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This module provides knowledge object classes and permissions. It should
be used to keep this knowledge from leaking into the more generic parts of
the policy generation.
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capabilityZunix_stream_socket� � � )�n�r�w�br r r r c @ s e Zd ZdZdd� Zdd� ZdS )�PermMapa A mapping between a permission and its information flow properties.
PermMap represents the information flow properties of a single permission
including the direction (read, write, etc.) and an abstract representation
of the bandwidth of the flow (weight).
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� Z dS )� PermMappingsz�The information flow properties of a set of object classes and permissions.
PermMappings maps one or more classes and permissions to their PermMap objects
describing their information flow charecteristics.
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W dS ) zsRead the permission mappings from a file. This reads the format used
by Apol in the setools suite.
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zPermMappings.from_filec C s | j | | S )z�Get the permission map for the object permission.
Returns:
PermMap representing the permission
Raises:
KeyError if the object or permission is not defined
)r )r �objr r r r �get� s zPermMappings.getc C s8 y| j | | }W n tk
r2 t|| j| j�S X |S )a Get the permission map for the object permission or a default.
getdefault is the same as get except that a default PermMap is
returned if the object class or permission is not defined. The
default is FLOW_BOTH with a weight of 5.
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