Date: Sat, 7 May 2016 21:30:00 -0400 From: Matt Weir <cweir@...edu> To: "john-users@...ts.openwall.com" <john-users@...ts.openwall.com> Subject: Re: Status of session when using -pipe and -stdin Thanks for the reply! I agree with your assessment, but unfortunately getting the pid of john automatically into the script is difficult. At that point, it's easier just to do the ./john -status in a different window. I was hoping there might be some sort of control character I could send via stdin that would prompt john to display a status. For example if 'THIS_IS_A_JTR_STATUS_REQUEST' encoded in UTF-8, (or some truely weird/custom UTF-16 character combo), is sent then display a status output. Since that's unlikely to represent a real password it hopefully wouldn't negatively impact real cracking sessions. That being said, I think the use case of such a feature is pretty small and it does have the potential to impact real cracking sessions, (at least from a speed perspective if nothing else), so if it doesn't already exist I'd probably argue against adding it. It was just something that's been bugging me for a bit so I figured I'd ask. A simple workaround on my part would be to pass the john cracking session name in to the script as an argument and then have it call ./john -status directly. Thanks again, Matt On Sat, May 7, 2016 at 1:04 PM, jfoug <jfoug@...nwall.net> wrote: > On 5/7/2016 11:12 AM, Matt Weir wrote: > >> I frequently run other scipts and feed the input into John using the -pipe >> or -stdin options. If I want to get the status of the cracking session >> normally I just run in another terminal >> >> ./john -status -session=blah >> >> What I was wondering was if there was a way to have the script i'm running >> send JtR a special value to have the running session of JtR print out a >> status output. >> >> Aka if I'm running >> >> ./myscript.sh | ./john -stdin -format=raw-md5 password_list.txt >> >> and I hit <enter>, the output would be >> >> <Output from myscript.sh> >> <Status output from JtR> >> >> That way anyone else using myscript.sh could get status output from both >> programs without having to open up another terminal. >> > > The only way I see of doing this, is to get that signal that you want the > status in your script (catch the <enter>) and then do a kill -SIGUSR1 to > the pid of john. John does not have connection to a tty in this case (when > it is a filter), so it is not able to monitor keystrokes like it does when > simply launched from the shell. Since your script is the owner of the tty, > then it will have to take over duties of that, and relay them to the john > instance (such as using the kill command to send it a signal). > > Others may think of a more elegant solution, but that is about all I can > see right off. > > -- > Community volunteer for John the Ripper project. > > > > --- > This email has been checked for viruses by Avast antivirus software. > https://www.avast.com/antivirus >
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