How do i download document from EMC DOCUMENTUM D2 into my C# code while using Kerberos authentication? - kerberos

Question

My C# application is deployed in Sharepoint and i want to download a document from EMC DOCUMENTUM D2 in C# and upload the same in Sharepoint Document library.
I am using kerberos authentication for single sign on.Kerberos works fine when i search for documents however when i try download document from D2 somehow the service account is being used by the code to download the document(I know it uses service account when i see the incoming traffic log of the Documentum).
IObjectService objectService = this.GetRemoteServiceDownload<IObjectService>(moduleName);
The defination of the function.
protected IObjectService GetRemoteServiceDownload<IObjectService>(string serviceModule)
{
KerberosTokenHandler handler = new KerberosTokenHandler();
try
{
using (KerberosClientContext kerberosClientContext = new KerberosClientContext(servicePrincipalName, true, ImpersonationLevel.Delegation))
{
try
{
KerberosBinarySecurityToken token = new KerberosBinarySecurityToken(kerberosClientContext.InitializeContext(), KerberosValueType.KERBEROSV5_AP_REQ);
handler.SetBinarySecurityToken(token);
List<IEndpointBehavior> handlers = new List<IEndpointBehavior>();
handlers.Add(handler);
handlers.Add(new DFSBindingBehaviour(0, 10, 0, 0, 10, 0, 40960, 32, 16384, 16384, 20000000));
var remoteService = ServiceFactory.Instance.GetRemoteService<IObjectService>(serviceContext, serviceModule, address, handlers);
return remoteService;
}
catch (Exception ex)
{
Service.LoggerService.SetError(new Exception("In GetRemoteService" + ex.Message, ex));
return default(IObjectService);
}
}
}
catch (Exception ex)
{
Service.LoggerService.SetError(new Exception("In GetRemoteService using" + ex.Message, ex));
return default(IObjectService);
}
}

Answer 1

Guys i was able to solve the problem!.
It was not a kerberos issue actually it was a issue of the location of the calling function.
The function that initiated the Kerberos Authentication was within
using(SPSecurity.RunWithElevatedPrivileges )
{
}
Because of this the Kerberos authentication was making use of the service account to download the document.