|
1
|
|
|
import logging |
|
2
|
|
|
from hashlib import sha256 |
|
3
|
|
|
|
|
4
|
|
|
from django.conf import settings |
|
5
|
|
|
from django.http import HttpResponse |
|
6
|
|
|
from django.utils import timezone |
|
7
|
|
|
|
|
8
|
|
|
import pytz |
|
9
|
|
|
from omaha.dynamic_preferences_registry import global_preferences_manager as gpm |
|
10
|
|
|
from ecdsa import SigningKey |
|
11
|
|
|
from ecdsa.util import sigencode_der |
|
12
|
|
|
|
|
13
|
|
|
logger = logging.getLogger(__name__) |
|
14
|
|
|
|
|
15
|
|
|
|
|
16
|
|
|
class CUP2Exception(Exception): |
|
17
|
|
|
pass |
|
18
|
|
|
|
|
19
|
|
|
|
|
20
|
|
|
class TimezoneMiddleware(object): |
|
21
|
|
|
def process_request(self, request): |
|
22
|
|
|
tzname = gpm['Timezone__timezone'] |
|
23
|
|
|
if tzname: |
|
24
|
|
|
timezone.activate(pytz.timezone(tzname)) |
|
25
|
|
|
else: |
|
26
|
|
|
timezone.deactivate() |
|
27
|
|
|
|
|
28
|
|
|
|
|
29
|
|
|
class CUP2Middleware(object): |
|
30
|
|
|
"""Support CUP2 protocol of Omaha Client. |
|
31
|
|
|
""" |
|
32
|
|
|
|
|
33
|
|
|
def __init__(self): |
|
34
|
|
|
self.sk = {} |
|
35
|
|
|
# Loading signature keys to memory |
|
36
|
|
|
for keyid, private_key in settings.CUP_PEM_KEYS.iteritems(): |
|
37
|
|
|
self.sk[keyid] = SigningKey.from_pem(open(private_key).read()) |
|
38
|
|
|
|
|
39
|
|
|
def process_request(self, request): |
|
40
|
|
|
if getattr(settings, 'CUP_REQUEST_VALIDATION', False) and self.is_cup2_request(request): |
|
41
|
|
|
try: |
|
42
|
|
|
self.validate_cup2_request(request) |
|
43
|
|
|
except Exception as e: |
|
44
|
|
|
logger.error('%s: %s\nrequest:\n%s\n\n%s\n' % (e.__class__.__name__, e.message, |
|
45
|
|
|
request.META, request.body)) |
|
46
|
|
|
msg = b'<?xml version="1.0" encoding="utf-8"?><data><message>Bad Request</message></data>' |
|
47
|
|
|
return HttpResponse(msg, status=400, content_type="text/html; charset=utf-8") |
|
48
|
|
|
|
|
49
|
|
|
def process_response(self, request, response): |
|
50
|
|
|
if getattr(settings, 'CUP_REQUEST_VALIDATION', False) and self.is_cup2_request(request) and response.status_code // 100 == 2: |
|
51
|
|
|
self.sign_cup2_response(request, response) |
|
52
|
|
|
|
|
53
|
|
|
return response |
|
54
|
|
|
|
|
55
|
|
|
@staticmethod |
|
56
|
|
|
def is_cup2_request(request): |
|
57
|
|
|
"""Detects CUP2 request by passed cup2key parameter. |
|
58
|
|
|
""" |
|
59
|
|
|
return request.GET.get('cup2key') is not None |
|
60
|
|
|
|
|
61
|
|
|
def validate_cup2_request(self, request): |
|
62
|
|
|
cup2key = request.GET.get('cup2key') |
|
63
|
|
|
cup2hreq = request.GET.get('cup2hreq') |
|
64
|
|
|
|
|
65
|
|
|
keyid, k = cup2key.split(':') |
|
66
|
|
|
if keyid not in self.sk.keys(): |
|
67
|
|
|
raise CUP2Exception('There is no key with id %s' % keyid) |
|
68
|
|
|
|
|
69
|
|
|
request_hash = sha256(request.body).hexdigest() |
|
70
|
|
|
if cup2hreq and request_hash != cup2hreq: |
|
71
|
|
|
raise CUP2Exception('Bad request hash\n"%s" != "%s"' % (request_hash, cup2hreq)) |
|
72
|
|
|
|
|
73
|
|
|
def sign_cup2_response(self, request, response): |
|
74
|
|
|
cup2key = request.GET.get('cup2key') |
|
75
|
|
|
|
|
76
|
|
|
request_hash = sha256(request.body).digest() |
|
77
|
|
|
response_hash = sha256(response.content).digest() |
|
78
|
|
|
|
|
79
|
|
|
keyid, k = cup2key.split(':') |
|
80
|
|
|
# hash( hash(request) | hash(response) | cup2key ) |
|
81
|
|
|
message = sha256(request_hash + response_hash + cup2key.encode()).digest() |
|
82
|
|
|
signature = self.sk[keyid].sign(message, hashfunc=sha256, sigencode=sigencode_der, k=int(k)) |
|
83
|
|
|
|
|
84
|
|
|
response['ETag'] = '%s:%s' % (signature.encode('hex'), request_hash.encode('hex')) |
|
85
|
|
|
|
|
86
|
|
|
|
|
87
|
|
|
class LoggingMiddleware(object): |
|
88
|
|
|
def process_request(self, request): |
|
89
|
|
|
if 'live' in request.path: |
|
90
|
|
|
logging.info('process_request') |
|
91
|
|
|
|
|
92
|
|
|
def process_view(self, request, view_func, view_args, view_kwargs): |
|
93
|
|
|
if 'live' in request.path: |
|
94
|
|
|
logging.info('process_view') |
|
95
|
|
|
|
|
96
|
|
|
def process_response(self, request, response): |
|
97
|
|
|
if 'live' in request.path: |
|
98
|
|
|
logging.info('process_response') |
|
99
|
|
|
return response |
|
100
|
|
|
|
Crystalnix /
omaha-server
