Line data    Source code

       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           0 : static inline int crypto_hash_walk_last(struct crypto_hash_walk *walk)
      67             : {
      68           0 :         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             : int shash_no_setkey(struct crypto_shash *tfm, const u8 *key,
      79             :                     unsigned int keylen);
      80             : 
      81           2 : static inline bool crypto_shash_alg_has_setkey(struct shash_alg *alg)
      82             : {
      83           0 :         return alg->setkey != shash_no_setkey;
      84             : }
      85             : 
      86           2 : static inline bool crypto_shash_alg_needs_key(struct shash_alg *alg)
      87             : {
      88           4 :         return crypto_shash_alg_has_setkey(alg) &&
      89           2 :                 !(alg->base.cra_flags & CRYPTO_ALG_OPTIONAL_KEY);
      90             : }
      91             : 
      92             : bool crypto_hash_alg_has_setkey(struct hash_alg_common *halg);
      93             : 
      94             : int crypto_grab_ahash(struct crypto_ahash_spawn *spawn,
      95             :                       struct crypto_instance *inst,
      96             :                       const char *name, u32 type, u32 mask);
      97             : 
      98             : static inline void crypto_drop_ahash(struct crypto_ahash_spawn *spawn)
      99             : {
     100             :         crypto_drop_spawn(&spawn->base);
     101             : }
     102             : 
     103             : static inline struct hash_alg_common *crypto_spawn_ahash_alg(
     104             :         struct crypto_ahash_spawn *spawn)
     105             : {
     106             :         return __crypto_hash_alg_common(spawn->base.alg);
     107             : }
     108             : 
     109             : int crypto_register_shash(struct shash_alg *alg);
     110             : void crypto_unregister_shash(struct shash_alg *alg);
     111             : int crypto_register_shashes(struct shash_alg *algs, int count);
     112             : void crypto_unregister_shashes(struct shash_alg *algs, int count);
     113             : int shash_register_instance(struct crypto_template *tmpl,
     114             :                             struct shash_instance *inst);
     115             : void shash_free_singlespawn_instance(struct shash_instance *inst);
     116             : 
     117             : int crypto_grab_shash(struct crypto_shash_spawn *spawn,
     118             :                       struct crypto_instance *inst,
     119             :                       const char *name, u32 type, u32 mask);
     120             : 
     121             : static inline void crypto_drop_shash(struct crypto_shash_spawn *spawn)
     122             : {
     123             :         crypto_drop_spawn(&spawn->base);
     124             : }
     125             : 
     126             : static inline struct shash_alg *crypto_spawn_shash_alg(
     127             :         struct crypto_shash_spawn *spawn)
     128             : {
     129             :         return __crypto_shash_alg(spawn->base.alg);
     130             : }
     131             : 
     132             : int shash_ahash_update(struct ahash_request *req, struct shash_desc *desc);
     133             : int shash_ahash_finup(struct ahash_request *req, struct shash_desc *desc);
     134             : int shash_ahash_digest(struct ahash_request *req, struct shash_desc *desc);
     135             : 
     136             : int crypto_init_shash_ops_async(struct crypto_tfm *tfm);
     137             : 
     138           0 : static inline void *crypto_ahash_ctx(struct crypto_ahash *tfm)
     139             : {
     140           0 :         return crypto_tfm_ctx(crypto_ahash_tfm(tfm));
     141             : }
     142             : 
     143           0 : static inline struct ahash_alg *__crypto_ahash_alg(struct crypto_alg *alg)
     144             : {
     145           0 :         return container_of(__crypto_hash_alg_common(alg), struct ahash_alg,
     146             :                             halg);
     147             : }
     148             : 
     149             : static inline void crypto_ahash_set_reqsize(struct crypto_ahash *tfm,
     150             :                                             unsigned int reqsize)
     151             : {
     152             :         tfm->reqsize = reqsize;
     153             : }
     154             : 
     155           0 : static inline struct crypto_instance *ahash_crypto_instance(
     156             :         struct ahash_instance *inst)
     157             : {
     158           0 :         return &inst->s.base;
     159             : }
     160             : 
     161           0 : static inline struct ahash_instance *ahash_instance(
     162             :         struct crypto_instance *inst)
     163             : {
     164           0 :         return container_of(inst, struct ahash_instance, s.base);
     165             : }
     166             : 
     167             : static inline struct ahash_instance *ahash_alg_instance(
     168             :         struct crypto_ahash *ahash)
     169             : {
     170             :         return ahash_instance(crypto_tfm_alg_instance(&ahash->base));
     171             : }
     172             : 
     173             : static inline void *ahash_instance_ctx(struct ahash_instance *inst)
     174             : {
     175             :         return crypto_instance_ctx(ahash_crypto_instance(inst));
     176             : }
     177             : 
     178             : static inline void ahash_request_complete(struct ahash_request *req, int err)
     179             : {
     180             :         req->base.complete(&req->base, err);
     181             : }
     182             : 
     183             : static inline u32 ahash_request_flags(struct ahash_request *req)
     184             : {
     185             :         return req->base.flags;
     186             : }
     187             : 
     188             : static inline struct crypto_ahash *crypto_spawn_ahash(
     189             :         struct crypto_ahash_spawn *spawn)
     190             : {
     191             :         return crypto_spawn_tfm2(&spawn->base);
     192             : }
     193             : 
     194             : static inline int ahash_enqueue_request(struct crypto_queue *queue,
     195             :                                              struct ahash_request *request)
     196             : {
     197             :         return crypto_enqueue_request(queue, &request->base);
     198             : }
     199             : 
     200             : static inline struct ahash_request *ahash_dequeue_request(
     201             :         struct crypto_queue *queue)
     202             : {
     203             :         return ahash_request_cast(crypto_dequeue_request(queue));
     204             : }
     205             : 
     206           0 : static inline void *crypto_shash_ctx(struct crypto_shash *tfm)
     207             : {
     208           0 :         return crypto_tfm_ctx(&tfm->base);
     209             : }
     210             : 
     211           0 : static inline struct crypto_instance *shash_crypto_instance(
     212             :         struct shash_instance *inst)
     213             : {
     214           0 :         return &inst->s.base;
     215             : }
     216             : 
     217           0 : static inline struct shash_instance *shash_instance(
     218             :         struct crypto_instance *inst)
     219             : {
     220           0 :         return container_of(inst, struct shash_instance, s.base);
     221             : }
     222             : 
     223             : static inline struct shash_instance *shash_alg_instance(
     224             :         struct crypto_shash *shash)
     225             : {
     226             :         return shash_instance(crypto_tfm_alg_instance(&shash->base));
     227             : }
     228             : 
     229           0 : static inline void *shash_instance_ctx(struct shash_instance *inst)
     230             : {
     231           0 :         return crypto_instance_ctx(shash_crypto_instance(inst));
     232             : }
     233             : 
     234             : static inline struct crypto_shash *crypto_spawn_shash(
     235             :         struct crypto_shash_spawn *spawn)
     236             : {
     237             :         return crypto_spawn_tfm2(&spawn->base);
     238             : }
     239             : 
     240             : static inline void *crypto_shash_ctx_aligned(struct crypto_shash *tfm)
     241             : {
     242             :         return crypto_tfm_ctx_aligned(&tfm->base);
     243             : }
     244             : 
     245           2 : static inline struct crypto_shash *__crypto_shash_cast(struct crypto_tfm *tfm)
     246             : {
     247           2 :         return container_of(tfm, struct crypto_shash, base);
     248             : }
     249             : 
     250             : #endif  /* _CRYPTO_INTERNAL_HASH_H */
     251             :