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
|
# -*- test-case-name: twext.who.test.test_checker -*-
##
# Copyright (c) 2013-2016 Apple Inc. 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.
##
"""
L{twisted.cred}-style credential checker.
"""
from zope.interface import implementer, classImplements, Attribute
from twisted.internet.defer import inlineCallbacks, returnValue
from twisted.cred.error import UnauthorizedLogin
from twisted.cred.checkers import ICredentialsChecker
from twisted.cred.credentials import (
ICredentials, IUsernamePassword, IUsernameHashedPassword,
DigestedCredentials,
)
from .idirectory import (
IDirectoryService, RecordType,
IPlaintextPasswordVerifier, IHTTPDigestVerifier,
)
@implementer(ICredentialsChecker)
class BaseCredentialChecker(object):
# credentialInterfaces = (IUsernamePassword, IUsernameHashedPassword)
def __init__(self, service):
"""
@param service: The directory service to use to obtain directory
records and validate credentials against.
@type service: L{IDirectoryService}
"""
if not IDirectoryService.providedBy(service):
raise TypeError("Not an IDirectoryService: {0!r}".format(service))
self.service = service
class UsernamePasswordCredentialChecker(BaseCredentialChecker):
credentialInterfaces = (IUsernamePassword, IUsernameHashedPassword)
@inlineCallbacks
def requestAvatarId(self, credentials):
if not IUsernamePassword.providedBy(credentials):
raise TypeError(
"Not an IUsernamePassword: {0!r}".format(credentials)
)
record = yield self.service.recordWithShortName(
RecordType.user, credentials.username.decode("utf-8")
)
if record is None:
raise UnauthorizedLogin("No such user")
if not IPlaintextPasswordVerifier.providedBy(record):
raise UnauthorizedLogin(
"Not an IPlaintextPasswordVerifier: {0!r}".format(record)
)
auth = yield record.verifyPlaintextPassword(credentials.password)
if auth:
returnValue(record)
raise UnauthorizedLogin("Incorrect password")
class IHTTPDigest(ICredentials):
"""
HTTP digest credentials.
"""
username = Attribute("User (short) name")
method = Attribute("...")
fields = Attribute("...") # Attributes would be better.
classImplements(DigestedCredentials, (IHTTPDigest,))
class HTTPDigestCredentialChecker(BaseCredentialChecker):
credentialInterfaces = (IHTTPDigest,)
@inlineCallbacks
def requestAvatarId(self, credentials):
if not IHTTPDigest.providedBy(credentials):
raise TypeError(
"Not an IHTTPDigest: {0!r}".format(credentials)
)
record = yield self.service.recordWithShortName(
RecordType.user, credentials.username.decode("utf-8")
)
if record is None:
raise UnauthorizedLogin("No such user")
if not IHTTPDigestVerifier.providedBy(record):
raise UnauthorizedLogin(
"Not an IHTTPDigestVerifier: {0!r}".format(record)
)
result = yield record.verifyHTTPDigest(
credentials.username,
credentials.fields.get("realm"),
credentials.fields.get("uri"),
credentials.fields.get("nonce"),
credentials.fields.get("cnonce"),
credentials.fields.get("algorithm", "md5"),
credentials.fields.get("nc"),
credentials.fields.get("qop"),
credentials.fields.get("response"),
credentials.method,
)
if result:
returnValue(record)
raise UnauthorizedLogin("Incorrect password")
|
