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
|
#!/usr/bin/python
#
# Copyright (C) 2014 Simo Sorce <simo@redhat.com>
#
# see file 'COPYING' for use and warranty information
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
from lxml import html
import requests
import string
import urlparse
class WrongPage(Exception):
pass
class PageTree(object):
def __init__(self, result):
self.result = result
self.text = result.text
self._tree = None
@property
def tree(self):
if self._tree is None:
self._tree = html.fromstring(self.text)
return self._tree
def first_value(self, rule):
result = self.tree.xpath(rule)
if type(result) is list:
if len(result) > 0:
result = result[0]
else:
result = None
return result
def all_values(self, rule):
result = self.tree.xpath(rule)
if type(result) is list:
return result
return [result]
def make_referer(self):
return self.result.url
def expected_value(self, rule, expected):
value = self.first_value(rule)
if value != expected:
raise ValueError("Expected [%s], got [%s]" % (expected, value))
class HttpSessions(object):
def __init__(self):
self.servers = dict()
def add_server(self, name, baseuri, user=None, pwd=None):
new = {'baseuri': baseuri,
'session': requests.Session()}
if user:
new['user'] = user
if pwd:
new['pwd'] = pwd
self.servers[name] = new
def get_session(self, url):
for srv in self.servers:
d = self.servers[srv]
if url.startswith(d['baseuri']):
return d['session']
raise ValueError("Unknown URL: %s" % url)
def get(self, url, **kwargs):
session = self.get_session(url)
return session.get(url, allow_redirects=False, **kwargs)
def post(self, url, **kwargs):
session = self.get_session(url)
return session.post(url, allow_redirects=False, **kwargs)
def access(self, action, url, **kwargs):
action = string.lower(action)
if action == 'get':
return self.get(url, **kwargs)
elif action == 'post':
return self.post(url, **kwargs)
else:
raise ValueError("Unknown action type: [%s]" % action)
def new_url(self, referer, action):
if action.startswith('/'):
u = urlparse.urlparse(referer)
return '%s://%s%s' % (u.scheme, u.netloc, action)
return action
def get_form_data(self, page, form_id, input_fields):
values = []
action = page.first_value('//form[@id="%s"]/@action' % form_id)
values.append(action)
method = page.first_value('//form[@id="%s"]/@method' % form_id)
values.append(method)
for field in input_fields:
value = page.all_values('//form[@id="%s"]/input/@%s' % (form_id,
field))
values.append(value)
return values
def handle_login_form(self, idp, page):
if type(page) != PageTree:
raise TypeError("Expected PageTree object")
srv = self.servers[idp]
try:
results = self.get_form_data(page, "login_form", [])
action_url = results[0]
method = results[1]
if action_url is None:
raise Exception
except Exception: # pylint: disable=broad-except
raise WrongPage("Not a Login Form Page")
referer = page.make_referer()
headers = {'referer': referer}
payload = {'login_name': srv['user'],
'login_password': srv['pwd']}
return [method, self.new_url(referer, action_url),
{'headers': headers, 'data': payload}]
def handle_return_form(self, page):
if type(page) != PageTree:
raise TypeError("Expected PageTree object")
try:
results = self.get_form_data(page, "saml-response",
["name", "value"])
action_url = results[0]
if action_url is None:
raise Exception
method = results[1]
names = results[2]
values = results[3]
except Exception: # pylint: disable=broad-except
raise WrongPage("Not a Return Form Page")
referer = page.make_referer()
headers = {'referer': referer}
payload = {}
for i in range(0, len(names)):
payload[names[i]] = values[i]
return [method, self.new_url(referer, action_url),
{'headers': headers, 'data': payload}]
def fetch_page(self, idp, target_url):
url = target_url
action = 'get'
args = {}
while True:
r = self.access(action, url, **args) # pylint: disable=star-args
if r.status_code == 303:
url = r.headers['location']
action = 'get'
args = {}
elif r.status_code == 200:
page = PageTree(r)
try:
(action, url, args) = self.handle_login_form(idp, page)
continue
except WrongPage:
pass
try:
(action, url, args) = self.handle_return_form(page)
continue
except WrongPage:
pass
# Either we got what we wanted, or we have to stop anyway
return page
else:
raise ValueError("Unhandled status (%d) on url %s" % (
r.status_code, url))
def auth_to_idp(self, idp):
srv = self.servers[idp]
target_url = '%s/%s/' % (srv['baseuri'], idp)
r = self.access('get', target_url)
if r.status_code != 200:
raise ValueError("Access to idp failed: %s" % repr(r))
page = PageTree(r)
page.expected_value('//div[@id="content"]/p/a/text()', 'Log In')
href = page.first_value('//div[@id="content"]/p/a/@href')
url = self.new_url(target_url, href)
page = self.fetch_page(idp, url)
page.expected_value('//div[@id="welcome"]/p/text()',
'Welcome %s!' % srv['user'])
def add_sp_metadata(self, idp, sp):
idpsrv = self.servers[idp]
idpuri = idpsrv['baseuri']
spuri = self.servers[sp]['baseuri']
url = '%s/%s/admin/providers/saml2/admin/new' % (idpuri, idp)
headers = {'referer': url}
payload = {'name': sp}
m = requests.get('%s/saml2/metadata' % spuri)
metafile = {'metafile': m.content}
r = idpsrv['session'].post(url, headers=headers,
data=payload, files=metafile)
if r.status_code != 200:
raise ValueError('Failed to post SP data [%s]' % repr(r))
page = PageTree(r)
page.expected_value('//div[@class="alert alert-success"]/p/text()',
'SP Successfully added')
|
