author | Sylvain Thénault <sylvain.thenault@logilab.fr> |
Wed, 05 May 2010 18:10:33 +0200 | |
changeset 5473 | ee87c5352e63 |
parent 5449 | a7e1b316af03 |
child 5557 | 1a534c596bff |
child 5670 | 80dc2135bf5f |
permissions | -rw-r--r-- |
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# copyright 2003-2010 LOGILAB S.A. (Paris, FRANCE), all rights reserved. |
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# contact http://www.logilab.fr/ -- mailto:contact@logilab.fr |
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# |
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# This file is part of CubicWeb. |
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# |
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# CubicWeb is free software: you can redistribute it and/or modify it under the |
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# terms of the GNU Lesser General Public License as published by the Free |
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# Software Foundation, either version 2.1 of the License, or (at your option) |
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# any later version. |
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# |
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# CubicWeb is distributed in the hope that it will be useful, but WITHOUT |
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# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS |
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# FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more |
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# details. |
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# |
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# You should have received a copy of the GNU Lesser General Public License along |
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# with CubicWeb. If not, see <http://www.gnu.org/licenses/>. |
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"""Security hooks: check permissions to add/delete/update entities according to |
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the user connected to a session |
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""" |
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__docformat__ = "restructuredtext en" |
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from cubicweb import Unauthorized |
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from cubicweb.selectors import objectify_selector, lltrace |
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from cubicweb.server import BEFORE_ADD_RELATIONS, ON_COMMIT_ADD_RELATIONS, hook |
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def check_entity_attributes(session, entity, editedattrs=None): |
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eid = entity.eid |
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eschema = entity.e_schema |
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# .skip_security_attributes is there to bypass security for attributes |
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# set by hooks by modifying the entity's dictionnary |
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dontcheck = entity.skip_security_attributes |
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if editedattrs is None: |
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try: |
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editedattrs = entity.edited_attributes |
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except AttributeError: |
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editedattrs = entity # XXX unexpected |
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for attr in editedattrs: |
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if attr in dontcheck: |
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continue |
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rdef = eschema.rdef(attr) |
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if rdef.final: # non final relation are checked by other hooks |
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# add/delete should be equivalent (XXX: unify them into 'update' ?) |
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rdef.check_perm(session, 'update', eid=eid) |
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# don't update dontcheck until everything went fine: see usage in |
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# after_update_entity, where if we got an Unauthorized at hook time, we will |
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# retry and commit time |
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dontcheck |= frozenset(editedattrs) |
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class _CheckEntityPermissionOp(hook.LateOperation): |
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def precommit_event(self): |
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#print 'CheckEntityPermissionOp', self.session.user, self.entity, self.action |
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session = self.session |
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for values in session.transaction_data.pop('check_entity_perm_op'): |
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entity = session.entity_from_eid(values[0]) |
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action = values[1] |
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entity.check_perm(action) |
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check_entity_attributes(session, entity, values[2:]) |
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def commit_event(self): |
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pass |
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class _CheckRelationPermissionOp(hook.LateOperation): |
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def precommit_event(self): |
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rdef = self.rschema.rdef(self.session.describe(self.eidfrom)[0], |
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self.session.describe(self.eidto)[0]) |
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rdef.check_perm(self.session, self.action, |
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fromeid=self.eidfrom, toeid=self.eidto) |
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def commit_event(self): |
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pass |
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@objectify_selector |
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@lltrace |
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def write_security_enabled(cls, req, **kwargs): |
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if req is None or not req.write_security: |
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return 0 |
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return 1 |
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class SecurityHook(hook.Hook): |
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__abstract__ = True |
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category = 'security' |
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__select__ = hook.Hook.__select__ & write_security_enabled() |
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class AfterAddEntitySecurityHook(SecurityHook): |
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__regid__ = 'securityafteraddentity' |
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events = ('after_add_entity',) |
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def __call__(self): |
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hook.set_operation(self._cw, 'check_entity_perm_op', |
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(self.entity.eid, 'add') + tuple(self.entity.edited_attributes), |
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_CheckEntityPermissionOp) |
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class AfterUpdateEntitySecurityHook(SecurityHook): |
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__regid__ = 'securityafterupdateentity' |
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events = ('after_update_entity',) |
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def __call__(self): |
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try: |
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# check user has permission right now, if not retry at commit time |
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self.entity.check_perm('update') |
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check_entity_attributes(self._cw, self.entity) |
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except Unauthorized: |
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111 |
self.entity.clear_local_perm_cache('update') |
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112 |
# save back editedattrs in case the entity is reedited later in the |
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113 |
# same transaction, which will lead to edited_attributes being |
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114 |
# overwritten |
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115 |
hook.set_operation(self._cw, 'check_entity_perm_op', |
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116 |
(self.entity.eid, 'update') + tuple(self.entity.edited_attributes), |
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117 |
_CheckEntityPermissionOp) |
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|
119 |
||
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120 |
class BeforeDelEntitySecurityHook(SecurityHook): |
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121 |
__regid__ = 'securitybeforedelentity' |
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122 |
events = ('before_delete_entity',) |
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123 |
|
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124 |
def __call__(self): |
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125 |
self.entity.check_perm('delete') |
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126 |
|
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delete-trailing-whitespace + some copyright update
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127 |
|
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128 |
class BeforeAddRelationSecurityHook(SecurityHook): |
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129 |
__regid__ = 'securitybeforeaddrelation' |
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130 |
events = ('before_add_relation',) |
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131 |
|
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132 |
def __call__(self): |
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133 |
if self.rtype in BEFORE_ADD_RELATIONS: |
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134 |
nocheck = self._cw.transaction_data.get('skip-security', ()) |
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135 |
if (self.eidfrom, self.rtype, self.eidto) in nocheck: |
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136 |
return |
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137 |
rschema = self._cw.repo.schema[self.rtype] |
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138 |
rdef = rschema.rdef(self._cw.describe(self.eidfrom)[0], |
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139 |
self._cw.describe(self.eidto)[0]) |
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140 |
rdef.check_perm(self._cw, 'add', fromeid=self.eidfrom, toeid=self.eidto) |
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141 |
|
0 | 142 |
|
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143 |
class AfterAddRelationSecurityHook(SecurityHook): |
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144 |
__regid__ = 'securityafteraddrelation' |
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145 |
events = ('after_add_relation',) |
0 | 146 |
|
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147 |
def __call__(self): |
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148 |
if not self.rtype in BEFORE_ADD_RELATIONS: |
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149 |
nocheck = self._cw.transaction_data.get('skip-security', ()) |
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150 |
if (self.eidfrom, self.rtype, self.eidto) in nocheck: |
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151 |
return |
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152 |
rschema = self._cw.repo.schema[self.rtype] |
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153 |
if self.rtype in ON_COMMIT_ADD_RELATIONS: |
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154 |
_CheckRelationPermissionOp(self._cw, action='add', |
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155 |
rschema=rschema, |
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156 |
eidfrom=self.eidfrom, |
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157 |
eidto=self.eidto) |
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158 |
else: |
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|
159 |
rdef = rschema.rdef(self._cw.describe(self.eidfrom)[0], |
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160 |
self._cw.describe(self.eidto)[0]) |
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161 |
rdef.check_perm(self._cw, 'add', fromeid=self.eidfrom, toeid=self.eidto) |
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|
162 |
|
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|
163 |
|
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164 |
class BeforeDeleteRelationSecurityHook(SecurityHook): |
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165 |
__regid__ = 'securitybeforedelrelation' |
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166 |
events = ('before_delete_relation',) |
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|
167 |
|
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168 |
def __call__(self): |
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|
169 |
nocheck = self._cw.transaction_data.get('skip-security', ()) |
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|
170 |
if (self.eidfrom, self.rtype, self.eidto) in nocheck: |
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|
171 |
return |
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|
172 |
rschema = self._cw.repo.schema[self.rtype] |
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|
173 |
rdef = rschema.rdef(self._cw.describe(self.eidfrom)[0], |
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|
174 |
self._cw.describe(self.eidto)[0]) |
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|
175 |
rdef.check_perm(self._cw, 'delete', fromeid=self.eidfrom, toeid=self.eidto) |
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|
176 |