tree e53511aeaad4a6151d155f02956f03c8e6b2a23d
parent 84e37d76fe316cc476630deaa1b392c0b7ab4b9f
author Dmitry Kasatkin <dmitry.kasatkin@huawei.com> 1445538392 +0300
committer Dmitry Kasatkin <dmitry.kasatkin@huawei.com> 1445886781 +0200

evm: provide a function to set EVM key from the kernel

Crypto HW kernel module can possibly initialize EVM key from the
kernel __init code to enable EVM before calling 'init' process.
This patch provide a function evm_set_key() which can be used to
set custom key directly to EVM without using KEY subsystem.

Changes in v4:
* kernel-doc style for evm_set_key

Changes in v3:
* error reporting moved to evm_set_key
* EVM_INIT_HMAC moved to evm_set_key
* added bitop to prevent key setting race

Changes in v2:
* use size_t for key size instead of signed int
* provide EVM_MAX_KEY_SIZE macro in <linux/evm.h>
* provide EVM_MIN_KEY_SIZE macro in <linux/evm.h>

Signed-off-by: Dmitry Kasatkin <dmitry.kasatkin@huawei.com>

keydoc