# NPCX DRBG driver configuration options

# Copyright (c) 2024 Nuvoton Technology Corporation.
# SPDX-License-Identifier: Apache-2.0

menuconfig ENTROPY_NPCX_DRBG
	bool "NPCX DRBG driver"
	default y
	depends on DT_HAS_NUVOTON_NPCX_DRBG_ENABLED && SOC_NPCX9MFP
	select ENTROPY_HAS_DRIVER
	help
	  This option enables the deterministic random bit generator (DRBG)
	  driver for NPCX family of processors.

if ENTROPY_NPCX_DRBG

choice
	prompt "DRBG Security Strength Selection"
	default ENTROPY_NPCX_DRBG_SECURITY_STRENGTH_128B
	help
	  The chosen security strength defines the amount of entropy bits
	  generated internally and passed to the conditioning component.

config ENTROPY_NPCX_DRBG_SECURITY_STRENGTH_112B
	bool "DRBG security strength 112 bits"

config ENTROPY_NPCX_DRBG_SECURITY_STRENGTH_128B
	bool "DRBG security strength 128 bits"

config ENTROPY_NPCX_DRBG_SECURITY_STRENGTH_192B
	bool "DRBG security strength 192 bits"

config ENTROPY_NPCX_DRBG_SECURITY_STRENGTH_256B
	bool "DRBG security strength 256 bits"

config ENTROPY_NPCX_DRBG_SECURITY_STRENGTH_128B_TEST
	bool "DRBG security strength 12b bits test"

config ENTROPY_NPCX_DRBG_SECURITY_STRENGTH_256B_TEST
	bool "DRBG security strength 256 bits test"

endchoice

config ENTROPY_NPCX_DRBG_SECURITY_STRENGTH
	int
	default 0 if ENTROPY_NPCX_DRBG_SECURITY_STRENGTH_112B
	default 1 if ENTROPY_NPCX_DRBG_SECURITY_STRENGTH_128B
	default 2 if ENTROPY_NPCX_DRBG_SECURITY_STRENGTH_192B
	default 3 if ENTROPY_NPCX_DRBG_SECURITY_STRENGTH_256B
	default 4 if ENTROPY_NPCX_DRBG_SECURITY_STRENGTH_128B_TEST
	default 5 if ENTROPY_NPCX_DRBG_SECURITY_STRENGTH_256B_TEST

config ENTROPY_NPCX_DRBG_RESEED_INTERVAL
	int "DRBG Reseed Interval"
	default 100
	help
	   Number of gererations allowed until next reseeding.

endif