hex.h

各种加密算法的集合

#ifndef CRYPTOPP_HEX_H 
#define CRYPTOPP_HEX_H 
 
#include "cryptlib.h" 
#include "filters.h" 
 
NAMESPACE_BEGIN(CryptoPP) 
 
class HexEncoder : public Filter 
{ 
public: 
	HexEncoder(BufferedTransformation *outQueue = NULL) 
		: Filter(outQueue) {} 
 
	void Put(byte inByte) 
	{ 
		outQueue->Put(vec[inByte >> 4]); 
		outQueue->Put(vec[inByte & 0x0F]); 
	} 
 
	void Put(const byte *inString, unsigned int length); 
 
private: 
	static const byte vec[17]; 
}; 
 
class HexDecoder : public Filter 
{ 
public: 
	HexDecoder(BufferedTransformation *outQueue = NULL) 
		: Filter(outQueue) {last = -1;} 
 
	void Put(byte inByte) 
	{ 
		int i=ConvToNumber(inByte); 
		if (i >= 0) 
		{ 
			if (last >= 0) 
			{ 
				outQueue->Put((last << 4) | i); 
				last = -1; 
			} 
			else 
				last = i; 
		} 
	} 
 
	void Put(const byte *inString, unsigned int length); 
 
private: 
	static int ConvToNumber(byte inByte) 
	{ 
		if (inByte >= '0' && inByte <= '9') 
			return inByte - '0'; 
		if (inByte >= 'A' && inByte <= 'F') 
			return inByte - 'A' + 10; 
		if (inByte >= 'a' && inByte <= 'f') 
			return inByte - 'a' + 10; 
		return -1; 
	} 
 
	int last; 
}; 
 
NAMESPACE_END 
 
#endif