LXR linux/include/crypto/internal/hash.h

   1/*
   2 * Hash algorithms.
   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_INTERNAL_HASH_H
  14#define _CRYPTO_INTERNAL_HASH_H
  15
  16#include <crypto/algapi.h>
  17#include <crypto/hash.h>
  18
  19struct ahash_request;
  20struct scatterlist;
  21
  22struct crypto_hash_walk {
  23        char *data;
  24
  25        unsigned int offset;
  26        unsigned int alignmask;
  27
  28        struct page *pg;
  29        unsigned int entrylen;
  30
  31        unsigned int total;
  32        struct scatterlist *sg;
  33
  34        unsigned int flags;
  35};
  36
  37extern const struct crypto_type crypto_ahash_type;
  38
  39int crypto_hash_walk_done(struct crypto_hash_walk *walk, int err);
  40int crypto_hash_walk_first(struct ahash_request *req,
  41                           struct crypto_hash_walk *walk);
  42int crypto_hash_walk_first_compat(struct hash_desc *hdesc,
  43                                  struct crypto_hash_walk *walk,
  44                                  struct scatterlist *sg, unsigned int len);
  45
  46int crypto_register_shash(struct shash_alg *alg);
  47int crypto_unregister_shash(struct shash_alg *alg);
  48
  49static inline void *crypto_ahash_ctx(struct crypto_ahash *tfm)
  50{
  51        return crypto_tfm_ctx(&tfm->base);
  52}
  53
  54static inline struct ahash_alg *crypto_ahash_alg(
  55        struct crypto_ahash *tfm)
  56{
  57        return &crypto_ahash_tfm(tfm)->__crt_alg->cra_ahash;
  58}
  59
  60static inline int ahash_enqueue_request(struct crypto_queue *queue,
  61                                             struct ahash_request *request)
  62{
  63        return crypto_enqueue_request(queue, &request->base);
  64}
  65
  66static inline struct ahash_request *ahash_dequeue_request(
  67        struct crypto_queue *queue)
  68{
  69        return ahash_request_cast(crypto_dequeue_request(queue));
  70}
  71
  72static inline int ahash_tfm_in_queue(struct crypto_queue *queue,
  73                                          struct crypto_ahash *tfm)
  74{
  75        return crypto_tfm_in_queue(queue, crypto_ahash_tfm(tfm));
  76}
  77
  78static inline void *crypto_shash_ctx(struct crypto_shash *tfm)
  79{
  80        return crypto_tfm_ctx(&tfm->base);
  81}
  82
  83#endif  /* _CRYPTO_INTERNAL_HASH_H */
  84
  85