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ima: add support for measuring and appraising firmware

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The "security: introduce kernel_fw_from_file hook" patch defined a
new security hook to evaluate any loaded firmware that wasn't built
into the kernel.

This patch defines ima_fw_from_file(), which is called from the new
security hook, to measure and/or appraise the loaded firmware's
integrity.

Signed-off-by: Mimi Zohar <zohar@linux.vnet.ibm.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
This commit is contained in:
Mimi Zohar
2014-07-22 10:39:48 -04:00
committed by Kees Cook
parent 6593d9245b
commit 5a9196d715
8 changed files with 50 additions and 5 deletions
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8
security/integrity/ima/ima_appraise.c
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@@ -75,6 +75,8 @@ enum integrity_status ima_get_cache_status(struct integrity_iint_cache *iint,
return iint->ima_bprm_status;
case MODULE_CHECK:
return iint->ima_module_status;
case FIRMWARE_CHECK:
return iint->ima_firmware_status;
case FILE_CHECK:
default:
return iint->ima_file_status;
@@ -94,6 +96,9 @@ static void ima_set_cache_status(struct integrity_iint_cache *iint,
case MODULE_CHECK:
iint->ima_module_status = status;
break;
case FIRMWARE_CHECK:
iint->ima_firmware_status = status;
break;
case FILE_CHECK:
default:
iint->ima_file_status = status;
@@ -113,6 +118,9 @@ static void ima_cache_flags(struct integrity_iint_cache *iint, int func)
case MODULE_CHECK:
iint->flags |= (IMA_MODULE_APPRAISED | IMA_APPRAISED);
break;
case FIRMWARE_CHECK:
iint->flags |= (IMA_FIRMWARE_APPRAISED | IMA_APPRAISED);
break;
case FILE_CHECK:
default:
iint->flags |= (IMA_FILE_APPRAISED | IMA_APPRAISED);