ima: add support for measuring and appraising firmware
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>
diff --git a/security/integrity/ima/ima_appraise.c b/security/integrity/ima/ima_appraise.c
index 59ac902..86bfd5c 100644
--- a/security/integrity/ima/ima_appraise.c
+++ b/security/integrity/ima/ima_appraise.c
@@ -75,6 +75,8 @@
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 @@
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 @@
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);