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_BLKCIPHER       0x00000003
  35 #define CRYPTO_ALG_TYPE_COMPRESS        0x00000004
  36
  37 #define CRYPTO_ALG_LARVAL               0x00000010
  38 #define CRYPTO_ALG_DEAD                 0x00000020
  39 #define CRYPTO_ALG_DYING                0x00000040
  40 #define CRYPTO_ALG_ASYNC                0x00000080
  41
  42 /*
  43  * Transform masks and values (for crt_flags).
  44  */
  45 #define CRYPTO_TFM_MODE_MASK            0x000000ff
  46 #define CRYPTO_TFM_REQ_MASK             0x000fff00
  47 #define CRYPTO_TFM_RES_MASK             0xfff00000
  48
  49 #define CRYPTO_TFM_MODE_ECB             0x00000001
  50 #define CRYPTO_TFM_MODE_CBC             0x00000002
  51 #define CRYPTO_TFM_MODE_CFB             0x00000004
  52 #define CRYPTO_TFM_MODE_CTR             0x00000008
  53
  54 #define CRYPTO_TFM_REQ_WEAK_KEY         0x00000100
  55 #define CRYPTO_TFM_REQ_MAY_SLEEP        0x00000200
  56 #define CRYPTO_TFM_RES_WEAK_KEY         0x00100000
  57 #define CRYPTO_TFM_RES_BAD_KEY_LEN      0x00200000
  58 #define CRYPTO_TFM_RES_BAD_KEY_SCHED    0x00400000
  59 #define CRYPTO_TFM_RES_BAD_BLOCK_LEN    0x00800000
  60 #define CRYPTO_TFM_RES_BAD_FLAGS        0x01000000
  61
  62 /*
  63  * Miscellaneous stuff.
  64  */
  65 #define CRYPTO_UNSPEC                   0
  66 #define CRYPTO_MAX_ALG_NAME             64
  67
  68 #define CRYPTO_DIR_ENCRYPT              1
  69 #define CRYPTO_DIR_DECRYPT              0
  70
  71 /*
  72  * The macro CRYPTO_MINALIGN_ATTR (along with the void * type in the actual
  73  * declaration) is used to ensure that the crypto_tfm context structure is
  74  * aligned correctly for the given architecture so that there are no alignment
  75  * faults for C data types.  In particular, this is required on platforms such
  76  * as arm where pointers are 32-bit aligned but there are data types such as
  77  * u64 which require 64-bit alignment.
  78  */
  79 #if defined(ARCH_KMALLOC_MINALIGN)
  80 #define CRYPTO_MINALIGN ARCH_KMALLOC_MINALIGN
  81 #elif defined(ARCH_SLAB_MINALIGN)
  82 #define CRYPTO_MINALIGN ARCH_SLAB_MINALIGN
  83 #endif
  84
  85 #ifdef CRYPTO_MINALIGN
  86 #define CRYPTO_MINALIGN_ATTR __attribute__ ((__aligned__(CRYPTO_MINALIGN)))
  87 #else
  88 #define CRYPTO_MINALIGN_ATTR
  89 #endif
  90
  91 struct scatterlist;
  92 struct crypto_blkcipher;
  93 struct crypto_tfm;
  94 struct crypto_type;
  95
  96 struct blkcipher_desc {
  97         struct crypto_blkcipher *tfm;
  98         void *info;
  99         u32 flags;
 100 };
 101
 102 struct cipher_desc {
 103         struct crypto_tfm *tfm;
 104         void (*crfn)(struct crypto_tfm *tfm, u8 *dst, const u8 *src);
 105         unsigned int (*prfn)(const struct cipher_desc *desc, u8 *dst,
 106                              const u8 *src, unsigned int nbytes);
 107         void *info;
 108 };
 109
 110 /*
 111  * Algorithms: modular crypto algorithm implementations, managed
 112  * via crypto_register_alg() and crypto_unregister_alg().
 113  */
 114 struct blkcipher_alg {
 115         int (*setkey)(struct crypto_tfm *tfm, const u8 *key,
 116                       unsigned int keylen);
 117         int (*encrypt)(struct blkcipher_desc *desc,
 118                        struct scatterlist *dst, struct scatterlist *src,
 119                        unsigned int nbytes);
 120         int (*decrypt)(struct blkcipher_desc *desc,
 121                        struct scatterlist *dst, struct scatterlist *src,
 122                        unsigned int nbytes);
 123
 124         unsigned int min_keysize;
 125         unsigned int max_keysize;
 126         unsigned int ivsize;
 127 };
 128
 129 struct cipher_alg {
 130         unsigned int cia_min_keysize;
 131         unsigned int cia_max_keysize;
 132         int (*cia_setkey)(struct crypto_tfm *tfm, const u8 *key,
 133                           unsigned int keylen);
 134         void (*cia_encrypt)(struct crypto_tfm *tfm, u8 *dst, const u8 *src);
 135         void (*cia_decrypt)(struct crypto_tfm *tfm, u8 *dst, const u8 *src);
 136
 137         unsigned int (*cia_encrypt_ecb)(const struct cipher_desc *desc,
 138                                         u8 *dst, const u8 *src,
 139                                         unsigned int nbytes) __deprecated;
 140         unsigned int (*cia_decrypt_ecb)(const struct cipher_desc *desc,
 141                                         u8 *dst, const u8 *src,
 142                                         unsigned int nbytes) __deprecated;
 143         unsigned int (*cia_encrypt_cbc)(const struct cipher_desc *desc,
 144                                         u8 *dst, const u8 *src,
 145                                         unsigned int nbytes) __deprecated;
 146         unsigned int (*cia_decrypt_cbc)(const struct cipher_desc *desc,
 147                                         u8 *dst, const u8 *src,
 148                                         unsigned int nbytes) __deprecated;
 149 };
 150
 151 struct digest_alg {
 152         unsigned int dia_digestsize;
 153         void (*dia_init)(struct crypto_tfm *tfm);
 154         void (*dia_update)(struct crypto_tfm *tfm, const u8 *data,
 155                            unsigned int len);
 156         void (*dia_final)(struct crypto_tfm *tfm, u8 *out);
 157         int (*dia_setkey)(struct crypto_tfm *tfm, const u8 *key,
 158                           unsigned int keylen);
 159 };
 160
 161 struct compress_alg {
 162         int (*coa_compress)(struct crypto_tfm *tfm, const u8 *src,
 163                             unsigned int slen, u8 *dst, unsigned int *dlen);
 164         int (*coa_decompress)(struct crypto_tfm *tfm, const u8 *src,
 165                               unsigned int slen, u8 *dst, unsigned int *dlen);
 166 };
 167
 168 #define cra_blkcipher   cra_u.blkcipher
 169 #define cra_cipher      cra_u.cipher
 170 #define cra_digest      cra_u.digest
 171 #define cra_compress    cra_u.compress
 172
 173 struct crypto_alg {
 174         struct list_head cra_list;
 175         struct list_head cra_users;
 176
 177         u32 cra_flags;
 178         unsigned int cra_blocksize;
 179         unsigned int cra_ctxsize;
 180         unsigned int cra_alignmask;
 181
 182         int cra_priority;
 183         atomic_t cra_refcnt;
 184
 185         char cra_name[CRYPTO_MAX_ALG_NAME];
 186         char cra_driver_name[CRYPTO_MAX_ALG_NAME];
 187
 188         const struct crypto_type *cra_type;
 189
 190         union {
 191                 struct blkcipher_alg blkcipher;
 192                 struct cipher_alg cipher;
 193                 struct digest_alg digest;
 194                 struct compress_alg compress;
 195         } cra_u;
 196
 197         int (*cra_init)(struct crypto_tfm *tfm);
 198         void (*cra_exit)(struct crypto_tfm *tfm);
 199         void (*cra_destroy)(struct crypto_alg *alg);
 200
 201         struct module *cra_module;
 202 };
 203
 204 /*
 205  * Algorithm registration interface.
 206  */
 207 int crypto_register_alg(struct crypto_alg *alg);
 208 int crypto_unregister_alg(struct crypto_alg *alg);
 209
 210 /*
 211  * Algorithm query interface.
 212  */
 213 #ifdef CONFIG_CRYPTO
 214 int crypto_alg_available(const char *name, u32 flags);
 215 #else
 216 static inline int crypto_alg_available(const char *name, u32 flags)
 217 {
 218         return 0;
 219 }
 220 #endif
 221
 222 /*
 223  * Transforms: user-instantiated objects which encapsulate algorithms
 224  * and core processing logic.  Managed via crypto_alloc_*() and
 225  * crypto_free_*(), as well as the various helpers below.
 226  */
 227
 228 struct blkcipher_tfm {
 229         void *iv;
 230         int (*setkey)(struct crypto_tfm *tfm, const u8 *key,
 231                       unsigned int keylen);
 232         int (*encrypt)(struct blkcipher_desc *desc, struct scatterlist *dst,
 233                        struct scatterlist *src, unsigned int nbytes);
 234         int (*decrypt)(struct blkcipher_desc *desc, struct scatterlist *dst,
 235                        struct scatterlist *src, unsigned int nbytes);
 236 };
 237
 238 struct cipher_tfm {
 239         void *cit_iv;
 240         unsigned int cit_ivsize;
 241         u32 cit_mode;
 242         int (*cit_setkey)(struct crypto_tfm *tfm,
 243                           const u8 *key, unsigned int keylen);
 244         int (*cit_encrypt)(struct crypto_tfm *tfm,
 245                            struct scatterlist *dst,
 246                            struct scatterlist *src,
 247                            unsigned int nbytes);
 248         int (*cit_encrypt_iv)(struct crypto_tfm *tfm,
 249                               struct scatterlist *dst,
 250                               struct scatterlist *src,
 251                               unsigned int nbytes, u8 *iv);
 252         int (*cit_decrypt)(struct crypto_tfm *tfm,
 253                            struct scatterlist *dst,
 254                            struct scatterlist *src,
 255                            unsigned int nbytes);
 256         int (*cit_decrypt_iv)(struct crypto_tfm *tfm,
 257                            struct scatterlist *dst,
 258                            struct scatterlist *src,
 259                            unsigned int nbytes, u8 *iv);
 260         void (*cit_xor_block)(u8 *dst, const u8 *src);
 261         void (*cit_encrypt_one)(struct crypto_tfm *tfm, u8 *dst, const u8 *src);
 262         void (*cit_decrypt_one)(struct crypto_tfm *tfm, u8 *dst, const u8 *src);
 263 };
 264
 265 struct digest_tfm {
 266         void (*dit_init)(struct crypto_tfm *tfm);
 267         void (*dit_update)(struct crypto_tfm *tfm,
 268                            struct scatterlist *sg, unsigned int nsg);
 269         void (*dit_final)(struct crypto_tfm *tfm, u8 *out);
 270         void (*dit_digest)(struct crypto_tfm *tfm, struct scatterlist *sg,
 271                            unsigned int nsg, u8 *out);
 272         int (*dit_setkey)(struct crypto_tfm *tfm,
 273                           const u8 *key, unsigned int keylen);
 274 #ifdef CONFIG_CRYPTO_HMAC
 275         void *dit_hmac_block;
 276 #endif
 277 };
 278
 279 struct compress_tfm {
 280         int (*cot_compress)(struct crypto_tfm *tfm,
 281                             const u8 *src, unsigned int slen,
 282                             u8 *dst, unsigned int *dlen);
 283         int (*cot_decompress)(struct crypto_tfm *tfm,
 284                               const u8 *src, unsigned int slen,
 285                               u8 *dst, unsigned int *dlen);
 286 };
 287
 288 #define crt_blkcipher   crt_u.blkcipher
 289 #define crt_cipher      crt_u.cipher
 290 #define crt_digest      crt_u.digest
 291 #define crt_compress    crt_u.compress
 292
 293 struct crypto_tfm {
 294
 295         u32 crt_flags;
 296
 297         union {
 298                 struct blkcipher_tfm blkcipher;
 299                 struct cipher_tfm cipher;
 300                 struct digest_tfm digest;
 301                 struct compress_tfm compress;
 302         } crt_u;
 303
 304         struct crypto_alg *__crt_alg;
 305
 306         void *__crt_ctx[] CRYPTO_MINALIGN_ATTR;
 307 };
 308
 309 #define crypto_cipher crypto_tfm
 310
 311 struct crypto_blkcipher {
 312         struct crypto_tfm base;
 313 };
 314
 315 enum {
 316         CRYPTOA_UNSPEC,
 317         CRYPTOA_ALG,
 318 };
 319
 320 struct crypto_attr_alg {
 321         char name[CRYPTO_MAX_ALG_NAME];
 322 };
 323
 324 /*
 325  * Transform user interface.
 326  */
 327
 328 struct crypto_tfm *crypto_alloc_tfm(const char *alg_name, u32 tfm_flags);
 329 struct crypto_tfm *crypto_alloc_base(const char *alg_name, u32 type, u32 mask);
 330 void crypto_free_tfm(struct crypto_tfm *tfm);
 331
 332 /*
 333  * Transform helpers which query the underlying algorithm.
 334  */
 335 static inline const char *crypto_tfm_alg_name(struct crypto_tfm *tfm)
 336 {
 337         return tfm->__crt_alg->cra_name;
 338 }
 339
 340 static inline const char *crypto_tfm_alg_driver_name(struct crypto_tfm *tfm)
 341 {
 342         return tfm->__crt_alg->cra_driver_name;
 343 }
 344
 345 static inline int crypto_tfm_alg_priority(struct crypto_tfm *tfm)
 346 {
 347         return tfm->__crt_alg->cra_priority;
 348 }
 349
 350 static inline const char *crypto_tfm_alg_modname(struct crypto_tfm *tfm)
 351 {
 352         return module_name(tfm->__crt_alg->cra_module);
 353 }
 354
 355 static inline u32 crypto_tfm_alg_type(struct crypto_tfm *tfm)
 356 {
 357         return tfm->__crt_alg->cra_flags & CRYPTO_ALG_TYPE_MASK;
 358 }
 359
 360 static unsigned int crypto_tfm_alg_min_keysize(struct crypto_tfm *tfm)
 361         __deprecated;
 362 static inline unsigned int crypto_tfm_alg_min_keysize(struct crypto_tfm *tfm)
 363 {
 364         BUG_ON(crypto_tfm_alg_type(tfm) != CRYPTO_ALG_TYPE_CIPHER);
 365         return tfm->__crt_alg->cra_cipher.cia_min_keysize;
 366 }
 367
 368 static unsigned int crypto_tfm_alg_max_keysize(struct crypto_tfm *tfm)
 369         __deprecated;
 370 static inline unsigned int crypto_tfm_alg_max_keysize(struct crypto_tfm *tfm)
 371 {
 372         BUG_ON(crypto_tfm_alg_type(tfm) != CRYPTO_ALG_TYPE_CIPHER);
 373         return tfm->__crt_alg->cra_cipher.cia_max_keysize;
 374 }
 375
 376 static unsigned int crypto_tfm_alg_ivsize(struct crypto_tfm *tfm) __deprecated;
 377 static inline unsigned int crypto_tfm_alg_ivsize(struct crypto_tfm *tfm)
 378 {
 379         BUG_ON(crypto_tfm_alg_type(tfm) != CRYPTO_ALG_TYPE_CIPHER);
 380         return tfm->crt_cipher.cit_ivsize;
 381 }
 382
 383 static inline unsigned int crypto_tfm_alg_blocksize(struct crypto_tfm *tfm)
 384 {
 385         return tfm->__crt_alg->cra_blocksize;
 386 }
 387
 388 static inline unsigned int crypto_tfm_alg_digestsize(struct crypto_tfm *tfm)
 389 {
 390         BUG_ON(crypto_tfm_alg_type(tfm) != CRYPTO_ALG_TYPE_DIGEST);
 391         return tfm->__crt_alg->cra_digest.dia_digestsize;
 392 }
 393
 394 static inline unsigned int crypto_tfm_alg_alignmask(struct crypto_tfm *tfm)
 395 {
 396         return tfm->__crt_alg->cra_alignmask;
 397 }
 398
 399 static inline u32 crypto_tfm_get_flags(struct crypto_tfm *tfm)
 400 {
 401         return tfm->crt_flags;
 402 }
 403
 404 static inline void crypto_tfm_set_flags(struct crypto_tfm *tfm, u32 flags)
 405 {
 406         tfm->crt_flags |= flags;
 407 }
 408
 409 static inline void crypto_tfm_clear_flags(struct crypto_tfm *tfm, u32 flags)
 410 {
 411         tfm->crt_flags &= ~flags;
 412 }
 413
 414 static inline void *crypto_tfm_ctx(struct crypto_tfm *tfm)
 415 {
 416         return tfm->__crt_ctx;
 417 }
 418
 419 static inline unsigned int crypto_tfm_ctx_alignment(void)
 420 {
 421         struct crypto_tfm *tfm;
 422         return __alignof__(tfm->__crt_ctx);
 423 }
 424
 425 /*
 426  * API wrappers.
 427  */
 428 static inline struct crypto_blkcipher *__crypto_blkcipher_cast(
 429         struct crypto_tfm *tfm)
 430 {
 431         return (struct crypto_blkcipher *)tfm;
 432 }
 433
 434 static inline struct crypto_blkcipher *crypto_blkcipher_cast(
 435         struct crypto_tfm *tfm)
 436 {
 437         BUG_ON(crypto_tfm_alg_type(tfm) != CRYPTO_ALG_TYPE_BLKCIPHER);
 438         return __crypto_blkcipher_cast(tfm);
 439 }
 440
 441 static inline struct crypto_blkcipher *crypto_alloc_blkcipher(
 442         const char *alg_name, u32 type, u32 mask)
 443 {
 444         type &= ~CRYPTO_ALG_TYPE_MASK;
 445         type |= CRYPTO_ALG_TYPE_BLKCIPHER;
 446         mask |= CRYPTO_ALG_TYPE_MASK;
 447
 448         return __crypto_blkcipher_cast(crypto_alloc_base(alg_name, type, mask));
 449 }
 450
 451 static inline struct crypto_tfm *crypto_blkcipher_tfm(
 452         struct crypto_blkcipher *tfm)
 453 {
 454         return &tfm->base;
 455 }
 456
 457 static inline void crypto_free_blkcipher(struct crypto_blkcipher *tfm)
 458 {
 459         crypto_free_tfm(crypto_blkcipher_tfm(tfm));
 460 }
 461
 462 static inline const char *crypto_blkcipher_name(struct crypto_blkcipher *tfm)
 463 {
 464         return crypto_tfm_alg_name(crypto_blkcipher_tfm(tfm));
 465 }
 466
 467 static inline struct blkcipher_tfm *crypto_blkcipher_crt(
 468         struct crypto_blkcipher *tfm)
 469 {
 470         return &crypto_blkcipher_tfm(tfm)->crt_blkcipher;
 471 }
 472
 473 static inline struct blkcipher_alg *crypto_blkcipher_alg(
 474         struct crypto_blkcipher *tfm)
 475 {
 476         return &crypto_blkcipher_tfm(tfm)->__crt_alg->cra_blkcipher;
 477 }
 478
 479 static inline unsigned int crypto_blkcipher_ivsize(struct crypto_blkcipher *tfm)
 480 {
 481         return crypto_blkcipher_alg(tfm)->ivsize;
 482 }
 483
 484 static inline unsigned int crypto_blkcipher_blocksize(
 485         struct crypto_blkcipher *tfm)
 486 {
 487         return crypto_tfm_alg_blocksize(crypto_blkcipher_tfm(tfm));
 488 }
 489
 490 static inline unsigned int crypto_blkcipher_alignmask(
 491         struct crypto_blkcipher *tfm)
 492 {
 493         return crypto_tfm_alg_alignmask(crypto_blkcipher_tfm(tfm));
 494 }
 495
 496 static inline u32 crypto_blkcipher_get_flags(struct crypto_blkcipher *tfm)
 497 {
 498         return crypto_tfm_get_flags(crypto_blkcipher_tfm(tfm));
 499 }
 500
 501 static inline void crypto_blkcipher_set_flags(struct crypto_blkcipher *tfm,
 502                                               u32 flags)
 503 {
 504         crypto_tfm_set_flags(crypto_blkcipher_tfm(tfm), flags);
 505 }
 506
 507 static inline void crypto_blkcipher_clear_flags(struct crypto_blkcipher *tfm,
 508                                                 u32 flags)
 509 {
 510         crypto_tfm_clear_flags(crypto_blkcipher_tfm(tfm), flags);
 511 }
 512
 513 static inline int crypto_blkcipher_setkey(struct crypto_blkcipher *tfm,
 514                                           const u8 *key, unsigned int keylen)
 515 {
 516         return crypto_blkcipher_crt(tfm)->setkey(crypto_blkcipher_tfm(tfm),
 517                                                  key, keylen);
 518 }
 519
 520 static inline int crypto_blkcipher_encrypt(struct blkcipher_desc *desc,
 521                                            struct scatterlist *dst,
 522                                            struct scatterlist *src,
 523                                            unsigned int nbytes)
 524 {
 525         desc->info = crypto_blkcipher_crt(desc->tfm)->iv;
 526         return crypto_blkcipher_crt(desc->tfm)->encrypt(desc, dst, src, nbytes);
 527 }
 528
 529 static inline int crypto_blkcipher_encrypt_iv(struct blkcipher_desc *desc,
 530                                               struct scatterlist *dst,
 531                                               struct scatterlist *src,
 532                                               unsigned int nbytes)
 533 {
 534         return crypto_blkcipher_crt(desc->tfm)->encrypt(desc, dst, src, nbytes);
 535 }
 536
 537 static inline int crypto_blkcipher_decrypt(struct blkcipher_desc *desc,
 538                                            struct scatterlist *dst,
 539                                            struct scatterlist *src,
 540                                            unsigned int nbytes)
 541 {
 542         desc->info = crypto_blkcipher_crt(desc->tfm)->iv;
 543         return crypto_blkcipher_crt(desc->tfm)->decrypt(desc, dst, src, nbytes);
 544 }
 545
 546 static inline int crypto_blkcipher_decrypt_iv(struct blkcipher_desc *desc,
 547                                               struct scatterlist *dst,
 548                                               struct scatterlist *src,
 549                                               unsigned int nbytes)
 550 {
 551         return crypto_blkcipher_crt(desc->tfm)->decrypt(desc, dst, src, nbytes);
 552 }
 553
 554 static inline void crypto_blkcipher_set_iv(struct crypto_blkcipher *tfm,
 555                                            const u8 *src, unsigned int len)
 556 {
 557         memcpy(crypto_blkcipher_crt(tfm)->iv, src, len);
 558 }
 559
 560 static inline void crypto_blkcipher_get_iv(struct crypto_blkcipher *tfm,
 561                                            u8 *dst, unsigned int len)
 562 {
 563         memcpy(dst, crypto_blkcipher_crt(tfm)->iv, len);
 564 }
 565
 566 static inline struct crypto_cipher *__crypto_cipher_cast(struct crypto_tfm *tfm)
 567 {
 568         return (struct crypto_cipher *)tfm;
 569 }
 570
 571 static inline struct crypto_cipher *crypto_cipher_cast(struct crypto_tfm *tfm)
 572 {
 573         BUG_ON(crypto_tfm_alg_type(tfm) != CRYPTO_ALG_TYPE_CIPHER);
 574         return __crypto_cipher_cast(tfm);
 575 }
 576
 577 static inline struct crypto_cipher *crypto_alloc_cipher(const char *alg_name,
 578                                                         u32 type, u32 mask)
 579 {
 580         type &= ~CRYPTO_ALG_TYPE_MASK;
 581         type |= CRYPTO_ALG_TYPE_CIPHER;
 582         mask |= CRYPTO_ALG_TYPE_MASK;
 583
 584         return __crypto_cipher_cast(crypto_alloc_base(alg_name, type, mask));
 585 }
 586
 587 static inline struct crypto_tfm *crypto_cipher_tfm(struct crypto_cipher *tfm)
 588 {
 589         return tfm;
 590 }
 591
 592 static inline void crypto_free_cipher(struct crypto_cipher *tfm)
 593 {
 594         crypto_free_tfm(crypto_cipher_tfm(tfm));
 595 }
 596
 597 static inline struct cipher_tfm *crypto_cipher_crt(struct crypto_cipher *tfm)
 598 {
 599         return &crypto_cipher_tfm(tfm)->crt_cipher;
 600 }
 601
 602 static inline unsigned int crypto_cipher_blocksize(struct crypto_cipher *tfm)
 603 {
 604         return crypto_tfm_alg_blocksize(crypto_cipher_tfm(tfm));
 605 }
 606
 607 static inline unsigned int crypto_cipher_alignmask(struct crypto_cipher *tfm)
 608 {
 609         return crypto_tfm_alg_alignmask(crypto_cipher_tfm(tfm));
 610 }
 611
 612 static inline u32 crypto_cipher_get_flags(struct crypto_cipher *tfm)
 613 {
 614         return crypto_tfm_get_flags(crypto_cipher_tfm(tfm));
 615 }
 616
 617 static inline void crypto_cipher_set_flags(struct crypto_cipher *tfm,
 618                                            u32 flags)
 619 {
 620         crypto_tfm_set_flags(crypto_cipher_tfm(tfm), flags);
 621 }
 622
 623 static inline void crypto_cipher_clear_flags(struct crypto_cipher *tfm,
 624                                              u32 flags)
 625 {
 626         crypto_tfm_clear_flags(crypto_cipher_tfm(tfm), flags);
 627 }
 628
 629 static inline int crypto_cipher_setkey(struct crypto_cipher *tfm,
 630                                        const u8 *key, unsigned int keylen)
 631 {
 632         return crypto_cipher_crt(tfm)->cit_setkey(crypto_cipher_tfm(tfm),
 633                                                   key, keylen);
 634 }
 635
 636 static inline void crypto_cipher_encrypt_one(struct crypto_cipher *tfm,
 637                                              u8 *dst, const u8 *src)
 638 {
 639         crypto_cipher_crt(tfm)->cit_encrypt_one(crypto_cipher_tfm(tfm),
 640                                                 dst, src);
 641 }
 642
 643 static inline void crypto_cipher_decrypt_one(struct crypto_cipher *tfm,
 644                                              u8 *dst, const u8 *src)
 645 {
 646         crypto_cipher_crt(tfm)->cit_decrypt_one(crypto_cipher_tfm(tfm),
 647                                                 dst, src);
 648 }
 649
 650 static inline void crypto_digest_init(struct crypto_tfm *tfm)
 651 {
 652         BUG_ON(crypto_tfm_alg_type(tfm) != CRYPTO_ALG_TYPE_DIGEST);
 653         tfm->crt_digest.dit_init(tfm);
 654 }
 655
 656 static inline void crypto_digest_update(struct crypto_tfm *tfm,
 657                                         struct scatterlist *sg,
 658                                         unsigned int nsg)
 659 {
 660         BUG_ON(crypto_tfm_alg_type(tfm) != CRYPTO_ALG_TYPE_DIGEST);
 661         tfm->crt_digest.dit_update(tfm, sg, nsg);
 662 }
 663
 664 static inline void crypto_digest_final(struct crypto_tfm *tfm, u8 *out)
 665 {
 666         BUG_ON(crypto_tfm_alg_type(tfm) != CRYPTO_ALG_TYPE_DIGEST);
 667         tfm->crt_digest.dit_final(tfm, out);
 668 }
 669
 670 static inline void crypto_digest_digest(struct crypto_tfm *tfm,
 671                                         struct scatterlist *sg,
 672                                         unsigned int nsg, u8 *out)
 673 {
 674         BUG_ON(crypto_tfm_alg_type(tfm) != CRYPTO_ALG_TYPE_DIGEST);
 675         tfm->crt_digest.dit_digest(tfm, sg, nsg, out);
 676 }
 677
 678 static inline int crypto_digest_setkey(struct crypto_tfm *tfm,
 679                                        const u8 *key, unsigned int keylen)
 680 {
 681         BUG_ON(crypto_tfm_alg_type(tfm) != CRYPTO_ALG_TYPE_DIGEST);
 682         return tfm->crt_digest.dit_setkey(tfm, key, keylen);
 683 }
 684
 685 static int crypto_cipher_encrypt(struct crypto_tfm *tfm,
 686                                  struct scatterlist *dst,
 687                                  struct scatterlist *src,
 688                                  unsigned int nbytes) __deprecated;
 689 static inline int crypto_cipher_encrypt(struct crypto_tfm *tfm,
 690                                         struct scatterlist *dst,
 691                                         struct scatterlist *src,
 692                                         unsigned int nbytes)
 693 {
 694         BUG_ON(crypto_tfm_alg_type(tfm) != CRYPTO_ALG_TYPE_CIPHER);
 695         return tfm->crt_cipher.cit_encrypt(tfm, dst, src, nbytes);
 696 }
 697
 698 static int crypto_cipher_encrypt_iv(struct crypto_tfm *tfm,
 699                                     struct scatterlist *dst,
 700                                     struct scatterlist *src,
 701                                     unsigned int nbytes, u8 *iv) __deprecated;
 702 static inline int crypto_cipher_encrypt_iv(struct crypto_tfm *tfm,
 703                                            struct scatterlist *dst,
 704                                            struct scatterlist *src,
 705                                            unsigned int nbytes, u8 *iv)
 706 {
 707         BUG_ON(crypto_tfm_alg_type(tfm) != CRYPTO_ALG_TYPE_CIPHER);
 708         return tfm->crt_cipher.cit_encrypt_iv(tfm, dst, src, nbytes, iv);
 709 }
 710
 711 static int crypto_cipher_decrypt(struct crypto_tfm *tfm,
 712                                  struct scatterlist *dst,
 713                                  struct scatterlist *src,
 714                                  unsigned int nbytes) __deprecated;
 715 static inline int crypto_cipher_decrypt(struct crypto_tfm *tfm,
 716                                         struct scatterlist *dst,
 717                                         struct scatterlist *src,
 718                                         unsigned int nbytes)
 719 {
 720         BUG_ON(crypto_tfm_alg_type(tfm) != CRYPTO_ALG_TYPE_CIPHER);
 721         return tfm->crt_cipher.cit_decrypt(tfm, dst, src, nbytes);
 722 }
 723
 724 static int crypto_cipher_decrypt_iv(struct crypto_tfm *tfm,
 725                                     struct scatterlist *dst,
 726                                     struct scatterlist *src,
 727                                     unsigned int nbytes, u8 *iv) __deprecated;
 728 static inline int crypto_cipher_decrypt_iv(struct crypto_tfm *tfm,
 729                                            struct scatterlist *dst,
 730                                            struct scatterlist *src,
 731                                            unsigned int nbytes, u8 *iv)
 732 {
 733         BUG_ON(crypto_tfm_alg_type(tfm) != CRYPTO_ALG_TYPE_CIPHER);
 734         return tfm->crt_cipher.cit_decrypt_iv(tfm, dst, src, nbytes, iv);
 735 }
 736
 737 static void crypto_cipher_set_iv(struct crypto_tfm *tfm,
 738                                  const u8 *src, unsigned int len) __deprecated;
 739 static inline void crypto_cipher_set_iv(struct crypto_tfm *tfm,
 740                                         const u8 *src, unsigned int len)
 741 {
 742         BUG_ON(crypto_tfm_alg_type(tfm) != CRYPTO_ALG_TYPE_CIPHER);
 743         memcpy(tfm->crt_cipher.cit_iv, src, len);
 744 }
 745
 746 static void crypto_cipher_get_iv(struct crypto_tfm *tfm,
 747                                  u8 *dst, unsigned int len) __deprecated;
 748 static inline void crypto_cipher_get_iv(struct crypto_tfm *tfm,
 749                                         u8 *dst, unsigned int len)
 750 {
 751         BUG_ON(crypto_tfm_alg_type(tfm) != CRYPTO_ALG_TYPE_CIPHER);
 752         memcpy(dst, tfm->crt_cipher.cit_iv, len);
 753 }
 754
 755 static inline int crypto_comp_compress(struct crypto_tfm *tfm,
 756                                        const u8 *src, unsigned int slen,
 757                                        u8 *dst, unsigned int *dlen)
 758 {
 759         BUG_ON(crypto_tfm_alg_type(tfm) != CRYPTO_ALG_TYPE_COMPRESS);
 760         return tfm->crt_compress.cot_compress(tfm, src, slen, dst, dlen);
 761 }
 762
 763 static inline int crypto_comp_decompress(struct crypto_tfm *tfm,
 764                                          const u8 *src, unsigned int slen,
 765                                          u8 *dst, unsigned int *dlen)
 766 {
 767         BUG_ON(crypto_tfm_alg_type(tfm) != CRYPTO_ALG_TYPE_COMPRESS);
 768         return tfm->crt_compress.cot_decompress(tfm, src, slen, dst, dlen);
 769 }
 770
 771 /*
 772  * HMAC support.
 773  */
 774 #ifdef CONFIG_CRYPTO_HMAC
 775 void crypto_hmac_init(struct crypto_tfm *tfm, u8 *key, unsigned int *keylen);
 776 void crypto_hmac_update(struct crypto_tfm *tfm,
 777                         struct scatterlist *sg, unsigned int nsg);
 778 void crypto_hmac_final(struct crypto_tfm *tfm, u8 *key,
 779                        unsigned int *keylen, u8 *out);
 780 void crypto_hmac(struct crypto_tfm *tfm, u8 *key, unsigned int *keylen,
 781                  struct scatterlist *sg, unsigned int nsg, u8 *out);
 782 #endif  /* CONFIG_CRYPTO_HMAC */
 783
 784 #endif  /* _LINUX_CRYPTO_H */
 785