 if (err > 0) <<
144 err = 0; <<
145 <<
146 walk->total = nbytes; <<
147 walk->nbytes = 0; <<
148 <<
149 scatterwalk_advance(&walk->in, n); <<
150 scatterwalk_advance(&walk->out, n); <<
151 scatterwalk_done(&walk->in, 0, nbytes) <<
152 scatterwalk_done(&walk->out, 1, nbytes <<
153 <<
154 if (nbytes) { <<
155 crypto_yield(walk->flags & SKC <<
156 CRYPTO_TFM_REQ_MA <<
157 return skcipher_walk_next(walk <<
158 } <<
159 40
160 finish: !! 41 crypto_blkcipher_clear_flags(blkcipher, ~0);
161 /* Short-circuit for the common/fast p !! 42 crypto_blkcipher_set_flags(blkcipher, crypto_skcipher_get_flags(tfm) &
162 if (!((unsigned long)walk->buffer | (u !! 43 CRYPTO_TFM_REQ_MASK);
163 goto out; !! 44 err = crypto_blkcipher_setkey(blkcipher, key, keylen);
164 !! 45 crypto_skcipher_set_flags(tfm, crypto_blkcipher_get_flags(blkcipher) &
165 if (walk->flags & SKCIPHER_WALK_PHYS) !! 46 CRYPTO_TFM_RES_MASK);
166 goto out; <<
167 <<
168 if (walk->iv != walk->oiv) <<
169 memcpy(walk->oiv, walk->iv, wa <<
170 if (walk->buffer != walk->page) <<
171 kfree(walk->buffer); <<
172 if (walk->page) <<
173 free_page((unsigned long)walk- <<
174 47
175 out: <<
176 return err; 48 return err;
177 } 49 }
178 EXPORT_SYMBOL_GPL(skcipher_walk_done); <<
179 50
180 void skcipher_walk_complete(struct skcipher_wa !! 51 static int skcipher_crypt_blkcipher(struct skcipher_request *req,
>> 52 int (*crypt)(struct blkcipher_desc *,
>> 53 struct scatterlist *,
>> 54 struct scatterlist *,
>> 55 unsigned int))
181 { 56 {
182 struct skcipher_walk_buffer *p, *tmp; !! 57 struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
183 !! 58 struct crypto_blkcipher **ctx = crypto_skcipher_ctx(tfm);
184 list_for_each_entry_safe(p, tmp, &walk !! 59 struct blkcipher_desc desc = {
185 u8 *data; !! 60 .tfm = *ctx,
186 !! 61 .info = req->iv,
187 if (err) !! 62 .flags = req->base.flags,
188 goto done; !! 63 };
189 <<
190 data = p->data; <<
191 if (!data) { <<
192 data = PTR_ALIGN(&p->b <<
193 data = skcipher_get_sp <<
194 } <<
195 <<
196 scatterwalk_copychunks(data, & <<
197 <<
198 if (offset_in_page(p->data) + <<
199 PAGE_SIZE) <<
200 free_page((unsigned lo <<
201 <<
202 done: <<
203 list_del(&p->entry); <<
204 kfree(p); <<
205 } <<
206 64
207 if (!err && walk->iv != walk->oiv) <<
208 memcpy(walk->oiv, walk->iv, wa <<
209 if (walk->buffer != walk->page) <<
210 kfree(walk->buffer); <<
211 if (walk->page) <<
212 free_page((unsigned long)walk- <<
213 } <<
214 EXPORT_SYMBOL_GPL(skcipher_walk_complete); <<
215 65
216 static void skcipher_queue_write(struct skciph !! 66 return crypt(&desc, req->dst, req->src, req->cryptlen);
217 struct skciph <<
218 { <<
219 p->dst = walk->out; <<
220 list_add_tail(&p->entry, &walk->buffer <<
221 } 67 }
222 68
223 static int skcipher_next_slow(struct skcipher_ !! 69 static int skcipher_encrypt_blkcipher(struct skcipher_request *req)
224 { 70 {
225 bool phys = walk->flags & SKCIPHER_WAL !! 71 struct crypto_skcipher *skcipher = crypto_skcipher_reqtfm(req);
226 unsigned alignmask = walk->alignmask; !! 72 struct crypto_tfm *tfm = crypto_skcipher_tfm(skcipher);
227 struct skcipher_walk_buffer *p; !! 73 struct blkcipher_alg *alg = &tfm->__crt_alg->cra_blkcipher;
228 unsigned a; <<
229 unsigned n; <<
230 u8 *buffer; <<
231 void *v; <<
232 <<
233 if (!phys) { <<
234 if (!walk->buffer) <<
235 walk->buffer = walk->p <<
236 buffer = walk->buffer; <<
237 if (buffer) <<
238 goto ok; <<
239 } <<
240 <<
241 /* Start with the minimum alignment of <<
242 a = crypto_tfm_ctx_alignment() - 1; <<
243 n = bsize; <<
244 <<
245 if (phys) { <<
246 /* Calculate the minimum align <<
247 a &= (sizeof(*p) ^ (sizeof(*p) <<
248 n += sizeof(*p); <<
249 } <<
250 <<
251 /* Minimum size to align p->buffer by <<
252 n += alignmask & ~a; <<
253 <<
254 /* Minimum size to ensure p->buffer do <<
255 n += (bsize - 1) & ~(alignmask | a); <<
256 74
257 v = kzalloc(n, skcipher_walk_gfp(walk) !! 75 return skcipher_crypt_blkcipher(req, alg->encrypt);
258 if (!v) <<
259 return skcipher_walk_done(walk <<
260 <<
261 if (phys) { <<
262 p = v; <<
263 p->len = bsize; <<
264 skcipher_queue_write(walk, p); <<
265 buffer = p->buffer; <<
266 } else { <<
267 walk->buffer = v; <<
268 buffer = v; <<
269 } <<
270 <<
271 ok: <<
272 walk->dst.virt.addr = PTR_ALIGN(buffer <<
273 walk->dst.virt.addr = skcipher_get_spo <<
274 walk->src.virt.addr = walk->dst.virt.a <<
275 <<
276 scatterwalk_copychunks(walk->src.virt. <<
277 <<
278 walk->nbytes = bsize; <<
279 walk->flags |= SKCIPHER_WALK_SLOW; <<
280 <<
281 return 0; <<
282 } 76 }
283 77
284 static int skcipher_next_copy(struct skcipher_ !! 78 static int skcipher_decrypt_blkcipher(struct skcipher_request *req)
285 { 79 {
286 struct skcipher_walk_buffer *p; !! 80 struct crypto_skcipher *skcipher = crypto_skcipher_reqtfm(req);
287 u8 *tmp = walk->page; !! 81 struct crypto_tfm *tfm = crypto_skcipher_tfm(skcipher);
288 !! 82 struct blkcipher_alg *alg = &tfm->__crt_alg->cra_blkcipher;
289 skcipher_map_src(walk); <<
290 memcpy(tmp, walk->src.virt.addr, walk- <<
291 skcipher_unmap_src(walk); <<
292 <<
293 walk->src.virt.addr = tmp; <<
294 walk->dst.virt.addr = tmp; <<
295 <<
296 if (!(walk->flags & SKCIPHER_WALK_PHYS <<
297 return 0; <<
298 <<
299 p = kmalloc(sizeof(*p), skcipher_walk_ <<
300 if (!p) <<
301 return -ENOMEM; <<
302 <<
303 p->data = walk->page; <<
304 p->len = walk->nbytes; <<
305 skcipher_queue_write(walk, p); <<
306 <<
307 if (offset_in_page(walk->page) + walk- <<
308 PAGE_SIZE) <<
309 walk->page = NULL; <<
310 else <<
311 walk->page += walk->nbytes; <<
312 83
313 return 0; !! 84 return skcipher_crypt_blkcipher(req, alg->decrypt);
314 } 85 }
315 86
316 static int skcipher_next_fast(struct skcipher_ !! 87 static void crypto_exit_skcipher_ops_blkcipher(struct crypto_tfm *tfm)
317 { 88 {
318 unsigned long diff; !! 89 struct crypto_blkcipher **ctx = crypto_tfm_ctx(tfm);
319 <<
320 walk->src.phys.page = scatterwalk_page <<
321 walk->src.phys.offset = offset_in_page <<
322 walk->dst.phys.page = scatterwalk_page <<
323 walk->dst.phys.offset = offset_in_page <<
324 90
325 if (walk->flags & SKCIPHER_WALK_PHYS) !! 91 crypto_free_blkcipher(*ctx);
326 return 0; <<
327 <<
328 diff = walk->src.phys.offset - walk->d <<
329 diff |= walk->src.virt.page - walk->ds <<
330 <<
331 skcipher_map_src(walk); <<
332 walk->dst.virt.addr = walk->src.virt.a <<
333 <<
334 if (diff) { <<
335 walk->flags |= SKCIPHER_WALK_D <<
336 skcipher_map_dst(walk); <<
337 } <<
338 <<
339 return 0; <<
340 } 92 }
341 93
342 static int skcipher_walk_next(struct skcipher_ !! 94 static int crypto_init_skcipher_ops_blkcipher(struct crypto_tfm *tfm)
343 { 95 {
344 unsigned int bsize; !! 96 struct crypto_alg *calg = tfm->__crt_alg;
345 unsigned int n; !! 97 struct crypto_skcipher *skcipher = __crypto_skcipher_cast(tfm);
346 int err; !! 98 struct crypto_blkcipher **ctx = crypto_tfm_ctx(tfm);
347 !! 99 struct crypto_blkcipher *blkcipher;
348 walk->flags &= ~(SKCIPHER_WALK_SLOW | !! 100 struct crypto_tfm *btfm;
349 SKCIPHER_WALK_DIFF); <<
350 <<
351 n = walk->total; <<
352 bsize = min(walk->stride, max(n, walk- <<
353 n = scatterwalk_clamp(&walk->in, n); <<
354 n = scatterwalk_clamp(&walk->out, n); <<
355 <<
356 if (unlikely(n < bsize)) { <<
357 if (unlikely(walk->total < wal <<
358 return skcipher_walk_d <<
359 <<
360 slow_path: <<
361 err = skcipher_next_slow(walk, <<
362 goto set_phys_lowmem; <<
363 } <<
364 <<
365 if (unlikely((walk->in.offset | walk-> <<
366 if (!walk->page) { <<
367 gfp_t gfp = skcipher_w <<
368 <<
369 walk->page = (void *)_ <<
370 if (!walk->page) <<
371 goto slow_path <<
372 } <<
373 <<
374 walk->nbytes = min_t(unsigned, <<
375 PAGE_SIZE <<
376 walk->flags |= SKCIPHER_WALK_C <<
377 err = skcipher_next_copy(walk) <<
378 goto set_phys_lowmem; <<
379 } <<
380 <<
381 walk->nbytes = n; <<
382 101
383 return skcipher_next_fast(walk); !! 102 if (!crypto_mod_get(calg))
>> 103 return -EAGAIN;
384 104
385 set_phys_lowmem: !! 105 btfm = __crypto_alloc_tfm(calg, CRYPTO_ALG_TYPE_BLKCIPHER,
386 if (!err && (walk->flags & SKCIPHER_WA !! 106 CRYPTO_ALG_TYPE_MASK);
387 walk->src.phys.page = virt_to_ !! 107 if (IS_ERR(btfm)) {
388 walk->dst.phys.page = virt_to_ !! 108 crypto_mod_put(calg);
389 walk->src.phys.offset &= PAGE_ !! 109 return PTR_ERR(btfm);
390 walk->dst.phys.offset &= PAGE_ <<
391 } 110 }
392 return err; <<
393 } <<
394 111
395 static int skcipher_copy_iv(struct skcipher_wa !! 112 blkcipher = __crypto_blkcipher_cast(btfm);
396 { !! 113 *ctx = blkcipher;
397 unsigned a = crypto_tfm_ctx_alignment( !! 114 tfm->exit = crypto_exit_skcipher_ops_blkcipher;
398 unsigned alignmask = walk->alignmask; <<
399 unsigned ivsize = walk->ivsize; <<
400 unsigned bs = walk->stride; <<
401 unsigned aligned_bs; <<
402 unsigned size; <<
403 u8 *iv; <<
404 <<
405 aligned_bs = ALIGN(bs, alignmask + 1); <<
406 <<
407 /* Minimum size to align buffer by ali <<
408 size = alignmask & ~a; <<
409 <<
410 if (walk->flags & SKCIPHER_WALK_PHYS) <<
411 size += ivsize; <<
412 else { <<
413 size += aligned_bs + ivsize; <<
414 <<
415 /* Minimum size to ensure buff <<
416 size += (bs - 1) & ~(alignmask <<
417 } <<
418 115
419 walk->buffer = kmalloc(size, skcipher_ !! 116 skcipher->setkey = skcipher_setkey_blkcipher;
420 if (!walk->buffer) !! 117 skcipher->encrypt = skcipher_encrypt_blkcipher;
421 return -ENOMEM; !! 118 skcipher->decrypt = skcipher_decrypt_blkcipher;
422 119
423 iv = PTR_ALIGN(walk->buffer, alignmask !! 120 skcipher->ivsize = crypto_blkcipher_ivsize(blkcipher);
424 iv = skcipher_get_spot(iv, bs) + align !! 121 skcipher->has_setkey = calg->cra_blkcipher.max_keysize;
425 122
426 walk->iv = memcpy(iv, walk->iv, walk-> <<
427 return 0; 123 return 0;
428 } 124 }
429 125
430 static int skcipher_walk_first(struct skcipher !! 126 static int skcipher_setkey_ablkcipher(struct crypto_skcipher *tfm,
431 { !! 127 const u8 *key, unsigned int keylen)
432 if (WARN_ON_ONCE(in_hardirq())) <<
433 return -EDEADLK; <<
434 <<
435 walk->buffer = NULL; <<
436 if (unlikely(((unsigned long)walk->iv <<
437 int err = skcipher_copy_iv(wal <<
438 if (err) <<
439 return err; <<
440 } <<
441 <<
442 walk->page = NULL; <<
443 <<
444 return skcipher_walk_next(walk); <<
445 } <<
446 <<
447 static int skcipher_walk_skcipher(struct skcip <<
448 struct skcip <<
449 { <<
450 struct crypto_skcipher *tfm = crypto_s <<
451 struct skcipher_alg *alg = crypto_skci <<
452 <<
453 walk->total = req->cryptlen; <<
454 walk->nbytes = 0; <<
455 walk->iv = req->iv; <<
456 walk->oiv = req->iv; <<
457 <<
458 if (unlikely(!walk->total)) <<
459 return 0; <<
460 <<
461 scatterwalk_start(&walk->in, req->src) <<
462 scatterwalk_start(&walk->out, req->dst <<
463 <<
464 walk->flags &= ~SKCIPHER_WALK_SLEEP; <<
465 walk->flags |= req->base.flags & CRYPT <<
466 SKCIPHER_WALK_SLEEP : 0 <<
467 <<
468 walk->blocksize = crypto_skcipher_bloc <<
469 walk->ivsize = crypto_skcipher_ivsize( <<
470 walk->alignmask = crypto_skcipher_alig <<
471 <<
472 if (alg->co.base.cra_type != &crypto_s <<
473 walk->stride = alg->co.chunksi <<
474 else <<
475 walk->stride = alg->walksize; <<
476 <<
477 return skcipher_walk_first(walk); <<
478 } <<
479 <<
480 int skcipher_walk_virt(struct skcipher_walk *w <<
481 struct skcipher_request <<
482 { 128 {
>> 129 struct crypto_ablkcipher **ctx = crypto_skcipher_ctx(tfm);
>> 130 struct crypto_ablkcipher *ablkcipher = *ctx;
483 int err; 131 int err;
484 132
485 might_sleep_if(req->base.flags & CRYPT !! 133 crypto_ablkcipher_clear_flags(ablkcipher, ~0);
486 !! 134 crypto_ablkcipher_set_flags(ablkcipher,
487 walk->flags &= ~SKCIPHER_WALK_PHYS; !! 135 crypto_skcipher_get_flags(tfm) &
488 !! 136 CRYPTO_TFM_REQ_MASK);
489 err = skcipher_walk_skcipher(walk, req !! 137 err = crypto_ablkcipher_setkey(ablkcipher, key, keylen);
490 !! 138 crypto_skcipher_set_flags(tfm,
491 walk->flags &= atomic ? ~SKCIPHER_WALK !! 139 crypto_ablkcipher_get_flags(ablkcipher) &
>> 140 CRYPTO_TFM_RES_MASK);
492 141
493 return err; 142 return err;
494 } 143 }
495 EXPORT_SYMBOL_GPL(skcipher_walk_virt); <<
496 144
497 int skcipher_walk_async(struct skcipher_walk * !! 145 static int skcipher_crypt_ablkcipher(struct skcipher_request *req,
498 struct skcipher_reques !! 146 int (*crypt)(struct ablkcipher_request *))
499 { <<
500 walk->flags |= SKCIPHER_WALK_PHYS; <<
501 <<
502 INIT_LIST_HEAD(&walk->buffers); <<
503 <<
504 return skcipher_walk_skcipher(walk, re <<
505 } <<
506 EXPORT_SYMBOL_GPL(skcipher_walk_async); <<
507 <<
508 static int skcipher_walk_aead_common(struct sk <<
509 struct ae <<
510 { <<
511 struct crypto_aead *tfm = crypto_aead_ <<
512 int err; <<
513 <<
514 walk->nbytes = 0; <<
515 walk->iv = req->iv; <<
516 walk->oiv = req->iv; <<
517 <<
518 if (unlikely(!walk->total)) <<
519 return 0; <<
520 <<
521 walk->flags &= ~SKCIPHER_WALK_PHYS; <<
522 <<
523 scatterwalk_start(&walk->in, req->src) <<
524 scatterwalk_start(&walk->out, req->dst <<
525 <<
526 scatterwalk_copychunks(NULL, &walk->in <<
527 scatterwalk_copychunks(NULL, &walk->ou <<
528 <<
529 scatterwalk_done(&walk->in, 0, walk->t <<
530 scatterwalk_done(&walk->out, 0, walk-> <<
531 <<
532 if (req->base.flags & CRYPTO_TFM_REQ_M <<
533 walk->flags |= SKCIPHER_WALK_S <<
534 else <<
535 walk->flags &= ~SKCIPHER_WALK_ <<
536 <<
537 walk->blocksize = crypto_aead_blocksiz <<
538 walk->stride = crypto_aead_chunksize(t <<
539 walk->ivsize = crypto_aead_ivsize(tfm) <<
540 walk->alignmask = crypto_aead_alignmas <<
541 <<
542 err = skcipher_walk_first(walk); <<
543 <<
544 if (atomic) <<
545 walk->flags &= ~SKCIPHER_WALK_ <<
546 <<
547 return err; <<
548 } <<
549 <<
550 int skcipher_walk_aead_encrypt(struct skcipher <<
551 struct aead_req <<
552 { <<
553 walk->total = req->cryptlen; <<
554 <<
555 return skcipher_walk_aead_common(walk, <<
556 } <<
557 EXPORT_SYMBOL_GPL(skcipher_walk_aead_encrypt); <<
558 <<
559 int skcipher_walk_aead_decrypt(struct skcipher <<
560 struct aead_req <<
561 { <<
562 struct crypto_aead *tfm = crypto_aead_ <<
563 <<
564 walk->total = req->cryptlen - crypto_a <<
565 <<
566 return skcipher_walk_aead_common(walk, <<
567 } <<
568 EXPORT_SYMBOL_GPL(skcipher_walk_aead_decrypt); <<
569 <<
570 static void skcipher_set_needkey(struct crypto <<
571 { <<
572 if (crypto_skcipher_max_keysize(tfm) ! <<
573 crypto_skcipher_set_flags(tfm, <<
574 } <<
575 <<
576 static int skcipher_setkey_unaligned(struct cr <<
577 const u8 <<
578 { <<
579 unsigned long alignmask = crypto_skcip <<
580 struct skcipher_alg *cipher = crypto_s <<
581 u8 *buffer, *alignbuffer; <<
582 unsigned long absize; <<
583 int ret; <<
584 <<
585 absize = keylen + alignmask; <<
586 buffer = kmalloc(absize, GFP_ATOMIC); <<
587 if (!buffer) <<
588 return -ENOMEM; <<
589 <<
590 alignbuffer = (u8 *)ALIGN((unsigned lo <<
591 memcpy(alignbuffer, key, keylen); <<
592 ret = cipher->setkey(tfm, alignbuffer, <<
593 kfree_sensitive(buffer); <<
594 return ret; <<
595 } <<
596 <<
597 int crypto_skcipher_setkey(struct crypto_skcip <<
598 unsigned int keylen <<
599 { <<
600 struct skcipher_alg *cipher = crypto_s <<
601 unsigned long alignmask = crypto_skcip <<
602 int err; <<
603 <<
604 if (cipher->co.base.cra_type != &crypt <<
605 struct crypto_lskcipher **ctx <<
606 <<
607 crypto_lskcipher_clear_flags(* <<
608 crypto_lskcipher_set_flags(*ct <<
609 cry <<
610 CRY <<
611 err = crypto_lskcipher_setkey( <<
612 goto out; <<
613 } <<
614 <<
615 if (keylen < cipher->min_keysize || ke <<
616 return -EINVAL; <<
617 <<
618 if ((unsigned long)key & alignmask) <<
619 err = skcipher_setkey_unaligne <<
620 else <<
621 err = cipher->setkey(tfm, key, <<
622 <<
623 out: <<
624 if (unlikely(err)) { <<
625 skcipher_set_needkey(tfm); <<
626 return err; <<
627 } <<
628 <<
629 crypto_skcipher_clear_flags(tfm, CRYPT <<
630 return 0; <<
631 } <<
632 EXPORT_SYMBOL_GPL(crypto_skcipher_setkey); <<
633 <<
634 int crypto_skcipher_encrypt(struct skcipher_re <<
635 { 147 {
636 struct crypto_skcipher *tfm = crypto_s 148 struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
637 struct skcipher_alg *alg = crypto_skci !! 149 struct crypto_ablkcipher **ctx = crypto_skcipher_ctx(tfm);
>> 150 struct ablkcipher_request *subreq = skcipher_request_ctx(req);
638 151
639 if (crypto_skcipher_get_flags(tfm) & C !! 152 ablkcipher_request_set_tfm(subreq, *ctx);
640 return -ENOKEY; !! 153 ablkcipher_request_set_callback(subreq, skcipher_request_flags(req),
641 if (alg->co.base.cra_type != &crypto_s !! 154 req->base.complete, req->base.data);
642 return crypto_lskcipher_encryp !! 155 ablkcipher_request_set_crypt(subreq, req->src, req->dst, req->cryptlen,
643 return alg->encrypt(req); !! 156 req->iv);
644 } <<
645 EXPORT_SYMBOL_GPL(crypto_skcipher_encrypt); <<
646 157
647 int crypto_skcipher_decrypt(struct skcipher_re !! 158 return crypt(subreq);
648 { <<
649 struct crypto_skcipher *tfm = crypto_s <<
650 struct skcipher_alg *alg = crypto_skci <<
651 <<
652 if (crypto_skcipher_get_flags(tfm) & C <<
653 return -ENOKEY; <<
654 if (alg->co.base.cra_type != &crypto_s <<
655 return crypto_lskcipher_decryp <<
656 return alg->decrypt(req); <<
657 } 159 }
658 EXPORT_SYMBOL_GPL(crypto_skcipher_decrypt); <<
659 160
660 static int crypto_lskcipher_export(struct skci !! 161 static int skcipher_encrypt_ablkcipher(struct skcipher_request *req)
661 { 162 {
662 struct crypto_skcipher *tfm = crypto_s !! 163 struct crypto_skcipher *skcipher = crypto_skcipher_reqtfm(req);
663 u8 *ivs = skcipher_request_ctx(req); !! 164 struct crypto_tfm *tfm = crypto_skcipher_tfm(skcipher);
664 !! 165 struct ablkcipher_alg *alg = &tfm->__crt_alg->cra_ablkcipher;
665 ivs = PTR_ALIGN(ivs, crypto_skcipher_a <<
666 166
667 memcpy(out, ivs + crypto_skcipher_ivsi !! 167 return skcipher_crypt_ablkcipher(req, alg->encrypt);
668 crypto_skcipher_statesize(tfm)) <<
669 <<
670 return 0; <<
671 } 168 }
672 169
673 static int crypto_lskcipher_import(struct skci !! 170 static int skcipher_decrypt_ablkcipher(struct skcipher_request *req)
674 { 171 {
675 struct crypto_skcipher *tfm = crypto_s !! 172 struct crypto_skcipher *skcipher = crypto_skcipher_reqtfm(req);
676 u8 *ivs = skcipher_request_ctx(req); !! 173 struct crypto_tfm *tfm = crypto_skcipher_tfm(skcipher);
677 !! 174 struct ablkcipher_alg *alg = &tfm->__crt_alg->cra_ablkcipher;
678 ivs = PTR_ALIGN(ivs, crypto_skcipher_a <<
679 175
680 memcpy(ivs + crypto_skcipher_ivsize(tf !! 176 return skcipher_crypt_ablkcipher(req, alg->decrypt);
681 crypto_skcipher_statesize(tfm)) <<
682 <<
683 return 0; <<
684 } 177 }
685 178
686 static int skcipher_noexport(struct skcipher_r !! 179 static void crypto_exit_skcipher_ops_ablkcipher(struct crypto_tfm *tfm)
687 { 180 {
688 return 0; !! 181 struct crypto_ablkcipher **ctx = crypto_tfm_ctx(tfm);
689 } <<
690 <<
691 static int skcipher_noimport(struct skcipher_r <<
692 { <<
693 return 0; <<
694 } <<
695 <<
696 int crypto_skcipher_export(struct skcipher_req <<
697 { <<
698 struct crypto_skcipher *tfm = crypto_s <<
699 struct skcipher_alg *alg = crypto_skci <<
700 182
701 if (alg->co.base.cra_type != &crypto_s !! 183 crypto_free_ablkcipher(*ctx);
702 return crypto_lskcipher_export <<
703 return alg->export(req, out); <<
704 } 184 }
705 EXPORT_SYMBOL_GPL(crypto_skcipher_export); <<
706 185
707 int crypto_skcipher_import(struct skcipher_req !! 186 static int crypto_init_skcipher_ops_ablkcipher(struct crypto_tfm *tfm)
708 { <<
709 struct crypto_skcipher *tfm = crypto_s <<
710 struct skcipher_alg *alg = crypto_skci <<
711 <<
712 if (alg->co.base.cra_type != &crypto_s <<
713 return crypto_lskcipher_import <<
714 return alg->import(req, in); <<
715 } <<
716 EXPORT_SYMBOL_GPL(crypto_skcipher_import); <<
717 <<
718 static void crypto_skcipher_exit_tfm(struct cr <<
719 { 187 {
>> 188 struct crypto_alg *calg = tfm->__crt_alg;
720 struct crypto_skcipher *skcipher = __c 189 struct crypto_skcipher *skcipher = __crypto_skcipher_cast(tfm);
721 struct skcipher_alg *alg = crypto_skci !! 190 struct crypto_ablkcipher **ctx = crypto_tfm_ctx(tfm);
722 !! 191 struct crypto_ablkcipher *ablkcipher;
723 alg->exit(skcipher); !! 192 struct crypto_tfm *abtfm;
724 } !! 193
725 !! 194 if (!crypto_mod_get(calg))
726 static int crypto_skcipher_init_tfm(struct cry !! 195 return -EAGAIN;
727 { !! 196
728 struct crypto_skcipher *skcipher = __c !! 197 abtfm = __crypto_alloc_tfm(calg, 0, 0);
729 struct skcipher_alg *alg = crypto_skci !! 198 if (IS_ERR(abtfm)) {
730 !! 199 crypto_mod_put(calg);
731 skcipher_set_needkey(skcipher); !! 200 return PTR_ERR(abtfm);
732 !! 201 }
733 if (tfm->__crt_alg->cra_type != &crypt !! 202
734 unsigned am = crypto_skcipher_ !! 203 ablkcipher = __crypto_ablkcipher_cast(abtfm);
735 unsigned reqsize; !! 204 *ctx = ablkcipher;
736 !! 205 tfm->exit = crypto_exit_skcipher_ops_ablkcipher;
737 reqsize = am & ~(crypto_tfm_ct !! 206
738 reqsize += crypto_skcipher_ivs !! 207 skcipher->setkey = skcipher_setkey_ablkcipher;
739 reqsize += crypto_skcipher_sta !! 208 skcipher->encrypt = skcipher_encrypt_ablkcipher;
740 crypto_skcipher_set_reqsize(sk !! 209 skcipher->decrypt = skcipher_decrypt_ablkcipher;
741 !! 210
742 return crypto_init_lskcipher_o !! 211 skcipher->ivsize = crypto_ablkcipher_ivsize(ablkcipher);
743 } !! 212 skcipher->reqsize = crypto_ablkcipher_reqsize(ablkcipher) +
744 !! 213 sizeof(struct ablkcipher_request);
745 if (alg->exit) !! 214 skcipher->has_setkey = calg->cra_ablkcipher.max_keysize;
746 skcipher->base.exit = crypto_s <<
747 <<
748 if (alg->init) <<
749 return alg->init(skcipher); <<
750 215
751 return 0; 216 return 0;
752 } 217 }
753 218
754 static unsigned int crypto_skcipher_extsize(st !! 219 static int crypto_skcipher_init_tfm(struct crypto_tfm *tfm)
755 { <<
756 if (alg->cra_type != &crypto_skcipher_ <<
757 return sizeof(struct crypto_ls <<
758 <<
759 return crypto_alg_extsize(alg); <<
760 } <<
761 <<
762 static void crypto_skcipher_free_instance(stru <<
763 { <<
764 struct skcipher_instance *skcipher = <<
765 container_of(inst, struct skci <<
766 <<
767 skcipher->free(skcipher); <<
768 } <<
769 <<
770 static void crypto_skcipher_show(struct seq_fi <<
771 __maybe_unused; <<
772 static void crypto_skcipher_show(struct seq_fi <<
773 { <<
774 struct skcipher_alg *skcipher = __cryp <<
775 <<
776 seq_printf(m, "type : skcipher <<
777 seq_printf(m, "async : %s\n", <<
778 alg->cra_flags & CRYPTO_ALG <<
779 seq_printf(m, "blocksize : %u\n", a <<
780 seq_printf(m, "min keysize : %u\n", s <<
781 seq_printf(m, "max keysize : %u\n", s <<
782 seq_printf(m, "ivsize : %u\n", s <<
783 seq_printf(m, "chunksize : %u\n", s <<
784 seq_printf(m, "walksize : %u\n", s <<
785 seq_printf(m, "statesize : %u\n", s <<
786 } <<
787 <<
788 static int __maybe_unused crypto_skcipher_repo <<
789 struct sk_buff *skb, struct crypto_alg <<
790 { 220 {
791 struct skcipher_alg *skcipher = __cryp !! 221 if (tfm->__crt_alg->cra_type == &crypto_blkcipher_type)
792 struct crypto_report_blkcipher rblkcip !! 222 return crypto_init_skcipher_ops_blkcipher(tfm);
793 223
794 memset(&rblkcipher, 0, sizeof(rblkciph !! 224 BUG_ON(tfm->__crt_alg->cra_type != &crypto_ablkcipher_type &&
>> 225 tfm->__crt_alg->cra_type != &crypto_givcipher_type);
795 226
796 strscpy(rblkcipher.type, "skcipher", s !! 227 return crypto_init_skcipher_ops_ablkcipher(tfm);
797 strscpy(rblkcipher.geniv, "<none>", si <<
798 <<
799 rblkcipher.blocksize = alg->cra_blocks <<
800 rblkcipher.min_keysize = skcipher->min <<
801 rblkcipher.max_keysize = skcipher->max <<
802 rblkcipher.ivsize = skcipher->ivsize; <<
803 <<
804 return nla_put(skb, CRYPTOCFGA_REPORT_ <<
805 sizeof(rblkcipher), &rb <<
806 } 228 }
807 229
808 static const struct crypto_type crypto_skciphe !! 230 static const struct crypto_type crypto_skcipher_type2 = {
809 .extsize = crypto_skcipher_extsize, 231 .extsize = crypto_skcipher_extsize,
810 .init_tfm = crypto_skcipher_init_tfm, 232 .init_tfm = crypto_skcipher_init_tfm,
811 .free = crypto_skcipher_free_instance, <<
812 #ifdef CONFIG_PROC_FS <<
813 .show = crypto_skcipher_show, <<
814 #endif <<
815 #if IS_ENABLED(CONFIG_CRYPTO_USER) <<
816 .report = crypto_skcipher_report, <<
817 #endif <<
818 .maskclear = ~CRYPTO_ALG_TYPE_MASK, 233 .maskclear = ~CRYPTO_ALG_TYPE_MASK,
819 .maskset = CRYPTO_ALG_TYPE_SKCIPHER_MA !! 234 .maskset = CRYPTO_ALG_TYPE_BLKCIPHER_MASK,
820 .type = CRYPTO_ALG_TYPE_SKCIPHER, !! 235 .type = CRYPTO_ALG_TYPE_BLKCIPHER,
821 .tfmsize = offsetof(struct crypto_skci 236 .tfmsize = offsetof(struct crypto_skcipher, base),
822 }; 237 };
823 238
824 int crypto_grab_skcipher(struct crypto_skciphe <<
825 struct crypto_instanc <<
826 const char *name, u32 <<
827 { <<
828 spawn->base.frontend = &crypto_skciphe <<
829 return crypto_grab_spawn(&spawn->base, <<
830 } <<
831 EXPORT_SYMBOL_GPL(crypto_grab_skcipher); <<
832 <<
833 struct crypto_skcipher *crypto_alloc_skcipher( 239 struct crypto_skcipher *crypto_alloc_skcipher(const char *alg_name,
834 240 u32 type, u32 mask)
835 { 241 {
836 return crypto_alloc_tfm(alg_name, &cry !! 242 return crypto_alloc_tfm(alg_name, &crypto_skcipher_type2, type, mask);
837 } 243 }
838 EXPORT_SYMBOL_GPL(crypto_alloc_skcipher); 244 EXPORT_SYMBOL_GPL(crypto_alloc_skcipher);
839 245
840 struct crypto_sync_skcipher *crypto_alloc_sync <<
841 const char *al <<
842 { <<
843 struct crypto_skcipher *tfm; <<
844 <<
845 /* Only sync algorithms allowed. */ <<
846 mask |= CRYPTO_ALG_ASYNC | CRYPTO_ALG_ <<
847 <<
848 tfm = crypto_alloc_tfm(alg_name, &cryp <<
849 <<
850 /* <<
851 * Make sure we do not allocate someth <<
852 * an on-stack request: check the requ <<
853 */ <<
854 if (!IS_ERR(tfm) && WARN_ON(crypto_skc <<
855 MAX_SYNC_S <<
856 crypto_free_skcipher(tfm); <<
857 return ERR_PTR(-EINVAL); <<
858 } <<
859 <<
860 return (struct crypto_sync_skcipher *) <<
861 } <<
862 EXPORT_SYMBOL_GPL(crypto_alloc_sync_skcipher); <<
863 <<
864 int crypto_has_skcipher(const char *alg_name, <<
865 { <<
866 return crypto_type_has_alg(alg_name, & <<
867 } <<
868 EXPORT_SYMBOL_GPL(crypto_has_skcipher); <<
869 <<
870 int skcipher_prepare_alg_common(struct skciphe <<
871 { <<
872 struct crypto_alg *base = &alg->base; <<
873 <<
874 if (alg->ivsize > PAGE_SIZE / 8 || alg <<
875 alg->statesize > PAGE_SIZE / 2 || <<
876 (alg->ivsize + alg->statesize) > P <<
877 return -EINVAL; <<
878 <<
879 if (!alg->chunksize) <<
880 alg->chunksize = base->cra_blo <<
881 <<
882 base->cra_flags &= ~CRYPTO_ALG_TYPE_MA <<
883 <<
884 return 0; <<
885 } <<
886 <<
887 static int skcipher_prepare_alg(struct skciphe <<
888 { <<
889 struct crypto_alg *base = &alg->base; <<
890 int err; <<
891 <<
892 err = skcipher_prepare_alg_common(&alg <<
893 if (err) <<
894 return err; <<
895 <<
896 if (alg->walksize > PAGE_SIZE / 8) <<
897 return -EINVAL; <<
898 <<
899 if (!alg->walksize) <<
900 alg->walksize = alg->chunksize <<
901 <<
902 if (!alg->statesize) { <<
903 alg->import = skcipher_noimpor <<
904 alg->export = skcipher_noexpor <<
905 } else if (!(alg->import && alg->expor <<
906 return -EINVAL; <<
907 <<
908 base->cra_type = &crypto_skcipher_type <<
909 base->cra_flags |= CRYPTO_ALG_TYPE_SKC <<
910 <<
911 return 0; <<
912 } <<
913 <<
914 int crypto_register_skcipher(struct skcipher_a <<
915 { <<
916 struct crypto_alg *base = &alg->base; <<
917 int err; <<
918 <<
919 err = skcipher_prepare_alg(alg); <<
920 if (err) <<
921 return err; <<
922 <<
923 return crypto_register_alg(base); <<
924 } <<
925 EXPORT_SYMBOL_GPL(crypto_register_skcipher); <<
926 <<
927 void crypto_unregister_skcipher(struct skciphe <<
928 { <<
929 crypto_unregister_alg(&alg->base); <<
930 } <<
931 EXPORT_SYMBOL_GPL(crypto_unregister_skcipher); <<
932 <<
933 int crypto_register_skciphers(struct skcipher_ <<
934 { <<
935 int i, ret; <<
936 <<
937 for (i = 0; i < count; i++) { <<
938 ret = crypto_register_skcipher <<
939 if (ret) <<
940 goto err; <<
941 } <<
942 <<
943 return 0; <<
944 <<
945 err: <<
946 for (--i; i >= 0; --i) <<
947 crypto_unregister_skcipher(&al <<
948 <<
949 return ret; <<
950 } <<
951 EXPORT_SYMBOL_GPL(crypto_register_skciphers); <<
952 <<
953 void crypto_unregister_skciphers(struct skciph <<
954 { <<
955 int i; <<
956 <<
957 for (i = count - 1; i >= 0; --i) <<
958 crypto_unregister_skcipher(&al <<
959 } <<
960 EXPORT_SYMBOL_GPL(crypto_unregister_skciphers) <<
961 <<
962 int skcipher_register_instance(struct crypto_t <<
963 struct skcipher_ins <<
964 { <<
965 int err; <<
966 <<
967 if (WARN_ON(!inst->free)) <<
968 return -EINVAL; <<
969 <<
970 err = skcipher_prepare_alg(&inst->alg) <<
971 if (err) <<
972 return err; <<
973 <<
974 return crypto_register_instance(tmpl, <<
975 } <<
976 EXPORT_SYMBOL_GPL(skcipher_register_instance); <<
977 <<
978 static int skcipher_setkey_simple(struct crypt <<
979 unsigned int <<
980 { <<
981 struct crypto_cipher *cipher = skciphe <<
982 <<
983 crypto_cipher_clear_flags(cipher, CRYP <<
984 crypto_cipher_set_flags(cipher, crypto <<
985 CRYPTO_TFM_REQ <<
986 return crypto_cipher_setkey(cipher, ke <<
987 } <<
988 <<
989 static int skcipher_init_tfm_simple(struct cry <<
990 { <<
991 struct skcipher_instance *inst = skcip <<
992 struct crypto_cipher_spawn *spawn = sk <<
993 struct skcipher_ctx_simple *ctx = cryp <<
994 struct crypto_cipher *cipher; <<
995 <<
996 cipher = crypto_spawn_cipher(spawn); <<
997 if (IS_ERR(cipher)) <<
998 return PTR_ERR(cipher); <<
999 <<
1000 ctx->cipher = cipher; <<
1001 return 0; <<
1002 } <<
1003 <<
1004 static void skcipher_exit_tfm_simple(struct c <<
1005 { <<
1006 struct skcipher_ctx_simple *ctx = cry <<
1007 <<
1008 crypto_free_cipher(ctx->cipher); <<
1009 } <<
1010 <<
1011 static void skcipher_free_instance_simple(str <<
1012 { <<
1013 crypto_drop_cipher(skcipher_instance_ <<
1014 kfree(inst); <<
1015 } <<
1016 <<
1017 /** <<
1018 * skcipher_alloc_instance_simple - allocate <<
1019 * <<
1020 * Allocate an skcipher_instance for a simple <<
1021 * e.g. cbc or ecb. The instance context wil <<
1022 * that for the underlying cipher. The {min, <<
1023 * alignmask, and priority are set from the u <<
1024 * overridden if needed. The tfm context def <<
1025 * default ->setkey(), ->init(), and ->exit() <<
1026 * <<
1027 * @tmpl: the template being instantiated <<
1028 * @tb: the template parameters <<
1029 * <<
1030 * Return: a pointer to the new instance, or <<
1031 * needs to register the instance. <<
1032 */ <<
1033 struct skcipher_instance *skcipher_alloc_inst <<
1034 struct crypto_template *tmpl, struct <<
1035 { <<
1036 u32 mask; <<
1037 struct skcipher_instance *inst; <<
1038 struct crypto_cipher_spawn *spawn; <<
1039 struct crypto_alg *cipher_alg; <<
1040 int err; <<
1041 <<
1042 err = crypto_check_attr_type(tb, CRYP <<
1043 if (err) <<
1044 return ERR_PTR(err); <<
1045 <<
1046 inst = kzalloc(sizeof(*inst) + sizeof <<
1047 if (!inst) <<
1048 return ERR_PTR(-ENOMEM); <<
1049 spawn = skcipher_instance_ctx(inst); <<
1050 <<
1051 err = crypto_grab_cipher(spawn, skcip <<
1052 crypto_attr_ <<
1053 if (err) <<
1054 goto err_free_inst; <<
1055 cipher_alg = crypto_spawn_cipher_alg( <<
1056 <<
1057 err = crypto_inst_setname(skcipher_cr <<
1058 cipher_alg) <<
1059 if (err) <<
1060 goto err_free_inst; <<
1061 <<
1062 inst->free = skcipher_free_instance_s <<
1063 <<
1064 /* Default algorithm properties, can <<
1065 inst->alg.base.cra_blocksize = cipher <<
1066 inst->alg.base.cra_alignmask = cipher <<
1067 inst->alg.base.cra_priority = cipher_ <<
1068 inst->alg.min_keysize = cipher_alg->c <<
1069 inst->alg.max_keysize = cipher_alg->c <<
1070 inst->alg.ivsize = cipher_alg->cra_bl <<
1071 <<
1072 /* Use skcipher_ctx_simple by default <<
1073 inst->alg.base.cra_ctxsize = sizeof(s <<
1074 inst->alg.setkey = skcipher_setkey_si <<
1075 inst->alg.init = skcipher_init_tfm_si <<
1076 inst->alg.exit = skcipher_exit_tfm_si <<
1077 <<
1078 return inst; <<
1079 <<
1080 err_free_inst: <<
1081 skcipher_free_instance_simple(inst); <<
1082 return ERR_PTR(err); <<
1083 } <<
1084 EXPORT_SYMBOL_GPL(skcipher_alloc_instance_sim <<
1085 <<
1086 MODULE_LICENSE("GPL"); 246 MODULE_LICENSE("GPL");
1087 MODULE_DESCRIPTION("Symmetric key cipher type 247 MODULE_DESCRIPTION("Symmetric key cipher type");
1088 MODULE_IMPORT_NS(CRYPTO_INTERNAL); <<
1089 248
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