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
  19 struct ahash_request;
  20 struct scatterlist;
  21
  22 struct 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
  37 extern const struct crypto_type crypto_ahash_type;
  38
  39 int crypto_hash_walk_done(struct crypto_hash_walk *walk, int err);
  40 int crypto_hash_walk_first(struct ahash_request *req,
  41                            struct crypto_hash_walk *walk);
  42 int crypto_hash_walk_first_compat(struct hash_desc *hdesc,
  43                                   struct crypto_hash_walk *walk,
  44                                   struct scatterlist *sg, unsigned int len);
  45
  46 int crypto_register_shash(struct shash_alg *alg);
  47 int crypto_unregister_shash(struct shash_alg *alg);
  48
  49 static inline void *crypto_ahash_ctx(struct crypto_ahash *tfm)
  50 {
  51         return crypto_tfm_ctx(&tfm->base);
  52 }
  53
  54 static 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
  60 static 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
  66 static inline struct ahash_request *ahash_dequeue_request(
  67         struct crypto_queue *queue)
  68 {
  69         return ahash_request_cast(crypto_dequeue_request(queue));
  70 }
  71
  72 static 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
  78 static 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