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pdupont@enerkem.com 8/2/2017 10:49:58 AM

eConnect (impersonation of a user)

Hi!

I have a small problem retreiving a Sales_Transaction in Dynamics GP. If I use the current user (my user, without impersonation) it is working. But if I do an impersonation with my user, it is not working...

Want to know if someone could help me with this!

Have a nice day!!

-Patrick.


Here is my C# code below, and after I put the impersonate class :


***********************************************************************************************************************************
public taSopHdrIvcInsert GetSalesTransaction(string transactionNumber)
{
taSopHdrIvcInsert returnValue = null;
eConnectMethods eConnectObject;
eConnectOut myRequest;
RQeConnectOutType[] eConnectOutType;
eConnectType eConnectDoc;
System.IO.MemoryStream memStream;
System.Xml.Serialization.XmlSerializer serializer;
System.Xml.XmlDocument myDoc;
string salesOrderEntityString;
System.IO.StringReader requestReader;
System.Xml.XmlTextReader xmlTextReader;
string salesorderXml;
System.IO.StringReader salesorderReader;
System.Xml.Serialization.XmlSerializer deSerializer;

try
{
using (Impersonator imp = new Impersonator("MyUserName", "MyDomain", "MyPassword"))
{
//set the requester to retreive a sales order
myRequest = new eConnectOut();
myRequest.DOCTYPE = "Sales_Transaction";
myRequest.OUTPUTTYPE = 1;
myRequest.INDEX1FROM = transactionNumber;
myRequest.INDEX1TO = transactionNumber;
myRequest.FORLIST = 1;
//myRequest.WhereClause = "CUSTNMBR = '" + customerNumber + "'";

//create the eConnect requester XML document object
eConnectOutType = new RQeConnectOutType[1] { new RQeConnectOutType() };
eConnectOutType[0].eConnectOut = myRequest;
eConnectDoc = new eConnectType();
eConnectDoc.RQeConnectOutType = eConnectOutType;

//serialize the object to produce an XML document
memStream = new System.IO.MemoryStream();
serializer = new System.Xml.Serialization.XmlSerializer(typeof(eConnectType));
serializer.Serialize(memStream, eConnectDoc);
memStream.Position = 0;
myDoc = new System.Xml.XmlDocument();
myDoc.Load(memStream);

//get the sales order entity
eConnectObject = new eConnectMethods();
salesOrderEntityString = eConnectObject.GetEntity(_connectionString, myDoc.OuterXml);

//load the xml document string into a StringReader
requestReader = new System.IO.StringReader(salesOrderEntityString);

//use the StringReader to populate an XML text reader
xmlTextReader = new System.Xml.XmlTextReader(requestReader);

//use the XML text reader to find the sales order XML in the eConnect Requester response document
//the eConnect_Out_Setup table shows that the sales order XML data will be enclosed in <SO_Trans> tags
xmlTextReader.ReadToFollowing("SO_Trans");
salesorderXml = xmlTextReader.ReadInnerXml();
salesorderXml = string.Concat("<?xml version=\"1.0\"?><taSopHdrIvcInsert>", salesorderXml, "</taSopHdrIvcInsert>");
salesorderReader = new System.IO.StringReader(salesorderXml);

//deserialize the XML node from the StringReader
deSerializer = new System.Xml.Serialization.XmlSerializer(typeof(taSopHdrIvcInsert));

//cast the deserialized object to a taSopHdrIvcInsert serialization object
returnValue = (taSopHdrIvcInsert)deSerializer.Deserialize(salesorderReader);
}
}
catch (Exception ex)
{
MessageBox.Show(ex.Message, "Error:eConnectEnerkemGP.GetSalesTransaction()", MessageBoxButtons.OK, MessageBoxIcon.Error);
}

return returnValue;
}

***********************************************************************************************************************************
namespace MyNameSpace
{
    #region Using directives.
    // ----------------------------------------------------------------------

    using System;
    using System.Security.Principal;
    using System.Runtime.InteropServices;
    using System.ComponentModel;

    // ----------------------------------------------------------------------
    #endregion

    /////////////////////////////////////////////////////////////////////////

    /// <summary>
    /// Impersonation of a user. Allows to execute code under another
    /// user context.
    /// Please note that the account that instantiates the Impersonator class
    /// needs to have the 'Act as part of operating system' privilege set.
    /// </summary>
    /// <remarks>
    /// This class is based on the information in the Microsoft knowledge base
    /// article http://support.microsoft.com/default.aspx?scid=kb;en-us;Q306158
    /// 
    /// Encapsulate an instance into a using-directive like e.g.:
    /// 
    /// ...
    /// using ( new Impersonator( "myUsername", "myDomainname", "myPassword" ) )
    /// {
    /// ...
    /// [code that executes under the new context]
    /// ...
    /// }
    /// ...
    /// 
    /// Please contact the author Uwe Keim (mailto:uwe.keim@zeta-software.de)
    /// for questions regarding this class.
    /// </remarks>
    public class Impersonator :
        IDisposable
    {
        #region Public methods.
        // ------------------------------------------------------------------

        /// <summary>
        /// Constructor. Starts the impersonation with the given credentials.
        /// Please note that the account that instantiates the Impersonator class
        /// needs to have the 'Act as part of operating system' privilege set.
        /// </summary>
        /// <param name="userName">The name of the user to act as.</param>
        /// <param name="domainName">The domain name of the user to act as.</param>
        /// <param name="password">The password of the user to act as.</param>
        public Impersonator(
            string userName,
            string domainName,
            string password)
        {
            ImpersonateValidUser(userName, domainName, password);
        }

        // ------------------------------------------------------------------
        #endregion

        #region IDisposable member.
        // ------------------------------------------------------------------

        public void Dispose()
        {
            UndoImpersonation();
        }

        // ------------------------------------------------------------------
        #endregion

        #region P/Invoke.
        // ------------------------------------------------------------------

        [DllImport("advapi32.dll", SetLastError = true)]
        private static extern int LogonUser(
            string lpszUserName,
            string lpszDomain,
            string lpszPassword,
            int dwLogonType,
            int dwLogonProvider,
            ref IntPtr phToken);

        [DllImport("advapi32.dll", CharSet = CharSet.Auto, SetLastError = true)]
        private static extern int DuplicateToken(
            IntPtr hToken,
            int impersonationLevel,
            ref IntPtr hNewToken);

        [DllImport("advapi32.dll", CharSet = CharSet.Auto, SetLastError = true)]
        private static extern bool RevertToSelf();

        [DllImport("kernel32.dll", CharSet = CharSet.Auto)]
        private static extern bool CloseHandle(
            IntPtr handle);

        private const int LOGON32_LOGON_INTERACTIVE = 2;
        private const int LOGON32_PROVIDER_DEFAULT = 0;

        // ------------------------------------------------------------------
        #endregion

        #region Private member.
        // ------------------------------------------------------------------

        /// <summary>
        /// Does the actual impersonation.
        /// </summary>
        /// <param name="userName">The name of the user to act as.</param>
        /// <param name="domainName">The domain name of the user to act as.</param>
        /// <param name="password">The password of the user to act as.</param>
        private void ImpersonateValidUser(
            string userName,
            string domain,
            string password)
        {
            WindowsIdentity tempWindowsIdentity = null;
            IntPtr token = IntPtr.Zero;
            IntPtr tokenDuplicate = IntPtr.Zero;

            try
            {
                if (RevertToSelf())
                {
                    if (LogonUser(
                        userName,
                        domain,
                        password,
                        LOGON32_LOGON_INTERACTIVE,
                        LOGON32_PROVIDER_DEFAULT,
                        ref token) != 0)
                    {
                        if (DuplicateToken(token, 2, ref tokenDuplicate) != 0)
                        {
                            tempWindowsIdentity = new WindowsIdentity(tokenDuplicate);
                            impersonationContext = tempWindowsIdentity.Impersonate();
                        }
                        else
                        {
                            throw new Win32Exception(Marshal.GetLastWin32Error());
                        }
                    }
                    else
                    {
                        throw new Win32Exception(Marshal.GetLastWin32Error());
                    }
                }
                else
                {
                    throw new Win32Exception(Marshal.GetLastWin32Error());
                }
            }
            finally
            {
                if (token != IntPtr.Zero)
                {
                    CloseHandle(token);
                }
                if (tokenDuplicate != IntPtr.Zero)
                {
                    CloseHandle(tokenDuplicate);
                }
            }
        }

        /// <summary>
        /// Reverts the impersonation.
        /// </summary>
        private void UndoImpersonation()
        {
            if (impersonationContext != null)
            {
                impersonationContext.Undo();
            }
        }

        private WindowsImpersonationContext impersonationContext = null;

        // ------------------------------------------------------------------
        #endregion
    }

    /////////////////////////////////////////////////////////////////////////
}
Version: GP 2015
Section: .NET Development, Dynamics GP, eConnect