From b1dabb11333a715b0e23e91eecaf29933ea383a7 Mon Sep 17 00:00:00 2001 From: Endi Sukma Dewata Date: Wed, 9 Sep 2009 12:45:24 -0400 Subject: s4: Use SASL authentication against Fedora DS. 1. During instance creation the provisioning script will import the SASL mapping for samba-admin. It's done here due to missing config schema preventing adding the mapping via ldapi. 2. After that it will use ldif2db to import the cn=samba-admin user as the target of SASL mapping. 3. Then it will start FDS and continue to do provisioning using the Directory Manager with simple bind. 4. The SASL credentials will be stored in secrets.ldb, so when Samba server runs later it will use the SASL credentials. 5. After the provisioning is done (just before stopping the slapd) it will use the DM over direct ldapi to delete the default SASL mappings included automatically by FDS, leaving just the new samba-admin mapping. 6. Also before stopping slapd it will use the DM over direct ldapi to set the ACL on the root entries of the user, configuration, and schema partitions. The ACL will give samba-admin the full access to these partitions. Signed-off-by: Andrew Bartlett --- source4/scripting/python/samba/provision.py | 73 +++++++++++++++++++++++++++-- 1 file changed, 68 insertions(+), 5 deletions(-) (limited to 'source4/scripting') diff --git a/source4/scripting/python/samba/provision.py b/source4/scripting/python/samba/provision.py index 778271f1d5..e12d63997c 100644 --- a/source4/scripting/python/samba/provision.py +++ b/source4/scripting/python/samba/provision.py @@ -37,6 +37,7 @@ import param import registry import samba import subprocess +import ldb import shutil from credentials import Credentials, DONT_USE_KERBEROS @@ -106,6 +107,7 @@ class ProvisionPaths(object): self.memberofconf = None self.fedoradsinf = None self.fedoradspartitions = None + self.fedoradssasl = None self.olmmron = None self.olmmrserveridsconf = None self.olmmrsyncreplconf = None @@ -120,6 +122,7 @@ class ProvisionNames(object): self.domaindn = None self.configdn = None self.schemadn = None + self.sambadn = None self.ldapmanagerdn = None self.dnsdomain = None self.realm = None @@ -139,7 +142,7 @@ class ProvisionResult(object): class Schema(object): def __init__(self, setup_path, schemadn=None, - serverdn=None): + serverdn=None, sambadn=None, ldap_backend_type=None): """Load schema for the SamDB from the AD schema files and samba4_schema.ldif :param samdb: Load a schema into a SamDB. @@ -343,6 +346,10 @@ def provision_paths_from_lp(lp, dnsdomain): "fedorads.inf") paths.fedoradspartitions = os.path.join(paths.ldapdir, "fedorads-partitions.ldif") + paths.fedoradssasl = os.path.join(paths.ldapdir, + "fedorads-sasl.ldif") + paths.fedoradssamba = os.path.join(paths.ldapdir, + "fedorads-samba.ldif") paths.olmmrserveridsconf = os.path.join(paths.ldapdir, "mmr_serverids.conf") paths.olmmrsyncreplconf = os.path.join(paths.ldapdir, @@ -369,7 +376,7 @@ def provision_paths_from_lp(lp, dnsdomain): def guess_names(lp=None, hostname=None, domain=None, dnsdomain=None, serverrole=None, rootdn=None, domaindn=None, configdn=None, - schemadn=None, serverdn=None, sitename=None): + schemadn=None, serverdn=None, sitename=None, sambadn=None): """Guess configuration settings to use.""" if hostname is None: @@ -421,6 +428,8 @@ def guess_names(lp=None, hostname=None, domain=None, dnsdomain=None, configdn = "CN=Configuration," + rootdn if schemadn is None: schemadn = "CN=Schema," + configdn + if sambadn is None: + sambadn = "CN=Samba" if sitename is None: sitename=DEFAULTSITE @@ -430,6 +439,7 @@ def guess_names(lp=None, hostname=None, domain=None, dnsdomain=None, names.domaindn = domaindn names.configdn = configdn names.schemadn = schemadn + names.sambadn = sambadn names.ldapmanagerdn = "CN=Manager," + rootdn names.dnsdomain = dnsdomain names.domain = domain @@ -814,7 +824,8 @@ def setup_samdb(path, setup_path, session_info, credentials, lp, ldap_backend=ldap_backend, serverrole=serverrole) if (schema == None): - schema = Schema(setup_path, schemadn=names.schemadn, serverdn=names.serverdn) + schema = Schema(setup_path, schemadn=names.schemadn, serverdn=names.serverdn, + sambadn=names.sambadn, ldap_backend_type=ldap_backend.ldap_backend_type) # Load the database, but importantly, use Ldb not SamDB as we don't want to load the global schema samdb = Ldb(session_info=session_info, @@ -1079,7 +1090,8 @@ def provision(setup_dir, message, session_info, ldapi_url = "ldapi://%s" % urllib.quote(paths.s4_ldapi_path, safe="") - schema = Schema(setup_path, schemadn=names.schemadn, serverdn=names.serverdn) + schema = Schema(setup_path, schemadn=names.schemadn, serverdn=names.serverdn, + sambadn=names.sambadn, ldap_backend_type=ldap_backend_type) provision_backend = None if ldap_backend_type: @@ -1112,7 +1124,7 @@ def provision(setup_dir, message, session_info, message("Setting up secrets.ldb") secrets_ldb = setup_secretsdb(paths.secrets, setup_path, session_info=session_info, - credentials=credentials, lp=lp) + credentials=provision_backend.adminCredentials, lp=lp) message("Setting up the registry") setup_registry(paths.hklm, setup_path, session_info, @@ -1205,6 +1217,32 @@ def provision(setup_dir, message, session_info, message("A Kerberos configuration suitable for Samba 4 has been generated at %s" % paths.krb5conf) + ldapi_db = Ldb(provision_backend.ldapi_uri, lp=lp, credentials=credentials) + + # delete default SASL mappings + res = ldapi_db.search(expression="(!(cn=samba-admin mapping))", base="cn=mapping,cn=sasl,cn=config", scope=SCOPE_ONELEVEL, attrs=["dn"]) + + for i in range (0, len(res)): + dn = str(res[i]["dn"]) + ldapi_db.delete(dn) + + # configure aci + if ldap_backend_type == "fedora-ds": + + aci = """(targetattr = "*") (version 3.0;acl "full access to all by samba-admin";allow (all)(userdn = "ldap:///CN=samba-admin,%s");)""" % names.sambadn + + m = ldb.Message() + m["aci"] = ldb.MessageElement([aci], ldb.FLAG_MOD_REPLACE, "aci") + + m.dn = ldb.Dn(1, names.domaindn) + ldapi_db.modify(m) + + m.dn = ldb.Dn(1, names.configdn) + ldapi_db.modify(m) + + m.dn = ldb.Dn(1, names.schemadn) + ldapi_db.modify(m) + # if backend is openldap, terminate slapd after final provision and check its proper termination if provision_backend is not None and provision_backend.slapd is not None: if provision_backend.slapd.poll() is None: @@ -1379,6 +1417,12 @@ class ProvisionBackend(object): self.credentials.guess(lp) #Kerberos to an ldapi:// backend makes no sense self.credentials.set_kerberos_state(DONT_USE_KERBEROS) + + self.adminCredentials = Credentials() + self.adminCredentials.guess(lp) + #Kerberos to an ldapi:// backend makes no sense + self.adminCredentials.set_kerberos_state(DONT_USE_KERBEROS) + self.ldap_backend_type = ldap_backend_type if ldap_backend_type == "fedora-ds": @@ -1408,6 +1452,8 @@ class ProvisionBackend(object): raise ProvisioningError("Unknown LDAP backend type selected") self.credentials.set_password(ldapadminpass) + self.adminCredentials.set_username("samba-admin") + self.adminCredentials.set_password(ldapadminpass) # Now start the slapd, so we can provision onto it. We keep the # subprocess context around, to kill this off at the successful @@ -1686,6 +1732,16 @@ def provision_fds_backend(result, paths=None, setup_path=None, names=None, setup_file(setup_path("fedorads-partitions.ldif"), paths.fedoradspartitions, {"CONFIGDN": names.configdn, "SCHEMADN": names.schemadn, + "SAMBADN": names.sambadn, + }) + + setup_file(setup_path("fedorads-sasl.ldif"), paths.fedoradssasl, + {"SAMBADN": names.sambadn, + }) + + setup_file(setup_path("fedorads-samba.ldif"), paths.fedoradssamba, + {"SAMBADN": names.sambadn, + "LDAPADMINPASS": ldapadminpass }) mapping = "schema-map-fedora-ds-1.0" @@ -1726,6 +1782,13 @@ def provision_fds_backend(result, paths=None, setup_path=None, names=None, if retcode != 0: raise ProvisioningError("setup-ds failed") + # Load samba-admin + retcode = subprocess.call([ + os.path.join(paths.ldapdir, "slapd-samba4", "ldif2db"), "-s", names.sambadn, "-i", paths.fedoradssamba], + close_fds=True, shell=False) + if retcode != 0: + raise("ldib2db failed") + def create_phpldapadmin_config(path, setup_path, ldapi_uri): """Create a PHP LDAP admin configuration file. -- cgit