文档介绍：Forpersonaluseonlyinstudyandresearch;mercialuse/******************************************author:TroyLiu*time:*说明:由于本人C语言编程能力有限,此代码仅供参考.*其中各个功能地实现具有一定地参考价值.*代码地部分书写****惯亦可参考.*如果有能力者,可以考虑分函数完成.*请记住:所有地代码都写到main()函数是一个很不良地编程****惯!!!******************************************//*********************************************这仅是DES地第一轮加密*puter#*输入密文:program#*书本地错误:*,应该为1(这个错误不影响往后地结果)*,应该为1101,而不是0011*********************************************//********DES密码地加密过程*******************(明文&密文)分成两组完成**** 32->48 完成**,通过8个s盒完成**********************************************/#include<>intip[]={ //IP置换 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 };intjiou[]={ 7,15,23,31,39,47,55,63 //进行密钥添加奇偶校验位使用};intki[]={ //密钥置换 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 };intkyasuo[]={ //对密钥进行压缩置换 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 };intmkuozhan[]={ 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 };ints[8][4][16]={ //8个s盒{ {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}, {0,14,4,11,10,4,13,1,5,8,12,6,9,3,2,15}, {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,