1# SPDX-License-Identifier: GPL-2.0-only
2#
3config INTEGRITY
4	bool "Integrity subsystem"
5	depends on SECURITY
6	default y
7	help
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.
13
14	  Each of these components can be enabled/disabled separately.
15	  Refer to the individual components for additional details.
16
17if INTEGRITY
18
19config INTEGRITY_SIGNATURE
20	bool "Digital signature verification using multiple keyrings"
21	default n
22	select KEYS
23	select SIGNATURE
24	help
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.
32
33config INTEGRITY_ASYMMETRIC_KEYS
34	bool "Enable asymmetric keys support"
35	depends on INTEGRITY_SIGNATURE
36	default n
37        select ASYMMETRIC_KEY_TYPE
38        select ASYMMETRIC_PUBLIC_KEY_SUBTYPE
39        select CRYPTO_RSA
40        select X509_CERTIFICATE_PARSER
41	help
42	  This option enables digital signature verification using
43	  asymmetric keys.
44
45config 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
49	default y
50	help
51	   This option requires that all keys added to the .ima and
52	   .evm keyrings be signed by a key on the system trusted
53	   keyring.
54
55config INTEGRITY_PLATFORM_KEYRING
56        bool "Provide keyring for platform/firmware trusted keys"
57        depends on INTEGRITY_ASYMMETRIC_KEYS
58        depends on SYSTEM_BLACKLIST_KEYRING
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_MACHINE_KEYRING
66	bool "Provide a keyring to which Machine Owner Keys may be added"
67	depends on SECONDARY_TRUSTED_KEYRING
68	depends on INTEGRITY_ASYMMETRIC_KEYS
69	depends on SYSTEM_BLACKLIST_KEYRING
70	depends on LOAD_UEFI_KEYS
71	depends on !IMA_KEYRINGS_PERMIT_SIGNED_BY_BUILTIN_OR_SECONDARY
72	help
73	 If set, provide a keyring to which Machine Owner Keys (MOK) may
74	 be added. This keyring shall contain just MOK keys.  Unlike keys
75	 in the platform keyring, keys contained in the .machine keyring will
76	 be trusted within the kernel.
77
78config LOAD_UEFI_KEYS
79       depends on INTEGRITY_PLATFORM_KEYRING
80       depends on EFI
81       def_bool y
82
83config LOAD_IPL_KEYS
84       depends on INTEGRITY_PLATFORM_KEYRING
85       depends on S390
86       def_bool y
87
88config LOAD_PPC_KEYS
89	bool "Enable loading of platform and blacklisted keys for POWER"
90	depends on INTEGRITY_PLATFORM_KEYRING
91	depends on PPC_SECURE_BOOT
92	default y
93	help
94	  Enable loading of keys to the .platform keyring and blacklisted
95	  hashes to the .blacklist keyring for powerpc based platforms.
96
97config INTEGRITY_AUDIT
98	bool "Enables integrity auditing support "
99	depends on AUDIT
100	default y
101	help
102	  In addition to enabling integrity auditing support, this
103	  option adds a kernel parameter 'integrity_audit', which
104	  controls the level of integrity auditing messages.
105	  0 - basic integrity auditing messages (default)
106	  1 - additional integrity auditing messages
107
108	  Additional informational integrity auditing messages would
109	  be enabled by specifying 'integrity_audit=1' on the kernel
110	  command line.
111
112source "security/integrity/ima/Kconfig"
113source "security/integrity/evm/Kconfig"
114
115endif   # if INTEGRITY
116