[pyOpenSSL] need help on code

[Ogz]

Below is a sample code. 

As i understood this is the client side part of the code.
What else do i need to write its server part and should i use
use_certificate_file or privatekey_file? If so how? Please show me
with a samplke little code.

#!/usr/bin/env python
# OpenSSL example with verification - Chapter 15 - osslverify.py
#
# Command-line arguments -- root CA file, remote host

import socket, sys
from OpenSSL import SSL

# Grab the command-line parameters
#cafile, host = sys.argv[1:]
#
cafile = 'certfiles.crt'
host = 'www.openssl.org'

def printx509(x509):
    """Display an X.509 certificate"""
    fields = {'country_name': 'Country',
        'SP': 'State/Province',
        'L': 'Locality',
        'O': 'Organization',
        'OU': 'Organizational Unit',
        'CN': 'Common Name',
        'email': 'E-Mail'}

    for field, desc in fields.items():
        try:
            print "%30s: %s" % (desc, getattr(x509, field))
        except:
            pass

# Whether or not the certificate name has been verified
cnverified = 0

def verify(connection, certificate, errnum, depth,  ok):
    """Verify a given certificate"""
    global cnverified

    print connection, certificate, errnum, depth, ok	

    subject = certificate.get_subject()
    issuer = certificate.get_issuer()

    print "Certificate from:"
    printx509(subject)


    print "\nIssued By:"
    printx509(issuer)

    if not ok:
        # OpenSSL could not verify the digital signature.
        print "Could not verify certificate."
        return 0

    # Digital signature verified.  Now make sure it's for the server
    # we connected to.
    if subject.CN == None or subject.CN.lower() != host.lower():
        print "Connected to %s, but got cert for %s" % \
                (host, subject.CN)
    else:
        cnverified = 1

    if depth == 0 and not cnverified:
        print "Could not verify server name; failing."
        return 0

    print "-" * 70
    return 1 
    
ctx = SSL.Context(SSL.SSLv23_METHOD)
ctx.load_verify_locations(cafile)

# Set up the verification.  Notice we pass the verify function to
# ctx.set_verify()
ctx.set_verify(SSL.VERIFY_PEER | SSL.VERIFY_FAIL_IF_NO_PEER_CERT, verify)

print "Creating socket...",
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
print "done."

ssl = SSL.Connection(ctx, s)

print "Establishing SSL...",
ssl.connect((host, 443))
print "done."

print "Requesting document..."
ssl.sendall("GET / HTTP/1.0\r\n\r\n")
print "done."

while 1:
    try:
        buf = ssl.recv(4096)
    except SSL.ZeroReturnError:
        break
    sys.stdout.write(buf)

ssl.close()