keygen.java

this progam written in java language and describe the des algorithm that allow us to encrypt and de

/*
 *   *       Please Visit us at www.codemiles.com     *
 *  This Program was Developed by www.codemiles.com forums Team
 *  *           Please Don't Remove This Comment       *
 */

public class KeyGen {
    
    /** Creates a new instance of KeyGen */
    public KeyGen() {
        
    }
    
    public void FillPC_1()   {
        int index=0;
        for(int row=0;row<8; row++){
            for(int col=0; col<7; col++){
                store_num[index]=PC_1[row][col];
                index++;
            }
        }
    }
    
    public void FillPC_2()   {
        int index=0;
        for(int row=0;row<8; row++){
            for(int col=0; col<6; col++){
                store_num1[index]=PC_2[row][col];
                index++;
            }
        }
    }
    public void DoPC_1(int [] key_in, int [] key_out) {
        int temp=0;
        int i=0;
        int loop=0;
        int check=0;
        while(check!=56){
            temp=store_num[i];
            if(temp==loop){
                key_out[check]=key_in[loop-1];
                loop=0;
                check++;
                i++;
            }
            loop++;
        }
        
        System.out.println("The Permutted key");
        for(int j=0; j<key_out.length; j++){
            System.out.print(key_out[j]);
        }
        
        int index=0;
        for(int g=0; g<7; g++){
            for(int j=0; j<8; j++){
                keyS[g][j]=Integer.toString(key_out[index]);
                index++;
            }
        }
        
        arrayprinter.printarray(keyS,"After PC-1");
    }
    
    
    public void DoPC_2(int [] key_in, int [] key_out) {
        int temp=0;
        int i=0;
        int loop=0;
        int check=0;
        while(check!=48){
            temp=store_num1[i];
            if(temp==loop){
                key_out[check]=key_in[loop-1];
                loop=0;
                check++;
                i++;
            }
            loop++;
        }
        
                int index=0;
        for(int g=0; g<6; g++){
            for(int j=0; j<8; j++){
               finalS[g][j]=Integer.toString(key_out[index]);
                index++;
            }
        }
        
        arrayprinter.printarray(finalS,"After PC-2");
        index=0;
    }
    
    public void DoSegementation(int [] key_out,int [] C, int[] D){
        int index=0;
        for(int i=0; i<28; i++)
            C[i]=key_out[i];
        
        for(int i=28; i<56; i++){
            D[index]=key_out[i];
            
            index++;
        }
        
        
        index=0;
        for(int g=0; g<4; g++){
            for(int j=0; j<7; j++){
                cS[g][j]=Integer.toString(key_out[index]);
                index++;
            }
            
        }
        
        for(int g=0; g<4; g++){
            for(int j=0; j<7; j++){
                dS[g][j]=Integer.toString(key_out[index]);
                index++;
            }
            
            
            
        }
        index=0;
        
        arrayprinter.printarray(cS,"Segment Key to C part");
        arrayprinter.printarray(dS,"Segment Key to D part");
    }
    public void Do_OneLeftShitf(int[] side1, int []side2){
        
        int temp=side1[0];
        for(int i=1; i<side1.length; i++){
            
            side1[i-1]=side1[i];
            
            
        }
        side1[side1.length-1]=temp;
        temp=side2[0];
        for(int i=1; i<side2.length; i++){
            
            side2[i-1]=side2[i];
            
            
        }
        side2[side2.length-1]=temp;
        
        System.out.println("After One left shift");
        for(int j=0; j<side1.length; j++){
            System.out.print(side1[j]);
        }
    }
    
    
    
    
    
    
    private int[] store_num= new int[56];
    private int[] store_num1= new int[48];
    private int[][] PC_1={{57 ,49 ,41 ,33 ,25 ,17 ,9},
    {1, 58, 50, 42, 34, 26, 18},
    {10, 2,59, 51, 43, 35, 27},
    {19, 11, 3, 60, 52, 44, 36},
    {63, 55, 47, 39, 31, 23, 15},
    {7, 62, 54, 46, 38, 30, 22},
    {14, 6, 61, 53, 45, 37, 29},
    {21, 13, 5 ,28, 20, 12, 4}
    };
    private int[][] PC_2={{14, 17, 11, 24, 1, 5},
    {3, 28, 15, 6, 21, 10},
    {23, 19, 12, 4,26, 8},
    {16, 7, 27, 20, 13, 2},
    {41, 52, 31, 37, 47, 55},
    {30, 40, 51, 45, 33, 48},
    {44, 49, 39, 56, 34, 53},
    {46, 42, 50, 36, 29, 32}
    };
    private String key;
    private String keyS[][]= new String[7][8];
    private String cS[][] = new String [4][7];
    private String dS[][] = new String [4][7];
    private String finalS[][] = new String [6][8];
    
}
/*
 *   *       Please Visit us at www.codemiles.com     *
 *  This Program was Developed by www.codemiles.com forums Team
 *  *           Please Don't Remove This Comment       *
 */