public String decrypt(String data) {

        Objects.requireNonNull(data, "Data to be decrypted");

        if (!secretKeySpec.isPresent()) {
            return data;
        }

        // convert base64 encoded string to bytes
        byte[] decoded = Base64.decodeBase64(data);
        try {
            // decrypt bytes
            Cipher cipher = Cipher.getInstance(ALGORITHM);
            cipher.init(Cipher.DECRYPT_MODE, secretKeySpec.get());
            byte[] decrypted = cipher.doFinal(decoded);

            // convert bytes to string
            return new String(decrypted, StandardCharsets.UTF_8);

        } catch (InvalidKeyException ex) {
            logger.error(getHelperLogMessage(), ex);
            throw new RuntimeException(ex);
        } catch (GeneralSecurityException ex) {
            logger.error("Failed to decrypt data.", ex);
            return "";
        }
    }
public String decrypt(String data) {

        Objects.requireNonNull(data, "Data to be decrypted");

        if (!secretKeySpec.isPresent()) {
            return data;
        }

        
        byte[] decoded = Base64.decodeBase64(data);
        try {
            
            Cipher cipher = Cipher.getInstance(ALGORITHM);
            cipher.init(Cipher.DECRYPT_MODE, secretKeySpec.get());
            byte[] decrypted = cipher.doFinal(decoded);

            
            return new String(decrypted, StandardCharsets.UTF_8);

        } catch (InvalidKeyException ex) {
            logger.error(getHelperLogMessage(), ex);
            throw new RuntimeException(ex);
        } catch (GeneralSecurityException ex) {
            logger.error("Failed to decrypt data.", ex);
            return "";
        }
    }
public String decrypt ( String data ) { Objects . requireNonNull ( data , "Data to be decrypted" ) ; if ( ! secretKeySpec . isPresent ( ) ) { return data ; } // convert base64 encoded string to bytes byte [ ] decoded = Base64 . decodeBase64 ( data ) ; try { // decrypt bytes Cipher cipher = Cipher . getInstance ( ALGORITHM ) ; cipher . init ( Cipher . DECRYPT_MODE , secretKeySpec . get ( ) ) ; byte [ ] decrypted = cipher . doFinal ( decoded ) ; // convert bytes to string return new String ( decrypted , StandardCharsets . UTF_8 ) ; } catch ( InvalidKeyException ex ) { logger . error ( getHelperLogMessage ( ) , ex ) ; throw new RuntimeException ( ex ) ; } catch ( GeneralSecurityException ex ) { logger . error ( "Failed to decrypt data." , ex ) ; return "" ; } }
Decrypts data with secret key.

@param data text to decrypt in base64 format
@return decrypted text
Decrypts data with secret key .