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linux-headers-6.8.0-88-generic
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integrity
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Kconfig
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# SPDX-License-Identifier: GPL-2.0-only # config INTEGRITY bool "Integrity subsystem" depends on SECURITY default y help This option enables the integrity subsystem, which is comprised of a number of different components including the Integrity Measurement Architecture (IMA), Extended Verification Module (EVM), IMA-appraisal extension, digital signature verification extension and audit measurement log support. Each of these components can be enabled/disabled separately. Refer to the individual components for additional details. if INTEGRITY config INTEGRITY_SIGNATURE bool "Digital signature verification using multiple keyrings" default n select KEYS select SIGNATURE help This option enables digital signature verification support using multiple keyrings. It defines separate keyrings for each of the different use cases - evm, ima, and modules. Different keyrings improves search performance, but also allow to "lock" certain keyring to prevent adding new keys. This is useful for evm and module keyrings, when keys are usually only added from initramfs. config INTEGRITY_ASYMMETRIC_KEYS bool "Enable asymmetric keys support" depends on INTEGRITY_SIGNATURE default n select ASYMMETRIC_KEY_TYPE select ASYMMETRIC_PUBLIC_KEY_SUBTYPE select CRYPTO_RSA select X509_CERTIFICATE_PARSER help This option enables digital signature verification using asymmetric keys. config INTEGRITY_TRUSTED_KEYRING bool "Require all keys on the integrity keyrings be signed" depends on SYSTEM_TRUSTED_KEYRING depends on INTEGRITY_ASYMMETRIC_KEYS default y help This option requires that all keys added to the .ima and .evm keyrings be signed by a key on the system trusted keyring. config INTEGRITY_PLATFORM_KEYRING bool "Provide keyring for platform/firmware trusted keys" depends on INTEGRITY_ASYMMETRIC_KEYS depends on SYSTEM_BLACKLIST_KEYRING help Provide a separate, distinct keyring for platform trusted keys, which the kernel automatically populates during initialization from values provided by the platform for verifying the kexec'ed kerned image and, possibly, the initramfs signature. config INTEGRITY_MACHINE_KEYRING bool "Provide a keyring to which Machine Owner Keys may be added" depends on SECONDARY_TRUSTED_KEYRING depends on INTEGRITY_ASYMMETRIC_KEYS depends on SYSTEM_BLACKLIST_KEYRING depends on LOAD_UEFI_KEYS || LOAD_PPC_KEYS help If set, provide a keyring to which Machine Owner Keys (MOK) may be added. This keyring shall contain just MOK keys. Unlike keys in the platform keyring, keys contained in the .machine keyring will be trusted within the kernel. config INTEGRITY_CA_MACHINE_KEYRING bool "Enforce Machine Keyring CA Restrictions" depends on INTEGRITY_MACHINE_KEYRING default n help The .machine keyring can be configured to enforce CA restriction on any key added to it. By default no restrictions are in place and all Machine Owner Keys (MOK) are added to the machine keyring. If enabled only CA keys are added to the machine keyring, all other MOK keys load into the platform keyring. config INTEGRITY_CA_MACHINE_KEYRING_MAX bool "Only CA keys without DigitialSignature usage set" depends on INTEGRITY_CA_MACHINE_KEYRING default n help When selected, only load CA keys are loaded into the machine keyring that contain the CA bit set along with the keyCertSign Usage field. Keys containing the digitialSignature Usage field will not be loaded. The remaining MOK keys are loaded into the .platform keyring. config LOAD_UEFI_KEYS depends on INTEGRITY_PLATFORM_KEYRING depends on EFI def_bool y config LOAD_IPL_KEYS depends on INTEGRITY_PLATFORM_KEYRING depends on S390 def_bool y config LOAD_PPC_KEYS bool "Enable loading of platform and blacklisted keys for POWER" depends on INTEGRITY_PLATFORM_KEYRING depends on PPC_SECURE_BOOT default y help Enable loading of keys to the .platform keyring and blacklisted hashes to the .blacklist keyring for powerpc based platforms. config INTEGRITY_AUDIT bool "Enables integrity auditing support " depends on AUDIT default y help In addition to enabling integrity auditing support, this option adds a kernel parameter 'integrity_audit', which controls the level of integrity auditing messages. 0 - basic integrity auditing messages (default) 1 - additional integrity auditing messages Additional informational integrity auditing messages would be enabled by specifying 'integrity_audit=1' on the kernel command line. source "security/integrity/ima/Kconfig" source "security/integrity/evm/Kconfig" endif # if INTEGRITY