des.h

各种加密算法的集合

#ifndef CRYPTOPP_DES_H 
#define CRYPTOPP_DES_H 
 
#include "cryptlib.h" 
#include "misc.h" 
 
NAMESPACE_BEGIN(CryptoPP) 
 
class DES : public BlockTransformation 
{ 
public: 
	DES(const byte *userKey, CipherDir); 
 
	void ProcessBlock(const byte *inBlock, byte * outBlock) const; 
	void ProcessBlock(byte * inoutBlock) const 
		{DES::ProcessBlock(inoutBlock, inoutBlock);} 
 
	enum {KEYLENGTH=8, BLOCKSIZE=8}; 
	unsigned int BlockSize() const {return BLOCKSIZE;} 
 
protected: 
	static const word32 Spbox[8][64]; 
 
	SecBlock<word32> k; 
}; 
 
class DESEncryption : public DES 
{ 
public: 
	DESEncryption(const byte * userKey) 
		: DES (userKey, ENCRYPTION) {} 
}; 
 
class DESDecryption : public DES 
{ 
public: 
	DESDecryption(const byte * userKey) 
		: DES (userKey, DECRYPTION) {} 
}; 
 
class DES_EDE_Encryption : public BlockTransformation 
{ 
public: 
	DES_EDE_Encryption(const byte * userKey) 
		: e(userKey, ENCRYPTION), d(userKey + DES::KEYLENGTH, DECRYPTION) {} 
 
	void ProcessBlock(const byte *inBlock, byte * outBlock) const; 
	void ProcessBlock(byte * inoutBlock) const; 
 
	enum {KEYLENGTH=16, BLOCKSIZE=8}; 
	unsigned int BlockSize() const {return BLOCKSIZE;} 
 
private: 
	DES e, d; 
}; 
 
class DES_EDE_Decryption : public BlockTransformation 
{ 
public: 
	DES_EDE_Decryption(const byte * userKey) 
		: d(userKey, DECRYPTION), e(userKey + DES::KEYLENGTH, ENCRYPTION) {} 
 
	void ProcessBlock(const byte *inBlock, byte * outBlock) const; 
	void ProcessBlock(byte * inoutBlock) const; 
 
	enum {KEYLENGTH=16, BLOCKSIZE=8}; 
	unsigned int BlockSize() const {return BLOCKSIZE;} 
 
private: 
	DES d, e; 
}; 
 
class TripleDES_Encryption : public BlockTransformation 
{ 
public: 
	TripleDES_Encryption(const byte * userKey) 
		: e1(userKey, ENCRYPTION), d(userKey + DES::KEYLENGTH, DECRYPTION), 
		  e2(userKey + 2*DES::KEYLENGTH, ENCRYPTION) {} 
 
	void ProcessBlock(const byte *inBlock, byte * outBlock) const; 
	void ProcessBlock(byte * inoutBlock) const; 
 
	enum {KEYLENGTH=24, BLOCKSIZE=8}; 
	unsigned int BlockSize() const {return BLOCKSIZE;} 
 
private: 
	DES e1, d, e2; 
}; 
 
class TripleDES_Decryption : public BlockTransformation 
{ 
public: 
	TripleDES_Decryption(const byte * userKey) 
		: d1(userKey + 2*DES::KEYLENGTH, DECRYPTION), e(userKey + DES::KEYLENGTH, ENCRYPTION), 
		  d2(userKey, DECRYPTION) {} 
 
	void ProcessBlock(const byte *inBlock, byte * outBlock) const; 
	void ProcessBlock(byte * inoutBlock) const; 
 
	enum {KEYLENGTH=24, BLOCKSIZE=8}; 
	unsigned int BlockSize() const {return BLOCKSIZE;} 
 
private: 
	DES d1, e, d2; 
}; 
 
NAMESPACE_END 
 
#endif