kernel/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 shash_ahash_mcryptd_update(struct ahash_request *req,
 121                                struct shash_desc *desc);
 122 int shash_ahash_mcryptd_final(struct ahash_request *req,
 123                               struct shash_desc *desc);
 124 int shash_ahash_mcryptd_finup(struct ahash_request *req,
 125                               struct shash_desc *desc);
 126 int shash_ahash_mcryptd_digest(struct ahash_request *req,
 127                                struct shash_desc *desc);
 128
 129 int crypto_init_shash_ops_async(struct crypto_tfm *tfm);
 130
 131 static inline void *crypto_ahash_ctx(struct crypto_ahash *tfm)
 132 {
 133         return crypto_tfm_ctx(crypto_ahash_tfm(tfm));
 134 }
 135
 136 static inline struct ahash_alg *__crypto_ahash_alg(struct crypto_alg *alg)
 137 {
 138         return container_of(__crypto_hash_alg_common(alg), struct ahash_alg,
 139                             halg);
 140 }
 141
 142 static inline void crypto_ahash_set_reqsize(struct crypto_ahash *tfm,
 143                                             unsigned int reqsize)
 144 {
 145         tfm->reqsize = reqsize;
 146 }
 147
 148 static inline struct crypto_instance *ahash_crypto_instance(
 149         struct ahash_instance *inst)
 150 {
 151         return container_of(&inst->alg.halg.base, struct crypto_instance, alg);
 152 }
 153
 154 static inline struct ahash_instance *ahash_instance(
 155         struct crypto_instance *inst)
 156 {
 157         return container_of(&inst->alg, struct ahash_instance, alg.halg.base);
 158 }
 159
 160 static inline void *ahash_instance_ctx(struct ahash_instance *inst)
 161 {
 162         return crypto_instance_ctx(ahash_crypto_instance(inst));
 163 }
 164
 165 static inline unsigned int ahash_instance_headroom(void)
 166 {
 167         return sizeof(struct ahash_alg) - sizeof(struct crypto_alg);
 168 }
 169
 170 static inline struct ahash_instance *ahash_alloc_instance(
 171         const char *name, struct crypto_alg *alg)
 172 {
 173         return crypto_alloc_instance2(name, alg, ahash_instance_headroom());
 174 }
 175
 176 static inline struct crypto_ahash *crypto_spawn_ahash(
 177         struct crypto_ahash_spawn *spawn)
 178 {
 179         return crypto_spawn_tfm2(&spawn->base);
 180 }
 181
 182 static inline int ahash_enqueue_request(struct crypto_queue *queue,
 183                                              struct ahash_request *request)
 184 {
 185         return crypto_enqueue_request(queue, &request->base);
 186 }
 187
 188 static inline struct ahash_request *ahash_dequeue_request(
 189         struct crypto_queue *queue)
 190 {
 191         return ahash_request_cast(crypto_dequeue_request(queue));
 192 }
 193
 194 static inline int ahash_tfm_in_queue(struct crypto_queue *queue,
 195                                           struct crypto_ahash *tfm)
 196 {
 197         return crypto_tfm_in_queue(queue, crypto_ahash_tfm(tfm));
 198 }
 199
 200 static inline void *crypto_shash_ctx(struct crypto_shash *tfm)
 201 {
 202         return crypto_tfm_ctx(&tfm->base);
 203 }
 204
 205 static inline struct crypto_instance *shash_crypto_instance(
 206         struct shash_instance *inst)
 207 {
 208         return container_of(&inst->alg.base, struct crypto_instance, alg);
 209 }
 210
 211 static inline struct shash_instance *shash_instance(
 212         struct crypto_instance *inst)
 213 {
 214         return container_of(__crypto_shash_alg(&inst->alg),
 215                             struct shash_instance, alg);
 216 }
 217
 218 static inline void *shash_instance_ctx(struct shash_instance *inst)
 219 {
 220         return crypto_instance_ctx(shash_crypto_instance(inst));
 221 }
 222
 223 static inline struct shash_instance *shash_alloc_instance(
 224         const char *name, struct crypto_alg *alg)
 225 {
 226         return crypto_alloc_instance2(name, alg,
 227                                       sizeof(struct shash_alg) - sizeof(*alg));
 228 }
 229
 230 static inline struct crypto_shash *crypto_spawn_shash(
 231         struct crypto_shash_spawn *spawn)
 232 {
 233         return crypto_spawn_tfm2(&spawn->base);
 234 }
 235
 236 static inline void *crypto_shash_ctx_aligned(struct crypto_shash *tfm)
 237 {
 238         return crypto_tfm_ctx_aligned(&tfm->base);
 239 }
 240
 241 static inline struct crypto_shash *__crypto_shash_cast(struct crypto_tfm *tfm)
 242 {
 243         return container_of(tfm, struct crypto_shash, base);
 244 }
 245
 246 #endif  /* _CRYPTO_INTERNAL_HASH_H */
 247