Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / cdf / src / WCF / infocard / Client / System / IdentityModel / Selectors / CryptoHandle.cs / 1305376 / CryptoHandle.cs
//------------------------------------------------------------------------------ // Copyright (c) Microsoft Corporation. All rights reserved. //----------------------------------------------------------------------------- // // Presharp uses the c# pragma mechanism to supress its warnings. // These are not recognised by the base compiler so we need to explictly // disable the following warnings. See http://winweb/cse/Tools/PREsharp/userguide/default.asp // for details. // #pragma warning disable 1634, 1691 // unknown message, unknown pragma namespace System.IdentityModel.Selectors { using System; using System.Runtime.InteropServices; using System.Threading; using System.Security; using System.Runtime.ConstrainedExecution; using System.Runtime.CompilerServices; using IDT=Microsoft.InfoCards.Diagnostics.InfoCardTrace; // // For common & resources // using Microsoft.InfoCards; // // Summary: // Wraps and manages the lifetime of a native crypto handle passed back from the native InfoCard API. // internal abstract class CryptoHandle : IDisposable { bool m_isDisposed; InternalRefCountedHandle m_internalHandle; // // Summary: // Creates a new CryptoHandle. ParamType has information as to what // nativeParameters has to be marshaled into. // protected CryptoHandle( InternalRefCountedHandle nativeHandle, DateTime expiration, IntPtr nativeParameters, Type paramType ) { m_internalHandle = nativeHandle; m_internalHandle.Initialize( expiration, Marshal.PtrToStructure( nativeParameters, paramType ) ); } // // Summary: // This constructor creates a new CryptoHandle instance with the same InternalRefCountedHandle and adds // a ref count to that InternalRefCountedHandle. // protected CryptoHandle( InternalRefCountedHandle internalHandle ) { m_internalHandle = internalHandle; m_internalHandle.AddRef(); } public InternalRefCountedHandle InternalHandle { get { ThrowIfDisposed(); return m_internalHandle; } } public DateTime Expiration { get { ThrowIfDisposed(); return m_internalHandle.Expiration; } } public object Parameters { get { ThrowIfDisposed(); return m_internalHandle.Parameters; } } // // Summary: // Creates a new CryptoHandle with same InternalRefCountedCryptoHandle. // public CryptoHandle Duplicate() { ThrowIfDisposed(); return OnDuplicate(); } // // Summary: // Allows subclasses to create a duplicate of their particular class. // protected abstract CryptoHandle OnDuplicate(); protected void ThrowIfDisposed() { if ( m_isDisposed ) { throw IDT.ThrowHelperError( new ObjectDisposedException( SR.GetString( SR.ClientCryptoSessionDisposed ) ) ); } } public void Dispose() { if ( m_isDisposed ) { return; } m_internalHandle.Release(); m_internalHandle = null; m_isDisposed = true; } // // Summary: // Given a pointer to a native cryptosession this method creates the appropriate CryptoHandle type. // static internal CryptoHandle Create( InternalRefCountedHandle nativeHandle ) { CryptoHandle handle = null; bool mustRelease = false; RuntimeHelpers.PrepareConstrainedRegions(); try { nativeHandle.DangerousAddRef( ref mustRelease ); RpcInfoCardCryptoHandle hCrypto = (RpcInfoCardCryptoHandle)Marshal.PtrToStructure( nativeHandle.DangerousGetHandle(), typeof( RpcInfoCardCryptoHandle ) ); DateTime expiration = DateTime.FromFileTimeUtc( hCrypto.expiration ); switch ( hCrypto.type ) { case RpcInfoCardCryptoHandle.HandleType.Asymmetric: handle = new AsymmetricCryptoHandle( nativeHandle, expiration, hCrypto.cryptoParameters ); break; case RpcInfoCardCryptoHandle.HandleType.Symmetric: handle = new SymmetricCryptoHandle( nativeHandle, expiration, hCrypto.cryptoParameters ); break; case RpcInfoCardCryptoHandle.HandleType.Transform: handle = new TransformCryptoHandle( nativeHandle, expiration, hCrypto.cryptoParameters ); break; case RpcInfoCardCryptoHandle.HandleType.Hash: handle = new HashCryptoHandle( nativeHandle, expiration, hCrypto.cryptoParameters ); break; default: IDT.DebugAssert( false, "Invalid crypto operation type" ); throw IDT.ThrowHelperError( new InvalidOperationException( SR.GetString( SR.GeneralExceptionMessage ) ) ); } return handle; } finally { if( mustRelease ) { nativeHandle.DangerousRelease(); } } } } // // Summary: // This class manages the lifetime of a native crypto handle through ref counts. Any number of CryptoHandles // may refer to a single InternalRefCountedHandle, but once they are all disposed this object will dispose // itself as well. // internal class InternalRefCountedHandle : SafeHandle { int m_refcount = 0; DateTime m_expiration; object m_parameters = null; [DllImport( "infocardapi.dll", EntryPoint ="CloseCryptoHandle", CharSet = CharSet.Unicode, CallingConvention = CallingConvention.StdCall, ExactSpelling = true, SetLastError = true ) ] [SuppressUnmanagedCodeSecurity] [ReliabilityContract(Consistency.WillNotCorruptState, Cer.Success)] private static extern bool CloseCryptoHandle( [In] IntPtr hKey ); private InternalRefCountedHandle() : base( IntPtr.Zero, true ) { m_refcount = 1; } public void Initialize( DateTime expiration, object parameters ) { m_expiration = expiration; m_parameters = parameters; } // // Summary: // The deserialized parameters specific to a particular type of CryptoHandle. // public object Parameters { get { ThrowIfInvalid(); return m_parameters; } } // // Summary: // The expiration of this CryptoHandle // public DateTime Expiration { get { ThrowIfInvalid(); return m_expiration; } } public void AddRef() { ThrowIfInvalid(); Interlocked.Increment( ref m_refcount ); } public void Release() { ThrowIfInvalid(); int refcount = Interlocked.Decrement( ref m_refcount ); if ( 0 == refcount ) { Dispose(); } } private void ThrowIfInvalid() { if ( IsInvalid ) { throw IDT.ThrowHelperError( new ObjectDisposedException( "InternalRefCountedHandle" ) ); } } public override bool IsInvalid { get { return ( IntPtr.Zero == base.handle ); } } protected override bool ReleaseHandle() { #pragma warning suppress 56523 return CloseCryptoHandle( base.handle ); } } } // 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
- AssemblyCollection.cs
- controlskin.cs
- RoleBoolean.cs
- DataGridViewTopRowAccessibleObject.cs
- TypeResolvingOptions.cs
- DataColumnChangeEvent.cs
- AsyncCompletedEventArgs.cs
- TypeReference.cs
- ActivityDesigner.cs
- SamlAuthorizationDecisionStatement.cs
- ReflectPropertyDescriptor.cs
- KeyboardNavigation.cs
- UntypedNullExpression.cs
- DictionaryKeyPropertyAttribute.cs
- SoundPlayer.cs
- SelectorAutomationPeer.cs
- SolidColorBrush.cs
- JoinSymbol.cs
- BooleanToVisibilityConverter.cs
- TransformerInfo.cs
- HttpResponseHeader.cs
- WebServiceClientProxyGenerator.cs
- uribuilder.cs
- EntitySetDataBindingList.cs
- EntityDesignerUtils.cs
- HwndSourceParameters.cs
- Viewport3DAutomationPeer.cs
- StylusButtonCollection.cs
- ComboBoxRenderer.cs
- ModelPropertyImpl.cs
- TimeZone.cs
- CertificateManager.cs
- TextTabProperties.cs
- BamlLocalizer.cs
- FixUp.cs
- FormClosedEvent.cs
- ReflectPropertyDescriptor.cs
- AssemblyName.cs
- WebBrowserSiteBase.cs
- IntSecurity.cs
- PauseStoryboard.cs
- UrlSyndicationContent.cs
- ExtentJoinTreeNode.cs
- webeventbuffer.cs
- ClientConfigurationHost.cs
- PermissionSetEnumerator.cs
- DbException.cs
- Size.cs
- ScriptingWebServicesSectionGroup.cs
- FixedLineResult.cs
- InternalTypeHelper.cs
- OutputCacheSettings.cs
- InstanceOwnerQueryResult.cs
- PrintDialog.cs
- HybridDictionary.cs
- BindingManagerDataErrorEventArgs.cs
- DrawingImage.cs
- SecurityTokenProvider.cs
- PropertyGridEditorPart.cs
- __TransparentProxy.cs
- NamespaceDisplay.xaml.cs
- MeasurementDCInfo.cs
- XmlTextReaderImpl.cs
- WebPartManagerInternals.cs
- ReferencedAssembly.cs
- SspiSecurityToken.cs
- WhitespaceRuleReader.cs
- DiagnosticSection.cs
- VirtualizedItemPattern.cs
- BadImageFormatException.cs
- SkewTransform.cs
- __Filters.cs
- GatewayIPAddressInformationCollection.cs
- Pointer.cs
- CrossContextChannel.cs
- RemoteWebConfigurationHostStream.cs
- StringBuilder.cs
- AssemblyBuilder.cs
- ObjectPersistData.cs
- PasswordTextNavigator.cs
- SynchronizationLockException.cs
- ContourSegment.cs
- ApplicationManager.cs
- DBPropSet.cs
- CodeGroup.cs
- GetPageCompletedEventArgs.cs
- DataGridRow.cs
- SimpleWorkerRequest.cs
- Form.cs
- RadioButtonAutomationPeer.cs
- VisualBasicSettingsHandler.cs
- VisualTreeUtils.cs
- Graphics.cs
- EventBuilder.cs
- DiscoveryInnerClientManaged11.cs
- BaseParser.cs
- FieldToken.cs
- CollectionType.cs
- ListView.cs
- nulltextnavigator.cs