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interfaces.pyo
� ��^c @ s� d Z d d l Z d d l Z d d l m Z d d l m Z d d l m Z d d l m Z d d l m Z d d d � � YZ d � Z d � Z d � Z d � Z d � Z d d d � � YZ d d d � � YZ d d d � � YZ d d d � � YZ d S( s7 Classes for representing and manipulating interfaces. i����Ni ( t access( t refpolicy( t objectmodel( t matching( t _t Paramc B sS e Z d Z d � Z d � Z d � Z e e e � Z e d d � � Z d � Z RS( s; Object representing a paramater for an interface. c C s1 d | _ t j | _ t j � | _ t | _ d S( Nt ( t _Param__nameR t SRC_TYPEt typet IdSett obj_classest Truet required( t self( ( s9 /usr/lib64/python2.7/site-packages/sepolgen/interfaces.pyt __init__& s c C s/ t j | � s" t d | � � n | | _ d S( Ns Name [%s] is not a param( R t is_idparamt ValueErrorR ( R t name( ( s9 /usr/lib64/python2.7/site-packages/sepolgen/interfaces.pyt set_name, s c C s | j S( N( R ( R ( ( s9 /usr/lib64/python2.7/site-packages/sepolgen/interfaces.pyt get_name1 s t fgetc C s t | j d � S( Ni ( t intR ( R ( ( s9 /usr/lib64/python2.7/site-packages/sepolgen/interfaces.pyt <lambda>6 s c C s* d | j t j | j d j | j � f S( Ns0 <sepolgen.policygen.Param instance [%s, %s, %s]>t ( R R t field_to_strR t joinR ( R ( ( s9 /usr/lib64/python2.7/site-packages/sepolgen/interfaces.pyt __repr__8 s ( t __name__t __module__t __doc__R R R t propertyR t numR ( ( ( s9 /usr/lib64/python2.7/site-packages/sepolgen/interfaces.pyR " s c C s+ d } | | k r� | | } | | j k r/ d S| t j k sM | t j k r� | j t j k sq | j t j k r� d } | r� | j g } n g } x6 t j | j | � D] } | t j k r� d } Pq� q� Wt j | _ q d } n( t � } | | _ | | _ | | | j <| r'| j j | j � n | S( Ni i ( R R R t TGT_TYPEt obj_classt itertoolst chainR R t implicitly_typed_objectsR R t add( R R t avt paramst rett pt avobjst obj( ( s9 /usr/lib64/python2.7/site-packages/sepolgen/interfaces.pyt __param_insert> s0 $ c C s d } t } t j | j � rK t | j t j | | � d k rK d } qK n t j | j � r� t | j t j | | � d k r� d } q� n t j | j � r� t | j t j | | � d k r� d } q� n xA | j D]6 } t j | � r� t | t � d k r d } q q� q� W| S( sj Extract the paramaters from an access vector. Extract the paramaters (in the form $N) from an access vector, storing them as Param objects in a dictionary. Some attempt is made at resolving conflicts with other entries in the dict, but if an unresolvable conflict is found it is reported to the caller. The goal here is to figure out how interface paramaters are actually used in the interface - e.g., that $1 is a domain used as a SRC_TYPE. In general an interface will look like this: interface(`foo', ` allow $1 foo : file read; ') This is simple to figure out - $1 is a SRC_TYPE. A few interfaces are more complex, for example: interface(`foo_trans',` domain_auto_trans($1,fingerd_exec_t,fingerd_t) allow $1 fingerd_t:fd use; allow fingerd_t $1:fd use; allow fingerd_t $1:fifo_file rw_file_perms; allow fingerd_t $1:process sigchld; ') Here the usage seems ambigious, but it is not. $1 is still domain and therefore should be returned as a SRC_TYPE. Returns: 0 - success 1 - conflict found i i ( t FalseR R t src_typeR- R R t tgt_typeR! R" t OBJ_CLASSt permst PERM( R' R( R) t found_srct perm( ( s9 /usr/lib64/python2.7/site-packages/sepolgen/interfaces.pyt av_extract_paramsj s $! ! ! c C s/ t j | j � r+ t | j t j d | � Sd S( N( R R t roleR- R t ROLEt None( R7 R( ( ( s9 /usr/lib64/python2.7/site-packages/sepolgen/interfaces.pyt role_extract_params� s c s� � f d � } d } | | j t j � r3 d } n | | j t j � rQ d } n | | j t j � ro d } n t j | j � r� t | j t j d � � r� d } q� n | S( Nc sK d } x> | D]6 } t j | � r t | | d � � rC d } qC q q W| S( Ni i ( R R R- R9 ( t setR R) t x( R( ( s9 /usr/lib64/python2.7/site-packages/sepolgen/interfaces.pyt extract_from_set� s i i ( t src_typesR R t tgt_typesR! R R1 R R t dest_typeR- t DEST_TYPER9 ( t ruleR( R= R) ( ( R( s9 /usr/lib64/python2.7/site-packages/sepolgen/interfaces.pyt type_rule_extract_params� s c C sQ d } xD | j D]9 } t j | � r t | t j d | � rI d } qI q q W| S( Ni i ( t argsR R R- R R R9 ( t ifcallR( R) t arg( ( s9 /usr/lib64/python2.7/site-packages/sepolgen/interfaces.pyt ifcall_extract_params� s t AttributeVectorc B s e Z d � Z d � Z RS( c C s d | _ t j � | _ d S( NR ( R R t AccessVectorSet( R ( ( s9 /usr/lib64/python2.7/site-packages/sepolgen/interfaces.pyR � s c C s | j j | � d S( N( R t add_av( R R' ( ( s9 /usr/lib64/python2.7/site-packages/sepolgen/interfaces.pyRJ � s ( R R R RJ ( ( ( s9 /usr/lib64/python2.7/site-packages/sepolgen/interfaces.pyRH � s t AttributeSetc B s# e Z d � Z d � Z d � Z RS( c C s i | _ d S( N( t attributes( R ( ( s9 /usr/lib64/python2.7/site-packages/sepolgen/interfaces.pyR � s c C s | | j | j <d S( N( RL R ( R t attr( ( s9 /usr/lib64/python2.7/site-packages/sepolgen/interfaces.pyt add_attr� s c C s� d � } d } x� | D]y } | d } | d d k r[ | rL | j | � n | | � } q | r | j d � } t j | � } | j | � q q W| r� | j | � n d S( Nc S sb | d d !j � } t | � d k s5 | d d k rH t d | � � n t � } | d | _ | S( Ni i����i i t Attributes# Syntax error Attribute statement %s( t splitt lent SyntaxErrorRH R ( t linet fieldst a( ( s9 /usr/lib64/python2.7/site-packages/sepolgen/interfaces.pyt parse_attr� s " i����i t [t ,( R9 RN RP R t AccessVectorRJ ( R t fdRV RU RS t lR' ( ( s9 /usr/lib64/python2.7/site-packages/sepolgen/interfaces.pyt from_file� s ( R R R RN R\ ( ( ( s9 /usr/lib64/python2.7/site-packages/sepolgen/interfaces.pyRK � s t InterfaceVectorc B sG e Z d i d � Z i d � Z d � Z d � Z d � Z d � Z RS( c C sP t | _ d | _ t j � | _ i | _ | rC | j | | � n t | _ d S( NR ( R t enabledR R RI R( t from_interfaceR. t expanded( R t interfaceRL ( ( s9 /usr/lib64/python2.7/site-packages/sepolgen/interfaces.pyR � s c C s� | j | _ xq | j � D]c } | j t j j k r: q n d | j k rO q n t j | � } x | D] } | j | � qe Wq W| rHx� | j � D]� } x� | j D]� } | | j k r� q� n | j | } xo | j D]d } t j | � } | j | j k r | j | _ n | j | j k r,| j | _ n | j | � q� Wq� Wq� Wn x) | j � D] } t | | j � rUqUqUWx) | j � D] } t | | j � r�q�q�Wx) | j � D] } t | | j � r�q�q�Wd S( Nt dontaudit( R t avrulest rule_typeR t AVRulet ALLOWR t avrule_to_access_vectorsRJ t typeattributesRL t copyR/ R R0 t rolesR: R( t typerulesRC t interface_callsRG ( R Ra RL t avrulet avsR' t typeattributeRM t attr_vecRU R7 RB RE ( ( s9 /usr/lib64/python2.7/site-packages/sepolgen/interfaces.pyR_ s> c C s/ t | | j � d k r n | j j | � d S( Ni ( R6 R( R RJ ( R R' ( ( s9 /usr/lib64/python2.7/site-packages/sepolgen/interfaces.pyRJ 8 s c C sN g } | j d | j � x$ | j D] } | j t | � � q$ Wd j | � S( Ns [InterfaceVector %s]s ( t appendR R t strR ( R t sR' ( ( s9 /usr/lib64/python2.7/site-packages/sepolgen/interfaces.pyt to_string> s c C s | j � S( N( R ( R ( ( s9 /usr/lib64/python2.7/site-packages/sepolgen/interfaces.pyt __str__E s c C s d | j | j f S( Ns <InterfaceVector %s:%s>( R R^ ( R ( ( s9 /usr/lib64/python2.7/site-packages/sepolgen/interfaces.pyR H s N( R R R9 R R_ RJ Rt Ru R ( ( ( s9 /usr/lib64/python2.7/site-packages/sepolgen/interfaces.pyR] � s 4 t InterfaceSetc B s� e Z d d � Z d � Z d � Z d � Z d � Z d � Z i d � Z d i d � Z d � Z d � Z d � Z d � Z RS( c C s( i | _ i | _ g | _ | | _ d S( N( t interfacest tgt_type_mapt tgt_type_allt output( R Rz ( ( s9 /usr/lib64/python2.7/site-packages/sepolgen/interfaces.pyR M s c C s$ | j r | j j | d � n d S( Ns ( Rz t write( R Rr ( ( s9 /usr/lib64/python2.7/site-packages/sepolgen/interfaces.pyt oS s c C s� x� t | j j � d d � �D]� } | j d | j � xJ t | j j � d d � �D]* } | j d | j t j | j f � qX W| j d � t | j j � � } x1 | D]) } | j d j | � � | j d � q� Wq Wd S( Nt keyc S s | j S( N( R ( R< ( ( s9 /usr/lib64/python2.7/site-packages/sepolgen/interfaces.pyR X s s [InterfaceVector %s c S s | j S( N( R ( R< ( ( s9 /usr/lib64/python2.7/site-packages/sepolgen/interfaces.pyR Z s s %s:%s s ] RX s ( t sortedRw t valuesR{ R R( R R R R t to_listR ( R RZ t ivt paramt avlR' ( ( s9 /usr/lib64/python2.7/site-packages/sepolgen/interfaces.pyt to_fileW s %%( c C s� d � } d } x� | D]y } | d } | d d k r[ | rL | j | � n | | � } q | r | j d � } t j | � } | j | � q q W| r� | j | � n | j � d S( Nc S s� | d d !j � } t | � d k s5 | d d k rH t d | � � n t � } | d | _ t | � d k rt d Sx� | d D]t } | j d � } t | � d k r� t d | � � n t � } | d | _ t j | d | _ | | j | j <q W| S( Ni i����i i R] s) Syntax error InterfaceVector statement %st :s- Invalid param in InterfaceVector statement %s( RP RQ RR R] R R R t str_to_fieldR R( ( RS RT t ifvt fieldR* R� ( ( s9 /usr/lib64/python2.7/site-packages/sepolgen/interfaces.pyt parse_ifvc s " i����i RW RX ( R9 t add_ifvRP R RY RJ t index( R RZ R� R� RS R[ R' ( ( s9 /usr/lib64/python2.7/site-packages/sepolgen/interfaces.pyR\ b s c C s | | j | j <d S( N( Rw R ( R R� ( ( s9 /usr/lib64/python2.7/site-packages/sepolgen/interfaces.pyR� � s c C s� x� | j j � D]� } t � } xP | j D]E } t j | j � r^ | j j | � t � } Pn | j | j � q) Wx0 | D]( } | j j | g � } | j | � qy Wq Wd S( N( Rw R R; R R R0 Ry Rq R& Rx t setdefault( R R� R? R' R R[ ( ( s9 /usr/lib64/python2.7/site-packages/sepolgen/interfaces.pyR� � s c C s t | | � } | j | � d S( N( R] R� ( R Ra RL R� ( ( s9 /usr/lib64/python2.7/site-packages/sepolgen/interfaces.pyR& � s c C sT x6 t j | j � | j � � D] } | j | | � q W| j | � | j � d S( N( R# R$ Rw t templatesR& t expand_ifcallsR� ( R t headersRz RL t i( ( s9 /usr/lib64/python2.7/site-packages/sepolgen/interfaces.pyt add_headers� s % c C sq t j | � rf t | d � } | t | j � k r8 d S| j | d } t | t � r\ | S| g Sn | g Sd S( Ni ( R R R RQ RD R9 t isinstancet list( R t idRE R RF ( ( s9 /usr/lib64/python2.7/site-packages/sepolgen/interfaces.pyt map_param� s c C s& | j | j | � } | d k r% d S| j | j | � } | d k rJ d S| j | j | � } | d k ro d St j � } xB | j D]7 } | j | | � } | d k r� q� q� | j | � q� Wt | � d k r� d SxI | D]A } x8 | D]0 } x' | D] } | j j | | | | � q� Wq� Wq� Wd S( Ni ( R� R/ R9 R0 R" R R R2 t updateRQ R R& ( R R� R' RE R> R? R t new_permsR5 R* R/ R0 R" ( ( s9 /usr/lib64/python2.7/site-packages/sepolgen/interfaces.pyt map_add_av� s* c C sD | d f g } | j | j } t | _ xt | � d k r?| j d � \ } } | j | j } | | k r� x$ | j D] } | j | | | � qx W| j r� q+ q� n x� | j � D]� } | j | j k r� | j t d � � d Sy | | j } Wn. t k r$| j t d | j � � q� n X| j | | f � q� Wq+ Wd S( Ni i����s Found circular interface classs# Missing interface definition for %s( R9 Rw R R R` RQ t popR R� Rl t ifnameR| R t KeyErrorRq ( R Ra t if_by_namet stackR� t curt cur_ifcallt cur_ifvR' RE t newif( ( s9 /usr/lib64/python2.7/site-packages/sepolgen/interfaces.pyt do_expand_ifcalls� s* c C sy i } x3 t j | j � | j � � D] } | | | j <q% Wx6 t j | j � | j � � D] } | j | | � q[ Wd S( N( R# R$ Rw R� R R� ( R R� R� R� Ra ( ( s9 /usr/lib64/python2.7/site-packages/sepolgen/interfaces.pyR� � s %%N( R R R9 R R| R� R\ R� R� R& R� R� R� R� R� ( ( ( s9 /usr/lib64/python2.7/site-packages/sepolgen/interfaces.pyRv L s # $( ( ( ( ( ( R Ri R# R R R R R t sepolgeni18nR R R- R6 R: RC RG RH RK R] Rv ( ( ( s9 /usr/lib64/python2.7/site-packages/sepolgen/interfaces.pyt <module> s" , 9 Z