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//------------------------------------------------------------
// Copyright (c) Microsoft Corporation. All rights reserved.
//------------------------------------------------------------
namespace System.ServiceModel
{
using System;
using System.Security.Authentication;
using System.Security.Authentication.ExtendedProtection;
using System.ServiceModel.Channels;
using System.ServiceModel.Security;
using System.Net;
using System.Net.Security;
using System.ComponentModel;
public sealed class TcpTransportSecurity
{
internal const TcpClientCredentialType DefaultClientCredentialType = TcpClientCredentialType.Windows;
internal const ProtectionLevel DefaultProtectionLevel = ProtectionLevel.EncryptAndSign;
TcpClientCredentialType clientCredentialType;
ProtectionLevel protectionLevel;
ExtendedProtectionPolicy extendedProtectionPolicy;
SslProtocols sslProtocols;
public TcpTransportSecurity()
{
this.clientCredentialType = DefaultClientCredentialType;
this.protectionLevel = DefaultProtectionLevel;
this.extendedProtectionPolicy = ChannelBindingUtility.DefaultPolicy;
this.sslProtocols = TransportDefaults.SslProtocols;
}
[DefaultValue(DefaultClientCredentialType)]
public TcpClientCredentialType ClientCredentialType
{
get { return this.clientCredentialType; }
set
{
if (!TcpClientCredentialTypeHelper.IsDefined(value))
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new ArgumentOutOfRangeException("value"));
}
this.clientCredentialType = value;
}
}
[DefaultValue(DefaultProtectionLevel)]
public ProtectionLevel ProtectionLevel
{
get { return this.protectionLevel; }
set
{
if (!ProtectionLevelHelper.IsDefined(value))
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new ArgumentOutOfRangeException("value"));
}
this.protectionLevel = value;
}
}
public ExtendedProtectionPolicy ExtendedProtectionPolicy
{
get
{
return this.extendedProtectionPolicy;
}
set
{
if (value == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("value");
}
if (value.PolicyEnforcement == PolicyEnforcement.Always &&
!System.Security.Authentication.ExtendedProtection.ExtendedProtectionPolicy.OSSupportsExtendedProtection)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(
new PlatformNotSupportedException(SR.GetString(SR.ExtendedProtectionNotSupported)));
}
this.extendedProtectionPolicy = value;
}
}
[DefaultValue(TransportDefaults.SslProtocols)]
public SslProtocols SslProtocols
{
get { return this.sslProtocols; }
set
{
SslProtocolsHelper.Validate(value);
this.sslProtocols = value;
}
}
SslStreamSecurityBindingElement CreateSslBindingElement(bool requireClientCertificate)
{
if (this.protectionLevel != ProtectionLevel.EncryptAndSign)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new InvalidOperationException(SR.GetString(
SR.UnsupportedSslProtectionLevel, this.protectionLevel)));
}
SslStreamSecurityBindingElement result = new SslStreamSecurityBindingElement();
result.RequireClientCertificate = requireClientCertificate;
result.SslProtocols = sslProtocols;
return result;
}
static bool IsSslBindingElement(BindingElement element, TcpTransportSecurity transportSecurity, out bool requireClientCertificate, out SslProtocols sslProtocols)
{
requireClientCertificate = false;
sslProtocols = TransportDefaults.SslProtocols;
SslStreamSecurityBindingElement ssl = element as SslStreamSecurityBindingElement;
if (ssl == null)
return false;
transportSecurity.ProtectionLevel = ProtectionLevel.EncryptAndSign;
requireClientCertificate = ssl.RequireClientCertificate;
sslProtocols = ssl.SslProtocols;
return true;
}
internal BindingElement CreateTransportProtectionOnly()
{
return this.CreateSslBindingElement(false);
}
internal static bool SetTransportProtectionOnly(BindingElement transport, TcpTransportSecurity transportSecurity)
{
bool requireClientCertificate;
SslProtocols sslProtocols;
return IsSslBindingElement(transport, transportSecurity, out requireClientCertificate, out sslProtocols);
}
internal BindingElement CreateTransportProtectionAndAuthentication()
{
if (this.clientCredentialType == TcpClientCredentialType.Certificate || this.clientCredentialType == TcpClientCredentialType.None)
{
return this.CreateSslBindingElement(this.clientCredentialType == TcpClientCredentialType.Certificate);
}
else
{
WindowsStreamSecurityBindingElement result = new WindowsStreamSecurityBindingElement();
result.ProtectionLevel = this.protectionLevel;
return result;
}
}
internal static bool SetTransportProtectionAndAuthentication(BindingElement transport, TcpTransportSecurity transportSecurity)
{
bool requireClientCertificate = false;
SslProtocols sslProtocols = TransportDefaults.SslProtocols;
if (transport is WindowsStreamSecurityBindingElement)
{
transportSecurity.ClientCredentialType = TcpClientCredentialType.Windows;
transportSecurity.ProtectionLevel = ((WindowsStreamSecurityBindingElement)transport).ProtectionLevel;
return true;
}
else if (IsSslBindingElement(transport, transportSecurity, out requireClientCertificate, out sslProtocols))
{
transportSecurity.ClientCredentialType = requireClientCertificate ? TcpClientCredentialType.Certificate : TcpClientCredentialType.None;
transportSecurity.SslProtocols = sslProtocols;
return true;
}
return false;
}
internal bool InternalShouldSerialize()
{
return this.ClientCredentialType != TcpTransportSecurity.DefaultClientCredentialType
|| this.ProtectionLevel != TcpTransportSecurity.DefaultProtectionLevel
|| this.SslProtocols != TransportDefaults.SslProtocols
|| ShouldSerializeExtendedProtectionPolicy();
}
[EditorBrowsable(EditorBrowsableState.Never)]
public bool ShouldSerializeExtendedProtectionPolicy()
{
return !ChannelBindingUtility.AreEqual(this.ExtendedProtectionPolicy, ChannelBindingUtility.DefaultPolicy);
}
}
}
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