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 int shash_no_setkey(struct crypto_shash *tfm, const u8 *key,
  86                     unsigned int keylen);
  87
  88 static inline bool crypto_shash_alg_has_setkey(struct shash_alg *alg)
  89 {
  90         return alg->setkey != shash_no_setkey;
  91 }
  92
  93 int crypto_init_ahash_spawn(struct crypto_ahash_spawn *spawn,
  94                             struct hash_alg_common *alg,
  95                             struct crypto_instance *inst);
  96
  97 static inline void crypto_drop_ahash(struct crypto_ahash_spawn *spawn)
  98 {
  99         crypto_drop_spawn(&spawn->base);
 100 }
 101
 102 struct hash_alg_common *ahash_attr_alg(struct rtattr *rta, u32 type, u32 mask);
 103
 104 int crypto_register_shash(struct shash_alg *alg);
 105 int crypto_unregister_shash(struct shash_alg *alg);
 106 int crypto_register_shashes(struct shash_alg *algs, int count);
 107 int crypto_unregister_shashes(struct shash_alg *algs, int count);
 108 int shash_register_instance(struct crypto_template *tmpl,
 109                             struct shash_instance *inst);
 110 void shash_free_instance(struct crypto_instance *inst);
 111
 112 int crypto_init_shash_spawn(struct crypto_shash_spawn *spawn,
 113                             struct shash_alg *alg,
 114                             struct crypto_instance *inst);
 115
 116 static inline void crypto_drop_shash(struct crypto_shash_spawn *spawn)
 117 {
 118         crypto_drop_spawn(&spawn->base);
 119 }
 120
 121 struct shash_alg *shash_attr_alg(struct rtattr *rta, u32 type, u32 mask);
 122
 123 int shash_ahash_update(struct ahash_request *req, struct shash_desc *desc);
 124 int shash_ahash_finup(struct ahash_request *req, struct shash_desc *desc);
 125 int shash_ahash_digest(struct ahash_request *req, struct shash_desc *desc);
 126
 127 int ahash_mcryptd_update(struct ahash_request *desc);
 128 int ahash_mcryptd_final(struct ahash_request *desc);
 129 int ahash_mcryptd_finup(struct ahash_request *desc);
 130 int ahash_mcryptd_digest(struct ahash_request *desc);
 131
 132 int crypto_init_shash_ops_async(struct crypto_tfm *tfm);
 133
 134 static inline void *crypto_ahash_ctx(struct crypto_ahash *tfm)
 135 {
 136         return crypto_tfm_ctx(crypto_ahash_tfm(tfm));
 137 }
 138
 139 static inline struct ahash_alg *__crypto_ahash_alg(struct crypto_alg *alg)
 140 {
 141         return container_of(__crypto_hash_alg_common(alg), struct ahash_alg,
 142                             halg);
 143 }
 144
 145 static inline void crypto_ahash_set_reqsize(struct crypto_ahash *tfm,
 146                                             unsigned int reqsize)
 147 {
 148         tfm->reqsize = reqsize;
 149 }
 150
 151 static inline struct crypto_instance *ahash_crypto_instance(
 152         struct ahash_instance *inst)
 153 {
 154         return container_of(&inst->alg.halg.base, struct crypto_instance, alg);
 155 }
 156
 157 static inline struct ahash_instance *ahash_instance(
 158         struct crypto_instance *inst)
 159 {
 160         return container_of(&inst->alg, struct ahash_instance, alg.halg.base);
 161 }
 162
 163 static inline void *ahash_instance_ctx(struct ahash_instance *inst)
 164 {
 165         return crypto_instance_ctx(ahash_crypto_instance(inst));
 166 }
 167
 168 static inline unsigned int ahash_instance_headroom(void)
 169 {
 170         return sizeof(struct ahash_alg) - sizeof(struct crypto_alg);
 171 }
 172
 173 static inline struct ahash_instance *ahash_alloc_instance(
 174         const char *name, struct crypto_alg *alg)
 175 {
 176         return crypto_alloc_instance2(name, alg, ahash_instance_headroom());
 177 }
 178
 179 static inline void ahash_request_complete(struct ahash_request *req, int err)
 180 {
 181         req->base.complete(&req->base, err);
 182 }
 183
 184 static inline u32 ahash_request_flags(struct ahash_request *req)
 185 {
 186         return req->base.flags;
 187 }
 188
 189 static inline struct crypto_ahash *crypto_spawn_ahash(
 190         struct crypto_ahash_spawn *spawn)
 191 {
 192         return crypto_spawn_tfm2(&spawn->base);
 193 }
 194
 195 static inline int ahash_enqueue_request(struct crypto_queue *queue,
 196                                              struct ahash_request *request)
 197 {
 198         return crypto_enqueue_request(queue, &request->base);
 199 }
 200
 201 static inline struct ahash_request *ahash_dequeue_request(
 202         struct crypto_queue *queue)
 203 {
 204         return ahash_request_cast(crypto_dequeue_request(queue));
 205 }
 206
 207 static inline int ahash_tfm_in_queue(struct crypto_queue *queue,
 208                                           struct crypto_ahash *tfm)
 209 {
 210         return crypto_tfm_in_queue(queue, crypto_ahash_tfm(tfm));
 211 }
 212
 213 static inline void *crypto_shash_ctx(struct crypto_shash *tfm)
 214 {
 215         return crypto_tfm_ctx(&tfm->base);
 216 }
 217
 218 static inline struct crypto_instance *shash_crypto_instance(
 219         struct shash_instance *inst)
 220 {
 221         return container_of(&inst->alg.base, struct crypto_instance, alg);
 222 }
 223
 224 static inline struct shash_instance *shash_instance(
 225         struct crypto_instance *inst)
 226 {
 227         return container_of(__crypto_shash_alg(&inst->alg),
 228                             struct shash_instance, alg);
 229 }
 230
 231 static inline void *shash_instance_ctx(struct shash_instance *inst)
 232 {
 233         return crypto_instance_ctx(shash_crypto_instance(inst));
 234 }
 235
 236 static inline struct shash_instance *shash_alloc_instance(
 237         const char *name, struct crypto_alg *alg)
 238 {
 239         return crypto_alloc_instance2(name, alg,
 240                                       sizeof(struct shash_alg) - sizeof(*alg));
 241 }
 242
 243 static inline struct crypto_shash *crypto_spawn_shash(
 244         struct crypto_shash_spawn *spawn)
 245 {
 246         return crypto_spawn_tfm2(&spawn->base);
 247 }
 248
 249 static inline void *crypto_shash_ctx_aligned(struct crypto_shash *tfm)
 250 {
 251         return crypto_tfm_ctx_aligned(&tfm->base);
 252 }
 253
 254 static inline struct crypto_shash *__crypto_shash_cast(struct crypto_tfm *tfm)
 255 {
 256         return container_of(tfm, struct crypto_shash, base);
 257 }
 258
 259 #endif  /* _CRYPTO_INTERNAL_HASH_H */
 260