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 bool crypto_hash_alg_has_setkey(struct hash_alg_common *halg);
  94
  95 int crypto_init_ahash_spawn(struct crypto_ahash_spawn *spawn,
  96                             struct hash_alg_common *alg,
  97                             struct crypto_instance *inst);
  98
  99 static inline void crypto_drop_ahash(struct crypto_ahash_spawn *spawn)
 100 {
 101         crypto_drop_spawn(&spawn->base);
 102 }
 103
 104 struct hash_alg_common *ahash_attr_alg(struct rtattr *rta, u32 type, u32 mask);
 105
 106 int crypto_register_shash(struct shash_alg *alg);
 107 int crypto_unregister_shash(struct shash_alg *alg);
 108 int crypto_register_shashes(struct shash_alg *algs, int count);
 109 int crypto_unregister_shashes(struct shash_alg *algs, int count);
 110 int shash_register_instance(struct crypto_template *tmpl,
 111                             struct shash_instance *inst);
 112 void shash_free_instance(struct crypto_instance *inst);
 113
 114 int crypto_init_shash_spawn(struct crypto_shash_spawn *spawn,
 115                             struct shash_alg *alg,
 116                             struct crypto_instance *inst);
 117
 118 static inline void crypto_drop_shash(struct crypto_shash_spawn *spawn)
 119 {
 120         crypto_drop_spawn(&spawn->base);
 121 }
 122
 123 struct shash_alg *shash_attr_alg(struct rtattr *rta, u32 type, u32 mask);
 124
 125 int shash_ahash_update(struct ahash_request *req, struct shash_desc *desc);
 126 int shash_ahash_finup(struct ahash_request *req, struct shash_desc *desc);
 127 int shash_ahash_digest(struct ahash_request *req, 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_instance(name, alg, ahash_instance_headroom());
 174 }
 175
 176 static inline void ahash_request_complete(struct ahash_request *req, int err)
 177 {
 178         req->base.complete(&req->base, err);
 179 }
 180
 181 static inline u32 ahash_request_flags(struct ahash_request *req)
 182 {
 183         return req->base.flags;
 184 }
 185
 186 static inline struct crypto_ahash *crypto_spawn_ahash(
 187         struct crypto_ahash_spawn *spawn)
 188 {
 189         return crypto_spawn_tfm2(&spawn->base);
 190 }
 191
 192 static inline int ahash_enqueue_request(struct crypto_queue *queue,
 193                                              struct ahash_request *request)
 194 {
 195         return crypto_enqueue_request(queue, &request->base);
 196 }
 197
 198 static inline struct ahash_request *ahash_dequeue_request(
 199         struct crypto_queue *queue)
 200 {
 201         return ahash_request_cast(crypto_dequeue_request(queue));
 202 }
 203
 204 static inline int ahash_tfm_in_queue(struct crypto_queue *queue,
 205                                           struct crypto_ahash *tfm)
 206 {
 207         return crypto_tfm_in_queue(queue, crypto_ahash_tfm(tfm));
 208 }
 209
 210 static inline void *crypto_shash_ctx(struct crypto_shash *tfm)
 211 {
 212         return crypto_tfm_ctx(&tfm->base);
 213 }
 214
 215 static inline struct crypto_instance *shash_crypto_instance(
 216         struct shash_instance *inst)
 217 {
 218         return container_of(&inst->alg.base, struct crypto_instance, alg);
 219 }
 220
 221 static inline struct shash_instance *shash_instance(
 222         struct crypto_instance *inst)
 223 {
 224         return container_of(__crypto_shash_alg(&inst->alg),
 225                             struct shash_instance, alg);
 226 }
 227
 228 static inline void *shash_instance_ctx(struct shash_instance *inst)
 229 {
 230         return crypto_instance_ctx(shash_crypto_instance(inst));
 231 }
 232
 233 static inline struct shash_instance *shash_alloc_instance(
 234         const char *name, struct crypto_alg *alg)
 235 {
 236         return crypto_alloc_instance(name, alg,
 237                                      sizeof(struct shash_alg) - sizeof(*alg));
 238 }
 239
 240 static inline struct crypto_shash *crypto_spawn_shash(
 241         struct crypto_shash_spawn *spawn)
 242 {
 243         return crypto_spawn_tfm2(&spawn->base);
 244 }
 245
 246 static inline void *crypto_shash_ctx_aligned(struct crypto_shash *tfm)
 247 {
 248         return crypto_tfm_ctx_aligned(&tfm->base);
 249 }
 250
 251 static inline struct crypto_shash *__crypto_shash_cast(struct crypto_tfm *tfm)
 252 {
 253         return container_of(tfm, struct crypto_shash, base);
 254 }
 255
 256 #endif  /* _CRYPTO_INTERNAL_HASH_H */
 257