def stringReceived(self, data):
message = SecureMessage()
try:
message.populate(data)
except PopulationError:
logger.warning("Received Message discarded due to error")
return
if self.decryptOnReceive and message.encrypted:
myKey = app.keyManager.getMyKey()
message.decrypt(myKey)
if self.validateSignatureOnReceive:
if message.signed:
if not message.validateSignature():
logger.warning("Invalid Signature on received message... %s" % self)
# return
else:
logger.warning("No signature found on message, discarding...")
if logger.enabled['network']:
logger.network("\nReceived Message:\n" + message.dump(indent = 4))
logger.split()
# Call messageReceived which is to be implemented by user
self.messageReceived(message)
def _setIndex(self, message):
try:
encPair = message['pair']
cert = message['certificate']
try:
sessionKey = self.factory.authNode.sessionKeys[cert]
except KeyError:
return self.factory.fail("Requested to set index for an unregistered certificate")
pairString = sessionKey.decrypt(encPair)
try:
# logger.special(pairString)
#pairString = pairString[0:pairString.index('}')+1]
pair = json.loads(pairString)
except ValueError as e:
logger.warning("Invalid JSON as cert/index pair, discarding message...")
logger.warning(e.message, False)
return
if pair['certificate'] != cert:
logger.warning("Encrypted certificate doesn't match client's certificte, discarding message...")
return
logger.info("Index set for client")
logger.verbose("Index: %s" % pair['index'], False)
logger.verbose("Session Key: %s" % sessionKey.hex(), False)
self.factory.authNode.indices[cert] = pair['index']
logger.split()
except KeyError as e:
return self.factory.fail("Get-Session-Key no: '%s' field found in message" % e)
def _requestTable(self, message):
try:
if message.sender != 'collector':
return self.factory.fail("Unauthorized request for table by '%s'" % message.sender)
if not message.signed:
return self.factory.fail("Table Request message must be signed by collector")
if not message.validateSignature():
return self.factory.fail("Invalid signature on Table Request message")
encKey = message['encrypted-session-key']
myKey = app.keyManager.getMyKey()
keyHex = myKey.privateEncrypt(encKey)
key = SessionKey(int(keyHex, 16))
logger.debug("Received session key from collector:")
logger.debug(keyHex, False)
table = self.factory.authNode.generateTable()
encTable = key.encrypt(json.dumps(table))
message = SecureMessage()
message['encrypted-table'] = encTable
message.sign()
logger.split()
self.sendMessage(message)
except KeyError as e:
return self.factory.fail("Get-Session-Key no: '%s' field found in message" % e)
def endElections(self):
host = app.config.get("authority-host")
port = app.config.get("authority-port")
factory = AuthorityFactory(self)
logger.split()
logger.verbose("Connecting to Authority...")
reactor.connectTCP(host, port, factory)
def sendCertToAuth(self, cert):
host = app.config.get("authority-host")
port = app.config.get("authority-port")
d = Deferred()
factory = Authority2Factory(cert, d)
logger.split()
logger.verbose("Connecting to Authority...")
reactor.connectTCP(host, port, factory)
return d
def sendVoteToCollector(self):
logger.split()
self.vote = vote = raw_input("Please Enter Vote Number: ")
host = app.config.get("collector-host")
port = app.config.get("collector-port")
d = Deferred()
factory = CollectorFactory(self.sessionKey, self.vote, d)
logger.split()
logger.verbose("Connecting to Collector...")
reactor.connectTCP(host, port, factory)
return d
def initKeys():
# Initialize KeyManager
keyManager = app.keyManager
keyParser = KeyParser()
# Read public keys
keyDir = app.config.get("public-key-directory")
for f in os.listdir(keyDir):
path = os.path.join(keyDir, f)
name = f.replace('.pub', '')
key = keyParser.readPublicKey(path)
keyManager.addPublicKey(name, key)
logger.debug("Public key for '%s' read from %s" % (name, path))
# Read private key
keyPath = app.config.get("private-key-file")
key = keyParser.readPrivateKey(keyPath)
keyManager.setMyKey(key)
logger.debug("Private Key read from %s" % keyPath)
logger.split()
def initConfig(options):
# Read configurations from file
configFiles = options.config
if not configFiles and os.path.isfile('config.json'):
configFiles = ['config.json']
if not configFiles:
logger.warning("Couldn't find any configuration files")
else:
for configFile in configFiles:
logger.info("Reading configurations from '%s'" % configFile)
configReader = ConfigReader(configFile)
app.config.populate(configReader.config)
# Read extra config options
otherOptions = dict(options._get_kwargs())
for opt in acceptedOptions:
uOpt = opt.replace('-', '_')
if otherOptions[uOpt]:
app.config[opt] = otherOptions[uOpt]
logger.split();
def _getSessionKey(self, message):
try:
certificate = message['certificate']
# Create Cert
# This is not working
#cert = m2c.X509.load_cert_string(certificate)
# Stupid hack to get it working
tmp = open('.tmp.cert', 'w')
tmp.write(certificate)
tmp.close()
cert = m2c.X509.load_cert('.tmp.cert')
if not self.factory.authNode.validateCert(cert):
logger.info("Invalid Certificate received from %s" % self.transport.getPeer())
reply = SecureMessage()
reply['status'] = 'invalid'
else:
logger.verbose("Certificate validated")
reply = SecureMessage()
reply['status'] = 'ok'
sessionKey = self.factory.authNode.generateSessionKey(cert)
logger.verbose("Generated session key '%s'" % sessionKey.hex())
logger.verbose("Sending session key to client..")
publicKeyPem = cert.get_pubkey().get_rsa().as_pem()
keyParser = KeyParser()
publicKey = keyParser.parsePemPublic(publicKeyPem)
encSessionKey = publicKey.publicEncrypt(sessionKey.hex())
reply['encrypted-session-key'] = encSessionKey
logger.split()
self.sendMessage(reply.sign())
except KeyError as e:
return self.factory.fail("Get-Session-Key no: '%s' field found in message" % e)
def messageReceived(self, message):
logger.debug("Message received from Collector")
try:
if message.action == 'set-index':
index = message['index']
logger.info("Index received from Collector:")
logger.verbose(index, False)
self.factory.receivedIndex(index)
elif message.action == 'announce-results':
voteCount = message['vote-count']
myVote = message['your-vote']
mVote = None
logger.split().split()
logger.info("Election Results:")
for vote in voteCount:
if not mVote or voteCount[vote] > mVote:
mVote = voteCount[vote]
for vote in voteCount:
if voteCount[vote] == mVote:
logger.extraspecial("%5s: %s (%d)" % (vote, '#'*voteCount[vote], voteCount[vote]), False)
else:
logger.special("%5s: %s (%d)" % (vote, '#'*voteCount[vote], voteCount[vote]), False)
logger.split()
logger.info("Your Vote:")
logger.special(" Index: %s" % myVote['index'])
logger.special(" Vote: %s" % myVote['vote'])
reactor.stop()
except KeyError as e:
return self.factory.fail("Malformed message received from Collector. No '%s' field" % e)
def countVotes(self, indexTable):
logger.split()
logger.verbose("Counting votes")
logger.split()
logger.info("Election Results:", False)
logger.split()
voteCount = {}
for index in indexTable:
# index = int(ind)
key = SessionKey(int(indexTable[index], 16))
vote = key.decrypt(self.votes[index])
logger.special("%7s: %s" % (index, vote), False)
if vote in voteCount:
voteCount[vote] += 1
else:
voteCount[vote] = 1
logger.split().split()
mVote = None
for vote in voteCount:
if not mVote or voteCount[vote] > mVote:
mVote = voteCount[vote]
for vote in voteCount:
if voteCount[vote] == mVote:
logger.extraspecial("%5s: %s (%d)" % (vote, '#'*voteCount[vote], voteCount[vote]), False)
else:
logger.special("%5s: %s (%d)" % (vote, '#'*voteCount[vote], voteCount[vote]), False)
logger.split()
# Send results to clients
for client in self.clients:
client['connection'].sendResults(voteCount=voteCount, index=client['index'], vote=client['vote'])
def connectionMade(self):
logger.split()
logger.debug("Connection established with client %s" % self.transport.getPeer())
def connectionMade(self):
peer = self.transport.getPeer()
logger.split()
logger.debug("<%s:%s> Connection established" % (peer.host, peer.port))
