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 struct ahash_instance {
  38         struct ahash_alg alg;
  39 };
  40
  41 struct shash_instance {
  42         struct shash_alg alg;
  43 };
  44
  45 struct crypto_ahash_spawn {
  46         struct crypto_spawn base;
  47 };
  48
  49 struct crypto_shash_spawn {
  50         struct crypto_spawn base;
  51 };
  52
  53 extern const struct crypto_type crypto_ahash_type;
  54
  55 int crypto_hash_walk_done(struct crypto_hash_walk *walk, int err);
  56 int crypto_hash_walk_first(struct ahash_request *req,
  57                            struct crypto_hash_walk *walk);
  58 int crypto_hash_walk_first_compat(struct hash_desc *hdesc,
  59                                   struct crypto_hash_walk *walk,
  60                                   struct scatterlist *sg, unsigned int len);
  61
  62 int crypto_register_ahash(struct ahash_alg *alg);
  63 int crypto_unregister_ahash(struct ahash_alg *alg);
  64 int ahash_register_instance(struct crypto_template *tmpl,
  65                             struct ahash_instance *inst);
  66 void ahash_free_instance(struct crypto_instance *inst);
  67
  68 int crypto_init_ahash_spawn(struct crypto_ahash_spawn *spawn,
  69                             struct hash_alg_common *alg,
  70                             struct crypto_instance *inst);
  71
  72 struct hash_alg_common *ahash_attr_alg(struct rtattr *rta, u32 type, u32 mask);
  73
  74 int crypto_register_shash(struct shash_alg *alg);
  75 int crypto_unregister_shash(struct shash_alg *alg);
  76 int shash_register_instance(struct crypto_template *tmpl,
  77                             struct shash_instance *inst);
  78 void shash_free_instance(struct crypto_instance *inst);
  79
  80 int crypto_init_shash_spawn(struct crypto_shash_spawn *spawn,
  81                             struct shash_alg *alg,
  82                             struct crypto_instance *inst);
  83
  84 struct shash_alg *shash_attr_alg(struct rtattr *rta, u32 type, u32 mask);
  85
  86 int shash_ahash_update(struct ahash_request *req, struct shash_desc *desc);
  87 int shash_ahash_digest(struct ahash_request *req, struct shash_desc *desc);
  88
  89 int crypto_init_shash_ops_async(struct crypto_tfm *tfm);
  90
  91 static inline void *crypto_ahash_ctx(struct crypto_ahash *tfm)
  92 {
  93         return crypto_tfm_ctx(crypto_ahash_tfm(tfm));
  94 }
  95
  96 static inline struct old_ahash_alg *crypto_old_ahash_alg(
  97         struct crypto_ahash *tfm)
  98 {
  99         return &crypto_ahash_tfm(tfm)->__crt_alg->cra_ahash;
 100 }
 101
 102 static inline void crypto_ahash_set_reqsize(struct crypto_ahash *tfm,
 103                                             unsigned int reqsize)
 104 {
 105         tfm->reqsize = reqsize;
 106 }
 107
 108 static inline struct crypto_instance *ahash_crypto_instance(
 109         struct ahash_instance *inst)
 110 {
 111         return container_of(&inst->alg.halg.base, struct crypto_instance, alg);
 112 }
 113
 114 static inline struct ahash_instance *ahash_instance(
 115         struct crypto_instance *inst)
 116 {
 117         return container_of(&inst->alg, struct ahash_instance, alg.halg.base);
 118 }
 119
 120 static inline void *ahash_instance_ctx(struct ahash_instance *inst)
 121 {
 122         return crypto_instance_ctx(ahash_crypto_instance(inst));
 123 }
 124
 125 static inline unsigned int ahash_instance_headroom(void)
 126 {
 127         return sizeof(struct ahash_alg) - sizeof(struct crypto_alg);
 128 }
 129
 130 static inline struct ahash_instance *ahash_alloc_instance(
 131         const char *name, struct crypto_alg *alg)
 132 {
 133         return crypto_alloc_instance2(name, alg, ahash_instance_headroom());
 134 }
 135
 136 static inline struct crypto_ahash *crypto_spawn_ahash(
 137         struct crypto_ahash_spawn *spawn)
 138 {
 139         return crypto_spawn_tfm2(&spawn->base);
 140 }
 141
 142 static inline int ahash_enqueue_request(struct crypto_queue *queue,
 143                                              struct ahash_request *request)
 144 {
 145         return crypto_enqueue_request(queue, &request->base);
 146 }
 147
 148 static inline struct ahash_request *ahash_dequeue_request(
 149         struct crypto_queue *queue)
 150 {
 151         return ahash_request_cast(crypto_dequeue_request(queue));
 152 }
 153
 154 static inline int ahash_tfm_in_queue(struct crypto_queue *queue,
 155                                           struct crypto_ahash *tfm)
 156 {
 157         return crypto_tfm_in_queue(queue, crypto_ahash_tfm(tfm));
 158 }
 159
 160 static inline void *crypto_shash_ctx(struct crypto_shash *tfm)
 161 {
 162         return crypto_tfm_ctx(&tfm->base);
 163 }
 164
 165 static inline struct crypto_instance *shash_crypto_instance(
 166         struct shash_instance *inst)
 167 {
 168         return container_of(&inst->alg.base, struct crypto_instance, alg);
 169 }
 170
 171 static inline struct shash_instance *shash_instance(
 172         struct crypto_instance *inst)
 173 {
 174         return container_of(__crypto_shash_alg(&inst->alg),
 175                             struct shash_instance, alg);
 176 }
 177
 178 static inline void *shash_instance_ctx(struct shash_instance *inst)
 179 {
 180         return crypto_instance_ctx(shash_crypto_instance(inst));
 181 }
 182
 183 static inline struct shash_instance *shash_alloc_instance(
 184         const char *name, struct crypto_alg *alg)
 185 {
 186         return crypto_alloc_instance2(name, alg,
 187                                       sizeof(struct shash_alg) - sizeof(*alg));
 188 }
 189
 190 static inline struct crypto_shash *crypto_spawn_shash(
 191         struct crypto_shash_spawn *spawn)
 192 {
 193         return crypto_spawn_tfm2(&spawn->base);
 194 }
 195
 196 static inline void *crypto_shash_ctx_aligned(struct crypto_shash *tfm)
 197 {
 198         return crypto_tfm_ctx_aligned(&tfm->base);
 199 }
 200
 201 static inline struct crypto_shash *__crypto_shash_cast(struct crypto_tfm *tfm)
 202 {
 203         return container_of(tfm, struct crypto_shash, base);
 204 }
 205
 206 #endif  /* _CRYPTO_INTERNAL_HASH_H */
 207