63 lines
1.1 KiB
JavaScript
63 lines
1.1 KiB
JavaScript
'use strict';
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var Enc = require('./bytes.js');
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// To Base64
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Enc.bufToBase64 = function(u8) {
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var bin = '';
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u8.forEach(function(i) {
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bin += String.fromCharCode(i);
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});
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return btoa(bin);
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};
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Enc.strToBase64 = function(str) {
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return btoa(Enc.strToBin(str));
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};
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// From Base64
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function _base64ToBin(b64) {
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return atob(Enc.urlBase64ToBase64(b64));
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}
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Enc._base64ToBin = _base64ToBin;
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Enc.base64ToBuf = function(b64) {
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return Enc.binToBuf(_base64ToBin(b64));
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};
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Enc.base64ToStr = function(b64) {
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return Enc.binToStr(_base64ToBin(b64));
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};
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// URL Safe Base64
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Enc.urlBase64ToBase64 = function(u64) {
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var r = u64 % 4;
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if (2 === r) {
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u64 += '==';
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} else if (3 === r) {
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u64 += '=';
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}
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return u64.replace(/-/g, '+').replace(/_/g, '/');
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};
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Enc.base64ToUrlBase64 = function(b64) {
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return b64
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.replace(/\+/g, '-')
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.replace(/\//g, '_')
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.replace(/=/g, '');
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};
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Enc.bufToUrlBase64 = function(buf) {
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return Enc.base64ToUrlBase64(Enc.bufToBase64(buf));
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};
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Enc.strToUrlBase64 = function(str) {
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return Enc.bufToUrlBase64(Enc.strToBuf(str));
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};
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module.exports = Enc;
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