Files
deb-python-pysaml2/example/idp/idp.py
2013-01-18 14:59:00 +01:00

304 lines
11 KiB
Python
Executable File

#!/usr/bin/env python
import re
import logging
#from cgi import parse_qs
from urlparse import parse_qs
from saml2.httputil import Unauthorized, NotFound, BadRequest
from saml2.httputil import ServiceError
from saml2.httputil import Response
from saml2.pack import http_form_post_message
from saml2.saml import AUTHN_PASSWORD
from saml2 import server
from saml2 import BINDING_HTTP_REDIRECT, BINDING_HTTP_POST
from saml2 import time_util
from Cookie import SimpleCookie
logger = logging.getLogger("saml2.IDP")
AUTHN = (AUTHN_PASSWORD, "http://www.example.com/login")
def _expiration(timeout, format=None):
if timeout == "now":
return time_util.instant(format)
else:
# validity time should match lifetime of assertions
return time_util.in_a_while(minutes=timeout, format=format)
# -----------------------------------------------------------------------------
def dict_to_table(ava, lev=0, width=1):
txt = ['<table border=%s bordercolor="black">\n' % width]
for prop, valarr in ava.items():
txt.append("<tr>\n")
if isinstance(valarr, basestring):
txt.append("<th>%s</th>\n" % str(prop))
try:
txt.append("<td>%s</td>\n" % valarr.encode("utf8"))
except AttributeError:
txt.append("<td>%s</td>\n" % valarr)
elif isinstance(valarr, list):
index = 0
num = len(valarr)
for val in valarr:
if not index:
txt.append("<th rowspan=%d>%s</td>\n" % (len(valarr), prop))
else:
txt.append("<tr>\n")
if isinstance(val, dict):
txt.append("<td>\n")
txt.extend(dict_to_table(val, lev+1, width-1))
txt.append("</td>\n")
else:
try:
txt.append("<td>%s</td>\n" % val.encode("utf8"))
except AttributeError:
txt.append("<td>%s</td>\n" % val)
if num > 1:
txt.append("</tr>\n")
num -= 1
index += 1
elif isinstance(valarr, dict):
txt.append("<th>%s</th>\n" % prop)
txt.append("<td>\n")
txt.extend(dict_to_table(valarr, lev+1, width-1))
txt.append("</td>\n")
txt.append("</tr>\n")
txt.append('</table>\n')
return txt
REPOZE_ID_EQUIVALENT = "uid"
FORM_SPEC = """<form name="myform" method="post" action="%s">
<input type="hidden" name="SAMLResponse" value="%s" />
<input type="hidden" name="RelayState" value="%s" />
</form>"""
def sso(environ, start_response, user):
""" Supposed to return a self issuing Form POST """
#edict = dict_to_table(environ)
#if logger: logger.info("Environ keys: %s" % environ.keys())
logger.info("--- In SSO ---")
query = None
if "QUERY_STRING" in environ:
if logger:
logger.info("Query string: %s" % environ["QUERY_STRING"])
query = parse_qs(environ["QUERY_STRING"])
elif "s2repoze.qinfo" in environ:
query = environ["s2repoze.qinfo"]
if not query:
resp = Unauthorized('Unknown user')
return resp(environ, start_response)
# base 64 encoded request
# Assume default binding, that is HTTP-redirect
req = IDP.parse_authn_request(query["SAMLRequest"][0])
if req is None:
resp = ServiceError("Failed to parse the SAML request")
return resp(environ, start_response)
logger.info("parsed OK")
logger.info("%s" % req)
identity = dict(environ["repoze.who.identity"]["user"])
logger.info("Identity: %s" % (identity,))
userid = environ["repoze.who.identity"]['repoze.who.userid']
if REPOZE_ID_EQUIVALENT:
identity[REPOZE_ID_EQUIVALENT] = userid
# What's the binding ? ProtocolBinding
if req.message.protocol_binding == BINDING_HTTP_REDIRECT:
_binding = BINDING_HTTP_POST
else:
_binding = req.message.protocol_binding
try:
resp_args = IDP.response_args(req.message, [_binding])
except Exception:
raise
if req.message.assertion_consumer_service_url:
if req.message.assertion_consumer_service_url != resp_args["destination"]:
# serious error on someones behalf
logger.error("%s != %s" % (req.message.assertion_consumer_service_url,
resp_args["destination"]))
resp = BadRequest("ConsumerURL and return destination mismatch")
raise resp(environ, start_response)
try:
authn_resp = IDP.create_authn_response(identity, userid=userid,
authn=AUTHN, **resp_args)
except Exception, excp:
logger.error("Exception: %s" % (excp,))
raise
logger.info("AuthNResponse: %s" % authn_resp)
http_args = http_form_post_message(authn_resp, resp_args["destination"],
relay_state=query["RelayState"][0],
typ="SAMLResponse")
resp = Response(http_args["data"], headers=http_args["headers"])
return resp(environ, start_response)
def whoami(environ, start_response, user):
identity = environ["repoze.who.identity"].copy()
for prop in ["login", "password"]:
try:
del identity[prop]
except KeyError:
continue
response = Response(dict_to_table(identity))
return response(environ, start_response)
def not_found(environ, start_response):
"""Called if no URL matches."""
resp = NotFound('Not Found')
return resp(environ, start_response)
def not_authn(environ, start_response):
if "QUERY_STRING" in environ:
query = parse_qs(environ["QUERY_STRING"])
logger.info("query: %s" % query)
resp = Unauthorized('Unknown user')
return resp(environ, start_response)
def slo(environ, start_response, user):
""" Expects a HTTP-redirect logout request """
query = None
if "QUERY_STRING" in environ:
logger.info("Query string: %s" % environ["QUERY_STRING"])
query = parse_qs(environ["QUERY_STRING"])
if not query:
resp = Unauthorized('Unknown user')
return resp(environ, start_response)
try:
req_info = IDP.parse_logout_request(query["SAMLRequest"][0],
BINDING_HTTP_REDIRECT)
logger.info("LOGOUT request parsed OK")
logger.info("REQ_INFO: %s" % req_info.message)
except KeyError, exc:
logger.info("logout request error: %s" % (exc,))
resp = BadRequest('Request parse error')
return resp(environ, start_response)
# look for the subject
subject = req_info.subject_id()
subject = subject.text.strip()
logger.info("Logout subject: %s" % (subject,))
status = None
# Either HTTP-Post or HTTP-redirect is possible, prefer HTTP-Post.
# Order matters
bindings = [BINDING_HTTP_POST, BINDING_HTTP_REDIRECT]
try:
response = IDP.create_logout_response(req_info.message,
bindings)
binding, destination = IDP.pick_binding("single_logout_service",
bindings, "spsso", response)
http_args = IDP.apply_binding(binding, "%s" % response, destination,
query["RelayState"], response=True)
except Exception, exc:
resp = BadRequest('%s' % exc)
return resp(environ, start_response)
delco = delete_cookie(environ, "pysaml2idp")
if delco:
http_args["headers"].append(delco)
if binding == BINDING_HTTP_POST:
resp = Response(http_args["data"], headers=http_args["headers"])
else:
resp = NotFound(http_args["data"], headers=http_args["headers"])
return resp(environ, start_response)
def delete_cookie(environ, name):
kaka = environ.get("HTTP_COOKIE", '')
if kaka:
cookie_obj = SimpleCookie(kaka)
morsel = cookie_obj.get(name, None)
cookie = SimpleCookie()
cookie[name] = morsel
cookie[name]["expires"] = \
_expiration("now", "%a, %d-%b-%Y %H:%M:%S CET")
return tuple(cookie.output().split(": ", 1))
return None
# ----------------------------------------------------------------------------
# map urls to functions
URLS = [
(r'whoami$', whoami),
(r'whoami/(.*)$', whoami),
(r'sso$', sso),
(r'sso/(.*)$', sso),
(r'logout$', slo),
(r'logout/(.*)$', slo),
]
# ----------------------------------------------------------------------------
def application(environ, start_response):
"""
The main WSGI application. Dispatch the current request to
the functions from above and store the regular expression
captures in the WSGI environment as `myapp.url_args` so that
the functions from above can access the url placeholders.
If nothing matches call the `not_found` function.
:param environ: The HTTP application environment
:param start_response: The application to run when the handling of the
request is done
:return: The response as a list of lines
"""
user = environ.get("REMOTE_USER", "")
kaka = environ.get("HTTP_COOKIE", '')
if not user:
user = environ.get("repoze.who.identity", "")
path = environ.get('PATH_INFO', '').lstrip('/')
logger.info("<application> PATH: %s" % path)
logger.info("Cookie: %s" % (kaka,))
for regex, callback in URLS:
if user:
match = re.search(regex, path)
if match is not None:
try:
environ['myapp.url_args'] = match.groups()[0]
except IndexError:
environ['myapp.url_args'] = path
logger.info("callback: %s" % (callback,))
return callback(environ, start_response, user)
else:
logger.info("-- No USER --")
return not_authn(environ, start_response)
return not_found(environ, start_response)
# ----------------------------------------------------------------------------
from repoze.who.config import make_middleware_with_config
APP_WITH_AUTH = make_middleware_with_config(application, {"here":"."},
'./who.ini', log_file="repoze_who.log")
# ----------------------------------------------------------------------------
if __name__ == '__main__':
import sys
from wsgiref.simple_server import make_server
PORT = 8088
IDP = server.Server(sys.argv[1])
SRV = make_server('localhost', PORT, APP_WITH_AUTH)
print "IdP listening on port: %s" % PORT
SRV.serve_forever()