mirror of
https://github.com/theupdateframework/python-tuf
synced 2026-05-24 10:08:28 +00:00
251 lines
9.5 KiB
Python
251 lines
9.5 KiB
Python
#!/usr/bin/env python
|
|
|
|
# Copyright 2020, New York University and the TUF contributors
|
|
# SPDX-License-Identifier: MIT OR Apache-2.0
|
|
""" Unit tests for api/metadata.py
|
|
|
|
"""
|
|
|
|
import json
|
|
import sys
|
|
import logging
|
|
import os
|
|
import shutil
|
|
import tempfile
|
|
import unittest
|
|
|
|
from datetime import timedelta
|
|
from dateutil.relativedelta import relativedelta
|
|
|
|
# TODO: Remove case handling when fully dropping support for versions >= 3.6
|
|
IS_PY_VERSION_SUPPORTED = sys.version_info >= (3, 6)
|
|
|
|
# Use setUpModule to tell unittest runner to skip this test module gracefully.
|
|
def setUpModule():
|
|
if not IS_PY_VERSION_SUPPORTED:
|
|
raise unittest.SkipTest('requires Python 3.6 or higher')
|
|
|
|
# Since setUpModule is called after imports we need to import conditionally.
|
|
if IS_PY_VERSION_SUPPORTED:
|
|
from tuf.api.metadata import (
|
|
Metadata,
|
|
Snapshot,
|
|
Timestamp,
|
|
Targets
|
|
)
|
|
|
|
from securesystemslib.interface import (
|
|
import_ed25519_publickey_from_file,
|
|
import_ed25519_privatekey_from_file
|
|
)
|
|
|
|
logger = logging.getLogger(__name__)
|
|
|
|
|
|
class TestMetadata(unittest.TestCase):
|
|
|
|
@classmethod
|
|
def setUpClass(cls):
|
|
# Create a temporary directory to store the repository, metadata, and
|
|
# target files. 'temporary_directory' must be deleted in
|
|
# TearDownClass() so that temporary files are always removed, even when
|
|
# exceptions occur.
|
|
cls.temporary_directory = tempfile.mkdtemp(dir=os.getcwd())
|
|
|
|
test_repo_data = os.path.join(
|
|
os.path.dirname(os.path.realpath(__file__)), 'repository_data')
|
|
|
|
cls.repo_dir = os.path.join(cls.temporary_directory, 'repository')
|
|
shutil.copytree(
|
|
os.path.join(test_repo_data, 'repository'), cls.repo_dir)
|
|
|
|
cls.keystore_dir = os.path.join(cls.temporary_directory, 'keystore')
|
|
shutil.copytree(
|
|
os.path.join(test_repo_data, 'keystore'), cls.keystore_dir)
|
|
|
|
# Load keys into memory
|
|
cls.keystore = {}
|
|
for role in ['delegation', 'snapshot', 'targets', 'timestamp']:
|
|
cls.keystore[role] = {
|
|
'private': import_ed25519_privatekey_from_file(
|
|
os.path.join(cls.keystore_dir, role + '_key'),
|
|
password="password"),
|
|
'public': import_ed25519_publickey_from_file(
|
|
os.path.join(cls.keystore_dir, role + '_key.pub'))
|
|
}
|
|
|
|
|
|
@classmethod
|
|
def tearDownClass(cls):
|
|
# Remove the temporary repository directory, which should contain all
|
|
# the metadata, targets, and key files generated for the test cases.
|
|
shutil.rmtree(cls.temporary_directory)
|
|
|
|
|
|
def test_generic_read(self):
|
|
for metadata, inner_metadata_cls in [
|
|
('snapshot', Snapshot),
|
|
('timestamp', Timestamp),
|
|
('targets', Targets)]:
|
|
|
|
path = os.path.join(self.repo_dir, 'metadata', metadata + '.json')
|
|
metadata_obj = Metadata.read_from_json(path)
|
|
|
|
# Assert that generic method ...
|
|
# ... instantiates the right inner class for each metadata type
|
|
self.assertTrue(
|
|
isinstance(metadata_obj.signed, inner_metadata_cls))
|
|
# ... and reads the same metadata file as the corresponding method
|
|
# on the inner class would do (compare their dict representation)
|
|
self.assertDictEqual(
|
|
metadata_obj.as_dict(),
|
|
inner_metadata_cls.read_from_json(path).as_dict())
|
|
|
|
# Assert that it chokes correctly on an unknown metadata type
|
|
bad_metadata_path = 'bad-metadata.json'
|
|
bad_metadata = {'signed': {'_type': 'bad-metadata'}}
|
|
with open(bad_metadata_path, 'wb') as f:
|
|
f.write(json.dumps(bad_metadata).encode('utf-8'))
|
|
|
|
with self.assertRaises(ValueError):
|
|
Metadata.read_from_json(bad_metadata_path)
|
|
|
|
os.remove(bad_metadata_path)
|
|
|
|
|
|
def test_compact_json(self):
|
|
path = os.path.join(self.repo_dir, 'metadata', 'targets.json')
|
|
metadata_obj = Metadata.read_from_json(path)
|
|
self.assertTrue(
|
|
len(metadata_obj.as_json(compact=True)) <
|
|
len(metadata_obj.as_json()))
|
|
|
|
|
|
def test_read_write_read_compare(self):
|
|
for metadata in ['snapshot', 'timestamp', 'targets']:
|
|
path = os.path.join(self.repo_dir, 'metadata', metadata + '.json')
|
|
metadata_obj = Metadata.read_from_json(path)
|
|
|
|
path_2 = path + '.tmp'
|
|
metadata_obj.write_to_json(path_2)
|
|
metadata_obj_2 = Metadata.read_from_json(path_2)
|
|
|
|
self.assertDictEqual(
|
|
metadata_obj.as_dict(),
|
|
metadata_obj_2.as_dict())
|
|
|
|
os.remove(path_2)
|
|
|
|
|
|
def test_sign_verify(self):
|
|
# Load sample metadata (targets) and assert ...
|
|
path = os.path.join(self.repo_dir, 'metadata', 'targets.json')
|
|
metadata_obj = Metadata.read_from_json(path)
|
|
|
|
# ... it has a single existing signature,
|
|
self.assertTrue(len(metadata_obj.signatures) == 1)
|
|
# ... valid for the correct key, but
|
|
self.assertTrue(metadata_obj.verify(
|
|
self.keystore['targets']['public']))
|
|
# ... invalid for an unrelated key.
|
|
self.assertFalse(metadata_obj.verify(
|
|
self.keystore['snapshot']['public']))
|
|
|
|
# Append a new signature with the unrelated key and assert that ...
|
|
metadata_obj.sign(self.keystore['snapshot']['private'], append=True)
|
|
# ... there are now two signatures, and
|
|
self.assertTrue(len(metadata_obj.signatures) == 2)
|
|
# ... both are valid for the corresponding keys.
|
|
self.assertTrue(metadata_obj.verify(
|
|
self.keystore['targets']['public']))
|
|
self.assertTrue(metadata_obj.verify(
|
|
self.keystore['snapshot']['public']))
|
|
|
|
# Create and assign (don't append) a new signature and assert that ...
|
|
metadata_obj.sign(self.keystore['timestamp']['private'], append=False)
|
|
# ... there now is only one signature,
|
|
self.assertTrue(len(metadata_obj.signatures) == 1)
|
|
# ... valid for that key.
|
|
self.assertTrue(metadata_obj.verify(
|
|
self.keystore['timestamp']['public']))
|
|
|
|
|
|
# Update the metadata, invalidating the existing signature, append
|
|
# a new signature with the same key, and assert that ...
|
|
metadata_obj.signed.bump_version()
|
|
metadata_obj.sign(self.keystore['timestamp']['private'], append=True)
|
|
# ... verify returns False, because all signatures identified by a
|
|
# keyid must be valid
|
|
self.assertFalse(metadata_obj.verify(
|
|
self.keystore['timestamp']['public']))
|
|
|
|
|
|
def test_metadata_base(self):
|
|
# Use of Snapshot is arbitrary, we're just testing the base class features
|
|
# with real data
|
|
snapshot_path = os.path.join(
|
|
self.repo_dir, 'metadata', 'snapshot.json')
|
|
md = Snapshot.read_from_json(snapshot_path)
|
|
|
|
self.assertEqual(md.signed.version, 1)
|
|
md.signed.bump_version()
|
|
self.assertEqual(md.signed.version, 2)
|
|
self.assertEqual(md.signed.expires, '2030-01-01T00:00:00Z')
|
|
md.signed.bump_expiration()
|
|
self.assertEqual(md.signed.expires, '2030-01-02T00:00:00Z')
|
|
md.signed.bump_expiration(timedelta(days=365))
|
|
self.assertEqual(md.signed.expires, '2031-01-02T00:00:00Z')
|
|
|
|
|
|
def test_metadata_snapshot(self):
|
|
snapshot_path = os.path.join(
|
|
self.repo_dir, 'metadata', 'snapshot.json')
|
|
snapshot = Snapshot.read_from_json(snapshot_path)
|
|
|
|
# Create a dict representing what we expect the updated data to be
|
|
fileinfo = snapshot.signed.meta
|
|
hashes = {'sha256': 'c2986576f5fdfd43944e2b19e775453b96748ec4fe2638a6d2f32f1310967095'}
|
|
fileinfo['role1.json']['version'] = 2
|
|
fileinfo['role1.json']['hashes'] = hashes
|
|
fileinfo['role1.json']['length'] = 123
|
|
|
|
snapshot.signed.update('role1', 2, 123, hashes)
|
|
self.assertEqual(snapshot.signed.meta, fileinfo)
|
|
|
|
|
|
def test_metadata_timestamp(self):
|
|
timestamp_path = os.path.join(
|
|
self.repo_dir, 'metadata', 'timestamp.json')
|
|
timestamp = Timestamp.read_from_json(timestamp_path)
|
|
|
|
self.assertEqual(timestamp.signed.version, 1)
|
|
timestamp.signed.bump_version()
|
|
self.assertEqual(timestamp.signed.version, 2)
|
|
|
|
self.assertEqual(timestamp.signed.expires, '2030-01-01T00:00:00Z')
|
|
timestamp.signed.bump_expiration()
|
|
self.assertEqual(timestamp.signed.expires, '2030-01-02T00:00:00Z')
|
|
timestamp.signed.bump_expiration(timedelta(days=365))
|
|
self.assertEqual(timestamp.signed.expires, '2031-01-02T00:00:00Z')
|
|
|
|
# Test whether dateutil.relativedelta works, this provides a much
|
|
# easier to use interface for callers
|
|
delta = relativedelta(days=1)
|
|
timestamp.signed.bump_expiration(delta)
|
|
self.assertEqual(timestamp.signed.expires, '2031-01-03T00:00:00Z')
|
|
delta = relativedelta(years=5)
|
|
timestamp.signed.bump_expiration(delta)
|
|
self.assertEqual(timestamp.signed.expires, '2036-01-03T00:00:00Z')
|
|
|
|
hashes = {'sha256': '0ae9664468150a9aa1e7f11feecb32341658eb84292851367fea2da88e8a58dc'}
|
|
fileinfo = timestamp.signed.meta['snapshot.json']
|
|
fileinfo['hashes'] = hashes
|
|
fileinfo['version'] = 2
|
|
fileinfo['length'] = 520
|
|
timestamp.signed.update(2, 520, hashes)
|
|
self.assertEqual(timestamp.signed.meta['snapshot.json'], fileinfo)
|
|
|
|
|
|
# Run unit test.
|
|
if __name__ == '__main__':
|
|
unittest.main()
|