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3 O+e�U � @ s� d dl Z d dlZd dlmZmZ d dlmZ d dlZd dl m Z m Z ddl m Z mZ ddlmZ dgZed d d d d dddg�Zed ddddg�ZG dd� d�ZG dd� d�ZdS )� N)� defaultdict� namedtuple)�suppress)� NetworkXError�NetworkXNoPath� )� EdgeAttrDict� EdgeAttrList)� TERuletype�DomainTransitionAnalysis�step�source�target� transition� entrypoints�setexec� dyntransition� setcurrent�name� entrypoint�execute�type_transitionc @ s� e Zd ZdZd!dd�Zedd� �Zejdd� �Zed d � �Zejd d � �Zd d � Z d"dd�Z dd� Z dd� Z dd� Z edd� �Zdd� Zdd � Zd d � Zd d � ZdS )#r zDomain transition analysis.FNc C s> t jt�| _|| _|| _|| _d| _d| _t j � | _ d| _ dS )zD Parameter: policy The policy to analyze. TN) �loggingZ getLogger�__name__�log�policy�exclude�reverse� rebuildgraph�rebuildsubgraph�nxZDiGraph�G�subG)�selfr r r � r$ �/usr/lib64/python3.6/dta.py�__init__6 s z!DomainTransitionAnalysis.__init__c C s | j S )N)�_reverse)r# r$ r$ r% r E s z DomainTransitionAnalysis.reversec C s t |�| _d| _d S )NT)�boolr' r )r# � directionr$ r$ r% r I s c C s | j S )N)�_exclude)r# r$ r$ r% r N s z DomainTransitionAnalysis.excludec s* |r� fdd�|D �� _ ng � _ d� _d S )Nc s g | ]}� j j|��qS r$ )r � lookup_type)�.0�t)r# r$ r% � <listcomp>U s z4DomainTransitionAnalysis.exclude.<locals>.<listcomp>T)r* r )r# �typesr$ )r# r% r R s c c sj | j j|�}| j j|�}| jr&| j� | jjdj||�� tt�� | j t j | j ||��V W dQ R X dS )a� Generator which yields one shortest domain transition path between the source and target types (there may be more). Parameters: source The source type. target The target type. Yield: generator(steps) steps A generator that returns the tuple of source, target, and rules for each domain transition. z8Generating one domain transition path from {0} to {1}...N) r r+ r �_build_subgraphr �info�formatr r �)_DomainTransitionAnalysis__generate_stepsr � shortest_pathr" )r# r r �sr- r$ r$ r% r4 [ s z&DomainTransitionAnalysis.shortest_path� c c s� |dk rt d��| jj|�}| jj|�}| jr6| j� | jjdj|||�� tt ��. x&t j | j |||�D ]}| j |�V qjW W dQ R X dS )a� Generator which yields all domain transition paths between the source and target up to the specified maximum path length. Parameters: source The source type. target The target type. maxlen Maximum length of paths. Yield: generator(steps) steps A generator that returns the tuple of source, target, and rules for each domain transition. r z%Maximum path length must be positive.zIGenerating all domain transition paths from {0} to {1}, max length {2}...N)� ValueErrorr r+ r r0 r r1 r2 r r r Zall_simple_pathsr" r3 )r# r r �maxlenr5 r- �pathr$ r$ r% � all_pathsx s z"DomainTransitionAnalysis.all_pathsc c sx | j j|�}| j j|�}| jr&| j� | jjdj||�� tt��, x$t j | j ||�D ]}| j |�V qVW W dQ R X dS )a� Generator which yields all shortest domain transition paths between the source and target types. Parameters: source The source type. target The target type. Yield: generator(steps) steps A generator that returns the tuple of source, target, and rules for each domain transition. zBGenerating all shortest domain transition paths from {0} to {1}...N) r r+ r r0 r r1 r2 r r r �all_shortest_pathsr" r3 )r# r r r5 r- r9 r$ r$ r% r; � s z+DomainTransitionAnalysis.all_shortest_pathsc c s� | j j|�}| jr| j� | jjdj|| jr0dnd�� tt ��n xf| j j |�D ]V\}}t | j ||�}| jrx|| }}n || }}t |||j| j|�|j|j|j�V qPW W dQ R X dS )aM Generator which yields all domain transitions out of a specified source type. Parameters: type_ The starting type. Yield: generator(steps) steps A generator that returns the tuple of source, target, and rules for each domain transition. z)Generating all domain transitions {1} {0}zin tozout fromN)r r+ r r0 r r1 r2 r r r r" Z out_edges�Edge� step_outputr �/_DomainTransitionAnalysis__generate_entrypointsr r r )r# Ztype_r5 r r �edge� real_source� real_targetr$ r$ r% � transitions� s" z$DomainTransitionAnalysis.transitionsc C s | j r| j� tj| j�S )zR Get the domain transition graph statistics. Return: str )r � _build_graphr r1 r! )r# r$ r$ r% � get_stats� s z"DomainTransitionAnalysis.get_statsc s � fdd�� j D �S )a� Creates a list of entrypoint, execute, and type_transition rules for each entrypoint. Parameter: data The dictionary of entrypoints. Return: list of tuple(type, entry, exec, trans) type The entrypoint type. entry The list of entrypoint rules. exec The list of execute rules. trans The list of type_transition rules. c s, g | ]$}t |� j| � j| � j| ��qS r$ )�entrypoint_outputr r r )r, �e)r? r$ r% r. s zCDomainTransitionAnalysis.__generate_entrypoints.<locals>.<listcomp>)r )r? r$ )r? r% Z__generate_entrypoints� s z/DomainTransitionAnalysis.__generate_entrypointsc c s~ xxt dt|��D ]f}||d }|| }t| j||�}| jrH|| }}n || }}t|||j| j|�|j|j |j �V qW dS )a Generator which yields the source, target, and associated rules for each domain transition. Parameter: path A list of graph node names representing an information flow path. Yield: tuple(source, target, transition, entrypoints, setexec, dyntransition, setcurrent) source The source type for this step of the domain transition. target The target type for this step of the domain transition. transition The list of transition rules. entrypoints Generator which yields entrypoint-related rules. setexec The list of setexec rules. dyntranstion The list of dynamic transition rules. setcurrent The list of setcurrent rules. r N) �range�lenr< r" r r= r r> r r r )r# r9 r5 r r r? r@ rA r$ r$ r% Z__generate_steps s z)DomainTransitionAnalysis.__generate_stepsc C s� | j j� dj| j�| j _| jjdj| j�� tt�}tt�}tdd� �}tdd� �}tdd� �}�x4| jj � D �]$}|j t j k�r8|j dkr�qp|j}|j dk�r�d |kr�xJtj|jj� |jj� �D ].\}} || kr�t| j || d d �} | jj|� q�W d |k�rPxNtj|jj� |jj� �D ]2\}} || k�rt| j || d d �} | jj|� �qW d |k�r~x"|jj� D ]}|| j|� �qfW d|k�r6x�|jj� D ]}|| j|� �q�W n�d|k�r�x8tj|jj� |jj� �D ] \}} || | j|� �q�W d|k�r�x�tj|jj� |jj� �D ] \}} || | j|� �qW qp|j t jkrp|j dk�rRqp|j} x<tj|jj� |jj� �D ] \}} || | | j|� �qrW qpW g } g }g }�x�| j j� D �]�\}} t| j || �} d}d}| j�r�t|| j � �}t|| j � �}|j |�}|�sd }n�x�|D ]�}||k�s4|| | �rh| j | || | 7 < | j | || | 7 < || | | �r| j| || | | 7 < �qW ||k�r�| j j!|| � | j �r�| j �r�d }nd }| j�r ||k�r�| j"j!|| � nd }nd }|�r |�r | j| � n"|�r.|j| � n|�r�|j| � �q�W | j j#| � x"|D ]} | `| ` | ` | `| ` �qVW x|D ]} | `| `"�qzW d| _$d | _%| jjd� | jj&djt'j(| j �t'j)| j ��� d S )Nz Domain transition graph for {0}.z,Building domain transition graph from {0}...c S s t t�S )N)r �listr$ r$ r$ r% �<lambda>n s z7DomainTransitionAnalysis._build_graph.<locals>.<lambda>c S s t t�S )N)r rI r$ r$ r$ r% rJ o s c S s t dd� �S )Nc S s t t�S )N)r rI r$ r$ r$ r% rJ r s zIDomainTransitionAnalysis._build_graph.<locals>.<lambda>.<locals>.<lambda>)r r$ r$ r$ r% rJ r s �process�filer T)�creater r r r r Fz+Completed building domain transition graph.z$Graph stats: nodes: {0}, edges: {1}.)rK rL )*r! �clearr2 r r r r1 r rI ZterulesZruletyper ZallowZtclass�perms� itertools�productr �expandr r< r �appendr r �default�edges�set�keys� intersectionr r r �extendr �remove_edges_fromr r �debugr �number_of_nodes�number_of_edges)r# r r r r Z type_transZrulerO r5 r- r? rF �dZ invalid_edgeZclear_transitionZclear_dyntransitionZ invalid_transZinvalid_dyntrans�entryZexe�match�mr$ r$ r% rC a s� " " " " $ z%DomainTransitionAnalysis._build_graphc C s� g }x�| j j� D ]�\}}t| j ||�}t|j�}|j| j� |sBqx8|D ]0}|j|= |j|= tt �� |j |= W d Q R X qHW |j r|j r|j |� qW | j j |� d S )N)r" rU r< rV r �intersection_updater r r �KeyErrorr r rS rZ )r# Z invalid_edgesr r r? r rF r$ r$ r% Z __remove_excluded_entrypoints� s z6DomainTransitionAnalysis.__remove_excluded_entrypointsc C s� | j r| j� | jjd� | jjdj| j�� | jjdj| j�� | jrZ| jjdd�| _ n | jj � | _ | jr�| j j | j� | j � d| _ | jjd� | jjdjtj| j �tj| j ��� d S ) Nz$Building domain transition subgraph.z Excluding {0}z Reverse {0}T)�copyFz.Completed building domain transition subgraph.z'Subgraph stats: nodes: {0}, edges: {1}.)r rC r r1 r[ r2 r r r! r" rd Zremove_nodes_from�6_DomainTransitionAnalysis__remove_excluded_entrypointsr r r\ r] )r# r$ r$ r% r0 s z(DomainTransitionAnalysis._build_subgraph)FN)r6 )r � __module__� __qualname__�__doc__r& �propertyr �setterr r4 r: r; rB rD � staticmethodr> r3 rC re r0 r$ r$ r$ r% r 2 s" $ ' ^ c @ sb e Zd ZdZed�Zed�Zed�Zed�Ze d�Z e d�Z e d�Z dd d �Z d d � Zdd� ZdS )r< aS A graph edge. Also used for returning domain transition steps. Parameters: graph The NetworkX graph. source The source type of the edge. target The target tyep of the edge. Keyword Parameters: create (T/F) create the edge if it does not exist. The default is False. r r r r r r r Fc C sj || _ || _|| _| j j||�sf|s.td��n8| j j||� d | _d | _d | _d | _ d | _ d | _ d | _ d S )Nz Edge does not exist in graph) r! r r Zhas_edger7 Zadd_edger r r r r r r )r# Zgraphr r rM r$ r$ r% r& E s z Edge.__init__c s4 t |t�r&� fdd�t|jd�� D �S � j|�S d S )Nc s g | ]}� j |��qS r$ )�_index_to_item)r, �i)r# r$ r% r. [ s z$Edge.__getitem__.<locals>.<listcomp>r6 )� isinstance�slicerG �indicesrl )r# �keyr$ )r# r% � __getitem__W s zEdge.__getitem__c C s. |dkr| j S |dkr | jS tdj|���dS )z'Return source or target based on index.r r z,Invalid index (edges only have 2 items): {0}N)r r � IndexErrorr2 )r# �indexr$ r$ r% rl _ s zEdge._index_to_itemN)F)r rf rg rh r r r r r r r r r r& rr rl r$ r$ r$ r% r< . s r< )rP r � collectionsr r � contextlibr Znetworkxr Znetworkx.exceptionr r Z descriptorsr r Z policyrepr �__all__r= rE r r< r$ r$ r$ r% �<module> s2
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