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1、实验二DES加密与解密算法的实现【实验目的】1、理解DES加密与解密的程序设计算法思想。2、加深对数据加密与解密的理解3、掌握DES加密算法思想，提高信息安全的编程能力【实验内容】编写DES加密与解密程序，实现对信息的加密与解密源程序：#include"stdio.h"#include"iostream.h"#include"memory.h"staticvoidF_func(boolIn[32],constboolKi[48]);//F函数staticvoidS_func(boolOut[32],con
2、stboolIn[48]);//S盒代替staticvoidTransform(bool*Out,bool*In,constchar*Table,intlen);staticvoidXor(bool*InA,constbool*InB,intlen);//异或staticvoidRotateL(bool*In,intlen,intloop);//循环左移staticvoidByteToBit(bool*Out,constchar*In,intbits);staticvoidBitToByte(char*O
3、ut,constbool*In,intbits);//初始变换conststaticcharIP[64]={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};//末置换conststaticc
4、harIPR[64]={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};//扩展置换staticconstcharE[48]={32,1,2,3,4,5,4,5,6,7,8,9,8,9,10
5、,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};//作用在S盒的32位输出结果上的P变换conststaticcharP[32]={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};//密钥初始置换conststaticcharPC
6、1[56]={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};//密钥压缩变换PC-2conststaticcharPC2[48]={14,17,11,24,1,5,3,28,15,6,21,10,23,19,12,4,26,8,16,
7、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};//每圈移位次数conststaticcharLOOP[16]={1,1,2,2,2,2,2,2,1,2,2,2,2,2,2,1};//S盒conststaticcharS_Box[8][4][16]={//S114,4,13,1,2,15,11,8,3,10,6,12,5,9,0,7,0,15,7,4,14,2,13,1,10,6,1
8、2,11,9,5,3,8,4,1,14,8,13,6,2,11,15,12,9,7,3,10,5,0,15,12,8,2,4,9,1,7,5,11,3,14,10,0,6,13,//S215,1,8,14,6,11,3,4,9,7,2,13,12,0,5,10,3,13,4,7,15,2,8,14,12,0,1,10,6,9,11,5,0,14,7,11,10,4,13,1,5,8,12,6,9,3,2,15,13,8,10,
