2

I'm just trying out hashcat v3.6.0 on an up-to-date Arch Linux laptop.

hashcat -I shows me this:

OpenCL Info:

Platform ID #1
  Vendor  : Intel(R) Corporation
  Name    : Intel(R) OpenCL
  Version : OpenCL 1.2 LINUX

  Device ID #1
    Type           : CPU
    Vendor ID      : 8
    Vendor         : Intel(R) Corporation
    Name           : Intel(R) Core(TM) i5-2520M CPU @ 2.50GHz
    Version        : OpenCL 1.2 (Build 25)
    Processor(s)   : 4
    Clock          : 2500
    Memory         : 1966/7867 MB allocatable
    OpenCL Version : OpenCL C 1.2 
    Driver Version : 1.2.0.25

I'm invoking hashcat on a WPA password hash I recovered from my WAP, using airodump-ng. Yes, I know the password, I want to verify that hashcat either can or can't find it.

I invoke hashcat like this:

/usr/bin/hashcat -a 0 -d 1 -m 2500 -o recovered.hash sporc.hccapx dictionary.txt

hashcat always ends up giving me this:

Initializing device kernels and memory...clCreateContext(): CL_INVALID_PLATFORM

What gives? If hashcat can't use the platform, why does hashcat -I give any information about it at all?

|improve this question
1

This message is straight from Intel's OpenCL, and hashcat just passes it along.

Intel's OpenCL has some known issues - so much so that there is usually a warning from hashcat if Intel's OpenCL is being used, which notes that errors can be overridden with --force. Did you see anything like that? You may be running into this.

If you are using a stock OS OpenCL of some kind, consider using the latest from Intel.

If you are running under Kali and/or in a VM, consider using hashcat directly on the native platform and/or a non-Kali distro.

Do you get any other errors?

|improve this answer
  • That was the only message that even hinted at a problem. I'm running hashcat on Arch linux directly on a Dell Latitude 6240, no VM, no container. I'll try the --force option. – Bruce Ediger Aug 3 '17 at 13:41
  • --force didn't help - same meager error message. I'll just take this as a suggestion to try hashcat on a more supported platform and device. – Bruce Ediger Aug 4 '17 at 3:43
  • I had a lot of problems on a Kali vm to configure OpenCL. But Parrot Security Linux has all the needed by default to run CPU hashcat in a vm. It works without touching anything. Maybe as a last resort you can install a vm with Parrot if you finally can't make it work. – OscarAkaElvis Sep 17 '17 at 21:32
  • That's fair - though I would also point out that hashcat on a reasonably modern GPU is so much faster than GPU that it's worth trying to arrange for that. :) – Royce Williams Sep 18 '17 at 1:19
0

I encountered the same issue. Try doing hashcat -I, and listing how many devices you have. I found that when using --opencl-device-types 1,2,3 --force produced the same issue with this error:

clCreateContext(): CL_INVALID_PLATFORM

so I didn't use device 1, and it was perfect. I have been cracking hashes since. To be honest, using just the GPU is a much better anyway. I believe it's an error with the Intel GPU driver.

|improve this answer

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.