Access File Share from ASP.NET using Unmanaged Code


M

Mark Duregon

Hi,

We have an application that requires appropriate users to run command files on an adhoc basis. We have implmented a library that uses the following code:

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

namespace SAMIS.Porteco.Utilities
{
public enum LogonType : int
{
LOGON32_LOGON_INTERACTIVE = 2,
LOGON32_LOGON_NETWORK = 3,
LOGON32_LOGON_BATCH = 4,
LOGON32_LOGON_SERVICE = 5,
LOGON32_LOGON_UNLOCK = 7,
LOGON32_LOGON_NETWORK_CLEARTEXT = 8, // Only for Win2K or higher
LOGON32_LOGON_NEW_CREDENTIALS = 9 // Only for Win2K or higher
};

public enum LogonProvider : int
{
LOGON32_PROVIDER_DEFAULT = 0,
LOGON32_PROVIDER_WINNT35 = 1,
LOGON32_PROVIDER_WINNT40 = 2,
LOGON32_PROVIDER_WINNT50 = 3
};

class SecuUtil32
{
[DllImport("advapi32.dll", SetLastError=true)]
public static extern bool LogonUser(String lpszUsername, String lpszDomain, String lpszPassword,
int dwLogonType, int dwLogonProvider, ref IntPtr TokenHandle);

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

[DllImport("advapi32.dll", CharSet=CharSet.Auto, SetLastError=true)]
public extern static bool DuplicateToken(IntPtr ExistingTokenHandle,
int SECURITY_IMPERSONATION_LEVEL, ref IntPtr DuplicateTokenHandle);
}

/// <summary>
/// Summary description for NetworkSecurity.
/// </summary>
public class NetworkSecurity
{
private NetworkSecurity() {}

public static WindowsImpersonationContext ImpersonateUser(string domain, string login, string password,
LogonType logonType, LogonProvider logonProvider)
{
IntPtr tokenHandle = new IntPtr(0);
IntPtr dupeTokenHandle = new IntPtr(0);
try
{
const int SecurityImpersonation = 2;

tokenHandle = IntPtr.Zero;
dupeTokenHandle = IntPtr.Zero;

//
// Call LogonUser to obtain a handle to an access token.
//
bool returnValue = SecuUtil32.LogonUser(login, domain, password, (int)logonType,
(int)logonProvider, ref tokenHandle);

if (false == returnValue)
{
int ret = Marshal.GetLastWin32Error();
string strErr = String.Format("LogonUser failed with error code : {0}", ret);
throw new ApplicationException(strErr, null);
}

bool retVal = SecuUtil32.DuplicateToken(tokenHandle, SecurityImpersonation, ref dupeTokenHandle);

if (false == retVal)
{
SecuUtil32.CloseHandle(tokenHandle);
throw new ApplicationException("Failed to duplicate token", null);
}

//
// The token that is passed to the following constructor must
// be a primary token in order to use it for impersonation.
//
WindowsIdentity newId = new WindowsIdentity(dupeTokenHandle);
WindowsImpersonationContext impersonatedUser = newId.Impersonate();

return impersonatedUser;
}
catch (Exception ex)
{
throw new ApplicationException(ex.Message, ex);
}

return null;
}
}
}

The problem we are having is that while network resources are not restricted entirely because the batch files are able to run sql scripts against the Oracle database, FTP etc. but the user cannot access a network share either by unc path or trying to map a drive as part of the script. This problem only occurs when trying to run the script in this fashion as it works when run manually through a command prompt whic is expected, an also on a scheduled basis by the Windows Scheduler.

Is their a permission I need to request/grant on the assembly and if so which assembly (the library/web or both). I have tried granting full trust to the assemblies without success.

Alternatively is their a way to run a defined task from the scheduler. I read the documentation (all 2 lines of it) for the scheduler and did not get the impression that it is possible.

Regards,
Mark.

P.S. I cannot give you an exception or error messages that occur when I try to run the task from the web application, because as soon as I try to access a network resource using the page I have created it simply hangs/timesout but works perfectly when dealing with only local file resources. FYI all command files are on the local machine but need to access network shares to ctp then delete files.

Platform: Windows 2000 Server w/ 1.0 Framework
 
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D

David Coe, MCAD

Do you have impersonation enabled in your web.config file, and Windows authentication setup in IIS?

Mark Duregon said:
Hi,

We have an application that requires appropriate users to run command files on an adhoc basis. We have implmented a library that uses the following code:

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

namespace SAMIS.Porteco.Utilities
{
public enum LogonType : int
{
LOGON32_LOGON_INTERACTIVE = 2,
LOGON32_LOGON_NETWORK = 3,
LOGON32_LOGON_BATCH = 4,
LOGON32_LOGON_SERVICE = 5,
LOGON32_LOGON_UNLOCK = 7,
LOGON32_LOGON_NETWORK_CLEARTEXT = 8, // Only for Win2K or higher
LOGON32_LOGON_NEW_CREDENTIALS = 9 // Only for Win2K or higher
};

public enum LogonProvider : int
{
LOGON32_PROVIDER_DEFAULT = 0,
LOGON32_PROVIDER_WINNT35 = 1,
LOGON32_PROVIDER_WINNT40 = 2,
LOGON32_PROVIDER_WINNT50 = 3
};

class SecuUtil32
{
[DllImport("advapi32.dll", SetLastError=true)]
public static extern bool LogonUser(String lpszUsername, String lpszDomain, String lpszPassword,
int dwLogonType, int dwLogonProvider, ref IntPtr TokenHandle);

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

[DllImport("advapi32.dll", CharSet=CharSet.Auto, SetLastError=true)]
public extern static bool DuplicateToken(IntPtr ExistingTokenHandle,
int SECURITY_IMPERSONATION_LEVEL, ref IntPtr DuplicateTokenHandle);
}

/// <summary>
/// Summary description for NetworkSecurity.
/// </summary>
public class NetworkSecurity
{
private NetworkSecurity() {}

public static WindowsImpersonationContext ImpersonateUser(string domain, string login, string password,
LogonType logonType, LogonProvider logonProvider)
{
IntPtr tokenHandle = new IntPtr(0);
IntPtr dupeTokenHandle = new IntPtr(0);
try
{
const int SecurityImpersonation = 2;

tokenHandle = IntPtr.Zero;
dupeTokenHandle = IntPtr.Zero;

//
// Call LogonUser to obtain a handle to an access token.
//
bool returnValue = SecuUtil32.LogonUser(login, domain, password, (int)logonType,
(int)logonProvider, ref tokenHandle);

if (false == returnValue)
{
int ret = Marshal.GetLastWin32Error();
string strErr = String.Format("LogonUser failed with error code : {0}", ret);
throw new ApplicationException(strErr, null);
}

bool retVal = SecuUtil32.DuplicateToken(tokenHandle, SecurityImpersonation, ref dupeTokenHandle);

if (false == retVal)
{
SecuUtil32.CloseHandle(tokenHandle);
throw new ApplicationException("Failed to duplicate token", null);
}

//
// The token that is passed to the following constructor must
// be a primary token in order to use it for impersonation.
//
WindowsIdentity newId = new WindowsIdentity(dupeTokenHandle);
WindowsImpersonationContext impersonatedUser = newId.Impersonate();

return impersonatedUser;
}
catch (Exception ex)
{
throw new ApplicationException(ex.Message, ex);
}

return null;
}
}
}

The problem we are having is that while network resources are not restricted entirely because the batch files are able to run sql scripts against the Oracle database, FTP etc. but the user cannot access a network share either by unc path or trying to map a drive as part of the script. This problem only occurs when trying to run the script in this fashion as it works when run manually through a command prompt whic is expected, an also on a scheduled basis by the Windows Scheduler.

Is their a permission I need to request/grant on the assembly and if so which assembly (the library/web or both). I have tried granting full trust to the assemblies without success.

Alternatively is their a way to run a defined task from the scheduler. I read the documentation (all 2 lines of it) for the scheduler and did not get the impression that it is possible.

Regards,
Mark.

P.S. I cannot give you an exception or error messages that occur when I try to run the task from the web application, because as soon as I try to access a network resource using the page I have created it simply hangs/timesout but works perfectly when dealing with only local file resources. FYI all command files are on the local machine but need to access network shares to ctp then delete files.

Platform: Windows 2000 Server w/ 1.0 Framework
 
M

Mark Duregon

We use Forms authentication and if I set impersonate to true then I get an Access Denied excpetion when trying to access our Business Facade layer:

Access is denied: 'BusinessFacade'.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.IO.FileLoadException: Access is denied: 'BusinessFacade'.

Source Error:

An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.

Stack Trace:


[FileLoadException: Access is denied: 'BusinessFacade'.]
SAMIS.Porteco.Web.Global.Application_AuthenticateRequest(Object sender, EventArgs e) +0
System.Web.SyncEventExecutionStep.Execute() +60
System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +87




--------------------------------------------------------------------------------
Version Information: Microsoft .NET Framework Version:1.0.3705.288; ASP.NET Version:1.0.3705.288



David Coe said:
Do you have impersonation enabled in your web.config file, and Windows authentication setup in IIS?

Mark Duregon said:
Hi,

We have an application that requires appropriate users to run command files on an adhoc basis. We have implmented a library that uses the following code:

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

namespace SAMIS.Porteco.Utilities
{
public enum LogonType : int
{
LOGON32_LOGON_INTERACTIVE = 2,
LOGON32_LOGON_NETWORK = 3,
LOGON32_LOGON_BATCH = 4,
LOGON32_LOGON_SERVICE = 5,
LOGON32_LOGON_UNLOCK = 7,
LOGON32_LOGON_NETWORK_CLEARTEXT = 8, // Only for Win2K or higher
LOGON32_LOGON_NEW_CREDENTIALS = 9 // Only for Win2K or higher
};

public enum LogonProvider : int
{
LOGON32_PROVIDER_DEFAULT = 0,
LOGON32_PROVIDER_WINNT35 = 1,
LOGON32_PROVIDER_WINNT40 = 2,
LOGON32_PROVIDER_WINNT50 = 3
};

class SecuUtil32
{
[DllImport("advapi32.dll", SetLastError=true)]
public static extern bool LogonUser(String lpszUsername, String lpszDomain, String lpszPassword,
int dwLogonType, int dwLogonProvider, ref IntPtr TokenHandle);

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

[DllImport("advapi32.dll", CharSet=CharSet.Auto, SetLastError=true)]
public extern static bool DuplicateToken(IntPtr ExistingTokenHandle,
int SECURITY_IMPERSONATION_LEVEL, ref IntPtr DuplicateTokenHandle);
}

/// <summary>
/// Summary description for NetworkSecurity.
/// </summary>
public class NetworkSecurity
{
private NetworkSecurity() {}

public static WindowsImpersonationContext ImpersonateUser(string domain, string login, string password,
LogonType logonType, LogonProvider logonProvider)
{
IntPtr tokenHandle = new IntPtr(0);
IntPtr dupeTokenHandle = new IntPtr(0);
try
{
const int SecurityImpersonation = 2;

tokenHandle = IntPtr.Zero;
dupeTokenHandle = IntPtr.Zero;

//
// Call LogonUser to obtain a handle to an access token.
//
bool returnValue = SecuUtil32.LogonUser(login, domain, password, (int)logonType,
(int)logonProvider, ref tokenHandle);

if (false == returnValue)
{
int ret = Marshal.GetLastWin32Error();
string strErr = String.Format("LogonUser failed with error code : {0}", ret);
throw new ApplicationException(strErr, null);
}

bool retVal = SecuUtil32.DuplicateToken(tokenHandle, SecurityImpersonation, ref dupeTokenHandle);

if (false == retVal)
{
SecuUtil32.CloseHandle(tokenHandle);
throw new ApplicationException("Failed to duplicate token", null);
}

//
// The token that is passed to the following constructor must
// be a primary token in order to use it for impersonation.
//
WindowsIdentity newId = new WindowsIdentity(dupeTokenHandle);
WindowsImpersonationContext impersonatedUser = newId.Impersonate();

return impersonatedUser;
}
catch (Exception ex)
{
throw new ApplicationException(ex.Message, ex);
}

return null;
}
}
}

The problem we are having is that while network resources are not restricted entirely because the batch files are able to run sql scripts against the Oracle database, FTP etc. but the user cannot access a network share either by unc path or trying to map a drive as part of the script. This problem only occurs when trying to run the script in this fashion as it works when run manually through a command prompt whic is expected, an also on a scheduled basis by the Windows Scheduler.

Is their a permission I need to request/grant on the assembly and if so which assembly (the library/web or both). I have tried granting full trust to the assemblies without success.

Alternatively is their a way to run a defined task from the scheduler. I read the documentation (all 2 lines of it) for the scheduler and did not get the impression that it is possible.

Regards,
Mark.

P.S. I cannot give you an exception or error messages that occur when I try to run the task from the web application, because as soon as I try to access a network resource using the page I have created it simply hangs/timesout but works perfectly when dealing with only local file resources. FYI all command files are on the local machine but need to access network shares to ctp then delete files.

Platform: Windows 2000 Server w/ 1.0 Framework
 
J

Joe Kaplan \(MVP - ADSI\)

How are you calling the script files in this app? Are you using the Process
class? In that case, you need to be aware that it will start the new
process with the current process' token, not the impersonation token. Since
it would appear that you have a primary token, you could get around this by
calling CreateProcessWithTokenW instead.

If that isn't how you are calling the scripts, then how are you doing it?

Joe K.

Mark Duregon said:
Hi,

We have an application that requires appropriate users to run command
files on an adhoc basis. We have implmented a library that uses the
following code:
using System;
using System.Runtime.InteropServices;
using System.Security.Principal;
using System.Security.Permissions;

namespace SAMIS.Porteco.Utilities
{
public enum LogonType : int
{
LOGON32_LOGON_INTERACTIVE = 2,
LOGON32_LOGON_NETWORK = 3,
LOGON32_LOGON_BATCH = 4,
LOGON32_LOGON_SERVICE = 5,
LOGON32_LOGON_UNLOCK = 7,
LOGON32_LOGON_NETWORK_CLEARTEXT = 8, // Only for Win2K or higher
LOGON32_LOGON_NEW_CREDENTIALS = 9 // Only for Win2K or higher
};

public enum LogonProvider : int
{
LOGON32_PROVIDER_DEFAULT = 0,
LOGON32_PROVIDER_WINNT35 = 1,
LOGON32_PROVIDER_WINNT40 = 2,
LOGON32_PROVIDER_WINNT50 = 3
};

class SecuUtil32
{
[DllImport("advapi32.dll", SetLastError=true)]
public static extern bool LogonUser(String lpszUsername, String
lpszDomain, String lpszPassword,
int dwLogonType, int dwLogonProvider, ref IntPtr TokenHandle);

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

[DllImport("advapi32.dll", CharSet=CharSet.Auto, SetLastError=true)]
public extern static bool DuplicateToken(IntPtr ExistingTokenHandle,
int SECURITY_IMPERSONATION_LEVEL, ref IntPtr DuplicateTokenHandle);
}

/// <summary>
/// Summary description for NetworkSecurity.
/// </summary>
public class NetworkSecurity
{
private NetworkSecurity() {}

public static WindowsImpersonationContext ImpersonateUser(string
domain, string login, string password,
LogonType logonType, LogonProvider logonProvider)
{
IntPtr tokenHandle = new IntPtr(0);
IntPtr dupeTokenHandle = new IntPtr(0);
try
{
const int SecurityImpersonation = 2;

tokenHandle = IntPtr.Zero;
dupeTokenHandle = IntPtr.Zero;

//
// Call LogonUser to obtain a handle to an access token.
//
bool returnValue = SecuUtil32.LogonUser(login, domain, password, (int)logonType,
(int)logonProvider, ref tokenHandle);

if (false == returnValue)
{
int ret = Marshal.GetLastWin32Error();
string strErr = String.Format("LogonUser failed with error code : {0}", ret);
throw new ApplicationException(strErr, null);
}

bool retVal = SecuUtil32.DuplicateToken(tokenHandle,
SecurityImpersonation, ref dupeTokenHandle);
if (false == retVal)
{
SecuUtil32.CloseHandle(tokenHandle);
throw new ApplicationException("Failed to duplicate token", null);
}

//
// The token that is passed to the following constructor must
// be a primary token in order to use it for impersonation.
//
WindowsIdentity newId = new WindowsIdentity(dupeTokenHandle);
WindowsImpersonationContext impersonatedUser = newId.Impersonate();

return impersonatedUser;
}
catch (Exception ex)
{
throw new ApplicationException(ex.Message, ex);
}

return null;
}
}
}

The problem we are having is that while network resources are not
restricted entirely because the batch files are able to run sql scripts
against the Oracle database, FTP etc. but the user cannot access a network
share either by unc path or trying to map a drive as part of the script.
This problem only occurs when trying to run the script in this fashion as it
works when run manually through a command prompt whic is expected, an also
on a scheduled basis by the Windows Scheduler.
Is their a permission I need to request/grant on the assembly and if so
which assembly (the library/web or both). I have tried granting full trust
to the assemblies without success.
Alternatively is their a way to run a defined task from the scheduler. I
read the documentation (all 2 lines of it) for the scheduler and did not get
the impression that it is possible.
Regards,
Mark.

P.S. I cannot give you an exception or error messages that occur when I
try to run the task from the web application, because as soon as I try to
access a network resource using the page I have created it simply
hangs/timesout but works perfectly when dealing with only local file
resources. FYI all command files are on the local machine but need to
access network shares to ctp then delete files.
 
M

Mark Duregon

Thanks, but I did mention that I am using Windows 2000 and 1.0 of the framework.

Joe Kaplan (MVP - ADSI) said:
How are you calling the script files in this app? Are you using the Process
class? In that case, you need to be aware that it will start the new
process with the current process' token, not the impersonation token. Since
it would appear that you have a primary token, you could get around this by
calling CreateProcessWithTokenW instead.

If that isn't how you are calling the scripts, then how are you doing it?

Joe K.

Mark Duregon said:
Hi,

We have an application that requires appropriate users to run command
files on an adhoc basis. We have implmented a library that uses the
following code:
using System;
using System.Runtime.InteropServices;
using System.Security.Principal;
using System.Security.Permissions;

namespace SAMIS.Porteco.Utilities
{
public enum LogonType : int
{
LOGON32_LOGON_INTERACTIVE = 2,
LOGON32_LOGON_NETWORK = 3,
LOGON32_LOGON_BATCH = 4,
LOGON32_LOGON_SERVICE = 5,
LOGON32_LOGON_UNLOCK = 7,
LOGON32_LOGON_NETWORK_CLEARTEXT = 8, // Only for Win2K or higher
LOGON32_LOGON_NEW_CREDENTIALS = 9 // Only for Win2K or higher
};

public enum LogonProvider : int
{
LOGON32_PROVIDER_DEFAULT = 0,
LOGON32_PROVIDER_WINNT35 = 1,
LOGON32_PROVIDER_WINNT40 = 2,
LOGON32_PROVIDER_WINNT50 = 3
};

class SecuUtil32
{
[DllImport("advapi32.dll", SetLastError=true)]
public static extern bool LogonUser(String lpszUsername, String
lpszDomain, String lpszPassword,
int dwLogonType, int dwLogonProvider, ref IntPtr TokenHandle);

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

[DllImport("advapi32.dll", CharSet=CharSet.Auto, SetLastError=true)]
public extern static bool DuplicateToken(IntPtr ExistingTokenHandle,
int SECURITY_IMPERSONATION_LEVEL, ref IntPtr DuplicateTokenHandle);
}

/// <summary>
/// Summary description for NetworkSecurity.
/// </summary>
public class NetworkSecurity
{
private NetworkSecurity() {}

public static WindowsImpersonationContext ImpersonateUser(string
domain, string login, string password,
LogonType logonType, LogonProvider logonProvider)
{
IntPtr tokenHandle = new IntPtr(0);
IntPtr dupeTokenHandle = new IntPtr(0);
try
{
const int SecurityImpersonation = 2;

tokenHandle = IntPtr.Zero;
dupeTokenHandle = IntPtr.Zero;

//
// Call LogonUser to obtain a handle to an access token.
//
bool returnValue = SecuUtil32.LogonUser(login, domain, password, (int)logonType,
(int)logonProvider, ref tokenHandle);

if (false == returnValue)
{
int ret = Marshal.GetLastWin32Error();
string strErr = String.Format("LogonUser failed with error code : {0}", ret);
throw new ApplicationException(strErr, null);
}

bool retVal = SecuUtil32.DuplicateToken(tokenHandle,
SecurityImpersonation, ref dupeTokenHandle);
if (false == retVal)
{
SecuUtil32.CloseHandle(tokenHandle);
throw new ApplicationException("Failed to duplicate token", null);
}

//
// The token that is passed to the following constructor must
// be a primary token in order to use it for impersonation.
//
WindowsIdentity newId = new WindowsIdentity(dupeTokenHandle);
WindowsImpersonationContext impersonatedUser = newId.Impersonate();

return impersonatedUser;
}
catch (Exception ex)
{
throw new ApplicationException(ex.Message, ex);
}

return null;
}
}
}

The problem we are having is that while network resources are not
restricted entirely because the batch files are able to run sql scripts
against the Oracle database, FTP etc. but the user cannot access a network
share either by unc path or trying to map a drive as part of the script.
This problem only occurs when trying to run the script in this fashion as it
works when run manually through a command prompt whic is expected, an also
on a scheduled basis by the Windows Scheduler.
Is their a permission I need to request/grant on the assembly and if so
which assembly (the library/web or both). I have tried granting full trust
to the assemblies without success.
Alternatively is their a way to run a defined task from the scheduler. I
read the documentation (all 2 lines of it) for the scheduler and did not get
the impression that it is possible.
Regards,
Mark.

P.S. I cannot give you an exception or error messages that occur when I
try to run the task from the web application, because as soon as I try to
access a network resource using the page I have created it simply
hangs/timesout but works perfectly when dealing with only local file
resources. FYI all command files are on the local machine but need to
access network shares to ctp then delete files.
Platform: Windows 2000 Server w/ 1.0 Framework
 
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J

Joe Kaplan \(MVP - ADSI\)

Yes, but my question was how are you launching the vbscript processes? I
understand the Win2K/1.0 part.

Joe K.

Mark Duregon said:
Thanks, but I did mention that I am using Windows 2000 and 1.0 of the framework.

Joe Kaplan (MVP - ADSI) said:
How are you calling the script files in this app? Are you using the Process
class? In that case, you need to be aware that it will start the new
process with the current process' token, not the impersonation token. Since
it would appear that you have a primary token, you could get around this by
calling CreateProcessWithTokenW instead.

If that isn't how you are calling the scripts, then how are you doing it?

Joe K.

Mark Duregon said:
Hi,

We have an application that requires appropriate users to run command
files on an adhoc basis. We have implmented a library that uses the
following code:
using System;
using System.Runtime.InteropServices;
using System.Security.Principal;
using System.Security.Permissions;

namespace SAMIS.Porteco.Utilities
{
public enum LogonType : int
{
LOGON32_LOGON_INTERACTIVE = 2,
LOGON32_LOGON_NETWORK = 3,
LOGON32_LOGON_BATCH = 4,
LOGON32_LOGON_SERVICE = 5,
LOGON32_LOGON_UNLOCK = 7,
LOGON32_LOGON_NETWORK_CLEARTEXT = 8, // Only for Win2K or higher
LOGON32_LOGON_NEW_CREDENTIALS = 9 // Only for Win2K or higher
};

public enum LogonProvider : int
{
LOGON32_PROVIDER_DEFAULT = 0,
LOGON32_PROVIDER_WINNT35 = 1,
LOGON32_PROVIDER_WINNT40 = 2,
LOGON32_PROVIDER_WINNT50 = 3
};

class SecuUtil32
{
[DllImport("advapi32.dll", SetLastError=true)]
public static extern bool LogonUser(String lpszUsername, String
lpszDomain, String lpszPassword,
int dwLogonType, int dwLogonProvider, ref IntPtr TokenHandle);

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

[DllImport("advapi32.dll", CharSet=CharSet.Auto, SetLastError=true)]
public extern static bool DuplicateToken(IntPtr ExistingTokenHandle,
int SECURITY_IMPERSONATION_LEVEL, ref IntPtr DuplicateTokenHandle);
}

/// <summary>
/// Summary description for NetworkSecurity.
/// </summary>
public class NetworkSecurity
{
private NetworkSecurity() {}

public static WindowsImpersonationContext ImpersonateUser(string
domain, string login, string password,
LogonType logonType, LogonProvider logonProvider)
{
IntPtr tokenHandle = new IntPtr(0);
IntPtr dupeTokenHandle = new IntPtr(0);
try
{
const int SecurityImpersonation = 2;

tokenHandle = IntPtr.Zero;
dupeTokenHandle = IntPtr.Zero;

//
// Call LogonUser to obtain a handle to an access token.
//
bool returnValue = SecuUtil32.LogonUser(login, domain,
password,
(int)logonType,
(int)logonProvider, ref tokenHandle);

if (false == returnValue)
{
int ret = Marshal.GetLastWin32Error();
string strErr = String.Format("LogonUser failed with error
code
: {0}", ret);
throw new ApplicationException(strErr, null);
}

bool retVal = SecuUtil32.DuplicateToken(tokenHandle,
SecurityImpersonation, ref dupeTokenHandle);
if (false == retVal)
{
SecuUtil32.CloseHandle(tokenHandle);
throw new ApplicationException("Failed to duplicate token", null);
}

//
// The token that is passed to the following constructor must
// be a primary token in order to use it for impersonation.
//
WindowsIdentity newId = new WindowsIdentity(dupeTokenHandle);
WindowsImpersonationContext impersonatedUser = newId.Impersonate();

return impersonatedUser;
}
catch (Exception ex)
{
throw new ApplicationException(ex.Message, ex);
}

return null;
}
}
}

The problem we are having is that while network resources are not
restricted entirely because the batch files are able to run sql scripts
against the Oracle database, FTP etc. but the user cannot access a network
share either by unc path or trying to map a drive as part of the script.
This problem only occurs when trying to run the script in this fashion as it
works when run manually through a command prompt whic is expected, an also
on a scheduled basis by the Windows Scheduler.
Is their a permission I need to request/grant on the assembly and if
so
which assembly (the library/web or both). I have tried granting full trust
to the assemblies without success.
Alternatively is their a way to run a defined task from the scheduler.
I
read the documentation (all 2 lines of it) for the scheduler and did not get
the impression that it is possible.
Regards,
Mark.

P.S. I cannot give you an exception or error messages that occur when
I
try to run the task from the web application, because as soon as I try to
access a network resource using the page I have created it simply
hangs/timesout but works perfectly when dealing with only local file
resources. FYI all command files are on the local machine but need to
access network shares to ctp then delete files.
Platform: Windows 2000 Server w/ 1.0 Framework
 
M

Mark Duregon

Sorry Joe,

I read your suggestion and looked at the documentation for CreateProcessWithTokenW and saw that it stated it was a Win2003 feature only. I then saw [MSFT] post a reply with a link that does suggest an article that does give an example that suggests it was introduced as part of Win2000. I am now grappling with trying to convert that example to C# with my extremly rusty VB skills, gave up on that and tried to create a VB.NET library of just that code but it appears to be VB6 and not VB.NET.

Does anyone have this code in C#? I think my VB skills are too rusty and I am not having any luck whatsoever with this.

Joe Kaplan (MVP - ADSI) said:
Yes, but my question was how are you launching the vbscript processes? I
understand the Win2K/1.0 part.

Joe K.

Mark Duregon said:
Thanks, but I did mention that I am using Windows 2000 and 1.0 of the framework.

Joe Kaplan (MVP - ADSI) said:
How are you calling the script files in this app? Are you using the Process
class? In that case, you need to be aware that it will start the new
process with the current process' token, not the impersonation token. Since
it would appear that you have a primary token, you could get around this by
calling CreateProcessWithTokenW instead.

If that isn't how you are calling the scripts, then how are you doing it?

Joe K.

Hi,

We have an application that requires appropriate users to run command
files on an adhoc basis. We have implmented a library that uses the
following code:

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

namespace SAMIS.Porteco.Utilities
{
public enum LogonType : int
{
LOGON32_LOGON_INTERACTIVE = 2,
LOGON32_LOGON_NETWORK = 3,
LOGON32_LOGON_BATCH = 4,
LOGON32_LOGON_SERVICE = 5,
LOGON32_LOGON_UNLOCK = 7,
LOGON32_LOGON_NETWORK_CLEARTEXT = 8, // Only for Win2K or higher
LOGON32_LOGON_NEW_CREDENTIALS = 9 // Only for Win2K or higher
};

public enum LogonProvider : int
{
LOGON32_PROVIDER_DEFAULT = 0,
LOGON32_PROVIDER_WINNT35 = 1,
LOGON32_PROVIDER_WINNT40 = 2,
LOGON32_PROVIDER_WINNT50 = 3
};

class SecuUtil32
{
[DllImport("advapi32.dll", SetLastError=true)]
public static extern bool LogonUser(String lpszUsername, String
lpszDomain, String lpszPassword,
int dwLogonType, int dwLogonProvider, ref IntPtr TokenHandle);

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

[DllImport("advapi32.dll", CharSet=CharSet.Auto, SetLastError=true)]
public extern static bool DuplicateToken(IntPtr ExistingTokenHandle,
int SECURITY_IMPERSONATION_LEVEL, ref IntPtr DuplicateTokenHandle);
}

/// <summary>
/// Summary description for NetworkSecurity.
/// </summary>
public class NetworkSecurity
{
private NetworkSecurity() {}

public static WindowsImpersonationContext ImpersonateUser(string
domain, string login, string password,
LogonType logonType, LogonProvider logonProvider)
{
IntPtr tokenHandle = new IntPtr(0);
IntPtr dupeTokenHandle = new IntPtr(0);
try
{
const int SecurityImpersonation = 2;

tokenHandle = IntPtr.Zero;
dupeTokenHandle = IntPtr.Zero;

//
// Call LogonUser to obtain a handle to an access token.
//
bool returnValue = SecuUtil32.LogonUser(login, domain, password,
(int)logonType,
(int)logonProvider, ref tokenHandle);

if (false == returnValue)
{
int ret = Marshal.GetLastWin32Error();
string strErr = String.Format("LogonUser failed with error code
: {0}", ret);
throw new ApplicationException(strErr, null);
}

bool retVal = SecuUtil32.DuplicateToken(tokenHandle,
SecurityImpersonation, ref dupeTokenHandle);

if (false == retVal)
{
SecuUtil32.CloseHandle(tokenHandle);
throw new ApplicationException("Failed to duplicate token",
null);
}

//
// The token that is passed to the following constructor must
// be a primary token in order to use it for impersonation.
//
WindowsIdentity newId = new WindowsIdentity(dupeTokenHandle);
WindowsImpersonationContext impersonatedUser =
newId.Impersonate();

return impersonatedUser;
}
catch (Exception ex)
{
throw new ApplicationException(ex.Message, ex);
}

return null;
}
}
}

The problem we are having is that while network resources are not
restricted entirely because the batch files are able to run sql scripts
against the Oracle database, FTP etc. but the user cannot access a network
share either by unc path or trying to map a drive as part of the script.
This problem only occurs when trying to run the script in this fashion as it
works when run manually through a command prompt whic is expected, an also
on a scheduled basis by the Windows Scheduler.

Is their a permission I need to request/grant on the assembly and if so
which assembly (the library/web or both). I have tried granting full trust
to the assemblies without success.

Alternatively is their a way to run a defined task from the scheduler. I
read the documentation (all 2 lines of it) for the scheduler and did not get
the impression that it is possible.

Regards,
Mark.

P.S. I cannot give you an exception or error messages that occur when I
try to run the task from the web application, because as soon as I try to
access a network resource using the page I have created it simply
hangs/timesout but works perfectly when dealing with only local file
resources. FYI all command files are on the local machine but need to
access network shares to ctp then delete files.

Platform: Windows 2000 Server w/ 1.0 Framework
 
M

Mark Duregon

Sorry Joe:

I read your response and looked at the documentation for CreateProcessWithTokenW which stated that Win2003 was required. I then saw the response from [MSFT] with a link to Support Article that indicated that the feature was introduced in Win2000. Since then I have been using the code in the article and trying to convert it to C#. I gave up on that because I could get it to compile but not run successfully (my result kept coming back as 0). I have now tried to create a VB.NET library using the code from that article. I think the code in that article was VB6 (I am not entirely sure my VB is far too rusty), but I have managed to get that to compile but I now get a runtime exception of a variable not being set to an instance.

To answer your question, I am using the Process class.

Again my apologies to you Joe, I must have read the wrong piece of documentation.

Does anyone happen to now of an example of this in C#?

Regards Mark.

Joe Kaplan (MVP - ADSI) said:
Yes, but my question was how are you launching the vbscript processes? I
understand the Win2K/1.0 part.

Joe K.

Mark Duregon said:
Thanks, but I did mention that I am using Windows 2000 and 1.0 of the framework.

Joe Kaplan (MVP - ADSI) said:
How are you calling the script files in this app? Are you using the Process
class? In that case, you need to be aware that it will start the new
process with the current process' token, not the impersonation token. Since
it would appear that you have a primary token, you could get around this by
calling CreateProcessWithTokenW instead.

If that isn't how you are calling the scripts, then how are you doing it?

Joe K.

Hi,

We have an application that requires appropriate users to run command
files on an adhoc basis. We have implmented a library that uses the
following code:

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

namespace SAMIS.Porteco.Utilities
{
public enum LogonType : int
{
LOGON32_LOGON_INTERACTIVE = 2,
LOGON32_LOGON_NETWORK = 3,
LOGON32_LOGON_BATCH = 4,
LOGON32_LOGON_SERVICE = 5,
LOGON32_LOGON_UNLOCK = 7,
LOGON32_LOGON_NETWORK_CLEARTEXT = 8, // Only for Win2K or higher
LOGON32_LOGON_NEW_CREDENTIALS = 9 // Only for Win2K or higher
};

public enum LogonProvider : int
{
LOGON32_PROVIDER_DEFAULT = 0,
LOGON32_PROVIDER_WINNT35 = 1,
LOGON32_PROVIDER_WINNT40 = 2,
LOGON32_PROVIDER_WINNT50 = 3
};

class SecuUtil32
{
[DllImport("advapi32.dll", SetLastError=true)]
public static extern bool LogonUser(String lpszUsername, String
lpszDomain, String lpszPassword,
int dwLogonType, int dwLogonProvider, ref IntPtr TokenHandle);

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

[DllImport("advapi32.dll", CharSet=CharSet.Auto, SetLastError=true)]
public extern static bool DuplicateToken(IntPtr ExistingTokenHandle,
int SECURITY_IMPERSONATION_LEVEL, ref IntPtr DuplicateTokenHandle);
}

/// <summary>
/// Summary description for NetworkSecurity.
/// </summary>
public class NetworkSecurity
{
private NetworkSecurity() {}

public static WindowsImpersonationContext ImpersonateUser(string
domain, string login, string password,
LogonType logonType, LogonProvider logonProvider)
{
IntPtr tokenHandle = new IntPtr(0);
IntPtr dupeTokenHandle = new IntPtr(0);
try
{
const int SecurityImpersonation = 2;

tokenHandle = IntPtr.Zero;
dupeTokenHandle = IntPtr.Zero;

//
// Call LogonUser to obtain a handle to an access token.
//
bool returnValue = SecuUtil32.LogonUser(login, domain, password,
(int)logonType,
(int)logonProvider, ref tokenHandle);

if (false == returnValue)
{
int ret = Marshal.GetLastWin32Error();
string strErr = String.Format("LogonUser failed with error code
: {0}", ret);
throw new ApplicationException(strErr, null);
}

bool retVal = SecuUtil32.DuplicateToken(tokenHandle,
SecurityImpersonation, ref dupeTokenHandle);

if (false == retVal)
{
SecuUtil32.CloseHandle(tokenHandle);
throw new ApplicationException("Failed to duplicate token",
null);
}

//
// The token that is passed to the following constructor must
// be a primary token in order to use it for impersonation.
//
WindowsIdentity newId = new WindowsIdentity(dupeTokenHandle);
WindowsImpersonationContext impersonatedUser =
newId.Impersonate();

return impersonatedUser;
}
catch (Exception ex)
{
throw new ApplicationException(ex.Message, ex);
}

return null;
}
}
}

The problem we are having is that while network resources are not
restricted entirely because the batch files are able to run sql scripts
against the Oracle database, FTP etc. but the user cannot access a network
share either by unc path or trying to map a drive as part of the script.
This problem only occurs when trying to run the script in this fashion as it
works when run manually through a command prompt whic is expected, an also
on a scheduled basis by the Windows Scheduler.

Is their a permission I need to request/grant on the assembly and if so
which assembly (the library/web or both). I have tried granting full trust
to the assemblies without success.

Alternatively is their a way to run a defined task from the scheduler. I
read the documentation (all 2 lines of it) for the scheduler and did not get
the impression that it is possible.

Regards,
Mark.

P.S. I cannot give you an exception or error messages that occur when I
try to run the task from the web application, because as soon as I try to
access a network resource using the page I have created it simply
hangs/timesout but works perfectly when dealing with only local file
resources. FYI all command files are on the local machine but need to
access network shares to ctp then delete files.

Platform: Windows 2000 Server w/ 1.0 Framework
 
M

Mark Duregon

Sorry Joe:

I read your response and looked at the documentation for CreateProcessWithTokenW which stated that Win2003 was required. I then saw the response from [MSFT] with a link to Support Article that indicated that the feature was introduced in Win2000. Since then I have been using the code in the article and trying to convert it to C#. I gave up on that because I could get it to compile but not run successfully (my result kept coming back as 0). I have now tried to create a VB.NET library using the code from that article. I think the code in that article was VB6 (I am not entirely sure my VB is far too rusty), but I have managed to get that to compile but I now get a runtime exception of a variable not being set to an instance.

To answer your question, I am using the Process class.

Again my apologies to you Joe, I must have read the wrong piece of documentation.

Does anyone happen to now of an example of this in C#?

Regards,
Mark.

Joe Kaplan (MVP - ADSI) said:
Yes, but my question was how are you launching the vbscript processes? I
understand the Win2K/1.0 part.

Joe K.

Mark Duregon said:
Thanks, but I did mention that I am using Windows 2000 and 1.0 of the framework.

Joe Kaplan (MVP - ADSI) said:
How are you calling the script files in this app? Are you using the Process
class? In that case, you need to be aware that it will start the new
process with the current process' token, not the impersonation token. Since
it would appear that you have a primary token, you could get around this by
calling CreateProcessWithTokenW instead.

If that isn't how you are calling the scripts, then how are you doing it?

Joe K.

Hi,

We have an application that requires appropriate users to run command
files on an adhoc basis. We have implmented a library that uses the
following code:

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

namespace SAMIS.Porteco.Utilities
{
public enum LogonType : int
{
LOGON32_LOGON_INTERACTIVE = 2,
LOGON32_LOGON_NETWORK = 3,
LOGON32_LOGON_BATCH = 4,
LOGON32_LOGON_SERVICE = 5,
LOGON32_LOGON_UNLOCK = 7,
LOGON32_LOGON_NETWORK_CLEARTEXT = 8, // Only for Win2K or higher
LOGON32_LOGON_NEW_CREDENTIALS = 9 // Only for Win2K or higher
};

public enum LogonProvider : int
{
LOGON32_PROVIDER_DEFAULT = 0,
LOGON32_PROVIDER_WINNT35 = 1,
LOGON32_PROVIDER_WINNT40 = 2,
LOGON32_PROVIDER_WINNT50 = 3
};

class SecuUtil32
{
[DllImport("advapi32.dll", SetLastError=true)]
public static extern bool LogonUser(String lpszUsername, String
lpszDomain, String lpszPassword,
int dwLogonType, int dwLogonProvider, ref IntPtr TokenHandle);

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

[DllImport("advapi32.dll", CharSet=CharSet.Auto, SetLastError=true)]
public extern static bool DuplicateToken(IntPtr ExistingTokenHandle,
int SECURITY_IMPERSONATION_LEVEL, ref IntPtr DuplicateTokenHandle);
}

/// <summary>
/// Summary description for NetworkSecurity.
/// </summary>
public class NetworkSecurity
{
private NetworkSecurity() {}

public static WindowsImpersonationContext ImpersonateUser(string
domain, string login, string password,
LogonType logonType, LogonProvider logonProvider)
{
IntPtr tokenHandle = new IntPtr(0);
IntPtr dupeTokenHandle = new IntPtr(0);
try
{
const int SecurityImpersonation = 2;

tokenHandle = IntPtr.Zero;
dupeTokenHandle = IntPtr.Zero;

//
// Call LogonUser to obtain a handle to an access token.
//
bool returnValue = SecuUtil32.LogonUser(login, domain, password,
(int)logonType,
(int)logonProvider, ref tokenHandle);

if (false == returnValue)
{
int ret = Marshal.GetLastWin32Error();
string strErr = String.Format("LogonUser failed with error code
: {0}", ret);
throw new ApplicationException(strErr, null);
}

bool retVal = SecuUtil32.DuplicateToken(tokenHandle,
SecurityImpersonation, ref dupeTokenHandle);

if (false == retVal)
{
SecuUtil32.CloseHandle(tokenHandle);
throw new ApplicationException("Failed to duplicate token",
null);
}

//
// The token that is passed to the following constructor must
// be a primary token in order to use it for impersonation.
//
WindowsIdentity newId = new WindowsIdentity(dupeTokenHandle);
WindowsImpersonationContext impersonatedUser =
newId.Impersonate();

return impersonatedUser;
}
catch (Exception ex)
{
throw new ApplicationException(ex.Message, ex);
}

return null;
}
}
}

The problem we are having is that while network resources are not
restricted entirely because the batch files are able to run sql scripts
against the Oracle database, FTP etc. but the user cannot access a network
share either by unc path or trying to map a drive as part of the script.
This problem only occurs when trying to run the script in this fashion as it
works when run manually through a command prompt whic is expected, an also
on a scheduled basis by the Windows Scheduler.

Is their a permission I need to request/grant on the assembly and if so
which assembly (the library/web or both). I have tried granting full trust
to the assemblies without success.

Alternatively is their a way to run a defined task from the scheduler. I
read the documentation (all 2 lines of it) for the scheduler and did not get
the impression that it is possible.

Regards,
Mark.

P.S. I cannot give you an exception or error messages that occur when I
try to run the task from the web application, because as soon as I try to
access a network resource using the page I have created it simply
hangs/timesout but works perfectly when dealing with only local file
resources. FYI all command files are on the local machine but need to
access network shares to ctp then delete files.

Platform: Windows 2000 Server w/ 1.0 Framework
 
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J

Joe Kaplan \(MVP - ADSI\)

Also, www.pinvoke.net has tons of pinvoke stuff on their wiki. It is a good
reference for this stuff (although I didn't find that one here).

Joe K.
 
J

Joe Kaplan \(MVP - ADSI\)

So, the issue with using the Process class is that it won't create the
process using the token that is being impersonated on the thread, but will
use the process token instead. I believe that explains why it wasn't
working the way you were expecting.

I'm not sure what's wrong with your code without checking it out, but you
might consider jumping over to the interop group to get some help with that
(or perhaps try a Google groups search to see if it is already asked and
answered).

The good news is that your code to create the token that you were using for
impersonation will be useful to pass into this, so once you get this
working, you should be all set.

I hope it works out.

Joe K.

Mark Duregon said:
Sorry Joe:

I read your response and looked at the documentation for
CreateProcessWithTokenW which stated that Win2003 was required. I then saw
the response from [MSFT] with a link to Support Article that indicated that
the feature was introduced in Win2000. Since then I have been using the
code in the article and trying to convert it to C#. I gave up on that
because I could get it to compile but not run successfully (my result kept
coming back as 0). I have now tried to create a VB.NET library using the
code from that article. I think the code in that article was VB6 (I am not
entirely sure my VB is far too rusty), but I have managed to get that to
compile but I now get a runtime exception of a variable not being set to an
instance.
To answer your question, I am using the Process class.

Again my apologies to you Joe, I must have read the wrong piece of documentation.

Does anyone happen to now of an example of this in C#?

Regards Mark.

Joe Kaplan (MVP - ADSI) said:
Yes, but my question was how are you launching the vbscript processes? I
understand the Win2K/1.0 part.

Joe K.

Mark Duregon said:
Thanks, but I did mention that I am using Windows 2000 and 1.0 of the framework.

:

How are you calling the script files in this app? Are you using the Process
class? In that case, you need to be aware that it will start the new
process with the current process' token, not the impersonation
token.
Since
it would appear that you have a primary token, you could get around
this
by
calling CreateProcessWithTokenW instead.

If that isn't how you are calling the scripts, then how are you
doing
it?
Joe K.

Hi,

We have an application that requires appropriate users to run command
files on an adhoc basis. We have implmented a library that uses the
following code:

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

namespace SAMIS.Porteco.Utilities
{
public enum LogonType : int
{
LOGON32_LOGON_INTERACTIVE = 2,
LOGON32_LOGON_NETWORK = 3,
LOGON32_LOGON_BATCH = 4,
LOGON32_LOGON_SERVICE = 5,
LOGON32_LOGON_UNLOCK = 7,
LOGON32_LOGON_NETWORK_CLEARTEXT = 8, // Only for Win2K or higher
LOGON32_LOGON_NEW_CREDENTIALS = 9 // Only for Win2K or higher
};

public enum LogonProvider : int
{
LOGON32_PROVIDER_DEFAULT = 0,
LOGON32_PROVIDER_WINNT35 = 1,
LOGON32_PROVIDER_WINNT40 = 2,
LOGON32_PROVIDER_WINNT50 = 3
};

class SecuUtil32
{
[DllImport("advapi32.dll", SetLastError=true)]
public static extern bool LogonUser(String lpszUsername, String
lpszDomain, String lpszPassword,
int dwLogonType, int dwLogonProvider, ref IntPtr TokenHandle);

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

[DllImport("advapi32.dll", CharSet=CharSet.Auto, SetLastError=true)]
public extern static bool DuplicateToken(IntPtr ExistingTokenHandle,
int SECURITY_IMPERSONATION_LEVEL, ref IntPtr DuplicateTokenHandle);
}

/// <summary>
/// Summary description for NetworkSecurity.
/// </summary>
public class NetworkSecurity
{
private NetworkSecurity() {}

public static WindowsImpersonationContext ImpersonateUser(string
domain, string login, string password,
LogonType logonType, LogonProvider logonProvider)
{
IntPtr tokenHandle = new IntPtr(0);
IntPtr dupeTokenHandle = new IntPtr(0);
try
{
const int SecurityImpersonation = 2;

tokenHandle = IntPtr.Zero;
dupeTokenHandle = IntPtr.Zero;

//
// Call LogonUser to obtain a handle to an access token.
//
bool returnValue = SecuUtil32.LogonUser(login, domain, password,
(int)logonType,
(int)logonProvider, ref tokenHandle);

if (false == returnValue)
{
int ret = Marshal.GetLastWin32Error();
string strErr = String.Format("LogonUser failed with
error
code
: {0}", ret);
throw new ApplicationException(strErr, null);
}

bool retVal = SecuUtil32.DuplicateToken(tokenHandle,
SecurityImpersonation, ref dupeTokenHandle);

if (false == retVal)
{
SecuUtil32.CloseHandle(tokenHandle);
throw new ApplicationException("Failed to duplicate token",
null);
}

//
// The token that is passed to the following constructor must
// be a primary token in order to use it for impersonation.
//
WindowsIdentity newId = new WindowsIdentity(dupeTokenHandle);
WindowsImpersonationContext impersonatedUser =
newId.Impersonate();

return impersonatedUser;
}
catch (Exception ex)
{
throw new ApplicationException(ex.Message, ex);
}

return null;
}
}
}

The problem we are having is that while network resources are not
restricted entirely because the batch files are able to run sql scripts
against the Oracle database, FTP etc. but the user cannot access a network
share either by unc path or trying to map a drive as part of the script.
This problem only occurs when trying to run the script in this
fashion
as it
works when run manually through a command prompt whic is expected,
an
also
on a scheduled basis by the Windows Scheduler.

Is their a permission I need to request/grant on the assembly and
if
so
which assembly (the library/web or both). I have tried granting
full
trust
to the assemblies without success.

Alternatively is their a way to run a defined task from the
scheduler.
I
read the documentation (all 2 lines of it) for the scheduler and did
not
get
the impression that it is possible.

Regards,
Mark.

P.S. I cannot give you an exception or error messages that occur
when
I
try to run the task from the web application, because as soon as I
try
to
access a network resource using the page I have created it simply
hangs/timesout but works perfectly when dealing with only local file
resources. FYI all command files are on the local machine but need to
access network shares to ctp then delete files.

Platform: Windows 2000 Server w/ 1.0 Framework
 
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Y

Yan-Hong Huang[MSFT]

Hello Mark,

I was reviewing the issue thread. Do you have completed the code
successfully? Luke and Joe has provided much userful resource on it. If you
have any more concerns, please feel free to post here and we will follow up.

Thanks very much.

Best regards,
Yanhong Huang
Microsoft Community Support

Get Secure! ¨C www.microsoft.com/security
Register to Access MSDN Managed Newsgroups!
-http://support.microsoft.com/default.aspx?scid=/servicedesks/msdn/nospam.as
p&SD=msdn

This posting is provided "AS IS" with no warranties, and confers no rights.
 

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