Code:
/ 4.0 / 4.0 / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / clr / src / BCL / System / Security / Cryptography / HashAlgorithm.cs / 1305376 / HashAlgorithm.cs
// ==++== // // Copyright (c) Microsoft Corporation. All rights reserved. // // ==--== //[....] // // // HashAlgorithm.cs // namespace System.Security.Cryptography { using System.IO; using System.Diagnostics.Contracts; [System.Runtime.InteropServices.ComVisible(true)] public abstract class HashAlgorithm : IDisposable, ICryptoTransform { protected int HashSizeValue; protected internal byte[] HashValue; protected int State = 0; private bool m_bDisposed = false; protected HashAlgorithm() {} // // public properties // public virtual int HashSize { get { return HashSizeValue; } } public virtual byte[] Hash { get { if (m_bDisposed) throw new ObjectDisposedException(null); if (State != 0) throw new CryptographicUnexpectedOperationException(Environment.GetResourceString("Cryptography_HashNotYetFinalized")); return (byte[]) HashValue.Clone(); } } // // public methods // [System.Security.SecuritySafeCritical] // auto-generated static public HashAlgorithm Create() { return Create("System.Security.Cryptography.HashAlgorithm"); } [System.Security.SecuritySafeCritical] // auto-generated static public HashAlgorithm Create(String hashName) { return (HashAlgorithm) CryptoConfig.CreateFromName(hashName); } public byte[] ComputeHash(Stream inputStream) { if (m_bDisposed) throw new ObjectDisposedException(null); // Default the buffer size to 4K. byte[] buffer = new byte[4096]; int bytesRead; do { bytesRead = inputStream.Read(buffer, 0, 4096); if (bytesRead > 0) { HashCore(buffer, 0, bytesRead); } } while (bytesRead > 0); HashValue = HashFinal(); byte[] Tmp = (byte[]) HashValue.Clone(); Initialize(); return(Tmp); } public byte[] ComputeHash(byte[] buffer) { if (m_bDisposed) throw new ObjectDisposedException(null); // Do some validation if (buffer == null) throw new ArgumentNullException("buffer"); HashCore(buffer, 0, buffer.Length); HashValue = HashFinal(); byte[] Tmp = (byte[]) HashValue.Clone(); Initialize(); return(Tmp); } public byte[] ComputeHash(byte[] buffer, int offset, int count) { // Do some validation if (buffer == null) throw new ArgumentNullException("buffer"); if (offset < 0) throw new ArgumentOutOfRangeException("offset", Environment.GetResourceString("ArgumentOutOfRange_NeedNonNegNum")); if (count < 0 || (count > buffer.Length)) throw new ArgumentException(Environment.GetResourceString("Argument_InvalidValue")); if ((buffer.Length - count) < offset) throw new ArgumentException(Environment.GetResourceString("Argument_InvalidOffLen")); Contract.EndContractBlock(); if (m_bDisposed) throw new ObjectDisposedException(null); HashCore(buffer, offset, count); HashValue = HashFinal(); byte[] Tmp = (byte[]) HashValue.Clone(); Initialize(); return(Tmp); } // ICryptoTransform methods // we assume any HashAlgorithm can take input a byte at a time public virtual int InputBlockSize { get { return(1); } } public virtual int OutputBlockSize { get { return(1); } } public virtual bool CanTransformMultipleBlocks { get { return(true); } } public virtual bool CanReuseTransform { get { return(true); } } // We implement TransformBlock and TransformFinalBlock here [System.Security.SecuritySafeCritical] // auto-generated public int TransformBlock(byte[] inputBuffer, int inputOffset, int inputCount, byte[] outputBuffer, int outputOffset) { // Do some validation, we let BlockCopy do the destination array validation if (inputBuffer == null) throw new ArgumentNullException("inputBuffer"); if (inputOffset < 0) throw new ArgumentOutOfRangeException("inputOffset", Environment.GetResourceString("ArgumentOutOfRange_NeedNonNegNum")); if (inputCount < 0 || (inputCount > inputBuffer.Length)) throw new ArgumentException(Environment.GetResourceString("Argument_InvalidValue")); if ((inputBuffer.Length - inputCount) < inputOffset) throw new ArgumentException(Environment.GetResourceString("Argument_InvalidOffLen")); Contract.EndContractBlock(); if (m_bDisposed) throw new ObjectDisposedException(null); // Change the State value State = 1; HashCore(inputBuffer, inputOffset, inputCount); if ((outputBuffer != null) && ((inputBuffer != outputBuffer) || (inputOffset != outputOffset))) Buffer.BlockCopy(inputBuffer, inputOffset, outputBuffer, outputOffset, inputCount); return inputCount; } [System.Security.SecuritySafeCritical] // auto-generated public byte[] TransformFinalBlock(byte[] inputBuffer, int inputOffset, int inputCount) { // Do some validation if (inputBuffer == null) throw new ArgumentNullException("inputBuffer"); if (inputOffset < 0) throw new ArgumentOutOfRangeException("inputOffset", Environment.GetResourceString("ArgumentOutOfRange_NeedNonNegNum")); if (inputCount < 0 || (inputCount > inputBuffer.Length)) throw new ArgumentException(Environment.GetResourceString("Argument_InvalidValue")); if ((inputBuffer.Length - inputCount) < inputOffset) throw new ArgumentException(Environment.GetResourceString("Argument_InvalidOffLen")); Contract.EndContractBlock(); if (m_bDisposed) throw new ObjectDisposedException(null); HashCore(inputBuffer, inputOffset, inputCount); HashValue = HashFinal(); byte[] outputBytes = new byte[inputCount]; if (inputCount != 0) Buffer.InternalBlockCopy(inputBuffer, inputOffset, outputBytes, 0, inputCount); // reset the State value State = 0; return outputBytes; } // IDisposable methods // To keep mscorlib compatibility with Orcas, CoreCLR's HashAlgorithm has an explicit IDisposable // implementation. Post-Orcas the desktop has an implicit IDispoable implementation. #if FEATURE_CORECLR void IDisposable.Dispose() #if false { } #endif // false #else [System.Security.SecuritySafeCritical] // auto-generated public void Dispose() #endif // FEATURE_CORECLR { Dispose(true); GC.SuppressFinalize(this); } public void Clear() { (this as IDisposable).Dispose(); } protected virtual void Dispose(bool disposing) { if (disposing) { if (HashValue != null) Array.Clear(HashValue, 0, HashValue.Length); HashValue = null; m_bDisposed = true; } } // // abstract public methods // public abstract void Initialize(); protected abstract void HashCore(byte[] array, int ibStart, int cbSize); protected abstract byte[] HashFinal(); } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // ==++== // // Copyright (c) Microsoft Corporation. All rights reserved. // // ==--== //[....] // // // HashAlgorithm.cs // namespace System.Security.Cryptography { using System.IO; using System.Diagnostics.Contracts; [System.Runtime.InteropServices.ComVisible(true)] public abstract class HashAlgorithm : IDisposable, ICryptoTransform { protected int HashSizeValue; protected internal byte[] HashValue; protected int State = 0; private bool m_bDisposed = false; protected HashAlgorithm() {} // // public properties // public virtual int HashSize { get { return HashSizeValue; } } public virtual byte[] Hash { get { if (m_bDisposed) throw new ObjectDisposedException(null); if (State != 0) throw new CryptographicUnexpectedOperationException(Environment.GetResourceString("Cryptography_HashNotYetFinalized")); return (byte[]) HashValue.Clone(); } } // // public methods // [System.Security.SecuritySafeCritical] // auto-generated static public HashAlgorithm Create() { return Create("System.Security.Cryptography.HashAlgorithm"); } [System.Security.SecuritySafeCritical] // auto-generated static public HashAlgorithm Create(String hashName) { return (HashAlgorithm) CryptoConfig.CreateFromName(hashName); } public byte[] ComputeHash(Stream inputStream) { if (m_bDisposed) throw new ObjectDisposedException(null); // Default the buffer size to 4K. byte[] buffer = new byte[4096]; int bytesRead; do { bytesRead = inputStream.Read(buffer, 0, 4096); if (bytesRead > 0) { HashCore(buffer, 0, bytesRead); } } while (bytesRead > 0); HashValue = HashFinal(); byte[] Tmp = (byte[]) HashValue.Clone(); Initialize(); return(Tmp); } public byte[] ComputeHash(byte[] buffer) { if (m_bDisposed) throw new ObjectDisposedException(null); // Do some validation if (buffer == null) throw new ArgumentNullException("buffer"); HashCore(buffer, 0, buffer.Length); HashValue = HashFinal(); byte[] Tmp = (byte[]) HashValue.Clone(); Initialize(); return(Tmp); } public byte[] ComputeHash(byte[] buffer, int offset, int count) { // Do some validation if (buffer == null) throw new ArgumentNullException("buffer"); if (offset < 0) throw new ArgumentOutOfRangeException("offset", Environment.GetResourceString("ArgumentOutOfRange_NeedNonNegNum")); if (count < 0 || (count > buffer.Length)) throw new ArgumentException(Environment.GetResourceString("Argument_InvalidValue")); if ((buffer.Length - count) < offset) throw new ArgumentException(Environment.GetResourceString("Argument_InvalidOffLen")); Contract.EndContractBlock(); if (m_bDisposed) throw new ObjectDisposedException(null); HashCore(buffer, offset, count); HashValue = HashFinal(); byte[] Tmp = (byte[]) HashValue.Clone(); Initialize(); return(Tmp); } // ICryptoTransform methods // we assume any HashAlgorithm can take input a byte at a time public virtual int InputBlockSize { get { return(1); } } public virtual int OutputBlockSize { get { return(1); } } public virtual bool CanTransformMultipleBlocks { get { return(true); } } public virtual bool CanReuseTransform { get { return(true); } } // We implement TransformBlock and TransformFinalBlock here [System.Security.SecuritySafeCritical] // auto-generated public int TransformBlock(byte[] inputBuffer, int inputOffset, int inputCount, byte[] outputBuffer, int outputOffset) { // Do some validation, we let BlockCopy do the destination array validation if (inputBuffer == null) throw new ArgumentNullException("inputBuffer"); if (inputOffset < 0) throw new ArgumentOutOfRangeException("inputOffset", Environment.GetResourceString("ArgumentOutOfRange_NeedNonNegNum")); if (inputCount < 0 || (inputCount > inputBuffer.Length)) throw new ArgumentException(Environment.GetResourceString("Argument_InvalidValue")); if ((inputBuffer.Length - inputCount) < inputOffset) throw new ArgumentException(Environment.GetResourceString("Argument_InvalidOffLen")); Contract.EndContractBlock(); if (m_bDisposed) throw new ObjectDisposedException(null); // Change the State value State = 1; HashCore(inputBuffer, inputOffset, inputCount); if ((outputBuffer != null) && ((inputBuffer != outputBuffer) || (inputOffset != outputOffset))) Buffer.BlockCopy(inputBuffer, inputOffset, outputBuffer, outputOffset, inputCount); return inputCount; } [System.Security.SecuritySafeCritical] // auto-generated public byte[] TransformFinalBlock(byte[] inputBuffer, int inputOffset, int inputCount) { // Do some validation if (inputBuffer == null) throw new ArgumentNullException("inputBuffer"); if (inputOffset < 0) throw new ArgumentOutOfRangeException("inputOffset", Environment.GetResourceString("ArgumentOutOfRange_NeedNonNegNum")); if (inputCount < 0 || (inputCount > inputBuffer.Length)) throw new ArgumentException(Environment.GetResourceString("Argument_InvalidValue")); if ((inputBuffer.Length - inputCount) < inputOffset) throw new ArgumentException(Environment.GetResourceString("Argument_InvalidOffLen")); Contract.EndContractBlock(); if (m_bDisposed) throw new ObjectDisposedException(null); HashCore(inputBuffer, inputOffset, inputCount); HashValue = HashFinal(); byte[] outputBytes = new byte[inputCount]; if (inputCount != 0) Buffer.InternalBlockCopy(inputBuffer, inputOffset, outputBytes, 0, inputCount); // reset the State value State = 0; return outputBytes; } // IDisposable methods // To keep mscorlib compatibility with Orcas, CoreCLR's HashAlgorithm has an explicit IDisposable // implementation. Post-Orcas the desktop has an implicit IDispoable implementation. #if FEATURE_CORECLR void IDisposable.Dispose() #if false { } #endif // false #else [System.Security.SecuritySafeCritical] // auto-generated public void Dispose() #endif // FEATURE_CORECLR { Dispose(true); GC.SuppressFinalize(this); } public void Clear() { (this as IDisposable).Dispose(); } protected virtual void Dispose(bool disposing) { if (disposing) { if (HashValue != null) Array.Clear(HashValue, 0, HashValue.Length); HashValue = null; m_bDisposed = true; } } // // abstract public methods // public abstract void Initialize(); protected abstract void HashCore(byte[] array, int ibStart, int cbSize); protected abstract byte[] HashFinal(); } } // 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
- StylusOverProperty.cs
- PointAnimationUsingKeyFrames.cs
- RuntimeConfigurationRecord.cs
- LocationReference.cs
- URL.cs
- ToolBar.cs
- WizardPanelChangingEventArgs.cs
- ResourceReferenceKeyNotFoundException.cs
- MsmqInputChannel.cs
- RuleRef.cs
- AtomicFile.cs
- SubpageParagraph.cs
- CurrencyManager.cs
- ConfigPathUtility.cs
- ButtonFlatAdapter.cs
- SQLDoubleStorage.cs
- translator.cs
- HttpCapabilitiesBase.cs
- FrameworkContentElement.cs
- IntSecurity.cs
- InstanceData.cs
- CryptoConfig.cs
- DataContractSet.cs
- ZipIOExtraFieldZip64Element.cs
- SoundPlayerAction.cs
- UpDownBase.cs
- ZipIOZip64EndOfCentralDirectoryBlock.cs
- PageContentCollection.cs
- PrintPreviewDialog.cs
- StrokeNodeEnumerator.cs
- ObjectItemCollection.cs
- SqlProviderServices.cs
- PageBreakRecord.cs
- AppDomainFactory.cs
- XmlBufferReader.cs
- DataTableCollection.cs
- OperationAbortedException.cs
- Rule.cs
- Page.cs
- DesignerHierarchicalDataSourceView.cs
- AttributeExtensions.cs
- BaseAppDomainProtocolHandler.cs
- VisualProxy.cs
- SQLUtility.cs
- CodePrimitiveExpression.cs
- DataTablePropertyDescriptor.cs
- AddInBase.cs
- DataGridColumn.cs
- SpanIndex.cs
- DataGridItemEventArgs.cs
- C14NUtil.cs
- BamlStream.cs
- ParameterEditorUserControl.cs
- RelativeSource.cs
- InboundActivityHelper.cs
- X509ChainElement.cs
- PointValueSerializer.cs
- MiniLockedBorderGlyph.cs
- GeneralTransformCollection.cs
- XmlILCommand.cs
- dbenumerator.cs
- MULTI_QI.cs
- CqlGenerator.cs
- PasswordTextContainer.cs
- LinkGrep.cs
- ContainerUtilities.cs
- DbCommandTree.cs
- LinkedResource.cs
- ContainerCodeDomSerializer.cs
- FixUp.cs
- SessionState.cs
- SafeCryptHandles.cs
- AppSettingsExpressionBuilder.cs
- CngKey.cs
- WebPartTransformerAttribute.cs
- HttpModulesSection.cs
- DBCSCodePageEncoding.cs
- ProcessHostConfigUtils.cs
- InternalRelationshipCollection.cs
- _IPv6Address.cs
- PartialList.cs
- SafeLocalAllocation.cs
- XPathPatternParser.cs
- SchemaImporter.cs
- DBConnectionString.cs
- FormsAuthenticationCredentials.cs
- EntityContainer.cs
- Transform3D.cs
- BinHexDecoder.cs
- NetSectionGroup.cs
- Rules.cs
- base64Transforms.cs
- TypeUtil.cs
- CryptoApi.cs
- SqlWebEventProvider.cs
- SqlXmlStorage.cs
- EventRouteFactory.cs
- RequestCachingSection.cs
- HtmlInputReset.cs
- MaterialGroup.cs