getSecretKey.java

public static final int PBE_ITERATION_COUNT = 10000; //Am not sure on this size and low end devices. I should test more to prevent lag
private static final String PBE_ALGORITHM = "PBKDF2WithHmacSHA1";
public static final String PROVIDER = "BC";
private static final String SECRET_KEY_ALGORITHM = "AES/GCM/NoPadding;

public static SecretKey getSecretKey(String password, String salt) throws CryptoException {
            try {
                    PBEKeySpec pbeKeySpec = new PBEKeySpec(password.toCharArray(), Util.HexEncoder.toByte(salt), PBE_ITERATION_COUNT, 256);
                    SecretKeyFactory factory = SecretKeyFactory.getInstance(PBE_ALGORITHM, PROVIDER);
                    SecretKey tmp = factory.generateSecret(pbeKeySpec);
                    SecretKey secret = new SecretKeySpec(tmp.getEncoded(), SECRET_KEY_ALGORITHM);
                    return secret;
            } catch (Exception e) {
                    throw new CryptoException("Unable to get secret key", e);
            }
    }