bitwise-xor/index.js

Bitwise XOR between two Buffers or Strings, returns a Buffer

module.exports = xor

function xor(a, b) {
  if (!Buffer.isBuffer(a)) a = new Buffer(a)
  if (!Buffer.isBuffer(b)) b = new Buffer(b)
  var res = []
  if (a.length > b.length) {
    for (var i = 0; i < b.length; i++) {
      res.push(a[i] ^ b[i])
    }
  } else {
    for (var i = 0; i < a.length; i++) {
      res.push(a[i] ^ b[i])
    }
  }
  return new Buffer(res);
}