/* * RNG: Random Number Generator  algorithms under the crypto API * * Copyright (c) 2008 Neil Horman <nhorman@tuxdriver.com> * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License as published by the Free * Software Foundation; either version 2 of the License, or (at your option) * any later version. * */ #ifndef _CRYPTO_RNG_H#define _CRYPTO_RNG_H #include <linux/crypto.h> extern struct crypto_rng *crypto_default_rng; int crypto_get_default_rng(void);void crypto_put_default_rng(void); static inline struct crypto_rng *__crypto_rng_cast(struct crypto_tfm *tfm){	return (struct crypto_rng *)tfm;} static inline struct crypto_rng *crypto_alloc_rng(const char *alg_name,						  u32 type, u32 mask){	type &= ~CRYPTO_ALG_TYPE_MASK;	type |= CRYPTO_ALG_TYPE_RNG;	mask |= CRYPTO_ALG_TYPE_MASK; 	return __crypto_rng_cast(crypto_alloc_base(alg_name, type, mask));} static inline struct crypto_tfm *crypto_rng_tfm(struct crypto_rng *tfm){	return &tfm->base;} static inline struct rng_alg *crypto_rng_alg(struct crypto_rng *tfm){	return &crypto_rng_tfm(tfm)->__crt_alg->cra_rng;} static inline struct rng_tfm *crypto_rng_crt(struct crypto_rng *tfm){	return &crypto_rng_tfm(tfm)->crt_rng;} static inline void crypto_free_rng(struct crypto_rng *tfm){	crypto_free_tfm(crypto_rng_tfm(tfm));} static inline int crypto_rng_get_bytes(struct crypto_rng *tfm,				       u8 *rdata, unsigned int dlen){	return crypto_rng_crt(tfm)->rng_gen_random(tfm, rdata, dlen);} static inline int crypto_rng_reset(struct crypto_rng *tfm,				   u8 *seed, unsigned int slen){	return crypto_rng_crt(tfm)->rng_reset(tfm, seed, slen);} static inline int crypto_rng_seedsize(struct crypto_rng *tfm){	return crypto_rng_alg(tfm)->seedsize;} #endif