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classes and algorithms for the generation of SELinux policy.
Ni i i t PolicyGeneratorc B sq t Z d Z e d „ Z e e d „ Z e d „ Z e d „ Z d „ Z
d d „ Z d „ Z d „ Z
d
„ Z RS( s¤ Generate a reference policy module from access vectors.
PolicyGenerator generates a new reference policy module
or updates an existing module based on requested access
in the form of access vectors.
It generates allow rules and optionally module require
statements and reference policy interfaces. By default
only allow rules are generated. The methods .set_gen_refpol
and .set_gen_requires turns on interface generation and
requires generation respectively.
PolicyGenerator can also optionally add comments explaining
why a particular access was allowed based on the audit
messages that generated the access. The access vectors
passed in must have the .audit_msgs field set correctly
and .explain set to SHORT|LONG_EXPLANATION to enable this
feature.
The module created by PolicyGenerator can be passed to
output.ModuleWriter to output a text representation.
c C sB d | _ t | _ t | _ | o
| | _ n t i
ƒ | _ d S( sø Initialize a PolicyGenerator with an optional
existing module.
If the module paramater is not None then access
will be added to the passed in module. Otherwise
a new reference policy module will be created.
N( t Nonet selft ifgent NO_EXPLANATIONt explaint Falset gen_requirest modulet moduelt refpolicyt Module( R R ( ( t8 /usr/lib64/python2.4/site-packages/sepolgen/policygen.pyt __init__> s
c C s= | o t | | ƒ | _ t | _ n
d | _ | i ƒ d S( s? Set whether reference policy interfaces are generated.
To turn on interface generation pass in an interface set
to use for interface generation. To turn off interface
generation pass in None.
If interface generation is enabled requires generation
will also be enabled.
N( t if_sett InterfaceGeneratort perm_mapsR R t TrueR R t" _PolicyGenerator__set_module_style( R R R ( ( R t set_gen_refpolN s
c C s
| | _ d S( s& Set whether module requires are generated.
Passing in true will turn on requires generation and
False will disable generation. If requires generation is
disabled interface generation will also be disabled and
can only be re-enabled via .set_gen_refpol.
N( t statusR R ( R R ( ( R t set_gen_requires` s c C s
| | _ d S( s) Set whether access is explained.
N( R R ( R R ( ( R t set_gen_explainj s c C sA | i o
t } n t } x | i i ƒ D] } | | _ q* Wd S( N( R R R R
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R ( ( R t __set_module_styleo s
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| | _ | i o
t
| _ n
t | _ d S( s? Set the name of the module and optionally the version.
i N( R t mR R R R R
t ModuleDeclarationt childrent insertt namet versionR R R ( R R R R R ( ( R t set_module_namew s
c C s | i S( s Return the generated moduleN( R R ( R ( ( R t
get_moduleˆ s c C sf x_ | D]W } t i | ƒ } | i o% t i t | d | i ƒƒ | _ n | i
i i | ƒ q Wd S( Nt verbosity(
t avst avR
t AVRulet ruleR R t Commentt explain_accesst commentR R t append( R R# R& R$ ( ( R t __add_allow_rulesΠs
%c C sq | i o5 | i i | | i ƒ \ } } | i i i | ƒ n | } | i
| ƒ | i o t | i ƒ n d S( sJ Add the access from the access vector set to this
module.
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add_access” s
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__module__t __doc__R R
R R R t SHORT_EXPLANATIONR R R R! R1 R2 ( ( ( R R ' s
c s† g ‰ ‡ ‡ d † } | t j oÕ xÇ | i D]¼ } ˆ i d | i ƒ ˆ i d t | i
ƒ t | i ƒ f ƒ ˆ i d | i t
i | i ƒ f ƒ ˆ i d | i | i | i f ƒ ˆ i t i d | i d d d d
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| i | i | i | i i ƒ f ƒ t | i ƒ d j o4 | i d } ˆ i d | i | i | i f ƒ n | ƒ n ˆ S( sª Explain why a policy statement was generated.
Return a string containing a text explanation of
why a policy statement was generated. The string is
commented and wrapped and can be directly inserted
into a policy.
Params:
av - access vector representing the access. Should
have .audit_msgs set appropriately.
verbosity - the amount of explanation provided. Should
be set to NO_EXPLANATION, SHORT_EXPLANATION, or
LONG_EXPLANATION.
Returns:
list of strings - strings explaining the access or an empty
string if verbosity=NO_EXPLANATION or there is not sufficient
information to provide an explanation.
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Rl R, R: ( ( ( R R þ s c C s. d „ } x | i ƒ D] } | | ƒ q Wd S( s* Add require statements to the module.
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