public static byte[] EncodeCookie(Auth0Token token)
{
var bytes = token.ToBytes();
for (int i = 0; i < DefaultCookieTransforms.Length; ++i)
{
bytes = DefaultCookieTransforms[i].Encode(bytes);
}
return(bytes);
}
public static void WriteSessionCookie(HttpApplication application, Auth0Token token)
{
var request = application.Context.Request;
var response = application.Context.Response;
var bytes = EncodeCookie(token);
var cookie = Convert.ToBase64String(bytes);
var chunkCount = cookie.Length / CookieChunkSize + (cookie.Length % CookieChunkSize == 0 ? 0 : 1);
for (int i = 0; i < chunkCount; ++i)
{
var setCookie = new StringBuilder();
setCookie.Append(LiveAuth);
if (i > 0)
{
setCookie.Append(i.ToString(CultureInfo.InvariantCulture));
}
setCookie.Append('=');
int startIndex = i * CookieChunkSize;
setCookie.Append(cookie.Substring(startIndex, Math.Min(CookieChunkSize, cookie.Length - startIndex)));
setCookie.Append("; path=/");
if (request.Url.Scheme == "https")
{
setCookie.Append("; secure");
}
setCookie.Append("; HttpOnly");
response.Headers.Add("Set-Cookie", setCookie.ToString());
}
var cookies = request.Cookies;
var index = chunkCount;
while (true)
{
var cookieName = LiveAuth;
if (index > 0)
{
cookieName += index.ToString(CultureInfo.InvariantCulture);
}
if (cookies[cookieName] == null)
{
break;
}
// remove old cookie
response.Headers.Add("Set-Cookie", String.Format(DeleteCookieFormat, cookieName));
++index;
}
}
public static Auth0Token DecodeCookie(byte[] bytes)
{
try
{
for (int i = DefaultCookieTransforms.Length - 1; i >= 0; --i)
{
bytes = DefaultCookieTransforms[i].Decode(bytes);
}
return(Auth0Token.FromBytes(bytes));
}
catch (Exception ex)
{
Auth0Trace.WriteLine("DecodeCookie failed with {0}", ex);
// bad cookie
return(null);
}
}
public static Auth0Token AuthenticateUser(HttpApplication application, out string redirectUri)
{
redirectUri = null;
var request = application.Context.Request;
var requestUrl = new Uri(request.Url, request.RawUrl);
if (!requestUrl.AbsolutePath.Equals(LoginCallbackPath, StringComparison.OrdinalIgnoreCase))
{
return(ReadSessionCookie(application));
}
var query = HttpUtility.ParseQueryString(requestUrl.Query);
var code = query["code"];
if (String.IsNullOrEmpty(code))
{
return(ReadSessionCookie(application));
}
var tokenRequestUri = String.Format("https://{0}/oauth/token", Auth0Domain);
var client_id = Auth0ClientId;
var client_secret = Auth0ClientSecret;
var redirect_uri = GetRedirectUrl(application);
var payload = new StringBuilder("grant_type=authorization_code");
payload.AppendFormat("&client_id={0}", WebUtility.UrlEncode(client_id));
payload.AppendFormat("&client_secret={0}", WebUtility.UrlEncode(client_secret));
payload.AppendFormat("&redirect_uri={0}", WebUtility.UrlEncode(redirect_uri));
payload.AppendFormat("&code={0}", WebUtility.UrlEncode(code));
var webRequest = (HttpWebRequest)WebRequest.Create(tokenRequestUri);
webRequest.Method = "POST";
webRequest.ContentType = "application/x-www-form-urlencoded";
using (var stream = webRequest.GetRequestStream())
{
var bytes = Encoding.UTF8.GetBytes(payload.ToString());
stream.Write(bytes, 0, bytes.Length);
}
try
{
var webResponse = (HttpWebResponse)webRequest.GetResponse();
using (var stream = webResponse.GetResponseStream())
{
var token = Auth0Token.FromStream(stream);
WriteSessionCookie(application, token);
redirectUri = query["state"];
return(token);
}
}
catch (WebException ex)
{
Auth0Trace.WriteLine("POST {0} failed with {1}", tokenRequestUri, ex);
throw HandleOAuthError(ex, tokenRequestUri);
}
}
