openwall / openwall/john

Add Drupal7 OpenCL format

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#3,315 1 comment 0 reactions 0 assignees View on GitHub

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enhancement
Dominant language
C
Stars
13.6k
Forks
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PR merge metrics
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Description

We now support Drupal7 hashes on CPU and on FPGA, but apparently not on GPU. This is weird. We should probably add an OpenCL implementation. This is similar to but simpler than sha512crypt, which we do have in OpenCL. This is in other ways similar to phpass, which we also do have in OpenCL. Combining these into a drupal7-opencl format shouldn't be too hard.

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start by reading the existing OpenCL implementations for sha512crypt and phpass, then compare their structure with the supported Drupal7 CPU and FPGA formats. The work is done when a drupal7-opencl format is supported on GPU and its behavior matches the existing Drupal7 implementations.

Written by the indexing model from the issue text.

Assessment

Tech stack
c
Domain
security
Issue type
Feature
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
35/100

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