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
|
#! /usr/bin/env python3
import yaml
class Authz:
def __init__(self, org, perms):
self._org = org
self._perms = perms
def dump(self):
return "{}: {}".format(self._org, self._perms)
def read_p(self):
return 'r' in self._perms
def write_p(self):
return 'w' in self._perms
class User:
def __init__(self, username, pw, authz):
self._username = username
self._password = pw
self._authz = {}
for org, perms in authz.items():
self._authz[org] = Authz(org, perms)
def dump(self):
return ["{}/{}: {}".format(self._username, self._password, auth.dump())
for auth in self._authz.values()]
def authn_p(self, pw):
return pw == self._password
def orgnames(self):
return [x for x in self._authz.keys()]
def read_perms(self):
acc = []
for k, v in self._authz.items():
if v.read_p():
acc.append(k)
return acc
def write_perms(self):
acc = []
for k, v in self._authz.items():
if v.write_p():
acc.append(k)
return acc
class UserDB:
def __init__(self, yamlfile):
self._users = {}
for u, d in yaml.safe_load(open(yamlfile)).items():
self._users[u] = User(u, d['pw'], d['authz'])
def dump(self):
return [u.dump() for u in self._users.values()]
def user_authn_p(self, username, password):
user = self._users.get(username)
if not user:
return False
return user.authn_p(password)
def orgs_for_user(self, username):
return self._users.get(username).orgnames()
def read_perms(self, username, password):
user = self._users.get(username)
if not user:
return None
if not user.authn_p(password):
return None
return user.read_perms()
def write_perms(self, username, password):
user = self._users.get(username)
if not user:
return None
if not user.authn_p(password):
return None
return user.write_perms()
def self_test():
db = UserDB('userdb.yaml')
print(db.dump())
orgs = db.orgs_for_user('user3')
assert('sunet.se' in orgs)
assert('su.se' in orgs)
assert(len(orgs) == 2)
assert(db.user_authn_p('user3', 'pw3') == True)
assert(db.user_authn_p('user3', 'wrongpw') == False)
rp = db.read_perms('user3', 'pw3')
assert(len(rp) == 2)
assert('sunet.se' in rp)
assert('su.se' in rp)
wp = db.write_perms('user3', 'pw3')
assert(len(wp) == 1)
assert('sunet.se' in wp)
if __name__ == '__main__':
self_test()
|
