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1、/* Note:Your choice is C IDE */#include “stdio.h“#include “string.h“#define uchar unsigned char/*明文转换声明部分*/IP1置换表int IP_164=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,
2、 3,61, 53, 45, 37, 29, 21, 13, 5,63, 55, 47, 39, 31, 23, 15, 7;/IP2逆置换表int IP_264=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,
3、41, 9, 49, 17, 57, 25;/E扩展置换表int E_case48=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;/S盒压缩int S1416=14, 4, 13, 1, 2, 15, 11, 8, 3, 10, 6, 12, 5, 9, 0, 7,0, 15, 7, 4, 14, 2,
4、 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;int S2416=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,
5、3, 2, 15,13, 8, 10, 1, 3, 15, 4, 2, 11, 6, 7, 12, 0, 5, 14, 9;int S3416=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;int S4416= 7, 13
6、, 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;int S5416= 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
7、, 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;int S6416=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
8、, 3, 2, 12, 9, 5, 15, 10, 11, 14, 1, 7, 6, 0, 8, 13;int S7416= 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;int S8416=13, 2, 8, 4, 6,
9、 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;/P盒置换int Permute32= 16, 7, 20, 21, 29, 12, 28, 17,1, 15, 23, 26, 5, 18, 31, 10,2, 8, 24, 14, 32, 27, 3,
10、 9,19, 13, 30, 6, 22, 11, 4, 25;/*字节与二进制相互变换部分*/字节转换成二进制int ByteToBit(char ch,char bit8)uchar x;for(x=0;x7;return 0;/字符串转换成二进制位串int Char8ToBit64(char ch8,char bit64)uchar x;for(x=0;x3;S32bit4*x+1=(char)(out)S32bit4*x+2=(char)(out)S32bit4*x+3=(char)(out)return 0; /*明文16次迭代,加密，*输入值：mw64子密钥：miyue1648*返
11、回值：data64*/int Encryp(char data64,char Zkey161648)uchar x,y;char Left32,Right32,EKbuff48;char SE32bit32;IP1_permute(data);/IP置换memcpy(Left,data,32);/分离32bitmemcpy(Right,data+32,32); for(x=0;x0;x-) /16轮迭代R_Expand48bit(D_Right,D_EKbuff);/E盒扩展for(y=0;y48;y+) /与密钥异或D_EKbuffy=D_Zkey16x-1y;Reduceto32bit(D
12、_EKbuff,D_SE32bit);/经S盒压缩32bit,返回值D_SE32bit。Pcase(D_SE32bit); /经P盒置换，返回值SE32bitfor(y=0;y32;y+) D_SE32bity=D_Lefty;memcpy(D_Left,D_Right,32);memcpy(D_Right,D_SE32bit,32);memcpy(miwen,D_Right,32); /合成64bitmemcpy(miwen+32,D_Left,32);IP2_permute(miwen); /IP逆置换return 0; /*主函数部分*/int main(void)uchar x;char MingW64bit64,MingW8Byte8; char Key64bit64,Key8Byte8;char Key161648,temp264;char Mybuff8;printf(“请输入密钥：n“);scanf(“%s“,Key8Byte);Char8ToBit64(Key8Byte,Key64bit); /密钥字符串置换成二进制串 for(x=0;x8;x+) /补偿足8位奇偶校验位memcpy(temp2+8*x,Key64bit+7*x,7);temp2x*8+7=1;memcpy(Key64bit,temp2,64);Key16Itera(Key64bit,Key16
