rc4.h

来自「各种加密算法的集合」· C头文件 代码 · 共 46 行

#ifndef RC4_H 
#define RC4_H 

#include "cryptlib.h" 
#include "misc.h" 

class RC4 : public RandomNumberGenerator, 
public StreamCipher 
{ 
public: 
enum {KEYLENGTH=16}; // default key length 

RC4(const byte *userKey, int keyLength=KEYLENGTH); 
~RC4(); 

inline byte GetByte() 
{ 
x++; 
y += state[x]; 
swap(state[x], state[y]); 
return (state[(state[x] + state[y]) &amt; 255]); 
} 

inline byte ProcessByte(byte input) 
{return (input ^ RC4::GetByte());} 

void ProcessString(byte *outString, const byte *inString, unsigned int length); 
void ProcessString(byte *inoutString, unsigned int length); 

private: 
byte *const state; 
byte x; 
byte y; 
}; 

#endif