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104 lines
2.2 KiB
104 lines
2.2 KiB
'use strict';
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var Enc = module.exports;
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Enc.base64ToBuf = function (str) {
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// always convert from urlsafe base64, just in case
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//return Buffer.from(Enc.urlBase64ToBase64(str)).toString('base64');
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// node handles urlBase64 automatically
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return Buffer.from(str, 'base64');
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};
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Enc.base64ToHex = function (b64) {
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return Enc.bufToHex(Enc.base64ToBuf(b64));
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};
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Enc.bufToBase64 = function (u8) {
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// we want to maintain api compatability with browser APIs,
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// so we assume that this could be a Uint8Array
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return Buffer.from(u8).toString('base64');
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};
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/*
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Enc.bufToUint8 = function bufToUint8(buf) {
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return new Uint8Array(buf.buffer.slice(buf.byteOffset, buf.byteOffset + buf.byteLength));
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};
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*/
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Enc.bufToUrlBase64 = function (u8) {
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return Enc.bufToBase64(u8)
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.replace(/\+/g, '-').replace(/\//g, '_').replace(/=/g, '');
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};
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Enc.bufToHex = function (u8) {
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var hex = [];
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var i, h;
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var len = (u8.byteLength || u8.length);
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for (i = 0; i < len; i += 1) {
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h = u8[i].toString(16);
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if (2 !== h.length) { h = '0' + h; }
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hex.push(h);
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}
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return hex.join('').toLowerCase();
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};
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Enc.hexToBase64 = function (hex) {
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return Buffer.from(hex, 'hex').toString('base64');
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};
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Enc.hexToBuf = function (hex) {
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return Buffer.from(hex, 'hex');
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};
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Enc.numToHex = function (d) {
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d = d.toString(16);
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if (d.length % 2) {
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return '0' + d;
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}
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return d;
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};
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/*
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Enc.strToBase64 = function (str) {
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// node automatically can tell the difference
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// between uc2 (utf-8) strings and binary strings
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// so we don't have to re-encode the strings
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return Buffer.from(str).toString('base64');
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};
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*/
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/*
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Enc.strToBin = function (str) {
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var escstr = encodeURIComponent(str);
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// replaces any uri escape sequence, such as %0A,
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// with binary escape, such as 0x0A
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var binstr = escstr.replace(/%([0-9A-F]{2})/g, function(match, p1) {
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return String.fromCharCode(parseInt(p1, 16));
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});
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return binstr;
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};
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*/
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Enc.strToBuf = function (str) {
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return Buffer.from(str);
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};
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Enc.strToHex = function (str) {
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return Buffer.from(str).toString('hex');
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};
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/*
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Enc.urlBase64ToBase64 = function (str) {
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var r = str % 4;
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if (2 === r) {
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str += '==';
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} else if (3 === r) {
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str += '=';
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}
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return str.replace(/-/g, '+').replace(/_/g, '/');
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};
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*/
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