Code:
/ DotNET / DotNET / 8.0 / untmp / whidbey / REDBITS / ndp / clr / src / BCL / System / Security / CodeAccessPermission.cs / 1 / CodeAccessPermission.cs
// ==++== // // Copyright (c) Microsoft Corporation. All rights reserved. // // ==--== namespace System.Security { using System.IO; using System.Threading; using System.Security; using System.Security.Util; using System.Security.Permissions; using System.Collections; using System.Text; using System; using IUnrestrictedPermission = System.Security.Permissions.IUnrestrictedPermission; [Serializable, SecurityPermissionAttribute( SecurityAction.InheritanceDemand, ControlEvidence = true, ControlPolicy = true )] [System.Runtime.InteropServices.ComVisible(true)] abstract public class CodeAccessPermission : IPermission, ISecurityEncodable, IStackWalk { // Static methods for manipulation of stack public static void RevertAssert() { StackCrawlMark stackMark = StackCrawlMark.LookForMyCaller; SecurityRuntime.RevertAssert(ref stackMark); } public static void RevertDeny() { StackCrawlMark stackMark = StackCrawlMark.LookForMyCaller; SecurityRuntime.RevertDeny(ref stackMark); } public static void RevertPermitOnly() { StackCrawlMark stackMark = StackCrawlMark.LookForMyCaller; SecurityRuntime.RevertPermitOnly(ref stackMark); } public static void RevertAll() { StackCrawlMark stackMark = StackCrawlMark.LookForMyCaller; SecurityRuntime.RevertAll(ref stackMark); } // // Standard implementation of IPermission methods for // code-access permissions. // // Mark this method as requiring a security object on the caller's frame // so the caller won't be inlined (which would mess up stack crawling). [DynamicSecurityMethodAttribute()] public void Demand() { if (!this.CheckDemand( null )) { StackCrawlMark stackMark = StackCrawlMark.LookForMyCallersCaller; CodeAccessSecurityEngine.Check(this, ref stackMark); } } [DynamicSecurityMethodAttribute()] internal static void DemandInternal(PermissionType permissionType) { StackCrawlMark stackMark = StackCrawlMark.LookForMyCallersCaller; CodeAccessSecurityEngine.SpecialDemand(permissionType, ref stackMark); } // Metadata for this method should be flaged with REQ_SQ so that // EE can allocate space on the stack frame for FrameSecurityDescriptor [DynamicSecurityMethodAttribute()] public void Assert() { StackCrawlMark stackMark = StackCrawlMark.LookForMyCaller; CodeAccessSecurityEngine.Assert(this, ref stackMark); } [DynamicSecurityMethodAttribute()] static internal void AssertAllPossible() { StackCrawlMark stackMark = StackCrawlMark.LookForMyCaller; SecurityRuntime.AssertAllPossible(ref stackMark); } // Metadata for this method should be flaged with REQ_SQ so that // EE can allocate space on the stack frame for FrameSecurityDescriptor [DynamicSecurityMethodAttribute()] public void Deny() { StackCrawlMark stackMark = StackCrawlMark.LookForMyCaller; CodeAccessSecurityEngine.Deny(this, ref stackMark); } // Metadata for this method should be flaged with REQ_SQ so that // EE can allocate space on the stack frame for FrameSecurityDescriptor [DynamicSecurityMethodAttribute()] public void PermitOnly() { StackCrawlMark stackMark = StackCrawlMark.LookForMyCaller; CodeAccessSecurityEngine.PermitOnly(this, ref stackMark); } // IPermission interfaces // We provide a default implementation of Union here. // Any permission that doesn't provide its own representation // of Union will get this one and trigger CompoundPermission // We can take care of simple cases here... public virtual IPermission Union(IPermission other) { // The other guy could be null if (other == null) return(this.Copy()); // otherwise we don't support it. throw new NotSupportedException(Environment.GetResourceString( "NotSupported_SecurityPermissionUnion" )); } static internal SecurityElement CreatePermissionElement( IPermission perm, String permname ) { SecurityElement root = new SecurityElement( "IPermission" ); XMLUtil.AddClassAttribute( root, perm.GetType(), permname ); // If you hit this assert then most likely you are trying to change the name of this class. // This is ok as long as you change the hard coded string above and change the assert below. BCLDebug.Assert( perm.GetType().FullName.Equals( permname ), "Incorrect class name passed in! Was: " + permname + " Should be " + perm.GetType().FullName); root.AddAttribute( "version", "1" ); return root; } static internal void ValidateElement( SecurityElement elem, IPermission perm ) { if (elem == null) throw new ArgumentNullException( "elem" ); if (!XMLUtil.IsPermissionElement( perm, elem )) throw new ArgumentException( Environment.GetResourceString( "Argument_NotAPermissionElement")); String version = elem.Attribute( "version" ); if (version != null && !version.Equals( "1" )) throw new ArgumentException( Environment.GetResourceString( "Argument_InvalidXMLBadVersion") ); } abstract public SecurityElement ToXml(); abstract public void FromXml( SecurityElement elem ); // // Unimplemented interface methods // (as a reminder only) // public override String ToString() { return ToXml().ToString(); } // // HELPERS FOR IMPLEMENTING ABSTRACT METHODS // // // Protected helper // internal bool VerifyType(IPermission perm) { // if perm is null, then obviously not of the same type if ((perm == null) || (perm.GetType() != this.GetType())) { return(false); } else { return(true); } } // The IPermission Interface public abstract IPermission Copy(); public abstract IPermission Intersect(IPermission target); public abstract bool IsSubsetOf(IPermission target); [System.Runtime.InteropServices.ComVisible(false)] public override bool Equals(Object obj) { IPermission perm = obj as IPermission; if(obj != null && perm == null) return false; try { if(!this.IsSubsetOf(perm)) return false; if(perm != null && !perm.IsSubsetOf(this)) return false; } catch (ArgumentException) { // Any argument exception implies inequality // Note that we require a try/catch block here because we have to deal with // custom permissions that may throw exceptions indiscriminately. return false; } return true; } [System.Runtime.InteropServices.ComVisible(false)] public override int GetHashCode() { // This implementation is only to silence a compiler warning. return base.GetHashCode(); } internal bool CheckDemand(CodeAccessPermission grant) { BCLDebug.Assert( grant == null || grant.GetType().Equals( this.GetType() ), "CheckDemand not defined for permissions of different type" ); return IsSubsetOf( grant ); } internal bool CheckPermitOnly(CodeAccessPermission permitted) { BCLDebug.Assert( permitted == null || permitted.GetType().Equals( this.GetType() ), "CheckPermitOnly not defined for permissions of different type" ); return IsSubsetOf( permitted ); } internal bool CheckDeny(CodeAccessPermission denied) { BCLDebug.Assert( denied == null || denied.GetType().Equals( this.GetType() ), "CheckDeny not defined for permissions of different type" ); IPermission intersectPerm = Intersect(denied); return (intersectPerm == null || intersectPerm.IsSubsetOf(null)); } internal bool CheckAssert(CodeAccessPermission asserted) { BCLDebug.Assert( asserted == null || asserted.GetType().Equals( this.GetType() ), "CheckPermitOnly not defined for permissions of different type" ); return IsSubsetOf( asserted ); } internal bool CanUnrestrictedOverride() { return CanUnrestrictedOverride(this); } internal static bool CanUnrestrictedOverride(IPermission ip) { if(CodeAccessSecurityEngine.DoesFullTrustMeanFullTrust()) return true; if(ip is IUnrestrictedPermission) return true; return false; } } }
Link Menu

This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- ActivityExecutionWorkItem.cs
- SmtpMail.cs
- DesignerCapabilities.cs
- XmlSerializationReader.cs
- MemberInfoSerializationHolder.cs
- SiteIdentityPermission.cs
- FollowerQueueCreator.cs
- ObjectRef.cs
- XsdBuildProvider.cs
- Codec.cs
- ArraySortHelper.cs
- AffineTransform3D.cs
- RecordsAffectedEventArgs.cs
- BitmapCacheBrush.cs
- IPipelineRuntime.cs
- PathFigure.cs
- VectorCollection.cs
- DataGridViewDataConnection.cs
- SelectionGlyph.cs
- _ScatterGatherBuffers.cs
- ValidationError.cs
- SurrogateEncoder.cs
- BinHexEncoder.cs
- AxDesigner.cs
- invalidudtexception.cs
- DummyDataSource.cs
- JsonEnumDataContract.cs
- BindingOperations.cs
- SiteMapSection.cs
- FixedHyperLink.cs
- EventProviderTraceListener.cs
- InstanceOwnerException.cs
- validationstate.cs
- SafeBuffer.cs
- WebResourceAttribute.cs
- QilGenerator.cs
- InfoCardRSAPKCS1SignatureDeformatter.cs
- XmlSchemaSimpleTypeRestriction.cs
- DPTypeDescriptorContext.cs
- HTMLTagNameToTypeMapper.cs
- ConcatQueryOperator.cs
- AttachmentCollection.cs
- BuildProviderCollection.cs
- CompensationDesigner.cs
- SendKeys.cs
- ListCollectionView.cs
- XmlSchemaAttributeGroup.cs
- EventManager.cs
- DataTemplateSelector.cs
- PkcsMisc.cs
- ActivityInstanceReference.cs
- ObjectListCommandEventArgs.cs
- XPathNodeList.cs
- KeyedCollection.cs
- MimeTypeAttribute.cs
- BuildProviderAppliesToAttribute.cs
- QueryModel.cs
- Style.cs
- HtmlInputReset.cs
- EditorAttribute.cs
- HostProtectionPermission.cs
- PropertyPathConverter.cs
- DiscoveryClient.cs
- RawMouseInputReport.cs
- WebPartsSection.cs
- LateBoundBitmapDecoder.cs
- ConnectionsZone.cs
- RawTextInputReport.cs
- XsdDateTime.cs
- TiffBitmapDecoder.cs
- ProgressBarRenderer.cs
- UserControl.cs
- Queue.cs
- HighContrastHelper.cs
- PointAnimationClockResource.cs
- CustomLineCap.cs
- DesignerActionVerbList.cs
- DataBoundControlHelper.cs
- CommentAction.cs
- InternalResources.cs
- DependencyObjectCodeDomSerializer.cs
- ExtendedProperty.cs
- TableLayoutRowStyleCollection.cs
- WCFServiceClientProxyGenerator.cs
- NamespaceEmitter.cs
- DataGridViewLinkCell.cs
- SqlUdtInfo.cs
- DefaultTextStore.cs
- ToolStripItem.cs
- BindingExpressionUncommonField.cs
- _NtlmClient.cs
- StylusPointPropertyUnit.cs
- MembershipValidatePasswordEventArgs.cs
- HandlerMappingMemo.cs
- SqlDataSource.cs
- DataRelation.cs
- AppSettingsSection.cs
- SqlProfileProvider.cs
- DataProviderNameConverter.cs
- ShapingWorkspace.cs