Code:
/ WCF / WCF / 3.5.30729.1 / untmp / Orcas / SP / ndp / cdf / src / WCF / infocard / Client / System / IdentityModel / Selectors / InfoCardSymmetricCrypto.cs / 1 / InfoCardSymmetricCrypto.cs
//------------------------------------------------------------------------------ // Copyright (c) Microsoft Corporation. All rights reserved. //----------------------------------------------------------------------------- namespace System.IdentityModel.Selectors { using System; using System.ComponentModel; using System.Runtime.InteropServices; using System.Security.Cryptography; using System.Security.Cryptography.Xml; using System.IdentityModel.Tokens; using System.Runtime.ConstrainedExecution; using System.Runtime.CompilerServices; using IDT=Microsoft.InfoCards.Diagnostics.InfoCardTrace; // // For common & resources // using Microsoft.InfoCards; // // Summary: // This class implements the ISymmetricCrypto interface and is used as an adapter between the // InfoCard system and Indigo. // internal class InfoCardSymmetricCrypto : SymmetricSecurityKey, IDisposable { SymmetricCryptoHandle m_cryptoHandle; RpcSymmetricCryptoParameters m_params; // // Summary: // Creates a new InfoCardSymmetricCrypto based on a SymmetricCryptoHandle // // Parameters: // cryptoHandle - A handle to the symmetric key on which to base this object. // public InfoCardSymmetricCrypto( SymmetricCryptoHandle cryptoHandle ) : base() { m_cryptoHandle = (SymmetricCryptoHandle)cryptoHandle.Duplicate(); try { m_params = (RpcSymmetricCryptoParameters) m_cryptoHandle.Parameters; } catch { if( null != m_cryptoHandle ) { m_cryptoHandle.Dispose(); m_cryptoHandle = null; } throw; } } // ICrypto public override int KeySize { get { return m_params.keySize;} } public override byte[] DecryptKey(string algorithmUri, byte[] keyData) { throw IDT.ThrowHelperError( new NotImplementedException() ); } public override byte[] EncryptKey(string algorithmUri, byte[] keyData) { throw IDT.ThrowHelperError( new NotImplementedException() ); } public override bool IsAsymmetricAlgorithm(string algorithmUri) { return InfoCardCryptoHelper.IsAsymmetricAlgorithm(algorithmUri); } public override bool IsSupportedAlgorithm(string algorithmUri) { switch (algorithmUri) { case SecurityAlgorithms.Aes128Encryption: case SecurityAlgorithms.HmacSha1Signature: case SecurityAlgorithms.Psha1KeyDerivation: case SecurityAlgorithms.Psha1KeyDerivationDec2005: return true; default: return false; } } // why does this map to supported? public override bool IsSymmetricAlgorithm(string algorithmUri) { return IsSupportedAlgorithm( algorithmUri ); } // ISymmetricCrypto public override byte[] GenerateDerivedKey(string algorithmUri, byte[] label, byte[] nonce, int derivedKeyLength, int offset) { IDT.DebugAssert( !String.IsNullOrEmpty( algorithmUri ), "null alg uri" ); IDT.DebugAssert( null != label && 0 != label.Length, "null label" ); IDT.DebugAssert( null != nonce && 0 != nonce.Length, "null nonce" ); if( !IsSupportedAlgorithm( algorithmUri ) ) { throw IDT.ThrowHelperError( new NotSupportedException( SR.GetString( SR.ClientUnsupportedCryptoAlgorithm, algorithmUri ) ) ); } byte[] derivedKey = null; using( HGlobalSafeHandle pLabel = HGlobalSafeHandle.Construct( label.Length ) ) { using( HGlobalSafeHandle pNonce = HGlobalSafeHandle.Construct( nonce.Length ) ) { GlobalAllocSafeHandle pDerivedKey = null; int cbDerivedKey = 0; Marshal.Copy( label, 0, pLabel.DangerousGetHandle(), label.Length ); Marshal.Copy( nonce, 0, pNonce.DangerousGetHandle(), nonce.Length ); int status = NativeMethods.GenerateDerivedKey( m_cryptoHandle.InternalHandle, label.Length, pLabel, nonce.Length, pNonce, derivedKeyLength, offset, algorithmUri, out cbDerivedKey, out pDerivedKey ); if ( 0 != status ) { throw IDT.ThrowHelperError( new Win32Exception( status ) ); } pDerivedKey.Length = cbDerivedKey; derivedKey = new byte[ pDerivedKey.Length ]; using( pDerivedKey ) { Marshal.Copy( pDerivedKey.DangerousGetHandle(), derivedKey, 0, pDerivedKey.Length ); } } } return derivedKey; } // // Summary: // Returns an ICryptoTransform based on the algorithm and initialization vector passed in and the underlying // CryptoHandle. // // Parameters: // algorithmUri - The algorithm that the transform you implement. // iv - The initialization vector to use in the transform // public override ICryptoTransform GetDecryptionTransform(string algorithmUri, byte[] iv) { ICryptoTransform transform; switch (algorithmUri) { case SecurityAlgorithms.Aes128Encryption: using ( InfoCardSymmetricAlgorithm symAlgo = new InfoCardSymmetricAlgorithm( m_cryptoHandle ) ) { symAlgo.IV = iv; transform = symAlgo.CreateDecryptor(); } break; default: throw IDT.ThrowHelperError( new NotSupportedException( SR.GetString( SR.ClientUnsupportedCryptoAlgorithm, algorithmUri ) ) ); } return transform; } // // Summary: // Returns an ICryptoTransform based on the algorithm and initialization vector passed in and the underlying // CryptoHandle. // // Parameters: // algorithmUri - The algorithm that the transform you implement. // iv - The initialization vector to use in the transform // public override ICryptoTransform GetEncryptionTransform(string algorithmUri, byte[] iv) { ICryptoTransform transform; switch (algorithmUri) { case SecurityAlgorithms.Aes128Encryption: using ( InfoCardSymmetricAlgorithm symAlgo = new InfoCardSymmetricAlgorithm( m_cryptoHandle ) ) { symAlgo.IV = iv; transform = symAlgo.CreateEncryptor(); } break; default: throw IDT.ThrowHelperError( new NotSupportedException( SR.GetString( SR.ClientUnsupportedCryptoAlgorithm, algorithmUri ) ) ); } return transform; } // // Summary: // Returns the size of the initialization vector for the underlying crypto algorithm. // public override int GetIVSize(string algorithmUri) { int size; switch (algorithmUri) { case SecurityAlgorithms.Aes128Encryption: RpcSymmetricCryptoParameters param = (RpcSymmetricCryptoParameters) m_cryptoHandle.Parameters; size = param.blockSize; break; default: throw IDT.ThrowHelperError( new NotSupportedException( SR.GetString( SR.ClientUnsupportedCryptoAlgorithm, algorithmUri ) ) ); } return size; } // // Summary: // Returns a KeyedHashAlgorithm based on the underlying crypto handle and the algorithm passed in. // public override KeyedHashAlgorithm GetKeyedHashAlgorithm(string algorithmUri) { switch (algorithmUri) { case SecurityAlgorithms.HmacSha1Signature: return new InfoCardKeyedHashAlgorithm( m_cryptoHandle ); default: throw IDT.ThrowHelperError( new NotSupportedException( SR.GetString( SR.ClientUnsupportedCryptoAlgorithm, algorithmUri ) ) ); } } // // Summary: // Returns a SymmetricAlgorithm based on the underlying crypto handle and the algorithm passed in. // public override SymmetricAlgorithm GetSymmetricAlgorithm(string algorithmUri) { SymmetricAlgorithm algorithm; switch (algorithmUri) { case SecurityAlgorithms.Aes128Encryption: algorithm = new InfoCardSymmetricAlgorithm( m_cryptoHandle ); break; default: throw IDT.ThrowHelperError( new NotSupportedException( SR.GetString( SR.ClientUnsupportedCryptoAlgorithm, algorithmUri ) ) ); } return algorithm; } public override byte[] GetSymmetricKey() { throw IDT.ThrowHelperError( new NotImplementedException() ); } // // IDisposable // public void Dispose() { if( null != m_cryptoHandle ) { m_cryptoHandle.Dispose(); m_cryptoHandle = null; } } } } // 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
- Timeline.cs
- RMEnrollmentPage2.cs
- JsonReader.cs
- EventManager.cs
- RuleSetCollection.cs
- QilCloneVisitor.cs
- String.cs
- BaseTemplateCodeDomTreeGenerator.cs
- PopupRoot.cs
- ObjectIDGenerator.cs
- OLEDB_Enum.cs
- ProfileInfo.cs
- PrintPreviewControl.cs
- TCPClient.cs
- MetaColumn.cs
- TokenBasedSet.cs
- PostBackOptions.cs
- ErrorWebPart.cs
- PreservationFileReader.cs
- SqlClientMetaDataCollectionNames.cs
- NoResizeSelectionBorderGlyph.cs
- PageVisual.cs
- updateconfighost.cs
- AudioFormatConverter.cs
- SqlGenericUtil.cs
- StringDictionary.cs
- RectangleHotSpot.cs
- PassportAuthenticationEventArgs.cs
- QilStrConcat.cs
- ReadOnlyCollectionBase.cs
- DeviceContext.cs
- XamlWrapperReaders.cs
- FormCollection.cs
- HashHelper.cs
- OrderablePartitioner.cs
- BooleanSwitch.cs
- InvokeProviderWrapper.cs
- SecurityException.cs
- SchemaImporter.cs
- ToolStrip.cs
- BaseTemplateCodeDomTreeGenerator.cs
- MTConfigUtil.cs
- ServiceBuildProvider.cs
- PerspectiveCamera.cs
- SqlDataSourceSelectingEventArgs.cs
- Rijndael.cs
- TypeContext.cs
- SHA1Managed.cs
- BaseResourcesBuildProvider.cs
- FrameworkReadOnlyPropertyMetadata.cs
- StopStoryboard.cs
- ActivityBuilderXamlWriter.cs
- WhitespaceRule.cs
- TransformCollection.cs
- DirectoryObjectSecurity.cs
- ValueExpressions.cs
- ConfigurationManagerHelper.cs
- NameTable.cs
- IRCollection.cs
- StructureChangedEventArgs.cs
- ContextMarshalException.cs
- SrgsElementFactoryCompiler.cs
- OutputCacheSettingsSection.cs
- PrintPreviewDialog.cs
- MemoryMappedView.cs
- MultiDataTrigger.cs
- CodeActivity.cs
- Fonts.cs
- AppModelKnownContentFactory.cs
- AgileSafeNativeMemoryHandle.cs
- FullTextLine.cs
- IriParsingElement.cs
- MenuTracker.cs
- TabletCollection.cs
- JsonDeserializer.cs
- Simplifier.cs
- BitmapEffectGeneralTransform.cs
- UIElement3DAutomationPeer.cs
- WebPartAuthorizationEventArgs.cs
- WebPageTraceListener.cs
- HijriCalendar.cs
- EventProviderBase.cs
- ArgumentDirectionHelper.cs
- ControlTemplate.cs
- AudioFileOut.cs
- XamlFigureLengthSerializer.cs
- SqlResolver.cs
- SystemIcons.cs
- SqlResolver.cs
- XmlMembersMapping.cs
- UnsafeNativeMethods.cs
- AttributeCollection.cs
- Tile.cs
- XmlSchemaException.cs
- OracleBFile.cs
- IdentifierCreationService.cs
- QilVisitor.cs
- Int16Converter.cs
- EntitySqlQueryState.cs
- CalendarButton.cs