Code:
/ Dotnetfx_Win7_3.5.1 / Dotnetfx_Win7_3.5.1 / 3.5.1 / DEVDIV / depot / DevDiv / releases / Orcas / NetFXw7 / wpf / src / Base / MS / Internal / IO / Zip / ZipIOCentralDirectoryDigitalSignature.cs / 1 / 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; 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; 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
- CheckBoxAutomationPeer.cs
- TearOffProxy.cs
- XmlDomTextWriter.cs
- ToolStripOverflow.cs
- XamlRtfConverter.cs
- XhtmlBasicValidationSummaryAdapter.cs
- ReadContentAsBinaryHelper.cs
- ViewDesigner.cs
- DrawingContextWalker.cs
- GroupBoxAutomationPeer.cs
- AttachedPropertyBrowsableWhenAttributePresentAttribute.cs
- AnnotationDocumentPaginator.cs
- NavigationService.cs
- ListViewTableRow.cs
- RangeEnumerable.cs
- AssemblyNameProxy.cs
- SatelliteContractVersionAttribute.cs
- HttpWriter.cs
- XmlNodeComparer.cs
- log.cs
- EmbeddedMailObject.cs
- ContainerFilterService.cs
- LayoutSettings.cs
- ComponentSerializationService.cs
- PropertyGeneratedEventArgs.cs
- wgx_commands.cs
- ObjectDataProvider.cs
- IndexingContentUnit.cs
- CellConstantDomain.cs
- EmptyEnumerator.cs
- SettingsAttributeDictionary.cs
- MsmqNonTransactedPoisonHandler.cs
- AppDomainGrammarProxy.cs
- XPathDocument.cs
- DeleteIndexBinder.cs
- ClientScriptManager.cs
- TiffBitmapEncoder.cs
- ConstructorExpr.cs
- BamlRecordHelper.cs
- X509PeerCertificateElement.cs
- ConnectionStringsExpressionBuilder.cs
- BinaryMessageEncoder.cs
- LinearQuaternionKeyFrame.cs
- MouseGestureConverter.cs
- EntitySqlQueryCacheKey.cs
- StringAttributeCollection.cs
- CroppedBitmap.cs
- KeySplineConverter.cs
- PolicyManager.cs
- ResourceAttributes.cs
- SQLMembershipProvider.cs
- SafeBitVector32.cs
- MsmqBindingBase.cs
- Point4DValueSerializer.cs
- MarkupCompilePass2.cs
- ProtocolsConfiguration.cs
- OleDbTransaction.cs
- DataControlFieldCollection.cs
- DoWorkEventArgs.cs
- HttpDictionary.cs
- RemoteWebConfigurationHostServer.cs
- VScrollBar.cs
- Matrix3D.cs
- SplitterCancelEvent.cs
- LinqDataSourceDeleteEventArgs.cs
- EdmComplexPropertyAttribute.cs
- XmlSerializableServices.cs
- ComponentChangingEvent.cs
- ResourceExpression.cs
- SystemException.cs
- NullEntityWrapper.cs
- SystemDiagnosticsSection.cs
- SortDescriptionCollection.cs
- RevocationPoint.cs
- CapabilitiesSection.cs
- QueryableDataSourceHelper.cs
- LocalizeDesigner.cs
- MetadataUtilsSmi.cs
- TextBoxAutoCompleteSourceConverter.cs
- WebPartsPersonalization.cs
- OperationDescriptionCollection.cs
- MonikerBuilder.cs
- PointLightBase.cs
- ScalarOps.cs
- _ListenerRequestStream.cs
- SerialErrors.cs
- httpapplicationstate.cs
- XmlDataDocument.cs
- ParameterDataSourceExpression.cs
- SmtpLoginAuthenticationModule.cs
- ExpressionWriter.cs
- ManagedFilter.cs
- ImageListStreamer.cs
- PerformanceCountersElement.cs
- FilterQueryOptionExpression.cs
- DataTransferEventArgs.cs
- TimelineCollection.cs
- TextServicesDisplayAttribute.cs
- httpstaticobjectscollection.cs
- XmlHierarchicalEnumerable.cs