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
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
|
#!/usr/bin/env python3
#
# Copyright (C) 2020 VyOS maintainers and contributors
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2 or later as
# published by the Free Software Foundation.
#
# 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 os
from shutil import rmtree
from sys import exit
from vyos.config import Config
from vyos.configdict import dict_merge
from vyos.template import render
from vyos.util import call
from vyos.util import dict_search
from vyos.util import write_file
from vyos.validate import is_addr_assigned
from vyos.xml import defaults
from vyos import ConfigError
from vyos import airbag
airbag.enable()
squid_config_file = '/etc/squid/squid.conf'
squidguard_config_file = '/etc/squidguard/squidGuard.conf'
squidguard_db_dir = '/opt/vyatta/etc/config/url-filtering/squidguard/db'
user_group = 'proxy'
def generate_sg_localdb(category, list_type, role, proxy):
cat_ = category.replace('-', '_')
if isinstance(dict_search(f'url_filtering.squidguard.{cat_}', proxy),
list):
# local block databases must be generated "on-the-fly"
tmp = {
'squidguard_db_dir' : squidguard_db_dir,
'category' : f'{category}-default',
'list_type' : list_type,
'rule' : role
}
sg_tmp_file = '/tmp/sg.conf'
db_file = f'{category}-default/{list_type}'
domains = '\n'.join(dict_search(f'url_filtering.squidguard.{cat_}', proxy))
# local file
write_file(f'{squidguard_db_dir}/{category}-default/local', '',
user=user_group, group=user_group)
# database input file
write_file(f'{squidguard_db_dir}/{db_file}', domains,
user=user_group, group=user_group)
# temporary config file, deleted after generation
render(sg_tmp_file, 'squid/sg_acl.conf.tmpl', tmp,
user=user_group, group=user_group)
call(f'su - {user_group} -c "squidGuard -d -c {sg_tmp_file} -C {db_file}"')
if os.path.exists(sg_tmp_file):
os.unlink(sg_tmp_file)
else:
# if category is not part of our configuration, clean out the
# squidguard lists
tmp = f'{squidguard_db_dir}/{category}-default'
if os.path.exists(tmp):
rmtree(f'{squidguard_db_dir}/{category}-default')
def get_config(config=None):
if config:
conf = config
else:
conf = Config()
base = ['service', 'webproxy']
if not conf.exists(base):
return None
proxy = conf.get_config_dict(base, key_mangling=('-', '_'), get_first_key=True)
# We have gathered the dict representation of the CLI, but there are default
# options which we need to update into the dictionary retrived.
default_values = defaults(base)
# if no authentication method is supplied, no need to add defaults
if not dict_search('authentication.method', proxy):
default_values.pop('authentication')
# if no url_filteringurl-filtering method is supplied, no need to add defaults
if 'url_filtering' not in proxy:
default_values.pop('url_filtering')
else:
# store path to squidGuard config, used when generating Squid config
proxy['squidguard_conf'] = squidguard_config_file
proxy['squidguard_db_dir'] = squidguard_db_dir
# XXX: T2665: blend in proper cache-peer default values later
default_values.pop('cache_peer')
proxy = dict_merge(default_values, proxy)
# XXX: T2665: blend in proper cache-peer default values
if 'cache_peer' in proxy:
default_values = defaults(base + ['cache-peer'])
for peer in proxy['cache_peer']:
proxy['cache_peer'][peer] = dict_merge(default_values,
proxy['cache_peer'][peer])
return proxy
def verify(proxy):
if not proxy:
return None
if 'listen_address' not in proxy:
raise ConfigError('listen-address needs to be configured!')
ldap_auth = dict_search('authentication.method', proxy) == 'ldap'
for address, config in proxy['listen_address'].items():
if not is_addr_assigned(address):
raise ConfigError(
f'listen-address "{address}" not assigned on any interface!')
if ldap_auth and 'disable_transparent' not in config:
raise ConfigError('Authentication can not be configured when ' \
'proxy is in transparent mode')
if 'outgoing_address' in proxy:
address = proxy['outgoing_address']
if not is_addr_assigned(address):
raise ConfigError(
f'outgoing-address "{address}" not assigned on any interface!')
if 'authentication' in proxy:
if 'method' not in proxy['authentication']:
raise ConfigError('proxy authentication method required!')
if ldap_auth:
ldap_config = proxy['authentication']['ldap']
if 'server' not in ldap_config:
raise ConfigError(
'LDAP authentication enabled, but no server set')
if 'password' in ldap_config and 'bind_dn' not in ldap_config:
raise ConfigError(
'LDAP password can not be set when base-dn is undefined!')
if 'bind_dn' in ldap_config and 'password' not in ldap_config:
raise ConfigError(
'LDAP bind DN can not be set without password!')
if 'base_dn' not in ldap_config:
raise ConfigError('LDAP base-dn must be set!')
if 'cache_peer' in proxy:
for peer, config in proxy['cache_peer'].items():
if 'address' not in config:
raise ConfigError(f'Cache-peer "{peer}" address must be set!')
def generate(proxy):
if not proxy:
return None
render(squid_config_file, 'squid/squid.conf.tmpl', proxy)
render(squidguard_config_file, 'squid/squidGuard.conf.tmpl', proxy)
cat_dict = {
'local-block' : 'domains',
'local-block-keyword' : 'expressions',
'local-block-url' : 'urls',
'local-ok' : 'domains',
'local-ok-url' : 'urls'
}
for category, list_type in cat_dict.items():
generate_sg_localdb(category, list_type, 'default', proxy)
return None
def apply(proxy):
if not proxy:
# proxy is removed in the commit
call('systemctl stop squid.service')
if os.path.exists(squid_config_file):
os.unlink(squid_config_file)
if os.path.exists(squidguard_config_file):
os.unlink(squidguard_config_file)
return None
call('systemctl restart squid.service')
return None
if __name__ == '__main__':
try:
c = get_config()
verify(c)
generate(c)
apply(c)
except ConfigError as e:
print(e)
exit(1)
|
