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Old 03-21-2007, 02:30 PM   #1
Registered: Jan 2006
Distribution: Debian Testing
Posts: 675

Rep: Reputation: 58
python gtk program almost done, stuck at os.popen? Maybe?

Hey guys,
I'm just about done with my DM-Crypt / LUKS wrapper gui.
I'm just stuck at one step. I need to run:

cryptsetup --verbose --cipher 'aes-cbc-essiv:sha256 _
--key-size 256 --verify-passphrase luksFormat /dev/loop0

some of the above is in variables but thats neither here nor there. I can run it w/o the --verify-passphrase option but that is pointless because when u do luksOpen you have to enter a password anyway.

I tried:
cmd = <above cryptsetup command>
a = os.popen(cmd, "w")
a.write(password) #For First Prompt
a.write(password) #For Second Prompt

Turns out, this doesn't work.
Can someone help me figure out how I can pass the password to the prompts when the prompts are displayed?

I've been searching the net and I haven't found anything that I understand.

Thanks for you help,
Old 03-22-2007, 03:44 PM   #2
Registered: Jan 2006
Distribution: Debian Testing
Posts: 675

Original Poster
Rep: Reputation: 58
I just wanted to clarify one thing:

When I run the cryptsetup command, it says can not verify passphrase on a non-tty terminal. Is there another way around this? Or does anyone know how to use os.execv command?



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