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_has_alg(const char *name, u32 type, u32 mask);
 245 #else
 246 static inline int crypto_alg_available(const char *name, u32 flags)
 247 {
 248         return 0;
 249 }
 250
 251 static inline int crypto_has_alg(const char *name, u32 type, u32 mask)
 252 {
 253         return 0;
 254 }
 255 #endif
 256
 257 /*
 258  * Transforms: user-instantiated objects which encapsulate algorithms
 259  * and core processing logic.  Managed via crypto_alloc_*() and
 260  * crypto_free_*(), as well as the various helpers below.
 261  */
 262
 263 struct blkcipher_tfm {
 264         void *iv;
 265         int (*setkey)(struct crypto_tfm *tfm, const u8 *key,
 266                       unsigned int keylen);
 267         int (*encrypt)(struct blkcipher_desc *desc, struct scatterlist *dst,
 268                        struct scatterlist *src, unsigned int nbytes);
 269         int (*decrypt)(struct blkcipher_desc *desc, struct scatterlist *dst,
 270                        struct scatterlist *src, unsigned int nbytes);
 271 };
 272
 273 struct cipher_tfm {
 274         void *cit_iv;
 275         unsigned int cit_ivsize;
 276         u32 cit_mode;
 277         int (*cit_setkey)(struct crypto_tfm *tfm,
 278                           const u8 *key, unsigned int keylen);
 279         int (*cit_encrypt)(struct crypto_tfm *tfm,
 280                            struct scatterlist *dst,
 281                            struct scatterlist *src,
 282                            unsigned int nbytes);
 283         int (*cit_encrypt_iv)(struct crypto_tfm *tfm,
 284                               struct scatterlist *dst,
 285                               struct scatterlist *src,
 286                               unsigned int nbytes, u8 *iv);
 287         int (*cit_decrypt)(struct crypto_tfm *tfm,
 288                            struct scatterlist *dst,
 289                            struct scatterlist *src,
 290                            unsigned int nbytes);
 291         int (*cit_decrypt_iv)(struct crypto_tfm *tfm,
 292                            struct scatterlist *dst,
 293                            struct scatterlist *src,
 294                            unsigned int nbytes, u8 *iv);
 295         void (*cit_xor_block)(u8 *dst, const u8 *src);
 296         void (*cit_encrypt_one)(struct crypto_tfm *tfm, u8 *dst, const u8 *src);
 297         void (*cit_decrypt_one)(struct crypto_tfm *tfm, u8 *dst, const u8 *src);
 298 };
 299
 300 struct hash_tfm {
 301         int (*init)(struct hash_desc *desc);
 302         int (*update)(struct hash_desc *desc,
 303                       struct scatterlist *sg, unsigned int nsg);
 304         void (*update_kernel)(struct hash_desc *desc,
 305                               const void *data, size_t count);
 306         int (*final)(struct hash_desc *desc, u8 *out);
 307         int (*digest)(struct hash_desc *desc, struct scatterlist *sg,
 308                       unsigned int nsg, u8 *out);
 309         int (*setkey)(struct crypto_hash *tfm, const u8 *key,
 310                       unsigned int keylen);
 311         unsigned int digestsize;
 312 };
 313
 314 struct compress_tfm {
 315         int (*cot_compress)(struct crypto_tfm *tfm,
 316                             const u8 *src, unsigned int slen,
 317                             u8 *dst, unsigned int *dlen);
 318         int (*cot_decompress)(struct crypto_tfm *tfm,
 319                               const u8 *src, unsigned int slen,
 320                               u8 *dst, unsigned int *dlen);
 321 };
 322
 323 #define crt_blkcipher   crt_u.blkcipher
 324 #define crt_cipher      crt_u.cipher
 325 #define crt_hash        crt_u.hash
 326 #define crt_compress    crt_u.compress
 327
 328 struct crypto_tfm {
 329
 330         u32 crt_flags;
 331
 332         union {
 333                 struct blkcipher_tfm blkcipher;
 334                 struct cipher_tfm cipher;
 335                 struct hash_tfm hash;
 336                 struct compress_tfm compress;
 337         } crt_u;
 338
 339         struct crypto_alg *__crt_alg;
 340
 341         void *__crt_ctx[] CRYPTO_MINALIGN_ATTR;
 342 };
 343
 344 #define crypto_cipher crypto_tfm
 345 #define crypto_comp crypto_tfm
 346
 347 struct crypto_blkcipher {
 348         struct crypto_tfm base;
 349 };
 350
 351 struct crypto_hash {
 352         struct crypto_tfm base;
 353 };
 354
 355 enum {
 356         CRYPTOA_UNSPEC,
 357         CRYPTOA_ALG,
 358 };
 359
 360 struct crypto_attr_alg {
 361         char name[CRYPTO_MAX_ALG_NAME];
 362 };
 363
 364 /*
 365  * Transform user interface.
 366  */
 367
 368 struct crypto_tfm *crypto_alloc_tfm(const char *alg_name, u32 tfm_flags);
 369 struct crypto_tfm *crypto_alloc_tfm2(const char *alg_name, u32 tfm_flags,
 370                 int nomodload);
 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 static inline struct crypto_hash *__crypto_hash_cast(struct crypto_tfm *tfm)
 711 {
 712         return (struct crypto_hash *)tfm;
 713 }
 714
 715 static inline struct crypto_hash *crypto_hash_cast(struct crypto_tfm *tfm)
 716 {
 717         BUG_ON((crypto_tfm_alg_type(tfm) ^ CRYPTO_ALG_TYPE_HASH) &
 718                CRYPTO_ALG_TYPE_HASH_MASK);
 719         return __crypto_hash_cast(tfm);
 720 }
 721
 722 static inline struct crypto_hash *crypto_alloc_hash(const char *alg_name,
 723                                                     u32 type, u32 mask)
 724 {
 725         type &= ~CRYPTO_ALG_TYPE_MASK;
 726         type |= CRYPTO_ALG_TYPE_HASH;
 727         mask |= CRYPTO_ALG_TYPE_HASH_MASK;
 728
 729         return __crypto_hash_cast(crypto_alloc_base(alg_name, type, mask));
 730 }
 731
 732 static inline struct crypto_tfm *crypto_hash_tfm(struct crypto_hash *tfm)
 733 {
 734         return &tfm->base;
 735 }
 736
 737 static inline void crypto_free_hash(struct crypto_hash *tfm)
 738 {
 739         crypto_free_tfm(crypto_hash_tfm(tfm));
 740 }
 741
 742 static inline int crypto_has_hash(const char *alg_name, u32 type, u32 mask)
 743 {
 744         type &= ~CRYPTO_ALG_TYPE_MASK;
 745         type |= CRYPTO_ALG_TYPE_HASH;
 746         mask |= CRYPTO_ALG_TYPE_HASH_MASK;
 747
 748         return crypto_has_alg(alg_name, type, mask);
 749 }
 750
 751 static inline struct hash_tfm *crypto_hash_crt(struct crypto_hash *tfm)
 752 {
 753         return &crypto_hash_tfm(tfm)->crt_hash;
 754 }
 755
 756 static inline unsigned int crypto_hash_blocksize(struct crypto_hash *tfm)
 757 {
 758         return crypto_tfm_alg_blocksize(crypto_hash_tfm(tfm));
 759 }
 760
 761 static inline unsigned int crypto_hash_alignmask(struct crypto_hash *tfm)
 762 {
 763         return crypto_tfm_alg_alignmask(crypto_hash_tfm(tfm));
 764 }
 765
 766 static inline unsigned int crypto_hash_digestsize(struct crypto_hash *tfm)
 767 {
 768         return crypto_hash_crt(tfm)->digestsize;
 769 }
 770
 771 static inline u32 crypto_hash_get_flags(struct crypto_hash *tfm)
 772 {
 773         return crypto_tfm_get_flags(crypto_hash_tfm(tfm));
 774 }
 775
 776 static inline void crypto_hash_set_flags(struct crypto_hash *tfm, u32 flags)
 777 {
 778         crypto_tfm_set_flags(crypto_hash_tfm(tfm), flags);
 779 }
 780
 781 static inline void crypto_hash_clear_flags(struct crypto_hash *tfm, u32 flags)
 782 {
 783         crypto_tfm_clear_flags(crypto_hash_tfm(tfm), flags);
 784 }
 785
 786 static inline int crypto_hash_init(struct hash_desc *desc)
 787 {
 788         return crypto_hash_crt(desc->tfm)->init(desc);
 789 }
 790
 791 static inline int crypto_hash_update(struct hash_desc *desc,
 792                                      struct scatterlist *sg,
 793                                      unsigned int nbytes)
 794 {
 795         return crypto_hash_crt(desc->tfm)->update(desc, sg, nbytes);
 796 }
 797
 798 static inline void crypto_hash_update_kernel(struct hash_desc *desc,
 799                                              const void *data,
 800                                              size_t count)
 801 {
 802         return crypto_hash_crt(desc->tfm)->update_kernel(desc, data, count);
 803 }
 804
 805 static inline int crypto_hash_final(struct hash_desc *desc, u8 *out)
 806 {
 807         return crypto_hash_crt(desc->tfm)->final(desc, out);
 808 }
 809
 810 static inline int crypto_hash_digest(struct hash_desc *desc,
 811                                      struct scatterlist *sg,
 812                                      unsigned int nbytes, u8 *out)
 813 {
 814         return crypto_hash_crt(desc->tfm)->digest(desc, sg, nbytes, out);
 815 }
 816
 817 static inline int crypto_hash_setkey(struct crypto_hash *hash,
 818                                      const u8 *key, unsigned int keylen)
 819 {
 820         return crypto_hash_crt(hash)->setkey(hash, key, keylen);
 821 }
 822
 823 static int crypto_cipher_encrypt(struct crypto_tfm *tfm,
 824                                  struct scatterlist *dst,
 825                                  struct scatterlist *src,
 826                                  unsigned int nbytes) __deprecated;
 827 static inline int crypto_cipher_encrypt(struct crypto_tfm *tfm,
 828                                         struct scatterlist *dst,
 829                                         struct scatterlist *src,
 830                                         unsigned int nbytes)
 831 {
 832         BUG_ON(crypto_tfm_alg_type(tfm) != CRYPTO_ALG_TYPE_CIPHER);
 833         return tfm->crt_cipher.cit_encrypt(tfm, dst, src, nbytes);
 834 }
 835
 836 static int crypto_cipher_encrypt_iv(struct crypto_tfm *tfm,
 837                                     struct scatterlist *dst,
 838                                     struct scatterlist *src,
 839                                     unsigned int nbytes, u8 *iv) __deprecated;
 840 static inline int crypto_cipher_encrypt_iv(struct crypto_tfm *tfm,
 841                                            struct scatterlist *dst,
 842                                            struct scatterlist *src,
 843                                            unsigned int nbytes, u8 *iv)
 844 {
 845         BUG_ON(crypto_tfm_alg_type(tfm) != CRYPTO_ALG_TYPE_CIPHER);
 846         return tfm->crt_cipher.cit_encrypt_iv(tfm, dst, src, nbytes, iv);
 847 }
 848
 849 static int crypto_cipher_decrypt(struct crypto_tfm *tfm,
 850                                  struct scatterlist *dst,
 851                                  struct scatterlist *src,
 852                                  unsigned int nbytes) __deprecated;
 853 static inline int crypto_cipher_decrypt(struct crypto_tfm *tfm,
 854                                         struct scatterlist *dst,
 855                                         struct scatterlist *src,
 856                                         unsigned int nbytes)
 857 {
 858         BUG_ON(crypto_tfm_alg_type(tfm) != CRYPTO_ALG_TYPE_CIPHER);
 859         return tfm->crt_cipher.cit_decrypt(tfm, dst, src, nbytes);
 860 }
 861
 862 static int crypto_cipher_decrypt_iv(struct crypto_tfm *tfm,
 863                                     struct scatterlist *dst,
 864                                     struct scatterlist *src,
 865                                     unsigned int nbytes, u8 *iv) __deprecated;
 866 static inline int crypto_cipher_decrypt_iv(struct crypto_tfm *tfm,
 867                                            struct scatterlist *dst,
 868                                            struct scatterlist *src,
 869                                            unsigned int nbytes, u8 *iv)
 870 {
 871         BUG_ON(crypto_tfm_alg_type(tfm) != CRYPTO_ALG_TYPE_CIPHER);
 872         return tfm->crt_cipher.cit_decrypt_iv(tfm, dst, src, nbytes, iv);
 873 }
 874
 875 static void crypto_cipher_set_iv(struct crypto_tfm *tfm,
 876                                  const u8 *src, unsigned int len) __deprecated;
 877 static inline void crypto_cipher_set_iv(struct crypto_tfm *tfm,
 878                                         const u8 *src, unsigned int len)
 879 {
 880         BUG_ON(crypto_tfm_alg_type(tfm) != CRYPTO_ALG_TYPE_CIPHER);
 881         memcpy(tfm->crt_cipher.cit_iv, src, len);
 882 }
 883
 884 static void crypto_cipher_get_iv(struct crypto_tfm *tfm,
 885                                  u8 *dst, unsigned int len) __deprecated;
 886 static inline void crypto_cipher_get_iv(struct crypto_tfm *tfm,
 887                                         u8 *dst, unsigned int len)
 888 {
 889         BUG_ON(crypto_tfm_alg_type(tfm) != CRYPTO_ALG_TYPE_CIPHER);
 890         memcpy(dst, tfm->crt_cipher.cit_iv, len);
 891 }
 892
 893 static inline struct crypto_comp *__crypto_comp_cast(struct crypto_tfm *tfm)
 894 {
 895         return (struct crypto_comp *)tfm;
 896 }
 897
 898 static inline struct crypto_comp *crypto_comp_cast(struct crypto_tfm *tfm)
 899 {
 900         BUG_ON((crypto_tfm_alg_type(tfm) ^ CRYPTO_ALG_TYPE_COMPRESS) &
 901                CRYPTO_ALG_TYPE_MASK);
 902         return __crypto_comp_cast(tfm);
 903 }
 904
 905 static inline struct crypto_comp *crypto_alloc_comp(const char *alg_name,
 906                                                     u32 type, u32 mask)
 907 {
 908         type &= ~CRYPTO_ALG_TYPE_MASK;
 909         type |= CRYPTO_ALG_TYPE_COMPRESS;
 910         mask |= CRYPTO_ALG_TYPE_MASK;
 911
 912         return __crypto_comp_cast(crypto_alloc_base(alg_name, type, mask));
 913 }
 914
 915 static inline struct crypto_tfm *crypto_comp_tfm(struct crypto_comp *tfm)
 916 {
 917         return tfm;
 918 }
 919
 920 static inline void crypto_free_comp(struct crypto_comp *tfm)
 921 {
 922         crypto_free_tfm(crypto_comp_tfm(tfm));
 923 }
 924
 925 static inline int crypto_has_comp(const char *alg_name, u32 type, u32 mask)
 926 {
 927         type &= ~CRYPTO_ALG_TYPE_MASK;
 928         type |= CRYPTO_ALG_TYPE_COMPRESS;
 929         mask |= CRYPTO_ALG_TYPE_MASK;
 930
 931         return crypto_has_alg(alg_name, type, mask);
 932 }
 933
 934 static inline const char *crypto_comp_name(struct crypto_comp *tfm)
 935 {
 936         return crypto_tfm_alg_name(crypto_comp_tfm(tfm));
 937 }
 938
 939 static inline struct compress_tfm *crypto_comp_crt(struct crypto_comp *tfm)
 940 {
 941         return &crypto_comp_tfm(tfm)->crt_compress;
 942 }
 943
 944 static inline int crypto_comp_compress(struct crypto_comp *tfm,
 945                                        const u8 *src, unsigned int slen,
 946                                        u8 *dst, unsigned int *dlen)
 947 {
 948         return crypto_comp_crt(tfm)->cot_compress(tfm, src, slen, dst, dlen);
 949 }
 950
 951 static inline int crypto_comp_decompress(struct crypto_comp *tfm,
 952                                          const u8 *src, unsigned int slen,
 953                                          u8 *dst, unsigned int *dlen)
 954 {
 955         return crypto_comp_crt(tfm)->cot_decompress(tfm, src, slen, dst, dlen);
 956 }
 957
 958 #endif  /* _LINUX_CRYPTO_H */
 959