https://github.com/joelparkerhenderson/sha256-sentence
SHA256 sentence: discover a SHA256 checksum that matches a sentence's description of hex digit words.
https://github.com/joelparkerhenderson/sha256-sentence
Last synced: 4 months ago
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SHA256 sentence: discover a SHA256 checksum that matches a sentence's description of hex digit words.
- Host: GitHub
- URL: https://github.com/joelparkerhenderson/sha256-sentence
- Owner: joelparkerhenderson
- Created: 2023-09-11T20:33:26.000Z (over 1 year ago)
- Default Branch: main
- Last Pushed: 2023-09-15T19:39:42.000Z (over 1 year ago)
- Last Synced: 2024-05-02T00:54:40.519Z (12 months ago)
- Language: Rust
- Homepage:
- Size: 19.5 KB
- Stars: 20
- Watchers: 3
- Forks: 1
- Open Issues: 0
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Metadata Files:
- Readme: README.md
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README
# SHA256 sentence
"The SHA256 for this sentence begins with: one, eight, two, a, seven, c and nine."
[Inspired by @lauriewired post](https://twitter.com/lauriewired/status/1700982575291142594)
[Inspired by @humblehack post](https://twitter.com/humblehack/status/1088982929940848647)
[Discussion on Hacker News](https://news.ycombinator.com/item?id=37465086)
This repo has Rust implementations of a coding challenge that searches for a sentence that describes its own SHA256 checksum.
This repo contains two Rust complete projects.
## Rust with basics
The [/rust-with-basics](/rust-with-basics) project directory demonstrates:
* Iteration via the standard library. This is without parallelization.
* Permutation via the itertools crate. This is without replacement.
* A local system time variable. This is without multi-thread safety.
Output:
```
milliseconds: 3, digest: "0b62c3f1bf41205f419fd37a3e028e65a054d6ba913b10711ef53073e9096c85", starts: "0b62", sentence: "The SHA256 for this sentence begins with: zero, b, six and two."
milliseconds: 54, digest: "0ed8f8c1e8ab4f84ee6503a39a9973e57cc6f7065862ac69c34a6126708b6269", starts: "0ed8f", sentence: "The SHA256 for this sentence begins with: zero, e, d, eight and f."
milliseconds: 8288, digest: "182a7c930b0e5227ff8d24b5f4500ff2fa3ee1a57bd35e52d98c6e24c2749ae0", starts: "182a7c9", sentence: "The SHA256 for this sentence begins with: one, eight, two, a, seven, c and nine."
``````
## Rust with extras
The [/rust-with-extras](rust-with-extras) project directory demonstrates:
* Parallel iteration via the `rayon` crate.
* Permutation with replacement via Rosetta code `permutation_with_replacement`.
* A global system time variable via `once_cell` single-initialization multi-thread safety.
Output:
```
milliseconds: 14, digest: "0b62c3f1bf41205f419fd37a3e028e65a054d6ba913b10711ef53073e9096c85", starts: "0b62", sentence: "The SHA256 for this sentence begins with: zero, b, six and two."
milliseconds: 698, digest: "f0dfc81ccecc48f6ee0a50ced43f3abe78d5c4ab2ccaa4f582d93d103ff7db90", starts: "f0dfc", sentence: "The SHA256 for this sentence begins with: f, zero, d, f and c."
milliseconds: 823, digest: "0ed8f8c1e8ab4f84ee6503a39a9973e57cc6f7065862ac69c34a6126708b6269", starts: "0ed8f", sentence: "The SHA256 for this sentence begins with: zero, e, d, eight and f."
milliseconds: 3077, digest: "443bd2f109b49619afa402953babe11b0d95eac073129a04ce89c37ca5c3e253", starts: "443bd2", sentence: "The SHA256 for this sentence begins with: four, four, three, b, d and two."
milliseconds: 125985, digest: "182a7c930b0e5227ff8d24b5f4500ff2fa3ee1a57bd35e52d98c6e24c2749ae0", starts: "182a7c9", sentence: "The SHA256 for this sentence begins with: one, eight, two, a, seven, c and nine."
…
```