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#!/usr/bin/env python
"""Synchronous server using python-gnutls"""
import sys
import os
import socket
from gnutls.crypto import *
from gnutls.connection import *
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], [crl])
sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
ssf = ServerSessionFactory(sock, cred)
ssf.bind(('0.0.0.0', 10000))
ssf.listen(100)
while True:
session, address = ssf.accept()
try:
session.handshake()
peer_cert = session.peer_certificate
try:
peer_name = peer_cert.subject
except AttributeError:
peer_name = 'Unknown'
print '\nNew connection from:', peer_name
print 'Protocol: ', session.protocol
print 'KX algorithm: ', session.kx_algorithm
print 'Cipher: ', session.cipher
print 'MAC algorithm:', session.mac_algorithm
print 'Compression: ', session.compression
session.verify_peer()
cred.check_certificate(peer_cert, cert_name='peer certificate')
except Exception, e:
print 'Handshake failed:', e
session.bye()
else:
while True:
try:
buf = session.recv(1024)
if buf == 0 or buf == '':
print "Peer has closed the session"
break
else:
if buf.strip().lower() == 'quit':
print "Got quit command, closing connection"
session.bye()
break
session.send(buf)
except Exception, e:
print "Error in reception: ", e
break
session.shutdown()
session.close()
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