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   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 int crypto_has_alg(const char *name, u32 type, u32 mask);
 240 #else
 241 static inline int crypto_alg_available(const char *name, u32 flags)
 242 {
 243         return 0;
 244 }
 245
 246 static inline int crypto_has_alg(const char *name, u32 type, u32 mask)
 247 {
 248         return 0;
 249 }
 250 #endif
 251
 252 /*
 253  * Transforms: user-instantiated objects which encapsulate algorithms
 254  * and core processing logic.  Managed via crypto_alloc_*() and
 255  * crypto_free_*(), as well as the various helpers below.
 256  */
 257
 258 struct blkcipher_tfm {
 259         void *iv;
 260         int (*setkey)(struct crypto_tfm *tfm, const u8 *key,
 261                       unsigned int keylen);
 262         int (*encrypt)(struct blkcipher_desc *desc, struct scatterlist *dst,
 263                        struct scatterlist *src, unsigned int nbytes);
 264         int (*decrypt)(struct blkcipher_desc *desc, struct scatterlist *dst,
 265                        struct scatterlist *src, unsigned int nbytes);
 266 };
 267
 268 struct cipher_tfm {
 269         void *cit_iv;
 270         unsigned int cit_ivsize;
 271         u32 cit_mode;
 272         int (*cit_setkey)(struct crypto_tfm *tfm,
 273                           const u8 *key, unsigned int keylen);
 274         int (*cit_encrypt)(struct crypto_tfm *tfm,
 275                            struct scatterlist *dst,
 276                            struct scatterlist *src,
 277                            unsigned int nbytes);
 278         int (*cit_encrypt_iv)(struct crypto_tfm *tfm,
 279                               struct scatterlist *dst,
 280                               struct scatterlist *src,
 281                               unsigned int nbytes, u8 *iv);
 282         int (*cit_decrypt)(struct crypto_tfm *tfm,
 283                            struct scatterlist *dst,
 284                            struct scatterlist *src,
 285                            unsigned int nbytes);
 286         int (*cit_decrypt_iv)(struct crypto_tfm *tfm,
 287                            struct scatterlist *dst,
 288                            struct scatterlist *src,
 289                            unsigned int nbytes, u8 *iv);
 290         void (*cit_xor_block)(u8 *dst, const u8 *src);
 291         void (*cit_encrypt_one)(struct crypto_tfm *tfm, u8 *dst, const u8 *src);
 292         void (*cit_decrypt_one)(struct crypto_tfm *tfm, u8 *dst, const u8 *src);
 293 };
 294
 295 struct hash_tfm {
 296         int (*init)(struct hash_desc *desc);
 297         int (*update)(struct hash_desc *desc,
 298                       struct scatterlist *sg, unsigned int nsg);
 299         int (*final)(struct hash_desc *desc, u8 *out);
 300         int (*digest)(struct hash_desc *desc, struct scatterlist *sg,
 301                       unsigned int nsg, u8 *out);
 302         int (*setkey)(struct crypto_hash *tfm, const u8 *key,
 303                       unsigned int keylen);
 304         unsigned int digestsize;
 305 };
 306
 307 struct compress_tfm {
 308         int (*cot_compress)(struct crypto_tfm *tfm,
 309                             const u8 *src, unsigned int slen,
 310                             u8 *dst, unsigned int *dlen);
 311         int (*cot_decompress)(struct crypto_tfm *tfm,
 312                               const u8 *src, unsigned int slen,
 313                               u8 *dst, unsigned int *dlen);
 314 };
 315
 316 #define crt_blkcipher   crt_u.blkcipher
 317 #define crt_cipher      crt_u.cipher
 318 #define crt_hash        crt_u.hash
 319 #define crt_compress    crt_u.compress
 320
 321 struct crypto_tfm {
 322
 323         u32 crt_flags;
 324
 325         union {
 326                 struct blkcipher_tfm blkcipher;
 327                 struct cipher_tfm cipher;
 328                 struct hash_tfm hash;
 329                 struct compress_tfm compress;
 330         } crt_u;
 331
 332         struct crypto_alg *__crt_alg;
 333
 334         void *__crt_ctx[] CRYPTO_MINALIGN_ATTR;
 335 };
 336
 337 #define crypto_cipher crypto_tfm
 338 #define crypto_comp crypto_tfm
 339
 340 struct crypto_blkcipher {
 341         struct crypto_tfm base;
 342 };
 343
 344 struct crypto_hash {
 345         struct crypto_tfm base;
 346 };
 347
 348 enum {
 349         CRYPTOA_UNSPEC,
 350         CRYPTOA_ALG,
 351 };
 352
 353 struct crypto_attr_alg {
 354         char name[CRYPTO_MAX_ALG_NAME];
 355 };
 356
 357 /*
 358  * Transform user interface.
 359  */
 360
 361 struct crypto_tfm *crypto_alloc_tfm(const char *alg_name, u32 tfm_flags);
 362 struct crypto_tfm *crypto_alloc_base(const char *alg_name, u32 type, u32 mask);
 363 void crypto_free_tfm(struct crypto_tfm *tfm);
 364
 365 /*
 366  * Transform helpers which query the underlying algorithm.
 367  */
 368 static inline const char *crypto_tfm_alg_name(struct crypto_tfm *tfm)
 369 {
 370         return tfm->__crt_alg->cra_name;
 371 }
 372
 373 static inline const char *crypto_tfm_alg_driver_name(struct crypto_tfm *tfm)
 374 {
 375         return tfm->__crt_alg->cra_driver_name;
 376 }
 377
 378 static inline int crypto_tfm_alg_priority(struct crypto_tfm *tfm)
 379 {
 380         return tfm->__crt_alg->cra_priority;
 381 }
 382
 383 static inline const char *crypto_tfm_alg_modname(struct crypto_tfm *tfm)
 384 {
 385         return module_name(tfm->__crt_alg->cra_module);
 386 }
 387
 388 static inline u32 crypto_tfm_alg_type(struct crypto_tfm *tfm)
 389 {
 390         return tfm->__crt_alg->cra_flags & CRYPTO_ALG_TYPE_MASK;
 391 }
 392
 393 static unsigned int crypto_tfm_alg_min_keysize(struct crypto_tfm *tfm)
 394         __deprecated;
 395 static inline unsigned int crypto_tfm_alg_min_keysize(struct crypto_tfm *tfm)
 396 {
 397         BUG_ON(crypto_tfm_alg_type(tfm) != CRYPTO_ALG_TYPE_CIPHER);
 398         return tfm->__crt_alg->cra_cipher.cia_min_keysize;
 399 }
 400
 401 static unsigned int crypto_tfm_alg_max_keysize(struct crypto_tfm *tfm)
 402         __deprecated;
 403 static inline unsigned int crypto_tfm_alg_max_keysize(struct crypto_tfm *tfm)
 404 {
 405         BUG_ON(crypto_tfm_alg_type(tfm) != CRYPTO_ALG_TYPE_CIPHER);
 406         return tfm->__crt_alg->cra_cipher.cia_max_keysize;
 407 }
 408
 409 static unsigned int crypto_tfm_alg_ivsize(struct crypto_tfm *tfm) __deprecated;
 410 static inline unsigned int crypto_tfm_alg_ivsize(struct crypto_tfm *tfm)
 411 {
 412         BUG_ON(crypto_tfm_alg_type(tfm) != CRYPTO_ALG_TYPE_CIPHER);
 413         return tfm->crt_cipher.cit_ivsize;
 414 }
 415
 416 static inline unsigned int crypto_tfm_alg_blocksize(struct crypto_tfm *tfm)
 417 {
 418         return tfm->__crt_alg->cra_blocksize;
 419 }
 420
 421 static inline unsigned int crypto_tfm_alg_digestsize(struct crypto_tfm *tfm)
 422 {
 423         BUG_ON(crypto_tfm_alg_type(tfm) != CRYPTO_ALG_TYPE_DIGEST);
 424         return tfm->__crt_alg->cra_digest.dia_digestsize;
 425 }
 426
 427 static inline unsigned int crypto_tfm_alg_alignmask(struct crypto_tfm *tfm)
 428 {
 429         return tfm->__crt_alg->cra_alignmask;
 430 }
 431
 432 static inline u32 crypto_tfm_get_flags(struct crypto_tfm *tfm)
 433 {
 434         return tfm->crt_flags;
 435 }
 436
 437 static inline void crypto_tfm_set_flags(struct crypto_tfm *tfm, u32 flags)
 438 {
 439         tfm->crt_flags |= flags;
 440 }
 441
 442 static inline void crypto_tfm_clear_flags(struct crypto_tfm *tfm, u32 flags)
 443 {
 444         tfm->crt_flags &= ~flags;
 445 }
 446
 447 static inline void *crypto_tfm_ctx(struct crypto_tfm *tfm)
 448 {
 449         return tfm->__crt_ctx;
 450 }
 451
 452 static inline unsigned int crypto_tfm_ctx_alignment(void)
 453 {
 454         struct crypto_tfm *tfm;
 455         return __alignof__(tfm->__crt_ctx);
 456 }
 457
 458 /*
 459  * API wrappers.
 460  */
 461 static inline struct crypto_blkcipher *__crypto_blkcipher_cast(
 462         struct crypto_tfm *tfm)
 463 {
 464         return (struct crypto_blkcipher *)tfm;
 465 }
 466
 467 static inline struct crypto_blkcipher *crypto_blkcipher_cast(
 468         struct crypto_tfm *tfm)
 469 {
 470         BUG_ON(crypto_tfm_alg_type(tfm) != CRYPTO_ALG_TYPE_BLKCIPHER);
 471         return __crypto_blkcipher_cast(tfm);
 472 }
 473
 474 static inline struct crypto_blkcipher *crypto_alloc_blkcipher(
 475         const char *alg_name, u32 type, u32 mask)
 476 {
 477         type &= ~CRYPTO_ALG_TYPE_MASK;
 478         type |= CRYPTO_ALG_TYPE_BLKCIPHER;
 479         mask |= CRYPTO_ALG_TYPE_MASK;
 480
 481         return __crypto_blkcipher_cast(crypto_alloc_base(alg_name, type, mask));
 482 }
 483
 484 static inline struct crypto_tfm *crypto_blkcipher_tfm(
 485         struct crypto_blkcipher *tfm)
 486 {
 487         return &tfm->base;
 488 }
 489
 490 static inline void crypto_free_blkcipher(struct crypto_blkcipher *tfm)
 491 {
 492         crypto_free_tfm(crypto_blkcipher_tfm(tfm));
 493 }
 494
 495 static inline int crypto_has_blkcipher(const char *alg_name, u32 type, u32 mask)
 496 {
 497         type &= ~CRYPTO_ALG_TYPE_MASK;
 498         type |= CRYPTO_ALG_TYPE_BLKCIPHER;
 499         mask |= CRYPTO_ALG_TYPE_MASK;
 500
 501         return crypto_has_alg(alg_name, type, mask);
 502 }
 503
 504 static inline const char *crypto_blkcipher_name(struct crypto_blkcipher *tfm)
 505 {
 506         return crypto_tfm_alg_name(crypto_blkcipher_tfm(tfm));
 507 }
 508
 509 static inline struct blkcipher_tfm *crypto_blkcipher_crt(
 510         struct crypto_blkcipher *tfm)
 511 {
 512         return &crypto_blkcipher_tfm(tfm)->crt_blkcipher;
 513 }
 514
 515 static inline struct blkcipher_alg *crypto_blkcipher_alg(
 516         struct crypto_blkcipher *tfm)
 517 {
 518         return &crypto_blkcipher_tfm(tfm)->__crt_alg->cra_blkcipher;
 519 }
 520
 521 static inline unsigned int crypto_blkcipher_ivsize(struct crypto_blkcipher *tfm)
 522 {
 523         return crypto_blkcipher_alg(tfm)->ivsize;
 524 }
 525
 526 static inline unsigned int crypto_blkcipher_blocksize(
 527         struct crypto_blkcipher *tfm)
 528 {
 529         return crypto_tfm_alg_blocksize(crypto_blkcipher_tfm(tfm));
 530 }
 531
 532 static inline unsigned int crypto_blkcipher_alignmask(
 533         struct crypto_blkcipher *tfm)
 534 {
 535         return crypto_tfm_alg_alignmask(crypto_blkcipher_tfm(tfm));
 536 }
 537
 538 static inline u32 crypto_blkcipher_get_flags(struct crypto_blkcipher *tfm)
 539 {
 540         return crypto_tfm_get_flags(crypto_blkcipher_tfm(tfm));
 541 }
 542
 543 static inline void crypto_blkcipher_set_flags(struct crypto_blkcipher *tfm,
 544                                               u32 flags)
 545 {
 546         crypto_tfm_set_flags(crypto_blkcipher_tfm(tfm), flags);
 547 }
 548
 549 static inline void crypto_blkcipher_clear_flags(struct crypto_blkcipher *tfm,
 550                                                 u32 flags)
 551 {
 552         crypto_tfm_clear_flags(crypto_blkcipher_tfm(tfm), flags);
 553 }
 554
 555 static inline int crypto_blkcipher_setkey(struct crypto_blkcipher *tfm,
 556                                           const u8 *key, unsigned int keylen)
 557 {
 558         return crypto_blkcipher_crt(tfm)->setkey(crypto_blkcipher_tfm(tfm),
 559                                                  key, keylen);
 560 }
 561
 562 static inline int crypto_blkcipher_encrypt(struct blkcipher_desc *desc,
 563                                            struct scatterlist *dst,
 564                                            struct scatterlist *src,
 565                                            unsigned int nbytes)
 566 {
 567         desc->info = crypto_blkcipher_crt(desc->tfm)->iv;
 568         return crypto_blkcipher_crt(desc->tfm)->encrypt(desc, dst, src, nbytes);
 569 }
 570
 571 static inline int crypto_blkcipher_encrypt_iv(struct blkcipher_desc *desc,
 572                                               struct scatterlist *dst,
 573                                               struct scatterlist *src,
 574                                               unsigned int nbytes)
 575 {
 576         return crypto_blkcipher_crt(desc->tfm)->encrypt(desc, dst, src, nbytes);
 577 }
 578
 579 static inline int crypto_blkcipher_decrypt(struct blkcipher_desc *desc,
 580                                            struct scatterlist *dst,
 581                                            struct scatterlist *src,
 582                                            unsigned int nbytes)
 583 {
 584         desc->info = crypto_blkcipher_crt(desc->tfm)->iv;
 585         return crypto_blkcipher_crt(desc->tfm)->decrypt(desc, dst, src, nbytes);
 586 }
 587
 588 static inline int crypto_blkcipher_decrypt_iv(struct blkcipher_desc *desc,
 589                                               struct scatterlist *dst,
 590                                               struct scatterlist *src,
 591                                               unsigned int nbytes)
 592 {
 593         return crypto_blkcipher_crt(desc->tfm)->decrypt(desc, dst, src, nbytes);
 594 }
 595
 596 static inline void crypto_blkcipher_set_iv(struct crypto_blkcipher *tfm,
 597                                            const u8 *src, unsigned int len)
 598 {
 599         memcpy(crypto_blkcipher_crt(tfm)->iv, src, len);
 600 }
 601
 602 static inline void crypto_blkcipher_get_iv(struct crypto_blkcipher *tfm,
 603                                            u8 *dst, unsigned int len)
 604 {
 605         memcpy(dst, crypto_blkcipher_crt(tfm)->iv, len);
 606 }
 607
 608 static inline struct crypto_cipher *__crypto_cipher_cast(struct crypto_tfm *tfm)
 609 {
 610         return (struct crypto_cipher *)tfm;
 611 }
 612
 613 static inline struct crypto_cipher *crypto_cipher_cast(struct crypto_tfm *tfm)
 614 {
 615         BUG_ON(crypto_tfm_alg_type(tfm) != CRYPTO_ALG_TYPE_CIPHER);
 616         return __crypto_cipher_cast(tfm);
 617 }
 618
 619 static inline struct crypto_cipher *crypto_alloc_cipher(const char *alg_name,
 620                                                         u32 type, u32 mask)
 621 {
 622         type &= ~CRYPTO_ALG_TYPE_MASK;
 623         type |= CRYPTO_ALG_TYPE_CIPHER;
 624         mask |= CRYPTO_ALG_TYPE_MASK;
 625
 626         return __crypto_cipher_cast(crypto_alloc_base(alg_name, type, mask));
 627 }
 628
 629 static inline struct crypto_tfm *crypto_cipher_tfm(struct crypto_cipher *tfm)
 630 {
 631         return tfm;
 632 }
 633
 634 static inline void crypto_free_cipher(struct crypto_cipher *tfm)
 635 {
 636         crypto_free_tfm(crypto_cipher_tfm(tfm));
 637 }
 638
 639 static inline int crypto_has_cipher(const char *alg_name, u32 type, u32 mask)
 640 {
 641         type &= ~CRYPTO_ALG_TYPE_MASK;
 642         type |= CRYPTO_ALG_TYPE_CIPHER;
 643         mask |= CRYPTO_ALG_TYPE_MASK;
 644
 645         return crypto_has_alg(alg_name, type, mask);
 646 }
 647
 648 static inline struct cipher_tfm *crypto_cipher_crt(struct crypto_cipher *tfm)
 649 {
 650         return &crypto_cipher_tfm(tfm)->crt_cipher;
 651 }
 652
 653 static inline unsigned int crypto_cipher_blocksize(struct crypto_cipher *tfm)
 654 {
 655         return crypto_tfm_alg_blocksize(crypto_cipher_tfm(tfm));
 656 }
 657
 658 static inline unsigned int crypto_cipher_alignmask(struct crypto_cipher *tfm)
 659 {
 660         return crypto_tfm_alg_alignmask(crypto_cipher_tfm(tfm));
 661 }
 662
 663 static inline u32 crypto_cipher_get_flags(struct crypto_cipher *tfm)
 664 {
 665         return crypto_tfm_get_flags(crypto_cipher_tfm(tfm));
 666 }
 667
 668 static inline void crypto_cipher_set_flags(struct crypto_cipher *tfm,
 669                                            u32 flags)
 670 {
 671         crypto_tfm_set_flags(crypto_cipher_tfm(tfm), flags);
 672 }
 673
 674 static inline void crypto_cipher_clear_flags(struct crypto_cipher *tfm,
 675                                              u32 flags)
 676 {
 677         crypto_tfm_clear_flags(crypto_cipher_tfm(tfm), flags);
 678 }
 679
 680 static inline int crypto_cipher_setkey(struct crypto_cipher *tfm,
 681                                        const u8 *key, unsigned int keylen)
 682 {
 683         return crypto_cipher_crt(tfm)->cit_setkey(crypto_cipher_tfm(tfm),
 684                                                   key, keylen);
 685 }
 686
 687 static inline void crypto_cipher_encrypt_one(struct crypto_cipher *tfm,
 688                                              u8 *dst, const u8 *src)
 689 {
 690         crypto_cipher_crt(tfm)->cit_encrypt_one(crypto_cipher_tfm(tfm),
 691                                                 dst, src);
 692 }
 693
 694 static inline void crypto_cipher_decrypt_one(struct crypto_cipher *tfm,
 695                                              u8 *dst, const u8 *src)
 696 {
 697         crypto_cipher_crt(tfm)->cit_decrypt_one(crypto_cipher_tfm(tfm),
 698                                                 dst, src);
 699 }
 700
 701 void crypto_digest_init(struct crypto_tfm *tfm);
 702 void crypto_digest_update(struct crypto_tfm *tfm,
 703                           struct scatterlist *sg, unsigned int nsg);
 704 void crypto_digest_final(struct crypto_tfm *tfm, u8 *out);
 705 void crypto_digest_digest(struct crypto_tfm *tfm,
 706                           struct scatterlist *sg, unsigned int nsg, u8 *out);
 707
 708 static inline struct crypto_hash *__crypto_hash_cast(struct crypto_tfm *tfm)
 709 {
 710         return (struct crypto_hash *)tfm;
 711 }
 712
 713 static inline struct crypto_hash *crypto_hash_cast(struct crypto_tfm *tfm)
 714 {
 715         BUG_ON((crypto_tfm_alg_type(tfm) ^ CRYPTO_ALG_TYPE_HASH) &
 716                CRYPTO_ALG_TYPE_HASH_MASK);
 717         return __crypto_hash_cast(tfm);
 718 }
 719
 720 static inline int crypto_digest_setkey(struct crypto_tfm *tfm,
 721                                        const u8 *key, unsigned int keylen)
 722 {
 723         return tfm->crt_hash.setkey(crypto_hash_cast(tfm), key, keylen);
 724 }
 725
 726 static inline struct crypto_hash *crypto_alloc_hash(const char *alg_name,
 727                                                     u32 type, u32 mask)
 728 {
 729         type &= ~CRYPTO_ALG_TYPE_MASK;
 730         type |= CRYPTO_ALG_TYPE_HASH;
 731         mask |= CRYPTO_ALG_TYPE_HASH_MASK;
 732
 733         return __crypto_hash_cast(crypto_alloc_base(alg_name, type, mask));
 734 }
 735
 736 static inline struct crypto_tfm *crypto_hash_tfm(struct crypto_hash *tfm)
 737 {
 738         return &tfm->base;
 739 }
 740
 741 static inline void crypto_free_hash(struct crypto_hash *tfm)
 742 {
 743         crypto_free_tfm(crypto_hash_tfm(tfm));
 744 }
 745
 746 static inline int crypto_has_hash(const char *alg_name, u32 type, u32 mask)
 747 {
 748         type &= ~CRYPTO_ALG_TYPE_MASK;
 749         type |= CRYPTO_ALG_TYPE_HASH;
 750         mask |= CRYPTO_ALG_TYPE_HASH_MASK;
 751
 752         return crypto_has_alg(alg_name, type, mask);
 753 }
 754
 755 static inline struct hash_tfm *crypto_hash_crt(struct crypto_hash *tfm)
 756 {
 757         return &crypto_hash_tfm(tfm)->crt_hash;
 758 }
 759
 760 static inline unsigned int crypto_hash_blocksize(struct crypto_hash *tfm)
 761 {
 762         return crypto_tfm_alg_blocksize(crypto_hash_tfm(tfm));
 763 }
 764
 765 static inline unsigned int crypto_hash_alignmask(struct crypto_hash *tfm)
 766 {
 767         return crypto_tfm_alg_alignmask(crypto_hash_tfm(tfm));
 768 }
 769
 770 static inline unsigned int crypto_hash_digestsize(struct crypto_hash *tfm)
 771 {
 772         return crypto_hash_crt(tfm)->digestsize;
 773 }
 774
 775 static inline u32 crypto_hash_get_flags(struct crypto_hash *tfm)
 776 {
 777         return crypto_tfm_get_flags(crypto_hash_tfm(tfm));
 778 }
 779
 780 static inline void crypto_hash_set_flags(struct crypto_hash *tfm, u32 flags)
 781 {
 782         crypto_tfm_set_flags(crypto_hash_tfm(tfm), flags);
 783 }
 784
 785 static inline void crypto_hash_clear_flags(struct crypto_hash *tfm, u32 flags)
 786 {
 787         crypto_tfm_clear_flags(crypto_hash_tfm(tfm), flags);
 788 }
 789
 790 static inline int crypto_hash_init(struct hash_desc *desc)
 791 {
 792         return crypto_hash_crt(desc->tfm)->init(desc);
 793 }
 794
 795 static inline int crypto_hash_update(struct hash_desc *desc,
 796                                      struct scatterlist *sg,
 797                                      unsigned int nbytes)
 798 {
 799         return crypto_hash_crt(desc->tfm)->update(desc, sg, nbytes);
 800 }
 801
 802 static inline int crypto_hash_final(struct hash_desc *desc, u8 *out)
 803 {
 804         return crypto_hash_crt(desc->tfm)->final(desc, out);
 805 }
 806
 807 static inline int crypto_hash_digest(struct hash_desc *desc,
 808                                      struct scatterlist *sg,
 809                                      unsigned int nbytes, u8 *out)
 810 {
 811         return crypto_hash_crt(desc->tfm)->digest(desc, sg, nbytes, out);
 812 }
 813
 814 static inline int crypto_hash_setkey(struct crypto_hash *hash,
 815                                      const u8 *key, unsigned int keylen)
 816 {
 817         return crypto_hash_crt(hash)->setkey(hash, key, keylen);
 818 }
 819
 820 static int crypto_cipher_encrypt(struct crypto_tfm *tfm,
 821                                  struct scatterlist *dst,
 822                                  struct scatterlist *src,
 823                                  unsigned int nbytes) __deprecated;
 824 static inline int crypto_cipher_encrypt(struct crypto_tfm *tfm,
 825                                         struct scatterlist *dst,
 826                                         struct scatterlist *src,
 827                                         unsigned int nbytes)
 828 {
 829         BUG_ON(crypto_tfm_alg_type(tfm) != CRYPTO_ALG_TYPE_CIPHER);
 830         return tfm->crt_cipher.cit_encrypt(tfm, dst, src, nbytes);
 831 }
 832
 833 static int crypto_cipher_encrypt_iv(struct crypto_tfm *tfm,
 834                                     struct scatterlist *dst,
 835                                     struct scatterlist *src,
 836                                     unsigned int nbytes, u8 *iv) __deprecated;
 837 static inline int crypto_cipher_encrypt_iv(struct crypto_tfm *tfm,
 838                                            struct scatterlist *dst,
 839                                            struct scatterlist *src,
 840                                            unsigned int nbytes, u8 *iv)
 841 {
 842         BUG_ON(crypto_tfm_alg_type(tfm) != CRYPTO_ALG_TYPE_CIPHER);
 843         return tfm->crt_cipher.cit_encrypt_iv(tfm, dst, src, nbytes, iv);
 844 }
 845
 846 static int crypto_cipher_decrypt(struct crypto_tfm *tfm,
 847                                  struct scatterlist *dst,
 848                                  struct scatterlist *src,
 849                                  unsigned int nbytes) __deprecated;
 850 static inline int crypto_cipher_decrypt(struct crypto_tfm *tfm,
 851                                         struct scatterlist *dst,
 852                                         struct scatterlist *src,
 853                                         unsigned int nbytes)
 854 {
 855         BUG_ON(crypto_tfm_alg_type(tfm) != CRYPTO_ALG_TYPE_CIPHER);
 856         return tfm->crt_cipher.cit_decrypt(tfm, dst, src, nbytes);
 857 }
 858
 859 static int crypto_cipher_decrypt_iv(struct crypto_tfm *tfm,
 860                                     struct scatterlist *dst,
 861                                     struct scatterlist *src,
 862                                     unsigned int nbytes, u8 *iv) __deprecated;
 863 static inline int crypto_cipher_decrypt_iv(struct crypto_tfm *tfm,
 864                                            struct scatterlist *dst,
 865                                            struct scatterlist *src,
 866                                            unsigned int nbytes, u8 *iv)
 867 {
 868         BUG_ON(crypto_tfm_alg_type(tfm) != CRYPTO_ALG_TYPE_CIPHER);
 869         return tfm->crt_cipher.cit_decrypt_iv(tfm, dst, src, nbytes, iv);
 870 }
 871
 872 static void crypto_cipher_set_iv(struct crypto_tfm *tfm,
 873                                  const u8 *src, unsigned int len) __deprecated;
 874 static inline void crypto_cipher_set_iv(struct crypto_tfm *tfm,
 875                                         const u8 *src, unsigned int len)
 876 {
 877         BUG_ON(crypto_tfm_alg_type(tfm) != CRYPTO_ALG_TYPE_CIPHER);
 878         memcpy(tfm->crt_cipher.cit_iv, src, len);
 879 }
 880
 881 static void crypto_cipher_get_iv(struct crypto_tfm *tfm,
 882                                  u8 *dst, unsigned int len) __deprecated;
 883 static inline void crypto_cipher_get_iv(struct crypto_tfm *tfm,
 884                                         u8 *dst, unsigned int len)
 885 {
 886         BUG_ON(crypto_tfm_alg_type(tfm) != CRYPTO_ALG_TYPE_CIPHER);
 887         memcpy(dst, tfm->crt_cipher.cit_iv, len);
 888 }
 889
 890 static inline struct crypto_comp *__crypto_comp_cast(struct crypto_tfm *tfm)
 891 {
 892         return (struct crypto_comp *)tfm;
 893 }
 894
 895 static inline struct crypto_comp *crypto_comp_cast(struct crypto_tfm *tfm)
 896 {
 897         BUG_ON((crypto_tfm_alg_type(tfm) ^ CRYPTO_ALG_TYPE_COMPRESS) &
 898                CRYPTO_ALG_TYPE_MASK);
 899         return __crypto_comp_cast(tfm);
 900 }
 901
 902 static inline struct crypto_comp *crypto_alloc_comp(const char *alg_name,
 903                                                     u32 type, u32 mask)
 904 {
 905         type &= ~CRYPTO_ALG_TYPE_MASK;
 906         type |= CRYPTO_ALG_TYPE_COMPRESS;
 907         mask |= CRYPTO_ALG_TYPE_MASK;
 908
 909         return __crypto_comp_cast(crypto_alloc_base(alg_name, type, mask));
 910 }
 911
 912 static inline struct crypto_tfm *crypto_comp_tfm(struct crypto_comp *tfm)
 913 {
 914         return tfm;
 915 }
 916
 917 static inline void crypto_free_comp(struct crypto_comp *tfm)
 918 {
 919         crypto_free_tfm(crypto_comp_tfm(tfm));
 920 }
 921
 922 static inline int crypto_has_comp(const char *alg_name, u32 type, u32 mask)
 923 {
 924         type &= ~CRYPTO_ALG_TYPE_MASK;
 925         type |= CRYPTO_ALG_TYPE_COMPRESS;
 926         mask |= CRYPTO_ALG_TYPE_MASK;
 927
 928         return crypto_has_alg(alg_name, type, mask);
 929 }
 930
 931 static inline const char *crypto_comp_name(struct crypto_comp *tfm)
 932 {
 933         return crypto_tfm_alg_name(crypto_comp_tfm(tfm));
 934 }
 935
 936 static inline struct compress_tfm *crypto_comp_crt(struct crypto_comp *tfm)
 937 {
 938         return &crypto_comp_tfm(tfm)->crt_compress;
 939 }
 940
 941 static inline int crypto_comp_compress(struct crypto_comp *tfm,
 942                                        const u8 *src, unsigned int slen,
 943                                        u8 *dst, unsigned int *dlen)
 944 {
 945         return crypto_comp_crt(tfm)->cot_compress(tfm, src, slen, dst, dlen);
 946 }
 947
 948 static inline int crypto_comp_decompress(struct crypto_comp *tfm,
 949                                          const u8 *src, unsigned int slen,
 950                                          u8 *dst, unsigned int *dlen)
 951 {
 952         return crypto_comp_crt(tfm)->cot_decompress(tfm, src, slen, dst, dlen);
 953 }
 954
 955 #endif  /* _LINUX_CRYPTO_H */
 956