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, ProviderException
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(ProviderException):
32 def __init__(self, message, code):
33 super(AuthenticationError, self).__init__(message)
35 self._debug('%s [%s]' % (message, code))
38 class InvalidRequest(ProviderException):
40 def __init__(self, message):
41 super(InvalidRequest, self).__init__(message)
45 class AuthenticateRequest(ProviderPageBase):
47 def __init__(self, *args, **kwargs):
48 super(AuthenticateRequest, self).__init__(*args, **kwargs)
51 self.stage = self.STAGE_INIT
53 def auth(self, login):
55 self.saml2checks(login)
56 except AuthenticationError, e:
57 self.saml2error(login, e.code, e.message)
58 return self.reply(login)
60 def _parse_request(self, message):
62 login = lasso.Login(self.cfg.idp)
65 login.processAuthnRequestMsg(message)
66 except (lasso.ProfileInvalidMsgError,
67 lasso.ProfileMissingIssuerError), e:
69 msg = 'Malformed Request %r [%r]' % (e, message)
70 raise InvalidRequest(msg)
72 except (lasso.ProfileInvalidProtocolprofileError,
75 msg = 'Invalid SAML Request: %r (%r [%r])' % (login.request,
77 raise InvalidRequest(msg)
79 except (lasso.ServerProviderNotFoundError,
80 lasso.ProfileUnknownProviderError), e:
82 msg = 'Invalid SP [%s] (%r [%r])' % (login.remoteProviderId,
84 raise InvalidRequest(msg)
86 self._debug('SP %s requested authentication' % login.remoteProviderId)
90 def saml2login(self, request):
93 raise cherrypy.HTTPError(400,
94 'SAML request token missing or empty')
97 login = self._parse_request(request)
98 except InvalidRequest, e:
100 raise cherrypy.HTTPError(400, 'Invalid SAML request token')
101 except Exception, e: # pylint: disable=broad-except
103 raise cherrypy.HTTPError(500)
107 def saml2checks(self, login):
109 session = UserSession()
110 user = session.get_user()
111 if user.is_anonymous:
112 if self.stage < self.STAGE_AUTH:
113 session.save_data('saml2', 'stage', self.STAGE_AUTH)
114 session.save_data('saml2', 'Request', login.dump())
115 session.save_data('login', 'Return',
116 '%s/saml2/SSO/Continue' % self.basepath)
117 raise cherrypy.HTTPRedirect('%s/login' % self.basepath)
119 raise AuthenticationError(
120 "Unknown user", lasso.SAML2_STATUS_CODE_AUTHN_FAILED)
122 self._audit("Logged in user: %s [%s]" % (user.name, user.fullname))
124 # TODO: check if this is the first time this user access this SP
125 # If required by user prefs, ask user for consent once and then
129 # TODO: check destination
132 provider = ServiceProvider(self.cfg, login.remoteProviderId)
133 nameidfmt = provider.get_valid_nameid(login.request.nameIdPolicy)
134 except NameIdNotAllowed, e:
135 raise AuthenticationError(
136 str(e), lasso.SAML2_STATUS_CODE_INVALID_NAME_ID_POLICY)
137 except InvalidProviderId, e:
138 raise AuthenticationError(
139 str(e), lasso.SAML2_STATUS_CODE_AUTHN_FAILED)
141 # TODO: check login.request.forceAuthn
143 login.validateRequestMsg(not user.is_anonymous, consent)
145 authtime = datetime.datetime.utcnow()
146 skew = datetime.timedelta(0, 60)
147 authtime_notbefore = authtime - skew
148 authtime_notafter = authtime + skew
153 # TODO: get authentication type fnd name format from session
154 # need to save which login manager authenticated and map it to a
155 # saml2 authentication context
156 authn_context = lasso.SAML2_AUTHN_CONTEXT_UNSPECIFIED
158 timeformat = '%Y-%m-%dT%H:%M:%SZ'
159 login.buildAssertion(authn_context,
160 authtime.strftime(timeformat),
162 authtime_notbefore.strftime(timeformat),
163 authtime_notafter.strftime(timeformat))
166 if nameidfmt == lasso.SAML2_NAME_IDENTIFIER_FORMAT_PERSISTENT:
167 ## TODO map to something else ?
168 nameid = provider.normalize_username(user.name)
169 elif nameidfmt == lasso.SAML2_NAME_IDENTIFIER_FORMAT_TRANSIENT:
170 ## TODO map to something else ?
171 nameid = provider.normalize_username(user.name)
172 elif nameidfmt == lasso.SAML2_NAME_IDENTIFIER_FORMAT_KERBEROS:
173 nameid = us.get_data('user', 'krb_principal_name')
174 elif nameidfmt == lasso.SAML2_NAME_IDENTIFIER_FORMAT_EMAIL:
175 nameid = us.get_user().email
177 nameid = '%s@%s' % (user.name, self.cfg.default_email_domain)
180 login.assertion.subject.nameId.format = nameidfmt
181 login.assertion.subject.nameId.content = nameid
183 raise AuthenticationError("Unavailable Name ID type",
184 lasso.SAML2_STATUS_CODE_AUTHN_FAILED)
186 # TODO: add user attributes as policy requires from 'usersession'
188 def saml2error(self, login, code, message):
189 status = lasso.Samlp2Status()
190 status.statusCode = lasso.Samlp2StatusCode()
191 status.statusCode.value = lasso.SAML2_STATUS_CODE_RESPONDER
192 status.statusCode.statusCode = lasso.Samlp2StatusCode()
193 status.statusCode.statusCode.value = code
194 login.response.status = status
196 def reply(self, login):
197 if login.protocolProfile == lasso.LOGIN_PROTOCOL_PROFILE_BRWS_ART:
199 raise cherrypy.HTTPError(501)
200 elif login.protocolProfile == lasso.LOGIN_PROTOCOL_PROFILE_BRWS_POST:
201 login.buildAuthnResponseMsg()
202 self._debug('POSTing back to SP [%s]' % (login.msgUrl))
204 "title": 'Redirecting back to the web application',
205 "action": login.msgUrl,
207 [lasso.SAML2_FIELD_RESPONSE, login.msgBody],
208 [lasso.SAML2_FIELD_RELAYSTATE, login.msgRelayState],
210 "submit": 'Return to application',
212 # pylint: disable=star-args
213 return self._template('saml2/post_response.html', **context)
216 raise cherrypy.HTTPError(500)