Comment by zrail

It doesn't appear to be a new implementation. It looks like it uses Node's crypto lib:

https://nodejs.org/api/crypto.html#crypto_crypto_publicencry...

Not sure why it says DSA is supported, the crypto library only supports RSA.

It uses this library that stitches together a PEM from an ssh public key:

https://github.com/dominictarr/ssh-key-to-pem/blob/master/in...