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https://salsa.debian.org/freeipa-team/freeipa.git
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40e1eb695d
When provided empty value in nolog parameter nolog_replace added 'XXXXXXXX' three (once for plain value, once for http quoted value and last time for shell quoted value) times before every character (including terminating '\0') in the string. https://pagure.io/freeipa/issue/6738 Reviewed-By: Pavel Vomacka <pvomacka@redhat.com>
1539 lines
52 KiB
Python
1539 lines
52 KiB
Python
# Authors: Simo Sorce <ssorce@redhat.com>
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#
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# Copyright (C) 2007-2016 Red Hat, Inc.
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# see file 'COPYING' for use and warranty information
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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#
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from __future__ import print_function
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import string
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import tempfile
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import subprocess
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import random
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import os
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import sys
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import copy
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import stat
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import shutil
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import socket
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import re
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import datetime
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import netaddr
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import netifaces
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import time
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import gssapi
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import pwd
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import grp
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from contextlib import contextmanager
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import locale
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import collections
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from subprocess import CalledProcessError
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from dns import resolver, reversename
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from dns.exception import DNSException
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import six
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from six.moves import input
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from six.moves import urllib
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from ipapython.ipa_log_manager import root_logger
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from ipapython import config
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from ipaplatform.paths import paths
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from ipapython.dn import DN
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SHARE_DIR = paths.USR_SHARE_IPA_DIR
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PLUGINS_SHARE_DIR = paths.IPA_PLUGINS
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GEN_PWD_LEN = 22
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GEN_TMP_PWD_LEN = 12 # only for OTP password that is manually retyped by user
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# Having this in krb_utils would cause circular import
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KRB5_KDC_UNREACH = 2529639068 # Cannot contact any KDC for requested realm
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KRB5KDC_ERR_SVC_UNAVAILABLE = 2529638941 # A service is not available that is
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# required to process the request
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def get_domain_name():
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try:
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config.init_config()
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domain_name = config.config.get_domain()
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except Exception:
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return None
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return domain_name
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class UnsafeIPAddress(netaddr.IPAddress):
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"""Any valid IP address with or without netmask."""
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# Use inet_pton() rather than inet_aton() for IP address parsing. We
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# will use the same function in IPv4/IPv6 conversions + be stricter
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# and don't allow IP addresses such as '1.1.1' in the same time
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netaddr_ip_flags = netaddr.INET_PTON
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def __init__(self, addr):
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if isinstance(addr, UnsafeIPAddress):
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self._net = addr._net
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super(UnsafeIPAddress, self).__init__(addr,
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flags=self.netaddr_ip_flags)
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return
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elif isinstance(addr, netaddr.IPAddress):
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self._net = None # no information about netmask
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super(UnsafeIPAddress, self).__init__(addr,
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flags=self.netaddr_ip_flags)
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return
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elif isinstance(addr, netaddr.IPNetwork):
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self._net = addr
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super(UnsafeIPAddress, self).__init__(self._net.ip,
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flags=self.netaddr_ip_flags)
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return
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# option of last resort: parse it as string
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self._net = None
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addr = str(addr)
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try:
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try:
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addr = netaddr.IPAddress(addr, flags=self.netaddr_ip_flags)
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except netaddr.AddrFormatError:
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# netaddr.IPAddress doesn't handle zone indices in textual
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# IPv6 addresses. Try removing zone index and parse the
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# address again.
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addr, sep, foo = addr.partition('%')
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if sep != '%':
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raise
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addr = netaddr.IPAddress(addr, flags=self.netaddr_ip_flags)
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if addr.version != 6:
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raise
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except ValueError:
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self._net = netaddr.IPNetwork(addr, flags=self.netaddr_ip_flags)
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addr = self._net.ip
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super(UnsafeIPAddress, self).__init__(addr,
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flags=self.netaddr_ip_flags)
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def __getstate__(self):
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state = {
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'_net': self._net,
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'super_state': super(UnsafeIPAddress, self).__getstate__(),
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}
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return state
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def __setstate__(self, state):
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super(UnsafeIPAddress, self).__setstate__(state['super_state'])
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self._net = state['_net']
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class CheckedIPAddress(UnsafeIPAddress):
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"""IPv4 or IPv6 address with additional constraints.
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Reserved or link-local addresses are never accepted.
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"""
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def __init__(self, addr, match_local=False, parse_netmask=True,
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allow_loopback=False, allow_multicast=False):
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super(CheckedIPAddress, self).__init__(addr)
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if isinstance(addr, CheckedIPAddress):
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self.prefixlen = addr.prefixlen
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return
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if not parse_netmask and self._net:
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raise ValueError(
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"netmask and prefix length not allowed here: {}".format(addr))
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if self.version not in (4, 6):
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raise ValueError("unsupported IP version {}".format(self.version))
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if not allow_loopback and self.is_loopback():
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raise ValueError("cannot use loopback IP address {}".format(addr))
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if (not self.is_loopback() and self.is_reserved()) \
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or self in netaddr.ip.IPV4_6TO4:
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raise ValueError(
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"cannot use IANA reserved IP address {}".format(addr))
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if self.is_link_local():
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raise ValueError(
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"cannot use link-local IP address {}".format(addr))
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if not allow_multicast and self.is_multicast():
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raise ValueError("cannot use multicast IP address {}".format(addr))
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if match_local:
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if self.version == 4:
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family = netifaces.AF_INET
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elif self.version == 6:
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family = netifaces.AF_INET6
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else:
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raise ValueError(
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"Unsupported address family ({})".format(self.version)
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)
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iface = None
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for interface in netifaces.interfaces():
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for ifdata in netifaces.ifaddresses(interface).get(family, []):
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# link-local addresses contain '%suffix' that causes parse
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# errors in IPNetwork
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ifaddr = ifdata['addr'].split(u'%', 1)[0]
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ifnet = netaddr.IPNetwork('{addr}/{netmask}'.format(
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addr=ifaddr,
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netmask=ifdata['netmask']
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))
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if ifnet == self._net or (
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self._net is None and ifnet.ip == self):
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self._net = ifnet
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iface = interface
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break
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if iface is None:
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raise ValueError('no network interface matches the IP address '
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'and netmask {}'.format(addr))
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if self._net is None:
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if self.version == 4:
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self._net = netaddr.IPNetwork(
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netaddr.cidr_abbrev_to_verbose(str(self)))
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elif self.version == 6:
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self._net = netaddr.IPNetwork(str(self) + '/64')
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self.prefixlen = self._net.prefixlen
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def __getstate__(self):
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state = {
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'prefixlen': self.prefixlen,
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'super_state': super(CheckedIPAddress, self).__getstate__(),
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}
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return state
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def __setstate__(self, state):
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super(CheckedIPAddress, self).__setstate__(state['super_state'])
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self.prefixlen = state['prefixlen']
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def is_network_addr(self):
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return self == self._net.network
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def is_broadcast_addr(self):
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return self.version == 4 and self == self._net.broadcast
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def valid_ip(addr):
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return netaddr.valid_ipv4(addr) or netaddr.valid_ipv6(addr)
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def format_netloc(host, port=None):
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"""
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Format network location (host:port).
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If the host part is a literal IPv6 address, it must be enclosed in square
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brackets (RFC 2732).
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"""
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host = str(host)
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try:
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socket.inet_pton(socket.AF_INET6, host)
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host = '[%s]' % host
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except socket.error:
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pass
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if port is None:
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return host
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else:
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return '%s:%s' % (host, str(port))
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def realm_to_suffix(realm_name):
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'Convert a kerberos realm to a IPA suffix.'
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s = realm_name.split(".")
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suffix_dn = DN(*[('dc', x.lower()) for x in s])
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return suffix_dn
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def suffix_to_realm(suffix_dn):
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'Convert a IPA suffix to a kerberos realm.'
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assert isinstance(suffix_dn, DN)
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realm = '.'.join([x.value for x in suffix_dn])
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return realm
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def template_str(txt, vars):
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val = string.Template(txt).substitute(vars)
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# eval() is a special string one can insert into a template to have the
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# Python interpreter evaluate the string. This is intended to allow
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# math to be performed in templates.
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pattern = re.compile('(eval\s*\(([^()]*)\))')
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val = pattern.sub(lambda x: str(eval(x.group(2))), val)
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return val
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def template_file(infilename, vars):
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"""Read a file and perform template substitutions"""
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with open(infilename) as f:
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return template_str(f.read(), vars)
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def copy_template_file(infilename, outfilename, vars):
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"""Copy a file, performing template substitutions"""
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txt = template_file(infilename, vars)
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with open(outfilename, 'w') as file:
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file.write(txt)
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def write_tmp_file(txt):
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fd = tempfile.NamedTemporaryFile('w+')
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fd.write(txt)
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fd.flush()
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return fd
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def shell_quote(string):
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if isinstance(string, str):
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return "'" + string.replace("'", "'\\''") + "'"
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else:
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return b"'" + string.replace(b"'", b"'\\''") + b"'"
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if six.PY3:
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def _log_arg(s):
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"""Convert string or bytes to a string suitable for logging"""
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if isinstance(s, bytes):
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return s.decode(locale.getpreferredencoding(),
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errors='replace')
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else:
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return s
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else:
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_log_arg = str
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class _RunResult(collections.namedtuple('_RunResult',
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'output error_output returncode')):
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"""Result of ipautil.run"""
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def run(args, stdin=None, raiseonerr=True, nolog=(), env=None,
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capture_output=False, skip_output=False, cwd=None,
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runas=None, timeout=None, suplementary_groups=[],
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capture_error=False, encoding=None, redirect_output=False):
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"""
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Execute an external command.
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:param args: List of arguments for the command
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:param stdin: Optional input to the command
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:param raiseonerr: If True, raises an exception if the return code is
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not zero
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:param nolog: Tuple of strings that shouldn't be logged, like passwords.
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Each tuple consists of a string to be replaced by XXXXXXXX.
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Example:
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We have a command
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[paths.SETPASSWD, '--password', 'Secret123', 'someuser']
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and we don't want to log the password so nolog would be set to:
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('Secret123',)
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The resulting log output would be:
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/usr/bin/setpasswd --password XXXXXXXX someuser
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If a value isn't found in the list it is silently ignored.
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:param env: Dictionary of environment variables passed to the command.
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When None, current environment is copied
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:param capture_output: Capture stdout
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:param skip_output: Redirect the output to /dev/null and do not log it
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:param cwd: Current working directory
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:param runas: Name of a user that the command should be run as. The spawned
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process will have both real and effective UID and GID set.
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:param timeout: Timeout if the command hasn't returned within the specified
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number of seconds.
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:param suplementary_groups: List of group names that will be used as
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suplementary groups for subporcess.
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The option runas must be specified together with this option.
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:param capture_error: Capture stderr
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:param encoding: For Python 3, the encoding to use for output,
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error_output, and (if it's not bytes) stdin.
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If None, the current encoding according to locale is used.
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:param redirect_output: Redirect (error) output to standard (error) output.
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:return: An object with these attributes:
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`returncode`: The process' exit status
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`output` and `error_output`: captured output, as strings. Under
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Python 3, these are encoded with the given `encoding`.
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None unless `capture_output` or `capture_error`, respectively, are
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given
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`raw_output`, `raw_error_output`: captured output, as bytes.
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`output_log` and `error_log`: The captured output, as strings, with any
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unencodable characters discarded. These should only be used
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for logging or error messages.
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If skip_output is given, all output-related attributes on the result
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(that is, all except `returncode`) are None.
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For backwards compatibility, the return value can also be used as a
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(output, error_output, returncode) triple.
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"""
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assert isinstance(suplementary_groups, list)
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p_in = None
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p_out = None
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p_err = None
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if isinstance(nolog, six.string_types):
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# We expect a tuple (or list, or other iterable) of nolog strings.
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# Passing just a single string is bad: strings are iterable, so this
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# would result in every individual character of that string being
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# replaced by XXXXXXXX.
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# This is a sanity check to prevent that.
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raise ValueError('nolog must be a tuple of strings.')
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if skip_output and (capture_output or capture_error):
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raise ValueError('skip_output is incompatible with '
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'capture_output or capture_error')
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if redirect_output and (capture_output or capture_error):
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raise ValueError('redirect_output is incompatible with '
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'capture_output or capture_error')
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if skip_output and redirect_output:
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raise ValueError('skip_output is incompatible with redirect_output')
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if env is None:
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# copy default env
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env = copy.deepcopy(os.environ)
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env["PATH"] = "/bin:/sbin:/usr/kerberos/bin:/usr/kerberos/sbin:/usr/bin:/usr/sbin"
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if stdin:
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p_in = subprocess.PIPE
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if skip_output:
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p_out = p_err = open(paths.DEV_NULL, 'w')
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elif redirect_output:
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p_out = sys.stdout
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p_err = sys.stderr
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else:
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p_out = subprocess.PIPE
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p_err = subprocess.PIPE
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if encoding is None:
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encoding = locale.getpreferredencoding()
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if six.PY3 and isinstance(stdin, str):
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stdin = stdin.encode(encoding)
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if timeout:
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# If a timeout was provided, use the timeout command
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# to execute the requested command.
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args[0:0] = [paths.BIN_TIMEOUT, str(timeout)]
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arg_string = nolog_replace(' '.join(_log_arg(a) for a in args), nolog)
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root_logger.debug('Starting external process')
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root_logger.debug('args=%s' % arg_string)
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preexec_fn = None
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if runas is not None:
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pent = pwd.getpwnam(runas)
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suplementary_gids = [
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grp.getgrnam(group).gr_gid for group in suplementary_groups
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]
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root_logger.debug('runas=%s (UID %d, GID %s)', runas,
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pent.pw_uid, pent.pw_gid)
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if suplementary_groups:
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for group, gid in zip(suplementary_groups, suplementary_gids):
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root_logger.debug('suplementary_group=%s (GID %d)', group, gid)
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preexec_fn = lambda: (
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os.setgroups(suplementary_gids),
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os.setregid(pent.pw_gid, pent.pw_gid),
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os.setreuid(pent.pw_uid, pent.pw_uid),
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)
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try:
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p = subprocess.Popen(args, stdin=p_in, stdout=p_out, stderr=p_err,
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close_fds=True, env=env, cwd=cwd,
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preexec_fn=preexec_fn)
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stdout, stderr = p.communicate(stdin)
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except KeyboardInterrupt:
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root_logger.debug('Process interrupted')
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p.wait()
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raise
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except:
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root_logger.debug('Process execution failed')
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raise
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finally:
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if skip_output:
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p_out.close() # pylint: disable=E1103
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if timeout and p.returncode == 124:
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root_logger.debug('Process did not complete before timeout')
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root_logger.debug('Process finished, return code=%s', p.returncode)
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# The command and its output may include passwords that we don't want
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# to log. Replace those.
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if skip_output or redirect_output:
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output_log = None
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error_log = None
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else:
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if six.PY3:
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output_log = stdout.decode(locale.getpreferredencoding(),
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errors='replace')
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else:
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output_log = stdout
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if six.PY3:
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error_log = stderr.decode(locale.getpreferredencoding(),
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errors='replace')
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else:
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error_log = stderr
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output_log = nolog_replace(output_log, nolog)
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root_logger.debug('stdout=%s' % output_log)
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error_log = nolog_replace(error_log, nolog)
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root_logger.debug('stderr=%s' % error_log)
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if capture_output:
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if six.PY2:
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output = stdout
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else:
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output = stdout.decode(encoding)
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else:
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output = None
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if capture_error:
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if six.PY2:
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error_output = stderr
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else:
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error_output = stderr.decode(encoding)
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else:
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error_output = None
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if p.returncode != 0 and raiseonerr:
|
|
raise CalledProcessError(p.returncode, arg_string, str(output))
|
|
|
|
result = _RunResult(output, error_output, p.returncode)
|
|
result.raw_output = stdout
|
|
result.raw_error_output = stderr
|
|
result.output_log = output_log
|
|
result.error_log = error_log
|
|
return result
|
|
|
|
|
|
def nolog_replace(string, nolog):
|
|
"""Replace occurences of strings given in `nolog` with XXXXXXXX"""
|
|
for value in nolog:
|
|
if not value or not isinstance(value, six.string_types):
|
|
continue
|
|
|
|
quoted = urllib.parse.quote(value)
|
|
shquoted = shell_quote(value)
|
|
for nolog_value in (shquoted, value, quoted):
|
|
string = string.replace(nolog_value, 'XXXXXXXX')
|
|
return string
|
|
|
|
|
|
def file_exists(filename):
|
|
try:
|
|
mode = os.stat(filename)[stat.ST_MODE]
|
|
if stat.S_ISREG(mode):
|
|
return True
|
|
else:
|
|
return False
|
|
except Exception:
|
|
return False
|
|
|
|
def dir_exists(filename):
|
|
try:
|
|
mode = os.stat(filename)[stat.ST_MODE]
|
|
if stat.S_ISDIR(mode):
|
|
return True
|
|
else:
|
|
return False
|
|
except Exception:
|
|
return False
|
|
|
|
|
|
def install_file(fname, dest):
|
|
# SELinux: use copy to keep the right context
|
|
if file_exists(dest):
|
|
os.rename(dest, dest + ".orig")
|
|
shutil.copy(fname, dest)
|
|
os.remove(fname)
|
|
|
|
|
|
def backup_file(fname):
|
|
if file_exists(fname):
|
|
os.rename(fname, fname + ".orig")
|
|
|
|
def _ensure_nonempty_string(string, message):
|
|
if not isinstance(string, str) or not string:
|
|
raise ValueError(message)
|
|
|
|
# uses gpg to compress and encrypt a file
|
|
def encrypt_file(source, dest, password, workdir = None):
|
|
_ensure_nonempty_string(source, 'Missing Source File')
|
|
#stat it so that we get back an exception if it does no t exist
|
|
os.stat(source)
|
|
|
|
_ensure_nonempty_string(dest, 'Missing Destination File')
|
|
_ensure_nonempty_string(password, 'Missing Password')
|
|
|
|
#create a tempdir so that we can clean up with easily
|
|
tempdir = tempfile.mkdtemp('', 'ipa-', workdir)
|
|
gpgdir = tempdir+"/.gnupg"
|
|
|
|
try:
|
|
try:
|
|
#give gpg a fake dir so that we can leater remove all
|
|
#the cruft when we clean up the tempdir
|
|
os.mkdir(gpgdir)
|
|
args = [paths.GPG_AGENT, '--batch', '--homedir', gpgdir, '--daemon', paths.GPG, '--batch', '--homedir', gpgdir, '--passphrase-fd', '0', '--yes', '--no-tty', '-o', dest, '-c', source]
|
|
run(args, password, skip_output=True)
|
|
except:
|
|
raise
|
|
finally:
|
|
#job done, clean up
|
|
shutil.rmtree(tempdir, ignore_errors=True)
|
|
|
|
|
|
def decrypt_file(source, dest, password, workdir = None):
|
|
_ensure_nonempty_string(source, 'Missing Source File')
|
|
#stat it so that we get back an exception if it does no t exist
|
|
os.stat(source)
|
|
|
|
_ensure_nonempty_string(dest, 'Missing Destination File')
|
|
_ensure_nonempty_string(password, 'Missing Password')
|
|
|
|
#create a tempdir so that we can clean up with easily
|
|
tempdir = tempfile.mkdtemp('', 'ipa-', workdir)
|
|
gpgdir = tempdir+"/.gnupg"
|
|
|
|
try:
|
|
try:
|
|
#give gpg a fake dir so that we can leater remove all
|
|
#the cruft when we clean up the tempdir
|
|
os.mkdir(gpgdir)
|
|
args = [paths.GPG_AGENT, '--batch', '--homedir', gpgdir, '--daemon', paths.GPG, '--batch', '--homedir', gpgdir, '--passphrase-fd', '0', '--yes', '--no-tty', '-o', dest, '-d', source]
|
|
run(args, password, skip_output=True)
|
|
except:
|
|
raise
|
|
finally:
|
|
#job done, clean up
|
|
shutil.rmtree(tempdir, ignore_errors=True)
|
|
|
|
|
|
class CIDict(dict):
|
|
"""
|
|
Case-insensitive but case-respecting dictionary.
|
|
|
|
This code is derived from python-ldap's cidict.py module,
|
|
written by stroeder: http://python-ldap.sourceforge.net/
|
|
|
|
This version extends 'dict' so it works properly with TurboGears.
|
|
If you extend UserDict, isinstance(foo, dict) returns false.
|
|
"""
|
|
|
|
def __init__(self, default=None, **kwargs):
|
|
super(CIDict, self).__init__()
|
|
self._keys = {} # mapping of lowercased keys to proper case
|
|
if default:
|
|
self.update(default)
|
|
if kwargs:
|
|
self.update(kwargs)
|
|
|
|
def __getitem__(self, key):
|
|
return super(CIDict, self).__getitem__(key.lower())
|
|
|
|
def __setitem__(self, key, value, seen_keys=None):
|
|
"""cidict[key] = value
|
|
|
|
The ``seen_keys`` argument is used by ``update()`` to keep track of
|
|
duplicate keys. It should be an initially empty set that is
|
|
passed to all calls to __setitem__ that should not set duplicate keys.
|
|
"""
|
|
lower_key = key.lower()
|
|
if seen_keys is not None:
|
|
if lower_key in seen_keys:
|
|
raise ValueError('Duplicate key in update: %s' % key)
|
|
seen_keys.add(lower_key)
|
|
self._keys[lower_key] = key
|
|
return super(CIDict, self).__setitem__(lower_key, value)
|
|
|
|
def __delitem__(self, key):
|
|
lower_key = key.lower()
|
|
del self._keys[lower_key]
|
|
return super(CIDict, self).__delitem__(lower_key)
|
|
|
|
def update(self, new=None, **kwargs):
|
|
"""Update self from dict/iterable new and kwargs
|
|
|
|
Functions like ``dict.update()``.
|
|
|
|
Neither ``new`` nor ``kwargs`` may contain two keys that only differ in
|
|
case, as this situation would result in loss of data.
|
|
"""
|
|
seen = set()
|
|
if new:
|
|
try:
|
|
keys = new.keys
|
|
except AttributeError:
|
|
self.update(dict(new))
|
|
else:
|
|
for key in keys():
|
|
self.__setitem__(key, new[key], seen)
|
|
seen = set()
|
|
for key, value in kwargs.items():
|
|
self.__setitem__(key, value, seen)
|
|
|
|
def __contains__(self, key):
|
|
return super(CIDict, self).__contains__(key.lower())
|
|
|
|
if six.PY2:
|
|
def has_key(self, key):
|
|
return super(CIDict, self).has_key(key.lower())
|
|
|
|
def get(self, key, failobj=None):
|
|
try:
|
|
return self[key]
|
|
except KeyError:
|
|
return failobj
|
|
|
|
def __iter__(self):
|
|
return six.itervalues(self._keys)
|
|
|
|
def keys(self):
|
|
if six.PY2:
|
|
return list(self.iterkeys())
|
|
else:
|
|
return self.iterkeys()
|
|
|
|
def items(self):
|
|
if six.PY2:
|
|
return list(self.iteritems())
|
|
else:
|
|
return self.iteritems()
|
|
|
|
def values(self):
|
|
if six.PY2:
|
|
return list(self.itervalues())
|
|
else:
|
|
return self.itervalues()
|
|
|
|
def copy(self):
|
|
"""Returns a shallow copy of this CIDict"""
|
|
return CIDict(list(self.items()))
|
|
|
|
def iteritems(self):
|
|
return ((k, self[k]) for k in six.itervalues(self._keys))
|
|
|
|
def iterkeys(self):
|
|
return six.itervalues(self._keys)
|
|
|
|
def itervalues(self):
|
|
return (v for k, v in six.iteritems(self))
|
|
|
|
def setdefault(self, key, value=None):
|
|
try:
|
|
return self[key]
|
|
except KeyError:
|
|
self[key] = value
|
|
return value
|
|
|
|
def pop(self, key, *args):
|
|
try:
|
|
value = self[key]
|
|
del self[key]
|
|
return value
|
|
except KeyError:
|
|
if len(args) == 1:
|
|
return args[0]
|
|
raise
|
|
|
|
def popitem(self):
|
|
(lower_key, value) = super(CIDict, self).popitem()
|
|
key = self._keys[lower_key]
|
|
del self._keys[lower_key]
|
|
|
|
return (key, value)
|
|
|
|
def clear(self):
|
|
self._keys.clear()
|
|
return super(CIDict, self).clear()
|
|
|
|
def viewitems(self):
|
|
raise NotImplementedError('CIDict.viewitems is not implemented')
|
|
|
|
def viewkeys(self):
|
|
raise NotImplementedError('CIDict.viewkeys is not implemented')
|
|
|
|
def viewvvalues(self):
|
|
raise NotImplementedError('CIDict.viewvvalues is not implemented')
|
|
|
|
|
|
class GeneralizedTimeZone(datetime.tzinfo):
|
|
"""This class is a basic timezone wrapper for the offset specified
|
|
in a Generalized Time. It is dst-ignorant."""
|
|
def __init__(self,offsetstr="Z"):
|
|
super(GeneralizedTimeZone, self).__init__()
|
|
|
|
self.name = offsetstr
|
|
self.houroffset = 0
|
|
self.minoffset = 0
|
|
|
|
if offsetstr == "Z":
|
|
self.houroffset = 0
|
|
self.minoffset = 0
|
|
else:
|
|
if (len(offsetstr) >= 3) and re.match(r'[-+]\d\d', offsetstr):
|
|
self.houroffset = int(offsetstr[0:3])
|
|
offsetstr = offsetstr[3:]
|
|
if (len(offsetstr) >= 2) and re.match(r'\d\d', offsetstr):
|
|
self.minoffset = int(offsetstr[0:2])
|
|
offsetstr = offsetstr[2:]
|
|
if len(offsetstr) > 0:
|
|
raise ValueError()
|
|
if self.houroffset < 0:
|
|
self.minoffset *= -1
|
|
|
|
def utcoffset(self, dt):
|
|
return datetime.timedelta(hours=self.houroffset, minutes=self.minoffset)
|
|
|
|
def dst(self):
|
|
return datetime.timedelta(0)
|
|
|
|
def tzname(self):
|
|
return self.name
|
|
|
|
|
|
def parse_generalized_time(timestr):
|
|
"""Parses are Generalized Time string (as specified in X.680),
|
|
returning a datetime object. Generalized Times are stored inside
|
|
the krbPasswordExpiration attribute in LDAP.
|
|
|
|
This method doesn't attempt to be perfect wrt timezones. If python
|
|
can't be bothered to implement them, how can we..."""
|
|
|
|
if len(timestr) < 8:
|
|
return None
|
|
try:
|
|
date = timestr[:8]
|
|
time = timestr[8:]
|
|
|
|
year = int(date[:4])
|
|
month = int(date[4:6])
|
|
day = int(date[6:8])
|
|
|
|
hour = min = sec = msec = 0
|
|
tzone = None
|
|
|
|
if (len(time) >= 2) and re.match(r'\d', time[0]):
|
|
hour = int(time[:2])
|
|
time = time[2:]
|
|
if len(time) >= 2 and (time[0] == "," or time[0] == "."):
|
|
hour_fraction = "."
|
|
time = time[1:]
|
|
while (len(time) > 0) and re.match(r'\d', time[0]):
|
|
hour_fraction += time[0]
|
|
time = time[1:]
|
|
total_secs = int(float(hour_fraction) * 3600)
|
|
min, sec = divmod(total_secs, 60)
|
|
|
|
if (len(time) >= 2) and re.match(r'\d', time[0]):
|
|
min = int(time[:2])
|
|
time = time[2:]
|
|
if len(time) >= 2 and (time[0] == "," or time[0] == "."):
|
|
min_fraction = "."
|
|
time = time[1:]
|
|
while (len(time) > 0) and re.match(r'\d', time[0]):
|
|
min_fraction += time[0]
|
|
time = time[1:]
|
|
sec = int(float(min_fraction) * 60)
|
|
|
|
if (len(time) >= 2) and re.match(r'\d', time[0]):
|
|
sec = int(time[:2])
|
|
time = time[2:]
|
|
if len(time) >= 2 and (time[0] == "," or time[0] == "."):
|
|
sec_fraction = "."
|
|
time = time[1:]
|
|
while (len(time) > 0) and re.match(r'\d', time[0]):
|
|
sec_fraction += time[0]
|
|
time = time[1:]
|
|
msec = int(float(sec_fraction) * 1000000)
|
|
|
|
if (len(time) > 0):
|
|
tzone = GeneralizedTimeZone(time)
|
|
|
|
return datetime.datetime(year, month, day, hour, min, sec, msec, tzone)
|
|
|
|
except ValueError:
|
|
return None
|
|
|
|
def ipa_generate_password(characters=None,pwd_len=None):
|
|
''' Generates password. Password cannot start or end with a whitespace
|
|
character. It also cannot be formed by whitespace characters only.
|
|
Length of password as well as string of characters to be used by
|
|
generator could be optionaly specified by characters and pwd_len
|
|
parameters, otherwise default values will be used: characters string
|
|
will be formed by all printable non-whitespace characters and space,
|
|
pwd_len will be equal to value of GEN_PWD_LEN.
|
|
'''
|
|
if not characters:
|
|
characters=string.digits + string.ascii_letters + string.punctuation + ' '
|
|
else:
|
|
if characters.isspace():
|
|
raise ValueError("password cannot be formed by whitespaces only")
|
|
if not pwd_len:
|
|
pwd_len = GEN_PWD_LEN
|
|
|
|
upper_bound = len(characters) - 1
|
|
rndpwd = ''
|
|
r = random.SystemRandom()
|
|
|
|
for x in range(pwd_len):
|
|
rndchar = characters[r.randint(0,upper_bound)]
|
|
if (x == 0) or (x == pwd_len-1):
|
|
while rndchar.isspace():
|
|
rndchar = characters[r.randint(0,upper_bound)]
|
|
rndpwd += rndchar
|
|
return rndpwd
|
|
|
|
def user_input(prompt, default = None, allow_empty = True):
|
|
if default == None:
|
|
while True:
|
|
try:
|
|
ret = input("%s: " % prompt)
|
|
if allow_empty or ret.strip():
|
|
return ret.strip()
|
|
except EOFError:
|
|
if allow_empty:
|
|
return ''
|
|
raise RuntimeError("Failed to get user input")
|
|
|
|
if isinstance(default, six.string_types):
|
|
while True:
|
|
try:
|
|
ret = input("%s [%s]: " % (prompt, default))
|
|
if not ret and (allow_empty or default):
|
|
return default
|
|
elif ret.strip():
|
|
return ret.strip()
|
|
except EOFError:
|
|
return default
|
|
|
|
if isinstance(default, bool):
|
|
choice = "yes" if default else "no"
|
|
while True:
|
|
try:
|
|
ret = input("%s [%s]: " % (prompt, choice))
|
|
ret = ret.strip()
|
|
if not ret:
|
|
return default
|
|
elif ret.lower()[0] == "y":
|
|
return True
|
|
elif ret.lower()[0] == "n":
|
|
return False
|
|
except EOFError:
|
|
return default
|
|
|
|
if isinstance(default, int):
|
|
while True:
|
|
try:
|
|
ret = input("%s [%s]: " % (prompt, default))
|
|
ret = ret.strip()
|
|
if not ret:
|
|
return default
|
|
ret = int(ret)
|
|
except ValueError:
|
|
pass
|
|
except EOFError:
|
|
return default
|
|
else:
|
|
return ret
|
|
|
|
|
|
def host_port_open(host, port, socket_type=socket.SOCK_STREAM, socket_timeout=None):
|
|
for res in socket.getaddrinfo(host, port, socket.AF_UNSPEC, socket_type):
|
|
af, socktype, proto, canonname, sa = res
|
|
try:
|
|
try:
|
|
s = socket.socket(af, socktype, proto)
|
|
except socket.error:
|
|
s = None
|
|
continue
|
|
|
|
if socket_timeout is not None:
|
|
s.settimeout(socket_timeout)
|
|
|
|
s.connect(sa)
|
|
|
|
if socket_type == socket.SOCK_DGRAM:
|
|
s.send('')
|
|
s.recv(512)
|
|
|
|
return True
|
|
except socket.error as e:
|
|
pass
|
|
finally:
|
|
if s:
|
|
s.close()
|
|
|
|
return False
|
|
|
|
def bind_port_responder(port, socket_type=socket.SOCK_STREAM, socket_timeout=None, responder_data=None):
|
|
host = None # all available interfaces
|
|
last_socket_error = None
|
|
|
|
# At first try to create IPv6 socket as it is able to accept both IPv6 and
|
|
# IPv4 connections (when not turned off)
|
|
families = (socket.AF_INET6, socket.AF_INET)
|
|
s = None
|
|
|
|
for family in families:
|
|
try:
|
|
addr_infos = socket.getaddrinfo(host, port, family, socket_type, 0,
|
|
socket.AI_PASSIVE)
|
|
except socket.error as e:
|
|
last_socket_error = e
|
|
continue
|
|
for res in addr_infos:
|
|
af, socktype, proto, canonname, sa = res
|
|
try:
|
|
s = socket.socket(af, socktype, proto)
|
|
except socket.error as e:
|
|
last_socket_error = e
|
|
s = None
|
|
continue
|
|
|
|
if socket_timeout is not None:
|
|
s.settimeout(1)
|
|
|
|
if af == socket.AF_INET6:
|
|
try:
|
|
# Make sure IPv4 clients can connect to IPv6 socket
|
|
s.setsockopt(socket.IPPROTO_IPV6, socket.IPV6_V6ONLY, 0)
|
|
except socket.error:
|
|
pass
|
|
|
|
if socket_type == socket.SOCK_STREAM:
|
|
s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
|
|
|
|
try:
|
|
s.bind(sa)
|
|
|
|
while True:
|
|
if socket_type == socket.SOCK_STREAM:
|
|
s.listen(1)
|
|
connection, client_address = s.accept()
|
|
try:
|
|
if responder_data:
|
|
connection.sendall(responder_data)
|
|
finally:
|
|
connection.close()
|
|
elif socket_type == socket.SOCK_DGRAM:
|
|
data, addr = s.recvfrom(1)
|
|
|
|
if responder_data:
|
|
s.sendto(responder_data, addr)
|
|
except socket.timeout:
|
|
# Timeout is expectable as it was requested by caller, raise
|
|
# the exception back to him
|
|
raise
|
|
except socket.error as e:
|
|
last_socket_error = e
|
|
s.close()
|
|
s = None
|
|
continue
|
|
finally:
|
|
if s:
|
|
s.close()
|
|
|
|
if s is None and last_socket_error is not None:
|
|
raise last_socket_error # pylint: disable=E0702
|
|
|
|
|
|
def reverse_record_exists(ip_address):
|
|
"""
|
|
Checks if IP address have some reverse record somewhere.
|
|
Does not care where it points.
|
|
|
|
Returns True/False
|
|
"""
|
|
reverse = reversename.from_address(str(ip_address))
|
|
try:
|
|
resolver.query(reverse, "PTR")
|
|
except DNSException:
|
|
# really don't care what exception, PTR is simply unresolvable
|
|
return False
|
|
return True
|
|
|
|
|
|
def config_replace_variables(filepath, replacevars=dict(), appendvars=dict()):
|
|
"""
|
|
Take a key=value based configuration file, and write new version
|
|
with certain values replaced or appended
|
|
|
|
All (key,value) pairs from replacevars and appendvars that were not found
|
|
in the configuration file, will be added there.
|
|
|
|
It is responsibility of a caller to ensure that replacevars and
|
|
appendvars do not overlap.
|
|
|
|
It is responsibility of a caller to back up file.
|
|
|
|
returns dictionary of affected keys and their previous values
|
|
|
|
One have to run restore_context(filepath) afterwards or
|
|
security context of the file will not be correct after modification
|
|
"""
|
|
pattern = re.compile('''
|
|
(^
|
|
\s*
|
|
(?P<option> [^\#;]+?)
|
|
(\s*=\s*)
|
|
(?P<value> .+?)?
|
|
(\s*((\#|;).*)?)?
|
|
$)''', re.VERBOSE)
|
|
orig_stat = os.stat(filepath)
|
|
old_values = dict()
|
|
temp_filename = None
|
|
with tempfile.NamedTemporaryFile(delete=False) as new_config:
|
|
temp_filename = new_config.name
|
|
with open(filepath, 'r') as f:
|
|
for line in f:
|
|
new_line = line
|
|
m = pattern.match(line)
|
|
if m:
|
|
option, value = m.group('option', 'value')
|
|
if option is not None:
|
|
if replacevars and option in replacevars:
|
|
# replace value completely
|
|
new_line = u"%s=%s\n" % (option, replacevars[option])
|
|
old_values[option] = value
|
|
if appendvars and option in appendvars:
|
|
# append new value unless it is already existing in the original one
|
|
if not value:
|
|
new_line = u"%s=%s\n" % (option, appendvars[option])
|
|
elif value.find(appendvars[option]) == -1:
|
|
new_line = u"%s=%s %s\n" % (option, value, appendvars[option])
|
|
old_values[option] = value
|
|
new_config.write(new_line)
|
|
# Now add all options from replacevars and appendvars that were not found in the file
|
|
new_vars = replacevars.copy()
|
|
new_vars.update(appendvars)
|
|
newvars_view = set(new_vars.keys()) - set(old_values.keys())
|
|
append_view = (set(appendvars.keys()) - newvars_view)
|
|
for item in newvars_view:
|
|
new_config.write("%s=%s\n" % (item,new_vars[item]))
|
|
for item in append_view:
|
|
new_config.write("%s=%s\n" % (item,appendvars[item]))
|
|
new_config.flush()
|
|
# Make sure the resulting file is readable by others before installing it
|
|
os.fchmod(new_config.fileno(), orig_stat.st_mode)
|
|
os.fchown(new_config.fileno(), orig_stat.st_uid, orig_stat.st_gid)
|
|
|
|
# At this point new_config is closed but not removed due to 'delete=False' above
|
|
# Now, install the temporary file as configuration and ensure old version is available as .orig
|
|
# While .orig file is not used during uninstall, it is left there for administrator.
|
|
install_file(temp_filename, filepath)
|
|
|
|
return old_values
|
|
|
|
def inifile_replace_variables(filepath, section, replacevars=dict(), appendvars=dict()):
|
|
"""
|
|
Take a section-structured key=value based configuration file, and write new version
|
|
with certain values replaced or appended within the section
|
|
|
|
All (key,value) pairs from replacevars and appendvars that were not found
|
|
in the configuration file, will be added there.
|
|
|
|
It is responsibility of a caller to ensure that replacevars and
|
|
appendvars do not overlap.
|
|
|
|
It is responsibility of a caller to back up file.
|
|
|
|
returns dictionary of affected keys and their previous values
|
|
|
|
One have to run restore_context(filepath) afterwards or
|
|
security context of the file will not be correct after modification
|
|
"""
|
|
pattern = re.compile('''
|
|
(^
|
|
\[
|
|
(?P<section> .+) \]
|
|
(\s+((\#|;).*)?)?
|
|
$)|(^
|
|
\s*
|
|
(?P<option> [^\#;]+?)
|
|
(\s*=\s*)
|
|
(?P<value> .+?)?
|
|
(\s*((\#|;).*)?)?
|
|
$)''', re.VERBOSE)
|
|
def add_options(config, replacevars, appendvars, oldvars):
|
|
# add all options from replacevars and appendvars that were not found in the file
|
|
new_vars = replacevars.copy()
|
|
new_vars.update(appendvars)
|
|
newvars_view = set(new_vars.keys()) - set(oldvars.keys())
|
|
append_view = (set(appendvars.keys()) - newvars_view)
|
|
for item in newvars_view:
|
|
config.write("%s=%s\n" % (item,new_vars[item]))
|
|
for item in append_view:
|
|
config.write("%s=%s\n" % (item,appendvars[item]))
|
|
|
|
orig_stat = os.stat(filepath)
|
|
old_values = dict()
|
|
temp_filename = None
|
|
with tempfile.NamedTemporaryFile(delete=False) as new_config:
|
|
temp_filename = new_config.name
|
|
with open(filepath, 'r') as f:
|
|
in_section = False
|
|
finished = False
|
|
line_idx = 1
|
|
for line in f:
|
|
line_idx = line_idx + 1
|
|
new_line = line
|
|
m = pattern.match(line)
|
|
if m:
|
|
sect, option, value = m.group('section', 'option', 'value')
|
|
if in_section and sect is not None:
|
|
# End of the searched section, add remaining options
|
|
add_options(new_config, replacevars, appendvars, old_values)
|
|
finished = True
|
|
if sect is not None:
|
|
# New section is found, check whether it is the one we are looking for
|
|
in_section = (str(sect).lower() == str(section).lower())
|
|
if option is not None and in_section:
|
|
# Great, this is an option from the section we are loking for
|
|
if replacevars and option in replacevars:
|
|
# replace value completely
|
|
new_line = u"%s=%s\n" % (option, replacevars[option])
|
|
old_values[option] = value
|
|
if appendvars and option in appendvars:
|
|
# append a new value unless it is already existing in the original one
|
|
if not value:
|
|
new_line = u"%s=%s\n" % (option, appendvars[option])
|
|
elif value.find(appendvars[option]) == -1:
|
|
new_line = u"%s=%s %s\n" % (option, value, appendvars[option])
|
|
old_values[option] = value
|
|
new_config.write(new_line)
|
|
# We have finished parsing the original file.
|
|
# There are two remaining cases:
|
|
# 1. Section we were looking for was not found, we need to add it.
|
|
if not (in_section or finished):
|
|
new_config.write("[%s]\n" % (section))
|
|
# 2. The section is the last one but some options were not found, add them.
|
|
if in_section or not finished:
|
|
add_options(new_config, replacevars, appendvars, old_values)
|
|
|
|
new_config.flush()
|
|
# Make sure the resulting file is readable by others before installing it
|
|
os.fchmod(new_config.fileno(), orig_stat.st_mode)
|
|
os.fchown(new_config.fileno(), orig_stat.st_uid, orig_stat.st_gid)
|
|
|
|
# At this point new_config is closed but not removed due to 'delete=False' above
|
|
# Now, install the temporary file as configuration and ensure old version is available as .orig
|
|
# While .orig file is not used during uninstall, it is left there for administrator.
|
|
install_file(temp_filename, filepath)
|
|
|
|
return old_values
|
|
|
|
def backup_config_and_replace_variables(
|
|
fstore, filepath, replacevars=dict(), appendvars=dict()):
|
|
"""
|
|
Take a key=value based configuration file, back up it, and
|
|
write new version with certain values replaced or appended
|
|
|
|
All (key,value) pairs from replacevars and appendvars that
|
|
were not found in the configuration file, will be added there.
|
|
The file must exist before this function is called.
|
|
|
|
It is responsibility of a caller to ensure that replacevars and
|
|
appendvars do not overlap.
|
|
|
|
returns dictionary of affected keys and their previous values
|
|
|
|
One have to run restore_context(filepath) afterwards or
|
|
security context of the file will not be correct after modification
|
|
"""
|
|
# Backup original filepath
|
|
fstore.backup_file(filepath)
|
|
old_values = config_replace_variables(filepath, replacevars, appendvars)
|
|
|
|
return old_values
|
|
|
|
|
|
def wait_for_open_ports(host, ports, timeout=0):
|
|
"""
|
|
Wait until the specified port(s) on the remote host are open. Timeout
|
|
in seconds may be specified to limit the wait. If the timeout is
|
|
exceeded, socket.timeout exception is raised.
|
|
"""
|
|
timeout = float(timeout)
|
|
if not isinstance(ports, (tuple, list)):
|
|
ports = [ports]
|
|
|
|
root_logger.debug('wait_for_open_ports: %s %s timeout %d', host, ports, timeout)
|
|
op_timeout = time.time() + timeout
|
|
|
|
for port in ports:
|
|
while True:
|
|
port_open = host_port_open(host, port)
|
|
|
|
if port_open:
|
|
break
|
|
if timeout and time.time() > op_timeout: # timeout exceeded
|
|
raise socket.timeout("Timeout exceeded")
|
|
time.sleep(1)
|
|
|
|
def wait_for_open_socket(socket_name, timeout=0):
|
|
"""
|
|
Wait until the specified socket on the local host is open. Timeout
|
|
in seconds may be specified to limit the wait.
|
|
"""
|
|
timeout = float(timeout)
|
|
op_timeout = time.time() + timeout
|
|
|
|
while True:
|
|
try:
|
|
s = socket.socket(socket.AF_UNIX)
|
|
s.connect(socket_name)
|
|
s.close()
|
|
break
|
|
except socket.error as e:
|
|
if e.errno in (2,111): # 111: Connection refused, 2: File not found
|
|
if timeout and time.time() > op_timeout: # timeout exceeded
|
|
raise e
|
|
time.sleep(1)
|
|
else:
|
|
raise e
|
|
|
|
|
|
def kinit_keytab(principal, keytab, ccache_name, config=None, attempts=1):
|
|
"""
|
|
Given a ccache_path, keytab file and a principal kinit as that user.
|
|
|
|
The optional parameter 'attempts' specifies how many times the credential
|
|
initialization should be attempted in case of non-responsive KDC.
|
|
"""
|
|
errors_to_retry = {KRB5KDC_ERR_SVC_UNAVAILABLE,
|
|
KRB5_KDC_UNREACH}
|
|
root_logger.debug("Initializing principal %s using keytab %s"
|
|
% (principal, keytab))
|
|
root_logger.debug("using ccache %s" % ccache_name)
|
|
for attempt in range(1, attempts + 1):
|
|
old_config = os.environ.get('KRB5_CONFIG')
|
|
if config is not None:
|
|
os.environ['KRB5_CONFIG'] = config
|
|
else:
|
|
os.environ.pop('KRB5_CONFIG', None)
|
|
try:
|
|
name = gssapi.Name(principal, gssapi.NameType.kerberos_principal)
|
|
store = {'ccache': ccache_name,
|
|
'client_keytab': keytab}
|
|
cred = gssapi.Credentials(name=name, store=store, usage='initiate')
|
|
root_logger.debug("Attempt %d/%d: success"
|
|
% (attempt, attempts))
|
|
return cred
|
|
except gssapi.exceptions.GSSError as e:
|
|
if e.min_code not in errors_to_retry: # pylint: disable=no-member
|
|
raise
|
|
root_logger.debug("Attempt %d/%d: failed: %s"
|
|
% (attempt, attempts, e))
|
|
if attempt == attempts:
|
|
root_logger.debug("Maximum number of attempts (%d) reached"
|
|
% attempts)
|
|
raise
|
|
root_logger.debug("Waiting 5 seconds before next retry")
|
|
time.sleep(5)
|
|
finally:
|
|
if old_config is not None:
|
|
os.environ['KRB5_CONFIG'] = old_config
|
|
else:
|
|
os.environ.pop('KRB5_CONFIG', None)
|
|
|
|
|
|
def kinit_password(principal, password, ccache_name, config=None,
|
|
armor_ccache_name=None, canonicalize=False,
|
|
enterprise=False):
|
|
"""
|
|
perform interactive kinit as principal using password. If using FAST for
|
|
web-based authentication, use armor_ccache_path to specify http service
|
|
ccache.
|
|
"""
|
|
root_logger.debug("Initializing principal %s using password" % principal)
|
|
args = [paths.KINIT, principal, '-c', ccache_name]
|
|
if armor_ccache_name is not None:
|
|
root_logger.debug("Using armor ccache %s for FAST webauth"
|
|
% armor_ccache_name)
|
|
args.extend(['-T', armor_ccache_name])
|
|
|
|
if canonicalize:
|
|
root_logger.debug("Requesting principal canonicalization")
|
|
args.append('-C')
|
|
|
|
if enterprise:
|
|
root_logger.debug("Using enterprise principal")
|
|
args.append('-E')
|
|
|
|
env = {'LC_ALL': 'C'}
|
|
if config is not None:
|
|
env['KRB5_CONFIG'] = config
|
|
|
|
# this workaround enables us to capture stderr and put it
|
|
# into the raised exception in case of unsuccessful authentication
|
|
result = run(args, stdin=password, env=env, raiseonerr=False,
|
|
capture_error=True)
|
|
if result.returncode:
|
|
raise RuntimeError(result.error_output)
|
|
|
|
|
|
def dn_attribute_property(private_name):
|
|
'''
|
|
Create a property for a dn attribute which assures the attribute
|
|
is a DN or None. If the value is not None the setter converts it to
|
|
a DN. The getter assures it's either None or a DN instance.
|
|
|
|
The private_name parameter is the class internal attribute the property
|
|
shadows.
|
|
|
|
For example if a class has an attribute called base_dn, then:
|
|
|
|
base_dn = dn_attribute_property('_base_dn')
|
|
|
|
Thus the class with have an attriubte called base_dn which can only
|
|
ever be None or a DN instance. The actual value is stored in _base_dn.
|
|
'''
|
|
|
|
def setter(self, value):
|
|
if value is not None:
|
|
value = DN(value)
|
|
setattr(self, private_name, value)
|
|
|
|
def getter(self):
|
|
value = getattr(self, private_name)
|
|
if value is not None:
|
|
assert isinstance(value, DN)
|
|
return value
|
|
|
|
return property(getter, setter)
|
|
|
|
def posixify(string):
|
|
"""
|
|
Convert a string to a more strict alpha-numeric representation.
|
|
|
|
- Alpha-numeric, underscore, dot and dash characters are accepted
|
|
- Space is converted to underscore
|
|
- Other characters are omitted
|
|
- Leading dash is stripped
|
|
|
|
Note: This mapping is not one-to-one and may map different input to the
|
|
same result. When using posixify, make sure the you do not map two different
|
|
entities to one unintentionally.
|
|
"""
|
|
|
|
def valid_char(char):
|
|
return char.isalnum() or char in ('_', '.', '-')
|
|
|
|
# First replace space characters
|
|
replaced = string.replace(' ','_')
|
|
omitted = ''.join(filter(valid_char, replaced))
|
|
|
|
# Leading dash is not allowed
|
|
return omitted.lstrip('-')
|
|
|
|
@contextmanager
|
|
def private_ccache(path=None):
|
|
|
|
if path is None:
|
|
dir_path = tempfile.mkdtemp(prefix='krbcc')
|
|
path = os.path.join(dir_path, 'ccache')
|
|
else:
|
|
dir_path = None
|
|
|
|
original_value = os.environ.get('KRB5CCNAME', None)
|
|
|
|
os.environ['KRB5CCNAME'] = path
|
|
|
|
try:
|
|
yield
|
|
finally:
|
|
if original_value is not None:
|
|
os.environ['KRB5CCNAME'] = original_value
|
|
else:
|
|
os.environ.pop('KRB5CCNAME', None)
|
|
|
|
if os.path.exists(path):
|
|
os.remove(path)
|
|
if dir_path is not None:
|
|
try:
|
|
os.rmdir(dir_path)
|
|
except OSError:
|
|
pass
|
|
|
|
|
|
if six.PY2:
|
|
def fsdecode(value):
|
|
"""
|
|
Decode argument using the file system encoding, as returned by
|
|
`sys.getfilesystemencoding()`.
|
|
"""
|
|
if isinstance(value, six.binary_type):
|
|
return value.decode(sys.getfilesystemencoding())
|
|
elif isinstance(value, six.text_type):
|
|
return value
|
|
else:
|
|
raise TypeError("expect {0} or {1}, not {2}".format(
|
|
six.binary_type.__name__,
|
|
six.text_type.__name__,
|
|
type(value).__name__))
|
|
else:
|
|
fsdecode = os.fsdecode #pylint: disable=no-member
|
|
|
|
|
|
def is_fips_enabled():
|
|
"""
|
|
Checks whether this host is FIPS-enabled.
|
|
|
|
Returns a boolean indicating if the host is FIPS-enabled, i.e. if the
|
|
file /proc/sys/crypto/fips_enabled contains a non-0 value. Otherwise,
|
|
or if the file /proc/sys/crypto/fips_enabled does not exist,
|
|
the function returns False.
|
|
"""
|
|
try:
|
|
with open(paths.PROC_FIPS_ENABLED, 'r') as f:
|
|
if f.read().strip() != '0':
|
|
return True
|
|
except IOError:
|
|
# Consider that the host is not fips-enabled if the file does not exist
|
|
pass
|
|
return False
|
|
|
|
|
|
def unescape_seq(seq, *args):
|
|
"""
|
|
unescape (remove '\\') all occurences of sequence in input strings.
|
|
|
|
:param seq: sequence to unescape
|
|
:param args: input string to process
|
|
|
|
:returns: tuple of strings with unescaped sequences
|
|
"""
|
|
unescape_re = re.compile(r'\\{}'.format(seq))
|
|
|
|
return tuple(re.sub(unescape_re, seq, a) for a in args)
|
|
|
|
|
|
def escape_seq(seq, *args):
|
|
"""
|
|
escape (prepend '\\') all occurences of sequence in input strings
|
|
|
|
:param seq: sequence to escape
|
|
:param args: input string to process
|
|
|
|
:returns: tuple of strings with escaped sequences
|
|
"""
|
|
|
|
return tuple(a.replace(seq, u'\\{}'.format(seq)) for a in args)
|