[Ethereum] How to generate a new Ethereum address and private key from a command line

private-keyweb3js

How one can securely generate a new raw private key from a UNIX command line?

This private key can be then imported to wallet apps or web3.js.

Best Answer

If you have openssl installed, you can run

openssl rand -hex 32

Note: This will generate a 32 bytes sequence. It never verifies that the sequence is a valid private key.

There's a tiny possibility that some outputs will not generate a valid private key (a sequence of 32 zeros bytes), or a number above the elliptic curve order (FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFE BAAEDCE6 AF48A03B BFD25E8C D0364141).

If you are really paranoid, you should verify it is a valid private key.

Related Solutions

[Ethereum] How to get private key from account address and password

I used this code to recover the private key from account address and password. firstly, install Keythereum:

npm install keythereum

Keythereum is a JavaScript tool to generate, import and export Ethereum keys. read the documentation: GitHub Link

and this is my code:

var keythereum = require("keythereum");
var datadir = "/home/super/.ethereum/rinkeby";
var address= "0xc8096d713000002c77e4eb62f0000ead5f105a7e";
const password = "mypass";

var keyObject = keythereum.importFromFile(address, datadir);
var privateKey = keythereum.recover(password, keyObject);
console.log(privateKey.toString('hex'));

[Ethereum] Generate Ethereum address from a private key

There are some functions in web3p toolset, but I have no Idea if it will work.

https://github.com/web3p/ethereum-util/blob/0815348c3513e004d7dfa65ebeb31cda9d41f77e/src/Util.php#L133-L172

Best Answer

Related Solutions

[Ethereum] How to get private key from account address and password

[Ethereum] Generate Ethereum address from a private key

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