openwall / openwall/john

Argon2: Add MIC support

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enhancement
Dominant language
C
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Description

Xeon Phi / MIC is indeed legacy, but this can be a little fun and easy project now that we have AVX-512 support for Argon2. It could be as easy as extending the SIMD macro checks and maybe making use of MIC's fused multiply-add (like we do in php_mt_seed).

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 locating Argon2's AVX-512 SIMD macro checks and compare the existing MIC fused multiply-add usage in php_mt_seed. Done means Argon2 builds with Xeon Phi/MIC support and its relevant checks confirm the new implementation works.

Written by the indexing model from the issue text.

Assessment

Tech stack
c
Domain
performance
Issue type
Feature
Difficulty
3/5
Estimated time
1-2 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
42/100

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