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 ahash_mcryptd_update(struct ahash_request *desc);
 118 int ahash_mcryptd_final(struct ahash_request *desc);
 119 int ahash_mcryptd_finup(struct ahash_request *desc);
 120 int ahash_mcryptd_digest(struct ahash_request *desc);
 121
 122 int crypto_init_shash_ops_async(struct crypto_tfm *tfm);
 123
 124 static inline void *crypto_ahash_ctx(struct crypto_ahash *tfm)
 125 {
 126         return crypto_tfm_ctx(crypto_ahash_tfm(tfm));
 127 }
 128
 129 static inline struct ahash_alg *__crypto_ahash_alg(struct crypto_alg *alg)
 130 {
 131         return container_of(__crypto_hash_alg_common(alg), struct ahash_alg,
 132                             halg);
 133 }
 134
 135 static inline void crypto_ahash_set_reqsize(struct crypto_ahash *tfm,
 136                                             unsigned int reqsize)
 137 {
 138         tfm->reqsize = reqsize;
 139 }
 140
 141 static inline struct crypto_instance *ahash_crypto_instance(
 142         struct ahash_instance *inst)
 143 {
 144         return container_of(&inst->alg.halg.base, struct crypto_instance, alg);
 145 }
 146
 147 static inline struct ahash_instance *ahash_instance(
 148         struct crypto_instance *inst)
 149 {
 150         return container_of(&inst->alg, struct ahash_instance, alg.halg.base);
 151 }
 152
 153 static inline void *ahash_instance_ctx(struct ahash_instance *inst)
 154 {
 155         return crypto_instance_ctx(ahash_crypto_instance(inst));
 156 }
 157
 158 static inline unsigned int ahash_instance_headroom(void)
 159 {
 160         return sizeof(struct ahash_alg) - sizeof(struct crypto_alg);
 161 }
 162
 163 static inline struct ahash_instance *ahash_alloc_instance(
 164         const char *name, struct crypto_alg *alg)
 165 {
 166         return crypto_alloc_instance2(name, alg, ahash_instance_headroom());
 167 }
 168
 169 static inline struct crypto_ahash *crypto_spawn_ahash(
 170         struct crypto_ahash_spawn *spawn)
 171 {
 172         return crypto_spawn_tfm2(&spawn->base);
 173 }
 174
 175 static inline int ahash_enqueue_request(struct crypto_queue *queue,
 176                                              struct ahash_request *request)
 177 {
 178         return crypto_enqueue_request(queue, &request->base);
 179 }
 180
 181 static inline struct ahash_request *ahash_dequeue_request(
 182         struct crypto_queue *queue)
 183 {
 184         return ahash_request_cast(crypto_dequeue_request(queue));
 185 }
 186
 187 static inline int ahash_tfm_in_queue(struct crypto_queue *queue,
 188                                           struct crypto_ahash *tfm)
 189 {
 190         return crypto_tfm_in_queue(queue, crypto_ahash_tfm(tfm));
 191 }
 192
 193 static inline void *crypto_shash_ctx(struct crypto_shash *tfm)
 194 {
 195         return crypto_tfm_ctx(&tfm->base);
 196 }
 197
 198 static inline struct crypto_instance *shash_crypto_instance(
 199         struct shash_instance *inst)
 200 {
 201         return container_of(&inst->alg.base, struct crypto_instance, alg);
 202 }
 203
 204 static inline struct shash_instance *shash_instance(
 205         struct crypto_instance *inst)
 206 {
 207         return container_of(__crypto_shash_alg(&inst->alg),
 208                             struct shash_instance, alg);
 209 }
 210
 211 static inline void *shash_instance_ctx(struct shash_instance *inst)
 212 {
 213         return crypto_instance_ctx(shash_crypto_instance(inst));
 214 }
 215
 216 static inline struct shash_instance *shash_alloc_instance(
 217         const char *name, struct crypto_alg *alg)
 218 {
 219         return crypto_alloc_instance2(name, alg,
 220                                       sizeof(struct shash_alg) - sizeof(*alg));
 221 }
 222
 223 static inline struct crypto_shash *crypto_spawn_shash(
 224         struct crypto_shash_spawn *spawn)
 225 {
 226         return crypto_spawn_tfm2(&spawn->base);
 227 }
 228
 229 static inline void *crypto_shash_ctx_aligned(struct crypto_shash *tfm)
 230 {
 231         return crypto_tfm_ctx_aligned(&tfm->base);
 232 }
 233
 234 static inline struct crypto_shash *__crypto_shash_cast(struct crypto_tfm *tfm)
 235 {
 236         return container_of(tfm, struct crypto_shash, base);
 237 }
 238
 239 #endif  /* _CRYPTO_INTERNAL_HASH_H */
 240