/usr/lib/python3/dist-packages/ufw/applications.py is in ufw 0.34~rc-0ubuntu2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 | '''applications.py: common classes for ufw'''
#
# Copyright 2008-2012 Canonical Ltd.
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 3,
# 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
import re
import stat
import ufw.util
from ufw.util import debug, warn
from ufw.common import UFWError
import sys
if sys.version_info[0] < 3:
import ConfigParser
else:
import configparser
def get_profiles(profiles_dir):
'''Get profiles found in profiles database. Returns dictionary with
profile name as key and tuples for fields
'''
if not os.path.isdir(profiles_dir):
err_msg = _("Profiles directory does not exist")
raise UFWError(err_msg)
max_size = 10 * 1024 * 1024 # 10MB
profiles = {}
files = os.listdir(profiles_dir)
files.sort()
total_size = 0
pat = re.compile(r'^\.')
for f in files:
abs_path = profiles_dir + "/" + f
if not os.path.isfile(abs_path):
continue
if pat.search(f):
debug("Skipping '%s': hidden file" % (f))
continue
if f.endswith('.dpkg-new') or f.endswith('.dpkg-old') or \
f.endswith('.dpkg-dist') or f.endswith('.rpmnew') or \
f.endswith('.rpmsave') or f.endswith('~'):
debug("Skipping '%s'" % (f))
continue
# Try to gracefully handle huge files for the user (no security
# benefit, just usability)
size = 0
try:
size = os.stat(abs_path)[stat.ST_SIZE]
except Exception:
warn_msg = _("Skipping '%s': couldn't stat") % (f)
warn(warn_msg)
continue
if size > max_size:
warn_msg = _("Skipping '%s': too big") % (f)
warn(warn_msg)
continue
if total_size + size > max_size:
warn_msg = _("Skipping '%s': too many files read already") % (f)
warn(warn_msg)
continue
total_size += size
if sys.version_info[0] < 3:
cdict = ConfigParser.RawConfigParser()
else:
cdict = configparser.RawConfigParser()
try:
cdict.read(abs_path)
except Exception:
warn_msg = _("Skipping '%s': couldn't process") % (f)
warn(warn_msg)
continue
# If multiple occurences of profile name, use the last one
for p in cdict.sections():
if len(p) > 64:
warn_msg = _("Skipping '%s': name too long") % (p)
warn(warn_msg)
continue
if not valid_profile_name(p):
warn_msg = _("Skipping '%s': invalid name") % (p)
warn(warn_msg)
continue
try:
ufw.util.get_services_proto(p)
warn_msg = _("Skipping '%s': also in /etc/services") % (p)
warn(warn_msg)
continue
except Exception:
pass
skip = False
for key, value in cdict.items(p):
if len(key) > 64:
warn_msg = _("Skipping '%s': field too long") % (p)
warn(warn_msg)
skip = True
break
if len(value) > 1024:
warn_msg = _("Skipping '%(value)s': value too long for " \
"'%(field)s'") % \
({'value': p, 'field': key})
warn(warn_msg)
skip = True
break
if skip:
continue
if p in profiles:
warn_msg = _("Duplicate profile '%s', using last found") % (p)
warn(warn_msg)
pdict = {}
for key, value in cdict.items(p):
#debug("add '%s' = '%s' to '%s'" % (key, value, p))
pdict[key] = value
profiles[p] = pdict
return profiles
def valid_profile_name(name):
'''Only accept a limited set of characters for name'''
# Reserved profile name
if name == "all":
return False
# Don't allow integers (ports)
try:
int(name)
return False
except:
pass
# Require first character be alpha, so we can avoid collisions with port
# numbers.
if re.match(r'^[a-zA-Z0-9][a-zA-Z0-9 _\-\.+]*$', name):
return True
return False
def verify_profile(name, profile):
'''Make sure profile has everything needed'''
app_fields = ['title', 'description', 'ports']
for f in app_fields:
if f not in profile:
err_msg = _("Profile '%(fn)s' missing required field '%(f)s'") % \
({'fn': name, 'f': f})
raise UFWError(err_msg)
elif not profile[f]:
err_msg = _("Profile '%(fn)s' has empty required field '%(f)s'") \
% ({'fn': name, 'f': f})
raise UFWError(err_msg)
ports = profile['ports'].split('|')
if len(ports) < 1:
err_msg = _("No ports found in profile '%s'") % (name)
return False
try:
for p in ports:
(port, proto) = ufw.util.parse_port_proto(p)
# quick check if error in profile
#if not proto:
# proto = "any"
rule = ufw.common.UFWRule("ACCEPT", proto, port)
debug(rule)
except Exception as e:
debug(e)
err_msg = _("Invalid ports in profile '%s'") % (name)
raise UFWError(err_msg)
return True
def get_title(profile):
'''Retrieve the title from the profile'''
s = ""
field = 'title'
if field in profile and profile[field]:
s = profile[field]
return s
def get_description(profile):
'''Retrieve the description from the profile'''
s = ""
field = 'description'
if field in profile and profile[field]:
s = profile[field]
return s
def get_ports(profile):
'''Retrieve a list of ports from a profile'''
ports = []
field = 'ports'
if field in profile and profile[field]:
ports = profile[field].split('|')
return ports
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