JAVA Encryption

[Cooltk63]

import javax.crypto.Cipher; import javax.crypto.SecretKey; import javax.crypto.spec.SecretKeySpec; import javax.swing.; import java.awt.; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.util.Base64;

public class AESEncryptionDecryptionApp {

private static final String ALGORITHM = "AES";
private static final String SECRET_KEY_STRING = "Tushar##248529";

public static SecretKey getSecretKeyFromString(String key) {
    // Pad the key to 16 bytes (128 bits)
    byte[] keyBytes = new byte[16];
    byte[] keyBytesOriginal = key.getBytes();

    // Copy the original key bytes into the padded key bytes
    System.arraycopy(keyBytesOriginal, 0, keyBytes, 0, Math.min(keyBytesOriginal.length, keyBytes.length));

    return new SecretKeySpec(keyBytes, ALGORITHM);
}

public static String encrypt(String text) throws Exception {
    SecretKey secretKey = getSecretKeyFromString(SECRET_KEY_STRING);

    Cipher cipher = Cipher.getInstance(ALGORITHM);
    cipher.init(Cipher.ENCRYPT_MODE, secretKey);
    byte[] encryptedBytes = cipher.doFinal(text.getBytes());
    return Base64.getEncoder().encodeToString(encryptedBytes);
}

public static String decrypt(String encryptedText) throws Exception {
    SecretKey secretKey = getSecretKeyFromString(SECRET_KEY_STRING);

    Cipher cipher = Cipher.getInstance(ALGORITHM);
    cipher.init(Cipher.DECRYPT_MODE, secretKey);
    byte[] decryptedBytes = cipher.doFinal(Base64.getDecoder().decode(encryptedText));
    return new String(decryptedBytes);
}

public static void main(String[] args) {
    JFrame frame = new JFrame("AES Encryption/Decryption");
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.setSize(400, 300);
    frame.setLayout(new GridLayout(6, 1));

    JTextField textField = new JTextField();
    JTextArea resultArea = new JTextArea();
    JRadioButton encryptButton = new JRadioButton("Encrypt");
    JRadioButton decryptButton = new JRadioButton("Decrypt");
    ButtonGroup group = new ButtonGroup();
    group.add(encryptButton);
    group.add(decryptButton);

    JButton executeButton = new JButton("Execute");

    frame.add(new JLabel("Enter Text:"));
    frame.add(textField);
    frame.add(encryptButton);
    frame.add(decryptButton);
    frame.add(executeButton);
    frame.add(new JLabel("Result:"));
    frame.add(new JScrollPane(resultArea));

    executeButton.addActionListener(new ActionListener() {
        @Override
        public void actionPerformed(ActionEvent e) {
            String text = textField.getText();
            try {
                if (encryptButton.isSelected()) {
                    String encryptedText = encrypt(text);
                    resultArea.setText(encryptedText);
                } else if (decryptButton.isSelected()) {
                    String decryptedText = decrypt(text);
                    resultArea.setText(decryptedText);
                }
            } catch (Exception ex) {
                ex.printStackTrace();
                resultArea.setText("Error: " + ex.getMessage());
            }
        }
    });

    frame.setVisible(true);
}

}

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