SHA256 HMAC In CSharp

Development Material - Information posted here is for developer reference only. This material is subject to possible change and will be technical in nature.

The following is an implementation of the SHA256 HMAC authentication used in protocol versions 1202 and above:

using System.Text;
using System.Security.Cryptography;

public static string GenerateNewHMAC(string password, string challenge)
{
       HMACSHA256 hmc = new HMACSHA256(Encoding.ASCII.GetBytes(password));
       byte[] hmres = hmc.ComputeHash(Encoding.ASCII.GetBytes(challenge));
       return Convert.ToBase64String(hmres).Replace("=", "");
}