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

    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.

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  • 原文地址:https://www.cnblogs.com/firstdream/p/5478450.html
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