Generate AES secret key

AES-RSA.java

public static void main(String[] args) {

    String plainText = "Very secret data";
    AES aesClient = new AES("client");
    SecretKey AESKey = aesClient.getEncodedSecret();
    RSA rsaClient = new RSA();
    byte[] RSAcipher = rsaClient.EncryptSecretKey(AESKey);
    String cipherData = aesClient.encryptAndSerialize(plainText);

    // Assume that client sends the cipherData and RSAcipher to the server...
    RSA serverRSA = new RSA();
    SecretKey AESkeyServer = rsaServer.decryptAESKey(RSAcipher);

    if (AESKey.equals(AESkeyServer)) System.out.println("equals");

    AES aesServer = new AES();
    String originalPlainText = aesServer.deserializeAndDecrypt(cipherData, AESkeyServer);
    System.out.println(originalPlainText);

    //voilaaa!
}

decryptAESKey.java

public SecretKey decryptAESKey(byte[] data) {
    SecretKey key = null;
    Cipher cipher = null;
    try {
        cipher = Cipher.getInstance("RSA/ECB/PKCS1Padding");
        cipher.init(Cipher.DECRYPT_MODE, privateKey);
        PBEKeySpec pbeKeySpec = new PBEKeySpec(AES.passPherase);
        SecretKeyFactory secretKeyFactory = SecretKeyFactory.getInstance(AES.algorithm);
        key = secretKeyFactory.generateSecret(pbeKeySpec);

    } catch (Exception e) {
        e.printStackTrace();
    }
    return key;
}

encryptSecretKey.java

public byte[] EncryptSecretKey(SecretKey secretKey) {
    Cipher cipher = null;
    byte[] key = null;
    try {
        cipher = Cipher.getInstance("RSA/ECB/PKCS1Padding");
        cipher.init(Cipher.ENCRYPT_MODE, publicKey);
        key = cipher.doFinal(secretKey.getEncoded());
    } catch (Exception e) {
        e.printStackTrace();
    }
    return key;
}

generateSecretKey.java

public SecretKey generateSecretKey(String password) {
    PBEParameterSpec pbeParamSpec = new PBEParameterSpec(salt, 20);
    PBEKeySpec pbeKeySpec = new PBEKeySpec(password);
    SecretKeyFactory secretKeyFactory = SecretKeyFactory.getInstance(algorithm);
    SecretKey secretKey = secretKeyFactory.generateSecret(pbeKeySpec);
    return secretKey;
}

getEncodedSecret.java

public SecretKey getEncodedSecret() throws Exception {
    PBEKeySpec pbeKeySpec = new PBEKeySpec(passPherase);
    SecretKeyFactory secretKeyFactory = SecretKeyFactory.getInstance(algorithm);
    SecretKey secretKey = secretKeyFactory.generateSecret(pbeKeySpec);
    return secretKey;
}