I am running Windows 7 SP1.

I have installed CygWin with OpenSSH, so now I have a running SSH Daemon that seems to be working OK, except for a problem with an interactive command-line program that requires keystrokes to be managed.

This is the program (OCLHashCat, a GPU number cruncher):

D:\Temporal\>d:\Programas\HashCat\OCLHashCat\oclhashcat64.exe Test.hccap -m 2500 -a 3 ?d?d?d?d?d?d?d?d   | tee Resultado.txt

oclHashcat v1.31 starting...

WARN: ADL_Overdrive6_FanSpeed_Get(): -5

Device #1: Bonaire, 1024MB, 1050Mhz, 12MCU
Device #2: Tahiti, 3072MB, 900Mhz, 28MCU

Hashes: 1 hashes; 1 unique digests, 1 unique salts
Bitmaps: 8 bits, 256 entries, 0x000000ff mask, 1024 bytes
Applicable Optimizers:
* Zero-Byte
* Single-Hash
* Single-Salt
* Brute-Force
Watchdog: Temperature abort trigger set to 90c
Watchdog: Temperature retain trigger set to 80c
Device #1: Kernel d:\Programas\HashCat\OCLHashCat/kernels/4098/m02500.Bonaire_1573.4_1573.4 (VM).kernel (259320 bytes)
Device #1: Kernel d:\Programas\HashCat\OCLHashCat/kernels/4098/markov_le_v1.Bonaire_1573.4_1573.4 (VM).kernel (92404 bytes)
Device #1: Kernel d:\Programas\HashCat\OCLHashCat/kernels/4098/bzero.Bonaire_1573.4_1573.4 (VM).kernel (30496 bytes)
Device #2: Kernel d:\Programas\HashCat\OCLHashCat/kernels/4098/m02500.Tahiti_1573.4_1573.4 (VM).kernel (259428 bytes)
Device #2: Kernel d:\Programas\HashCat\OCLHashCat/kernels/4098/markov_le_v1.Tahiti_1573.4_1573.4 (VM).kernel (92388 bytes)
Device #2: Kernel d:\Programas\HashCat\OCLHashCat/kernels/4098/bzero.Tahiti_1573.4_1573.4 (VM).kernel (30492 bytes)

[s]tatus [p]ause [r]esume [b]ypass [q]uit => s

Luis-@Windu /cygdrive/d/Temporal/

As you can see, I tried by pressing s and q , but the interactive program did not respond to keystrokes until I did Ctrl+C.

Furthermore, the process oclhashcat64.exe remained in memory, and I had to kill it manually.

I have checked with these SSH clients; I think all of them are in their latest version:

  • Putty.
  • GNU SSH command line tool (included in modern Ubuntu, for example).
  • Bitvise SSH Client.

I have installed (on another TCP port) the Bitvise SSH server too, and I don’t have this keystrokes problem using it, so it could be some sort of OpenSSH matter.

The issue is I need access to CygWin’s commands, so I need to connect via the OpenSSH version installed within CygWin. The Bitvise is one only gives me access to CMD Shell or PowerShell.
I can not try this OCLHashCat program in another computer or operating system, due to it requires GPU high-end devices, perfect drivers configuration, etc…

How could I solve the keystroke issue?


Well, it seems that, as for now (November 2014), the issue is a limitation on the original program. Here is the error reporting ticket.

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.