"""
Simple echo server, using nonblocking I/O
"""
from OpenSSL import SSL
import sys, os, select, socket
def verify_cb(conn, cert, errnum, depth, ok):
print 'Got certificate: %s' % cert.get_subject()
return ok
if len(sys.argv) < 2:
print 'Usage: python[2] server.py PORT'
sys.exit(1)
dir = os.path.dirname(sys.argv[0])
if dir == '':
dir = os.curdir
ctx = SSL.Context(SSL.SSLv23_METHOD)
ctx.set_options(SSL.OP_NO_SSLv2)
ctx.set_verify(SSL.VERIFY_PEER|SSL.VERIFY_FAIL_IF_NO_PEER_CERT, verify_cb) ctx.use_privatekey_file (os.path.join(dir, 'server.pkey'))
ctx.use_certificate_file(os.path.join(dir, 'server.cert'))
ctx.load_verify_locations(os.path.join(dir, 'CA.cert'))
server = SSL.Connection(ctx, socket.socket(socket.AF_INET, socket.SOCK_STREAM))
server.bind(('', int(sys.argv[1])))
server.listen(3)
server.setblocking(0)
clients = {}
writers = {}
def dropClient(cli, errors=None):
if errors:
print 'Client %s left unexpectedly:' % (clients[cli],)
print ' ', errors
else:
print 'Client %s left politely' % (clients[cli],)
del clients[cli]
if writers.has_key(cli):
del writers[cli]
if not errors:
cli.shutdown()
cli.close()
while 1:
try:
r,w,_ = select.select([server]+clients.keys(), writers.keys(), [])
except:
break
for cli in r:
if cli == server:
cli,addr = server.accept()
print 'Connection from %s' % (addr,)
clients[cli] = addr
else:
try:
ret = cli.recv(1024)
except (SSL.WantReadError, SSL.WantWriteError, SSL.WantX509LookupError):
pass
except SSL.ZeroReturnError:
dropClient(cli)
except SSL.Error, errors:
dropClient(cli, errors)
else:
if not writers.has_key(cli):
writers[cli] = ''
writers[cli] = writers[cli] + ret
for cli in w:
try:
ret = cli.send(writers[cli])
except (SSL.WantReadError, SSL.WantWriteError, SSL.WantX509LookupError):
pass
except SSL.ZeroReturnError:
dropClient(cli)
except SSL.Error, errors:
dropClient(cli, errors)
else:
writers[cli] = writers[cli][ret:]
if writers[cli] == '':
del writers[cli]
for cli in clients.keys():
cli.close()
server.close()