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# gemato: Test utility functions
# (c) 2017-2022 Michał Górny
# Licensed under the terms of 2-clause BSD license
import errno
import functools
import io
import logging
import os
import os.path
import random
import shutil
import stat
import tempfile
import threading
import unittest
import pytest
from http.server import HTTPServer, BaseHTTPRequestHandler
from urllib.parse import urlparse, parse_qs
def disallow_writes(path):
"""Mark path non-writable, recursively"""
for dirpath, dirs, files in os.walk(path, topdown=False):
for f in files + dirs:
st = os.lstat(os.path.join(dirpath, f))
if not stat.S_ISLNK(st.st_mode):
os.chmod(os.path.join(dirpath, f),
st.st_mode & ~0o222)
os.chmod(path, 0o555)
class LoggingTestCase(unittest.TestCase):
def setUp(self):
self.log = io.StringIO()
self.log_handler = logging.getLogger().addHandler(
logging.StreamHandler(self.log))
def tearDown(self):
# TODO: make some use of the log output?
logging.getLogger().removeHandler(self.log_handler)
class TempDirTestCase(LoggingTestCase):
DIRS = []
FILES = {}
def setUp(self):
super().setUp()
self.dir = tempfile.mkdtemp()
for k in self.DIRS:
os.mkdir(os.path.join(self.dir, k))
for k, v in self.FILES.items():
with open(os.path.join(self.dir, k), 'w', encoding='utf8') as f:
f.write(v)
def tearDown(self):
shutil.rmtree(self.dir)
super().tearDown()
class HKPServerRequestHandler(BaseHTTPRequestHandler):
def __init__(self, keys, *args, **kwargs):
self.keys = keys
BaseHTTPRequestHandler.__init__(self, *args, **kwargs)
def log_message(self, *args, **kwargs):
pass
def do_GET(self):
try:
parsed = urlparse(self.path)
assert parsed.path == '/pks/lookup'
qs = parse_qs(parsed.query)
assert qs.get('op') == ['get']
assert len(qs.get('search', [])) == 1
key = qs['search'][0]
assert key.startswith('0x')
key = key[2:]
except AssertionError:
self.send_error(400, "Bad request")
return
if key not in self.keys:
self.send_error(404, "Not found")
return
self.send_response(200, "OK")
self.send_header("Content-type", "application/pgp-keys")
self.end_headers()
# note: technically we should be using ASCII armor here
# but GnuPG seems happy with the binary form too
self.wfile.write(self.keys[key])
self.wfile.flush()
class HKPServer:
def __init__(self):
self.keys = {}
self.addr = None
def start(self):
# try 10 randomly selected ports before giving up
for port in random.sample(range(1024, 32768), 10):
try:
self.server = HTTPServer(
('127.0.0.1', port),
functools.partial(HKPServerRequestHandler, self.keys))
except OSError as e:
if e.errno != errno.EADDRINUSE:
pytest.skip(
f'Unable to bind the HKP server: {e}')
else:
break
else:
pytest.skip('Unable to find a free port for HKP server')
self.addr = f'hkp://127.0.0.1:{port}'
self.thread = threading.Thread(target=self.server.serve_forever)
self.thread.start()
def stop(self):
assert self.addr is not None
self.server.shutdown()
self.server.server_close()
self.thread.join()
self.addr = None
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