Re: [PATCH v9 2/8] powerpc/ima: add support to initialize ima policy rules

From: Nayna Jain
Date: Fri Oct 25 2019 - 13:02:36 EST

On 10/24/19 12:35 PM, Lakshmi Ramasubramanian wrote:
On 10/23/2019 8:47 PM, Nayna Jain wrote:

+ * The "secure_rules" are enabled only on "secureboot" enabled systems.
+ * These rules verify the file signatures against known good values.
+ * The "appraise_type=imasig|modsig" option allows the known good signature
+ * to be stored as an xattr or as an appended signature.
+ *
+ * To avoid duplicate signature verification as much as possible, the IMA
+ * policy rule for module appraisal is added only if CONFIG_MODULE_SIG_FORCE
+ * is not enabled.
+ */
+static const char *const secure_rules[] = {
+ÂÂÂ "appraise func=KEXEC_KERNEL_CHECK appraise_type=imasig|modsig",
+ÂÂÂ "appraise func=MODULE_CHECK appraise_type=imasig|modsig",

Is there any way to not use conditional compilation in the above array definition? Maybe define different functions to get "secure_rules" for when CONFIG_MODULE_SIG_FORCE is defined and when it is not defined.

How will you decide which function to be called ?

Thanks & Regards,

ÂÂÂ - Nayna