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