Override NTFS permissions in code

Keith Chisarik — Tue, 28 Oct 2008 16:33:51 GMT

Question:

If I have an application I wrote that executes under Windows login "generaluser", I now want my application in specific scenarios to write a file to a network folder to which "generaluser" does not have write NTFS permissions. How can I accomplish this?

RE: Override NTFS permissions in code

Keith Chisarik — Tue, 28 Oct 2008 16:33:51 GMT

thanks, all I was hoping for was a namespace or starting place from someone who has done this, Google turned up a lot of options. I'll check out what you posted, appreciated as always.

RE: Override NTFS permissions in code

Trent L. Taylor — Tue, 28 Oct 2008 09:17:07 GMT

You can go at this several ways and it can get somewhat complicated depending on the route that you take. Let's first look at spawning an EXE to perform a certain action with different credentials.

[codesnippet]Dim startInfo As New System.Diagnostics.ProcessStartInfo("C:\MyApp.exe")
Dim password As New System.Security.SecureString()
Dim process As System.Diagnostics.Process

'-- Build the secure password string
For Each c As Char In "MyPassword"
password.AppendChar(c)
Next

'-- Set the security login credentials
startInfo.UserName = "MyWindowsUser"
startInfo.Domain = "MYDOMAIN"
startInfo.Password = password

'-- Spawn the process
process = System.Diagnostics.Process.Start(startInfo)

'-- If you want to wait for the process to exit you can wait like this
process.WaitForExit()[/codesnippet]

Now if you want to create isolation levels within your assembly, it gets a lot more complicated. You will have to apply security attributes and configure each client machine that will execute the code. I am obviously not getting too deep here as this can become a really big tutorial in and of itself, but if you have this need, then a web search would probably be your best best as I ams ure that there are probably already some articles out on CodeProject or something along those lines showing how to do this.

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Override NTFS permissions in code

RE: Override NTFS permissions in code

RE: Override NTFS permissions in code