AES/CBC/NOPADDING加解密[副本]

Question

我正在使用一个带有NFC的微控制器，所以我需要发送加密数据，为什么我使用AES/CBC/NOPADDING而我正在处理android应用html" target="_blank">程序，我有一个加密和解密的问题，这是我正在处理的代码

    String message="(*my_Log*y7VRMh5Wau80bRebLh/JaHMru/0Sj05E+lKUvT6d8Rw=*1604137444*19)111111111112";
    textView.setText("before encp:- "+message);
    try {
        String data=encrypt(message,"Thats my Kung Fu");
        Log.d("data after encode:-",data);
        textView.append("\n after encode:- \n"+data);
        String data2=decrypt(data,"Thats my Kung Fu");
        Log.d("data after decode:-",data2);
        textView.append("\n after decode:- \n"+data2);

    } catch (Exception e) {
        e.printStackTrace();
    }

}

@RequiresApi(api = Build.VERSION_CODES.O)
private String decrypt(String data, String key) throws Exception {
    SecretKeySpec skey = new SecretKeySpec(key.getBytes(), "AES");
    Cipher cipher=null;
    byte[] ivBytes = new byte[16];
    cipher = Cipher.getInstance("AES/CBC/PKCS7Padding");
    cipher.init(Cipher.DECRYPT_MODE,skey,new IvParameterSpec(ivBytes));
    byte[] decodeval=Base64.getDecoder().decode(data);
    byte[] decval= cipher.doFinal(decodeval);
    return new String(decval);

}

@RequiresApi(api = Build.VERSION_CODES.O)
private String encrypt(String message, String key) throws Exception{
    byte[] encval=null;
    SecretKeySpec skey = new SecretKeySpec(key.getBytes(), "AES");
    Cipher cipher = Cipher.getInstance("AES/CBC/NoPadding");
    cipher.init(Cipher.ENCRYPT_MODE,skey);
    encval=cipher.doFinal(message.getBytes());
    String encryptedValue = Base64.getEncoder().encodeToString(encval);
    return encryptedValue;

}

这是我的日志:-d/data ；after ；encode:-:zjsew6h+abzfkwna/pqpdzumnfhy0kmz2lxf23tdavim1c5l5oimagwxg6nrt0udciy/xeaehketf32+5wvq420/tsljaxer7ynj5+hgfmmo1qjhrwb8tzyuzmivokug

D/data ；解码后 ；:-:5 ts U0³U%WAU80BREBLH/JAHMRU/0SJ05E+LKUVT6D8RW=160413744419)111111111112

在编码字符串大小为80之前，在编码字符串大小为128之后，并且在十年之后，该字符串大小为80之前，也未完成解码

Answer 1

@RequiresApi(api = Build.VERSION_CODES.O)
private String encrypt(String message, String key) throws Exception{
    byte[] encval=null;
    SecretKeySpec skey = new SecretKeySpec(key.getBytes(), "AES");
    Cipher cipher = Cipher.getInstance("AES/CBC/NoPadding");
    byte[] ivBytes = new byte[16];
    cipher.init(Cipher.ENCRYPT_MODE,skey,new IvParameterSpec(ivBytes));   //iv here
    encval=cipher.doFinal(message.getBytes());
    String encryptedValue = Base64.getEncoder().encodeToString(encval);
    return encryptedValue;

}

您也必须提供加密的iv