Code:
/ WCF / WCF / 3.5.30729.1 / untmp / Orcas / SP / ndp / cdf / src / WCF / infocard / Service / managed / Microsoft / InfoCards / SafeRsaProviderHandle.cs / 1 / SafeRsaProviderHandle.cs
//------------------------------------------------------------------------------ // Copyright (c) Microsoft Corporation. All rights reserved. //----------------------------------------------------------------------------- namespace Microsoft.InfoCards { using System; using System.ComponentModel; using System.Globalization; using System.Runtime.InteropServices; using System.Runtime.ConstrainedExecution; using System.Security; using Microsoft.InfoCards.Diagnostics; using IDT=Microsoft.InfoCards.Diagnostics.InfoCardTrace; // // Summary: // Provides a wrapper over a handle retrieved by CryptAcquireContext // internal class SafeRsaProviderHandle : SafeHandle { [DllImport( "advapi32.dll", EntryPoint ="CryptAcquireContextW", CharSet = CharSet.Unicode, ExactSpelling = true, SetLastError = true ) ] [SuppressUnmanagedCodeSecurity] private static extern bool CryptAcquireContext( [Out] out SafeRsaProviderHandle hProv, [In] string pszContainer, [In] string pszProvider, [In] uint dwProvType, [In] uint dwFlags ); [DllImport( "advapi32.dll", EntryPoint = "CryptReleaseContext", CharSet = CharSet.Unicode, ExactSpelling = true, SetLastError = true ) ] [ReliabilityContract(Consistency.WillNotCorruptState, Cer.Success)] [SuppressUnmanagedCodeSecurity] private static extern bool CryptReleaseContext( [In] IntPtr hProv, [In] uint dwFlags ); public static SafeRsaProviderHandle Construct() { // // The native provider we use to do encryption and decryption and associated constants to // set up the Microsoft Enhanced RSA and AES provider // const uint CRYPT_VERIFYCONTEXT = 0xF0000000; const byte PROV_RSA_AES = 24; // // We use a null provider and CRYPT_VERIFYCONTEXT as a flag // to force the use of ephemeral keys. See http://support.microsoft.com/default.aspx?scid=kb%3Ben-us%3B238187 // for details. // SafeRsaProviderHandle h; if( !SafeRsaProviderHandle.CryptAcquireContext( out h, null, null, PROV_RSA_AES, CRYPT_VERIFYCONTEXT ) ) { Win32Exception e = new Win32Exception( Marshal.GetLastWin32Error() ); IDT.CloseInvalidOutSafeHandle(h); IDT.TraceAndLogException( e ); throw IDT.ThrowHelperError( new CommunicationException( e.Message ) ); } return h; } private SafeRsaProviderHandle() : base( IntPtr.Zero, true ) { } public override bool IsInvalid { get { return ( IntPtr.Zero == base.handle ); } } protected override bool ReleaseHandle() { #pragma warning suppress 56523 return CryptReleaseContext( base.handle, 0 ); } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved.
Link Menu
This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- regiisutil.cs
- PopOutPanel.cs
- HtmlTableRowCollection.cs
- ServiceDescriptionContext.cs
- Rect.cs
- VisualTreeUtils.cs
- AttributeAction.cs
- UTF7Encoding.cs
- ReverseInheritProperty.cs
- RenderTargetBitmap.cs
- FileNotFoundException.cs
- TextPenaltyModule.cs
- Tuple.cs
- SingleObjectCollection.cs
- ConfigurationLocation.cs
- QueryAccessibilityHelpEvent.cs
- BitmapEffectDrawing.cs
- safex509handles.cs
- TableCellCollection.cs
- PreservationFileWriter.cs
- AppDomainGrammarProxy.cs
- MimeXmlReflector.cs
- WindowCollection.cs
- SerializerDescriptor.cs
- Link.cs
- TableItemProviderWrapper.cs
- RuntimeResourceSet.cs
- GridView.cs
- MailHeaderInfo.cs
- DataBoundLiteralControl.cs
- METAHEADER.cs
- DocumentViewerConstants.cs
- CodeDirectiveCollection.cs
- TraceSection.cs
- ListViewAutomationPeer.cs
- AppDomainGrammarProxy.cs
- InputLanguageManager.cs
- GeneralTransform3DGroup.cs
- CompensationToken.cs
- RemoteWebConfigurationHostStream.cs
- ZeroOpNode.cs
- Wizard.cs
- MDIControlStrip.cs
- VersionConverter.cs
- ImageAutomationPeer.cs
- SchemaCreator.cs
- DataRecordObjectView.cs
- SqlDataAdapter.cs
- ConstructorExpr.cs
- DoubleAnimation.cs
- RecognizedAudio.cs
- FtpCachePolicyElement.cs
- SimpleMailWebEventProvider.cs
- PersonalizationState.cs
- AttachedPropertyMethodSelector.cs
- DataGridSortCommandEventArgs.cs
- SegmentInfo.cs
- SqlCachedBuffer.cs
- MetadataItem.cs
- MimeParameters.cs
- RecognizerStateChangedEventArgs.cs
- DateTimeOffsetConverter.cs
- BaseHashHelper.cs
- Exceptions.cs
- SizeConverter.cs
- DataGridBoolColumn.cs
- securitycriticaldataClass.cs
- DrawingVisual.cs
- MouseOverProperty.cs
- AssemblyResolver.cs
- SqlClientMetaDataCollectionNames.cs
- ScrollBar.cs
- XmlQualifiedName.cs
- RSAProtectedConfigurationProvider.cs
- PageCodeDomTreeGenerator.cs
- SamlAuthorizationDecisionClaimResource.cs
- TogglePatternIdentifiers.cs
- GridViewEditEventArgs.cs
- Policy.cs
- ImageCollectionEditor.cs
- HyperLinkColumn.cs
- XXXOnTypeBuilderInstantiation.cs
- PageThemeParser.cs
- StreamWithDictionary.cs
- ReceiveContext.cs
- XPathNode.cs
- NullExtension.cs
- ConfigurationManagerInternal.cs
- StructuredTypeInfo.cs
- DataGridViewCellValueEventArgs.cs
- PassportAuthentication.cs
- ImageConverter.cs
- UInt32Storage.cs
- FacetDescriptionElement.cs
- ping.cs
- WinEventWrap.cs
- TakeQueryOptionExpression.cs
- TreeNodeCollectionEditor.cs
- ProgressBarRenderer.cs
- PieceDirectory.cs