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#!/usr/bin/env python
"""Asynchronous client using Twisted with GNUTLS"""
import sys
import os
from twisted.internet.protocol import ClientFactory
from twisted.protocols.basic import LineOnlyReceiver
from twisted.internet import reactor
from gnutls.constants import *
from gnutls.crypto import *
from gnutls.errors import *
from gnutls.interfaces.twisted import X509Credentials
class EchoProtocol(LineOnlyReceiver):
def connectionMade(self):
self.sendLine('echo')
def lineReceived(self, line):
print 'received: ', line
self.transport.loseConnection()
def connectionLost(self, reason):
reactor.stop()
class EchoFactory(ClientFactory):
protocol = EchoProtocol
def clientConnectionFailed(self, connector, err):
print err.value
reactor.stop()
script_path = os.path.realpath(os.path.dirname(sys.argv[0]))
certs_path = os.path.join(script_path, 'certs')
cert = X509Certificate(open(certs_path + '/valid.crt').read())
key = X509PrivateKey(open(certs_path + '/valid.key').read())
ca = X509Certificate(open(certs_path + '/ca.pem').read())
crl = X509CRL(open(certs_path + '/crl.pem').read())
cred = X509Credentials(cert, key, [ca])
cred.verify_peer = True
reactor.connectTLS('localhost', 10000, EchoFactory(), cred)
reactor.run()
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