class/corlib/System.Security.Principal/WindowsIdentity.cs

   1 //
   2 // System.Security.Principal.WindowsIdentity
   3 //
   4 // Authors:
   5 //      Gonzalo Paniagua Javier (gonzalo@ximian.com)
   6 //      Sebastien Pouliot (sebastien@ximian.com)
   7 //
   8 // (C) 2002 Ximian, Inc (http://www.ximian.com)
   9 // Portions (C) 2003 Motus Technologies Inc. (http://www.motus.com)
  10 // Copyright (C) 2004-2005 Novell, Inc (http://www.novell.com)
  11 //
  12 // Permission is hereby granted, free of charge, to any person obtaining
  13 // a copy of this software and associated documentation files (the
  14 // "Software"), to deal in the Software without restriction, including
  15 // without limitation the rights to use, copy, modify, merge, publish,
  16 // distribute, sublicense, and/or sell copies of the Software, and to
  17 // permit persons to whom the Software is furnished to do so, subject to
  18 // the following conditions:
  19 //
  20 // The above copyright notice and this permission notice shall be
  21 // included in all copies or substantial portions of the Software.
  22 //
  23 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  24 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  25 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  26 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  27 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  28 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  29 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  30 //
  31
  32 using System.Runtime.CompilerServices;
  33 using System.Runtime.InteropServices;
  34 using System.Runtime.Serialization;
  35 using System.Security.Permissions;
  36
  37 namespace System.Security.Principal {
  38
  39         [Serializable]
  40         [ComVisible (true)]
  41         public class WindowsIdentity : IIdentity, IDeserializationCallback, ISerializable, IDisposable {
  42                 private IntPtr _token;
  43                 private string _type;
  44                 private WindowsAccountType _account;
  45                 private bool _authenticated;
  46                 private string _name;
  47                 private SerializationInfo _info;
  48
  49                 static private IntPtr invalidWindows = IntPtr.Zero;
  50
  51                 [SecurityPermission (SecurityAction.Demand, ControlPrincipal=true)]
  52                 public WindowsIdentity (IntPtr userToken)
  53                         : this (userToken, null, WindowsAccountType.Normal, false)
  54                 {
  55                 }
  56
  57                 [SecurityPermission (SecurityAction.Demand, ControlPrincipal=true)]
  58                 public WindowsIdentity (IntPtr userToken, string type)
  59                         : this (userToken, type, WindowsAccountType.Normal, false)
  60                 {
  61                 }
  62
  63                 [SecurityPermission (SecurityAction.Demand, ControlPrincipal=true)]
  64                 public WindowsIdentity (IntPtr userToken, string type, WindowsAccountType acctType)
  65                         : this (userToken, type, acctType, false)
  66                 {
  67                 }
  68
  69                 [SecurityPermission (SecurityAction.Demand, ControlPrincipal=true)]
  70                 public WindowsIdentity (IntPtr userToken, string type, WindowsAccountType acctType, bool isAuthenticated)
  71                 {
  72                         _type = type;
  73                         _account = acctType;
  74                         _authenticated = isAuthenticated;
  75                         _name = null;
  76                         // last - as it can override some fields
  77                         SetToken (userToken);
  78                 }
  79 #if !NET_1_0
  80                 [SecurityPermission (SecurityAction.Demand, ControlPrincipal=true)]
  81                 public WindowsIdentity (string sUserPrincipalName)
  82                         : this (sUserPrincipalName, null)
  83                 {
  84                 }
  85
  86                 [SecurityPermission (SecurityAction.Demand, ControlPrincipal=true)]
  87                 public WindowsIdentity (string sUserPrincipalName, string type)
  88                 {
  89                         if (sUserPrincipalName == null)
  90                                 throw new NullReferenceException ("sUserPrincipalName");
  91
  92                         // TODO: Windows 2003 compatibility should be done in runtime
  93                         IntPtr token = GetUserToken (sUserPrincipalName);
  94                         if ((!Environment.IsUnix) && (token == IntPtr.Zero)) {
  95                                 throw new ArgumentException ("only for Windows Server 2003 +");
  96                         }
  97
  98                         _authenticated = true;
  99                         _account = WindowsAccountType.Normal;
 100                         _type = type;
 101                         // last - as it can override some fields
 102                         SetToken (token);
 103                 }
 104
 105                 [SecurityPermission (SecurityAction.Demand, ControlPrincipal=true)]
 106                 public WindowsIdentity (SerializationInfo info, StreamingContext context)
 107                 {
 108                         _info = info;
 109                 }
 110 #endif
 111
 112                 [ComVisible (false)]
 113                 public void Dispose ()
 114                 {
 115                         _token = IntPtr.Zero;
 116                 }
 117
 118                 [ComVisible (false)]
 119                 protected virtual void Dispose (bool disposing)
 120                 {
 121                         _token = IntPtr.Zero;
 122                 }
 123                 // static methods
 124
 125                 public static WindowsIdentity GetAnonymous ()
 126                 {
 127                         WindowsIdentity id = null;
 128                         if (Environment.IsUnix) {
 129                                 id = new WindowsIdentity ("nobody");
 130                                 // special case
 131                                 id._account = WindowsAccountType.Anonymous;
 132                                 id._authenticated = false;
 133                                 id._type = String.Empty;
 134                         }
 135                         else {
 136                                 id = new WindowsIdentity (IntPtr.Zero, String.Empty, WindowsAccountType.Anonymous, false);
 137                                 // special case (don't try to resolve the name)
 138                                 id._name = String.Empty;
 139                         }
 140                         return id;
 141                 }
 142
 143                 public static WindowsIdentity GetCurrent ()
 144                 {
 145                         return new WindowsIdentity (GetCurrentToken (), null, WindowsAccountType.Normal, true);
 146                 }
 147                 [MonoTODO ("need icall changes")]
 148                 public static WindowsIdentity GetCurrent (bool ifImpersonating)
 149                 {
 150                         throw new NotImplementedException ();
 151                 }
 152
 153                 [MonoTODO ("need icall changes")]
 154                 public static WindowsIdentity GetCurrent (TokenAccessLevels desiredAccess)
 155                 {
 156                         throw new NotImplementedException ();
 157                 }
 158                 // methods
 159
 160                 public virtual WindowsImpersonationContext Impersonate ()
 161                 {
 162                         return new WindowsImpersonationContext (_token);
 163                 }
 164
 165                 [SecurityPermission (SecurityAction.Demand, ControlPrincipal=true)]
 166                 public static WindowsImpersonationContext Impersonate (IntPtr userToken)
 167                 {
 168                         return new WindowsImpersonationContext (userToken);
 169                 }
 170
 171                 // properties
 172
 173                 public string AuthenticationType {
 174                         get { return _type; }
 175                 }
 176
 177                 public virtual bool IsAnonymous
 178                 {
 179                         get { return (_account == WindowsAccountType.Anonymous); }
 180                 }
 181
 182                 public virtual bool IsAuthenticated
 183                 {
 184                         get { return _authenticated; }
 185                 }
 186
 187                 public virtual bool IsGuest
 188                 {
 189                         get { return (_account == WindowsAccountType.Guest); }
 190                 }
 191
 192                 public virtual bool IsSystem
 193                 {
 194                         get { return (_account == WindowsAccountType.System); }
 195                 }
 196
 197                 public virtual string Name
 198                 {
 199                         get {
 200                                 if (_name == null) {
 201                                         // revolve name (runtime)
 202                                         _name = GetTokenName (_token);
 203                                 }
 204                                 return _name;
 205                         }
 206                 }
 207
 208                 public virtual IntPtr Token
 209                 {
 210                         get { return _token; }
 211                 }
 212                 [MonoTODO ("not implemented")]
 213                 public IdentityReferenceCollection Groups {
 214                         get { throw new NotImplementedException (); }
 215                 }
 216
 217                 [MonoTODO ("not implemented")]
 218                 [ComVisible (false)]
 219                 public TokenImpersonationLevel ImpersonationLevel {
 220                         get { throw new NotImplementedException (); }
 221                 }
 222
 223                 [MonoTODO ("not implemented")]
 224                 [ComVisible (false)]
 225                 public SecurityIdentifier Owner {
 226                         get { throw new NotImplementedException (); }
 227                 }
 228
 229                 [MonoTODO ("not implemented")]
 230                 [ComVisible (false)]
 231                 public SecurityIdentifier User {
 232                         get { throw new NotImplementedException (); }
 233                 }
 234                 void IDeserializationCallback.OnDeserialization (object sender)
 235                 {
 236                         _token = (IntPtr) _info.GetValue ("m_userToken", typeof (IntPtr));
 237                         // can't trust this alone - we must validate the token
 238                         _name = _info.GetString ("m_name");
 239                         if (_name != null) {
 240                                 // validate token by comparing names
 241                                 string name = GetTokenName (_token);
 242                                 if (name != _name)
 243                                         throw new SerializationException ("Token-Name mismatch.");
 244                         }
 245                         else {
 246                                 // validate token by getting name
 247                                 _name = GetTokenName (_token);
 248                                 if ((_name == String.Empty) || (_name == null))
 249                                         throw new SerializationException ("Token doesn't match a user.");
 250                         }
 251                         _type = _info.GetString ("m_type");
 252                         _account = (WindowsAccountType) _info.GetValue ("m_acctType", typeof (WindowsAccountType));
 253                         _authenticated = _info.GetBoolean ("m_isAuthenticated");
 254                 }
 255 #if !NET_1_0
 256                 void ISerializable.GetObjectData (SerializationInfo info, StreamingContext context)
 257                 {
 258                         info.AddValue ("m_userToken", _token);
 259                         // can be null when not resolved
 260                         info.AddValue ("m_name", _name);
 261                         info.AddValue ("m_type", _type);
 262                         info.AddValue ("m_acctType", _account);
 263                         info.AddValue ("m_isAuthenticated", _authenticated);
 264                 }
 265 #endif
 266                 private void SetToken (IntPtr token)
 267                 {
 268                         if (Environment.IsUnix) {
 269
 270                                 _token = token;
 271                                 // apply defaults
 272                                 if (_type == null)
 273                                         _type = "POSIX";
 274                                 // override user choice in this specific case
 275                                 if (_token == IntPtr.Zero)
 276                                         _account = WindowsAccountType.System;
 277                         }
 278                         else {
 279                                 if ((token == invalidWindows) && (_account != WindowsAccountType.Anonymous))
 280                                         throw new ArgumentException ("Invalid token");
 281
 282                                 _token = token;
 283                                 // apply defaults
 284                                 if (_type == null)
 285                                         _type = "NTLM";
 286                         }
 287                 }
 288
 289                 // see mono/mono/metadata/security.c for implementation
 290
 291                 // Many people use reflection to get a user's roles - so many
 292                 // that's it's hard to say it's an "undocumented" feature -
 293                 // so we also implement it in Mono :-/
 294                 // http://www.dotnet247.com/247reference/msgs/39/195403.aspx
 295                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 296                 internal extern static string[] _GetRoles (IntPtr token);
 297
 298                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 299                 internal extern static IntPtr GetCurrentToken ();
 300
 301                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 302                 private extern static string GetTokenName (IntPtr token);
 303
 304                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 305                 private extern static IntPtr GetUserToken (string username);
 306         }
 307 }