include/crypto/internal/hash.h

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2 /*
   3  * Hash algorithms.
   4  *
   5  * Copyright (c) 2008 Herbert Xu <herbert@gondor.apana.org.au>
   6  */
   7
   8 #ifndef _CRYPTO_INTERNAL_HASH_H
   9 #define _CRYPTO_INTERNAL_HASH_H
  10
  11 #include <crypto/algapi.h>
  12 #include <crypto/hash.h>
  13
  14 struct ahash_request;
  15 struct scatterlist;
  16
  17 struct crypto_hash_walk {
  18         char *data;
  19
  20         unsigned int offset;
  21         unsigned int alignmask;
  22
  23         struct page *pg;
  24         unsigned int entrylen;
  25
  26         unsigned int total;
  27         struct scatterlist *sg;
  28
  29         unsigned int flags;
  30 };
  31
  32 struct ahash_instance {
  33         void (*free)(struct ahash_instance *inst);
  34         union {
  35                 struct {
  36                         char head[offsetof(struct ahash_alg, halg.base)];
  37                         struct crypto_instance base;
  38                 } s;
  39                 struct ahash_alg alg;
  40         };
  41 };
  42
  43 struct shash_instance {
  44         void (*free)(struct shash_instance *inst);
  45         union {
  46                 struct {
  47                         char head[offsetof(struct shash_alg, base)];
  48                         struct crypto_instance base;
  49                 } s;
  50                 struct shash_alg alg;
  51         };
  52 };
  53
  54 struct crypto_ahash_spawn {
  55         struct crypto_spawn base;
  56 };
  57
  58 struct crypto_shash_spawn {
  59         struct crypto_spawn base;
  60 };
  61
  62 int crypto_hash_walk_done(struct crypto_hash_walk *walk, int err);
  63 int crypto_hash_walk_first(struct ahash_request *req,
  64                            struct crypto_hash_walk *walk);
  65
  66 static inline int crypto_hash_walk_last(struct crypto_hash_walk *walk)
  67 {
  68         return !(walk->entrylen | walk->total);
  69 }
  70
  71 int crypto_register_ahash(struct ahash_alg *alg);
  72 void crypto_unregister_ahash(struct ahash_alg *alg);
  73 int crypto_register_ahashes(struct ahash_alg *algs, int count);
  74 void crypto_unregister_ahashes(struct ahash_alg *algs, int count);
  75 int ahash_register_instance(struct crypto_template *tmpl,
  76                             struct ahash_instance *inst);
  77
  78 bool crypto_shash_alg_has_setkey(struct shash_alg *alg);
  79
  80 static inline bool crypto_shash_alg_needs_key(struct shash_alg *alg)
  81 {
  82         return crypto_shash_alg_has_setkey(alg) &&
  83                 !(alg->base.cra_flags & CRYPTO_ALG_OPTIONAL_KEY);
  84 }
  85
  86 bool crypto_hash_alg_has_setkey(struct hash_alg_common *halg);
  87
  88 int crypto_grab_ahash(struct crypto_ahash_spawn *spawn,
  89                       struct crypto_instance *inst,
  90                       const char *name, u32 type, u32 mask);
  91
  92 static inline void crypto_drop_ahash(struct crypto_ahash_spawn *spawn)
  93 {
  94         crypto_drop_spawn(&spawn->base);
  95 }
  96
  97 static inline struct hash_alg_common *crypto_spawn_ahash_alg(
  98         struct crypto_ahash_spawn *spawn)
  99 {
 100         return __crypto_hash_alg_common(spawn->base.alg);
 101 }
 102
 103 int crypto_register_shash(struct shash_alg *alg);
 104 void crypto_unregister_shash(struct shash_alg *alg);
 105 int crypto_register_shashes(struct shash_alg *algs, int count);
 106 void crypto_unregister_shashes(struct shash_alg *algs, int count);
 107 int shash_register_instance(struct crypto_template *tmpl,
 108                             struct shash_instance *inst);
 109 void shash_free_singlespawn_instance(struct shash_instance *inst);
 110
 111 int crypto_grab_shash(struct crypto_shash_spawn *spawn,
 112                       struct crypto_instance *inst,
 113                       const char *name, u32 type, u32 mask);
 114
 115 static inline void crypto_drop_shash(struct crypto_shash_spawn *spawn)
 116 {
 117         crypto_drop_spawn(&spawn->base);
 118 }
 119
 120 static inline struct shash_alg *crypto_spawn_shash_alg(
 121         struct crypto_shash_spawn *spawn)
 122 {
 123         return __crypto_shash_alg(spawn->base.alg);
 124 }
 125
 126 int shash_ahash_update(struct ahash_request *req, struct shash_desc *desc);
 127 int shash_ahash_finup(struct ahash_request *req, struct shash_desc *desc);
 128 int shash_ahash_digest(struct ahash_request *req, struct shash_desc *desc);
 129
 130 int crypto_init_shash_ops_async(struct crypto_tfm *tfm);
 131
 132 static inline void *crypto_ahash_ctx(struct crypto_ahash *tfm)
 133 {
 134         return crypto_tfm_ctx(crypto_ahash_tfm(tfm));
 135 }
 136
 137 static inline struct ahash_alg *__crypto_ahash_alg(struct crypto_alg *alg)
 138 {
 139         return container_of(__crypto_hash_alg_common(alg), struct ahash_alg,
 140                             halg);
 141 }
 142
 143 static inline void crypto_ahash_set_reqsize(struct crypto_ahash *tfm,
 144                                             unsigned int reqsize)
 145 {
 146         tfm->reqsize = reqsize;
 147 }
 148
 149 static inline struct crypto_instance *ahash_crypto_instance(
 150         struct ahash_instance *inst)
 151 {
 152         return &inst->s.base;
 153 }
 154
 155 static inline struct ahash_instance *ahash_instance(
 156         struct crypto_instance *inst)
 157 {
 158         return container_of(inst, struct ahash_instance, s.base);
 159 }
 160
 161 static inline struct ahash_instance *ahash_alg_instance(
 162         struct crypto_ahash *ahash)
 163 {
 164         return ahash_instance(crypto_tfm_alg_instance(&ahash->base));
 165 }
 166
 167 static inline void *ahash_instance_ctx(struct ahash_instance *inst)
 168 {
 169         return crypto_instance_ctx(ahash_crypto_instance(inst));
 170 }
 171
 172 static inline void ahash_request_complete(struct ahash_request *req, int err)
 173 {
 174         req->base.complete(&req->base, err);
 175 }
 176
 177 static inline u32 ahash_request_flags(struct ahash_request *req)
 178 {
 179         return req->base.flags;
 180 }
 181
 182 static inline struct crypto_ahash *crypto_spawn_ahash(
 183         struct crypto_ahash_spawn *spawn)
 184 {
 185         return crypto_spawn_tfm2(&spawn->base);
 186 }
 187
 188 static inline int ahash_enqueue_request(struct crypto_queue *queue,
 189                                              struct ahash_request *request)
 190 {
 191         return crypto_enqueue_request(queue, &request->base);
 192 }
 193
 194 static inline struct ahash_request *ahash_dequeue_request(
 195         struct crypto_queue *queue)
 196 {
 197         return ahash_request_cast(crypto_dequeue_request(queue));
 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 &inst->s.base;
 209 }
 210
 211 static inline struct shash_instance *shash_instance(
 212         struct crypto_instance *inst)
 213 {
 214         return container_of(inst, struct shash_instance, s.base);
 215 }
 216
 217 static inline struct shash_instance *shash_alg_instance(
 218         struct crypto_shash *shash)
 219 {
 220         return shash_instance(crypto_tfm_alg_instance(&shash->base));
 221 }
 222
 223 static inline void *shash_instance_ctx(struct shash_instance *inst)
 224 {
 225         return crypto_instance_ctx(shash_crypto_instance(inst));
 226 }
 227
 228 static inline struct crypto_shash *crypto_spawn_shash(
 229         struct crypto_shash_spawn *spawn)
 230 {
 231         return crypto_spawn_tfm2(&spawn->base);
 232 }
 233
 234 static inline void *crypto_shash_ctx_aligned(struct crypto_shash *tfm)
 235 {
 236         return crypto_tfm_ctx_aligned(&tfm->base);
 237 }
 238
 239 static inline struct crypto_shash *__crypto_shash_cast(struct crypto_tfm *tfm)
 240 {
 241         return container_of(tfm, struct crypto_shash, base);
 242 }
 243
 244 #endif  /* _CRYPTO_INTERNAL_HASH_H */
 245