author | Julien Cristau <julien.cristau@logilab.fr> |
Wed, 05 Mar 2014 11:22:20 +0100 | |
changeset 9575 | 754904ac4248 |
parent 9543 | 39f981482e34 |
child 9612 | 24460d4d64bf |
permissions | -rw-r--r-- |
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# copyright 2003-2013 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 warnings import warn |
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from logilab.common.registry import objectify_predicate |
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from yams import buildobjs |
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from cubicweb import Unauthorized |
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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, action, editedattrs=None): |
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eid = entity.eid |
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eschema = entity.e_schema |
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# ._cw_skip_security_attributes is there to bypass security for attributes |
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# set by hooks by modifying the entity's dictionary |
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if editedattrs is None: |
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editedattrs = entity.cw_edited |
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dontcheck = editedattrs.skip_security |
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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, takefirst=True) |
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if rdef.final: # non final relation are checked by standard hooks |
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perms = rdef.permissions.get(action) |
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# comparison below works because the default update perm is: |
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# |
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# ('managers', ERQLExpression(Any X WHERE U has_update_permission X, |
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# X eid %(x)s, U eid %(u)s)) |
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# |
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# is deserialized in this order (groups first), and ERQLExpression |
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# implements comparison by rql expression. |
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if perms == buildobjs.DEFAULT_ATTRPERMS[action]: |
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# The default rule is to delegate to the entity |
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# rule. This is an historical artefact. Hence we take |
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# this object as a marker saying "no specific" |
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# permission rule for this attribute. Thus we just do |
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# nothing. |
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continue |
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if perms == (): |
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# That means an immutable attribute; as an optimization, avoid |
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# going through check_perm. |
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raise Unauthorized(action, str(rdef)) |
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rdef.check_perm(session, action, eid=eid) |
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class CheckEntityPermissionOp(hook.DataOperationMixIn, hook.LateOperation): |
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def precommit_event(self): |
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session = self.session |
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for eid, action, edited in self.get_data(): |
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entity = session.entity_from_eid(eid) |
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entity.cw_check_perm(action) |
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check_entity_attributes(session, entity, action, edited) |
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class CheckRelationPermissionOp(hook.DataOperationMixIn, hook.LateOperation): |
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def precommit_event(self): |
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session = self.session |
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for action, rschema, eidfrom, eidto in self.get_data(): |
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rdef = rschema.rdef(session.entity_metas(eidfrom)['type'], |
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session.entity_metas(eidto)['type']) |
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rdef.check_perm(session, action, fromeid=eidfrom, toeid=eidto) |
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@objectify_predicate |
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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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103 |
def __call__(self): |
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104 |
CheckEntityPermissionOp.get_instance(self._cw).add_data( |
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105 |
(self.entity.eid, 'add', self.entity.cw_edited) ) |
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|
106 |
|
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|
107 |
|
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108 |
class AfterUpdateEntitySecurityHook(SecurityHook): |
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109 |
__regid__ = 'securityafterupdateentity' |
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110 |
events = ('after_update_entity',) |
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|
111 |
|
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112 |
def __call__(self): |
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113 |
# save back editedattrs in case the entity is reedited later in the |
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114 |
# same transaction, which will lead to cw_edited being |
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|
115 |
# overwritten |
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116 |
CheckEntityPermissionOp.get_instance(self._cw).add_data( |
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117 |
(self.entity.eid, 'update', self.entity.cw_edited) ) |
0 | 118 |
|
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.cw_check_perm('delete') |
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126 |
|
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delete-trailing-whitespace + some copyright update
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
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diff
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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.entity_metas(self.eidfrom)['type'], |
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|
139 |
self._cw.entity_metas(self.eidto)['type']) |
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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: |
6426
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[hook/operation] nicer api to achieve same result as set_operation, as described in #1253630
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents:
6142
diff
changeset
|
154 |
CheckRelationPermissionOp.get_instance(self._cw).add_data( |
541659c39f6a
[hook/operation] nicer api to achieve same result as set_operation, as described in #1253630
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents:
6142
diff
changeset
|
155 |
('add', rschema, self.eidfrom, self.eidto) ) |
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|
156 |
else: |
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|
157 |
rdef = rschema.rdef(self._cw.entity_metas(self.eidfrom)['type'], |
032825bbacab
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parents:
9395
diff
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|
158 |
self._cw.entity_metas(self.eidto)['type']) |
4003
b9436fe77c9e
fix bad merge
Sandrine Ribeau <sandrine.ribeau@logilab.fr>
parents:
3890
diff
changeset
|
159 |
rdef.check_perm(self._cw, 'add', fromeid=self.eidfrom, toeid=self.eidto) |
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|
160 |
|
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|
161 |
|
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|
162 |
class BeforeDeleteRelationSecurityHook(SecurityHook): |
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|
163 |
__regid__ = 'securitybeforedelrelation' |
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|
164 |
events = ('before_delete_relation',) |
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|
165 |
|
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|
166 |
def __call__(self): |
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parents:
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|
167 |
nocheck = self._cw.transaction_data.get('skip-security', ()) |
12c4f7e2bed6
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Sylvain Thénault <sylvain.thenault@logilab.fr>
parents:
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diff
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|
168 |
if (self.eidfrom, self.rtype, self.eidto) in nocheck: |
12c4f7e2bed6
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parents:
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diff
changeset
|
169 |
return |
12c4f7e2bed6
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parents:
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|
170 |
rschema = self._cw.repo.schema[self.rtype] |
9469
032825bbacab
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Sylvain Thénault <sylvain.thenault@logilab.fr>
parents:
9395
diff
changeset
|
171 |
rdef = rschema.rdef(self._cw.entity_metas(self.eidfrom)['type'], |
032825bbacab
[multi-sources-removal] Drop entities.source column
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents:
9395
diff
changeset
|
172 |
self._cw.entity_metas(self.eidto)['type']) |
4190
742e3eb16f81
fix bad merge
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents:
4048
diff
changeset
|
173 |
rdef.check_perm(self._cw, 'delete', fromeid=self.eidfrom, toeid=self.eidto) |
4048
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parents:
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changeset
|
174 |