kernel-ark/security/integrity/Kconfig
Dmitry Kasatkin f4dc37785e integrity: define '.evm' as a builtin 'trusted' keyring
Require all keys added to the EVM keyring be signed by an
existing trusted key on the system trusted keyring.

This patch also switches IMA to use integrity_init_keyring().

Changes in v3:
* Added 'init_keyring' config based variable to skip initializing
  keyring instead of using  __integrity_init_keyring() wrapper.
* Added dependency back to CONFIG_IMA_TRUSTED_KEYRING

Changes in v2:
* Replace CONFIG_EVM_TRUSTED_KEYRING with IMA and EVM common
  CONFIG_INTEGRITY_TRUSTED_KEYRING configuration option
* Deprecate CONFIG_IMA_TRUSTED_KEYRING but keep it for config
  file compatibility. (Mimi Zohar)

Signed-off-by: Dmitry Kasatkin <dmitry.kasatkin@huawei.com>
Signed-off-by: Mimi Zohar <zohar@linux.vnet.ibm.com>
2015-11-23 14:30:02 -05:00

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#
config INTEGRITY
bool "Integrity subsystem"
depends on SECURITY
default y
help
This option enables the integrity subsystem, which is comprised
of a number of different components including the Integrity
Measurement Architecture (IMA), Extended Verification Module
(EVM), IMA-appraisal extension, digital signature verification
extension and audit measurement log support.
Each of these components can be enabled/disabled separately.
Refer to the individual components for additional details.
if INTEGRITY
config INTEGRITY_SIGNATURE
bool "Digital signature verification using multiple keyrings"
depends on KEYS
default n
select SIGNATURE
help
This option enables digital signature verification support
using multiple keyrings. It defines separate keyrings for each
of the different use cases - evm, ima, and modules.
Different keyrings improves search performance, but also allow
to "lock" certain keyring to prevent adding new keys.
This is useful for evm and module keyrings, when keys are
usually only added from initramfs.
config INTEGRITY_ASYMMETRIC_KEYS
bool "Enable asymmetric keys support"
depends on INTEGRITY_SIGNATURE
default n
select ASYMMETRIC_KEY_TYPE
select ASYMMETRIC_PUBLIC_KEY_SUBTYPE
select PUBLIC_KEY_ALGO_RSA
select X509_CERTIFICATE_PARSER
help
This option enables digital signature verification using
asymmetric keys.
config INTEGRITY_TRUSTED_KEYRING
bool "Require all keys on the integrity keyrings be signed"
depends on SYSTEM_TRUSTED_KEYRING
depends on INTEGRITY_ASYMMETRIC_KEYS
select KEYS_DEBUG_PROC_KEYS
default y
help
This option requires that all keys added to the .ima and
.evm keyrings be signed by a key on the system trusted
keyring.
config INTEGRITY_AUDIT
bool "Enables integrity auditing support "
depends on AUDIT
default y
help
In addition to enabling integrity auditing support, this
option adds a kernel parameter 'integrity_audit', which
controls the level of integrity auditing messages.
0 - basic integrity auditing messages (default)
1 - additional integrity auditing messages
Additional informational integrity auditing messages would
be enabled by specifying 'integrity_audit=1' on the kernel
command line.
source security/integrity/ima/Kconfig
source security/integrity/evm/Kconfig
endif # if INTEGRITY