[linux-block.git] / crypto / fips.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * FIPS 200 support.
 *
 * Copyright (c) 2008 Neil Horman <nhorman@tuxdriver.com>
 */

#include <linux/export.h>
#include <linux/fips.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/sysctl.h>
#include <linux/notifier.h>
#include <generated/utsrelease.h>

int fips_enabled;
EXPORT_SYMBOL_GPL(fips_enabled);

ATOMIC_NOTIFIER_HEAD(fips_fail_notif_chain);
EXPORT_SYMBOL_GPL(fips_fail_notif_chain);

/* Process kernel command-line parameter at boot time. fips=0 or fips=1 */
static int fips_enable(char *str)
{
	fips_enabled = !!simple_strtol(str, NULL, 0);
	printk(KERN_INFO "fips mode: %s\n",
		fips_enabled ? "enabled" : "disabled");
	return 1;
}

__setup("fips=", fips_enable);

#define FIPS_MODULE_NAME CONFIG_CRYPTO_FIPS_NAME
#ifdef CONFIG_CRYPTO_FIPS_CUSTOM_VERSION
#define FIPS_MODULE_VERSION CONFIG_CRYPTO_FIPS_VERSION
#else
#define FIPS_MODULE_VERSION UTS_RELEASE
#endif

static char fips_name[] = FIPS_MODULE_NAME;
static char fips_version[] = FIPS_MODULE_VERSION;

static struct ctl_table crypto_sysctl_table[] = {
	{
		.procname	= "fips_enabled",
		.data		= &fips_enabled,
		.maxlen		= sizeof(int),
		.mode		= 0444,
		.proc_handler	= proc_dointvec
	},
	{
		.procname	= "fips_name",
		.data		= &fips_name,
		.maxlen		= 64,
		.mode		= 0444,
		.proc_handler	= proc_dostring
	},
	{
		.procname	= "fips_version",
		.data		= &fips_version,
		.maxlen		= 64,
		.mode		= 0444,
		.proc_handler	= proc_dostring
	},
	{}
};

static struct ctl_table crypto_dir_table[] = {
	{
		.procname       = "crypto",
		.mode           = 0555,
		.child          = crypto_sysctl_table
	},
	{}
};

static struct ctl_table_header *crypto_sysctls;

static void crypto_proc_fips_init(void)
{
	crypto_sysctls = register_sysctl_table(crypto_dir_table);
}

static void crypto_proc_fips_exit(void)
{
	unregister_sysctl_table(crypto_sysctls);
}

void fips_fail_notify(void)
{
	if (fips_enabled)
		atomic_notifier_call_chain(&fips_fail_notif_chain, 0, NULL);
}
EXPORT_SYMBOL_GPL(fips_fail_notify);

static int __init fips_init(void)
{
	crypto_proc_fips_init();
	return 0;
}

static void __exit fips_exit(void)
{
	crypto_proc_fips_exit();
}

subsys_initcall(fips_init);
module_exit(fips_exit);
Commit	Line	Data
2874c5fd	1	// SPDX-License-Identifier: GPL-2.0-or-later
ccb778e1 NH	2	/*
	3	* FIPS 200 support.
	4	*
	5	* Copyright (c) 2008 Neil Horman <nhorman@tuxdriver.com>
ccb778e1 NH	6	*/
ccb778e1 NH	7
76450f93 HX	8	#include <linux/export.h>
	9	#include <linux/fips.h>
	10	#include <linux/init.h>
94072cb2	11	#include <linux/module.h>
76450f93	12	#include <linux/kernel.h>
94072cb2	13	#include <linux/sysctl.h>
9552389c	14	#include <linux/notifier.h>
5a44749f	15	#include <generated/utsrelease.h>
ccb778e1 NH	16
	17	int fips_enabled;
	18	EXPORT_SYMBOL_GPL(fips_enabled);
	19
9552389c GBY	20	ATOMIC_NOTIFIER_HEAD(fips_fail_notif_chain);
	21	EXPORT_SYMBOL_GPL(fips_fail_notif_chain);
	22
ccb778e1 NH	23	/* Process kernel command-line parameter at boot time. fips=0 or fips=1 */
	24	static int fips_enable(char *str)
	25	{
	26	fips_enabled = !!simple_strtol(str, NULL, 0);
	27	printk(KERN_INFO "fips mode: %s\n",
	28	fips_enabled ? "enabled" : "disabled");
	29	return 1;
	30	}
	31
	32	__setup("fips=", fips_enable);
94072cb2	33
5a44749f VD	34	#define FIPS_MODULE_NAME CONFIG_CRYPTO_FIPS_NAME
	35	#ifdef CONFIG_CRYPTO_FIPS_CUSTOM_VERSION
	36	#define FIPS_MODULE_VERSION CONFIG_CRYPTO_FIPS_VERSION
	37	#else
	38	#define FIPS_MODULE_VERSION UTS_RELEASE
	39	#endif
	40
	41	static char fips_name[] = FIPS_MODULE_NAME;
	42	static char fips_version[] = FIPS_MODULE_VERSION;
	43
94072cb2 HX	44	static struct ctl_table crypto_sysctl_table[] = {
94072cb2 HX	45	{
5a44749f VD	46	.procname = "fips_enabled",
	47	.data = &fips_enabled,
	48	.maxlen = sizeof(int),
	49	.mode = 0444,
	50	.proc_handler = proc_dointvec
	51	},
	52	{
	53	.procname = "fips_name",
	54	.data = &fips_name,
	55	.maxlen = 64,
	56	.mode = 0444,
	57	.proc_handler = proc_dostring
	58	},
	59	{
	60	.procname = "fips_version",
	61	.data = &fips_version,
	62	.maxlen = 64,
	63	.mode = 0444,
	64	.proc_handler = proc_dostring
94072cb2 HX	65	},
	66	{}
	67	};
	68
	69	static struct ctl_table crypto_dir_table[] = {
	70	{
	71	.procname = "crypto",
	72	.mode = 0555,
	73	.child = crypto_sysctl_table
	74	},
	75	{}
	76	};
	77
	78	static struct ctl_table_header *crypto_sysctls;
	79
	80	static void crypto_proc_fips_init(void)
	81	{
	82	crypto_sysctls = register_sysctl_table(crypto_dir_table);
	83	}
	84
	85	static void crypto_proc_fips_exit(void)
	86	{
	87	unregister_sysctl_table(crypto_sysctls);
	88	}
	89
9552389c GBY	90	void fips_fail_notify(void)
	91	{
	92	if (fips_enabled)
	93	atomic_notifier_call_chain(&fips_fail_notif_chain, 0, NULL);
	94	}
	95	EXPORT_SYMBOL_GPL(fips_fail_notify);
	96
94072cb2 HX	97	static int __init fips_init(void)
	98	{
	99	crypto_proc_fips_init();
	100	return 0;
	101	}
	102
	103	static void __exit fips_exit(void)
	104	{
	105	crypto_proc_fips_exit();
	106	}
	107
c4741b23	108	subsys_initcall(fips_init);
94072cb2	109	module_exit(fips_exit);