java对称加密报错:Input length must be multiple of 8 when decrypting with padded cipher

最新推荐文章于 2022-07-12 15:25:08 发布

转载最新推荐文章于 2022-07-12 15:25:08 发布 · 2.4k 阅读

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#java #前端 #javascript #ViewUI

本文介绍了一种使用Blowfish算法进行数据加密和解密的方法，并解决了在Spring框架中遇到的因输入长度不是8的倍数而导致的IllegalBlockSizeException异常。

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HTTP Status 500 - Request processing failed; nested exception is javax.crypto.IllegalBlockSizeException: Input length must be multiple of 8 when decrypting with padded cipher org.springframework.web.util.NestedServletException: Request processing failed; nested exception is javax.crypto.IllegalBlockSizeException: Input length must be multiple of 8 when decrypting with padded cipher org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:894) org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:778) javax.servlet.http.HttpServlet.service(HttpServlet.java:621) javax.servlet.http.HttpServlet.service(HttpServlet.java:728)

Here is my Encryption and Decryption code

//secret key 8 
    private static String strkey ="Blowfish";

UPDATED

 //encrypt using blowfish algorithm
    public static byte[] encrypt(String Data)throws Exception{

        SecretKeySpec key = new SecretKeySpec(strkey.getBytes("UTF8"), "Blowfish");
         Cipher cipher = Cipher.getInstance("Blowfish");
         cipher.init(Cipher.ENCRYPT_MODE, key);

         return (cipher.doFinal(Data.getBytes("UTF8")));

    }

    //decrypt using blow fish algorithm
    public static String decrypt(byte[] encryptedData)throws Exception{
         SecretKeySpec key = new SecretKeySpec(strkey.getBytes("UTF8"), "Blowfish");
         Cipher cipher = Cipher.getInstance("Blowfish");
         cipher.init(Cipher.DECRYPT_MODE, key);
         byte[] decrypted = cipher.doFinal(encryptedData);
         return new String(decrypted); 

    }




import javax.crypto.Cipher;
import javax.crypto.spec.SecretKeySpec;

import org.apache.commons.codec.binary.Base64;


public class Test {

    private static String strkey ="Blowfish";
    private static Base64 base64 = new Base64(true);

     //encrypt using blowfish algorithm
    public static String encrypt(String Data)throws Exception{

        SecretKeySpec key = new SecretKeySpec(strkey.getBytes("UTF8"), "Blowfish");
         Cipher cipher = Cipher.getInstance("Blowfish");
         cipher.init(Cipher.ENCRYPT_MODE, key);

         return base64.encodeToString(cipher.doFinal(Data.getBytes("UTF8")));

    }

    //decrypt using blow fish algorithm
    public static String decrypt(String encrypted)throws Exception{
        byte[] encryptedData = base64.decodeBase64(encrypted);
         SecretKeySpec key = new SecretKeySpec(strkey.getBytes("UTF8"), "Blowfish");
         Cipher cipher = Cipher.getInstance("Blowfish");
         cipher.init(Cipher.DECRYPT_MODE, key);
         byte[] decrypted = cipher.doFinal(encryptedData);
         return new String(decrypted); 

    }

    public static void main(String[] args) throws Exception {
        String data = "will this work?";
        String encoded = encrypt(data);
        System.out.println(encoded);
        String decoded = decrypt(encoded);
        System.out.println(decoded);
    }
}

Hope this answers your questions.