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Creating a graphical password prompt for a cmd line only app
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eponymous
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PostPosted: Tue Aug 27, 2013 8:40 am    Post subject: Creating a graphical password prompt for a cmd line only app Reply with quote

Hi,

I have a relatively simple task I need to do but since I'm not very up to speed with GUI programming I'm not sure the best way to go about this.

I have a command line application which when run, will prompt for a password and then fork off into the background.

What I want to do is create a graphical interface to this application which when run will prompt the user for the same password and pass it (securely) to the application.

This is so I can add the application to the XFCE startup manager and have it run at login.

This is very much akin to OpenSSH and the ssh-askpass setup I already have.

Does anyone have any ideas? Python, Tcl/Tk, Gtk?

Thanks!
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franzf
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PostPosted: Tue Aug 27, 2013 8:46 am    Post subject: Reply with quote

What about shell-script + xdialog? (You might also add support for kdialog...)
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eponymous
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PostPosted: Tue Aug 27, 2013 7:58 pm    Post subject: Reply with quote

franzf wrote:
What about shell-script + xdialog? (You might also add support for kdialog...)


Ah this looks promising.

Are there any security concerns with using Xdialog for capturing a password?

Cheers!
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franzf
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PostPosted: Wed Aug 28, 2013 8:46 am    Post subject: Reply with quote

eponymous wrote:
franzf wrote:
What about shell-script + xdialog? (You might also add support for kdialog...)


Ah this looks promising.

Are there any security concerns with using Xdialog for capturing a password?

Cheers!

I think that should be safe - as long as you make sure your password won't be saved in plaintext to disk.

just a short example:
Code:
pwd=$(Xdialog --stdout --left --title "I need your password" --password --inputbox "Password needed for action XYZ" 0 0)

$pwd now stores your pwd.
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