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Craig P Hicks craigphicks

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craigphicks /
Last active Jul 8, 2020
chromium bug report: "X11 connection rejected because of wrong authentication."

Chrome Version : Chromium 83.0.4103.116 snap Other browsers tested: Add OK or FAIL, along with the version, after other browsers where you have tested this issue:

Firefox: OK, "Mozilla Firefox 78.0.1" Chromium (non-span): OK, "Chromium 83.0.4103.61 Built on Ubuntu , running on Ubuntu 18.04"

What steps will reproduce the problem?


X11 forwarding (which also encrypts X Window System traffic)

X11 forwarding allows the encryption of remote X windows traffic, so that nobody can snoop on your remote xterms or insert malicious commands. The program automatically sets DISPLAY on the server machine, and forwards any X11 connections over the secure channel. Fake Xauthority information is automatically generated and forwarded to the remote machine; the local client automatically examines incoming X11 connections and replaces the fake authorization

View js readStreamToEnd
async function readStreamToEnd(rstream){
let prom=new Promise((resolve,reject)=>{
var buf = Buffer('');
rstream.on('data', function(newbuf) { buf=Buffer.concat([buf,newbuf]); });
rstream.on('end', function() { resolve(buf.toString()); });
rstream.on('error', function(e) { reject(e); });
return await prom;
# copyright craigphicks 2020 - free to use with due attribution
logger -t "confirm_args" -- "#=${#}"
for index in `seq 0 ${#}` ; do
eval item=\$$index
logger -t "confirm_args" -- "[$index] ${item}"
craigphicks / makeNonCryptoRandomAlphaNumString.js
Created Sep 14, 2019
A non-crypto js function for creating random alphanum strings - no dependencies
View makeNonCryptoRandomAlphaNumString.js
function makeNonCryptoRandomAlphaNumString(length) {
function tf(n) {
if (n < 26) return 65 + n
else if (n < 52) return 97 + n - 26
else return 48 + n - 52
var result = ''
for (var i = 0; i < length; i++) {
let idx = Math.floor(Math.random() * 62)
result += String.fromCharCode(tf(idx))
craigphicks /
Last active Aug 16, 2019
Create a non-singleton class from a singleton - yargs

A singleton makes sense when it prevent multiple access to a resource than must not be accessed in that way. But sometimes a singleton design is used because it is sufficient for expected usage. But that may block expanded usage unecessarily.

ES6 dynamic import can import a singelton module into a closure allowing a singleton to become a non-singleton class. See the file yargs-class.mjs below.

The result of test-yargs0class.mjs -

argv[0]= {
craigphicks / extending-error.js
Last active Aug 12, 2019
How to extend error when prepending a message to an existing error which may or may not be instance of Error
View extending-error.js
function showDeep(t){
let o=t
do {
console.log(`--- ${}`)
for (let k of Reflect.ownKeys(o)) {
let d = Reflect.getOwnPropertyDescriptor(o,k)
if (JSON.stringify(d.value)!==undefined) {
console.log(`${k} : ${JSON.stringify(d.value)}`)
if (k==='stack')
console.log("") // funky
craigphicks /
Created Jul 10, 2019
testing javascript setTimeout args, bind, scope.
function test(){
  var x=20;
  var obj = {x:30};
  function logargs(t,arg1,arg2,arg3,arg4) { 
    console.log(`(${t}) this.x=${this.x},x=${x},obj.x=${obj.x},${arg1},${arg2},${arg3},${arg4.x}`); 
craigphicks /
Created Jul 6, 2019
Forwarding `X11` over `ssh` without using `xauth`

Forwarding X11 over ssh without using xauth

  • local -- the local machine serving an Xserver.
  • remote -- the remote machine serving the application which drives the data going to the Xserver

Remote /etc/ssh/sshd_config:

X11Forwarding no
X11DisplayOffset 10
X11UseLocalhost yes
#<UDF name="ssuser" Label="Sudo user username?" example="username" />
#<UDF name="sspassword" Label="Sudo user password?" example="strongPassword" />
#<UDF name="sspubkey" Label="SSH pubkey (installed for root and sudo user)?" example="ssh-rsa ..." />
# initial needfuls
apt-get -o Acquire::ForceIPv4=true update
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