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 crypto_register_ahashes(struct ahash_alg *algs, int count);
  80 void crypto_unregister_ahashes(struct ahash_alg *algs, int count);
  81 int ahash_register_instance(struct crypto_template *tmpl,
  82                             struct ahash_instance *inst);
  83 void ahash_free_instance(struct crypto_instance *inst);
  84
  85 bool crypto_shash_alg_has_setkey(struct shash_alg *alg);
  86
  87 bool crypto_hash_alg_has_setkey(struct hash_alg_common *halg);
  88
  89 int crypto_init_ahash_spawn(struct crypto_ahash_spawn *spawn,
  90                             struct hash_alg_common *alg,
  91                             struct crypto_instance *inst);
  92
  93 static inline void crypto_drop_ahash(struct crypto_ahash_spawn *spawn)
  94 {
  95         crypto_drop_spawn(&spawn->base);
  96 }
  97
  98 struct hash_alg_common *ahash_attr_alg(struct rtattr *rta, u32 type, u32 mask);
  99
 100 int crypto_register_shash(struct shash_alg *alg);
 101 int crypto_unregister_shash(struct shash_alg *alg);
 102 int crypto_register_shashes(struct shash_alg *algs, int count);
 103 int crypto_unregister_shashes(struct shash_alg *algs, int count);
 104 int shash_register_instance(struct crypto_template *tmpl,
 105                             struct shash_instance *inst);
 106 void shash_free_instance(struct crypto_instance *inst);
 107
 108 int crypto_init_shash_spawn(struct crypto_shash_spawn *spawn,
 109                             struct shash_alg *alg,
 110                             struct crypto_instance *inst);
 111
 112 static inline void crypto_drop_shash(struct crypto_shash_spawn *spawn)
 113 {
 114         crypto_drop_spawn(&spawn->base);
 115 }
 116
 117 struct shash_alg *shash_attr_alg(struct rtattr *rta, u32 type, u32 mask);
 118
 119 int shash_ahash_update(struct ahash_request *req, struct shash_desc *desc);
 120 int shash_ahash_finup(struct ahash_request *req, struct shash_desc *desc);
 121 int shash_ahash_digest(struct ahash_request *req, struct shash_desc *desc);
 122
 123 int crypto_init_shash_ops_async(struct crypto_tfm *tfm);
 124
 125 static inline void *crypto_ahash_ctx(struct crypto_ahash *tfm)
 126 {
 127         return crypto_tfm_ctx(crypto_ahash_tfm(tfm));
 128 }
 129
 130 static inline struct ahash_alg *__crypto_ahash_alg(struct crypto_alg *alg)
 131 {
 132         return container_of(__crypto_hash_alg_common(alg), struct ahash_alg,
 133                             halg);
 134 }
 135
 136 static inline void crypto_ahash_set_reqsize(struct crypto_ahash *tfm,
 137                                             unsigned int reqsize)
 138 {
 139         tfm->reqsize = reqsize;
 140 }
 141
 142 static inline struct crypto_instance *ahash_crypto_instance(
 143         struct ahash_instance *inst)
 144 {
 145         return container_of(&inst->alg.halg.base, struct crypto_instance, alg);
 146 }
 147
 148 static inline struct ahash_instance *ahash_instance(
 149         struct crypto_instance *inst)
 150 {
 151         return container_of(&inst->alg, struct ahash_instance, alg.halg.base);
 152 }
 153
 154 static inline void *ahash_instance_ctx(struct ahash_instance *inst)
 155 {
 156         return crypto_instance_ctx(ahash_crypto_instance(inst));
 157 }
 158
 159 static inline unsigned int ahash_instance_headroom(void)
 160 {
 161         return sizeof(struct ahash_alg) - sizeof(struct crypto_alg);
 162 }
 163
 164 static inline struct ahash_instance *ahash_alloc_instance(
 165         const char *name, struct crypto_alg *alg)
 166 {
 167         return crypto_alloc_instance2(name, alg, ahash_instance_headroom());
 168 }
 169
 170 static inline void ahash_request_complete(struct ahash_request *req, int err)
 171 {
 172         req->base.complete(&req->base, err);
 173 }
 174
 175 static inline u32 ahash_request_flags(struct ahash_request *req)
 176 {
 177         return req->base.flags;
 178 }
 179
 180 static inline struct crypto_ahash *crypto_spawn_ahash(
 181         struct crypto_ahash_spawn *spawn)
 182 {
 183         return crypto_spawn_tfm2(&spawn->base);
 184 }
 185
 186 static inline int ahash_enqueue_request(struct crypto_queue *queue,
 187                                              struct ahash_request *request)
 188 {
 189         return crypto_enqueue_request(queue, &request->base);
 190 }
 191
 192 static inline struct ahash_request *ahash_dequeue_request(
 193         struct crypto_queue *queue)
 194 {
 195         return ahash_request_cast(crypto_dequeue_request(queue));
 196 }
 197
 198 static inline int ahash_tfm_in_queue(struct crypto_queue *queue,
 199                                           struct crypto_ahash *tfm)
 200 {
 201         return crypto_tfm_in_queue(queue, crypto_ahash_tfm(tfm));
 202 }
 203
 204 static inline void *crypto_shash_ctx(struct crypto_shash *tfm)
 205 {
 206         return crypto_tfm_ctx(&tfm->base);
 207 }
 208
 209 static inline struct crypto_instance *shash_crypto_instance(
 210         struct shash_instance *inst)
 211 {
 212         return container_of(&inst->alg.base, struct crypto_instance, alg);
 213 }
 214
 215 static inline struct shash_instance *shash_instance(
 216         struct crypto_instance *inst)
 217 {
 218         return container_of(__crypto_shash_alg(&inst->alg),
 219                             struct shash_instance, alg);
 220 }
 221
 222 static inline void *shash_instance_ctx(struct shash_instance *inst)
 223 {
 224         return crypto_instance_ctx(shash_crypto_instance(inst));
 225 }
 226
 227 static inline struct shash_instance *shash_alloc_instance(
 228         const char *name, struct crypto_alg *alg)
 229 {
 230         return crypto_alloc_instance2(name, alg,
 231                                       sizeof(struct shash_alg) - sizeof(*alg));
 232 }
 233
 234 static inline struct crypto_shash *crypto_spawn_shash(
 235         struct crypto_shash_spawn *spawn)
 236 {
 237         return crypto_spawn_tfm2(&spawn->base);
 238 }
 239
 240 static inline void *crypto_shash_ctx_aligned(struct crypto_shash *tfm)
 241 {
 242         return crypto_tfm_ctx_aligned(&tfm->base);
 243 }
 244
 245 static inline struct crypto_shash *__crypto_shash_cast(struct crypto_tfm *tfm)
 246 {
 247         return container_of(tfm, struct crypto_shash, base);
 248 }
 249
 250 #endif  /* _CRYPTO_INTERNAL_HASH_H */
 251