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# -*- coding: utf-8 -*-
# Copyright 2010-2012 Kolab Systems AG (http://www.kolabsys.com)
#
# Jeroen van Meeuwen (Kolab Systems) <vanmeeuwen a kolabsys.com>
#
# 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; version 3 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 Library General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
#

import ldap
import ldap.modlist
import os
import shutil
import subprocess
import tempfile

import components

import pykolab

from pykolab import utils
from pykolab.auth import Auth
from pykolab.constants import *
from pykolab.translate import _

log = pykolab.getLogger('pykolab.setup')
conf = pykolab.getConf()

def __init__():
    components.register('ldap', execute, description=description())

def cli_options():
    ldap_group = conf.add_cli_parser_option_group(_("LDAP Options"))

    ldap_group.add_option(
            "--fqdn",
            dest    = "fqdn",
            action  = "store",
            default = fqdn,
            help    = _("Specify FQDN (overriding defaults).")
        )

def description():
    return _("Setup LDAP.")

def execute(*args, **kw):
    ask_questions = True

    if not conf.config_file == conf.defaults.config_file:
        ask_questions = False

    _input = {}

    if ask_questions:
        _input['admin_pass'] = utils.ask_question(
                _("Administrator password"),
                default=utils.generate_password(),
                password=True
            )

        _input['dirmgr_pass'] = utils.ask_question(
                _("Directory Manager password"),
                default=utils.generate_password(),
                password=True
            )

        _input['userid'] = utils.ask_question(_("User"), default="nobody")
        _input['group'] = utils.ask_question(_("Group"), default="nobody")

    else:
        _input['admin_pass'] = conf.get('ldap', 'bind_pw')
        _input['dirmgr_pass'] = conf.get('ldap', 'bind_pw')
        _input['userid'] = "nobody"
        _input['group'] = "nobody"

    # TODO: This takes the system fqdn, domainname and hostname, rather then
    # the desired fqdn, domainname and hostname.
    #
    # TODO^2: This should be confirmed.

    if conf.fqdn:
        _input['fqdn'] = conf.fqdn
        _input['hostname'] = conf.fqdn.split('.')[0]
        _input['domain'] = '.'.join(conf.fqdn.split('.')[1:])
    else:
        _input['fqdn'] = fqdn
        _input['hostname'] = hostname.split('.')[0]
        _input['domain'] = domainname

    _input['nodotdomain'] = _input['domain'].replace('.','_')

    _input['rootdn'] = utils.standard_root_dn(_input['domain'])

    data = """
[General]
FullMachineName = %(fqdn)s
SuiteSpotUserID = %(userid)s
SuiteSpotGroup = %(group)s
AdminDomain = %(domain)s
ConfigDirectoryLdapURL = ldap://%(fqdn)s:389/o=NetscapeRoot
ConfigDirectoryAdminID = admin
ConfigDirectoryAdminPwd = %(admin_pass)s

[slapd]
SlapdConfigForMC = Yes
UseExistingMC = 0
ServerPort = 389
ServerIdentifier = %(hostname)s
Suffix = %(rootdn)s
RootDN = cn=Directory Manager
RootDNPwd = %(dirmgr_pass)s
ds_bename = %(nodotdomain)s
AddSampleEntries = No

[admin]
Port = 9830
ServerAdminID = admin
ServerAdminPwd = %(admin_pass)s
""" % (_input)

    (fp, filename) = tempfile.mkstemp(dir="/tmp/")
    os.write(fp, data)
    os.close(fp)

    command = [
            '/usr/sbin/setup-ds-admin.pl',
            '--debug',
            '--silent',
            '--force',
            '--file=%s' % (filename)
        ]

    log.info(_("Setting up 389 Directory Server"))

    setup_389 = subprocess.Popen(
            command,
            stdout=subprocess.PIPE,
            stderr=subprocess.PIPE
        )

    (stdoutdata, stderrdata) = setup_389.communicate()

    log.debug(_("Setup DS stdout:"), level=8)
    log.debug(stdoutdata, level=8)

    log.debug(_("Setup DS stderr:"), level=8)
    log.debug(stderrdata, level=8)

    # Find the kolab schema. It's installed as %doc in the kolab-schema package.
    # TODO: Chown nobody, nobody, chmod 440
    schema_file = None
    for root, directories, filenames in os.walk('/usr/share/doc/'):
        for filename in filenames:
            if filename == 'kolab2.ldif':
                schema_file = os.path.join(root,filename)

    if not schema_file == None:
        shutil.copy(
                schema_file,
                '/etc/dirsrv/slapd-%s/schema/99kolab2.ldif' % (
                        _input['hostname']
                    )
            )
    else:
        log.warning(_("Could not find the Kolab schema file"))

    if os.path.isfile('/bin/systemctl'):
        subprocess.call(['/bin/systemctl', 'restart', 'dirsrv.target'])
        subprocess.call(['/bin/systemctl', 'enable', 'dirsrv.target'])
    elif os.path.isfile('/sbin/service'):
        subprocess.call(['/sbin/service', 'dirsrv', 'restart'])
        subprocess.call(['/sbin/chkconfig', 'dirsrv', 'on'])
    else:
        log.error(_("Could not start and configure to start on boot, the " + \
                "directory server service."))

    if ask_questions:
        _input['cyrus_admin_pass'] = utils.ask_question(
                _("Cyrus Administrator password"),
                default=utils.generate_password(),
                password=True
            )

        _input['kolab_service_pass'] = utils.ask_question(
                _("Kolab Service password"),
                default=utils.generate_password(),
                password=True
            )

    else:
        _input['cyrus_admin_pass'] = conf.get('cyrus-imap', 'admin_password')
        _input['kolab_service_pass'] = conf.get('ldap', 'service_bind_pw')

    log.info(_("Writing out configuration to kolab.conf"))

    # Write out kolab configuration
    conf.command_set('kolab', 'primary_domain', _input['domain'])
    conf.command_set('ldap', 'base_dn', _input['rootdn'])
    conf.command_set('ldap', 'bind_dn', 'cn=Directory Manager')
    conf.command_set('ldap', 'bind_pw', _input['dirmgr_pass'])
    conf.command_set('ldap', 'service_bind_dn', 'uid=kolab-service,ou=Special Users,%s' % (_input['rootdn']))
    conf.command_set('ldap', 'service_bind_pw', _input['kolab_service_pass'])

    fp = open(conf.defaults.config_file, "w+")
    conf.cfg_parser.write(fp)
    fp.close()

    log.info(_("Inserting service users into LDAP."))

    # Insert service users
    auth = Auth(_input['domain'])
    auth.connect()
    auth._auth.connect()
    auth._auth._bind()

    dn = 'uid=%s,ou=Special Users,%s' % (conf.get('cyrus-imap', 'admin_login'), _input['rootdn'])

    # A dict to help build the "body" of the object
    attrs = {}
    attrs['objectclass'] = ['top','person','inetorgperson','organizationalperson']
    attrs['uid'] = conf.get('cyrus-imap', 'admin_login')
    attrs['givenname'] = "Cyrus"
    attrs['surname'] = "Administrator"
    attrs['cn'] = "Cyrus Administrator"
    attrs['userPassword'] = _input['cyrus_admin_pass']

    # Convert our dict to nice syntax for the add-function using modlist-module
    ldif = ldap.modlist.addModlist(attrs)

    # Do the actual synchronous add-operation to the ldapserver
    auth._auth.ldap.add_s(dn, ldif)

    conf.command_set('cyrus-imap', 'admin_password', _input['cyrus_admin_pass'])

    dn = 'uid=kolab-service,ou=Special Users,%s' % (_input['rootdn'])

    # A dict to help build the "body" of the object
    attrs = {}
    attrs['objectclass'] = ['top','person','inetorgperson','organizationalperson']
    attrs['uid'] = "kolab-service"
    attrs['givenname'] = "Kolab"
    attrs['surname'] = "Service"
    attrs['cn'] = "Kolab Service"
    attrs['userPassword'] = _input['kolab_service_pass']

    # Convert our dict to nice syntax for the add-function using modlist-module
    ldif = ldap.modlist.addModlist(attrs)

    # Do the actual synchronous add-operation to the ldapserver
    auth._auth.ldap.add_s(dn, ldif)

    log.info(_("Writing out cn=kolab,cn=config"))

    dn = 'cn=kolab,cn=config'

    # A dict to help build the "body" of the object
    attrs = {}
    attrs['objectclass'] = ['top','extensibleobject']
    attrs['cn'] = "kolab"

    # Convert our dict to nice syntax for the add-function using modlist-module
    ldif = ldap.modlist.addModlist(attrs)

    # Do the actual synchronous add-operation to the ldapserver
    auth._auth.ldap.add_s(dn, ldif)

    auth._auth.set_entry_attribute(
            dn,
            'aci',
            '(targetattr = "*") (version 3.0;acl "Kolab Services";allow (read,compare,search)(userdn = "ldap:///%s");)' % ('uid=kolab-service,ou=Special Users,%s' % (_input['rootdn']))
        )

    # TODO: Add kolab-admin role
    # TODO: Assign kolab-admin admin ACLs

    log.info(_("Adding domain %s to list of domains for this deployment") % (_input['domain']))
    dn = "associateddomain=%s,cn=kolab,cn=config" % (_input['domain'])
    attrs = {}
    attrs['objectclass'] = ['top','domainrelatedobject']
    attrs['associateddomain'] = '%s' % (_input['domain'])
    ldif = ldap.modlist.addModlist(attrs)
    auth._auth.ldap.add_s(dn, ldif)

    log.info(_("Disabling anonymous binds"))
    dn = "cn=config"
    modlist = []
    modlist.append((ldap.MOD_REPLACE, "nsslapd-allow-anonymous-access", "off"))
    auth._auth.ldap.modify_s(dn, modlist)

    # TODO: Ensure the uid attribute is unique
    # TODO^2: Consider renaming the general "attribute uniqueness to "uid attribute uniqueness"
    log.info(_("Enabling attribute uniqueness plugin"))
    dn = "cn=attribute uniqueness,cn=plugins,cn=config"
    modlist = []
    modlist.append((ldap.MOD_REPLACE, "nsslapd-pluginEnabled", "on"))
    auth._auth.ldap.modify_s(dn, modlist)

    log.info(_("Enabling referential integrity plugin"))
    dn = "cn=referential integrity postoperation,cn=plugins,cn=config"
    modlist = []
    modlist.append((ldap.MOD_REPLACE, "nsslapd-pluginEnabled", "on"))
    auth._auth.ldap.modify_s(dn, modlist)

    log.info(_("Enabling and configuring account policy plugin"))
    dn = "cn=Account Policy Plugin,cn=plugins,cn=config"
    modlist = []
    modlist.append((ldap.MOD_REPLACE, "nsslapd-pluginEnabled", "on"))
    modlist.append((ldap.MOD_ADD, "nsslapd-pluginarg0", "cn=config,cn=Account Policy Plugin,cn=plugins,cn=config"))
    auth._auth.ldap.modify_s(dn, modlist)

    dn = "cn=config,cn=Account Policy Plugin,cn=plugins,cn=config"
    modlist = []
    modlist.append((ldap.MOD_REPLACE, "alwaysrecordlogin", "yes"))
    modlist.append((ldap.MOD_ADD, "stateattrname", "lastLoginTime"))
    modlist.append((ldap.MOD_ADD, "altstateattrname", "createTimestamp"))
    auth._auth.ldap.modify_s(dn, modlist)

    # TODO: Add kolab-admin role
    log.info(_("Adding the kolab-admin role"))
    dn = "cn=kolab-admin,%s" % (_input['rootdn'])
    attrs = {}
    attrs['description'] = "Kolab Administrator"
    attrs['objectClass'] = ['top','ldapsubentry','nsroledefinition','nssimpleroledefinition','nsmanagedroledefinition']
    attrs['cn'] = "kolab-admin"
    ldif = ldap.modlist.addModlist(attrs)

    auth._auth.ldap.add_s(dn, ldif)

    # TODO: User writeable attributes on root_dn
    log.info(_("Setting access control to %s") % (_input['rootdn']))
    dn = _input['rootdn']
    aci = []
    aci.append('(targetattr = "homePhone || preferredDeliveryMethod || jpegPhoto || postalAddress || carLicense || userPassword || mobile || kolabAllowSMTPRecipient || displayName || kolabDelegate || description || labeledURI || homePostalAddress || postOfficeBox || registeredAddress || postalCode || photo || title || street || kolabInvitationPolicy || pager || o || l || initials || kolabAllowSMTPSender || telephoneNumber || preferredLanguage || facsimileTelephoneNumber") (version 3.0;acl "Enable self write for common attributes";allow (read,compare,search,write)(userdn = "ldap:///self");)')
    aci.append('(targetattr = "*") (version 3.0;acl "Directory Administrators Group";allow (all)(groupdn = "ldap:///cn=Directory Administrators,%(rootdn)s" or roledn = "ldap:///cn=kolab-admin,%(rootdn)s");)' % (_input))
    aci.append('(targetattr="*")(version 3.0; acl "Configuration Administrators Group"; allow (all) groupdn="ldap:///cn=Configuration Administrators,ou=Groups,ou=TopologyManagement,o=NetscapeRoot";)')
    aci.append('(targetattr="*")(version 3.0; acl "Configuration Administrator"; allow (all) userdn="ldap:///uid=admin,ou=Administrators,ou=TopologyManagement,o=NetscapeRoot";)')
    aci.append('(targetattr = "*")(version 3.0; acl "SIE Group"; allow (all) groupdn = "ldap:///cn=slapd-%(hostname)s,cn=389 Directory Server,cn=Server Group,cn=%(fqdn)s,ou=%(domain)s,o=NetscapeRoot";)' %(_input))
    aci.append('(targetattr = "*") (version 3.0;acl "Search Access";allow (read,compare,search)(userdn = "ldap:///all");)')
    modlist = []
    modlist.append((ldap.MOD_REPLACE, "aci", aci))
    auth._auth.ldap.modify_s(dn, modlist)

    if os.path.isfile('/bin/systemctl'):
        subprocess.call(['/bin/systemctl', 'enable', 'dirsrv-admin.service'])
    elif os.path.isfile('/sbin/service'):
        subprocess.call(['/sbin/chkconfig', 'dirsrv-admin', 'on'])
    else:
        log.error(_("Could not start and configure to start on boot, the " + \
                "directory server admin service."))