DES源代码C语言实现简洁易懂.docx

《DES源代码C语言实现简洁易懂.docx》由会员上传分享，免费在线阅读，更多相关内容在行业资料-天天文库。

1、ttincludeO/*初始置换表IP*/intIP_Table[64]={57,49,41,33,25,17,9,1,59,51,43,35,27,19,11,3,61,53,45,37,29,21,13,5,63,55,47,39,31,23,15,7,56,4&40,32,24,16,&0,58,50,42,34,26,18,10,2,60,52,44,36,28,20,12,4,62,54,46,38,30,22,14,6};/*逆初始置换表IP*/intIP_l_Table[64]二{39,7,47,15,

2、55,23,63,31,38,6,46,14,54,22,62,30,0,14,22,25,6,17,30,9,37,5,45,13,53,21,61,29,36,4,44,12,52,20,60,28,0,14,22,25,6,17,30,9,34,2,42,10,50,18,5&26,/*扩充置换表EintE_Table[48]/*置换函数P*/intP_Table[32]33,1,41,9,49,17,57,25,32,0,40,8,48,16,56,24};{31,0,1,2,3,4,3,4,5,6,7,8,

3、7,8,9,10,11,12,11,12,13,14,15,16,15,16,17,18,19,20,19,20,21,22,23,24,23,24,25,26,27,28,27,28,29,30,31,0};0,14,22,25,6,17,30,9,{15,6,19,20,28,11,27,16,0,14,22,25,6,17,30,9,1,7,23,13,31,26,2,8,1&12,29,5,21,10,3,24};/*S盒*/intS[8][4][16]=/*SI*/{{{14,4,13,1,2,15,11,

4、&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,&13,6,2,11,15,12,9,7,3,10,5,0},{15,12,&2,4,9,1,7,5,11,3,14,10,0,6,13}},/*S2*/{{15,1,&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,&12,6,9,3,2,1

5、5},{13,8,10,1,3,15,4,2,11,6,7,12,0,5,14,9}},/*S3*/{{10,0,9,14,6,3,15,#,1,13,12,7,11,4,2,8},{13,7,0,9,3,4,8,10,2,&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}},/*S4*/{{7,13,14,3,0,6,9,10,1,2,&5,11,12,4,15},{13,

6、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}},/*S5*/{{2,12,4,1,7,10,11,6,&5,3,15,13,0,14,9},{14,11,2,12,4,7,13,1,5,0,15,10,3,9,{{12,1,10,15,9,2,6,&0,13,3,4,14,7,5,11},{13,7,0,9,3,4,8,10,2,&5

7、,14,12,11,15,1},8,6},{4,2,1,11,10,13,7,&15,9,12,5,6,3,0,14},{11,8,12,7,1,14,2,13,6,15,0,9,10,4,5,3}},/*S6*/{{12,1,10,15,9,2,6,&0,13,3,4,14,7,5,11},{10,15,4,2,10,12,9,5,6,1,13,14,0,11,3,8},{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}},/*S7*/{{4,11,2,14,15,0,&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}}