| 1 | |
| 2 | |
| 3 | * FIPS 200 support.
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| 4 | *
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| 5 | * Copyright (c) 2008 Neil Horman <[email protected]>
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| 6 |
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| 7 |
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| 8 | #include <linux/export.h>
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| 9 | #include <linux/fips.h>
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| 10 | #include <linux/init.h>
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| 11 | #include <linux/module.h>
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| 12 | #include <linux/kernel.h>
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| 13 | #include <linux/sysctl.h>
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| 14 | #include <linux/notifier.h>
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| 15 | #include <linux/string_choices.h>
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| 16 | #include <generated/utsrelease.h>
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| 17 |
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| 18 | int fips_enabled;
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| 19 | EXPORT_SYMBOL_GPL(fips_enabled);
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| 20 |
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| 21 | ATOMIC_NOTIFIER_HEAD(fips_fail_notif_chain);
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| 22 | EXPORT_SYMBOL_GPL(fips_fail_notif_chain);
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| 23 |
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| 24 |
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| 25 | static int __init fips_enable(char *str)
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| 26 | {
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| 27 | if (kstrtoint(str, 0, &fips_enabled))
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| 28 | return 0;
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| 29 |
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| 30 | fips_enabled = !!fips_enabled;
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| 31 | pr_info("fips mode: %s\n", str_enabled_disabled(fips_enabled));
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| 32 | return 1;
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| 33 | }
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| 34 |
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| 35 | __setup("fips=", fips_enable);
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| 36 |
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| 37 | #define FIPS_MODULE_NAME CONFIG_CRYPTO_FIPS_NAME
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| 38 | #ifdef CONFIG_CRYPTO_FIPS_CUSTOM_VERSION
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| 39 | #define FIPS_MODULE_VERSION CONFIG_CRYPTO_FIPS_VERSION
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| 40 | #else
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| 41 | #define FIPS_MODULE_VERSION UTS_RELEASE
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| 42 | #endif
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| 43 |
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| 44 | static char fips_name[] = FIPS_MODULE_NAME;
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| 45 | static char fips_version[] = FIPS_MODULE_VERSION;
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| 46 |
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| 47 | static const struct ctl_table crypto_sysctl_table[] = {
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| 48 | {
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| 49 | .procname = "fips_enabled",
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| 50 | .data = &fips_enabled,
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| 51 | .maxlen = sizeof(int),
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| 52 | .mode = 0444,
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| 53 | .proc_handler = proc_dointvec
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| 54 | },
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| 55 | {
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| 56 | .procname = "fips_name",
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| 57 | .data = &fips_name,
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| 58 | .maxlen = 64,
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| 59 | .mode = 0444,
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| 60 | .proc_handler = proc_dostring
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| 61 | },
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| 62 | {
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| 63 | .procname = "fips_version",
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| 64 | .data = &fips_version,
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| 65 | .maxlen = 64,
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| 66 | .mode = 0444,
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| 67 | .proc_handler = proc_dostring
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| 68 | },
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| 69 | };
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| 70 |
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| 71 | static struct ctl_table_header *crypto_sysctls;
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| 72 |
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| 73 | static void crypto_proc_fips_init(void)
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| 74 | {
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| 75 | crypto_sysctls = register_sysctl("crypto", crypto_sysctl_table);
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| 76 | }
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| 77 |
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| 78 | static void crypto_proc_fips_exit(void)
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| 79 | {
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| 80 | unregister_sysctl_table(crypto_sysctls);
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| 81 | }
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| 82 |
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| 83 | void fips_fail_notify(void)
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| 84 | {
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| 85 | if (fips_enabled)
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| 86 | atomic_notifier_call_chain(&fips_fail_notif_chain, 0, NULL);
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| 87 | }
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| 88 | EXPORT_SYMBOL_GPL(fips_fail_notify);
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| 89 |
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| 90 | static int __init fips_init(void)
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| 91 | {
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| 92 | crypto_proc_fips_init();
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| 93 | return 0;
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| 94 | }
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| 95 |
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| 96 | static void __exit fips_exit(void)
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| 97 | {
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| 98 | crypto_proc_fips_exit();
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| 99 | }
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| 100 |
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| 101 | module_init(fips_init);
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| 102 | module_exit(fips_exit);
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