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