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