xref: /openbmc/linux/security/integrity/Kconfig (revision ba61bb17)
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_AUDIT
55	bool "Enables integrity auditing support "
56	depends on AUDIT
57	default y
58	help
59	  In addition to enabling integrity auditing support, this
60	  option adds a kernel parameter 'integrity_audit', which
61	  controls the level of integrity auditing messages.
62	  0 - basic integrity auditing messages (default)
63	  1 - additional integrity auditing messages
64
65	  Additional informational integrity auditing messages would
66	  be enabled by specifying 'integrity_audit=1' on the kernel
67	  command line.
68
69source security/integrity/ima/Kconfig
70source security/integrity/evm/Kconfig
71
72endif   # if INTEGRITY
73