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//usr/lib/python2.4/site-packages/sepolgen/matching.pyc
mò ö"žQc @ s^ d Z d k Z d k Z d k Z d f d „ ƒ YZ d f d „ ƒ YZ d f d „ ƒ YZ d S( sI Classes and algorithms for matching requested access to access vectors. Nt Matchc B s t Z d d d „ Z d „ Z RS( Ni c C s | | _ | | _ t | _ d S( N( t interfacet selft distt Falset info_dir_change( R R R ( ( t5 /usr/lib/python2.4/site-packages/sepolgen/matching.pyt __init__ s c C st | i | i j o> | i o | i o d SqM d Sqp | i o d Sqp d Sn | i | i j o d Sn d Sd S( Ni i iÿÿÿÿ( R R t otherR ( R R ( ( R t __cmp__" s ( t __name__t __module__t NoneR R ( ( ( R R s t MatchListc B sM t Z d Z d „ Z d „ Z d „ Z d „ Z d „ Z d „ Z d „ Z RS( Nix c C s4 g | _ g | _ | i | _ t | _ d | _ d S( N( R t childrent bastardst DEFAULT_THRESHOLDt thresholdR t allow_info_dir_changeR t av( R ( ( R R 6 s c C s' t | i ƒ o | i d Sn d Sd S( Ni ( t lenR R R ( R ( ( R t best? s c C s t | i ƒ S( N( R R R ( R ( ( R t __len__E s c C s t | i ƒ S( N( t iterR R ( R ( ( R t __iter__K s c C s t i | i | i ƒ S( N( t itertoolst chainR R R ( R ( ( R t allN s c C sd | i | i j o= | i p | i o | i i | ƒ q` | i i | ƒ n | i i | ƒ d S( N( t matchR R R R R R t appendR ( R R ( ( R R Q s c C s | i i ƒ | i i ƒ d S( N( R R t sortR ( R ( ( R R Z s ( R R R R R R R R R R ( ( ( R R 4 s t AccessMatcherc B sA t Z d d „ Z d „ Z d „ Z d „ Z d „ Z d „ Z RS( Nc C sB d | _ d | _ | o | | _ n t i ƒ | _ d | _ d S( Ni id ( R t type_penaltyt obj_penaltyt perm_mapst objectmodelt PermMappingst info_dir_penalty( R R" ( ( R R ` s c C s1 | | j p t i | ƒ o d Sn | i Sd S( Ni ( t at bt accesst is_idparamR R ( R R& R' ( ( R t type_distancel s c C sx | i i | i ƒ } t | ƒ d j o! | i i | i | ƒ } | Sn, | i i | i ƒ } | i i | i | ƒ Sd S( Ni ( t av_reqt permst differencet av_provt diffR R R" t getdefault_distancet obj_classt total( R R+ R. R/ R2 ( ( R t perm_distances s c C s d } | | i | i | i ƒ 7} | | i | i | i ƒ 7} | i | i j o% t i | i ƒ o | | i 8} n | d j o | i i | i | i ƒ } n | i | | ƒ } | d j o% | d j o | | Sq| | Sn3 | d j o% | d j o | | Sq| | 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 R R* t reqt src_typet provt tgt_typeR1 R( R) R! R" R0 R, t pdistR3 ( R R4 R6 R R8 ( ( R t av_distance~ s" # ' c C se d } x“ | D]‹ } | i | | ƒ } | d j o | } q | d j o* | d j o | | 7} q˜ | | } q | d j o | | 7} q | | 8} q W| i i | i | i ƒ } | i d j oF t i | _ x7 | D]+ } | i | i i | i | i ƒ B| _ qÚ Wn | t i @d j o@ | i t i @o/ | d j o | | i 8} qa| | i 7} n | S( s i N( R R t av_sett xR R9 R t tmpR" t getdefault_directionR1 R, t av_dirt info_dirR# t FLOW_NONEt FLOW_WRITER% ( R R: R R< R R; R> ( ( R t av_set_matchÆ s2 -% c C sœ | | _ x‚ t i | i | i i | i g ƒ ƒ D]Y } | i p q1 n | i | i | ƒ } | d j o t | | ƒ } | i | ƒ q1 q1 W| i ƒ d S( Ni ( R t match_listR R t ifsett tgt_type_allt tgt_type_mapt getR7 t ivt enabledR RB R( R R t mR R ( R RD R RC R RJ RH ( ( R t search_ifsî s ( R R R R R* R3 R9 RB RK ( ( ( R R _ s H (( t __doc__R( R# R R R R ( R R# R( R R R ( ( R t ? s +