def connected_pair(cls,
alice: Tuple[NodeAPI, datatypes.PrivateKey],
bob: Tuple[NodeAPI, datatypes.PrivateKey],
) -> Tuple[TransportAPI, TransportAPI]:
(
(alice_reader, alice_writer),
(bob_reader, bob_writer),
) = get_directly_connected_streams()
alice_remote, alice_private_key = alice
bob_remote, bob_private_key = bob
alice_transport = cls(
alice_remote,
alice_private_key,
alice_reader,
alice_writer,
)
bob_transport = cls(bob_remote, bob_private_key, bob_reader, bob_writer)
return alice_transport, bob_transport
def connected_pair(
cls,
alice: Tuple[Node, datatypes.PrivateKey, CancelToken],
bob: Tuple[Node, datatypes.PrivateKey, CancelToken],
) -> Tuple['MemoryTransport', 'MemoryTransport']:
(
(alice_reader, alice_writer),
(bob_reader, bob_writer),
) = get_directly_connected_streams()
alice_remote, alice_private_key, alice_token = alice
bob_remote, bob_private_key, bob_token = bob
alice_transport = cls(
alice_remote,
alice_private_key,
alice_reader,
alice_writer,
alice_token,
)
bob_transport = cls(bob_remote, bob_private_key, bob_reader,
bob_writer, bob_token)
return alice_transport, bob_transport
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)
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 TransportPairFactory(
*,
alice_remote: NodeAPI = None,
alice_private_key: keys.PrivateKey = None,
bob_remote: NodeAPI = None,
bob_private_key: keys.PrivateKey = None,
token: CancelToken = None,
use_eip8: bool = False,
) -> Tuple[TransportAPI, TransportAPI]:
if token is None:
token = CancelTokenFactory(name='TransportPairFactory')
if alice_private_key is None:
alice_private_key = PrivateKeyFactory()
if alice_remote is None:
alice_remote = NodeFactory(pubkey=alice_private_key.public_key)
if bob_private_key is None:
bob_private_key = PrivateKeyFactory()
if bob_remote is None:
bob_remote = NodeFactory(pubkey=bob_private_key.public_key)
assert alice_private_key.public_key == alice_remote.pubkey
assert bob_private_key.public_key == bob_remote.pubkey
assert alice_private_key != bob_private_key
initiator = auth.HandshakeInitiator(bob_remote, alice_private_key,
use_eip8, token)
bob_peername = (bob_remote.address.ip, bob_remote.address.udp_port,
bob_remote.address.tcp_port)
alice_peername = (alice_remote.address.ip, alice_remote.address.udp_port,
alice_remote.address.tcp_port) # noqa: E501
(
(alice_reader, alice_writer),
(bob_reader, bob_writer),
) = get_directly_connected_streams(
bob_extra_info={'peername': bob_peername},
alice_extra_info={'peername': alice_peername},
)
async def establish_transport() -> TransportAPI:
aes_secret, mac_secret, egress_mac, ingress_mac = await auth._handshake(
initiator, alice_reader, alice_writer, token)
transport = Transport(
remote=alice_remote,
private_key=alice_private_key,
reader=alice_reader,
writer=alice_writer,
aes_secret=aes_secret,
mac_secret=mac_secret,
egress_mac=egress_mac,
ingress_mac=ingress_mac,
)
return transport
alice_transport, bob_transport = await asyncio.wait_for(asyncio.gather(
establish_transport(),
Transport.receive_connection(
reader=bob_reader,
writer=bob_writer,
private_key=bob_private_key,
token=token,
),
),
timeout=1)
return alice_transport, bob_transport
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()
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_peer = ParagonPeer(
transport=initiator_transport,
context=ParagonContext(),
)
initiator_peer.base_protocol.send_handshake(
client_version_string=initiator_peer.context.client_version_string,
capabilities=initiator_peer.capabilities,
listen_port=initiator_peer.context.listen_port,
)
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_peer = ParagonPeer(
transport=responder_transport,
context=ParagonContext(),
)
responder_peer.base_protocol.send_handshake(
client_version_string=responder_peer.context.client_version_string,
capabilities=responder_peer.capabilities,
listen_port=responder_peer.context.listen_port,
)
# 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()
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_peer = ParagonPeer(
transport=initiator_transport,
context=ParagonContext(),
)
initiator_peer.base_protocol.send_handshake(
client_version_string=initiator_peer.context.client_version_string,
capabilities=initiator_peer.capabilities,
listen_port=initiator_peer.context.listen_port,
)
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_peer = ParagonPeer(
transport=responder_transport,
context=ParagonContext(),
)
responder_peer.base_protocol.send_handshake(
client_version_string=responder_peer.context.client_version_string,
capabilities=responder_peer.capabilities,
listen_port=responder_peer.context.listen_port,
)
# 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)
