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//----------------------------------------------------------
// Copyright (c) Microsoft Corporation. All rights reserved.
//------------------------------------------------------------
namespace System.ServiceModel
{
using System;
using System.ComponentModel;
using System.Diagnostics;
using System.IdentityModel.Claims;
using System.Runtime;
using System.Runtime.InteropServices;
using System.Security.Principal;
using System.ServiceModel.ComIntegration;
using System.ServiceModel.Diagnostics;
using System.Text;
using System.Xml;
public class UpnEndpointIdentity : EndpointIdentity
{
SecurityIdentifier upnSid;
bool hasUpnSidBeenComputed;
WindowsIdentity windowsIdentity;
Object thisLock = new Object();
public UpnEndpointIdentity(string upnName)
{
if (upnName == null)
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("upnName");
base.Initialize(Claim.CreateUpnClaim(upnName));
this.hasUpnSidBeenComputed = false;
}
public UpnEndpointIdentity(Claim identity)
{
if (identity == null)
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("identity");
// PreSharp Bug: Parameter 'identity.ResourceType' to this public method must be validated: A null-dereference can occur here.
#pragma warning suppress 56506 // Claim.ResourceType will never return null
if (!identity.ClaimType.Equals(ClaimTypes.Upn))
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgument(SR.GetString(SR.UnrecognizedClaimTypeForIdentity, identity.ClaimType, ClaimTypes.Upn));
base.Initialize(identity);
}
internal UpnEndpointIdentity(WindowsIdentity windowsIdentity)
{
if (windowsIdentity == null)
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("windowsIdentity");
this.windowsIdentity = windowsIdentity;
this.upnSid = windowsIdentity.User;
this.hasUpnSidBeenComputed = true;
}
internal override void EnsureIdentityClaim()
{
if (this.windowsIdentity != null)
{
lock (thisLock)
{
if (this.windowsIdentity != null)
{
base.Initialize(Claim.CreateUpnClaim(GetUpnFromWindowsIdentity(this.windowsIdentity)));
this.windowsIdentity.Dispose();
this.windowsIdentity = null;
}
}
}
}
string GetUpnFromWindowsIdentity(WindowsIdentity windowsIdentity)
{
string downlevelName = null;
string upnName = null;
try
{
downlevelName = windowsIdentity.Name;
if (this.IsMachineJoinedToDomain())
{
upnName = GetUpnFromDownlevelName(downlevelName);
}
}
#pragma warning suppress 56500 // covered by FxCOP
catch (Exception e)
{
if (Fx.IsFatal(e))
{
throw;
}
DiagnosticUtility.TraceHandledException(e, TraceEventType.Warning);
}
// if the AD cannot be queried for the fully qualified domain name,
// fall back to the downlevel UPN name
return upnName ?? downlevelName;
}
bool IsMachineJoinedToDomain()
{
IntPtr pDomainControllerInfo = IntPtr.Zero;
try
{
int result = SafeNativeMethods.DsGetDcName(null, null, IntPtr.Zero, null, (uint)DSFlags.DS_DIRECTORY_SERVICE_REQUIRED, out pDomainControllerInfo);
return result != (int)Win32Error.ERROR_NO_SUCH_DOMAIN;
}
finally
{
if (pDomainControllerInfo != IntPtr.Zero)
{
SafeNativeMethods.NetApiBufferFree(pDomainControllerInfo);
}
}
}
// Duplicate code from SecurityImpersonationBehavior
string GetUpnFromDownlevelName(string downlevelName)
{
if (downlevelName == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("downlevelName");
}
int delimiterPos = downlevelName.IndexOf('\\');
if ((delimiterPos < 0) || (delimiterPos == 0) || (delimiterPos == downlevelName.Length - 1))
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperWarning(new InvalidOperationException(SR.GetString(SR.DownlevelNameCannotMapToUpn, downlevelName)));
}
string shortDomainName = downlevelName.Substring(0, delimiterPos + 1);
string userName = downlevelName.Substring(delimiterPos + 1);
string fullDomainName;
uint capacity = 50;
StringBuilder fullyQualifiedDomainName = new StringBuilder((int)capacity);
if (!SafeNativeMethods.TranslateName(shortDomainName, EXTENDED_NAME_FORMAT.NameSamCompatible, EXTENDED_NAME_FORMAT.NameCanonical,
fullyQualifiedDomainName, out capacity))
{
int errorCode = Marshal.GetLastWin32Error();
if (errorCode == (int)Win32Error.ERROR_INSUFFICIENT_BUFFER)
{
fullyQualifiedDomainName = new StringBuilder((int)capacity);
if (!SafeNativeMethods.TranslateName(shortDomainName, EXTENDED_NAME_FORMAT.NameSamCompatible, EXTENDED_NAME_FORMAT.NameCanonical,
fullyQualifiedDomainName, out capacity))
{
errorCode = Marshal.GetLastWin32Error();
throw DiagnosticUtility.ExceptionUtility.ThrowHelperWarning(new Win32Exception(errorCode));
}
}
else
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperWarning(new Win32Exception(errorCode));
}
}
// trim the trailing / from fqdn
fullyQualifiedDomainName = fullyQualifiedDomainName.Remove(fullyQualifiedDomainName.Length - 1, 1);
fullDomainName = fullyQualifiedDomainName.ToString();
return userName + "@" + fullDomainName;
}
internal override void WriteContentsTo(XmlDictionaryWriter writer)
{
if (writer == null)
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("writer");
writer.WriteElementString(XD.AddressingDictionary.Upn, XD.AddressingDictionary.IdentityExtensionNamespace, (string)this.IdentityClaim.Resource);
}
internal SecurityIdentifier GetUpnSid()
{
Fx.Assert(ClaimTypes.Upn.Equals(this.IdentityClaim.ClaimType), "");
if (!hasUpnSidBeenComputed)
{
lock (thisLock)
{
string upn = (string)this.IdentityClaim.Resource;
if (!hasUpnSidBeenComputed)
{
try
{
NTAccount userAccount = new NTAccount(upn);
this.upnSid = userAccount.Translate(typeof(SecurityIdentifier)) as SecurityIdentifier;
}
#pragma warning suppress 56500 // covered by FxCOP
catch (Exception e)
{
// Always immediately rethrow fatal exceptions.
if (Fx.IsFatal(e))
{
throw;
}
if (e is NullReferenceException)
{
throw;
}
SecurityTraceRecordHelper.TraceSpnToSidMappingFailure(upn, e);
}
finally
{
hasUpnSidBeenComputed = true;
}
}
}
}
return this.upnSid;
}
}
}
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