rasha.js/lib/encoding.js

'use strict';

var Enc = module.exports;

Enc.bufToHex = function toHex(u8) {
  var hex = [];
  var i, h;

  for (i = 0; i < u8.byteLength; i += 1) {
    h = u8[i].toString(16);
    if (2 !== h.length) { h = '0' + h; }
    hex.push(h);
  }

  return hex.join('').toLowerCase();
};

Enc.bufToBase64 = function toHex(u8) {
  // we want to maintain api compatability with browser APIs,
  // so we assume that this could be a Uint8Array
  return Buffer.from(u8).toString('base64');
};

Enc.bufToUrlBase64 = function toHex(u8) {
  return Enc.bufToBase64(u8)
    .replace(/\+/g, '-').replace(/\//g, '_').replace(/=/g, '');
};

/*
Enc.strToBin = function strToBin(str) {
  var escstr = encodeURIComponent(str);
  // replaces any uri escape sequence, such as %0A,
  // with binary escape, such as 0x0A
  var binstr = escstr.replace(/%([0-9A-F]{2})/g, function(match, p1) {
    return String.fromCharCode(parseInt(p1, 16));
  });

  return binstr;
};
*/

/*
Enc.strToBase64 = function strToBase64(str) {
	// node automatically can tell the difference
	// between uc2 (utf-8) strings and binary strings
	// so we don't have to re-encode the strings
	return Buffer.from(str).toString('base64');
};
*/

/*
Enc.urlBase64ToBase64 = function urlsafeBase64ToBase64(str) {
  var r = str % 4;
  if (2 === r) {
    str += '==';
  } else if (3 === r) {
    str += '=';
  }
  return str.replace(/-/g, '+').replace(/_/g, '/');
};
*/

Enc.base64ToBuf = function base64ToBuf(str) {
	// always convert from urlsafe base64, just in case
	//return Buffer.from(Enc.urlBase64ToBase64(str)).toString('base64');
	return Buffer.from(str, 'base64');
};