Code:
/ Dotnetfx_Vista_SP2 / Dotnetfx_Vista_SP2 / 8.0.50727.4016 / DEVDIV / depot / DevDiv / releases / whidbey / NetFxQFE / ndp / fx / src / Configuration / System / Configuration / TypeUtil.cs / 1 / TypeUtil.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- using System; using System.Configuration.Internal; using System.Reflection; using System.Security; using System.Security.Permissions; namespace System.Configuration { internal static class TypeUtil { // // Since the config APIs were originally implemented in System.dll, // references to types without assembly names could be resolved to // System.dll in Everett. Emulate that behavior by trying to get the // type from System.dll // static private Type GetLegacyType(string typeString) { Type type = null; // // Ignore all exceptions, otherwise callers will get unexpected // exceptions not related to the original failure to load the // desired type. // try { Assembly systemAssembly = typeof(ConfigurationException).Assembly; type = systemAssembly.GetType(typeString, false); } catch { } return type; } // // Get the type specified by typeString. If it fails, try to retrieve it // as a type from System.dll. If that fails, return null or throw the original // exception as indicated by throwOnError. // static private Type GetTypeImpl(string typeString, bool throwOnError) { Type type = null; Exception originalException = null; try { type = Type.GetType(typeString, throwOnError); } catch (Exception e) { originalException = e; } if (type == null) { type = GetLegacyType(typeString); if (type == null && originalException != null) { throw originalException; } } return type; } // // Ask the host to get the type specified by typeString. If it fails, try to retrieve it // as a type from System.dll. If that fails, return null or throw the original // exception as indicated by throwOnError. // [ReflectionPermission(SecurityAction.Assert, Flags=ReflectionPermissionFlag.TypeInformation)] static internal Type GetTypeWithReflectionPermission(IInternalConfigHost host, string typeString, bool throwOnError) { Type type = null; Exception originalException = null; try { type = host.GetConfigType(typeString, throwOnError); } catch (Exception e) { originalException = e; } if (type == null) { type = GetLegacyType(typeString); if (type == null && originalException != null) { throw originalException; } } return type; } [ReflectionPermission(SecurityAction.Assert, Flags=ReflectionPermissionFlag.TypeInformation)] static internal Type GetTypeWithReflectionPermission(string typeString, bool throwOnError) { return GetTypeImpl(typeString, throwOnError); } [ReflectionPermission(SecurityAction.Assert, Flags=ReflectionPermissionFlag.TypeInformation | ReflectionPermissionFlag.MemberAccess)] static internal object CreateInstanceWithReflectionPermission(string typeString) { Type type = GetTypeImpl(typeString, true); // catch the errors and report them object result = Activator.CreateInstance(type, true); // create non-public types return result; } [ReflectionPermission(SecurityAction.Assert, Flags=ReflectionPermissionFlag.TypeInformation | ReflectionPermissionFlag.MemberAccess)] static internal object CreateInstanceWithReflectionPermission(Type type) { object result = Activator.CreateInstance(type, true); // create non-public types return result; } [ReflectionPermission(SecurityAction.Assert, Flags=ReflectionPermissionFlag.TypeInformation)] static internal ConstructorInfo GetConstructorWithReflectionPermission(Type type, Type baseType, bool throwOnError) { type = VerifyAssignableType(baseType, type, throwOnError); if (type == null) { return null; } BindingFlags bindingFlags = BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic; ConstructorInfo ctor = type.GetConstructor(bindingFlags, null, CallingConventions.HasThis, Type.EmptyTypes, null); if (ctor == null && throwOnError) { throw new TypeLoadException(SR.GetString(SR.TypeNotPublic, type.AssemblyQualifiedName)); } return ctor; } [ReflectionPermission(SecurityAction.Assert, Flags=ReflectionPermissionFlag.TypeInformation | ReflectionPermissionFlag.MemberAccess)] static internal object InvokeCtorWithReflectionPermission(ConstructorInfo ctor) { return ctor.Invoke(null); } static internal bool IsTypeFromTrustedAssemblyWithoutAptca(Type type) { Assembly assembly = type.Assembly; return assembly.GlobalAssemblyCache && !HasAptcaBit(assembly); } static internal Type VerifyAssignableType(Type baseType, Type type, bool throwOnError) { if (baseType.IsAssignableFrom(type)) { return type; } if (throwOnError) { throw new TypeLoadException( SR.GetString(SR.Config_type_doesnt_inherit_from_type, type.FullName, baseType.FullName)); } return null; } [ReflectionPermission(SecurityAction.Assert, Flags=ReflectionPermissionFlag.TypeInformation | ReflectionPermissionFlag.MemberAccess)] private static bool HasAptcaBit(Assembly assembly) { Object[] attrs = assembly.GetCustomAttributes( typeof(System.Security.AllowPartiallyTrustedCallersAttribute), /*inherit*/ false); return (attrs != null && attrs.Length > 0); } static private PermissionSet s_fullTrustPermissionSet; // Check if the caller is fully trusted static internal bool IsCallerFullTrust { get { bool isFullTrust = false; try { if (s_fullTrustPermissionSet == null) { s_fullTrustPermissionSet = new PermissionSet(PermissionState.Unrestricted); } s_fullTrustPermissionSet.Demand(); isFullTrust = true; } catch { } return isFullTrust; } } // Check if the type is allowed to be used in config by checking the APTCA bit internal static bool IsTypeAllowedInConfig(Type t) { // Note: // This code is copied from HttpRuntime.IsTypeAllowedInConfig, but modified in // how it checks for fulltrust this can be called from non-ASP.NET apps. // Allow everything in full trust if (IsCallerFullTrust) { return true; } // The APTCA bit is only relevant for assemblies living in the GAC, since the rest runs // under partial trust (VSWhidbey 422183) Assembly assembly = t.Assembly; if (!assembly.GlobalAssemblyCache) return true; // If it has the APTCA bit, allow it if (HasAptcaBit(assembly)) return true; // It's a GAC type without APTCA in partial trust scenario: block it return false; } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. //------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- using System; using System.Configuration.Internal; using System.Reflection; using System.Security; using System.Security.Permissions; namespace System.Configuration { internal static class TypeUtil { // // Since the config APIs were originally implemented in System.dll, // references to types without assembly names could be resolved to // System.dll in Everett. Emulate that behavior by trying to get the // type from System.dll // static private Type GetLegacyType(string typeString) { Type type = null; // // Ignore all exceptions, otherwise callers will get unexpected // exceptions not related to the original failure to load the // desired type. // try { Assembly systemAssembly = typeof(ConfigurationException).Assembly; type = systemAssembly.GetType(typeString, false); } catch { } return type; } // // Get the type specified by typeString. If it fails, try to retrieve it // as a type from System.dll. If that fails, return null or throw the original // exception as indicated by throwOnError. // static private Type GetTypeImpl(string typeString, bool throwOnError) { Type type = null; Exception originalException = null; try { type = Type.GetType(typeString, throwOnError); } catch (Exception e) { originalException = e; } if (type == null) { type = GetLegacyType(typeString); if (type == null && originalException != null) { throw originalException; } } return type; } // // Ask the host to get the type specified by typeString. If it fails, try to retrieve it // as a type from System.dll. If that fails, return null or throw the original // exception as indicated by throwOnError. // [ReflectionPermission(SecurityAction.Assert, Flags=ReflectionPermissionFlag.TypeInformation)] static internal Type GetTypeWithReflectionPermission(IInternalConfigHost host, string typeString, bool throwOnError) { Type type = null; Exception originalException = null; try { type = host.GetConfigType(typeString, throwOnError); } catch (Exception e) { originalException = e; } if (type == null) { type = GetLegacyType(typeString); if (type == null && originalException != null) { throw originalException; } } return type; } [ReflectionPermission(SecurityAction.Assert, Flags=ReflectionPermissionFlag.TypeInformation)] static internal Type GetTypeWithReflectionPermission(string typeString, bool throwOnError) { return GetTypeImpl(typeString, throwOnError); } [ReflectionPermission(SecurityAction.Assert, Flags=ReflectionPermissionFlag.TypeInformation | ReflectionPermissionFlag.MemberAccess)] static internal object CreateInstanceWithReflectionPermission(string typeString) { Type type = GetTypeImpl(typeString, true); // catch the errors and report them object result = Activator.CreateInstance(type, true); // create non-public types return result; } [ReflectionPermission(SecurityAction.Assert, Flags=ReflectionPermissionFlag.TypeInformation | ReflectionPermissionFlag.MemberAccess)] static internal object CreateInstanceWithReflectionPermission(Type type) { object result = Activator.CreateInstance(type, true); // create non-public types return result; } [ReflectionPermission(SecurityAction.Assert, Flags=ReflectionPermissionFlag.TypeInformation)] static internal ConstructorInfo GetConstructorWithReflectionPermission(Type type, Type baseType, bool throwOnError) { type = VerifyAssignableType(baseType, type, throwOnError); if (type == null) { return null; } BindingFlags bindingFlags = BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic; ConstructorInfo ctor = type.GetConstructor(bindingFlags, null, CallingConventions.HasThis, Type.EmptyTypes, null); if (ctor == null && throwOnError) { throw new TypeLoadException(SR.GetString(SR.TypeNotPublic, type.AssemblyQualifiedName)); } return ctor; } [ReflectionPermission(SecurityAction.Assert, Flags=ReflectionPermissionFlag.TypeInformation | ReflectionPermissionFlag.MemberAccess)] static internal object InvokeCtorWithReflectionPermission(ConstructorInfo ctor) { return ctor.Invoke(null); } static internal bool IsTypeFromTrustedAssemblyWithoutAptca(Type type) { Assembly assembly = type.Assembly; return assembly.GlobalAssemblyCache && !HasAptcaBit(assembly); } static internal Type VerifyAssignableType(Type baseType, Type type, bool throwOnError) { if (baseType.IsAssignableFrom(type)) { return type; } if (throwOnError) { throw new TypeLoadException( SR.GetString(SR.Config_type_doesnt_inherit_from_type, type.FullName, baseType.FullName)); } return null; } [ReflectionPermission(SecurityAction.Assert, Flags=ReflectionPermissionFlag.TypeInformation | ReflectionPermissionFlag.MemberAccess)] private static bool HasAptcaBit(Assembly assembly) { Object[] attrs = assembly.GetCustomAttributes( typeof(System.Security.AllowPartiallyTrustedCallersAttribute), /*inherit*/ false); return (attrs != null && attrs.Length > 0); } static private PermissionSet s_fullTrustPermissionSet; // Check if the caller is fully trusted static internal bool IsCallerFullTrust { get { bool isFullTrust = false; try { if (s_fullTrustPermissionSet == null) { s_fullTrustPermissionSet = new PermissionSet(PermissionState.Unrestricted); } s_fullTrustPermissionSet.Demand(); isFullTrust = true; } catch { } return isFullTrust; } } // Check if the type is allowed to be used in config by checking the APTCA bit internal static bool IsTypeAllowedInConfig(Type t) { // Note: // This code is copied from HttpRuntime.IsTypeAllowedInConfig, but modified in // how it checks for fulltrust this can be called from non-ASP.NET apps. // Allow everything in full trust if (IsCallerFullTrust) { return true; } // The APTCA bit is only relevant for assemblies living in the GAC, since the rest runs // under partial trust (VSWhidbey 422183) Assembly assembly = t.Assembly; if (!assembly.GlobalAssemblyCache) return true; // If it has the APTCA bit, allow it if (HasAptcaBit(assembly)) return true; // It's a GAC type without APTCA in partial trust scenario: block it return false; } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007.
Link Menu
This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- DEREncoding.cs
- BuildDependencySet.cs
- XmlNullResolver.cs
- Keywords.cs
- DefaultValidator.cs
- ElementAction.cs
- DataGridItemCollection.cs
- UrlMappingsSection.cs
- ContentPropertyAttribute.cs
- RequestTimeoutManager.cs
- GenericRootAutomationPeer.cs
- NegationPusher.cs
- Message.cs
- XhtmlBasicTextBoxAdapter.cs
- DetailsViewCommandEventArgs.cs
- NativeMethods.cs
- StickyNoteContentControl.cs
- QilFactory.cs
- DeclarativeExpressionConditionDeclaration.cs
- DataGridCaption.cs
- ReachFixedPageSerializerAsync.cs
- DockPatternIdentifiers.cs
- TextBoxAutomationPeer.cs
- RuntimeEnvironment.cs
- DataGridViewSelectedColumnCollection.cs
- MDIClient.cs
- OpenTypeCommon.cs
- HashHelper.cs
- DateTimeStorage.cs
- CellIdBoolean.cs
- Control.cs
- XmlSchemaInferenceException.cs
- PLINQETWProvider.cs
- NativeMethods.cs
- ListArgumentProvider.cs
- RestHandler.cs
- WebPartZoneBase.cs
- DependencyPropertyConverter.cs
- FlowchartDesigner.xaml.cs
- BamlResourceSerializer.cs
- ExtentKey.cs
- CodeFieldReferenceExpression.cs
- ZipFileInfo.cs
- XmlWriterTraceListener.cs
- wmiutil.cs
- AdapterDictionary.cs
- CommandID.cs
- XmlAttribute.cs
- HeaderedContentControl.cs
- StorageEntityTypeMapping.cs
- ContextInformation.cs
- GlyphRun.cs
- TextEditorTyping.cs
- ConfigurationSection.cs
- updatecommandorderer.cs
- DataObjectFieldAttribute.cs
- BinaryParser.cs
- IPAddress.cs
- DataGridViewCheckBoxColumn.cs
- HyperLinkField.cs
- RowUpdatingEventArgs.cs
- DocumentXmlWriter.cs
- FamilyMap.cs
- OleDbMetaDataFactory.cs
- MD5CryptoServiceProvider.cs
- FixedElement.cs
- AnonymousIdentificationSection.cs
- DataRowChangeEvent.cs
- ServiceModelSecurityTokenTypes.cs
- SchemaImporter.cs
- EntityConnectionStringBuilderItem.cs
- shaperfactory.cs
- UpdatePanelTriggerCollection.cs
- ReadOnlyCollection.cs
- TextElementEnumerator.cs
- ColumnHeaderConverter.cs
- RequestCacheEntry.cs
- WebPartConnectionsCancelVerb.cs
- BindingList.cs
- TreeBuilder.cs
- BCLDebug.cs
- InlineCollection.cs
- ValidationHelper.cs
- SelectingProviderEventArgs.cs
- DataGridViewColumnConverter.cs
- WindowsGraphics2.cs
- CounterCreationData.cs
- LifetimeMonitor.cs
- ForeignConstraint.cs
- RepeatButtonAutomationPeer.cs
- TriggerAction.cs
- TemplateControl.cs
- TcpClientSocketManager.cs
- CodeAccessPermission.cs
- UiaCoreApi.cs
- SerializationAttributes.cs
- X509ThumbprintKeyIdentifierClause.cs
- UpdateProgress.cs
- Utils.cs
- Label.cs