rc5.h

rc5 c语言源代码。可修改性强。适合学习调试使用~

typedef unsigned long int u32;		/*Shoule be 32 bit = 4 bytes*/
typedef unsigned char u16;

/*Rotation operators. x must be unsigned, to get logical right shift*/
#define ROTL(x,y)  ( ((x)<<(y&(w-1))) | ((x)>>(w-(y&(w-1)))) )
#define ROTR(x,y)  ( ((x)>>(y&(w-1))) | ((x)<<(w-(y&(w-1)))) )
void RC5_encrypt( u32 *data );		/*加密，输入明文pt[2],输出密文ct[2]*/
void RC5_decrypt( u32 *data );		/*解密，输入密文ct[2],输出明文pt[2]*/
void key_setup( unsigned char *K );			/*生成子密钥*/