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#!/usr/bin/python
#
# Author: Nathaniel McCallum <npmccallum@redhat.com>
#
# Copyright (c) 2013 Red Hat, Inc.
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.
#
# This script tests OTP, both UDP and Unix Sockets, with a variety of
# configuration. It requires pyrad to run, but exits gracefully if not found.
# It also deliberately shuts down the test daemons between tests in order to
# test how OTP handles the case of short daemon restarts.
#
from k5test import *
from Queue import Empty
import StringIO
import struct
try:
from pyrad import packet, dictionary
from multiprocessing import Process, Queue
except ImportError:
success('Warning: skipping OTP tests due to missing pyrad or old Python')
exit(0)
class RadiusDaemon(Process):
MAX_PACKET_SIZE = 4096
# We could use a dictionary file, but since we need
# such few attributes, we'll just include them here
DICTIONARY = dictionary.Dictionary(StringIO.StringIO("""
ATTRIBUTE User-Name 1 string
ATTRIBUTE User-Password 2 string
ATTRIBUTE NAS-Identifier 32 string
"""))
def listen(self, addr):
raise NotImplementedError()
def recvRequest(self, data):
raise NotImplementedError()
def run(self):
addr = self._args[0]
secr = self._args[1]
pswd = self._args[2]
outq = self._args[3]
if secr:
with open(secr) as file:
secr = file.read().strip()
data = self.listen(addr)
outq.put("started")
(buf, sock, addr) = self.recvRequest(data)
pkt = packet.AuthPacket(secret=secr,
dict=RadiusDaemon.DICTIONARY,
packet=buf)
usernm = []
passwd = []
for key in pkt.keys():
if key == 'User-Password':
passwd = map(pkt.PwDecrypt, pkt[key])
elif key == 'User-Name':
usernm = pkt[key]
reply = pkt.CreateReply()
replyq = {'user': usernm, 'pass': passwd}
if passwd == [pswd]:
reply.code = packet.AccessAccept
replyq['reply'] = True
else:
reply.code = packet.AccessReject
replyq['reply'] = False
outq.put(replyq)
if addr is None:
sock.send(reply.ReplyPacket())
else:
sock.sendto(reply.ReplyPacket(), addr)
sock.close()
class UDPRadiusDaemon(RadiusDaemon):
def listen(self, addr):
sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
sock.bind((addr.split(':')[0], int(addr.split(':')[1])))
return sock
def recvRequest(self, sock):
(buf, addr) = sock.recvfrom(RadiusDaemon.MAX_PACKET_SIZE)
return (buf, sock, addr)
class UnixRadiusDaemon(RadiusDaemon):
def listen(self, addr):
sock = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
if os.path.exists(addr):
os.remove(addr)
sock.bind(addr)
sock.listen(1)
return (sock, addr)
def recvRequest(self, (sock, addr)):
conn = sock.accept()[0]
sock.close()
os.remove(addr)
buf = ""
remain = RadiusDaemon.MAX_PACKET_SIZE
while True:
buf += conn.recv(remain)
remain = RadiusDaemon.MAX_PACKET_SIZE - len(buf)
if (len(buf) >= 4):
remain = struct.unpack("!BBH", buf[0:4])[2] - len(buf)
if (remain <= 0):
return (buf, conn, None)
def verify(daemon, queue, reply, usernm, passwd):
try:
data = queue.get(timeout=1)
except Empty:
sys.stderr.write("ERROR: Packet not received by daemon!\n")
daemon.terminate()
sys.exit(1)
assert data['reply'] is reply
assert data['user'] == [usernm]
assert data['pass'] == [passwd]
daemon.join()
def setstr(princ, type, username=None):
cmd = 'setstr %s otp "[{""type"": ""%s""' % (princ, type)
if username is None:
cmd += '}]"'
else:
cmd += ', ""username"": ""%s""}]"' % username
return cmd
prefix = "/tmp/%d" % os.getpid()
secret_file = prefix + ".secret"
socket_file = prefix + ".socket"
with open(secret_file, "w") as file:
file.write("otptest")
atexit.register(lambda: os.remove(secret_file))
conf = {'plugins': {'kdcpreauth': {'enable_only': 'otp'}},
'otp': {'udp': {'server': '127.0.0.1:$port9',
'secret': secret_file,
'strip_realm': 'true'},
'unix': {'server': socket_file,
'strip_realm': 'false'}}}
queue = Queue()
realm = K5Realm(kdc_conf=conf)
realm.run_kadminl('modprinc +requires_preauth %s' % realm.user_princ)
flags = ['-T', realm.ccache]
server_addr = '127.0.0.1:' + str(realm.portbase + 9)
## Test UDP fail / custom username
daemon = UDPRadiusDaemon(args=(server_addr, secret_file, 'accept', queue))
daemon.start()
queue.get()
realm.run_kadminl(setstr(realm.user_princ, 'udp', 'custom'))
realm.kinit(realm.user_princ, 'reject', flags=flags, expected_code=1)
verify(daemon, queue, False, 'custom', 'reject')
## Test UDP success / standard username
daemon = UDPRadiusDaemon(args=(server_addr, secret_file, 'accept', queue))
daemon.start()
queue.get()
realm.run_kadminl(setstr(realm.user_princ, 'udp'))
realm.kinit(realm.user_princ, 'accept', flags=flags)
verify(daemon, queue, True, realm.user_princ.split('@')[0], 'accept')
# Detect upstream pyrad bug
# https://github.com/wichert/pyrad/pull/18
try:
auth = packet.Packet.CreateAuthenticator()
packet.Packet(authenticator=auth, secret="").ReplyPacket()
except AssertionError:
success('Warning: skipping UNIX domain socket tests because of pyrad '
'assertion bug')
exit(0)
## Test Unix fail / custom username
daemon = UnixRadiusDaemon(args=(socket_file, '', 'accept', queue))
daemon.start()
queue.get()
realm.run_kadminl(setstr(realm.user_princ, 'unix', 'custom'))
realm.kinit(realm.user_princ, 'reject', flags=flags, expected_code=1)
verify(daemon, queue, False, 'custom', 'reject')
## Test Unix success / standard username
daemon = UnixRadiusDaemon(args=(socket_file, '', 'accept', queue))
daemon.start()
queue.get()
realm.run_kadminl(setstr(realm.user_princ, 'unix'))
realm.kinit(realm.user_princ, 'accept', flags=flags)
verify(daemon, queue, True, realm.user_princ, 'accept')
success('OTP tests')
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