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https://github.com/aljazceru/python-teos.git
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256 lines
8.7 KiB
Python
256 lines
8.7 KiB
Python
import pytest
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from uuid import uuid4
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from threading import Thread
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from queue import Queue, Empty
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from cryptography.hazmat.backends import default_backend
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from cryptography.hazmat.primitives import hashes
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from cryptography.hazmat.primitives.serialization import load_pem_private_key
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from cryptography.hazmat.primitives.asymmetric import ec
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from cryptography.exceptions import InvalidSignature
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from pisa import c_logger
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from pisa.watcher import Watcher
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from pisa.responder import Responder
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from pisa.tools import check_txid_format, bitcoin_cli
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from test.unit.conftest import generate_block, generate_blocks, generate_dummy_appointment, get_random_value_hex
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from pisa.conf import EXPIRY_DELTA, PISA_SECRET_KEY, MAX_APPOINTMENTS
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c_logger.disabled = True
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APPOINTMENTS = 5
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START_TIME_OFFSET = 1
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END_TIME_OFFSET = 1
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TEST_SET_SIZE = 200
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with open(PISA_SECRET_KEY, "r") as key_file:
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pubkey_pem = key_file.read().encode("utf-8")
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# TODO: should use the public key file instead, but it is not currently exported in the configuration
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signing_key = load_pem_private_key(pubkey_pem, password=None, backend=default_backend())
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public_key = signing_key.public_key()
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@pytest.fixture(scope="module")
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def watcher(db_manager):
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return Watcher(db_manager)
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@pytest.fixture(scope="module")
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def txids():
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return [get_random_value_hex(32) for _ in range(100)]
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@pytest.fixture(scope="module")
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def locator_uuid_map(txids):
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return {Watcher.compute_locator(txid): uuid4().hex for txid in txids}
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def create_appointments(n):
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locator_uuid_map = dict()
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appointments = dict()
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dispute_txs = []
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for i in range(n):
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appointment, dispute_tx = generate_dummy_appointment(
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start_time_offset=START_TIME_OFFSET, end_time_offset=END_TIME_OFFSET
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)
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uuid = uuid4().hex
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appointments[uuid] = appointment
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locator_uuid_map[appointment.locator] = [uuid]
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dispute_txs.append(dispute_tx)
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return appointments, locator_uuid_map, dispute_txs
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def is_signature_valid(appointment, signature, pk):
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# verify the signature
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try:
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data = appointment.serialize()
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pk.verify(signature, data, ec.ECDSA(hashes.SHA256()))
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except InvalidSignature:
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return False
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return True
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def test_init(watcher):
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assert type(watcher.appointments) is dict and len(watcher.appointments) == 0
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assert type(watcher.locator_uuid_map) is dict and len(watcher.locator_uuid_map) == 0
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assert watcher.block_queue.empty()
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assert watcher.asleep is True
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assert watcher.max_appointments == MAX_APPOINTMENTS
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assert watcher.zmq_subscriber is None
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assert type(watcher.responder) is Responder
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def test_init_no_key(db_manager):
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try:
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Watcher(db_manager, pisa_sk_file=None)
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assert False
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except ValueError:
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assert True
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def test_add_appointment(run_bitcoind, watcher):
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# The watcher automatically fires do_watch and do_subscribe on adding an appointment if it is asleep (initial state)
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# Avoid this by setting the state to awake.
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watcher.asleep = False
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# We should be able to add appointments up to the limit
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for _ in range(10):
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appointment, dispute_tx = generate_dummy_appointment(
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start_time_offset=START_TIME_OFFSET, end_time_offset=END_TIME_OFFSET
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)
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added_appointment, sig = watcher.add_appointment(appointment)
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assert added_appointment is True
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assert is_signature_valid(appointment, sig, public_key)
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# Check that we can also add an already added appointment (same locator)
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added_appointment, sig = watcher.add_appointment(appointment)
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assert added_appointment is True
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assert is_signature_valid(appointment, sig, public_key)
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def test_sign_appointment(watcher):
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appointment, _ = generate_dummy_appointment(start_time_offset=START_TIME_OFFSET, end_time_offset=END_TIME_OFFSET)
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signature = watcher.sign_appointment(appointment)
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assert is_signature_valid(appointment, signature, public_key)
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def test_add_too_many_appointments(watcher):
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# Any appointment on top of those should fail
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watcher.appointments = dict()
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for _ in range(MAX_APPOINTMENTS):
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appointment, dispute_tx = generate_dummy_appointment(
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start_time_offset=START_TIME_OFFSET, end_time_offset=END_TIME_OFFSET
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)
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added_appointment, sig = watcher.add_appointment(appointment)
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assert added_appointment is True
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assert is_signature_valid(appointment, sig, public_key)
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appointment, dispute_tx = generate_dummy_appointment(
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start_time_offset=START_TIME_OFFSET, end_time_offset=END_TIME_OFFSET
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)
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added_appointment, sig = watcher.add_appointment(appointment)
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assert added_appointment is False
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assert sig is None
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def test_do_subscribe(watcher):
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watcher.block_queue = Queue()
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zmq_thread = Thread(target=watcher.do_subscribe)
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zmq_thread.daemon = True
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zmq_thread.start()
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try:
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generate_block()
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block_hash = watcher.block_queue.get()
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assert check_txid_format(block_hash)
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except Empty:
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assert False
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def test_do_watch(watcher):
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# We will wipe all the previous data and add 5 appointments
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watcher.appointments, watcher.locator_uuid_map, dispute_txs = create_appointments(APPOINTMENTS)
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watch_thread = Thread(target=watcher.do_watch)
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watch_thread.daemon = True
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watch_thread.start()
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# Broadcast the first two
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for dispute_tx in dispute_txs[:2]:
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bitcoin_cli().sendrawtransaction(dispute_tx)
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# After leaving some time for the block to be mined and processed, the number of appointments should have reduced
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# by two
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generate_blocks(START_TIME_OFFSET + END_TIME_OFFSET)
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assert len(watcher.appointments) == APPOINTMENTS - 2
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# The rest of appointments will timeout after the end (2) + EXPIRY_DELTA
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# Wait for an additional block to be safe
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generate_blocks(EXPIRY_DELTA + START_TIME_OFFSET + END_TIME_OFFSET)
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assert len(watcher.appointments) == 0
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assert watcher.asleep is True
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def test_get_matches(watcher, txids, locator_uuid_map):
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watcher.locator_uuid_map = locator_uuid_map
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potential_matches = watcher.get_matches(txids)
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# All the txids must match
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assert locator_uuid_map.keys() == potential_matches.keys()
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def test_get_matches_random_data(watcher, locator_uuid_map):
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# The likelihood of finding a potential match with random data should be negligible
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watcher.locator_uuid_map = locator_uuid_map
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txids = [get_random_value_hex(32) for _ in range(TEST_SET_SIZE)]
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potential_matches = watcher.get_matches(txids)
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# None of the txids should match
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assert len(potential_matches) == 0
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def test_filter_valid_matches_random_data(watcher):
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appointments = {}
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locator_uuid_map = {}
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matches = {}
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for i in range(TEST_SET_SIZE):
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dummy_appointment, _ = generate_dummy_appointment()
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uuid = uuid4().hex
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appointments[uuid] = dummy_appointment
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locator_uuid_map[dummy_appointment.locator] = [uuid]
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if i % 2:
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dispute_txid = get_random_value_hex(32)
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matches[dummy_appointment.locator] = dispute_txid
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watcher.locator_uuid_map = locator_uuid_map
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watcher.appointments = appointments
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filtered_valid_matches = watcher.filter_valid_matches(matches)
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assert not any([fil_match["valid_match"] for uuid, fil_match in filtered_valid_matches.items()])
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def test_filter_valid_matches(watcher):
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dispute_txid = "0437cd7f8525ceed2324359c2d0ba26006d92d856a9c20fa0241106ee5a597c9"
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encrypted_blob = (
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"a62aa9bb3c8591e4d5de10f1bd49db92432ce2341af55762cdc9242c08662f97f5f47da0a1aa88373508cd6e67e87eefddeca0cee98c1"
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"967ec1c1ecbb4c5e8bf08aa26159214e6c0bc4b2c7c247f87e7601d15c746fc4e711be95ba0e363001280138ba9a65b06c4aa6f592b21"
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"3635ee763984d522a4c225814510c8f7ab0801f36d4a68f5ee7dd3930710005074121a172c29beba79ed647ebaf7e7fab1bbd9a208251"
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"ef5486feadf2c46e33a7d66adf9dbbc5f67b55a34b1b3c4909dd34a482d759b0bc25ecd2400f656db509466d7479b5b92a2fadabccc9e"
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"c8918da8979a9feadea27531643210368fee494d3aaa4983e05d6cf082a49105e2f8a7c7821899239ba7dee12940acd7d8a629894b5d31"
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"e94b439cfe8d2e9f21e974ae5342a70c91e8"
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)
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dummy_appointment, _ = generate_dummy_appointment()
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dummy_appointment.encrypted_blob.data = encrypted_blob
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dummy_appointment.locator = Watcher.compute_locator(dispute_txid)
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uuid = uuid4().hex
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appointments = {uuid: dummy_appointment}
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locator_uuid_map = {dummy_appointment.locator: [uuid]}
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matches = {dummy_appointment.locator: dispute_txid}
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watcher.appointments = appointments
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watcher.locator_uuid_map = locator_uuid_map
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filtered_valid_matches = watcher.filter_valid_matches(matches)
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assert all([fil_match["valid_match"] for uuid, fil_match in filtered_valid_matches.items()])
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