Linux kernel mirror (for testing)
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1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * FIPS 200 support.
4 *
5 * Copyright (c) 2008 Neil Horman <nhorman@tuxdriver.com>
6 */
7
8#include <linux/export.h>
9#include <linux/fips.h>
10#include <linux/init.h>
11#include <linux/module.h>
12#include <linux/kernel.h>
13#include <linux/sysctl.h>
14#include <linux/notifier.h>
15#include <generated/utsrelease.h>
16
17int fips_enabled;
18EXPORT_SYMBOL_GPL(fips_enabled);
19
20ATOMIC_NOTIFIER_HEAD(fips_fail_notif_chain);
21EXPORT_SYMBOL_GPL(fips_fail_notif_chain);
22
23/* Process kernel command-line parameter at boot time. fips=0 or fips=1 */
24static 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);
33
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
41static char fips_name[] = FIPS_MODULE_NAME;
42static char fips_version[] = FIPS_MODULE_VERSION;
43
44static struct ctl_table crypto_sysctl_table[] = {
45 {
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
65 },
66 {}
67};
68
69static struct ctl_table crypto_dir_table[] = {
70 {
71 .procname = "crypto",
72 .mode = 0555,
73 .child = crypto_sysctl_table
74 },
75 {}
76};
77
78static struct ctl_table_header *crypto_sysctls;
79
80static void crypto_proc_fips_init(void)
81{
82 crypto_sysctls = register_sysctl_table(crypto_dir_table);
83}
84
85static void crypto_proc_fips_exit(void)
86{
87 unregister_sysctl_table(crypto_sysctls);
88}
89
90void fips_fail_notify(void)
91{
92 if (fips_enabled)
93 atomic_notifier_call_chain(&fips_fail_notif_chain, 0, NULL);
94}
95EXPORT_SYMBOL_GPL(fips_fail_notify);
96
97static int __init fips_init(void)
98{
99 crypto_proc_fips_init();
100 return 0;
101}
102
103static void __exit fips_exit(void)
104{
105 crypto_proc_fips_exit();
106}
107
108subsys_initcall(fips_init);
109module_exit(fips_exit);