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Tip revision: 3c0eee3fe6a3a1c745379547c7e7c904aa64f6d5 authored by Linus Torvalds on 05 January 2011, 00:50:19 UTC
Linux 2.6.37
Linux 2.6.37
Tip revision: 3c0eee3
rng.h
/*
* 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