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