#!/usr/bin/env python # vim: expandtab # # Copyright (C) Matthieu Patou 2009 # # Based on provision a Samba4 server by # Copyright (C) Jelmer Vernooij 2007-2008 # Copyright (C) Andrew Bartlett 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 . import logging import optparse import os import shutil import sys import tempfile import re import traceback # Allow to run from s4 source directory (without installing samba) sys.path.insert(0, "bin/python") import samba import samba.getopt as options from samba.credentials import DONT_USE_KERBEROS from samba.auth import system_session, admin_session from samba import Ldb, version from ldb import SCOPE_ONELEVEL, SCOPE_SUBTREE, SCOPE_BASE,\ FLAG_MOD_REPLACE, FLAG_MOD_ADD, FLAG_MOD_DELETE,\ MessageElement, Message, Dn from samba import param from samba.misc import messageEltFlagToString from samba.provision import find_setup_dir, get_domain_descriptor,\ get_config_descriptor, secretsdb_self_join,\ set_gpo_acl, getpolicypath,create_gpo_struct,\ ProvisioningError, getLastProvisionUSN,\ get_max_usn, updateProvisionUSN from samba.schema import get_linked_attributes, Schema, get_schema_descriptor from samba.dcerpc import security, drsblobs from samba.ndr import ndr_unpack from samba.dcerpc.misc import SEC_CHAN_BDC from samba.upgradehelpers import dn_sort, get_paths, newprovision,\ find_provision_key_parameters, get_ldbs,\ usn_in_range, identic_rename, get_diff_sddls replace=2**FLAG_MOD_REPLACE add=2**FLAG_MOD_ADD delete=2**FLAG_MOD_DELETE never=0 # Will be modified during provision to tell if default sd has been modified # somehow ... #Errors are always logged ERROR = -1 SIMPLE = 0x00 CHANGE = 0x01 CHANGESD = 0x02 GUESS = 0x04 PROVISION = 0x08 CHANGEALL = 0xff __docformat__ = "restructuredText" # 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 # This also apply to imported object from reference provision hashAttrNotCopied = { "dn": 1, "whenCreated": 1, "whenChanged": 1, "objectGUID": 1, "uSNCreated": 1, "replPropertyMetaData": 1, "uSNChanged": 1, "parentGUID": 1, "objectCategory": 1, "distinguishedName": 1, "nTMixedDomain": 1, "showInAdvancedViewOnly": 1, "instanceType": 1, "msDS-Behavior-Version":1, "nextRid":1, "cn": 1, "versionNumber":1, "lmPwdHistory":1, "pwdLastSet": 1, "ntPwdHistory":1, "unicodePwd":1,"dBCSPwd":1, "supplementalCredentials":1, "gPCUserExtensionNames":1, "gPCMachineExtensionNames":1,"maxPwdAge":1, "secret":1, "possibleInferiors":1, "privilege":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. # But for attribute that are just missing we do not have to specify them as the default # behavior is to add missing attribute hashOverwrittenAtt = { "prefixMap": replace, "systemMayContain": replace, "systemOnly":replace, "searchFlags":replace, "mayContain":replace, "systemFlags":replace+add, "description":replace, "operatingSystemVersion":replace, "adminPropertyPages":replace, "groupType":replace, "wellKnownObjects":replace, "privilege":never, "defaultSecurityDescriptor": replace, "rIDAvailablePool": never, "defaultSecurityDescriptor": replace + add } backlinked = [] forwardlinked = {} dn_syntax_att = [] 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", action="store_true", help="Print information on what is different but won't be changed") parser.add_option("--debugchange", action="store_true", help="Print information on what is different but won't be changed") parser.add_option("--debugchangesd", action="store_true", help="Print information security descriptors differences") parser.add_option("--debugall", action="store_true", help="Print all available information (very verbose)") parser.add_option("--full", action="store_true", help="Perform full upgrade of the samdb (schema, configuration, new objects, ...") opts = parser.parse_args()[0] handler = logging.StreamHandler(sys.stdout) upgrade_logger = logging.getLogger("upgradeprovision") upgrade_logger.addHandler(handler) provision_logger = logging.getLogger("provision") provision_logger.addHandler(handler) whatToLog = define_what_to_log(opts) def message(what, text): """Print a message if this message type has been selected to be printed :param what: Category of the message :param text: Message to print """ if (whatToLog & what) or what <= 0: upgrade_logger.info("%s", 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() def check_for_DNS(refprivate, private): """Check if the provision has already the requirement for dynamic dns :param refprivate: The path to the private directory of the reference provision :param private: The path to the private directory of the upgraded provision""" spnfile = "%s/spn_update_list" % private namedfile = lp.get("dnsupdate:path") if not namedfile: namedfile = "%s/named.conf.update" % private if not os.path.exists(spnfile): shutil.copy("%s/spn_update_list" % refprivate, "%s" % spnfile) destdir = "%s/new_dns" % private dnsdir = "%s/dns" % private if not os.path.exists(namedfile): if not os.path.exists(destdir): os.mkdir(destdir) if not os.path.exists(dnsdir): os.mkdir(dnsdir) shutil.copy("%s/named.conf" % refprivate, "%s/named.conf" % destdir) shutil.copy("%s/named.txt" % refprivate, "%s/named.txt" % destdir) message(SIMPLE, "It seems that you provision didn't integrate new rules " "for dynamic dns update of domain related entries") message(SIMPLE, "A copy of the new bind configuration files and " "template as been put in %s, you should read them and configure dynamic " " dns update" % destdir) def populate_links(samdb, schemadn): """Populate an array with all the back linked attributes This attributes that are modified automaticaly when front attibutes are changed :param samdb: A LDB object for sam.ldb file :param schemadn: DN of the schema for the partition""" linkedAttHash = get_linked_attributes(Dn(samdb, str(schemadn)), samdb) backlinked.extend(linkedAttHash.values()) for t in linkedAttHash.keys(): forwardlinked[t] = 1 def populate_dnsyntax(samdb, schemadn): """Populate an array with all the attributes that have DN synthax (oid 2.5.5.1) :param samdb: A LDB object for sam.ldb file :param schemadn: DN of the schema for the partition""" res = samdb.search(expression="(attributeSyntax=2.5.5.1)", base=Dn(samdb, str(schemadn)), scope=SCOPE_SUBTREE, attrs=["lDAPDisplayName"]) for elem in res: dn_syntax_att.append(elem["lDAPDisplayName"]) def sanitychecks(samdb, names): """Make some checks before trying to update :param samdb: An LDB object opened on sam.ldb :param names: list of key provision parameters :return: Status of check (1 for Ok, 0 for not Ok) """ res = samdb.search(expression="objectClass=ntdsdsa", base=str(names.configdn), scope=SCOPE_SUBTREE, attrs=["dn"], controls=["search_options:1:2"]) if len(res) == 0: print "No DC found, your provision is most probably hardly broken !" return False elif len(res) != 1: print "Found %d domain controllers, for the moment upgradeprovision" \ "is not able to handle upgrade on domain with more than one DC, please demote" \ " the other(s) DC(s) before upgrading" % len(res) return False else: return True def print_provision_key_parameters(names): """Do a a pretty print of provision parameters :param names: list of key provision parameters """ 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)) def handle_special_case(att, delta, new, old, usn): """Define more complicate update rules for some attributes :param att: The attribute to be updated :param delta: A messageElement object that correspond to the difference between the updated object and the reference one :param new: The reference object :param old: The Updated object :param usn: The highest usn modified by a previous (upgrade)provision :return: True to indicate that the attribute should be kept, False for discarding it""" flag = delta.get(att).flags() # We do most of the special case handle if we do not have the # highest usn as otherwise the replPropertyMetaData will guide us more # correctly if usn == None: if (att == "member" and flag == 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] = MessageElement(newval, FLAG_MOD_REPLACE, att) else: delta.remove(att) return True if (att == "gPLink" or att == "gPCFileSysPath") and \ flag == FLAG_MOD_REPLACE and\ str(new[0].dn).lower() == str(old[0].dn).lower(): delta.remove(att) return True if att == "forceLogoff": ref=0x8000000000000000 oldval=int(old[0][att][0]) newval=int(new[0][att][0]) ref == old and ref == abs(new) return True if (att == "adminDisplayName" or att == "adminDescription"): return True if (str(old[0].dn) == "CN=Samba4-Local-Domain, %s" % (str(names.schemadn))\ and att == "defaultObjectCategory" and flag == FLAG_MOD_REPLACE): return True if (str(old[0].dn) == "CN=Title, %s" % (str(names.schemadn)) and att == "rangeUpper" and flag == FLAG_MOD_REPLACE): return True if (str(old[0].dn) == "%s" % (str(names.rootdn)) and att == "subRefs" and flag == FLAG_MOD_REPLACE): return True if str(delta.dn).endswith("CN=DisplaySpecifiers, %s" % names.configdn): return True # This is a bit of special animal as we might have added # already SPN entries to the list that has to be modified # So we go in detail to try to find out what has to be added ... if ( att == "servicePrincipalName" and flag == 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] = MessageElement(newval, FLAG_MOD_REPLACE, att) else: delta.remove(att) return True return False def update_secrets(newsecrets_ldb, secrets_ldb): """Update secrets.ldb :param newsecrets_ldb: An LDB object that is connected to the secrets.ldb of the reference provision :param secrets_ldb: An LDB object that is connected to the secrets.ldb of the updated provision""" message(SIMPLE, "update secrets.ldb") 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) 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 = 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]) for att in hashAttrNotCopied.keys(): delta.remove(att) for att in delta: 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]) for att in hashAttrNotCopied.keys(): delta.remove(att) for att in delta: if att != "dn": message(CHANGE, " Adding/Changing attribute %s to %s"%(att,current[0].dn)) delta.dn = current[0].dn secrets_ldb.modify(delta) def dump_denied_change(dn, att, flagtxt, current, reference): """Print detailed information about why a changed is denied :param dn: DN of the object which attribute is denied :param att: Attribute that was supposed to be upgraded :param flagtxt: Type of the update that should be performed (add, change, remove, ...) :param current: Value(s) of the current attribute :param reference: Value(s) of the reference attribute""" message(CHANGE, "dn= " + str(dn)+" " + att+" with flag " + flagtxt +" is not allowed to be changed/removed, I discard this change") if att != "objectSid" : i = 0 for e in range(0, len(current)): message(CHANGE, "old %d : %s" % (i, str(current[e]))) i+=1 if reference != None: i = 0 for e in range(0, len(reference)): message(CHANGE, "new %d : %s" % (i, str(reference[e]))) i+=1 else: message(CHANGE, "old : %s" % str(ndr_unpack( security.dom_sid, current[0]))) message(CHANGE, "new : %s" % str(ndr_unpack( security.dom_sid, reference[0]))) def handle_special_add(samdb, dn, names): """Handle special operation (like remove) on some object needed during upgrade This is mostly due to wrong creation of the object in previous provision. :param samdb: An Ldb object representing the SAM database :param dn: DN of the object to inspect :param names: list of key provision parameters""" dntoremove = None if str(dn).lower() == ("CN=IIS_IUSRS, CN=Builtin, %s" % names.rootdn).lower(): #This entry was misplaced lets remove it if it exists dntoremove = "CN=IIS_IUSRS, CN=Users, %s" % names.rootdn objname = "CN=Certificate Service DCOM Access, CN=Builtin, %s" % names.rootdn if str(dn).lower() == objname.lower(): #This entry was misplaced lets remove it if it exists dntoremove = "CN=Certificate Service DCOM Access,"\ "CN=Users, %s" % names.rootdn objname = "CN=Cryptographic Operators, CN=Builtin, %s" % names.rootdn if str(dn).lower() == objname.lower(): #This entry was misplaced lets remove it if it exists dntoremove = "CN=Cryptographic Operators, CN=Users, %s" % names.rootdn objname = "CN=Event Log Readers, CN=Builtin, %s" % names.rootdn if str(dn).lower() == objname.lower(): #This entry was misplaced lets remove it if it exists dntoremove = "CN=Event Log Readers, CN=Users, %s" % names.rootdn if dntoremove != None: res = samdb.search(expression="(dn=%s)" % dntoremove, base=str(names.rootdn), scope=SCOPE_SUBTREE, attrs=["dn"], controls=["search_options:1:2"]) if len(res) > 0: message(CHANGE, "Existing object %s must be replaced by %s,"\ "removing old object" % (dntoremove, str(dn))) samdb.delete(res[0]["dn"]) def check_dn_nottobecreated(hash, index, listdn): """Check if one of the DN present in the list has a creation order greater than the current. Hash is indexed by dn to be created, with each key is associated the creation order. First dn to be created has the creation order 0, second has 1, ... Index contain the current creation order :param hash: Hash holding the different DN of the object to be created as key :param index: Current creation order :param listdn: List of DNs on which the current DN depends on :return: None if the current object do not depend on other object or if all object have been created before.""" if listdn == None: return None for dn in listdn: key = str(dn).lower() if hash.has_key(key) and hash[key] > index: return str(dn) return None def add_missing_object(ref_samdb, samdb, dn, names, basedn, hash, index): """Add a new object if the dependencies are satisfied The function add the object if the object on which it depends are already created :param ref_samdb: Ldb object representing the SAM db of the reference provision :param samdb: Ldb object representing the SAM db of the upgraded provision :param dn: DN of the object to be added :param names: List of key provision parameters :param basedn: DN of the partition to be updated :param hash: Hash holding the different DN of the object to be created as key :param index: Current creation order :return: True if the object was created False otherwise""" handle_special_add(samdb, dn, names) reference = ref_samdb.search(expression="dn=%s" % (str(dn)), base=basedn, scope=SCOPE_SUBTREE, controls=["search_options:1:2"]) empty = Message() delta = samdb.msg_diff(empty, reference[0]) delta.dn for att in hashAttrNotCopied.keys(): delta.remove(att) for att in backlinked: delta.remove(att) depend_on_yettobecreated = None for att in dn_syntax_att: depend_on_yet_tobecreated = check_dn_nottobecreated(hash, index, delta.get(str(att))) if depend_on_yet_tobecreated != None: message(CHANGE, "Object %s depends on %s in attribute %s," \ "delaying the creation" % (str(dn), \ depend_on_yet_tobecreated, str(att))) return False delta.dn = dn message(CHANGE,"Object %s will be added" % dn) samdb.add(delta, ["relax:0"]) return True def gen_dn_index_hash(listMissing): """Generate a hash associating the DN to its creation order :param listMissing: List of DN :return: Hash with DN as keys and creation order as values""" hash = {} for i in range(0, len(listMissing)): hash[str(listMissing[i]).lower()] = i return hash def add_deletedobj_containers(ref_samdb, samdb, names): """Add the object containter: CN=Deleted Objects This function create the container for each partition that need one and then reference the object into the root of the partition :param ref_samdb: Ldb object representing the SAM db of the reference provision :param samdb: Ldb object representing the SAM db of the upgraded provision :param names: List of key provision parameters""" wkoPrefix = "B:32:18E2EA80684F11D2B9AA00C04F79F805" partitions = [str(names.rootdn), str(names.configdn)] for part in partitions: ref_delObjCnt = ref_samdb.search(expression="(cn=Deleted Objects)", base=part, scope=SCOPE_SUBTREE, attrs=["dn"], controls=["show_deleted:0"]) delObjCnt = samdb.search(expression="(cn=Deleted Objects)", base=part, scope=SCOPE_SUBTREE, attrs=["dn"], controls=["show_deleted:0"]) if len(ref_delObjCnt) > len(delObjCnt): reference = ref_samdb.search(expression="cn=Deleted Objects", base=part, scope=SCOPE_SUBTREE, controls=["show_deleted:0"]) empty = Message() delta = samdb.msg_diff(empty, reference[0]) delta.dn = Dn(samdb, str(reference[0]["dn"])) for att in hashAttrNotCopied.keys(): delta.remove(att) samdb.add(delta) listwko = [] res = samdb.search(expression="(objectClass=*)", base=part, scope=SCOPE_BASE, attrs=["dn", "wellKnownObjects"]) targetWKO = "%s:%s" % (wkoPrefix, str(reference[0]["dn"])) found = 0 if len(res[0]) > 0: wko = res[0]["wellKnownObjects"] # The wellKnownObject that we want to add. for o in wko: if str(o) == targetWKO: found = 1 listwko.append(str(o)) if not found: listwko.append(targetWKO) delta = Message() delta.dn = Dn(samdb, str(res[0]["dn"])) delta["wellKnownObjects"] = MessageElement(listwko, FLAG_MOD_REPLACE, "wellKnownObjects" ) samdb.modify(delta) def add_missing_entries(ref_samdb, samdb, names, basedn, list): """Add the missing object whose DN is the list The function add the object if the objects on which it depends are already created. :param ref_samdb: Ldb object representing the SAM db of the reference provision :param samdb: Ldb object representing the SAM db of the upgraded provision :param dn: DN of the object to be added :param names: List of key provision parameters :param basedn: DN of the partition to be updated :param list: List of DN to be added in the upgraded provision""" listMissing = [] listDefered = list while(len(listDefered) != len(listMissing) and len(listDefered) > 0): index = 0 listMissing = listDefered listDefered = [] hashMissing = gen_dn_index_hash(listMissing) for dn in listMissing: ret = add_missing_object(ref_samdb, samdb, dn, names, basedn, hashMissing, index) index = index + 1 if ret == 0: # DN can't be created because it depends on some # other DN in the list listDefered.append(dn) if len(listDefered) != 0: raise ProvisioningError("Unable to insert missing elements:" \ "circular references") def handle_links(samdb, att, basedn, dn, value, ref_value, delta): """This function handle updates on links :param samdb: An LDB object pointing to the updated provision :param att: Attribute to update :param basedn: The root DN of the provision :param dn: The DN of the inspected object :param value: The value of the attribute :param ref_value: The value of this attribute in the reference provision :param delta: The MessageElement object that will be applied for transforming the current provision""" res = samdb.search(expression="dn=%s" % dn, base=basedn, controls=["search_options:1:2", "reveal:1"], attrs=[att]) blacklist = {} hash = {} newlinklist = [] changed = 0 newlinklist.extend(value) for e in value: hash[e] = 1 # for w2k domain level the reveal won't reveal anything ... # it means that we can readd links that were removed on purpose ... # Also this function in fact just accept add not removal for e in res[0][att]: if not hash.has_key(e): # We put in the blacklist all the element that are in the "revealed" # result and not in the "standard" result # This element are links that were removed before and so that # we don't wan't to readd blacklist[e] = 1 for e in ref_value: if not blacklist.has_key(e) and not hash.has_key(e): newlinklist.append(str(e)) changed = 1 if changed: delta[att] = MessageElement(newlinklist, FLAG_MOD_REPLACE, att) else: delta.remove(att) def update_present(ref_samdb, samdb, basedn, listPresent, usns, invocationid): """ This function updates the object that are already present in the provision :param ref_samdb: An LDB object pointing to the reference provision :param samdb: An LDB object pointing to the updated provision :param basedn: A string with the value of the base DN for the provision (ie. DC=foo, DC=bar) :param listPresent: A list of object that is present in the provision :param usns: A list of USN range modified by previous provision and upgradeprovision :param invocationid: The value of the invocationid for the current DC""" global defSDmodified # This hash is meant to speedup lookup of attribute name from an oid, # it's for the replPropertyMetaData handling hash_oid_name = {} res = samdb.search(expression="objectClass=attributeSchema", base=basedn, controls=["search_options:1:2"], attrs=["attributeID", "lDAPDisplayName"]) if len(res) > 0: for e in res: strDisplay = str(e.get("lDAPDisplayName")) hash_oid_name[str(e.get("attributeID"))] = strDisplay else: msg = "Unable to insert missing elements: circular references" raise ProvisioningError(msg) changed = 0 controls = ["search_options:1:2", "sd_flags:1:2"] for dn in listPresent: reference = ref_samdb.search(expression="dn=%s" % (str(dn)), base=basedn, scope=SCOPE_SUBTREE, controls=controls) current = samdb.search(expression="dn=%s" % (str(dn)), base=basedn, scope=SCOPE_SUBTREE, controls=controls) 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(samdb, reference[0].dn) current = samdb.search(expression="dn=%s" % (str(dn)), base=basedn, scope=SCOPE_SUBTREE, controls=["search_options:1:2"]) delta = samdb.msg_diff(current[0], reference[0]) for att in hashAttrNotCopied.keys(): delta.remove(att) for att in backlinked: delta.remove(att) delta.remove("name") if len(delta.items()) > 1 and usns != None: # Fetch the replPropertyMetaData res = samdb.search(expression="dn=%s" % (str(dn)), base=basedn, scope=SCOPE_SUBTREE, controls=controls, attrs=["replPropertyMetaData"]) ctr = ndr_unpack(drsblobs.replPropertyMetaDataBlob, str(res[0]["replPropertyMetaData"])).ctr hash_attr_usn = {} for o in ctr.array: # We put in this hash only modification # made on the current host att = hash_oid_name[samdb.get_oid_from_attid(o.attid)] if str(o.originating_invocation_id) == str(invocationid): hash_attr_usn[att] = o.originating_usn else: hash_attr_usn[att] = -1 isFirst = 0 txt = "" for att in delta: if usns != None: if forwardlinked.has_key(att): handle_links(samdb, att, basedn, current[0]["dn"], current[0][att], reference[0][att], delta) if isFirst == 0 and len(delta.items())>1: isFirst = 1 txt = "%s\n" % (str(dn)) if att == "dn": continue if att == "rIDAvailablePool": delta.remove(att) continue if att == "objectSid": delta.remove(att) continue if att == "creationTime": delta.remove(att) continue if att == "oEMInformation": delta.remove(att) continue if att == "msDs-KeyVersionNumber": delta.remove(att) continue if handle_special_case(att, delta, reference, current, usns): # This attribute is "complicated" to handle and handling # was done in handle_special_case continue attrUSN = hash_attr_usn.get(att) if att == "forceLogoff" and attrUSN == None: continue if attrUSN == None: delta.remove(att) continue if attrUSN == -1: # This attribute was last modified by another DC forget # about it message(CHANGE, "%sAttribute: %s has been" \ "created/modified/deleted by another DC," " do nothing" % (txt, att )) txt = "" delta.remove(att) continue elif usn_in_range(int(attrUSN), usns) == 0: message(CHANGE, "%sAttribute: %s has been" \ "created/modified/deleted not during a" \ " provision or upgradeprovision: current" \ " usn %d , do nothing" % (txt, att, attrUSN)) txt = "" delta.remove(att) continue else: if att == "defaultSecurityDescriptor": defSDmodified = 1 if attrUSN: message(CHANGE, "%sAttribute: %s will be modified" \ "/deleted it was last modified" \ "during a provision, current usn:" \ "%d" % (txt, att, attrUSN)) txt = "" else: message(CHANGE, "%sAttribute: %s will be added because" \ " it hasn't existed before " % (txt, att)) txt = "" continue else: # Old school way of handling things for pre alpha12 upgrade defSDmodified = 1 msgElt = delta.get(att) if att == "nTSecurityDescriptor": delta.remove(att) continue if att == "dn": continue if not hashOverwrittenAtt.has_key(att): if msgElt.flags() != FLAG_MOD_ADD: if not handle_special_case(att, delta, reference, current, usns): if opts.debugchange or opts.debugall: try: dump_denied_change(dn, att, messageEltFlagToString(msgElt.flags()), current[0][att], reference[0][att]) except KeyError: dump_denied_change(dn, att, messageEltFlagToString(msgElt.flags()), current[0][att], None) delta.remove(att) continue else: if hashOverwrittenAtt.get(att)&2**msgElt.flags() : continue elif hashOverwrittenAtt.get(att)==never: delta.remove(att) continue delta.dn = dn if len(delta.items()) >1: attributes=", ".join(delta.keys()) message(CHANGE, "%s is different from the reference one, changed" \ " attributes: %s\n" % (dn, attributes)) changed = changed + 1 samdb.modify(delta) return changed def update_partition(ref_samdb, samdb, basedn, names, schema, provisionUSNs): """Check differences between the reference provision and the upgraded one. It looks for all objects which base DN is name. This function will also add the missing object and update existing object to add or remove attributes that were missing. :param ref_sambdb: An LDB object conntected to the sam.ldb of the reference provision :param samdb: An LDB object connected to the sam.ldb of the update provision :param basedn: String value of the DN of the partition :param names: List of key provision parameters :param schema: A Schema object :param provisionUSNs: The USNs modified by provision/upgradeprovision last time""" hash_new = {} hash = {} listMissing = [] listPresent = [] reference = [] current = [] # Connect to the reference provision and get all the attribute in the # partition referred by name reference = ref_samdb.search(expression="objectClass=*", base=basedn, scope=SCOPE_SUBTREE, attrs=["dn"], controls=["search_options:1:2"]) current = samdb.search(expression="objectClass=*", base=basedn, scope=SCOPE_SUBTREE, attrs=["dn"], controls=["search_options:1:2"]) # 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): if not str(hash_new[k]) == "CN=Deleted Objects, %s" % names.rootdn: 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) # The following lines 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 samdb.set_schema_from_ldb(schema.ldb) try: message(SIMPLE, "There are %d missing objects" % (len(listMissing))) add_deletedobj_containers(ref_samdb, samdb, names) add_missing_entries(ref_samdb, samdb, names, basedn, listMissing) changed = update_present(ref_samdb, samdb, basedn, listPresent, provisionUSNs, names.invocation) message(SIMPLE, "There are %d changed objects" % (changed)) return 1 except StandardError, err: message(ERROR, "Exception during upgrade of samdb:") (typ, val, tb) = sys.exc_info() traceback.print_exception(typ, val, tb) return 0 def check_updated_sd(ref_sam, cur_sam, names): """Check if the security descriptor in the upgraded provision are the same as the reference :param ref_sam: A LDB object connected to the sam.ldb file used as the reference provision :param cur_sam: A LDB object connected to the sam.ldb file used as upgraded provision :param names: List of key provision parameters""" reference = ref_sam.search(expression="objectClass=*", base=str(names.rootdn), scope=SCOPE_SUBTREE, attrs=["dn", "nTSecurityDescriptor"], controls=["search_options:1:2"]) current = cur_sam.search(expression="objectClass=*", base=str(names.rootdn), scope=SCOPE_SUBTREE, attrs=["dn", "nTSecurityDescriptor"], controls=["search_options:1:2"]) hash = {} for i in range(0, len(reference)): refsd = ndr_unpack(security.descriptor, str(reference[i]["nTSecurityDescriptor"])) hash[str(reference[i]["dn"]).lower()] = refsd.as_sddl(names.domainsid) for i in range(0, len(current)): key = str(current[i]["dn"]).lower() if hash.has_key(key): cursd = ndr_unpack(security.descriptor, str(current[i]["nTSecurityDescriptor"])) sddl = cursd.as_sddl(names.domainsid) if sddl != hash[key]: txt = get_diff_sddls(hash[key], sddl) if txt != "": message(CHANGESD, "On object %s ACL is different"\ " \n%s" % (current[i]["dn"], txt)) def fix_partition_sd(samdb, names): """This function fix the SD for partition containers (basedn, configdn, ...) This is needed because some provision use to have broken SD on containers :param samdb: An LDB object pointing to the sam of the current provision :param names: A list of key provision parameters """ # First update the SD for the rootdn res = samdb.search(expression="objectClass=*", base=str(names.rootdn), scope=SCOPE_BASE, attrs=["dn", "whenCreated"], controls=["search_options:1:2"]) delta = Message() delta.dn = Dn(samdb, str(res[0]["dn"])) descr = get_domain_descriptor(names.domainsid) delta["nTSecurityDescriptor"] = MessageElement(descr, FLAG_MOD_REPLACE, "nTSecurityDescriptor") samdb.modify(delta, ["recalculate_sd:0"]) # Then the config dn res = samdb.search(expression="objectClass=*", base=str(names.configdn), scope=SCOPE_BASE, attrs=["dn", "whenCreated"], controls=["search_options:1:2"]) delta = Message() delta.dn = Dn(samdb, str(res[0]["dn"])) descr = get_config_descriptor(names.domainsid) delta["nTSecurityDescriptor"] = MessageElement(descr, FLAG_MOD_REPLACE, "nTSecurityDescriptor" ) samdb.modify(delta, ["recalculate_sd:0"]) # Then the schema dn res = samdb.search(expression="objectClass=*", base=str(names.schemadn), scope=SCOPE_BASE, attrs=["dn", "whenCreated"], controls=["search_options:1:2"]) delta = Message() delta.dn = Dn(samdb, str(res[0]["dn"])) descr = get_schema_descriptor(names.domainsid) delta["nTSecurityDescriptor"] = MessageElement(descr, FLAG_MOD_REPLACE, "nTSecurityDescriptor" ) samdb.modify(delta, ["recalculate_sd:0"]) def rebuild_sd(samdb, names): """Rebuild security descriptor of the current provision from scratch During the different pre release of samba4 security descriptors (SD) were notarly broken (up to alpha11 included) This function allow to get them back in order, this function make the assumption that nobody has modified manualy an SD and so SD can be safely recalculated from scratch to get them right. :param names: List of key provision parameters""" hash = {} res = samdb.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 = Message() delta.dn = Dn(samdb, key) delta["whenCreated"] = MessageElement(hash[key], FLAG_MOD_REPLACE, "whenCreated" ) samdb.modify(delta, ["recalculate_sd:0"]) except: # XXX: We should always catch an explicit exception. # What could go wrong here? samdb.transaction_cancel() res = samdb.search(expression="objectClass=*", base=str(names.rootdn), scope=SCOPE_SUBTREE, attrs=["dn", "nTSecurityDescriptor"], controls=["search_options:1:2"]) badsd = ndr_unpack(security.descriptor, str(res[0]["nTSecurityDescriptor"])) print "bad stuff %s"%badsd.as_sddl(names.domainsid) return def removeProvisionUSN(samdb): attrs = [samba.provision.LAST_PROVISION_USN_ATTRIBUTE, "dn"] entry = samdb.search(expression="dn=@PROVISION", base = "", scope=SCOPE_SUBTREE, controls=["search_options:1:2"], attrs=attrs) empty = Message() empty.dn = entry[0].dn delta = samdb.msg_diff(entry[0], empty) delta.remove("dn") delta.dn = entry[0].dn samdb.modify(delta) def delta_update_basesamdb(refpaths, paths, creds, session, lp): """Update the provision container db: sam.ldb This function is aimed for alpha9 and newer; :param refpaths: An object holding the different importants paths for reference provision object :param paths: An object holding the different importants paths for upgraded provision object :param creds: Credential used for openning LDB files :param session: Session to use for openning LDB files :param lp: A loadparam object""" message(SIMPLE, "Update base samdb by searching difference with reference one") refsam = Ldb(refpaths.samdb, session_info=session, credentials=creds, lp=lp, options=["modules:"]) sam = Ldb(paths.samdb, session_info=session, credentials=creds, lp=lp, options=["modules:"]) empty = Message() reference = refsam.search(expression="") for refentry in reference: entry = sam.search(expression="dn=%s" % refentry["dn"], scope=SCOPE_SUBTREE) if not len(entry): message(CHANGE, "Adding %s to sam db" % str(delta.dn)) delta = sam.msg_diff(empty, refentry) if str(refentry.dn) == "@PROVISION" and\ delta.get(samba.provision.LAST_PROVISION_USN_ATTRIBUTE): delta.remove(samba.provision.LAST_PROVISION_USN_ATTRIBUTE) delta.dn = refentry.dn sam.add(delta) else: delta = sam.msg_diff(entry[0], refentry) if str(refentry.dn) == "@PROVISION" and\ delta.get(samba.provision.LAST_PROVISION_USN_ATTRIBUTE): delta.remove(samba.provision.LAST_PROVISION_USN_ATTRIBUTE) if len(delta.items()) > 1: delta.dn = refentry.dn sam.modify(delta) def simple_update_basesamdb(newpaths, paths, names): """Update the provision container db: sam.ldb This function is aimed at very old provision (before alpha9) :param newpaths: List of paths for different provision objects from the reference provision :param paths: List of paths for different provision objects from the upgraded provision :param names: List of key provision parameters""" 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(ref_private_path, cur_private_path): """Update the privilege database :param ref_private_path: Path to the private directory of the reference provision. :param cur_private_path: Path to the private directory of the current (and to be updated) provision.""" message(SIMPLE, "Copy privilege") shutil.copy(os.path.join(ref_private_path, "privilege.ldb"), os.path.join(cur_private_path, "privilege.ldb")) def update_samdb(ref_samdb, samdb, names, highestUSN, schema): """Upgrade the SAM DB contents for all the provision partitions :param ref_sambdb: An LDB object conntected to the sam.ldb of the reference provision :param samdb: An LDB object connected to the sam.ldb of the update provision :param names: List of key provision parameters :param highestUSN: The highest USN modified by provision/upgradeprovision last time :param schema: A Schema object that represent the schema of the provision""" message(SIMPLE, "Starting update of samdb") ret = update_partition(ref_samdb, samdb, str(names.rootdn), names, schema, highestUSN) if ret: message(SIMPLE, "Update of samdb finished") return 1 else: message(SIMPLE, "Update failed") return 0 def update_machine_account_password(samdb, secrets_ldb, names): """Update (change) the password of the current DC both in the SAM db and in secret one :param samdb: An LDB object related to the sam.ldb file of a given provision :param secrets_ldb: An LDB object related to the secrets.ldb file of a given provision :param names: List of key provision parameters""" message(SIMPLE, "Update machine account") expression = "samAccountName=%s$" % names.netbiosname secrets_msg = secrets_ldb.search(expression=expression, attrs=["secureChannelType"]) if int(secrets_msg[0]["secureChannelType"][0]) == SEC_CHAN_BDC: res = samdb.search(expression=expression, attrs=[]) assert(len(res) == 1) msg = Message(res[0].dn) machinepass = samba.generate_random_password(128, 255) msg["userPassword"] = MessageElement(machinepass, FLAG_MOD_REPLACE, "userPassword") samdb.modify(msg) res = samdb.search(expression=("samAccountName=%s$" % names.netbiosname), attrs=["msDs-keyVersionNumber"]) assert(len(res) == 1) kvno = int(str(res[0]["msDs-keyVersionNumber"])) secChanType = int(secrets_msg[0]["secureChannelType"][0]) secretsdb_self_join(secrets_ldb, domain=names.domain, realm=names.realm or sambaopts._lp.get('realm'), domainsid=names.domainsid, dnsdomain=names.dnsdomain, netbiosname=names.netbiosname, machinepass=machinepass, key_version_number=kvno, secure_channel_type=secChanType) else: raise ProvisioningError("Unable to find a Secure Channel" \ "of type SEC_CHAN_BDC") def update_gpo(paths, creds, session, names): """Create missing GPO file object if needed Set ACL correctly also. """ dir = getpolicypath(paths.sysvol, names.dnsdomain, names.policyid) if not os.path.isdir(dir): create_gpo_struct(dir) dir = getpolicypath(paths.sysvol, names.dnsdomain, names.policyid_dc) if not os.path.isdir(dir): create_gpo_struct(dir) samdb = Ldb(paths.samdb, session_info=session, credentials=creds, lp=lp) set_gpo_acl(paths.sysvol, names.dnsdomain, names.domainsid, names.domaindn, samdb, lp) def getOEMInfo(samdb, rootdn): """Return OEM Information on the top level Samba4 use to store version info in this field :param samdb: An LDB object connect to sam.ldb :param rootdn: Root DN of the domain :return: The content of the field oEMInformation (if any)""" res = samdb.search(expression="(objectClass=*)", base=str(rootdn), scope=SCOPE_BASE, attrs=["dn", "oEMInformation"]) if len(res) > 0: info = res[0]["oEMInformation"] return info else: return "" def updateOEMInfo(samdb, names): res = samdb.search(expression="(objectClass=*)", base=str(names.rootdn), scope=SCOPE_BASE, attrs=["dn", "oEMInformation"]) if len(res) > 0: info = res[0]["oEMInformation"] info = "%s, upgrade to %s" % (info, version) delta = Message() delta.dn = Dn(samdb, str(res[0]["dn"])) delta["oEMInformation"] = MessageElement(info, FLAG_MOD_REPLACE, "oEMInformation" ) samdb.modify(delta) def setup_path(file): return os.path.join(setup_dir, file) if __name__ == '__main__': global defSDmodified defSDmodified = 0 # From here start the big steps of the program # First get files paths paths = get_paths(param, smbconf=smbconf) paths.setup = setup_dir # Get ldbs with the system session, it is needed for searching # provision parameters session = system_session() # This variable will hold the last provision USN once if it exists. minUSN = 0 ldbs = get_ldbs(paths, creds, session, lp) ldbs.startTransactions() # Guess all the needed names (variables in fact) from the current # provision. names = find_provision_key_parameters(ldbs.sam, ldbs.secrets, paths, smbconf, lp) lastProvisionUSNs = getLastProvisionUSN(ldbs.sam) if lastProvisionUSNs != None: message(CHANGE, "Find a last provision USN, %d range(s)" % len(lastProvisionUSNs)) # Objects will be created with the admin session # (not anymore system session) adm_session = admin_session(lp, str(names.domainsid)) # So we reget handle on objects # ldbs = get_ldbs(paths, creds, adm_session, lp) if not sanitychecks(ldbs.sam, names): message(SIMPLE, "Sanity checks for the upgrade fails, checks messages" \ " and correct them before rerunning upgradeprovision") sys.exit(1) # Let's see provision parameters print_provision_key_parameters(names) # 5) With all this information let's create a fresh new provision used as # reference message(SIMPLE, "Creating a reference provision") provisiondir = tempfile.mkdtemp(dir=paths.private_dir, prefix="referenceprovision") newprovision(names, setup_dir, creds, session, smbconf, provisiondir, provision_logger) # TODO # We need to get a list of object which SD is directly computed from # defaultSecurityDescriptor. # This will allow us to know which object we can rebuild the SD in case # of change of the parent's SD or of the defaultSD. # Get file paths of this new provision newpaths = get_paths(param, targetdir=provisiondir) new_ldbs = get_ldbs(newpaths, creds, session, lp) new_ldbs.startTransactions() # Populate some associative array to ease the update process # List of attribute which are link and backlink populate_links(new_ldbs.sam, names.schemadn) # List of attribute with ASN DN synthax) populate_dnsyntax(new_ldbs.sam, names.schemadn) update_privilege(newpaths.private_dir, paths.private_dir) oem = getOEMInfo(ldbs.sam, names.rootdn) # Do some modification on sam.ldb ldbs.groupedCommit() if re.match(".*alpha((9)|(\d\d+)).*", str(oem)): # Starting from alpha9 we can consider that the structure is quite ok # and that we should do only dela new_ldbs.groupedCommit() delta_update_basesamdb(newpaths, paths, creds, session, lp) ldbs.startTransactions() minUSN = get_max_usn(ldbs.sam, str(names.rootdn)) + 1 new_ldbs.startTransactions() else: simple_update_basesamdb(newpaths, paths, names) ldbs = get_ldbs(paths, creds, session, lp) ldbs.startTransactions() removeProvisionUSN(ldbs.sam) schema = Schema(setup_path, names.domainsid, schemadn=str(names.schemadn), serverdn=str(names.serverdn)) if opts.full: if not update_samdb(new_ldbs.sam, ldbs.sam, names, lastProvisionUSNs, schema): message(SIMPLE, "Rollbacking every changes. Check the reason" \ " of the problem") message(SIMPLE, "In any case your system as it was before" \ " the upgrade") ldbs.groupedRollback() new_ldbs.groupedRollback() shutil.rmtree(provisiondir) sys.exit(1) update_secrets(new_ldbs.secrets, ldbs.secrets) update_machine_account_password(ldbs.sam, ldbs.secrets, 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 ... if not re.match(r'.*alpha(9|\d\d+)', str(oem)): message(SIMPLE, "Fixing old povision SD") fix_partition_sd(ldbs.sam, names) rebuild_sd(ldbs.sam, names) # We calculate the max USN before recalculating the SD because we might # touch object that have been modified after a provision and we do not # want that the next upgradeprovision thinks that it has a green light # to modify them maxUSN = get_max_usn(ldbs.sam, str(names.rootdn)) # We rebuild SD only if defaultSecurityDescriptor is modified # But in fact we should do it also if one object has its SD modified as # child might need rebuild if defSDmodified == 1: message(SIMPLE, "Updating SD") ldbs.sam.set_session_info(adm_session) # Alpha10 was a bit broken still if re.match(r'.*alpha(\d|10)', str(oem)): fix_partition_sd(ldbs.sam, names) rebuild_sd(ldbs.sam, names) # Now we are quite confident in the recalculate process of the SD, we make # it optional. # Also the check must be done in a clever way as for the moment we just # compare SDDL if opts.debugchangesd: check_updated_sd(new_ldbs.sam, ldbs.sam, names) updateOEMInfo(ldbs.sam, names) check_for_DNS(newpaths.private_dir, paths.private_dir) if lastProvisionUSNs != None: updateProvisionUSN(ldbs.sam, minUSN, maxUSN) ldbs.groupedCommit() new_ldbs.groupedCommit() message(SIMPLE, "Upgrade finished !") # remove reference provision now that everything is done ! shutil.rmtree(provisiondir)