Validate GitHub WebHook SHA1 Token

gistfile1.txt

    public class GitHubTokenEncoder
    {
        public static string Encode(string body, string token)
        {
            var tokenBytes = Encoding.ASCII.GetBytes(token);
            var tokenHmacSha1 = new HMACSHA1(tokenBytes);
            tokenHmacSha1.Initialize();
            var bodyBytes = Encoding.ASCII.GetBytes(body);
            return BitConverter.ToString(tokenHmacSha1.ComputeHash(bodyBytes)).Replace("-", string.Empty).ToLowerInvariant();
        }
    }