sign and verify

generate.sh

#!/bin/bash

ssh-keygen -f $1 -b 1022 -q
ssh-keygen -e -f $1.pub -m PEM > $1.pem

gistfile1.txt

$ ./generate.sh beep
Enter passphrase (empty for no passphrase): 
Enter same passphrase again: 
$ node sign.js
KXJe7//FttpCILzQFfZs5xWu55DzQT8sYJ+q0r775fTSvlFjgs51EFOu3oLouAKZtVygQ7Je1uGxeJ62GZY0H7a0GD9zYPVrSatdWSHDFl7udeZdlyaePJNhM0TSBXQOxeAydoUMaolgajkLFz32Znl4JnMmx0BD0BewsMayWQI=
true
$ 

sign.js

var crypto = require('crypto');
var fs = require('fs');

var key = {
    priv : fs.readFileSync(__dirname + '/beep'),
    pub : fs.readFileSync(__dirname + '/beep.pem'),
};

var signer = crypto.createSign('RSA-SHA1');
signer.update('beep boop');

var s = signer.sign(key.priv, 'base64');
console.log(s);

var v = crypto.createVerify('RSA-SHA1')
    .update('beep boop')
    .verify(key.pub, s, 'base64');
;
console.log(v);