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Resolved CreateProcess API Function

  1. How-to
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  1. Roland Smith
    Roland Smith
  2. PowerBuilder
  3. Tuesday, 19 September 2023 17:52 PM UTC

I'm using CreateProcess to run an EXE and WaitForSingleObject to wait for it to finish.

My problem is that I need the EXE process to have the same security access as the calling EXE. I'm guessing the lpProcessAttributes argument needs to be populated but how that is done, I don't know.

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Accepted Answer
Francisco Martinez @Appeon
Francisco Martinez @Appeon Accepted Answer Pending Moderation
  1. Tuesday, 19 September 2023 19:12 PM UTC
  2. PowerBuilder
  3. # Permalink

Hi Roland,

Through this StackOverflow post I found that you can use the function CreateProcessWithTokenW to create a process passing it a specific process access token. Additionally, I found this other function GetCurrentProcessToken that retrieves the access token for the current process.
I haven't personally tested this but it might work.

 

Regards,
Francisco

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Roland Smith
  1. Roland Smith
  2. Tuesday, 19 September 2023 19:39 PM UTC
It turns out that security wasn't the issue. The actual problem was that I had quotes around the filename in the command line string passed to CreateProcess. The secondary EXE couldn't open the file because it had quotes in the filename string. Once I removed the quotes it started working.

I'll look at this when I get a chance. Thanks.
  1. Helpful 2
Miguel Leeuwe
  1. Miguel Leeuwe
  2. Wednesday, 20 September 2023 04:02 AM UTC
Just in case:

Beware also of TAB characters. We use CatSoft's DLL (combined or not with OLE), to be able to drag and drop Outlook emails onto a dw. The e-mail's Subject is being used as the filename and who knows why, some of our customers have TABs in the Subject. It turns out that the file can be saved with a TAB character, but afterwards opening the .msg / .eml file won't work.
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Responses (3)
John Fauss
John Fauss Accepted Answer Pending Moderation
  1. Tuesday, 19 September 2023 19:55 PM UTC
  2. PowerBuilder
  3. # 1

@Roland - Glad to hear you found the cause of the issue!

@Franscisco - I'm not sure the GetCurrentProcessToken API will be useful in this case. I found the following in the description of that API:

Excellent find regarding the CreateProcessWithTokenW API function, however! I was not aware of that API.

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Roland Smith
  1. Roland Smith
  2. Wednesday, 20 September 2023 13:38 PM UTC
I just noticed this in the help for CreateProcess:



Creates a new process and its primary thread. The new process runs in the security context of the calling process.
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John Fauss
John Fauss Accepted Answer Pending Moderation
  1. Tuesday, 19 September 2023 18:50 PM UTC
  2. PowerBuilder
  3. # 2

Hi, Roland - 

If it were me, I'd search C++ "heavy hitter" web sites like StackOverflow.com using search arguments "createprocess" and "security_attributes"... at least to get started, and see what turns up.

Best regards, John

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