Code:
/ DotNET / DotNET / 8.0 / untmp / whidbey / REDBITS / ndp / fx / src / xsp / System / Web / Configuration / AuthorizationRuleCollection.cs / 2 / AuthorizationRuleCollection.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- namespace System.Web.Configuration { using System; using System.Xml; using System.Configuration; using System.Collections.Specialized; using System.Collections; using System.Globalization; using System.IO; using System.Text; using System.Security.Principal; using System.Web.Util; using System.ComponentModel; using System.Security.Permissions; [ConfigurationCollection(typeof(AuthorizationRule), AddItemName = "allow,deny", CollectionType = ConfigurationElementCollectionType.BasicMapAlternate)] [AspNetHostingPermission(SecurityAction.LinkDemand, Level=AspNetHostingPermissionLevel.Minimal)] public sealed class AuthorizationRuleCollection : ConfigurationElementCollection { private static ConfigurationPropertyCollection _properties; static AuthorizationRuleCollection() { _properties = new ConfigurationPropertyCollection(); } public AuthorizationRuleCollection() { } protected override ConfigurationPropertyCollection Properties { get { return _properties; } } // public properties public AuthorizationRule this[int index] { get { return (AuthorizationRule)BaseGet(index); } set { if (BaseGet(index) != null) { BaseRemoveAt(index); } BaseAdd(index, value); } } // Protected Overrides protected override ConfigurationElement CreateNewElement() { return new AuthorizationRule(); } protected override ConfigurationElement CreateNewElement(string elementName) { AuthorizationRule newElement = new AuthorizationRule(); switch (elementName.ToLower(CultureInfo.InvariantCulture)) { case "allow": newElement.Action = AuthorizationRuleAction.Allow; break; case "deny": newElement.Action = AuthorizationRuleAction.Deny; break; } return newElement; } protected override Object GetElementKey(ConfigurationElement element) { AuthorizationRule rule = (AuthorizationRule)element; return rule._ActionString; } protected override string ElementName { get { return String.Empty; //_LookUpInElement_ } } public override ConfigurationElementCollectionType CollectionType { get { return ConfigurationElementCollectionType.BasicMapAlternate; } } // IsElement name allows collection with multiple element names to // exist with the base class architecture. Given an element name // it simply returns true if the name is legal for the default collection // or false otherwise. protected override bool IsElementName(string elementname) { bool IsElement = false; switch (elementname.ToLower(CultureInfo.InvariantCulture)) { case "allow": case "deny": IsElement = true; break; } return IsElement; } internal bool IsUserAllowed(IPrincipal user, String verb) { if (user == null) { return false; } if (!_fCheckForCommonCasesDone) { DoCheckForCommonCases(); _fCheckForCommonCasesDone = true; } if (!user.Identity.IsAuthenticated && _iAnonymousAllowed != 0) return (_iAnonymousAllowed > 0); if (_iAllUsersAllowed != 0) return (_iAllUsersAllowed > 0); // Go down the list permissions and check each one foreach (AuthorizationRule rule in this) { int result = rule.IsUserAllowed(user, verb); if (result != 0) return (result > 0); } return false; } private void DoCheckForCommonCases() { bool fStillLookingForAnonymous = true; bool fAnyAllowRulesFound = false; bool fAnyDenyRulesFound = false; foreach (AuthorizationRule rule in this) { if (rule.Everyone) // Found a rule for Every-user { if (!fAnyAllowRulesFound && rule.Action == AuthorizationRuleAction.Deny) _iAllUsersAllowed = -1; if (!fAnyDenyRulesFound && rule.Action == AuthorizationRuleAction.Allow) _iAllUsersAllowed = 1; return; // done! } if (fStillLookingForAnonymous && rule.IncludesAnonymous) // Found a rule for anonymous-user { if (!fAnyAllowRulesFound && rule.Action == AuthorizationRuleAction.Deny) _iAnonymousAllowed = -1; if (!fAnyDenyRulesFound && rule.Action == AuthorizationRuleAction.Allow) _iAnonymousAllowed = 1; fStillLookingForAnonymous = false; } if (!fAnyAllowRulesFound && rule.Action == AuthorizationRuleAction.Allow) fAnyAllowRulesFound = true; if (!fAnyDenyRulesFound && rule.Action == AuthorizationRuleAction.Deny) fAnyDenyRulesFound = true; if (!fStillLookingForAnonymous && fAnyAllowRulesFound && fAnyDenyRulesFound) return; } } // public methods public void Add(AuthorizationRule rule) { BaseAdd(-1, rule); // add to the end of the list and dont overwrite dups! } public void Clear() { BaseClear(); } public AuthorizationRule Get(int index) { return (AuthorizationRule)BaseGet(index); } public void RemoveAt(int index) { BaseRemoveAt(index); } public void Set(int index, AuthorizationRule rule) { BaseAdd(index, rule); } public int IndexOf(AuthorizationRule rule) { for (int x = 0; x < Count; x++) { if (Object.Equals(Get(x), rule)) { return x; } } return -1; } public void Remove(AuthorizationRule rule) { int index = IndexOf(rule); if (index >= 0) { BaseRemoveAt(index); } } private int _iAllUsersAllowed = 0; private int _iAnonymousAllowed = 0; private bool _fCheckForCommonCasesDone = false; } }
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