AES対称暗号化と復号化

/*
 * AES       
 */
public class SymmetricEncoder {
    /*
     *   
     * 1.       
     * 2.  ecnodeRules          
     * 3.    
     * 4.         
     * 5.    
     * 6.     
     */
    public static String AESEncode(String encodeRules,String content){
        try {
            //1.       ，   AES  ,      
            KeyGenerator keygen= KeyGenerator.getInstance("AES");
            //2.  ecnodeRules          
            //      ，  Linux                
            SecureRandom secureRandom = SecureRandom.getInstance("SHA1PRNG");
            secureRandom.setSeed(encodeRules.getBytes());
            //    128     ,         
            //keygen.init(128, new SecureRandom(encodeRules.getBytes()));
            //         ，       
            keygen.init(128, secureRandom);
            //3.        
            SecretKey original_key=keygen.generateKey();
            //4.             
            byte [] raw=original_key.getEncoded();
            //5.        AES  
            SecretKey key=new SecretKeySpec(raw, "AES");
            //6.      AES     
            Cipher cipher=Cipher.getInstance("AES");
            //7.      ，        (Encrypt_mode)      (Decrypt_mode)  ，         KEY
            cipher.init(Cipher.ENCRYPT_MODE, key);
            //8.           (      utf-8)                        
            byte [] byte_encode=content.getBytes("utf-8");
            //9.           --  ：     
            byte [] byte_AES=cipher.doFinal(byte_encode);
            //10.             
            //   Base64Encoder      
            //    ：
            //    Build path    JRE System Library，    JRE System Library，           。
            String AES_encode=new String(new BASE64Encoder().encode(byte_AES));
            //11.      
            return AES_encode;
        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
        } catch (NoSuchPaddingException e) {
            e.printStackTrace();
        } catch (InvalidKeyException e) {
            e.printStackTrace();
        } catch (IllegalBlockSizeException e) {
            e.printStackTrace();
        } catch (BadPaddingException e) {
            e.printStackTrace();
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        }

        //       nulll
        return null;
    }
    /*
     *   
     *     ：
     * 1.   1-4 
     * 2.           byte[]  
     * 3.       
     */
    public static String AESDncode(String encodeRules,String content){
        try {
            //1.       ，   AES  ,      
            KeyGenerator keygen=KeyGenerator.getInstance("AES");
            //2.  ecnodeRules          
            //      ，  Linux                
            SecureRandom secureRandom = SecureRandom.getInstance("SHA1PRNG");
            secureRandom.setSeed(encodeRules.getBytes());
            //    128     ,         
            //keygen.init(128, new SecureRandom(encodeRules.getBytes()));
            //         ，       
            keygen.init(128, secureRandom);
            //3.        
            SecretKey original_key=keygen.generateKey();
            //4.             
            byte [] raw=original_key.getEncoded();
            //5.        AES  
            SecretKey key=new SecretKeySpec(raw, "AES");
            //6.      AES     
            Cipher cipher=Cipher.getInstance("AES");
            //7.      ，        (Encrypt_mode)    (Decrypt_mode)  ，         KEY
            cipher.init(Cipher.DECRYPT_MODE, key);
            //8.                 
            byte [] byte_content= new BASE64Decoder().decodeBuffer(content);
			            /*
			             *   
			             */
            byte [] byte_decode=cipher.doFinal(byte_content);
            String AES_decode=new String(byte_decode,"utf-8");
            return AES_decode;
        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
        } catch (NoSuchPaddingException e) {
            e.printStackTrace();
        } catch (InvalidKeyException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } catch (IllegalBlockSizeException e) {
            e.printStackTrace();
        } catch (BadPaddingException e) {
            e.printStackTrace();
        }

        //       nulll
        return null;
    }

    public static void main(String[] args) {
        SymmetricEncoder se=new SymmetricEncoder();
        Scanner scanner=new Scanner(System.in);
			        /*
			         *   
			         */
        System.out.println("  AES    ，       ");
        String encodeRules=scanner.next();
        System.out.println("         :");
        String content = scanner.next();
        System.out.println("       "+encodeRules+"       :"+se.AESEncode(encodeRules, content));

			        /*
			         *   
			         */
        System.out.println("  AES    ，       ：(      )");
        encodeRules=scanner.next();
        System.out.println("         （  ）:");
        content = scanner.next();
        System.out.println("       "+encodeRules+"       :"+se.AESDncode(encodeRules, content));


        //        String encodeRules="xingz";
        //        String contentIn = "hahaha";
        //        System.out.println("       "+encodeRules+"       :"+se.AESEncode(encodeRules, contentIn));
        //        System.out.println("       "+encodeRules+"       :"+se.AESDncode(encodeRules, se.AESEncode(encodeRules, contentIn)));
    }

}