From a743159595e02b3010d3991d6983203407da158b Mon Sep 17 00:00:00 2001
From: icedream <icedream2k9@die-optimisten.net>
Date: Wed, 7 May 2014 11:21:46 -0400
Subject: [PATCH] Added AuthenticationHelper which handles remauth.php and
 /authenticate style token retrieval etc.

---
 libnpsharp.userprefs                          |   8 +-
 .../Authentication/AuthenticationHelper.cs    | 109 ++++++++++++++++++
 src/libnpsharp/libnpsharp.csproj              |   1 +
 3 files changed, 115 insertions(+), 3 deletions(-)
 create mode 100644 src/libnpsharp/Authentication/AuthenticationHelper.cs

diff --git a/libnpsharp.userprefs b/libnpsharp.userprefs
index 337b019..db7fb2f 100644
--- a/libnpsharp.userprefs
+++ b/libnpsharp.userprefs
@@ -1,9 +1,11 @@
 <Properties>
   <MonoDevelop.Ide.Workspace ActiveConfiguration="Debug" />
-  <MonoDevelop.Ide.Workbench ActiveDocument="src/libnpsharp/NpClient.cs">
+  <MonoDevelop.Ide.Workbench ActiveDocument="src/libnpsharp/Authentication/AuthenticationHelper.cs">
     <Files>
-      <File FileName="src/libnpsharp/Rpc/Packets/AuthenticateExternalStatusMessage.cs" Line="1" Column="1" />
-      <File FileName="src/libnpsharp/NpClient.cs" Line="31" Column="45" />
+      <File FileName="src/libnpsharp/Rpc/Packets/AuthenticateExternalStatusMessage.cs" Line="7" Column="8" />
+      <File FileName="src/libnpsharp/NpClient.cs" Line="160" Column="16" />
+      <File FileName="src/libnpsharp/Rpc/RpcClientStream.cs" Line="58" Column="36" />
+      <File FileName="src/libnpsharp/Authentication/AuthenticationHelper.cs" Line="77" Column="4" />
     </Files>
   </MonoDevelop.Ide.Workbench>
   <MonoDevelop.Ide.DebuggingService.Breakpoints>
diff --git a/src/libnpsharp/Authentication/AuthenticationHelper.cs b/src/libnpsharp/Authentication/AuthenticationHelper.cs
new file mode 100644
index 0000000..5d48b69
--- /dev/null
+++ b/src/libnpsharp/Authentication/AuthenticationHelper.cs
@@ -0,0 +1,109 @@
+using System;
+using System.Net;
+using System.IO;
+using System.Text;
+using System.Text.RegularExpressions;
+
+namespace NPSharp.Authentication
+{
+	public class AuthenticationHelper
+	{
+		private string _path;
+		private ushort _port;
+		private string _host;
+
+		/// <summary>
+		/// Gets the username.
+		/// </summary>
+		/// <value>The username.</value>
+		public string Username { get; private set; }
+
+		/// <summary>
+		/// Gets the user's e-mail address.
+		/// </summary>
+		/// <value>The user's e-mail address.</value>
+		public string UserEMail { get; private set; }
+
+		/// <summary>
+		/// Gets the session token.
+		/// </summary>
+		/// <value>The session token.</value>
+		public string SessionToken { get; private set; }
+
+		/// <summary>
+		/// Gets the user identifier.
+		/// </summary>
+		/// <value>The user identifier.</value>
+		public uint UserId { get; private set; }
+
+		/// <summary>
+		/// Initializes a new instance of the <see cref="NPSharp.Authentication.TokenRetriever"/> class.
+		/// </summary>
+		/// <param name="host">Hostname of the authentication endpoint.</param>
+		/// <param name="port">Port of the authentication endpoint.</param>
+		/// <param name="path">Path of the authentication endpoint.</param>
+		public AuthenticationHelper (string host, ushort port = 12003, string path = "/authenticate")
+		{
+			_host = host;
+			_port = port;
+			_path = path;
+		}
+
+		/// <summary>
+		/// Authenticate the specified username and password.
+		/// </summary>
+		/// <param name="username">The username to use for authentication.</param>
+		/// <param name="password">The password to use for authentication.</param>
+		public void Authenticate (string username, string password)
+		{
+			var post = string.Format ("{0}&&{1}", username, password);
+
+			var uri = new UriBuilder {
+				Scheme = "http",
+				Port = _port,
+				Host = _host,
+				Path = _path
+			}.Uri;
+
+			var req = (HttpWebRequest)WebRequest.Create (uri);
+			using (var reqStream = req.GetRequestStream()) {
+				var buffer = Encoding.UTF8.GetBytes (post);
+				reqStream.Write (buffer, 0, post.Length);
+				reqStream.Flush ();
+			}
+			req.Method = "POST";
+			//req.ContentType = "application/x-www-urlencodedform";
+			req.AllowAutoRedirect = true;
+
+			// Response will be in this syntax:
+			// (ok|fail)#text#userid#username#email#sessiontoken
+			var rx = new Regex ("^(?P<status>ok|fail)#(?P<text>.+)#(?P<userid>[0-9]+)#(?P<username>.+)#(?P<usermail>.+)#(?P<sessiontoken>.+)$");
+			var resp = (HttpWebResponse)req.GetResponse ();
+			using (var respStream = resp.GetResponseStream()) {
+				using (var respReader = new StreamReader(respStream)) {
+					while (!respReader.EndOfStream) {
+						var line = respReader.ReadLine ();
+
+						// DW response line found?
+						if (!rx.IsMatch (line))
+							continue;
+
+						// This is a DW response line, analyze
+						var rxm = rx.Match (line);
+
+						// Login succeeded?
+						if (rxm.Groups ["status"].Value != "ok")
+							throw new Exception (rxm.Groups ["text"].Value);
+
+						// Store all data
+						Username = rxm.Groups ["username"].Value;
+						UserEMail = rxm.Groups ["usermail"].Value;
+						SessionToken = rxm.Groups ["sessiontoken"].Value;
+						UserId = uint.Parse (rxm.Groups ["userid"].Value);
+					}
+				}
+			}
+		}
+	}
+}
+
diff --git a/src/libnpsharp/libnpsharp.csproj b/src/libnpsharp/libnpsharp.csproj
index d953e3a..58d5493 100644
--- a/src/libnpsharp/libnpsharp.csproj
+++ b/src/libnpsharp/libnpsharp.csproj
@@ -71,6 +71,7 @@
     <Compile Include="Rpc\Packets\StorageWriteUserFileMessage.cs" />
     <Compile Include="Rpc\Packets\StorageWriteUserFileResultMessage.cs" />
     <Compile Include="Properties\AssemblyInfo.cs" />
+    <Compile Include="Authentication\AuthenticationHelper.cs" />
   </ItemGroup>
   <ItemGroup />
   <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />