Saturday, July 17, 2010

Executing SSIS (Sql server integration service) package the right way.

Their are differnet ways to execute the SQL Server integration service(SSIS) package.
This is needed each time when we need to execute the SSIS package, out of process using EXE or Window's Service.

Their may be many reasons to set your packages to execute as Batch cycle.
one of the way is to execute the package through Windows Service.
WindowsService[Scheduler]--> Master Packages --> Child Package

But the biggeset problem is authentication failure when you get to execute your package from .net app.

Impersonation does not happens correctly. which means if you try executing your package with Domain\serviceaccount but it try executing as Anonymous account. how to trick that and how to properly execute the SSIS package from .net application?


Here is the Code:-

Namespace taht you will need..

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



Create a Class which handels most of you initial getter setters.

class MYSSISProgram
{

[StructLayout(LayoutKind.Sequential)]
public struct STARTUPINFO
{
public int cb;
public String lpReserved;
public String lpDesktop;
public String lpTitle;
public uint dwX;
public uint dwY;
public uint dwXSize;
public uint dwYSize;
public uint dwXCountChars;
public uint dwYCountChars;
public uint dwFillAttribute;
public uint dwFlags;
public short wShowWindow;
public short cbReserved2;
public IntPtr lpReserved2;
public IntPtr hStdInput;
public IntPtr hStdOutput;
public IntPtr hStdError;
}

[StructLayout(LayoutKind.Sequential)]
public struct PROCESS_INFORMATION
{
public IntPtr hProcess;
public IntPtr hThread;
public uint dwProcessId;
public uint dwThreadId;
}

[StructLayout(LayoutKind.Sequential)]
public struct SECURITY_ATTRIBUTES
{
public int Length;
public IntPtr lpSecurityDescriptor;
public bool bInheritHandle;
}

[DllImport("kernel32.dll", EntryPoint = "CloseHandle", SetLastError = true, CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall)]
public extern static bool CloseHandle(IntPtr handle);

[DllImport("advapi32.dll", EntryPoint = "CreateProcessAsUser", SetLastError = true, CharSet = CharSet.Ansi, CallingConvention = CallingConvention.StdCall)]
public extern static bool CreateProcessAsUser(IntPtr hToken, String lpApplicationName, String lpCommandLine, ref SECURITY_ATTRIBUTES lpProcessAttributes,
ref SECURITY_ATTRIBUTES lpThreadAttributes, bool bInheritHandle, int dwCreationFlags, IntPtr lpEnvironment,
String lpCurrentDirectory, ref STARTUPINFO lpStartupInfo, out PROCESS_INFORMATION lpProcessInformation);

[DllImport("advapi32.dll", EntryPoint = "DuplicateTokenEx")]
public extern static bool DuplicateTokenEx(IntPtr ExistingTokenHandle, uint dwDesiredAccess,
ref SECURITY_ATTRIBUTES lpThreadAttributes, int TokenType,
int ImpersonationLevel, ref IntPtr DuplicateTokenHandle);




static void Main(string[] args)
{


System.Console.Write(Executeapplication("Your Dtexec Path usually its c:\\programm files\dtexec.exe" + " ", "/f " + "Full path of Package " + \Package Name including the extension + " /DECRYPT " + Set the SSIS package password + " " + Package Variable in Key value format;


Eg:-
Executeapplication(+ " /DECRYPT " + "xyz" + " /SET \\package.Variables[User::test1].Value;\"testingCheck\"");

System.Console.ReadLine();
}






//The method to execute your package which will transfer your nt identity correctly till the next leval.




public static string Executeapplication(string Executable,string ParaMeter)
{
System.Configuration.AppSettingsReader reader = new AppSettingsReader();
string strResult = "";
IntPtr Token = new IntPtr(0);
IntPtr DupedToken = new IntPtr(0);
bool ret;
strResult += WindowsIdentity.GetCurrent().Name.ToString();


SECURITY_ATTRIBUTES sa = new SECURITY_ATTRIBUTES();
sa.bInheritHandle = false;
sa.Length = Marshal.SizeOf(sa);
sa.lpSecurityDescriptor = (IntPtr)0;

Token = WindowsIdentity.GetCurrent().Token;

const uint GENERIC_ALL = 0x10000000;

const int SecurityImpersonation = 2;
const int TokenType = 1;

ret = DuplicateTokenEx(Token, GENERIC_ALL, ref sa, SecurityImpersonation, TokenType, ref DupedToken);

if (ret == false)
strResult += "DuplicateTokenEx failed with " + Marshal.GetLastWin32Error();

else
strResult += "DuplicateTokenEx SUCCESS";

STARTUPINFO si = new STARTUPINFO();
si.cb = Marshal.SizeOf(si);
si.lpDesktop = "";

string commandLinePath;
commandLinePath = Executable + ParaMeter;
if (reader.GetValue("debug", System.Type.GetType("System.String")).ToString() == "true")
{
System.Console.WriteLine(commandLinePath);
System.Console.ReadLine();
}
PROCESS_INFORMATION pi = new PROCESS_INFORMATION();
ret = CreateProcessAsUser(DupedToken, null, commandLinePath, ref sa, ref sa, false, 0, (IntPtr)0, "c:\\", ref si, out pi);

if (ret == false)
strResult += "CreateProcessAsUser failed with " + Marshal.GetLastWin32Error();
else
{
strResult += "CreateProcessAsUser SUCCESS. The child PID is" + pi.dwProcessId;

CloseHandle(pi.hProcess);
CloseHandle(pi.hThread);
}

ret = CloseHandle(DupedToken);
if (ret == false)
strResult += Marshal.GetLastWin32Error();
else
strResult += "CloseHandle SUCCESS";

return strResult;


}



}





}

// You may need to implement locking mechanism further which I will discuss later on..

Enjoy :)
Anjani Kumar

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