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permmap.cpython-39.pyc
a q�qe�@ � @ s� d dl Z d dlZd dlmZ d dlmZ d dlmZmZm Z m Z m Z m Z d dl Z ddlmZ ddlmZ ddlmZmZmZ d ZdZd ZG d d � d e �Zeed �dd�Ze e d�dd�Z ee ee ee e e e ef f f f Z G dd� d�Z G dd� d�Z!dS )� N)� OrderedDict)�suppress)�cast�Dict�Iterable� NamedTuple�Optional�Union� )� exception)�PermissionMapDescriptor)�AVRule� SELinuxPolicy� TERuletype)�r�w�b�n�u� c @ s" e Zd ZU dZeed< eed< dS )� RuleWeightzDThe read and write weights for a rule, given all of its permissions.�read�writeN)�__name__� __module__� __qualname__�__doc__�int�__annotations__� r r �5/usr/lib64/python3.9/site-packages/setools/permmap.pyr s r )�weight�returnc C s( t | krtks$n td�| ���| S )Nz$Permission weights must be 1-10: {0})� MIN_WEIGHT� MAX_WEIGHT� ValueError�format)r! r r r �validate_weight! s r' )� directionr" c C s | t vrtd�| ���| S )Nz'Invalid information flow direction: {0})�INFOFLOW_DIRECTIONSr% r& )r( r r r �validate_direction( s r* c @ sf e Zd ZU dZede�Zede�Zede �Z e e d< e e d< de e e e dd �d d �Ze d �d d�ZdS )�Mappingz1A mapping for a permission in the permission map.r! r( �enabled�class_�permFN)�perm_map� classname� permission�creater" c C s� || _ || _|| _|rD|| j vr,t� | j |< dddd�| j | |< n:|| j vr^t�d�|���|| j | vr~t�d�||���d S )Nr r T)r( r! r, �{0} is not mapped.z{0}:{1} is not mapped.)Z _perm_mapr- r. r r � UnmappedClassr& ZUnmappedPermission)�selfr/ r0 r1 r2 r r r �__init__= s � �zMapping.__init__�r" c C s$ | j |j kr| j|jk S | j |j k S �N)r- r. )r5 �otherr r r �__lt__T s zMapping.__lt__)F)r r r r r r' r! r* r( �boolr, �strr � MapStructr6 r: r r r r r+ 3 s �� r+ c @ s8 e Zd ZdZd.ee dd�dd�Zed�dd�Zd d�d d �Ze e d�d d �Z edd�d d�Z edd�dd�Z e e d�dd�Zee e d�dd�Zeee d�dd�Zedd�dd�Zeedd�d d �Zedd�d d �Zeedd�d d!�Zedd"�d#d$�Zeed%�d&d'�Zeeedd(�d)d*�Zeeedd+�d,d-�Z dS )/� PermissionMapz-Permission Map for information flow analysis.N)� permmapfiler" c C sL t �t�| _t� | _| |r(| �|� n t�d�}d� |j �}| �|� dS )�\ Parameter: permmapfile The path to the permission map to load. Zsetoolsz{0}/setools/perm_mapN) �loggingZ getLoggerr �logr �_permmap�load� pkg_resourcesZget_distributionr& �location)r5 r? Zdistro�pathr r r r6 _ s zPermissionMap.__init__r7 c C s | j S r8 )� _permmapfile�r5 r r r �__str__p s zPermissionMap.__str__c C s8 t �t �}| j|_t�| j�|_| j|_||t| �< |S r8 )r> �__new__rB �copy�deepcopyrC rH �id)r5 �memoZnewobjr r r � __deepcopy__s s zPermissionMap.__deepcopy__c c s( | � � D ]}| �|�D ] }|V qqd S r8 )�classes�perms)r5 �cls�mappingr r r �__iter__{ s zPermissionMap.__iter__c C sv | j �d�|�� t|d���}d}d}d}d}| j�� t|dd�D �]�\}}|�� } t| �dksF| d d dkrvqF|dkr�zt | d �}W n> t y� } z&t � d�||| d ��| �W Y d} ~ n d} ~ 0 0 |dk r�t � d �||| d ���d }qF|d k�r�t| �d k�s| d d k�r.t � d �||| ���t | d �} zt | d �} W n@ t �y� } z&t � d�||| d ��| �W Y d} ~ n d} ~ 0 0 | dk �r�t � d�||| d ���|d7 }||k�r�t � d�||| ���t� | j| < d} d }qF|d krFt | d �}t | d �}|tv�r,t � d�||| d ���zt | d �}W n@ t �y| } z&t � d�||| d ��| �W Y d} ~ n d} ~ 0 0 t| k�r�tk�s�n t � d�||| d tt���| j �d�| |||�� |dk�r�| j �d�| |�� t| j| |dd�}||_||_|d7 }| d7 } | | krFd }qFW d � n1 �s<0 Y || _| j �d�|�� | j �d�||�� dS )r@ z Opening permission map "{0}"r r r )�start�#z&{0}:{1}:Invalid number of classes: {2}Nz/{0}:{1}:Number of classes must be positive: {2}� � �classz&{0}:{1}:Invalid class declaration: {2}z*{0}:{1}:Invalid number of permissions: {2}z3{0}:{1}:Number of permissions must be positive: {2}z {0}:{1}:Extra class found: {2}z/{0}:{1}:Invalid information flow direction: {2}z&{0}:{1}:Invalid permission weight: {2}z.{0}:{1}:Permission weight must be {3}-{4}: {2}zRead {0}:{1} {2} {3}r z Permission {0}:{1} is unmapped.T�r2 z(Successfully opened permission map "{0}"z+Read {0} classes and {1} total permissions.)rB �infor& �openrC �clear� enumerate�split�lenr r% r ZPermissionMapParseErrorr< r r) r# r$ �debugr+ r( r! rH )r5 r? �mapfileZ total_permsZ class_countZ num_classes�stateZline_num�line�entry�ex� class_nameZ num_permsZ perm_count� perm_nameZflow_directionr! rT r r r rD � s� ��� �� �� ��� �� �� �� ��� �� � �& �zPermissionMap.loadc C s@ t |d��� }| j�d�|�� |�d�t| j��� | j�� D ]�\}}|�d�|t|��� |�� D ]�\}}tt |d �}tt |d �}t | kr�t ks�n J d�|||���|t v s�J d�|||���|d kr�| j�d �||�� |�d �|||�� qf|�d � q@| j�d �|�� W d � n1 �s20 Y dS )z� Save the permission map to the specified path. Existing files will be overwritten. Parameter: permmapfile The path to write the permission map. r z Writing permission map to "{0}"z{0} zclass {0} {1} r( r! z={0}:{1} weight is out of range ({2}). This is an SETools bug.z@{0}:{1} flow direction ({2}) is invalid. This is an SETools bug.r z1Warning: permission {0} in class {1} is unmapped.z{0:>20} {1:>9} {2:>9} � z*Successfully wrote permission map to "{0}"N)r] rB r\ r& r ra rC �itemsr r< r r# r$ r) Zwarning) r5 r? rc r0 rR ZpermnameZsettingsr( r! r r r �save� s2 �� �� � zPermissionMap.savec c s | j �� E dH dS )zw Generate class names in the permission map. Yield: class An object class name. N)rC �keysrI r r r rQ s zPermissionMap.classes)r- r" c c sd z(| j | �� D ]}t| j ||�V qW n6 ty^ } z t�d�|��|�W Y d}~n d}~0 0 dS )z� Generate permission mappings for the specified class. Parameter: class_ An object class name. Yield: Mapping A permission's complete map (weight, direction, enabled) r3 N)rC rm r+ �KeyErrorr r4 r& )r5 r- r. rg r r r rR s zPermissionMap.perms)r- r. r" c C s t | j||�S )z)Retrieve a specific permission's mapping.)r+ rC �r5 r- r. r r r rT / s zPermissionMap.mappingc C s | � |�D ] }d|_q dS )a Exclude all permissions in an object class for calculating rule weights. Parameter: class_ The object class to exclude. Exceptions: UnmappedClass The specified object class is not mapped. FN�rR r, ro r r r � exclude_class3 s zPermissionMap.exclude_class)r- r1 r" c C s dt | j||�_dS )a� Exclude a permission for calculating rule weights. Parameter: class_ The object class of the permission. permission The permission name to exclude. Exceptions: UnmappedClass The specified object class is not mapped. UnmappedPermission The specified permission is not mapped for the object class. FN�r+ rC r, �r5 r- r1 r r r �exclude_permission@ s z PermissionMap.exclude_permissionc C s | � |�D ] }d|_q dS )a Include all permissions in an object class for calculating rule weights. Parameter: class_ The object class to include. Exceptions: UnmappedClass The specified object class is not mapped. TNrp ro r r r � include_classN s zPermissionMap.include_classc C s dt | j||�_dS )a� Include a permission for calculating rule weights. Parameter: class_ The object class of the permission. permission The permission name to include. Exceptions: UnmappedClass The specified object class is not mapped. UnmappedPermission The specified permission is not mapped for the object class. TNrr rs r r r �include_permission\ s z PermissionMap.include_permission)�policyr" c C s� |� � D ]�}t|�}|| jvr>| j�d�||�� t� | j|< |j}tt j �� ||j jO }W d � n1 sp0 Y |D ]:}|| j| vr~| j�d�|||�� t | j||dd� q~qdS )zHCreate mappings for all classes and permissions in the specified policy.z"Adding unmapped class {0} from {1}Nz.Adding unmapped permission {0} in {1} from {2}Tr[ ) rQ r< rC rB rb r& r rR r r ZNoCommon�commonr+ )r5 rw r- rh rR ri r r r � map_policyk s * �zPermissionMap.map_policy)�ruler" c C s� d}d}t |j�}|jtjkr0t�d�|j���|jD ]l}t | j ||�}|j sPq6|j dkrht ||j�}q6|j dkr�t ||j�}q6|j dkr6t ||j�}t ||j�}q6t||�S )aT Get the type enforcement rule's information flow read and write weights. Parameter: rule A type enforcement rule. Return: Tuple(read_weight, write_weight) read_weight The type enforcement rule's read weight. write_weight The type enforcement rule's write weight. r z1{0} rules cannot be used for calculating a weightr r r )r< ZtclassZruletyper Zallowr Z RuleTypeErrorr& rR r+ rC r, r( �maxr! r )r5 rz Z write_weightZ read_weightrh ri rT r r r � rule_weight s& � zPermissionMap.rule_weight)r- r1 r( r" c C s |t | j||�_dS )a� Set the information flow direction of a permission. Parameter: class_ The object class of the permission. permission The permission name. direction The information flow direction the permission (r/w/b/n). Exceptions: UnmappedClass The specified object class is not mapped. UnmappedPermission The specified permission is not mapped for the object class. N)r+ rC r( )r5 r- r1 r( r r r � set_direction� s zPermissionMap.set_direction)r- r1 r! r" c C s |t | j||�_dS )a� Set the weight of a permission. Parameter: class_ The object class of the permission. permission The permission name. weight The weight of the permission (1-10). Exceptions: UnmappedClass The specified object class is not mapped. UnmappedPermission The specified permission is not mapped for the object class. N)r+ rC r! )r5 r- r1 r! r r r � set_weight� s zPermissionMap.set_weight)N) r r r r r r< r6 rJ rP r r+ rU rD rl rQ rR rT rq rt ru rv r ry r r r| r} r r~ r r r r r> [ s$ q% 'r> )"rA rL � collectionsr � contextlibr �typingr r r r r r rE � r Z descriptorsr Z policyrepr r r r) r# r$ r r r' r< r* r; r= r+ r> r r r r �<module> s" &(
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