You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
129 lines
4.1 KiB
129 lines
4.1 KiB
# Xlib.xauth -- ~/.Xauthority access
|
|
#
|
|
# Copyright (C) 2000 Peter Liljenberg <petli@ctrl-c.liu.se>
|
|
# Copyright (C) 2013 LiuLang <gsushzhsosgsu@gmail.com>
|
|
#
|
|
# 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 2 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, write to the Free Software
|
|
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
|
|
import os
|
|
import struct
|
|
|
|
from Xlib import X, error
|
|
|
|
FamilyInternet = X.FamilyInternet
|
|
FamilyDECnet = X.FamilyDECnet
|
|
FamilyChaos = X.FamilyChaos
|
|
FamilyLocal = 256
|
|
|
|
class Xauthority:
|
|
def __init__(self, filename = None):
|
|
if filename is None:
|
|
filename = os.environ.get('XAUTHORITY')
|
|
|
|
if filename is None:
|
|
try:
|
|
filename = os.path.join(os.environ['HOME'], '.Xauthority')
|
|
except KeyError:
|
|
raise error.XauthError(
|
|
'$HOME not set, cannot find ~/.Xauthority')
|
|
|
|
try:
|
|
raw = open(filename, 'rb').read()
|
|
except OSError as err:
|
|
raise error.XauthError('~/.Xauthority: %s' % err)
|
|
|
|
self.entries = []
|
|
|
|
# entry format (all shorts in big-endian)
|
|
# short family;
|
|
# short addrlen;
|
|
# char addr[addrlen];
|
|
# short numlen;
|
|
# char num[numlen];
|
|
# short namelen;
|
|
# char name[namelen];
|
|
# short datalen;
|
|
# char data[datalen];
|
|
|
|
n = 0
|
|
try:
|
|
while n < len(raw):
|
|
family, = struct.unpack('>H', raw[n:n+2])
|
|
n = n + 2
|
|
|
|
length, = struct.unpack('>H', raw[n:n+2])
|
|
n = n + length + 2
|
|
addr = raw[n - length : n]
|
|
|
|
length, = struct.unpack('>H', raw[n:n+2])
|
|
n = n + length + 2
|
|
num = raw[n - length : n]
|
|
|
|
length, = struct.unpack('>H', raw[n:n+2])
|
|
n = n + length + 2
|
|
name = raw[n - length : n]
|
|
|
|
length, = struct.unpack('>H', raw[n:n+2])
|
|
n = n + length + 2
|
|
data = raw[n - length : n]
|
|
|
|
if len(data) != length:
|
|
break
|
|
|
|
self.entries.append((family, addr, num, name, data, ))
|
|
except struct.error as e:
|
|
print("Xlib.xauth: warning, failed to parse part of xauthority file (%s), aborting all further parsing" % filename)
|
|
|
|
if len(self.entries) == 0:
|
|
print("Xlib.xauth: warning, no xauthority details available")
|
|
# raise an error? this should get partially caught by the XNoAuthError in get_best_auth..
|
|
|
|
def __len__(self):
|
|
return len(self.entries)
|
|
|
|
def __getitem__(self, i):
|
|
return self.entries[i]
|
|
|
|
def get_best_auth(self, family, address, dispno,
|
|
types = ( b"MIT-MAGIC-COOKIE-1", )):
|
|
|
|
"""Find an authentication entry matching FAMILY, ADDRESS and
|
|
DISPNO.
|
|
|
|
The name of the auth scheme must match one of the names in
|
|
TYPES. If several entries match, the first scheme in TYPES
|
|
will be choosen.
|
|
|
|
If an entry is found, the tuple (name, data) is returned,
|
|
otherwise XNoAuthError is raised.
|
|
"""
|
|
|
|
num = str(dispno).encode()
|
|
address = address.encode()
|
|
|
|
matches = {}
|
|
|
|
for efam, eaddr, enum, ename, edata in self.entries:
|
|
if efam == family and eaddr == address and num == enum:
|
|
matches[ename] = edata
|
|
|
|
for t in types:
|
|
try:
|
|
return (t, matches[t])
|
|
except KeyError:
|
|
pass
|
|
|
|
raise error.XNoAuthError((family, address, dispno))
|