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Use getRandomValues() for PIN, key, and IV

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This commit is contained in:
Cameron Gutman 2020-07-12 12:11:17 -07:00
parent e83c9ccd10
commit f5788296ac
2 changed files with 22 additions and 6 deletions
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2
static/js/index.js
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@ -275,7 +275,7 @@ function pairTo(nvhttpHost, onSuccess, onFailure) {
return;
}
var randomNumber = String("0000" + (Math.random() * 10000 | 0)).slice(-4);
var randomNumber = String("0000" + cryptoRand(10000)).slice(-4);
var pairingDialog = document.querySelector('#pairingDialog');
$('#pairingDialogText').html('Please enter the number ' + randomNumber + ' on the GFE dialog on the computer. This dialog will be dismissed once complete');
pairingDialog.showModal();

26
static/js/utils.js
View File

@ -14,14 +14,30 @@ function uniqueid() {
}
function generateRemoteInputKey() {
return 'xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx'.replace(/[x]/g, function(c) {
var r = Math.random() * 16 | 0;
return r.toString(16);
});
var array = new Uint8Array(16);
window.crypto.getRandomValues(array);
return Array.from(array, function(byte) {
return ('0' + (byte & 0xFF).toString(16)).slice(-2);
}).join('');
}
function generateRemoteInputKeyId() {
return ((Math.random() - 0.5) * 0x7FFFFFFF) | 0;
// Value must be signed 32-bit int for correct behavior
var array = new Int32Array(1);
window.crypto.getRandomValues(array);
return array[0];
}
// Based on OpenBSD arc4random_uniform()
function cryptoRand(upper_bound) {
var min = (Math.pow(2, 32) - upper_bound) % upper_bound;
var array = new Uint32Array(1);
do {
window.crypto.getRandomValues(array);
} while (array[0] < min);
return array[0] % upper_bound;
}
function getConnectedGamepadMask() {