Version:  2.0.40 2.2.26 2.4.37 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16

Linux/include/linux/crypto.h

  1 /*
  2  * Scatterlist Cryptographic API.
  3  *
  4  * Copyright (c) 2002 James Morris <jmorris@intercode.com.au>
  5  * Copyright (c) 2002 David S. Miller (davem@redhat.com)
  6  * Copyright (c) 2005 Herbert Xu <herbert@gondor.apana.org.au>
  7  *
  8  * Portions derived from Cryptoapi, by Alexander Kjeldaas <astor@fast.no>
  9  * and Nettle, by Niels Möller.
 10  * 
 11  * This program is free software; you can redistribute it and/or modify it
 12  * under the terms of the GNU General Public License as published by the Free
 13  * Software Foundation; either version 2 of the License, or (at your option) 
 14  * any later version.
 15  *
 16  */
 17 #ifndef _LINUX_CRYPTO_H
 18 #define _LINUX_CRYPTO_H
 19 
 20 #include <linux/atomic.h>
 21 #include <linux/kernel.h>
 22 #include <linux/list.h>
 23 #include <linux/bug.h>
 24 #include <linux/slab.h>
 25 #include <linux/string.h>
 26 #include <linux/uaccess.h>
 27 
 28 /*
 29  * Algorithm masks and types.
 30  */
 31 #define CRYPTO_ALG_TYPE_MASK            0x0000000f
 32 #define CRYPTO_ALG_TYPE_CIPHER          0x00000001
 33 #define CRYPTO_ALG_TYPE_COMPRESS        0x00000002
 34 #define CRYPTO_ALG_TYPE_AEAD            0x00000003
 35 #define CRYPTO_ALG_TYPE_BLKCIPHER       0x00000004
 36 #define CRYPTO_ALG_TYPE_ABLKCIPHER      0x00000005
 37 #define CRYPTO_ALG_TYPE_GIVCIPHER       0x00000006
 38 #define CRYPTO_ALG_TYPE_DIGEST          0x00000008
 39 #define CRYPTO_ALG_TYPE_HASH            0x00000008
 40 #define CRYPTO_ALG_TYPE_SHASH           0x00000009
 41 #define CRYPTO_ALG_TYPE_AHASH           0x0000000a
 42 #define CRYPTO_ALG_TYPE_RNG             0x0000000c
 43 #define CRYPTO_ALG_TYPE_PCOMPRESS       0x0000000f
 44 
 45 #define CRYPTO_ALG_TYPE_HASH_MASK       0x0000000e
 46 #define CRYPTO_ALG_TYPE_AHASH_MASK      0x0000000c
 47 #define CRYPTO_ALG_TYPE_BLKCIPHER_MASK  0x0000000c
 48 
 49 #define CRYPTO_ALG_LARVAL               0x00000010
 50 #define CRYPTO_ALG_DEAD                 0x00000020
 51 #define CRYPTO_ALG_DYING                0x00000040
 52 #define CRYPTO_ALG_ASYNC                0x00000080
 53 
 54 /*
 55  * Set this bit if and only if the algorithm requires another algorithm of
 56  * the same type to handle corner cases.
 57  */
 58 #define CRYPTO_ALG_NEED_FALLBACK        0x00000100
 59 
 60 /*
 61  * This bit is set for symmetric key ciphers that have already been wrapped
 62  * with a generic IV generator to prevent them from being wrapped again.
 63  */
 64 #define CRYPTO_ALG_GENIV                0x00000200
 65 
 66 /*
 67  * Set if the algorithm has passed automated run-time testing.  Note that
 68  * if there is no run-time testing for a given algorithm it is considered
 69  * to have passed.
 70  */
 71 
 72 #define CRYPTO_ALG_TESTED               0x00000400
 73 
 74 /*
 75  * Set if the algorithm is an instance that is build from templates.
 76  */
 77 #define CRYPTO_ALG_INSTANCE             0x00000800
 78 
 79 /* Set this bit if the algorithm provided is hardware accelerated but
 80  * not available to userspace via instruction set or so.
 81  */
 82 #define CRYPTO_ALG_KERN_DRIVER_ONLY     0x00001000
 83 
 84 /*
 85  * Transform masks and values (for crt_flags).
 86  */
 87 #define CRYPTO_TFM_REQ_MASK             0x000fff00
 88 #define CRYPTO_TFM_RES_MASK             0xfff00000
 89 
 90 #define CRYPTO_TFM_REQ_WEAK_KEY         0x00000100
 91 #define CRYPTO_TFM_REQ_MAY_SLEEP        0x00000200
 92 #define CRYPTO_TFM_REQ_MAY_BACKLOG      0x00000400
 93 #define CRYPTO_TFM_RES_WEAK_KEY         0x00100000
 94 #define CRYPTO_TFM_RES_BAD_KEY_LEN      0x00200000
 95 #define CRYPTO_TFM_RES_BAD_KEY_SCHED    0x00400000
 96 #define CRYPTO_TFM_RES_BAD_BLOCK_LEN    0x00800000
 97 #define CRYPTO_TFM_RES_BAD_FLAGS        0x01000000
 98 
 99 /*
100  * Miscellaneous stuff.
101  */
102 #define CRYPTO_MAX_ALG_NAME             64
103 
104 /*
105  * The macro CRYPTO_MINALIGN_ATTR (along with the void * type in the actual
106  * declaration) is used to ensure that the crypto_tfm context structure is
107  * aligned correctly for the given architecture so that there are no alignment
108  * faults for C data types.  In particular, this is required on platforms such
109  * as arm where pointers are 32-bit aligned but there are data types such as
110  * u64 which require 64-bit alignment.
111  */
112 #define CRYPTO_MINALIGN ARCH_KMALLOC_MINALIGN
113 
114 #define CRYPTO_MINALIGN_ATTR __attribute__ ((__aligned__(CRYPTO_MINALIGN)))
115 
116 struct scatterlist;
117 struct crypto_ablkcipher;
118 struct crypto_async_request;
119 struct crypto_aead;
120 struct crypto_blkcipher;
121 struct crypto_hash;
122 struct crypto_rng;
123 struct crypto_tfm;
124 struct crypto_type;
125 struct aead_givcrypt_request;
126 struct skcipher_givcrypt_request;
127 
128 typedef void (*crypto_completion_t)(struct crypto_async_request *req, int err);
129 
130 struct crypto_async_request {
131         struct list_head list;
132         crypto_completion_t complete;
133         void *data;
134         struct crypto_tfm *tfm;
135 
136         u32 flags;
137 };
138 
139 struct ablkcipher_request {
140         struct crypto_async_request base;
141 
142         unsigned int nbytes;
143 
144         void *info;
145 
146         struct scatterlist *src;
147         struct scatterlist *dst;
148 
149         void *__ctx[] CRYPTO_MINALIGN_ATTR;
150 };
151 
152 /**
153  *      struct aead_request - AEAD request
154  *      @base: Common attributes for async crypto requests
155  *      @assoclen: Length in bytes of associated data for authentication
156  *      @cryptlen: Length of data to be encrypted or decrypted
157  *      @iv: Initialisation vector
158  *      @assoc: Associated data
159  *      @src: Source data
160  *      @dst: Destination data
161  *      @__ctx: Start of private context data
162  */
163 struct aead_request {
164         struct crypto_async_request base;
165 
166         unsigned int assoclen;
167         unsigned int cryptlen;
168 
169         u8 *iv;
170 
171         struct scatterlist *assoc;
172         struct scatterlist *src;
173         struct scatterlist *dst;
174 
175         void *__ctx[] CRYPTO_MINALIGN_ATTR;
176 };
177 
178 struct blkcipher_desc {
179         struct crypto_blkcipher *tfm;
180         void *info;
181         u32 flags;
182 };
183 
184 struct cipher_desc {
185         struct crypto_tfm *tfm;
186         void (*crfn)(struct crypto_tfm *tfm, u8 *dst, const u8 *src);
187         unsigned int (*prfn)(const struct cipher_desc *desc, u8 *dst,
188                              const u8 *src, unsigned int nbytes);
189         void *info;
190 };
191 
192 struct hash_desc {
193         struct crypto_hash *tfm;
194         u32 flags;
195 };
196 
197 /*
198  * Algorithms: modular crypto algorithm implementations, managed
199  * via crypto_register_alg() and crypto_unregister_alg().
200  */
201 struct ablkcipher_alg {
202         int (*setkey)(struct crypto_ablkcipher *tfm, const u8 *key,
203                       unsigned int keylen);
204         int (*encrypt)(struct ablkcipher_request *req);
205         int (*decrypt)(struct ablkcipher_request *req);
206         int (*givencrypt)(struct skcipher_givcrypt_request *req);
207         int (*givdecrypt)(struct skcipher_givcrypt_request *req);
208 
209         const char *geniv;
210 
211         unsigned int min_keysize;
212         unsigned int max_keysize;
213         unsigned int ivsize;
214 };
215 
216 struct aead_alg {
217         int (*setkey)(struct crypto_aead *tfm, const u8 *key,
218                       unsigned int keylen);
219         int (*setauthsize)(struct crypto_aead *tfm, unsigned int authsize);
220         int (*encrypt)(struct aead_request *req);
221         int (*decrypt)(struct aead_request *req);
222         int (*givencrypt)(struct aead_givcrypt_request *req);
223         int (*givdecrypt)(struct aead_givcrypt_request *req);
224 
225         const char *geniv;
226 
227         unsigned int ivsize;
228         unsigned int maxauthsize;
229 };
230 
231 struct blkcipher_alg {
232         int (*setkey)(struct crypto_tfm *tfm, const u8 *key,
233                       unsigned int keylen);
234         int (*encrypt)(struct blkcipher_desc *desc,
235                        struct scatterlist *dst, struct scatterlist *src,
236                        unsigned int nbytes);
237         int (*decrypt)(struct blkcipher_desc *desc,
238                        struct scatterlist *dst, struct scatterlist *src,
239                        unsigned int nbytes);
240 
241         const char *geniv;
242 
243         unsigned int min_keysize;
244         unsigned int max_keysize;
245         unsigned int ivsize;
246 };
247 
248 struct cipher_alg {
249         unsigned int cia_min_keysize;
250         unsigned int cia_max_keysize;
251         int (*cia_setkey)(struct crypto_tfm *tfm, const u8 *key,
252                           unsigned int keylen);
253         void (*cia_encrypt)(struct crypto_tfm *tfm, u8 *dst, const u8 *src);
254         void (*cia_decrypt)(struct crypto_tfm *tfm, u8 *dst, const u8 *src);
255 };
256 
257 struct compress_alg {
258         int (*coa_compress)(struct crypto_tfm *tfm, const u8 *src,
259                             unsigned int slen, u8 *dst, unsigned int *dlen);
260         int (*coa_decompress)(struct crypto_tfm *tfm, const u8 *src,
261                               unsigned int slen, u8 *dst, unsigned int *dlen);
262 };
263 
264 struct rng_alg {
265         int (*rng_make_random)(struct crypto_rng *tfm, u8 *rdata,
266                                unsigned int dlen);
267         int (*rng_reset)(struct crypto_rng *tfm, u8 *seed, unsigned int slen);
268 
269         unsigned int seedsize;
270 };
271 
272 
273 #define cra_ablkcipher  cra_u.ablkcipher
274 #define cra_aead        cra_u.aead
275 #define cra_blkcipher   cra_u.blkcipher
276 #define cra_cipher      cra_u.cipher
277 #define cra_compress    cra_u.compress
278 #define cra_rng         cra_u.rng
279 
280 struct crypto_alg {
281         struct list_head cra_list;
282         struct list_head cra_users;
283 
284         u32 cra_flags;
285         unsigned int cra_blocksize;
286         unsigned int cra_ctxsize;
287         unsigned int cra_alignmask;
288 
289         int cra_priority;
290         atomic_t cra_refcnt;
291 
292         char cra_name[CRYPTO_MAX_ALG_NAME];
293         char cra_driver_name[CRYPTO_MAX_ALG_NAME];
294 
295         const struct crypto_type *cra_type;
296 
297         union {
298                 struct ablkcipher_alg ablkcipher;
299                 struct aead_alg aead;
300                 struct blkcipher_alg blkcipher;
301                 struct cipher_alg cipher;
302                 struct compress_alg compress;
303                 struct rng_alg rng;
304         } cra_u;
305 
306         int (*cra_init)(struct crypto_tfm *tfm);
307         void (*cra_exit)(struct crypto_tfm *tfm);
308         void (*cra_destroy)(struct crypto_alg *alg);
309         
310         struct module *cra_module;
311 };
312 
313 /*
314  * Algorithm registration interface.
315  */
316 int crypto_register_alg(struct crypto_alg *alg);
317 int crypto_unregister_alg(struct crypto_alg *alg);
318 int crypto_register_algs(struct crypto_alg *algs, int count);
319 int crypto_unregister_algs(struct crypto_alg *algs, int count);
320 
321 /*
322  * Algorithm query interface.
323  */
324 int crypto_has_alg(const char *name, u32 type, u32 mask);
325 
326 /*
327  * Transforms: user-instantiated objects which encapsulate algorithms
328  * and core processing logic.  Managed via crypto_alloc_*() and
329  * crypto_free_*(), as well as the various helpers below.
330  */
331 
332 struct ablkcipher_tfm {
333         int (*setkey)(struct crypto_ablkcipher *tfm, const u8 *key,
334                       unsigned int keylen);
335         int (*encrypt)(struct ablkcipher_request *req);
336         int (*decrypt)(struct ablkcipher_request *req);
337         int (*givencrypt)(struct skcipher_givcrypt_request *req);
338         int (*givdecrypt)(struct skcipher_givcrypt_request *req);
339 
340         struct crypto_ablkcipher *base;
341 
342         unsigned int ivsize;
343         unsigned int reqsize;
344 };
345 
346 struct aead_tfm {
347         int (*setkey)(struct crypto_aead *tfm, const u8 *key,
348                       unsigned int keylen);
349         int (*encrypt)(struct aead_request *req);
350         int (*decrypt)(struct aead_request *req);
351         int (*givencrypt)(struct aead_givcrypt_request *req);
352         int (*givdecrypt)(struct aead_givcrypt_request *req);
353 
354         struct crypto_aead *base;
355 
356         unsigned int ivsize;
357         unsigned int authsize;
358         unsigned int reqsize;
359 };
360 
361 struct blkcipher_tfm {
362         void *iv;
363         int (*setkey)(struct crypto_tfm *tfm, const u8 *key,
364                       unsigned int keylen);
365         int (*encrypt)(struct blkcipher_desc *desc, struct scatterlist *dst,
366                        struct scatterlist *src, unsigned int nbytes);
367         int (*decrypt)(struct blkcipher_desc *desc, struct scatterlist *dst,
368                        struct scatterlist *src, unsigned int nbytes);
369 };
370 
371 struct cipher_tfm {
372         int (*cit_setkey)(struct crypto_tfm *tfm,
373                           const u8 *key, unsigned int keylen);
374         void (*cit_encrypt_one)(struct crypto_tfm *tfm, u8 *dst, const u8 *src);
375         void (*cit_decrypt_one)(struct crypto_tfm *tfm, u8 *dst, const u8 *src);
376 };
377 
378 struct hash_tfm {
379         int (*init)(struct hash_desc *desc);
380         int (*update)(struct hash_desc *desc,
381                       struct scatterlist *sg, unsigned int nsg);
382         int (*final)(struct hash_desc *desc, u8 *out);
383         int (*digest)(struct hash_desc *desc, struct scatterlist *sg,
384                       unsigned int nsg, u8 *out);
385         int (*setkey)(struct crypto_hash *tfm, const u8 *key,
386                       unsigned int keylen);
387         unsigned int digestsize;
388 };
389 
390 struct compress_tfm {
391         int (*cot_compress)(struct crypto_tfm *tfm,
392                             const u8 *src, unsigned int slen,
393                             u8 *dst, unsigned int *dlen);
394         int (*cot_decompress)(struct crypto_tfm *tfm,
395                               const u8 *src, unsigned int slen,
396                               u8 *dst, unsigned int *dlen);
397 };
398 
399 struct rng_tfm {
400         int (*rng_gen_random)(struct crypto_rng *tfm, u8 *rdata,
401                               unsigned int dlen);
402         int (*rng_reset)(struct crypto_rng *tfm, u8 *seed, unsigned int slen);
403 };
404 
405 #define crt_ablkcipher  crt_u.ablkcipher
406 #define crt_aead        crt_u.aead
407 #define crt_blkcipher   crt_u.blkcipher
408 #define crt_cipher      crt_u.cipher
409 #define crt_hash        crt_u.hash
410 #define crt_compress    crt_u.compress
411 #define crt_rng         crt_u.rng
412 
413 struct crypto_tfm {
414 
415         u32 crt_flags;
416         
417         union {
418                 struct ablkcipher_tfm ablkcipher;
419                 struct aead_tfm aead;
420                 struct blkcipher_tfm blkcipher;
421                 struct cipher_tfm cipher;
422                 struct hash_tfm hash;
423                 struct compress_tfm compress;
424                 struct rng_tfm rng;
425         } crt_u;
426 
427         void (*exit)(struct crypto_tfm *tfm);
428         
429         struct crypto_alg *__crt_alg;
430 
431         void *__crt_ctx[] CRYPTO_MINALIGN_ATTR;
432 };
433 
434 struct crypto_ablkcipher {
435         struct crypto_tfm base;
436 };
437 
438 struct crypto_aead {
439         struct crypto_tfm base;
440 };
441 
442 struct crypto_blkcipher {
443         struct crypto_tfm base;
444 };
445 
446 struct crypto_cipher {
447         struct crypto_tfm base;
448 };
449 
450 struct crypto_comp {
451         struct crypto_tfm base;
452 };
453 
454 struct crypto_hash {
455         struct crypto_tfm base;
456 };
457 
458 struct crypto_rng {
459         struct crypto_tfm base;
460 };
461 
462 enum {
463         CRYPTOA_UNSPEC,
464         CRYPTOA_ALG,
465         CRYPTOA_TYPE,
466         CRYPTOA_U32,
467         __CRYPTOA_MAX,
468 };
469 
470 #define CRYPTOA_MAX (__CRYPTOA_MAX - 1)
471 
472 /* Maximum number of (rtattr) parameters for each template. */
473 #define CRYPTO_MAX_ATTRS 32
474 
475 struct crypto_attr_alg {
476         char name[CRYPTO_MAX_ALG_NAME];
477 };
478 
479 struct crypto_attr_type {
480         u32 type;
481         u32 mask;
482 };
483 
484 struct crypto_attr_u32 {
485         u32 num;
486 };
487 
488 /* 
489  * Transform user interface.
490  */
491  
492 struct crypto_tfm *crypto_alloc_base(const char *alg_name, u32 type, u32 mask);
493 void crypto_destroy_tfm(void *mem, struct crypto_tfm *tfm);
494 
495 static inline void crypto_free_tfm(struct crypto_tfm *tfm)
496 {
497         return crypto_destroy_tfm(tfm, tfm);
498 }
499 
500 int alg_test(const char *driver, const char *alg, u32 type, u32 mask);
501 
502 /*
503  * Transform helpers which query the underlying algorithm.
504  */
505 static inline const char *crypto_tfm_alg_name(struct crypto_tfm *tfm)
506 {
507         return tfm->__crt_alg->cra_name;
508 }
509 
510 static inline const char *crypto_tfm_alg_driver_name(struct crypto_tfm *tfm)
511 {
512         return tfm->__crt_alg->cra_driver_name;
513 }
514 
515 static inline int crypto_tfm_alg_priority(struct crypto_tfm *tfm)
516 {
517         return tfm->__crt_alg->cra_priority;
518 }
519 
520 static inline u32 crypto_tfm_alg_type(struct crypto_tfm *tfm)
521 {
522         return tfm->__crt_alg->cra_flags & CRYPTO_ALG_TYPE_MASK;
523 }
524 
525 static inline unsigned int crypto_tfm_alg_blocksize(struct crypto_tfm *tfm)
526 {
527         return tfm->__crt_alg->cra_blocksize;
528 }
529 
530 static inline unsigned int crypto_tfm_alg_alignmask(struct crypto_tfm *tfm)
531 {
532         return tfm->__crt_alg->cra_alignmask;
533 }
534 
535 static inline u32 crypto_tfm_get_flags(struct crypto_tfm *tfm)
536 {
537         return tfm->crt_flags;
538 }
539 
540 static inline void crypto_tfm_set_flags(struct crypto_tfm *tfm, u32 flags)
541 {
542         tfm->crt_flags |= flags;
543 }
544 
545 static inline void crypto_tfm_clear_flags(struct crypto_tfm *tfm, u32 flags)
546 {
547         tfm->crt_flags &= ~flags;
548 }
549 
550 static inline void *crypto_tfm_ctx(struct crypto_tfm *tfm)
551 {
552         return tfm->__crt_ctx;
553 }
554 
555 static inline unsigned int crypto_tfm_ctx_alignment(void)
556 {
557         struct crypto_tfm *tfm;
558         return __alignof__(tfm->__crt_ctx);
559 }
560 
561 /*
562  * API wrappers.
563  */
564 static inline struct crypto_ablkcipher *__crypto_ablkcipher_cast(
565         struct crypto_tfm *tfm)
566 {
567         return (struct crypto_ablkcipher *)tfm;
568 }
569 
570 static inline u32 crypto_skcipher_type(u32 type)
571 {
572         type &= ~(CRYPTO_ALG_TYPE_MASK | CRYPTO_ALG_GENIV);
573         type |= CRYPTO_ALG_TYPE_BLKCIPHER;
574         return type;
575 }
576 
577 static inline u32 crypto_skcipher_mask(u32 mask)
578 {
579         mask &= ~(CRYPTO_ALG_TYPE_MASK | CRYPTO_ALG_GENIV);
580         mask |= CRYPTO_ALG_TYPE_BLKCIPHER_MASK;
581         return mask;
582 }
583 
584 struct crypto_ablkcipher *crypto_alloc_ablkcipher(const char *alg_name,
585                                                   u32 type, u32 mask);
586 
587 static inline struct crypto_tfm *crypto_ablkcipher_tfm(
588         struct crypto_ablkcipher *tfm)
589 {
590         return &tfm->base;
591 }
592 
593 static inline void crypto_free_ablkcipher(struct crypto_ablkcipher *tfm)
594 {
595         crypto_free_tfm(crypto_ablkcipher_tfm(tfm));
596 }
597 
598 static inline int crypto_has_ablkcipher(const char *alg_name, u32 type,
599                                         u32 mask)
600 {
601         return crypto_has_alg(alg_name, crypto_skcipher_type(type),
602                               crypto_skcipher_mask(mask));
603 }
604 
605 static inline struct ablkcipher_tfm *crypto_ablkcipher_crt(
606         struct crypto_ablkcipher *tfm)
607 {
608         return &crypto_ablkcipher_tfm(tfm)->crt_ablkcipher;
609 }
610 
611 static inline unsigned int crypto_ablkcipher_ivsize(
612         struct crypto_ablkcipher *tfm)
613 {
614         return crypto_ablkcipher_crt(tfm)->ivsize;
615 }
616 
617 static inline unsigned int crypto_ablkcipher_blocksize(
618         struct crypto_ablkcipher *tfm)
619 {
620         return crypto_tfm_alg_blocksize(crypto_ablkcipher_tfm(tfm));
621 }
622 
623 static inline unsigned int crypto_ablkcipher_alignmask(
624         struct crypto_ablkcipher *tfm)
625 {
626         return crypto_tfm_alg_alignmask(crypto_ablkcipher_tfm(tfm));
627 }
628 
629 static inline u32 crypto_ablkcipher_get_flags(struct crypto_ablkcipher *tfm)
630 {
631         return crypto_tfm_get_flags(crypto_ablkcipher_tfm(tfm));
632 }
633 
634 static inline void crypto_ablkcipher_set_flags(struct crypto_ablkcipher *tfm,
635                                                u32 flags)
636 {
637         crypto_tfm_set_flags(crypto_ablkcipher_tfm(tfm), flags);
638 }
639 
640 static inline void crypto_ablkcipher_clear_flags(struct crypto_ablkcipher *tfm,
641                                                  u32 flags)
642 {
643         crypto_tfm_clear_flags(crypto_ablkcipher_tfm(tfm), flags);
644 }
645 
646 static inline int crypto_ablkcipher_setkey(struct crypto_ablkcipher *tfm,
647                                            const u8 *key, unsigned int keylen)
648 {
649         struct ablkcipher_tfm *crt = crypto_ablkcipher_crt(tfm);
650 
651         return crt->setkey(crt->base, key, keylen);
652 }
653 
654 static inline struct crypto_ablkcipher *crypto_ablkcipher_reqtfm(
655         struct ablkcipher_request *req)
656 {
657         return __crypto_ablkcipher_cast(req->base.tfm);
658 }
659 
660 static inline int crypto_ablkcipher_encrypt(struct ablkcipher_request *req)
661 {
662         struct ablkcipher_tfm *crt =
663                 crypto_ablkcipher_crt(crypto_ablkcipher_reqtfm(req));
664         return crt->encrypt(req);
665 }
666 
667 static inline int crypto_ablkcipher_decrypt(struct ablkcipher_request *req)
668 {
669         struct ablkcipher_tfm *crt =
670                 crypto_ablkcipher_crt(crypto_ablkcipher_reqtfm(req));
671         return crt->decrypt(req);
672 }
673 
674 static inline unsigned int crypto_ablkcipher_reqsize(
675         struct crypto_ablkcipher *tfm)
676 {
677         return crypto_ablkcipher_crt(tfm)->reqsize;
678 }
679 
680 static inline void ablkcipher_request_set_tfm(
681         struct ablkcipher_request *req, struct crypto_ablkcipher *tfm)
682 {
683         req->base.tfm = crypto_ablkcipher_tfm(crypto_ablkcipher_crt(tfm)->base);
684 }
685 
686 static inline struct ablkcipher_request *ablkcipher_request_cast(
687         struct crypto_async_request *req)
688 {
689         return container_of(req, struct ablkcipher_request, base);
690 }
691 
692 static inline struct ablkcipher_request *ablkcipher_request_alloc(
693         struct crypto_ablkcipher *tfm, gfp_t gfp)
694 {
695         struct ablkcipher_request *req;
696 
697         req = kmalloc(sizeof(struct ablkcipher_request) +
698                       crypto_ablkcipher_reqsize(tfm), gfp);
699 
700         if (likely(req))
701                 ablkcipher_request_set_tfm(req, tfm);
702 
703         return req;
704 }
705 
706 static inline void ablkcipher_request_free(struct ablkcipher_request *req)
707 {
708         kzfree(req);
709 }
710 
711 static inline void ablkcipher_request_set_callback(
712         struct ablkcipher_request *req,
713         u32 flags, crypto_completion_t complete, void *data)
714 {
715         req->base.complete = complete;
716         req->base.data = data;
717         req->base.flags = flags;
718 }
719 
720 static inline void ablkcipher_request_set_crypt(
721         struct ablkcipher_request *req,
722         struct scatterlist *src, struct scatterlist *dst,
723         unsigned int nbytes, void *iv)
724 {
725         req->src = src;
726         req->dst = dst;
727         req->nbytes = nbytes;
728         req->info = iv;
729 }
730 
731 static inline struct crypto_aead *__crypto_aead_cast(struct crypto_tfm *tfm)
732 {
733         return (struct crypto_aead *)tfm;
734 }
735 
736 struct crypto_aead *crypto_alloc_aead(const char *alg_name, u32 type, u32 mask);
737 
738 static inline struct crypto_tfm *crypto_aead_tfm(struct crypto_aead *tfm)
739 {
740         return &tfm->base;
741 }
742 
743 static inline void crypto_free_aead(struct crypto_aead *tfm)
744 {
745         crypto_free_tfm(crypto_aead_tfm(tfm));
746 }
747 
748 static inline struct aead_tfm *crypto_aead_crt(struct crypto_aead *tfm)
749 {
750         return &crypto_aead_tfm(tfm)->crt_aead;
751 }
752 
753 static inline unsigned int crypto_aead_ivsize(struct crypto_aead *tfm)
754 {
755         return crypto_aead_crt(tfm)->ivsize;
756 }
757 
758 static inline unsigned int crypto_aead_authsize(struct crypto_aead *tfm)
759 {
760         return crypto_aead_crt(tfm)->authsize;
761 }
762 
763 static inline unsigned int crypto_aead_blocksize(struct crypto_aead *tfm)
764 {
765         return crypto_tfm_alg_blocksize(crypto_aead_tfm(tfm));
766 }
767 
768 static inline unsigned int crypto_aead_alignmask(struct crypto_aead *tfm)
769 {
770         return crypto_tfm_alg_alignmask(crypto_aead_tfm(tfm));
771 }
772 
773 static inline u32 crypto_aead_get_flags(struct crypto_aead *tfm)
774 {
775         return crypto_tfm_get_flags(crypto_aead_tfm(tfm));
776 }
777 
778 static inline void crypto_aead_set_flags(struct crypto_aead *tfm, u32 flags)
779 {
780         crypto_tfm_set_flags(crypto_aead_tfm(tfm), flags);
781 }
782 
783 static inline void crypto_aead_clear_flags(struct crypto_aead *tfm, u32 flags)
784 {
785         crypto_tfm_clear_flags(crypto_aead_tfm(tfm), flags);
786 }
787 
788 static inline int crypto_aead_setkey(struct crypto_aead *tfm, const u8 *key,
789                                      unsigned int keylen)
790 {
791         struct aead_tfm *crt = crypto_aead_crt(tfm);
792 
793         return crt->setkey(crt->base, key, keylen);
794 }
795 
796 int crypto_aead_setauthsize(struct crypto_aead *tfm, unsigned int authsize);
797 
798 static inline struct crypto_aead *crypto_aead_reqtfm(struct aead_request *req)
799 {
800         return __crypto_aead_cast(req->base.tfm);
801 }
802 
803 static inline int crypto_aead_encrypt(struct aead_request *req)
804 {
805         return crypto_aead_crt(crypto_aead_reqtfm(req))->encrypt(req);
806 }
807 
808 static inline int crypto_aead_decrypt(struct aead_request *req)
809 {
810         return crypto_aead_crt(crypto_aead_reqtfm(req))->decrypt(req);
811 }
812 
813 static inline unsigned int crypto_aead_reqsize(struct crypto_aead *tfm)
814 {
815         return crypto_aead_crt(tfm)->reqsize;
816 }
817 
818 static inline void aead_request_set_tfm(struct aead_request *req,
819                                         struct crypto_aead *tfm)
820 {
821         req->base.tfm = crypto_aead_tfm(crypto_aead_crt(tfm)->base);
822 }
823 
824 static inline struct aead_request *aead_request_alloc(struct crypto_aead *tfm,
825                                                       gfp_t gfp)
826 {
827         struct aead_request *req;
828 
829         req = kmalloc(sizeof(*req) + crypto_aead_reqsize(tfm), gfp);
830 
831         if (likely(req))
832                 aead_request_set_tfm(req, tfm);
833 
834         return req;
835 }
836 
837 static inline void aead_request_free(struct aead_request *req)
838 {
839         kzfree(req);
840 }
841 
842 static inline void aead_request_set_callback(struct aead_request *req,
843                                              u32 flags,
844                                              crypto_completion_t complete,
845                                              void *data)
846 {
847         req->base.complete = complete;
848         req->base.data = data;
849         req->base.flags = flags;
850 }
851 
852 static inline void aead_request_set_crypt(struct aead_request *req,
853                                           struct scatterlist *src,
854                                           struct scatterlist *dst,
855                                           unsigned int cryptlen, u8 *iv)
856 {
857         req->src = src;
858         req->dst = dst;
859         req->cryptlen = cryptlen;
860         req->iv = iv;
861 }
862 
863 static inline void aead_request_set_assoc(struct aead_request *req,
864                                           struct scatterlist *assoc,
865                                           unsigned int assoclen)
866 {
867         req->assoc = assoc;
868         req->assoclen = assoclen;
869 }
870 
871 static inline struct crypto_blkcipher *__crypto_blkcipher_cast(
872         struct crypto_tfm *tfm)
873 {
874         return (struct crypto_blkcipher *)tfm;
875 }
876 
877 static inline struct crypto_blkcipher *crypto_blkcipher_cast(
878         struct crypto_tfm *tfm)
879 {
880         BUG_ON(crypto_tfm_alg_type(tfm) != CRYPTO_ALG_TYPE_BLKCIPHER);
881         return __crypto_blkcipher_cast(tfm);
882 }
883 
884 static inline struct crypto_blkcipher *crypto_alloc_blkcipher(
885         const char *alg_name, u32 type, u32 mask)
886 {
887         type &= ~CRYPTO_ALG_TYPE_MASK;
888         type |= CRYPTO_ALG_TYPE_BLKCIPHER;
889         mask |= CRYPTO_ALG_TYPE_MASK;
890 
891         return __crypto_blkcipher_cast(crypto_alloc_base(alg_name, type, mask));
892 }
893 
894 static inline struct crypto_tfm *crypto_blkcipher_tfm(
895         struct crypto_blkcipher *tfm)
896 {
897         return &tfm->base;
898 }
899 
900 static inline void crypto_free_blkcipher(struct crypto_blkcipher *tfm)
901 {
902         crypto_free_tfm(crypto_blkcipher_tfm(tfm));
903 }
904 
905 static inline int crypto_has_blkcipher(const char *alg_name, u32 type, u32 mask)
906 {
907         type &= ~CRYPTO_ALG_TYPE_MASK;
908         type |= CRYPTO_ALG_TYPE_BLKCIPHER;
909         mask |= CRYPTO_ALG_TYPE_MASK;
910 
911         return crypto_has_alg(alg_name, type, mask);
912 }
913 
914 static inline const char *crypto_blkcipher_name(struct crypto_blkcipher *tfm)
915 {
916         return crypto_tfm_alg_name(crypto_blkcipher_tfm(tfm));
917 }
918 
919 static inline struct blkcipher_tfm *crypto_blkcipher_crt(
920         struct crypto_blkcipher *tfm)
921 {
922         return &crypto_blkcipher_tfm(tfm)->crt_blkcipher;
923 }
924 
925 static inline struct blkcipher_alg *crypto_blkcipher_alg(
926         struct crypto_blkcipher *tfm)
927 {
928         return &crypto_blkcipher_tfm(tfm)->__crt_alg->cra_blkcipher;
929 }
930 
931 static inline unsigned int crypto_blkcipher_ivsize(struct crypto_blkcipher *tfm)
932 {
933         return crypto_blkcipher_alg(tfm)->ivsize;
934 }
935 
936 static inline unsigned int crypto_blkcipher_blocksize(
937         struct crypto_blkcipher *tfm)
938 {
939         return crypto_tfm_alg_blocksize(crypto_blkcipher_tfm(tfm));
940 }
941 
942 static inline unsigned int crypto_blkcipher_alignmask(
943         struct crypto_blkcipher *tfm)
944 {
945         return crypto_tfm_alg_alignmask(crypto_blkcipher_tfm(tfm));
946 }
947 
948 static inline u32 crypto_blkcipher_get_flags(struct crypto_blkcipher *tfm)
949 {
950         return crypto_tfm_get_flags(crypto_blkcipher_tfm(tfm));
951 }
952 
953 static inline void crypto_blkcipher_set_flags(struct crypto_blkcipher *tfm,
954                                               u32 flags)
955 {
956         crypto_tfm_set_flags(crypto_blkcipher_tfm(tfm), flags);
957 }
958 
959 static inline void crypto_blkcipher_clear_flags(struct crypto_blkcipher *tfm,
960                                                 u32 flags)
961 {
962         crypto_tfm_clear_flags(crypto_blkcipher_tfm(tfm), flags);
963 }
964 
965 static inline int crypto_blkcipher_setkey(struct crypto_blkcipher *tfm,
966                                           const u8 *key, unsigned int keylen)
967 {
968         return crypto_blkcipher_crt(tfm)->setkey(crypto_blkcipher_tfm(tfm),
969                                                  key, keylen);
970 }
971 
972 static inline int crypto_blkcipher_encrypt(struct blkcipher_desc *desc,
973                                            struct scatterlist *dst,
974                                            struct scatterlist *src,
975                                            unsigned int nbytes)
976 {
977         desc->info = crypto_blkcipher_crt(desc->tfm)->iv;
978         return crypto_blkcipher_crt(desc->tfm)->encrypt(desc, dst, src, nbytes);
979 }
980 
981 static inline int crypto_blkcipher_encrypt_iv(struct blkcipher_desc *desc,
982                                               struct scatterlist *dst,
983                                               struct scatterlist *src,
984                                               unsigned int nbytes)
985 {
986         return crypto_blkcipher_crt(desc->tfm)->encrypt(desc, dst, src, nbytes);
987 }
988 
989 static inline int crypto_blkcipher_decrypt(struct blkcipher_desc *desc,
990                                            struct scatterlist *dst,
991                                            struct scatterlist *src,
992                                            unsigned int nbytes)
993 {
994         desc->info = crypto_blkcipher_crt(desc->tfm)->iv;
995         return crypto_blkcipher_crt(desc->tfm)->decrypt(desc, dst, src, nbytes);
996 }
997 
998 static inline int crypto_blkcipher_decrypt_iv(struct blkcipher_desc *desc,
999                                               struct scatterlist *dst,
1000                                               struct scatterlist *src,
1001                                               unsigned int nbytes)
1002 {
1003         return crypto_blkcipher_crt(desc->tfm)->decrypt(desc, dst, src, nbytes);
1004 }
1005 
1006 static inline void crypto_blkcipher_set_iv(struct crypto_blkcipher *tfm,
1007                                            const u8 *src, unsigned int len)
1008 {
1009         memcpy(crypto_blkcipher_crt(tfm)->iv, src, len);
1010 }
1011 
1012 static inline void crypto_blkcipher_get_iv(struct crypto_blkcipher *tfm,
1013                                            u8 *dst, unsigned int len)
1014 {
1015         memcpy(dst, crypto_blkcipher_crt(tfm)->iv, len);
1016 }
1017 
1018 static inline struct crypto_cipher *__crypto_cipher_cast(struct crypto_tfm *tfm)
1019 {
1020         return (struct crypto_cipher *)tfm;
1021 }
1022 
1023 static inline struct crypto_cipher *crypto_cipher_cast(struct crypto_tfm *tfm)
1024 {
1025         BUG_ON(crypto_tfm_alg_type(tfm) != CRYPTO_ALG_TYPE_CIPHER);
1026         return __crypto_cipher_cast(tfm);
1027 }
1028 
1029 static inline struct crypto_cipher *crypto_alloc_cipher(const char *alg_name,
1030                                                         u32 type, u32 mask)
1031 {
1032         type &= ~CRYPTO_ALG_TYPE_MASK;
1033         type |= CRYPTO_ALG_TYPE_CIPHER;
1034         mask |= CRYPTO_ALG_TYPE_MASK;
1035 
1036         return __crypto_cipher_cast(crypto_alloc_base(alg_name, type, mask));
1037 }
1038 
1039 static inline struct crypto_tfm *crypto_cipher_tfm(struct crypto_cipher *tfm)
1040 {
1041         return &tfm->base;
1042 }
1043 
1044 static inline void crypto_free_cipher(struct crypto_cipher *tfm)
1045 {
1046         crypto_free_tfm(crypto_cipher_tfm(tfm));
1047 }
1048 
1049 static inline int crypto_has_cipher(const char *alg_name, u32 type, u32 mask)
1050 {
1051         type &= ~CRYPTO_ALG_TYPE_MASK;
1052         type |= CRYPTO_ALG_TYPE_CIPHER;
1053         mask |= CRYPTO_ALG_TYPE_MASK;
1054 
1055         return crypto_has_alg(alg_name, type, mask);
1056 }
1057 
1058 static inline struct cipher_tfm *crypto_cipher_crt(struct crypto_cipher *tfm)
1059 {
1060         return &crypto_cipher_tfm(tfm)->crt_cipher;
1061 }
1062 
1063 static inline unsigned int crypto_cipher_blocksize(struct crypto_cipher *tfm)
1064 {
1065         return crypto_tfm_alg_blocksize(crypto_cipher_tfm(tfm));
1066 }
1067 
1068 static inline unsigned int crypto_cipher_alignmask(struct crypto_cipher *tfm)
1069 {
1070         return crypto_tfm_alg_alignmask(crypto_cipher_tfm(tfm));
1071 }
1072 
1073 static inline u32 crypto_cipher_get_flags(struct crypto_cipher *tfm)
1074 {
1075         return crypto_tfm_get_flags(crypto_cipher_tfm(tfm));
1076 }
1077 
1078 static inline void crypto_cipher_set_flags(struct crypto_cipher *tfm,
1079                                            u32 flags)
1080 {
1081         crypto_tfm_set_flags(crypto_cipher_tfm(tfm), flags);
1082 }
1083 
1084 static inline void crypto_cipher_clear_flags(struct crypto_cipher *tfm,
1085                                              u32 flags)
1086 {
1087         crypto_tfm_clear_flags(crypto_cipher_tfm(tfm), flags);
1088 }
1089 
1090 static inline int crypto_cipher_setkey(struct crypto_cipher *tfm,
1091                                        const u8 *key, unsigned int keylen)
1092 {
1093         return crypto_cipher_crt(tfm)->cit_setkey(crypto_cipher_tfm(tfm),
1094                                                   key, keylen);
1095 }
1096 
1097 static inline void crypto_cipher_encrypt_one(struct crypto_cipher *tfm,
1098                                              u8 *dst, const u8 *src)
1099 {
1100         crypto_cipher_crt(tfm)->cit_encrypt_one(crypto_cipher_tfm(tfm),
1101                                                 dst, src);
1102 }
1103 
1104 static inline void crypto_cipher_decrypt_one(struct crypto_cipher *tfm,
1105                                              u8 *dst, const u8 *src)
1106 {
1107         crypto_cipher_crt(tfm)->cit_decrypt_one(crypto_cipher_tfm(tfm),
1108                                                 dst, src);
1109 }
1110 
1111 static inline struct crypto_hash *__crypto_hash_cast(struct crypto_tfm *tfm)
1112 {
1113         return (struct crypto_hash *)tfm;
1114 }
1115 
1116 static inline struct crypto_hash *crypto_hash_cast(struct crypto_tfm *tfm)
1117 {
1118         BUG_ON((crypto_tfm_alg_type(tfm) ^ CRYPTO_ALG_TYPE_HASH) &
1119                CRYPTO_ALG_TYPE_HASH_MASK);
1120         return __crypto_hash_cast(tfm);
1121 }
1122 
1123 static inline struct crypto_hash *crypto_alloc_hash(const char *alg_name,
1124                                                     u32 type, u32 mask)
1125 {
1126         type &= ~CRYPTO_ALG_TYPE_MASK;
1127         mask &= ~CRYPTO_ALG_TYPE_MASK;
1128         type |= CRYPTO_ALG_TYPE_HASH;
1129         mask |= CRYPTO_ALG_TYPE_HASH_MASK;
1130 
1131         return __crypto_hash_cast(crypto_alloc_base(alg_name, type, mask));
1132 }
1133 
1134 static inline struct crypto_tfm *crypto_hash_tfm(struct crypto_hash *tfm)
1135 {
1136         return &tfm->base;
1137 }
1138 
1139 static inline void crypto_free_hash(struct crypto_hash *tfm)
1140 {
1141         crypto_free_tfm(crypto_hash_tfm(tfm));
1142 }
1143 
1144 static inline int crypto_has_hash(const char *alg_name, u32 type, u32 mask)
1145 {
1146         type &= ~CRYPTO_ALG_TYPE_MASK;
1147         mask &= ~CRYPTO_ALG_TYPE_MASK;
1148         type |= CRYPTO_ALG_TYPE_HASH;
1149         mask |= CRYPTO_ALG_TYPE_HASH_MASK;
1150 
1151         return crypto_has_alg(alg_name, type, mask);
1152 }
1153 
1154 static inline struct hash_tfm *crypto_hash_crt(struct crypto_hash *tfm)
1155 {
1156         return &crypto_hash_tfm(tfm)->crt_hash;
1157 }
1158 
1159 static inline unsigned int crypto_hash_blocksize(struct crypto_hash *tfm)
1160 {
1161         return crypto_tfm_alg_blocksize(crypto_hash_tfm(tfm));
1162 }
1163 
1164 static inline unsigned int crypto_hash_alignmask(struct crypto_hash *tfm)
1165 {
1166         return crypto_tfm_alg_alignmask(crypto_hash_tfm(tfm));
1167 }
1168 
1169 static inline unsigned int crypto_hash_digestsize(struct crypto_hash *tfm)
1170 {
1171         return crypto_hash_crt(tfm)->digestsize;
1172 }
1173 
1174 static inline u32 crypto_hash_get_flags(struct crypto_hash *tfm)
1175 {
1176         return crypto_tfm_get_flags(crypto_hash_tfm(tfm));
1177 }
1178 
1179 static inline void crypto_hash_set_flags(struct crypto_hash *tfm, u32 flags)
1180 {
1181         crypto_tfm_set_flags(crypto_hash_tfm(tfm), flags);
1182 }
1183 
1184 static inline void crypto_hash_clear_flags(struct crypto_hash *tfm, u32 flags)
1185 {
1186         crypto_tfm_clear_flags(crypto_hash_tfm(tfm), flags);
1187 }
1188 
1189 static inline int crypto_hash_init(struct hash_desc *desc)
1190 {
1191         return crypto_hash_crt(desc->tfm)->init(desc);
1192 }
1193 
1194 static inline int crypto_hash_update(struct hash_desc *desc,
1195                                      struct scatterlist *sg,
1196                                      unsigned int nbytes)
1197 {
1198         return crypto_hash_crt(desc->tfm)->update(desc, sg, nbytes);
1199 }
1200 
1201 static inline int crypto_hash_final(struct hash_desc *desc, u8 *out)
1202 {
1203         return crypto_hash_crt(desc->tfm)->final(desc, out);
1204 }
1205 
1206 static inline int crypto_hash_digest(struct hash_desc *desc,
1207                                      struct scatterlist *sg,
1208                                      unsigned int nbytes, u8 *out)
1209 {
1210         return crypto_hash_crt(desc->tfm)->digest(desc, sg, nbytes, out);
1211 }
1212 
1213 static inline int crypto_hash_setkey(struct crypto_hash *hash,
1214                                      const u8 *key, unsigned int keylen)
1215 {
1216         return crypto_hash_crt(hash)->setkey(hash, key, keylen);
1217 }
1218 
1219 static inline struct crypto_comp *__crypto_comp_cast(struct crypto_tfm *tfm)
1220 {
1221         return (struct crypto_comp *)tfm;
1222 }
1223 
1224 static inline struct crypto_comp *crypto_comp_cast(struct crypto_tfm *tfm)
1225 {
1226         BUG_ON((crypto_tfm_alg_type(tfm) ^ CRYPTO_ALG_TYPE_COMPRESS) &
1227                CRYPTO_ALG_TYPE_MASK);
1228         return __crypto_comp_cast(tfm);
1229 }
1230 
1231 static inline struct crypto_comp *crypto_alloc_comp(const char *alg_name,
1232                                                     u32 type, u32 mask)
1233 {
1234         type &= ~CRYPTO_ALG_TYPE_MASK;
1235         type |= CRYPTO_ALG_TYPE_COMPRESS;
1236         mask |= CRYPTO_ALG_TYPE_MASK;
1237 
1238         return __crypto_comp_cast(crypto_alloc_base(alg_name, type, mask));
1239 }
1240 
1241 static inline struct crypto_tfm *crypto_comp_tfm(struct crypto_comp *tfm)
1242 {
1243         return &tfm->base;
1244 }
1245 
1246 static inline void crypto_free_comp(struct crypto_comp *tfm)
1247 {
1248         crypto_free_tfm(crypto_comp_tfm(tfm));
1249 }
1250 
1251 static inline int crypto_has_comp(const char *alg_name, u32 type, u32 mask)
1252 {
1253         type &= ~CRYPTO_ALG_TYPE_MASK;
1254         type |= CRYPTO_ALG_TYPE_COMPRESS;
1255         mask |= CRYPTO_ALG_TYPE_MASK;
1256 
1257         return crypto_has_alg(alg_name, type, mask);
1258 }
1259 
1260 static inline const char *crypto_comp_name(struct crypto_comp *tfm)
1261 {
1262         return crypto_tfm_alg_name(crypto_comp_tfm(tfm));
1263 }
1264 
1265 static inline struct compress_tfm *crypto_comp_crt(struct crypto_comp *tfm)
1266 {
1267         return &crypto_comp_tfm(tfm)->crt_compress;
1268 }
1269 
1270 static inline int crypto_comp_compress(struct crypto_comp *tfm,
1271                                        const u8 *src, unsigned int slen,
1272                                        u8 *dst, unsigned int *dlen)
1273 {
1274         return crypto_comp_crt(tfm)->cot_compress(crypto_comp_tfm(tfm),
1275                                                   src, slen, dst, dlen);
1276 }
1277 
1278 static inline int crypto_comp_decompress(struct crypto_comp *tfm,
1279                                          const u8 *src, unsigned int slen,
1280                                          u8 *dst, unsigned int *dlen)
1281 {
1282         return crypto_comp_crt(tfm)->cot_decompress(crypto_comp_tfm(tfm),
1283                                                     src, slen, dst, dlen);
1284 }
1285 
1286 #endif  /* _LINUX_CRYPTO_H */
1287 
1288 

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