#!/usr/bin/env python
# -*- coding: utf-8 -*-
"""
Written by Michele Comitini <mcm@glisco.it>
License: GPL v3
Adds support for x509 authentication.
"""
from gluon.globals import current
from gluon.storage import Storage
from gluon.http import HTTP,redirect
#requires M2Crypto
from M2Crypto import X509
class X509Auth(object):
"""
Login using x509 cert from client.
"""
def __init__(self):
self.request = current.request
self.ssl_client_raw_cert = self.request.env.ssl_client_raw_cert
# rebuild the certificate passed by the env
# this is double work, but it is the only way
# since we cannot access the web server ssl engine directly
if self.ssl_client_raw_cert:
x509=X509.load_cert_string(self.ssl_client_raw_cert, X509.FORMAT_PEM)
# extract it from the cert
self.serial = self.request.env.ssl_client_serial or ('%x' % x509.get_serial_number()).upper()
subject = x509.get_subject()
# Reordering the subject map to a usable Storage map
# this allows us a cleaner syntax:
# cn = self.subject.cn
self.subject = Storage(filter(None,
map(lambda x:
(x,map(lambda y:
y.get_data().as_text(),
subject.get_entries_by_nid(subject.nid[x]))),
subject.nid.keys())))
def login_form(self, **args):
raise HTTP(403,'Login not allowed. No valid x509 crentials')
def login_url(self, next="/"):
raise HTTP(403,'Login not allowed. No valid x509 crentials')
def logout_url(self, next="/"):
return next
def get_user(self):
'''Returns the user info contained in the certificate.
'''
# We did not get the client cert?
if not self.ssl_client_raw_cert:
return None
# Try to reconstruct some useful info for web2py auth machinery
p = profile = dict()
username = p['username'] = self.subject.CN or self.subject.commonName
p['first_name'] = self.subject.givenName or username
p['last_name'] = self.subject.surname
p['email'] = self.subject.Email or self.subject.emailAddress
# IMPORTANT WE USE THE CERT SERIAL AS UNIQUE KEY FOR THE USER
p['registration_id'] = self.serial
# If the auth table has a field certificate it will be used to
# save a PEM encoded copy of the user certificate.
p['certificate'] = self.ssl_client_raw_cert
return profile