Pileus Git - ~andy/linux/blob - 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 int crypto_has_alg(const char *name, u32 type, u32 mask);
 246 #else
 247 static inline int crypto_alg_available(const char *name, u32 flags)
 248 {
 249         return 0;
 250 }
 251
 252 static inline int crypto_has_alg(const char *name, u32 type, u32 mask)
 253 {
 254         return 0;
 255 }
 256 #endif
 257
 258 /*
 259  * Transforms: user-instantiated objects which encapsulate algorithms
 260  * and core processing logic.  Managed via crypto_alloc_*() and
 261  * crypto_free_*(), as well as the various helpers below.
 262  */
 263
 264 struct blkcipher_tfm {
 265         void *iv;
 266         int (*setkey)(struct crypto_tfm *tfm, const u8 *key,
 267                       unsigned int keylen);
 268         int (*encrypt)(struct blkcipher_desc *desc, struct scatterlist *dst,
 269                        struct scatterlist *src, unsigned int nbytes);
 270         int (*decrypt)(struct blkcipher_desc *desc, struct scatterlist *dst,
 271                        struct scatterlist *src, unsigned int nbytes);
 272 };
 273
 274 struct cipher_tfm {
 275         void *cit_iv;
 276         unsigned int cit_ivsize;
 277         u32 cit_mode;
 278         int (*cit_setkey)(struct crypto_tfm *tfm,
 279                           const u8 *key, unsigned int keylen);
 280         int (*cit_encrypt)(struct crypto_tfm *tfm,
 281                            struct scatterlist *dst,
 282                            struct scatterlist *src,
 283                            unsigned int nbytes);
 284         int (*cit_encrypt_iv)(struct crypto_tfm *tfm,
 285                               struct scatterlist *dst,
 286                               struct scatterlist *src,
 287                               unsigned int nbytes, u8 *iv);
 288         int (*cit_decrypt)(struct crypto_tfm *tfm,
 289                            struct scatterlist *dst,
 290                            struct scatterlist *src,
 291                            unsigned int nbytes);
 292         int (*cit_decrypt_iv)(struct crypto_tfm *tfm,
 293                            struct scatterlist *dst,
 294                            struct scatterlist *src,
 295                            unsigned int nbytes, u8 *iv);
 296         void (*cit_xor_block)(u8 *dst, const u8 *src);
 297         void (*cit_encrypt_one)(struct crypto_tfm *tfm, u8 *dst, const u8 *src);
 298         void (*cit_decrypt_one)(struct crypto_tfm *tfm, u8 *dst, const u8 *src);
 299 };
 300
 301 struct hash_tfm {
 302         int (*init)(struct hash_desc *desc);
 303         int (*update)(struct hash_desc *desc,
 304                       struct scatterlist *sg, unsigned int nsg);
 305         int (*final)(struct hash_desc *desc, u8 *out);
 306         int (*digest)(struct hash_desc *desc, struct scatterlist *sg,
 307                       unsigned int nsg, u8 *out);
 308         int (*setkey)(struct crypto_hash *tfm, const u8 *key,
 309                       unsigned int keylen);
 310         unsigned int digestsize;
 311 };
 312
 313 struct compress_tfm {
 314         int (*cot_compress)(struct crypto_tfm *tfm,
 315                             const u8 *src, unsigned int slen,
 316                             u8 *dst, unsigned int *dlen);
 317         int (*cot_decompress)(struct crypto_tfm *tfm,
 318                               const u8 *src, unsigned int slen,
 319                               u8 *dst, unsigned int *dlen);
 320 };
 321
 322 #define crt_blkcipher   crt_u.blkcipher
 323 #define crt_cipher      crt_u.cipher
 324 #define crt_hash        crt_u.hash
 325 #define crt_compress    crt_u.compress
 326
 327 struct crypto_tfm {
 328
 329         u32 crt_flags;
 330
 331         union {
 332                 struct blkcipher_tfm blkcipher;
 333                 struct cipher_tfm cipher;
 334                 struct hash_tfm hash;
 335                 struct compress_tfm compress;
 336         } crt_u;
 337
 338         struct crypto_alg *__crt_alg;
 339
 340         void *__crt_ctx[] CRYPTO_MINALIGN_ATTR;
 341 };
 342
 343 #define crypto_cipher crypto_tfm
 344 #define crypto_comp crypto_tfm
 345
 346 struct crypto_blkcipher {
 347         struct crypto_tfm base;
 348 };
 349
 350 struct crypto_hash {
 351         struct crypto_tfm base;
 352 };
 353
 354 enum {
 355         CRYPTOA_UNSPEC,
 356         CRYPTOA_ALG,
 357 };
 358
 359 struct crypto_attr_alg {
 360         char name[CRYPTO_MAX_ALG_NAME];
 361 };
 362
 363 /*
 364  * Transform user interface.
 365  */
 366
 367 struct crypto_tfm *crypto_alloc_tfm(const char *alg_name, u32 tfm_flags);
 368 struct crypto_tfm *crypto_alloc_base(const char *alg_name, u32 type, u32 mask);
 369 void crypto_free_tfm(struct crypto_tfm *tfm);
 370
 371 /*
 372  * Transform helpers which query the underlying algorithm.
 373  */
 374 static inline const char *crypto_tfm_alg_name(struct crypto_tfm *tfm)
 375 {
 376         return tfm->__crt_alg->cra_name;
 377 }
 378
 379 static inline const char *crypto_tfm_alg_driver_name(struct crypto_tfm *tfm)
 380 {
 381         return tfm->__crt_alg->cra_driver_name;
 382 }
 383
 384 static inline int crypto_tfm_alg_priority(struct crypto_tfm *tfm)
 385 {
 386         return tfm->__crt_alg->cra_priority;
 387 }
 388
 389 static inline const char *crypto_tfm_alg_modname(struct crypto_tfm *tfm)
 390 {
 391         return module_name(tfm->__crt_alg->cra_module);
 392 }
 393
 394 static inline u32 crypto_tfm_alg_type(struct crypto_tfm *tfm)
 395 {
 396         return tfm->__crt_alg->cra_flags & CRYPTO_ALG_TYPE_MASK;
 397 }
 398
 399 static unsigned int crypto_tfm_alg_min_keysize(struct crypto_tfm *tfm)
 400         __deprecated;
 401 static inline unsigned int crypto_tfm_alg_min_keysize(struct crypto_tfm *tfm)
 402 {
 403         BUG_ON(crypto_tfm_alg_type(tfm) != CRYPTO_ALG_TYPE_CIPHER);
 404         return tfm->__crt_alg->cra_cipher.cia_min_keysize;
 405 }
 406
 407 static unsigned int crypto_tfm_alg_max_keysize(struct crypto_tfm *tfm)
 408         __deprecated;
 409 static inline unsigned int crypto_tfm_alg_max_keysize(struct crypto_tfm *tfm)
 410 {
 411         BUG_ON(crypto_tfm_alg_type(tfm) != CRYPTO_ALG_TYPE_CIPHER);
 412         return tfm->__crt_alg->cra_cipher.cia_max_keysize;
 413 }
 414
 415 static unsigned int crypto_tfm_alg_ivsize(struct crypto_tfm *tfm) __deprecated;
 416 static inline unsigned int crypto_tfm_alg_ivsize(struct crypto_tfm *tfm)
 417 {
 418         BUG_ON(crypto_tfm_alg_type(tfm) != CRYPTO_ALG_TYPE_CIPHER);
 419         return tfm->crt_cipher.cit_ivsize;
 420 }
 421
 422 static inline unsigned int crypto_tfm_alg_blocksize(struct crypto_tfm *tfm)
 423 {
 424         return tfm->__crt_alg->cra_blocksize;
 425 }
 426
 427 static inline unsigned int crypto_tfm_alg_digestsize(struct crypto_tfm *tfm)
 428 {
 429         BUG_ON(crypto_tfm_alg_type(tfm) != CRYPTO_ALG_TYPE_DIGEST);
 430         return tfm->__crt_alg->cra_digest.dia_digestsize;
 431 }
 432
 433 static inline unsigned int crypto_tfm_alg_alignmask(struct crypto_tfm *tfm)
 434 {
 435         return tfm->__crt_alg->cra_alignmask;
 436 }
 437
 438 static inline u32 crypto_tfm_get_flags(struct crypto_tfm *tfm)
 439 {
 440         return tfm->crt_flags;
 441 }
 442
 443 static inline void crypto_tfm_set_flags(struct crypto_tfm *tfm, u32 flags)
 444 {
 445         tfm->crt_flags |= flags;
 446 }
 447
 448 static inline void crypto_tfm_clear_flags(struct crypto_tfm *tfm, u32 flags)
 449 {
 450         tfm->crt_flags &= ~flags;
 451 }
 452
 453 static inline void *crypto_tfm_ctx(struct crypto_tfm *tfm)
 454 {
 455         return tfm->__crt_ctx;
 456 }
 457
 458 static inline unsigned int crypto_tfm_ctx_alignment(void)
 459 {
 460         struct crypto_tfm *tfm;
 461         return __alignof__(tfm->__crt_ctx);
 462 }
 463
 464 /*
 465  * API wrappers.
 466  */
 467 static inline struct crypto_blkcipher *__crypto_blkcipher_cast(
 468         struct crypto_tfm *tfm)
 469 {
 470         return (struct crypto_blkcipher *)tfm;
 471 }
 472
 473 static inline struct crypto_blkcipher *crypto_blkcipher_cast(
 474         struct crypto_tfm *tfm)
 475 {
 476         BUG_ON(crypto_tfm_alg_type(tfm) != CRYPTO_ALG_TYPE_BLKCIPHER);
 477         return __crypto_blkcipher_cast(tfm);
 478 }
 479
 480 static inline struct crypto_blkcipher *crypto_alloc_blkcipher(
 481         const char *alg_name, u32 type, u32 mask)
 482 {
 483         type &= ~CRYPTO_ALG_TYPE_MASK;
 484         type |= CRYPTO_ALG_TYPE_BLKCIPHER;
 485         mask |= CRYPTO_ALG_TYPE_MASK;
 486
 487         return __crypto_blkcipher_cast(crypto_alloc_base(alg_name, type, mask));
 488 }
 489
 490 static inline struct crypto_tfm *crypto_blkcipher_tfm(
 491         struct crypto_blkcipher *tfm)
 492 {
 493         return &tfm->base;
 494 }
 495
 496 static inline void crypto_free_blkcipher(struct crypto_blkcipher *tfm)
 497 {
 498         crypto_free_tfm(crypto_blkcipher_tfm(tfm));
 499 }
 500
 501 static inline int crypto_has_blkcipher(const char *alg_name, u32 type, u32 mask)
 502 {
 503         type &= ~CRYPTO_ALG_TYPE_MASK;
 504         type |= CRYPTO_ALG_TYPE_BLKCIPHER;
 505         mask |= CRYPTO_ALG_TYPE_MASK;
 506
 507         return crypto_has_alg(alg_name, type, mask);
 508 }
 509
 510 static inline const char *crypto_blkcipher_name(struct crypto_blkcipher *tfm)
 511 {
 512         return crypto_tfm_alg_name(crypto_blkcipher_tfm(tfm));
 513 }
 514
 515 static inline struct blkcipher_tfm *crypto_blkcipher_crt(
 516         struct crypto_blkcipher *tfm)
 517 {
 518         return &crypto_blkcipher_tfm(tfm)->crt_blkcipher;
 519 }
 520
 521 static inline struct blkcipher_alg *crypto_blkcipher_alg(
 522         struct crypto_blkcipher *tfm)
 523 {
 524         return &crypto_blkcipher_tfm(tfm)->__crt_alg->cra_blkcipher;
 525 }
 526
 527 static inline unsigned int crypto_blkcipher_ivsize(struct crypto_blkcipher *tfm)
 528 {
 529         return crypto_blkcipher_alg(tfm)->ivsize;
 530 }
 531
 532 static inline unsigned int crypto_blkcipher_blocksize(
 533         struct crypto_blkcipher *tfm)
 534 {
 535         return crypto_tfm_alg_blocksize(crypto_blkcipher_tfm(tfm));
 536 }
 537
 538 static inline unsigned int crypto_blkcipher_alignmask(
 539         struct crypto_blkcipher *tfm)
 540 {
 541         return crypto_tfm_alg_alignmask(crypto_blkcipher_tfm(tfm));
 542 }
 543
 544 static inline u32 crypto_blkcipher_get_flags(struct crypto_blkcipher *tfm)
 545 {
 546         return crypto_tfm_get_flags(crypto_blkcipher_tfm(tfm));
 547 }
 548
 549 static inline void crypto_blkcipher_set_flags(struct crypto_blkcipher *tfm,
 550                                               u32 flags)
 551 {
 552         crypto_tfm_set_flags(crypto_blkcipher_tfm(tfm), flags);
 553 }
 554
 555 static inline void crypto_blkcipher_clear_flags(struct crypto_blkcipher *tfm,
 556                                                 u32 flags)
 557 {
 558         crypto_tfm_clear_flags(crypto_blkcipher_tfm(tfm), flags);
 559 }
 560
 561 static inline int crypto_blkcipher_setkey(struct crypto_blkcipher *tfm,
 562                                           const u8 *key, unsigned int keylen)
 563 {
 564         return crypto_blkcipher_crt(tfm)->setkey(crypto_blkcipher_tfm(tfm),
 565                                                  key, keylen);
 566 }
 567
 568 static inline int crypto_blkcipher_encrypt(struct blkcipher_desc *desc,
 569                                            struct scatterlist *dst,
 570                                            struct scatterlist *src,
 571                                            unsigned int nbytes)
 572 {
 573         desc->info = crypto_blkcipher_crt(desc->tfm)->iv;
 574         return crypto_blkcipher_crt(desc->tfm)->encrypt(desc, dst, src, nbytes);
 575 }
 576
 577 static inline int crypto_blkcipher_encrypt_iv(struct blkcipher_desc *desc,
 578                                               struct scatterlist *dst,
 579                                               struct scatterlist *src,
 580                                               unsigned int nbytes)
 581 {
 582         return crypto_blkcipher_crt(desc->tfm)->encrypt(desc, dst, src, nbytes);
 583 }
 584
 585 static inline int crypto_blkcipher_decrypt(struct blkcipher_desc *desc,
 586                                            struct scatterlist *dst,
 587                                            struct scatterlist *src,
 588                                            unsigned int nbytes)
 589 {
 590         desc->info = crypto_blkcipher_crt(desc->tfm)->iv;
 591         return crypto_blkcipher_crt(desc->tfm)->decrypt(desc, dst, src, nbytes);
 592 }
 593
 594 static inline int crypto_blkcipher_decrypt_iv(struct blkcipher_desc *desc,
 595                                               struct scatterlist *dst,
 596                                               struct scatterlist *src,
 597                                               unsigned int nbytes)
 598 {
 599         return crypto_blkcipher_crt(desc->tfm)->decrypt(desc, dst, src, nbytes);
 600 }
 601
 602 static inline void crypto_blkcipher_set_iv(struct crypto_blkcipher *tfm,
 603                                            const u8 *src, unsigned int len)
 604 {
 605         memcpy(crypto_blkcipher_crt(tfm)->iv, src, len);
 606 }
 607
 608 static inline void crypto_blkcipher_get_iv(struct crypto_blkcipher *tfm,
 609                                            u8 *dst, unsigned int len)
 610 {
 611         memcpy(dst, crypto_blkcipher_crt(tfm)->iv, len);
 612 }
 613
 614 static inline struct crypto_cipher *__crypto_cipher_cast(struct crypto_tfm *tfm)
 615 {
 616         return (struct crypto_cipher *)tfm;
 617 }
 618
 619 static inline struct crypto_cipher *crypto_cipher_cast(struct crypto_tfm *tfm)
 620 {
 621         BUG_ON(crypto_tfm_alg_type(tfm) != CRYPTO_ALG_TYPE_CIPHER);
 622         return __crypto_cipher_cast(tfm);
 623 }
 624
 625 static inline struct crypto_cipher *crypto_alloc_cipher(const char *alg_name,
 626                                                         u32 type, u32 mask)
 627 {
 628         type &= ~CRYPTO_ALG_TYPE_MASK;
 629         type |= CRYPTO_ALG_TYPE_CIPHER;
 630         mask |= CRYPTO_ALG_TYPE_MASK;
 631
 632         return __crypto_cipher_cast(crypto_alloc_base(alg_name, type, mask));
 633 }
 634
 635 static inline struct crypto_tfm *crypto_cipher_tfm(struct crypto_cipher *tfm)
 636 {
 637         return tfm;
 638 }
 639
 640 static inline void crypto_free_cipher(struct crypto_cipher *tfm)
 641 {
 642         crypto_free_tfm(crypto_cipher_tfm(tfm));
 643 }
 644
 645 static inline int crypto_has_cipher(const char *alg_name, u32 type, u32 mask)
 646 {
 647         type &= ~CRYPTO_ALG_TYPE_MASK;
 648         type |= CRYPTO_ALG_TYPE_CIPHER;
 649         mask |= CRYPTO_ALG_TYPE_MASK;
 650
 651         return crypto_has_alg(alg_name, type, mask);
 652 }
 653
 654 static inline struct cipher_tfm *crypto_cipher_crt(struct crypto_cipher *tfm)
 655 {
 656         return &crypto_cipher_tfm(tfm)->crt_cipher;
 657 }
 658
 659 static inline unsigned int crypto_cipher_blocksize(struct crypto_cipher *tfm)
 660 {
 661         return crypto_tfm_alg_blocksize(crypto_cipher_tfm(tfm));
 662 }
 663
 664 static inline unsigned int crypto_cipher_alignmask(struct crypto_cipher *tfm)
 665 {
 666         return crypto_tfm_alg_alignmask(crypto_cipher_tfm(tfm));
 667 }
 668
 669 static inline u32 crypto_cipher_get_flags(struct crypto_cipher *tfm)
 670 {
 671         return crypto_tfm_get_flags(crypto_cipher_tfm(tfm));
 672 }
 673
 674 static inline void crypto_cipher_set_flags(struct crypto_cipher *tfm,
 675                                            u32 flags)
 676 {
 677         crypto_tfm_set_flags(crypto_cipher_tfm(tfm), flags);
 678 }
 679
 680 static inline void crypto_cipher_clear_flags(struct crypto_cipher *tfm,
 681                                              u32 flags)
 682 {
 683         crypto_tfm_clear_flags(crypto_cipher_tfm(tfm), flags);
 684 }
 685
 686 static inline int crypto_cipher_setkey(struct crypto_cipher *tfm,
 687                                        const u8 *key, unsigned int keylen)
 688 {
 689         return crypto_cipher_crt(tfm)->cit_setkey(crypto_cipher_tfm(tfm),
 690                                                   key, keylen);
 691 }
 692
 693 static inline void crypto_cipher_encrypt_one(struct crypto_cipher *tfm,
 694                                              u8 *dst, const u8 *src)
 695 {
 696         crypto_cipher_crt(tfm)->cit_encrypt_one(crypto_cipher_tfm(tfm),
 697                                                 dst, src);
 698 }
 699
 700 static inline void crypto_cipher_decrypt_one(struct crypto_cipher *tfm,
 701                                              u8 *dst, const u8 *src)
 702 {
 703         crypto_cipher_crt(tfm)->cit_decrypt_one(crypto_cipher_tfm(tfm),
 704                                                 dst, src);
 705 }
 706
 707 void crypto_digest_init(struct crypto_tfm *tfm);
 708 void crypto_digest_update(struct crypto_tfm *tfm,
 709                           struct scatterlist *sg, unsigned int nsg);
 710 void crypto_digest_final(struct crypto_tfm *tfm, u8 *out);
 711 void crypto_digest_digest(struct crypto_tfm *tfm,
 712                           struct scatterlist *sg, unsigned int nsg, u8 *out);
 713
 714 static inline struct crypto_hash *__crypto_hash_cast(struct crypto_tfm *tfm)
 715 {
 716         return (struct crypto_hash *)tfm;
 717 }
 718
 719 static inline struct crypto_hash *crypto_hash_cast(struct crypto_tfm *tfm)
 720 {
 721         BUG_ON((crypto_tfm_alg_type(tfm) ^ CRYPTO_ALG_TYPE_HASH) &
 722                CRYPTO_ALG_TYPE_HASH_MASK);
 723         return __crypto_hash_cast(tfm);
 724 }
 725
 726 static inline int crypto_digest_setkey(struct crypto_tfm *tfm,
 727                                        const u8 *key, unsigned int keylen)
 728 {
 729         return tfm->crt_hash.setkey(crypto_hash_cast(tfm), key, keylen);
 730 }
 731
 732 static inline struct crypto_hash *crypto_alloc_hash(const char *alg_name,
 733                                                     u32 type, u32 mask)
 734 {
 735         type &= ~CRYPTO_ALG_TYPE_MASK;
 736         type |= CRYPTO_ALG_TYPE_HASH;
 737         mask |= CRYPTO_ALG_TYPE_HASH_MASK;
 738
 739         return __crypto_hash_cast(crypto_alloc_base(alg_name, type, mask));
 740 }
 741
 742 static inline struct crypto_tfm *crypto_hash_tfm(struct crypto_hash *tfm)
 743 {
 744         return &tfm->base;
 745 }
 746
 747 static inline void crypto_free_hash(struct crypto_hash *tfm)
 748 {
 749         crypto_free_tfm(crypto_hash_tfm(tfm));
 750 }
 751
 752 static inline int crypto_has_hash(const char *alg_name, u32 type, u32 mask)
 753 {
 754         type &= ~CRYPTO_ALG_TYPE_MASK;
 755         type |= CRYPTO_ALG_TYPE_HASH;
 756         mask |= CRYPTO_ALG_TYPE_HASH_MASK;
 757
 758         return crypto_has_alg(alg_name, type, mask);
 759 }
 760
 761 static inline struct hash_tfm *crypto_hash_crt(struct crypto_hash *tfm)
 762 {
 763         return &crypto_hash_tfm(tfm)->crt_hash;
 764 }
 765
 766 static inline unsigned int crypto_hash_blocksize(struct crypto_hash *tfm)
 767 {
 768         return crypto_tfm_alg_blocksize(crypto_hash_tfm(tfm));
 769 }
 770
 771 static inline unsigned int crypto_hash_alignmask(struct crypto_hash *tfm)
 772 {
 773         return crypto_tfm_alg_alignmask(crypto_hash_tfm(tfm));
 774 }
 775
 776 static inline unsigned int crypto_hash_digestsize(struct crypto_hash *tfm)
 777 {
 778         return crypto_hash_crt(tfm)->digestsize;
 779 }
 780
 781 static inline u32 crypto_hash_get_flags(struct crypto_hash *tfm)
 782 {
 783         return crypto_tfm_get_flags(crypto_hash_tfm(tfm));
 784 }
 785
 786 static inline void crypto_hash_set_flags(struct crypto_hash *tfm, u32 flags)
 787 {
 788         crypto_tfm_set_flags(crypto_hash_tfm(tfm), flags);
 789 }
 790
 791 static inline void crypto_hash_clear_flags(struct crypto_hash *tfm, u32 flags)
 792 {
 793         crypto_tfm_clear_flags(crypto_hash_tfm(tfm), flags);
 794 }
 795
 796 static inline int crypto_hash_init(struct hash_desc *desc)
 797 {
 798         return crypto_hash_crt(desc->tfm)->init(desc);
 799 }
 800
 801 static inline int crypto_hash_update(struct hash_desc *desc,
 802                                      struct scatterlist *sg,
 803                                      unsigned int nbytes)
 804 {
 805         return crypto_hash_crt(desc->tfm)->update(desc, sg, nbytes);
 806 }
 807
 808 static inline int crypto_hash_final(struct hash_desc *desc, u8 *out)
 809 {
 810         return crypto_hash_crt(desc->tfm)->final(desc, out);
 811 }
 812
 813 static inline int crypto_hash_digest(struct hash_desc *desc,
 814                                      struct scatterlist *sg,
 815                                      unsigned int nbytes, u8 *out)
 816 {
 817         return crypto_hash_crt(desc->tfm)->digest(desc, sg, nbytes, out);
 818 }
 819
 820 static inline int crypto_hash_setkey(struct crypto_hash *hash,
 821                                      const u8 *key, unsigned int keylen)
 822 {
 823         return crypto_hash_crt(hash)->setkey(hash, key, keylen);
 824 }
 825
 826 static int crypto_cipher_encrypt(struct crypto_tfm *tfm,
 827                                  struct scatterlist *dst,
 828                                  struct scatterlist *src,
 829                                  unsigned int nbytes) __deprecated;
 830 static inline int crypto_cipher_encrypt(struct crypto_tfm *tfm,
 831                                         struct scatterlist *dst,
 832                                         struct scatterlist *src,
 833                                         unsigned int nbytes)
 834 {
 835         BUG_ON(crypto_tfm_alg_type(tfm) != CRYPTO_ALG_TYPE_CIPHER);
 836         return tfm->crt_cipher.cit_encrypt(tfm, dst, src, nbytes);
 837 }
 838
 839 static int crypto_cipher_encrypt_iv(struct crypto_tfm *tfm,
 840                                     struct scatterlist *dst,
 841                                     struct scatterlist *src,
 842                                     unsigned int nbytes, u8 *iv) __deprecated;
 843 static inline int crypto_cipher_encrypt_iv(struct crypto_tfm *tfm,
 844                                            struct scatterlist *dst,
 845                                            struct scatterlist *src,
 846                                            unsigned int nbytes, u8 *iv)
 847 {
 848         BUG_ON(crypto_tfm_alg_type(tfm) != CRYPTO_ALG_TYPE_CIPHER);
 849         return tfm->crt_cipher.cit_encrypt_iv(tfm, dst, src, nbytes, iv);
 850 }
 851
 852 static int crypto_cipher_decrypt(struct crypto_tfm *tfm,
 853                                  struct scatterlist *dst,
 854                                  struct scatterlist *src,
 855                                  unsigned int nbytes) __deprecated;
 856 static inline int crypto_cipher_decrypt(struct crypto_tfm *tfm,
 857                                         struct scatterlist *dst,
 858                                         struct scatterlist *src,
 859                                         unsigned int nbytes)
 860 {
 861         BUG_ON(crypto_tfm_alg_type(tfm) != CRYPTO_ALG_TYPE_CIPHER);
 862         return tfm->crt_cipher.cit_decrypt(tfm, dst, src, nbytes);
 863 }
 864
 865 static int crypto_cipher_decrypt_iv(struct crypto_tfm *tfm,
 866                                     struct scatterlist *dst,
 867                                     struct scatterlist *src,
 868                                     unsigned int nbytes, u8 *iv) __deprecated;
 869 static inline int crypto_cipher_decrypt_iv(struct crypto_tfm *tfm,
 870                                            struct scatterlist *dst,
 871                                            struct scatterlist *src,
 872                                            unsigned int nbytes, u8 *iv)
 873 {
 874         BUG_ON(crypto_tfm_alg_type(tfm) != CRYPTO_ALG_TYPE_CIPHER);
 875         return tfm->crt_cipher.cit_decrypt_iv(tfm, dst, src, nbytes, iv);
 876 }
 877
 878 static void crypto_cipher_set_iv(struct crypto_tfm *tfm,
 879                                  const u8 *src, unsigned int len) __deprecated;
 880 static inline void crypto_cipher_set_iv(struct crypto_tfm *tfm,
 881                                         const u8 *src, unsigned int len)
 882 {
 883         BUG_ON(crypto_tfm_alg_type(tfm) != CRYPTO_ALG_TYPE_CIPHER);
 884         memcpy(tfm->crt_cipher.cit_iv, src, len);
 885 }
 886
 887 static void crypto_cipher_get_iv(struct crypto_tfm *tfm,
 888                                  u8 *dst, unsigned int len) __deprecated;
 889 static inline void crypto_cipher_get_iv(struct crypto_tfm *tfm,
 890                                         u8 *dst, unsigned int len)
 891 {
 892         BUG_ON(crypto_tfm_alg_type(tfm) != CRYPTO_ALG_TYPE_CIPHER);
 893         memcpy(dst, tfm->crt_cipher.cit_iv, len);
 894 }
 895
 896 static inline struct crypto_comp *__crypto_comp_cast(struct crypto_tfm *tfm)
 897 {
 898         return (struct crypto_comp *)tfm;
 899 }
 900
 901 static inline struct crypto_comp *crypto_comp_cast(struct crypto_tfm *tfm)
 902 {
 903         BUG_ON((crypto_tfm_alg_type(tfm) ^ CRYPTO_ALG_TYPE_COMPRESS) &
 904                CRYPTO_ALG_TYPE_MASK);
 905         return __crypto_comp_cast(tfm);
 906 }
 907
 908 static inline struct crypto_comp *crypto_alloc_comp(const char *alg_name,
 909                                                     u32 type, u32 mask)
 910 {
 911         type &= ~CRYPTO_ALG_TYPE_MASK;
 912         type |= CRYPTO_ALG_TYPE_COMPRESS;
 913         mask |= CRYPTO_ALG_TYPE_MASK;
 914
 915         return __crypto_comp_cast(crypto_alloc_base(alg_name, type, mask));
 916 }
 917
 918 static inline struct crypto_tfm *crypto_comp_tfm(struct crypto_comp *tfm)
 919 {
 920         return tfm;
 921 }
 922
 923 static inline void crypto_free_comp(struct crypto_comp *tfm)
 924 {
 925         crypto_free_tfm(crypto_comp_tfm(tfm));
 926 }
 927
 928 static inline int crypto_has_comp(const char *alg_name, u32 type, u32 mask)
 929 {
 930         type &= ~CRYPTO_ALG_TYPE_MASK;
 931         type |= CRYPTO_ALG_TYPE_COMPRESS;
 932         mask |= CRYPTO_ALG_TYPE_MASK;
 933
 934         return crypto_has_alg(alg_name, type, mask);
 935 }
 936
 937 static inline const char *crypto_comp_name(struct crypto_comp *tfm)
 938 {
 939         return crypto_tfm_alg_name(crypto_comp_tfm(tfm));
 940 }
 941
 942 static inline struct compress_tfm *crypto_comp_crt(struct crypto_comp *tfm)
 943 {
 944         return &crypto_comp_tfm(tfm)->crt_compress;
 945 }
 946
 947 static inline int crypto_comp_compress(struct crypto_comp *tfm,
 948                                        const u8 *src, unsigned int slen,
 949                                        u8 *dst, unsigned int *dlen)
 950 {
 951         return crypto_comp_crt(tfm)->cot_compress(tfm, src, slen, dst, dlen);
 952 }
 953
 954 static inline int crypto_comp_decompress(struct crypto_comp *tfm,
 955                                          const u8 *src, unsigned int slen,
 956                                          u8 *dst, unsigned int *dlen)
 957 {
 958         return crypto_comp_crt(tfm)->cot_decompress(tfm, src, slen, dst, dlen);
 959 }
 960
 961 #endif  /* _LINUX_CRYPTO_H */
 962