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1#
2config INTEGRITY
3 bool "Integrity subsystem"
4 depends on SECURITY
5 default y
6 help
7 This option enables the integrity subsystem, which is comprised
8 of a number of different components including the Integrity
9 Measurement Architecture (IMA), Extended Verification Module
10 (EVM), IMA-appraisal extension, digital signature verification
11 extension and audit measurement log support.
12
13 Each of these components can be enabled/disabled separately.
14 Refer to the individual components for additional details.
15
16if INTEGRITY
17
18config INTEGRITY_SIGNATURE
19 bool "Digital signature verification using multiple keyrings"
20 depends on KEYS
21 default n
22 select SIGNATURE
23 help
24 This option enables digital signature verification support
25 using multiple keyrings. It defines separate keyrings for each
26 of the different use cases - evm, ima, and modules.
27 Different keyrings improves search performance, but also allow
28 to "lock" certain keyring to prevent adding new keys.
29 This is useful for evm and module keyrings, when keys are
30 usually only added from initramfs.
31
32config INTEGRITY_ASYMMETRIC_KEYS
33 bool "Enable asymmetric keys support"
34 depends on INTEGRITY_SIGNATURE
35 default n
36 select ASYMMETRIC_KEY_TYPE
37 select ASYMMETRIC_PUBLIC_KEY_SUBTYPE
38 select CRYPTO_RSA
39 select X509_CERTIFICATE_PARSER
40 help
41 This option enables digital signature verification using
42 asymmetric keys.
43
44config INTEGRITY_TRUSTED_KEYRING
45 bool "Require all keys on the integrity keyrings be signed"
46 depends on SYSTEM_TRUSTED_KEYRING
47 depends on INTEGRITY_ASYMMETRIC_KEYS
48 default y
49 help
50 This option requires that all keys added to the .ima and
51 .evm keyrings be signed by a key on the system trusted
52 keyring.
53
54config INTEGRITY_PLATFORM_KEYRING
55 bool "Provide keyring for platform/firmware trusted keys"
56 depends on INTEGRITY_ASYMMETRIC_KEYS
57 depends on SYSTEM_BLACKLIST_KEYRING
58 depends on EFI
59 help
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.
64
65config INTEGRITY_AUDIT
66 bool "Enables integrity auditing support "
67 depends on AUDIT
68 default y
69 help
70 In addition to enabling integrity auditing support, this
71 option adds a kernel parameter 'integrity_audit', which
72 controls the level of integrity auditing messages.
73 0 - basic integrity auditing messages (default)
74 1 - additional integrity auditing messages
75
76 Additional informational integrity auditing messages would
77 be enabled by specifying 'integrity_audit=1' on the kernel
78 command line.
79
80source "security/integrity/ima/Kconfig"
81source "security/integrity/evm/Kconfig"
82
83endif # if INTEGRITY