Messages in this thread | | | From | Mimi Zohar <> | Subject | [PATCH 0/4] ima: builtin policy requiring file signatures | Date | Tue, 2 May 2017 14:47:08 -0400 |
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The builtin "ima_appraise_tcb" policy should require file signatures for at least a few of the hooks (eg. kernel modules, firmware, kexec kernel image, and the IMA policy), but changing it would break the existing userspace/kernel ABI.
This patch set extends the "ima_policy=" boot command line option to support specifying multiple builtin policies, introduces a new builtin policy named "secure_boot" to require file signatures, defines a new Kconfig option to permit specifying "log" and "fix" modes as options on the "ima_appraise=" boot command line, and defines is_ima_appraise_enabled().
These changes provide some of the missing functionality needed for the "locked-down" patch set to detect whether file signatures are being validated.
Mimi
Mimi Zohar (4): ima: extend the "ima_policy" boot command line to support multiple policies ima: define a set of appraisal rules requiring file signatures ima: define Kconfig IMA_APPRAISE_BOOTPARAM option ima: define is_ima_appraise_enabled()
Documentation/admin-guide/kernel-parameters.txt | 21 +++++++++---- include/linux/ima.h | 6 ++++ security/integrity/ima/Kconfig | 8 +++++ security/integrity/ima/ima_appraise.c | 12 ++++++++ security/integrity/ima/ima_policy.c | 41 +++++++++++++++++++++---- 5 files changed, 76 insertions(+), 12 deletions(-)
-- 2.7.4
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