include/crypto/internal/rng.h

   1 /*
   2  * RNG: Random Number Generator  algorithms under the crypto API
   3  *
   4  * Copyright (c) 2008 Neil Horman <nhorman@tuxdriver.com>
   5  * Copyright (c) 2015 Herbert Xu <herbert@gondor.apana.org.au>
   6  *
   7  * This program is free software; you can redistribute it and/or modify it
   8  * under the terms of the GNU General Public License as published by the Free
   9  * Software Foundation; either version 2 of the License, or (at your option)
  10  * any later version.
  11  *
  12  */
  13
  14 #ifndef _CRYPTO_INTERNAL_RNG_H
  15 #define _CRYPTO_INTERNAL_RNG_H
  16
  17 #include <crypto/algapi.h>
  18 #include <crypto/rng.h>
  19
  20 int crypto_register_rng(struct rng_alg *alg);
  21 void crypto_unregister_rng(struct rng_alg *alg);
  22 int crypto_register_rngs(struct rng_alg *algs, int count);
  23 void crypto_unregister_rngs(struct rng_alg *algs, int count);
  24
  25 #if defined(CONFIG_CRYPTO_RNG) || defined(CONFIG_CRYPTO_RNG_MODULE)
  26 int crypto_del_default_rng(void);
  27 #else
  28 static inline int crypto_del_default_rng(void)
  29 {
  30         return 0;
  31 }
  32 #endif
  33
  34 static inline void *crypto_rng_ctx(struct crypto_rng *tfm)
  35 {
  36         return crypto_tfm_ctx(&tfm->base);
  37 }
  38
  39 static inline void crypto_rng_set_entropy(struct crypto_rng *tfm,
  40                                           const u8 *data, unsigned int len)
  41 {
  42         crypto_rng_alg(tfm)->set_ent(tfm, data, len);
  43 }
  44
  45 #endif