def test_handshake_eip8():
cancel_token = CancelToken("test_handshake_eip8")
initiator_remote = kademlia.Node(
keys.PrivateKey(eip8_values['receiver_private_key']).public_key,
kademlia.Address('0.0.0.0', 0, 0))
initiator = HandshakeInitiator(
initiator_remote,
keys.PrivateKey(eip8_values['initiator_private_key']), cancel_token)
initiator.ephemeral_privkey = keys.PrivateKey(
eip8_values['initiator_ephemeral_private_key'])
responder_remote = kademlia.Node(
keys.PrivateKey(eip8_values['initiator_private_key']).public_key,
kademlia.Address('0.0.0.0', 0, 0))
responder = HandshakeResponder(
responder_remote, keys.PrivateKey(eip8_values['receiver_private_key']),
cancel_token)
responder.ephemeral_privkey = keys.PrivateKey(
eip8_values['receiver_ephemeral_private_key'])
auth_init_ciphertext = eip8_values['auth_init_ciphertext']
# Check that we can decrypt/decode the EIP-8 auth init message.
initiator_ephemeral_pubkey, initiator_nonce, _ = decode_authentication(
auth_init_ciphertext, responder.privkey)
assert initiator_nonce == eip8_values['initiator_nonce']
assert initiator_ephemeral_pubkey == (keys.PrivateKey(
eip8_values['initiator_ephemeral_private_key']).public_key)
responder_nonce = eip8_values['receiver_nonce']
auth_ack_ciphertext = eip8_values['auth_ack_ciphertext']
aes_secret, mac_secret, _, _ = responder.derive_secrets(
initiator_nonce, responder_nonce, initiator_ephemeral_pubkey,
auth_init_ciphertext, auth_ack_ciphertext)
# Check that the secrets derived by the responder match the expected values.
assert aes_secret == eip8_values['expected_aes_secret']
assert mac_secret == eip8_values['expected_mac_secret']
responder_ephemeral_pubkey, responder_nonce = initiator.decode_auth_ack_message(
auth_ack_ciphertext)
initiator_aes_secret, initiator_mac_secret, _, _ = initiator.derive_secrets(
initiator_nonce, responder_nonce, responder_ephemeral_pubkey,
auth_init_ciphertext, auth_ack_ciphertext)
# Check that the secrets derived by the initiator match the expected values.
assert initiator_aes_secret == eip8_values['expected_aes_secret']
assert initiator_mac_secret == eip8_values['expected_mac_secret']
def _extract_nodes_from_payload(
payload: List[Tuple[str, str, str, str]]
) -> Generator[kademlia.Node, None, None]:
for item in payload:
ip, udp_port, tcp_port, node_id = item
address = kademlia.Address.from_endpoint(ip, udp_port, tcp_port)
yield kademlia.Node(keys.PublicKey(node_id), address)
def __init__(self, privkey: datatypes.PrivateKey, address: kademlia.Address,
bootstrap_nodes: List[kademlia.Node]) -> None:
self.privkey = privkey
self.address = address
self.bootstrap_nodes = bootstrap_nodes
self.this_node = kademlia.Node(self.pubkey, address)
self.kademlia = kademlia.KademliaProtocol(self.this_node, wire=self)
def get_nodes_to_connect(self):
nodekey = keys.PrivateKey(
decode_hex(
"45a915e4d060149eb4365960e6a7a45f334393093061116b197e3240065ff2d8"
))
remoteid = nodekey.public_key.to_hex()
yield kademlia.Node(keys.PublicKey(decode_hex(remoteid)),
kademlia.Address('127.0.0.1', 30303, 30303))
def __init__(self, privkey: datatypes.PrivateKey, address: kademlia.Address,
bootstrap_nodes: List[str]) -> None:
self.privkey = privkey
self.address = address
self.bootstrap_nodes = [kademlia.Node.from_uri(node) for node in bootstrap_nodes]
self.this_node = kademlia.Node(self.pubkey, address)
self.kademlia = kademlia.KademliaProtocol(self.this_node, wire=self)
self.cancel_token = CancelToken('DiscoveryProtocol')
def __init__(self, privkey: datatypes.PrivateKey,
address: kademlia.Address,
bootstrap_nodes: Tuple[kademlia.Node, ...]) -> None:
self.privkey = privkey
self.address = address
self.bootstrap_nodes = bootstrap_nodes
self.this_node = kademlia.Node(self.pubkey, address)
self.kademlia = kademlia.KademliaProtocol(self.this_node, wire=self)
self.cancel_token = CancelToken('DiscoveryProtocol')
def __init__(self, privkey: datatypes.PrivateKey,
address: kademlia.Address,
bootstrap_nodes: Tuple[kademlia.Node, ...],
cancel_token: CancelToken) -> None:
self.privkey = privkey
self.address = address
self.bootstrap_nodes = bootstrap_nodes
self.this_node = kademlia.Node(self.pubkey, address)
self.routing = kademlia.RoutingTable(self.this_node)
self.pong_callbacks = CallbackManager()
self.ping_callbacks = CallbackManager()
self.neighbours_callbacks = CallbackManager()
self.parity_pong_tokens: Dict[Hash32, Hash32] = {}
self.cancel_token = cancel_token
def receive_v5(self, address: kademlia.Address, message: bytes) -> None:
try:
remote_pubkey, cmd_id, payload, message_hash = _unpack_v5(message)
except DefectiveMessage as e:
self.logger.error('error unpacking message (%s) from %s: %s',
message, address, e)
return
cmd = CMD_ID_MAP_V5[cmd_id]
if len(payload) != cmd.elem_count:
self.logger.error('invalid %s payload: %s', cmd.name, payload)
return
node = kademlia.Node(remote_pubkey, address)
handler = self._get_handler_v5(cmd)
handler(node, payload, message_hash)
def receive(self, address: kademlia.Address, message: bytes) -> None:
try:
remote_pubkey, cmd_id, payload, message_hash = _unpack(message)
except DefectiveMessage as e:
self.logger.error('error unpacking message (%s) from %s: %s', message, address, e)
return
# As of discovery version 4, expiration is the last element for all packets, so
# we can validate that here, but if it changes we may have to do so on the
# handler methods.
expiration = rlp.sedes.big_endian_int.deserialize(payload[-1])
if time.time() > expiration:
self.logger.error('received message already expired')
return
cmd = CMD_ID_MAP[cmd_id]
if len(payload) != cmd.elem_count:
self.logger.error('invalid %s payload: %s', cmd.name, payload)
return
node = kademlia.Node(remote_pubkey, address)
handler = self._get_handler(cmd)
handler(node, payload, message_hash)
async def get_directly_linked_peers_without_handshake(peer1_class=LESPeer,
peer1_headerdb=None,
peer2_class=LESPeer,
peer2_headerdb=None):
"""See get_directly_linked_peers().
Neither the P2P handshake nor the sub-protocol handshake will be performed here.
"""
cancel_token = CancelToken("get_directly_linked_peers_without_handshake")
if peer1_headerdb is None:
peer1_headerdb = get_fresh_mainnet_headerdb()
if peer2_headerdb is None:
peer2_headerdb = get_fresh_mainnet_headerdb()
peer1_private_key = ecies.generate_privkey()
peer2_private_key = ecies.generate_privkey()
peer1_remote = kademlia.Node(peer2_private_key.public_key,
kademlia.Address('0.0.0.0', 0, 0))
peer2_remote = kademlia.Node(peer1_private_key.public_key,
kademlia.Address('0.0.0.0', 0, 0))
initiator = auth.HandshakeInitiator(peer1_remote, peer1_private_key,
cancel_token)
peer2_reader = asyncio.StreamReader()
peer1_reader = asyncio.StreamReader()
# Link the peer1's writer to the peer2's reader, and the peer2's writer to the
# peer1's reader.
peer2_writer = type("mock-streamwriter", (object, ), {
"write": peer1_reader.feed_data,
"close": lambda: None
})
peer1_writer = type("mock-streamwriter", (object, ), {
"write": peer2_reader.feed_data,
"close": lambda: None
})
peer1, peer2 = None, None
handshake_finished = asyncio.Event()
async def do_handshake():
nonlocal peer1
aes_secret, mac_secret, egress_mac, ingress_mac = await auth._handshake(
initiator, peer1_reader, peer1_writer, cancel_token)
peer1 = peer1_class(remote=peer1_remote,
privkey=peer1_private_key,
reader=peer1_reader,
writer=peer1_writer,
aes_secret=aes_secret,
mac_secret=mac_secret,
egress_mac=egress_mac,
ingress_mac=ingress_mac,
headerdb=peer1_headerdb,
network_id=1)
handshake_finished.set()
asyncio.ensure_future(do_handshake())
responder = auth.HandshakeResponder(peer2_remote, peer2_private_key,
cancel_token)
auth_cipher = await peer2_reader.read(constants.ENCRYPTED_AUTH_MSG_LEN)
initiator_ephemeral_pubkey, initiator_nonce, _ = decode_authentication(
auth_cipher, peer2_private_key)
responder_nonce = keccak(os.urandom(constants.HASH_LEN))
auth_ack_msg = responder.create_auth_ack_message(responder_nonce)
auth_ack_ciphertext = responder.encrypt_auth_ack_message(auth_ack_msg)
peer2_writer.write(auth_ack_ciphertext)
await handshake_finished.wait()
aes_secret, mac_secret, egress_mac, ingress_mac = responder.derive_secrets(
initiator_nonce, responder_nonce, initiator_ephemeral_pubkey,
auth_cipher, auth_ack_ciphertext)
assert egress_mac.digest() == peer1.ingress_mac.digest()
assert ingress_mac.digest() == peer1.egress_mac.digest()
peer2 = peer2_class(remote=peer2_remote,
privkey=peer2_private_key,
reader=peer2_reader,
writer=peer2_writer,
aes_secret=aes_secret,
mac_secret=mac_secret,
egress_mac=egress_mac,
ingress_mac=ingress_mac,
headerdb=peer2_headerdb,
network_id=1)
return peer1, peer2
async def get_directly_linked_peers_without_handshake(
alice_factory: BasePeerFactory = None,
bob_factory: BasePeerFactory = None) -> Tuple[BasePeer, BasePeer]:
"""
See get_directly_linked_peers().
Neither the P2P handshake nor the sub-protocol handshake will be performed here.
"""
cancel_token = CancelToken("get_directly_linked_peers_without_handshake")
if alice_factory is None:
alice_factory = ParagonPeerFactory(
privkey=ecies.generate_privkey(),
context=ParagonContext(),
token=cancel_token,
)
if bob_factory is None:
bob_factory = ParagonPeerFactory(
privkey=ecies.generate_privkey(),
context=ParagonContext(),
token=cancel_token,
)
alice_private_key = alice_factory.privkey
bob_private_key = bob_factory.privkey
alice_remote = kademlia.Node(bob_private_key.public_key,
kademlia.Address('0.0.0.0', 0, 0))
bob_remote = kademlia.Node(alice_private_key.public_key,
kademlia.Address('0.0.0.0', 0, 0))
use_eip8 = False
initiator = auth.HandshakeInitiator(alice_remote, alice_private_key,
use_eip8, cancel_token)
f_alice: 'asyncio.Future[BasePeer]' = asyncio.Future()
handshake_finished = asyncio.Event()
(
(alice_reader, alice_writer),
(bob_reader, bob_writer),
) = get_directly_connected_streams()
async def do_handshake() -> None:
aes_secret, mac_secret, egress_mac, ingress_mac = await auth._handshake(
initiator, alice_reader, alice_writer, cancel_token)
transport = Transport(
remote=alice_remote,
private_key=alice_factory.privkey,
reader=alice_reader,
writer=alice_writer,
aes_secret=aes_secret,
mac_secret=mac_secret,
egress_mac=egress_mac,
ingress_mac=ingress_mac,
)
alice = alice_factory.create_peer(transport)
f_alice.set_result(alice)
handshake_finished.set()
asyncio.ensure_future(do_handshake())
use_eip8 = False
responder = auth.HandshakeResponder(bob_remote, bob_private_key, use_eip8,
cancel_token)
auth_cipher = await bob_reader.read(constants.ENCRYPTED_AUTH_MSG_LEN)
initiator_ephemeral_pubkey, initiator_nonce, _ = decode_authentication(
auth_cipher, bob_private_key)
responder_nonce = keccak(os.urandom(constants.HASH_LEN))
auth_ack_msg = responder.create_auth_ack_message(responder_nonce)
auth_ack_ciphertext = responder.encrypt_auth_ack_message(auth_ack_msg)
bob_writer.write(auth_ack_ciphertext)
await handshake_finished.wait()
alice = await f_alice
aes_secret, mac_secret, egress_mac, ingress_mac = responder.derive_secrets(
initiator_nonce, responder_nonce, initiator_ephemeral_pubkey,
auth_cipher, auth_ack_ciphertext)
assert egress_mac.digest() == alice.transport._ingress_mac.digest()
assert ingress_mac.digest() == alice.transport._egress_mac.digest()
transport = Transport(
remote=bob_remote,
private_key=bob_factory.privkey,
reader=bob_reader,
writer=bob_writer,
aes_secret=aes_secret,
mac_secret=mac_secret,
egress_mac=egress_mac,
ingress_mac=ingress_mac,
)
bob = bob_factory.create_peer(transport)
return alice, bob
def random_node(nodeid=None):
address = kademlia.Address('127.0.0.1', 30303)
node = kademlia.Node(random_pubkey(), address)
if nodeid is not None:
node.id = nodeid
return node
async def test_handshake():
# TODO: this test should be re-written to not depend on functionality in the `ETHPeer` class.
cancel_token = CancelToken("test_handshake")
use_eip8 = False
initiator_remote = kademlia.Node(
keys.PrivateKey(test_values['receiver_private_key']).public_key,
kademlia.Address('0.0.0.0', 0, 0))
initiator = HandshakeInitiator(
initiator_remote,
keys.PrivateKey(test_values['initiator_private_key']), use_eip8,
cancel_token)
initiator.ephemeral_privkey = keys.PrivateKey(
test_values['initiator_ephemeral_private_key'])
responder_remote = kademlia.Node(
keys.PrivateKey(test_values['initiator_private_key']).public_key,
kademlia.Address('0.0.0.0', 0, 0))
responder = HandshakeResponder(
responder_remote, keys.PrivateKey(test_values['receiver_private_key']),
use_eip8, cancel_token)
responder.ephemeral_privkey = keys.PrivateKey(
test_values['receiver_ephemeral_private_key'])
# Check that the auth message generated by the initiator is what we expect. Notice that we
# can't use the auth_init generated here because the non-deterministic prefix would cause the
# derived secrets to not match the expected values.
_auth_init = initiator.create_auth_message(test_values['initiator_nonce'])
assert len(_auth_init) == len(test_values['auth_plaintext'])
assert _auth_init[65:] == test_values['auth_plaintext'][
65:] # starts with non deterministic k
# Check that encrypting and decrypting the auth_init gets us the orig msg.
_auth_init_ciphertext = initiator.encrypt_auth_message(_auth_init)
assert _auth_init == ecies.decrypt(_auth_init_ciphertext,
responder.privkey)
# Check that the responder correctly decodes the auth msg.
auth_msg_ciphertext = test_values['auth_ciphertext']
initiator_ephemeral_pubkey, initiator_nonce, _ = decode_authentication(
auth_msg_ciphertext, responder.privkey)
assert initiator_nonce == test_values['initiator_nonce']
assert initiator_ephemeral_pubkey == (keys.PrivateKey(
test_values['initiator_ephemeral_private_key']).public_key)
# Check that the auth_ack msg generated by the responder is what we expect.
auth_ack_msg = responder.create_auth_ack_message(
test_values['receiver_nonce'])
assert auth_ack_msg == test_values['authresp_plaintext']
# Check that the secrets derived from ephemeral key agreements match the expected values.
auth_ack_ciphertext = test_values['authresp_ciphertext']
aes_secret, mac_secret, egress_mac, ingress_mac = responder.derive_secrets(
initiator_nonce, test_values['receiver_nonce'],
initiator_ephemeral_pubkey, auth_msg_ciphertext, auth_ack_ciphertext)
assert aes_secret == test_values['aes_secret']
assert mac_secret == test_values['mac_secret']
# Test values are from initiator perspective, so they're reversed here.
assert ingress_mac.digest() == test_values['initial_egress_MAC']
assert egress_mac.digest() == test_values['initial_ingress_MAC']
# Check that the initiator secrets match as well.
responder_ephemeral_pubkey, responder_nonce = initiator.decode_auth_ack_message(
test_values['authresp_ciphertext'])
(initiator_aes_secret, initiator_mac_secret, initiator_egress_mac,
initiator_ingress_mac) = initiator.derive_secrets(
initiator_nonce, responder_nonce, responder_ephemeral_pubkey,
auth_msg_ciphertext, auth_ack_ciphertext)
assert initiator_aes_secret == aes_secret
assert initiator_mac_secret == mac_secret
assert initiator_ingress_mac.digest() == test_values['initial_ingress_MAC']
assert initiator_egress_mac.digest() == test_values['initial_egress_MAC']
# Finally, check that two Peers configured with the secrets generated above understand each
# other.
(
(responder_reader, responder_writer),
(initiator_reader, initiator_writer),
) = get_directly_connected_streams()
capabilities = (('paragon', 1), )
initiator_transport = Transport(remote=initiator_remote,
private_key=initiator.privkey,
reader=initiator_reader,
writer=initiator_writer,
aes_secret=initiator_aes_secret,
mac_secret=initiator_mac_secret,
egress_mac=initiator_egress_mac,
ingress_mac=initiator_ingress_mac)
initiator_p2p_protocol = P2PProtocolV5(initiator_transport, 0, False)
initiator_multiplexer = Multiplexer(
transport=initiator_transport,
base_protocol=initiator_p2p_protocol,
protocols=(),
)
initiator_multiplexer.get_base_protocol().send(
Hello(
HelloPayload(
client_version_string='initiator',
capabilities=capabilities,
listen_port=30303,
version=DEVP2P_V5,
remote_public_key=initiator.privkey.public_key.to_bytes(),
)))
responder_transport = Transport(
remote=responder_remote,
private_key=responder.privkey,
reader=responder_reader,
writer=responder_writer,
aes_secret=aes_secret,
mac_secret=mac_secret,
egress_mac=egress_mac,
ingress_mac=ingress_mac,
)
responder_p2p_protocol = P2PProtocolV5(responder_transport, 0, False)
responder_multiplexer = Multiplexer(
transport=responder_transport,
base_protocol=responder_p2p_protocol,
protocols=(),
)
responder_multiplexer.get_base_protocol().send(
Hello(
HelloPayload(
client_version_string='responder',
capabilities=capabilities,
listen_port=30303,
version=DEVP2P_V5,
remote_public_key=responder.privkey.public_key.to_bytes(),
)))
async with initiator_multiplexer.multiplex():
async with responder_multiplexer.multiplex():
initiator_stream = initiator_multiplexer.stream_protocol_messages(
initiator_p2p_protocol, )
responder_stream = responder_multiplexer.stream_protocol_messages(
responder_p2p_protocol, )
initiator_hello = await asyncio.wait_for(
initiator_stream.asend(None), timeout=0.1)
responder_hello = await asyncio.wait_for(
responder_stream.asend(None), timeout=0.1)
await initiator_stream.aclose()
await responder_stream.aclose()
assert isinstance(responder_hello, Hello)
assert isinstance(initiator_hello, Hello)
def test_handshake_eip8():
# Data taken from https://github.com/ethereum/EIPs/blob/master/EIPS/eip-8.md
test_values = {
"initiator_private_key":
"49a7b37aa6f6645917e7b807e9d1c00d4fa71f18343b0d4122a4d2df64dd6fee",
"receiver_private_key":
"b71c71a67e1177ad4e901695e1b4b9ee17ae16c6668d313eac2f96dbcda3f291",
"initiator_ephemeral_private_key":
"869d6ecf5211f1cc60418a13b9d870b22959d0c16f02bec714c960dd2298a32d",
"receiver_ephemeral_private_key":
"e238eb8e04fee6511ab04c6dd3c89ce097b11f25d584863ac2b6d5b35b1847e4",
"initiator_nonce":
"7e968bba13b6c50e2c4cd7f241cc0d64d1ac25c7f5952df231ac6a2bda8ee5d6",
"receiver_nonce":
"559aead08264d5795d3909718cdd05abd49572e84fe55590eef31a88a08fdffd",
}
for k, v in test_values.items():
test_values[k] = decode_hex(v)
initiator_remote = kademlia.Node(
keys.PrivateKey(test_values['receiver_private_key']).public_key,
kademlia.Address('0.0.0.0', 0, 0))
initiator = HandshakeInitiator(
initiator_remote,
keys.PrivateKey(test_values['initiator_private_key']))
initiator.ephemeral_privkey = keys.PrivateKey(
test_values['initiator_ephemeral_private_key'])
responder_remote = kademlia.Node(
keys.PrivateKey(test_values['initiator_private_key']).public_key,
kademlia.Address('0.0.0.0', 0, 0))
responder = HandshakeResponder(
responder_remote, keys.PrivateKey(test_values['receiver_private_key']))
responder.ephemeral_privkey = keys.PrivateKey(
test_values['receiver_ephemeral_private_key'])
auth_init_ciphertext = decode_hex(
"01b304ab7578555167be8154d5cc456f567d5ba302662433674222360f08d5f1534499d3678b513b"
"0fca474f3a514b18e75683032eb63fccb16c156dc6eb2c0b1593f0d84ac74f6e475f1b8d56116b84"
"9634a8c458705bf83a626ea0384d4d7341aae591fae42ce6bd5c850bfe0b999a694a49bbbaf3ef6c"
"da61110601d3b4c02ab6c30437257a6e0117792631a4b47c1d52fc0f8f89caadeb7d02770bf999cc"
"147d2df3b62e1ffb2c9d8c125a3984865356266bca11ce7d3a688663a51d82defaa8aad69da39ab6"
"d5470e81ec5f2a7a47fb865ff7cca21516f9299a07b1bc63ba56c7a1a892112841ca44b6e0034dee"
"70c9adabc15d76a54f443593fafdc3b27af8059703f88928e199cb122362a4b35f62386da7caad09"
"c001edaeb5f8a06d2b26fb6cb93c52a9fca51853b68193916982358fe1e5369e249875bb8d0d0ec3"
"6f917bc5e1eafd5896d46bd61ff23f1a863a8a8dcd54c7b109b771c8e61ec9c8908c733c0263440e"
"2aa067241aaa433f0bb053c7b31a838504b148f570c0ad62837129e547678c5190341e4f1693956c"
"3bf7678318e2d5b5340c9e488eefea198576344afbdf66db5f51204a6961a63ce072c8926c"
)
# Check that we can decrypt/decode the EIP-8 auth init message.
initiator_ephemeral_pubkey, initiator_nonce = responder.decode_authentication(
auth_init_ciphertext)
assert initiator_nonce == test_values['initiator_nonce']
assert initiator_ephemeral_pubkey == (keys.PrivateKey(
test_values['initiator_ephemeral_private_key']).public_key)
responder_nonce = test_values['receiver_nonce']
auth_ack_ciphertext = decode_hex(
"01ea0451958701280a56482929d3b0757da8f7fbe5286784beead59d95089c217c9b917788989470"
"b0e330cc6e4fb383c0340ed85fab836ec9fb8a49672712aeabbdfd1e837c1ff4cace34311cd7f4de"
"05d59279e3524ab26ef753a0095637ac88f2b499b9914b5f64e143eae548a1066e14cd2f4bd7f814"
"c4652f11b254f8a2d0191e2f5546fae6055694aed14d906df79ad3b407d94692694e259191cde171"
"ad542fc588fa2b7333313d82a9f887332f1dfc36cea03f831cb9a23fea05b33deb999e85489e645f"
"6aab1872475d488d7bd6c7c120caf28dbfc5d6833888155ed69d34dbdc39c1f299be1057810f34fb"
"e754d021bfca14dc989753d61c413d261934e1a9c67ee060a25eefb54e81a4d14baff922180c395d"
"3f998d70f46f6b58306f969627ae364497e73fc27f6d17ae45a413d322cb8814276be6ddd13b885b"
"201b943213656cde498fa0e9ddc8e0b8f8a53824fbd82254f3e2c17e8eaea009c38b4aa0a3f306e8"
"797db43c25d68e86f262e564086f59a2fc60511c42abfb3057c247a8a8fe4fb3ccbadde17514b7ac"
"8000cdb6a912778426260c47f38919a91f25f4b5ffb455d6aaaf150f7e5529c100ce62d6d92826a7"
"1778d809bdf60232ae21ce8a437eca8223f45ac37f6487452ce626f549b3b5fdee26afd2072e4bc7"
"5833c2464c805246155289f4")
aes_secret, mac_secret, _, _ = responder.derive_secrets(
initiator_nonce, responder_nonce, initiator_ephemeral_pubkey,
auth_init_ciphertext, auth_ack_ciphertext)
# Check that the secrets derived by the responder match the expected values.
expected_aes_secret = decode_hex(
"80e8632c05fed6fc2a13b0f8d31a3cf645366239170ea067065aba8e28bac487")
expected_mac_secret = decode_hex(
"2ea74ec5dae199227dff1af715362700e989d889d7a493cb0639691efb8e5f98")
assert aes_secret == expected_aes_secret
assert mac_secret == expected_mac_secret
responder_ephemeral_pubkey, responder_nonce = initiator.decode_auth_ack_message(
auth_ack_ciphertext)
initiator_aes_secret, initiator_mac_secret, _, _ = initiator.derive_secrets(
initiator_nonce, responder_nonce, responder_ephemeral_pubkey,
auth_init_ciphertext, auth_ack_ciphertext)
# Check that the secrets derived by the initiator match the expected values.
assert initiator_aes_secret == expected_aes_secret
assert initiator_mac_secret == expected_mac_secret
def random_node():
address = kademlia.Address('127.0.0.1', 30303)
return kademlia.Node(generate_privkey(), address)
def random_node():
seed = to_bytes(text="".join(random.sample(string.ascii_lowercase, 10)))
priv_key = keys.PrivateKey(keccak(seed))
return kademlia.Node(priv_key.public_key, random_address())
async def test_handshake():
# This data comes from https://gist.github.com/fjl/3a78780d17c755d22df2
test_values = {
"initiator_private_key":
"5e173f6ac3c669587538e7727cf19b782a4f2fda07c1eaa662c593e5e85e3051",
"receiver_private_key":
"c45f950382d542169ea207959ee0220ec1491755abe405cd7498d6b16adb6df8",
"initiator_ephemeral_private_key":
"19c2185f4f40634926ebed3af09070ca9e029f2edd5fae6253074896205f5f6c", # noqa: E501
"receiver_ephemeral_private_key":
"d25688cf0ab10afa1a0e2dba7853ed5f1e5bf1c631757ed4e103b593ff3f5620", # noqa: E501
"auth_plaintext":
"884c36f7ae6b406637c1f61b2f57e1d2cab813d24c6559aaf843c3f48962f32f46662c066d39669b7b2e3ba14781477417600e7728399278b1b5d801a519aa570034fdb5419558137e0d44cd13d319afe5629eeccb47fd9dfe55cc6089426e46cc762dd8a0636e07a54b31169eba0c7a20a1ac1ef68596f1f283b5c676bae4064abfcce24799d09f67e392632d3ffdc12e3d6430dcb0ea19c318343ffa7aae74d4cd26fecb93657d1cd9e9eaf4f8be720b56dd1d39f190c4e1c6b7ec66f077bb1100", # noqa: E501
"authresp_plaintext":
"802b052f8b066640bba94a4fc39d63815c377fced6fcb84d27f791c9921ddf3e9bf0108e298f490812847109cbd778fae393e80323fd643209841a3b7f110397f37ec61d84cea03dcc5e8385db93248584e8af4b4d1c832d8c7453c0089687a700", # noqa: E501
"auth_ciphertext":
"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", # noqa: E501
"authresp_ciphertext":
"049934a7b2d7f9af8fd9db941d9da281ac9381b5740e1f64f7092f3588d4f87f5ce55191a6653e5e80c1c5dd538169aa123e70dc6ffc5af1827e546c0e958e42dad355bcc1fcb9cdf2cf47ff524d2ad98cbf275e661bf4cf00960e74b5956b799771334f426df007350b46049adb21a6e78ab1408d5e6ccde6fb5e69f0f4c92bb9c725c02f99fa72b9cdc8dd53cff089e0e73317f61cc5abf6152513cb7d833f09d2851603919bf0fbe44d79a09245c6e8338eb502083dc84b846f2fee1cc310d2cc8b1b9334728f97220bb799376233e113", # noqa: E501
"ecdhe_shared_secret":
"e3f407f83fc012470c26a93fdff534100f2c6f736439ce0ca90e9914f7d1c381",
"initiator_nonce":
"cd26fecb93657d1cd9e9eaf4f8be720b56dd1d39f190c4e1c6b7ec66f077bb11",
"receiver_nonce":
"f37ec61d84cea03dcc5e8385db93248584e8af4b4d1c832d8c7453c0089687a7",
"aes_secret":
"c0458fa97a5230830e05f4f20b7c755c1d4e54b1ce5cf43260bb191eef4e418d",
"mac_secret":
"48c938884d5067a1598272fcddaa4b833cd5e7d92e8228c0ecdfabbe68aef7f1",
"token":
"3f9ec2592d1554852b1f54d228f042ed0a9310ea86d038dc2b401ba8cd7fdac4",
"initial_egress_MAC":
"09771e93b1a6109e97074cbe2d2b0cf3d3878efafe68f53c41bb60c0ec49097e",
"initial_ingress_MAC":
"75823d96e23136c89666ee025fb21a432be906512b3dd4a3049e898adb433847",
"initiator_hello_packet":
"6ef23fcf1cec7312df623f9ae701e63b550cdb8517fefd8dd398fc2acd1d935e6e0434a2b96769078477637347b7b01924fff9ff1c06df2f804df3b0402bbb9f87365b3c6856b45e1e2b6470986813c3816a71bff9d69dd297a5dbd935ab578f6e5d7e93e4506a44f307c332d95e8a4b102585fd8ef9fc9e3e055537a5cec2e9", # noqa: E501
"receiver_hello_packet":
"6ef23fcf1cec7312df623f9ae701e63be36a1cdd1b19179146019984f3625d4a6e0434a2b96769050577657247b7b02bc6c314470eca7e3ef650b98c83e9d7dd4830b3f718ff562349aead2530a8d28a8484604f92e5fced2c6183f304344ab0e7c301a0c05559f4c25db65e36820b4b909a226171a60ac6cb7beea09376d6d8" # noqa: E501
}
for k, v in test_values.items():
test_values[k] = decode_hex(v)
initiator_remote = kademlia.Node(
keys.PrivateKey(test_values['receiver_private_key']).public_key,
kademlia.Address('0.0.0.0', 0, 0))
initiator = HandshakeInitiator(
initiator_remote,
keys.PrivateKey(test_values['initiator_private_key']))
initiator.ephemeral_privkey = keys.PrivateKey(
test_values['initiator_ephemeral_private_key'])
responder_remote = kademlia.Node(
keys.PrivateKey(test_values['initiator_private_key']).public_key,
kademlia.Address('0.0.0.0', 0, 0))
responder = HandshakeResponder(
responder_remote, keys.PrivateKey(test_values['receiver_private_key']))
responder.ephemeral_privkey = keys.PrivateKey(
test_values['receiver_ephemeral_private_key'])
# Check that the auth message generated by the initiator is what we expect. Notice that we
# can't use the auth_init generated here because the non-deterministic prefix would cause the
# derived secrets to not match the expected values.
_auth_init = initiator.create_auth_message(test_values['initiator_nonce'])
assert len(_auth_init) == len(test_values['auth_plaintext'])
assert _auth_init[65:] == test_values['auth_plaintext'][
65:] # starts with non deterministic k
# Check that encrypting and decrypting the auth_init gets us the orig msg.
_auth_init_ciphertext = initiator.encrypt_auth_message(_auth_init)
assert _auth_init == ecies.decrypt(_auth_init_ciphertext,
responder.privkey)
# Check that the responder correctly decodes the auth msg.
auth_msg_ciphertext = test_values['auth_ciphertext']
initiator_ephemeral_pubkey, initiator_nonce = responder.decode_authentication(
auth_msg_ciphertext)
assert initiator_nonce == test_values['initiator_nonce']
assert initiator_ephemeral_pubkey == (keys.PrivateKey(
test_values['initiator_ephemeral_private_key']).public_key)
# Check that the auth_ack msg generated by the responder is what we expect.
auth_ack_msg = responder.create_auth_ack_message(
test_values['receiver_nonce'])
assert auth_ack_msg == test_values['authresp_plaintext']
# Check that the secrets derived from ephemeral key agreements match the expected values.
auth_ack_ciphertext = test_values['authresp_ciphertext']
aes_secret, mac_secret, egress_mac, ingress_mac = responder.derive_secrets(
initiator_nonce, test_values['receiver_nonce'],
initiator_ephemeral_pubkey, auth_msg_ciphertext, auth_ack_ciphertext)
assert aes_secret == test_values['aes_secret']
assert mac_secret == test_values['mac_secret']
# Test values are from initiator perspective, so they're reversed here.
assert ingress_mac.digest() == test_values['initial_egress_MAC']
assert egress_mac.digest() == test_values['initial_ingress_MAC']
# Check that the initiator secrets match as well.
responder_ephemeral_pubkey, responder_nonce = initiator.decode_auth_ack_message(
test_values['authresp_ciphertext'])
(initiator_aes_secret, initiator_mac_secret, initiator_egress_mac,
initiator_ingress_mac) = initiator.derive_secrets(
initiator_nonce, responder_nonce, responder_ephemeral_pubkey,
auth_msg_ciphertext, auth_ack_ciphertext)
assert initiator_aes_secret == aes_secret
assert initiator_mac_secret == mac_secret
assert initiator_ingress_mac.digest() == test_values['initial_ingress_MAC']
assert initiator_egress_mac.digest() == test_values['initial_egress_MAC']
# Finally, check that two Peers configured with the secrets generated above understand each
# other.
responder_reader = asyncio.StreamReader()
initiator_reader = asyncio.StreamReader()
# Link the initiator's writer to the responder's reader, and the responder's writer to the
# initiator's reader.
responder_writer = type("mock-streamwriter", (object, ),
{"write": initiator_reader.feed_data})
initiator_writer = type("mock-streamwriter", (object, ),
{"write": responder_reader.feed_data})
initiator_peer = DummyPeer(remote=initiator.remote,
privkey=initiator.privkey,
reader=initiator_reader,
writer=initiator_writer,
aes_secret=initiator_aes_secret,
mac_secret=initiator_mac_secret,
egress_mac=initiator_egress_mac,
ingress_mac=initiator_ingress_mac,
chaindb=None,
network_id=1)
initiator_peer.base_protocol.send_handshake()
responder_peer = DummyPeer(remote=responder.remote,
privkey=responder.privkey,
reader=responder_reader,
writer=responder_writer,
aes_secret=aes_secret,
mac_secret=mac_secret,
egress_mac=egress_mac,
ingress_mac=ingress_mac,
chaindb=None,
network_id=1)
responder_peer.base_protocol.send_handshake()
# The handshake msgs sent by each peer (above) are going to be fed directly into their remote's
# reader, and thus the read_msg() calls will return immediately.
responder_hello, _ = await responder_peer.read_msg()
initiator_hello, _ = await initiator_peer.read_msg()
assert isinstance(responder_hello, Hello)
assert isinstance(initiator_hello, Hello)
async def test_handshake_eip8():
cancel_token = CancelToken("test_handshake_eip8")
use_eip8 = True
initiator_remote = kademlia.Node(
keys.PrivateKey(eip8_values['receiver_private_key']).public_key,
kademlia.Address('0.0.0.0', 0, 0))
initiator = HandshakeInitiator(
initiator_remote,
keys.PrivateKey(eip8_values['initiator_private_key']), use_eip8,
cancel_token)
initiator.ephemeral_privkey = keys.PrivateKey(
eip8_values['initiator_ephemeral_private_key'])
responder_remote = kademlia.Node(
keys.PrivateKey(eip8_values['initiator_private_key']).public_key,
kademlia.Address('0.0.0.0', 0, 0))
responder = HandshakeResponder(
responder_remote, keys.PrivateKey(eip8_values['receiver_private_key']),
use_eip8, cancel_token)
responder.ephemeral_privkey = keys.PrivateKey(
eip8_values['receiver_ephemeral_private_key'])
auth_init_ciphertext = eip8_values['auth_init_ciphertext']
# Check that we can decrypt/decode the EIP-8 auth init message.
initiator_ephemeral_pubkey, initiator_nonce, _ = decode_authentication(
auth_init_ciphertext, responder.privkey)
assert initiator_nonce == eip8_values['initiator_nonce']
assert initiator_ephemeral_pubkey == (keys.PrivateKey(
eip8_values['initiator_ephemeral_private_key']).public_key)
responder_nonce = eip8_values['receiver_nonce']
auth_ack_ciphertext = eip8_values['auth_ack_ciphertext']
aes_secret, mac_secret, egress_mac, ingress_mac = responder.derive_secrets(
initiator_nonce, responder_nonce, initiator_ephemeral_pubkey,
auth_init_ciphertext, auth_ack_ciphertext)
# Check that the secrets derived by the responder match the expected values.
assert aes_secret == eip8_values['expected_aes_secret']
assert mac_secret == eip8_values['expected_mac_secret']
# Also according to https://github.com/ethereum/EIPs/blob/master/EIPS/eip-8.md, running B's
# ingress-mac keccak state on the string "foo" yields the following hash:
ingress_mac_copy = ingress_mac.copy()
ingress_mac_copy.update(b'foo')
assert ingress_mac_copy.hexdigest() == (
'0c7ec6340062cc46f5e9f1e3cf86f8c8c403c5a0964f5df0ebd34a75ddc86db5')
responder_ephemeral_pubkey, responder_nonce = initiator.decode_auth_ack_message(
auth_ack_ciphertext)
(initiator_aes_secret, initiator_mac_secret, initiator_egress_mac,
initiator_ingress_mac) = initiator.derive_secrets(
initiator_nonce, responder_nonce, responder_ephemeral_pubkey,
auth_init_ciphertext, auth_ack_ciphertext)
# Check that the secrets derived by the initiator match the expected values.
assert initiator_aes_secret == eip8_values['expected_aes_secret']
assert initiator_mac_secret == eip8_values['expected_mac_secret']
# Finally, check that two Peers configured with the secrets generated above understand each
# other.
responder_reader = asyncio.StreamReader()
initiator_reader = asyncio.StreamReader()
# Link the initiator's writer to the responder's reader, and the responder's writer to the
# initiator's reader.
responder_writer = MockStreamWriter(initiator_reader.feed_data)
initiator_writer = MockStreamWriter(responder_reader.feed_data)
initiator_peer = DumbPeer(remote=initiator.remote,
privkey=initiator.privkey,
reader=initiator_reader,
writer=initiator_writer,
aes_secret=initiator_aes_secret,
mac_secret=initiator_mac_secret,
egress_mac=initiator_egress_mac,
ingress_mac=initiator_ingress_mac,
headerdb=None,
network_id=1)
initiator_peer.base_protocol.send_handshake()
responder_peer = DumbPeer(remote=responder.remote,
privkey=responder.privkey,
reader=responder_reader,
writer=responder_writer,
aes_secret=aes_secret,
mac_secret=mac_secret,
egress_mac=egress_mac,
ingress_mac=ingress_mac,
headerdb=None,
network_id=1)
responder_peer.base_protocol.send_handshake()
# The handshake msgs sent by each peer (above) are going to be fed directly into their remote's
# reader, and thus the read_msg() calls will return immediately.
responder_hello, _ = await responder_peer.read_msg()
initiator_hello, _ = await initiator_peer.read_msg()
assert isinstance(responder_hello, Hello)
assert isinstance(initiator_hello, Hello)
async def test_handshake_eip8():
cancel_token = CancelToken("test_handshake_eip8")
use_eip8 = True
initiator_remote = kademlia.Node(
keys.PrivateKey(eip8_values['receiver_private_key']).public_key,
kademlia.Address('0.0.0.0', 0, 0))
initiator = HandshakeInitiator(
initiator_remote,
keys.PrivateKey(eip8_values['initiator_private_key']), use_eip8,
cancel_token)
initiator.ephemeral_privkey = keys.PrivateKey(
eip8_values['initiator_ephemeral_private_key'])
responder_remote = kademlia.Node(
keys.PrivateKey(eip8_values['initiator_private_key']).public_key,
kademlia.Address('0.0.0.0', 0, 0))
responder = HandshakeResponder(
responder_remote, keys.PrivateKey(eip8_values['receiver_private_key']),
use_eip8, cancel_token)
responder.ephemeral_privkey = keys.PrivateKey(
eip8_values['receiver_ephemeral_private_key'])
auth_init_ciphertext = eip8_values['auth_init_ciphertext']
# Check that we can decrypt/decode the EIP-8 auth init message.
initiator_ephemeral_pubkey, initiator_nonce, _ = decode_authentication(
auth_init_ciphertext, responder.privkey)
assert initiator_nonce == eip8_values['initiator_nonce']
assert initiator_ephemeral_pubkey == (keys.PrivateKey(
eip8_values['initiator_ephemeral_private_key']).public_key)
responder_nonce = eip8_values['receiver_nonce']
auth_ack_ciphertext = eip8_values['auth_ack_ciphertext']
aes_secret, mac_secret, egress_mac, ingress_mac = responder.derive_secrets(
initiator_nonce, responder_nonce, initiator_ephemeral_pubkey,
auth_init_ciphertext, auth_ack_ciphertext)
# Check that the secrets derived by the responder match the expected values.
assert aes_secret == eip8_values['expected_aes_secret']
assert mac_secret == eip8_values['expected_mac_secret']
# Also according to https://github.com/ethereum/EIPs/blob/master/EIPS/eip-8.md, running B's
# ingress-mac keccak state on the string "foo" yields the following hash:
ingress_mac_copy = ingress_mac.copy()
ingress_mac_copy.update(b'foo')
assert ingress_mac_copy.hexdigest() == (
'0c7ec6340062cc46f5e9f1e3cf86f8c8c403c5a0964f5df0ebd34a75ddc86db5')
responder_ephemeral_pubkey, responder_nonce = initiator.decode_auth_ack_message(
auth_ack_ciphertext)
(initiator_aes_secret, initiator_mac_secret, initiator_egress_mac,
initiator_ingress_mac) = initiator.derive_secrets(
initiator_nonce, responder_nonce, responder_ephemeral_pubkey,
auth_init_ciphertext, auth_ack_ciphertext)
# Check that the secrets derived by the initiator match the expected values.
assert initiator_aes_secret == eip8_values['expected_aes_secret']
assert initiator_mac_secret == eip8_values['expected_mac_secret']
# Finally, check that two Peers configured with the secrets generated above understand each
# other.
(
(responder_reader, responder_writer),
(initiator_reader, initiator_writer),
) = get_directly_connected_streams()
capabilities = (('testing', 1), )
initiator_transport = Transport(remote=initiator_remote,
private_key=initiator.privkey,
reader=initiator_reader,
writer=initiator_writer,
aes_secret=initiator_aes_secret,
mac_secret=initiator_mac_secret,
egress_mac=initiator_egress_mac,
ingress_mac=initiator_ingress_mac)
initiator_p2p_protocol = P2PProtocolV5(initiator_transport, 0, False)
initiator_multiplexer = Multiplexer(
transport=initiator_transport,
base_protocol=initiator_p2p_protocol,
protocols=(),
)
initiator_multiplexer.get_base_protocol().send(
Hello(
HelloPayload(
client_version_string='initiator',
capabilities=capabilities,
listen_port=30303,
version=DEVP2P_V5,
remote_public_key=initiator.privkey.public_key.to_bytes(),
)))
responder_transport = Transport(
remote=responder_remote,
private_key=responder.privkey,
reader=responder_reader,
writer=responder_writer,
aes_secret=aes_secret,
mac_secret=mac_secret,
egress_mac=egress_mac,
ingress_mac=ingress_mac,
)
responder_p2p_protocol = P2PProtocolV4(responder_transport, 0, False)
responder_multiplexer = Multiplexer(
transport=responder_transport,
base_protocol=responder_p2p_protocol,
protocols=(),
)
responder_multiplexer.get_base_protocol().send(
Hello(
HelloPayload(
client_version_string='responder',
capabilities=capabilities,
listen_port=30303,
version=DEVP2P_V4,
remote_public_key=responder.privkey.public_key.to_bytes(),
)))
async with initiator_multiplexer.multiplex():
async with responder_multiplexer.multiplex():
initiator_stream = initiator_multiplexer.stream_protocol_messages(
initiator_p2p_protocol, )
responder_stream = responder_multiplexer.stream_protocol_messages(
responder_p2p_protocol, )
initiator_hello = await initiator_stream.asend(None)
responder_hello = await responder_stream.asend(None)
await initiator_stream.aclose()
await responder_stream.aclose()
assert isinstance(responder_hello, Hello)
assert isinstance(initiator_hello, Hello)
async def test_handshake():
# TODO: this test should be re-written to not depend on functionality in the `ETHPeer` class.
cancel_token = CancelToken("test_handshake")
use_eip8 = False
initiator_remote = kademlia.Node(
keys.PrivateKey(test_values['receiver_private_key']).public_key,
kademlia.Address('0.0.0.0', 0, 0))
initiator = HandshakeInitiator(
initiator_remote,
keys.PrivateKey(test_values['initiator_private_key']), use_eip8,
cancel_token)
initiator.ephemeral_privkey = keys.PrivateKey(
test_values['initiator_ephemeral_private_key'])
responder_remote = kademlia.Node(
keys.PrivateKey(test_values['initiator_private_key']).public_key,
kademlia.Address('0.0.0.0', 0, 0))
responder = HandshakeResponder(
responder_remote, keys.PrivateKey(test_values['receiver_private_key']),
use_eip8, cancel_token)
responder.ephemeral_privkey = keys.PrivateKey(
test_values['receiver_ephemeral_private_key'])
# Check that the auth message generated by the initiator is what we expect. Notice that we
# can't use the auth_init generated here because the non-deterministic prefix would cause the
# derived secrets to not match the expected values.
_auth_init = initiator.create_auth_message(test_values['initiator_nonce'])
assert len(_auth_init) == len(test_values['auth_plaintext'])
assert _auth_init[65:] == test_values['auth_plaintext'][
65:] # starts with non deterministic k
# Check that encrypting and decrypting the auth_init gets us the orig msg.
_auth_init_ciphertext = initiator.encrypt_auth_message(_auth_init)
assert _auth_init == ecies.decrypt(_auth_init_ciphertext,
responder.privkey)
# Check that the responder correctly decodes the auth msg.
auth_msg_ciphertext = test_values['auth_ciphertext']
initiator_ephemeral_pubkey, initiator_nonce, _ = decode_authentication(
auth_msg_ciphertext, responder.privkey)
assert initiator_nonce == test_values['initiator_nonce']
assert initiator_ephemeral_pubkey == (keys.PrivateKey(
test_values['initiator_ephemeral_private_key']).public_key)
# Check that the auth_ack msg generated by the responder is what we expect.
auth_ack_msg = responder.create_auth_ack_message(
test_values['receiver_nonce'])
assert auth_ack_msg == test_values['authresp_plaintext']
# Check that the secrets derived from ephemeral key agreements match the expected values.
auth_ack_ciphertext = test_values['authresp_ciphertext']
aes_secret, mac_secret, egress_mac, ingress_mac = responder.derive_secrets(
initiator_nonce, test_values['receiver_nonce'],
initiator_ephemeral_pubkey, auth_msg_ciphertext, auth_ack_ciphertext)
assert aes_secret == test_values['aes_secret']
assert mac_secret == test_values['mac_secret']
# Test values are from initiator perspective, so they're reversed here.
assert ingress_mac.digest() == test_values['initial_egress_MAC']
assert egress_mac.digest() == test_values['initial_ingress_MAC']
# Check that the initiator secrets match as well.
responder_ephemeral_pubkey, responder_nonce = initiator.decode_auth_ack_message(
test_values['authresp_ciphertext'])
(initiator_aes_secret, initiator_mac_secret, initiator_egress_mac,
initiator_ingress_mac) = initiator.derive_secrets(
initiator_nonce, responder_nonce, responder_ephemeral_pubkey,
auth_msg_ciphertext, auth_ack_ciphertext)
assert initiator_aes_secret == aes_secret
assert initiator_mac_secret == mac_secret
assert initiator_ingress_mac.digest() == test_values['initial_ingress_MAC']
assert initiator_egress_mac.digest() == test_values['initial_egress_MAC']
# Finally, check that two Peers configured with the secrets generated above understand each
# other.
responder_reader = asyncio.StreamReader()
initiator_reader = asyncio.StreamReader()
# Link the initiator's writer to the responder's reader, and the responder's writer to the
# initiator's reader.
responder_writer = MockStreamWriter(initiator_reader.feed_data)
initiator_writer = MockStreamWriter(responder_reader.feed_data)
initiator_peer = DumbPeer(remote=initiator.remote,
privkey=initiator.privkey,
reader=initiator_reader,
writer=initiator_writer,
aes_secret=initiator_aes_secret,
mac_secret=initiator_mac_secret,
egress_mac=initiator_egress_mac,
ingress_mac=initiator_ingress_mac,
headerdb=None,
network_id=1)
initiator_peer.base_protocol.send_handshake()
responder_peer = DumbPeer(remote=responder.remote,
privkey=responder.privkey,
reader=responder_reader,
writer=responder_writer,
aes_secret=aes_secret,
mac_secret=mac_secret,
egress_mac=egress_mac,
ingress_mac=ingress_mac,
headerdb=None,
network_id=1)
responder_peer.base_protocol.send_handshake()
# The handshake msgs sent by each peer (above) are going to be fed directly into their remote's
# reader, and thus the read_msg() calls will return immediately.
responder_hello, _ = await responder_peer.read_msg()
initiator_hello, _ = await initiator_peer.read_msg()
assert isinstance(responder_hello, Hello)
assert isinstance(initiator_hello, Hello)
async def get_directly_linked_peers_without_handshake(peer1_class=LESPeer,
peer1_chaindb=None,
peer2_class=LESPeer,
peer2_chaindb=None):
"""See get_directly_linked_peers().
Neither the P2P handshake nor the sub-protocol handshake will be performed here.
"""
if peer1_chaindb is None:
peer1_chaindb = get_fresh_mainnet_chaindb()
if peer2_chaindb is None:
peer2_chaindb = get_fresh_mainnet_chaindb()
peer1_private_key = ecies.generate_privkey()
peer2_private_key = ecies.generate_privkey()
peer1_remote = kademlia.Node(peer2_private_key.public_key,
kademlia.Address('0.0.0.0', 0, 0))
peer2_remote = kademlia.Node(peer1_private_key.public_key,
kademlia.Address('0.0.0.0', 0, 0))
initiator = auth.HandshakeInitiator(peer1_remote, peer1_private_key)
peer2_reader = asyncio.StreamReader()
peer1_reader = asyncio.StreamReader()
# Link the peer1's writer to the peer2's reader, and the peer2's writer to the
# peer1's reader.
peer2_writer = type("mock-streamwriter", (object, ), {
"write": peer1_reader.feed_data,
"close": lambda: None
})
peer1_writer = type("mock-streamwriter", (object, ), {
"write": peer2_reader.feed_data,
"close": lambda: None
})
peer1, peer2 = None, None
handshake_finished = asyncio.Event()
async def do_handshake():
nonlocal peer1, peer2
aes_secret, mac_secret, egress_mac, ingress_mac = await auth._handshake(
initiator, peer1_reader, peer1_writer)
# Need to copy those before we pass them on to the Peer constructor because they're
# mutable. Also, the 2nd peer's ingress/egress MACs are reversed from the first peer's.
peer2_ingress = egress_mac.copy()
peer2_egress = ingress_mac.copy()
peer1 = peer1_class(remote=peer1_remote,
privkey=peer1_private_key,
reader=peer1_reader,
writer=peer1_writer,
aes_secret=aes_secret,
mac_secret=mac_secret,
egress_mac=egress_mac,
ingress_mac=ingress_mac,
chaindb=peer1_chaindb,
network_id=1)
peer2 = peer2_class(remote=peer2_remote,
privkey=peer2_private_key,
reader=peer2_reader,
writer=peer2_writer,
aes_secret=aes_secret,
mac_secret=mac_secret,
egress_mac=peer2_egress,
ingress_mac=peer2_ingress,
chaindb=peer2_chaindb,
network_id=1)
handshake_finished.set()
asyncio.ensure_future(do_handshake())
responder = auth.HandshakeResponder(peer2_remote, peer2_private_key)
auth_msg = await peer2_reader.read(constants.ENCRYPTED_AUTH_MSG_LEN)
# Can't assert return values, but checking that the decoder doesn't raise
# any exceptions at least.
_, _ = responder.decode_authentication(auth_msg)
peer2_nonce = keccak(os.urandom(constants.HASH_LEN))
auth_ack_msg = responder.create_auth_ack_message(peer2_nonce)
auth_ack_ciphertext = responder.encrypt_auth_ack_message(auth_ack_msg)
peer2_writer.write(auth_ack_ciphertext)
await handshake_finished.wait()
return peer1, peer2
