mcs/class/System.Web/System.Web.Security/FormsAuthentication.cs

   1 //
   2 // System.Web.Security.FormsAuthentication
   3 //
   4 // Authors:
   5 //      Gonzalo Paniagua Javier (gonzalo@ximian.com)
   6 //
   7 // (C) 2002,2003 Ximian, Inc (http://www.ximian.com)
   8 // Copyright (c) 2005 Novell, Inc (http://www.novell.com)
   9 //
  10
  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.Collections;
  33 using System.IO;
  34 using System.Security.Cryptography;
  35 using System.Security.Permissions;
  36 using System.Text;
  37 using System.Web;
  38 using System.Web.Configuration;
  39 using System.Web.Util;
  40 using System.Globalization;
  41
  42 namespace System.Web.Security
  43 {
  44         // CAS - no InheritanceDemand here as the class is sealed
  45         [AspNetHostingPermission (SecurityAction.LinkDemand, Level = AspNetHostingPermissionLevel.Minimal)]
  46         public sealed class FormsAuthentication
  47         {
  48                 const int MD5_hash_size = 16;
  49                 const int SHA1_hash_size = 20;
  50
  51                 static string authConfigPath = "system.web/authentication";
  52                 static string machineKeyConfigPath = "system.web/machineKey";
  53 #if TARGET_J2EE
  54                 const string Forms_initialized = "Forms.initialized";
  55                 const string Forms_cookieName = "Forms.cookieName";
  56                 const string Forms_cookiePath = "Forms.cookiePath";
  57                 const string Forms_timeout = "Forms.timeout";
  58                 const string Forms_protection = "Forms.protection";
  59                 const string Forms_init_vector = "Forms.init_vector";
  60                 static bool initialized
  61                 {
  62                         get {
  63                                 object o = AppDomain.CurrentDomain.GetData (Forms_initialized);
  64                                 return o != null ? (bool) o : false;
  65                         }
  66                         set { AppDomain.CurrentDomain.SetData (Forms_initialized, value); }
  67                 }
  68                 static string cookieName
  69                 {
  70                         get { return (string) AppDomain.CurrentDomain.GetData (Forms_cookieName); }
  71                         set { AppDomain.CurrentDomain.SetData (Forms_cookieName, value); }
  72                 }
  73                 static string cookiePath
  74                 {
  75                         get { return (string) AppDomain.CurrentDomain.GetData (Forms_cookiePath); }
  76                         set { AppDomain.CurrentDomain.SetData (Forms_cookiePath, value); }
  77                 }
  78                 static int timeout
  79                 {
  80                         get {
  81                                 object o = AppDomain.CurrentDomain.GetData (Forms_timeout);
  82                                 return o != null ? (int) o : 0;
  83                         }
  84                         set { AppDomain.CurrentDomain.SetData (Forms_timeout, value); }
  85                 }
  86                 static FormsProtectionEnum protection
  87                 {
  88                         get { return (FormsProtectionEnum) AppDomain.CurrentDomain.GetData (Forms_protection); }
  89                         set { AppDomain.CurrentDomain.SetData (Forms_protection, value); }
  90                 }
  91                 static byte [] init_vector
  92                 {
  93                         get { return (byte []) AppDomain.CurrentDomain.GetData (Forms_init_vector); }
  94                         set { AppDomain.CurrentDomain.SetData (Forms_init_vector, value); }
  95                 }
  96                 static object locker = new object ();
  97 #else
  98                 static bool initialized;
  99                 static string cookieName;
 100                 static string cookiePath;
 101                 static int timeout;
 102                 static FormsProtectionEnum protection;
 103                 static object locker = new object ();
 104                 static byte [] init_vector; // initialization vector used for 3DES
 105 #endif
 106 #if NET_1_1
 107 #if TARGET_J2EE
 108                 const string Forms_requireSSL = "Forms.requireSSL";
 109                 const string Forms_slidingExpiration = "Forms.slidingExpiration";
 110
 111                 static bool requireSSL
 112                 {
 113                         get {
 114                                 object o = AppDomain.CurrentDomain.GetData (Forms_requireSSL);
 115                                 return o != null ? (bool) o : false;
 116                         }
 117                         set { AppDomain.CurrentDomain.SetData (Forms_requireSSL, value); }
 118                 }
 119                 static bool slidingExpiration
 120                 {
 121                         get {
 122                                 object o = AppDomain.CurrentDomain.GetData (Forms_slidingExpiration);
 123                                 return o != null ? (bool) o : false;
 124                         }
 125                         set { AppDomain.CurrentDomain.SetData (Forms_slidingExpiration, value); }
 126                 }
 127 #else
 128                 static bool requireSSL;
 129                 static bool slidingExpiration;
 130 #endif
 131 #endif
 132 #if NET_2_0
 133 #if TARGET_J2EE
 134                 const string Forms_cookie_domain = "Forms.cookie_domain";
 135                 const string Forms_cookie_mode = "Forms.cookie_mode";
 136                 const string Forms_cookies_supported = "Forms.cookies_supported";
 137                 const string Forms_default_url = "Forms.default_url";
 138                 const string Forms_enable_crossapp_redirects = "Forms.enable_crossapp_redirects";
 139                 const string Forms_login_url = "Forms.login_url";
 140                 static string cookie_domain
 141                 {
 142                         get { return (string) AppDomain.CurrentDomain.GetData (Forms_cookie_domain); }
 143                         set { AppDomain.CurrentDomain.SetData (Forms_cookie_domain, value); }
 144                 }
 145                 static HttpCookieMode cookie_mode
 146                 {
 147                         get { return (HttpCookieMode) AppDomain.CurrentDomain.GetData (Forms_cookie_mode); }
 148                         set { AppDomain.CurrentDomain.SetData (Forms_cookie_mode, value); }
 149                 }
 150                 static bool cookies_supported
 151                 {
 152                         get {
 153                                 object o = AppDomain.CurrentDomain.GetData (Forms_cookies_supported);
 154                                 return o != null ? (bool) o : false;
 155                         }
 156                         set { AppDomain.CurrentDomain.SetData (Forms_cookies_supported, value); }
 157                 }
 158                 static string default_url
 159                 {
 160                         get { return (string) AppDomain.CurrentDomain.GetData (Forms_default_url); }
 161                         set { AppDomain.CurrentDomain.SetData (Forms_default_url, value); }
 162                 }
 163                 static bool enable_crossapp_redirects
 164                 {
 165                         get {
 166                                 object o = AppDomain.CurrentDomain.GetData (Forms_enable_crossapp_redirects);
 167                                 return o != null ? (bool) o : false;
 168                         }
 169                         set { AppDomain.CurrentDomain.SetData (Forms_enable_crossapp_redirects, value); }
 170                 }
 171                 static string login_url
 172                 {
 173                         get { return (string) AppDomain.CurrentDomain.GetData (Forms_login_url); }
 174                         set { AppDomain.CurrentDomain.SetData (Forms_login_url, value); }
 175                 }
 176 #else
 177                 static string cookie_domain;
 178                 static HttpCookieMode cookie_mode;
 179                 static bool cookies_supported;
 180                 static string default_url;
 181                 static bool enable_crossapp_redirects;
 182                 static string login_url;
 183 #endif
 184 #endif
 185                 // same names and order used in xsp
 186                 static string [] indexFiles = { "index.aspx",
 187                                                 "Default.aspx",
 188                                                 "default.aspx",
 189                                                 "index.html",
 190                                                 "index.htm" };
 191
 192                 public FormsAuthentication ()
 193                 {
 194                 }
 195
 196                 public static bool Authenticate (string name, string password)
 197                 {
 198                         if (name == null || password == null)
 199                                 return false;
 200
 201                         Initialize ();
 202                         HttpContext context = HttpContext.Current;
 203                         if (context == null)
 204                                 throw new HttpException ("Context is null!");
 205
 206 #if NET_2_0
 207                         AuthenticationSection section = (AuthenticationSection) WebConfigurationManager.GetSection (authConfigPath);
 208                         FormsAuthenticationCredentials config = section.Forms.Credentials;
 209                         FormsAuthenticationUser user = config.Users[name];
 210                         string stored = null;
 211
 212                         if (user != null)
 213                                 stored = user.Password;
 214 #else
 215                         AuthConfig config = context.GetConfig (authConfigPath) as AuthConfig;
 216                         Hashtable users = config.CredentialUsers;
 217                         string stored = users [name] as string;
 218 #endif
 219                         if (stored == null)
 220                                 return false;
 221
 222                         switch (config.PasswordFormat) {
 223                         case FormsAuthPasswordFormat.Clear:
 224                                 /* Do nothing */
 225                                 break;
 226                         case FormsAuthPasswordFormat.MD5:
 227                                 password = HashPasswordForStoringInConfigFile (password, "MD5");
 228                                 break;
 229                         case FormsAuthPasswordFormat.SHA1:
 230                                 password = HashPasswordForStoringInConfigFile (password, "SHA1");
 231                                 break;
 232                         }
 233
 234                         return (password == stored);
 235                 }
 236
 237                 static FormsAuthenticationTicket Decrypt2 (byte [] bytes)
 238                 {
 239                         if (protection == FormsProtectionEnum.None)
 240                                 return FormsAuthenticationTicket.FromByteArray (bytes);
 241
 242 #if NET_2_0
 243                         MachineKeySection config = (MachineKeySection) WebConfigurationManager.GetSection (machineKeyConfigPath);
 244 #else
 245                         MachineKeyConfig config = HttpContext.GetAppConfig (machineKeyConfigPath) as MachineKeyConfig;
 246 #endif
 247                         bool all = (protection == FormsProtectionEnum.All);
 248
 249                         byte [] result = bytes;
 250                         if (all || protection == FormsProtectionEnum.Encryption) {
 251                                 ICryptoTransform decryptor;
 252                                 decryptor = TripleDES.Create ().CreateDecryptor (config.DecryptionKey192Bits, init_vector);
 253                                 result = decryptor.TransformFinalBlock (bytes, 0, bytes.Length);
 254                                 bytes = null;
 255                         }
 256
 257                         if (all || protection == FormsProtectionEnum.Validation) {
 258                                 int count;
 259                                 MachineKeyValidation validationType;
 260
 261 #if NET_2_0
 262                                 validationType = config.Validation;
 263 #else
 264                                 validationType = config.ValidationType;
 265 #endif
 266                                 if (validationType == MachineKeyValidation.MD5)
 267                                         count = MD5_hash_size;
 268                                 else
 269                                         count = SHA1_hash_size; // 3DES and SHA1
 270
 271 #if NET_2_0
 272                                 byte [] vk = config.ValidationKeyBytes;
 273 #else
 274                                 byte [] vk = config.ValidationKey;
 275 #endif
 276                                 byte [] mix = new byte [result.Length - count + vk.Length];
 277                                 Buffer.BlockCopy (result, 0, mix, 0, result.Length - count);
 278                                 Buffer.BlockCopy (vk, 0, mix, result.Length - count, vk.Length);
 279
 280                                 byte [] hash = null;
 281                                 switch (validationType) {
 282                                 case MachineKeyValidation.MD5:
 283                                         hash = MD5.Create ().ComputeHash (mix);
 284                                         break;
 285                                 // From MS docs: "When 3DES is specified, forms authentication defaults to SHA1"
 286                                 case MachineKeyValidation.TripleDES:
 287                                 case MachineKeyValidation.SHA1:
 288                                         hash = SHA1.Create ().ComputeHash (mix);
 289                                         break;
 290                                 }
 291
 292                                 if (result.Length < count)
 293                                         throw new ArgumentException ("Error validating ticket (length).", "encryptedTicket");
 294
 295                                 int i, k;
 296                                 for (i = result.Length - count, k = 0; k < count; i++, k++) {
 297                                         if (result [i] != hash [k])
 298                                                 throw new ArgumentException ("Error validating ticket.", "encryptedTicket");
 299                                 }
 300                         }
 301
 302                         return FormsAuthenticationTicket.FromByteArray (result);
 303                 }
 304
 305                 public static FormsAuthenticationTicket Decrypt (string encryptedTicket)
 306                 {
 307                         if (encryptedTicket == null || encryptedTicket == String.Empty)
 308                                 throw new ArgumentException ("Invalid encrypted ticket", "encryptedTicket");
 309
 310                         Initialize ();
 311
 312                         FormsAuthenticationTicket ticket;
 313 #if NET_2_0
 314                         byte [] bytes = MachineKeySection.GetBytes (encryptedTicket, encryptedTicket.Length);
 315 #else
 316                         byte [] bytes = MachineKeyConfig.GetBytes (encryptedTicket, encryptedTicket.Length);
 317 #endif
 318                         try {
 319                                 ticket = Decrypt2 (bytes);
 320                         } catch (Exception) {
 321                                 ticket = null;
 322                         }
 323
 324                         return ticket;
 325                 }
 326
 327                 public static string Encrypt (FormsAuthenticationTicket ticket)
 328                 {
 329                         if (ticket == null)
 330                                 throw new ArgumentNullException ("ticket");
 331
 332                         Initialize ();
 333                         byte [] ticket_bytes = ticket.ToByteArray ();
 334                         if (protection == FormsProtectionEnum.None)
 335                                 return GetHexString (ticket_bytes);
 336
 337                         byte [] result = ticket_bytes;
 338 #if NET_2_0
 339                         MachineKeySection config = (MachineKeySection) WebConfigurationManager.GetSection (machineKeyConfigPath);
 340 #else
 341                         MachineKeyConfig config = HttpContext.GetAppConfig (machineKeyConfigPath) as MachineKeyConfig;
 342 #endif
 343                         bool all = (protection == FormsProtectionEnum.All);
 344                         if (all || protection == FormsProtectionEnum.Validation) {
 345                                 byte [] valid_bytes = null;
 346 #if NET_2_0
 347                                 byte [] vk = config.ValidationKeyBytes;
 348 #else
 349                                 byte [] vk = config.ValidationKey;
 350 #endif
 351                                 byte [] mix = new byte [ticket_bytes.Length + vk.Length];
 352                                 Buffer.BlockCopy (ticket_bytes, 0, mix, 0, ticket_bytes.Length);
 353                                 Buffer.BlockCopy (vk, 0, mix, result.Length, vk.Length);
 354
 355                                 switch (
 356 #if NET_2_0
 357                                         config.Validation
 358 #else
 359                                         config.ValidationType
 360 #endif
 361                                         ) {
 362                                 case MachineKeyValidation.MD5:
 363                                         valid_bytes = MD5.Create ().ComputeHash (mix);
 364                                         break;
 365                                 // From MS docs: "When 3DES is specified, forms authentication defaults to SHA1"
 366                                 case MachineKeyValidation.TripleDES:
 367                                 case MachineKeyValidation.SHA1:
 368                                         valid_bytes = SHA1.Create ().ComputeHash (mix);
 369                                         break;
 370                                 }
 371
 372                                 int tlen = ticket_bytes.Length;
 373                                 int vlen = valid_bytes.Length;
 374                                 result = new byte [tlen + vlen];
 375                                 Buffer.BlockCopy (ticket_bytes, 0, result, 0, tlen);
 376                                 Buffer.BlockCopy (valid_bytes, 0, result, tlen, vlen);
 377                         }
 378
 379                         if (all || protection == FormsProtectionEnum.Encryption) {
 380                                 ICryptoTransform encryptor;
 381                                 encryptor = TripleDES.Create ().CreateEncryptor (config.DecryptionKey192Bits, init_vector);
 382                                 result = encryptor.TransformFinalBlock (result, 0, result.Length);
 383                         }
 384
 385                         return GetHexString (result);
 386                 }
 387
 388                 public static HttpCookie GetAuthCookie (string userName, bool createPersistentCookie)
 389                 {
 390                         return GetAuthCookie (userName, createPersistentCookie, null);
 391                 }
 392
 393                 public static HttpCookie GetAuthCookie (string userName, bool createPersistentCookie, string strCookiePath)
 394                 {
 395                         Initialize ();
 396
 397                         if (userName == null)
 398                                 userName = String.Empty;
 399
 400                         if (strCookiePath == null || strCookiePath.Length == 0)
 401                                 strCookiePath = cookiePath;
 402
 403                         DateTime now = DateTime.Now;
 404                         DateTime then;
 405                         if (createPersistentCookie)
 406                                 then = now.AddYears (50);
 407                         else
 408                                 then = now.AddMinutes (timeout);
 409
 410                         FormsAuthenticationTicket ticket = new FormsAuthenticationTicket (1,
 411                                                                                           userName,
 412                                                                                           now,
 413                                                                                           then,
 414                                                                                           createPersistentCookie,
 415                                                                                           String.Empty,
 416                                                                                           cookiePath);
 417
 418                         if (!createPersistentCookie)
 419                                 then = DateTime.MinValue;
 420
 421                         HttpCookie cookie = new HttpCookie (cookieName, Encrypt (ticket), strCookiePath, then);
 422                         if (requireSSL)
 423                                 cookie.Secure = true;
 424                         return cookie;
 425                 }
 426
 427                 internal static string ReturnUrl
 428                 {
 429                         get { return HttpContext.Current.Request ["RETURNURL"]; }
 430                 }
 431
 432                 public static string GetRedirectUrl (string userName, bool createPersistentCookie)
 433                 {
 434                         if (userName == null)
 435                                 return null;
 436
 437                         Initialize ();
 438                         HttpRequest request = HttpContext.Current.Request;
 439                         string returnUrl = ReturnUrl;
 440                         if (returnUrl != null)
 441                                 return returnUrl;
 442
 443                         returnUrl = request.ApplicationPath;
 444                         string apppath = request.PhysicalApplicationPath;
 445                         bool found = false;
 446
 447                         foreach (string indexFile in indexFiles) {
 448                                 string filePath = Path.Combine (apppath, indexFile);
 449                                 if (File.Exists (filePath)) {
 450                                         returnUrl = UrlUtils.Combine (returnUrl, indexFile);
 451                                         found = true;
 452                                         break;
 453                                 }
 454                         }
 455
 456                         if (!found)
 457                                 returnUrl = UrlUtils.Combine (returnUrl, "index.aspx");
 458
 459                         return returnUrl;
 460                 }
 461
 462                 static string GetHexString (byte [] bytes)
 463                 {
 464                         StringBuilder result = new StringBuilder (bytes.Length * 2);
 465                         foreach (byte b in bytes)
 466                                 result.AppendFormat ("{0:X2}", (int) b);
 467
 468                         return result.ToString ();
 469                 }
 470
 471                 public static string HashPasswordForStoringInConfigFile (string password, string passwordFormat)
 472                 {
 473                         if (password == null)
 474                                 throw new ArgumentNullException ("password");
 475
 476                         if (passwordFormat == null)
 477                                 throw new ArgumentNullException ("passwordFormat");
 478
 479                         byte [] bytes;
 480                         if (String.Compare (passwordFormat, "MD5", true, CultureInfo.InvariantCulture) == 0) {
 481                                 bytes = MD5.Create ().ComputeHash (Encoding.UTF8.GetBytes (password));
 482                         } else if (String.Compare (passwordFormat, "SHA1", true, CultureInfo.InvariantCulture) == 0) {
 483                                 bytes = SHA1.Create ().ComputeHash (Encoding.UTF8.GetBytes (password));
 484                         } else {
 485                                 throw new ArgumentException ("The format must be either MD5 or SHA1", "passwordFormat");
 486                         }
 487
 488                         return GetHexString (bytes);
 489                 }
 490
 491                 public static void Initialize ()
 492                 {
 493                         if (initialized)
 494                                 return;
 495
 496                         lock (locker) {
 497                                 if (initialized)
 498                                         return;
 499
 500 #if NET_2_0
 501                                 AuthenticationSection section = (AuthenticationSection)WebConfigurationManager.GetSection (authConfigPath);
 502                                 FormsAuthenticationConfiguration config = section.Forms;
 503
 504                                 cookieName = config.Name;
 505                                 timeout = (int)config.Timeout.TotalMinutes;
 506                                 cookiePath = config.Path;
 507                                 protection = config.Protection;
 508                                 requireSSL = config.RequireSSL;
 509                                 slidingExpiration = config.SlidingExpiration;
 510                                 cookie_domain = config.Domain;
 511                                 cookie_mode = config.Cookieless;
 512                                 cookies_supported = true; /* XXX ? */
 513                                 default_url = MapUrl(config.DefaultUrl);
 514                                 enable_crossapp_redirects = config.EnableCrossAppRedirects;
 515                                 login_url = MapUrl(config.LoginUrl);
 516 #else
 517                                 HttpContext context = HttpContext.Current;
 518                                 AuthConfig authConfig = context.GetConfig (authConfigPath) as AuthConfig;
 519                                 if (authConfig != null) {
 520                                         cookieName = authConfig.CookieName;
 521                                         timeout = authConfig.Timeout;
 522                                         cookiePath = authConfig.CookiePath;
 523                                         protection = authConfig.Protection;
 524 #if NET_1_1
 525                                         requireSSL = authConfig.RequireSSL;
 526                                         slidingExpiration = authConfig.SlidingExpiration;
 527 #endif
 528                                 } else {
 529                                         cookieName = ".MONOAUTH";
 530                                         timeout = 30;
 531                                         cookiePath = "/";
 532                                         protection = FormsProtectionEnum.All;
 533 #if NET_1_1
 534                                         slidingExpiration = true;
 535 #endif
 536                                 }
 537 #endif
 538
 539                                 // IV is 8 bytes long for 3DES
 540                                 init_vector = new byte [8];
 541                                 int len = cookieName.Length;
 542                                 for (int i = 0; i < 8; i++) {
 543                                         if (i >= len)
 544                                                 break;
 545
 546                                         init_vector [i] = (byte) cookieName [i];
 547                                 }
 548
 549                                 initialized = true;
 550                         }
 551                 }
 552
 553 #if NET_2_0
 554                 static string MapUrl (string url) {
 555                         if (UrlUtils.IsRelativeUrl (url))
 556                                 return UrlUtils.Combine (HttpRuntime.AppDomainAppVirtualPath, url);
 557                         else
 558                                 return UrlUtils.ResolveVirtualPathFromAppAbsolute (url);
 559                 }
 560 #endif
 561
 562                 public static void RedirectFromLoginPage (string userName, bool createPersistentCookie)
 563                 {
 564                         RedirectFromLoginPage (userName, createPersistentCookie, null);
 565                 }
 566
 567                 public static void RedirectFromLoginPage (string userName, bool createPersistentCookie, string strCookiePath)
 568                 {
 569                         if (userName == null)
 570                                 return;
 571
 572                         Initialize ();
 573                         SetAuthCookie (userName, createPersistentCookie, strCookiePath);
 574                         Redirect (GetRedirectUrl (userName, createPersistentCookie), false);
 575                 }
 576
 577                 public static FormsAuthenticationTicket RenewTicketIfOld (FormsAuthenticationTicket tOld)
 578                 {
 579                         if (tOld == null)
 580                                 return null;
 581
 582                         DateTime now = DateTime.Now;
 583                         TimeSpan toIssue = now - tOld.IssueDate;
 584                         TimeSpan toExpiration = tOld.Expiration - now;
 585                         if (toExpiration > toIssue)
 586                                 return tOld;
 587
 588                         FormsAuthenticationTicket tNew = tOld.Clone ();
 589                         tNew.SetDates (now, now + (tOld.Expiration - tOld.IssueDate));
 590                         return tNew;
 591                 }
 592
 593                 public static void SetAuthCookie (string userName, bool createPersistentCookie)
 594                 {
 595                         Initialize ();
 596                         SetAuthCookie (userName, createPersistentCookie, cookiePath);
 597                 }
 598
 599                 public static void SetAuthCookie (string userName, bool createPersistentCookie, string strCookiePath)
 600                 {
 601                         HttpContext context = HttpContext.Current;
 602                         if (context == null)
 603                                 throw new HttpException ("Context is null!");
 604
 605                         HttpResponse response = context.Response;
 606                         if (response == null)
 607                                 throw new HttpException ("Response is null!");
 608
 609                         response.Cookies.Add (GetAuthCookie (userName, createPersistentCookie, strCookiePath));
 610                 }
 611
 612                 public static void SignOut ()
 613                 {
 614                         Initialize ();
 615
 616                         HttpContext context = HttpContext.Current;
 617                         if (context == null)
 618                                 throw new HttpException ("Context is null!");
 619
 620                         HttpResponse response = context.Response;
 621                         if (response == null)
 622                                 throw new HttpException ("Response is null!");
 623
 624                         HttpCookieCollection cc = response.Cookies;
 625                         cc.Remove (cookieName);
 626                         HttpCookie expiration_cookie = new HttpCookie (cookieName, "");
 627                         expiration_cookie.Expires = new DateTime (1999, 10, 12);
 628                         expiration_cookie.Path = cookiePath;
 629                         cc.Add (expiration_cookie);
 630
 631 #if NET_2_0
 632                         Roles.DeleteCookie ();
 633 #endif
 634                 }
 635
 636                 public static string FormsCookieName
 637                 {
 638                         get {
 639                                 Initialize ();
 640                                 return cookieName;
 641                         }
 642                 }
 643
 644                 public static string FormsCookiePath
 645                 {
 646                         get {
 647                                 Initialize ();
 648                                 return cookiePath;
 649                         }
 650                 }
 651 #if NET_1_1
 652                 public static bool RequireSSL {
 653                         get {
 654                                 Initialize ();
 655                                 return requireSSL;
 656                         }
 657                 }
 658
 659                 public static bool SlidingExpiration {
 660                         get {
 661                                 Initialize ();
 662                                 return slidingExpiration;
 663                         }
 664                 }
 665 #endif
 666
 667 #if NET_2_0
 668                 public static string CookieDomain {
 669                         get { Initialize (); return cookie_domain; }
 670                 }
 671
 672                 public static HttpCookieMode CookieMode {
 673                         get { Initialize (); return cookie_mode; }
 674                 }
 675
 676                 public static bool CookiesSupported {
 677                         get { Initialize (); return cookies_supported; }
 678                 }
 679
 680                 public static string DefaultUrl {
 681                         get { Initialize (); return default_url; }
 682                 }
 683
 684                 public static bool EnableCrossAppRedirects {
 685                         get { Initialize (); return enable_crossapp_redirects; }
 686                 }
 687
 688                 public static string LoginUrl {
 689                         get { Initialize (); return login_url; }
 690                 }
 691
 692                 public static void RedirectToLoginPage ()
 693                 {
 694                         Redirect (LoginUrl);
 695                 }
 696
 697                 [MonoTODO ("needs more tests")]
 698                 public static void RedirectToLoginPage (string extraQueryString)
 699                 {
 700                         // TODO: if ? is in LoginUrl (legal?), ? in query (legal?) ...
 701                         Redirect (LoginUrl + "?" + extraQueryString);
 702                 }
 703
 704                 private static void Redirect (string url)
 705                 {
 706                         HttpContext.Current.Response.Redirect (url);
 707                 }
 708 #endif
 709
 710                 private static void Redirect (string url, bool end)
 711                 {
 712                         HttpContext.Current.Response.Redirect (url, end);
 713                 }
 714         }
 715 }