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Edit File: matching.pyo
� ��^c @ s� d Z d d l Z d d l m Z d d l m Z d d l m Z d e j f d � � YZ d d d � � YZ d d d � � YZ d S( sI Classes and algorithms for matching requested access to access vectors. i����Ni ( t access( t objectmodel( t utilt Matchc B s e Z d d d � Z d � Z RS( i c C s( | | _ | | _ t | _ d | _ d S( N( t interfacet distt Falset info_dir_changet Nonet __hash__( t selfR R ( ( s7 /usr/lib64/python2.7/site-packages/sepolgen/matching.pyt __init__ s c C sT y5 | j | j f } | j | j f } | | | � SWn t t f k rO t SXd S( N( R R t AttributeErrort TypeErrort NotImplemented( R t othert methodt at b( ( s7 /usr/lib64/python2.7/site-packages/sepolgen/matching.pyt _compare( s N( t __name__t __module__R R R ( ( ( s7 /usr/lib64/python2.7/site-packages/sepolgen/matching.pyR s t MatchListc B sM e Z d Z d � Z d � Z d � Z d � Z d � Z d � Z d � Z RS( i� c C s4 g | _ g | _ | j | _ t | _ d | _ d S( N( t childrent bastardst DEFAULT_THRESHOLDt thresholdR t allow_info_dir_changeR t av( R ( ( s7 /usr/lib64/python2.7/site-packages/sepolgen/matching.pyR 3 s c C s8 t | j � r | j d St | j � r4 | j d Sd S( Ni ( t lenR R R ( R ( ( s7 /usr/lib64/python2.7/site-packages/sepolgen/matching.pyt best< s c C s t | j � t | j � S( N( R R R ( R ( ( s7 /usr/lib64/python2.7/site-packages/sepolgen/matching.pyt __len__C s c C s t | j � S( N( t iterR ( R ( ( s7 /usr/lib64/python2.7/site-packages/sepolgen/matching.pyt __iter__I s c C s t j | j | j � S( N( t itertoolst chainR R ( R ( ( s7 /usr/lib64/python2.7/site-packages/sepolgen/matching.pyt allL s c C s_ | j | j k rK | j s% | j r8 | j j | � q[ | j j | � n | j j | � d S( N( R R R R R t appendR ( R t match( ( s7 /usr/lib64/python2.7/site-packages/sepolgen/matching.pyR% O s c C s | j j � | j j � d S( N( R t sortR ( R ( ( s7 /usr/lib64/python2.7/site-packages/sepolgen/matching.pyR' X s ( R R R R R R R! R$ R% R' ( ( ( s7 /usr/lib64/python2.7/site-packages/sepolgen/matching.pyR 1 s t AccessMatcherc B sA e Z d d � Z d � Z d � Z d � Z d � Z d � Z RS( c C s@ d | _ d | _ | r$ | | _ n t j � | _ d | _ d S( Ni id ( t type_penaltyt obj_penaltyt perm_mapsR t PermMappingst info_dir_penalty( R R+ ( ( s7 /usr/lib64/python2.7/site-packages/sepolgen/matching.pyR ^ s c C s+ | | k s t j | � r d S| j Sd S( Ni ( R t is_idparamR) ( R R R ( ( s7 /usr/lib64/python2.7/site-packages/sepolgen/matching.pyt type_distancej s c C ss | j j | j � } t | � d k rD | j j | j | � } | S| j j | j � } | j j | j | � Sd S( Ni ( t permst differenceR R+ t getdefault_distancet obj_class( R t av_reqt av_provt difft total( ( s7 /usr/lib64/python2.7/site-packages/sepolgen/matching.pyt perm_distanceq s c C s d } | | j | j | j � 7} | | j | j | j � 7} | j | j k rs t j | j � rs | | j 8} n | d k r� | j j | j | j � } n | j | | � } | d k r� | d k r� | | S| | Sn+ | d k r| d k r� | | S| | Sn d S( s+ Determine the 'distance' between 2 access vectors. This function is used to find an access vector that matches a 'required' access. To do this we comput a signed numeric value that indicates how close the req access is to the 'provided' access vector. The closer the value is to 0 the closer the match, with 0 being an exact match. A value over 0 indicates that the prov access vector provides more access than the req (in practice, this means that the source type, target type, and object class is the same and the perms in prov is a superset of those in req. A value under 0 indicates that the prov access less - or unrelated - access to the req access. A different type or object class will result in a very low value. The values other than 0 should only be interpreted relative to one another - they have no exact meaning and are likely to change. Params: req - [AccessVector] The access that is required. This is the access being matched. prov - [AccessVector] The access provided. This is the potential match that is being evaluated for req. Returns: 0 : Exact match between the acess vectors. < 0 : The prov av does not provide all of the access in req. A smaller value indicates that the access is further. > 0 : The prov av provides more access than req. The larger the value the more access over req. i N( R/ t src_typet tgt_typeR3 R R. 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