AES javafx 程序在按下加密按钮期间显示错误

Question

使用 javafx 实施 AES 算法 "well am trying to implement" 但是当我编译代码时它没有给我任何错误但是当我按下加密按钮时它会在命令行中显示一堆错误

代码如下

import javafx.application.Application;
import javafx.application.Platform;
import javafx.stage.*;
import javafx.scene.*;
import javafx.scene.control.*;
import javafx.scene.layout.*;
import javafx.geometry.*;
import javafx.scene.image.*;
import java.io.UnsupportedEncodingException;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.util.Arrays;
import sun.misc.BASE64Encoder;
import sun.misc.BASE64Decoder;
import java.security.Key;
import javax.crypto.Cipher;
import javax.crypto.Cipher;
import javax.crypto.spec.SecretKeySpec;

public class AESGui extends Application{

    TextArea inputArea = new TextArea();
    TextArea outputArea = new TextArea();
    Main object1 = new Main();

    public static void main(String [] args){
        launch (args);
    }


    @Override
    public void start(Stage stage){

        HBox hbox1 = new HBox(50);
        hbox1.setAlignment(Pos.CENTER);
        hbox1.getChildren().addAll(inputArea, outputArea);

        Button encrypt = new Button("Encrypt");
        encrypt.setOnAction (event -> {
            object1.aesEncryption();
        });

        Button decrypt = new Button("Decrypt");

        HBox hbox2 = new HBox(50);
        hbox2.setAlignment(Pos.CENTER);
        hbox2.getChildren().addAll(encrypt, decrypt);

        VBox vbox = new VBox();
        vbox.setAlignment(Pos.CENTER);
        vbox.getChildren().addAll(hbox1, hbox2);

        Scene scene = new Scene(vbox, 900, 700);

        stage.setScene(scene);
        stage.setTitle("aes gui");
        stage.show();
    }

    public class AESAlgorithm{
        public String algo = "AES";
        public byte[] keyValue;

        public AESAlgorithm(String key){
            keyValue = key.getBytes();
        }

        public Key generateKey() throws Exception{
            Key key = new SecretKeySpec(keyValue, algo);
            return key;
        }

        public String encrypt(String msg) throws Exception{

            Key key = generateKey();
            Cipher c = Cipher.getInstance(algo);
            c.init(Cipher.ENCRYPT_MODE, key);
            byte[] encVal = c.doFinal(msg.getBytes());
            String encryptedValue = new BASE64Encoder().encode(encVal);
            return encryptedValue;

        }

        public String decrypt(String msg) throws Exception{

            Key key = generateKey();
            Cipher c = Cipher.getInstance(algo);
            c.init(Cipher.DECRYPT_MODE, key);
            byte[] decordedValue = new BASE64Decoder().decodeBuffer(msg);
            byte[] decValue = c.doFinal(decordedValue);
            String decryptedValue = new String(decValue);
            return decryptedValue;
        }
    }

    public class Main {
        AESAlgorithm aesAlgo;
        private byte[] keyValue = new byte[]{'t','h','e','b','e','s','t','s','e','c','r','e','t','k','e','y'};
        public Main(){
            //initComponents();
            //here we passed key to constructor
            aesAlgo = new AESAlgorithm("MySecretKey");
        }

        private void aesEncryption(){
            try{

                String plainText = inputArea.getText();
                String encryptedText = aesAlgo.encrypt(plainText);
                outputArea.setText(encryptedText);

            }
            catch(Exception e){
                e.printStackTrace();
            }
        }

    }
}

当我按下加密按钮时 cmd 的输出是

java.security.InvalidKeyException: Invalid AES key length: 11 bytes
at com.sun.crypto.provider.AESCipher.engineGetKeySize(AESCipher.java:509)
at javax.crypto.Cipher.passCryptoPermCheck(Cipher.java:1067)
at javax.crypto.Cipher.checkCryptoPerm(Cipher.java:1025)
at javax.crypto.Cipher.implInit(Cipher.java:801)
at javax.crypto.Cipher.chooseProvider(Cipher.java:864)
at javax.crypto.Cipher.init(Cipher.java:1249)
at javax.crypto.Cipher.init(Cipher.java:1186)
at AESGui$AESAlgorithm.encrypt(AESGui.java:79)
at AESGui$Main.aesEncryption(AESGui.java:111)
at AESGui$Main.access[=11=]0(AESGui.java:98)
at AESGui.lambda$start[=11=](AESGui.java:42)
at com.sun.javafx.event.CompositeEventHandler.dispatchBubblingEvent(CompositeEventHandler.java:86)
at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:238)
at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:191)
at com.sun.javafx.event.CompositeEventDispatcher.dispatchBubblingEvent(CompositeEventDispatcher.java:59)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:58)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at com.sun.javafx.event.EventUtil.fireEventImpl(EventUtil.java:74)
at com.sun.javafx.event.EventUtil.fireEvent(EventUtil.java:49)
at javafx.event.Event.fireEvent(Event.java:198)
at javafx.scene.Node.fireEvent(Node.java:8413)
at javafx.scene.control.Button.fire(Button.java:185)
at com.sun.javafx.scene.control.behavior.ButtonBehavior.mouseReleased(ButtonBehavior.java:182)
at com.sun.javafx.scene.control.skin.BehaviorSkinBase.handle(BehaviorSkinBase.java:96)
at com.sun.javafx.scene.control.skin.BehaviorSkinBase.handle(BehaviorSkinBase.java:89)
at com.sun.javafx.event.CompositeEventHandler$NormalEventHandlerRecord.handleBubblingEvent(CompositeEventHandler.java:218)
at com.sun.javafx.event.CompositeEventHandler.dispatchBubblingEvent(CompositeEventHandler.java:80)
at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:238)
at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:191)
at com.sun.javafx.event.CompositeEventDispatcher.dispatchBubblingEvent(CompositeEventDispatcher.java:59)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:58)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at com.sun.javafx.event.EventUtil.fireEventImpl(EventUtil.java:74)
at com.sun.javafx.event.EventUtil.fireEvent(EventUtil.java:54)
at javafx.event.Event.fireEvent(Event.java:198)
at javafx.scene.Scene$MouseHandler.process(Scene.java:3757)
at javafx.scene.Scene$MouseHandler.access00(Scene.java:3485)
at javafx.scene.Scene.impl_processMouseEvent(Scene.java:1762)
at javafx.scene.Scene$ScenePeerListener.mouseEvent(Scene.java:2494)
at com.sun.javafx.tk.quantum.GlassViewEventHandler$MouseEventNotification.run(GlassViewEventHandler.java:381)
at com.sun.javafx.tk.quantum.GlassViewEventHandler$MouseEventNotification.run(GlassViewEventHandler.java:295)
at java.security.AccessController.doPrivileged(Native Method)
at com.sun.javafx.tk.quantum.GlassViewEventHandler.lambda$handleMouseEvent4(GlassViewEventHandler.java:417)
at com.sun.javafx.tk.quantum.QuantumToolkit.runWithoutRenderLock(QuantumToolkit.java:389)
at com.sun.javafx.tk.quantum.GlassViewEventHandler.handleMouseEvent(GlassViewEventHandler.java:416)
at com.sun.glass.ui.View.handleMouseEvent(View.java:555)
at com.sun.glass.ui.View.notifyMouse(View.java:937)
at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
at com.sun.glass.ui.win.WinApplication.lambda$null8(WinApplication.java:191)
at java.lang.Thread.run(Unknown Source)

Answer 1

您的密钥太短。 AES 适用于 128 位、192 位和 256 位密钥。

您已经定义了keyValue，这是一个16字节的数组（16*8 = 128bit）。请改用它。

public class Main {
        AESAlgorithm aesAlgo;
        private byte[] keyValue = new byte[]{'t','h','e','b','e','s','t','s','e','c','r','e','t','k','e','y'};
        public Main(){
            //initComponents();
            //here we passed key to constructor
            aesAlgo = new AESAlgorithm(keyValue);
        }

        private void aesEncryption(){
            try{

                String plainText = inputArea.getText();
                String encryptedText = aesAlgo.encrypt(plainText);
                outputArea.setText(encryptedText);

            }
            catch(Exception e){
                e.printStackTrace();
            }
        }

    }

AES javafx 程序在按下加密按钮期间显示错误

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