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# SPDX-License-Identifier: GPL-2.0-only
#
# Integrity Policy Enforcement (IPE) configuration
#
menuconfig SECURITY_IPE
bool "Integrity Policy Enforcement (IPE)"
depends on SECURITY && SECURITYFS && AUDIT && AUDITSYSCALL
select PKCS7_MESSAGE_PARSER
select SYSTEM_DATA_VERIFICATION
select IPE_PROP_DM_VERITY if DM_VERITY
select IPE_PROP_DM_VERITY_SIGNATURE if DM_VERITY && DM_VERITY_VERIFY_ROOTHASH_SIG
select IPE_PROP_FS_VERITY if FS_VERITY
select IPE_PROP_FS_VERITY_BUILTIN_SIG if FS_VERITY && FS_VERITY_BUILTIN_SIGNATURES
help
This option enables the Integrity Policy Enforcement LSM
allowing users to define a policy to enforce a trust-based access
control. A key feature of IPE is a customizable policy to allow
admins to reconfigure trust requirements on the fly.
If unsure, answer N.
if SECURITY_IPE
config IPE_BOOT_POLICY
string "Integrity policy to apply on system startup"
help
This option specifies a filepath to an IPE policy that is compiled
into the kernel. This policy will be enforced until a policy update
is deployed via the $securityfs/ipe/policies/$policy_name/active
interface.
If unsure, leave blank.
config IPE_POLICY_SIG_SECONDARY_KEYRING
bool "IPE policy update verification with secondary keyring"
default y
depends on SECONDARY_TRUSTED_KEYRING
help
Also allow the secondary trusted keyring to verify IPE policy
updates.
If unsure, answer Y.
config IPE_POLICY_SIG_PLATFORM_KEYRING
bool "IPE policy update verification with platform keyring"
default y
depends on INTEGRITY_PLATFORM_KEYRING
help
Also allow the platform keyring to verify IPE policy updates.
If unsure, answer Y.
menu "IPE Trust Providers"
config IPE_PROP_DM_VERITY
bool "Enable support for dm-verity based on root hash"
depends on DM_VERITY
help
This option enables the 'dmverity_roothash' property within IPE
policies. The property evaluates to TRUE when a file from a dm-verity
volume is evaluated, and the volume's root hash matches the value
supplied in the policy.
config IPE_PROP_DM_VERITY_SIGNATURE
bool "Enable support for dm-verity based on root hash signature"
depends on DM_VERITY && DM_VERITY_VERIFY_ROOTHASH_SIG
help
This option enables the 'dmverity_signature' property within IPE
policies. The property evaluates to TRUE when a file from a dm-verity
volume, which has been mounted with a valid signed root hash,
is evaluated.
If unsure, answer Y.
config IPE_PROP_FS_VERITY
bool "Enable support for fs-verity based on file digest"
depends on FS_VERITY
help
This option enables the 'fsverity_digest' property within IPE
policies. The property evaluates to TRUE when a file is fsverity
enabled and its digest matches the supplied digest value in the
policy.
if unsure, answer Y.
config IPE_PROP_FS_VERITY_BUILTIN_SIG
bool "Enable support for fs-verity based on builtin signature"
depends on FS_VERITY && FS_VERITY_BUILTIN_SIGNATURES
help
This option enables the 'fsverity_signature' property within IPE
policies. The property evaluates to TRUE when a file is fsverity
enabled and it has a valid builtin signature whose signing cert
is in the .fs-verity keyring.
if unsure, answer Y.
endmenu
config SECURITY_IPE_KUNIT_TEST
bool "Build KUnit tests for IPE" if !KUNIT_ALL_TESTS
depends on KUNIT=y
default KUNIT_ALL_TESTS
help
This builds the IPE KUnit tests.
KUnit tests run during boot and output the results to the debug log
in TAP format (https://testanything.org/). Only useful for kernel devs
running KUnit test harness and are not for inclusion into a
production build.
For more information on KUnit and unit tests in general please refer
to the KUnit documentation in Documentation/dev-tools/kunit/.
If unsure, say N.
endif
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