On Wed, Sep 12, 2018 at 09:57:20AM -0400, Stephen Smalley wrote: > On 09/12/2018 09:26 AM, Ted Toth wrote: > > > > > > On Wed, Sep 12, 2018 at 8:04 AM Stephen Smalley <s...@tycho.nsa.gov > > <mailto:s...@tycho.nsa.gov>> wrote: > > > > On 09/11/2018 04:59 PM, Ted Toth wrote: > > > That's awesome and now it's got me thinking about other > > > classes/permissions that we could implement. Can cil macros can be > > > referenced in .te/.if files? > > > > Not sure I understand your question. You can't directly embed cil > > statements in .te/.if files. However, if you define a class/permission > > in a .cil module, you can certainly specify a require on it and use it > > from a conventional .te/.if module, ala: > > $ cat > usemcstrans.te <<EOF > > policy_module(usemcstrans, 1.0) > > > > require { > > class mcstrans { color_use }; > > attribute domain; > > } > > > > allow domain self:mcstrans color_use; > > EOF > > > > $ make -f /usr/share/selinux/devel/Makefile usemcstrans.pp > > $ sudo semodule -i usemcstrans.pp > > > > > > If the cil contained: > > > > (macro use_color (type caller) (allow caller self mcstrans (color_use))) > > > > then in x.te can I use the macro: > > > > type x_t; > > use_color(x_t) > > Sorry, no. The macros used in .te/.if files are just m4 definitions handled > at the preprocessing stage, not a feature of the module language. The CIL > macros are directly supported by the CIL compiler, but they won't be visible > to the module compiler. Also, you are missing several parentheses above > (I'm not fond of the lisp-like syntax myself). In a CIL module, I think the > correct syntax would be: > > (macro use_color ((type caller)) (allow caller self (mcstrans (color_use)))) > > (call use_color(x_t)) > > Or you could define a m4 macro in an .if file and use that in a .te file. > Or both. >
Ideally you would have all of your policy written in CIL or in a high-level language that was designed to leverage CIL. My DSSP2 policy is a CIL-only policy. In there I also leverage unordered classes, Meaning that for example if you remove or disable the mcstrans module then you automatically also remove or disable the access vectors that mcstrans manages. minimal: https://github.com/DefenSec/dssp2-minimal standard (my personal policy based on top of minimal): https://github.com/DefenSec/dssp2-standard/commits/master DSSP2 does not support enforcement of confidentiality though > _______________________________________________ > Selinux mailing list > Selinux@tycho.nsa.gov > To unsubscribe, send email to selinux-le...@tycho.nsa.gov. > To get help, send an email containing "help" to selinux-requ...@tycho.nsa.gov. -- Key fingerprint = 5F4D 3CDB D3F8 3652 FBD8 02D5 3B6C 5F1D 2C7B 6B02 https://sks-keyservers.net/pks/lookup?op=get&search=0x3B6C5F1D2C7B6B02 Dominick Grift
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