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   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 struct shash_instance {
  38         struct shash_alg alg;
  39 };
  40
  41 struct crypto_shash_spawn {
  42         struct crypto_spawn base;
  43 };
  44
  45 extern const struct crypto_type crypto_ahash_type;
  46
  47 int crypto_hash_walk_done(struct crypto_hash_walk *walk, int err);
  48 int crypto_hash_walk_first(struct ahash_request *req,
  49                            struct crypto_hash_walk *walk);
  50 int crypto_hash_walk_first_compat(struct hash_desc *hdesc,
  51                                   struct crypto_hash_walk *walk,
  52                                   struct scatterlist *sg, unsigned int len);
  53
  54 int crypto_register_shash(struct shash_alg *alg);
  55 int crypto_unregister_shash(struct shash_alg *alg);
  56
  57 void shash_free_instance(struct crypto_instance *inst);
  58
  59 int crypto_init_shash_spawn(struct crypto_shash_spawn *spawn,
  60                             struct shash_alg *alg,
  61                             struct crypto_instance *inst);
  62
  63 static inline void *crypto_ahash_ctx(struct crypto_ahash *tfm)
  64 {
  65         return crypto_tfm_ctx(&tfm->base);
  66 }
  67
  68 static inline struct ahash_alg *crypto_ahash_alg(
  69         struct crypto_ahash *tfm)
  70 {
  71         return &crypto_ahash_tfm(tfm)->__crt_alg->cra_ahash;
  72 }
  73
  74 static inline int ahash_enqueue_request(struct crypto_queue *queue,
  75                                              struct ahash_request *request)
  76 {
  77         return crypto_enqueue_request(queue, &request->base);
  78 }
  79
  80 static inline struct ahash_request *ahash_dequeue_request(
  81         struct crypto_queue *queue)
  82 {
  83         return ahash_request_cast(crypto_dequeue_request(queue));
  84 }
  85
  86 static inline int ahash_tfm_in_queue(struct crypto_queue *queue,
  87                                           struct crypto_ahash *tfm)
  88 {
  89         return crypto_tfm_in_queue(queue, crypto_ahash_tfm(tfm));
  90 }
  91
  92 static inline void *crypto_shash_ctx(struct crypto_shash *tfm)
  93 {
  94         return crypto_tfm_ctx(&tfm->base);
  95 }
  96
  97 static inline struct crypto_instance *shash_crypto_instance(
  98         struct shash_instance *inst)
  99 {
 100         return container_of(&inst->alg.base, struct crypto_instance, alg);
 101 }
 102
 103 static inline struct shash_instance *shash_instance(
 104         struct crypto_instance *inst)
 105 {
 106         return container_of(__crypto_shash_alg(&inst->alg),
 107                             struct shash_instance, alg);
 108 }
 109
 110 static inline struct shash_instance *shash_alloc_instance(
 111         const char *name, struct crypto_alg *alg)
 112 {
 113         return crypto_alloc_instance2(name, alg,
 114                                       sizeof(struct shash_alg) - sizeof(*alg));
 115 }
 116
 117 static inline struct crypto_shash *crypto_spawn_shash(
 118         struct crypto_shash_spawn *spawn)
 119 {
 120         return crypto_spawn_tfm2(&spawn->base);
 121 }
 122
 123 #endif  /* _CRYPTO_INTERNAL_HASH_H */
 124