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https://github.com/SELinuxProject/setools
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Add initial SID query.
Range portion of context match still needs to be defined.
This commit is contained in:
Chris PeBenito
parent
61e0a852e5
commit
d1050e4d9c
@ -39,6 +39,9 @@ import terulequery
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import rbacrulequery
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import mlsrulequery
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# In-policy Context Queries
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import initsidquery
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# Information Flow Analysis
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import infoflow
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import permmap
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167
libapol/contextquery.py
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167
libapol/contextquery.py
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@ -0,0 +1,167 @@
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# Copyright 2014, Tresys Technology, LLC
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#
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# This file is part of SETools.
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#
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# SETools is free software: you can redistribute it and/or modify
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# it under the terms of the GNU Lesser General Public License as
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# published by the Free Software Foundation, either version 2.1 of
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# the License, or (at your option) any later version.
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#
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# SETools is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU Lesser General Public License for more details.
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#
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# You should have received a copy of the GNU Lesser General Public
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# License along with SETools. If not, see
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# <http://www.gnu.org/licenses/>.
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#
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import re
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import query
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class ContextQuery(query.PolicyQuery):
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"""Abstract base class for SETools in-policy labeling/context queries."""
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@staticmethod
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def _match_context(context,
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user, user_regex, user_recomp,
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role, role_regex, role_recomp,
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type_, type_regex, type_recomp,
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range_):
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"""
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Match the context with optional regular expression.
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Parameters:
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context The object to match.
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user The user to match in the context.
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user_regex If true, regular expression matching
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will be used on the user.
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user_recomp The compiled user regular expression.
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role The role to match in the context.
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role_regex If true, regular expression matching
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will be used on the role.
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role_recomp The compiled role regular expression.
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type_ The type to match in the context.
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type_regex If true, regular expression matching
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will be used on the type.
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type_recomp The compiled type regular expression.
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range_ The range to match in the context.
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"""
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if user and not query.PolicyQuery._match_regex(
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context.user,
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user,
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user_regex,
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user_recomp):
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return False
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if role and not query.PolicyQuery._match_regex(
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context.role,
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role,
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role_regex,
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role_recomp):
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return False
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if type_ and not query.PolicyQuery._match_regex(
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context.type_,
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type_,
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type_regex,
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type_recomp):
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return False
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if range_:
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raise NotImplementedError(
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"Context range queries are not yet implemented.")
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return True
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def set_user(self, user, **opts):
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"""
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Set the criteria for matching the context's user.
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Parameter:
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user Name to match the context's user.
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regex If true, regular expression matching will be used.
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Exceptions:
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NameError Invalid keyword option.
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"""
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self.user = str(user)
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for k in opts.keys():
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if k == "regex":
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self.user_regex = opts[k]
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else:
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raise NameError("Invalid name option: {0}".format(k))
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if self.user_regex:
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self.user_cmp = re.compile(self.name)
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else:
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self.user_cmp = None
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def set_role(self, role, **opts):
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"""
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Set the criteria for matching the context's role.
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Parameter:
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role Name to match the context's role.
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regex If true, regular expression matching will be used.
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Exceptions:
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NameError Invalid keyword option.
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"""
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self.role = str(role)
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for k in opts.keys():
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if k == "regex":
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self.role_regex = opts[k]
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else:
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raise NameError("Invalid name option: {0}".format(k))
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if self.role_regex:
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self.role_cmp = re.compile(self.name)
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else:
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self.role_cmp = None
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def set_type(self, type_, **opts):
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"""
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Set the criteria for matching the context's type.
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Parameter:
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type_ Name to match the context's type.
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regex If true, regular expression matching will be used.
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Exceptions:
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NameError Invalid keyword option.
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"""
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self.type_ = str(type_)
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for k in opts.keys():
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if k == "regex":
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self.type_regex = opts[k]
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else:
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raise NameError("Invalid name option: {0}".format(k))
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if self.type_regex:
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self.type_cmp = re.compile(self.name)
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else:
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self.type_cmp = None
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def set_range(self, range_, **opts):
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"""
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Set the criteria for matching the context's range.
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Parameter:
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range_ Range to match the context's range.
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Exceptions:
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NameError Invalid keyword option.
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"""
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self.range_ = range_
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82
libapol/initsidquery.py
Normal file
82
libapol/initsidquery.py
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@ -0,0 +1,82 @@
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# Copyright 2014, Tresys Technology, LLC
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#
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# This file is part of SETools.
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#
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# SETools is free software: you can redistribute it and/or modify
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# it under the terms of the GNU Lesser General Public License as
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# published by the Free Software Foundation, either version 2.1 of
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# the License, or (at your option) any later version.
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#
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# SETools is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU Lesser General Public License for more details.
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#
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# You should have received a copy of the GNU Lesser General Public
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# License along with SETools. If not, see
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# <http://www.gnu.org/licenses/>.
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#
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import compquery
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import contextquery
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class InitialSIDQuery(compquery.ComponentQuery, contextquery.ContextQuery):
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"""Initial SID (context) query."""
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def __init__(self, policy,
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name="", name_regex=False,
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user="", user_regex=False,
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role="", role_regex=False,
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type_="", type_regex=False,
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range_=""):
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"""
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Parameters:
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policy The policy to query.
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user The criteria to match the context's user.
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user_regex If true, regular expression matching
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will be used on the user.
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role The criteria to match the context's role.
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role_regex If true, regular expression matching
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will be used on the role.
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type_ The criteria to match the context's type.
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type_regex If true, regular expression matching
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will be used on the type.
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range_ The criteria to match the context's range.
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"""
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self.policy = policy
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self.set_name(name, regex=name_regex)
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self.set_user(user, regex=user_regex)
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self.set_role(role, regex=role_regex)
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self.set_type(type_, regex=type_regex)
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self.set_range(range_)
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def results(self):
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"""Generator which yields all matching initial SIDs."""
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for i in self.policy.initialsids():
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if self.name and not self._match_regex(
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i,
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self.name,
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self.name_regex,
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self.name_cmp):
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continue
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if not self._match_context(
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i.context,
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self.user,
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self.user_regex,
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self.user_cmp,
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self.role,
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self.role_regex,
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self.role_cmp,
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self.type_,
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self.type_regex,
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self.type_cmp,
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self.range_):
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continue
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yield i
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12
seinfo
12
seinfo
@ -144,3 +144,15 @@ if args.classquery:
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print(c.statement())
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else:
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print(c)
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if args.initialsidquery:
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if isinstance(args.initialsidquery, str):
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q = libapol.initsidquery.InitialSIDQuery(p, args.initialsidquery)
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else:
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q = libapol.initsidquery.InitialSIDQuery(p)
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for i in sorted(q.results()):
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if args.expand:
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print(i.statement())
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else:
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print(i)
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