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_ahash_walk_first(struct ahash_request *req,
  59                            struct crypto_hash_walk *walk);
  60
  61 static inline int crypto_ahash_walk_done(struct crypto_hash_walk *walk,
  62                                          int err)
  63 {
  64         return crypto_hash_walk_done(walk, err);
  65 }
  66
  67 static inline int crypto_hash_walk_last(struct crypto_hash_walk *walk)
  68 {
  69         return !(walk->entrylen | walk->total);
  70 }
  71
  72 static inline int crypto_ahash_walk_last(struct crypto_hash_walk *walk)
  73 {
  74         return crypto_hash_walk_last(walk);
  75 }
  76
  77 int crypto_register_ahash(struct ahash_alg *alg);
  78 int crypto_unregister_ahash(struct ahash_alg *alg);
  79 int ahash_register_instance(struct crypto_template *tmpl,
  80                             struct ahash_instance *inst);
  81 void ahash_free_instance(struct crypto_instance *inst);
  82
  83 int crypto_init_ahash_spawn(struct crypto_ahash_spawn *spawn,
  84                             struct hash_alg_common *alg,
  85                             struct crypto_instance *inst);
  86
  87 static inline void crypto_drop_ahash(struct crypto_ahash_spawn *spawn)
  88 {
  89         crypto_drop_spawn(&spawn->base);
  90 }
  91
  92 struct hash_alg_common *ahash_attr_alg(struct rtattr *rta, u32 type, u32 mask);
  93
  94 int crypto_register_shash(struct shash_alg *alg);
  95 int crypto_unregister_shash(struct shash_alg *alg);
  96 int crypto_register_shashes(struct shash_alg *algs, int count);
  97 int crypto_unregister_shashes(struct shash_alg *algs, int count);
  98 int shash_register_instance(struct crypto_template *tmpl,
  99                             struct shash_instance *inst);
 100 void shash_free_instance(struct crypto_instance *inst);
 101
 102 int crypto_init_shash_spawn(struct crypto_shash_spawn *spawn,
 103                             struct shash_alg *alg,
 104                             struct crypto_instance *inst);
 105
 106 static inline void crypto_drop_shash(struct crypto_shash_spawn *spawn)
 107 {
 108         crypto_drop_spawn(&spawn->base);
 109 }
 110
 111 struct shash_alg *shash_attr_alg(struct rtattr *rta, u32 type, u32 mask);
 112
 113 int shash_ahash_update(struct ahash_request *req, struct shash_desc *desc);
 114 int shash_ahash_finup(struct ahash_request *req, struct shash_desc *desc);
 115 int shash_ahash_digest(struct ahash_request *req, struct shash_desc *desc);
 116
 117 int shash_ahash_mcryptd_update(struct ahash_request *req,
 118                                struct shash_desc *desc);
 119 int shash_ahash_mcryptd_final(struct ahash_request *req,
 120                               struct shash_desc *desc);
 121 int shash_ahash_mcryptd_finup(struct ahash_request *req,
 122                               struct shash_desc *desc);
 123 int shash_ahash_mcryptd_digest(struct ahash_request *req,
 124                                struct shash_desc *desc);
 125
 126 int crypto_init_shash_ops_async(struct crypto_tfm *tfm);
 127
 128 static inline void *crypto_ahash_ctx(struct crypto_ahash *tfm)
 129 {
 130         return crypto_tfm_ctx(crypto_ahash_tfm(tfm));
 131 }
 132
 133 static inline struct ahash_alg *__crypto_ahash_alg(struct crypto_alg *alg)
 134 {
 135         return container_of(__crypto_hash_alg_common(alg), struct ahash_alg,
 136                             halg);
 137 }
 138
 139 static inline void crypto_ahash_set_reqsize(struct crypto_ahash *tfm,
 140                                             unsigned int reqsize)
 141 {
 142         tfm->reqsize = reqsize;
 143 }
 144
 145 static inline struct crypto_instance *ahash_crypto_instance(
 146         struct ahash_instance *inst)
 147 {
 148         return container_of(&inst->alg.halg.base, struct crypto_instance, alg);
 149 }
 150
 151 static inline struct ahash_instance *ahash_instance(
 152         struct crypto_instance *inst)
 153 {
 154         return container_of(&inst->alg, struct ahash_instance, alg.halg.base);
 155 }
 156
 157 static inline void *ahash_instance_ctx(struct ahash_instance *inst)
 158 {
 159         return crypto_instance_ctx(ahash_crypto_instance(inst));
 160 }
 161
 162 static inline unsigned int ahash_instance_headroom(void)
 163 {
 164         return sizeof(struct ahash_alg) - sizeof(struct crypto_alg);
 165 }
 166
 167 static inline struct ahash_instance *ahash_alloc_instance(
 168         const char *name, struct crypto_alg *alg)
 169 {
 170         return crypto_alloc_instance2(name, alg, ahash_instance_headroom());
 171 }
 172
 173 static inline struct crypto_ahash *crypto_spawn_ahash(
 174         struct crypto_ahash_spawn *spawn)
 175 {
 176         return crypto_spawn_tfm2(&spawn->base);
 177 }
 178
 179 static inline int ahash_enqueue_request(struct crypto_queue *queue,
 180                                              struct ahash_request *request)
 181 {
 182         return crypto_enqueue_request(queue, &request->base);
 183 }
 184
 185 static inline struct ahash_request *ahash_dequeue_request(
 186         struct crypto_queue *queue)
 187 {
 188         return ahash_request_cast(crypto_dequeue_request(queue));
 189 }
 190
 191 static inline int ahash_tfm_in_queue(struct crypto_queue *queue,
 192                                           struct crypto_ahash *tfm)
 193 {
 194         return crypto_tfm_in_queue(queue, crypto_ahash_tfm(tfm));
 195 }
 196
 197 static inline void *crypto_shash_ctx(struct crypto_shash *tfm)
 198 {
 199         return crypto_tfm_ctx(&tfm->base);
 200 }
 201
 202 static inline struct crypto_instance *shash_crypto_instance(
 203         struct shash_instance *inst)
 204 {
 205         return container_of(&inst->alg.base, struct crypto_instance, alg);
 206 }
 207
 208 static inline struct shash_instance *shash_instance(
 209         struct crypto_instance *inst)
 210 {
 211         return container_of(__crypto_shash_alg(&inst->alg),
 212                             struct shash_instance, alg);
 213 }
 214
 215 static inline void *shash_instance_ctx(struct shash_instance *inst)
 216 {
 217         return crypto_instance_ctx(shash_crypto_instance(inst));
 218 }
 219
 220 static inline struct shash_instance *shash_alloc_instance(
 221         const char *name, struct crypto_alg *alg)
 222 {
 223         return crypto_alloc_instance2(name, alg,
 224                                       sizeof(struct shash_alg) - sizeof(*alg));
 225 }
 226
 227 static inline struct crypto_shash *crypto_spawn_shash(
 228         struct crypto_shash_spawn *spawn)
 229 {
 230         return crypto_spawn_tfm2(&spawn->base);
 231 }
 232
 233 static inline void *crypto_shash_ctx_aligned(struct crypto_shash *tfm)
 234 {
 235         return crypto_tfm_ctx_aligned(&tfm->base);
 236 }
 237
 238 static inline struct crypto_shash *__crypto_shash_cast(struct crypto_tfm *tfm)
 239 {
 240         return container_of(tfm, struct crypto_shash, base);
 241 }
 242
 243 #endif  /* _CRYPTO_INTERNAL_HASH_H */
 244