from samba.provision import (
provision,
ProvisioningError,
- DEFAULT_MIN_PWD_LENGTH
+ DEFAULT_MIN_PWD_LENGTH,
+ setup_path
)
from samba.provision.common import (
subcommands = {}
subcommands["expunge"] = cmd_domain_tombstones_expunge()
+class ldif_schema_update:
+ """Helper class for applying LDIF schema updates"""
+
+ def __init__(self):
+ self.is_defunct = False
+ self.unknown_oid = None
+ self.dn = None
+ self.ldif = ""
+
+ def _ldap_schemaUpdateNow(self, samdb):
+ ldif = """
+dn:
+changetype: modify
+add: schemaUpdateNow
+schemaUpdateNow: 1
+"""
+ samdb.modify_ldif(ldif)
+
+ def can_ignore_failure(self, error):
+ """Checks if we can safely ignore failure to apply an LDIF update"""
+ (num, errstr) = error.args
+
+ # Microsoft has marked objects as defunct that Samba doesn't know about
+ if num == ldb.ERR_NO_SUCH_OBJECT and self.is_defunct:
+ print("Defunct object %s doesn't exist, skipping" % self.dn)
+ return True
+ elif self.unknown_oid is not None:
+ print("Skipping unknown OID %s for object %s" %(self.unknown_oid, self.dn))
+ return True
+
+ return False
+
+ def apply(self, samdb):
+ """Applies a single LDIF update to the schema"""
+
+ try:
+ samdb.modify_ldif(self.ldif, controls=['relax:0'])
+ except ldb.LdbError as e:
+ if self.can_ignore_failure(e):
+ return 0
+ else:
+ print("Exception: %s" % e)
+ print("Encountered while trying to apply the following LDIF")
+ print("----------------------------------------------------")
+ print("%s" % self.ldif)
+
+ raise
+
+ # REFRESH AFTER EVERY CHANGE
+ # Otherwise the OID-to-attribute mapping in _apply_updates_in_file()
+ # won't work, because it can't lookup the new OID in the schema
+ self._ldap_schemaUpdateNow(samdb)
+
+ return 1
+
+class cmd_domain_schema_upgrade(Command):
+ """Domain schema upgrading"""
+
+ synopsis = "%prog [options]"
+
+ takes_optiongroups = {
+ "sambaopts": options.SambaOptions,
+ "versionopts": options.VersionOptions,
+ "credopts": options.CredentialsOptions,
+ }
+
+ takes_options = [
+ Option("-H", "--URL", help="LDB URL for database or target server", type=str,
+ metavar="URL", dest="H"),
+ Option("--quiet", help="Be quiet", action="store_true"),
+ Option("--verbose", help="Be verbose", action="store_true"),
+ Option("--schema", type="choice", metavar="SCHEMA",
+ choices=["2012", "2012_R2"],
+ help="The schema file to upgrade to. Default is (Windows) 2012_R2.",
+ default="2012_R2")
+ ]
+
+ def _apply_updates_in_file(self, samdb, ldif_file):
+ """
+ Applies a series of updates specified in an .LDIF file. The .LDIF file
+ is based on the adprep Schema updates provided by Microsoft.
+ """
+ count = 0
+ ldif_op = ldif_schema_update()
+
+ # parse the file line by line and work out each update operation to apply
+ for line in ldif_file:
+
+ line = line.rstrip()
+
+ # the operations in the .LDIF file are separated by blank lines. If
+ # we hit a blank line, try to apply the update we've parsed so far
+ if line == '':
+
+ # keep going if we haven't parsed anything yet
+ if ldif_op.ldif == '':
+ continue
+
+ # Apply the individual change
+ count += ldif_op.apply(samdb)
+
+ # start storing the next operation from scratch again
+ ldif_op = ldif_schema_update()
+ continue
+
+ # replace the placeholder domain name in the .ldif file with the real domain
+ if line.upper().endswith('DC=X'):
+ line = line[:-len('DC=X')] + str(samdb.get_default_basedn())
+ elif line.upper().endswith('CN=X'):
+ line = line[:-len('CN=X')] + str(samdb.get_default_basedn())
+
+ values = line.split(':')
+
+ if values[0].lower() == 'dn':
+ ldif_op.dn = values[1].strip()
+
+ # replace the Windows-specific operation with the Samba one
+ if values[0].lower() == 'changetype':
+ line = line.lower().replace(': ntdsschemaadd',
+ ': add')
+ line = line.lower().replace(': ntdsschemamodify',
+ ': modify')
+
+ if values[0].lower() in ['rdnattid', 'subclassof',
+ 'systemposssuperiors',
+ 'systemmaycontain',
+ 'systemauxiliaryclass']:
+ _, value = values
+
+ # The Microsoft updates contain some OIDs we don't recognize.
+ # Query the DB to see if we can work out the OID this update is
+ # referring to. If we find a match, then replace the OID with
+ # the ldapDisplayname
+ if '.' in value:
+ res = samdb.search(base=samdb.get_schema_basedn(),
+ expression="(|(attributeId=%s)(governsId=%s))" %
+ (value, value),
+ attrs=['ldapDisplayName'])
+
+ if len(res) != 1:
+ ldif_op.unknown_oid = value
+ else:
+ display_name = res[0]['ldapDisplayName'][0]
+ line = line.replace(value, ' ' + display_name)
+
+ # Microsoft has marked objects as defunct that Samba doesn't know about
+ if values[0].lower() == 'isdefunct' and values[1].strip().lower() == 'true':
+ ldif_op.is_defunct = True
+
+ # Samba has added the showInAdvancedViewOnly attribute to all objects,
+ # so rather than doing an add, we need to do a replace
+ if values[0].lower() == 'add' and values[1].strip().lower() == 'showinadvancedviewonly':
+ line = 'replace: showInAdvancedViewOnly'
+
+ # Add the line to the current LDIF operation (including the newline
+ # we stripped off at the start of the loop)
+ ldif_op.ldif += line + '\n'
+
+ return count
+
+
+ def _apply_update(self, samdb, update_file):
+ """Wrapper function for parsing an LDIF file and applying the updates"""
+
+ print("Applying %s updates..." % update_file)
+ path = setup_path('adprep')
+
+ ldif_file = None
+ try:
+ ldif_file = open(os.path.join(path, update_file))
+
+ count = self._apply_updates_in_file(samdb, ldif_file)
+
+ finally:
+ if ldif_file:
+ ldif_file.close()
+
+ print("%u changes applied" % count)
+
+ return count
+
+ def run(self, **kwargs):
+ from samba.schema import Schema
+
+ sambaopts = kwargs.get("sambaopts")
+ credopts = kwargs.get("credopts")
+ versionpts = kwargs.get("versionopts")
+ lp = sambaopts.get_loadparm()
+ creds = credopts.get_credentials(lp)
+ H = kwargs.get("H")
+ target_schema = kwargs.get("schema")
+
+ samdb = SamDB(url=H, session_info=system_session(), credentials=creds, lp=lp)
+
+ # work out the version of the target schema we're upgrading to
+ end = Schema.get_version(target_schema)
+
+ # work out the version of the schema we're currently using
+ res = samdb.search(base=samdb.get_schema_basedn(), scope=ldb.SCOPE_BASE,
+ attrs=['objectVersion'])
+
+ if len(res) != 1:
+ raise CommandError('Could not determine current schema version')
+ start = int(res[0]['objectVersion'][0]) + 1
+
+ samdb.transaction_start()
+ count = 0
+
+ try:
+ # Apply the schema updates needed to move to the new schema version
+ for version in range(start, end + 1):
+ count += self._apply_update(samdb, 'Sch%d.ldf' % version)
+
+ if count > 0:
+ samdb.transaction_commit()
+ print("Schema successfully updated")
+ else:
+ print("No changes applied to schema")
+ samdb.transaction_cancel()
+ except Exception as e:
+ print("Exception: %s" % e)
+ print("Error encountered, aborting schema upgrade")
+ samdb.transaction_cancel()
+ raise CommandError('Failed to upgrade schema')
+
class cmd_domain(SuperCommand):
"""Domain management."""
subcommands["samba3upgrade"] = cmd_domain_samba3upgrade()
subcommands["trust"] = cmd_domain_trust()
subcommands["tombstones"] = cmd_domain_tombstones()
+ subcommands["schemaupgrade"] = cmd_domain_schema_upgrade()
git.samba.org / vlendec / samba-autobuild / .git / commitdiff