3个著名加密算法(MD5、RSA、DES)的解析(10)

34,2,42,10,50,18,58 26,33,1,41, 9,49,17,57,25,

放大换位表

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,

单纯换位表

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,

在f(Ri,Ki)算法描述图中，S1,S2…S8为选择函数，其功能是把6bit数据变为4bit数据。下面给出选择函数Si(i=1,2……的功能表：

选择函数Si

S1:

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,

S2:

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,

0,14,7,11,10,4,13,1,5,8,12,6,9,3,2,15,

13,8,10,1,3,15,4,2,11,6,7,12,0,5,14,9,

S3:

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,

S4:

7,13,14,3,0,6,9,10,1,2,8,5,11,12,4,15,

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,

S5:

2,12,4,1,7,10,11,6,8,5,3,15,13,0,14,9,

14,11,2,12,4,7,13,1,5,0,15,10,3,9,8,6,

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,

S6:

12,1,10,15,9,2,6,8,0,13,3,4,14,7,5,11,