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
59 def auth(self, login):
61 self.saml2checks(login)
62 except AuthenticationError, e:
63 self.saml2error(login, e.code, e.message)
64 return self.reply(login)
66 def _parse_request(self, message):
68 login = lasso.Login(self.cfg.idp)
71 login.processAuthnRequestMsg(message)
72 except (lasso.ProfileInvalidMsgError,
73 lasso.ProfileMissingIssuerError), e:
75 msg = 'Malformed Request %r [%r]' % (e, message)
76 raise InvalidRequest(msg)
78 except (lasso.ProfileInvalidProtocolprofileError,
81 msg = 'Invalid SAML Request: %r (%r [%r])' % (login.request,
83 raise InvalidRequest(msg)
85 except (lasso.ServerProviderNotFoundError,
86 lasso.ProfileUnknownProviderError), e:
88 msg = 'Invalid SP [%s] (%r [%r])' % (login.remoteProviderId,
90 raise InvalidRequest(msg)
92 self._debug('SP %s requested authentication' % login.remoteProviderId)
96 def saml2login(self, request):
99 raise cherrypy.HTTPError(400,
100 'SAML request token missing or empty')
103 login = self._parse_request(request)
104 except InvalidRequest, e:
106 raise cherrypy.HTTPError(400, 'Invalid SAML request token')
107 except Exception, e: # pylint: disable=broad-except
109 raise cherrypy.HTTPError(500)
113 def saml2checks(self, login):
115 session = UserSession()
116 user = session.get_user()
117 if user.is_anonymous:
118 if self.stage < self.STAGE_AUTH:
119 session.save_data('saml2', 'stage', self.STAGE_AUTH)
120 session.save_data('saml2', 'Request', login.dump())
121 session.save_data('login', 'Return',
122 '%s/saml2/SSO/Continue' % self.basepath)
123 raise cherrypy.HTTPRedirect('%s/login' % self.basepath)
125 raise AuthenticationError(
126 "Unknown user", lasso.SAML2_STATUS_CODE_AUTHN_FAILED)
128 self._audit("Logged in user: %s [%s]" % (user.name, user.fullname))
130 # TODO: check if this is the first time this user access this SP
131 # If required by user prefs, ask user for consent once and then
135 # TODO: check destination
138 provider = ServiceProvider(self.cfg, login.remoteProviderId)
139 nameidfmt = provider.get_valid_nameid(login.request.nameIdPolicy)
140 except NameIdNotAllowed, e:
141 raise AuthenticationError(
142 str(e), lasso.SAML2_STATUS_CODE_INVALID_NAME_ID_POLICY)
143 except InvalidProviderId, e:
144 raise AuthenticationError(
145 str(e), lasso.SAML2_STATUS_CODE_AUTHN_FAILED)
147 # TODO: check login.request.forceAuthn
149 login.validateRequestMsg(not user.is_anonymous, consent)
151 authtime = datetime.datetime.utcnow()
152 skew = datetime.timedelta(0, 60)
153 authtime_notbefore = authtime - skew
154 authtime_notafter = authtime + skew
159 # TODO: get authentication type fnd name format from session
160 # need to save which login manager authenticated and map it to a
161 # saml2 authentication context
162 authn_context = lasso.SAML2_AUTHN_CONTEXT_UNSPECIFIED
164 timeformat = '%Y-%m-%dT%H:%M:%SZ'
165 login.buildAssertion(authn_context,
166 authtime.strftime(timeformat),
168 authtime_notbefore.strftime(timeformat),
169 authtime_notafter.strftime(timeformat))
172 if nameidfmt == lasso.SAML2_NAME_IDENTIFIER_FORMAT_PERSISTENT:
173 ## TODO map to something else ?
174 nameid = provider.normalize_username(user.name)
175 elif nameidfmt == lasso.SAML2_NAME_IDENTIFIER_FORMAT_TRANSIENT:
176 ## TODO map to something else ?
177 nameid = provider.normalize_username(user.name)
178 elif nameidfmt == lasso.SAML2_NAME_IDENTIFIER_FORMAT_KERBEROS:
179 nameid = us.get_data('user', 'krb_principal_name')
180 elif nameidfmt == lasso.SAML2_NAME_IDENTIFIER_FORMAT_EMAIL:
181 nameid = us.get_user().email
183 nameid = '%s@%s' % (user.name, self.cfg.default_email_domain)
186 login.assertion.subject.nameId.format = nameidfmt
187 login.assertion.subject.nameId.content = nameid
189 raise AuthenticationError("Unavailable Name ID type",
190 lasso.SAML2_STATUS_CODE_AUTHN_FAILED)
192 # TODO: add user attributes as policy requires taking from 'usersession'
194 def saml2error(self, login, code, message):
195 status = lasso.Samlp2Status()
196 status.statusCode = lasso.Samlp2StatusCode()
197 status.statusCode.value = lasso.SAML2_STATUS_CODE_RESPONDER
198 status.statusCode.statusCode = lasso.Samlp2StatusCode()
199 status.statusCode.statusCode.value = code
200 login.response.status = status
202 def reply(self, login):
203 if login.protocolProfile == lasso.LOGIN_PROTOCOL_PROFILE_BRWS_ART:
205 raise cherrypy.HTTPError(501)
206 elif login.protocolProfile == lasso.LOGIN_PROTOCOL_PROFILE_BRWS_POST:
207 login.buildAuthnResponseMsg()
208 self._debug('POSTing back to SP [%s]' % (login.msgUrl))
210 "title": 'Redirecting back to the web application',
211 "action": login.msgUrl,
213 [lasso.SAML2_FIELD_RESPONSE, login.msgBody],
214 [lasso.SAML2_FIELD_RELAYSTATE, login.msgRelayState],
216 "submit": 'Return to application',
218 # pylint: disable=star-args
219 return self._template('saml2/post_response.html', **context)
222 raise cherrypy.HTTPError(500)