VC基于DES小型数据安全传输系统附源码

1、成绩：2010 年信息安全引论课程报告题目：基于 DES 小型数据安全传输系统学号 200700401010姓名 李瑞典班级 计 071日期 10-11-24目录第一章 概述3第二章 系统需求分析3第三章 系统设计3第四章 调试与运行结果4第五章 总结和体会6第一章 概述随着网络应用的普遍，人们利用网络传输信息和数据已成为主要的途径。但随着网络技术的发展，网络信息传输的安全性就成为了我们关注的事情。现在网络扫描和网络监听的手段越来越高明和多样化，所以，对网络传输的信息进行加密成为了信息安全传输的首选方法。DES 工作的基本原理： 其入口参数有三个 :key、data、mode。key 为加密解

2、密使用的密钥， data 为加密解密的数据， mode 为其工作模式。当模式为加密模式时，明文按照 64 位进行分组，形成明文组， key 用于对数据加密，当模式为解密模式时， key 用于对数据解密。实际运用中，密钥只用到了 64 位中的 56 位，这样才具有高的安全性。在通信网络的两端，双方约定一致的 Key，在通信的源点用 Key 对核心数据进行 DES 加密，然后以密码形式在公共通信网中传输到通信网络的终点， 数据到达目的后，用同样的 Key 对密码数据进行解密，便再现了明码形式的核心数据。本系统是基于 DES 加密算法对传输的数据进行加密后再通过网络传输，具有一定的安全性。即使黑客们

3、通过网络监听获取到密文数据，但在有限的时间内还是很难对密文进行破解的。第二章 系统需求分析（1）功能需求：系统能安全地发送即时信息和文件；所有信息的传输都经过加密后再发送到接收方；接收方能够对接收到的不同类型的信息进行处理； 当接收到的是文件内容时，保存到本地文件中。（2）设计需求：能够选择发送的是信息还是文件；具有良好的界面和可操作性。第三章 系统设计发送端：开始密钥处理信息发送文件传输网络传输密钥加密密文接收方退出接收端：开始密钥处理网络传输密文发送端解密即时信息数据文件显示信息保存文件退出第四章 调试与运行结果（1）发送端和接收端界面：（2）发送和接收信息调试：（3）发送文件和接收文件调

4、试：（4）查看接收到的文件：第五章 总结和体会通过本次的课程学习和系统的编写，撑握了 DES 算法的加密技术。认识到了网络通信信息安全性的重要性。现代的密码学，除了用于保密通信之外，更多运用于政治，外交，军事，经济间来。随着信息科技的不断发展，密码学已经越来越成为社会的主角。DES 在 1977 年被美国国家标准技术协会认可成为均衡加密算法的标准,用于加密非机密的信息.des 广泛应用于各个行业的加密领域,如银行业.是一种古老的加密算法，但至今还有人在用。可见，DES 算法的加密技术还是具有一定的安全性。普遍用于一些非重要信息的加密传输中。无论是哪种加密算法，都会有其的局限性和被破解性，所以，

5、在对通信信息进行加密来提高安全性外，还应加强信息伦理学的工作。提高网民的素质和遵守网络使用法规，才能更好的信息的安全性，构建和谐的网络环境！/客户端#pragma comment(lib,ws2_32.lib) #include #include #include #include #include #include #include DES_fw.h/DES 加密和解密头文件#include windows.h using namespace std;int send_file(SOCKET sock,char *name)/文件发送函数FILE *fd =fopen(name,rb );

6、if (fd=NULL)printf(文件打开失败n); return -1;int name_len = strlen(name); if(name_len0)for(int i=0;iread_count;i+=8)Des_Run(buffer+i, buffer+i, ENCRYPT);/每 8 个字节加密send(sock,buffer,read_count,0);shutdown(sock,SD_SEND); printf(文件发送完成n); return 0;int main()system(color F0);void send_msg(SOCKET sock,char *dat

7、a);/函数声明int putout();int ch;char key8=1,9,8,0,9,1,7,2;Des_SetKey(key);WSADATA wsa_data;WSAStartup(0x0202,&wsa_data); SOCKET s_sock;s_sock = socket(AF_INET,SOCK_STREAM,0);sockaddr_in to_addr;/套接字地址簇to_addr.sin_family = AF_INET;to_addr.sin_port = htons(1024);to_addr.sin_addr.S_un.S_addr = inet_addr(12

8、7.0.0.1);/设为本机地址char file_name256 = 0; char data1024; memset(data,0,1024);if (connect(s_sock,(sockaddr *)&to_addr,sizeof(sockaddr) 0)/链接服务器（接收方）printf(链接接受文件电脑失败n); return 0;do/菜单选择循环ch=putout();send(s_sock,(char *)&ch,sizeof(int),0); switch(ch)case 1:send_msg(s_sock,data); break;case 2:printf(请输入要发

9、送的文件名，并确保该文件存在于当前目录下n); scanf(%s,file_name);send_file(s_sock,file_name); return 0;break; case 3:break;while(ch!=3); return 0;void send_msg(SOCKET sock,char *data)/即时信息发送函数int len_data;printf(请输入要发送的信息，退出请输入 q：n); while(1)memset(data,0,1024); gets(data); len_data=strlen(data); if(len_data8)len_data=8

10、; if(data0=q)Des_Run(data, data, ENCRYPT); send(sock,data,len_data,0); system(cls);break;Des_Run(data, data, ENCRYPT);int sByte=send(sock,data,len_data,0); if(SOCKET_ERROR=sByte)closesocket(sock); WSACleanup(); break;int putout()/界面菜单显示函数int chose;printf(n|- 基于 DES 的小型数据安全传输系统 -|nn); printf(|1.基本信息传

11、输|n);printf(|2.文件传输|n);printf(|3.退出|n); while(1)printf(请选择：);scanf(%d,&chose); getchar();if(chose=1|chose=2|chose=3) return chose;elseprintf(非法输入!);/客户端头文件#include memory.h #include stdio.henum ENCRYPT,DECRYPT;/ ENCRYPT:加密,DECRYPT:解密void Des_Run(char Out8, char In8, bool Type=ENCRYPT);/ 设置密钥void Des

12、_SetKey(const char Key8);static void F_func(bool In32, const bool Ki48);/ f 函数static void S_func(bool Out32, const bool In48);/ S 盒代替/ 变换static void Transform(bool *Out, bool *In, const char *Table, int len); static void Xor(bool *InA, const bool *InB, int len);/ 异或static void RotateL(bool *In, int

13、len, int loop);/ 循环左移/ 字节组转换成位组static void ByteToBit(bool *Out, const char *In, int bits);/ 位组转换成字节组static void BitToByte(char *Out, const bool *In, int bits);/置换 IP 表const static char IP_Table64 = 58,50,42,34,26,18,10,2,60,52,44,36,28,20,12,4,62,54,46,38,30,22,14,6,64,56,48,40,32,24,16,8,57,49,41,3

14、3,25,17,9,1,59,51,43,35,27,19,11,3,61,53,45,37,29,21,13,5,63,55,47,39,31,23,15,7;/逆置换 IP-1 表const static char IPR_Table64 = 40,8,48,16,56,24,64,32,39,7,47,15,55,23,63,31,38,6,46,14,54,22,62,30,37,5,45,13,53,21,61,29,36,4,44,12,52,20,60,28,35,3,43,11,51,19,59,27,34,2,42,10,50,18,58,26,33,1,41,9,49,17

15、,57,25;/E 位选择表static const char E_Table48 = 32,1,2,3,4,5,4,5,6,7,8,9,8,9,10,11,12,13,12,13,14,15,16,17,16,17,18,19,20,21,20,21,22,23,24,25,24,25,26,27,28,29,28,29,30,31,32,1;/P 换位表const static char P_Table32 = 16,7,20,21,29,12,28,17,1,15,23,26,5,18,31,10,2,8,24,14,32,27,3,9,19,13,30,6,22,11,4,25;/PC

16、1 选位表const static char PC1_Table56 = 57,49,41,33,25,17,9,1,58,50,42,34,26,18,10,2,59,51,43,35,27,19,11,3,60,52,44,36,63,55,47,39,31,23,15,7,62,54,46,38,30,22,14,6,61,53,45,37,29,21,13,5,28,20,12,4;/PC2 选位表const static char PC2_Table48 = 14,17,11,24,1,5,3,28,15,6,21,10,23,19,12,4,26,8,16,7,27,20,13,2

17、,41,52,31,37,47,55,30,40,51,45,33,48,44,49,39,56,34,53,46,42,50,36,29,32;/左移位数表const static char LOOP_Table16 = 1,1,2,2,2,2,2,2,1,2,2,2,2,2,2,1;/ S 盒const static char S_Box8416 = / S1 14,4,13,1,2,15,11,8,3,10,6,12,5,9,0,7,0,15,7,4,14,2,13,1,10,6,12,11,9,5,3,8,4,1,14,8,13,6,2,11,15,12,9,7,3,10,5,0,15

18、,12,8,2,4,9,1,7,5,11,3,14,10,0,6,13,/S2 15,1,8,14,6,11,3,4,9,7,2,13,12,0,5,10,3,13,4,7,15,2,8,14,12,0,1,10,6,9,11,5,0,14,7,11,10,4,13,1,5,8,12,6,9,3,2,15,13,8,10,1,3,15,4,2,11,6,7,12,0,5,14,9,/S3 10,0,9,14,6,3,15,5,1,13,12,7,11,4,2,8,13,7,0,9,3,4,6,10,2,8,5,14,12,11,15,1,13,6,4,9,8,15,3,0,11,1,2,12,

19、5,10,14,7,1,10,13,0,6,9,8,7,4,15,14,3,11,5,2,12,/S4 7,13,14,3,0,6,9,10,1,2,8,5,11,12,4,15,13,8,11,5,6,15,0,3,4,7,2,12,1,10,14,9,10,6,9,0,12,11,7,13,15,1,3,14,5,2,8,4,3,15,0,6,10,1,13,8,9,4,5,11,12,7,2,14,/S5 2,12,4,1,7,10,11,6,8,5,3,15,13,0,14,9,14,11,2,12,4,7,13,1,5,0,15,10,3,9,8,6,4,2,1,11,10,13,7

20、,8,15,9,12,5,6,3,0,14,11,8,12,7,1,14,2,13,6,15,0,9,10,4,5,3,/S6 12,1,10,15,9,2,6,8,0,13,3,4,14,7,5,11,10,15,4,2,7,12,9,5,6,1,13,14,0,11,3,8,9,14,15,5,2,8,12,3,7,0,4,10,1,13,11,6,4,3,2,12,9,5,15,10,11,14,1,7,6,0,8,13,/S7 4,11,2,14,15,0,8,13,3,12,9,7,5,10,6,1,13,0,11,7,4,9,1,10,14,3,5,12,2,15,8,6,1,4,

21、11,13,12,3,7,14,10,15,6,8,0,5,9,2,6,11,13,8,1,4,10,7,9,5,0,15,14,2,3,12,/S8 13,2,8,4,6,15,11,1,10,9,3,14,5,0,12,7,1,15,13,8,10,3,7,4,12,5,6,11,0,14,9,2,7,11,4,1,9,12,14,2,0,6,10,13,15,3,5,8,2,1,14,7,4,10,8,13,15,12,9,0,3,5,6,11;static bool SubKey1648;/ 16 圈子密钥void Des_Run(char Out8, char In8, bool T

22、ype)static bool M64, Tmp32, *Li = &M0, *Ri = &M32; ByteToBit(M, In, 64);Transform(M, M, IP_Table, 64); if( Type = ENCRYPT )for(int i=0; i=0; i-) memcpy(Tmp, Li, 32); F_func(Li, SubKeyi); Xor(Li, Ri, 32);memcpy(Ri, Tmp, 32);Transform(M, M, IPR_Table, 64); BitToByte(Out, M, 64);void Des_SetKey(const c

23、har Key8)static bool K64, *KL = &K0, *KR = &K28; ByteToBit(K, Key, 64);Transform(K, K, PC1_Table, 56); for(int i=0; i16; i+) RotateL(KL, 28, LOOP_Tablei);RotateL(KR, 28, LOOP_Tablei); Transform(SubKeyi, K, PC2_Table, 48);void F_func(bool In32, const bool Ki48)static bool MR48; Transform(MR, In, E_Ta

24、ble, 48); Xor(MR, Ki, 48);S_func(In, MR);Transform(In, In, P_Table, 32);void S_func(bool Out32, const bool In48)for(char i=0,j,k; i8; i+,In+=6,Out+=4) j = (In01) + In5;k = (In13) + (In22) + (In31) + In4;ByteToBit(Out, &S_Boxijk, 4);void Transform(bool *Out, bool *In, const char *Table, int len)stati

25、c bool Tmp256; for(int i=0; ilen; i+)Tmpi = In Tablei-1 ; memcpy(Out, Tmp, len);void Xor(bool *InA, const bool *InB, int len)for(int i=0; ilen; i+) InAi = InBi;void RotateL(bool *In, int len, int loop)static bool Tmp256; memcpy(Tmp, In, loop); memcpy(In, In+loop, len-loop); memcpy(In+len-loop, Tmp,

26、loop);void ByteToBit(bool *Out, const char *In, int bits)for(int i=0; i(i%8) & 1;void BitToByte(char *Out, const bool *In, int bits)memset(Out, 0, (bits+7)/8); for(int i=0; ibits; i+)Outi/8 |= Ini(i%8);/服务器#pragma comment(lib,ws2_32.lib) #include #include #include #include #include #include DES_pw.h

27、/DES 加密和解密头文件#include string.h #include windows.hint recv_file(SOCKET sock)/接收文件函数char buffer1024 = 0;char pBuffer1024=解密后; int name_len,j=0;if (recv(sock,(char *)&name_len,sizeof(int),0) 0)printf(远程服务器断开); return -1;if (recv(sock,buffer,name_len,0)0)fwrite(buffer,1,recv_count,fp); for(int i=0;irecv

28、_count;i+=8)Des_Run(buffer+i, buffer+i, DECRYPT);/每 8 个字节解密fwrite(buffer,1,recv_count,fw);/保存文件fclose(fp); fclose(fw);printf(文件接收完成，成功保存至当前目录下n);return 0;void main()system(color F0);char key8=1,9,8,0,9,1,7,2;/设置密钥Des_SetKey(key);void recv_msg(SOCKET);int ch;WSADATA wsa_data;/初始化套接字WSAStartup(0x0202,

29、&wsa_data);SOCKET s_sock;s_sock = socket(AF_INET,SOCK_STREAM,0);sockaddr_in se_addr; se_addr.sin_family = AF_INET; se_addr.sin_port = htons(1024);se_addr.sin_addr.S_un.S_addr = INADDR_ANY;bind(s_sock,(sockaddr*)&se_addr,sizeof(sockaddr);/服务器邦定if (listen(s_sock,10)0)int err = GetLastError();sockaddr_

30、in from_addr;int addr_len = sizeof(from_addr); printf(等侍接收信息：n);SOCKET temp_sock = accept(s_sock,(sockaddr *)&from_addr,&addr_len);/等侍链接char chuf10;domemset(chuf,0,10); recv(temp_sock,chuf,10,0); ch=*(int *)chuf;switch(ch)case 1:printf(接收信息：n); recv_msg(temp_sock); break;case 2:printf(接收文件：n); recv_

31、file(temp_sock); break;case 3:printf(对方关闭了连接！);while(ch!=3);void recv_msg(SOCKET sock)/接收信息函数char rbuf1024; char gbuf1024;memset(rbuf,0,1024); while(1)memset(rbuf,0,1024); memset(gbuf,0,1024);int rByte=recv(sock,rbuf,1024,0); if(SOCKET_ERROR=rByte)closesocket(sock); break;strcpy(gbuf,rbuf);Des_Run(r

32、buf, rbuf, DECRYPT); if(rbuf0=q)break;elseprintf(收到的信息是：%s ,gbuf); printf(解密后：%sn,rbuf);/服务器头文件#include memory.h #include stdio.henum ENCRYPT,DECRYPT;/ ENCRYPT:加密,DECRYPT:解密void Des_Run(char Out8, char In8, bool Type=ENCRYPT);/ 设置密钥void Des_SetKey(const char Key8);static void F_func(bool In32, const

33、 bool Ki48);/ f 函数static void S_func(bool Out32, const bool In48);/ S 盒代替/ 变换static void Transform(bool *Out, bool *In, const char *Table, int len); static void Xor(bool *InA, const bool *InB, int len);/ 异或static void RotateL(bool *In, int len, int loop);/ 循环左移/ 字节组转换成位组static void ByteToBit(bool *O

34、ut, const char *In, int bits);/ 位组转换成字节组static void BitToByte(char *Out, const bool *In, int bits);/置换 IP 表const static char IP_Table64 = 58,50,42,34,26,18,10,2,60,52,44,36,28,20,12,4,62,54,46,38,30,22,14,6,64,56,48,40,32,24,16,8,57,49,41,33,25,17,9,1,59,51,43,35,27,19,11,3,61,53,45,37,29,21,13,5,63

35、,55,47,39,31,23,15,7;/逆置换 IP-1 表const static char IPR_Table64 = 40,8,48,16,56,24,64,32,39,7,47,15,55,23,63,31,38,6,46,14,54,22,62,30,37,5,45,13,53,21,61,29,36,4,44,12,52,20,60,28,35,3,43,11,51,19,59,27,34,2,42,10,50,18,58,26,33,1,41,9,49,17,57,25;/E 位选择表static const char E_Table48 = 32,1,2,3,4,5,4,5

36、,6,7,8,9,8,9,10,11,12,13,12,13,14,15,16,17,16,17,18,19,20,21,20,21,22,23,24,25,24,25,26,27,28,29,28,29,30,31,32,1;/P 换位表const static char P_Table32 = 16,7,20,21,29,12,28,17,1,15,23,26,5,18,31,10,2,8,24,14,32,27,3,9,19,13,30,6,22,11,4,25;/PC1 选位表const static char PC1_Table56 = 57,49,41,33,25,17,9,1,5

37、8,50,42,34,26,18,10,2,59,51,43,35,27,19,11,3,60,52,44,36,63,55,47,39,31,23,15,7,62,54,46,38,30,22,14,6,61,53,45,37,29,21,13,5,28,20,12,4;/PC2 选位表const static char PC2_Table48 = 14,17,11,24,1,5,3,28,15,6,21,10,23,19,12,4,26,8,16,7,27,20,13,2,41,52,31,37,47,55,30,40,51,45,33,48,44,49,39,56,34,53,46,42

38、,50,36,29,32;/左移位数表const static char LOOP_Table16 = 1,1,2,2,2,2,2,2,1,2,2,2,2,2,2,1;/ S 盒const static char S_Box8416 = / S1 14,4,13,1,2,15,11,8,3,10,6,12,5,9,0,7,0,15,7,4,14,2,13,1,10,6,12,11,9,5,3,8,4,1,14,8,13,6,2,11,15,12,9,7,3,10,5,0,15,12,8,2,4,9,1,7,5,11,3,14,10,0,6,13,/S2 15,1,8,14,6,11,3,4,9

39、,7,2,13,12,0,5,10,3,13,4,7,15,2,8,14,12,0,1,10,6,9,11,5,0,14,7,11,10,4,13,1,5,8,12,6,9,3,2,15,13,8,10,1,3,15,4,2,11,6,7,12,0,5,14,9,/S3 10,0,9,14,6,3,15,5,1,13,12,7,11,4,2,8,13,7,0,9,3,4,6,10,2,8,5,14,12,11,15,1,13,6,4,9,8,15,3,0,11,1,2,12,5,10,14,7,1,10,13,0,6,9,8,7,4,15,14,3,11,5,2,12,/S4 7,13,14,

40、3,0,6,9,10,1,2,8,5,11,12,4,15,13,8,11,5,6,15,0,3,4,7,2,12,1,10,14,9,10,6,9,0,12,11,7,13,15,1,3,14,5,2,8,4,3,15,0,6,10,1,13,8,9,4,5,11,12,7,2,14,/S5 2,12,4,1,7,10,11,6,8,5,3,15,13,0,14,9,14,11,2,12,4,7,13,1,5,0,15,10,3,9,8,6,4,2,1,11,10,13,7,8,15,9,12,5,6,3,0,14,11,8,12,7,1,14,2,13,6,15,0,9,10,4,5,3,

41、/S6 12,1,10,15,9,2,6,8,0,13,3,4,14,7,5,11,10,15,4,2,7,12,9,5,6,1,13,14,0,11,3,8,9,14,15,5,2,8,12,3,7,0,4,10,1,13,11,6,4,3,2,12,9,5,15,10,11,14,1,7,6,0,8,13,/S7 4,11,2,14,15,0,8,13,3,12,9,7,5,10,6,1,13,0,11,7,4,9,1,10,14,3,5,12,2,15,8,6,1,4,11,13,12,3,7,14,10,15,6,8,0,5,9,2,6,11,13,8,1,4,10,7,9,5,0,15,14,2,3,12,/S8 13,2,8,4,6,15,11,1,10,9,3,14,5,0,12,7,1,15,13,8,10,3,7,4,12,5,6,11,0,14,9,2,7,11,4,1,9,12,14,2,0,6,10,13,15,3,5,8,2,1,14,7,4,10,8,13,15,12,9,0,3,5,6,11;static bool SubKey1648;/ 16 圈子密钥void Des_Run(char Out8, char In8, bool Type)stat