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webssh
Commit 5519a170 by Sheng
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Return 400 http error for invalid post requests

parent df26d0e6
Showing with 101 additions and 86 deletions
tests/test_app.py
......@@ -37,11 +37,13 @@ class TestApp(AsyncHTTPTestCase):
def get_app(self):
loop = self.io_loop
options.debug = True
options.debug = False
options.policy = random.choice(['warning', 'autoadd'])
options.hostFile = ''
options.sysHostFile = ''
app = make_app(make_handlers(loop, options), get_app_settings(options))
settings = get_app_settings(options)
settings.update(xsrf_cookies=False)
app = make_app(make_handlers(loop, options), settings)
return app
@classmethod
......@@ -63,7 +65,7 @@ class TestApp(AsyncHTTPTestCase):
options.update(max_body_size=max_body_size)
return options
def test_app_with_invalid_form(self):
def test_app_with_invalid_form_for_missing_argument(self):
response = self.fetch('/')
self.assertEqual(response.code, 200)
......@@ -82,44 +84,67 @@ class TestApp(AsyncHTTPTestCase):
response = self.fetch('/', method='POST', body=body)
self.assertIn(b'Missing argument username', response.body)
body = 'hostname=127.0.0.1&port=7000&username=admin'
response = self.fetch('/', method='POST', body=body)
self.assertEqual(response.code, 400)
self.assertIn(b'Missing argument password', response.body)
body = 'hostname=&port=&username=&password'
response = self.fetch('/', method='POST', body=body)
self.assertIn(b'The hostname field is required', response.body)
self.assertEqual(response.code, 400)
self.assertIn(b'Missing argument hostname', response.body)
body = 'hostname=127.0.0.1&port=&username=&password'
response = self.fetch('/', method='POST', body=body)
self.assertIn(b'The port field is required', response.body)
self.assertEqual(response.code, 400)
self.assertIn(b'Missing argument port', response.body)
body = 'hostname=127.0.0.1&port=7000&username=&password'
response = self.fetch('/', method='POST', body=body)
self.assertIn(b'The username field is required', response.body)
self.assertEqual(response.code, 400)
self.assertIn(b'Missing argument username', response.body)
def test_app_with_invalid_form_for_invalid_value(self):
body = 'hostname=127.0.0&port=22&username=&password'
response = self.fetch('/', method='POST', body=body)
self.assertIn(b'Invalid hostname', response.body)
body = 'hostname=http://www.googe.com&port=22&username=&password'
response = self.fetch('/', method='POST', body=body)
self.assertEqual(response.code, 400)
self.assertIn(b'Invalid hostname', response.body)
body = 'hostname=127.0.0.1&port=port&username=&password'
response = self.fetch('/', method='POST', body=body)
self.assertEqual(response.code, 400)
self.assertIn(b'Invalid port', response.body)
body = 'hostname=127.0.0.1&port=70000&username=&password'
response = self.fetch('/', method='POST', body=body)
self.assertEqual(response.code, 400)
self.assertIn(b'Invalid port', response.body)
def test_app_with_wrong_hostname_ip(self):
body = 'hostname=127.0.0.1&port=7000&username=admin'
response = self.fetch('/', method='POST', body=body)
self.assertEqual(response.code, 200)
self.assertIn(b'Unable to connect to', response.body)
def test_app_with_wrong_hostname_domain(self):
body = 'hostname=xxxxxxxxxxxx&port=7000&username=admin'
response = self.fetch('/', method='POST', body=body)
self.assertEqual(response.code, 200)
self.assertIn(b'Unable to connect to', response.body)
def test_app_with_wrong_port(self):
body = 'hostname=127.0.0.1&port=7000&username=admin'
response = self.fetch('/', method='POST', body=body)
self.assertEqual(response.code, 200)
self.assertIn(b'Unable to connect to', response.body)
def test_app_with_wrong_credentials(self):
response = self.fetch('/')
self.assertEqual(response.code, 200)
response = self.fetch('/', method='POST', body=self.body + 's')
self.assertIn(b'Authentication failed.', response.body)
data = json.loads(to_str(response.body))
self.assertIsNone(data['encoding'])
self.assertIsNone(data['id'])
self.assertIn('Authentication failed.', data['status'])
def test_app_with_correct_credentials(self):
response = self.fetch('/')
......@@ -192,7 +217,7 @@ class TestApp(AsyncHTTPTestCase):
self.assertIn('Missing argument id', ws.close_reason)
@tornado.testing.gen_test
def test_app_with_correct_credentials_but_epmpty_id(self):
def test_app_with_correct_credentials_but_empty_id(self):
url = self.get_url('/')
client = self.get_http_client()
response = yield client.fetch(url)
......@@ -209,7 +234,7 @@ class TestApp(AsyncHTTPTestCase):
ws = yield tornado.websocket.websocket_connect(ws_url)
msg = yield ws.read_message()
self.assertIsNone(msg)
self.assertIn('field is required', ws.close_reason)
self.assertIn('Missing argument id', ws.close_reason)
@tornado.testing.gen_test
def test_app_with_correct_credentials_but_wrong_id(self):
......@@ -345,12 +370,10 @@ class TestApp(AsyncHTTPTestCase):
headers = {
'Content-Type': content_type, 'content-length': str(len(body))
}
response = yield client.fetch(url, method='POST', headers=headers,
body=body)
data = json.loads(to_str(response.body))
self.assertIsNone(data['id'])
self.assertIsNone(data['encoding'])
self.assertTrue(data['status'].startswith('Invalid private key'))
with self.assertRaises(HTTPError) as ctx:
yield client.fetch(url, method='POST', headers=headers, body=body)
self.assertEqual(ctx.exception.code, 400)
self.assertIn('Invalid private key', ctx.exception.message)
@tornado.testing.gen_test
def test_app_auth_with_pubkey_exceeds_key_max_size(self):
......@@ -366,12 +389,10 @@ class TestApp(AsyncHTTPTestCase):
headers = {
'Content-Type': content_type, 'content-length': str(len(body))
}
response = yield client.fetch(url, method='POST', headers=headers,
body=body)
data = json.loads(to_str(response.body))
self.assertIsNone(data['id'])
self.assertIsNone(data['encoding'])
self.assertTrue(data['status'].startswith('Invalid private key'))
with self.assertRaises(HTTPError) as ctx:
yield client.fetch(url, method='POST', headers=headers, body=body)
self.assertEqual(ctx.exception.code, 400)
self.assertIn('Invalid private key', ctx.exception.message)
@tornado.testing.gen_test
def test_app_auth_with_pubkey_cannot_be_decoded_by_multipart_form(self):
......@@ -390,22 +411,10 @@ class TestApp(AsyncHTTPTestCase):
headers = {
'Content-Type': content_type, 'content-length': str(len(body))
}
with self.assertRaises(HTTPError) as exc:
with self.assertRaises(HTTPError) as ctx:
yield client.fetch(url, method='POST', headers=headers, body=body)
self.assertIn('Bad Request (Invalid unicode', exc.msg)
@tornado.testing.gen_test
def test_app_auth_with_pubkey_cannot_be_decoded_by_urlencoded_form(self):
url = self.get_url('/')
client = self.get_http_client()
response = yield client.fetch(url)
self.assertEqual(response.code, 200)
privatekey = b'h' * 1024 + b'\xb4\xed\xce\xf3'
body = self.body.encode() + b'&privatekey=' + privatekey
with self.assertRaises(HTTPError) as exc:
yield client.fetch(url, method='POST', body=body)
self.assertIn('Bad Request (Invalid unicode', exc.msg)
self.assertEqual(ctx.exception.code, 400)
self.assertIn('Invalid unicode', ctx.exception.message)
@tornado.testing.gen_test
def test_app_post_form_with_large_body_size_by_multipart_form(self):
......@@ -422,9 +431,10 @@ class TestApp(AsyncHTTPTestCase):
'Content-Type': content_type, 'content-length': str(len(body))
}
with self.assertRaises(HTTPError) as exc:
with self.assertRaises(HTTPError) as ctx:
yield client.fetch(url, method='POST', headers=headers, body=body)
self.assertIsNone(exc.msg)
self.assertEqual(ctx.exception.code, 400)
self.assertIn('Bad Request', ctx.exception.message)
@tornado.testing.gen_test
def test_app_post_form_with_large_body_size_by_urlencoded_form(self):
......@@ -435,6 +445,7 @@ class TestApp(AsyncHTTPTestCase):
privatekey = 'h' * (2 * max_body_size)
body = self.body + '&privatekey=' + privatekey
with self.assertRaises(HTTPError) as exc:
with self.assertRaises(HTTPError) as ctx:
yield client.fetch(url, method='POST', body=body)
self.assertIsNone(exc.msg)
self.assertEqual(ctx.exception.code, 400)
self.assertIn('Bad Request', ctx.exception.message)
tests/test_handler.py
......@@ -3,7 +3,9 @@ import paramiko
from tornado.httputil import HTTPServerRequest
from tests.utils import read_file, make_tests_data_path
from webssh.handler import MixinHandler, IndexHandler, parse_encoding
from webssh.handler import (
MixinHandler, IndexHandler, parse_encoding, InvalidException
)
class TestHandler(unittest.TestCase):
......@@ -70,7 +72,7 @@ class TestIndexHandler(unittest.TestCase):
pkey = IndexHandler.get_specific_pkey(cls, 'x'+key, None)
self.assertIsNone(pkey)
with self.assertRaises(ValueError):
with self.assertRaises(paramiko.PasswordRequiredException):
pkey = IndexHandler.get_specific_pkey(cls, key, None)
def test_get_pkey_obj_with_plain_key(self):
......@@ -81,7 +83,7 @@ class TestIndexHandler(unittest.TestCase):
self.assertIsInstance(pkey, cls)
pkey = IndexHandler.get_pkey_obj(key, 'iginored', fname)
self.assertIsInstance(pkey, cls)
with self.assertRaises(ValueError) as exc:
with self.assertRaises(InvalidException) as exc:
pkey = IndexHandler.get_pkey_obj('x'+key, None, fname)
self.assertIn('Invalid private key', str(exc))
......@@ -92,9 +94,9 @@ class TestIndexHandler(unittest.TestCase):
key = read_file(make_tests_data_path(fname))
pkey = IndexHandler.get_pkey_obj(key, password, fname)
self.assertIsInstance(pkey, cls)
with self.assertRaises(ValueError) as exc:
with self.assertRaises(InvalidException) as exc:
pkey = IndexHandler.get_pkey_obj(key, 'wrongpass', fname)
self.assertIn('Wrong password', str(exc))
with self.assertRaises(ValueError) as exc:
with self.assertRaises(InvalidException) as exc:
pkey = IndexHandler.get_pkey_obj('x'+key, password, fname)
self.assertIn('Invalid private key', str(exc))
webssh/handler.py
......@@ -38,20 +38,25 @@ def parse_encoding(data):
return s.strip('"').split('.')[-1]
class InvalidException(Exception):
pass
class MixinHandler(object):
def get_value(self, name):
is_required = name in self.arguments_required
def write_error(self, status_code, **kwargs):
exc_info = kwargs.get('exc_info')
if exc_info and len(exc_info) > 1:
info = str(exc_info[1])
if info:
self._reason = info.split(':', 1)[-1].strip()
super(MixinHandler, self).write_error(status_code, **kwargs)
try:
value = self.get_argument(name)
except tornado.web.MissingArgumentError:
if is_required:
raise
else:
if not value and is_required:
raise ValueError('The {} field is required.'.format(name))
return value
def get_value(self, name):
value = self.get_argument(name)
if not value:
raise tornado.web.MissingArgumentError(name)
return value
def get_real_client_addr(self):
ip = self.request.headers.get('X-Real-Ip')
......@@ -75,8 +80,6 @@ class MixinHandler(object):
class IndexHandler(MixinHandler, tornado.web.RequestHandler):
arguments_required = {'hostname', 'port', 'username', 'password'}
def initialize(self, loop, policy, host_keys_settings):
self.loop = loop
self.policy = policy
......@@ -86,14 +89,14 @@ class IndexHandler(MixinHandler, tornado.web.RequestHandler):
def get_privatekey(self):
lst = self.request.files.get('privatekey') # multipart form
if not lst:
return self.get_value('privatekey') # urlencoded form
return self.get_argument('privatekey', u'') # urlencoded form
else:
self.filename = lst[0]['filename']
data = lst[0]['body']
if len(data) > KEY_MAX_SIZE:
raise ValueError(
'Invalid private key: {}'.format(self.filename)
)
raise InvalidException(
'Invalid private key: {}'.format(self.filename)
)
return self.decode_argument(data, name=self.filename)
@classmethod
......@@ -103,7 +106,7 @@ class IndexHandler(MixinHandler, tornado.web.RequestHandler):
pkey = pkeycls.from_private_key(io.StringIO(privatekey),
password=password)
except paramiko.PasswordRequiredException:
raise ValueError('Need password to decrypt the private key.')
raise
except paramiko.SSHException:
pass
else:
......@@ -125,7 +128,7 @@ class IndexHandler(MixinHandler, tornado.web.RequestHandler):
error = (
'Wrong password {!r} for decrypting the private key.'
) .format(password)
raise ValueError(error)
raise InvalidException(error)
return pkey
......@@ -133,7 +136,7 @@ class IndexHandler(MixinHandler, tornado.web.RequestHandler):
value = self.get_value('hostname')
if not (is_valid_hostname(value) | is_valid_ipv4_address(value) |
is_valid_ipv6_address(value)):
raise ValueError('Invalid hostname: {}'.format(value))
raise InvalidException('Invalid hostname: {}'.format(value))
return value
def get_port(self):
......@@ -146,19 +149,13 @@ class IndexHandler(MixinHandler, tornado.web.RequestHandler):
if is_valid_port(port):
return port
raise ValueError('Invalid port: {}'.format(value))
def get_password(self):
try:
return self.get_value('password')
except ValueError:
return ''
raise InvalidException('Invalid port: {}'.format(value))
def get_args(self):
hostname = self.get_hostname()
port = self.get_port()
username = self.get_value('username')
password = self.get_password()
password = self.get_argument('password', u'')
privatekey = self.get_privatekey()
pkey = self.get_pkey_obj(privatekey, password, self.filename) \
if privatekey else None
......@@ -188,7 +185,11 @@ class IndexHandler(MixinHandler, tornado.web.RequestHandler):
ssh._host_keys_filename = self.host_keys_settings['host_keys_filename']
ssh.set_missing_host_key_policy(self.policy)
args = self.get_args()
try:
args = self.get_args()
except InvalidException as exc:
raise tornado.web.HTTPError(400, str(exc))
dst_addr = (args[0], args[1])
logging.info('Connecting to {}:{}'.format(*dst_addr))
......@@ -197,6 +198,8 @@ class IndexHandler(MixinHandler, tornado.web.RequestHandler):
except socket.error:
raise ValueError('Unable to connect to {}:{}'.format(*dst_addr))
except paramiko.BadAuthenticationType:
raise ValueError('Bad authentication type.')
except paramiko.AuthenticationException:
raise ValueError('Authentication failed.')
except paramiko.BadHostKeyException:
raise ValueError('Bad host key.')
......@@ -233,7 +236,7 @@ class IndexHandler(MixinHandler, tornado.web.RequestHandler):
try:
worker = yield future
except ValueError as exc:
except (ValueError, paramiko.SSHException) as exc:
status = str(exc)
else:
worker_id = worker.id
......@@ -246,8 +249,6 @@ class IndexHandler(MixinHandler, tornado.web.RequestHandler):
class WsockHandler(MixinHandler, tornado.websocket.WebSocketHandler):
arguments_required = {'id'}
def initialize(self, loop):
self.loop = loop
self.worker_ref = None
......@@ -260,8 +261,9 @@ class WsockHandler(MixinHandler, tornado.websocket.WebSocketHandler):
logging.info('Connected from {}:{}'.format(*self.src_addr))
try:
worker_id = self.get_value('id')
except (tornado.web.MissingArgumentError, ValueError) as exc:
self.close(reason=str(exc))
except tornado.web.MissingArgumentError as exc:
self.close(reason=exc.log_message)
raise
else:
worker = workers.get(worker_id)
if worker and worker.src_addr[0] == self.src_addr[0]:
......
webssh/settings.py
......@@ -36,8 +36,8 @@ def get_app_settings(options):
template_path=os.path.join(base_dir, 'webssh', 'templates'),
static_path=os.path.join(base_dir, 'webssh', 'static'),
websocket_ping_interval=options.wpIntvl,
xsrf_cookies=(not options.debug),
debug=options.debug
debug=options.debug,
xsrf_cookies=True
)
return settings
......
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