#
# (C) 2021 FCNT LIMITED
#
# Security configuration
#

menu "Security options"

source security/keys/Kconfig

config SECURITY_DMESG_RESTRICT
	bool "Restrict unprivileged access to the kernel syslog"
	default n
	help
	  This enforces restrictions on unprivileged users reading the kernel
	  syslog via dmesg(8).

	  If this option is not selected, no restrictions will be enforced
	  unless the dmesg_restrict sysctl is explicitly set to (1).

	  If you are unsure how to answer this question, answer N.

config SECURITY
	bool "Enable different security models"
	depends on SYSFS
	depends on MULTIUSER
	help
	  This allows you to choose different security modules to be
	  configured into your kernel.

	  If this option is not selected, the default Linux security
	  model will be used.

	  If you are unsure how to answer this question, answer N.

config SECURITY_WRITABLE_HOOKS
	depends on SECURITY
	bool
	default n

config SECURITYFS
	bool "Enable the securityfs filesystem"
	help
	  This will build the securityfs filesystem.  It is currently used by
	  the TPM bios character driver and IMA, an integrity provider.  It is
	  not used by SELinux or SMACK.

	  If you are unsure how to answer this question, answer N.

config SECURITY_NETWORK
	bool "Socket and Networking Security Hooks"
	depends on SECURITY
	help
	  This enables the socket and networking security hooks.
	  If enabled, a security module can use these hooks to
	  implement socket and networking access controls.
	  If you are unsure how to answer this question, answer N.

config PAGE_TABLE_ISOLATION
	bool "Remove the kernel mapping in user mode"
	default y
	depends on (X86_64 || X86_PAE) && !UML
	help
	  This feature reduces the number of hardware side channels by
	  ensuring that the majority of kernel addresses are not mapped
	  into userspace.

	  See Documentation/x86/pti.txt for more details.

config SECURITY_INFINIBAND
	bool "Infiniband Security Hooks"
	depends on SECURITY && INFINIBAND
	help
	  This enables the Infiniband security hooks.
	  If enabled, a security module can use these hooks to
	  implement Infiniband access controls.
	  If you are unsure how to answer this question, answer N.

config SECURITY_NETWORK_XFRM
	bool "XFRM (IPSec) Networking Security Hooks"
	depends on XFRM && SECURITY_NETWORK
	help
	  This enables the XFRM (IPSec) networking security hooks.
	  If enabled, a security module can use these hooks to
	  implement per-packet access controls based on labels
	  derived from IPSec policy.  Non-IPSec communications are
	  designated as unlabelled, and only sockets authorized
	  to communicate unlabelled data can send without using
	  IPSec.
	  If you are unsure how to answer this question, answer N.

config SECURITY_PATH
	bool "Security hooks for pathname based access control"
	depends on SECURITY
	help
	  This enables the security hooks for pathname based access control.
	  If enabled, a security module can use these hooks to
	  implement pathname based access controls.
	  If you are unsure how to answer this question, answer N.

config INTEL_TXT
	bool "Enable Intel(R) Trusted Execution Technology (Intel(R) TXT)"
	depends on HAVE_INTEL_TXT
	help
	  This option enables support for booting the kernel with the
	  Trusted Boot (tboot) module. This will utilize
	  Intel(R) Trusted Execution Technology to perform a measured launch
	  of the kernel. If the system does not support Intel(R) TXT, this
	  will have no effect.

	  Intel TXT will provide higher assurance of system configuration and
	  initial state as well as data reset protection.  This is used to
	  create a robust initial kernel measurement and verification, which
	  helps to ensure that kernel security mechanisms are functioning
	  correctly. This level of protection requires a root of trust outside
	  of the kernel itself.

	  Intel TXT also helps solve real end user concerns about having
	  confidence that their hardware is running the VMM or kernel that
	  it was configured with, especially since they may be responsible for
	  providing such assurances to VMs and services running on it.

	  See <http://www.intel.com/technology/security/> for more information
	  about Intel(R) TXT.
	  See <http://tboot.sourceforge.net> for more information about tboot.
	  See Documentation/intel_txt.txt for a description of how to enable
	  Intel TXT support in a kernel boot.

	  If you are unsure as to whether this is required, answer N.

config LSM_MMAP_MIN_ADDR
	int "Low address space for LSM to protect from user allocation"
	depends on SECURITY && SECURITY_SELINUX
	default 32768 if ARM || (ARM64 && COMPAT)
	default 65536
	help
	  This is the portion of low virtual memory which should be protected
	  from userspace allocation.  Keeping a user from writing to low pages
	  can help reduce the impact of kernel NULL pointer bugs.

	  For most ia64, ppc64 and x86 users with lots of address space
	  a value of 65536 is reasonable and should cause no problems.
	  On arm and other archs it should not be higher than 32768.
	  Programs which use vm86 functionality or have some need to map
	  this low address space will need the permission specific to the
	  systems running LSM.

config HAVE_HARDENED_USERCOPY_ALLOCATOR
	bool
	help
	  The heap allocator implements __check_heap_object() for
	  validating memory ranges against heap object sizes in
	  support of CONFIG_HARDENED_USERCOPY.

config HARDENED_USERCOPY
	bool "Harden memory copies between kernel and userspace"
	depends on HAVE_HARDENED_USERCOPY_ALLOCATOR
	imply STRICT_DEVMEM
	help
	  This option checks for obviously wrong memory regions when
	  copying memory to/from the kernel (via copy_to_user() and
	  copy_from_user() functions) by rejecting memory ranges that
	  are larger than the specified heap object, span multiple
	  separately allocated pages, are not on the process stack,
	  or are part of the kernel text. This kills entire classes
	  of heap overflow exploits and similar kernel memory exposures.

config HARDENED_USERCOPY_FALLBACK
	bool "Allow usercopy whitelist violations to fallback to object size"
	depends on HARDENED_USERCOPY
	default y
	help
	  This is a temporary option that allows missing usercopy whitelists
	  to be discovered via a WARN() to the kernel log, instead of
	  rejecting the copy, falling back to non-whitelisted hardened
	  usercopy that checks the slab allocation size instead of the
	  whitelist size. This option will be removed once it seems like
	  all missing usercopy whitelists have been identified and fixed.
	  Booting with "slab_common.usercopy_fallback=Y/N" can change
	  this setting.

config HARDENED_USERCOPY_PAGESPAN
	bool "Refuse to copy allocations that span multiple pages"
	depends on HARDENED_USERCOPY
	depends on EXPERT
	help
	  When a multi-page allocation is done without __GFP_COMP,
	  hardened usercopy will reject attempts to copy it. There are,
	  however, several cases of this in the kernel that have not all
	  been removed. This config is intended to be used only while
	  trying to find such users.

config FORTIFY_SOURCE
	bool "Harden common str/mem functions against buffer overflows"
	depends on ARCH_HAS_FORTIFY_SOURCE
	help
	  Detect overflows of buffers in common string and memory functions
	  where the compiler can determine and validate the buffer sizes.

config STATIC_USERMODEHELPER
	bool "Force all usermode helper calls through a single binary"
	help
	  By default, the kernel can call many different userspace
	  binary programs through the "usermode helper" kernel
	  interface.  Some of these binaries are statically defined
	  either in the kernel code itself, or as a kernel configuration
	  option.  However, some of these are dynamically created at
	  runtime, or can be modified after the kernel has started up.
	  To provide an additional layer of security, route all of these
	  calls through a single executable that can not have its name
	  changed.

	  Note, it is up to this single binary to then call the relevant
	  "real" usermode helper binary, based on the first argument
	  passed to it.  If desired, this program can filter and pick
	  and choose what real programs are called.

	  If you wish for all usermode helper programs are to be
	  disabled, choose this option and then set
	  STATIC_USERMODEHELPER_PATH to an empty string.

config STATIC_USERMODEHELPER_PATH
	string "Path to the static usermode helper binary"
	depends on STATIC_USERMODEHELPER
	default "/sbin/usermode-helper"
	help
	  The binary called by the kernel when any usermode helper
	  program is wish to be run.  The "real" application's name will
	  be in the first argument passed to this program on the command
	  line.

	  If you wish for all usermode helper programs to be disabled,
	  specify an empty string here (i.e. "").

source security/selinux/Kconfig
source security/smack/Kconfig
source security/tomoyo/Kconfig
source security/apparmor/Kconfig
source security/loadpin/Kconfig
source security/yama/Kconfig

source security/integrity/Kconfig

config SECURITY_FJSEC
	bool "FJSEC LSM Support"
	depends on SECURITY
	help
	  This is a FJSEC LSM module.

	  If you are unsure how to answer this question, answer N.

config SECURITY_FJSEC_AC_SECURE_STORAGE
	bool "Enable access control to secure storage."
	depends on SECURITY_FJSEC
	default y

config SECURITY_FJSEC_AC_KITTING
	bool "Enable access control to Kitting directory and partition."
	depends on SECURITY_FJSEC
	default n

config SECURITY_FJSEC_DISK_DEV_PATH
	string "block device path for main disk"
	depends on SECURITY_FJSEC
	default "/dev/block/mmcblk0"

config SECURITY_FJSEC_SYSTEM_DIR_PATH
	string "system directory PATH"
	depends on SECURITY_FJSEC
	default "/system/"

config SECURITY_FJSEC_SECURE_STORAGE_DIR_PATH
	string "secure storage PATH"
	depends on SECURITY_FJSEC_AC_SECURE_STORAGE
	default "/mnt/vendor/persist/data/"

config SECURITY_FJSEC_SECURE_STORAGE_MOUNT_POINT_PATH
	string "secure storage mount point PATH"
	depends on SECURITY_FJSEC_AC_SECURE_STORAGE
	default "/mnt/vendor/persist/"

config SECURITY_FJSEC_KITTING_DIR_PATH
	string "kitting directory PATH"
	depends on SECURITY_FJSEC_AC_KITTING
	default "/mnt/kitting/"

config SECURITY_FJSEC_VENDOR_DIR_PATH
	string "vendor directory PATH"
	depends on SECURITY_FJSEC
	default "/vendor/"

config SECURITY_FJSEC_VENDOR_DEV_PATH
	string "block device path for /vendor/"
	depends on SECURITY_FJSEC
	default "/dev/block/mmcblk0p28"

config SECURITY_FJSEC_SYSTEM_DEV_PATH
	string "block device path for /system/"
	depends on SECURITY_FJSEC
	default "/dev/block/mmcblk0p28"

config SECURITY_FJSEC_SECURE_STORAGE_DEV_PATH
	string "block device path for secure storage"
	depends on SECURITY_FJSEC_AC_SECURE_STORAGE
	default "/dev/block/mmcblk0p9"

config SECURITY_FJSEC_KITTING_DEV_PATH
	string "block device path for /kitting/"
	depends on SECURITY_FJSEC_AC_KITTING
	default "/dev/block/by-name/kitting"

config SECURITY_FJSEC_DM_DEV_PATH
	string "block device path for device-mapper feature"
	depends on SECURITY_FJSEC
	default "/dev/block/dm-"

config SECURITY_FJSEC_SYSTEM_AS_ROOT
	bool "device supports system_as_root"
	depends on SECURITY_FJSEC
	default n

config SECURITY_FJSEC_FELICA_DEV_PATH
	string "device path for FeliCa"
	depends on SECURITY_FJSEC
	default "/dev/nq-nci"

config SECURITY_FJSEC_FELICA_DEV2_PATH
	string "device path for FeliCa"
	depends on SECURITY_FJSEC
	default "/dev/felica"

config SECURITY_FJSEC_NFC_DEV_PATH
	string "device path for NFC"
	depends on SECURITY_FJSEC
	default "/dev/snfc_uart"

config SECURITY_FJSEC_PROTECT_CHROOT
	bool "Enable fjsec_path_chroot()"
	depends on SECURITY_FJSEC && SECURITY_PATH
	default y

config SECURITY_FJSEC_CHROOT_PATH
	string "chroot() allow PATH"
	depends on SECURITY_FJSEC && SECURITY_PATH && SECURITY_FJSEC_PROTECT_CHROOT
	default ""
	help
	  This is a list of paths to allow chroot()
	  For example "/chroot/:/security/"

config SECURITY_FJSEC_SECURE_STORAGE_ACCESS_PROCESS_NAME
	string "Accessible process name to SFS"
	depends on SECURITY_FJSEC_AC_SECURE_STORAGE
	default "qseecomd"

config SECURITY_FJSEC_SECURE_STORAGE_ACCESS_PROCESS_PATH
	string "Accessible process path to SFS"
	depends on SECURITY_FJSEC_AC_SECURE_STORAGE
	default "/vendor/bin/qseecomd"

config SECURITY_FJSEC_KEYMASTER_PROCESS_NAME
	string "Accessible process name to SFS"
	depends on SECURITY_FJSEC_AC_SECURE_STORAGE
	default "Keymasterkey_provd"

config SECURITY_FJSEC_KEYMASTER_PROCESS_PATH
	string "Accessible process path to SFS"
	depends on SECURITY_FJSEC_AC_SECURE_STORAGE
	default "/system/bin/Keymasterkey_provd"

config SECURITY_FJSEC_KMINSTALL_PROCESS_NAME
	string "Accessible process name to SFS"
	depends on SECURITY_FJSEC_AC_SECURE_STORAGE
	default "KmInstallKeybox"

config SECURITY_FJSEC_KMINSTALL_PROCESS_PATH
	string "Accessible process path to SFS"
	depends on SECURITY_FJSEC_AC_SECURE_STORAGE
	default "/vendor/bin/KmInstallKeybox"

config SECURITY_FJSEC_FOTA_MODE_ACCESS_PROCESS_NAME
	string "Accessible process name to /system/, /sst/ in FOTA mode"
	depends on SECURITY_FJSEC
	default "recovery"

config SECURITY_FJSEC_FOTA_MODE_ACCESS_PROCESS_PATH
	string "Accessible process path to /system/, /sst/ in FOTA mode"
	depends on SECURITY_FJSEC
	default "/system/bin/recovery"

config SECURITY_FJSEC_SDDOWNLOADER_MODE_ACCESS_PROCESS_NAME
	string "Accessible process name to /system/, /sst/ in SD Downloader mode"
	depends on SECURITY_FJSEC
	default "recovery"

config SECURITY_FJSEC_SDDOWNLOADER_MODE_ACCESS_PROCESS_PATH
	string "Accessible process path to /system/, /sst/ in SD Downloader mode"
	depends on SECURITY_FJSEC
	default "/system/bin/recovery"

config SECURITY_FJSEC_SDDOWNLOADER_MODE_ACCESS_PROCESS_MK2FS_NAME
	string "Accessible process name to /system/, /sst/ in SD Downloader mode"
	depends on SECURITY_FJSEC
	default "mke2fs"

config SECURITY_FJSEC_SDDOWNLOADER_MODE_ACCESS_PROCESS_MK2FS_PATH
	string "Accessible process path to /system/, /sst/ in SD Downloader mode"
	depends on SECURITY_FJSEC
	default "/system/bin/mke2fs"

config SECURITY_FJSEC_FSCK_PROCESS_NAME
	string "Process name of fsck"
	depends on SECURITY_FJSEC
	default "e2fsck"

config SECURITY_FJSEC_FSCK_PROCESS_PATH
	string "Process path of fsck"
	depends on SECURITY_FJSEC
	default "/system/bin/e2fsck"

config SECURITY_FJSEC_RECOVERY_MODE_ACCESS_PROCESS_NAME
	string "Accessible process name to /sst/ in recovery mode"
	depends on SECURITY_FJSEC
	default "recovery"

config SECURITY_FJSEC_RECOVERY_MODE_ACCESS_PROCESS_PATH
	string "Accessible process path to /sst/ in recovery mode"
	depends on SECURITY_FJSEC
	default "/system/bin/recovery"

config SECURITY_FJSEC_OSUPDATE_MODE_ACCESS_PROCESS_NAME
	string "Accessible process name to mmcdl device in OS update mode"
	depends on SECURITY_FJSEC
	default "recovery"

config SECURITY_FJSEC_OSUPDATE_MODE_ACCESS_PROCESS_PATH
	string "Accessible process path to mmcdl device in OS update mode"
	depends on SECURITY_FJSEC
	default "/system/bin/recovery"

config SECURITY_MMAP_DISABLE
	bool "disable fjsec_check_mapping()"
	depends on SECURITY_FJSEC


config SECURITY_FJSEC_FIRMWARE_DEV_PATH
	string "block device path for /vendor/firmware_mnt/"
	depends on SECURITY_FJSEC_AC_FIRMWARE
	default "/dev/block/mmcblk0p43"

config SECURITY_FJSEC_FIRMWARE_DIR_PATH
	string "firmware directory PATH"
	depends on SECURITY_FJSEC_AC_FIRMWARE
	default "/vendor/firmware_mnt/"

config SECURITY_FJSEC_AC_FIRMWARE
	bool "Enable access control to fiwmware_mnt directory and partition."
	depends on SECURITY_FJSEC
	default y

config SECURITY_FJSEC_DSP_DEV_PATH
	string "block device path for /vendor/dsp/"
	depends on SECURITY_FJSEC_AC_DSP
	default "/dev/block/mmcblk0p45"

config SECURITY_FJSEC_DSP_DIR_PATH
	string "dsp directory PATH"
	depends on SECURITY_FJSEC_AC_DSP
	default "/vendor/dsp/"

config SECURITY_FJSEC_AC_DSP
	bool "Enable access control to dsp directory and partition."
	depends on SECURITY_FJSEC
	default y
config SECURITY_FJSEC_FRP_DEV_PATH
	string "block device path for /frp/"
	depends on SECURITY_FJSEC
	default "/dev/block/mmcblk0p66"


choice
	prompt "Default security module"
	default DEFAULT_SECURITY_SELINUX if SECURITY_SELINUX
	default DEFAULT_SECURITY_SMACK if SECURITY_SMACK
	default DEFAULT_SECURITY_TOMOYO if SECURITY_TOMOYO
	default DEFAULT_SECURITY_APPARMOR if SECURITY_APPARMOR
	default DEFAULT_SECURITY_DAC

	help
	  Select the security module that will be used by default if the
	  kernel parameter security= is not specified.

	config DEFAULT_SECURITY_SELINUX
		bool "SELinux" if SECURITY_SELINUX=y

	config DEFAULT_SECURITY_SMACK
		bool "Simplified Mandatory Access Control" if SECURITY_SMACK=y

	config DEFAULT_SECURITY_TOMOYO
		bool "TOMOYO" if SECURITY_TOMOYO=y

	config DEFAULT_SECURITY_APPARMOR
		bool "AppArmor" if SECURITY_APPARMOR=y

	config DEFAULT_SECURITY_DAC
		bool "Unix Discretionary Access Controls"

endchoice

config DEFAULT_SECURITY
	string
	default "selinux" if DEFAULT_SECURITY_SELINUX
	default "smack" if DEFAULT_SECURITY_SMACK
	default "tomoyo" if DEFAULT_SECURITY_TOMOYO
	default "apparmor" if DEFAULT_SECURITY_APPARMOR
	default "" if DEFAULT_SECURITY_DAC

source "security/Kconfig.hardening"

endmenu

