openwall / openwall/john

Dynamic SIMD porting to BE systems

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enhancement
Dominant language
C
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Description

In #2888, the dynamic format was made to work when building with a SIMD BE system. This was done by disabling just the dynamic format, so that it runs as a oSSL CTX mode only. This is not ideal, BUT it allows that project to carry forward

The reason for this separate bug for dynamic, is that dynamic changes are VERY large, and difficult. I wanted to separated actually making dynamic WORK with AltiVec BE systems, vs having it work around the SIMD in those cases.

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 reviewing issue #2888 and the dynamic SIMD handling for AltiVec big-endian systems. The work is done when the dynamic format works with AltiVec BE systems instead of relying on the current workaround that disables it.

Written by the indexing model from the issue text.

Assessment

Tech stack
c
Domain
performance
Issue type
Bug
Difficulty
5/5
Estimated time
Over a week
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
15/100

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