如何使用java netbeans在文本框中设置结果 [英] How to set result in textbox using java netbeans

问题描述

我正在尝试开发用户将在文本框（明文）中输入文本的程序，然后用户必须选择一个按键（key_128）（key_192）（key_256）然后它会点击按钮（encrypt_data）到加密用户输入的文本。然后它将在另一个文本框中显示输出（加密）

这是我正在处理的源代码

I’m trying to develop program that the user will enter a text in textbox (plaintext) then the user have to select a key buttons (key_128) (key_192) (key_256) then it will click on button (encrypt_data) to encrypt the text that the user entered. Then it will show the output in another textbox (encrypt)
This is the source code I’m working on

public class MARS extends javax.swing.JFrame {

    static Cipher cipher;
	
	private static int[] K;
        

	private static final int [] s_box ={
// s_box values here
	};
	
	private static int rotl(int val, int pas) {
		return (val << pas) | (val >>> (32 - pas));
	}
	private static int rotr(int val, int pas) {
		return (val >>> pas) | (val << (32-pas));
	}
	
	
	private static int[] expandKey(byte[] key){
		int n = key.length/4;
		int[] tmp = new int[40];
		int[] data = new int[n];
		
		for(int i =0;i<data.length;i++)
			data[i] = 0;
		
		int off = 0;
		for(int i=0;i<data.length;i++){
			data[i] = 	((key[off++]&0xff))|
						((key[off++]&0xff) << 8) |
						((key[off++]&0xff) << 16) |
						((key[off++]&0xff) << 24);
		}
		
		int[] T = new int[15];
		for(int i=0;i<T.length;i++){
			if(i<data.length) T[i] = data[i];
			else if(i == data.length) T[i] = n;
			else T[i] = 0;
		}
		
		for(int j=0;j<4;j++){
			for(int i=0;i<T.length;i++)
				T[i] = T[i] ^ (rotl(T[Math.abs(i-7 %15)] ^ T[Math.abs(i-2 %15)],3) ^ (4*i+j));
			for(int c=0;c<4;c++)
				for(int i=0;i<T.length;i++)
					T[i] = T[i] + rotl(s_box[(int)(T[Math.abs(i-1%15)] & 0x000001ff)],9);
			for(int i = 0;i<=9;i++) tmp[10*j+i] = T[4*i%15];
		}
		
		int[] B = {0xa4a8d57b, 0x5b5d193b, 0xc8a8309b, 0x73f9a978};
		int j,w,m,r,p;
		for(int i = 5;i<=35;i++){
			j = tmp[i] & 0x00000003;
			w = tmp[i] | 0x00000003;
			m = generateMask(w);
			r = tmp[i-1] & 0x0000001f;
			p = rotl(B[j],r);
			tmp[i] = w ^ (p & m); 
		}
		
		return tmp;
	}
	
	private static int generateMask(int x){
		int m;
		
		m = (~x ^ (x>>>1)) & 0x7fffffff;
		m &= (m >> 1) & (m >> 2); 
		m &= (m >> 3) & (m >> 6); 
		    
		if(m == 0) 
			return 0;

		m <<= 1; m |= (m << 1); m |= (m << 2); m |= (m << 4);

		m |= (m << 1) & ~x & 0x80000000;

		return m & 0xfffffffc;

	}
	
	
	public static byte[] encryptBloc(byte[] in){
		byte[] tmp =  new byte[in.length];
		int aux;

		
		int[] data = new int[in.length/4];
		for(int i =0;i<data.length;i++)
			data[i] = 0;
		int off = 0;
		for(int i=0;i<data.length;i++){
			data[i] = 	((in[off++]&0xff))|
						((in[off++]&0xff) << 8) |
						((in[off++]&0xff) << 16) |
						((in[off++]&0xff) << 24);
		}
	
		int A = data[0],B = data[1],C = data[2],D = data[3];
		A = A + K[0];
		B = B + K[1];
		C = C + K[2];
		D = D + K[3];
		
		//forward mixing
		for(int i = 0;i<=7;i++){
			B = B ^ s_box[A & 0xff];
			B = B + s_box[(rotr(A,8) & 0xff) + 256]; 
            C = C + s_box[rotr(A,16) & 0xff]; 
            D = D ^ s_box[(rotr(A,24) & 0xff) + 256]; 
            
            A = rotr(A,24);
            
            if(i == 1 || i == 5) A = A + B;
            if(i == 0 || i == 4) A = A + D;
            
            aux = A;
			A = B;
			B = C;
			C = D;
			D = aux;
		}
		int R,L,M;
		int[] eout;
		//cryptographic core
		for(int i = 0;i<=15;i++){
			
			eout = E_func(A, K[2*i+4], K[2*i+5]);
			
			A = rotl(A,13);
			C = C + eout[1];
			
			if(i<8) {
				B = B + eout[0];
				D = D ^ eout[2];
			}
			else{
				D = D + eout[0];
				B = B ^ eout[2];
			}
			
			aux = A;
			A = B;
			B = C;
			C = D;
			D = aux;
		}
		//backward mixing
		for(int i = 0;i<=7;i++){
			
			if(i == 3 || i == 7) A = A - B;
			if(i == 2 || i == 6) A = A - D;
			
			B = B ^ s_box[(A & 0xff) + 256];
			C = C - s_box[rotr(A,24) & 0xff];
			D = D - s_box[(rotr(A,16) & 0xff) + 256];
			D = D ^ s_box[rotr(A,8) & 0xff];
			
			A = rotl(A,24);
			
			aux = A;
			A = B;
			B = C;
			C = D;
			D = aux;

		}
		A = A - K[36];
		B = B - K[37];
		C = C - K[38];
		D = D - K[39];
		
		data[0] = A;data[1] = B;data[2] = C;data[3] = D;
		
		for(int i = 0;i<tmp.length;i++){
			tmp[i] = (byte)((data[i/4] >>> (i%4)*8) & 0xff);
		}
		
		return tmp;	
	}
	
	private static int[] E_func(int in,int k1,int k2){
		int[] tmp = new int[3];
		int M,L,R;
		M = in + k1;
		R = rotl(in,13) * k2;
		L = s_box[M & 0x000001ff];
		R = rotl(R,5);
		M = rotl(M,R & 0x0000001f);
		L = L ^ R;
		R = rotl(R,5);
		L = L ^ R;
		L = rotl(L,R & 0x0000001f);
		
		tmp[0] = L;
		tmp[1] = M;
		tmp[2] = R;
		
		return tmp;
	}
	
	public static byte[] encrypt(byte[] in,byte[] key){
		K = expandKey(key);
		int lenght=0;
		byte[] padding = new byte[1];
		int i;
		lenght = 16 - in.length % 16;				
		padding = new byte[lenght];					
		padding[0] = (byte) 0x80;
		
		for (i = 1; i < lenght; i++)				
			padding[i] = 0;

		byte[] tmp = new byte[in.length + lenght];		
		byte[] bloc = new byte[16];	
		
		int count = 0;

		for (i = 0; i < in.length + lenght; i++) {
			if (i > 0 && i % 16 == 0) {
				bloc = encryptBloc(bloc);
				System.arraycopy(bloc, 0, tmp, i - 16, bloc.length);
			}
			if (i < in.length)
				bloc[i % 16] = in[i];
			else{														
				bloc[i % 16] = padding[count % 16];
				count++;
			}
		}
		if(bloc.length == 16){
			bloc = encryptBloc(bloc);
			System.arraycopy(bloc, 0, tmp, i - 16, bloc.length);
		}
		
		return tmp;
	}

这是我在（encrypt_data）按钮中写的代码，但它给出了错误:(

This is the code I wrote in (encrypt_data) button but it gives error :(

byte[] plain = plaintext.getText().getBytes();
        if (key_128.isSelected())
       {
         byte[] K = getText().getBytes();
       }

       else if (key_192.isSelected())
       {
         byte[] K = getText().getBytes();
       }
     else if (key_256.isSelected()){
        byte[] K = getText().getBytes();
     }
       byte[] encrypted = encrypt(plain, K);
       String encrypted = encrypt.setText();

我需要在按键（key_128）（key_192）（key_256）中设置值。我怎么能在java中做到这一点？每个键都有二进制值



我尝试过：



i尝试在encrypt_data按钮中设置值，但没有工作

And I need to set values in key buttons (key_128) (key_192) (key_256). How I can do that in java? Each key will have binary value

What I have tried:

i tried seting values in encrypt_data button but didn't work

推荐答案

猜测，你得到一个编译器错误，因为你声明了 K 里面 如果 / 否则如果阻止，但是你正试图在那些街区外面使用它。



将声明移到第一个上方，如果声明。你还需要处理三个选项都没有被选中的情况 - 你知道它永远不会发生，但编译器没有，并会抱怨它。

At a guess, you're getting a compiler error because you've declared K inside the if / else if blocks, but you're trying to use it outside of those blocks.

Move the declaration above the first if statement. You'll also need to handle the case where none of the three options is selected - you know it will never happen, but the compiler doesn't, and will complain about it.

byte[] plain = plaintext.getText().getBytes();
byte[] K;
if (key_128.isSelected())
{
    K = getText().getBytes();
}
else if (key_192.isSelected())
{
    K = getText().getBytes();
}
else if (key_256.isSelected())
{
    K = getText().getBytes();
}
else
{
    throw new IllegalStateException();
}

现在你只需要解决为什么你有 if 语句，给出每个分支完全一样！

Now you just need to work out why you have the if statements at all, given that every branch does exactly the same thing!

这是我提出的解决方案，但第二行有错误。我正在努力解决，如果有人可以提供帮助我发布了问题。谢谢！

this is the solution i came up with but there is error in the second line. i'm trying to solve and i posted question if anyone could help. thank you!

byte[] plain = plaintext.getText().getBytes();
byte[] K = new BinaryCodec().toByteArray("0011000100110011100000001010");
byte[] encrypted = encrypt(plain, K);
String a = new String(encrypted);
encryptedtext.setText(a);

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