Code:
/ Dotnetfx_Vista_SP2 / Dotnetfx_Vista_SP2 / 8.0.50727.4016 / DEVDIV / depot / DevDiv / releases / whidbey / NetFxQFE / ndp / clr / src / BCL / System / Security / Cryptography / base64Transforms.cs / 1 / base64Transforms.cs
// ==++== // // Copyright (c) Microsoft Corporation. All rights reserved. // // ==--== // // Base64Transform.cs // // This file contains two ICryptoTransforms: ToBase64Transform and FromBase64Transform // they may be attached to a CryptoStream in either read or write mode namespace System.Security.Cryptography { using System; using System.IO; using System.Text; [Serializable] [System.Runtime.InteropServices.ComVisible(true)] public enum FromBase64TransformMode { IgnoreWhiteSpaces = 0, DoNotIgnoreWhiteSpaces = 1, } [System.Runtime.InteropServices.ComVisible(true)] public class ToBase64Transform : ICryptoTransform { private ASCIIEncoding asciiEncoding = new ASCIIEncoding(); // converting to Base64 takes 3 bytes input and generates 4 bytes output public int InputBlockSize { get { return(3); } } public int OutputBlockSize { get { return(4); } } public bool CanTransformMultipleBlocks { get { return(false); } } public virtual bool CanReuseTransform { get { return(true); } } public int TransformBlock(byte[] inputBuffer, int inputOffset, int inputCount, byte[] outputBuffer, int outputOffset) { if (asciiEncoding == null) throw new ObjectDisposedException(null, Environment.GetResourceString("ObjectDisposed_Generic")); // 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")); // for now, only convert 3 bytes to 4 char[] temp = new char[4]; Convert.ToBase64CharArray(inputBuffer, inputOffset, 3, temp, 0); byte[] tempBytes = asciiEncoding.GetBytes(temp); if (tempBytes.Length != 4) throw new CryptographicException(Environment.GetResourceString( "Cryptography_SSE_InvalidDataSize" )); Buffer.BlockCopy(tempBytes, 0, outputBuffer, outputOffset, tempBytes.Length); return(tempBytes.Length); } public byte[] TransformFinalBlock(byte[] inputBuffer, int inputOffset, int inputCount) { if (asciiEncoding == null) throw new ObjectDisposedException(null, Environment.GetResourceString("ObjectDisposed_Generic")); // 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")); // Convert.ToBase64CharArray already does padding, so all we have to check is that // the inputCount wasn't 0 // again, for now only a block at a time if (inputCount == 0) { return(new byte[0]); } else { char[] temp = new char[4]; Convert.ToBase64CharArray(inputBuffer, inputOffset, inputCount, temp, 0); byte[] tempBytes = asciiEncoding.GetBytes(temp); return(tempBytes); } } // must implement IDisposable, but in this case there's nothing to do. ///void IDisposable.Dispose() { Dispose(true); GC.SuppressFinalize(this); } public void Clear() { ((IDisposable) this).Dispose(); } protected virtual void Dispose(bool disposing) { if (disposing) { asciiEncoding = null; } } ~ToBase64Transform() { Dispose(false); } } [System.Runtime.InteropServices.ComVisible(true)] public class FromBase64Transform : ICryptoTransform { private byte[] _inputBuffer = new byte[4]; private int _inputIndex; private FromBase64TransformMode _whitespaces; // Constructors public FromBase64Transform() : this(FromBase64TransformMode.IgnoreWhiteSpaces) {} public FromBase64Transform(FromBase64TransformMode whitespaces) { _whitespaces = whitespaces; _inputIndex = 0; } // converting from Base64 generates 3 bytes output from each 4 bytes input block public int InputBlockSize { get { return(1); } } public int OutputBlockSize { get { return(3); } } public bool CanTransformMultipleBlocks { get { return(false); } } public virtual bool CanReuseTransform { get { return(true); } } public int TransformBlock(byte[] inputBuffer, int inputOffset, int inputCount, byte[] outputBuffer, int outputOffset) { byte[] temp = new byte[inputCount]; char[] tempChar; int effectiveCount; // 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")); if (_inputBuffer == null) throw new ObjectDisposedException(null, Environment.GetResourceString("ObjectDisposed_Generic")); if (_whitespaces == FromBase64TransformMode.IgnoreWhiteSpaces) { temp = DiscardWhiteSpaces(inputBuffer, inputOffset, inputCount); effectiveCount = temp.Length; } else { Buffer.InternalBlockCopy(inputBuffer, inputOffset, temp, 0, inputCount); effectiveCount = inputCount; } if (effectiveCount + _inputIndex < 4) { Buffer.InternalBlockCopy(temp, 0, _inputBuffer, _inputIndex, effectiveCount); _inputIndex += effectiveCount; return 0; } // Get the number of 4 bytes blocks to transform int numBlocks = (effectiveCount + _inputIndex) / 4; byte[] transformBuffer = new byte[_inputIndex + effectiveCount]; Buffer.InternalBlockCopy(_inputBuffer, 0, transformBuffer, 0, _inputIndex); Buffer.InternalBlockCopy(temp, 0, transformBuffer, _inputIndex, effectiveCount); _inputIndex = (effectiveCount + _inputIndex) % 4; Buffer.InternalBlockCopy(temp, effectiveCount - _inputIndex, _inputBuffer, 0, _inputIndex); tempChar = Encoding.ASCII.GetChars(transformBuffer, 0, 4*numBlocks); byte[] tempBytes = Convert.FromBase64CharArray(tempChar, 0, 4*numBlocks); Buffer.BlockCopy(tempBytes, 0, outputBuffer, outputOffset, tempBytes.Length); return(tempBytes.Length); } public byte[] TransformFinalBlock(byte[] inputBuffer, int inputOffset, int inputCount) { byte[] temp = new byte[inputCount]; char[] tempChar; int effectiveCount; // 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")); if (_inputBuffer == null) throw new ObjectDisposedException(null, Environment.GetResourceString("ObjectDisposed_Generic")); if (_whitespaces == FromBase64TransformMode.IgnoreWhiteSpaces) { temp = DiscardWhiteSpaces(inputBuffer, inputOffset, inputCount); effectiveCount = temp.Length; } else { Buffer.InternalBlockCopy(inputBuffer, inputOffset, temp, 0, inputCount); effectiveCount = inputCount; } if (effectiveCount + _inputIndex < 4) { Reset(); return (new byte[0]); } // Get the number of 4 bytes blocks to transform int numBlocks = (effectiveCount + _inputIndex) / 4; byte[] transformBuffer = new byte[_inputIndex + effectiveCount]; Buffer.InternalBlockCopy(_inputBuffer, 0, transformBuffer, 0, _inputIndex); Buffer.InternalBlockCopy(temp, 0, transformBuffer, _inputIndex, effectiveCount); _inputIndex = (effectiveCount + _inputIndex) % 4; Buffer.InternalBlockCopy(temp, effectiveCount - _inputIndex, _inputBuffer, 0, _inputIndex); tempChar = Encoding.ASCII.GetChars(transformBuffer, 0, 4*numBlocks); byte[] tempBytes = Convert.FromBase64CharArray(tempChar, 0, 4*numBlocks); // reinitialize the transform Reset(); return(tempBytes); } private byte[] DiscardWhiteSpaces(byte[] inputBuffer, int inputOffset, int inputCount) { int i, iCount = 0; for (i=0; i void IDisposable.Dispose() { Dispose(true); GC.SuppressFinalize(this); } // Reset the state of the transform so it can be used again private void Reset() { _inputIndex = 0; } public void Clear() { ((IDisposable) this).Dispose(); } protected virtual void Dispose(bool disposing) { // we always want to clear the input buffer if (disposing) { if (_inputBuffer != null) Array.Clear(_inputBuffer, 0, _inputBuffer.Length); _inputBuffer = null; _inputIndex = 0; } } ~FromBase64Transform() { Dispose(false); } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // ==++== // // Copyright (c) Microsoft Corporation. All rights reserved. // // ==--== // // Base64Transform.cs // // This file contains two ICryptoTransforms: ToBase64Transform and FromBase64Transform // they may be attached to a CryptoStream in either read or write mode namespace System.Security.Cryptography { using System; using System.IO; using System.Text; [Serializable] [System.Runtime.InteropServices.ComVisible(true)] public enum FromBase64TransformMode { IgnoreWhiteSpaces = 0, DoNotIgnoreWhiteSpaces = 1, } [System.Runtime.InteropServices.ComVisible(true)] public class ToBase64Transform : ICryptoTransform { private ASCIIEncoding asciiEncoding = new ASCIIEncoding(); // converting to Base64 takes 3 bytes input and generates 4 bytes output public int InputBlockSize { get { return(3); } } public int OutputBlockSize { get { return(4); } } public bool CanTransformMultipleBlocks { get { return(false); } } public virtual bool CanReuseTransform { get { return(true); } } public int TransformBlock(byte[] inputBuffer, int inputOffset, int inputCount, byte[] outputBuffer, int outputOffset) { if (asciiEncoding == null) throw new ObjectDisposedException(null, Environment.GetResourceString("ObjectDisposed_Generic")); // 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")); // for now, only convert 3 bytes to 4 char[] temp = new char[4]; Convert.ToBase64CharArray(inputBuffer, inputOffset, 3, temp, 0); byte[] tempBytes = asciiEncoding.GetBytes(temp); if (tempBytes.Length != 4) throw new CryptographicException(Environment.GetResourceString( "Cryptography_SSE_InvalidDataSize" )); Buffer.BlockCopy(tempBytes, 0, outputBuffer, outputOffset, tempBytes.Length); return(tempBytes.Length); } public byte[] TransformFinalBlock(byte[] inputBuffer, int inputOffset, int inputCount) { if (asciiEncoding == null) throw new ObjectDisposedException(null, Environment.GetResourceString("ObjectDisposed_Generic")); // 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")); // Convert.ToBase64CharArray already does padding, so all we have to check is that // the inputCount wasn't 0 // again, for now only a block at a time if (inputCount == 0) { return(new byte[0]); } else { char[] temp = new char[4]; Convert.ToBase64CharArray(inputBuffer, inputOffset, inputCount, temp, 0); byte[] tempBytes = asciiEncoding.GetBytes(temp); return(tempBytes); } } // must implement IDisposable, but in this case there's nothing to do. /// void IDisposable.Dispose() { Dispose(true); GC.SuppressFinalize(this); } public void Clear() { ((IDisposable) this).Dispose(); } protected virtual void Dispose(bool disposing) { if (disposing) { asciiEncoding = null; } } ~ToBase64Transform() { Dispose(false); } } [System.Runtime.InteropServices.ComVisible(true)] public class FromBase64Transform : ICryptoTransform { private byte[] _inputBuffer = new byte[4]; private int _inputIndex; private FromBase64TransformMode _whitespaces; // Constructors public FromBase64Transform() : this(FromBase64TransformMode.IgnoreWhiteSpaces) {} public FromBase64Transform(FromBase64TransformMode whitespaces) { _whitespaces = whitespaces; _inputIndex = 0; } // converting from Base64 generates 3 bytes output from each 4 bytes input block public int InputBlockSize { get { return(1); } } public int OutputBlockSize { get { return(3); } } public bool CanTransformMultipleBlocks { get { return(false); } } public virtual bool CanReuseTransform { get { return(true); } } public int TransformBlock(byte[] inputBuffer, int inputOffset, int inputCount, byte[] outputBuffer, int outputOffset) { byte[] temp = new byte[inputCount]; char[] tempChar; int effectiveCount; // 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")); if (_inputBuffer == null) throw new ObjectDisposedException(null, Environment.GetResourceString("ObjectDisposed_Generic")); if (_whitespaces == FromBase64TransformMode.IgnoreWhiteSpaces) { temp = DiscardWhiteSpaces(inputBuffer, inputOffset, inputCount); effectiveCount = temp.Length; } else { Buffer.InternalBlockCopy(inputBuffer, inputOffset, temp, 0, inputCount); effectiveCount = inputCount; } if (effectiveCount + _inputIndex < 4) { Buffer.InternalBlockCopy(temp, 0, _inputBuffer, _inputIndex, effectiveCount); _inputIndex += effectiveCount; return 0; } // Get the number of 4 bytes blocks to transform int numBlocks = (effectiveCount + _inputIndex) / 4; byte[] transformBuffer = new byte[_inputIndex + effectiveCount]; Buffer.InternalBlockCopy(_inputBuffer, 0, transformBuffer, 0, _inputIndex); Buffer.InternalBlockCopy(temp, 0, transformBuffer, _inputIndex, effectiveCount); _inputIndex = (effectiveCount + _inputIndex) % 4; Buffer.InternalBlockCopy(temp, effectiveCount - _inputIndex, _inputBuffer, 0, _inputIndex); tempChar = Encoding.ASCII.GetChars(transformBuffer, 0, 4*numBlocks); byte[] tempBytes = Convert.FromBase64CharArray(tempChar, 0, 4*numBlocks); Buffer.BlockCopy(tempBytes, 0, outputBuffer, outputOffset, tempBytes.Length); return(tempBytes.Length); } public byte[] TransformFinalBlock(byte[] inputBuffer, int inputOffset, int inputCount) { byte[] temp = new byte[inputCount]; char[] tempChar; int effectiveCount; // 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")); if (_inputBuffer == null) throw new ObjectDisposedException(null, Environment.GetResourceString("ObjectDisposed_Generic")); if (_whitespaces == FromBase64TransformMode.IgnoreWhiteSpaces) { temp = DiscardWhiteSpaces(inputBuffer, inputOffset, inputCount); effectiveCount = temp.Length; } else { Buffer.InternalBlockCopy(inputBuffer, inputOffset, temp, 0, inputCount); effectiveCount = inputCount; } if (effectiveCount + _inputIndex < 4) { Reset(); return (new byte[0]); } // Get the number of 4 bytes blocks to transform int numBlocks = (effectiveCount + _inputIndex) / 4; byte[] transformBuffer = new byte[_inputIndex + effectiveCount]; Buffer.InternalBlockCopy(_inputBuffer, 0, transformBuffer, 0, _inputIndex); Buffer.InternalBlockCopy(temp, 0, transformBuffer, _inputIndex, effectiveCount); _inputIndex = (effectiveCount + _inputIndex) % 4; Buffer.InternalBlockCopy(temp, effectiveCount - _inputIndex, _inputBuffer, 0, _inputIndex); tempChar = Encoding.ASCII.GetChars(transformBuffer, 0, 4*numBlocks); byte[] tempBytes = Convert.FromBase64CharArray(tempChar, 0, 4*numBlocks); // reinitialize the transform Reset(); return(tempBytes); } private byte[] DiscardWhiteSpaces(byte[] inputBuffer, int inputOffset, int inputCount) { int i, iCount = 0; for (i=0; i void IDisposable.Dispose() { Dispose(true); GC.SuppressFinalize(this); } // Reset the state of the transform so it can be used again private void Reset() { _inputIndex = 0; } public void Clear() { ((IDisposable) this).Dispose(); } protected virtual void Dispose(bool disposing) { // we always want to clear the input buffer if (disposing) { if (_inputBuffer != null) Array.Clear(_inputBuffer, 0, _inputBuffer.Length); _inputBuffer = null; _inputIndex = 0; } } ~FromBase64Transform() { Dispose(false); } } } // 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
- ContentFilePart.cs
- PnrpPermission.cs
- BaseParser.cs
- XmlImplementation.cs
- xmlfixedPageInfo.cs
- FixUpCollection.cs
- ReadOnlyHierarchicalDataSourceView.cs
- DPTypeDescriptorContext.cs
- ResolveNameEventArgs.cs
- SamlAuthenticationStatement.cs
- MetadataUtil.cs
- SqlTriggerContext.cs
- ManagementEventWatcher.cs
- LinkUtilities.cs
- PlainXmlSerializer.cs
- HttpSessionStateWrapper.cs
- TemplateContentLoader.cs
- PrintPreviewGraphics.cs
- KnownBoxes.cs
- PageParserFilter.cs
- MenuBindingsEditor.cs
- MILUtilities.cs
- ZipIOEndOfCentralDirectoryBlock.cs
- InkCanvasAutomationPeer.cs
- RoutedEventValueSerializer.cs
- SchemaHelper.cs
- IApplicationTrustManager.cs
- querybuilder.cs
- TableItemStyle.cs
- RowTypePropertyElement.cs
- PolicyException.cs
- RuntimeCompatibilityAttribute.cs
- remotingproxy.cs
- RootBrowserWindow.cs
- SiteMap.cs
- StorageScalarPropertyMapping.cs
- BookmarkTable.cs
- EventLogPermissionAttribute.cs
- ZipIOExtraFieldPaddingElement.cs
- ClientTargetSection.cs
- Visitor.cs
- ProviderCommandInfoUtils.cs
- WsdlHelpGeneratorElement.cs
- InheritedPropertyChangedEventArgs.cs
- ValidationErrorCollection.cs
- EventLogPermissionEntryCollection.cs
- SqlInternalConnectionSmi.cs
- CodeDirectoryCompiler.cs
- PathGradientBrush.cs
- ZoneButton.cs
- RtfToXamlReader.cs
- HandleCollector.cs
- ResourceAssociationType.cs
- TagNameToTypeMapper.cs
- ConfigXmlDocument.cs
- CreateParams.cs
- WebPartCancelEventArgs.cs
- SqlUserDefinedTypeAttribute.cs
- ValueOfAction.cs
- ScriptingSectionGroup.cs
- CodeExpressionCollection.cs
- SqlLiftIndependentRowExpressions.cs
- BamlLocalizableResource.cs
- IteratorDescriptor.cs
- PopupControlService.cs
- TimerElapsedEvenArgs.cs
- CookieParameter.cs
- CompilerError.cs
- LoginUtil.cs
- ListBoxDesigner.cs
- IsolatedStorageFileStream.cs
- SpoolingTaskBase.cs
- WorkflowQueueInfo.cs
- MatrixUtil.cs
- Vector3DAnimationUsingKeyFrames.cs
- BitmapEffectInputConnector.cs
- ObjectIDGenerator.cs
- ObjectFullSpanRewriter.cs
- X509WindowsSecurityToken.cs
- codemethodreferenceexpression.cs
- EntityType.cs
- ExecutionEngineException.cs
- RightsManagementEncryptionTransform.cs
- NonParentingControl.cs
- UnsafeNativeMethods.cs
- ConfigurationSectionGroupCollection.cs
- OrderByQueryOptionExpression.cs
- UpDownEvent.cs
- ZoneIdentityPermission.cs
- SHA512.cs
- ComponentEvent.cs
- DatagridviewDisplayedBandsData.cs
- AgileSafeNativeMemoryHandle.cs
- EncryptedXml.cs
- SoapConverter.cs
- UnsafeNativeMethodsPenimc.cs
- SqlBulkCopyColumnMappingCollection.cs
- Root.cs
- MetabaseServerConfig.cs
- HandleCollector.cs