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 static inline int crypto_hash_walk_last(struct crypto_hash_walk *walk)
  63 {
  64         return !(walk->entrylen | walk->total);
  65 }
  66
  67 int crypto_register_ahash(struct ahash_alg *alg);
  68 int crypto_unregister_ahash(struct ahash_alg *alg);
  69 int ahash_register_instance(struct crypto_template *tmpl,
  70                             struct ahash_instance *inst);
  71 void ahash_free_instance(struct crypto_instance *inst);
  72
  73 int crypto_init_ahash_spawn(struct crypto_ahash_spawn *spawn,
  74                             struct hash_alg_common *alg,
  75                             struct crypto_instance *inst);
  76
  77 static inline void crypto_drop_ahash(struct crypto_ahash_spawn *spawn)
  78 {
  79         crypto_drop_spawn(&spawn->base);
  80 }
  81
  82 struct hash_alg_common *ahash_attr_alg(struct rtattr *rta, u32 type, u32 mask);
  83
  84 int crypto_register_shash(struct shash_alg *alg);
  85 int crypto_unregister_shash(struct shash_alg *alg);
  86 int crypto_register_shashes(struct shash_alg *algs, int count);
  87 int crypto_unregister_shashes(struct shash_alg *algs, int count);
  88 int shash_register_instance(struct crypto_template *tmpl,
  89                             struct shash_instance *inst);
  90 void shash_free_instance(struct crypto_instance *inst);
  91
  92 int crypto_init_shash_spawn(struct crypto_shash_spawn *spawn,
  93                             struct shash_alg *alg,
  94                             struct crypto_instance *inst);
  95
  96 static inline void crypto_drop_shash(struct crypto_shash_spawn *spawn)
  97 {
  98         crypto_drop_spawn(&spawn->base);
  99 }
 100
 101 struct shash_alg *shash_attr_alg(struct rtattr *rta, u32 type, u32 mask);
 102
 103 int shash_ahash_update(struct ahash_request *req, struct shash_desc *desc);
 104 int shash_ahash_finup(struct ahash_request *req, struct shash_desc *desc);
 105 int shash_ahash_digest(struct ahash_request *req, struct shash_desc *desc);
 106
 107 int crypto_init_shash_ops_async(struct crypto_tfm *tfm);
 108
 109 static inline void *crypto_ahash_ctx(struct crypto_ahash *tfm)
 110 {
 111         return crypto_tfm_ctx(crypto_ahash_tfm(tfm));
 112 }
 113
 114 static inline struct ahash_alg *__crypto_ahash_alg(struct crypto_alg *alg)
 115 {
 116         return container_of(__crypto_hash_alg_common(alg), struct ahash_alg,
 117                             halg);
 118 }
 119
 120 static inline void crypto_ahash_set_reqsize(struct crypto_ahash *tfm,
 121                                             unsigned int reqsize)
 122 {
 123         tfm->reqsize = reqsize;
 124 }
 125
 126 static inline struct crypto_instance *ahash_crypto_instance(
 127         struct ahash_instance *inst)
 128 {
 129         return container_of(&inst->alg.halg.base, struct crypto_instance, alg);
 130 }
 131
 132 static inline struct ahash_instance *ahash_instance(
 133         struct crypto_instance *inst)
 134 {
 135         return container_of(&inst->alg, struct ahash_instance, alg.halg.base);
 136 }
 137
 138 static inline void *ahash_instance_ctx(struct ahash_instance *inst)
 139 {
 140         return crypto_instance_ctx(ahash_crypto_instance(inst));
 141 }
 142
 143 static inline unsigned int ahash_instance_headroom(void)
 144 {
 145         return sizeof(struct ahash_alg) - sizeof(struct crypto_alg);
 146 }
 147
 148 static inline struct ahash_instance *ahash_alloc_instance(
 149         const char *name, struct crypto_alg *alg)
 150 {
 151         return crypto_alloc_instance2(name, alg, ahash_instance_headroom());
 152 }
 153
 154 static inline struct crypto_ahash *crypto_spawn_ahash(
 155         struct crypto_ahash_spawn *spawn)
 156 {
 157         return crypto_spawn_tfm2(&spawn->base);
 158 }
 159
 160 static inline int ahash_enqueue_request(struct crypto_queue *queue,
 161                                              struct ahash_request *request)
 162 {
 163         return crypto_enqueue_request(queue, &request->base);
 164 }
 165
 166 static inline struct ahash_request *ahash_dequeue_request(
 167         struct crypto_queue *queue)
 168 {
 169         return ahash_request_cast(crypto_dequeue_request(queue));
 170 }
 171
 172 static inline int ahash_tfm_in_queue(struct crypto_queue *queue,
 173                                           struct crypto_ahash *tfm)
 174 {
 175         return crypto_tfm_in_queue(queue, crypto_ahash_tfm(tfm));
 176 }
 177
 178 static inline void *crypto_shash_ctx(struct crypto_shash *tfm)
 179 {
 180         return crypto_tfm_ctx(&tfm->base);
 181 }
 182
 183 static inline struct crypto_instance *shash_crypto_instance(
 184         struct shash_instance *inst)
 185 {
 186         return container_of(&inst->alg.base, struct crypto_instance, alg);
 187 }
 188
 189 static inline struct shash_instance *shash_instance(
 190         struct crypto_instance *inst)
 191 {
 192         return container_of(__crypto_shash_alg(&inst->alg),
 193                             struct shash_instance, alg);
 194 }
 195
 196 static inline void *shash_instance_ctx(struct shash_instance *inst)
 197 {
 198         return crypto_instance_ctx(shash_crypto_instance(inst));
 199 }
 200
 201 static inline struct shash_instance *shash_alloc_instance(
 202         const char *name, struct crypto_alg *alg)
 203 {
 204         return crypto_alloc_instance2(name, alg,
 205                                       sizeof(struct shash_alg) - sizeof(*alg));
 206 }
 207
 208 static inline struct crypto_shash *crypto_spawn_shash(
 209         struct crypto_shash_spawn *spawn)
 210 {
 211         return crypto_spawn_tfm2(&spawn->base);
 212 }
 213
 214 static inline void *crypto_shash_ctx_aligned(struct crypto_shash *tfm)
 215 {
 216         return crypto_tfm_ctx_aligned(&tfm->base);
 217 }
 218
 219 static inline struct crypto_shash *__crypto_shash_cast(struct crypto_tfm *tfm)
 220 {
 221         return container_of(tfm, struct crypto_shash, base);
 222 }
 223
 224 #endif  /* _CRYPTO_INTERNAL_HASH_H */
 225