Run PowerShell-Script from C# Application

Question

I\'m trying to execute a PowerShell script from a c# application. The script has to be executed under a special usercontext.

I\'ve tried different scenarios some are

Answer 1

Have you tried Set-ExecutionPolicy Unrestricted

using ( new Impersonator( "myUsername", "myDomainname", "myPassword" ) ) 
{ 
    using (RunspaceInvoke invoker = new RunspaceInvoke()) 
    { 
        invoker.Invoke("Set-ExecutionPolicy Unrestricted"); 
    } 
} 

Edit:

Found this little gem... http://www.codeproject.com/Articles/10090/A-small-C-Class-for-impersonating-a-User

namespace Tools
{
    #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
    }

    /////////////////////////////////////////////////////////////////////////
}

Answer 2

Several PowerShell cmddlets take a PSCredential object to run using a particular user account. May have a look at this article - http://letitknow.wordpress.com/2011/06/20/run-powershell-script-using-another-account/

Here's how you can create the Credential object containing the username and password you want to use:

$username = 'domain\user'
$password = 'something'
$cred = New-Object System.Management.Automation.PSCredential -ArgumentList @($username,(ConvertTo-SecureString -String $password -AsPlainText -Force))

Once you have the password ready for use in a credential object, you can do a number of things, such as call Start-Process to launch PowerShell.exe, specifying the credential in the -Credential parameter, or Invoke-Command to invoke a "remote" command locally, specifying the credential in the -Credential parameter, or you could call Start-Job to do the work as a background job, passing the credentials you want into the -Credential parameter.

See here , here & in msdn for more information

Answer 3

I just spent the day fixing this for myself.

I finally was able to make it work by adding -Scope Process to Set-ExecutionPolicy

invoker.Invoke("Set-ExecutionPolicy Unrestricted -Scope Process");