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
|
import json
import logging
import etcd
_log = logging.getLogger(__name__)
class EtcdAuthBase(object):
entity = 'example'
def __init__(self, client, name):
self.client = client
self.name = name
self.uri = "{}/auth/{}s/{}".format(self.client.version_prefix,
self.entity, self.name)
@property
def names(self):
key = "{}s".format(self.entity)
uri = "{}/auth/{}".format(self.client.version_prefix, key)
response = self.client.api_execute(uri, self.client._MGET)
return json.loads(response.data.decode('utf-8'))[key]
def read(self):
try:
response = self.client.api_execute(self.uri, self.client._MGET)
except etcd.EtcdInsufficientPermissions as e:
_log.error("Any action on the authorization requires the root role")
raise
except etcd.EtcdKeyNotFound:
_log.info("%s '%s' not found", self.entity, self.name)
raise
except Exception as e:
_log.error("Failed to fetch %s in %s%s: %r",
self.entity, self.client._base_uri,
self.client.version_prefix, e)
raise etcd.EtcdException(
"Could not fetch {} '{}'".format(self.entity, self.name))
self._from_net(response.data)
def write(self):
try:
r = self.__class__(self.client, self.name)
r.read()
except etcd.EtcdKeyNotFound:
r = None
try:
for payload in self._to_net(r):
response = self.client.api_execute_json(self.uri,
self.client._MPUT,
params=payload)
# This will fail if the response is an error
self._from_net(response.data)
except etcd.EtcdInsufficientPermissions as e:
_log.error("Any action on the authorization requires the root role")
raise
except Exception as e:
_log.error("Failed to write %s '%s'", self.entity, self.name)
# TODO: fine-grained exception handling
raise etcd.EtcdException(
"Could not write {} '{}': {}".format(self.entity,
self.name, e))
def delete(self):
try:
_ = self.client.api_execute(self.uri, self.client._MDELETE)
except etcd.EtcdInsufficientPermissions as e:
_log.error("Any action on the authorization requires the root role")
raise
except etcd.EtcdKeyNotFound:
_log.info("%s '%s' not found", self.entity, self.name)
raise
except Exception as e:
_log.error("Failed to delete %s in %s%s: %r",
self.entity, self._base_uri, self.version_prefix, e)
raise etcd.EtcdException(
"Could not delete {} '{}'".format(self.entity, self.name))
def _from_net(self, data):
raise NotImplementedError()
def _to_net(self, old=None):
raise NotImplementedError()
@classmethod
def new(cls, client, data):
c = cls(client, data[cls.entity])
c._from_net(data)
return c
class EtcdUser(EtcdAuthBase):
"""Class to manage in a orm-like way etcd users"""
entity = 'user'
def __init__(self, client, name):
super(EtcdUser, self).__init__(client, name)
self._roles = set()
self._password = None
def _from_net(self, data):
d = json.loads(data.decode('utf-8'))
self.roles = d.get('roles', [])
self.name = d.get('user')
def _to_net(self, prevobj=None):
if prevobj is None:
retval = [{"user": self.name, "password": self._password,
"roles": list(self.roles)}]
else:
retval = []
if self._password:
retval.append({"user": self.name, "password": self._password})
to_grant = list(self.roles - prevobj.roles)
to_revoke = list(prevobj.roles - self.roles)
if to_grant:
retval.append({"user": self.name, "grant": to_grant})
if to_revoke:
retval.append({"user": self.name, "revoke": to_revoke})
# Let's blank the password now
# Even if the user can't be written we don't want it to leak anymore.
self._password = None
return retval
@property
def roles(self):
return self._roles
@roles.setter
def roles(self, val):
self._roles = set(val)
@property
def password(self):
"""Empty property for password."""
return None
@password.setter
def password(self, new_password):
"""Change user's password."""
self._password = new_password
def __str__(self):
return json.dumps(self._to_net()[0])
class EtcdRole(EtcdAuthBase):
entity = 'role'
def __init__(self, client, name):
super(EtcdRole, self).__init__(client, name)
self._read_paths = set()
self._write_paths = set()
def _from_net(self, data):
d = json.loads(data.decode('utf-8'))
self.name = d.get('role')
try:
kv = d["permissions"]["kv"]
except:
self._read_paths = set()
self._write_paths = set()
return
self._read_paths = set(kv.get('read', []))
self._write_paths = set(kv.get('write', []))
def _to_net(self, prevobj=None):
retval = []
if prevobj is None:
retval.append({
"role": self.name,
"permissions":
{
"kv":
{
"read": list(self._read_paths),
"write": list(self._write_paths)
}
}
})
else:
to_grant = {
'read': list(self._read_paths - prevobj._read_paths),
'write': list(self._write_paths - prevobj._write_paths)
}
to_revoke = {
'read': list(prevobj._read_paths - self._read_paths),
'write': list(prevobj._write_paths - self._write_paths)
}
if [path for sublist in to_revoke.values() for path in sublist]:
retval.append({'role': self.name, 'revoke': {'kv': to_revoke}})
if [path for sublist in to_grant.values() for path in sublist]:
retval.append({'role': self.name, 'grant': {'kv': to_grant}})
return retval
def grant(self, path, permission):
if permission.upper().find('R') >= 0:
self._read_paths.add(path)
if permission.upper().find('W') >= 0:
self._write_paths.add(path)
def revoke(self, path, permission):
if permission.upper().find('R') >= 0 and \
path in self._read_paths:
self._read_paths.remove(path)
if permission.upper().find('W') >= 0 and \
path in self._write_paths:
self._write_paths.remove(path)
@property
def acls(self):
perms = {}
try:
for path in self._read_paths:
perms[path] = 'R'
for path in self._write_paths:
if path in perms:
perms[path] += 'W'
else:
perms[path] = 'W'
except:
pass
return perms
@acls.setter
def acls(self, acls):
self._read_paths = set()
self._write_paths = set()
for path, permission in acls.items():
self.grant(path, permission)
def __str__(self):
return json.dumps({"role": self.name, 'acls': self.acls})
class Auth(object):
def __init__(self, client):
self.client = client
self.uri = "{}/auth/enable".format(self.client.version_prefix)
@property
def active(self):
resp = self.client.api_execute(self.uri, self.client._MGET)
return json.loads(resp.data.decode('utf-8'))['enabled']
@active.setter
def active(self, value):
if value != self.active:
method = value and self.client._MPUT or self.client._MDELETE
self.client.api_execute(self.uri, method)
|
