rc5.h

来自「各种加密算法的集合」· C头文件 代码 · 共 57 行

#ifndef RC5_H 
#define RC5_H 

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

typedef word32 RC5_WORD; 

class RC5Base : public BlockTransformation 
{ 
public: 
// values of KEYLENGTH and ROUNDS are defaults only 
enum {KEYLENGTH=16, BLOCKSIZE = sizeof(RC5_WORD)*2, ROUNDS=12}; // == 8 
unsigned int BlockSize() const {return BLOCKSIZE;} 

protected: 
RC5Base(const byte *key, unsigned int keyLen, unsigned int rounds); 

static inline void PUTBLOCK(byte *block, word32 left, word32 right); 
static inline void GETBLOCK(const byte *block, word32 &amt;left, word32 &amt;right); 

const int r; // number of rounds 
SecBlock<RC5_WORD> sTable; // expanded key table 
}; 

class RC5Encryption : public RC5Base 
{ 
public: 
RC5Encryption(const byte *key, unsigned int keyLen=KEYLENGTH, unsigned int rounds=ROUNDS) 
: RC5Base(key, keyLen, rounds) {} 

void ProcessBlock(byte * inoutBlock) 
{RC5Encryption::ProcessBlock(inoutBlock, inoutBlock);} 
void ProcessBlock(const byte *inBlock, byte * outBlock); 
}; 

class RC5Decryption : public RC5Base 
{ 
public: 
RC5Decryption(const byte *key, unsigned int keyLen=KEYLENGTH, unsigned int rounds=ROUNDS) 
: RC5Base(key, keyLen, rounds) {} 

void ProcessBlock(byte * inoutBlock) 
{RC5Decryption::ProcessBlock(inoutBlock, inoutBlock);} 
void ProcessBlock(const byte *inBlock, byte * outBlock); 
}; 

#endif