forked from msvsphere/leapp-repository
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
84 lines
2.7 KiB
84 lines
2.7 KiB
import re
|
|
|
|
|
|
def _build_regex(pattern):
|
|
regex = '^'
|
|
part_beginning = 0
|
|
while part_beginning < len(pattern):
|
|
ix1 = pattern.find('*', part_beginning)
|
|
ix2 = pattern.find('?', part_beginning)
|
|
ix1 = len(pattern) if ix1 < 0 else ix1
|
|
ix2 = len(pattern) if ix2 < 0 else ix2
|
|
part_end = min(ix1, ix2)
|
|
|
|
regex += re.escape(pattern[part_beginning:part_end])
|
|
|
|
if part_end < len(pattern):
|
|
if pattern[part_end] == '*':
|
|
regex += '.*'
|
|
else:
|
|
regex += '.'
|
|
|
|
part_beginning = part_end + 1
|
|
|
|
regex += '$'
|
|
return regex
|
|
|
|
|
|
def _pattern_matches(pattern, string):
|
|
if pattern.lower() == 'all':
|
|
return True
|
|
regex = _build_regex(pattern)
|
|
return re.match(regex, string, re.IGNORECASE) is not None
|
|
|
|
|
|
def _daemon_list_matches_daemon(daemon_list, daemon, recursion_depth):
|
|
try:
|
|
cur_list_end = daemon_list.index('except')
|
|
except ValueError:
|
|
cur_list_end = len(daemon_list)
|
|
cur_list = daemon_list[:cur_list_end]
|
|
matches_cur_list = False
|
|
for item in cur_list:
|
|
try:
|
|
ix = item.index('@')
|
|
# For simplicity, we ignore the host part. So we must make sure
|
|
# that a daemon list containing a host-based pattern will always match
|
|
# the daemon part of that host-based pattern (e.g. 'all except vsftpd@localhost
|
|
# matches 'vsftpd'). See test_config_applies_to_daemon_with_host_except().
|
|
if recursion_depth % 2 == 1:
|
|
continue
|
|
pattern = item[:ix]
|
|
except ValueError:
|
|
pattern = item
|
|
if _pattern_matches(pattern, daemon):
|
|
matches_cur_list = True
|
|
break
|
|
|
|
next_list = daemon_list[cur_list_end + 1:]
|
|
if not next_list:
|
|
matches_next_list = False
|
|
else:
|
|
matches_next_list = _daemon_list_matches_daemon(next_list, daemon, recursion_depth + 1)
|
|
|
|
return matches_cur_list and not matches_next_list
|
|
|
|
|
|
def config_applies_to_daemon(facts, daemon):
|
|
"""
|
|
Returns True if the specified tcp_wrappers configuration applies to the specified daemon.
|
|
Otherwise returns False.
|
|
|
|
This information is intended to be used in the Checks phase to check whether there is
|
|
any tcp_wrappers configuration that the user needs to migrate manually and whether we
|
|
should inhibit the upgrade, so that the upgraded system is not insecure.
|
|
|
|
:param facts: A TcpWrappersFacts representation of the tcp_wrappers configuration
|
|
:param daemon: The daemon name
|
|
"""
|
|
for daemon_list in facts.daemon_lists:
|
|
value = [item.lower() for item in daemon_list.value]
|
|
if _daemon_list_matches_daemon(value, daemon, 0):
|
|
return True
|
|
return False
|