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nacl-util.js
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nacl-util.js
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// Written in 2014-2016 by Dmitry Chestnykh and Devi Mandiri.
// Public domain.
const util = {};
export default util;
function validateBase64(s) {
if (!(/^(?:[A-Za-z0-9+/]{4})*(?:[A-Za-z0-9+/]{2}==|[A-Za-z0-9+/]{3}=)?$/.test(s))) {
throw new TypeError('invalid encoding');
}
}
util.decodeUTF8 = function(s) {
if (typeof s !== 'string') throw new TypeError('expected string');
var i, d = unescape(encodeURIComponent(s)), b = new Uint8Array(d.length);
for (i = 0; i < d.length; i++) b[i] = d.charCodeAt(i);
return b;
};
util.encodeUTF8 = function(arr) {
var i, s = [];
for (i = 0; i < arr.length; i++) s.push(String.fromCharCode(arr[i]));
return decodeURIComponent(escape(s.join('')));
};
if (typeof atob === 'undefined') {
// Node.js
util.encodeBase64 = function (arr) {
return Buffer.from(arr).toString('base64');
};
util.decodeBase64 = function (s) {
validateBase64(s);
return new Uint8Array(Array.prototype.slice.call(Buffer.from(s, 'base64'), 0));
};
} else {
// Browsers
util.encodeBase64 = function(arr) {
var i, s = [], len = arr.length;
for (i = 0; i < len; i++) s.push(String.fromCharCode(arr[i]));
return btoa(s.join(''));
};
util.decodeBase64 = function(s) {
validateBase64(s);
var i, d = atob(s), b = new Uint8Array(d.length);
for (i = 0; i < d.length; i++) b[i] = d.charCodeAt(i);
return b;
};
}