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evm: load an x509 certificate from the kernel

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This patch defines a configuration option and the evm_load_x509() hook
to load an X509 certificate onto the EVM trusted kernel keyring.

Changes in v4:
* Patch description updated

Changes in v3:
* Removed EVM_X509_PATH definition. CONFIG_EVM_X509_PATH is used
  directly.

Changes in v2:
* default key patch changed to /etc/keys

Signed-off-by: Dmitry Kasatkin <dmitry.kasatkin@huawei.com>
Signed-off-by: Mimi Zohar <zohar@linux.vnet.ibm.com>
This commit is contained in:
Dmitry Kasatkin
2015-10-22 21:26:21 +03:00
committed by Mimi Zohar
parent f4dc37785e
commit 2ce523eb89
4 changed files with 33 additions and 0 deletions
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17
security/integrity/evm/Kconfig
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@@ -42,3 +42,20 @@ config EVM_EXTRA_SMACK_XATTRS
additional info to the calculation, requires existing EVM
labeled file systems to be relabeled.
config EVM_LOAD_X509
bool "Load an X509 certificate onto the '.evm' trusted keyring"
depends on INTEGRITY_TRUSTED_KEYRING
default n
help
Load an X509 certificate onto the '.evm' trusted keyring.
This option enables X509 certificate loading from the kernel
onto the '.evm' trusted keyring. A public key can be used to
verify EVM integrity starting from the 'init' process.
config EVM_X509_PATH
string "EVM X509 certificate path"
depends on EVM_LOAD_X509
default "/etc/keys/x509_evm.der"
help
This option defines X509 certificate path.