How to convert from String to PublicKey?

Question

I\'ve used the following code to convert the public and private key to a string

KeyPairGenerator keyPairGen = KeyPairGenerator.getInstance(\"RSA\");
keyPairG         


        

Answer 1

I don't think you can use the SecretKeySpec with RSA.

This should do:

byte[] publicBytes = Base64.decodeBase64(publicK);
X509EncodedKeySpec keySpec = new X509EncodedKeySpec(publicBytes);
KeyFactory keyFactory = KeyFactory.getInstance("RSA");
PublicKey pubKey = keyFactory.generatePublic(keySpec);

And to decode the private use PKCS8EncodedKeySpec