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