Release 4.11 crypto/rng.c

Directory: crypto
/*
 * Cryptographic API.
 *
 * RNG operations.
 *
 * Copyright (c) 2008 Neil Horman <nhorman@tuxdriver.com>
 * Copyright (c) 2015 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 option)
 * any later version.
 *
 */

#include <linux/atomic.h>
#include <crypto/internal/rng.h>
#include <linux/err.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/random.h>
#include <linux/seq_file.h>
#include <linux/slab.h>
#include <linux/string.h>
#include <linux/cryptouser.h>
#include <linux/compiler.h>
#include <net/netlink.h>

#include "internal.h"

static DEFINE_MUTEX(crypto_default_rng_lock);

struct crypto_rng *crypto_default_rng;

EXPORT_SYMBOL_GPL(crypto_default_rng);

static int crypto_default_rng_refcnt;



static inline struct crypto_rng *__crypto_rng_cast(struct crypto_tfm *tfm)
{
	return container_of(tfm, struct crypto_rng, base);
}

Contributors
Person Tokens Prop Commits CommitProp
Herbert Xu 25 100.00% 1 100.00%
Total 25 100.00% 1 100.00%



int crypto_rng_reset(struct crypto_rng *tfm, const u8 *seed, unsigned int slen)
{
	u8 *buf = NULL;
	int err;

	if (!seed && slen) {
		buf = kmalloc(slen, GFP_KERNEL);
		if (!buf)
			return -ENOMEM;

		get_random_bytes(buf, slen);
		seed = buf;
	}

	err = crypto_rng_alg(tfm)->seed(tfm, seed, slen);

	kzfree(buf);
	return err;
}
Contributors
Person Tokens Prop Commits CommitProp
Neil Horman 76 84.44% 1 25.00%
Herbert Xu 14 15.56% 3 75.00%
Total 90 100.00% 4 100.00%


EXPORT_SYMBOL_GPL(crypto_rng_reset);



static int crypto_rng_init_tfm(struct crypto_tfm *tfm)
{
	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Neil Horman 9 64.29% 1 33.33%
Herbert Xu 5 35.71% 2 66.67%
Total 14 100.00% 3 100.00%



static unsigned int seedsize(struct crypto_alg *alg)
{
	struct rng_alg *ralg = container_of(alg, struct rng_alg, base);

	return ralg->seedsize;
}

Contributors
Person Tokens Prop Commits CommitProp
Herbert Xu 32 100.00% 1 100.00%
Total 32 100.00% 1 100.00%

#ifdef CONFIG_NET


static int crypto_rng_report(struct sk_buff *skb, struct crypto_alg *alg)
{
	struct crypto_report_rng rrng;

	strncpy(rrng.type, "rng", sizeof(rrng.type));

	rrng.seedsize = seedsize(alg);

	if (nla_put(skb, CRYPTOCFGA_REPORT_RNG,
		    sizeof(struct crypto_report_rng), &rrng))
		goto nla_put_failure;
	return 0;

nla_put_failure:
	return -EMSGSIZE;
}
Contributors
Person Tokens Prop Commits CommitProp
Steffen Klassert 57 76.00% 1 25.00%
Mathias Krause 8 10.67% 1 25.00%
David S. Miller 7 9.33% 1 25.00%
Herbert Xu 3 4.00% 1 25.00%
Total 75 100.00% 4 100.00%

#else


static int crypto_rng_report(struct sk_buff *skb, struct crypto_alg *alg)
{
	return -ENOSYS;
}
Contributors
Person Tokens Prop Commits CommitProp
Herbert Xu 20 100.00% 1 100.00%
Total 20 100.00% 1 100.00%

#endif

static void crypto_rng_show(struct seq_file *m, struct crypto_alg *alg)
	__maybe_unused;


static void crypto_rng_show(struct seq_file *m, struct crypto_alg *alg)
{
	seq_printf(m, "type         : rng\n");
	seq_printf(m, "seedsize     : %u\n", seedsize(alg));
}

Contributors
Person Tokens Prop Commits CommitProp
Neil Horman 32 91.43% 1 50.00%
Herbert Xu 3 8.57% 1 50.00%
Total 35 100.00% 2 100.00%


static const struct crypto_type crypto_rng_type = {
	.extsize = crypto_alg_extsize,
	.init_tfm = crypto_rng_init_tfm,
#ifdef CONFIG_PROC_FS
	.show = crypto_rng_show,
#endif
	.report = crypto_rng_report,
	.maskclear = ~CRYPTO_ALG_TYPE_MASK,
	.maskset = CRYPTO_ALG_TYPE_MASK,
	.type = CRYPTO_ALG_TYPE_RNG,
	.tfmsize = offsetof(struct crypto_rng, base),
};



struct crypto_rng *crypto_alloc_rng(const char *alg_name, u32 type, u32 mask)
{
	return crypto_alloc_tfm(alg_name, &crypto_rng_type, type, mask);
}
Contributors
Person Tokens Prop Commits CommitProp
Herbert Xu 31 100.00% 1 100.00%
Total 31 100.00% 1 100.00%


EXPORT_SYMBOL_GPL(crypto_alloc_rng);



int crypto_get_default_rng(void)
{
	struct crypto_rng *rng;
	int err;

	mutex_lock(&crypto_default_rng_lock);
	if (!crypto_default_rng) {
		rng = crypto_alloc_rng("stdrng", 0, 0);
		err = PTR_ERR(rng);
		if (IS_ERR(rng))
			goto unlock;

		err = crypto_rng_reset(rng, NULL, crypto_rng_seedsize(rng));
		if (err) {
			crypto_free_rng(rng);
			goto unlock;
		}

		crypto_default_rng = rng;
	}

	crypto_default_rng_refcnt++;
	err = 0;

unlock:
	mutex_unlock(&crypto_default_rng_lock);

	return err;
}
Contributors
Person Tokens Prop Commits CommitProp
Neil Horman 106 100.00% 1 100.00%
Total 106 100.00% 1 100.00%


EXPORT_SYMBOL_GPL(crypto_get_default_rng);



void crypto_put_default_rng(void)
{
	mutex_lock(&crypto_default_rng_lock);
	crypto_default_rng_refcnt--;
	mutex_unlock(&crypto_default_rng_lock);
}
Contributors
Person Tokens Prop Commits CommitProp
Neil Horman 12 54.55% 1 50.00%
Herbert Xu 10 45.45% 1 50.00%
Total 22 100.00% 2 100.00%


EXPORT_SYMBOL_GPL(crypto_put_default_rng);

#if defined(CONFIG_CRYPTO_RNG) || defined(CONFIG_CRYPTO_RNG_MODULE)


int crypto_del_default_rng(void)
{
	int err = -EBUSY;

	mutex_lock(&crypto_default_rng_lock);
	if (crypto_default_rng_refcnt)
		goto out;

	crypto_free_rng(crypto_default_rng);
	crypto_default_rng = NULL;

	err = 0;

out:
	mutex_unlock(&crypto_default_rng_lock);

	return err;
}
Contributors
Person Tokens Prop Commits CommitProp
Herbert Xu 30 60.00% 1 50.00%
Neil Horman 20 40.00% 1 50.00%
Total 50 100.00% 2 100.00%


EXPORT_SYMBOL_GPL(crypto_del_default_rng);
#endif



int crypto_register_rng(struct rng_alg *alg)
{
	struct crypto_alg *base = &alg->base;

	if (alg->seedsize > PAGE_SIZE / 8)
		return -EINVAL;

	base->cra_type = &crypto_rng_type;
	base->cra_flags &= ~CRYPTO_ALG_TYPE_MASK;
	base->cra_flags |= CRYPTO_ALG_TYPE_RNG;

	return crypto_register_alg(base);
}
Contributors
Person Tokens Prop Commits CommitProp
Herbert Xu 60 100.00% 1 100.00%
Total 60 100.00% 1 100.00%


EXPORT_SYMBOL_GPL(crypto_register_rng);



void crypto_unregister_rng(struct rng_alg *alg)
{
	crypto_unregister_alg(&alg->base);
}
Contributors
Person Tokens Prop Commits CommitProp
Herbert Xu 18 100.00% 1 100.00%
Total 18 100.00% 1 100.00%


EXPORT_SYMBOL_GPL(crypto_unregister_rng);



int crypto_register_rngs(struct rng_alg *algs, int count)
{
	int i, ret;

	for (i = 0; i < count; i++) {
		ret = crypto_register_rng(algs + i);
		if (ret)
			goto err;
	}

	return 0;

err:
	for (--i; i >= 0; --i)
		crypto_unregister_rng(algs + i);

	return ret;
}
Contributors
Person Tokens Prop Commits CommitProp
Herbert Xu 76 100.00% 1 100.00%
Total 76 100.00% 1 100.00%


EXPORT_SYMBOL_GPL(crypto_register_rngs);



void crypto_unregister_rngs(struct rng_alg *algs, int count)
{
	int i;

	for (i = count - 1; i >= 0; --i)
		crypto_unregister_rng(algs + i);
}
Contributors
Person Tokens Prop Commits CommitProp
Herbert Xu 38 100.00% 1 100.00%
Total 38 100.00% 1 100.00%


EXPORT_SYMBOL_GPL(crypto_unregister_rngs);

MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Random Number Generator");
Overall Contributors
Person Tokens Prop Commits CommitProp
Herbert Xu 457 50.61% 8 50.00%
Neil Horman 346 38.32% 1 6.25%
Steffen Klassert 68 7.53% 1 6.25%
Gideon Israel Dsouza 12 1.33% 1 6.25%
Mathias Krause 8 0.89% 1 6.25%
David S. Miller 7 0.78% 1 6.25%
Tejun Heo 3 0.33% 1 6.25%
Christian Kujau 1 0.11% 1 6.25%
Arun Sharma 1 0.11% 1 6.25%
Total 903 100.00% 16 100.00%
Directory: crypto

Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.
Created with cregit.
Person	Tokens	Prop	Commits	CommitProp
Herbert Xu	25	100.00%	1	100.00%
Total	25	100.00%	1	100.00%
cregit-Linux how code gets into the kernel

Release 4.11 crypto/rng.c

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Overall Contributors
