[CRYPTO] api: Remove one too many semicolon
[linux-3.10.git] / 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 <asm/atomic.h>
21 #include <linux/module.h>
22 #include <linux/kernel.h>
23 #include <linux/list.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_DIGEST          0x00000002
34 #define CRYPTO_ALG_TYPE_HASH            0x00000003
35 #define CRYPTO_ALG_TYPE_BLKCIPHER       0x00000004
36 #define CRYPTO_ALG_TYPE_COMPRESS        0x00000005
37
38 #define CRYPTO_ALG_TYPE_HASH_MASK       0x0000000e
39
40 #define CRYPTO_ALG_LARVAL               0x00000010
41 #define CRYPTO_ALG_DEAD                 0x00000020
42 #define CRYPTO_ALG_DYING                0x00000040
43 #define CRYPTO_ALG_ASYNC                0x00000080
44
45 /*
46  * Set this bit if and only if the algorithm requires another algorithm of
47  * the same type to handle corner cases.
48  */
49 #define CRYPTO_ALG_NEED_FALLBACK        0x00000100
50
51 /*
52  * Transform masks and values (for crt_flags).
53  */
54 #define CRYPTO_TFM_MODE_MASK            0x000000ff
55 #define CRYPTO_TFM_REQ_MASK             0x000fff00
56 #define CRYPTO_TFM_RES_MASK             0xfff00000
57
58 #define CRYPTO_TFM_MODE_ECB             0x00000001
59 #define CRYPTO_TFM_MODE_CBC             0x00000002
60 #define CRYPTO_TFM_MODE_CFB             0x00000004
61 #define CRYPTO_TFM_MODE_CTR             0x00000008
62
63 #define CRYPTO_TFM_REQ_WEAK_KEY         0x00000100
64 #define CRYPTO_TFM_REQ_MAY_SLEEP        0x00000200
65 #define CRYPTO_TFM_RES_WEAK_KEY         0x00100000
66 #define CRYPTO_TFM_RES_BAD_KEY_LEN      0x00200000
67 #define CRYPTO_TFM_RES_BAD_KEY_SCHED    0x00400000
68 #define CRYPTO_TFM_RES_BAD_BLOCK_LEN    0x00800000
69 #define CRYPTO_TFM_RES_BAD_FLAGS        0x01000000
70
71 /*
72  * Miscellaneous stuff.
73  */
74 #define CRYPTO_UNSPEC                   0
75 #define CRYPTO_MAX_ALG_NAME             64
76
77 #define CRYPTO_DIR_ENCRYPT              1
78 #define CRYPTO_DIR_DECRYPT              0
79
80 /*
81  * The macro CRYPTO_MINALIGN_ATTR (along with the void * type in the actual
82  * declaration) is used to ensure that the crypto_tfm context structure is
83  * aligned correctly for the given architecture so that there are no alignment
84  * faults for C data types.  In particular, this is required on platforms such
85  * as arm where pointers are 32-bit aligned but there are data types such as
86  * u64 which require 64-bit alignment.
87  */
88 #if defined(ARCH_KMALLOC_MINALIGN)
89 #define CRYPTO_MINALIGN ARCH_KMALLOC_MINALIGN
90 #elif defined(ARCH_SLAB_MINALIGN)
91 #define CRYPTO_MINALIGN ARCH_SLAB_MINALIGN
92 #endif
93
94 #ifdef CRYPTO_MINALIGN
95 #define CRYPTO_MINALIGN_ATTR __attribute__ ((__aligned__(CRYPTO_MINALIGN)))
96 #else
97 #define CRYPTO_MINALIGN_ATTR
98 #endif
99
100 struct scatterlist;
101 struct crypto_blkcipher;
102 struct crypto_hash;
103 struct crypto_tfm;
104 struct crypto_type;
105
106 struct blkcipher_desc {
107         struct crypto_blkcipher *tfm;
108         void *info;
109         u32 flags;
110 };
111
112 struct cipher_desc {
113         struct crypto_tfm *tfm;
114         void (*crfn)(struct crypto_tfm *tfm, u8 *dst, const u8 *src);
115         unsigned int (*prfn)(const struct cipher_desc *desc, u8 *dst,
116                              const u8 *src, unsigned int nbytes);
117         void *info;
118 };
119
120 struct hash_desc {
121         struct crypto_hash *tfm;
122         u32 flags;
123 };
124
125 /*
126  * Algorithms: modular crypto algorithm implementations, managed
127  * via crypto_register_alg() and crypto_unregister_alg().
128  */
129 struct blkcipher_alg {
130         int (*setkey)(struct crypto_tfm *tfm, const u8 *key,
131                       unsigned int keylen);
132         int (*encrypt)(struct blkcipher_desc *desc,
133                        struct scatterlist *dst, struct scatterlist *src,
134                        unsigned int nbytes);
135         int (*decrypt)(struct blkcipher_desc *desc,
136                        struct scatterlist *dst, struct scatterlist *src,
137                        unsigned int nbytes);
138
139         unsigned int min_keysize;
140         unsigned int max_keysize;
141         unsigned int ivsize;
142 };
143
144 struct cipher_alg {
145         unsigned int cia_min_keysize;
146         unsigned int cia_max_keysize;
147         int (*cia_setkey)(struct crypto_tfm *tfm, const u8 *key,
148                           unsigned int keylen);
149         void (*cia_encrypt)(struct crypto_tfm *tfm, u8 *dst, const u8 *src);
150         void (*cia_decrypt)(struct crypto_tfm *tfm, u8 *dst, const u8 *src);
151
152         unsigned int (*cia_encrypt_ecb)(const struct cipher_desc *desc,
153                                         u8 *dst, const u8 *src,
154                                         unsigned int nbytes) __deprecated;
155         unsigned int (*cia_decrypt_ecb)(const struct cipher_desc *desc,
156                                         u8 *dst, const u8 *src,
157                                         unsigned int nbytes) __deprecated;
158         unsigned int (*cia_encrypt_cbc)(const struct cipher_desc *desc,
159                                         u8 *dst, const u8 *src,
160                                         unsigned int nbytes) __deprecated;
161         unsigned int (*cia_decrypt_cbc)(const struct cipher_desc *desc,
162                                         u8 *dst, const u8 *src,
163                                         unsigned int nbytes) __deprecated;
164 };
165
166 struct digest_alg {
167         unsigned int dia_digestsize;
168         void (*dia_init)(struct crypto_tfm *tfm);
169         void (*dia_update)(struct crypto_tfm *tfm, const u8 *data,
170                            unsigned int len);
171         void (*dia_final)(struct crypto_tfm *tfm, u8 *out);
172         int (*dia_setkey)(struct crypto_tfm *tfm, const u8 *key,
173                           unsigned int keylen);
174 };
175
176 struct hash_alg {
177         int (*init)(struct hash_desc *desc);
178         int (*update)(struct hash_desc *desc, struct scatterlist *sg,
179                       unsigned int nbytes);
180         int (*final)(struct hash_desc *desc, u8 *out);
181         int (*digest)(struct hash_desc *desc, struct scatterlist *sg,
182                       unsigned int nbytes, u8 *out);
183         int (*setkey)(struct crypto_hash *tfm, const u8 *key,
184                       unsigned int keylen);
185
186         unsigned int digestsize;
187 };
188
189 struct compress_alg {
190         int (*coa_compress)(struct crypto_tfm *tfm, const u8 *src,
191                             unsigned int slen, u8 *dst, unsigned int *dlen);
192         int (*coa_decompress)(struct crypto_tfm *tfm, const u8 *src,
193                               unsigned int slen, u8 *dst, unsigned int *dlen);
194 };
195
196 #define cra_blkcipher   cra_u.blkcipher
197 #define cra_cipher      cra_u.cipher
198 #define cra_digest      cra_u.digest
199 #define cra_hash        cra_u.hash
200 #define cra_compress    cra_u.compress
201
202 struct crypto_alg {
203         struct list_head cra_list;
204         struct list_head cra_users;
205
206         u32 cra_flags;
207         unsigned int cra_blocksize;
208         unsigned int cra_ctxsize;
209         unsigned int cra_alignmask;
210
211         int cra_priority;
212         atomic_t cra_refcnt;
213
214         char cra_name[CRYPTO_MAX_ALG_NAME];
215         char cra_driver_name[CRYPTO_MAX_ALG_NAME];
216
217         const struct crypto_type *cra_type;
218
219         union {
220                 struct blkcipher_alg blkcipher;
221                 struct cipher_alg cipher;
222                 struct digest_alg digest;
223                 struct hash_alg hash;
224                 struct compress_alg compress;
225         } cra_u;
226
227         int (*cra_init)(struct crypto_tfm *tfm);
228         void (*cra_exit)(struct crypto_tfm *tfm);
229         void (*cra_destroy)(struct crypto_alg *alg);
230         
231         struct module *cra_module;
232 };
233
234 /*
235  * Algorithm registration interface.
236  */
237 int crypto_register_alg(struct crypto_alg *alg);
238 int crypto_unregister_alg(struct crypto_alg *alg);
239
240 /*
241  * Algorithm query interface.
242  */
243 #ifdef CONFIG_CRYPTO
244 int crypto_alg_available(const char *name, u32 flags)
245         __deprecated_for_modules;
246 int crypto_has_alg(const char *name, u32 type, u32 mask);
247 #else
248 static int crypto_alg_available(const char *name, u32 flags)
249         __deprecated_for_modules;
250 static inline int crypto_alg_available(const char *name, u32 flags)
251 {
252         return 0;
253 }
254
255 static inline int crypto_has_alg(const char *name, u32 type, u32 mask)
256 {
257         return 0;
258 }
259 #endif
260
261 /*
262  * Transforms: user-instantiated objects which encapsulate algorithms
263  * and core processing logic.  Managed via crypto_alloc_*() and
264  * crypto_free_*(), as well as the various helpers below.
265  */
266
267 struct blkcipher_tfm {
268         void *iv;
269         int (*setkey)(struct crypto_tfm *tfm, const u8 *key,
270                       unsigned int keylen);
271         int (*encrypt)(struct blkcipher_desc *desc, struct scatterlist *dst,
272                        struct scatterlist *src, unsigned int nbytes);
273         int (*decrypt)(struct blkcipher_desc *desc, struct scatterlist *dst,
274                        struct scatterlist *src, unsigned int nbytes);
275 };
276
277 struct cipher_tfm {
278         void *cit_iv;
279         unsigned int cit_ivsize;
280         u32 cit_mode;
281         int (*cit_setkey)(struct crypto_tfm *tfm,
282                           const u8 *key, unsigned int keylen);
283         int (*cit_encrypt)(struct crypto_tfm *tfm,
284                            struct scatterlist *dst,
285                            struct scatterlist *src,
286                            unsigned int nbytes);
287         int (*cit_encrypt_iv)(struct crypto_tfm *tfm,
288                               struct scatterlist *dst,
289                               struct scatterlist *src,
290                               unsigned int nbytes, u8 *iv);
291         int (*cit_decrypt)(struct crypto_tfm *tfm,
292                            struct scatterlist *dst,
293                            struct scatterlist *src,
294                            unsigned int nbytes);
295         int (*cit_decrypt_iv)(struct crypto_tfm *tfm,
296                            struct scatterlist *dst,
297                            struct scatterlist *src,
298                            unsigned int nbytes, u8 *iv);
299         void (*cit_xor_block)(u8 *dst, const u8 *src);
300         void (*cit_encrypt_one)(struct crypto_tfm *tfm, u8 *dst, const u8 *src);
301         void (*cit_decrypt_one)(struct crypto_tfm *tfm, u8 *dst, const u8 *src);
302 };
303
304 struct hash_tfm {
305         int (*init)(struct hash_desc *desc);
306         int (*update)(struct hash_desc *desc,
307                       struct scatterlist *sg, unsigned int nsg);
308         int (*final)(struct hash_desc *desc, u8 *out);
309         int (*digest)(struct hash_desc *desc, struct scatterlist *sg,
310                       unsigned int nsg, u8 *out);
311         int (*setkey)(struct crypto_hash *tfm, const u8 *key,
312                       unsigned int keylen);
313         unsigned int digestsize;
314 };
315
316 struct compress_tfm {
317         int (*cot_compress)(struct crypto_tfm *tfm,
318                             const u8 *src, unsigned int slen,
319                             u8 *dst, unsigned int *dlen);
320         int (*cot_decompress)(struct crypto_tfm *tfm,
321                               const u8 *src, unsigned int slen,
322                               u8 *dst, unsigned int *dlen);
323 };
324
325 #define crt_blkcipher   crt_u.blkcipher
326 #define crt_cipher      crt_u.cipher
327 #define crt_hash        crt_u.hash
328 #define crt_compress    crt_u.compress
329
330 struct crypto_tfm {
331
332         u32 crt_flags;
333         
334         union {
335                 struct blkcipher_tfm blkcipher;
336                 struct cipher_tfm cipher;
337                 struct hash_tfm hash;
338                 struct compress_tfm compress;
339         } crt_u;
340         
341         struct crypto_alg *__crt_alg;
342
343         void *__crt_ctx[] CRYPTO_MINALIGN_ATTR;
344 };
345
346 #define crypto_cipher crypto_tfm
347 #define crypto_comp crypto_tfm
348
349 struct crypto_blkcipher {
350         struct crypto_tfm base;
351 };
352
353 struct crypto_hash {
354         struct crypto_tfm base;
355 };
356
357 enum {
358         CRYPTOA_UNSPEC,
359         CRYPTOA_ALG,
360 };
361
362 struct crypto_attr_alg {
363         char name[CRYPTO_MAX_ALG_NAME];
364 };
365
366 /* 
367  * Transform user interface.
368  */
369  
370 struct crypto_tfm *crypto_alloc_tfm(const char *alg_name, u32 tfm_flags);
371 struct crypto_tfm *crypto_alloc_base(const char *alg_name, u32 type, u32 mask);
372 void crypto_free_tfm(struct crypto_tfm *tfm);
373
374 /*
375  * Transform helpers which query the underlying algorithm.
376  */
377 static inline const char *crypto_tfm_alg_name(struct crypto_tfm *tfm)
378 {
379         return tfm->__crt_alg->cra_name;
380 }
381
382 static inline const char *crypto_tfm_alg_driver_name(struct crypto_tfm *tfm)
383 {
384         return tfm->__crt_alg->cra_driver_name;
385 }
386
387 static inline int crypto_tfm_alg_priority(struct crypto_tfm *tfm)
388 {
389         return tfm->__crt_alg->cra_priority;
390 }
391
392 static inline const char *crypto_tfm_alg_modname(struct crypto_tfm *tfm)
393 {
394         return module_name(tfm->__crt_alg->cra_module);
395 }
396
397 static inline u32 crypto_tfm_alg_type(struct crypto_tfm *tfm)
398 {
399         return tfm->__crt_alg->cra_flags & CRYPTO_ALG_TYPE_MASK;
400 }
401
402 static unsigned int crypto_tfm_alg_min_keysize(struct crypto_tfm *tfm)
403         __deprecated;
404 static inline unsigned int crypto_tfm_alg_min_keysize(struct crypto_tfm *tfm)
405 {
406         BUG_ON(crypto_tfm_alg_type(tfm) != CRYPTO_ALG_TYPE_CIPHER);
407         return tfm->__crt_alg->cra_cipher.cia_min_keysize;
408 }
409
410 static unsigned int crypto_tfm_alg_max_keysize(struct crypto_tfm *tfm)
411         __deprecated;
412 static inline unsigned int crypto_tfm_alg_max_keysize(struct crypto_tfm *tfm)
413 {
414         BUG_ON(crypto_tfm_alg_type(tfm) != CRYPTO_ALG_TYPE_CIPHER);
415         return tfm->__crt_alg->cra_cipher.cia_max_keysize;
416 }
417
418 static unsigned int crypto_tfm_alg_ivsize(struct crypto_tfm *tfm) __deprecated;
419 static inline unsigned int crypto_tfm_alg_ivsize(struct crypto_tfm *tfm)
420 {
421         BUG_ON(crypto_tfm_alg_type(tfm) != CRYPTO_ALG_TYPE_CIPHER);
422         return tfm->crt_cipher.cit_ivsize;
423 }
424
425 static inline unsigned int crypto_tfm_alg_blocksize(struct crypto_tfm *tfm)
426 {
427         return tfm->__crt_alg->cra_blocksize;
428 }
429
430 static inline unsigned int crypto_tfm_alg_digestsize(struct crypto_tfm *tfm)
431 {
432         BUG_ON(crypto_tfm_alg_type(tfm) != CRYPTO_ALG_TYPE_DIGEST);
433         return tfm->__crt_alg->cra_digest.dia_digestsize;
434 }
435
436 static inline unsigned int crypto_tfm_alg_alignmask(struct crypto_tfm *tfm)
437 {
438         return tfm->__crt_alg->cra_alignmask;
439 }
440
441 static inline u32 crypto_tfm_get_flags(struct crypto_tfm *tfm)
442 {
443         return tfm->crt_flags;
444 }
445
446 static inline void crypto_tfm_set_flags(struct crypto_tfm *tfm, u32 flags)
447 {
448         tfm->crt_flags |= flags;
449 }
450
451 static inline void crypto_tfm_clear_flags(struct crypto_tfm *tfm, u32 flags)
452 {
453         tfm->crt_flags &= ~flags;
454 }
455
456 static inline void *crypto_tfm_ctx(struct crypto_tfm *tfm)
457 {
458         return tfm->__crt_ctx;
459 }
460
461 static inline unsigned int crypto_tfm_ctx_alignment(void)
462 {
463         struct crypto_tfm *tfm;
464         return __alignof__(tfm->__crt_ctx);
465 }
466
467 /*
468  * API wrappers.
469  */
470 static inline struct crypto_blkcipher *__crypto_blkcipher_cast(
471         struct crypto_tfm *tfm)
472 {
473         return (struct crypto_blkcipher *)tfm;
474 }
475
476 static inline struct crypto_blkcipher *crypto_blkcipher_cast(
477         struct crypto_tfm *tfm)
478 {
479         BUG_ON(crypto_tfm_alg_type(tfm) != CRYPTO_ALG_TYPE_BLKCIPHER);
480         return __crypto_blkcipher_cast(tfm);
481 }
482
483 static inline struct crypto_blkcipher *crypto_alloc_blkcipher(
484         const char *alg_name, u32 type, u32 mask)
485 {
486         type &= ~CRYPTO_ALG_TYPE_MASK;
487         type |= CRYPTO_ALG_TYPE_BLKCIPHER;
488         mask |= CRYPTO_ALG_TYPE_MASK;
489
490         return __crypto_blkcipher_cast(crypto_alloc_base(alg_name, type, mask));
491 }
492
493 static inline struct crypto_tfm *crypto_blkcipher_tfm(
494         struct crypto_blkcipher *tfm)
495 {
496         return &tfm->base;
497 }
498
499 static inline void crypto_free_blkcipher(struct crypto_blkcipher *tfm)
500 {
501         crypto_free_tfm(crypto_blkcipher_tfm(tfm));
502 }
503
504 static inline int crypto_has_blkcipher(const char *alg_name, u32 type, u32 mask)
505 {
506         type &= ~CRYPTO_ALG_TYPE_MASK;
507         type |= CRYPTO_ALG_TYPE_BLKCIPHER;
508         mask |= CRYPTO_ALG_TYPE_MASK;
509
510         return crypto_has_alg(alg_name, type, mask);
511 }
512
513 static inline const char *crypto_blkcipher_name(struct crypto_blkcipher *tfm)
514 {
515         return crypto_tfm_alg_name(crypto_blkcipher_tfm(tfm));
516 }
517
518 static inline struct blkcipher_tfm *crypto_blkcipher_crt(
519         struct crypto_blkcipher *tfm)
520 {
521         return &crypto_blkcipher_tfm(tfm)->crt_blkcipher;
522 }
523
524 static inline struct blkcipher_alg *crypto_blkcipher_alg(
525         struct crypto_blkcipher *tfm)
526 {
527         return &crypto_blkcipher_tfm(tfm)->__crt_alg->cra_blkcipher;
528 }
529
530 static inline unsigned int crypto_blkcipher_ivsize(struct crypto_blkcipher *tfm)
531 {
532         return crypto_blkcipher_alg(tfm)->ivsize;
533 }
534
535 static inline unsigned int crypto_blkcipher_blocksize(
536         struct crypto_blkcipher *tfm)
537 {
538         return crypto_tfm_alg_blocksize(crypto_blkcipher_tfm(tfm));
539 }
540
541 static inline unsigned int crypto_blkcipher_alignmask(
542         struct crypto_blkcipher *tfm)
543 {
544         return crypto_tfm_alg_alignmask(crypto_blkcipher_tfm(tfm));
545 }
546
547 static inline u32 crypto_blkcipher_get_flags(struct crypto_blkcipher *tfm)
548 {
549         return crypto_tfm_get_flags(crypto_blkcipher_tfm(tfm));
550 }
551
552 static inline void crypto_blkcipher_set_flags(struct crypto_blkcipher *tfm,
553                                               u32 flags)
554 {
555         crypto_tfm_set_flags(crypto_blkcipher_tfm(tfm), flags);
556 }
557
558 static inline void crypto_blkcipher_clear_flags(struct crypto_blkcipher *tfm,
559                                                 u32 flags)
560 {
561         crypto_tfm_clear_flags(crypto_blkcipher_tfm(tfm), flags);
562 }
563
564 static inline int crypto_blkcipher_setkey(struct crypto_blkcipher *tfm,
565                                           const u8 *key, unsigned int keylen)
566 {
567         return crypto_blkcipher_crt(tfm)->setkey(crypto_blkcipher_tfm(tfm),
568                                                  key, keylen);
569 }
570
571 static inline int crypto_blkcipher_encrypt(struct blkcipher_desc *desc,
572                                            struct scatterlist *dst,
573                                            struct scatterlist *src,
574                                            unsigned int nbytes)
575 {
576         desc->info = crypto_blkcipher_crt(desc->tfm)->iv;
577         return crypto_blkcipher_crt(desc->tfm)->encrypt(desc, dst, src, nbytes);
578 }
579
580 static inline int crypto_blkcipher_encrypt_iv(struct blkcipher_desc *desc,
581                                               struct scatterlist *dst,
582                                               struct scatterlist *src,
583                                               unsigned int nbytes)
584 {
585         return crypto_blkcipher_crt(desc->tfm)->encrypt(desc, dst, src, nbytes);
586 }
587
588 static inline int crypto_blkcipher_decrypt(struct blkcipher_desc *desc,
589                                            struct scatterlist *dst,
590                                            struct scatterlist *src,
591                                            unsigned int nbytes)
592 {
593         desc->info = crypto_blkcipher_crt(desc->tfm)->iv;
594         return crypto_blkcipher_crt(desc->tfm)->decrypt(desc, dst, src, nbytes);
595 }
596
597 static inline int crypto_blkcipher_decrypt_iv(struct blkcipher_desc *desc,
598                                               struct scatterlist *dst,
599                                               struct scatterlist *src,
600                                               unsigned int nbytes)
601 {
602         return crypto_blkcipher_crt(desc->tfm)->decrypt(desc, dst, src, nbytes);
603 }
604
605 static inline void crypto_blkcipher_set_iv(struct crypto_blkcipher *tfm,
606                                            const u8 *src, unsigned int len)
607 {
608         memcpy(crypto_blkcipher_crt(tfm)->iv, src, len);
609 }
610
611 static inline void crypto_blkcipher_get_iv(struct crypto_blkcipher *tfm,
612                                            u8 *dst, unsigned int len)
613 {
614         memcpy(dst, crypto_blkcipher_crt(tfm)->iv, len);
615 }
616
617 static inline struct crypto_cipher *__crypto_cipher_cast(struct crypto_tfm *tfm)
618 {
619         return (struct crypto_cipher *)tfm;
620 }
621
622 static inline struct crypto_cipher *crypto_cipher_cast(struct crypto_tfm *tfm)
623 {
624         BUG_ON(crypto_tfm_alg_type(tfm) != CRYPTO_ALG_TYPE_CIPHER);
625         return __crypto_cipher_cast(tfm);
626 }
627
628 static inline struct crypto_cipher *crypto_alloc_cipher(const char *alg_name,
629                                                         u32 type, u32 mask)
630 {
631         type &= ~CRYPTO_ALG_TYPE_MASK;
632         type |= CRYPTO_ALG_TYPE_CIPHER;
633         mask |= CRYPTO_ALG_TYPE_MASK;
634
635         return __crypto_cipher_cast(crypto_alloc_base(alg_name, type, mask));
636 }
637
638 static inline struct crypto_tfm *crypto_cipher_tfm(struct crypto_cipher *tfm)
639 {
640         return tfm;
641 }
642
643 static inline void crypto_free_cipher(struct crypto_cipher *tfm)
644 {
645         crypto_free_tfm(crypto_cipher_tfm(tfm));
646 }
647
648 static inline int crypto_has_cipher(const char *alg_name, u32 type, u32 mask)
649 {
650         type &= ~CRYPTO_ALG_TYPE_MASK;
651         type |= CRYPTO_ALG_TYPE_CIPHER;
652         mask |= CRYPTO_ALG_TYPE_MASK;
653
654         return crypto_has_alg(alg_name, type, mask);
655 }
656
657 static inline struct cipher_tfm *crypto_cipher_crt(struct crypto_cipher *tfm)
658 {
659         return &crypto_cipher_tfm(tfm)->crt_cipher;
660 }
661
662 static inline unsigned int crypto_cipher_blocksize(struct crypto_cipher *tfm)
663 {
664         return crypto_tfm_alg_blocksize(crypto_cipher_tfm(tfm));
665 }
666
667 static inline unsigned int crypto_cipher_alignmask(struct crypto_cipher *tfm)
668 {
669         return crypto_tfm_alg_alignmask(crypto_cipher_tfm(tfm));
670 }
671
672 static inline u32 crypto_cipher_get_flags(struct crypto_cipher *tfm)
673 {
674         return crypto_tfm_get_flags(crypto_cipher_tfm(tfm));
675 }
676
677 static inline void crypto_cipher_set_flags(struct crypto_cipher *tfm,
678                                            u32 flags)
679 {
680         crypto_tfm_set_flags(crypto_cipher_tfm(tfm), flags);
681 }
682
683 static inline void crypto_cipher_clear_flags(struct crypto_cipher *tfm,
684                                              u32 flags)
685 {
686         crypto_tfm_clear_flags(crypto_cipher_tfm(tfm), flags);
687 }
688
689 static inline int crypto_cipher_setkey(struct crypto_cipher *tfm,
690                                        const u8 *key, unsigned int keylen)
691 {
692         return crypto_cipher_crt(tfm)->cit_setkey(crypto_cipher_tfm(tfm),
693                                                   key, keylen);
694 }
695
696 static inline void crypto_cipher_encrypt_one(struct crypto_cipher *tfm,
697                                              u8 *dst, const u8 *src)
698 {
699         crypto_cipher_crt(tfm)->cit_encrypt_one(crypto_cipher_tfm(tfm),
700                                                 dst, src);
701 }
702
703 static inline void crypto_cipher_decrypt_one(struct crypto_cipher *tfm,
704                                              u8 *dst, const u8 *src)
705 {
706         crypto_cipher_crt(tfm)->cit_decrypt_one(crypto_cipher_tfm(tfm),
707                                                 dst, src);
708 }
709
710 void crypto_digest_init(struct crypto_tfm *tfm) __deprecated_for_modules;
711 void crypto_digest_update(struct crypto_tfm *tfm,
712                           struct scatterlist *sg, unsigned int nsg)
713         __deprecated_for_modules;
714 void crypto_digest_final(struct crypto_tfm *tfm, u8 *out)
715         __deprecated_for_modules;
716 void crypto_digest_digest(struct crypto_tfm *tfm,
717                           struct scatterlist *sg, unsigned int nsg, u8 *out)
718         __deprecated_for_modules;
719
720 static inline struct crypto_hash *__crypto_hash_cast(struct crypto_tfm *tfm)
721 {
722         return (struct crypto_hash *)tfm;
723 }
724
725 static inline struct crypto_hash *crypto_hash_cast(struct crypto_tfm *tfm)
726 {
727         BUG_ON((crypto_tfm_alg_type(tfm) ^ CRYPTO_ALG_TYPE_HASH) &
728                CRYPTO_ALG_TYPE_HASH_MASK);
729         return __crypto_hash_cast(tfm);
730 }
731
732 static int crypto_digest_setkey(struct crypto_tfm *tfm, const u8 *key,
733                                 unsigned int keylen) __deprecated;
734 static inline int crypto_digest_setkey(struct crypto_tfm *tfm,
735                                        const u8 *key, unsigned int keylen)
736 {
737         return tfm->crt_hash.setkey(crypto_hash_cast(tfm), key, keylen);
738 }
739
740 static inline struct crypto_hash *crypto_alloc_hash(const char *alg_name,
741                                                     u32 type, u32 mask)
742 {
743         type &= ~CRYPTO_ALG_TYPE_MASK;
744         type |= CRYPTO_ALG_TYPE_HASH;
745         mask |= CRYPTO_ALG_TYPE_HASH_MASK;
746
747         return __crypto_hash_cast(crypto_alloc_base(alg_name, type, mask));
748 }
749
750 static inline struct crypto_tfm *crypto_hash_tfm(struct crypto_hash *tfm)
751 {
752         return &tfm->base;
753 }
754
755 static inline void crypto_free_hash(struct crypto_hash *tfm)
756 {
757         crypto_free_tfm(crypto_hash_tfm(tfm));
758 }
759
760 static inline int crypto_has_hash(const char *alg_name, u32 type, u32 mask)
761 {
762         type &= ~CRYPTO_ALG_TYPE_MASK;
763         type |= CRYPTO_ALG_TYPE_HASH;
764         mask |= CRYPTO_ALG_TYPE_HASH_MASK;
765
766         return crypto_has_alg(alg_name, type, mask);
767 }
768
769 static inline struct hash_tfm *crypto_hash_crt(struct crypto_hash *tfm)
770 {
771         return &crypto_hash_tfm(tfm)->crt_hash;
772 }
773
774 static inline unsigned int crypto_hash_blocksize(struct crypto_hash *tfm)
775 {
776         return crypto_tfm_alg_blocksize(crypto_hash_tfm(tfm));
777 }
778
779 static inline unsigned int crypto_hash_alignmask(struct crypto_hash *tfm)
780 {
781         return crypto_tfm_alg_alignmask(crypto_hash_tfm(tfm));
782 }
783
784 static inline unsigned int crypto_hash_digestsize(struct crypto_hash *tfm)
785 {
786         return crypto_hash_crt(tfm)->digestsize;
787 }
788
789 static inline u32 crypto_hash_get_flags(struct crypto_hash *tfm)
790 {
791         return crypto_tfm_get_flags(crypto_hash_tfm(tfm));
792 }
793
794 static inline void crypto_hash_set_flags(struct crypto_hash *tfm, u32 flags)
795 {
796         crypto_tfm_set_flags(crypto_hash_tfm(tfm), flags);
797 }
798
799 static inline void crypto_hash_clear_flags(struct crypto_hash *tfm, u32 flags)
800 {
801         crypto_tfm_clear_flags(crypto_hash_tfm(tfm), flags);
802 }
803
804 static inline int crypto_hash_init(struct hash_desc *desc)
805 {
806         return crypto_hash_crt(desc->tfm)->init(desc);
807 }
808
809 static inline int crypto_hash_update(struct hash_desc *desc,
810                                      struct scatterlist *sg,
811                                      unsigned int nbytes)
812 {
813         return crypto_hash_crt(desc->tfm)->update(desc, sg, nbytes);
814 }
815
816 static inline int crypto_hash_final(struct hash_desc *desc, u8 *out)
817 {
818         return crypto_hash_crt(desc->tfm)->final(desc, out);
819 }
820
821 static inline int crypto_hash_digest(struct hash_desc *desc,
822                                      struct scatterlist *sg,
823                                      unsigned int nbytes, u8 *out)
824 {
825         return crypto_hash_crt(desc->tfm)->digest(desc, sg, nbytes, out);
826 }
827
828 static inline int crypto_hash_setkey(struct crypto_hash *hash,
829                                      const u8 *key, unsigned int keylen)
830 {
831         return crypto_hash_crt(hash)->setkey(hash, key, keylen);
832 }
833
834 static int crypto_cipher_encrypt(struct crypto_tfm *tfm,
835                                  struct scatterlist *dst,
836                                  struct scatterlist *src,
837                                  unsigned int nbytes) __deprecated;
838 static inline int crypto_cipher_encrypt(struct crypto_tfm *tfm,
839                                         struct scatterlist *dst,
840                                         struct scatterlist *src,
841                                         unsigned int nbytes)
842 {
843         BUG_ON(crypto_tfm_alg_type(tfm) != CRYPTO_ALG_TYPE_CIPHER);
844         return tfm->crt_cipher.cit_encrypt(tfm, dst, src, nbytes);
845 }                                        
846
847 static int crypto_cipher_encrypt_iv(struct crypto_tfm *tfm,
848                                     struct scatterlist *dst,
849                                     struct scatterlist *src,
850                                     unsigned int nbytes, u8 *iv) __deprecated;
851 static inline int crypto_cipher_encrypt_iv(struct crypto_tfm *tfm,
852                                            struct scatterlist *dst,
853                                            struct scatterlist *src,
854                                            unsigned int nbytes, u8 *iv)
855 {
856         BUG_ON(crypto_tfm_alg_type(tfm) != CRYPTO_ALG_TYPE_CIPHER);
857         return tfm->crt_cipher.cit_encrypt_iv(tfm, dst, src, nbytes, iv);
858 }                                        
859
860 static int crypto_cipher_decrypt(struct crypto_tfm *tfm,
861                                  struct scatterlist *dst,
862                                  struct scatterlist *src,
863                                  unsigned int nbytes) __deprecated;
864 static inline int crypto_cipher_decrypt(struct crypto_tfm *tfm,
865                                         struct scatterlist *dst,
866                                         struct scatterlist *src,
867                                         unsigned int nbytes)
868 {
869         BUG_ON(crypto_tfm_alg_type(tfm) != CRYPTO_ALG_TYPE_CIPHER);
870         return tfm->crt_cipher.cit_decrypt(tfm, dst, src, nbytes);
871 }
872
873 static int crypto_cipher_decrypt_iv(struct crypto_tfm *tfm,
874                                     struct scatterlist *dst,
875                                     struct scatterlist *src,
876                                     unsigned int nbytes, u8 *iv) __deprecated;
877 static inline int crypto_cipher_decrypt_iv(struct crypto_tfm *tfm,
878                                            struct scatterlist *dst,
879                                            struct scatterlist *src,
880                                            unsigned int nbytes, u8 *iv)
881 {
882         BUG_ON(crypto_tfm_alg_type(tfm) != CRYPTO_ALG_TYPE_CIPHER);
883         return tfm->crt_cipher.cit_decrypt_iv(tfm, dst, src, nbytes, iv);
884 }
885
886 static void crypto_cipher_set_iv(struct crypto_tfm *tfm,
887                                  const u8 *src, unsigned int len) __deprecated;
888 static inline void crypto_cipher_set_iv(struct crypto_tfm *tfm,
889                                         const u8 *src, unsigned int len)
890 {
891         BUG_ON(crypto_tfm_alg_type(tfm) != CRYPTO_ALG_TYPE_CIPHER);
892         memcpy(tfm->crt_cipher.cit_iv, src, len);
893 }
894
895 static void crypto_cipher_get_iv(struct crypto_tfm *tfm,
896                                  u8 *dst, unsigned int len) __deprecated;
897 static inline void crypto_cipher_get_iv(struct crypto_tfm *tfm,
898                                         u8 *dst, unsigned int len)
899 {
900         BUG_ON(crypto_tfm_alg_type(tfm) != CRYPTO_ALG_TYPE_CIPHER);
901         memcpy(dst, tfm->crt_cipher.cit_iv, len);
902 }
903
904 static inline struct crypto_comp *__crypto_comp_cast(struct crypto_tfm *tfm)
905 {
906         return (struct crypto_comp *)tfm;
907 }
908
909 static inline struct crypto_comp *crypto_comp_cast(struct crypto_tfm *tfm)
910 {
911         BUG_ON((crypto_tfm_alg_type(tfm) ^ CRYPTO_ALG_TYPE_COMPRESS) &
912                CRYPTO_ALG_TYPE_MASK);
913         return __crypto_comp_cast(tfm);
914 }
915
916 static inline struct crypto_comp *crypto_alloc_comp(const char *alg_name,
917                                                     u32 type, u32 mask)
918 {
919         type &= ~CRYPTO_ALG_TYPE_MASK;
920         type |= CRYPTO_ALG_TYPE_COMPRESS;
921         mask |= CRYPTO_ALG_TYPE_MASK;
922
923         return __crypto_comp_cast(crypto_alloc_base(alg_name, type, mask));
924 }
925
926 static inline struct crypto_tfm *crypto_comp_tfm(struct crypto_comp *tfm)
927 {
928         return tfm;
929 }
930
931 static inline void crypto_free_comp(struct crypto_comp *tfm)
932 {
933         crypto_free_tfm(crypto_comp_tfm(tfm));
934 }
935
936 static inline int crypto_has_comp(const char *alg_name, u32 type, u32 mask)
937 {
938         type &= ~CRYPTO_ALG_TYPE_MASK;
939         type |= CRYPTO_ALG_TYPE_COMPRESS;
940         mask |= CRYPTO_ALG_TYPE_MASK;
941
942         return crypto_has_alg(alg_name, type, mask);
943 }
944
945 static inline const char *crypto_comp_name(struct crypto_comp *tfm)
946 {
947         return crypto_tfm_alg_name(crypto_comp_tfm(tfm));
948 }
949
950 static inline struct compress_tfm *crypto_comp_crt(struct crypto_comp *tfm)
951 {
952         return &crypto_comp_tfm(tfm)->crt_compress;
953 }
954
955 static inline int crypto_comp_compress(struct crypto_comp *tfm,
956                                        const u8 *src, unsigned int slen,
957                                        u8 *dst, unsigned int *dlen)
958 {
959         return crypto_comp_crt(tfm)->cot_compress(tfm, src, slen, dst, dlen);
960 }
961
962 static inline int crypto_comp_decompress(struct crypto_comp *tfm,
963                                          const u8 *src, unsigned int slen,
964                                          u8 *dst, unsigned int *dlen)
965 {
966         return crypto_comp_crt(tfm)->cot_decompress(tfm, src, slen, dst, dlen);
967 }
968
969 #endif  /* _LINUX_CRYPTO_H */
970