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373 lines
14 KiB
Python
Executable File
373 lines
14 KiB
Python
Executable File
#! /usr/bin/python
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#
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# Authors: Sumit Bose <sbose@redhat.com>
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# Based on ipa-server-install by Karl MacMillan <kmacmillan@mentalrootkit.com>
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# and ipa-dns-install by Martin Nagy
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#
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# Copyright (C) 2011 Red Hat
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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 ipaserver.plugins.ldap2 import ldap2
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from ipaserver.install import adtrustinstance
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from ipaserver.install.installutils import *
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from ipaserver.install import service
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from ipapython import version
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from ipapython import ipautil, sysrestore
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from ipalib import api, errors, util
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from ipapython.config import IPAOptionParser
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import krbV
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import ldap
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from ipapython.ipa_log_manager import *
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from ipapython.dn import DN
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log_file_name = "/var/log/ipaserver-install.log"
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def parse_options():
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parser = IPAOptionParser(version=version.VERSION)
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parser.add_option("-d", "--debug", dest="debug", action="store_true",
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default=False, help="print debugging information")
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parser.add_option("--ip-address", dest="ip_address",
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type="ip", ip_local=True, help="Master Server IP Address")
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parser.add_option("--netbios-name", dest="netbios_name",
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help="NetBIOS name of the IPA domain")
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parser.add_option("--no-msdcs", dest="no_msdcs", action="store_true",
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default=False, help="Do not create DNS service records " \
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"for Windows in managed DNS server")
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parser.add_option("--rid-base", dest="rid_base", type=int, default=1000,
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help="Start value for mapping UIDs and GIDs to RIDs")
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parser.add_option("--secondary-rid-base", dest="secondary_rid_base",
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type=int, default=100000000,
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help="Start value of the secondary range for mapping " \
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"UIDs and GIDs to RIDs")
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parser.add_option("-U", "--unattended", dest="unattended", action="store_true",
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default=False, help="unattended installation never prompts the user")
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parser.add_option("-a", "--admin-password",
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sensitive=True, dest="admin_password",
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help="admin user kerberos password")
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parser.add_option("-A", "--admin-name",
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sensitive=True, dest="admin_name", default='admin',
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help="admin user principal")
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parser.add_option("--add-sids", dest="add_sids", action="store_true",
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default=False, help="Add SIDs for existing users and" \
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"groups as the final step")
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options, args = parser.parse_args()
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safe_options = parser.get_safe_opts(options)
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return safe_options, options
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def netbios_name_error(name):
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print "\nIllegal NetBIOS name [%s].\n" % name
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print "Up to 15 characters and only uppercase ASCII letter and digits are allowed."
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def read_netbios_name(netbios_default):
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netbios_name = ""
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print "Enter the NetBIOS name for the IPA domain."
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print "Only up to 15 uppercase ASCII letters and digits are allowed."
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print "Example: EXAMPLE."
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print ""
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print ""
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if not netbios_default:
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netbios_default = "EXAMPLE"
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while True:
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netbios_name = ipautil.user_input("NetBIOS domain name", netbios_default, allow_empty = False)
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print ""
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if adtrustinstance.check_netbios_name(netbios_name):
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break
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netbios_name_error(netbios_name)
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return netbios_name
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def read_admin_password(admin_name):
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print "Configuring cross-realm trusts for IPA server requires password for user '%s'." % (admin_name)
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print "This user is a regular system account used for IPA server administration."
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print ""
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admin_password = read_password(admin_name, confirm=False, validate=None)
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return admin_password
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def set_and_check_netbios_name(netbios_name, unattended):
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"""
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Depending if trust in already configured or not a given NetBIOS domain
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name must be handled differently.
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If trust is not configured the given NetBIOS is used or the NetBIOS is
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generated if none was given on the command line.
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If trust is already configured the given NetBIOS name is used to reset
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the stored NetBIOS name it it differs from the current one.
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"""
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flat_name_attr = 'ipantflatname'
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cur_netbios_name = None
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gen_netbios_name = None
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reset_netbios_name = False
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dom_dn = None
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try:
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(dom_dn, entry) = api.Backend.ldap2.get_entry(DN(('cn', api.env.domain),
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api.env.container_cifsdomains,
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ipautil.realm_to_suffix(api.env.realm)),
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[flat_name_attr])
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except errors.NotFound:
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# trust not configured
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pass
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else:
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cur_netbios_name = entry.get(flat_name_attr)[0]
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if cur_netbios_name and not netbios_name:
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# keep the current NetBIOS name
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netbios_name = cur_netbios_name
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reset_netbios_name = False
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elif cur_netbios_name and cur_netbios_name != netbios_name:
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# change the NetBIOS name
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print "Current NetBIOS domain name is %s, new name is %s.\n" % \
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(cur_netbios_name, netbios_name)
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print "Please note that changing the NetBIOS name might " \
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"break existing trust relationships."
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if unattended:
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reset_netbios_name = True
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print "NetBIOS domain name will be changed to %s.\n" % \
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netbios_name
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else:
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print "Say 'yes' if the NetBIOS shall be changed and " \
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"'no' if the old one shall be kept."
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reset_netbios_name = ipautil.user_input(
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'Do you want to reset the NetBIOS domain name?',
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default = False, allow_empty = False)
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if not reset_netbios_name:
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netbios_name = cur_netbios_name
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elif cur_netbios_name and cur_netbios_name == netbios_name:
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# keep the current NetBIOS name
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reset_netbios_name = False
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elif not cur_netbios_name:
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if not netbios_name:
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gen_netbios_name = adtrustinstance.make_netbios_name(api.env.domain)
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if dom_dn:
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# Fix existing trust configuration
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print "Trust is configured but no NetBIOS domain name found, " \
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"setting it now."
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reset_netbios_name = True
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else:
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# initial trust configuration
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reset_netbios_name = False
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else:
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# all possible cases should be covered above
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raise Exception('Unexpected state while checking NetBIOS domain name')
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if not adtrustinstance.check_netbios_name(netbios_name):
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if unattended:
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netbios_name_error(netbios_name)
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sys.exit("Aborting installation.")
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else:
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if netbios_name:
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netbios_name_error(netbios_name)
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netbios_name = None
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if not unattended and not netbios_name:
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netbios_name = read_netbios_name(gen_netbios_name)
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return (netbios_name, reset_netbios_name)
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def ensure_admin_kinit(admin_name, admin_password):
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try:
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ipautil.run(['kinit', admin_name], stdin=admin_password+'\n')
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except ipautil.CalledProcessError, e:
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print "There was error to automatically re-kinit your admin user ticket."
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return False
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return True
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def main():
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safe_options, options = parse_options()
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if os.getegid() != 0:
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sys.exit("Must be root to setup AD trusts on server")
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standard_logging_setup(log_file_name, debug=options.debug, filemode='a')
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print "\nThe log file for this installation can be found in %s" % log_file_name
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root_logger.debug('%s was invoked with options: %s' % (sys.argv[0], safe_options))
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root_logger.debug("missing options might be asked for interactively later\n")
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check_server_configuration()
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global fstore
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fstore = sysrestore.FileStore('/var/lib/ipa/sysrestore')
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print "=============================================================================="
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print "This program will setup components needed to establish trust to AD domains for"
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print "the FreeIPA Server."
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print ""
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print "This includes:"
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print " * Configure Samba"
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print " * Add trust related objects to FreeIPA LDAP server"
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#TODO:
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#print " * Add a SID to all users and Posix groups"
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print ""
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print "To accept the default shown in brackets, press the Enter key."
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print ""
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# Check if samba packages are installed
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if not adtrustinstance.check_inst():
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sys.exit("Aborting installation.")
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# Initialize the ipalib api
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cfg = dict(
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in_server=True,
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debug=options.debug,
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)
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api.bootstrap(**cfg)
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api.finalize()
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if adtrustinstance.ipa_smb_conf_exists():
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if not options.unattended:
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while True:
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print "IPA generated smb.conf detected."
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if not ipautil.user_input("Overwrite smb.conf?", default = False, allow_empty = False):
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sys.exit("Aborting installation.")
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break
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# Check we have a public IP that is associated with the hostname
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ip = None
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try:
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hostaddr = resolve_host(api.env.host)
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if len(hostaddr) > 1:
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print >> sys.stderr, "The server hostname resolves to more than one address:"
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for addr in hostaddr:
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print >> sys.stderr, " %s" % addr
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if options.ip_address:
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if str(options.ip_address) not in hostaddr:
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print >> sys.stderr, "Address passed in --ip-address did not match any resolved"
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print >> sys.stderr, "address!"
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sys.exit(1)
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print "Selected IP address:", str(options.ip_address)
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ip = options.ip_address
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else:
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if options.unattended:
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print >> sys.stderr, "Please use --ip-address option to specify the address"
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sys.exit(1)
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else:
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ip = read_ip_address(api.env.host, fstore)
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else:
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ip = hostaddr and ipautil.CheckedIPAddress(hostaddr[0], match_local=True)
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except Exception, e:
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print "Error: Invalid IP Address %s: %s" % (ip, e)
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print "Aborting installation"
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sys.exit(1)
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ip_address = str(ip)
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root_logger.debug("will use ip_address: %s\n", ip_address)
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if not options.unattended:
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print ""
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print "The following operations may take some minutes to complete."
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print "Please wait until the prompt is returned."
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print ""
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admin_password = options.admin_password
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if not (options.unattended or admin_password):
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admin_password = read_admin_password(options.admin_name)
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admin_kinited = None
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if admin_password:
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admin_kinited = ensure_admin_kinit(options.admin_name, admin_password)
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if not admin_kinited:
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print "Proceeding with credentials that existed before"
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try:
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ctx = krbV.default_context()
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ccache = ctx.default_ccache()
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principal = ccache.principal()
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except krbV.Krb5Error, e:
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sys.exit("Must have Kerberos credentials to setup AD trusts on server")
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try:
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api.Backend.ldap2.connect(ccache.name)
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except errors.ACIError, e:
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sys.exit("Outdated Kerberos credentials. Use kdestroy and kinit to update your ticket")
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except errors.DatabaseError, e:
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sys.exit("Cannot connect to the LDAP database. Please check if IPA is running")
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try:
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user = api.Command.user_show(unicode(principal[0]))['result']
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group = api.Command.group_show(u'admins')['result']
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if not (user['uid'][0] in group['member_user'] and
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group['cn'][0] in user['memberof_group']):
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raise errors.RequirementError(name='admins group membership')
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except errors.RequirementError, e:
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sys.exit("Must have administrative privileges to setup AD trusts on server")
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except Exception, e:
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sys.exit("Unrecognized error during check of admin rights: %s" % (str(e)))
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(netbios_name, reset_netbios_name) = \
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set_and_check_netbios_name(options.netbios_name,
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options.unattended)
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smb = adtrustinstance.ADTRUSTInstance(fstore)
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smb.realm = api.env.realm
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smb.autobind = service.ENABLED
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smb.setup(api.env.host, ip_address, api.env.realm, api.env.domain,
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netbios_name, reset_netbios_name,
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options.rid_base, options.secondary_rid_base,
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options.no_msdcs, options.add_sids)
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smb.find_local_id_range()
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smb.create_instance()
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print """
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=============================================================================
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Setup complete
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You must make sure these network ports are open:
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\tTCP Ports:
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\t * 138: netbios-dgm
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\t * 139: netbios-ssn
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\t * 445: microsoft-ds
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\tUDP Ports:
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\t * 138: netbios-dgm
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\t * 139: netbios-ssn
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\t * 389: (C)LDAP
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\t * 445: microsoft-ds
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Additionally you have to make sure the FreeIPA LDAP server is not reachable
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by any domain controller in the Active Directory domain by closing down
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the following ports for these servers:
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\tTCP Ports:
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\t * 389, 636: LDAP/LDAPS
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You may want to choose to REJECT the network packets instead of DROPing
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them to avoid timeouts on the AD domain controllers.
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=============================================================================
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"""
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if admin_password:
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admin_kinited = ensure_admin_kinit(options.admin_name, admin_password)
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if not admin_kinited:
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print """
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WARNING: you MUST re-kinit admin user before using 'ipa trust-*' commands
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family in order to re-generate Kerberos tickets to include AD-specific
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information"""
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return 0
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if __name__ == '__main__':
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run_script(main, log_file_name=log_file_name,
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operation_name='ipa-adtrust-install')
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