Code:
/ 4.0 / 4.0 / DEVDIV_TFS / Dev10 / Releases / RTMRel / wpf / src / Base / MS / Internal / IO / Zip / ZipIOCentralDirectoryDigitalSignature.cs / 1305600 / ZipIOCentralDirectoryDigitalSignature.cs
//------------------------------------------------------------------------------ //------------- *** WARNING *** //------------- This file is part of a legally monitored development project. //------------- Do not check in changes to this project. Do not raid bugs on this //------------- code in the main PS database. Do not contact the owner of this //------------- code directly. Contact the legal team at ‘ZSLegal’ for assistance. //------------- *** WARNING *** //----------------------------------------------------------------------------- //----------------------------------------------------------------------------- // //// Copyright (C) Microsoft Corporation. All rights reserved. // // // Description: // This is an internal class that enables interactions with Zip archives // for OPC scenarios // // History: // 11/19/2004: IgorBel: Initial creation. // 09/14/2005: BruceMac: Disable creation of signatures and throw on parse if signature found: // If we encounter archive with encrypted and /or signed data we consider those as // “invalid OPC packages”. Even in case when client application has never requested // read/write operations with the encrypted and/or signed area of the archive. Motivations include: // 1. Security based // 2. It is inappropriate to silently ignore digital signatures because this may lead to users // assuming that the signature has been validated when in fact it has not. // //----------------------------------------------------------------------------- using System; using System.IO; using System.Diagnostics; using System.Collections; using System.Runtime.Serialization; using System.Windows; using MS.Internal.WindowsBase; namespace MS.Internal.IO.Zip { internal class ZipIOCentralDirectoryDigitalSignature { #if false internal static ZipIOCentralDirectoryDigitalSignature CreateNew() { ZipIOCentralDirectoryDigitalSignature record = new ZipIOCentralDirectoryDigitalSignature (); return record; } #endif internal static ZipIOCentralDirectoryDigitalSignature ParseRecord(BinaryReader reader) { // this record is optional, so let's check for presence of signature rightaway //let's ensure we have at least enough data to cover _fixedMinimalRecordSize bytes of signature if ((reader.BaseStream.Length - reader.BaseStream.Position) < _fixedMinimalRecordSize) { return null; } UInt32 signatureValue = reader.ReadUInt32(); if (signatureValue != _signatureConstant) { return null; } //at this point we can assume that Digital Signature Record is there // Convention is to throw throw new NotSupportedException(SR.Get(SRID.ZipNotSupportedSignedArchive)); // Zeus PS 3: disable creation/parsing of zip archive digital signatures #if ArchiveSignaturesEnabled ZipIOCentralDirectoryDigitalSignature record = new ZipIOCentralDirectoryDigitalSignature (); record._signature = signatureValue; record._sizeOfData = reader.ReadUInt16(); record._signatureData = reader.ReadBytes(record._sizeOfData ); record.Validate(); return record; #endif } // Zeus PS 3: disable creation/parsing of zip archive digital signatures #if ArchiveSignaturesEnabled internal void Save(BinaryWriter writer) { writer.Write(_signatureConstant); writer.Write(_sizeOfData); if (_sizeOfData > 0) { writer.Write(_signatureData , 0, _sizeOfData); } writer.Flush(); } internal long Size { get { return _fixedMinimalRecordSize + _sizeOfData; } } #endif private ZipIOCentralDirectoryDigitalSignature() { } // Zeus PS 3: disable creation/parsing of zip archive digital signatures #if ArchiveSignaturesEnabled private void Validate () { if (_signature != _signatureConstant) { throw new FileFormatException(SR.Get(SRID.CorruptedData)); } if (_sizeOfData != _signatureData.Length) { throw new FileFormatException(SR.Get(SRID.CorruptedData)); } } #endif private const long _fixedMinimalRecordSize = 6; private const UInt32 _signatureConstant = 0x05054b50; // Zeus PS 3: disable creation/parsing of zip archive digital signatures #if ArchiveSignaturesEnabled private UInt16 _sizeOfData; private UInt32 _signature = _signatureConstant; private byte[] _signatureData = null; #endif } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved. //------------------------------------------------------------------------------ //------------- *** WARNING *** //------------- This file is part of a legally monitored development project. //------------- Do not check in changes to this project. Do not raid bugs on this //------------- code in the main PS database. Do not contact the owner of this //------------- code directly. Contact the legal team at ‘ZSLegal’ for assistance. //------------- *** WARNING *** //----------------------------------------------------------------------------- //----------------------------------------------------------------------------- // //// Copyright (C) Microsoft Corporation. All rights reserved. // // // Description: // This is an internal class that enables interactions with Zip archives // for OPC scenarios // // History: // 11/19/2004: IgorBel: Initial creation. // 09/14/2005: BruceMac: Disable creation of signatures and throw on parse if signature found: // If we encounter archive with encrypted and /or signed data we consider those as // “invalid OPC packages”. Even in case when client application has never requested // read/write operations with the encrypted and/or signed area of the archive. Motivations include: // 1. Security based // 2. It is inappropriate to silently ignore digital signatures because this may lead to users // assuming that the signature has been validated when in fact it has not. // //----------------------------------------------------------------------------- using System; using System.IO; using System.Diagnostics; using System.Collections; using System.Runtime.Serialization; using System.Windows; using MS.Internal.WindowsBase; namespace MS.Internal.IO.Zip { internal class ZipIOCentralDirectoryDigitalSignature { #if false internal static ZipIOCentralDirectoryDigitalSignature CreateNew() { ZipIOCentralDirectoryDigitalSignature record = new ZipIOCentralDirectoryDigitalSignature (); return record; } #endif internal static ZipIOCentralDirectoryDigitalSignature ParseRecord(BinaryReader reader) { // this record is optional, so let's check for presence of signature rightaway //let's ensure we have at least enough data to cover _fixedMinimalRecordSize bytes of signature if ((reader.BaseStream.Length - reader.BaseStream.Position) < _fixedMinimalRecordSize) { return null; } UInt32 signatureValue = reader.ReadUInt32(); if (signatureValue != _signatureConstant) { return null; } //at this point we can assume that Digital Signature Record is there // Convention is to throw throw new NotSupportedException(SR.Get(SRID.ZipNotSupportedSignedArchive)); // Zeus PS 3: disable creation/parsing of zip archive digital signatures #if ArchiveSignaturesEnabled ZipIOCentralDirectoryDigitalSignature record = new ZipIOCentralDirectoryDigitalSignature (); record._signature = signatureValue; record._sizeOfData = reader.ReadUInt16(); record._signatureData = reader.ReadBytes(record._sizeOfData ); record.Validate(); return record; #endif } // Zeus PS 3: disable creation/parsing of zip archive digital signatures #if ArchiveSignaturesEnabled internal void Save(BinaryWriter writer) { writer.Write(_signatureConstant); writer.Write(_sizeOfData); if (_sizeOfData > 0) { writer.Write(_signatureData , 0, _sizeOfData); } writer.Flush(); } internal long Size { get { return _fixedMinimalRecordSize + _sizeOfData; } } #endif private ZipIOCentralDirectoryDigitalSignature() { } // Zeus PS 3: disable creation/parsing of zip archive digital signatures #if ArchiveSignaturesEnabled private void Validate () { if (_signature != _signatureConstant) { throw new FileFormatException(SR.Get(SRID.CorruptedData)); } if (_sizeOfData != _signatureData.Length) { throw new FileFormatException(SR.Get(SRID.CorruptedData)); } } #endif private const long _fixedMinimalRecordSize = 6; private const UInt32 _signatureConstant = 0x05054b50; // Zeus PS 3: disable creation/parsing of zip archive digital signatures #if ArchiveSignaturesEnabled private UInt16 _sizeOfData; private UInt32 _signature = _signatureConstant; private byte[] _signatureData = null; #endif } } // 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
- FixedHyperLink.cs
- DataListItemCollection.cs
- AutomationIdentifierGuids.cs
- EntityDataSource.cs
- TypeCacheManager.cs
- KeyTimeConverter.cs
- ObjectListGeneralPage.cs
- MethodSet.cs
- Flattener.cs
- ApplicationFileCodeDomTreeGenerator.cs
- TextMetrics.cs
- NativeDirectoryServicesQueryAPIs.cs
- GridViewCancelEditEventArgs.cs
- SynchronizationContext.cs
- SetIterators.cs
- ColorMatrix.cs
- SqlGatherProducedAliases.cs
- ListViewItemEventArgs.cs
- NonBatchDirectoryCompiler.cs
- OleDragDropHandler.cs
- BuildResult.cs
- CodeMemberMethod.cs
- Parser.cs
- ScriptModule.cs
- XhtmlStyleClass.cs
- XmlSerializerOperationFormatter.cs
- CustomAttributeSerializer.cs
- RandomNumberGenerator.cs
- EntityClientCacheKey.cs
- Component.cs
- BitmapEffect.cs
- IndexedGlyphRun.cs
- RecommendedAsConfigurableAttribute.cs
- SecurityContextSecurityToken.cs
- XmlExpressionDumper.cs
- TreeNodeStyle.cs
- ResourceKey.cs
- FilterEventArgs.cs
- DispatcherExceptionFilterEventArgs.cs
- ZoneMembershipCondition.cs
- DataGridViewCellErrorTextNeededEventArgs.cs
- ModelFactory.cs
- PropertyChangedEventArgs.cs
- SecurityTokenValidationException.cs
- CodeNamespaceCollection.cs
- EncryptedReference.cs
- LogicalExpressionEditor.cs
- COM2TypeInfoProcessor.cs
- WebPartConnectVerb.cs
- ListSortDescription.cs
- DataBindEngine.cs
- StylusEditingBehavior.cs
- InputMethodStateChangeEventArgs.cs
- ContentFileHelper.cs
- WebPartZone.cs
- DesignerActionItemCollection.cs
- StringOutput.cs
- WebBrowserDesigner.cs
- ReadOnlyDataSourceView.cs
- ThemeableAttribute.cs
- QueryParameter.cs
- DataGridViewControlCollection.cs
- XPathItem.cs
- RegexMatch.cs
- WindowsStatic.cs
- NotificationContext.cs
- BridgeDataReader.cs
- BigInt.cs
- RegexGroupCollection.cs
- PropertyChangingEventArgs.cs
- Convert.cs
- PreservationFileWriter.cs
- DrawingVisual.cs
- ObjectDataSourceStatusEventArgs.cs
- ObjectDataSourceView.cs
- BindToObject.cs
- DataGridRowAutomationPeer.cs
- EntityType.cs
- ToolBarTray.cs
- SspiHelper.cs
- EventLogPermissionEntry.cs
- LocalIdKeyIdentifierClause.cs
- UInt32.cs
- ControlParameter.cs
- LinqDataSourceHelper.cs
- WindowsTokenRoleProvider.cs
- IIS7UserPrincipal.cs
- Internal.cs
- CompiledQuery.cs
- StrongNameMembershipCondition.cs
- NamedServiceModelExtensionCollectionElement.cs
- FtpWebResponse.cs
- BamlVersionHeader.cs
- ColorAnimationUsingKeyFrames.cs
- DirectoryNotFoundException.cs
- WebScriptMetadataMessage.cs
- BitmapMetadata.cs
- MatrixTransform.cs
- TextCollapsingProperties.cs
- MenuCommandService.cs