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_ahash_walk_first(struct ahash_request *req,
  59                            struct crypto_hash_walk *walk);
  60 int crypto_hash_walk_first_compat(struct hash_desc *hdesc,
  61                                   struct crypto_hash_walk *walk,
  62                                   struct scatterlist *sg, unsigned int len);
  63
  64 static inline int crypto_ahash_walk_done(struct crypto_hash_walk *walk,
  65                                          int err)
  66 {
  67         return crypto_hash_walk_done(walk, err);
  68 }
  69
  70 static inline int crypto_hash_walk_last(struct crypto_hash_walk *walk)
  71 {
  72         return !(walk->entrylen | walk->total);
  73 }
  74
  75 static inline int crypto_ahash_walk_last(struct crypto_hash_walk *walk)
  76 {
  77         return crypto_hash_walk_last(walk);
  78 }
  79
  80 int crypto_register_ahash(struct ahash_alg *alg);
  81 int crypto_unregister_ahash(struct ahash_alg *alg);
  82 int ahash_register_instance(struct crypto_template *tmpl,
  83                             struct ahash_instance *inst);
  84 void ahash_free_instance(struct crypto_instance *inst);
  85
  86 int shash_no_setkey(struct crypto_shash *tfm, const u8 *key,
  87                     unsigned int keylen);
  88
  89 static inline bool crypto_shash_alg_has_setkey(struct shash_alg *alg)
  90 {
  91         return alg->setkey != shash_no_setkey;
  92 }
  93
  94 int crypto_init_ahash_spawn(struct crypto_ahash_spawn *spawn,
  95                             struct hash_alg_common *alg,
  96                             struct crypto_instance *inst);
  97
  98 static inline void crypto_drop_ahash(struct crypto_ahash_spawn *spawn)
  99 {
 100         crypto_drop_spawn(&spawn->base);
 101 }
 102
 103 struct hash_alg_common *ahash_attr_alg(struct rtattr *rta, u32 type, u32 mask);
 104
 105 int crypto_register_shash(struct shash_alg *alg);
 106 int crypto_unregister_shash(struct shash_alg *alg);
 107 int crypto_register_shashes(struct shash_alg *algs, int count);
 108 int crypto_unregister_shashes(struct shash_alg *algs, int count);
 109 int shash_register_instance(struct crypto_template *tmpl,
 110                             struct shash_instance *inst);
 111 void shash_free_instance(struct crypto_instance *inst);
 112
 113 int crypto_init_shash_spawn(struct crypto_shash_spawn *spawn,
 114                             struct shash_alg *alg,
 115                             struct crypto_instance *inst);
 116
 117 static inline void crypto_drop_shash(struct crypto_shash_spawn *spawn)
 118 {
 119         crypto_drop_spawn(&spawn->base);
 120 }
 121
 122 struct shash_alg *shash_attr_alg(struct rtattr *rta, u32 type, u32 mask);
 123
 124 int shash_ahash_update(struct ahash_request *req, struct shash_desc *desc);
 125 int shash_ahash_finup(struct ahash_request *req, struct shash_desc *desc);
 126 int shash_ahash_digest(struct ahash_request *req, struct shash_desc *desc);
 127
 128 int crypto_init_shash_ops_async(struct crypto_tfm *tfm);
 129
 130 static inline void *crypto_ahash_ctx(struct crypto_ahash *tfm)
 131 {
 132         return crypto_tfm_ctx(crypto_ahash_tfm(tfm));
 133 }
 134
 135 static inline struct ahash_alg *__crypto_ahash_alg(struct crypto_alg *alg)
 136 {
 137         return container_of(__crypto_hash_alg_common(alg), struct ahash_alg,
 138                             halg);
 139 }
 140
 141 static inline void crypto_ahash_set_reqsize(struct crypto_ahash *tfm,
 142                                             unsigned int reqsize)
 143 {
 144         tfm->reqsize = reqsize;
 145 }
 146
 147 static inline struct crypto_instance *ahash_crypto_instance(
 148         struct ahash_instance *inst)
 149 {
 150         return container_of(&inst->alg.halg.base, struct crypto_instance, alg);
 151 }
 152
 153 static inline struct ahash_instance *ahash_instance(
 154         struct crypto_instance *inst)
 155 {
 156         return container_of(&inst->alg, struct ahash_instance, alg.halg.base);
 157 }
 158
 159 static inline void *ahash_instance_ctx(struct ahash_instance *inst)
 160 {
 161         return crypto_instance_ctx(ahash_crypto_instance(inst));
 162 }
 163
 164 static inline unsigned int ahash_instance_headroom(void)
 165 {
 166         return sizeof(struct ahash_alg) - sizeof(struct crypto_alg);
 167 }
 168
 169 static inline struct ahash_instance *ahash_alloc_instance(
 170         const char *name, struct crypto_alg *alg)
 171 {
 172         return crypto_alloc_instance2(name, alg, ahash_instance_headroom());
 173 }
 174
 175 static inline void ahash_request_complete(struct ahash_request *req, int err)
 176 {
 177         req->base.complete(&req->base, err);
 178 }
 179
 180 static inline u32 ahash_request_flags(struct ahash_request *req)
 181 {
 182         return req->base.flags;
 183 }
 184
 185 static inline struct crypto_ahash *crypto_spawn_ahash(
 186         struct crypto_ahash_spawn *spawn)
 187 {
 188         return crypto_spawn_tfm2(&spawn->base);
 189 }
 190
 191 static inline int ahash_enqueue_request(struct crypto_queue *queue,
 192                                              struct ahash_request *request)
 193 {
 194         return crypto_enqueue_request(queue, &request->base);
 195 }
 196
 197 static inline struct ahash_request *ahash_dequeue_request(
 198         struct crypto_queue *queue)
 199 {
 200         return ahash_request_cast(crypto_dequeue_request(queue));
 201 }
 202
 203 static inline int ahash_tfm_in_queue(struct crypto_queue *queue,
 204                                           struct crypto_ahash *tfm)
 205 {
 206         return crypto_tfm_in_queue(queue, crypto_ahash_tfm(tfm));
 207 }
 208
 209 static inline void *crypto_shash_ctx(struct crypto_shash *tfm)
 210 {
 211         return crypto_tfm_ctx(&tfm->base);
 212 }
 213
 214 static inline struct crypto_instance *shash_crypto_instance(
 215         struct shash_instance *inst)
 216 {
 217         return container_of(&inst->alg.base, struct crypto_instance, alg);
 218 }
 219
 220 static inline struct shash_instance *shash_instance(
 221         struct crypto_instance *inst)
 222 {
 223         return container_of(__crypto_shash_alg(&inst->alg),
 224                             struct shash_instance, alg);
 225 }
 226
 227 static inline void *shash_instance_ctx(struct shash_instance *inst)
 228 {
 229         return crypto_instance_ctx(shash_crypto_instance(inst));
 230 }
 231
 232 static inline struct shash_instance *shash_alloc_instance(
 233         const char *name, struct crypto_alg *alg)
 234 {
 235         return crypto_alloc_instance2(name, alg,
 236                                       sizeof(struct shash_alg) - sizeof(*alg));
 237 }
 238
 239 static inline struct crypto_shash *crypto_spawn_shash(
 240         struct crypto_shash_spawn *spawn)
 241 {
 242         return crypto_spawn_tfm2(&spawn->base);
 243 }
 244
 245 static inline void *crypto_shash_ctx_aligned(struct crypto_shash *tfm)
 246 {
 247         return crypto_tfm_ctx_aligned(&tfm->base);
 248 }
 249
 250 static inline struct crypto_shash *__crypto_shash_cast(struct crypto_tfm *tfm)
 251 {
 252         return container_of(tfm, struct crypto_shash, base);
 253 }
 254
 255 #endif  /* _CRYPTO_INTERNAL_HASH_H */
 256