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example.py
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example.py
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import os
import ConfigParser
import optparse
import logging
import shutil
import urlparse
from StringIO import StringIO
from BaseHTTPServer import BaseHTTPRequestHandler
from BaseHTTPServer import HTTPServer
from onelogin.saml import AuthRequest, Response
from onelogin.saml.Utils import format_finger_print, calculate_x509_fingerprint
__version__ = '0.1'
log = logging.getLogger(__name__)
class SampleAppHTTPRequestHandler(BaseHTTPRequestHandler):
server_version = 'SampleAppHTTPRequestHandler/%s' % __version__
def _serve_msg(self, code, msg):
f = StringIO()
f.write('<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 3.2 Final//EN">')
f.write("<html>\n<body>\n%s</body>\n</html>\n" % msg)
length = f.tell()
f.seek(0)
if code == 200:
self.send_response(code)
else:
self.send_error(code, message=msg)
self.send_header('Content-type', 'text/html')
self.send_header('Content-Length', str(length))
self.end_headers()
shutil.copyfileobj(f, self.wfile)
def _bad_request(self):
"""Serve Bad Request (400)."""
self._serve_msg(400, 'Bad Request')
def prepare_request(self):
request_data = {}
request_data['server_name'] = self.server.server_name
request_data['server_port'] = str(self.server.server_port)
request_data['path_info'] = self.path
request_data['request_uri'] = self.path
request_data['script_name'] = ''
if self.protocol_version == 'HTTP/1.0':
request_data['https'] = 'off'
else:
request_data['https'] = 'on'
return request_data
def log_message(self, format, *args):
log.info(format % args)
def do_HEAD(self):
"""Serve a HEAD request."""
self._bad_request()
def do_DEL(self):
"""Serve a DEL request."""
self._bad_request()
def do_GET(self):
"""Serve a GET request."""
if not self.path == '/':
self._bad_request()
return
url = AuthRequest.create(**self.settings)
self.send_response(302)
self.send_header("Cache-Control", "no-cache, no-store")
self.send_header("Pragma", "no-cache")
self.send_header("Location", url)
self.end_headers()
def do_POST(self):
"""Serve a POST request."""
if not self.path == self.saml_post_path:
self._bad_request()
return
request_data = self.prepare_request()
length = int(self.headers['Content-Length'])
data = self.rfile.read(length)
query = urlparse.parse_qs(data)
res = Response(
request_data,
query['SAMLResponse'].pop(),
self.settings['idp_cert_fingerprint'],
issuer=self.settings['issuer']
)
valid = res.is_valid()
name_id = res.name_id
if valid:
msg = 'The identity of {name_id} has been verified'.format(
name_id=name_id,
)
self._serve_msg(200, msg)
else:
msg = '{name_id} is not authorized to use this resource'.format(
name_id=name_id,
)
self._serve_msg(401, msg)
def main(config_file):
logging.basicConfig(
level=logging.INFO,
format='%(asctime)s.%(msecs)03d example: %(levelname)s: %(message)s',
datefmt='%Y-%m-%dT%H:%M:%S',
)
config = ConfigParser.RawConfigParser()
config_path = os.path.expanduser(config_file)
config_path = os.path.abspath(config_path)
with open(config_path) as f:
config.readfp(f)
host = config.get('app', 'host')
port = config.get('app', 'port')
port = int(port)
settings = dict()
settings['assertion_consumer_service_url'] = config.get(
'saml',
'assertion_consumer_service_url'
)
settings['issuer'] = config.get(
'saml',
'issuer'
)
settings['name_identifier_format'] = config.get(
'saml',
'name_identifier_format'
)
settings['idp_sso_target_url'] = config.get(
'saml',
'idp_sso_target_url'
)
settings['idp_cert_file'] = config.get(
'saml',
'idp_cert_file'
)
settings['idp_cert_fingerprint'] = config.get(
'saml',
'idp_cert_fingerprint'
)
cert_file = settings.pop('idp_cert_file', None)
# idp_cert_file has priority over idp_cert_fingerprint
if cert_file:
cert_path = os.path.expanduser(cert_file)
cert_path = os.path.abspath(cert_path)
with open(cert_path) as f:
cert = f.read()
fingerprint = calculate_x509_fingerprint(cert)
if fingerprint:
settings['idp_cert_fingerprint'] = fingerprint
else:
formated = format_finger_print(settings['idp_cert_fingerprint'])
settings['idp_cert_fingerprint'] = formated
parts = urlparse.urlparse(settings['assertion_consumer_service_url'])
SampleAppHTTPRequestHandler.protocol_version = 'HTTP/1.0'
SampleAppHTTPRequestHandler.settings = settings
SampleAppHTTPRequestHandler.saml_post_path = parts.path
httpd = HTTPServer(
(host, port),
SampleAppHTTPRequestHandler,
)
socket_name = httpd.socket.getsockname()
log.info(
'Serving HTTP on {host} port {port} ...'.format(
host=socket_name[0],
port=socket_name[1],
)
)
httpd.serve_forever()
if __name__ == '__main__':
parser = optparse.OptionParser(
usage='%prog [OPTS]',
)
parser.add_option(
'--config-file',
metavar='PATH',
help='The configuration file containing the app and SAML settings',
)
parser.set_defaults(
config_file='example.cfg'
)
options, args = parser.parse_args()
if args:
parser.error('Wrong number of arguments')
main(options.config_file)