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[/] [csa/] [trunk/] [sw_sim/] [key_perm.c] - Blame information for rev 24

Line No.	Rev	Author	Line
1	10	simon111	`/*`
2			`* =====================================================================================`
3			`*`
4			`* Filename: key_perm.c`
5			`*`
6			`* Description: this file tests the key_perm function`
7			`*`
8			`* Version: 1.0`
9			`* Created: 07/05/2008 07:51:58 AM`
10			`* Revision: none`
11			`* Compiler: gcc`
12			`*`
13			`* Author: mengxipeng$gmai.com`
14			`* Company: mengxipeng`
15			`*`
16			`* =====================================================================================`
17			`*/`
18
19			`#include <stdio.h>`
20			`#include <memory.h>`
21
22			`extern unsigned char key_perm[0x40]; /* defined in csa.c */`
23
24			`unsigned char i_key[8];`
25			`unsigned char o_key[8];`
26
27			`int main()`
28			`{`
29	13	simon111	`int i;`
30			`int j;`
31			`int k;`
32	10	simon111	`unsigned char p;`
33	13	simon111	`int v;`
34			`int c;`
35			`int b;`
36			`/* first read the input key */`
37	10	simon111	`memset(i_key,0,sizeof i_key);`
38			`for (i=63;i>=0;i--)`
39			`{`
40			`c=getchar();`
41			`printf("%c",c);`
42			`if(c=='1')`
43			`{`
44			`i_key[i/8]\|=(1<<(i%8));`
45			`}`
46			`}`
47			`printf("\n");`
48
49			`/* now do the key_perm operatioin */`
50			`memset(o_key,0,sizeof o_key);`
51			`/* 64 bit perm on kb */`
52			`for (j = 0; j < 8; j++)`
53			`{`
54			`for (k = 0; k < 8; k++)`
55			`{`
56			`b=key_perm[j*8+k]-1;`
57			`if((i_key[j] >> (7 - k)) & 1)`
58			`{`
59			`o_key[b/8] \|= (1<<(7-(b%8)));`
60			`}`
61			`}`
62			`}`
63
64			`/* output the o_key */`
65			`for (i=63;i>=0;i--)`
66			`{`
67			`if(o_key[i/8]&(1<<(i%8)))`
68			`printf("1");`
69			`else`
70			`printf("0");`
71			`}`
72			`printf("\n");`
73
74			`return 0;`
75			`}`