How can I read RSA keys in Java?

Question

I am trying to read the RSA public and private keys files in Java.

My RSA public and private key is generated using PuttyGen. (SSH-2 RSA, 1024 bits)

The code I a

Answer 1

Putty uses its own key format. You need to export the Putty key to the OpenSSH format - see How to convert SSH keypairs generated using PuttyGen(Windows) into key-pairs used by ssh-agent and KeyChain(Linux).

Then, you need to convert the OpenSSH key to pkcs8 format - see How to Load RSA Private Key From File. The Cygwin version of openssh will work just fine for this; there's no need to find a Unix system to run openssh.