SSO Login for Freshdesk support portal - ASP.Net C# Sample Code

sso_login_freshdesk.cs

static string GetSsoUrl(string baseUrl, string secret, string name, string email) {
    var timems = (DateTime.UtcNow.Subtract(new DateTime(1970, 1, 1))).TotalSeconds.ToString();
    return String.Format("{0}/login/sso?name={1}&email={2}&timestamp={3}&hash={4}",
        baseUrl, Server.UrlEncode(name), Server.UrlEncode(email), timems, GetHash(secret, name, email, timems));
}

private static string GetHash(string secret, string name, string email, string timems) {
    var input = name + secret + email + timems;
    var keybytes = Encoding.Default.GetBytes(secret);
    var inputBytes = Encoding.Default.GetBytes(input);
    var crypto = new HMACMD5(keybytes);
    var hash = crypto.ComputeHash(inputBytes);
    return hash.Select(b => b.ToString("x2"))
        .Aggregate(new StringBuilder(),
            (current, next) => current.Append(next),
            current => current.ToString());
}