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_hash_walk_first_compat(struct hash_desc *hdesc,
  59                                   struct crypto_hash_walk *walk,
  60                                   struct scatterlist *sg, unsigned int len);
  61
  62 static inline int crypto_hash_walk_last(struct crypto_hash_walk *walk)
  63 {
  64         return !(walk->entrylen | walk->total);
  65 }
  66
  67 int crypto_register_ahash(struct ahash_alg *alg);
  68 int crypto_unregister_ahash(struct ahash_alg *alg);
  69 int ahash_register_instance(struct crypto_template *tmpl,
  70                             struct ahash_instance *inst);
  71 void ahash_free_instance(struct crypto_instance *inst);
  72
  73 int shash_no_setkey(struct crypto_shash *tfm, const u8 *key,
  74                     unsigned int keylen);
  75
  76 static inline bool crypto_shash_alg_has_setkey(struct shash_alg *alg)
  77 {
  78         return alg->setkey != shash_no_setkey;
  79 }
  80
  81 int crypto_init_ahash_spawn(struct crypto_ahash_spawn *spawn,
  82                             struct hash_alg_common *alg,
  83                             struct crypto_instance *inst);
  84
  85 static inline void crypto_drop_ahash(struct crypto_ahash_spawn *spawn)
  86 {
  87         crypto_drop_spawn(&spawn->base);
  88 }
  89
  90 struct hash_alg_common *ahash_attr_alg(struct rtattr *rta, u32 type, u32 mask);
  91
  92 int crypto_register_shash(struct shash_alg *alg);
  93 int crypto_unregister_shash(struct shash_alg *alg);
  94 int shash_register_instance(struct crypto_template *tmpl,
  95                             struct shash_instance *inst);
  96 void shash_free_instance(struct crypto_instance *inst);
  97
  98 int crypto_init_shash_spawn(struct crypto_shash_spawn *spawn,
  99                             struct shash_alg *alg,
 100                             struct crypto_instance *inst);
 101
 102 static inline void crypto_drop_shash(struct crypto_shash_spawn *spawn)
 103 {
 104         crypto_drop_spawn(&spawn->base);
 105 }
 106
 107 struct shash_alg *shash_attr_alg(struct rtattr *rta, u32 type, u32 mask);
 108
 109 int shash_ahash_update(struct ahash_request *req, struct shash_desc *desc);
 110 int shash_ahash_finup(struct ahash_request *req, struct shash_desc *desc);
 111 int shash_ahash_digest(struct ahash_request *req, struct shash_desc *desc);
 112
 113 int crypto_init_shash_ops_async(struct crypto_tfm *tfm);
 114
 115 static inline void *crypto_ahash_ctx(struct crypto_ahash *tfm)
 116 {
 117         return crypto_tfm_ctx(crypto_ahash_tfm(tfm));
 118 }
 119
 120 static inline struct ahash_alg *__crypto_ahash_alg(struct crypto_alg *alg)
 121 {
 122         return container_of(__crypto_hash_alg_common(alg), struct ahash_alg,
 123                             halg);
 124 }
 125
 126 static inline void crypto_ahash_set_reqsize(struct crypto_ahash *tfm,
 127                                             unsigned int reqsize)
 128 {
 129         tfm->reqsize = reqsize;
 130 }
 131
 132 static inline struct crypto_instance *ahash_crypto_instance(
 133         struct ahash_instance *inst)
 134 {
 135         return container_of(&inst->alg.halg.base, struct crypto_instance, alg);
 136 }
 137
 138 static inline struct ahash_instance *ahash_instance(
 139         struct crypto_instance *inst)
 140 {
 141         return container_of(&inst->alg, struct ahash_instance, alg.halg.base);
 142 }
 143
 144 static inline void *ahash_instance_ctx(struct ahash_instance *inst)
 145 {
 146         return crypto_instance_ctx(ahash_crypto_instance(inst));
 147 }
 148
 149 static inline unsigned int ahash_instance_headroom(void)
 150 {
 151         return sizeof(struct ahash_alg) - sizeof(struct crypto_alg);
 152 }
 153
 154 static inline struct ahash_instance *ahash_alloc_instance(
 155         const char *name, struct crypto_alg *alg)
 156 {
 157         return crypto_alloc_instance2(name, alg, ahash_instance_headroom());
 158 }
 159
 160 static inline void ahash_request_complete(struct ahash_request *req, int err)
 161 {
 162         req->base.complete(&req->base, err);
 163 }
 164
 165 static inline u32 ahash_request_flags(struct ahash_request *req)
 166 {
 167         return req->base.flags;
 168 }
 169
 170 static inline struct crypto_ahash *crypto_spawn_ahash(
 171         struct crypto_ahash_spawn *spawn)
 172 {
 173         return crypto_spawn_tfm2(&spawn->base);
 174 }
 175
 176 static inline int ahash_enqueue_request(struct crypto_queue *queue,
 177                                              struct ahash_request *request)
 178 {
 179         return crypto_enqueue_request(queue, &request->base);
 180 }
 181
 182 static inline struct ahash_request *ahash_dequeue_request(
 183         struct crypto_queue *queue)
 184 {
 185         return ahash_request_cast(crypto_dequeue_request(queue));
 186 }
 187
 188 static inline int ahash_tfm_in_queue(struct crypto_queue *queue,
 189                                           struct crypto_ahash *tfm)
 190 {
 191         return crypto_tfm_in_queue(queue, crypto_ahash_tfm(tfm));
 192 }
 193
 194 static inline void *crypto_shash_ctx(struct crypto_shash *tfm)
 195 {
 196         return crypto_tfm_ctx(&tfm->base);
 197 }
 198
 199 static inline struct crypto_instance *shash_crypto_instance(
 200         struct shash_instance *inst)
 201 {
 202         return container_of(&inst->alg.base, struct crypto_instance, alg);
 203 }
 204
 205 static inline struct shash_instance *shash_instance(
 206         struct crypto_instance *inst)
 207 {
 208         return container_of(__crypto_shash_alg(&inst->alg),
 209                             struct shash_instance, alg);
 210 }
 211
 212 static inline void *shash_instance_ctx(struct shash_instance *inst)
 213 {
 214         return crypto_instance_ctx(shash_crypto_instance(inst));
 215 }
 216
 217 static inline struct shash_instance *shash_alloc_instance(
 218         const char *name, struct crypto_alg *alg)
 219 {
 220         return crypto_alloc_instance2(name, alg,
 221                                       sizeof(struct shash_alg) - sizeof(*alg));
 222 }
 223
 224 static inline struct crypto_shash *crypto_spawn_shash(
 225         struct crypto_shash_spawn *spawn)
 226 {
 227         return crypto_spawn_tfm2(&spawn->base);
 228 }
 229
 230 static inline void *crypto_shash_ctx_aligned(struct crypto_shash *tfm)
 231 {
 232         return crypto_tfm_ctx_aligned(&tfm->base);
 233 }
 234
 235 static inline struct crypto_shash *__crypto_shash_cast(struct crypto_tfm *tfm)
 236 {
 237         return container_of(tfm, struct crypto_shash, base);
 238 }
 239
 240 #endif  /* _CRYPTO_INTERNAL_HASH_H */
 241