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