include/crypto/hash.h

   1 /*
   2  * Hash: Hash algorithms under the crypto API
   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_HASH_H
  14 #define _CRYPTO_HASH_H
  15
  16 #include <linux/crypto.h>
  17
  18 struct crypto_ahash;
  19
  20 struct hash_alg_common {
  21         unsigned int digestsize;
  22         unsigned int statesize;
  23
  24         struct crypto_alg base;
  25 };
  26
  27 struct ahash_request {
  28         struct crypto_async_request base;
  29
  30         unsigned int nbytes;
  31         struct scatterlist *src;
  32         u8 *result;
  33
  34         /* This field may only be used by the ahash API code. */
  35         void *priv;
  36
  37         void *__ctx[] CRYPTO_MINALIGN_ATTR;
  38 };
  39
  40 struct ahash_alg {
  41         int (*init)(struct ahash_request *req);
  42         int (*update)(struct ahash_request *req);
  43         int (*final)(struct ahash_request *req);
  44         int (*finup)(struct ahash_request *req);
  45         int (*digest)(struct ahash_request *req);
  46         int (*export)(struct ahash_request *req, void *out);
  47         int (*import)(struct ahash_request *req, const void *in);
  48         int (*setkey)(struct crypto_ahash *tfm, const u8 *key,
  49                       unsigned int keylen);
  50
  51         struct hash_alg_common halg;
  52 };
  53
  54 struct shash_desc {
  55         struct crypto_shash *tfm;
  56         u32 flags;
  57
  58         void *__ctx[] CRYPTO_MINALIGN_ATTR;
  59 };
  60
  61 struct shash_alg {
  62         int (*init)(struct shash_desc *desc);
  63         int (*update)(struct shash_desc *desc, const u8 *data,
  64                       unsigned int len);
  65         int (*final)(struct shash_desc *desc, u8 *out);
  66         int (*finup)(struct shash_desc *desc, const u8 *data,
  67                      unsigned int len, u8 *out);
  68         int (*digest)(struct shash_desc *desc, const u8 *data,
  69                       unsigned int len, u8 *out);
  70         int (*export)(struct shash_desc *desc, void *out);
  71         int (*import)(struct shash_desc *desc, const void *in);
  72         int (*setkey)(struct crypto_shash *tfm, const u8 *key,
  73                       unsigned int keylen);
  74
  75         unsigned int descsize;
  76
  77         /* These fields must match hash_alg_common. */
  78         unsigned int digestsize
  79                 __attribute__ ((aligned(__alignof__(struct hash_alg_common))));
  80         unsigned int statesize;
  81
  82         struct crypto_alg base;
  83 };
  84
  85 struct crypto_ahash {
  86         int (*init)(struct ahash_request *req);
  87         int (*update)(struct ahash_request *req);
  88         int (*final)(struct ahash_request *req);
  89         int (*finup)(struct ahash_request *req);
  90         int (*digest)(struct ahash_request *req);
  91         int (*export)(struct ahash_request *req, void *out);
  92         int (*import)(struct ahash_request *req, const void *in);
  93         int (*setkey)(struct crypto_ahash *tfm, const u8 *key,
  94                       unsigned int keylen);
  95
  96         unsigned int reqsize;
  97         struct crypto_tfm base;
  98 };
  99
 100 struct crypto_shash {
 101         unsigned int descsize;
 102         struct crypto_tfm base;
 103 };
 104
 105 static inline struct crypto_ahash *__crypto_ahash_cast(struct crypto_tfm *tfm)
 106 {
 107         return container_of(tfm, struct crypto_ahash, base);
 108 }
 109
 110 struct crypto_ahash *crypto_alloc_ahash(const char *alg_name, u32 type,
 111                                         u32 mask);
 112
 113 static inline struct crypto_tfm *crypto_ahash_tfm(struct crypto_ahash *tfm)
 114 {
 115         return &tfm->base;
 116 }
 117
 118 static inline void crypto_free_ahash(struct crypto_ahash *tfm)
 119 {
 120         crypto_destroy_tfm(tfm, crypto_ahash_tfm(tfm));
 121 }
 122
 123 static inline unsigned int crypto_ahash_alignmask(
 124         struct crypto_ahash *tfm)
 125 {
 126         return crypto_tfm_alg_alignmask(crypto_ahash_tfm(tfm));
 127 }
 128
 129 static inline struct hash_alg_common *__crypto_hash_alg_common(
 130         struct crypto_alg *alg)
 131 {
 132         return container_of(alg, struct hash_alg_common, base);
 133 }
 134
 135 static inline struct hash_alg_common *crypto_hash_alg_common(
 136         struct crypto_ahash *tfm)
 137 {
 138         return __crypto_hash_alg_common(crypto_ahash_tfm(tfm)->__crt_alg);
 139 }
 140
 141 static inline unsigned int crypto_ahash_digestsize(struct crypto_ahash *tfm)
 142 {
 143         return crypto_hash_alg_common(tfm)->digestsize;
 144 }
 145
 146 static inline unsigned int crypto_ahash_statesize(struct crypto_ahash *tfm)
 147 {
 148         return crypto_hash_alg_common(tfm)->statesize;
 149 }
 150
 151 static inline u32 crypto_ahash_get_flags(struct crypto_ahash *tfm)
 152 {
 153         return crypto_tfm_get_flags(crypto_ahash_tfm(tfm));
 154 }
 155
 156 static inline void crypto_ahash_set_flags(struct crypto_ahash *tfm, u32 flags)
 157 {
 158         crypto_tfm_set_flags(crypto_ahash_tfm(tfm), flags);
 159 }
 160
 161 static inline void crypto_ahash_clear_flags(struct crypto_ahash *tfm, u32 flags)
 162 {
 163         crypto_tfm_clear_flags(crypto_ahash_tfm(tfm), flags);
 164 }
 165
 166 static inline struct crypto_ahash *crypto_ahash_reqtfm(
 167         struct ahash_request *req)
 168 {
 169         return __crypto_ahash_cast(req->base.tfm);
 170 }
 171
 172 static inline unsigned int crypto_ahash_reqsize(struct crypto_ahash *tfm)
 173 {
 174         return tfm->reqsize;
 175 }
 176
 177 static inline void *ahash_request_ctx(struct ahash_request *req)
 178 {
 179         return req->__ctx;
 180 }
 181
 182 int crypto_ahash_setkey(struct crypto_ahash *tfm, const u8 *key,
 183                         unsigned int keylen);
 184 int crypto_ahash_finup(struct ahash_request *req);
 185 int crypto_ahash_final(struct ahash_request *req);
 186 int crypto_ahash_digest(struct ahash_request *req);
 187
 188 static inline int crypto_ahash_export(struct ahash_request *req, void *out)
 189 {
 190         return crypto_ahash_reqtfm(req)->export(req, out);
 191 }
 192
 193 static inline int crypto_ahash_import(struct ahash_request *req, const void *in)
 194 {
 195         return crypto_ahash_reqtfm(req)->import(req, in);
 196 }
 197
 198 static inline int crypto_ahash_init(struct ahash_request *req)
 199 {
 200         return crypto_ahash_reqtfm(req)->init(req);
 201 }
 202
 203 static inline int crypto_ahash_update(struct ahash_request *req)
 204 {
 205         return crypto_ahash_reqtfm(req)->update(req);
 206 }
 207
 208 static inline void ahash_request_set_tfm(struct ahash_request *req,
 209                                          struct crypto_ahash *tfm)
 210 {
 211         req->base.tfm = crypto_ahash_tfm(tfm);
 212 }
 213
 214 static inline struct ahash_request *ahash_request_alloc(
 215         struct crypto_ahash *tfm, gfp_t gfp)
 216 {
 217         struct ahash_request *req;
 218
 219         req = kmalloc(sizeof(struct ahash_request) +
 220                       crypto_ahash_reqsize(tfm), gfp);
 221
 222         if (likely(req))
 223                 ahash_request_set_tfm(req, tfm);
 224
 225         return req;
 226 }
 227
 228 static inline void ahash_request_free(struct ahash_request *req)
 229 {
 230         kzfree(req);
 231 }
 232
 233 static inline struct ahash_request *ahash_request_cast(
 234         struct crypto_async_request *req)
 235 {
 236         return container_of(req, struct ahash_request, base);
 237 }
 238
 239 static inline void ahash_request_set_callback(struct ahash_request *req,
 240                                               u32 flags,
 241                                               crypto_completion_t complete,
 242                                               void *data)
 243 {
 244         req->base.complete = complete;
 245         req->base.data = data;
 246         req->base.flags = flags;
 247 }
 248
 249 static inline void ahash_request_set_crypt(struct ahash_request *req,
 250                                            struct scatterlist *src, u8 *result,
 251                                            unsigned int nbytes)
 252 {
 253         req->src = src;
 254         req->nbytes = nbytes;
 255         req->result = result;
 256 }
 257
 258 struct crypto_shash *crypto_alloc_shash(const char *alg_name, u32 type,
 259                                         u32 mask);
 260
 261 static inline struct crypto_tfm *crypto_shash_tfm(struct crypto_shash *tfm)
 262 {
 263         return &tfm->base;
 264 }
 265
 266 static inline void crypto_free_shash(struct crypto_shash *tfm)
 267 {
 268         crypto_destroy_tfm(tfm, crypto_shash_tfm(tfm));
 269 }
 270
 271 static inline unsigned int crypto_shash_alignmask(
 272         struct crypto_shash *tfm)
 273 {
 274         return crypto_tfm_alg_alignmask(crypto_shash_tfm(tfm));
 275 }
 276
 277 static inline unsigned int crypto_shash_blocksize(struct crypto_shash *tfm)
 278 {
 279         return crypto_tfm_alg_blocksize(crypto_shash_tfm(tfm));
 280 }
 281
 282 static inline struct shash_alg *__crypto_shash_alg(struct crypto_alg *alg)
 283 {
 284         return container_of(alg, struct shash_alg, base);
 285 }
 286
 287 static inline struct shash_alg *crypto_shash_alg(struct crypto_shash *tfm)
 288 {
 289         return __crypto_shash_alg(crypto_shash_tfm(tfm)->__crt_alg);
 290 }
 291
 292 static inline unsigned int crypto_shash_digestsize(struct crypto_shash *tfm)
 293 {
 294         return crypto_shash_alg(tfm)->digestsize;
 295 }
 296
 297 static inline unsigned int crypto_shash_statesize(struct crypto_shash *tfm)
 298 {
 299         return crypto_shash_alg(tfm)->statesize;
 300 }
 301
 302 static inline u32 crypto_shash_get_flags(struct crypto_shash *tfm)
 303 {
 304         return crypto_tfm_get_flags(crypto_shash_tfm(tfm));
 305 }
 306
 307 static inline void crypto_shash_set_flags(struct crypto_shash *tfm, u32 flags)
 308 {
 309         crypto_tfm_set_flags(crypto_shash_tfm(tfm), flags);
 310 }
 311
 312 static inline void crypto_shash_clear_flags(struct crypto_shash *tfm, u32 flags)
 313 {
 314         crypto_tfm_clear_flags(crypto_shash_tfm(tfm), flags);
 315 }
 316
 317 static inline unsigned int crypto_shash_descsize(struct crypto_shash *tfm)
 318 {
 319         return tfm->descsize;
 320 }
 321
 322 static inline void *shash_desc_ctx(struct shash_desc *desc)
 323 {
 324         return desc->__ctx;
 325 }
 326
 327 int crypto_shash_setkey(struct crypto_shash *tfm, const u8 *key,
 328                         unsigned int keylen);
 329 int crypto_shash_digest(struct shash_desc *desc, const u8 *data,
 330                         unsigned int len, u8 *out);
 331
 332 static inline int crypto_shash_export(struct shash_desc *desc, void *out)
 333 {
 334         return crypto_shash_alg(desc->tfm)->export(desc, out);
 335 }
 336
 337 static inline int crypto_shash_import(struct shash_desc *desc, const void *in)
 338 {
 339         return crypto_shash_alg(desc->tfm)->import(desc, in);
 340 }
 341
 342 static inline int crypto_shash_init(struct shash_desc *desc)
 343 {
 344         return crypto_shash_alg(desc->tfm)->init(desc);
 345 }
 346
 347 int crypto_shash_update(struct shash_desc *desc, const u8 *data,
 348                         unsigned int len);
 349 int crypto_shash_final(struct shash_desc *desc, u8 *out);
 350 int crypto_shash_finup(struct shash_desc *desc, const u8 *data,
 351                        unsigned int len, u8 *out);
 352
 353 #endif  /* _CRYPTO_HASH_H */