setrans.conf man page

setrans.conf — translation configuration file for MCS/MLS SELinux systems

Description

The /etc/selinux/{SELINUXTYPE}/setrans.conf configuration file specifies the way that SELinux MCS/MLS labels are translated into human readable form by the mcstransd daemon. The default policies support 16 sensitivity levels (s0 through s15) and 1024 categories (c0 through c1023). Multiple categories can be separated with commas (c0,c1,c3,c5) and a range of categories can be shortened using dot notation (c0.c3,c5).

Keywords

Base
once a base is declared, subsequent sensitivity label definitions will have all modifiers applied to them during translation. Sensitivity labels defined before the base declaration are immediately cached and no modifiers will be applied these are used as direct translations.
Default
defines the category bit range that will be used for inverse bits.
Domain
creates a new domain with the supplied name.
Include
read and process the contents of the specified configuration file.
Join
defines a character used to separate members of a modifier group when more than one is specified (ex. USA/AUS).
ModifierGroup
a means of grouping category bit definitions by how they modify the sensitivity label.
Prefix
word(s) that may proceed member(s) of a modifier group (ex. REL USA).
Suffix
word(s) that may follow member(s) of a modifier group (ex. USA EYES ONLY).
Whitespace
defines the set of acceptable white space characters that may be used in label being translated.

Sensitivity Level Definition Examples

s0=SystemLow
defines a translation of s0 (the lowest sensitivity level) with no categories to SystemLow.
s15:c0.c1023=SystemHigh
defines a translation of s15:c0.c1023 to SystemHigh. c0.c1023 is shorthand for all categories. A colon separates the sensitivity level and categories.
s0-s15:c0.c1023=SystemLow-SystemHigh
defines a range translation of of s0-s15:c0.c1023 to SystemLow-SystemHigh. The two range components are separated by a dash.
s0:c0=PatientRecord
defines a translation of sensitivity s0 with category c0 to PatientRecord.
s0:c1=Accounting
defines a translation of sensitivity s0 with category c1 to Accounting.
s2:c1,c2,c3=Confidential3Categories
s2:c1.c3=Confidential3Categories
both define a translation of sensitivity s2 with categories c1, c2 and c3 to Confidential3Categories.
s5=TopSecret
defines a translation of sensitivity s5 with no categories to TopSecret.

Constraint Examples

c0!c1
if category bits 0 and 1 are both set, the constraint will fail and the original context will be returned.
c5.c9>c1
if category bits 5 through 9 are set, bit 1 must also be set or the constraint will fail and the original context will be returned.
s1!c5,c9
if category bits 5 and 9 are set and the sensitivity level is s1, the constraint will fail and the original context will be returned.

Author

Written by Joe Nall <joe@nall.com>.
Updated by Ted X. Toth <txtoth@gmail.com>.

See Also

selinux(8), mcs(8), mls(8), chcon(1)

Files

/etc/selinux/{SELINUXTYPE}/setrans.conf
/usr/share/mcstrans/examples

Info

13 July 2010 txtoth@gmail.com setrans.conf documentation