關於java3DES加密解密偏移量代碼示例

 

// 3DES加密
    public static String getEnc3DES(String data, String key, String iv) throws Exception {
        Cipher cipher = Cipher.getInstance("DESede/CBC/PKCS5Padding");
        DESedeKeySpec dks = new DESedeKeySpec(key.getBytes("gb2312"));
        IvParameterSpec ivs = new IvParameterSpec(iv.getBytes("gb2312"));
        SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DESede");
        SecretKey securekey = keyFactory.generateSecret(dks);
        cipher.init(Cipher.ENCRYPT_MODE, securekey, ivs);
        BASE64Encoder base64Encoder = new BASE64Encoder();
        return base64Encoder.encode(cipher.doFinal(data.getBytes("GB2312")));
    }

 

// 3DES解密
    public static String getDes3DES(String data, String key, String iv) throws Exception {
        BASE64Decoder base64Decoder = new BASE64Decoder();
        byte[] databyte = base64Decoder.decodeBuffer(data);
        Cipher cipher = Cipher.getInstance("DESede/CBC/PKCS5Padding");
        DESedeKeySpec dks = new DESedeKeySpec(key.getBytes("gb2312"));
        IvParameterSpec ivs = new IvParameterSpec(iv.getBytes("gb2312"));
        SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DESede");
        SecretKey securekey = keyFactory.generateSecret(dks);
        cipher.init(Cipher.DECRYPT_MODE, securekey, ivs);
        return new String(cipher.doFinal(databyte), "GB2312");
    }
    

 

　　說明：KEY值根據自己需求生成。IV偏移量也可以自己生成，此處只是舉個例子。傳入的參數data為json類型或其他，傳入時.toString（）一樣就可使用。

public static String KEY = "***";
    public static String subStr() throws Exception{
        String exOnceByTime = ExDateUtil.exOnceByTime(ExDateUtil.ExDate());//將2019-04-11 14:33:20 變成格式為20190411143320
        String IV = StringUtils.substring(exOnceByTime, 0, 8);
        return IV;
    }
    //解密數據
    public static JSONObject decode(JSONObject json) throws Exception{
        Object data = json.get("data");
        String des3des = getDes3DES(data.toString(), KEY, subStr());
        return JSONObject.fromObject(des3des);
    }