62 lines
1.3 KiB
C
62 lines
1.3 KiB
C
/*
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* RNG implementation using standard kernel RNG.
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*
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* Copyright (c) 2008 Herbert Xu <herbert@gondor.apana.org.au>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* any later version.
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*
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*/
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#include <crypto/internal/rng.h>
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#include <linux/err.h>
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/random.h>
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static int krng_generate(struct crypto_rng *tfm,
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const u8 *src, unsigned int slen,
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u8 *rdata, unsigned int dlen)
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{
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get_random_bytes(rdata, dlen);
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return 0;
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}
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static int krng_seed(struct crypto_rng *tfm, const u8 *seed, unsigned int slen)
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{
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return 0;
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}
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static struct rng_alg krng_alg = {
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.generate = krng_generate,
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.seed = krng_seed,
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.base = {
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.cra_name = "stdrng",
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.cra_driver_name = "krng",
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.cra_priority = 200,
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.cra_module = THIS_MODULE,
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}
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};
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/* Module initalization */
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static int __init krng_mod_init(void)
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{
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return crypto_register_rng(&krng_alg);
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}
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static void __exit krng_mod_fini(void)
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{
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crypto_unregister_rng(&krng_alg);
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}
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module_init(krng_mod_init);
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module_exit(krng_mod_fini);
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MODULE_LICENSE("GPL");
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MODULE_DESCRIPTION("Kernel Random Number Generator");
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MODULE_ALIAS_CRYPTO("stdrng");
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MODULE_ALIAS_CRYPTO("krng");
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