3 # Copyright (C) 2014 Simo Sorce <simo@redhat.com>
5 # see file 'COPYING' for use and warranty information
7 # This program is free software; you can redistribute it and/or modify
8 # it under the terms of the GNU General Public License as published by
9 # the Free Software Foundation, either version 3 of the License, or
10 # (at your option) any later version.
12 # This program is distributed in the hope that it will be useful,
13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 # GNU General Public License for more details.
17 # You should have received a copy of the GNU General Public License
18 # along with this program. If not, see <http://www.gnu.org/licenses/>.
20 from ipsilon.providers.common import ProviderPageBase
21 from ipsilon.providers.saml2.provider import ServiceProvider
22 from ipsilon.providers.saml2.provider import InvalidProviderId
23 from ipsilon.providers.saml2.provider import NameIdNotAllowed
24 from ipsilon.util.user import UserSession
30 class AuthenticationError(Exception):
32 def __init__(self, message, code):
33 super(AuthenticationError, self).__init__(message)
34 self.message = message
38 return repr(self.message)
41 class InvalidRequest(Exception):
43 def __init__(self, message):
44 super(InvalidRequest, self).__init__(message)
45 self.message = message
48 return repr(self.message)
51 class AuthenticateRequest(ProviderPageBase):
53 def __init__(self, *args, **kwargs):
54 super(AuthenticateRequest, self).__init__(*args, **kwargs)
57 self.stage = self.STAGE_INIT
60 def auth(self, login):
62 self.saml2checks(login)
63 self.saml2assertion(login)
64 except AuthenticationError, e:
65 self.saml2error(login, e.code, e.message)
66 return self.reply(login)
68 def _parse_request(self, message):
70 login = lasso.Login(self.cfg.idp)
73 login.processAuthnRequestMsg(message)
74 except (lasso.ProfileInvalidMsgError,
75 lasso.ProfileMissingIssuerError), e:
77 msg = 'Malformed Request %r [%r]' % (e, message)
78 raise InvalidRequest(msg)
80 except (lasso.ProfileInvalidProtocolprofileError,
83 msg = 'Invalid SAML Request: %r (%r [%r])' % (login.request,
85 raise InvalidRequest(msg)
87 except (lasso.ServerProviderNotFoundError,
88 lasso.ProfileUnknownProviderError), e:
90 msg = 'Invalid SP [%s] (%r [%r])' % (login.remoteProviderId,
92 raise InvalidRequest(msg)
94 self._debug('SP %s requested authentication' % login.remoteProviderId)
98 def saml2login(self, request):
101 raise cherrypy.HTTPError(400,
102 'SAML request token missing or empty')
105 login = self._parse_request(request)
106 except InvalidRequest, e:
108 raise cherrypy.HTTPError(400, 'Invalid SAML request token')
109 except Exception, e: # pylint: disable=broad-except
111 raise cherrypy.HTTPError(500)
115 def saml2checks(self, login):
117 session = UserSession()
118 user = session.get_user()
119 if user.is_anonymous:
120 if self.stage < self.STAGE_AUTH:
121 session.save_data('saml2', 'stage', self.STAGE_AUTH)
122 session.save_data('saml2', 'Request', login.dump())
123 session.save_data('login', 'Return',
124 '%s/saml2/SSO/Continue' % self.basepath)
125 raise cherrypy.HTTPRedirect('%s/login' % self.basepath)
127 raise AuthenticationError(
128 "Unknown user", lasso.SAML2_STATUS_CODE_AUTHN_FAILED)
130 self._audit("Logged in user: %s [%s]" % (user.name, user.fullname))
132 # TODO: check if this is the first time this user access this SP
133 # If required by user prefs, ask user for consent once and then
137 # TODO: check destination
140 provider = ServiceProvider(self.cfg, login.remoteProviderId)
141 nameid = provider.get_valid_nameid(login.request.nameIdPolicy)
142 except NameIdNotAllowed, e:
143 raise AuthenticationError(
144 str(e), lasso.SAML2_STATUS_CODE_INVALID_NAME_ID_POLICY)
145 except InvalidProviderId, e:
146 raise AuthenticationError(
147 str(e), lasso.SAML2_STATUS_CODE_AUTHN_FAILED)
149 self.nameidfmt = nameid
151 # TODO: check login.request.forceAuthn
153 login.validateRequestMsg(not user.is_anonymous, consent)
155 def saml2assertion(self, login):
157 authtime = datetime.datetime.utcnow()
158 skew = datetime.timedelta(0, 60)
159 authtime_notbefore = authtime - skew
160 authtime_notafter = authtime + skew
162 user = UserSession().get_user()
164 # TODO: get authentication type fnd name format from session
165 # need to save which login manager authenticated and map it to a
166 # saml2 authentication context
167 authn_context = lasso.SAML2_AUTHN_CONTEXT_UNSPECIFIED
169 timeformat = '%Y-%m-%dT%H:%M:%SZ'
170 login.buildAssertion(authn_context,
171 authtime.strftime(timeformat),
173 authtime_notbefore.strftime(timeformat),
174 authtime_notafter.strftime(timeformat))
177 if self.nameidfmt == lasso.SAML2_NAME_IDENTIFIER_FORMAT_PERSISTENT:
178 nameid = user.name ## TODO map to something else ?
179 elif self.nameidfmt == lasso.SAML2_NAME_IDENTIFIER_FORMAT_TRANSIENT:
180 nameid = user.name ## TODO map to something else ?
183 login.assertion.subject.nameId.format = self.nameidfmt
184 login.assertion.subject.nameId.content = nameid
186 raise AuthenticationError("Unavailable Name ID type",
187 lasso.SAML2_STATUS_CODE_AUTHN_FAILED)
189 # TODO: add user attributes as policy requires taking from 'usersession'
191 def saml2error(self, login, code, message):
192 status = lasso.Samlp2Status()
193 status.statusCode = lasso.Samlp2StatusCode()
194 status.statusCode.value = lasso.SAML2_STATUS_CODE_RESPONDER
195 status.statusCode.statusCode = lasso.Samlp2StatusCode()
196 status.statusCode.statusCode.value = code
197 login.response.status = status
199 def reply(self, login):
200 if login.protocolProfile == lasso.LOGIN_PROTOCOL_PROFILE_BRWS_ART:
202 raise cherrypy.HTTPError(501)
203 elif login.protocolProfile == lasso.LOGIN_PROTOCOL_PROFILE_BRWS_POST:
204 login.buildAuthnResponseMsg()
205 self._debug('POSTing back to SP [%s]' % (login.msgUrl))
207 "title": 'Redirecting back to the web application',
208 "action": login.msgUrl,
210 [lasso.SAML2_FIELD_RESPONSE, login.msgBody],
211 [lasso.SAML2_FIELD_RELAYSTATE, login.msgRelayState],
213 "submit": 'Return to application',
215 # pylint: disable=star-args
216 return self._template('saml2/post_response.html', **context)
219 raise cherrypy.HTTPError(500)