root / snf-pithos-backend / pithos / backends / lib / sqlalchemy / permissions.py @ 96090728
History | View | Annotate | Download (7.7 kB)
1 | 2e662088 | Antony Chazapis | # Copyright 2011-2012 GRNET S.A. All rights reserved.
|
---|---|---|---|
2 | 2715ade4 | Sofia Papagiannaki | #
|
3 | 4f917833 | Sofia Papagiannaki | # Redistribution and use in source and binary forms, with or
|
4 | 4f917833 | Sofia Papagiannaki | # without modification, are permitted provided that the following
|
5 | 4f917833 | Sofia Papagiannaki | # conditions are met:
|
6 | 2715ade4 | Sofia Papagiannaki | #
|
7 | 4f917833 | Sofia Papagiannaki | # 1. Redistributions of source code must retain the above
|
8 | 4f917833 | Sofia Papagiannaki | # copyright notice, this list of conditions and the following
|
9 | 4f917833 | Sofia Papagiannaki | # disclaimer.
|
10 | 2715ade4 | Sofia Papagiannaki | #
|
11 | 4f917833 | Sofia Papagiannaki | # 2. Redistributions in binary form must reproduce the above
|
12 | 4f917833 | Sofia Papagiannaki | # copyright notice, this list of conditions and the following
|
13 | 4f917833 | Sofia Papagiannaki | # disclaimer in the documentation and/or other materials
|
14 | 4f917833 | Sofia Papagiannaki | # provided with the distribution.
|
15 | 2715ade4 | Sofia Papagiannaki | #
|
16 | 4f917833 | Sofia Papagiannaki | # THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS
|
17 | 4f917833 | Sofia Papagiannaki | # OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
|
18 | 4f917833 | Sofia Papagiannaki | # WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
|
19 | 4f917833 | Sofia Papagiannaki | # PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A OR
|
20 | 4f917833 | Sofia Papagiannaki | # CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
21 | 4f917833 | Sofia Papagiannaki | # SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
|
22 | 4f917833 | Sofia Papagiannaki | # LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
|
23 | 4f917833 | Sofia Papagiannaki | # USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
|
24 | 4f917833 | Sofia Papagiannaki | # AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
25 | 4f917833 | Sofia Papagiannaki | # LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
|
26 | 4f917833 | Sofia Papagiannaki | # ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
27 | 4f917833 | Sofia Papagiannaki | # POSSIBILITY OF SUCH DAMAGE.
|
28 | 2715ade4 | Sofia Papagiannaki | #
|
29 | 4f917833 | Sofia Papagiannaki | # The views and conclusions contained in the software and
|
30 | 4f917833 | Sofia Papagiannaki | # documentation are those of the authors and should not be
|
31 | 4f917833 | Sofia Papagiannaki | # interpreted as representing official policies, either expressed
|
32 | 4f917833 | Sofia Papagiannaki | # or implied, of GRNET S.A.
|
33 | 4f917833 | Sofia Papagiannaki | |
34 | a63f36a2 | Sofia Papagiannaki | from sqlalchemy.sql import select, literal, or_ |
35 | 4f1bc0a6 | Sofia Papagiannaki | from sqlalchemy.sql.expression import join, union |
36 | 4f917833 | Sofia Papagiannaki | |
37 | 4f917833 | Sofia Papagiannaki | from xfeatures import XFeatures |
38 | 4f917833 | Sofia Papagiannaki | from groups import Groups |
39 | 4f917833 | Sofia Papagiannaki | from public import Public |
40 | a63f36a2 | Sofia Papagiannaki | from node import Node |
41 | 4f917833 | Sofia Papagiannaki | |
42 | 235a4227 | Sofia Papagiannaki | from dbworker import ESCAPE_CHAR |
43 | 235a4227 | Sofia Papagiannaki | |
44 | 4f917833 | Sofia Papagiannaki | |
45 | 4f917833 | Sofia Papagiannaki | READ = 0
|
46 | 4f917833 | Sofia Papagiannaki | WRITE = 1
|
47 | 4f917833 | Sofia Papagiannaki | |
48 | 4f917833 | Sofia Papagiannaki | |
49 | a63f36a2 | Sofia Papagiannaki | class Permissions(XFeatures, Groups, Public, Node): |
50 | 2715ade4 | Sofia Papagiannaki | |
51 | 4f917833 | Sofia Papagiannaki | def __init__(self, **params): |
52 | 4f917833 | Sofia Papagiannaki | XFeatures.__init__(self, **params)
|
53 | 4f917833 | Sofia Papagiannaki | Groups.__init__(self, **params)
|
54 | 4f917833 | Sofia Papagiannaki | Public.__init__(self, **params)
|
55 | a63f36a2 | Sofia Papagiannaki | Node.__init__(self, **params)
|
56 | 2715ade4 | Sofia Papagiannaki | |
57 | 4f917833 | Sofia Papagiannaki | def access_grant(self, path, access, members=()): |
58 | 4f917833 | Sofia Papagiannaki | """Grant members with access to path.
|
59 | 4f917833 | Sofia Papagiannaki | Members can also be '*' (all),
|
60 | 4f917833 | Sofia Papagiannaki | or some group specified as 'owner:group'."""
|
61 | 2715ade4 | Sofia Papagiannaki | |
62 | 4f917833 | Sofia Papagiannaki | if not members: |
63 | 4f917833 | Sofia Papagiannaki | return
|
64 | 4f917833 | Sofia Papagiannaki | feature = self.xfeature_create(path)
|
65 | 4f917833 | Sofia Papagiannaki | self.feature_setmany(feature, access, members)
|
66 | 2715ade4 | Sofia Papagiannaki | |
67 | 4f917833 | Sofia Papagiannaki | def access_set(self, path, permissions): |
68 | 4f917833 | Sofia Papagiannaki | """Set permissions for path. The permissions dict
|
69 | 4f917833 | Sofia Papagiannaki | maps 'read', 'write' keys to member lists."""
|
70 | 2715ade4 | Sofia Papagiannaki | |
71 | cf341da4 | Antony Chazapis | r = permissions.get('read', [])
|
72 | cf341da4 | Antony Chazapis | w = permissions.get('write', [])
|
73 | cf341da4 | Antony Chazapis | if not r and not w: |
74 | cf341da4 | Antony Chazapis | self.xfeature_destroy(path)
|
75 | cf341da4 | Antony Chazapis | return
|
76 | cf341da4 | Antony Chazapis | feature = self.xfeature_create(path)
|
77 | 345dcf39 | Antony Chazapis | self.feature_clear(feature, READ)
|
78 | 345dcf39 | Antony Chazapis | self.feature_clear(feature, WRITE)
|
79 | cf341da4 | Antony Chazapis | if r:
|
80 | cf341da4 | Antony Chazapis | self.feature_setmany(feature, READ, r)
|
81 | cf341da4 | Antony Chazapis | if w:
|
82 | cf341da4 | Antony Chazapis | self.feature_setmany(feature, WRITE, w)
|
83 | 2715ade4 | Sofia Papagiannaki | |
84 | cf341da4 | Antony Chazapis | def access_get(self, path): |
85 | cf341da4 | Antony Chazapis | """Get permissions for path."""
|
86 | 2715ade4 | Sofia Papagiannaki | |
87 | cf341da4 | Antony Chazapis | feature = self.xfeature_get(path)
|
88 | cf341da4 | Antony Chazapis | if not feature: |
89 | cf341da4 | Antony Chazapis | return {}
|
90 | cf341da4 | Antony Chazapis | permissions = self.feature_dict(feature)
|
91 | cf341da4 | Antony Chazapis | if READ in permissions: |
92 | cf341da4 | Antony Chazapis | permissions['read'] = permissions[READ]
|
93 | cf341da4 | Antony Chazapis | del(permissions[READ])
|
94 | cf341da4 | Antony Chazapis | if WRITE in permissions: |
95 | cf341da4 | Antony Chazapis | permissions['write'] = permissions[WRITE]
|
96 | cf341da4 | Antony Chazapis | del(permissions[WRITE])
|
97 | cf341da4 | Antony Chazapis | return permissions
|
98 | 2715ade4 | Sofia Papagiannaki | |
99 | a74ba506 | Sofia Papagiannaki | def access_members(self, path): |
100 | a74ba506 | Sofia Papagiannaki | feature = self.xfeature_get(path)
|
101 | a74ba506 | Sofia Papagiannaki | if not feature: |
102 | a74ba506 | Sofia Papagiannaki | return []
|
103 | a74ba506 | Sofia Papagiannaki | permissions = self.feature_dict(feature)
|
104 | a74ba506 | Sofia Papagiannaki | members = set()
|
105 | a74ba506 | Sofia Papagiannaki | members.update(permissions.get(READ, [])) |
106 | a74ba506 | Sofia Papagiannaki | members.update(permissions.get(WRITE, [])) |
107 | a74ba506 | Sofia Papagiannaki | for m in set(members): |
108 | a74ba506 | Sofia Papagiannaki | parts = m.split(':', 1) |
109 | a74ba506 | Sofia Papagiannaki | if len(parts) != 2: |
110 | a74ba506 | Sofia Papagiannaki | continue
|
111 | a74ba506 | Sofia Papagiannaki | user, group = parts |
112 | a74ba506 | Sofia Papagiannaki | members.remove(m) |
113 | a74ba506 | Sofia Papagiannaki | members.update(self.group_members(user, group))
|
114 | a74ba506 | Sofia Papagiannaki | return list(members) |
115 | 2715ade4 | Sofia Papagiannaki | |
116 | 4f917833 | Sofia Papagiannaki | def access_clear(self, path): |
117 | 4f917833 | Sofia Papagiannaki | """Revoke access to path (both permissions and public)."""
|
118 | 2715ade4 | Sofia Papagiannaki | |
119 | 4f917833 | Sofia Papagiannaki | self.xfeature_destroy(path)
|
120 | 4f917833 | Sofia Papagiannaki | self.public_unset(path)
|
121 | 2715ade4 | Sofia Papagiannaki | |
122 | 8221c89d | Sofia Papagiannaki | def access_clear_bulk(self, paths): |
123 | 8221c89d | Sofia Papagiannaki | """Revoke access to path (both permissions and public)."""
|
124 | 2715ade4 | Sofia Papagiannaki | |
125 | 8221c89d | Sofia Papagiannaki | self.xfeature_destroy_bulk(paths)
|
126 | 8221c89d | Sofia Papagiannaki | self.public_unset_bulk(paths)
|
127 | 2715ade4 | Sofia Papagiannaki | |
128 | 4f917833 | Sofia Papagiannaki | def access_check(self, path, access, member): |
129 | 4f917833 | Sofia Papagiannaki | """Return true if the member has this access to the path."""
|
130 | 2715ade4 | Sofia Papagiannaki | |
131 | cf341da4 | Antony Chazapis | feature = self.xfeature_get(path)
|
132 | cf341da4 | Antony Chazapis | if not feature: |
133 | 4f917833 | Sofia Papagiannaki | return False |
134 | 4f917833 | Sofia Papagiannaki | members = self.feature_get(feature, access)
|
135 | 4f917833 | Sofia Papagiannaki | if member in members or '*' in members: |
136 | 4f917833 | Sofia Papagiannaki | return True |
137 | 4f917833 | Sofia Papagiannaki | for owner, group in self.group_parents(member): |
138 | 4f917833 | Sofia Papagiannaki | if owner + ':' + group in members: |
139 | 4f917833 | Sofia Papagiannaki | return True |
140 | 4f917833 | Sofia Papagiannaki | return False |
141 | 2715ade4 | Sofia Papagiannaki | |
142 | 4f917833 | Sofia Papagiannaki | def access_inherit(self, path): |
143 | cf341da4 | Antony Chazapis | """Return the paths influencing the access for path."""
|
144 | 2715ade4 | Sofia Papagiannaki | |
145 | d83c93c9 | Antony Chazapis | # r = self.xfeature_inherit(path)
|
146 | d83c93c9 | Antony Chazapis | # if not r:
|
147 | d83c93c9 | Antony Chazapis | # return []
|
148 | d83c93c9 | Antony Chazapis | # # Compute valid.
|
149 | d83c93c9 | Antony Chazapis | # return [x[0] for x in r if x[0] in valid]
|
150 | 2715ade4 | Sofia Papagiannaki | |
151 | cf341da4 | Antony Chazapis | # Only keep path components.
|
152 | cf341da4 | Antony Chazapis | parts = path.rstrip('/').split('/') |
153 | cf341da4 | Antony Chazapis | valid = [] |
154 | cf341da4 | Antony Chazapis | for i in range(1, len(parts)): |
155 | cf341da4 | Antony Chazapis | subp = '/'.join(parts[:i + 1]) |
156 | cf341da4 | Antony Chazapis | valid.append(subp) |
157 | d83c93c9 | Antony Chazapis | if subp != path:
|
158 | d83c93c9 | Antony Chazapis | valid.append(subp + '/')
|
159 | d83c93c9 | Antony Chazapis | return [x for x in valid if self.xfeature_get(x)] |
160 | 2715ade4 | Sofia Papagiannaki | |
161 | a63f36a2 | Sofia Papagiannaki | def access_list_paths(self, member, prefix=None, include_owned=False, |
162 | a63f36a2 | Sofia Papagiannaki | include_containers=True):
|
163 | a63f36a2 | Sofia Papagiannaki | """Return the list of paths granted to member.
|
164 | a63f36a2 | Sofia Papagiannaki |
|
165 | a63f36a2 | Sofia Papagiannaki | Keyword arguments:
|
166 | a63f36a2 | Sofia Papagiannaki | prefix -- return only paths starting with prefix (default None)
|
167 | a63f36a2 | Sofia Papagiannaki | include_owned -- return also paths owned by member (default False)
|
168 | a63f36a2 | Sofia Papagiannaki | include_containers -- return also container paths owned by member
|
169 | a63f36a2 | Sofia Papagiannaki | (default True)
|
170 | a63f36a2 | Sofia Papagiannaki |
|
171 | a63f36a2 | Sofia Papagiannaki | """
|
172 | 2715ade4 | Sofia Papagiannaki | |
173 | 2715ade4 | Sofia Papagiannaki | xfeatures_xfeaturevals = self.xfeatures.join(self.xfeaturevals) |
174 | 2715ade4 | Sofia Papagiannaki | |
175 | 4f917833 | Sofia Papagiannaki | selectable = (self.groups.c.owner + ':' + self.groups.c.name) |
176 | 4f917833 | Sofia Papagiannaki | member_groups = select([selectable.label('value')],
|
177 | 2715ade4 | Sofia Papagiannaki | self.groups.c.member == member)
|
178 | 2715ade4 | Sofia Papagiannaki | |
179 | 4f917833 | Sofia Papagiannaki | members = select([literal(member).label('value')])
|
180 | f992aa60 | Sofia Papagiannaki | any = select([literal('*').label('value')]) |
181 | 2715ade4 | Sofia Papagiannaki | |
182 | fe232f24 | Sofia Papagiannaki | u = union(member_groups, members, any).alias()
|
183 | 4f1bc0a6 | Sofia Papagiannaki | inner_join = join(xfeatures_xfeaturevals, u, |
184 | 2715ade4 | Sofia Papagiannaki | self.xfeaturevals.c.value == u.c.value)
|
185 | 4f917833 | Sofia Papagiannaki | s = select([self.xfeatures.c.path], from_obj=[inner_join]).distinct()
|
186 | 4f917833 | Sofia Papagiannaki | if prefix:
|
187 | 2715ade4 | Sofia Papagiannaki | s = s.where(self.xfeatures.c.path.like(
|
188 | 235a4227 | Sofia Papagiannaki | self.escape_like(prefix) + '%', escape=ESCAPE_CHAR |
189 | 235a4227 | Sofia Papagiannaki | )) |
190 | 4f917833 | Sofia Papagiannaki | r = self.conn.execute(s)
|
191 | 4f917833 | Sofia Papagiannaki | l = [row[0] for row in r.fetchall()] |
192 | 4f917833 | Sofia Papagiannaki | r.close() |
193 | a63f36a2 | Sofia Papagiannaki | |
194 | a63f36a2 | Sofia Papagiannaki | if include_owned:
|
195 | a63f36a2 | Sofia Papagiannaki | container_nodes = select( |
196 | a63f36a2 | Sofia Papagiannaki | [self.nodes.c.node],
|
197 | a63f36a2 | Sofia Papagiannaki | self.nodes.c.parent == self.node_lookup(member)) |
198 | a63f36a2 | Sofia Papagiannaki | condition = self.nodes.c.parent.in_(container_nodes)
|
199 | a63f36a2 | Sofia Papagiannaki | if include_containers:
|
200 | a63f36a2 | Sofia Papagiannaki | condition = or_(condition, |
201 | a63f36a2 | Sofia Papagiannaki | self.nodes.c.node.in_(container_nodes))
|
202 | a63f36a2 | Sofia Papagiannaki | s = select([self.nodes.c.path], condition)
|
203 | a63f36a2 | Sofia Papagiannaki | r = self.conn.execute(s)
|
204 | a63f36a2 | Sofia Papagiannaki | l += [row[0] for row in r.fetchall() if row[0] not in l] |
205 | a63f36a2 | Sofia Papagiannaki | r.close() |
206 | 4f917833 | Sofia Papagiannaki | return l
|
207 | 2715ade4 | Sofia Papagiannaki | |
208 | 4f917833 | Sofia Papagiannaki | def access_list_shared(self, prefix=''): |
209 | 4f917833 | Sofia Papagiannaki | """Return the list of shared paths."""
|
210 | 2715ade4 | Sofia Papagiannaki | |
211 | 4f917833 | Sofia Papagiannaki | s = select([self.xfeatures.c.path],
|
212 | 29148653 | Sofia Papagiannaki | self.xfeatures.c.path.like(
|
213 | 29148653 | Sofia Papagiannaki | self.escape_like(prefix) + '%', |
214 | 29148653 | Sofia Papagiannaki | escape=ESCAPE_CHAR)).order_by( |
215 | 29148653 | Sofia Papagiannaki | self.xfeatures.c.path.asc())
|
216 | 4f917833 | Sofia Papagiannaki | r = self.conn.execute(s)
|
217 | 4f917833 | Sofia Papagiannaki | l = [row[0] for row in r.fetchall()] |
218 | 4f917833 | Sofia Papagiannaki | r.close() |
219 | 937dc831 | Antony Chazapis | return l |