1 #include<iostream>
  2 using namespace std;
  3  
  4         
  5  
  6 int jiami(){
  7     
  8     // 明文 
  9     int mingwen[64];
 10            
 11            
 12     cout<<"请输入16位十六进制的明文:";
 13     string  kk;
 14     cin>>kk;
 15     int len=kk.length();
 16  
 17     
 18     while(len!=16){
 19         cout<<"请重新输入16位十六进制的明文:";
 20         cin>>kk; 
 21         len=kk.length();
 22     }
 23     
 24     int jishu=0;
 25     for(int i=0;i<16;i++){
 26         int a;
 27         if(kk[i]>='0'&&kk[i]<='9')
 28            a=kk[i]-'0';
 29         else
 30            a=kk[i]-'A'+10;
 31            
 32         int n[4]={0};
 33         int f=0;
 34         while(a){
 35             n[f]=a%2;
 36             a=a/2;
 37             f++;
 38         }
 39         mingwen[jishu*4]=n[3];
 40         mingwen[jishu*4+1]=n[2];
 41         mingwen[jishu*4+2]=n[1];
 42         mingwen[jishu*4+3]=n[0];
 43         jishu++; 
 44     } 
 45  
 46    
 47  
 48     //初始置换IP 
 49     int IP[64]={58, 50, 42, 34, 26, 18, 10, 2,
 50                 60, 52, 44, 36, 28, 20, 12, 4,
 51                 62, 54, 46, 38, 30, 22, 14, 6,
 52                 64, 56, 48, 40, 32, 24, 16, 8,
 53                 57, 49, 41, 33, 25, 17,  9, 1,
 54                 59, 51, 43, 35, 27, 19, 11, 3,
 55                 61, 53, 45, 37, 29, 21, 13, 5,
 56                 63, 55, 47, 39, 31, 23, 15, 7};
 57                 
 58                 
 59                 
 60             
 61                 
 62     // 选择运算E   32位明文扩充为48位                
 63     int E[48]={ 32,  1,  2,  3,  4,  5,
 64                 4,  5,  6,  7,  8,  9,
 65                 8,  9, 10, 11, 12, 13,
 66                12, 13, 14, 15, 16, 17,
 67                16, 17, 18, 19, 20, 21,
 68                20, 21, 22, 23, 24, 25,
 69                24, 25, 26, 27, 28, 29,
 70                28, 29, 30, 31, 32,  1 }; 
 71                       
 72               
 73     //64位秘钥     0123456789ABCDEF    56位的秘钥+8位校验码 
 74     int miyao[64];
 75     cout<<"请输入16位十六进制的秘钥:";
 76     string  k_2;
 77     cin>>k_2;
 78     int len_2=k_2.length();
 79  
 80     
 81     while(len_2!=16){
 82         cout<<"请重新输入16位十六进制的秘钥:";
 83         cin>>k_2; 
 84         len_2=k_2.length();
 85     }
 86     
 87     int jishu_2=0;
 88     for(int i=0;i<16;i++){
 89         int a;
 90         if(k_2[i]>='0'&&k_2[i]<='9')
 91            a=k_2[i]-'0';
 92         else
 93            a=k_2[i]-'A'+10;
 94            
 95         int n[4]={0};
 96         int f=0;
 97         while(a){
 98             n[f]=a%2;
 99             a=a/2;
100             f++;
101         }
102         miyao[jishu_2*4]=n[3];
103         miyao[jishu_2*4+1]=n[2];
104         miyao[jishu_2*4+2]=n[1];
105         miyao[jishu_2*4+3]=n[0];
106         jishu_2++; 
107     }      
108            
109            
110     //置换选择1
111     int IP_1[56]={57, 49, 41, 33, 25, 17,  9,
112                    1, 58, 50, 42, 34, 26, 18,
113                   10,  2, 59, 51, 43, 35, 27,
114                   19, 11,  3, 60, 52, 44, 36,
115                   63, 55, 47, 39, 31, 23, 15,
116                    7, 62, 54, 46, 38, 30, 22,
117                   14,  6, 61, 53, 45, 37, 29,
118                   21, 13,  5, 28, 20, 12,  4};
119      
120                 
121  
122     //16次左移对应的位数                 
123     int weiyi[16]={1,1,2,2,2,2,2,2,1,2,2,2,2,2,2,1};     
124     // 置换选择2 秘钥56->48位压缩 
125     int IP_2[48]={14, 17, 11, 24,  1,  5,
126                    3, 28, 15,  6, 21, 10,
127                   23, 19, 12,  4, 26,  8,
128                   16,  7, 27, 20, 13,  2,
129                   41, 52, 31, 37, 47, 55,
130                   30, 40, 51, 45, 33, 48,
131                   44, 49, 39, 56, 34, 53,
132                   46, 42, 50, 36, 29, 32};
133                                 
134      //S盒
135                 
136     int s[8][65]=
137 {
138     {
139         14,4,13,1,2,15,11,8,3,10,6,12,5,9,0,7,
140         0,15,7,4,14,2,13,1,10,6,12,11,9,5,3,8,
141         4,1,14,8,13,6,2,11,15,12,9,7,3,10,5,0,
142         15,12,8,2,4,9,1,7,5,11,3,14,10,0,6,13
143     },
144     {
145         15,1,8,14,6,11,3,4,9,7,2,13,12,0,5,10,
146         3,13,4,7,15,2,8,14,12,0,1,10,6,9,11,5,
147         0,14,7,11,10,4,13,1,5,8,12,6,9,3,2,15,
148         13,8,10,1,3,15,4,2,11,6,7,12,10,5,14,9
149     },
150     {
151         10,0,9,14,6,3,15,5,1,13,12,7,11,4,2,8,
152         13,7,0,9,3,4,6,10,2,8,5,14,12,11,15,1,
153         13,6,4,9,8,15,3,0,11,1,2,12,5,10,14,7,
154         1,10,13,0,6,9,8,7,4,15,14,3,11,5,2,12
155     },
156     {
157         7,13,14,3,0,6,9,10,1,2,8,5,11,12,4,15,
158         13,8,11,5,6,15,0,3,4,7,2,12,1,10,14,9,
159         10,6,9,0,12,11,7,13,15,1,3,14,5,2,8,4,
160         3,15,0,6,10,1,13,8,9,4,5,11,12,7,2,14
161     },
162     {
163         2,12,4,1,7,10,11,6,8,5,3,15,13,0,14,9,
164         14,11,2,12,4,7,13,1,5,0,15,10,3,9,8,6,
165         4,2,1,11,10,13,7,8,15,9,12,5,6,3,0,14,
166         11,8,12,7,1,14,2,13,6,15,0,9,10,4,5,3
167     },
168     {
169         12,1,10,15,9,2,6,8,0,13,3,4,14,7,5,11,
170         10,15,4,2,7,12,9,5,6,1,13,14,0,11,3,8,
171         9,14,15,5,2,8,12,3,7,0,4,10,1,13,11,6,
172         4,3,2,12,9,5,15,10,11,14,1,7,6,0,8,13
173     },
174     {
175         4,11,2,14,15,0,8,13,3,12,9,7,5,10,6,1,
176         13,0,11,7,4,9,1,10,14,3,5,12,2,15,8,6,
177         1,4,11,13,12,3,7,14,10,15,6,8,0,5,9,2,
178         6,11,13,8,1,4,10,7,9,5,0,15,14,2,3,12
179     },
180     {
181         13,2,8,4,6,15,11,1,10,9,3,14,5,0,12,7,
182         1,15,13,8,10,3,7,4,12,5,6,11,0,14,9,2,
183         7,11,4,1,9,12,14,2,0,6,10,13,15,3,5,8,
184         2,1,14,7,4,10,8,13,15,12,9,0,3,5,6,11
185     }
186 };
187  
188                 
189      //P置换      
190      int P[32]={16,  7, 20, 21, 29,  
                       
                    
                    
 
                      




鲜花




握手




雷人




路过




鸡蛋