求支持多线程的des算法

2012-11-26 11:59:47 258 阅读 AI 写同款 · GEO 优化AI 选题数据监测一键分发 ›

基于Qt的DES加解密工具实现：从算法原理到GUI应用对称加密是信息安全领域的基石技术，其核心原理在于使用相同密钥进行数据的加密与解密，确保信息传输的机密性。DES（Data Encryption Standard）作为经典的对称加密算法，通过Feistel网络结构和S盒替换等机制，实现了对64位数据分组的有效混淆与扩散。在工程实践中，理解DES的工作模式（如ECB、CBC）与数据填充方案（如PKCS#7）对于处理实际数据流至关重要。本文将结合**Qt框架**的GUI开发能力，探讨如何构建一个**可视化DES加解密演示工具**，该工具不仅可用于教学演示，还能为阅读详情

求支持多线程的des算法，现在用的算法不支持多线程。



//------------------------------------ .h 头文件------------------------------

#pragma once



#include "stdafx.h"







/*	Flags controlling SingleDesOperation()  */

#define DO_INITIAL_DES_PERMUTATION		0x10

#define DES_ENCRYPTION_MODE				0x20

#define DES_DECRYPTION_MODE				0

#define DO_FINAL_DES_PERMUTATION		0x40



#define DES_ENCRYPT_BLOCK (DO_INITIAL_DES_PERMUTATION|DES_ENCRYPTION_MODE|DO_FINAL_DES_PERMUTATION )

#define DES_DECRYPT_BLOCK (DO_INITIAL_DES_PERMUTATION|DES_DECRYPTION_MODE|DO_FINAL_DES_PERMUTATION )



/*	Flags controlling CombinedDesOperation()  */

#define ZERO_CBC_IV   		0x10000000L

#define CBC_ENCRYPTION		0x20000000L

#define CBC_DECRYPTION		0



#define SINGLE_DES_ENCRYPTION (CBC_ENCRYPTION|DES_ENCRYPT_BLOCK|0x1)

#define SINGLE_DES_DECRYPTION (CBC_DECRYPTION|DES_DECRYPT_BLOCK|0x1)



#define TRIPLE_DES_ENCRYPTION_E1D2E1 (CBC_ENCRYPTION|DO_INITIAL_DES_PERMUTATION | DES_ENCRYPTION_MODE|0x1L | ((DES_DECRYPTION_MODE|0x2L)<<8) | ((DES_ENCRYPTION_MODE|DO_FINAL_DES_PERMUTATION|0x1L)<<16))

#define TRIPLE_DES_DECRYPTION_D1E2D1 (CBC_DECRYPTION|DO_INITIAL_DES_PERMUTATION | DES_DECRYPTION_MODE|0x1L | ((DES_ENCRYPTION_MODE|0x2L)<<8) | ((DES_DECRYPTION_MODE|DO_FINAL_DES_PERMUTATION|0x1L)<<16))

#define TRIPLE_DES_ENCRYPTION_E1D2E3 (CBC_ENCRYPTION|DO_INITIAL_DES_PERMUTATION | DES_ENCRYPTION_MODE|0x1L | ((DES_DECRYPTION_MODE|0x2L)<<8) | ((DES_ENCRYPTION_MODE|DO_FINAL_DES_PERMUTATION|0x3L)<<16))

#define TRIPLE_DES_DECRYPTION_D3E2D1 (CBC_DECRYPTION|DO_INITIAL_DES_PERMUTATION | DES_DECRYPTION_MODE|0x3L | ((DES_ENCRYPTION_MODE|0x2L)<<8) | ((DES_DECRYPTION_MODE|DO_FINAL_DES_PERMUTATION|0x1L)<<16))



class DES

{



public:

	// _____________________________________________________________________________

	//

	//  FUNCTION: SingleDesOperation

	//        IN: *plaintext: 8 bytes data to be encrypt/decrypt

	//                     plaintext[0] .. MSByte

	//                     plaintext[7] .. LSByte

	//            *key: 8 bytes key for encrypt/decrypt

	//                     key[0] .. MSByte

	//                     key[7] .. LSByte

	//	      	  mode: 8 bits = xFEIxxKK 	

	//					F = Do Final Des Permutation

	//					E = Des Encryption Mode (1=Encrypt)

	//					I = Do Initial Des Permutation

	//					KK = Key Number (1 to 3)

	//       OUT: *plaintext 8 bit encrypted/decrypted data 

	//                     plaintext[0] .. MSByte

	//                     plaintext[7] .. LSByte

	//    RETURN: 

	static void SingleDesOperation (unsigned char *plaintext, unsigned char *key, unsigned char mode);



	// _____________________________________________________________________________

	//

	//  FUNCTION: CombinedDesOperation

	//        IN: *pvInOutputBlock: 8 bytes data to be encrypt/decrypt

	//                     pvInOutputBlock[0] .. MSByte

	//                     pvInOutputBlock[7] .. LSByte

	//            *pvCbcBlock: 8 bytes value for CBC mode xor

	//                     pvCbcBlock[0] .. MSByte

	//                     pvCbcBlock[7] .. LSByte

	//            *pbKeyString: 8 or 16 bytes key for encrypt/decrypt

	//                     key[0] .. key1 MSByte

	//                     key[7] .. key1 LSByte

	//                     key[8] .. key2 MSByte

	//                     key[15] .. key2 LSByte

	//	      	  eDesMode: Des operating mode (3DES or Single DES)

	//						32 bits => xxCZxxxx xFEIxxKK xFEIxxKK xFEIxxKK 	

	//						F = Do Final Des Permutation

	//						E = Des Encryption Mode (1=Encrypt)

	//						I = Do Initial Des Permutation

	//						KK = Key Number (1 to 3) (0=disable)

	//						C = CBC Encryption

	//						Z = Initial Value set to zero

	//	      	  cnt: Number of 8-bytes data to be Des operated	

	//		   		   Maximum of 255 bytes

	//		   				 eg. for 8-bytes data, cnt=1 or cnt=0

	//		       				 for 16-bytes data, cnt=2

	//		       				 for 32-bytes data, cnt=4		   

	//       OUT: *pvInOutputBlock

	//    RETURN: 

	static void CombinedDesOperation (unsigned char *pvInOutputBlock, unsigned char *pvCbcBlock, 

		unsigned char *pbKeyString, unsigned int eDesMode,

		unsigned int cnt);



	// _____________________________________________________________________________

	//

	//  FUNCTION: CalcDesMac32

	//        IN: eDesMode: Des operating mode (3DES or Single DES)

	//						32 bits => xxCZxxxx xFEIxxKK xFEIxxKK xFEIxxKK 	

	//						F = Do Final Des Permutation

	//						E = Des Encryption Mode (1=Encrypt)

	//						I = Do Initial Des Permutation

	//						KK = Key Number (1 to 3) (0=disable)

	//						C = CBC Encryption

	//						Z = Initial Value set to zero

	//            *pvSubKeys: 8 or 16 bytes key for encrypt/decrypt

	//                     key[0] .. key1 MSByte

	//                     key[7] .. key1 LSByte

	//                     key[8] .. key2 MSByte

	//                     key[15] .. key2 LSByte

	//            *pvCbcBlock: 8 bytes value for CBC mode xor

	//                     pvCbcBlock[0] .. MSByte

	//                     pvCbcBlock[7] .. LSByte

	//	      	  *pbInputData: data input for calculating MAC

	//	      	  eNBytes: Number of input data bytes	

	//       OUT: *pbMac32Out: 4 bytes output calculated MAC32

	//    RETURN: 

	static void CalcDesMac32( unsigned int eDesMode, unsigned char *pvSubKeys, unsigned char *pvCbcBlock,

		unsigned char *pbInputData, unsigned int eNBytes , unsigned char *pbMac32Out);



	static char CheckDesMac32( unsigned int eDesMode, unsigned char *pvSubKeys, unsigned char *pvCbcBlock,

		unsigned char *pbInputData, unsigned int eNBytes );



	/**************************************************************************************************/

	/*PBOC MAC*/

	static void CalcPBOCMac(  unsigned char *pvSubKeys, 

		unsigned char *pvCbcBlock,

		unsigned char *pbInputData, 

		unsigned int eNBytes , 

		unsigned char *pbMac32Out);



	static void CalCrc16( unsigned char* input, 

		unsigned char* Crc16, 

		unsigned int len);   



	static char CheckCrc16( unsigned char* input, unsigned int len);



	static void RandGen4(unsigned char *abRnd);



	static void _checktable (unsigned char line,unsigned char *text,unsigned char *lasttext,unsigned char *IDD);

	static void Exor8Bytes (unsigned char *Output, unsigned char *Input1, unsigned char *input2);

};