runSecp265k1

This tool let you decode Ethereum Secp265k1 signatures in a terminal.

Install

Requires node & npm.

git clone https://github.com/digitaldonkey/secp256k1-bash.git
npm install

Usage

There are 2 variants. The later one is compatible with Ethereum ecrecover (ecrecover(msgHash, v, r, s)).

Last param will print debug output too.

node runSecp265k1 <message hash> <signature> [true]
node runSecp265k1 <message hash> <v> <r> <s> [true]

Return value is the Ethereum's public address (as Hex string).

Examples

Call EcRecover like in solidity

node runSecp265k1.js 0xdc0e5f8d3edf066da77f7a5664ca95fc75854567901aca68abb36987a46021b7 0x1b 0x627c13c55329e7eb3b377930e00b1186bf3115a9b4a45218eb8530caefbf1255 0x02edfaeb33a4c5f848b55ad5438c6e50160397bd47811f70df2173e536b4dd2c

0x4097752d39b5fb5c9b2490d53fb3d50f355dad7a

Decode given signature

node runSecp265k1.js 0xdc0e5f8d3edf066da77f7a5664ca95fc75854567901aca68abb36987a46021b7 0x627c13c55329e7eb3b377930e00b1186bf3115a9b4a45218eb8530caefbf125502edfaeb33a4c5f848b55ad5438c6e50160397bd47811f70df2173e536b4dd2c1b

0x4097752d39b5fb5c9b2490d53fb3d50f355dad7a