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webvirtcloud/accounts/test_admin_password.py
catborise 40822e7184 fix: write the admin password file without following symlinks
In Docker, migrate runs as root while data/ belongs to www-data, so a
planted data/admin_password symlink would make root overwrite its target.
Remove any existing path first and create the file with
O_CREAT|O_EXCL|O_NOFOLLOW (mode set via fchmod). install.sh's /tmp
fallback log is now created with mktemp instead of a fixed name.
2026-10-02 23:17:32 +03:00

54 lines
2.2 KiB
Python

"""ROADMAP O-02: the generated admin password must not be printed to the log."""
import io
import os
import stat
import tempfile
from contextlib import redirect_stdout
from pathlib import Path
from unittest.mock import MagicMock, patch
from django.contrib.auth import authenticate, get_user_model
from django.test import TestCase, override_settings
from accounts.apps import create_admin
class GeneratedAdminPasswordTestCase(TestCase):
def _run_create_admin(self, base_dir):
get_user_model().objects.all().delete()
migration = MagicMock(app_label="accounts")
migration.name = "0001_initial"
out = io.StringIO()
env = {k: v for k, v in os.environ.items() if k not in ("ADMIN_PASSWORD", "ADMIN_USERNAME")}
with override_settings(BASE_DIR=Path(base_dir)), patch("sys.argv", ["manage.py", "migrate"]), patch.dict(
os.environ, env, clear=True
), redirect_stdout(out):
create_admin(sender=None, plan=[(migration, False)])
return out.getvalue()
def test_password_is_written_to_a_private_file_not_printed(self):
with tempfile.TemporaryDirectory() as tmp:
(Path(tmp) / "data").mkdir()
output = self._run_create_admin(tmp)
password_file = Path(tmp) / "data" / "admin_password"
self.assertTrue(password_file.exists())
password = password_file.read_text().strip()
self.assertEqual(stat.S_IMODE(password_file.stat().st_mode), 0o600)
self.assertNotIn(password, output)
self.assertIn(str(password_file), output)
self.assertIsNotNone(authenticate(username="admin", password=password))
def test_does_not_follow_a_planted_symlink(self):
with tempfile.TemporaryDirectory() as tmp:
(Path(tmp) / "data").mkdir()
victim = Path(tmp) / "victim"
victim.write_text("original\n")
(Path(tmp) / "data" / "admin_password").symlink_to(victim)
self._run_create_admin(tmp)
password_file = Path(tmp) / "data" / "admin_password"
self.assertEqual(victim.read_text(), "original\n")
self.assertFalse(password_file.is_symlink())
self.assertEqual(stat.S_IMODE(password_file.stat().st_mode), 0o600)