handle Internet cookie addresses correctly. Fixes #121

This commit is contained in:
Andrey Sidorov 2016-01-15 16:01:54 +11:00
parent 0d7346fbac
commit 70519cbb38
3 changed files with 85 additions and 92 deletions

View file

@ -11,81 +11,74 @@ function parseXauth( buf )
var auth = [];
var cookieProperties = ['address', 'display', 'authName', 'authData'];
function handleCookieProperty(property) {
var length = buf.unpack('n', offset)[0];
offset += 2;
cookie[property] = buf.unpackString(length, offset);
offset += length;
}
while (offset < buf.length)
{
var cookie = {};
var cookie = {};
var typeToName = {
256: 'Local',
65535: 'Wild',
254: 'Netname',
253: 'Krb5Principal',
253: 'Krb5Principal',
252: 'LocalHost',
0: 'Internet',
1: 'DECnet',
0: 'Internet',
1: 'DECnet',
2: 'Chaos',
5: 'ServerInterpreted',
5: 'ServerInterpreted',
6: 'InternetV6'
};
cookie.type = buf.unpack('n')[0];
cookie.type = buf.readUInt16LE(offset);
console.log('Cookie type: ');
if (!typeToName[cookie.type]) {
console.warn('Unknown address type');
}
offset += 2;
//JSHint becomes angry when handleCookieProperty is declared inside loop
cookieProperties.forEach(handleCookieProperty);
cookieProperties.forEach(function(property) {
var length = buf.unpack('n', offset)[0];
offset += 2;
if (cookie.type === 0 && property == 'address') { // Internet
// 4 bytes of ip addess, convert to w.x.y.z string
cookie.address = [ buf[offset], buf[offset+1], buf[offset+2], buf[offset+3]]
.map(function(octet) { return octet.toString(10) }).join('.');
} else {
cookie[property] = buf.unpackString(length, offset);
}
offset += length;
});
auth.push(cookie);
}
return auth;
}
var os = require('os');
var path = require('path');
function readXauthority(cb) {
var filename = process.env.XAUTHORITY || path.join(os.homedir(), '.Xauthority');
fs.readFile(filename, function(err, data) {
if (!err)
return cb(null, data);
if(err.code == 'ENOENT') {
// Xming/windows uses %HOME%/Xauthority ( .Xauthority with no dot ) - try with this name
filename = process.env.XAUTHORITY || path.join(os.homedir(), 'Xauthority');
return fs.readFile(filename, cb);
} else {
cb(err);
}
});
}
module.exports = function( display, host, cb )
{
var XAuthorityFile = process.env.XAUTHORITY;
if (!XAuthorityFile)
readXauthority(function(err, data) {
if(err) return cb(err);
var auth = parseXauth(data);
for (var cookieNum in auth)
{
if ( process.platform.match(/win/) ) {
// http://www.straightrunning.com/XmingNotes/trouble.php
//
// The Xming magic cookie program, xauth (user-based), uses an
// Xauthority file (not the traditional .Xauthority file) in
// the %HOME% directory. To use xauth from Command Processor
// e.g. on Windows machine 192.168.0.2 with user colin...
XAuthorityFile = process.env.USERPROFILE + '\\Xauthority';
} else {
XAuthorityFile = process.env.HOME + '/.Xauthority';
}
var cookie = auth[cookieNum];
if (cookie.display === display && cookie.address === host)
return cb( null, cookie );
}
fs.readFile(XAuthorityFile, function (err, data) {
if (err)
{
if (err.code == 'ENOENT')
{
cb('','');
return;
}
throw err;
}
var auth = parseXauth(data);
for (var cookieNum in auth)
{
var cookie = auth[cookieNum];
if (cookie.display == display && cookie.address == host)
{
cb( cookie.authName, cookie.authData );
return;
}
}
// throw 'No auth cookie matching display=' + display + ' and host=' + host;
cb( '', '' );
});
cb(new Error('No auth cookie matching display=' + display + ' and host=' + host));
});
};

View file

@ -12,15 +12,15 @@ function readVisuals(bl, visuals, n_visuals, cb)
var visual = {};
bl.unpackTo( visual,
[
'L vid',
'C class',
'C bits_per_rgb',
'L vid',
'C class',
'C bits_per_rgb',
'S map_ent',
'L red_mask',
'L green_mask',
'L blue_mask',
'xxxx'
],
],
function() {
var vid = visual.vid;
// delete visual.vid;
@ -28,7 +28,7 @@ function readVisuals(bl, visuals, n_visuals, cb)
if (Object.keys(visuals).length == n_visuals)
cb()
else
readVisuals(bl, visuals, n_visuals, cb);
readVisuals(bl, visuals, n_visuals, cb);
});
}
@ -51,7 +51,7 @@ function readDepths(bl, display, depths, n_depths, cb)
cb();
else
readDepths(bl, display, depths, n_depths, cb);
});
});
});
}
@ -62,23 +62,23 @@ function readScreens(bl, display, cbDisplayReady)
var scr = {};
bl.unpackTo( scr,
[
'L root',
'L root',
'L default_colormap',
'L white_pixel',
'L white_pixel',
'L black_pixel',
'L input_masks',
'S pixel_width',
'S pixel_height',
'S mm_width',
'S mm_height',
'S min_installed_maps',
'L input_masks',
'S pixel_width',
'S pixel_height',
'S mm_width',
'S mm_height',
'S min_installed_maps',
'S max_installed_maps',
'L root_visual',
'L root_visual',
'C root_depth',
'C backing_stores',
'C root_depth',
'C num_depths'
],
],
function () {
var depths = {};
readDepths(bl, display, depths, scr.num_depths, function() {
@ -86,7 +86,7 @@ function readScreens(bl, display, cbDisplayReady)
scr.depths = depths;
delete scr.num_depths;
display.screen.push(scr);
if (display.screen.length == display.screen_num)
{
delete display.screen_num;
@ -96,7 +96,7 @@ function readScreens(bl, display, cbDisplayReady)
readScreens(bl, display, cbDisplayReady);
}
});
});
});
}
}
@ -104,7 +104,7 @@ function readServerHello(bl, cb)
{
bl.unpack('C', function(res) {
if (res[0] == 0)
{
// conection time error
@ -124,10 +124,10 @@ bl.unpack('C', function(res) {
'S major',
'S minor',
'S xlen',
'L release',
'L resource_base',
'L resource_mask',
'L motion_buffer_size',
'L release',
'L resource_base',
'L resource_mask',
'L motion_buffer_size',
'S vlen',
'S max_request_length',
'C screen_num',
@ -139,8 +139,8 @@ bl.unpack('C', function(res) {
'C min_keycode',
'C max_keycode',
'xxxx'
],
],
function()
{
var pvlen = xutil.padded_length(display.vlen);
@ -148,12 +148,12 @@ bl.unpack('C', function(res) {
// setup data to generate resource id
// TODO: cleaunup code here
var mask = display.resource_mask;
display.rsrc_shift = 0;
display.rsrc_shift = 0;
while (!( (mask >> display.rsrc_shift) & 1) )
display.rsrc_shift++;
display.rsrc_id = 0;
bl.get(pvlen, function(vendor)
bl.get(pvlen, function(vendor)
{
display.vendor = vendor.toString().substr(0, display.vlen); // utf8 by default?
@ -172,7 +172,7 @@ bl.unpack('C', function(res) {
readScreens(bl, display, cb);
}
});
}
}
});
}
);
@ -191,23 +191,24 @@ function getByteOrder() {
function writeClientHello(stream, displayNum, authHost)
{
getAuthString( displayNum, authHost, function( authType, authData ) {
getAuthString( displayNum, authHost, function( err, cookie ) {
debugger;
var byte_order = getByteOrder();
var protocol_major = 11; // TODO: config? env?
var protocol_minor = 0;
stream.pack(
'CxSSSSxxpp',
[
'CxSSSSxxpp',
[
byte_order,
protocol_major,
protocol_minor,
authType.length,
authData.length,
authType,
authData
cookie.authName.length,
cookie.authData.length,
cookie.authName,
cookie.authData
]
);
stream.flush();
stream.flush();
});
}

View file

@ -520,8 +520,7 @@ XClient.prototype.expectReplyHeader = function()
);
}
XClient.prototype.startHandshake = function()
{
XClient.prototype.startHandshake = function() {
var client = this;
handshake.writeClientHello(this.pack_stream, this.displayNum, this.authHost);