Method decrypt

PasswordManagerGUI.java:141–159

(String masterPassword, String encryptedPassword)

    }

    private String decrypt(String masterPassword, String encryptedPassword) {
        try {
            byte[] combined = Base64.getDecoder().decode(encryptedPassword);
            byte[] salt = new byte[SALT_LENGTH];
            byte[] iv = new byte[IV_LENGTH];
            byte[] encrypted = new byte[combined.length - salt.length - iv.length];
            System.arraycopy(combined, 0, salt, 0, salt.length);
            System.arraycopy(combined, salt.length, iv, 0, iv.length);
            System.arraycopy(combined, salt.length + iv.length, encrypted, 0, encrypted.length);
            SecretKey key = deriveKey(masterPassword.toCharArray(), salt);
            Cipher cipher = Cipher.getInstance(CIPHER_ALGORITHM);
            cipher.init(Cipher.DECRYPT_MODE, key, new IvParameterSpec(iv));
            byte[] decrypted = cipher.doFinal(encrypted);
            return new String(decrypted);
        } catch (Exception e) {
            JOptionPane.showMessageDialog(this, "Decryption failed: " + e.getMessage(), "Error", JOptionPane.ERROR_MESSAGE);
            return null;
        }
    }

    @Override
    public void actionPerformed(ActionEvent e) {