Mainf.cpp
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上传用户:hzzhongsui
上传日期:2022-08-05
资源大小:4k
文件大小:10k
源码类别:
加密解密
开发平台:
Visual C++
- #include <stdio.h>
- #include "stdafx.h"
- #include <string.h>
- unsigned __int64 MAP[65] , key[17]={0} ;
- int IP[8][8]={
- {58,50,42,34,26,18,10,2},
- {60,52,44,36,28,20,12,4},
- {62,54,46,38,30,22,14,6},
- {64,56,48,40,32,24,16,8},
- {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}
- };
- int PC1[8][7]={
- {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}
- };
- int TR[16]={1,1,2,2,2,2,2,2,1,2,2,2,2,2,2,1};
- int PC2[8][6]={
- {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}
- };
- int E[8][6]={
- {32,1,2,3,4,5},
- {4,5,6,7,8,9},
- {8,9,10,11,12,13},
- {12,13,14,15,16,17},
- {16,17,18,19,20,21},
- {20,21,22,23,24,25},
- {24,25,26,27,28,29},
- {28,29,30,31,32,1}
- };
- int S[8][4][16]={
- {
- {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},
- },
- {
- {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},
- },
- {
- {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},
- },
- {
- {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},
- },
- {
- {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},
- },
- {
- {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},
- },
- {
- {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},
- },
- {
- {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}
- }
- };
- int P[8][4]={
- {16,7,20,21},
- {29,12,28,17},
- {1,15,23,26},
- {5,18,31,10},
- {2,8,24,14},
- {32,27,3,9},
- {19,13,30,6},
- {22,11,4,25}
- };
- int IP_1[8][8]={
- {40,8,48,16,56,24,64,32},
- {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}
- };
- void getkey( unsigned __int64 *);
- void ip( unsigned __int64 * );
- void pc1(unsigned __int64 * ,unsigned int * ,unsigned int*);
- unsigned __int64 tran(unsigned int i ,unsigned int *c , unsigned int * );
- void pc2( unsigned __int64 *);
- void et( unsigned int * ,unsigned __int64 * );
- void so( unsigned __int64 *);
- void p(unsigned __int64 * );
- void ip1(unsigned __int64 * );
- void func( unsigned int ,unsigned int *);
- int main()
- {
- //对MAP 数组初始化
- unsigned int i, c,d ,L , R ,temp;
- unsigned __int64 k=1;
- for( i=64 ; i>=1 ;i--)
- {
- MAP[i]=k;
- k*=2;
- }
- MAP[0]=0;
- unsigned __int64 message , key , rmg , rmessage , mg;
- char str[12]={0};
- FILE *fp , *fp1;
- puts("请输入要加密的密钥:n");
- scanf("%I64d" , &key );
- puts("请输入待加密的明文文件 (默认为:test.txt):n");
- scanf("%s" , str );
- getkey( &key ); //计算16个子密钥
- if(!(fp=fopen(str ,"r")))
- printf("can not open the file n");
- if(!(fp1=fopen( "result.txt" ,"w+")))
- printf("can not open the file n");
- while(!feof(fp))
- {
- int k=0 , m=0;
- mg=0;
- while(!feof(fp)&&k<8)
- {
- m=fgetc(fp);
- if(m!=-1)
- {
- mg=mg<<8;
- mg=mg|m;
- k++;
- }
- else
- break;
- }
- message=mg;
- //加密部分
- //printf("原来的数据为:%I64d n" ,message );
- //printf("%I64d %I64d " ,message , key );
- ip( &message ); //变换初始待加密文
- //pc1( &key , &c, &d ); //密钥置换64位->56位
- L=R=0;
- R=0x00000000ffffffff&message;
- L=0x00000000ffffffff&(message>>32);
- //printf("%I64d %d %d " , message , L, R );
- for( i =1 ; i<=16 ; i++)
- {
- //printf("第 %d 次加密n" , i );
- temp=R;
- func( i , &R );
- //fun( i , &R , &c , &d ); //经过fun()函数后,R已经改变了,为F(R,K)
- R=R^L;
- L=temp;
- //printf("L是 %d , R是%d n" , L, R );
- }
- rmg=0;
- rmg=rmg|R; //最后一次是按R,L的顺序合成,而不是L,R
- rmg=rmg<<32;
- rmg=rmg|L;
- ip1( &rmg );//末置换加密数据
- //printf("加密后的数据为:%I64dn" , rmg );
- for( i=0 ; i<8 ; i++)
- {
- char ch=0x00000000000000ff&(rmg>>56);
- rmg=rmg<<8;
- fprintf( fp1 , "%c" , ch );
- }
- //printf(" %I64d" , rmg );
- }
- fclose(fp);
- fclose(fp1);
- puts("加密结束.....请查看密文result.txtn");
- if(!(fp=fopen("result.txt" ,"r")))
- printf("can not open the file n");
- if(!(fp1=fopen("Dresult.txt" ,"w+")))
- printf("can not open the file n");
- while(!feof(fp))
- {
- int k=0 , m=0 ,tag=0 ;
- mg=0;
- while(!feof(fp)&&k<8)
- {
- m=fgetc(fp);
- if(m!=-1)
- {
- mg=mg<<8;
- mg=mg|m;
- k++;
- }
- else
- {tag=1; break;}
- }
- if(tag)
- break;
- rmg=mg;
- //解密部分
- ip( &rmg);
- L=R=0;
- temp=0;
- R=0x00000000ffffffff&rmg;
- L=0x00000000ffffffff&(rmg>>32);
- for( i=16 ; i>=1 ; i-- )
- {
- //printf("第 %d 次解密 n" , i );
- temp=R;
- func( i , &R );
- R=L^R;
- L=temp;
- //printf("L是 %d , R是%d n" , L, R );
- }
- rmessage=0;
- rmessage=rmessage|R;
- rmessage=rmessage<<32;
- rmessage=rmessage|L;
- ip1(&rmessage);
- //printf("解密后的数据为 :%I64d n " , rmessage );
- for( i=0 ; i<8 ; i++)
- {
- char ch=0x00000000000000ff&rmessage>>56;
- rmessage=rmessage<<8;
- if(ch!=0)
- fprintf( fp1 , "%c" , ch );
- }
- //printf(" %I64d n" ,rmessage );
- }
- fclose(fp);
- fclose(fp1);
- puts("解密结束......请查看解密所得文件Dresult.txtn");
- return 0;
- }
- void ip( unsigned __int64 *mg )
- {
- unsigned __int64 t1=0;
- for( int i=0 ; i<8 ; i++)
- for( int j=0 ; j<8; j++)
- {
- if(MAP[IP[i][j]]&*mg) //映射到第IP[i][j],判断此位是否为1 ,分别操作
- t1=t1|MAP[i*8+j+1] ;
- }
- *mg=t1;
- }
- void pc1(unsigned __int64 *k , unsigned int*c , unsigned int *d ) //将64位密钥压缩为56位,并分成c,d各28位
- {
- unsigned int i , j;
- *c=*d=0;
- //得到左边28位
- for( i=0 ; i<4 ; i++)
- for( j=0 ; j<7 ; j++)
- { //从左往右为第一位到第28位
- *c=*c<<1;
- if(MAP[PC1[i][j]]&*k)
- *c=*c|1;
- }
- //得到右边28位
- for( i=4 ; i<8 ; i++)
- for( j=0 ; j<7 ; j++ )
- {
- *d=*d<<1;
- if(MAP[PC1[i][j]]&*k)
- //*d=*d|MAP[(i-4)*7+j+1-32];
- *d=*d|1;
- }
- }
- unsigned __int64 tran( unsigned int i , unsigned int *c , unsigned int *d ) //返回56位数据
- {
- unsigned __int64 k=0;
- unsigned int j , m=0 ;
- j=TR[i-1]; //TR从0开始
- *c=*c&0x0fffffff;
- *d=*d&0x0fffffff;
- while(m<j)
- { //循环左移
- if(*c&0x08000000) //134217728为2的27次幂
- {
- *c=*c<<1;
- *c=*c&0x0fffffff; //第29位清零
- *c=*c|1;
- }
- else
- *c=*c<<1;
- if(*d&0x08000000)
- {
- *d=*d<<1;
- *d=*d&0x0fffffff;
- *d=*d|1;
- }
- else
- *d=*d<<1;
- m++;
- }
- //将*c ,*d合并
- k=k|*c;
- k=k<<28;
- k=k|*d;
- return k;
- }
- void pc2(unsigned __int64 *k) //将56位压缩位48位
- {
- unsigned __int64 ky=0;
- int i , j;
- for( i=0 ; i<8 ; i++)
- for( j=0 ; j<6 ; j++)
- { ky=ky<<1;
- if(MAP[PC2[i][j]+8]&*k) //这里注意了 ,现在是将56位压缩为48为,存贮这56位是从17位开始到64位 ,所以+16
- ky=ky|1;
- }
- *k=ky;
- }
- void et(unsigned int *r,unsigned __int64 *rr)//将32位扩展为48位
- {
- int i , j ;
- *rr=0;
- for( i =0 ; i< 8 ; i++)
- for( j=0 ; j<6 ; j++)
- {
- *rr=*rr<<1;
- if(MAP[E[i][j]+32]&*r)
- *rr=*rr|1;
- }
- }
- void so( unsigned __int64 * k ) //将48位数据通过s盒压缩为32位
- {
- __int64 mg;
- mg=*k;
- *k=0;
- int i , m , n;
- m=n=0;
- mg=mg<<16;
- for( i=0 ; i<8 ; i++ )
- {
- if(mg&MAP[1])
- if(mg&MAP[6])
- m=3;
- else
- m=2;
- else
- if(mg&MAP[6])
- m=1;
- else
- m=0;
- n=0x000000000000000f&(mg>>59);
- //n=n&0x0000000f; //最高位置0
- *k=*k<<4;
- *k=*k|S[i][m][n];
- mg=mg<<6;//处理下面6位
- m=n=0;//每次用过之后清零, 否则m , n出错
- }
- *k=*k&0x00000000ffffffff;
- }
- void p(unsigned __int64 * mg) //将32转换为32位
- {
- unsigned int i , j ;
- unsigned __int64 k=0;
- for( i=0 ; i<8 ; i++)
- for( j=0 ; j<4 ; j++)
- {
- k=k<<1;
- if(MAP[P[i][j]+32]&*mg)
- k=k|1;
- }
- *mg=k;
- }
- void ip1( unsigned __int64 *rmg) //IP1盒转换
- {
- unsigned __int64 t , t1=0;
- t=*rmg;
- unsigned int i , j ;
- for( i=0 ; i<8 ; i++ )
- for( j=0 ; j<8 ; j++ )
- {
- if(MAP[IP_1[i][j]]&t)
- t1=t1|MAP[i*8+j+1] ;
- //else
- //t1=t1&~MAP[i*8+j+1];
- }
- *rmg=t1;
- }
- void func( unsigned int i , unsigned int *L )
- {
- unsigned __int64 k=0 , LR=0; // RL为扩充后的48位数据
- k=key[i];
- //printf(" 密钥是 %I64d n" , k );
- et(L , &LR);
- k=LR^k;
- so(&k);//s盒置换
- p(&k);//p盒置换
- *L=0x00000000ffffffff&k;
- }
- void getkey( unsigned __int64 * k )
- {
- int i ;
- unsigned int c=0 , d=0;
- unsigned __int64 x=0;
- pc1( k , &c , &d );
- for(i=1 ; i<=16 ; i++ )
- {
- x=tran( i , &c , &d ); //c ,d 实际使用28位
- pc2( &x ); //得到密钥48位
- key[i]=x; //存储16个密钥,供解密时直接使用
- }
- }
- /*
- *__int64 aa;
- *printf("%d %d %d %d " ,sizeof(aa) , sizeof(unsigned int) ,sizeof(short), sizeof(long) ); //8 4 2 4
- *printf("n%d %d %d " , sizeof(double) ,sizeof(float) ,sizeof(long double));//8 4 8
- */
- /* 测试将64位分成二个32位
- *__int64 kk=0x0000000100000001;
- *int kkk=0 , hh=0;
- *kkk=kkk|kk;
- *hh=hh|kk>>32;
- *printf("%d %d " , kkk , hh);
- */