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java - Java：我的文本解密系统不起作用

问题描述

我有一个用于加密文本的系统，但我试图创建一个用于解密文本的系统，但它不起作用。该系统是：

他只返回加密的文本，而不是解密的文本。你有调试这个的想法吗？

提前致谢。

byte[] getEncrypt(String text) throws NoSuchPaddingException, NoSuchAlgorithmException, InvalidKeyException, BadPaddingException, IllegalBlockSizeException
{
    String key = "Bép12345Taruy'(";

    Key aesKey = new SecretKeySpec(key.getBytes(), "AES");
    Cipher cipher = Cipher.getInstance("AES");

    cipher.init(Cipher.ENCRYPT_MODE, aesKey);
    byte[] encrypted = cipher.doFinal(text.getBytes());

    return encrypted;
}

String getDecrypt(String text) throws NoSuchPaddingException, NoSuchAlgorithmException, InvalidKeyException, BadPaddingException, IllegalBlockSizeException
{
    String key = "Bép12345Taruy'(";

    Key aesKey = new SecretKeySpec(key.getBytes(), "AES");
    Cipher cipher = Cipher.getInstance("AES");

    cipher.init(Cipher.ENCRYPT_MODE, aesKey);
    byte[] encrypted = cipher.doFinal(text.getBytes());

    cipher.init(Cipher.DECRYPT_MODE, aesKey);
    String decrypted = new String(cipher.doFinal(encrypted));

    return decrypted;
}

标签： javasecurityencryption

解决方案

您在getDecrypt(...)方法中加密加密文本。还是您想以一种方法再次对其进行加密和解密？

一种解决方案是以下代码：

package test;

import java.security.InvalidKeyException;
import java.security.Key;
import java.security.NoSuchAlgorithmException;

import javax.crypto.BadPaddingException;
import javax.crypto.Cipher;
import javax.crypto.IllegalBlockSizeException;
import javax.crypto.NoSuchPaddingException;
import javax.crypto.spec.SecretKeySpec;

public class Test2{        

    public static void main(String[] args) throws InvalidKeyException, NoSuchPaddingException, NoSuchAlgorithmException, BadPaddingException, IllegalBlockSizeException {
        System.out.println(new String(getEncrypt("test")));
        System.out.println(new String(getDecrypt(getEncrypt("test"))));
        
    }

    public static byte[] getEncrypt(String text) throws NoSuchPaddingException, NoSuchAlgorithmException, InvalidKeyException, BadPaddingException, IllegalBlockSizeException {
        String key = "Bép12345Taruy'(";

        Key aesKey = new SecretKeySpec(key.getBytes(), "AES");
        Cipher cipher = Cipher.getInstance("AES");

        cipher.init(Cipher.ENCRYPT_MODE, aesKey);
        byte[] encrypted = cipher.doFinal(text.getBytes());

        return encrypted;
    }

    public static byte [] getDecrypt(byte[] encrypted) throws NoSuchPaddingException, NoSuchAlgorithmException, InvalidKeyException, BadPaddingException, IllegalBlockSizeException {
        String key = "Bép12345Taruy'(";

        Key aesKey = new SecretKeySpec(key.getBytes(), "AES");
        Cipher cipher = Cipher.getInstance("AES");

        cipher.init(Cipher.DECRYPT_MODE, aesKey);
        return cipher.doFinal(encrypted);
    }
    
}

输出：

�'����+~�@��@w

测试

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