def provider_login(request):
"""
OpenID login endpoint
"""
# make and validate endpoint
endpoint = get_xrds_url('login', request)
if not endpoint:
return default_render_failure(request, "Invalid OpenID request")
# initialize store and server
store = DjangoOpenIDStore()
server = Server(store, endpoint)
# first check to see if the request is an OpenID request.
# If so, the client will have specified an 'openid.mode' as part
# of the request.
querydict = dict(request.REQUEST.items())
error = False
if 'openid.mode' in request.GET or 'openid.mode' in request.POST:
# decode request
try:
openid_request = server.decodeRequest(querydict)
except (UntrustedReturnURL, ProtocolError):
openid_request = None
if not openid_request:
return default_render_failure(request, "Invalid OpenID request")
# don't allow invalid and non-trusted trust roots
if not validate_trust_root(openid_request):
return default_render_failure(request, "Invalid OpenID trust root")
# checkid_immediate not supported, require user interaction
if openid_request.mode == 'checkid_immediate':
return provider_respond(server, openid_request,
openid_request.answer(False), {})
# checkid_setup, so display login page
# (by falling through to the provider_login at the
# bottom of this method).
elif openid_request.mode == 'checkid_setup':
if openid_request.idSelect():
# remember request and original path
request.session['openid_setup'] = {
'request': openid_request,
'url': request.get_full_path()
}
# user failed login on previous attempt
if 'openid_error' in request.session:
error = True
del request.session['openid_error']
# OpenID response
else:
return provider_respond(server, openid_request,
server.handleRequest(openid_request), {})
# handle login redirection: these are also sent to this view function,
# but are distinguished by lacking the openid mode. We also know that
# they are posts, because they come from the popup
elif request.method == 'POST' and 'openid_setup' in request.session:
# get OpenID request from session
openid_setup = request.session['openid_setup']
openid_request = openid_setup['request']
openid_request_url = openid_setup['url']
del request.session['openid_setup']
# don't allow invalid trust roots
if not validate_trust_root(openid_request):
return default_render_failure(request, "Invalid OpenID trust root")
# check if user with given email exists
# Failure is redirected to this method (by using the original URL),
# which will bring up the login dialog.
email = request.POST.get('email', None)
try:
user = User.objects.get(email=email)
except User.DoesNotExist:
request.session['openid_error'] = True
msg = "OpenID login failed - Unknown user email: %s"
AUDIT_LOG.warning(msg, email)
return HttpResponseRedirect(openid_request_url)
# attempt to authenticate user (but not actually log them in...)
# Failure is again redirected to the login dialog.
username = user.username
password = request.POST.get('password', None)
try:
user = authenticate(username=username, password=password, request=request)
except RateLimitException:
AUDIT_LOG.warning('OpenID - Too many failed login attempts.')
return HttpResponseRedirect(openid_request_url)
if user is None:
request.session['openid_error'] = True
msg = "OpenID login failed - password for %s is invalid"
AUDIT_LOG.warning(msg, email)
return HttpResponseRedirect(openid_request_url)
# authentication succeeded, so fetch user information
# that was requested
if user is not None and user.is_active:
# remove error from session since login succeeded
if 'openid_error' in request.session:
del request.session['openid_error']
AUDIT_LOG.info("OpenID login success - %s (%s)",
user.username, user.email)
# redirect user to return_to location
url = endpoint + urlquote(user.username)
response = openid_request.answer(True, None, url)
# TODO: for CS50 we are forcibly returning the username
# instead of fullname. In the OpenID simple registration
# extension, we don't have to return any fields we don't
# want to, even if they were marked as required by the
# Consumer. The behavior of what to do when there are
# missing fields is up to the Consumer. The proper change
# should only return the username, however this will likely
# break the CS50 client. Temporarily we will be returning
# username filling in for fullname in addition to username
# as sreg nickname.
# Note too that this is hardcoded, and not really responding to
# the extensions that were registered in the first place.
results = {
'nickname': user.username,
'email': user.email,
'fullname': user.username
}
# the request succeeded:
return provider_respond(server, openid_request, response, results)
# the account is not active, so redirect back to the login page:
request.session['openid_error'] = True
msg = "Login failed - Account not active for user %s"
AUDIT_LOG.warning(msg, username)
return HttpResponseRedirect(openid_request_url)
# determine consumer domain if applicable
return_to = ''
if 'openid.return_to' in request.REQUEST:
return_to = request.REQUEST['openid.return_to']
matches = re.match(r'\w+:\/\/([\w\.-]+)', return_to)
return_to = matches.group(1)
# display login page
response = render_to_response('provider_login.html', {
'error': error,
'return_to': return_to
})
# add custom XRDS header necessary for discovery process
response['X-XRDS-Location'] = get_xrds_url('xrds', request)
return response
def provider_login(request):
"""
OpenID login endpoint
"""
# make and validate endpoint
endpoint = get_xrds_url('login', request)
if not endpoint:
return default_render_failure(request, "Invalid OpenID request")
# initialize store and server
store = DjangoOpenIDStore()
server = Server(store, endpoint)
# first check to see if the request is an OpenID request.
# If so, the client will have specified an 'openid.mode' as part
# of the request.
querydict = dict(request.REQUEST.items())
error = False
if 'openid.mode' in request.GET or 'openid.mode' in request.POST:
# decode request
try:
openid_request = server.decodeRequest(querydict)
except (UntrustedReturnURL, ProtocolError):
openid_request = None
if not openid_request:
return default_render_failure(request, "Invalid OpenID request")
# don't allow invalid and non-trusted trust roots
if not validate_trust_root(openid_request):
return default_render_failure(request, "Invalid OpenID trust root")
# checkid_immediate not supported, require user interaction
if openid_request.mode == 'checkid_immediate':
return provider_respond(server, openid_request,
openid_request.answer(False), {})
# checkid_setup, so display login page
# (by falling through to the provider_login at the
# bottom of this method).
elif openid_request.mode == 'checkid_setup':
if openid_request.idSelect():
# remember request and original path
request.session['openid_setup'] = {
'request': openid_request,
'url': request.get_full_path(),
'post_params': request.POST,
}
# user failed login on previous attempt
if 'openid_error' in request.session:
error = True
del request.session['openid_error']
# OpenID response
else:
return provider_respond(server, openid_request,
server.handleRequest(openid_request), {})
# handle login redirection: these are also sent to this view function,
# but are distinguished by lacking the openid mode. We also know that
# they are posts, because they come from the popup
elif request.method == 'POST' and 'openid_setup' in request.session:
# get OpenID request from session
openid_setup = request.session['openid_setup']
openid_request = openid_setup['request']
openid_request_url = openid_setup['url']
post_params = openid_setup['post_params']
# We need to preserve the parameters, and the easiest way to do this is
# through the URL
url_post_params = {
param: post_params[param]
for param in post_params if param.startswith('openid')
}
encoded_params = urllib.urlencode(url_post_params)
if '?' not in openid_request_url:
openid_request_url = openid_request_url + '?' + encoded_params
else:
openid_request_url = openid_request_url + '&' + encoded_params
del request.session['openid_setup']
# don't allow invalid trust roots
if not validate_trust_root(openid_request):
return default_render_failure(request, "Invalid OpenID trust root")
# check if user with given email exists
# Failure is redirected to this method (by using the original URL),
# which will bring up the login dialog.
email = request.POST.get('email', None)
try:
user = User.objects.get(email=email)
except User.DoesNotExist:
request.session['openid_error'] = True
if settings.FEATURES['SQUELCH_PII_IN_LOGS']:
AUDIT_LOG.warning(u"OpenID login failed - Unknown user email")
else:
msg = u"OpenID login failed - Unknown user email: {0}".format(
email)
AUDIT_LOG.warning(msg)
return HttpResponseRedirect(openid_request_url)
# attempt to authenticate user (but not actually log them in...)
# Failure is again redirected to the login dialog.
username = user.username
password = request.POST.get('password', None)
try:
user = authenticate(username=username,
password=password,
request=request)
except RateLimitException:
AUDIT_LOG.warning(u'OpenID - Too many failed login attempts.')
return HttpResponseRedirect(openid_request_url)
if user is None:
request.session['openid_error'] = True
if settings.FEATURES['SQUELCH_PII_IN_LOGS']:
AUDIT_LOG.warning(u"OpenID login failed - invalid password")
else:
AUDIT_LOG.warning(
u"OpenID login failed - password for %s is invalid", email)
return HttpResponseRedirect(openid_request_url)
# authentication succeeded, so fetch user information
# that was requested
if user is not None and user.is_active:
# remove error from session since login succeeded
if 'openid_error' in request.session:
del request.session['openid_error']
if settings.FEATURES['SQUELCH_PII_IN_LOGS']:
AUDIT_LOG.info(u"OpenID login success - user.id: %s", user.id)
else:
AUDIT_LOG.info(u"OpenID login success - %s (%s)",
user.username, user.email)
# redirect user to return_to location
url = endpoint + urlquote(user.username)
response = openid_request.answer(True, None, url)
# Note too that this is hardcoded, and not really responding to
# the extensions that were registered in the first place.
results = {
'nickname': user.username,
'email': user.email,
'fullname': user.profile.name,
}
# the request succeeded:
return provider_respond(server, openid_request, response, results)
# the account is not active, so redirect back to the login page:
request.session['openid_error'] = True
if settings.FEATURES['SQUELCH_PII_IN_LOGS']:
AUDIT_LOG.warning(
u"Login failed - Account not active for user.id %s", user.id)
else:
AUDIT_LOG.warning(u"Login failed - Account not active for user %s",
username)
return HttpResponseRedirect(openid_request_url)
# determine consumer domain if applicable
return_to = ''
if 'openid.return_to' in request.REQUEST:
return_to = request.REQUEST['openid.return_to']
matches = re.match(r'\w+:\/\/([\w\.-]+)', return_to)
return_to = matches.group(1)
# display login page
response = render_to_response('provider_login.html', {
'error': error,
'return_to': return_to
})
# add custom XRDS header necessary for discovery process
response['X-XRDS-Location'] = get_xrds_url('xrds', request)
return response