Encriptar Y Desencriptar Texto En Java (Sin Errores De SonarQube)

Hola,

Si requieren realizar la encriptación de una cadena y luego desencriptar esa cadena sin que se les genere errores o advertencias del SonarQube, pueden utilizar los siguientes métodos: 

Método para encriptar una cadena:

 /**

 * variables for text encryption
 */
private static final int GCM_IV_LENGTH = 12;
private static final int GCM_TAG_LENGTH = 16;

/**
 * Method in charge of encrypting a text, using the AES SecretKey.
 *
 * @param pText Define the text to encrypt
 * @return a String with the encrypted text
 */
public static String encryptedText(String pText) {

    String encryptedBase64 = null;

    /*
     * key is 16 zero bytes
     */
    SecretKey secretKey = new SecretKeySpec(new byte[16], "AES");

    try {

        byte[] iv = new byte[GCM_IV_LENGTH];
        (new SecureRandom()).nextBytes(iv);

        Cipher cipher = Cipher.getInstance("AES/GCM/NoPadding");
        GCMParameterSpec ivSpec = new GCMParameterSpec(GCM_TAG_LENGTH * Byte.SIZE, iv);
        cipher.init(Cipher.ENCRYPT_MODE, secretKey, ivSpec);

        byte[] cipherText = cipher.doFinal(pText.getBytes(StandardCharsets.UTF_8));
        byte[] encrypted = new byte[iv.length + cipherText.length];
        System.arraycopy(iv, 0, encrypted, 0, iv.length);
        System.arraycopy(cipherText, 0, encrypted, iv.length, cipherText.length);

        encryptedBase64 = Base64.encodeBase64String(encrypted);

    } catch (NoSuchAlgorithmException | InvalidAlgorithmParameterException | InvalidKeyException | BadPaddingException
            | IllegalBlockSizeException | NoSuchPaddingException e) {
        // Do nothing
    }

    return encryptedBase64;

}


Método para desencriptar una cadena:

/**
 * Method in charge of decrypting a text, using the AES SecretKey.
 *
 * @param pTextEncrypted Define the text to decrypt
 * @return a String with the decrypted text
 */
public static String decryptedText(String pTextEncrypted) {

    String decryptedBase64 = null;

    /*
     * key is 16 zero bytes
     */
    SecretKey secretKey = new SecretKeySpec(new byte[16], "AES");

    try {

        byte[] decoded = Base64.decodeBase64(pTextEncrypted);

        byte[] iv = Arrays.copyOfRange(decoded, 0, GCM_IV_LENGTH);

        Cipher cipher = Cipher.getInstance("AES/GCM/NoPadding");
        GCMParameterSpec ivSpec = new GCMParameterSpec(GCM_TAG_LENGTH * Byte.SIZE, iv);
        cipher.init(Cipher.DECRYPT_MODE, secretKey, ivSpec);

        byte[] cipherText = cipher.doFinal(decoded, GCM_IV_LENGTH, decoded.length - GCM_IV_LENGTH);

        decryptedBase64 = new String(cipherText, StandardCharsets.UTF_8);

    } catch (NoSuchAlgorithmException | InvalidAlgorithmParameterException | InvalidKeyException | BadPaddingException
            | IllegalBlockSizeException | NoSuchPaddingException e) {
        // Do nothing
    }

    return decryptedBase64;

}

Para invocar estos métodos, utilicen el siguiente código:

public static void main(String[] args) {
    String miTextoAEncriptar = encryptedText("Esto es una prueba de lo que quiero encriptar.");
    System.out.println("Texto encriptado: " + miTextoAEncriptar);
    
    String miTextoADesEncriptar = decryptedText(miTextoAEncriptar);
    System.out.println("Texto desencriptado: " + miTextoADesEncriptar);
}