Code:
/ Dotnetfx_Vista_SP2 / Dotnetfx_Vista_SP2 / 8.0.50727.4016 / DEVDIV / depot / DevDiv / releases / whidbey / NetFxQFE / ndp / clr / src / BCL / System / Security / PermissionSetTriple.cs / 1 / 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; [Serializable()] sealed internal class PermissionSetTriple { unsafe static private RuntimeMethodHandle s_emptyRMH = new RuntimeMethodHandle(null); 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 { get { if (s_zoneToken == null) s_zoneToken = PermissionToken.GetToken(typeof(ZoneIdentityPermission)); return s_zoneToken; } } private PermissionToken UrlToken { get { if (s_urlToken == null) s_urlToken = PermissionToken.GetToken(typeof(UrlIdentityPermission)); return s_urlToken; } } 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; } internal PermissionSetTriple UpdateAssert(PermissionSet in_a) { PermissionSetTriple retTriple = null; if (in_a != null) { BCLDebug.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; } 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); } } 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); } } 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.CanUnrestrictedOverride()) || demand.CheckAssert(perm)) { return SecurityRuntime.StackHalt; } } catch (ArgumentException) { } } return SecurityRuntime.StackContinue; } 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; } internal bool CheckDemand(CodeAccessPermission demand, PermissionToken permToken, RuntimeMethodHandle 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; } internal bool CheckSetDemand(PermissionSet demandSet , out PermissionSet alteredDemandset, RuntimeMethodHandle 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; } internal bool CheckDemandNoThrow(CodeAccessPermission demand, PermissionToken permToken) { BCLDebug.Assert(AssertSet == null, "AssertSet not null"); return CodeAccessSecurityEngine.CheckHelper(GrantSet, RefusedSet, demand, permToken, s_emptyRMH, null, SecurityAction.Demand, false); } internal bool CheckSetDemandNoThrow(PermissionSet demandSet) { BCLDebug.Assert(AssertSet == null, "AssertSet not null"); return CodeAccessSecurityEngine.CheckSetHelper(GrantSet, RefusedSet, demandSet, s_emptyRMH, 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) 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. // ==++== // // 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; [Serializable()] sealed internal class PermissionSetTriple { unsafe static private RuntimeMethodHandle s_emptyRMH = new RuntimeMethodHandle(null); 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 { get { if (s_zoneToken == null) s_zoneToken = PermissionToken.GetToken(typeof(ZoneIdentityPermission)); return s_zoneToken; } } private PermissionToken UrlToken { get { if (s_urlToken == null) s_urlToken = PermissionToken.GetToken(typeof(UrlIdentityPermission)); return s_urlToken; } } 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; } internal PermissionSetTriple UpdateAssert(PermissionSet in_a) { PermissionSetTriple retTriple = null; if (in_a != null) { BCLDebug.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; } 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); } } 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); } } 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.CanUnrestrictedOverride()) || demand.CheckAssert(perm)) { return SecurityRuntime.StackHalt; } } catch (ArgumentException) { } } return SecurityRuntime.StackContinue; } 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; } internal bool CheckDemand(CodeAccessPermission demand, PermissionToken permToken, RuntimeMethodHandle 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; } internal bool CheckSetDemand(PermissionSet demandSet , out PermissionSet alteredDemandset, RuntimeMethodHandle 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; } internal bool CheckDemandNoThrow(CodeAccessPermission demand, PermissionToken permToken) { BCLDebug.Assert(AssertSet == null, "AssertSet not null"); return CodeAccessSecurityEngine.CheckHelper(GrantSet, RefusedSet, demand, permToken, s_emptyRMH, null, SecurityAction.Demand, false); } internal bool CheckSetDemandNoThrow(PermissionSet demandSet) { BCLDebug.Assert(AssertSet == null, "AssertSet not null"); return CodeAccessSecurityEngine.CheckSetHelper(GrantSet, RefusedSet, demandSet, s_emptyRMH, 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) 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
- GeometryGroup.cs
- SortQuery.cs
- ToolStripMenuItem.cs
- LogRestartAreaEnumerator.cs
- HtmlTableCellCollection.cs
- CompositeFontInfo.cs
- BitmapEffectDrawing.cs
- XPathAncestorIterator.cs
- PermissionToken.cs
- SqlIdentifier.cs
- ImageConverter.cs
- NativeMethods.cs
- UIElementAutomationPeer.cs
- SqlDependencyUtils.cs
- PropertyEntry.cs
- DefaultBindingPropertyAttribute.cs
- SqlServices.cs
- EmptyWithCancelationCheckWorkItem.cs
- DetailsViewInsertedEventArgs.cs
- AliasGenerator.cs
- ContextMarshalException.cs
- BinaryCommonClasses.cs
- TextProperties.cs
- ObjectDataSource.cs
- TraceFilter.cs
- CommandPlan.cs
- _FtpControlStream.cs
- SerializationInfo.cs
- versioninfo.cs
- ActivityCodeDomReferenceService.cs
- FontDriver.cs
- ContextMenuStrip.cs
- XhtmlBasicFormAdapter.cs
- RadioButtonAutomationPeer.cs
- RestHandler.cs
- SessionEndingCancelEventArgs.cs
- ActiveXSerializer.cs
- SoapSchemaImporter.cs
- StrongName.cs
- Button.cs
- AdapterDictionary.cs
- HostingMessageProperty.cs
- UserMapPath.cs
- _TimerThread.cs
- ListMarkerSourceInfo.cs
- RuntimeTrackingProfile.cs
- WebPartTransformer.cs
- RelatedCurrencyManager.cs
- ExtensionQuery.cs
- SymbolMethod.cs
- TextOnlyOutput.cs
- ProxySimple.cs
- metadatamappinghashervisitor.cs
- SubstitutionList.cs
- BindingManagerDataErrorEventArgs.cs
- XmlDataSourceDesigner.cs
- TypeDescriptionProvider.cs
- SoapTypeAttribute.cs
- DataGridViewAutoSizeColumnModeEventArgs.cs
- CodeAttachEventStatement.cs
- RepeaterItem.cs
- Pen.cs
- XhtmlBasicPanelAdapter.cs
- JavaScriptSerializer.cs
- HitTestDrawingContextWalker.cs
- CompressedStack.cs
- MetadataWorkspace.cs
- PathBox.cs
- XmlAnyElementAttribute.cs
- UTF7Encoding.cs
- RenameRuleObjectDialog.cs
- BitSet.cs
- HttpProcessUtility.cs
- XmlRawWriterWrapper.cs
- FrameAutomationPeer.cs
- SqlTypeSystemProvider.cs
- SwitchElementsCollection.cs
- FileUtil.cs
- AnonymousIdentificationSection.cs
- CalendarDateRange.cs
- Guid.cs
- FilteredAttributeCollection.cs
- FloatUtil.cs
- SpnegoTokenAuthenticator.cs
- XmlSerializationReader.cs
- TemplateEditingVerb.cs
- InvalidDataException.cs
- DesignTimeTemplateParser.cs
- ThreadPool.cs
- HttpHostedTransportConfiguration.cs
- HitTestWithGeometryDrawingContextWalker.cs
- ImageListImage.cs
- SingleConverter.cs
- HandledMouseEvent.cs
- ColumnHeader.cs
- MediaContext.cs
- ExtensibleClassFactory.cs
- RawStylusInputCustomDataList.cs
- UIElementCollection.cs
- SizeAnimationBase.cs