include/crypto/internal/rng.h

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2 /*
   3  * RNG: Random Number Generator  algorithms under the crypto API
   4  *
   5  * Copyright (c) 2008 Neil Horman <nhorman@tuxdriver.com>
   6  * Copyright (c) 2015 Herbert Xu <herbert@gondor.apana.org.au>
   7  */
   8
   9 #ifndef _CRYPTO_INTERNAL_RNG_H
  10 #define _CRYPTO_INTERNAL_RNG_H
  11
  12 #include <crypto/algapi.h>
  13 #include <crypto/rng.h>
  14
  15 int crypto_register_rng(struct rng_alg *alg);
  16 void crypto_unregister_rng(struct rng_alg *alg);
  17 int crypto_register_rngs(struct rng_alg *algs, int count);
  18 void crypto_unregister_rngs(struct rng_alg *algs, int count);
  19
  20 #if defined(CONFIG_CRYPTO_RNG) || defined(CONFIG_CRYPTO_RNG_MODULE)
  21 int crypto_del_default_rng(void);
  22 #else
  23 static inline int crypto_del_default_rng(void)
  24 {
  25         return 0;
  26 }
  27 #endif
  28
  29 static inline void *crypto_rng_ctx(struct crypto_rng *tfm)
  30 {
  31         return crypto_tfm_ctx(&tfm->base);
  32 }
  33
  34 static inline void crypto_rng_set_entropy(struct crypto_rng *tfm,
  35                                           const u8 *data, unsigned int len)
  36 {
  37         crypto_rng_alg(tfm)->set_ent(tfm, data, len);
  38 }
  39
  40 #endif