Windows Service doesn't start process with different credentials
- by Marcus
I have a Windows Service, running as a user, that should start several processes under different user credentials.
I'm using the following code to start a process:
Dim winProcess As New System.Diagnostics.Process
With winProcess
.StartInfo.Arguments = "some_args"
.StartInfo.CreateNoWindow = True
.StartInfo.ErrorDialog = False
.StartInfo.FileName = "C:\TEMP\ProcessFromService\ProcessFromService\bin\Debug\ProcessFromService.exe"
.StartInfo.UseShellExecute = False
.StartInfo.WindowStyle = ProcessWindowStyle.Hidden
'Opgave WorkingDirectory kan soms tot problemen leiden, indien betreffende directory
'niet bereikbaar (rechten) is voor opgegeven gebruiker.
'Beter dus om deze niet op te geven.
'.StartInfo.WorkingDirectory = My.Computer.FileSystem.SpecialDirectories.Temp
.StartInfo.Domain = ""
.StartInfo.UserName = "MyUserId"
Dim strPassword As String = "MyPassword"
Dim ssPassword As New Security.SecureString
For Each chrPassword As Char In strPassword.ToCharArray
ssPassword.AppendChar(chrPassword)
Next
.StartInfo.Password = ssPassword
.Start()
End With
The process is correctly started when I use the same credentials as of which the Windows Service is running under.
The process is not started, without any error, when I use different credentials.
In other words:
If the Windows Service is running as UserA then I can start a process running as UserA. If the Windows Service is running as UserB then I can not start a process running as UserA.
I have created a test project in which I can reproduce this problem. If you put this project in C:\Temp then the used paths will be correct.
You can download this test project here:
https://dl.dropboxusercontent.com/u/5391091/ProcessFromService.zip
NB: I hope this info is enough to explain it. If you need more info, please let me know and I will add it.
