mcs/class/System/System.Net/HttpListenerContext.cs

   1 //
   2 // System.Net.HttpListenerContext
   3 //
   4 // Author:
   5 //      Gonzalo Paniagua Javier (gonzalo@novell.com)
   6 //
   7 // Copyright (c) 2005 Novell, Inc. (http://www.novell.com)
   8 //
   9 // Permission is hereby granted, free of charge, to any person obtaining
  10 // a copy of this software and associated documentation files (the
  11 // "Software"), to deal in the Software without restriction, including
  12 // without limitation the rights to use, copy, modify, merge, publish,
  13 // distribute, sublicense, and/or sell copies of the Software, and to
  14 // permit persons to whom the Software is furnished to do so, subject to
  15 // the following conditions:
  16 //
  17 // The above copyright notice and this permission notice shall be
  18 // included in all copies or substantial portions of the Software.
  19 //
  20 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  21 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  22 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  23 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  24 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  25 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  26 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  27 //
  28
  29 #if SECURITY_DEP
  30
  31 using System.Collections.Specialized;
  32 using System.IO;
  33 using System.Security.Principal;
  34 using System.Text;
  35 namespace System.Net {
  36         public sealed class HttpListenerContext {
  37                 HttpListenerRequest request;
  38                 HttpListenerResponse response;
  39                 IPrincipal user;
  40                 HttpConnection cnc;
  41                 string error;
  42                 int err_status = 400;
  43                 internal HttpListener Listener;
  44
  45                 internal HttpListenerContext (HttpConnection cnc)
  46                 {
  47                         this.cnc = cnc;
  48                         request = new HttpListenerRequest (this);
  49                         response = new HttpListenerResponse (this);
  50                 }
  51
  52                 internal int ErrorStatus {
  53                         get { return err_status; }
  54                         set { err_status = value; }
  55                 }
  56
  57                 internal string ErrorMessage {
  58                         get { return error; }
  59                         set { error = value; }
  60                 }
  61
  62                 internal bool HaveError {
  63                         get { return (error != null); }
  64                 }
  65
  66                 internal HttpConnection Connection {
  67                         get { return cnc; }
  68                 }
  69
  70                 public HttpListenerRequest Request {
  71                         get { return request; }
  72                 }
  73
  74                 public HttpListenerResponse Response {
  75                         get { return response; }
  76                 }
  77
  78                 public IPrincipal User {
  79                         get { return user; }
  80                 }
  81
  82                 internal void ParseAuthentication (AuthenticationSchemes expectedSchemes) {
  83                         if (expectedSchemes == AuthenticationSchemes.Anonymous)
  84                                 return;
  85
  86                         // TODO: Handle NTLM/Digest modes
  87                         string header = request.Headers ["Authorization"];
  88                         if (header == null || header.Length < 2)
  89                                 return;
  90
  91                         string [] authenticationData = header.Split (new char [] {' '}, 2);
  92                         if (string.Compare (authenticationData [0], "basic", true) == 0) {
  93                                 user = ParseBasicAuthentication (authenticationData [1]);
  94                         }
  95                         // TODO: throw if malformed -> 400 bad request
  96                 }
  97
  98                 internal IPrincipal ParseBasicAuthentication (string authData) {
  99                         try {
 100                                 // Basic AUTH Data is a formatted Base64 String
 101                                 //string domain = null;
 102                                 string user = null;
 103                                 string password = null;
 104                                 int pos = -1;
 105                                 string authString = System.Text.Encoding.Default.GetString (Convert.FromBase64String (authData));
 106
 107                                 // The format is DOMAIN\username:password
 108                                 // Domain is optional
 109
 110                                 pos = authString.IndexOf (':');
 111
 112                                 // parse the password off the end
 113                                 password = authString.Substring (pos+1);
 114
 115                                 // discard the password
 116                                 authString = authString.Substring (0, pos);
 117
 118                                 // check if there is a domain
 119                                 pos = authString.IndexOf ('\\');
 120
 121                                 if (pos > 0) {
 122                                         //domain = authString.Substring (0, pos);
 123                                         user = authString.Substring (pos);
 124                                 } else {
 125                                         user = authString;
 126                                 }
 127
 128                                 HttpListenerBasicIdentity identity = new HttpListenerBasicIdentity (user, password);
 129                                 // TODO: What are the roles MS sets
 130                                 return new GenericPrincipal (identity, new string [0]);
 131                         } catch (Exception) {
 132                                 // Invalid auth data is swallowed silently
 133                                 return null;
 134                         }
 135                 }
 136         }
 137 }
 138 #endif
 139