crypto: fips - make proc files report fips module name and version

FIPS 140-3 introduced a requirement for the FIPS module to return
information about itself, specifically a name and a version. These
values must match the values reported on FIPS certificates.

This patch adds two files to read a name and a version from:

/proc/sys/crypto/fips_name
/proc/sys/crypto/fips_version

v2: removed redundant parentheses in config entries.
v3: move FIPS_MODULE_* defines to fips.c where they are used.
v4: return utsrelease.h inclusion

Signed-off-by: Simo Sorce <[e-mail]>
Signed-off-by: Vladis Dronov <[e-mail]>
Signed-off-by: Herbert Xu <[e-mail]>

crypto/Kconfig

···
 	  certification.  You should say no unless you know what
 	  this is.
 
+config CRYPTO_FIPS_NAME
+	string "FIPS Module Name"
+	default "Linux Kernel Cryptographic API"
+	depends on CRYPTO_FIPS
+	help
+	  This option sets the FIPS Module name reported by the Crypto API via
+	  the /proc/sys/crypto/fips_name file.
+
+config CRYPTO_FIPS_CUSTOM_VERSION
+	bool "Use Custom FIPS Module Version"
+	depends on CRYPTO_FIPS
+	default n
+
+config CRYPTO_FIPS_VERSION
+	string "FIPS Module Version"
+	default "(none)"
+	depends on CRYPTO_FIPS_CUSTOM_VERSION
+	help
+	  This option provides the ability to override the FIPS Module Version.
+	  By default the KERNELRELEASE value is used.
+
 config CRYPTO_ALGAPI
 	tristate
 	select CRYPTO_ALGAPI2

crypto/fips.c

···
 #include <linux/kernel.h>
 #include <linux/sysctl.h>
 #include <linux/notifier.h>
+#include <generated/utsrelease.h>
 
 int fips_enabled;
 EXPORT_SYMBOL_GPL(fips_enabled);
···
 
 __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_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
 	},
 	{}
 };