java DES加解密及Wrong key size錯誤

以下的DES加密方法會報錯：Wrong key size

 

public static String encryptDES(String source) throws Exception{ SecretKeySpec skeySpec = new SecretKeySpec(ckplayerkey.getBytes(), "DES"); Cipher cipher = Cipher.getInstance("DES/ECB/PKCS5Padding"); cipher.init(Cipher.ENCRYPT_MODE, skeySpec); byte[] encrypted = cipher.doFinal(source.getBytes("utf8")); String data=Base64.encodeBase64String(encrypted); return data; }

一開始覺得將AES加密方法中的關鍵字直接改成DES就是DES加密了，沒想到報錯 Wrong key size，由於前端是用cryptojs加密的，因此找到了一個答案：https://blog.csdn.net/king7950/article/details/70157463  根據該文章在java端加密成功~~

DES加密 關鍵代碼以下：

/** * DES加密 */
    public static String encodeDES(String datasource){ try{ SecureRandom random = new SecureRandom(); DESKeySpec desKey = new DESKeySpec(ckplayerkey.getBytes()); //建立一個密匙工廠，而後用它把DESKeySpec轉換成
            SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES"); SecretKey securekey = keyFactory.generateSecret(desKey); //Cipher對象實際完成加密操做
            Cipher cipher = Cipher.getInstance("DES/ECB/PKCS5Padding"); //用密匙初始化Cipher對象
 cipher.init(Cipher.ENCRYPT_MODE, securekey, random); //如今，獲取數據並加密
            return Base64.encodeBase64String(cipher.doFinal(datasource.getBytes())); }catch(Throwable e){ e.printStackTrace(); return null; } }

 

DES解密代碼（未測試）以下：

/** * DES解密 */
public String decodeDES(String src) throws Exception { // DES算法要求有一個可信任的隨機數源
    SecureRandom random = new SecureRandom(); // 建立一個DESKeySpec對象
    DESKeySpec desKey = new DESKeySpec(KEY.getBytes(CODE_TYPE)); // 建立一個密匙工廠
    SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES"); // 將DESKeySpec對象轉換成SecretKey對象
    SecretKey securekey = keyFactory.generateSecret(desKey); // Cipher對象實際完成解密操做
    Cipher cipher = Cipher.getInstance("DES"); // 用密匙初始化Cipher對象
 cipher.init(Cipher.DECRYPT_MODE, securekey, random); // 真正開始解密操做
    return IOUtils.toString(cipher.doFinal(Base64.decodeBase64(src)),"UTF-8"); }