Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / clr / src / BCL / System / Security / PermissionSetTriple.cs / 1305376 / PermissionSetTriple.cs
// ==++== // // Copyright (c) Microsoft Corporation. All rights reserved. // // ==--== /*============================================================================== ** ** Class: PermissionSetTriple ** **[....] ** ** Purpose: Container class for holding an AppDomain's Grantset and Refused sets. ** Also used for CompressedStacks which brings in the third PermissionSet. ** Hence, the name PermissionSetTriple. ** =============================================================================*/ namespace System.Security { using IEnumerator = System.Collections.IEnumerator; using System.Security; using System.Security.Permissions; using System.Runtime.InteropServices; using System.Diagnostics.Contracts; [Serializable] sealed internal class PermissionSetTriple { static private PermissionToken s_zoneToken; static private PermissionToken s_urlToken; internal PermissionSet AssertSet; internal PermissionSet GrantSet; internal PermissionSet RefusedSet; internal PermissionSetTriple() { Reset(); } internal PermissionSetTriple(PermissionSetTriple triple) { this.AssertSet = triple.AssertSet; this.GrantSet = triple.GrantSet; this.RefusedSet = triple.RefusedSet; } internal void Reset() { AssertSet = null; GrantSet = null; RefusedSet = null; } internal bool IsEmpty() { return (AssertSet == null && GrantSet == null && RefusedSet == null); } private PermissionToken ZoneToken { [System.Security.SecurityCritical] // auto-generated get { if (s_zoneToken == null) s_zoneToken = PermissionToken.GetToken(typeof(ZoneIdentityPermission)); return s_zoneToken; } } private PermissionToken UrlToken { [System.Security.SecurityCritical] // auto-generated get { if (s_urlToken == null) s_urlToken = PermissionToken.GetToken(typeof(UrlIdentityPermission)); return s_urlToken; } } [System.Security.SecurityCritical] // auto-generated internal bool Update(PermissionSetTriple psTriple, out PermissionSetTriple retTriple) { retTriple = null; // Special case: unrestricted assert. Note: dcs.Assert.IsUnrestricted => dcs.Grant.IsUnrestricted if (psTriple.AssertSet != null && psTriple.AssertSet.IsUnrestricted()) { return true; // stop construction } retTriple = UpdateAssert(psTriple.AssertSet); UpdateGrant(psTriple.GrantSet); UpdateRefused(psTriple.RefusedSet); return false; } [System.Security.SecurityCritical] // auto-generated internal PermissionSetTriple UpdateAssert(PermissionSet in_a) { PermissionSetTriple retTriple = null; if (in_a != null) { Contract.Assert((!in_a.IsUnrestricted()), "Cannot be unrestricted here"); // if we're already asserting in_a, nothing to do if (in_a.IsSubsetOf(AssertSet)) return null; PermissionSet retPs; if (GrantSet != null) retPs = in_a.Intersect(GrantSet); // Restrict the assert to what we've already been granted else { GrantSet = new PermissionSet(true); retPs = in_a.Copy(); // Currently unrestricted Grant: assert the whole assert set } bool bFailedToCompress; // removes anything that is already in the refused set from the assert set retPs = PermissionSet.RemoveRefusedPermissionSet(retPs, RefusedSet, out bFailedToCompress); if (!bFailedToCompress) bFailedToCompress = PermissionSet.IsIntersectingAssertedPermissions(retPs, AssertSet); if (bFailedToCompress) { retTriple = new PermissionSetTriple(this); this.Reset(); this.GrantSet = retTriple.GrantSet.Copy(); } if (AssertSet == null) AssertSet = retPs; else AssertSet.InplaceUnion(retPs); } return retTriple; } [System.Security.SecurityCritical] // auto-generated internal void UpdateGrant(PermissionSet in_g, out ZoneIdentityPermission z,out UrlIdentityPermission u) { z = null; u = null; if (in_g != null) { if (GrantSet == null) GrantSet = in_g.Copy(); else GrantSet.InplaceIntersect(in_g); z = (ZoneIdentityPermission)in_g.GetPermission(ZoneToken); u = (UrlIdentityPermission)in_g.GetPermission(UrlToken); } } [System.Security.SecurityCritical] // auto-generated internal void UpdateGrant(PermissionSet in_g) { if (in_g != null) { if (GrantSet == null) GrantSet = in_g.Copy(); else GrantSet.InplaceIntersect(in_g); } } internal void UpdateRefused(PermissionSet in_r) { if (in_r != null) { if (RefusedSet == null) RefusedSet = in_r.Copy(); else RefusedSet.InplaceUnion(in_r); } } [System.Security.SecurityCritical] // auto-generated static bool CheckAssert(PermissionSet pSet, CodeAccessPermission demand, PermissionToken permToken) { if (pSet != null) { pSet.CheckDecoded(demand, permToken); CodeAccessPermission perm = (CodeAccessPermission)pSet.GetPermission(demand); // If the assert set does contain the demanded permission, halt the stackwalk try { if (pSet.IsUnrestricted() || demand.CheckAssert(perm)) { return SecurityRuntime.StackHalt; } } catch (ArgumentException) { } } return SecurityRuntime.StackContinue; } [System.Security.SecurityCritical] // auto-generated static bool CheckAssert(PermissionSet assertPset, PermissionSet demandSet, out PermissionSet newDemandSet) { newDemandSet = null; if (assertPset!= null) { assertPset.CheckDecoded(demandSet); // If this frame asserts a superset of the demand set we're done if (demandSet.CheckAssertion(assertPset)) return SecurityRuntime.StackHalt; PermissionSet.RemoveAssertedPermissionSet(demandSet, assertPset, out newDemandSet); } return SecurityRuntime.StackContinue; } [System.Security.SecurityCritical] // auto-generated internal bool CheckDemand(CodeAccessPermission demand, PermissionToken permToken, RuntimeMethodHandleInternal rmh) { if (CheckAssert(AssertSet, demand, permToken) == SecurityRuntime.StackHalt) return SecurityRuntime.StackHalt; CodeAccessSecurityEngine.CheckHelper(GrantSet, RefusedSet, demand, permToken, rmh, null, SecurityAction.Demand, true); return SecurityRuntime.StackContinue; } [System.Security.SecurityCritical] // auto-generated internal bool CheckSetDemand(PermissionSet demandSet , out PermissionSet alteredDemandset, RuntimeMethodHandleInternal rmh) { alteredDemandset = null; if (CheckAssert(AssertSet, demandSet, out alteredDemandset) == SecurityRuntime.StackHalt) return SecurityRuntime.StackHalt; if (alteredDemandset != null) demandSet = alteredDemandset; // note that this does not modify demandSet external to this function. CodeAccessSecurityEngine.CheckSetHelper(GrantSet, RefusedSet, demandSet, rmh, null, SecurityAction.Demand, true); return SecurityRuntime.StackContinue; } [System.Security.SecurityCritical] // auto-generated internal bool CheckDemandNoThrow(CodeAccessPermission demand, PermissionToken permToken) { Contract.Assert(AssertSet == null, "AssertSet not null"); return CodeAccessSecurityEngine.CheckHelper(GrantSet, RefusedSet, demand, permToken, RuntimeMethodHandleInternal.EmptyHandle, null, SecurityAction.Demand, false); } [System.Security.SecurityCritical] // auto-generated internal bool CheckSetDemandNoThrow(PermissionSet demandSet) { Contract.Assert(AssertSet == null, "AssertSet not null"); return CodeAccessSecurityEngine.CheckSetHelper(GrantSet, RefusedSet, demandSet, RuntimeMethodHandleInternal.EmptyHandle, null, SecurityAction.Demand, false); } ////// Check to see if the triple satisfies a demand for the permission represented by the flag. /// ////// If the triple asserts for one of the bits in the flags, it is zeroed out. /// /// set of flags to check (See PermissionType) [System.Security.SecurityCritical] // auto-generated internal bool CheckFlags(ref int flags) { if (AssertSet != null) { // remove any permissions which were asserted for int assertFlags = SecurityManager.GetSpecialFlags(AssertSet, null); if ((flags & assertFlags) != 0) flags = flags & ~assertFlags; } return (SecurityManager.GetSpecialFlags(GrantSet, RefusedSet) & flags) == flags; } } } // 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
- ImpersonationContext.cs
- XmlSchemaAttributeGroupRef.cs
- EndpointAddressAugust2004.cs
- OdbcPermission.cs
- KeySplineConverter.cs
- LoginName.cs
- Color.cs
- ListViewSortEventArgs.cs
- RSAPKCS1KeyExchangeDeformatter.cs
- SchemaConstraints.cs
- BindableTemplateBuilder.cs
- PropertyEmitterBase.cs
- COSERVERINFO.cs
- ToolStripSettings.cs
- XPathNodeIterator.cs
- NativeMethodsOther.cs
- WebPartCancelEventArgs.cs
- Accessible.cs
- SrgsSemanticInterpretationTag.cs
- BaseCodeDomTreeGenerator.cs
- UniqueContractNameValidationBehavior.cs
- ChineseLunisolarCalendar.cs
- JoinQueryOperator.cs
- COM2ExtendedTypeConverter.cs
- DataGridRowEventArgs.cs
- TrackBarRenderer.cs
- SignedXmlDebugLog.cs
- hresults.cs
- RawMouseInputReport.cs
- XPathNodeInfoAtom.cs
- TreeViewItem.cs
- SafeNativeMethods.cs
- SafeFileMapViewHandle.cs
- CacheSection.cs
- Calendar.cs
- MobileCategoryAttribute.cs
- TraceLog.cs
- CrossContextChannel.cs
- AppDomainProtocolHandler.cs
- DynamicDataResources.Designer.cs
- Base64Decoder.cs
- GenericIdentity.cs
- cookieexception.cs
- OleDbConnection.cs
- NameNode.cs
- precedingsibling.cs
- DrawItemEvent.cs
- ToolStripKeyboardHandlingService.cs
- DataService.cs
- filewebresponse.cs
- DbConnectionPoolOptions.cs
- DataGridViewRowConverter.cs
- MetadataCache.cs
- FrameworkContentElement.cs
- BasicCellRelation.cs
- Delegate.cs
- GlobalEventManager.cs
- TextServicesCompartmentContext.cs
- CodeAssignStatement.cs
- ProgressBarHighlightConverter.cs
- MailMessageEventArgs.cs
- ZipIOCentralDirectoryFileHeader.cs
- FtpRequestCacheValidator.cs
- FlowDecision.cs
- IssuedTokenClientBehaviorsElement.cs
- TextElement.cs
- XNodeNavigator.cs
- DoubleCollectionConverter.cs
- CodeAttributeDeclarationCollection.cs
- ZoneIdentityPermission.cs
- XpsImage.cs
- XmlSchemaSet.cs
- DefaultDiscoveryService.cs
- ListViewItemSelectionChangedEvent.cs
- DocumentPageView.cs
- CapiSymmetricAlgorithm.cs
- SelectingProviderEventArgs.cs
- DataGridViewComboBoxCell.cs
- StrokeSerializer.cs
- ImpersonationContext.cs
- Int32Collection.cs
- UserControlCodeDomTreeGenerator.cs
- GeneralTransform3DTo2D.cs
- MessageEventSubscriptionService.cs
- KeyValueConfigurationCollection.cs
- CompoundFileStorageReference.cs
- XhtmlBasicFormAdapter.cs
- PrincipalPermissionMode.cs
- Column.cs
- CommentEmitter.cs
- MenuItem.cs
- Token.cs
- RtfControlWordInfo.cs
- DomainUpDown.cs
- CodeArrayIndexerExpression.cs
- SelectionBorderGlyph.cs
- PropertyChangeTracker.cs
- DataColumnMapping.cs
- ProxyAttribute.cs
- DBAsyncResult.cs