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# Authors: Karl MacMillan <kmacmill@redhat.com>
#
# Copyright (C) 2007 Red Hat
# see file 'COPYING' for use and warranty information
#
# 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 ConfigParser
from optparse import Option, Values, OptionParser, IndentedHelpFormatter, OptionValueError
from copy import copy
import socket
import ipapython.dnsclient
import re
import urlparse
class IPAConfigError(Exception):
def __init__(self, msg=''):
self.msg = msg
Exception.__init__(self, msg)
def __repr__(self):
return self.msg
__str__ = __repr__
class IPAFormatter(IndentedHelpFormatter):
"""Our own optparse formatter that indents multiple lined usage string."""
def format_usage(self, usage):
usage_string = "Usage:"
spacing = " " * len(usage_string)
lines = usage.split("\n")
ret = "%s %s\n" % (usage_string, lines[0])
for line in lines[1:]:
ret += "%s %s\n" % (spacing, line)
return ret
def check_ip_option(option, opt, value):
from ipapython.ipautil import CheckedIPAddress
ip_local = option.ip_local is True
ip_netmask = option.ip_netmask is True
try:
return CheckedIPAddress(value, parse_netmask=ip_netmask, match_local=ip_local)
except Exception as e:
raise OptionValueError("option %s: invalid IP address %s: %s" % (opt, value, e))
class IPAOption(Option):
"""
optparse.Option subclass with support of options labeled as
security-sensitive such as passwords.
"""
ATTRS = Option.ATTRS + ["sensitive", "ip_local", "ip_netmask"]
TYPES = Option.TYPES + ("ip",)
TYPE_CHECKER = copy(Option.TYPE_CHECKER)
TYPE_CHECKER["ip"] = check_ip_option
class IPAOptionParser(OptionParser):
"""
optparse.OptionParser subclass that uses IPAOption by default
for storing options.
"""
def __init__(self,
usage=None,
option_list=None,
option_class=IPAOption,
version=None,
conflict_handler="error",
description=None,
formatter=None,
add_help_option=True,
prog=None):
OptionParser.__init__(self, usage, option_list, option_class,
version, conflict_handler, description,
formatter, add_help_option, prog)
def get_safe_opts(self, opts):
"""
Returns all options except those with sensitive=True in the same
fashion as parse_args would
"""
all_opts_dict = dict([ (o.dest, o) for o in self._get_all_options() if hasattr(o, 'sensitive') ])
safe_opts_dict = {}
for option, value in opts.__dict__.iteritems():
if all_opts_dict[option].sensitive != True:
safe_opts_dict[option] = value
return Values(safe_opts_dict)
def verify_args(parser, args, needed_args = None):
"""Verify that we have all positional arguments we need, if not, exit."""
if needed_args:
needed_list = needed_args.split(" ")
else:
needed_list = []
len_need = len(needed_list)
len_have = len(args)
if len_have > len_need:
parser.error("too many arguments")
elif len_have < len_need:
parser.error("no %s specified" % needed_list[len_have])
class IPAConfig:
def __init__(self):
self.default_realm = None
self.default_server = []
self.default_domain = None
def get_realm(self):
if self.default_realm:
return self.default_realm
else:
raise IPAConfigError("no default realm")
def get_server(self):
if len(self.default_server):
return self.default_server
else:
raise IPAConfigError("no default server")
def get_domain(self):
if self.default_domain:
return self.default_domain
else:
raise IPAConfigError("no default domain")
# Global library config
config = IPAConfig()
def __parse_config(discover_server = True):
p = ConfigParser.SafeConfigParser()
p.read("/etc/ipa/default.conf")
try:
if not config.default_realm:
config.default_realm = p.get("global", "realm")
except:
pass
if discover_server:
try:
s = p.get("global", "xmlrpc_uri")
server = urlparse.urlsplit(s)
config.default_server.extend(server.netloc)
except:
pass
try:
if not config.default_domain:
config.default_domain = p.get("global", "domain")
except:
pass
def __discover_config(discover_server = True):
rl = 0
try:
if not config.default_realm:
try:
# only import krbV when we need it
import krbV
krbctx = krbV.default_context()
config.default_realm = krbctx.default_realm
except ImportError:
pass
if not config.default_realm:
return False
if not config.default_domain:
#try once with REALM -> domain
dom_name = str(config.default_realm).lower()
name = "_ldap._tcp."+dom_name+"."
rs = ipapython.dnsclient.query(name, ipapython.dnsclient.DNS_C_IN, ipapython.dnsclient.DNS_T_SRV)
rl = len(rs)
if rl == 0:
#try cycling on domain components of FQDN
dom_name = socket.getfqdn()
while rl == 0:
tok = dom_name.find(".")
if tok == -1:
return False
dom_name = dom_name[tok+1:]
name = "_ldap._tcp." + dom_name + "."
rs = ipapython.dnsclient.query(name, ipapython.dnsclient.DNS_C_IN, ipapython.dnsclient.DNS_T_SRV)
rl = len(rs)
config.default_domain = dom_name
if discover_server:
if rl == 0:
name = "_ldap._tcp."+config.default_domain+"."
rs = ipapython.dnsclient.query(name, ipapython.dnsclient.DNS_C_IN, ipapython.dnsclient.DNS_T_SRV)
for r in rs:
if r.dns_type == ipapython.dnsclient.DNS_T_SRV:
rsrv = r.rdata.server.rstrip(".")
config.default_server.append(rsrv)
except:
pass
def add_standard_options(parser):
parser.add_option("--realm", dest="realm", help="Override default IPA realm")
parser.add_option("--server", dest="server", help="Override default IPA server")
parser.add_option("--domain", dest="domain", help="Override default IPA DNS domain")
def init_config(options=None):
if options:
config.default_realm = options.realm
config.default_domain = options.domain
if options.server:
config.default_server.extend(options.server.split(","))
if len(config.default_server):
discover_server = False
else:
discover_server = True
__parse_config(discover_server)
__discover_config(discover_server)
# make sure the server list only contains unique items
new_server = []
for server in config.default_server:
if server not in new_server:
new_server.append(server)
config.default_server = new_server
if not config.default_realm:
raise IPAConfigError("IPA realm not found in DNS, in the config file (/etc/ipa/default.conf) or on the command line.")
if not config.default_server:
raise IPAConfigError("IPA server not found in DNS, in the config file (/etc/ipa/default.conf) or on the command line.")
if not config.default_domain:
raise IPAConfigError("IPA domain not found in the config file (/etc/ipa/default.conf) or on the command line.")
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