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classes and algorithms for the generation of SELinux policy.
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dd� Zdd� Zdd � Zd d � ZdS )#�PolicyGeneratora� Generate a reference policy module from access vectors.
PolicyGenerator generates a new reference policy module
or updates an existing module based on requested access
in the form of access vectors.
It generates allow rules and optionally module require
statements, reference policy interfaces, and extended
permission access vector rules. By default only allow rules
are generated. The methods .set_gen_refpol, .set_gen_requires
and .set_gen_xperms turns on interface generation,
requires generation, and xperms rules genration respectively.
PolicyGenerator can also optionally add comments explaining
why a particular access was allowed based on the audit
messages that generated the access. The access vectors
passed in must have the .audit_msgs field set correctly
and .explain set to SHORT|LONG_EXPLANATION to enable this
feature.
The module created by PolicyGenerator can be passed to
output.ModuleWriter to output a text representation.
Nc C s> d| _ t| _d| _|r || _n
tj� | _d| _d| _d| _ dS )z�Initialize a PolicyGenerator with an optional
existing module.
If the module paramater is not None then access
will be added to the passed in module. Otherwise
a new reference policy module will be created.
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�ifgen�NO_EXPLANATION�explain� gen_requires�moduler ZModule� dontaudit�xperms�domains)�selfr � r � /usr/lib/python3.6/policygen.py�__init__E s
zPolicyGenerator.__init__c C s* |rt ||�| _d| _nd| _| j� dS )a? Set whether reference policy interfaces are generated.
To turn on interface generation pass in an interface set
to use for interface generation. To turn off interface
generation pass in None.
If interface generation is enabled requires generation
will also be enabled.
TN)�InterfaceGeneratorr r �"_PolicyGenerator__set_module_style)r Zif_set� perm_mapsr r r �set_gen_refpolY s
z PolicyGenerator.set_gen_refpolTc C s
|| _ dS )a& Set whether module requires are generated.
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disabled interface generation will also be disabled and
can only be re-enabled via .set_gen_refpol.
N)r )r Zstatusr r r �set_gen_requiresk s z PolicyGenerator.set_gen_requiresc C s
|| _ dS )z)Set whether access is explained.
N)r )r r r r r �set_gen_explainu s z PolicyGenerator.set_gen_explainc C s
|| _ d S )N)r )r r r r r �set_gen_dontauditz s z!PolicyGenerator.set_gen_dontauditc C s
|| _ dS )zSSet whether extended permission access vector rules
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N)r )r r r r r �set_gen_xperms} s z PolicyGenerator.set_gen_xpermsc C s. | j r d}nd}x| jj� D ]
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z"PolicyGenerator.__set_module_style�1.0c C s\ d}x| j j� D ]}|}qW |s8tj� }| j jjd|� ||_||_| jrRd|_nd|_dS )z?Set the name of the module and optionally the version.
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#!!!! This avc is allowed in the current policyzN
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#!!!! This avc can be allowed using the boolean '%s'r z�
#!!!! This avc is a constraint violation. You would need to modify the attributes of either the source or target types to allow this access.z
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# Nz?
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f � |� �S )a� Explain why a policy statement was generated.
Return a string containing a text explanation of
why a policy statement was generated. The string is
commented and wrapped and can be directly inserted
into a policy.
Params:
av - access vector representing the access. Should
have .audit_msgs set appropriately.
verbosity - the amount of explanation provided. Should
be set to NO_EXPLANATION, SHORT_EXPLANATION, or
LONG_EXPLANATION.
Returns:
list of strings - strings explaining the access or an empty
string if verbosity=NO_EXPLANATION or there is not sufficient
information to provide an explanation.
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