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"""Test libzmq security (libzmq >= 3.3.0)"""
# Copyright (C) PyZMQ Developers
# Distributed under the terms of the Modified BSD License.
import contextlib
import os
import time
from threading import Thread
import zmq
from zmq.utils import z85
from zmq_test_utils import PYPY, BaseZMQTestCase, SkipTest
USER = b"admin"
PASS = b"password"
class TestSecurity(BaseZMQTestCase):
def setUp(self):
if zmq.zmq_version_info() < (4, 0):
raise SkipTest("security is new in libzmq 4.0")
try:
zmq.curve_keypair()
except zmq.ZMQError:
raise SkipTest("security requires libzmq to be built with CURVE support")
super().setUp()
def zap_handler(self):
socket = self.context.socket(zmq.REP)
socket.bind("inproc://zeromq.zap.01")
try:
msg = self.recv_multipart(socket)
version, sequence, domain, address, identity, mechanism = msg[:6]
if mechanism == b'PLAIN':
username, password = msg[6:]
elif mechanism == b'CURVE':
msg[6]
assert version == b"1.0"
assert identity == b"IDENT"
reply = [version, sequence]
if (
mechanism == b'CURVE'
or (mechanism == b'PLAIN' and username == USER and password == PASS)
or (mechanism == b'NULL')
):
reply.extend(
[
b"200",
b"OK",
b"anonymous",
b"\5Hello\0\0\0\5World",
]
)
else:
reply.extend(
[
b"400",
b"Invalid username or password",
b"",
b"",
]
)
socket.send_multipart(reply)
finally:
socket.close()
@contextlib.contextmanager
def zap(self):
self.start_zap()
time.sleep(0.5) # allow time for the Thread to start
try:
yield
finally:
self.stop_zap()
def start_zap(self):
self.zap_thread = Thread(target=self.zap_handler)
self.zap_thread.start()
def stop_zap(self):
self.zap_thread.join()
def bounce(self, server, client, test_metadata=True):
msg = [os.urandom(64), os.urandom(64)]
client.send_multipart(msg)
frames = self.recv_multipart(server, copy=False)
recvd = list(map(lambda x: x.bytes, frames))
try:
if test_metadata and not PYPY:
for frame in frames:
assert frame.get('User-Id') == 'anonymous'
assert frame.get('Hello') == 'World'
assert frame['Socket-Type'] == 'DEALER'
except zmq.ZMQVersionError:
pass
assert recvd == msg
server.send_multipart(recvd)
msg2 = self.recv_multipart(client)
assert msg2 == msg
def test_null(self):
"""test NULL (default) security"""
server = self.socket(zmq.DEALER)
client = self.socket(zmq.DEALER)
assert client.MECHANISM == zmq.NULL
assert server.mechanism == zmq.NULL
assert client.plain_server == 0
assert server.plain_server == 0
iface = 'tcp://127.0.0.1'
port = server.bind_to_random_port(iface)
client.connect(f"{iface}:{port}")
self.bounce(server, client, False)
def test_plain(self):
"""test PLAIN authentication"""
server = self.socket(zmq.DEALER)
server.identity = b'IDENT'
client = self.socket(zmq.DEALER)
assert client.plain_username == b''
assert client.plain_password == b''
client.plain_username = USER
client.plain_password = PASS
assert client.getsockopt(zmq.PLAIN_USERNAME) == USER
assert client.getsockopt(zmq.PLAIN_PASSWORD) == PASS
assert client.plain_server == 0
assert server.plain_server == 0
server.plain_server = True
assert server.mechanism == zmq.PLAIN
assert client.mechanism == zmq.PLAIN
assert not client.plain_server
assert server.plain_server
with self.zap():
iface = 'tcp://127.0.0.1'
port = server.bind_to_random_port(iface)
client.connect(f"{iface}:{port}")
self.bounce(server, client)
def skip_plain_inauth(self):
"""test PLAIN failed authentication"""
server = self.socket(zmq.DEALER)
server.identity = b'IDENT'
client = self.socket(zmq.DEALER)
self.sockets.extend([server, client])
client.plain_username = USER
client.plain_password = b'incorrect'
server.plain_server = True
assert server.mechanism == zmq.PLAIN
assert client.mechanism == zmq.PLAIN
with self.zap():
iface = 'tcp://127.0.0.1'
port = server.bind_to_random_port(iface)
client.connect(f"{iface}:{port}")
client.send(b'ping')
server.rcvtimeo = 250
self.assertRaisesErrno(zmq.EAGAIN, server.recv)
def test_keypair(self):
"""test curve_keypair"""
try:
public, secret = zmq.curve_keypair()
except zmq.ZMQError:
raise SkipTest("CURVE unsupported")
assert type(secret) == bytes
assert type(public) == bytes
assert len(secret) == 40
assert len(public) == 40
# verify that it is indeed Z85
bsecret, bpublic = (z85.decode(key) for key in (public, secret))
assert type(bsecret) == bytes
assert type(bpublic) == bytes
assert len(bsecret) == 32
assert len(bpublic) == 32
def test_curve_public(self):
"""test curve_public"""
try:
public, secret = zmq.curve_keypair()
except zmq.ZMQError:
raise SkipTest("CURVE unsupported")
if zmq.zmq_version_info() < (4, 2):
raise SkipTest("curve_public is new in libzmq 4.2")
derived_public = zmq.curve_public(secret)
assert type(derived_public) == bytes
assert len(derived_public) == 40
# verify that it is indeed Z85
bpublic = z85.decode(derived_public)
assert type(bpublic) == bytes
assert len(bpublic) == 32
# verify that it is equal to the known public key
assert derived_public == public
def test_curve(self):
"""test CURVE encryption"""
server = self.socket(zmq.DEALER)
server.identity = b'IDENT'
client = self.socket(zmq.DEALER)
self.sockets.extend([server, client])
try:
server.curve_server = True
except zmq.ZMQError as e:
# will raise EINVAL if no CURVE support
if e.errno == zmq.EINVAL:
raise SkipTest("CURVE unsupported")
server_public, server_secret = zmq.curve_keypair()
client_public, client_secret = zmq.curve_keypair()
server.curve_secretkey = server_secret
server.curve_publickey = server_public
client.curve_serverkey = server_public
client.curve_publickey = client_public
client.curve_secretkey = client_secret
assert server.mechanism == zmq.CURVE
assert client.mechanism == zmq.CURVE
assert server.get(zmq.CURVE_SERVER)
assert not client.get(zmq.CURVE_SERVER)
with self.zap():
iface = 'tcp://127.0.0.1'
port = server.bind_to_random_port(iface)
client.connect(f"{iface}:{port}")
self.bounce(server, client)
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