public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        //初始置换表IP   
        int[] IP_Table = new int[64]{  57,49,41,33,25,17,9,1,   
                                 59,51,43,35,27,19,11,3,   
                                 61,53,45,37,29,21,13,5,   
                                 63,55,47,39,31,23,15,7,   
                                 56,48,40,32,24,16,8,0,   
                                 58,50,42,34,26,18,10,2,   
                                 60,52,44,36,28,20,12,4,   
                                 62,54,46,38,30,22,14,6}; 
        //逆初始置换表IP^-1   
        int[] PI_Table =new int[64]{39,7,47,15,55,23,63,31,   
           38,6,46,14,54,22,62,30,   
           37,5,45,13,53,21,61,29,   
           36,4,44,12,52,20,60,28,   
           35,3,43,11,51,19,59,27,   
           34,2,42,10,50,18,58,26,   
           33,1,41,9,49,17,57,25,   
           32,0,40,8,48,16,56,24}; 
        //扩充置换表E   
        int[] E_Table = new int[48]{31,0,1,2,3,4,   
                  3,4,5,6,7,8,   
                  7,8,9,10,11,12,   
                  11,12,13,14,15,16,   
                  15,16,17,18,19,20,   
                  19,20,21,22,23,24,   
                  23,24,25,26,27,28,   
                  27,28,29,30,31, 0}; 
        //置换函数P   
        int[] P_Table = new int[32]{15,6,19,20,28,11,27,16,   
                  0,14,22,25,4,17,30,9,   
                  1,7,23,13,31,26,2,8,   
                  18,12,29,5,21,10,3,24};
        //S盒
        int[, ,] S = new int[8, 4, 16]  
            {//S1
            {{14,4,13,1,2,15,11,8,3,10,6,12,5,9,0,7},   
              {0,15,7,4,14,2,13,1,10,6,12,11,9,5,3,8},   
                {4,1,14,8,13,6,2,11,15,12,9,7,3,10,5,0},   
                {15,12,8,2,4,9,1,7,5,11,3,14,10,0,6,13}},   
                //S2   
              {{15,1,8,14,6,11,3,4,9,7,2,13,12,0,5,10},   
              {3,13,4,7,15,2,8,14,12,0,1,10,6,9,11,5},   
              {0,14,7,11,10,4,13,1,5,8,12,6,9,3,2,15},   
              {13,8,10,1,3,15,4,2,11,6,7,12,0,5,14,9}},   
              //S3   
              {{10,0,9,14,6,3,15,5,1,13,12,7,11,4,2,8},   
              {13,7,0,9,3,4,6,10,2,8,5,14,12,11,15,1},   
                {13,6,4,9,8,15,3,0,11,1,2,12,5,10,14,7},   
              {1,10,13,0,6,9,8,7,4,15,14,3,11,5,2,12}},   
              //S4   
              {{7,13,14,3,0,6,9,10,1,2,8,5,11,12,4,15},   
              {13,8,11,5,6,15,0,3,4,7,2,12,1,10,14,9},   
              {10,6,9,0,12,11,7,13,15,1,3,14,5,2,8,4},   
              {3,15,0,6,10,1,13,8,9,4,5,11,12,7,2,14}},   
              //S5   
              {{2,12,4,1,7,10,11,6,8,5,3,15,13,0,14,9},   
              {14,11,2,12,4,7,13,1,5,0,15,10,3,9,8,6},   
              {4,2,1,11,10,13,7,8,15,9,12,5,6,3,0,14},   
              {11,8,12,7,1,14,2,13,6,15,0,9,10,4,5,3}},   
              //S6   
              {{12,1,10,15,9,2,6,8,0,13,3,4,14,7,5,11},   
              {10,15,4,2,7,12,9,5,6,1,13,14,0,11,3,8},   
              {9,14,15,5,2,8,12,3,7,0,4,10,1,13,11,6},   
              {4,3,2,12,9,5,15,10,11,14,1,7,6,0,8,13}},   
              //S7   
              {{4,11,2,14,15,0,8,13,3,12,9,7,5,10,6,1},   
              {13,0,11,7,4,9,1,10,14,3,5,12,2,15,8,6},   
              {1,4,11,13,12,3,7,14,10,15,6,8,0,5,9,2},   
              {6,11,13,8,1,4,10,7,9,5,0,15,14,2,3,12}},   
              //S8   
              {{13,2,8,4,6,15,11,1,10,9,3,14,5,0,12,7},   
              {1,15,13,8,10,3,7,4,12,5,6,11,0,14,9,2},   
              {7,11,4,1,9,12,14,2,0,6,10,13,15,3,5,8},   
              {2,1,14,7,4,10,8,13,15,12,9,0,3,5,6,11}}};
        //置换选择1   
        int[] PC1_Table = new int[56]{56,48,40,32,24,16,8,   
              0,57,49,41,33,25,17,   
              9,1,58,50,42,34,26,   
              18,1