linux-kernel - [RFC PATCH 4/4] usb: core: Add Kconfig option to compile usb authorization

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Message-Id: <20250620-usb_authentication-v1-4-0d92261a5779@ssi.gouv.fr>
Date: Fri, 20 Jun 2025 16:27:19 +0200
From: nicolas.bouchinet@....cyber.gouv.fr
To: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: Alan Stern <stern@...land.harvard.edu>, 
 Kannappan R <r.kannappan@...el.com>, 
 Sabyrzhan Tasbolatov <snovitoll@...il.com>, 
 Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>, 
 Stefan Eichenberger <stefan.eichenberger@...adex.com>, 
 Thomas Gleixner <tglx@...utronix.de>, Pawel Laszczak <pawell@...ence.com>, 
 Ma Ke <make_ruc2021@....com>, Jeff Johnson <jeff.johnson@....qualcomm.com>, 
 Luc Bonnafoux <luc.bonnafoux@....gouv.fr>, 
 Luc Bonnafoux <luc.bonnafoux@....cyber.gouv.fr>, 
 Nicolas Bouchinet <nicolas.bouchinet@....gouv.fr>, 
 linux-kernel@...r.kernel.org, linux-usb@...r.kernel.org
Subject: [RFC PATCH 4/4] usb: core: Add Kconfig option to compile usb
 authorization

From: Nicolas Bouchinet <nicolas.bouchinet@....gouv.fr>

This enables the usb authentication protocol implementation.

Co-developed-by: Luc Bonnafoux <luc.bonnafoux@....gouv.fr>
Signed-off-by: Luc Bonnafoux <luc.bonnafoux@....gouv.fr>
Signed-off-by: Nicolas Bouchinet <nicolas.bouchinet@....gouv.fr>
---
 drivers/usb/core/Kconfig  | 8 ++++++++
 drivers/usb/core/Makefile | 4 ++++
 2 files changed, 12 insertions(+)

diff --git a/drivers/usb/core/Kconfig b/drivers/usb/core/Kconfig
index 58e3ca7e479392112f656384c664efc36bb1151a..07ba67137b7fe16ecb1e993a51dbbfd4dd3ada88 100644
--- a/drivers/usb/core/Kconfig
+++ b/drivers/usb/core/Kconfig
@@ -143,3 +143,11 @@ config USB_DEFAULT_AUTHORIZATION_MODE
 	  ACPI selecting value 2 is analogous to selecting value 0.
 
 	  If unsure, keep the default value.
+
+config USB_AUTHENTICATION
+	bool "Enable USB authentication function"
+	default n
+	depends on USB
+	help
+		Enables the USB Authentication function. This activates the
+		hook points in the USB stack.
diff --git a/drivers/usb/core/Makefile b/drivers/usb/core/Makefile
index ac006abd13b3ad8362dc7baa115124c11eaafc84..7ba1a89cf3de7a398889eee1820f2bfbbc4280f5 100644
--- a/drivers/usb/core/Makefile
+++ b/drivers/usb/core/Makefile
@@ -8,6 +8,10 @@ usbcore-y += config.o file.o buffer.o sysfs.o endpoint.o
 usbcore-y += devio.o notify.o generic.o quirks.o devices.o
 usbcore-y += phy.o port.o
 
+ifdef CONFIG_USB_AUTHENTICATION
+usbcore-y += authent.o authent_netlink.o
+endif
+
 usbcore-$(CONFIG_OF)		+= of.o
 usbcore-$(CONFIG_USB_PCI)		+= hcd-pci.o
 usbcore-$(CONFIG_ACPI)		+= usb-acpi.o

-- 
2.50.0