1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
|
# GPO Parser for registry extension
#
# Copyright (C) Andrew Bartlett <abartlet@samba.org> 2018
# Written by Garming Sam <garming@catalyst.net.nz>
#
# 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 3 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, see <http://www.gnu.org/licenses/>.
#
import base64
from xml.etree.ElementTree import Element, SubElement
from samba.dcerpc import preg
from samba.dcerpc import misc
from samba.ndr import ndr_pack, ndr_unpack
from samba.gp_parse import GPParser
# [MS-GPREG]
# [MS-GPFAS] Firewall and Advanced Security
# [MS-GPEF] Encrypting File System
# [MS-GPNRPT] Name Resolution Table
class GPPolParser(GPParser):
pol_file = None
reg_type = {
misc.REG_NONE: "REG_NONE",
misc.REG_SZ: "REG_SZ",
misc.REG_DWORD: "REG_DWORD",
misc.REG_DWORD_BIG_ENDIAN: "REG_DWORD_BIG_ENDIAN",
misc.REG_QWORD: "REG_QWORD",
misc.REG_EXPAND_SZ: "REG_EXPAND_SZ",
misc.REG_MULTI_SZ: "REG_MULTI_SZ",
misc.REG_BINARY: "REG_BINARY"
}
def map_reg_type(self, val):
ret = self.reg_type.get(val)
if ret is None:
return "REG_UNKNOWN"
return ret
def parse(self, contents):
self.pol_file = ndr_unpack(preg.file, contents)
def load_xml(self, root):
self.pol_file = preg.file()
self.pol_file.header.signature = root.attrib['signature']
self.pol_file.header.version = int(root.attrib['version'])
self.pol_file.num_entries = int(root.attrib['num_entries'])
entries = []
for e in root.findall('Entry'):
entry = preg.entry()
entry_type = int(e.attrib['type'])
entry.type = entry_type
entry.keyname = e.find('Key').text
value_name = e.find('ValueName').text
if value_name is None:
value_name = ''
entry.valuename = value_name
# entry.size = int(e.attrib['size'])
if misc.REG_MULTI_SZ == entry_type:
values = [x.text for x in e.findall('Value')]
if values == [None]:
data = u'\x00'
else:
data = u'\x00'.join(values) + u'\x00\x00'
entry.data = data.encode('utf-16le')
elif (misc.REG_NONE == entry_type):
pass
elif (misc.REG_SZ == entry_type or
misc.REG_EXPAND_SZ == entry_type):
string_val = e.find('Value').text
if string_val is None:
string_val = ''
entry.data = string_val
elif (misc.REG_DWORD == entry_type or
misc.REG_DWORD_BIG_ENDIAN == entry_type or
misc.REG_QWORD == entry_type):
entry.data = int(e.find('Value').text)
else: # REG UNKNOWN or REG_BINARY
entry.data = base64.b64decode(e.find('Value').text)
entries.append(entry)
self.pol_file.entries = entries
# print self.pol_file.__ndr_print__()
def write_xml(self, filename):
with open(filename, 'wb') as f:
root = Element('PolFile')
root.attrib['num_entries'] = str(self.pol_file.num_entries)
root.attrib['signature'] = self.pol_file.header.signature
root.attrib['version'] = str(self.pol_file.header.version)
for entry in self.pol_file.entries:
child = SubElement(root, 'Entry')
# child.attrib['size'] = str(entry.size)
child.attrib['type'] = str(entry.type)
child.attrib['type_name'] = self.map_reg_type(entry.type)
key = SubElement(child, 'Key')
key.text = entry.keyname
valuename = SubElement(child, 'ValueName')
valuename.text = entry.valuename
if misc.REG_MULTI_SZ == entry.type:
multi = entry.data.decode('utf-16').rstrip(u'\x00').split(u'\x00')
# print repr(multi)
for m in multi:
value = SubElement(child, 'Value')
value.text = m
# print tostring(value)
elif (misc.REG_NONE == entry.type or
misc.REG_SZ == entry.type or
misc.REG_DWORD == entry.type or
misc.REG_DWORD_BIG_ENDIAN == entry.type or
misc.REG_QWORD == entry.type or
misc.REG_EXPAND_SZ == entry.type):
value = SubElement(child, 'Value')
value.text = str(entry.data)
# print tostring(value)
else: # REG UNKNOWN or REG_BINARY
value = SubElement(child, 'Value')
value.text = base64.b64encode(entry.data).decode('utf8')
# print tostring(value)
# print tostring(root)
self.write_pretty_xml(root, f)
# contents = codecs.open(filename, encoding='utf-8').read()
# self.load_xml(fromstring(contents))
def write_binary(self, filename):
with open(filename, 'wb') as f:
binary_data = ndr_pack(self.pol_file)
f.write(binary_data)
|
