Kconfig

  1# SPDX-License-Identifier: GPL-2.0-only
  2config SECURITY_APPARMOR
  3	bool "AppArmor support"
  4	depends on SECURITY && NET
  5	select AUDIT
  6	select SECURITY_PATH
  7	select SECURITYFS
  8	select SECURITY_NETWORK
  9	default n
 10	help
 11	  This enables the AppArmor security module.
 12	  Required userspace tools (if they are not included in your
 13	  distribution) and further information may be found at
 14	  http://apparmor.wiki.kernel.org
 15
 16	  If you are unsure how to answer this question, answer N.
 17
 18config SECURITY_APPARMOR_DEBUG
 19	bool "Build AppArmor with debug code"
 20	depends on SECURITY_APPARMOR
 21	default n
 22	help
 23	  Build apparmor with debugging logic in apparmor. Not all
 24	  debugging logic will necessarily be enabled. A submenu will
 25	  provide fine grained control of the debug options that are
 26	  available.
 27
 28config SECURITY_APPARMOR_DEBUG_ASSERTS
 29	bool "Build AppArmor with debugging asserts"
 30	depends on SECURITY_APPARMOR_DEBUG
 31	default y
 32	help
 33	  Enable code assertions made with AA_BUG. These are primarily
 34	  function entry preconditions but also exist at other key
 35	  points. If the assert is triggered it will trigger a WARN
 36	  message.
 37
 38config SECURITY_APPARMOR_DEBUG_MESSAGES
 39	bool "Debug messages enabled by default"
 40	depends on SECURITY_APPARMOR_DEBUG
 41	default n
 42	help
 43	  Set the default value of the apparmor.debug kernel parameter.
 44	  When enabled, various debug messages will be logged to
 45	  the kernel message buffer.
 46
 47config SECURITY_APPARMOR_INTROSPECT_POLICY
 48	bool "Allow loaded policy to be introspected"
 49	depends on SECURITY_APPARMOR
 50	default y
 51	help
 52	  This option selects whether introspection of loaded policy
 53	  is available to userspace via the apparmor filesystem. This
 54	  adds to kernel memory usage. It is required for introspection
 55	  of loaded policy, and check point and restore support. It
 56	  can be disabled for embedded systems where reducing memory and
 57	  cpu is paramount.
 58
 59config SECURITY_APPARMOR_HASH
 60	bool "Enable introspection of sha256 hashes for loaded profiles"
 61	depends on SECURITY_APPARMOR_INTROSPECT_POLICY
 62	select CRYPTO_LIB_SHA256
 63	default y
 64	help
 65	  This option selects whether introspection of loaded policy
 66	  hashes is available to userspace via the apparmor
 67	  filesystem. This option provides a light weight means of
 68	  checking loaded policy.  This option adds to policy load
 69	  time and can be disabled for small embedded systems.
 70
 71config SECURITY_APPARMOR_HASH_DEFAULT
 72       bool "Enable policy hash introspection by default"
 73       depends on SECURITY_APPARMOR_HASH
 74       default y
 75       help
 76	 This option selects whether sha256 hashing of loaded policy
 77	 is enabled by default. The generation of sha256 hashes for
 78	 loaded policy provide system administrators a quick way to
 79	 verify that policy in the kernel matches what is expected,
 80	 however it can slow down policy load on some devices. In
 81	 these cases policy hashing can be disabled by default and
 82	 enabled only if needed.
 83
 84config SECURITY_APPARMOR_EXPORT_BINARY
 85	bool "Allow exporting the raw binary policy"
 86	depends on SECURITY_APPARMOR_INTROSPECT_POLICY
 87	select ZSTD_COMPRESS
 88	select ZSTD_DECOMPRESS
 89	default y
 90	help
 91	  This option allows reading back binary policy as it was loaded.
 92	  It increases the amount of kernel memory needed by policy and
 93	  also increases policy load time. This option is required for
 94	  checkpoint and restore support, and debugging of loaded policy.
 95
 96config SECURITY_APPARMOR_PARANOID_LOAD
 97	bool "Perform full verification of loaded policy"
 98	depends on SECURITY_APPARMOR
 99	default y
100	help
101	  This options allows controlling whether apparmor does a full
102	  verification of loaded policy. This should not be disabled
103	  except for embedded systems where the image is read only,
104	  includes policy, and has some form of integrity check.
105	  Disabling the check will speed up policy loads.
106
107config SECURITY_APPARMOR_KUNIT_TEST
108	tristate "Build KUnit tests for policy_unpack.c" if !KUNIT_ALL_TESTS
109	depends on KUNIT && SECURITY_APPARMOR
110	default KUNIT_ALL_TESTS
111	help
112	  This builds the AppArmor KUnit tests.
113
114	  KUnit tests run during boot and output the results to the debug log
115	  in TAP format (https://testanything.org/). Only useful for kernel devs
116	  running KUnit test harness and are not for inclusion into a
117	  production build.
118
119	  For more information on KUnit and unit tests in general please refer
120	  to the KUnit documentation in Documentation/dev-tools/kunit/.
121
122	  If unsure, say N.