https://github.com/vocdoni/keccak256-circom

keccak256 hash implementation in Circom
https://github.com/vocdoni/keccak256-circom

Last synced: about 1 month ago
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keccak256 hash implementation in Circom

• Host: GitHub
• URL: https://github.com/vocdoni/keccak256-circom
• Owner: vocdoni
• License: gpl-3.0
• Created: 2021-10-31T11:32:01.000Z (about 3 years ago)
• Default Branch: master
• Last Pushed: 2022-04-24T14:12:03.000Z (over 2 years ago)
• Last Synced: 2024-08-03T08:02:35.394Z (4 months ago)
• Language: JavaScript
• Size: 117 KB
• Stars: 73
• Watchers: 5
• Forks: 16
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

Awesome Lists containing this project

• awesome-circom - keccak256-circom - keccak256 implementation (Cryptographic primitives / Cryptographic primitives in Circom)

README

        
# keccak256-circom [![Test](https://github.com/vocdoni/keccak256-circom/workflows/Test/badge.svg)](https://github.com/vocdoni/keccak256-circom/actions?query=workflow%3ATest)

Keccak256 hash function (ethereum version) implemented in [circom](https://github.com/iden3/circom). Spec: https://nvlpubs.nist.gov/nistpubs/FIPS/NIST.FIPS.202.pdf

**Warning**: WIP, this is an experimental repo.

## Status

Initial version works, compatible with Ethereum version of Keccak256.

It needs around `150848` (`151k`) constraints. 

> For context: [Rapidsnark](https://github.com/iden3/rapidsnark) proof generation time:

> - 1.1M constraints -> 7 seconds (8 CPU)

> - 128M constraints -> <2min (64 CPU)

## Usage

- import the lib in the `package.json`:

```

"dependencies": {

	"keccak256-circom": "git+https://github.com/vocdoni/keccak256-circom"

}

```

- Usage:

```

pragma circom 2.0.0;

include "../node_modules/keccak256-circom/circuits/keccak.circom";

// for a input & output of 32 bytes:

component main = Keccak(32*8, 32*8);

```