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

[Nayna Jain]

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[] = {
>> +    "appraise func=KEXEC_KERNEL_CHECK appraise_type=imasig|modsig",
>> +#ifndef CONFIG_MODULE_SIG_FORCE
>> +    "appraise func=MODULE_CHECK appraise_type=imasig|modsig",
>> +#endif
>> +    NULL
>> +};
>
> 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,

     - Nayna