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# IBM Integrity Measurement Architecture
#
config IMA
bool "Integrity Measurement Architecture(IMA)"
depends on SECURITY
select SECURITYFS
select CRYPTO
select CRYPTO_HMAC
select CRYPTO_MD5
select CRYPTO_SHA1
select TCG_TPM if !S390
select TCG_TIS if TCG_TPM
help
The Trusted Computing Group(TCG) runtime Integrity
Measurement Architecture(IMA) maintains a list of hash
values of executables and other sensitive system files,
as they are read or executed. If an attacker manages
to change the contents of an important system file
being measured, we can tell.
If your system has a TPM chip, then IMA also maintains
an aggregate integrity value over this list inside the
TPM hardware, so that the TPM can prove to a third party
whether or not critical system files have been modified.
Read <http://www.usenix.org/events/sec04/tech/sailer.html>
to learn more about IMA.
If unsure, say N.
config IMA_MEASURE_PCR_IDX
int
depends on IMA
range 8 14
default 10
help
IMA_MEASURE_PCR_IDX determines the TPM PCR register index
that IMA uses to maintain the integrity aggregate of the
measurement list. If unsure, use the default 10.
config IMA_AUDIT
bool
depends on IMA
default y
help
This option adds a kernel parameter 'ima_audit', which
allows informational auditing messages to be enabled
at boot. If this option is selected, informational integrity
auditing messages can be enabled with 'ima_audit=1' on
the kernel command line.
config IMA_LSM_RULES
bool
depends on IMA && AUDIT && (SECURITY_SELINUX || SECURITY_SMACK)
default y
help
Disabling this option will disregard LSM based policy rules.
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