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re2o/ldap_sync/management/commands/ldap_rebuild.py

117 lines
4.1 KiB
Python

# Copyright © 2018 Maël Kervella
# Copyright © 2021 Hugo Levy-Falk
#
# 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 2 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, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
#
import subprocess
from base64 import decodebytes
from django.conf import settings
from django.core.management.base import BaseCommand, CommandError
from ldap_sync.models import (synchronise_serviceuser, synchronise_user,
synchronise_usergroup)
from users.models import ListRight, User
def split_lines(lines):
"""
Split LDIF lines. They can span over multiple system lines if the
following system lines begins with a space.
"""
ret = []
for line in lines.split(b"\n"):
if line.startswith(b" ") and len(ret) > 1:
ret[-1] += line[len(b" ") :]
else:
ret.append(line)
return ret
def flush_ldap(binddn, bindpass, server, usersdn, groupsdn):
"""
Perform the python (and more understandable) equivalent of the following commands:
ldapsearch -LLL -s one -D $binddn -w $bindpass -H $server -b $usersdn dn \
| grep "dn: " | sed -e 's/dn: //g' \
| ldapdelete -v -D $binddn -w $bindpass -H $server --
ldapsearch -LLL -s one -D $binddn -w $bindpass -H $server -b $usersdn dn \
| grep "dn:: " | sed -e 's/dn:: //g' \
| while read x; do echo "$x" | base64 -d; echo ""; done \
| ldapdelete -v -D $binddn -w $bindpass -H $server --
ldapsearch -LLL -s one -D $binddn -w $bindpass -H $server -b $groupsdn dn \
| grep "dn: " | sed -e 's/dn: //g' \
| ldapdelete -v -D $binddn -w $bindpass -H $server --
ldapsearch -LLL -s one -D $binddn -w $bindpass -H $server -b $groupsdn dn \
| grep "dn:: " | sed -e 's/dn:: //g' \
| while read x; do echo "$x" | base64 -d; echo ""; done \
| ldapdelete -v -D $binddn -w $bindpass -H $server --
"""
to_remove = []
for lookup in (usersdn, groupsdn):
search_cmd = [
"ldapsearch",
"-LLL",
"-s",
"one",
"-D",
binddn,
"-w",
bindpass,
"-H",
server,
"-b",
lookup,
"dn",
]
for line in split_lines(subprocess.check_output(search_cmd)):
if line.startswith(b"dn: "):
to_remove.append(line[len(b"dn: ") :])
elif line.startswith(b"dn:: "):
# Non ASCII value ares are base64-encoded
to_remove.append(decodebytes(line[len(b"dn:: ") :]))
delete_cmd = ["ldapdelete", "-D", binddn, "-w", bindpass, "-H", server] + to_remove
subprocess.check_call(delete_cmd)
def sync_ldap():
"""Syncrhonize the whole LDAP with the DB."""
for u in User.objects.all():
synchronise_user(sender=User, instance=u)
for lr in ListRight.objects.all():
synchronise_usergroup(sender=ListRight, instance=lr)
class Command(BaseCommand):
help = (
"Destroy the current LDAP data and rebuild it from the DB data."
" Use with caution."
)
def handle(self, *args, **options):
usersdn = settings.LDAP["base_user_dn"]
groupsdn = settings.LDAP["base_usergroup_dn"]
binddn = settings.DATABASES["ldap"]["USER"]
bindpass = settings.DATABASES["ldap"]["PASSWORD"]
server = settings.DATABASES["ldap"]["NAME"]
flush_ldap(binddn, bindpass, server, usersdn, groupsdn)
self.stdout.write("LDAP emptied.")
sync_ldap()
self.stdout.write("LDAP rebuilt.")