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/ 4.0 / 4.0 / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / Net / System / Net / SecureProtocols / SslStream.cs / 1305376 / SslStream.cs
/*++ Copyright (c) 2003 Microsoft Corporation Module Name: SslStream.cs Abstract: A public implementation of authenticated stream using SSL protocol Author: Alexei Vopilov Sept 28-2003 Revision History: --*/ namespace System.Net.Security { using System; using System.IO; using System.Threading; using System.Security.Authentication; using System.Security.Authentication.ExtendedProtection; using System.Security.Permissions; using System.Security.Principal; using System.Security.Cryptography.X509Certificates; using System.Net.Configuration; [Flags] public enum SslPolicyErrors { None = 0x0, RemoteCertificateNotAvailable = 0x1, RemoteCertificateNameMismatch = 0x2, RemoteCertificateChainErrors = 0x4 } public enum EncryptionPolicy { // Prohibit null ciphers (current system defaults) RequireEncryption = 0, // Add null ciphers to current system defaults AllowNoEncryption, // Request null ciphers only NoEncryption } // A user delegate used to verify remote SSL certificate public delegate bool RemoteCertificateValidationCallback(object sender, X509Certificate certificate, X509Chain chain, SslPolicyErrors sslPolicyErrors); // A user delegate used to select local SSL certificate public delegate X509Certificate LocalCertificateSelectionCallback(object sender, string targetHost, X509CertificateCollection localCertificates, X509Certificate remoteCertificate, string[] acceptableIssuers); // Internal versions of the above delegates internal delegate bool RemoteCertValidationCallback(string host, X509Certificate certificate, X509Chain chain, SslPolicyErrors sslPolicyErrors); internal delegate X509Certificate LocalCertSelectionCallback(string targetHost, X509CertificateCollection localCertificates, X509Certificate remoteCertificate, string[] acceptableIssuers); // // // public class SslStream: AuthenticatedStream { private SslState _SslState; private RemoteCertificateValidationCallback _userCertificateValidationCallback; private LocalCertificateSelectionCallback _userCertificateSelectionCallback; private object m_RemoteCertificateOrBytes; public SslStream(Stream innerStream) :this(innerStream, false, null, null) { } public SslStream(Stream innerStream, bool leaveInnerStreamOpen) :this(innerStream, leaveInnerStreamOpen, null, null, EncryptionPolicy.RequireEncryption) { } public SslStream(Stream innerStream, bool leaveInnerStreamOpen, RemoteCertificateValidationCallback userCertificateValidationCallback) :this(innerStream, leaveInnerStreamOpen, userCertificateValidationCallback, null, EncryptionPolicy.RequireEncryption) { } public SslStream(Stream innerStream, bool leaveInnerStreamOpen, RemoteCertificateValidationCallback userCertificateValidationCallback, LocalCertificateSelectionCallback userCertificateSelectionCallback) :this(innerStream, leaveInnerStreamOpen, userCertificateValidationCallback, userCertificateSelectionCallback, EncryptionPolicy.RequireEncryption) { } public SslStream(Stream innerStream, bool leaveInnerStreamOpen, RemoteCertificateValidationCallback userCertificateValidationCallback, LocalCertificateSelectionCallback userCertificateSelectionCallback, EncryptionPolicy encryptionPolicy) :base(innerStream, leaveInnerStreamOpen) { if (encryptionPolicy != EncryptionPolicy.RequireEncryption && encryptionPolicy != EncryptionPolicy.AllowNoEncryption && encryptionPolicy != EncryptionPolicy.NoEncryption) throw new ArgumentException(SR.GetString(SR.net_invalid_enum, "EncryptionPolicy"), "encryptionPolicy"); _userCertificateValidationCallback = userCertificateValidationCallback; _userCertificateSelectionCallback = userCertificateSelectionCallback; RemoteCertValidationCallback _userCertValidationCallbackWrapper = new RemoteCertValidationCallback(userCertValidationCallbackWrapper); LocalCertSelectionCallback _userCertSelectionCallbackWrapper = userCertificateSelectionCallback==null ? null : new LocalCertSelectionCallback(userCertSelectionCallbackWrapper); _SslState = new SslState(innerStream, _userCertValidationCallbackWrapper, _userCertSelectionCallbackWrapper, encryptionPolicy); } private bool userCertValidationCallbackWrapper(string hostName, X509Certificate certificate, X509Chain chain, SslPolicyErrors sslPolicyErrors) { m_RemoteCertificateOrBytes = certificate == null? null: certificate.GetRawCertData(); if (_userCertificateValidationCallback == null) { if (!_SslState.RemoteCertRequired) sslPolicyErrors &= ~SslPolicyErrors.RemoteCertificateNotAvailable; return (sslPolicyErrors == SslPolicyErrors.None); } else return _userCertificateValidationCallback(this, certificate, chain, sslPolicyErrors); } private X509Certificate userCertSelectionCallbackWrapper(string targetHost, X509CertificateCollection localCertificates, X509Certificate remoteCertificate, string[] acceptableIssuers) { return _userCertificateSelectionCallback(this, targetHost, localCertificates, remoteCertificate, acceptableIssuers); } // // Client side auth // public virtual void AuthenticateAsClient(string targetHost) { AuthenticateAsClient(targetHost, new X509CertificateCollection(), SslProtocols.Default, false); } // public virtual void AuthenticateAsClient(string targetHost, X509CertificateCollection clientCertificates, SslProtocols enabledSslProtocols, bool checkCertificateRevocation) { _SslState.ValidateCreateContext(false, targetHost, enabledSslProtocols, null, clientCertificates, true, checkCertificateRevocation); _SslState.ProcessAuthentication(null); } // [HostProtection(ExternalThreading=true)] public virtual IAsyncResult BeginAuthenticateAsClient(string targetHost, AsyncCallback asyncCallback, object asyncState) { return BeginAuthenticateAsClient(targetHost, new X509CertificateCollection(), SslProtocols.Default, false, asyncCallback, asyncState); } // [HostProtection(ExternalThreading=true)] public virtual IAsyncResult BeginAuthenticateAsClient(string targetHost, X509CertificateCollection clientCertificates, SslProtocols enabledSslProtocols, bool checkCertificateRevocation, AsyncCallback asyncCallback, object asyncState) { _SslState.ValidateCreateContext(false, targetHost, enabledSslProtocols, null, clientCertificates, true, checkCertificateRevocation); LazyAsyncResult result = new LazyAsyncResult(_SslState, asyncState, asyncCallback); _SslState.ProcessAuthentication(result); return result; } // public virtual void EndAuthenticateAsClient(IAsyncResult asyncResult) { _SslState.EndProcessAuthentication(asyncResult); } // // //server side auth // public virtual void AuthenticateAsServer(X509Certificate serverCertificate) { AuthenticateAsServer(serverCertificate, false, SslProtocols.Default, false); } // public virtual void AuthenticateAsServer(X509Certificate serverCertificate, bool clientCertificateRequired, SslProtocols enabledSslProtocols, bool checkCertificateRevocation) { if (!ComNetOS.IsWin2K) { throw new PlatformNotSupportedException(SR.GetString(SR.Win2000Required)); } _SslState.ValidateCreateContext(true, string.Empty, enabledSslProtocols, serverCertificate, null, clientCertificateRequired, checkCertificateRevocation); _SslState.ProcessAuthentication(null); } // [HostProtection(ExternalThreading=true)] public virtual IAsyncResult BeginAuthenticateAsServer(X509Certificate serverCertificate, AsyncCallback asyncCallback, object asyncState) { return BeginAuthenticateAsServer(serverCertificate, false, SslProtocols.Default, false, asyncCallback, asyncState); } // [HostProtection(ExternalThreading=true)] public virtual IAsyncResult BeginAuthenticateAsServer(X509Certificate serverCertificate, bool clientCertificateRequired, SslProtocols enabledSslProtocols, bool checkCertificateRevocation, AsyncCallback asyncCallback, object asyncState) { if (!ComNetOS.IsWin2K) { throw new PlatformNotSupportedException(SR.GetString(SR.Win2000Required)); } _SslState.ValidateCreateContext(true, string.Empty, enabledSslProtocols, serverCertificate, null, clientCertificateRequired, checkCertificateRevocation); LazyAsyncResult result = new LazyAsyncResult(_SslState, asyncState, asyncCallback); _SslState.ProcessAuthentication(result); return result; } // public virtual void EndAuthenticateAsServer(IAsyncResult asyncResult) { _SslState.EndProcessAuthentication(asyncResult); } public TransportContext TransportContext { get { return new SslStreamContext(this); } } internal ChannelBinding GetChannelBinding(ChannelBindingKind kind) { return _SslState.GetChannelBinding(kind); } // // // Base class properties // public override bool IsAuthenticated { get { return _SslState.IsAuthenticated; } } // public override bool IsMutuallyAuthenticated { get { return _SslState.IsMutuallyAuthenticated; } } // public override bool IsEncrypted { get { return IsAuthenticated; } } // public override bool IsSigned { get { return IsAuthenticated; } } // public override bool IsServer { get { return _SslState.IsServer; } } // // //SSL specific properties // // public virtual SslProtocols SslProtocol { get { return _SslState.SslProtocol; } } // public virtual bool CheckCertRevocationStatus { get { return _SslState.CheckCertRevocationStatus; } } // public virtual X509Certificate LocalCertificate { get { return _SslState.LocalCertificate; } } // public virtual X509Certificate RemoteCertificate { get { _SslState.CheckThrow(true); object chkCertificateOrBytes = m_RemoteCertificateOrBytes; if (chkCertificateOrBytes != null && chkCertificateOrBytes.GetType() == typeof(byte[])) return (X509Certificate)(m_RemoteCertificateOrBytes = new X509Certificate((byte[]) chkCertificateOrBytes)); else return chkCertificateOrBytes as X509Certificate; } } // // More informational properties // public virtual CipherAlgorithmType CipherAlgorithm { get { return _SslState.CipherAlgorithm; } } // public virtual int CipherStrength { get { return _SslState.CipherStrength; } } // public virtual HashAlgorithmType HashAlgorithm { get { return _SslState.HashAlgorithm; } } // public virtual int HashStrength { get { return _SslState.HashStrength; } } // public virtual ExchangeAlgorithmType KeyExchangeAlgorithm { get { return _SslState.KeyExchangeAlgorithm; } } // public virtual int KeyExchangeStrength { get { return _SslState.KeyExchangeStrength; } } // // // Stream contract implementation // // // public override bool CanSeek { get { return false; } } // public override bool CanRead { get { return _SslState.IsAuthenticated && InnerStream.CanRead; } } // public override bool CanTimeout { get { return InnerStream.CanTimeout; } } // public override bool CanWrite { get { return _SslState.IsAuthenticated && InnerStream.CanWrite; } } // // public override int ReadTimeout { get { return InnerStream.ReadTimeout; } set { InnerStream.ReadTimeout = value; } } // // public override int WriteTimeout { get { return InnerStream.WriteTimeout; } set { InnerStream.WriteTimeout = value; } } // public override long Length { get { return InnerStream.Length; } } // public override long Position { get { return InnerStream.Position; } set { throw new NotSupportedException(SR.GetString(SR.net_noseek)); } } // public override void SetLength(long value) { InnerStream.SetLength(value); } // public override long Seek(long offset, SeekOrigin origin) { throw new NotSupportedException(SR.GetString(SR.net_noseek)); } // public override void Flush() { _SslState.Flush(); } // // protected override void Dispose(bool disposing) { try { _SslState.Close(); } finally { base.Dispose(disposing); } } // public override int Read(byte[] buffer, int offset, int count) { return _SslState.SecureStream.Read(buffer, offset, count); } // public void Write(byte[] buffer) { _SslState.SecureStream.Write(buffer, 0, buffer.Length); } // public override void Write(byte[] buffer, int offset, int count) { _SslState.SecureStream.Write(buffer, offset, count); } // [HostProtection(ExternalThreading=true)] public override IAsyncResult BeginRead(byte[] buffer, int offset, int count, AsyncCallback asyncCallback, object asyncState) { return _SslState.SecureStream.BeginRead(buffer, offset, count, asyncCallback, asyncState); } // public override int EndRead(IAsyncResult asyncResult) { return _SslState.SecureStream.EndRead(asyncResult); } // [HostProtection(ExternalThreading=true)] public override IAsyncResult BeginWrite( byte[] buffer, int offset, int count, AsyncCallback asyncCallback, object asyncState) { return _SslState.SecureStream.BeginWrite(buffer, offset, count, asyncCallback, asyncState); } // public override void EndWrite(IAsyncResult asyncResult) { _SslState.SecureStream.EndWrite(asyncResult); } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved. /*++ Copyright (c) 2003 Microsoft Corporation Module Name: SslStream.cs Abstract: A public implementation of authenticated stream using SSL protocol Author: Alexei Vopilov Sept 28-2003 Revision History: --*/ namespace System.Net.Security { using System; using System.IO; using System.Threading; using System.Security.Authentication; using System.Security.Authentication.ExtendedProtection; using System.Security.Permissions; using System.Security.Principal; using System.Security.Cryptography.X509Certificates; using System.Net.Configuration; [Flags] public enum SslPolicyErrors { None = 0x0, RemoteCertificateNotAvailable = 0x1, RemoteCertificateNameMismatch = 0x2, RemoteCertificateChainErrors = 0x4 } public enum EncryptionPolicy { // Prohibit null ciphers (current system defaults) RequireEncryption = 0, // Add null ciphers to current system defaults AllowNoEncryption, // Request null ciphers only NoEncryption } // A user delegate used to verify remote SSL certificate public delegate bool RemoteCertificateValidationCallback(object sender, X509Certificate certificate, X509Chain chain, SslPolicyErrors sslPolicyErrors); // A user delegate used to select local SSL certificate public delegate X509Certificate LocalCertificateSelectionCallback(object sender, string targetHost, X509CertificateCollection localCertificates, X509Certificate remoteCertificate, string[] acceptableIssuers); // Internal versions of the above delegates internal delegate bool RemoteCertValidationCallback(string host, X509Certificate certificate, X509Chain chain, SslPolicyErrors sslPolicyErrors); internal delegate X509Certificate LocalCertSelectionCallback(string targetHost, X509CertificateCollection localCertificates, X509Certificate remoteCertificate, string[] acceptableIssuers); // // // public class SslStream: AuthenticatedStream { private SslState _SslState; private RemoteCertificateValidationCallback _userCertificateValidationCallback; private LocalCertificateSelectionCallback _userCertificateSelectionCallback; private object m_RemoteCertificateOrBytes; public SslStream(Stream innerStream) :this(innerStream, false, null, null) { } public SslStream(Stream innerStream, bool leaveInnerStreamOpen) :this(innerStream, leaveInnerStreamOpen, null, null, EncryptionPolicy.RequireEncryption) { } public SslStream(Stream innerStream, bool leaveInnerStreamOpen, RemoteCertificateValidationCallback userCertificateValidationCallback) :this(innerStream, leaveInnerStreamOpen, userCertificateValidationCallback, null, EncryptionPolicy.RequireEncryption) { } public SslStream(Stream innerStream, bool leaveInnerStreamOpen, RemoteCertificateValidationCallback userCertificateValidationCallback, LocalCertificateSelectionCallback userCertificateSelectionCallback) :this(innerStream, leaveInnerStreamOpen, userCertificateValidationCallback, userCertificateSelectionCallback, EncryptionPolicy.RequireEncryption) { } public SslStream(Stream innerStream, bool leaveInnerStreamOpen, RemoteCertificateValidationCallback userCertificateValidationCallback, LocalCertificateSelectionCallback userCertificateSelectionCallback, EncryptionPolicy encryptionPolicy) :base(innerStream, leaveInnerStreamOpen) { if (encryptionPolicy != EncryptionPolicy.RequireEncryption && encryptionPolicy != EncryptionPolicy.AllowNoEncryption && encryptionPolicy != EncryptionPolicy.NoEncryption) throw new ArgumentException(SR.GetString(SR.net_invalid_enum, "EncryptionPolicy"), "encryptionPolicy"); _userCertificateValidationCallback = userCertificateValidationCallback; _userCertificateSelectionCallback = userCertificateSelectionCallback; RemoteCertValidationCallback _userCertValidationCallbackWrapper = new RemoteCertValidationCallback(userCertValidationCallbackWrapper); LocalCertSelectionCallback _userCertSelectionCallbackWrapper = userCertificateSelectionCallback==null ? null : new LocalCertSelectionCallback(userCertSelectionCallbackWrapper); _SslState = new SslState(innerStream, _userCertValidationCallbackWrapper, _userCertSelectionCallbackWrapper, encryptionPolicy); } private bool userCertValidationCallbackWrapper(string hostName, X509Certificate certificate, X509Chain chain, SslPolicyErrors sslPolicyErrors) { m_RemoteCertificateOrBytes = certificate == null? null: certificate.GetRawCertData(); if (_userCertificateValidationCallback == null) { if (!_SslState.RemoteCertRequired) sslPolicyErrors &= ~SslPolicyErrors.RemoteCertificateNotAvailable; return (sslPolicyErrors == SslPolicyErrors.None); } else return _userCertificateValidationCallback(this, certificate, chain, sslPolicyErrors); } private X509Certificate userCertSelectionCallbackWrapper(string targetHost, X509CertificateCollection localCertificates, X509Certificate remoteCertificate, string[] acceptableIssuers) { return _userCertificateSelectionCallback(this, targetHost, localCertificates, remoteCertificate, acceptableIssuers); } // // Client side auth // public virtual void AuthenticateAsClient(string targetHost) { AuthenticateAsClient(targetHost, new X509CertificateCollection(), SslProtocols.Default, false); } // public virtual void AuthenticateAsClient(string targetHost, X509CertificateCollection clientCertificates, SslProtocols enabledSslProtocols, bool checkCertificateRevocation) { _SslState.ValidateCreateContext(false, targetHost, enabledSslProtocols, null, clientCertificates, true, checkCertificateRevocation); _SslState.ProcessAuthentication(null); } // [HostProtection(ExternalThreading=true)] public virtual IAsyncResult BeginAuthenticateAsClient(string targetHost, AsyncCallback asyncCallback, object asyncState) { return BeginAuthenticateAsClient(targetHost, new X509CertificateCollection(), SslProtocols.Default, false, asyncCallback, asyncState); } // [HostProtection(ExternalThreading=true)] public virtual IAsyncResult BeginAuthenticateAsClient(string targetHost, X509CertificateCollection clientCertificates, SslProtocols enabledSslProtocols, bool checkCertificateRevocation, AsyncCallback asyncCallback, object asyncState) { _SslState.ValidateCreateContext(false, targetHost, enabledSslProtocols, null, clientCertificates, true, checkCertificateRevocation); LazyAsyncResult result = new LazyAsyncResult(_SslState, asyncState, asyncCallback); _SslState.ProcessAuthentication(result); return result; } // public virtual void EndAuthenticateAsClient(IAsyncResult asyncResult) { _SslState.EndProcessAuthentication(asyncResult); } // // //server side auth // public virtual void AuthenticateAsServer(X509Certificate serverCertificate) { AuthenticateAsServer(serverCertificate, false, SslProtocols.Default, false); } // public virtual void AuthenticateAsServer(X509Certificate serverCertificate, bool clientCertificateRequired, SslProtocols enabledSslProtocols, bool checkCertificateRevocation) { if (!ComNetOS.IsWin2K) { throw new PlatformNotSupportedException(SR.GetString(SR.Win2000Required)); } _SslState.ValidateCreateContext(true, string.Empty, enabledSslProtocols, serverCertificate, null, clientCertificateRequired, checkCertificateRevocation); _SslState.ProcessAuthentication(null); } // [HostProtection(ExternalThreading=true)] public virtual IAsyncResult BeginAuthenticateAsServer(X509Certificate serverCertificate, AsyncCallback asyncCallback, object asyncState) { return BeginAuthenticateAsServer(serverCertificate, false, SslProtocols.Default, false, asyncCallback, asyncState); } // [HostProtection(ExternalThreading=true)] public virtual IAsyncResult BeginAuthenticateAsServer(X509Certificate serverCertificate, bool clientCertificateRequired, SslProtocols enabledSslProtocols, bool checkCertificateRevocation, AsyncCallback asyncCallback, object asyncState) { if (!ComNetOS.IsWin2K) { throw new PlatformNotSupportedException(SR.GetString(SR.Win2000Required)); } _SslState.ValidateCreateContext(true, string.Empty, enabledSslProtocols, serverCertificate, null, clientCertificateRequired, checkCertificateRevocation); LazyAsyncResult result = new LazyAsyncResult(_SslState, asyncState, asyncCallback); _SslState.ProcessAuthentication(result); return result; } // public virtual void EndAuthenticateAsServer(IAsyncResult asyncResult) { _SslState.EndProcessAuthentication(asyncResult); } public TransportContext TransportContext { get { return new SslStreamContext(this); } } internal ChannelBinding GetChannelBinding(ChannelBindingKind kind) { return _SslState.GetChannelBinding(kind); } // // // Base class properties // public override bool IsAuthenticated { get { return _SslState.IsAuthenticated; } } // public override bool IsMutuallyAuthenticated { get { return _SslState.IsMutuallyAuthenticated; } } // public override bool IsEncrypted { get { return IsAuthenticated; } } // public override bool IsSigned { get { return IsAuthenticated; } } // public override bool IsServer { get { return _SslState.IsServer; } } // // //SSL specific properties // // public virtual SslProtocols SslProtocol { get { return _SslState.SslProtocol; } } // public virtual bool CheckCertRevocationStatus { get { return _SslState.CheckCertRevocationStatus; } } // public virtual X509Certificate LocalCertificate { get { return _SslState.LocalCertificate; } } // public virtual X509Certificate RemoteCertificate { get { _SslState.CheckThrow(true); object chkCertificateOrBytes = m_RemoteCertificateOrBytes; if (chkCertificateOrBytes != null && chkCertificateOrBytes.GetType() == typeof(byte[])) return (X509Certificate)(m_RemoteCertificateOrBytes = new X509Certificate((byte[]) chkCertificateOrBytes)); else return chkCertificateOrBytes as X509Certificate; } } // // More informational properties // public virtual CipherAlgorithmType CipherAlgorithm { get { return _SslState.CipherAlgorithm; } } // public virtual int CipherStrength { get { return _SslState.CipherStrength; } } // public virtual HashAlgorithmType HashAlgorithm { get { return _SslState.HashAlgorithm; } } // public virtual int HashStrength { get { return _SslState.HashStrength; } } // public virtual ExchangeAlgorithmType KeyExchangeAlgorithm { get { return _SslState.KeyExchangeAlgorithm; } } // public virtual int KeyExchangeStrength { get { return _SslState.KeyExchangeStrength; } } // // // Stream contract implementation // // // public override bool CanSeek { get { return false; } } // public override bool CanRead { get { return _SslState.IsAuthenticated && InnerStream.CanRead; } } // public override bool CanTimeout { get { return InnerStream.CanTimeout; } } // public override bool CanWrite { get { return _SslState.IsAuthenticated && InnerStream.CanWrite; } } // // public override int ReadTimeout { get { return InnerStream.ReadTimeout; } set { InnerStream.ReadTimeout = value; } } // // public override int WriteTimeout { get { return InnerStream.WriteTimeout; } set { InnerStream.WriteTimeout = value; } } // public override long Length { get { return InnerStream.Length; } } // public override long Position { get { return InnerStream.Position; } set { throw new NotSupportedException(SR.GetString(SR.net_noseek)); } } // public override void SetLength(long value) { InnerStream.SetLength(value); } // public override long Seek(long offset, SeekOrigin origin) { throw new NotSupportedException(SR.GetString(SR.net_noseek)); } // public override void Flush() { _SslState.Flush(); } // // protected override void Dispose(bool disposing) { try { _SslState.Close(); } finally { base.Dispose(disposing); } } // public override int Read(byte[] buffer, int offset, int count) { return _SslState.SecureStream.Read(buffer, offset, count); } // public void Write(byte[] buffer) { _SslState.SecureStream.Write(buffer, 0, buffer.Length); } // public override void Write(byte[] buffer, int offset, int count) { _SslState.SecureStream.Write(buffer, offset, count); } // [HostProtection(ExternalThreading=true)] public override IAsyncResult BeginRead(byte[] buffer, int offset, int count, AsyncCallback asyncCallback, object asyncState) { return _SslState.SecureStream.BeginRead(buffer, offset, count, asyncCallback, asyncState); } // public override int EndRead(IAsyncResult asyncResult) { return _SslState.SecureStream.EndRead(asyncResult); } // [HostProtection(ExternalThreading=true)] public override IAsyncResult BeginWrite( byte[] buffer, int offset, int count, AsyncCallback asyncCallback, object asyncState) { return _SslState.SecureStream.BeginWrite(buffer, offset, count, asyncCallback, asyncState); } // public override void EndWrite(IAsyncResult asyncResult) { _SslState.SecureStream.EndWrite(asyncResult); } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. 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