Java:我的用于解密文本的系统无法正常工作

时间:2019-05-29 13:22:39

标签: java security encryption

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

  • 将加密的文本初始化为字节[]

  • 使用加密的文本初始化解密的文本

他只返回加密的文本,而不返回解密的文本。您有调试的想法吗?

谢谢。

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;
}

2 个答案:

答案 0 :(得分:2)

您可以使用getDecrypt(...)方法对加密的文本进行加密。还是您想用一种方法再次加密并解密它?

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

答案 1 :(得分:0)

我使用jasypt来加密密码。该方法非常简单。

BasicTextEncryptor textEncryptor = new BasicTextEncryptor();
textEncryptor.setPassword("some_Password_Maybe_generated_At_random");
...
String myEncryptedText = textEncryptor.encrypt(myText);
...
String plainText = textEncryptor.decrypt(myEncryptedText);

通常我不会将密码放在 source 中,而是将其保存在用户主目录中的文件中。

加密与用户主目录安全和私有一样强大。

此方法很好,因为它返回可以放入配置文件中的字符串。

正如我之前所说,它不是非常是安全的,只要 encryption password 是安全的,它将保护加密的文本。