| 1 | ## $Id: authentication.py 9211 2012-09-21 08:19:35Z uli $ |
|---|
| 2 | ## |
|---|
| 3 | ## Copyright (C) 2011 Uli Fouquet & Henrik Bettermann |
|---|
| 4 | ## This program is free software; you can redistribute it and/or modify |
|---|
| 5 | ## it under the terms of the GNU General Public License as published by |
|---|
| 6 | ## the Free Software Foundation; either version 2 of the License, or |
|---|
| 7 | ## (at your option) any later version. |
|---|
| 8 | ## |
|---|
| 9 | ## This program is distributed in the hope that it will be useful, |
|---|
| 10 | ## but WITHOUT ANY WARRANTY; without even the implied warranty of |
|---|
| 11 | ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
|---|
| 12 | ## GNU General Public License for more details. |
|---|
| 13 | ## |
|---|
| 14 | ## You should have received a copy of the GNU General Public License |
|---|
| 15 | ## along with this program; if not, write to the Free Software |
|---|
| 16 | ## Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
|---|
| 17 | ## |
|---|
| 18 | """Authentication for Kofa. |
|---|
| 19 | """ |
|---|
| 20 | import grok |
|---|
| 21 | from zope.event import notify |
|---|
| 22 | from zope.component import getUtility, getUtilitiesFor |
|---|
| 23 | from zope.interface import Interface |
|---|
| 24 | from zope.schema import getFields |
|---|
| 25 | from zope.securitypolicy.interfaces import ( |
|---|
| 26 | IPrincipalRoleMap, IPrincipalRoleManager) |
|---|
| 27 | from zope.pluggableauth.factories import Principal |
|---|
| 28 | from zope.pluggableauth.plugins.session import SessionCredentialsPlugin |
|---|
| 29 | from zope.pluggableauth.interfaces import ( |
|---|
| 30 | ICredentialsPlugin, IAuthenticatorPlugin, |
|---|
| 31 | IAuthenticatedPrincipalFactory, AuthenticatedPrincipalCreated) |
|---|
| 32 | from zope.publisher.interfaces import IRequest |
|---|
| 33 | from zope.password.interfaces import IPasswordManager |
|---|
| 34 | from zope.securitypolicy.principalrole import principalRoleManager |
|---|
| 35 | from waeup.kofa.interfaces import (ILocalRoleSetEvent, |
|---|
| 36 | IUserAccount, IAuthPluginUtility, IPasswordValidator, |
|---|
| 37 | IKofaPrincipal, IKofaPrincipalInfo, IKofaPluggable) |
|---|
| 38 | |
|---|
| 39 | def setup_authentication(pau): |
|---|
| 40 | """Set up plugguble authentication utility. |
|---|
| 41 | |
|---|
| 42 | Sets up an IAuthenticatorPlugin and |
|---|
| 43 | ICredentialsPlugin (for the authentication mechanism) |
|---|
| 44 | |
|---|
| 45 | Then looks for any external utilities that want to modify the PAU. |
|---|
| 46 | """ |
|---|
| 47 | pau.credentialsPlugins = ('No Challenge if Authenticated', 'credentials') |
|---|
| 48 | pau.authenticatorPlugins = ('users',) |
|---|
| 49 | |
|---|
| 50 | # Give any third-party code and subpackages a chance to modify the PAU |
|---|
| 51 | auth_plugin_utilities = getUtilitiesFor(IAuthPluginUtility) |
|---|
| 52 | for name, util in auth_plugin_utilities: |
|---|
| 53 | util.register(pau) |
|---|
| 54 | |
|---|
| 55 | def get_principal_role_manager(): |
|---|
| 56 | """Get a role manager for principals. |
|---|
| 57 | |
|---|
| 58 | If we are currently 'in a site', return the role manager for the |
|---|
| 59 | portal or the global rolemanager else. |
|---|
| 60 | """ |
|---|
| 61 | portal = grok.getSite() |
|---|
| 62 | if portal is not None: |
|---|
| 63 | return IPrincipalRoleManager(portal) |
|---|
| 64 | return principalRoleManager |
|---|
| 65 | |
|---|
| 66 | class KofaSessionCredentialsPlugin(grok.GlobalUtility, |
|---|
| 67 | SessionCredentialsPlugin): |
|---|
| 68 | grok.provides(ICredentialsPlugin) |
|---|
| 69 | grok.name('credentials') |
|---|
| 70 | |
|---|
| 71 | loginpagename = 'login' |
|---|
| 72 | loginfield = 'form.login' |
|---|
| 73 | passwordfield = 'form.password' |
|---|
| 74 | |
|---|
| 75 | class KofaPrincipalInfo(object): |
|---|
| 76 | """An implementation of IKofaPrincipalInfo. |
|---|
| 77 | |
|---|
| 78 | A Kofa principal info is created with id, login, title, description, |
|---|
| 79 | phone, email, public_name and user_type. |
|---|
| 80 | """ |
|---|
| 81 | grok.implements(IKofaPrincipalInfo) |
|---|
| 82 | |
|---|
| 83 | def __init__(self, id, title, description, email, phone, public_name, user_type): |
|---|
| 84 | self.id = id |
|---|
| 85 | self.title = title |
|---|
| 86 | self.description = description |
|---|
| 87 | self.email = email |
|---|
| 88 | self.phone = phone |
|---|
| 89 | self.public_name = public_name |
|---|
| 90 | self.user_type = user_type |
|---|
| 91 | self.credentialsPlugin = None |
|---|
| 92 | self.authenticatorPlugin = None |
|---|
| 93 | |
|---|
| 94 | class KofaPrincipal(Principal): |
|---|
| 95 | """A portal principal. |
|---|
| 96 | |
|---|
| 97 | Kofa principals provide an extra `email`, `phone`, `public_name` and `user_type` |
|---|
| 98 | attribute extending ordinary principals. |
|---|
| 99 | """ |
|---|
| 100 | |
|---|
| 101 | grok.implements(IKofaPrincipal) |
|---|
| 102 | |
|---|
| 103 | def __init__(self, id, title=u'', description=u'', email=u'', |
|---|
| 104 | phone=None, public_name=u'', user_type=u'', prefix=None): |
|---|
| 105 | self.id = id |
|---|
| 106 | if prefix is not None: |
|---|
| 107 | self.id = '%s.%s' % (prefix, self.id) |
|---|
| 108 | self.title = title |
|---|
| 109 | self.description = description |
|---|
| 110 | self.groups = [] |
|---|
| 111 | self.email = email |
|---|
| 112 | self.phone = phone |
|---|
| 113 | self.public_name = public_name |
|---|
| 114 | self.user_type = user_type |
|---|
| 115 | |
|---|
| 116 | def __repr__(self): |
|---|
| 117 | return 'KofaPrincipal(%r)' % self.id |
|---|
| 118 | |
|---|
| 119 | class AuthenticatedKofaPrincipalFactory(grok.MultiAdapter): |
|---|
| 120 | """Creates 'authenticated' Kofa principals. |
|---|
| 121 | |
|---|
| 122 | Adapts (principal info, request) to a KofaPrincipal instance. |
|---|
| 123 | |
|---|
| 124 | This adapter is used by the standard PAU to transform |
|---|
| 125 | KofaPrincipalInfos into KofaPrincipal instances. |
|---|
| 126 | """ |
|---|
| 127 | grok.adapts(IKofaPrincipalInfo, IRequest) |
|---|
| 128 | grok.implements(IAuthenticatedPrincipalFactory) |
|---|
| 129 | |
|---|
| 130 | def __init__(self, info, request): |
|---|
| 131 | self.info = info |
|---|
| 132 | self.request = request |
|---|
| 133 | |
|---|
| 134 | def __call__(self, authentication): |
|---|
| 135 | principal = KofaPrincipal( |
|---|
| 136 | self.info.id, |
|---|
| 137 | self.info.title, |
|---|
| 138 | self.info.description, |
|---|
| 139 | self.info.email, |
|---|
| 140 | self.info.phone, |
|---|
| 141 | self.info.public_name, |
|---|
| 142 | self.info.user_type, |
|---|
| 143 | authentication.prefix, |
|---|
| 144 | ) |
|---|
| 145 | notify( |
|---|
| 146 | AuthenticatedPrincipalCreated( |
|---|
| 147 | authentication, principal, self.info, self.request)) |
|---|
| 148 | return principal |
|---|
| 149 | |
|---|
| 150 | class Account(grok.Model): |
|---|
| 151 | grok.implements(IUserAccount) |
|---|
| 152 | |
|---|
| 153 | _local_roles = dict() |
|---|
| 154 | |
|---|
| 155 | def __init__(self, name, password, title=None, description=None, |
|---|
| 156 | email=None, phone=None, public_name=None, roles = []): |
|---|
| 157 | self.name = name |
|---|
| 158 | if title is None: |
|---|
| 159 | title = name |
|---|
| 160 | self.title = title |
|---|
| 161 | self.description = description |
|---|
| 162 | self.email = email |
|---|
| 163 | self.phone = phone |
|---|
| 164 | self.public_name = public_name |
|---|
| 165 | self.setPassword(password) |
|---|
| 166 | self.setSiteRolesForPrincipal(roles) |
|---|
| 167 | # We don't want to share this dict with other accounts |
|---|
| 168 | self._local_roles = dict() |
|---|
| 169 | |
|---|
| 170 | def setPassword(self, password): |
|---|
| 171 | passwordmanager = getUtility(IPasswordManager, 'SSHA') |
|---|
| 172 | self.password = passwordmanager.encodePassword(password) |
|---|
| 173 | |
|---|
| 174 | def checkPassword(self, password): |
|---|
| 175 | if not isinstance(password, basestring): |
|---|
| 176 | return False |
|---|
| 177 | if not self.password: |
|---|
| 178 | # unset/empty passwords do never match |
|---|
| 179 | return False |
|---|
| 180 | passwordmanager = getUtility(IPasswordManager, 'SSHA') |
|---|
| 181 | return passwordmanager.checkPassword(self.password, password) |
|---|
| 182 | |
|---|
| 183 | def getSiteRolesForPrincipal(self): |
|---|
| 184 | prm = get_principal_role_manager() |
|---|
| 185 | roles = [x[0] for x in prm.getRolesForPrincipal(self.name) |
|---|
| 186 | if x[0].startswith('waeup.')] |
|---|
| 187 | return roles |
|---|
| 188 | |
|---|
| 189 | def setSiteRolesForPrincipal(self, roles): |
|---|
| 190 | prm = get_principal_role_manager() |
|---|
| 191 | old_roles = self.getSiteRolesForPrincipal() |
|---|
| 192 | if sorted(old_roles) == sorted(roles): |
|---|
| 193 | return |
|---|
| 194 | for role in old_roles: |
|---|
| 195 | # Remove old roles, not to be set now... |
|---|
| 196 | if role.startswith('waeup.') and role not in roles: |
|---|
| 197 | prm.unsetRoleForPrincipal(role, self.name) |
|---|
| 198 | for role in roles: |
|---|
| 199 | # Convert role to ASCII string to be in line with the |
|---|
| 200 | # event handler |
|---|
| 201 | prm.assignRoleToPrincipal(str(role), self.name) |
|---|
| 202 | return |
|---|
| 203 | |
|---|
| 204 | roles = property(getSiteRolesForPrincipal, setSiteRolesForPrincipal) |
|---|
| 205 | |
|---|
| 206 | def getLocalRoles(self): |
|---|
| 207 | return self._local_roles |
|---|
| 208 | |
|---|
| 209 | def notifyLocalRoleChanged(self, obj, role_id, granted=True): |
|---|
| 210 | objects = self._local_roles.get(role_id, []) |
|---|
| 211 | if granted and obj not in objects: |
|---|
| 212 | objects.append(obj) |
|---|
| 213 | if not granted and obj in objects: |
|---|
| 214 | objects.remove(obj) |
|---|
| 215 | self._local_roles[role_id] = objects |
|---|
| 216 | if len(objects) == 0: |
|---|
| 217 | del self._local_roles[role_id] |
|---|
| 218 | self._p_changed = True |
|---|
| 219 | return |
|---|
| 220 | |
|---|
| 221 | class UserAuthenticatorPlugin(grok.GlobalUtility): |
|---|
| 222 | grok.implements(IAuthenticatorPlugin) |
|---|
| 223 | grok.provides(IAuthenticatorPlugin) |
|---|
| 224 | grok.name('users') |
|---|
| 225 | |
|---|
| 226 | def authenticateCredentials(self, credentials): |
|---|
| 227 | if not isinstance(credentials, dict): |
|---|
| 228 | return None |
|---|
| 229 | if not ('login' in credentials and 'password' in credentials): |
|---|
| 230 | return None |
|---|
| 231 | account = self.getAccount(credentials['login']) |
|---|
| 232 | if account is None: |
|---|
| 233 | return None |
|---|
| 234 | if not account.checkPassword(credentials['password']): |
|---|
| 235 | return None |
|---|
| 236 | return KofaPrincipalInfo( |
|---|
| 237 | id=account.name, |
|---|
| 238 | title=account.title, |
|---|
| 239 | description=account.description, |
|---|
| 240 | email=account.email, |
|---|
| 241 | phone=account.phone, |
|---|
| 242 | public_name=account.public_name, |
|---|
| 243 | user_type=u'user') |
|---|
| 244 | |
|---|
| 245 | def principalInfo(self, id): |
|---|
| 246 | account = self.getAccount(id) |
|---|
| 247 | if account is None: |
|---|
| 248 | return None |
|---|
| 249 | return KofaPrincipalInfo( |
|---|
| 250 | id=account.name, |
|---|
| 251 | title=account.title, |
|---|
| 252 | description=account.description, |
|---|
| 253 | email=account.email, |
|---|
| 254 | phone=account.phone, |
|---|
| 255 | public_name=account.public_name, |
|---|
| 256 | user_type=u'user') |
|---|
| 257 | |
|---|
| 258 | def getAccount(self, login): |
|---|
| 259 | # ... look up the account object and return it ... |
|---|
| 260 | userscontainer = self.getUsersContainer() |
|---|
| 261 | if userscontainer is None: |
|---|
| 262 | return |
|---|
| 263 | return userscontainer.get(login, None) |
|---|
| 264 | |
|---|
| 265 | def addAccount(self, account): |
|---|
| 266 | userscontainer = self.getUsersContainer() |
|---|
| 267 | if userscontainer is None: |
|---|
| 268 | return |
|---|
| 269 | # XXX: complain if name already exists... |
|---|
| 270 | userscontainer.addAccount(account) |
|---|
| 271 | |
|---|
| 272 | def addUser(self, name, password, title=None, description=None): |
|---|
| 273 | userscontainer = self.getUsersContainer() |
|---|
| 274 | if userscontainer is None: |
|---|
| 275 | return |
|---|
| 276 | userscontainer.addUser(name, password, title, description) |
|---|
| 277 | |
|---|
| 278 | def getUsersContainer(self): |
|---|
| 279 | site = grok.getSite() |
|---|
| 280 | return site['users'] |
|---|
| 281 | |
|---|
| 282 | class PasswordValidator(grok.GlobalUtility): |
|---|
| 283 | |
|---|
| 284 | grok.implements(IPasswordValidator) |
|---|
| 285 | |
|---|
| 286 | def validate_password(self, pw, pw_repeat): |
|---|
| 287 | errors = [] |
|---|
| 288 | if len(pw) < 3: |
|---|
| 289 | errors.append('Password must have at least 3 chars.') |
|---|
| 290 | if pw != pw_repeat: |
|---|
| 291 | errors.append('Passwords do not match.') |
|---|
| 292 | return errors |
|---|
| 293 | |
|---|
| 294 | class LocalRoleSetEvent(object): |
|---|
| 295 | |
|---|
| 296 | grok.implements(ILocalRoleSetEvent) |
|---|
| 297 | |
|---|
| 298 | def __init__(self, object, role_id, principal_id, granted=True): |
|---|
| 299 | self.object = object |
|---|
| 300 | self.role_id = role_id |
|---|
| 301 | self.principal_id = principal_id |
|---|
| 302 | self.granted = granted |
|---|
| 303 | |
|---|
| 304 | @grok.subscribe(IUserAccount, grok.IObjectRemovedEvent) |
|---|
| 305 | def handle_account_removed(account, event): |
|---|
| 306 | """When an account is removed, local roles might have to be deleted. |
|---|
| 307 | """ |
|---|
| 308 | local_roles = account.getLocalRoles() |
|---|
| 309 | principal = account.name |
|---|
| 310 | for role_id, object_list in local_roles.items(): |
|---|
| 311 | for object in object_list: |
|---|
| 312 | try: |
|---|
| 313 | role_manager = IPrincipalRoleManager(object) |
|---|
| 314 | except TypeError: |
|---|
| 315 | # No role manager, no roles to remove |
|---|
| 316 | continue |
|---|
| 317 | role_manager.unsetRoleForPrincipal(role_id, principal) |
|---|
| 318 | return |
|---|
| 319 | |
|---|
| 320 | @grok.subscribe(IUserAccount, grok.IObjectAddedEvent) |
|---|
| 321 | def handle_account_added(account, event): |
|---|
| 322 | """When an account is added, the local owner role and the global |
|---|
| 323 | AcademicsOfficer role must be set. |
|---|
| 324 | """ |
|---|
| 325 | # We set the local Owner role |
|---|
| 326 | role_manager_account = IPrincipalRoleManager(account) |
|---|
| 327 | role_manager_account.assignRoleToPrincipal( |
|---|
| 328 | 'waeup.local.Owner', account.name) |
|---|
| 329 | # We set the global AcademicsOfficer role |
|---|
| 330 | site = grok.getSite() |
|---|
| 331 | role_manager_site = IPrincipalRoleManager(site) |
|---|
| 332 | role_manager_site.assignRoleToPrincipal( |
|---|
| 333 | 'waeup.AcademicsOfficer', account.name) |
|---|
| 334 | # Finally we have to notify the user account that the local role |
|---|
| 335 | # of the same object has changed |
|---|
| 336 | notify(LocalRoleSetEvent( |
|---|
| 337 | account, 'waeup.local.Owner', account.name, granted=True)) |
|---|
| 338 | return |
|---|
| 339 | |
|---|
| 340 | @grok.subscribe(Interface, ILocalRoleSetEvent) |
|---|
| 341 | def handle_local_role_changed(obj, event): |
|---|
| 342 | site = grok.getSite() |
|---|
| 343 | if site is None: |
|---|
| 344 | return |
|---|
| 345 | users = site.get('users', None) |
|---|
| 346 | if users is None: |
|---|
| 347 | return |
|---|
| 348 | if event.principal_id not in users.keys(): |
|---|
| 349 | return |
|---|
| 350 | user = users[event.principal_id] |
|---|
| 351 | user.notifyLocalRoleChanged(event.object, event.role_id, event.granted) |
|---|
| 352 | return |
|---|
| 353 | |
|---|
| 354 | @grok.subscribe(Interface, grok.IObjectRemovedEvent) |
|---|
| 355 | def handle_local_roles_on_obj_removed(obj, event): |
|---|
| 356 | try: |
|---|
| 357 | role_map = IPrincipalRoleMap(obj) |
|---|
| 358 | except TypeError: |
|---|
| 359 | # no map, no roles to remove |
|---|
| 360 | return |
|---|
| 361 | for local_role, user_name, setting in role_map.getPrincipalsAndRoles(): |
|---|
| 362 | notify(LocalRoleSetEvent( |
|---|
| 363 | obj, local_role, user_name, granted=False)) |
|---|
| 364 | return |
|---|
| 365 | |
|---|
| 366 | class UsersPlugin(grok.GlobalUtility): |
|---|
| 367 | """A plugin that updates users. |
|---|
| 368 | """ |
|---|
| 369 | |
|---|
| 370 | grok.implements(IKofaPluggable) |
|---|
| 371 | grok.name('users') |
|---|
| 372 | |
|---|
| 373 | deprecated_attributes = [] |
|---|
| 374 | |
|---|
| 375 | def setup(self, site, name, logger): |
|---|
| 376 | return |
|---|
| 377 | |
|---|
| 378 | def update(self, site, name, logger): |
|---|
| 379 | users = site['users'] |
|---|
| 380 | items = getFields(IUserAccount).items() |
|---|
| 381 | for user in users.values(): |
|---|
| 382 | # Add new attributes |
|---|
| 383 | for i in items: |
|---|
| 384 | if not hasattr(user,i[0]): |
|---|
| 385 | setattr(user,i[0],i[1].missing_value) |
|---|
| 386 | logger.info( |
|---|
| 387 | 'UsersPlugin: %s attribute %s added.' % ( |
|---|
| 388 | user.name,i[0])) |
|---|
| 389 | # Remove deprecated attributes |
|---|
| 390 | for i in self.deprecated_attributes: |
|---|
| 391 | try: |
|---|
| 392 | delattr(user,i) |
|---|
| 393 | logger.info( |
|---|
| 394 | 'UsersPlugin: %s attribute %s deleted.' % ( |
|---|
| 395 | user.name,i)) |
|---|
| 396 | except AttributeError: |
|---|
| 397 | pass |
|---|
| 398 | return |
|---|
