2023-05-19 20:27:13

by Jorge Lopez

[permalink] [raw]
Subject: [PATCH v15 00/13] hp-bioscfg driver

HP BIOS Configuration driver purpose is to provide a driver supporting
the latest sysfs class firmware attributes framework allowing the user
to change BIOS settings and security solutions on HP Inc.’s commercial
notebooks.

Many features of HP Commercial notebooks can be managed using Windows
Management Instrumentation (WMI). WMI is an implementation of Web-Based
Enterprise Management (WBEM) that provides a standards-based interface
for changing and monitoring system settings. HP BIOSCFG driver provides
a native Linux solution and the exposed features facilitates the
migration to Linux environments.

The Linux security features to be provided in hp-bioscfg driver enables
managing the BIOS settings and security solutions via sysfs, a virtual
filesystem that can be used by user-mode applications. The new
documentation cover HP-specific firmware sysfs attributes such Secure
Platform Management and Sure Start. Each section provides security
feature description and identifies sysfs directories and files exposed
by the driver.

Many HP Commercial notebooks include a feature called Secure Platform
Management (SPM), which replaces older password-based BIOS settings
management with public key cryptography. PC secure product management
begins when a target system is provisioned with cryptographic keys
that are used to ensure the integrity of communications between system
management utilities and the BIOS.

HP Commercial notebooks have several BIOS settings that control its
behaviour and capabilities, many of which are related to security.
To prevent unauthorized changes to these settings, the system can
be configured to use a cryptographic signature-based authorization
string that the BIOS will use to verify authorization to modify the
setting.

Linux Security components are under development and not published yet.
The only linux component is the driver (hp bioscfg) at this time.
Other published security components are under Windows.

Signed-off-by: Jorge Lopez <[email protected]>

---
Based on the latest platform-drivers-x86.git/for-next

History

Version 15
Only patches marked [update] changed between version 15 and 14

Patches
Documentation [update]
biosattr-interface
bioscfg
bioscfg-h
enum-attributes
int-attributes
order-list-attributes
passwdattr-interface
spmobj-attributes [update]
string-attributes
surestart-attributes
Makefile ../hp/Makefile ../hp/Kconfig
MAINTAINERS

Version 14
Only patches marked [update] changed between version 14 and 13
Sorted commit patches alphabetically
Rename ordered-attributes to order-list-attributes

Patches
Documentation
biosattr-interface [update]
bioscfg
bioscfg-h
enum-attributes [update]
int-attributes
order-list-attributes
passwdattr-interface
spmobj-attributes
string-attributes
surestart-attributes
Makefile ../hp/Makefile ../hp/Kconfig
MAINTAINERS


Version 13
Only patches marked [update] changed between version 12 and 13
Sorted commit patches alphabetically
Rename ordered-attributes to order-list-attributes

Patches
Documentation [update]
biosattr-interface [update]
bioscfg [update]
bioscfg-h [update]
enum-attributes [update]
int-attributes [update]
order-list-attributes [update]
passwdattr-interface [update]
spmobj-attributes [update]
string-attributes [update]
surestart-attributes [update]
Makefile ../hp/Makefile ../hp/Kconfig
MAINTAINERS

Version 12
Only patches marked [update] changed between version 11 and 12

Patches
Documentation [update]
biosattr-interface [update]
bioscfg [update]
int-attributes [update]
ordered-attributes [update]
passwdobj-attributes [deleted]
string-attributes [update]
bioscfg-h [update]
enum-attributes [update]
passwdattr-interface [update]
spmobj-attributes [update]
surestart-attributes [update]
Makefile ../hp/Makefile ../hp/Kconfig [update]
MAINTAINERS


Version 11
Only patches marked [update] changed between version 10 and 11

Patches
Documentation
biosattr-interface [update]
bioscfg
int-attributes
ordered-attributes
passwdobj-attributes [update]
string-attributes
bioscfg-h
enum-attributes
passwdattr-interface
spmobj-attributes [update]
surestart-attributes [update]
Makefile ../hp/Makefile ../hp/Kconfig
MAINTAINERS

Version 10
Break down changes to single files per patch
Removed SPM/statusbin support
Patches
Documentation
biosattr-interface
bioscfg
int-attributes
ordered-attributes
passwdobj-attributes
string-attributes
bioscfg-h
enum-attributes
passwdattr-interface
spmobj-attributes
surestart-attributes
Makefile ../hp/Makefile ../hp/Kconfig
MAINTAINERS

Version 9
Includes only sysfs-class-firmware-attributes documentation

Version 8
Includes only sysfs-class-firmware-attributes documentation

Version 7
Includes only sysfs-class-firmware-attributes documentation



Jorge Lopez (13):
hp-bioscfg: Documentation
hp-bioscfg: bioscfg-h
hp-bioscfg: bioscfg
hp-bioscfg: biosattr-interface
hp-bioscfg: enum-attributes
hp-bioscfg: int-attributes
hp-bioscfg: order-list-attributes
hp-bioscfg: passwdobj-attributes
hp-bioscfg: spmobj-attributes
hp-bioscfg: string-attributes
hp-bioscfg: surestart-attributes
hp-bioscfg: Makefile
hp-bioscfg: MAINTAINERS

.../testing/sysfs-class-firmware-attributes | 101 +-
MAINTAINERS | 6 +
drivers/platform/x86/hp/Kconfig | 16 +
drivers/platform/x86/hp/Makefile | 1 +
drivers/platform/x86/hp/hp-bioscfg/Makefile | 11 +
.../x86/hp/hp-bioscfg/biosattr-interface.c | 318 ++++++
drivers/platform/x86/hp/hp-bioscfg/bioscfg.c | 988 ++++++++++++++++++
drivers/platform/x86/hp/hp-bioscfg/bioscfg.h | 486 +++++++++
.../x86/hp/hp-bioscfg/enum-attributes.c | 465 +++++++++
.../x86/hp/hp-bioscfg/int-attributes.c | 440 ++++++++
.../x86/hp/hp-bioscfg/order-list-attributes.c | 454 ++++++++
.../x86/hp/hp-bioscfg/passwdobj-attributes.c | 540 ++++++++++
.../x86/hp/hp-bioscfg/spmobj-attributes.c | 386 +++++++
.../x86/hp/hp-bioscfg/string-attributes.c | 404 +++++++
.../x86/hp/hp-bioscfg/surestart-attributes.c | 132 +++
15 files changed, 4746 insertions(+), 2 deletions(-)
create mode 100644 drivers/platform/x86/hp/hp-bioscfg/Makefile
create mode 100644 drivers/platform/x86/hp/hp-bioscfg/biosattr-interface.c
create mode 100644 drivers/platform/x86/hp/hp-bioscfg/bioscfg.c
create mode 100644 drivers/platform/x86/hp/hp-bioscfg/bioscfg.h
create mode 100644 drivers/platform/x86/hp/hp-bioscfg/enum-attributes.c
create mode 100644 drivers/platform/x86/hp/hp-bioscfg/int-attributes.c
create mode 100644 drivers/platform/x86/hp/hp-bioscfg/order-list-attributes.c
create mode 100644 drivers/platform/x86/hp/hp-bioscfg/passwdobj-attributes.c
create mode 100644 drivers/platform/x86/hp/hp-bioscfg/spmobj-attributes.c
create mode 100644 drivers/platform/x86/hp/hp-bioscfg/string-attributes.c
create mode 100644 drivers/platform/x86/hp/hp-bioscfg/surestart-attributes.c

--
2.34.1



2023-05-19 20:28:15

by Jorge Lopez

[permalink] [raw]
Subject: [PATCH v15 12/13] hp-bioscfg: Makefile

HP BIOS Configuration driver purpose is to provide a driver supporting
the latest sysfs class firmware attributes framework allowing the user
to change BIOS settings and security solutions on HP Inc.’s commercial
notebooks.

Many features of HP Commercial notebooks can be managed using Windows
Management Instrumentation (WMI). WMI is an implementation of Web-Based
Enterprise Management (WBEM) that provides a standards-based interface
for changing and monitoring system settings. HP BIOSCFG driver provides
a native Linux solution and the exposed features facilitates the
migration to Linux environments.

The Linux security features to be provided in hp-bioscfg driver enables
managing the BIOS settings and security solutions via sysfs, a virtual
filesystem that can be used by user-mode applications. The new
documentation cover HP-specific firmware sysfs attributes such Secure
Platform Management and Sure Start. Each section provides security
feature description and identifies sysfs directories and files exposed
by the driver.

Many HP Commercial notebooks include a feature called Secure Platform
Management (SPM), which replaces older password-based BIOS settings
management with public key cryptography. PC secure product management
begins when a target system is provisioned with cryptographic keys
that are used to ensure the integrity of communications between system
management utilities and the BIOS.

HP Commercial notebooks have several BIOS settings that control its
behaviour and capabilities, many of which are related to security.
To prevent unauthorized changes to these settings, the system can
be configured to use a cryptographic signature-based authorization
string that the BIOS will use to verify authorization to modify the
setting.

Linux Security components are under development and not published yet.
The only linux component is the driver (hp bioscfg) at this time.
Other published security components are under Windows.

Signed-off-by: Jorge Lopez <[email protected]>

---
Based on the latest platform-drivers-x86.git/for-next
---
drivers/platform/x86/hp/Kconfig | 16 ++++++++++++++++
drivers/platform/x86/hp/Makefile | 1 +
drivers/platform/x86/hp/hp-bioscfg/Makefile | 11 +++++++++++
3 files changed, 28 insertions(+)
create mode 100644 drivers/platform/x86/hp/hp-bioscfg/Makefile

diff --git a/drivers/platform/x86/hp/Kconfig b/drivers/platform/x86/hp/Kconfig
index ae165955311c..7fef4f12e498 100644
--- a/drivers/platform/x86/hp/Kconfig
+++ b/drivers/platform/x86/hp/Kconfig
@@ -60,4 +60,20 @@ config TC1100_WMI
This is a driver for the WMI extensions (wireless and bluetooth power
control) of the HP Compaq TC1100 tablet.

+config HP_BIOSCFG
+ tristate "HP BIOS Configuration Driver"
+ default m
+ depends on ACPI_WMI
+ select NLS
+ select FW_ATTR_CLASS
+ help
+ This driver enables administrators to securely manage BIOS settings
+ using digital certificates and public-key cryptography that eliminate
+ the need for passwords for both remote and local management. It supports
+ changing BIOS settings on many HP machines from 2018 and newer without
+ the use of any additional software.
+
+ To compile this driver as a module, choose M here: the module will
+ be called hp-bioscfg.
+
endif # X86_PLATFORM_DRIVERS_HP
diff --git a/drivers/platform/x86/hp/Makefile b/drivers/platform/x86/hp/Makefile
index db1eed4cd7c7..e4f908a61acf 100644
--- a/drivers/platform/x86/hp/Makefile
+++ b/drivers/platform/x86/hp/Makefile
@@ -8,3 +8,4 @@
obj-$(CONFIG_HP_ACCEL) += hp_accel.o
obj-$(CONFIG_HP_WMI) += hp-wmi.o
obj-$(CONFIG_TC1100_WMI) += tc1100-wmi.o
+obj-$(CONFIG_HP_BIOSCFG) += hp-bioscfg/
diff --git a/drivers/platform/x86/hp/hp-bioscfg/Makefile b/drivers/platform/x86/hp/hp-bioscfg/Makefile
new file mode 100644
index 000000000000..67be0d917753
--- /dev/null
+++ b/drivers/platform/x86/hp/hp-bioscfg/Makefile
@@ -0,0 +1,11 @@
+obj-$(CONFIG_HP_BIOSCFG) := hp-bioscfg.o
+
+hp-bioscfg-objs := bioscfg.o \
+ biosattr-interface.o \
+ enum-attributes.o \
+ int-attributes.o \
+ order-list-attributes.o \
+ passwdobj-attributes.o \
+ spmobj-attributes.o \
+ string-attributes.o \
+ surestart-attributes.o
--
2.34.1