1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
|
# Copyright 2012 OpenStack Foundation
# All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
from glance.common import exception
import glance.domain.proxy
def is_image_mutable(context, image):
"""Return True if the image is mutable in this context."""
if context.is_admin:
return True
if image.owner is None or context.owner is None:
return False
return image.owner == context.owner
def proxy_image(context, image):
if is_image_mutable(context, image):
return ImageProxy(image, context)
else:
return ImmutableImageProxy(image, context)
def is_member_mutable(context, member):
"""Return True if the image is mutable in this context."""
if context.is_admin:
return True
if context.owner is None:
return False
return member.member_id == context.owner
def proxy_member(context, member):
if is_member_mutable(context, member):
return member
else:
return ImmutableMemberProxy(member)
class ImageRepoProxy(glance.domain.proxy.Repo):
def __init__(self, image_repo, context):
self.context = context
self.image_repo = image_repo
proxy_kwargs = {'context': self.context}
super(ImageRepoProxy, self).__init__(image_repo,
item_proxy_class=ImageProxy,
item_proxy_kwargs=proxy_kwargs)
def get(self, image_id):
image = self.image_repo.get(image_id)
return proxy_image(self.context, image)
def list(self, *args, **kwargs):
images = self.image_repo.list(*args, **kwargs)
return [proxy_image(self.context, i) for i in images]
class ImageMemberRepoProxy(glance.domain.proxy.Repo):
def __init__(self, member_repo, image, context):
self.member_repo = member_repo
self.image = image
self.context = context
super(ImageMemberRepoProxy, self).__init__(member_repo)
def get(self, member_id):
if (self.context.is_admin or
self.context.owner == self.image.owner or
self.context.owner == member_id):
member = self.member_repo.get(member_id)
return proxy_member(self.context, member)
else:
message = _("You cannot get image member for %s")
raise exception.Forbidden(message % member_id)
def list(self, *args, **kwargs):
members = self.member_repo.list(*args, **kwargs)
if (self.context.is_admin or
self.context.owner == self.image.owner):
return [proxy_member(self.context, m) for m in members]
for member in members:
if member.member_id == self.context.owner:
return [proxy_member(self.context, member)]
message = _("You cannot get image member for %s")
raise exception.Forbidden(message % self.image.image_id)
def remove(self, image_member):
if (self.image.owner == self.context.owner or
self.context.is_admin):
self.member_repo.remove(image_member)
else:
message = _("You cannot delete image member for %s")
raise exception.Forbidden(message
% self.image.image_id)
def add(self, image_member):
if (self.image.owner == self.context.owner or
self.context.is_admin):
return self.member_repo.add(image_member)
else:
message = _("You cannot add image member for %s")
raise exception.Forbidden(message
% self.image.image_id)
def save(self, image_member):
if (self.context.is_admin or
self.context.owner == image_member.member_id):
updated_member = self.member_repo.save(image_member)
return proxy_member(self.context, updated_member)
else:
message = _("You cannot update image member %s")
raise exception.Forbidden(message % image_member.member_id)
class ImageFactoryProxy(glance.domain.proxy.ImageFactory):
def __init__(self, image_factory, context):
self.image_factory = image_factory
self.context = context
kwargs = {'context': self.context}
super(ImageFactoryProxy, self).__init__(image_factory,
proxy_class=ImageProxy,
proxy_kwargs=kwargs)
def new_image(self, **kwargs):
owner = kwargs.pop('owner', self.context.owner)
if not self.context.is_admin:
if owner is None or owner != self.context.owner:
message = _("You are not permitted to create images "
"owned by '%s'.")
raise exception.Forbidden(message % owner)
return super(ImageFactoryProxy, self).new_image(owner=owner, **kwargs)
class ImageMemberFactoryProxy(object):
def __init__(self, image_member_factory, context):
self.image_member_factory = image_member_factory
self.context = context
def new_image_member(self, image, member_id):
owner = image.owner
if not self.context.is_admin:
if owner is None or owner != self.context.owner:
message = _("You are not permitted to create image members "
"for the image.")
raise exception.Forbidden(message)
if image.visibility == 'public':
message = _("Public images do not have members.")
raise exception.Forbidden(message)
return self.image_member_factory.new_image_member(image, member_id)
def _immutable_attr(target, attr, proxy=None):
def get_attr(self):
value = getattr(getattr(self, target), attr)
if proxy is not None:
value = proxy(value)
return value
def forbidden(self, *args, **kwargs):
message = _("You are not permitted to modify '%s' on this image.")
raise exception.Forbidden(message % attr)
return property(get_attr, forbidden, forbidden)
class ImmutableLocations(list):
def forbidden(self, *args, **kwargs):
message = _("You are not permitted to modify locations "
"for this image.")
raise exception.Forbidden(message)
append = forbidden
extend = forbidden
insert = forbidden
pop = forbidden
remove = forbidden
reverse = forbidden
sort = forbidden
__delitem__ = forbidden
__delslice__ = forbidden
__iadd__ = forbidden
__imul__ = forbidden
__setitem__ = forbidden
__setslice__ = forbidden
class ImmutableProperties(dict):
def forbidden_key(self, key, *args, **kwargs):
message = _("You are not permitted to modify '%s' on this image.")
raise exception.Forbidden(message % key)
def forbidden(self, *args, **kwargs):
message = _("You are not permitted to modify this image.")
raise exception.Forbidden(message)
__delitem__ = forbidden_key
__setitem__ = forbidden_key
pop = forbidden
popitem = forbidden
setdefault = forbidden
update = forbidden
class ImmutableTags(set):
def forbidden(self, *args, **kwargs):
message = _("You are not permitted to modify tags on this image.")
raise exception.Forbidden(message)
add = forbidden
clear = forbidden
difference_update = forbidden
intersection_update = forbidden
pop = forbidden
remove = forbidden
symmetric_difference_update = forbidden
update = forbidden
class ImmutableImageProxy(object):
def __init__(self, base, context):
self.base = base
self.context = context
name = _immutable_attr('base', 'name')
image_id = _immutable_attr('base', 'image_id')
name = _immutable_attr('base', 'name')
status = _immutable_attr('base', 'status')
created_at = _immutable_attr('base', 'created_at')
updated_at = _immutable_attr('base', 'updated_at')
visibility = _immutable_attr('base', 'visibility')
min_disk = _immutable_attr('base', 'min_disk')
min_ram = _immutable_attr('base', 'min_ram')
protected = _immutable_attr('base', 'protected')
locations = _immutable_attr('base', 'locations', proxy=ImmutableLocations)
checksum = _immutable_attr('base', 'checksum')
owner = _immutable_attr('base', 'owner')
disk_format = _immutable_attr('base', 'disk_format')
container_format = _immutable_attr('base', 'container_format')
size = _immutable_attr('base', 'size')
extra_properties = _immutable_attr('base', 'extra_properties',
proxy=ImmutableProperties)
tags = _immutable_attr('base', 'tags', proxy=ImmutableTags)
def delete(self):
message = _("You are not permitted to delete this image.")
raise exception.Forbidden(message)
def get_member_repo(self):
member_repo = self.base.get_member_repo()
return ImageMemberRepoProxy(member_repo, self, self.context)
def get_data(self):
return self.base.get_data()
def set_data(self, *args, **kwargs):
message = _("You are not permitted to upload data for this image.")
raise exception.Forbidden(message)
class ImmutableMemberProxy(object):
def __init__(self, base):
self.base = base
id = _immutable_attr('base', 'id')
image_id = _immutable_attr('base', 'image_id')
member_id = _immutable_attr('base', 'member_id')
status = _immutable_attr('base', 'status')
created_at = _immutable_attr('base', 'created_at')
updated_at = _immutable_attr('base', 'updated_at')
class ImageProxy(glance.domain.proxy.Image):
def __init__(self, image, context):
self.image = image
self.context = context
super(ImageProxy, self).__init__(image)
def get_member_repo(self, **kwargs):
if self.image.visibility == 'public':
message = _("Public images do not have members.")
raise exception.Forbidden(message)
else:
member_repo = self.image.get_member_repo(**kwargs)
return ImageMemberRepoProxy(member_repo, self, self.context)
|