Generate a fingerprint given an SSH public key (without ssh-keygen or external dependencies)

npm install ssh-fingerprint

var fs = require('fs');

var fingerprint = require('ssh-fingerprint');

var publickey = fs.readFileSync('id_rsa.pub', 'utf-8');

console.log('fingerprint => %s', fingerprint(publickey));

yields

fingerprint => 64:c4:c5:c9:7e:91:91:db:e3:35:ca:de:be:84:2e:b0

Parameters

• pubkey: A public key string, typically read from id_rsa.pub
• algorithm: Hashing algorithm to use, defaults to md5 (OpenSSH Standard)

Returns

• The stringified fingerprint, same as ssh-keygen -fl id_rsa.pub

MIT