1 # SPDX-License-Identifier: GPL-2.0-only
4 bool "Integrity subsystem"
8 This option enables the integrity subsystem, which is comprised
9 of a number of different components including the Integrity
10 Measurement Architecture (IMA), Extended Verification Module
11 (EVM), IMA-appraisal extension, digital signature verification
12 extension and audit measurement log support.
14 Each of these components can be enabled/disabled separately.
15 Refer to the individual components for additional details.
19 config INTEGRITY_SIGNATURE
20 bool "Digital signature verification using multiple keyrings"
25 This option enables digital signature verification support
26 using multiple keyrings. It defines separate keyrings for each
27 of the different use cases - evm, ima, and modules.
28 Different keyrings improves search performance, but also allow
29 to "lock" certain keyring to prevent adding new keys.
30 This is useful for evm and module keyrings, when keys are
31 usually only added from initramfs.
33 config INTEGRITY_ASYMMETRIC_KEYS
34 bool "Enable asymmetric keys support"
35 depends on INTEGRITY_SIGNATURE
37 select ASYMMETRIC_KEY_TYPE
38 select ASYMMETRIC_PUBLIC_KEY_SUBTYPE
40 select X509_CERTIFICATE_PARSER
42 This option enables digital signature verification using
45 config INTEGRITY_TRUSTED_KEYRING
46 bool "Require all keys on the integrity keyrings be signed"
47 depends on SYSTEM_TRUSTED_KEYRING
48 depends on INTEGRITY_ASYMMETRIC_KEYS
51 This option requires that all keys added to the .ima and
52 .evm keyrings be signed by a key on the system trusted
55 config INTEGRITY_PLATFORM_KEYRING
56 bool "Provide keyring for platform/firmware trusted keys"
57 depends on INTEGRITY_ASYMMETRIC_KEYS
58 depends on SYSTEM_BLACKLIST_KEYRING
60 Provide a separate, distinct keyring for platform trusted keys, which
61 the kernel automatically populates during initialization from values
62 provided by the platform for verifying the kexec'ed kerned image
63 and, possibly, the initramfs signature.
66 depends on INTEGRITY_PLATFORM_KEYRING
71 depends on INTEGRITY_PLATFORM_KEYRING
76 bool "Enable loading of platform and blacklisted keys for POWER"
77 depends on INTEGRITY_PLATFORM_KEYRING
78 depends on PPC_SECURE_BOOT
81 Enable loading of keys to the .platform keyring and blacklisted
82 hashes to the .blacklist keyring for powerpc based platforms.
84 config INTEGRITY_AUDIT
85 bool "Enables integrity auditing support "
89 In addition to enabling integrity auditing support, this
90 option adds a kernel parameter 'integrity_audit', which
91 controls the level of integrity auditing messages.
92 0 - basic integrity auditing messages (default)
93 1 - additional integrity auditing messages
95 Additional informational integrity auditing messages would
96 be enabled by specifying 'integrity_audit=1' on the kernel
99 source "security/integrity/ima/Kconfig"
100 source "security/integrity/evm/Kconfig"