On a C# ASP.NET application, I've managed to bypass basic authentication (by sending the username/password through "Authorization" headers on a HTTPWebRequest) and I finally got the unlocked the target page that is protected by htaccess (located on a different server, basic auth) and sent the stream back to the browser.
The issue appears as soon as the user clicks on a link, the basic auth logon box pops up again. We don't want the user to enter to username/password again.
It seems that I need to be sending something back in the headers to tell the browser what username/password it's using for authorization.
I've tried:
- Old "username:password@host" format (insecure, not allowed on IE anymore).
- HTTPWebRequest, which gives me the issue described before.
Considerations:
- The remote server being accessed is a black box.
Is there a way to achieve this? (It can be done in JavaScript as well).
This is my function for the HttpRequest:
public void DoWebRequest(String email, String psw, String hostname,
int port, String req_method, String webpage)
{
String path = hostname + ":" + port + "/" + webpage;
String userdata = email + ":" + psw;
System.Text.ASCIIEncoding encoding = new ASCIIEncoding();
byte[] data = encoding.GetBytes(path);
byte[] authBytes = Encoding.UTF8.GetBytes(userdata.ToCharArray());
String req_short_host_temp = hostname;
String req_short_host = req_short_host_temp.Replace("http://", "");
Uri uri = new Uri(path);
HttpWebRequest req = (HttpWebRequest)HttpWebRequest.Create(uri) as HttpWebRequest;
req.UserAgent = "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; .NET CLR 1.0.3705;)";
req.Method = req_method;
req.PreAuthenticate = false;
req.Headers["Authorization"] = "Basic " + Convert.ToBase64String(authBytes);
req.Accept = "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8";
req.Headers.Add("Accept-Language: en-us,en;q=0.5");
req.Headers.Add("Accept-Encoding: gzip,deflate");
req.Headers.Add("Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7");
req.KeepAlive = true;
req.Headers.Add("Keep-Alive: 1000");
req.ReadWriteTimeout = 320000;
req.Timeout = 320000;
req.Host = req_short_host;
req.AllowAutoRedirect = true;
req.ContentType = "application/x-www-form-urlencoded";
req.Headers.GetType().InvokeMember("ChangeInternal", BindingFlags.NonPublic | BindingFlags.Instance | BindingFlags.InvokeMethod, null, req.Headers, new object[] { "Host", req_short_host });
var headers = new MyHeaderCollection();
req.Headers = headers;
headers.Set("Host", req_short_host);
StreamWriter sw = new StreamWriter(req.GetRequestStream());
sw.Write("/" + "?user=" + email + "&password=" + psw);
sw.Close();
HttpWebResponse response = (HttpWebResponse)req.GetResponse();
StreamReader reader = new StreamReader(response.GetResponseStream());
string tmp = reader.ReadToEnd();
foreach (Cookie cook in response.Cookies)
{
tmp += "\n" + cook.Name + ": " + cook.Value;
}
Response.Write(tmp);
Response.End();
}
