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File Content: `interface.py`

# Copyright (C) 2012 Red Hat
# see file 'COPYING' for use and warranty information
#
# policygentool is a tool for the initial generation of SELinux policy
#
#    This program is free software; you can redistribute it and/or
#    modify it under the terms of the GNU General Public License as
#    published by the Free Software Foundation; either version 2 of
#    the License, or (at your option) any later version.
#
#    This program is distributed in the hope that it will be useful,
#    but WITHOUT ANY WARRANTY; without even the implied warranty of
#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#    GNU General Public License for more details.
#
#    You should have received a copy of the GNU General Public License
#    along with this program; if not, write to the Free Software
#    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
#                                        02111-1307  USA
#
#
import re
import sys
import sepolicy
ADMIN_TRANSITION_INTERFACE = "_admin$"
USER_TRANSITION_INTERFACE = "_role$"

__all__ = ['get_all_interfaces', 'get_interfaces_from_xml', 'get_admin', 'get_user', 'get_interface_dict', 'get_interface_format_text', 'get_interface_compile_format_text', 'get_xml_file', 'interface_compile_test']

##
## I18N
##
PROGNAME = "selinux-python"
try:
    import gettext
    kwargs = {}
    if sys.version_info < (3,):
        kwargs['unicode'] = True
    t = gettext.translation(PROGNAME,
                    localedir="/usr/share/locale",
                    **kwargs,
                    fallback=True)
    _ = t.gettext
except:
    try:
        import builtins
        builtins.__dict__['_'] = str
    except ImportError:
        import __builtin__
        __builtin__.__dict__['_'] = unicode


def get_interfaces_from_xml(path):
    """ Get all interfaces from given xml file"""
    interfaces_list = []
    idict = get_interface_dict(path)
    for k in idict.keys():
        interfaces_list.append(k)
    return interfaces_list


def get_all_interfaces(path=""):
    from sepolicy import get_methods
    all_interfaces = []
    if not path:
        all_interfaces = get_methods()
    else:
        xml_path = get_xml_file(path)
        all_interfaces = get_interfaces_from_xml(xml_path)

    return all_interfaces


def get_admin(path=""):
    """ Get all domains with an admin interface from installed policy."""
    """ If xml_path is specified, func returns an admin interface from specified xml file"""
    admin_list = []
    if path:
        try:
            xml_path = get_xml_file(path)
            idict = get_interface_dict(xml_path)
            for k in idict.keys():
                if k.endswith("_admin"):
                    admin_list.append(k)
        except IOError as e:
            sys.stderr.write("%s: %s\n" % (e.__class__.__name__, str(e)))
            sys.exit(1)
    else:
        for i in sepolicy.get_methods():
            if i.endswith("_admin"):
                admin_list.append(i.split("_admin")[0])

    return admin_list


def get_user(path=""):
    """ Get all domains with SELinux user role interface"""
    """ If xml_path is specified, func returns an user role interface from specified xml file"""
    trans_list = []
    if path:
        try:
            xml_path = get_xml_file(path)
            idict = get_interface_dict(xml_path)
            for k in idict.keys():
                if k.endswith("_role"):
                    if (("%s_exec_t" % k[:-5]) in sepolicy.get_all_types()):
                        trans_list.append(k)
        except IOError as e:
            sys.stderr.write("%s: %s\n" % (e.__class__.__name__, str(e)))
            sys.exit(1)
    else:
        for i in sepolicy.get_methods():
            m = re.findall("(.*)%s" % USER_TRANSITION_INTERFACE, i)
            if len(m) > 0:
                if "%s_exec_t" % m[0] in sepolicy.get_all_types():
                    trans_list.append(m[0])

    return trans_list

interface_dict = None


def get_interface_dict(path="/usr/share/selinux/devel/policy.xml"):
    global interface_dict
    import os
    import xml.etree.ElementTree
    if interface_dict:
        return interface_dict

    interface_dict = {}
    param_list = []

    xml_path = """<?xml version="1.0" encoding="ISO-8859-1" standalone="no"?>
<policy>
<layer name="admin">
"""
    xml_path += path
    xml_path += """
</layer>
</policy>
"""

    try:
        if os.path.isfile(path):
            tree = xml.etree.ElementTree.parse(path)
        else:
            tree = xml.etree.ElementTree.fromstring(xml_path)
        for l in tree.findall("layer"):
            for m in l.findall("module"):
                for i in m.iter('interface'):
                    for e in i.findall("param"):
                        param_list.append(e.get('name'))
                    interface_dict[(i.get("name"))] = [param_list, (i.find('summary').text), "interface"]
                    param_list = []
                for i in m.iter('template'):
                    for e in i.findall("param"):
                        param_list.append(e.get('name'))
                    interface_dict[(i.get("name"))] = [param_list, (i.find('summary').text), "template"]
                    param_list = []
    except IOError:
        pass
    return interface_dict


def get_interface_format_text(interface, path="/usr/share/selinux/devel/policy.xml"):
    idict = get_interface_dict(path)
    interface_text = "%s(%s) %s" % (interface, ", ".join(idict[interface][0]), " ".join(idict[interface][1].split("\n")))

    return interface_text


def get_interface_compile_format_text(interfaces_dict, interface):
    from .templates import test_module
    param_tmp = []
    for i in interfaces_dict[interface][0]:
        param_tmp.append(test_module.dict_values[i])
        interface_text = "%s(%s)\n" % (interface, ", ".join(param_tmp))

    return interface_text


def generate_compile_te(interface, idict, name="compiletest"):
    from .templates import test_module
    te = ""
    te += re.sub("TEMPLATETYPE", name, test_module.te_test_module)
    te += get_interface_compile_format_text(idict, interface)

    return te


def get_xml_file(if_file):
    """ Returns xml format of interfaces for given .if policy file"""
    import os
    try:
        from commands import getstatusoutput
    except ImportError:
        from subprocess import getstatusoutput
    basedir = os.path.dirname(if_file) + "/"
    filename = os.path.basename(if_file).split(".")[0]
    rc, output = getstatusoutput("/usr/bin/python3 /usr/share/selinux/devel/include/support/segenxml.py -w -m %s" % (basedir + filename))
    if rc != 0:
        sys.stderr.write("\n Could not process selected interface file.\n")
        sys.stderr.write("\n%s" % output)
        sys.exit(1)
    else:
        return output


def interface_compile_test(interface, path="/usr/share/selinux/devel/policy.xml"):
    exclude_interfaces = ["userdom", "kernel", "corenet", "files", "dev"]
    exclude_interface_type = ["template"]

    try:
        from commands import getstatusoutput
    except ImportError:
        from subprocess import getstatusoutput
    import os
    policy_files = {'pp': "compiletest.pp", 'te': "compiletest.te", 'fc': "compiletest.fc", 'if': "compiletest.if"}
    idict = get_interface_dict(path)

    if not (interface.split("_")[0] in exclude_interfaces or idict[interface][2] in exclude_interface_type):
        print(_("Compiling %s interface") % interface)
        try:
            fd = open(policy_files['te'], "w")
            fd.write(generate_compile_te(interface, idict))
            fd.close()
            rc, output = getstatusoutput("make -f /usr/share/selinux/devel/Makefile %s" % policy_files['pp'])
            if rc != 0:
                sys.stderr.write(output)
                sys.stderr.write(_("\nCompile test for %s failed.\n") % interface)

        except EnvironmentError as e:
            sys.stderr.write(_("\nCompile test for %s has not run. %s\n") % (interface, e))
        for v in policy_files.values():
            if os.path.exists(v):
                os.remove(v)

    else:
        sys.stderr.write(_("\nCompiling of %s interface is not supported.") % interface)
Name	Size	Permission
__pycache__	---	0755
help	---	0755
templates	---	0755
__init__.py	37828 bytes	0644
booleans.py	1576 bytes	0644
communicate.py	1725 bytes	0644
generate.py	51588 bytes	0644
interface.py	8197 bytes	0644
manpage.py	40875 bytes	0644
network.py	2810 bytes	0644
sedbus.py	1519 bytes	0644
transition.py	3221 bytes	0644
File Content: interface.py

File Content: `interface.py`
