linux/include/crypto/hash.h
<<
>>
Prefs
   1/*
   2 * Hash: Hash algorithms under the crypto API
   3 * 
   4 * Copyright (c) 2008 Herbert Xu <herbert@gondor.apana.org.au>
   5 *
   6 * This program is free software; you can redistribute it and/or modify it
   7 * under the terms of the GNU General Public License as published by the Free
   8 * Software Foundation; either version 2 of the License, or (at your option) 
   9 * any later version.
  10 *
  11 */
  12
  13#ifndef _CRYPTO_HASH_H
  14#define _CRYPTO_HASH_H
  15
  16#include <linux/crypto.h>
  17
  18struct crypto_ahash;
  19
  20struct hash_alg_common {
  21        unsigned int digestsize;
  22        unsigned int statesize;
  23
  24        struct crypto_alg base;
  25};
  26
  27struct ahash_request {
  28        struct crypto_async_request base;
  29
  30        unsigned int nbytes;
  31        struct scatterlist *src;
  32        u8 *result;
  33
  34        /* This field may only be used by the ahash API code. */
  35        void *priv;
  36
  37        void *__ctx[] CRYPTO_MINALIGN_ATTR;
  38};
  39
  40struct ahash_alg {
  41        int (*init)(struct ahash_request *req);
  42        int (*update)(struct ahash_request *req);
  43        int (*final)(struct ahash_request *req);
  44        int (*finup)(struct ahash_request *req);
  45        int (*digest)(struct ahash_request *req);
  46        int (*export)(struct ahash_request *req, void *out);
  47        int (*import)(struct ahash_request *req, const void *in);
  48        int (*setkey)(struct crypto_ahash *tfm, const u8 *key,
  49                      unsigned int keylen);
  50
  51        struct hash_alg_common halg;
  52};
  53
  54struct shash_desc {
  55        struct crypto_shash *tfm;
  56        u32 flags;
  57
  58        void *__ctx[] CRYPTO_MINALIGN_ATTR;
  59};
  60
  61struct shash_alg {
  62        int (*init)(struct shash_desc *desc);
  63        int (*update)(struct shash_desc *desc, const u8 *data,
  64                      unsigned int len);
  65        int (*final)(struct shash_desc *desc, u8 *out);
  66        int (*finup)(struct shash_desc *desc, const u8 *data,
  67                     unsigned int len, u8 *out);
  68        int (*digest)(struct shash_desc *desc, const u8 *data,
  69                      unsigned int len, u8 *out);
  70        int (*export)(struct shash_desc *desc, void *out);
  71        int (*import)(struct shash_desc *desc, const void *in);
  72        int (*setkey)(struct crypto_shash *tfm, const u8 *key,
  73                      unsigned int keylen);
  74
  75        unsigned int descsize;
  76
  77        /* These fields must match hash_alg_common. */
  78        unsigned int digestsize
  79                __attribute__ ((aligned(__alignof__(struct hash_alg_common))));
  80        unsigned int statesize;
  81
  82        struct crypto_alg base;
  83};
  84
  85struct crypto_ahash {
  86        int (*init)(struct ahash_request *req);
  87        int (*update)(struct ahash_request *req);
  88        int (*final)(struct ahash_request *req);
  89        int (*finup)(struct ahash_request *req);
  90        int (*digest)(struct ahash_request *req);
  91        int (*export)(struct ahash_request *req, void *out);
  92        int (*import)(struct ahash_request *req, const void *in);
  93        int (*setkey)(struct crypto_ahash *tfm, const u8 *key,
  94                      unsigned int keylen);
  95
  96        unsigned int reqsize;
  97        struct crypto_tfm base;
  98};
  99
 100struct crypto_shash {
 101        unsigned int descsize;
 102        struct crypto_tfm base;
 103};
 104
 105static inline struct crypto_ahash *__crypto_ahash_cast(struct crypto_tfm *tfm)
 106{
 107        return container_of(tfm, struct crypto_ahash, base);
 108}
 109
 110struct crypto_ahash *crypto_alloc_ahash(const char *alg_name, u32 type,
 111                                        u32 mask);
 112
 113static inline struct crypto_tfm *crypto_ahash_tfm(struct crypto_ahash *tfm)
 114{
 115        return &tfm->base;
 116}
 117
 118static inline void crypto_free_ahash(struct crypto_ahash *tfm)
 119{
 120        crypto_destroy_tfm(tfm, crypto_ahash_tfm(tfm));
 121}
 122
 123static inline unsigned int crypto_ahash_alignmask(
 124        struct crypto_ahash *tfm)
 125{
 126        return crypto_tfm_alg_alignmask(crypto_ahash_tfm(tfm));
 127}
 128
 129static inline struct hash_alg_common *__crypto_hash_alg_common(
 130        struct crypto_alg *alg)
 131{
 132        return container_of(alg, struct hash_alg_common, base);
 133}
 134
 135static inline struct hash_alg_common *crypto_hash_alg_common(
 136        struct crypto_ahash *tfm)
 137{
 138        return __crypto_hash_alg_common(crypto_ahash_tfm(tfm)->__crt_alg);
 139}
 140
 141static inline unsigned int crypto_ahash_digestsize(struct crypto_ahash *tfm)
 142{
 143        return crypto_hash_alg_common(tfm)->digestsize;
 144}
 145
 146static inline unsigned int crypto_ahash_statesize(struct crypto_ahash *tfm)
 147{
 148        return crypto_hash_alg_common(tfm)->statesize;
 149}
 150
 151static inline u32 crypto_ahash_get_flags(struct crypto_ahash *tfm)
 152{
 153        return crypto_tfm_get_flags(crypto_ahash_tfm(tfm));
 154}
 155
 156static inline void crypto_ahash_set_flags(struct crypto_ahash *tfm, u32 flags)
 157{
 158        crypto_tfm_set_flags(crypto_ahash_tfm(tfm), flags);
 159}
 160
 161static inline void crypto_ahash_clear_flags(struct crypto_ahash *tfm, u32 flags)
 162{
 163        crypto_tfm_clear_flags(crypto_ahash_tfm(tfm), flags);
 164}
 165
 166static inline struct crypto_ahash *crypto_ahash_reqtfm(
 167        struct ahash_request *req)
 168{
 169        return __crypto_ahash_cast(req->base.tfm);
 170}
 171
 172static inline unsigned int crypto_ahash_reqsize(struct crypto_ahash *tfm)
 173{
 174        return tfm->reqsize;
 175}
 176
 177static inline void *ahash_request_ctx(struct ahash_request *req)
 178{
 179        return req->__ctx;
 180}
 181
 182int crypto_ahash_setkey(struct crypto_ahash *tfm, const u8 *key,
 183                        unsigned int keylen);
 184int crypto_ahash_finup(struct ahash_request *req);
 185int crypto_ahash_final(struct ahash_request *req);
 186int crypto_ahash_digest(struct ahash_request *req);
 187
 188static inline int crypto_ahash_export(struct ahash_request *req, void *out)
 189{
 190        return crypto_ahash_reqtfm(req)->export(req, out);
 191}
 192
 193static inline int crypto_ahash_import(struct ahash_request *req, const void *in)
 194{
 195        return crypto_ahash_reqtfm(req)->import(req, in);
 196}
 197
 198static inline int crypto_ahash_init(struct ahash_request *req)
 199{
 200        return crypto_ahash_reqtfm(req)->init(req);
 201}
 202
 203static inline int crypto_ahash_update(struct ahash_request *req)
 204{
 205        return crypto_ahash_reqtfm(req)->update(req);
 206}
 207
 208static inline void ahash_request_set_tfm(struct ahash_request *req,
 209                                         struct crypto_ahash *tfm)
 210{
 211        req->base.tfm = crypto_ahash_tfm(tfm);
 212}
 213
 214static inline struct ahash_request *ahash_request_alloc(
 215        struct crypto_ahash *tfm, gfp_t gfp)
 216{
 217        struct ahash_request *req;
 218
 219        req = kmalloc(sizeof(struct ahash_request) +
 220                      crypto_ahash_reqsize(tfm), gfp);
 221
 222        if (likely(req))
 223                ahash_request_set_tfm(req, tfm);
 224
 225        return req;
 226}
 227
 228static inline void ahash_request_free(struct ahash_request *req)
 229{
 230        kzfree(req);
 231}
 232
 233static inline struct ahash_request *ahash_request_cast(
 234        struct crypto_async_request *req)
 235{
 236        return container_of(req, struct ahash_request, base);
 237}
 238
 239static inline void ahash_request_set_callback(struct ahash_request *req,
 240                                              u32 flags,
 241                                              crypto_completion_t complete,
 242                                              void *data)
 243{
 244        req->base.complete = complete;
 245        req->base.data = data;
 246        req->base.flags = flags;
 247}
 248
 249static inline void ahash_request_set_crypt(struct ahash_request *req,
 250                                           struct scatterlist *src, u8 *result,
 251                                           unsigned int nbytes)
 252{
 253        req->src = src;
 254        req->nbytes = nbytes;
 255        req->result = result;
 256}
 257
 258struct crypto_shash *crypto_alloc_shash(const char *alg_name, u32 type,
 259                                        u32 mask);
 260
 261static inline struct crypto_tfm *crypto_shash_tfm(struct crypto_shash *tfm)
 262{
 263        return &tfm->base;
 264}
 265
 266static inline void crypto_free_shash(struct crypto_shash *tfm)
 267{
 268        crypto_destroy_tfm(tfm, crypto_shash_tfm(tfm));
 269}
 270
 271static inline unsigned int crypto_shash_alignmask(
 272        struct crypto_shash *tfm)
 273{
 274        return crypto_tfm_alg_alignmask(crypto_shash_tfm(tfm));
 275}
 276
 277static inline unsigned int crypto_shash_blocksize(struct crypto_shash *tfm)
 278{
 279        return crypto_tfm_alg_blocksize(crypto_shash_tfm(tfm));
 280}
 281
 282static inline struct shash_alg *__crypto_shash_alg(struct crypto_alg *alg)
 283{
 284        return container_of(alg, struct shash_alg, base);
 285}
 286
 287static inline struct shash_alg *crypto_shash_alg(struct crypto_shash *tfm)
 288{
 289        return __crypto_shash_alg(crypto_shash_tfm(tfm)->__crt_alg);
 290}
 291
 292static inline unsigned int crypto_shash_digestsize(struct crypto_shash *tfm)
 293{
 294        return crypto_shash_alg(tfm)->digestsize;
 295}
 296
 297static inline unsigned int crypto_shash_statesize(struct crypto_shash *tfm)
 298{
 299        return crypto_shash_alg(tfm)->statesize;
 300}
 301
 302static inline u32 crypto_shash_get_flags(struct crypto_shash *tfm)
 303{
 304        return crypto_tfm_get_flags(crypto_shash_tfm(tfm));
 305}
 306
 307static inline void crypto_shash_set_flags(struct crypto_shash *tfm, u32 flags)
 308{
 309        crypto_tfm_set_flags(crypto_shash_tfm(tfm), flags);
 310}
 311
 312static inline void crypto_shash_clear_flags(struct crypto_shash *tfm, u32 flags)
 313{
 314        crypto_tfm_clear_flags(crypto_shash_tfm(tfm), flags);
 315}
 316
 317static inline unsigned int crypto_shash_descsize(struct crypto_shash *tfm)
 318{
 319        return tfm->descsize;
 320}
 321
 322static inline void *shash_desc_ctx(struct shash_desc *desc)
 323{
 324        return desc->__ctx;
 325}
 326
 327int crypto_shash_setkey(struct crypto_shash *tfm, const u8 *key,
 328                        unsigned int keylen);
 329int crypto_shash_digest(struct shash_desc *desc, const u8 *data,
 330                        unsigned int len, u8 *out);
 331
 332static inline int crypto_shash_export(struct shash_desc *desc, void *out)
 333{
 334        return crypto_shash_alg(desc->tfm)->export(desc, out);
 335}
 336
 337static inline int crypto_shash_import(struct shash_desc *desc, const void *in)
 338{
 339        return crypto_shash_alg(desc->tfm)->import(desc, in);
 340}
 341
 342static inline int crypto_shash_init(struct shash_desc *desc)
 343{
 344        return crypto_shash_alg(desc->tfm)->init(desc);
 345}
 346
 347int crypto_shash_update(struct shash_desc *desc, const u8 *data,
 348                        unsigned int len);
 349int crypto_shash_final(struct shash_desc *desc, u8 *out);
 350int crypto_shash_finup(struct shash_desc *desc, const u8 *data,
 351                       unsigned int len, u8 *out);
 352
 353#endif  /* _CRYPTO_HASH_H */
 354
lxr.linux.no kindly hosted by Redpill Linpro AS, provider of Linux consulting and operations services since 1995.