linux/include/crypto/internal/hash.h
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   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
  14struct ahash_request;
  15struct scatterlist;
  16
  17struct 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
  32struct 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
  43struct 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
  54struct crypto_ahash_spawn {
  55        struct crypto_spawn base;
  56};
  57
  58struct crypto_shash_spawn {
  59        struct crypto_spawn base;
  60};
  61
  62int crypto_hash_walk_done(struct crypto_hash_walk *walk, int err);
  63int crypto_hash_walk_first(struct ahash_request *req,
  64                           struct crypto_hash_walk *walk);
  65
  66static inline int crypto_hash_walk_last(struct crypto_hash_walk *walk)
  67{
  68        return !(walk->entrylen | walk->total);
  69}
  70
  71int crypto_register_ahash(struct ahash_alg *alg);
  72void crypto_unregister_ahash(struct ahash_alg *alg);
  73int crypto_register_ahashes(struct ahash_alg *algs, int count);
  74void crypto_unregister_ahashes(struct ahash_alg *algs, int count);
  75int ahash_register_instance(struct crypto_template *tmpl,
  76                            struct ahash_instance *inst);
  77
  78bool crypto_shash_alg_has_setkey(struct shash_alg *alg);
  79
  80static 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
  86bool crypto_hash_alg_has_setkey(struct hash_alg_common *halg);
  87
  88int crypto_grab_ahash(struct crypto_ahash_spawn *spawn,
  89                      struct crypto_instance *inst,
  90                      const char *name, u32 type, u32 mask);
  91
  92static inline void crypto_drop_ahash(struct crypto_ahash_spawn *spawn)
  93{
  94        crypto_drop_spawn(&spawn->base);
  95}
  96
  97static 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
 103int crypto_register_shash(struct shash_alg *alg);
 104void crypto_unregister_shash(struct shash_alg *alg);
 105int crypto_register_shashes(struct shash_alg *algs, int count);
 106void crypto_unregister_shashes(struct shash_alg *algs, int count);
 107int shash_register_instance(struct crypto_template *tmpl,
 108                            struct shash_instance *inst);
 109void shash_free_singlespawn_instance(struct shash_instance *inst);
 110
 111int crypto_grab_shash(struct crypto_shash_spawn *spawn,
 112                      struct crypto_instance *inst,
 113                      const char *name, u32 type, u32 mask);
 114
 115static inline void crypto_drop_shash(struct crypto_shash_spawn *spawn)
 116{
 117        crypto_drop_spawn(&spawn->base);
 118}
 119
 120static 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
 126int shash_ahash_update(struct ahash_request *req, struct shash_desc *desc);
 127int shash_ahash_finup(struct ahash_request *req, struct shash_desc *desc);
 128int shash_ahash_digest(struct ahash_request *req, struct shash_desc *desc);
 129
 130int crypto_init_shash_ops_async(struct crypto_tfm *tfm);
 131
 132static inline void *crypto_ahash_ctx(struct crypto_ahash *tfm)
 133{
 134        return crypto_tfm_ctx(crypto_ahash_tfm(tfm));
 135}
 136
 137static 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
 143static inline void crypto_ahash_set_reqsize(struct crypto_ahash *tfm,
 144                                            unsigned int reqsize)
 145{
 146        tfm->reqsize = reqsize;
 147}
 148
 149static inline struct crypto_instance *ahash_crypto_instance(
 150        struct ahash_instance *inst)
 151{
 152        return &inst->s.base;
 153}
 154
 155static inline struct ahash_instance *ahash_instance(
 156        struct crypto_instance *inst)
 157{
 158        return container_of(inst, struct ahash_instance, s.base);
 159}
 160
 161static 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
 167static inline void *ahash_instance_ctx(struct ahash_instance *inst)
 168{
 169        return crypto_instance_ctx(ahash_crypto_instance(inst));
 170}
 171
 172static inline void ahash_request_complete(struct ahash_request *req, int err)
 173{
 174        req->base.complete(&req->base, err);
 175}
 176
 177static inline u32 ahash_request_flags(struct ahash_request *req)
 178{
 179        return req->base.flags;
 180}
 181
 182static inline struct crypto_ahash *crypto_spawn_ahash(
 183        struct crypto_ahash_spawn *spawn)
 184{
 185        return crypto_spawn_tfm2(&spawn->base);
 186}
 187
 188static 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
 194static inline struct ahash_request *ahash_dequeue_request(
 195        struct crypto_queue *queue)
 196{
 197        return ahash_request_cast(crypto_dequeue_request(queue));
 198}
 199
 200static inline void *crypto_shash_ctx(struct crypto_shash *tfm)
 201{
 202        return crypto_tfm_ctx(&tfm->base);
 203}
 204
 205static inline struct crypto_instance *shash_crypto_instance(
 206        struct shash_instance *inst)
 207{
 208        return &inst->s.base;
 209}
 210
 211static inline struct shash_instance *shash_instance(
 212        struct crypto_instance *inst)
 213{
 214        return container_of(inst, struct shash_instance, s.base);
 215}
 216
 217static 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
 223static inline void *shash_instance_ctx(struct shash_instance *inst)
 224{
 225        return crypto_instance_ctx(shash_crypto_instance(inst));
 226}
 227
 228static inline struct crypto_shash *crypto_spawn_shash(
 229        struct crypto_shash_spawn *spawn)
 230{
 231        return crypto_spawn_tfm2(&spawn->base);
 232}
 233
 234static inline void *crypto_shash_ctx_aligned(struct crypto_shash *tfm)
 235{
 236        return crypto_tfm_ctx_aligned(&tfm->base);
 237}
 238
 239static 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
 246
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