Cannot commuincate with oclHashcat process

[ubtks]

Hello everyone,

I am trying to run oclHashcat as a subprocess in Python. I can start it up just fine, but I cannot pass the usual commands ([s]tatus, [q]uit, etc) by simply writing that character to STDIN.

Code:

import time
import shlex
from subprocess import Popen, PIPE

command = "\"cudaHashcat64.exe\" --quiet -m 0 -a 3 xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"
proc = Popen(shlex.split(command), stdout=PIPE, stdin=PIPE, stderr=PIPE)

time.sleep(1)

proc.stdin.write("s")

time.sleep(1)

for line in iter(proc.stdout.readline, b''):
    if line:
        if line != "\r\n" and line != "\n":
            print(line)
            proc.stdout.flush()
    else:
        break

proc.terminate()

I should be getting a status response (that will be shown if I remove "--quiet"), but I want to be able to send commands to it. Is oclHashcat not using STDIN and/or only expecting a single character?

I have been googling this for some time, found others that have had a similar issue, and can't view the source to figure it out myself, I would really appreciate any feedback you may have.

Thank you in advanced for any help or ideas!

[undeath]

To read the status it is recommended to parse the restore file.

[philsmd]

reading the restore file is one possibility, the other one would be (and afaik most "wrappers" choose this way) to use --status --status-automat (see also https://hashcat.net/trac/ticket/406 ).

Btw. also next version of cpu hashcat will ship with the --status-automat feature (see https://hashcat.net/trac/ticket/534 ).

[ubtks]

Thanks for those tips!

But, what about pausing and resuming? I would like to have full functionality over oclHashcat if possible.

With some further research I would guess that in linux that it will read keypresses from TTY directly, and does not use STDIN, is that true?