How to convert byte array to hex string

Question

I have a byte array and want convert it into hex string. I am using the following code to do this:

function toHexString(bytes) {

  return bytes.map(function(byte) {

    return (byte & 0xFF).toString(16)

  }).join('')

}

But I am not getting the right result. Where am I going wrong? How to do this right?

Answer 1

You are missing the padding in the hex conversion in your code. Try the following code.

function toHexString(byteArray) {

  return Array.from(byteArray, function(byte) {

    return ('0' + (byte & 0xFF).toString(16)).slice(-2);

  }).join('')

}

The output should be:

04812d7e3a9829e5d51bdd64ceb35df060699bc1309731bd6e6f1a5443a7f9ce0af4382fcfd6f5f8a08bb2619709c2d49fb771601770f2c267985af2754e1f8cf9