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
|
# $Id$
#
# Copyright (C) 2015--2016 Parsons Government Services ("PARSONS")
# Portions copyright (C) 2014 Dragon Research Labs ("DRL")
#
# Permission to use, copy, modify, and distribute this software for any
# purpose with or without fee is hereby granted, provided that the above
# copyright notices and this permission notice appear in all copies.
#
# THE SOFTWARE IS PROVIDED "AS IS" AND PARSONS AND DRL DISCLAIM ALL
# WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
# WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL
# PARSONS OR DRL BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR
# CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS
# OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
# NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
# WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
"""
HTTP using Python standard libraries, for RPKI programs that don't
need the full-blown rpki.http asynchronous code.
"""
import logging
import httplib
import urlparse
import BaseHTTPServer
logger = logging.getLogger(__name__)
default_content_type = "application/x-rpki"
class HTTPRequestHandler(BaseHTTPServer.BaseHTTPRequestHandler):
"""
HTTP request handler simple RPKI servers.
"""
rpki_handlers = ()
def do_POST(self):
try:
content_type = self.headers.get("Content-Type")
content_length = self.headers.get("Content-Length")
for handler_path, handler, handler_content_type in self.rpki_handlers:
if self.path.startswith(handler_path) and content_type in handler_content_type:
return handler(self,
self.rfile.read()
if content_length is None else
self.rfile.read(int(content_length)))
self.send_error(404, "No handler for path %s" % self.path)
except Exception, e:
logger.exception("Unhandled exception")
self.send_error(501, "Unhandled exception %s" % e)
def send_cms_response(self, der):
self.send_response(200)
self.send_header("Content-Type", default_content_type)
self.send_header("Content-Length", str(len(der)))
self.end_headers()
self.wfile.write(der)
def log_message(self, *args):
logger.info(*args, extra = dict(context = "%s:%s" % self.client_address))
def send_error(self, code, message = None):
# BaseHTTPRequestHandler.send_error() generates HTML error messages,
# which we don't want, so we override the method to suppress this.
self.send_response(code, message)
self.send_header("Content-Type", default_content_type)
self.send_header("Connection", "close")
self.end_headers()
def server(handlers, port, host = ""):
"""
Run an HTTP server and wait (forever) for connections.
"""
if isinstance(handlers, (tuple, list)):
handlers = tuple(h[:3] if len(h) > 2 else (h[0], h[1], default_content_type)
for h in handlers)
else:
handlers = (("/", handlers, default_content_type),)
class RequestHandler(HTTPRequestHandler):
rpki_handlers = handlers
BaseHTTPServer.HTTPServer((host, port), RequestHandler).serve_forever()
class BadURL(Exception):
"Bad contact URL"
class RequestFailed(Exception):
"HTTP returned failure"
class BadContentType(Exception):
"Wrong HTTP Content-Type"
def client(proto_cms_msg, client_key, client_cert, server_ta, server_cert, url, q_msg,
debug = None, replay_track = None, client_crl = None, content_type = default_content_type):
"""
Issue single a query and return the response, handling all the CMS and XML goo.
"""
u = urlparse.urlparse(url)
if u.scheme not in ("", "http") or u.username or u.password or u.params or u.query or u.fragment:
raise BadURL("Unusable URL %s", url)
q_cms = proto_cms_msg()
q_der = q_cms.wrap(q_msg, client_key, client_cert, client_crl)
if debug is not None:
debug.write("<!-- Query -->\n" + q_cms.pretty_print_content() + "\n")
http = httplib.HTTPConnection(u.hostname, u.port or httplib.HTTP_PORT)
http.request("POST", u.path, q_der, {"Content-Type" : content_type})
r = http.getresponse()
if r.status != 200:
raise RequestFailed("HTTP request failed with status %r reason %r" % (r.status, r.reason))
if r.getheader("Content-Type") != content_type:
raise BadContentType("HTTP Content-Type %r, expected %r" % (r.getheader("Content-Type"), content_type))
r_der = r.read()
r_cms = proto_cms_msg(DER = r_der)
r_msg = r_cms.unwrap((server_ta, server_cert))
if replay_track is not None:
replay_track.cms_timestamp = r_cms.check_replay(replay_track.cms_timestamp, url)
if debug is not None:
debug.write("<!-- Reply -->\n" + r_cms.pretty_print_content() + "\n")
return r_msg
|
