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1、void *memcpy( void *dest, const void *src, unsigned char count ) /ASSERT(dest != NULL)&(src != NULL); unsigned char *temp_dest = (unsigned char *)dest; unsigned char *temp_src = (unsigned char *)src; while(count-) / 不对是否存在重叠区域进行判断 *temp_dest+ = *temp_src+; return dest; unsigned char *memset(unsigned
2、 char *dst,unsigned char value,unsigned char count)unsigned char *start = dst;while (count-)*dst+ = value;return(start);/ 初始置换表IPunsigned char IP_Table64 = 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, 56,48,40,32,24,16,8,0, 58,50,42,34,26,18,10,2, 60
3、,52,44,36,28,20,12,4, 62,54,46,38,30,22,14,6;/逆初始置换表IP-1unsigned char IP_1_Table64 = 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, 32,0,40,8,48,16,56,24;/扩充置换表Eunsigned char E_Tab
4、le48 = 31, 0, 1, 2, 3, 4, 3, 4, 5, 6, 7, 8, 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;/置换函数Punsigned char P_Table32 = 15,6,19,20,28,11,27,16, 0,14,22,25,4,17,30,9, 1,7,23,13,31,26,2,8, 18,12,29,5,21,10,3,24;/S盒 unsigned char S8416
5、=/ 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,/ S215,1,8,14,6,11,3,4,9,7,2,13,12,0,5,10,3,13,4,7,15,2,8,14,12,0,1,10,6,9,11,5,0,14,7,11,10,4,13,1,5,8,12,6,9,3,2,15,13,8,10,1,3,15,4,2,11,6,
6、7,12,0,5,14,9,/S310,0,9,14,6,3,15,5,1,13,12,7,11,4,2,8,13,7,0,9,3,4,6,10,2,8,5,14,12,11,15,1,13,6,4,9,8,15,3,0,11,1,2,12,5,10,14,7,1,10,13,0,6,9,8,7,4,15,14,3,11,5,2,12,/ S47,13,14,3,0,6,9,10,1,2,8,5,11,12,4,15,13,8,11,5,6,15,0,3,4,7,2,12,1,10,14,9,10,6,9,0,12,11,7,13,15,1,3,14,5,2,8,4,3,15,0,6,10,1
7、,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,/S612,1,10,15,9,2,6,8,0,13,3,4,14,7,5,11,10,15,4,2,7,12,9,5,6,1,13,14,0,11,3,8,9,14,15,5,2,8,12,3,7,0,4,10,1,13,11,6,4,
8、3,2,12,9,5,15,10,11,14,1,7,6,0,8,13,/ S74,11,2,14,15,0,8,13,3,12,9,7,5,10,6,1,13,0,11,7,4,9,1,10,14,3,5,12,2,15,8,6,1,4,11,13,12,3,7,14,10,15,6,8,0,5,9,2,6,11,13,8,1,4,10,7,9,5,0,15,14,2,3,12,/S813,2,8,4,6,15,11,1,10,9,3,14,5,0,12,7,1,15,13,8,10,3,7,4,12,5,6,11,0,14,9,2,7,11,4,1,9,12,14,2,0,6,10,13,
9、15,3,5,8,2,1,14,7,4,10,8,13,15,12,9,0,3,5,6,11;/置换选择1unsigned char PC_156 = 56,48,40,32,24,16,8, 0,57,49,41,33,25,17, 9,1,58,50,42,34,26, 18,10,2,59,51,43,35, 62,54,46,38,30,22,14, 6,61,53,45,37,29,21, 13,5,60,52,44,36,28, 20,12,4,27,19,11,3;/置换选择2unsigned char PC_248 = 13,16,10,23,0,4,2,27, 14,5,20
10、,9,22,18,11,3, 25,7,15,6,26,19,12,1, 40,51,30,36,46,54,29,39, 50,44,32,46,43,48,38,55, 33,52,45,41,49,35,28,31;/ 对左移次数的规定unsigned char MOVE_TIMES16 = 1,1,2,2,2,2,2,2,1,2,2,2,2,2,2,1;/字节转换成二进制unsigned char ByteToBit(unsigned char ch, unsigned char bit8) unsigned char cnt; for(cnt = 0;cnt cnt)&1; retu
11、rn 0;/ 二进制转换成字节 unsigned char BitToByte(unsigned char bit8,unsigned char *ch) unsigned char cnt; for(cnt = 0;cnt 8; cnt+) *ch |= *(bit + cnt)cnt; return 0;/ 将长度为8的字符串转为二进制位串 unsigned char Char8ToBit64(unsigned char ch8,unsigned char bit64) unsigned char cnt; for(cnt = 0; cnt 8; cnt+) ByteToBit(*(ch+cnt),bit+(cnt3); return 0;/ 将二进制位串转为长度为8的字符串unsigned char Bit64ToChar8(unsigned char bit64,unsigned char ch8) unsigned char cnt; memset(ch,0,8); for(cnt = 0; cnt 8; cnt+) BitToByte(bit+(cnt3),ch+cnt); return 0;/ 密钥置换1 unsigned char DES_PC1_Tran
