// This file is part of Moodle - http://moodle.org/
//
// Moodle 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 3 of the License, or
// (at your option) any later version.
//
// Moodle 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 Moodle. If not, see <http://www.gnu.org/licenses/>.
/**
* WebAuthn utility functions, for handling array buffers.
*
* @module factor_webauthn/utils
* @copyright Catalyst IT
* @author Alex Morris <alex.morris@catalyst.net.nz>
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
define([], function() {
return {
recursiveBase64StrToArrayBuffer: function(obj) {
let prefix = '=?BINARY?B?';
let suffix = '?=';
if (typeof obj === 'object') {
for (let key in obj) {
let isString = true;
if (typeof obj[key] !== 'string') {
this.recursiveBase64StrToArrayBuffer(obj[key]);
isString = false;
}
let str = obj[key];
if (isString && str.substring(0, prefix.length) === prefix &&
str.substring(str.length - suffix.length) === suffix) {
str = str.substring(prefix.length, str.length - suffix.length);
const binaryString = window.atob(str);
let len = binaryString.length;
let bytes = new Uint8Array(len);
for (let i = 0; i < len; i++) {
bytes[i] = binaryString.charCodeAt(i);
}
obj[key] = bytes.buffer;
}
}
}
},
arrayBufferToBase64: function(buffer) {
let binary = '';
let bytes = new Uint8Array(buffer);
let len = bytes.byteLength;
for (let i = 0; i < len; i++) {
binary += String.fromCharCode(bytes[i]);
}
return window.btoa(binary);
},
};
});