How to generate ssh compatible id_rsa(.pub) from Java

Question

I\'m looking for a way to programmatically create ssh compatible id_rsa and id_rsa.pub files in Java.

I got as far as creating the KeyPair:

KeyPairG         


        

Answer 1

The generic solution for any PublicKey type (RSA, DSA, etc.) is a one-liner using SSHJ:

byte[] b = new Buffer.PlainBuffer().putPublicKey(key).getCompactData()

and then encode using Base64.getEncoder().encodeToString(b).