"Unknown hash" cracker format
Nobody has claimed this yet.
- Dominant language
- C
- Stars
- 13.6k
- Forks
- 2.6k
- PR merge metrics
- No merged PRs in 30d
Description
Here's a crazy idea I got from the PCrack team name of 907f92033ed720bba4da2f3e08588648 😄
We could write an OpenCL format where input is a 128-bit hash of unknown type. Create a format that for every candidate p tries md4(p), md5(p), sha1(p) and so on, also including some common combinations like md5(md5($p)), sha1(md5($p)) and so on (and also doing eg. SHA-2 and SHA-3) as well as things like md5(utf16le(p)). For hashes larger than 128-bits we compare the first (and last?) 128 bits of the resulting hash.
This means we have "GPU-side acceleration" of, say, 16x or more even without mask but we need GPU-side mask as well.
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start with the issue proposal, which describes an OpenCL format for trying multiple hash algorithms and combinations against unknown 128-bit hashes. There are no files, tests, or entry points identified; done would require agreeing on the supported algorithms, hash comparisons, input encodings, and GPU-side masking before implementation.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- c
- Domain
- cryptography, security
- Issue type
- Feature
- Difficulty
- 5/5
- Estimated time
- Over a week
- Activity status
- Stale
- Clarity
- Needs clarification
- Newbie friendliness
- 25/100