/* * RNG implementation using standard kernel RNG. * * Copyright (c) 2008 Herbert Xu <herbert@gondor.apana.org.au> * * 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 * any later version. * */ #include <crypto/internal/rng.h>#include <linux/err.h>#include <linux/init.h>#include <linux/module.h>#include <linux/random.h> static int krng_get_random(struct crypto_rng *tfm, u8 *rdata, unsigned int dlen){	get_random_bytes(rdata, dlen);	return 0;} static int krng_reset(struct crypto_rng *tfm, u8 *seed, unsigned int slen){	return 0;} static struct crypto_alg krng_alg = {	.cra_name		= "stdrng",	.cra_driver_name	= "krng",	.cra_priority		= 200,	.cra_flags		= CRYPTO_ALG_TYPE_RNG,	.cra_ctxsize		= 0,	.cra_type		= &crypto_rng_type,	.cra_module		= THIS_MODULE,	.cra_list		= LIST_HEAD_INIT(krng_alg.cra_list),	.cra_u			= {		.rng = {			.rng_make_random	= krng_get_random,			.rng_reset		= krng_reset,			.seedsize		= 0,		}	}};  /* Module initalization */static int __init krng_mod_init(void){	return crypto_register_alg(&krng_alg);} static void __exit krng_mod_fini(void){	crypto_unregister_alg(&krng_alg);	return;} module_init(krng_mod_init);module_exit(krng_mod_fini); MODULE_LICENSE("GPL");MODULE_DESCRIPTION("Kernel Random Number Generator");MODULE_ALIAS("stdrng");