How can I construct a java.security.PublicKey object from a base64 encoded string?

Question

I have a bse64encoded string Public key from external source (Android Store) and I need to use it to verify signed content. How can I convert the string into an instance of

Answer 1

Try this....

PublicKey getPublicKey(byte[] encodedKey) throws NoSuchAlgorithmException, InvalidKeySpecException
{
    KeyFactory factory = KeyFactory.getInstance("RSA");
    X509EncodedKeySpec encodedKeySpec = new X509EncodedKeySpec(encodedKey);
    return factory.generatePublic(encodedKeySpec);
}