#!/usr/bin/python
#
# Copyright (C) Matthieu Patou <mat@matws.net> 2009
#
# Based on provision a Samba4 server by
# Copyright (C) Jelmer Vernooij <jelmer@samba.org> 2007-2008
# Copyright (C) Andrew Bartlett <abartlet@samba.org> 2008
#
#
# 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 getopt
import shutil
import optparse
import os
import sys
import random
import string
import re
import base64
import tempfile
# Find right directory when running from source tree
sys.path.insert(0, "bin/python")

from base64 import b64encode

import samba
from samba.credentials import DONT_USE_KERBEROS
from samba.auth import system_session, admin_session
from samba import Ldb, DS_DOMAIN_FUNCTION_2000, DS_DOMAIN_FUNCTION_2003, DS_DOMAIN_FUNCTION_2008, DS_DC_FUNCTION_2008_R2
from ldb import SCOPE_SUBTREE, SCOPE_ONELEVEL, SCOPE_BASE, LdbError
import ldb
import samba.getopt as options
from samba.samdb import SamDB
from samba import param
from samba import glue
from samba.provision import  ProvisionNames,provision_paths_from_lp,find_setup_dir,FILL_FULL,provision, get_domain_descriptor, get_config_descriptor, secretsdb_self_join
from samba.provisionexceptions import ProvisioningError
from samba.schema import get_dnsyntax_attributes, get_linked_attributes, Schema, get_schema_descriptor
from samba.dcerpc import misc, security
from samba.ndr import ndr_pack, ndr_unpack
from samba.dcerpc.misc import SEC_CHAN_BDC

replace=2^ldb.FLAG_MOD_REPLACE
add=2^ldb.FLAG_MOD_ADD
delete=2^ldb.FLAG_MOD_DELETE

#Errors are always logged
ERROR = 	-1
SIMPLE = 	0x00
CHANGE = 	0x01
CHANGESD = 	0x02
GUESS = 	0x04
PROVISION =	0x08
CHANGEALL =	0xff

# Attributes that are never copied from the reference provision (even if they
# do not exist in the destination object).
# This is most probably because they are populated automatcally when object is
# created
hashAttrNotCopied = { 	"dn": 1,"whenCreated": 1,"whenChanged": 1,"objectGUID": 1,"replPropertyMetaData": 1,"uSNChanged": 1,\
						"uSNCreated": 1,"parentGUID": 1,"objectCategory": 1,"distinguishedName": 1,\
						"showInAdvancedViewOnly": 1,"instanceType": 1, "cn": 1, "msDS-Behavior-Version":1, "nextRid":1,\
						"nTMixedDomain": 1,"versionNumber":1, "lmPwdHistory":1, "pwdLastSet": 1, "ntPwdHistory":1, "unicodePwd":1,\
						"dBCSPwd":1,"supplementalCredentials":1,"gPCUserExtensionNames":1, "gPCMachineExtensionNames":1,\
						"maxPwdAge":1, "mail":1, "secret":1,"possibleInferiors":1, "sAMAccountType":1}

# Usually for an object that already exists we do not overwrite attributes as
# they might have been changed for good reasons. Anyway for a few of them it's
# mandatory to replace them otherwise the provision will be broken somehow.
hashOverwrittenAtt = {	"prefixMap": replace, "systemMayContain": replace,"systemOnly":replace, "searchFlags":replace,\
			"mayContain":replace,  "systemFlags":replace,"description":replace,
			"oEMInformation":replace, "operatingSystemVersion":replace, "adminPropertyPages":replace,
			"defaultSecurityDescriptor": replace,"wellKnownObjects":replace,"privilege":delete}
backlinked = []

def define_what_to_log(opts):
	what = 0
	if opts.debugchange:
		what = what | CHANGE
	if opts.debugchangesd:
		what = what | CHANGESD
	if opts.debugguess:
		what = what | GUESS
	if opts.debugprovision:
		what = what | PROVISION
	if opts.debugall:
		what = what | CHANGEALL
	return what


parser = optparse.OptionParser("provision [options]")
sambaopts = options.SambaOptions(parser)
parser.add_option_group(sambaopts)
parser.add_option_group(options.VersionOptions(parser))
credopts = options.CredentialsOptions(parser)
parser.add_option_group(credopts)
parser.add_option("--setupdir", type="string", metavar="DIR",
					help="directory with setup files")
parser.add_option("--debugprovision", help="Debug provision", action="store_true")
parser.add_option("--debugguess", help="Print information on what is different but won't be changed", action="store_true")
parser.add_option("--debugchange", help="Print information on what is different but won't be changed", action="store_true")
parser.add_option("--debugchangesd", help="Print information security descriptors differences", action="store_true")
parser.add_option("--debugall", help="Print all available information (very verbose)", action="store_true")
parser.add_option("--full", help="Perform full upgrade of the samdb (schema, configuration, new objects, ...", action="store_true")

opts = parser.parse_args()[0]

whatToLog = define_what_to_log(opts)

def messageprovision(text):
	"""print a message if quiet is not set."""
	if opts.debugprovision or opts.debugall:
		print text

def message(what,text):
	"""print a message if quiet is not set."""
	if (whatToLog & what) or (what <= 0 ):
		print text

if len(sys.argv) == 1:
	opts.interactive = True
lp = sambaopts.get_loadparm()
smbconf = lp.configfile

creds = credopts.get_credentials(lp)
creds.set_kerberos_state(DONT_USE_KERBEROS)
setup_dir = opts.setupdir
if setup_dir is None:
    setup_dir = find_setup_dir()

session = system_session()

# simple helper to allow back and forth rename
def identic_rename(ldbobj,dn):
	(before,sep,after)=str(dn).partition('=')
	ldbobj.rename(dn,ldb.Dn(ldbobj,"%s=foo%s"%(before,after)))
	ldbobj.rename(ldb.Dn(ldbobj,"%s=foo%s"%(before,after)),dn)

# Create an array of backlinked attributes
def populate_backlink(newpaths,creds,session,schemadn):
	newsam_ldb = Ldb(newpaths.samdb, session_info=session, credentials=creds,lp=lp)
	backlinked.extend(get_linked_attributes(ldb.Dn(newsam_ldb,str(schemadn)),newsam_ldb).values())

# Get Paths for important objects (ldb, keytabs ...)
def get_paths(targetdir=None,smbconf=None):
	if targetdir is not None:
		if (not os.path.exists(os.path.join(targetdir, "etc"))):
			os.makedirs(os.path.join(targetdir, "etc"))
		smbconf = os.path.join(targetdir, "etc", "smb.conf")
	if smbconf is None:
			smbconf = param.default_path()

	if not os.path.exists(smbconf):
		message(ERROR,"Unable to find smb.conf ..")
		parser.print_usage()
		sys.exit(1)

	lp = param.LoadParm()
	lp.load(smbconf)
# Normally we need the domain name for this function but for our needs it's
# pointless
	paths = provision_paths_from_lp(lp,"foo")
	return paths

# This function guesses (fetches) informations needed to make a fresh provision
# from the current provision
# It includes: realm, workgroup, partitions, netbiosname, domain guid, ...
def guess_names_from_current_provision(credentials,session_info,paths):
	lp = param.LoadParm()
	lp.load(paths.smbconf)
	names = ProvisionNames()
	# NT domain, kerberos realm, root dn, domain dn, domain dns name
	names.domain = string.upper(lp.get("workgroup"))
	names.realm = lp.get("realm")
	basedn = "DC=" + names.realm.replace(".",",DC=")
	names.dnsdomain = names.realm
	names.realm = string.upper(names.realm)
	# netbiosname
	secrets_ldb = Ldb(paths.secrets, session_info=session_info, credentials=credentials,lp=lp, options=["modules:samba_secrets"])
	# Get the netbiosname first (could be obtained from smb.conf in theory)
	attrs = ["sAMAccountName"]
	res = secrets_ldb.search(expression="(flatname=%s)"%names.domain,base="CN=Primary Domains", scope=SCOPE_SUBTREE, attrs=attrs)
	names.netbiosname = str(res[0]["sAMAccountName"]).replace("$","")

	names.smbconf = smbconf
	# It's important here to let ldb load with the old module or it's quite
	# certain that the LDB won't load ...
	samdb = Ldb(paths.samdb, session_info=session_info,
		    credentials=credentials, lp=lp, options=["modules:samba_dsdb"])

	# That's a bit simplistic but it's ok as long as we have only 3
	# partitions
	attrs2 = ["defaultNamingContext", "schemaNamingContext","configurationNamingContext","rootDomainNamingContext"]
	current = samdb.search(expression="(objectClass=*)",base="", scope=SCOPE_BASE, attrs=attrs2)

	names.configdn = current[0]["configurationNamingContext"]
	configdn = str(names.configdn)
	names.schemadn = current[0]["schemaNamingContext"]
	if not (ldb.Dn(samdb, basedn) == (ldb.Dn(samdb, current[0]["defaultNamingContext"][0]))):
		raise ProvisioningError(("basedn in %s (%s) and from %s (%s) is not the same ..." % (paths.samdb, str(current[0]["defaultNamingContext"][0]), paths.smbconf, basedn)))

	names.domaindn=current[0]["defaultNamingContext"]
	names.rootdn=current[0]["rootDomainNamingContext"]
	# default site name
	attrs3 = ["cn"]
	res3= samdb.search(expression="(objectClass=*)",base="CN=Sites,"+configdn, scope=SCOPE_ONELEVEL, attrs=attrs3)
	names.sitename = str(res3[0]["cn"])

	# dns hostname and server dn
	attrs4 = ["dNSHostName"]
	res4= samdb.search(expression="(CN=%s)"%names.netbiosname,base="OU=Domain Controllers,"+basedn, \
						scope=SCOPE_ONELEVEL, attrs=attrs4)
	names.hostname = str(res4[0]["dNSHostName"]).replace("."+names.dnsdomain,"")

	server_res = samdb.search(expression="serverReference=%s"%res4[0].dn, attrs=[], base=configdn)
	names.serverdn = server_res[0].dn

	# invocation id/objectguid
	res5 = samdb.search(expression="(objectClass=*)",base="CN=NTDS Settings,%s" % str(names.serverdn), scope=SCOPE_BASE, attrs=["invocationID","objectGUID"])
	names.invocation = str(ndr_unpack( misc.GUID,res5[0]["invocationId"][0]))
	names.ntdsguid = str(ndr_unpack( misc.GUID,res5[0]["objectGUID"][0]))

	# domain guid/sid
	attrs6 = ["objectGUID", "objectSid","msDS-Behavior-Version" ]
	res6 = samdb.search(expression="(objectClass=*)",base=basedn, scope=SCOPE_BASE, attrs=attrs6)
	names.domainguid = str(ndr_unpack( misc.GUID,res6[0]["objectGUID"][0]))
	names.domainsid = ndr_unpack( security.dom_sid,res6[0]["objectSid"][0])
	if res6[0].get("msDS-Behavior-Version") == None or int(res6[0]["msDS-Behavior-Version"][0]) < DS_DOMAIN_FUNCTION_2000:
		names.domainlevel = DS_DOMAIN_FUNCTION_2000
	else:
		names.domainlevel = int(res6[0]["msDS-Behavior-Version"][0])

	# policy guid
	attrs7 = ["cn","displayName"]
	res7 = samdb.search(expression="(displayName=Default Domain Policy)",base="CN=Policies,CN=System,"+basedn, \
							scope=SCOPE_ONELEVEL, attrs=attrs7)
	names.policyid = str(res7[0]["cn"]).replace("{","").replace("}","")
	# dc policy guid
	attrs8 = ["cn","displayName"]
	res8 = samdb.search(expression="(displayName=Default Domain Controllers Policy)",base="CN=Policies,CN=System,"+basedn, \
							scope=SCOPE_ONELEVEL, attrs=attrs7)
	if len(res8) == 1:
		names.policyid_dc = str(res8[0]["cn"]).replace("{","").replace("}","")
	else:
		names.policyid_dc = None


	return names

# Debug a little bit
def print_names(names):
	message(GUESS, "rootdn      :"+str(names.rootdn))
	message(GUESS, "configdn    :"+str(names.configdn))
	message(GUESS, "schemadn    :"+str(names.schemadn))
	message(GUESS, "serverdn    :"+str(names.serverdn))
	message(GUESS, "netbiosname :"+names.netbiosname)
	message(GUESS, "defaultsite :"+names.sitename)
	message(GUESS, "dnsdomain   :"+names.dnsdomain)
	message(GUESS, "hostname    :"+names.hostname)
	message(GUESS, "domain      :"+names.domain)
	message(GUESS, "realm       :"+names.realm)
	message(GUESS, "invocationid:"+names.invocation)
	message(GUESS, "policyguid  :"+names.policyid)
	message(GUESS, "policyguiddc:"+str(names.policyid_dc))
	message(GUESS, "domainsid   :"+str(names.domainsid))
	message(GUESS, "domainguid  :"+names.domainguid)
	message(GUESS, "ntdsguid    :"+names.ntdsguid)
	message(GUESS, "domainlevel :"+str(names.domainlevel))

# Create a fresh new reference provision
# This provision will be the reference for knowing what has changed in the
# since the latest upgrade in the current provision
def newprovision(names,setup_dir,creds,session,smbconf):
	message(SIMPLE, "Creating a reference provision")
	provdir=tempfile.mkdtemp(dir=paths.private_dir, prefix="referenceprovision")
	if os.path.isdir(provdir):
		rmall(provdir)
	logstd=os.path.join(provdir,"log.std")
	os.chdir(os.path.join(setup_dir,".."))
	os.mkdir(provdir)
	os.close(2)
	sys.stderr = open("%s/provision.log"%provdir, "w")
	message(PROVISION, "Reference provision stored in %s"%provdir)
	message(PROVISION, "STDERR message of provision will be logged in %s/provision.log"%provdir)
	sys.stderr = open("/dev/stdout", "w")
	provision(setup_dir, messageprovision,
		session, creds, smbconf=smbconf, targetdir=provdir,
		samdb_fill=FILL_FULL, realm=names.realm, domain=names.domain,
		domainguid=names.domainguid, domainsid=str(names.domainsid),ntdsguid=names.ntdsguid,
		policyguid=names.policyid,policyguid_dc=names.policyid_dc,hostname=names.netbiosname,
		hostip=None, hostip6=None,
		invocationid=names.invocation, adminpass=None,
		krbtgtpass=None, machinepass=None,
		dnspass=None, root=None, nobody=None,
		wheel=None, users=None,
		serverrole="domain controller",
		ldap_backend_extra_port=None,
		backend_type=None,
		ldapadminpass=None,
		ol_mmr_urls=None,
		slapd_path=None,
		setup_ds_path=None,
		nosync=None,
		dom_for_fun_level=names.domainlevel,
		ldap_dryrun_mode=None)
	return provdir

# This function sorts two DNs in the lexicographical order and put higher level
# DN before.
# So given the dns cn=bar,cn=foo and cn=foo the later will be return as smaller
# (-1) as it has less level
def dn_sort(x,y):
	p = re.compile(r'(?<!\\),')
	tab1 = p.split(str(x))
	tab2 = p.split(str(y))
	min = 0
	if (len(tab1) > len(tab2)):
		min = len(tab2)
	elif (len(tab1) < len(tab2)):
		min = len(tab1)
	else:
		min = len(tab1)
	len1=len(tab1)-1
	len2=len(tab2)-1
	space = " "
	# Note: python range go up to upper limit but do not include it
	for i in range(0,min):
		ret=cmp(tab1[len1-i],tab2[len2-i])
		if(ret != 0):
			return ret
		else:
			if(i==min-1):
				if(len1==len2):
					message(ERROR,"PB PB PB"+space.join(tab1)+" / "+space.join(tab2))
				if(len1>len2):
					return 1
				else:
					return -1
	return ret

# Check for security descriptors modifications return 1 if it is and 0 otherwise
# it also populate hash structure for later use in the upgrade process
def handle_security_desc(ischema,att,msgElt,hashallSD,old,new):
	if ischema == 1 and att == "defaultSecurityDescriptor"  and msgElt.flags() == ldb.FLAG_MOD_REPLACE:
		hashSD = {}
		hashSD["oldSD"] = old[0][att]
		hashSD["newSD"] = new[0][att]
		hashallSD[str(old[0].dn)] = hashSD
		return 0
	if att == "nTSecurityDescriptor"  and msgElt.flags() == ldb.FLAG_MOD_REPLACE:
		if ischema == 0:
			hashSD = {}
			hashSD["oldSD"] =  ndr_unpack(security.descriptor,str(old[0][att]))
			hashSD["newSD"] =  ndr_unpack(security.descriptor,str(new[0][att]))
			hashallSD[str(old[0].dn)] = hashSD
		return 1
	return 0

# Handle special cases ... That's when we want to update a particular attribute
# only, e.g. if it has a certain value or if it's for a certain object or
# a class of object.
# It can be also if we want to do a merge of value instead of a simple replace
def handle_special_case(att,delta,new,old,ischema):
	flag = delta.get(att).flags()
	if (att == "gPLink" or att == "gPCFileSysPath") and flag ==  ldb.FLAG_MOD_REPLACE and str(new[0].dn).lower() == str(old[0].dn).lower():
		delta.remove(att)
		return 1
	if att == "forceLogoff":
		ref=0x8000000000000000
		oldval=int(old[0][att][0])
		newval=int(new[0][att][0])
		ref == old and ref == abs(new)
		return 1
	if (att == "adminDisplayName" or att == "adminDescription") and ischema:
		return 1
	if (str(old[0].dn) == "CN=Samba4-Local-Domain,%s"%(str(names.schemadn)) and att == "defaultObjectCategory" and flag  == ldb.FLAG_MOD_REPLACE):
		return 1
#	if (str(old[0].dn) == "CN=S-1-5-11,CN=ForeignSecurityPrincipals,%s"%(str(names.rootdn)) and att == "description" and flag  == ldb.FLAG_MOD_DELETE):
#		return 1
	if (str(old[0].dn) == "CN=Title,%s"%(str(names.schemadn)) and att == "rangeUpper" and flag  == ldb.FLAG_MOD_REPLACE):
		return 1
	if ( (att == "member" or att == "servicePrincipalName") and flag  == ldb.FLAG_MOD_REPLACE):

		hash = {}
		newval = []
		changeDelta=0
		for elem in old[0][att]:
			hash[str(elem)]=1
			newval.append(str(elem))

		for elem in new[0][att]:
			if not hash.has_key(str(elem)):
				changeDelta=1
				newval.append(str(elem))
		if changeDelta == 1:
			delta[att] = ldb.MessageElement(newval, ldb.FLAG_MOD_REPLACE, att)
		else:
			delta.remove(att)
		return 1
	if (str(old[0].dn) == "%s"%(str(names.rootdn)) and att == "subRefs" and flag  == ldb.FLAG_MOD_REPLACE):
		return 1
	if str(delta.dn).endswith("CN=DisplaySpecifiers,%s"%names.configdn):
		return 1
	return 0

def update_secrets(newpaths,paths,creds,session):
	message(SIMPLE,"update secrets.ldb")
	newsecrets_ldb = Ldb(newpaths.secrets, session_info=session, credentials=creds,lp=lp)
	secrets_ldb = Ldb(paths.secrets, session_info=session, credentials=creds,lp=lp, options=["modules:samba_secrets"])
	reference = newsecrets_ldb.search(expression="dn=@MODULES",base="", scope=SCOPE_SUBTREE)
	current = secrets_ldb.search(expression="dn=@MODULES",base="", scope=SCOPE_SUBTREE)
	delta = secrets_ldb.msg_diff(current[0],reference[0])
	delta.dn = current[0].dn
	secrets_ldb.modify(delta)

	newsecrets_ldb = Ldb(newpaths.secrets, session_info=session, credentials=creds,lp=lp)
	secrets_ldb = Ldb(paths.secrets, session_info=session, credentials=creds,lp=lp)
	reference = newsecrets_ldb.search(expression="objectClass=top",base="", scope=SCOPE_SUBTREE,attrs=["dn"])
	current = secrets_ldb.search(expression="objectClass=top",base="", scope=SCOPE_SUBTREE,attrs=["dn"])
	hash_new = {}
	hash = {}
	listMissing = []
	listPresent = []

	empty = ldb.Message()
	for i in range(0,len(reference)):
		hash_new[str(reference[i]["dn"]).lower()] = reference[i]["dn"]

	# Create a hash for speeding the search of existing object in the
	# current provision
	for i in range(0,len(current)):
		hash[str(current[i]["dn"]).lower()] = current[i]["dn"]

	for k in hash_new.keys():
		if not hash.has_key(k):
			listMissing.append(hash_new[k])
		else:
			listPresent.append(hash_new[k])
	for entry in listMissing:
		reference = newsecrets_ldb.search(expression="dn=%s"%entry,base="", scope=SCOPE_SUBTREE)
		current = secrets_ldb.search(expression="dn=%s"%entry,base="", scope=SCOPE_SUBTREE)
		delta = secrets_ldb.msg_diff(empty,reference[0])
		for att in hashAttrNotCopied.keys():
			delta.remove(att)
		message(CHANGE,"Entry %s is missing from secrets.ldb"%reference[0].dn)
		for att in delta:
			message(CHANGE," Adding attribute %s"%att)
		delta.dn = reference[0].dn
		secrets_ldb.add(delta)

	for entry in listPresent:
		reference = newsecrets_ldb.search(expression="dn=%s"%entry,base="", scope=SCOPE_SUBTREE)
		current = secrets_ldb.search(expression="dn=%s"%entry,base="", scope=SCOPE_SUBTREE)
		delta = secrets_ldb.msg_diff(current[0],reference[0])
		i=0
		for att in hashAttrNotCopied.keys():
			delta.remove(att)
		for att in delta:
			i = i + 1

			if att == "name":
				message(CHANGE,"Found attribute name on  %s, must rename the DN "%(current[0].dn))
				identic_rename(secrets_ldb,reference[0].dn)
			else:
				delta.remove(att)


	for entry in listPresent:
		reference = newsecrets_ldb.search(expression="dn=%s"%entry,base="", scope=SCOPE_SUBTREE)
		current = secrets_ldb.search(expression="dn=%s"%entry,base="", scope=SCOPE_SUBTREE)
		delta = secrets_ldb.msg_diff(current[0],reference[0])
		i=0
		for att in hashAttrNotCopied.keys():
			delta.remove(att)
		for att in delta:
			i = i + 1
			if att != "dn":
				message(CHANGE," Adding/Changing attribute %s to %s"%(att,current[0].dn))

		delta.dn = current[0].dn
		secrets_ldb.modify(delta)


# Check difference between the current provision and the reference provision.
# It looks for all objects which base DN is name. If ischema is "false" then
# the scan is done in cross partition mode.
# If "ischema" is true, then special handling is done for dealing with schema
def check_diff_name(newpaths,paths,creds,session,basedn,names,ischema):
	hash_new = {}
	hash = {}
	hashallSD = {}
	listMissing = []
	listPresent = []
	reference = []
	current = []
	# Connect to the reference provision and get all the attribute in the
	# partition referred by name
	newsam_ldb = Ldb(newpaths.samdb, session_info=session, credentials=creds,lp=lp)
	sam_ldb = Ldb(paths.samdb, session_info=session, credentials=creds,lp=lp, options=["modules:samba_dsdb"])
	sam_ldb.transaction_start()
	if ischema:
		reference = newsam_ldb.search(expression="objectClass=*",base=basedn, scope=SCOPE_SUBTREE,attrs=["dn"])
		current = sam_ldb.search(expression="objectClass=*",base=basedn, scope=SCOPE_SUBTREE,attrs=["dn"])
	else:
		reference = newsam_ldb.search(expression="objectClass=*",base=basedn, scope=SCOPE_SUBTREE,attrs=["dn"],controls=["search_options:1:2"])
		current = sam_ldb.search(expression="objectClass=*",base=basedn, scope=SCOPE_SUBTREE,attrs=["dn"],controls=["search_options:1:2"])

	sam_ldb.transaction_commit()
	# Create a hash for speeding the search of new object
	for i in range(0,len(reference)):
		hash_new[str(reference[i]["dn"]).lower()] = reference[i]["dn"]

	# Create a hash for speeding the search of existing object in the
	# current provision
	for i in range(0,len(current)):
		hash[str(current[i]["dn"]).lower()] = current[i]["dn"]

	for k in hash_new.keys():
		if not hash.has_key(k):
			listMissing.append(hash_new[k])
		else:
			listPresent.append(hash_new[k])

	# Sort the missing object in order to have object of the lowest level
	# first (which can be containers for higher level objects)
	listMissing.sort(dn_sort)
	listPresent.sort(dn_sort)

	if ischema:
		# The following lines (up to the for loop) is to load the up to
		# date schema into our current LDB
		# a complete schema is needed as the insertion of attributes
		# and class is done against it
		# and the schema is self validated
		# The double ldb open and schema validation is taken from the
		# initial provision script
		# it's not certain that it is really needed ....
		sam_ldb = Ldb(session_info=session, credentials=creds, lp=lp)
		schema = Schema(setup_path, names.domainsid, schemadn=basedn, serverdn=str(names.serverdn))
		# Load the schema from the one we computed earlier
		sam_ldb.set_schema_from_ldb(schema.ldb)
		# And now we can connect to the DB - the schema won't be loaded
		# from the DB
		sam_ldb.connect(paths.samdb)
	else:
		sam_ldb = Ldb(paths.samdb, session_info=session, credentials=creds,lp=lp, options=["modules:samba_dsdb"])

	sam_ldb.transaction_start()

	err_num = 0
	err_msg = ""
	while len(listMissing) > 0:
		listMissing2 = []

		empty = ldb.Message()
		message(SIMPLE,"There are still %d objects missing"%(len(listMissing)))

		for dn in listMissing:
			reference = newsam_ldb.search(expression="dn=%s" % (str(dn)),
						      base=basedn, scope=SCOPE_SUBTREE,
						      controls=["search_options:1:2"])
			delta = sam_ldb.msg_diff(empty,reference[0])
			for att in hashAttrNotCopied.keys():
				delta.remove(att)
			for att in backlinked:
				delta.remove(att)
			delta.dn = dn

			try:
				sam_ldb.add(delta,["relax:0"])
				# This is needed here since otherwise the
				# "replmd_meta_data" module doesn't see the
				# updated data
				sam_ldb.transaction_commit()
				sam_ldb.transaction_start()
			except LdbError, (num, msg):
				# An exception can happen if a linked object
				# doesn't exist which can happen if it is also
				# to be added
				err_num = num
				err_msg = msg
				listMissing2.append(dn)

		if len(listMissing2) == len(listMissing):
			# We couldn't add any object in this iteration ->
			# we have to resign and hope that the user manually
			# fixes the damage

			message(ERROR, "The script isn't capable to do the upgrade fully automatically!")
			message(ERROR, "Often this happens when important system objects moved their location. Please look for them (for example doable using the displayed 'sAMAccountName' attribute), backup if personally changed and remove them.")
			message(ERROR, "Reinvoke this script and reapply eventual modifications done before. It is possible to get this error more than once (for each problematic object).")

			raise LdbError(err_num, err_msg)

		listMissing = listMissing2

	changed = 0
	for dn in listPresent:
		reference = newsam_ldb.search(expression="dn=%s"%(str(dn)),base=basedn, scope=SCOPE_SUBTREE,controls=["search_options:1:2"])
		current = sam_ldb.search(expression="dn=%s"%(str(dn)),base=basedn, scope=SCOPE_SUBTREE,controls=["search_options:1:2"])
		if ((str(current[0].dn) != str(reference[0].dn)) and (str(current[0].dn).upper() == str(reference[0].dn).upper())):
			message(CHANGE,"Name are the same but case change, let's rename %s to %s"%(str(current[0].dn),str(reference[0].dn)))
			identic_rename(sam_ldb,reference[0].dn)
			current = sam_ldb.search(expression="dn=%s"%(str(dn)),base=basedn, scope=SCOPE_SUBTREE,controls=["search_options:1:2"])

		delta = sam_ldb.msg_diff(current[0],reference[0])
		for att in hashAttrNotCopied.keys():
			delta.remove(att)
		for att in backlinked:
			delta.remove(att)
		delta.remove("parentGUID")
		nb = 0
		
		for att in delta:
			msgElt = delta.get(att)
			if att == "dn":
				continue
			if att == "name":
				delta.remove(att)
				continue
			if handle_security_desc(ischema,att,msgElt,hashallSD,current,reference):
				delta.remove(att)
				continue
			if (not hashOverwrittenAtt.has_key(att) or not (hashOverwrittenAtt.get(att)&2^msgElt.flags())):
				if  handle_special_case(att,delta,reference,current,ischema)==0 and msgElt.flags()!=ldb.FLAG_MOD_ADD:
					i = 0
					if opts.debugchange:
						message(CHANGE, "dn= "+str(dn)+ " "+att + " with flag "+str(msgElt.flags())+ " is not allowed to be changed/removed, I discard this change ...")
						for e in range(0,len(current[0][att])):
							message(CHANGE,"old %d : %s"%(i,str(current[0][att][e])))
						if msgElt.flags() == 2:
							i = 0
							for e in range(0,len(reference[0][att])):
								message(CHANGE,"new %d : %s"%(i,str(reference[0][att][e])))
					delta.remove(att)
		delta.dn = dn
		if len(delta.items()) >1:
			attributes=",".join(delta.keys())
			message(CHANGE,"%s is different from the reference one, changed attributes: %s"%(dn,attributes))
			changed = changed + 1
			sam_ldb.modify(delta)

	sam_ldb.transaction_commit()
	message(SIMPLE,"There are %d changed objects"%(changed))
	return hashallSD

# Check that SD are correct
def check_updated_sd(newpaths,paths,creds,session,names):
	newsam_ldb = Ldb(newpaths.samdb, session_info=session, credentials=creds,lp=lp)
	sam_ldb = Ldb(paths.samdb, session_info=session, credentials=creds,lp=lp)
	reference = newsam_ldb.search(expression="objectClass=*",base=str(names.rootdn), scope=SCOPE_SUBTREE,attrs=["dn","nTSecurityDescriptor"],controls=["search_options:1:2"])
	current = sam_ldb.search(expression="objectClass=*",base=str(names.rootdn), scope=SCOPE_SUBTREE,attrs=["dn","nTSecurityDescriptor"],controls=["search_options:1:2"])
	hash_new = {}
	for i in range(0,len(reference)):
		hash_new[str(reference[i]["dn"]).lower()] = ndr_unpack(security.descriptor,str(reference[i]["nTSecurityDescriptor"])).as_sddl(names.domainsid)

	for i in range(0,len(current)):
		key = str(current[i]["dn"]).lower()
		if hash_new.has_key(key):
			sddl = ndr_unpack(security.descriptor,str(current[i]["nTSecurityDescriptor"])).as_sddl(names.domainsid)
			if sddl != hash_new[key]:
				print "%s new sddl/sddl in ref"%key
				print "%s\n%s"%(sddl,hash_new[key])

# Simple update method for updating the SD that rely on the fact that nobody
# should have modified the SD
# This assumption is safe right now (alpha9) but should be removed asap
def update_sd(paths,creds,session,names):
	sam_ldb = Ldb(paths.samdb, session_info=session, credentials=creds,lp=lp,options=["modules:samba_dsdb"])
	sam_ldb.transaction_start()
	# First update the SD for the rootdn
	sam_ldb.set_session_info(session)
	res = sam_ldb.search(expression="objectClass=*",base=str(names.rootdn), scope=SCOPE_BASE,attrs=["dn","whenCreated"],controls=["search_options:1:2"])
	delta = ldb.Message()
	delta.dn = ldb.Dn(sam_ldb,str(res[0]["dn"]))
	descr = get_domain_descriptor(names.domainsid)
	delta["nTSecurityDescriptor"] = ldb.MessageElement( descr,ldb.FLAG_MOD_REPLACE,"nTSecurityDescriptor" )
	sam_ldb.modify(delta,["recalculate_sd:0"])
	# Then the config dn
	res = sam_ldb.search(expression="objectClass=*",base=str(names.configdn), scope=SCOPE_BASE,attrs=["dn","whenCreated"],controls=["search_options:1:2"])
	delta = ldb.Message()
	delta.dn = ldb.Dn(sam_ldb,str(res[0]["dn"]))
	descr = get_config_descriptor(names.domainsid)
	delta["nTSecurityDescriptor"] = ldb.MessageElement( descr,ldb.FLAG_MOD_REPLACE,"nTSecurityDescriptor" )
	sam_ldb.modify(delta,["recalculate_sd:0"])
	# Then the schema dn
	res = sam_ldb.search(expression="objectClass=*",base=str(names.schemadn), scope=SCOPE_BASE,attrs=["dn","whenCreated"],controls=["search_options:1:2"])
	delta = ldb.Message()
	delta.dn = ldb.Dn(sam_ldb,str(res[0]["dn"]))
	descr = get_schema_descriptor(names.domainsid)
	delta["nTSecurityDescriptor"] = ldb.MessageElement( descr,ldb.FLAG_MOD_REPLACE,"nTSecurityDescriptor" )
	sam_ldb.modify(delta,["recalculate_sd:0"])

	# Then the rest
	hash = {}
	res = sam_ldb.search(expression="objectClass=*",base=str(names.rootdn), scope=SCOPE_SUBTREE,attrs=["dn","whenCreated"],controls=["search_options:1:2"])
	for obj in res:
		if not (str(obj["dn"]) == str(names.rootdn) or
			str(obj["dn"]) == str(names.configdn) or \
			str(obj["dn"]) == str(names.schemadn)):
			hash[str(obj["dn"])] = obj["whenCreated"]

	listkeys = hash.keys()
	listkeys.sort(dn_sort)

	for key in listkeys:
		try:
			delta = ldb.Message()
			delta.dn = ldb.Dn(sam_ldb,key)
			delta["whenCreated"] = ldb.MessageElement( hash[key],ldb.FLAG_MOD_REPLACE,"whenCreated" )
			sam_ldb.modify(delta,["recalculate_sd:0"])
		except:
			sam_ldb.transaction_cancel()
			res = sam_ldb.search(expression="objectClass=*",base=str(names.rootdn), scope=SCOPE_SUBTREE,attrs=["dn","nTSecurityDescriptor"],controls=["search_options:1:2"])
			print "bad stuff" +ndr_unpack(security.descriptor,str(res[0]["nTSecurityDescriptor"])).as_sddl(names.domainsid)
			return
	sam_ldb.transaction_commit()

def rmall(topdir):
	for root, dirs, files in os.walk(topdir, topdown=False):
		for name in files:
			os.remove(os.path.join(root, name))
		for name in dirs:
			os.rmdir(os.path.join(root, name))
	os.rmdir(topdir)


def update_basesamdb(newpaths,paths,names):
	message(SIMPLE,"Copy samdb")
	shutil.copy(newpaths.samdb,paths.samdb)

	message(SIMPLE,"Update partitions filename if needed")
	schemaldb=os.path.join(paths.private_dir,"schema.ldb")
	configldb=os.path.join(paths.private_dir,"configuration.ldb")
	usersldb=os.path.join(paths.private_dir,"users.ldb")
	samldbdir=os.path.join(paths.private_dir,"sam.ldb.d")

	if not os.path.isdir(samldbdir):
		os.mkdir(samldbdir)
		os.chmod(samldbdir,0700)
	if os.path.isfile(schemaldb):
		shutil.copy(schemaldb,os.path.join(samldbdir,"%s.ldb"%str(names.schemadn).upper()))
		os.remove(schemaldb)
	if os.path.isfile(usersldb):
		shutil.copy(usersldb,os.path.join(samldbdir,"%s.ldb"%str(names.rootdn).upper()))
		os.remove(usersldb)
	if os.path.isfile(configldb):
		shutil.copy(configldb,os.path.join(samldbdir,"%s.ldb"%str(names.configdn).upper()))
		os.remove(configldb)

def update_privilege(newpaths,paths):
	message(SIMPLE,"Copy privilege")
	shutil.copy(os.path.join(newpaths.private_dir,"privilege.ldb"),os.path.join(paths.private_dir,"privilege.ldb"))

# For each partition check the differences
def update_samdb(newpaths,paths,creds,session,names):

	message(SIMPLE, "Doing schema update")
	hashdef = check_diff_name(newpaths,paths,creds,session,str(names.schemadn),names,1)
	message(SIMPLE,"Done with schema update")
	message(SIMPLE,"Scanning whole provision for updates and additions")
	hashSD = check_diff_name(newpaths,paths,creds,session,str(names.rootdn),names,0)
	message(SIMPLE,"Done with scanning")

def update_machine_account_password(paths,creds,session,names):

	secrets_ldb = Ldb(paths.secrets, session_info=session, credentials=creds,lp=lp)
	secrets_ldb.transaction_start()
	secrets_msg = secrets_ldb.search(expression=("samAccountName=%s$" % names.netbiosname), attrs=["secureChannelType"])
	sam_ldb = Ldb(paths.samdb, session_info=session, credentials=creds,lp=lp)
	sam_ldb.transaction_start()
	if int(secrets_msg[0]["secureChannelType"][0]) == SEC_CHAN_BDC:
		res = sam_ldb.search(expression=("samAccountName=%s$" % names.netbiosname), attrs=[])
		assert(len(res) == 1)

		msg = ldb.Message(res[0].dn)
		machinepass = glue.generate_random_str(12)
		msg["userPassword"] = ldb.MessageElement(machinepass, ldb.FLAG_MOD_REPLACE, "userPassword")
		sam_ldb.modify(msg)

		res = sam_ldb.search(expression=("samAccountName=%s$" % names.netbiosname),
				     attrs=["msDs-keyVersionNumber"])
		assert(len(res) == 1)
		kvno = int(str(res[0]["msDs-keyVersionNumber"]))

		secretsdb_self_join(secrets_ldb, domain=names.domain,
				    realm=names.realm,
				    domainsid=names.domainsid,
				    dnsdomain=names.dnsdomain,
				    netbiosname=names.netbiosname,
				    machinepass=machinepass,
				    key_version_number=kvno,
				    secure_channel_type=int(secrets_msg[0]["secureChannelType"][0]))
		sam_ldb.transaction_prepare_commit()
		secrets_ldb.transaction_prepare_commit()
		sam_ldb.transaction_commit()
		secrets_ldb.transaction_commit()
	else:
		secrets_ldb.transaction_cancel()

# From here start the big steps of the program
# First get files paths
paths=get_paths(smbconf=smbconf)
paths.setup = setup_dir
def setup_path(file):
	return os.path.join(setup_dir, file)
# Guess all the needed names (variables in fact) from the current
# provision.
names = guess_names_from_current_provision(creds,session,paths)
# Let's see them
print_names(names)
# With all this information let's create a fresh new provision used as reference
provisiondir = newprovision(names,setup_dir,creds,session,smbconf)
# Get file paths of this new provision
newpaths = get_paths(targetdir=provisiondir)
populate_backlink(newpaths,creds,session,names.schemadn)
# Check the difference
update_basesamdb(newpaths,paths,names)

if opts.full:
	update_samdb(newpaths,paths,creds,session,names)
update_secrets(newpaths,paths,creds,session)
update_privilege(newpaths,paths)
update_machine_account_password(paths,creds,session,names)
# SD should be created with admin but as some previous acl were so wrong that admin can't modify them we have first
# to recreate them with the good form but with system account and then give the ownership to admin ...
admin_session_info = admin_session(lp, str(names.domainsid))
message(SIMPLE,"Updating SD")
update_sd(paths,creds,session,names)
update_sd(paths,creds,admin_session_info,names)
check_updated_sd(newpaths,paths,creds,session,names)
message(SIMPLE,"Upgrade finished !")
# remove reference provision now that everything is done !
rmall(provisiondir)