PySecretHandshake/secret_handshake/test_network.py

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# Copyright (c) 2017 PySecretHandshake contributors (see AUTHORS for more details)
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in all
# copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
# SOFTWARE.
import os
from asyncio import Event, wait_for
import pytest
from nacl.signing import SigningKey
from secret_handshake.util import AsyncBuffer
class DummyCrypto(object):
"""Dummy crypto module, pretends everything is fine."""
def verify_server_challenge(self, data):
return True
def verify_challenge(self, data):
return True
def verify_server_accept(self, data):
return True
def generate_challenge(self):
return b"CHALLENGE"
def generate_client_auth(self):
return b"AUTH"
def verify_client_auth(self, data):
return True
def generate_accept(self):
return b"ACCEPT"
def get_box_keys(self):
return {
"encrypt_key": b"x" * 32,
"encrypt_nonce": b"x" * 32,
"decrypt_key": b"x" * 32,
"decrypt_nonce": b"x" * 32,
}
def clean(self):
return
def _dummy_boxstream(stream, **kwargs):
"""Identity boxstream, no tansformation."""
return stream
def _client_stream_mocker():
reader = AsyncBuffer(b"xxx")
writer = AsyncBuffer(b"xxx")
async def _create_mock_streams(host, port):
return reader, writer
return reader, writer, _create_mock_streams
def _server_stream_mocker():
reader = AsyncBuffer(b"xxx")
writer = AsyncBuffer(b"xxx")
async def _create_mock_server(cb, host, port):
await cb(reader, writer)
return reader, writer, _create_mock_server
@pytest.mark.asyncio
async def test_client(mocker):
reader, writer, _create_mock_streams = _client_stream_mocker()
mocker.patch("asyncio.open_connection", new=_create_mock_streams)
mocker.patch("secret_handshake.boxstream.BoxStream", new=_dummy_boxstream)
mocker.patch("secret_handshake.boxstream.UnboxStream", new=_dummy_boxstream)
from secret_handshake import SHSClient
client = SHSClient("shop.local", 1111, SigningKey.generate(), os.urandom(32))
client.crypto = DummyCrypto()
await client.open()
reader.append(b"TEST")
assert (await client.read()) == b"TEST"
client.disconnect()
@pytest.mark.asyncio
async def test_server(mocker):
from secret_handshake import SHSServer
resolve = Event()
async def _on_connect(conn):
server.disconnect()
resolve.set()
reader, writer, _create_mock_server = _server_stream_mocker()
mocker.patch("asyncio.start_server", new=_create_mock_server)
mocker.patch("secret_handshake.boxstream.BoxStream", new=_dummy_boxstream)
mocker.patch("secret_handshake.boxstream.UnboxStream", new=_dummy_boxstream)
server = SHSServer("shop.local", 1111, SigningKey.generate(), os.urandom(32))
server.crypto = DummyCrypto()
server.on_connect(_on_connect)
await server.listen()
await wait_for(resolve.wait(), 5)