/usr/share/pyshared/medusa/auth_handler.py is in python-medusa 1:0.5.4-7.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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 | # -*- Mode: Python -*-
#
# Author: Sam Rushing <rushing@nightmare.com>
# Copyright 1996-2000 by Sam Rushing
# All Rights Reserved.
#
RCS_ID = '$Id: auth_handler.py,v 1.6 2002/11/25 19:40:23 akuchling Exp $'
# support for 'basic' authenticaion.
import base64
import md5
import re
import string
import time
import counter
import default_handler
get_header = default_handler.get_header
import producers
# This is a 'handler' that wraps an authorization method
# around access to the resources normally served up by
# another handler.
# does anyone support digest authentication? (rfc2069)
class auth_handler:
def __init__ (self, dict, handler, realm='default'):
self.authorizer = dictionary_authorizer (dict)
self.handler = handler
self.realm = realm
self.pass_count = counter.counter()
self.fail_count = counter.counter()
def match (self, request):
# by default, use the given handler's matcher
return self.handler.match (request)
def handle_request (self, request):
# authorize a request before handling it...
scheme = get_header (AUTHORIZATION, request.header)
if scheme:
scheme = string.lower (scheme)
if scheme == 'basic':
cookie = get_header (AUTHORIZATION, request.header, 2)
try:
decoded = base64.decodestring (cookie)
except:
print 'malformed authorization info <%s>' % cookie
request.error (400)
return
auth_info = string.split (decoded, ':')
if self.authorizer.authorize (auth_info):
self.pass_count.increment()
request.auth_info = auth_info
self.handler.handle_request (request)
else:
self.handle_unauthorized (request)
#elif scheme == 'digest':
# print 'digest: ',AUTHORIZATION.group(2)
else:
print 'unknown/unsupported auth method: %s' % scheme
self.handle_unauthorized(request)
else:
# list both? prefer one or the other?
# you could also use a 'nonce' here. [see below]
#auth = 'Basic realm="%s" Digest realm="%s"' % (self.realm, self.realm)
#nonce = self.make_nonce (request)
#auth = 'Digest realm="%s" nonce="%s"' % (self.realm, nonce)
#request['WWW-Authenticate'] = auth
#print 'sending header: %s' % request['WWW-Authenticate']
self.handle_unauthorized (request)
def handle_unauthorized (self, request):
# We are now going to receive data that we want to ignore.
# to ignore the file data we're not interested in.
self.fail_count.increment()
request.channel.set_terminator (None)
request['Connection'] = 'close'
request['WWW-Authenticate'] = 'Basic realm="%s"' % self.realm
request.error (401)
def make_nonce (self, request):
"A digest-authentication <nonce>, constructed as suggested in RFC 2069"
ip = request.channel.server.ip
now = str(long(time.time()))
if now[-1:] == 'L':
now = now[:-1]
private_key = str (id (self))
nonce = string.join ([ip, now, private_key], ':')
return self.apply_hash (nonce)
def apply_hash (self, s):
"Apply MD5 to a string <s>, then wrap it in base64 encoding."
m = md5.new()
m.update (s)
d = m.digest()
# base64.encodestring tacks on an extra linefeed.
return base64.encodestring (d)[:-1]
def status (self):
# Thanks to mwm@contessa.phone.net (Mike Meyer)
r = [
producers.simple_producer (
'<li>Authorization Extension : '
'<b>Unauthorized requests:</b> %s<ul>' % self.fail_count
)
]
if hasattr (self.handler, 'status'):
r.append (self.handler.status())
r.append (
producers.simple_producer ('</ul>')
)
return producers.composite_producer(r)
class dictionary_authorizer:
def __init__ (self, dict):
self.dict = dict
def authorize (self, auth_info):
[username, password] = auth_info
if (self.dict.has_key (username)) and (self.dict[username] == password):
return 1
else:
return 0
AUTHORIZATION = re.compile (
# scheme challenge
'Authorization: ([^ ]+) (.*)',
re.IGNORECASE
)
|