Convert a hex string to base64

Question

byte[] ba = Encoding.Default.GetBytes(input);
var hexString = BitConverter.ToString(ba);
hexString = hexString.Replace(\"-\", \"\");
Console.WriteLine(\"Or: \" + hexStri         


        

Answer 1

public string HexToBase64(string strInput)
{
    try
    {
        var bytes = new byte[strInput.Length / 2];
        for (var i = 0; i < bytes.Length; i++)
        {
            bytes[i] = Convert.ToByte(strInput.Substring(i * 2, 2), 16);
        }
        return Convert.ToBase64String(bytes);
    }
    catch (Exception)
    {
        return "-1";
    }
}

On the contrary: https://stackoverflow.com/a/61224900/3988122

Answer 2

You first need to convert your hexstring to a byte-array, which you can then convert to base-64.

To convert from your hexstring to Base-64, you can use:

 public static string HexString2B64String(this string input)
 {
     return System.Convert.ToBase64String(input.HexStringToHex());
 }

Where HexStringToHex is:

public static byte[] HexStringToHex(this string inputHex)
{
    var resultantArray = new byte[inputHex.Length / 2];
    for (var i = 0; i < resultantArray.Length; i++)
    {
        resultantArray[i] = System.Convert.ToByte(inputHex.Substring(i * 2, 2), 16);
    }
    return resultantArray;
}