128 lines
3.7 KiB
C#
128 lines
3.7 KiB
C#
//------------------------------------------------------------
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// Copyright (c) Microsoft Corporation. All rights reserved.
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//------------------------------------------------------------
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namespace System.IdentityModel
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{
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using System.IO;
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using System.Security.Cryptography;
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using System.IdentityModel.Tokens;
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using System.Xml;
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using System.Text;
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// for sequential use by one thread
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sealed class SignatureResourcePool
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{
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const int BufferSize = 64;
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CanonicalizationDriver canonicalizationDriver;
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HashStream hashStream;
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HashAlgorithm hashAlgorithm;
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#if NO
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XmlC14NWriter integratedWriter;
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#endif
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XmlDictionaryWriter utf8Writer;
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byte[] encodingBuffer;
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char[] base64Buffer;
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public char[] TakeBase64Buffer()
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{
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if (this.base64Buffer == null)
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{
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this.base64Buffer = new char[BufferSize];
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}
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return this.base64Buffer;
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}
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public CanonicalizationDriver TakeCanonicalizationDriver()
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{
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if (this.canonicalizationDriver == null)
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{
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this.canonicalizationDriver = new CanonicalizationDriver();
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}
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else
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{
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this.canonicalizationDriver.Reset();
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}
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return this.canonicalizationDriver;
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}
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public byte[] TakeEncodingBuffer()
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{
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if (this.encodingBuffer == null)
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{
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this.encodingBuffer = new byte[BufferSize];
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}
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return this.encodingBuffer;
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}
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public HashAlgorithm TakeHashAlgorithm(string algorithm)
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{
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if ( this.hashAlgorithm == null )
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{
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if ( string.IsNullOrEmpty( algorithm ) )
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{
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throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgument( algorithm, SR.GetString( SR.EmptyOrNullArgumentString, "algorithm" ) );
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}
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this.hashAlgorithm = CryptoHelper.CreateHashAlgorithm( algorithm );
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}
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else
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{
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this.hashAlgorithm.Initialize();
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}
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return this.hashAlgorithm;
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}
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public HashStream TakeHashStream(HashAlgorithm hash)
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{
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if (this.hashStream == null)
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{
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this.hashStream = new HashStream(hash);
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}
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else
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{
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this.hashStream.Reset(hash);
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}
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return this.hashStream;
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}
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public HashStream TakeHashStream(string algorithm)
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{
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return TakeHashStream(TakeHashAlgorithm(algorithm));
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}
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#if NO
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public XmlC14NWriter TakeIntegratedWriter(Stream stream)
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{
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return TakeIntegratedWriter(stream, false, null);
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}
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public XmlC14NWriter TakeIntegratedWriter(Stream stream, bool includeComments, string[] inclusivePrefixes)
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{
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if (this.integratedWriter == null)
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{
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this.integratedWriter = new XmlC14NWriter(stream, includeComments, inclusivePrefixes);
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}
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else
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{
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this.integratedWriter.SetOutput(stream, includeComments, inclusivePrefixes);
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}
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return this.integratedWriter;
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}
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#endif
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public XmlDictionaryWriter TakeUtf8Writer()
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{
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if (this.utf8Writer == null)
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{
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this.utf8Writer = XmlDictionaryWriter.CreateTextWriter(Stream.Null, Encoding.UTF8, false);
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}
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else
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{
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((IXmlTextWriterInitializer) this.utf8Writer).SetOutput(Stream.Null, Encoding.UTF8, false);
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}
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return this.utf8Writer;
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}
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}
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}
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