杭电密码学DES密码实验报告.doc

文档介绍：杭电密码学DES密码实验报告
课 程 密码学实验 学 院 通信工程学院 专 业 信息安全 班 级 14083611 学 号 14084125 学生姓名 刘博 实验名称 DES密码实验 授课教师 胡丽琴
DES密码实验
一、实验接将R, L作为IP的输16161616入。
详见下图:
输入
初始置换IP
L R 00
f K 1
L=R R=L?f(R,K) 101001
f K i
L=R R=L?f(R,K) 151415141415
Kf 16
R=L?f(R,KL=R 161515161615
)
-1逆初始置换IP
输出
3、使用Visual C++编写程序，实现DES密码及输出界面， 主要步骤:
1) 新建一个空项目，取名des。
2) 在左边的解决方案资源管理器中添加cpp文件，。 3)
#include<iostream>
using namespace std;
static bool SubKey[16][48]; //定义子密钥，使得所有函数都能调用
static const unsigned char IP_Table[64] = { //定义IP置换表
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}; static const unsigned char IPInv_Table[64] = { //定义IP逆置换表
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};
static const unsigned char E_Table[48] = { //定义E扩展表
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}; static const unsigned char P_Table[32] = { //定义P置换表
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}; static const unsigned char PC1_Table[56] = { //定义PC1置换表
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}; static const unsigned char PC2_Table[48] = { //定义PC2置换表
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};
static const unsigned char LS_Table[16] = { //定义左移位数表
1,1,2,2,2,2,2,2,1,2,2,2,2,2,2,1}; static unsigned char S_Box[8][4][16] = { //S盒
//S1
14,4,13,1,2,15,11,8,3,10,6,12,5,9,0,7,
0,15,7,4,14,2,