var RSA = require('rsa-compat').RSA; var fs = require('fs'); RSA.generateKeypair(2048, 65537, {}, function (err, keypair) { console.log(keypair); var privkeyPem = RSA.exportPrivatePem(keypair) console.log(privkeyPem); fs.writeFileSync(__dirname + '/account.privkey.pem', privkeyPem); }); RSA.generateKeypair(2048, 65537, {}, function (err, keypair) { console.log(keypair); var privkeyPem = RSA.exportPrivatePem(keypair) console.log(privkeyPem); fs.writeFileSync(__dirname + '/privkey.pem', privkeyPem); });