1、socket+dh+cr4 實現文件傳輸加密client.cpp/ client.cpp : Defines the entry point for the console application. /#include <stdio.h>#include <Winsock2.h>#include<stdlib.h>#include<string.h>/你用了winsock 但沒有鏈接相應的lib 文件。加上這一句：#pragma comment(lib, "ws2_32.lib ")#define FNAME 30void I

2、nitial(char *);/初始化的函數void Crypt();unsigned int S256;/ S 數組void nego(int *a) ;/初始化的函數int Run(int x,int r,int p,int t) int a,b,c;a=x;b=r;c=t;if(b=0) return c;if(b>0)&&(b%2=0)b=b/2; a=(a*a)%p; else b=b-1;c=(a*c)%p;Run(a,b,p,c);void swap(char *s1,char *s2)char temp;temp=*s1;*s1=*s2;*s2=temp;

3、void re_S(char *S)int i;for(i=0;i<256;i+)Si=i;void re_T(char *T,char *key)int i;int keylen;keylen=strlen(key);for(i=0;i<256;i+)Ti=keyi%keylen;void re_Sbox(char *S,char *T)int i;int j=0;for(i=0;i<256;i+)j=(j+Si+Ti)%256;swap(&Si,&Sj); void RC4_1(FILE *readfile,FILE *writefile,char *ke

4、y)/ 加密 char S256=0;char readbuf1;int i,j,t;char T256=0;re_S(S);re_T(T,key);re_Sbox(S,T);i=j=0;while(fread(readbuf,1,1,readfile) i = (i + 1) % 256;j = (j + Si) % 256;swap(&Si,&Sj);t = (Si + (Sj % 256) % 256;readbuf0=readbuf0ASt;fwrite(readbuf,1,1,writefile);memset(readbuf,0,1); int main(int a

5、rgc, char* argv)printf(" 客戶端：啟動n");int x=0;printf(" 說明 :由客戶端定義大素數和原根,客戶端加密文件后發給服務器端，服務器短解密得到正確的消息n");printf("n");printf(" 發送大素數和原根給服務器端n");nego(&x);char key=""FILE *file1,*file2;char filePath150;printf("n");printf(" 開始文件傳輸n");

6、printf(" 請輸入要發送的文件路徑:");scanf("%s",filePath1);printf(" 準備加密文件，請輸入共享密鑰:");scanf("%s",&key);file1= fopen(filePath1,"r");file2 = fopen("1.txt","w");RC4_1(file1,file2,key);fclose(file1);fclose(file2);printf(" 加密成功，準備發送給服務器端&q

7、uot;);WSADATA wsa;WSAStartup(MAKEWORD(2,2),&wsa);SOCKET sock=socket(AF_INET,SOCK_STREAM,0); if(sock=INVALID_SOCKET)printf("socket errorn");return 0;SOCKADDR_IN local;char server20;/printf(" 請輸入 IP 地址 :");/scanf("%s",server);memcpy(server,"127.0.0.1",sizeof

8、("127.0.0.1");char filePath50;strcpy(filePath, "1.txt");HANDLEfp=CreateFile(filePath,GENERIC_READ,0,NULL,OPEN_EXISTING ,FILE_ATTRI BUTE_NORMAL,NULL);while(fp=INV ALID_HANDLE_V ALUE) printf("文件路徑錯誤，請重新輸入：”)；scanf("%s",filePath);fp=CreateFile(filePath,GENERIC_READ,0,

9、NULL,OPEN_EXISTING ,FILE_ATTRI BUTE_NORMAL,NULL);printf("%sn",filePath);DWORD fileLen=GetFileSize(fp,&fileLen);printf(" 你選擇的文件大小為：%u 字節 n",fileLen);local.sin_addr.S_un.S_addr=inet_addr(server);local.sin_family=AF_INET;local.sin_port=htons(10000);if(connect(sock,(SOCKADDR*)&am

10、p;local,sizeof(SOCKADDR)=SOCKET_ERROR) printf("connect error:%in",WSAGetLastError();return 0;char* buffer=new charfileLen;DWORD bufferLen=0;/讀取文件到緩存中ReadFile(fp,buffer,fileLen,&bufferLen,NULL);bool isFirst=true;/第一次發送int sendLen=0;/實際發送數據的長度char sendBuffer200;/發送幀int sendedLen=0;/S前已發送

11、的文件長度int leftLen=fileLen;/ 當前剩下的文件長度while(true)if(isFirst)sendLen=send(sock,"",1,0);isFirst=false;if(sendLen<0)printf(" 第一幀發送失敗，程序結束n");return 0;Sleep(1000);continue;if(leftLen<=0)|(sendedLen>=fileLen)/剩下長度為 0 或當前已發送長度 為文件長則退出break;if(leftLen>=200)memcpy(sendBuffer,bu

12、ffer+sendedLen,200);sendLen=send(sock,sendBuffer,200,0);if(sendLen<0)printf(" 幀發送失敗，程序結束n");return 0;else memcpy(sendBuffer,buffer+sendedLen,leftLen); sendLen=send(sock,sendBuffer,leftLen,0);if(sendLen<0)printf(" 幀發送失敗，程序結束n");return 0;Sleep(1000);send(sock,"#",1,

13、0);sendedLen+=sendLen;leftLen=fileLen-sendedLen;printf(" 已經發送：%d 字節 n",sendedLen);if(sendedLen=fileLen)printf(" 文件發送成功n"); elseprintf(" 文件發送失敗n");closesocket(sock);WSACleanup();delete buffer;return 0;void nego(int *a)int t=1;int Q;int A;int XA1=0;long int XA2=1;int XB1=

14、0;long int k=1;int *k1;WORD wVersionRequested;WSADATA wsaData;int err;SOCKET sockClient;SOCKADDR_IN addrSrv;char recvBuf50;wVersionRequested = MAKEWORD( 1, 1 );err = WSAStartup( wVersionRequested, &wsaData );if ( err != 0 ) printf("something error!");if ( LOBYTE( wsaData.wVersion ) !=

15、1 |HIBYTE( wsaData.wVersion ) != 1 ) WSACleanup( );sockClient=socket(AF_INET,SOCK_STREAM,0);addrSrv.sin_addr.S_un.S_addr=inet_addr("127.0.0.1");addrSrv.sin_family=AF_INET;addrSrv.sin_port=htons(2120);connect(sockClient,(SOCKADDR*)&addrSrv,sizeof(SOCKADDR);printf(" 請輸入協商的素數:")

16、;char su10;gets(su);send(sockClient,su,strlen(su)+1,0);Q=atoi(su);printf(" 請輸入協商的原根:");gets(su);send(sockClient,su,strlen(su)+1,0);A=atoi(su);printf("n");printf(" 輸入自己的私鑰并計算出公鑰發給服務器端n");printf(" 請輸入自己的私鑰:");scanf("%d",&XA1);XA2=Run(A,XA1,Q,t);pri

17、ntf(" 發送自己的公鑰%d 給服務器端n",XA2);sprintf(su,"%d",XA2);send(sockClient,su,strlen(su)+1,0);printf("n");printf(" 等待服務器端的公鑰n");recv(sockClient,recvBuf,50,0);*a = atoi(recvBuf);printf(" 得到服務器端公鑰:%dn",*a);k=Run(*a,XA1,Q,t);printf("n");printf(" 計

18、算共享的秘密密鑰n");printf(" 共享的秘密密鑰KEY 為 %dn",k);closesocket(sockClient);WSACleanup();server.cpp/ server.cpp : Defines the entry point for the console application./#include <stdio.h>#include <winsock2.h>#include <string.h>#include <windows.h>#include <stdlib.h>#

19、pragma comment(lib, "ws2_32.lib ")void nego(int *a,int *b,int *c) ;/初始化的函數void swap(char *s1,char *s2)char temp;temp=*s1;*s1=*s2;*s2=temp;void re_S(char *S)int i;for(i=0;i<256;i+)Si=i;void re_T(char *T,char *key)int i;int keylen;keylen=strlen(key);for(i=0;i<256;i+)Ti=keyi%keylen;void

20、 re_Sbox(char *S,char *T)int i;int j=0;for(i=0;i<256;i+)j=(j+Si+Ti)%256;swap(&Si,&Sj);void RC4_1(FILE *readfile,FILE *writefile,char *key)/ 加密 char S256=0;char readbuf1;int i,j,t;char T256=0;re_S(S);re_T(T,key);re_Sbox(S,T);i=j=0;while(fread(readbuf,1,1,readfile)i = (i + 1) % 256;j = (j +

21、 Si) % 256;swap(&Si,&Sj);t = (Si + (Sj % 256) % 256;readbuf0=readbuf0ASt;fwrite(readbuf,1,1,writefile);memset(readbuf,0,1);int Run(int x,int r,int p,int t) int a,b,c;a=x;b=r;c=t;if(b=0)return c;if(b>0)&&(b%2=0)b=b/2;a=(a*a)%p;elseb=b-1;c=(a*c)%p;Run(a,b,p,c);int main(int argc, cha

22、r* argv)printf(" 服務器端：啟動n");int x=0,y=0,z=0;printf(" 說明 :由客戶端定義大素數和原根,客戶端加密文件后發給服務器端，服務器短解密得到正確的消息n");printf("n");printf(" 等待客戶端客戶端定義大素數和原根n");nego(&x,&y,&z);WSADATA wsa;WSAStartup(MAKEWORD(2,2),&wsa);SOCKET sock=socket(AF_INET,SOCK_STREAM,0);i

23、f(sock=INVALID_SOCKET)printf("socket errorn");return 0;SOCKADDR_IN local;local.sin_addr.S_un.S_addr=INADDR_ANY;local.sin_family=AF_INET;local.sin_port=htons(10000);if(bind(sock,(SOCKADDR*)&local,sizeof(SOCKADDR)=SOCKET_ERROR) printf("%in",WSAGetLastError();return 0; if(listen

24、(sock,5)=SOCKET_ERROR)printf("%in",WSAGetLastError();return 0;printf("n");printf(" 等待客戶端傳輸文件n");SOCKADDR_IN client;SOCKET clientSock;int addrLen=sizeof(SOCKADDR);clientSock=accept(sock,(SOCKADDR*)&client,&addrLen); printf("welcome:%sn",inet_ntoa(client

25、.sin_addr);int recvLen=0;/收至ij的緩沖的長度int recvedLen=0;/當前已經收到的長度DWORD writeLen;/實際寫入文件的長度int fileLen=0;/文件長度char* buffer;/文件緩沖char recvBuffer200;/ 接收緩沖區buffer=new char1024*1024*10;/接收字節數 <=10MrecvLen=recv(clientSock,recvBuffer,200,0);if(recvBuffer0='')printf(" 開始接收文件n");memset(rec

26、vBuffer,0,200);while(true)recvLen=recv(clientSock,recvBuffer,200,0);if(recvLen=1)&&(recvBuffer0='#')break;memcpy(buffer+recvedLen,recvBuffer,recvLen);recvedLen+=recvLen;printf(" 接收： %dn",recvLen);printf(" 已經接收%i 字節數據n",recvedLen);HANDLEfp=CreateFile("1.txt&qu

27、ot;,GENERIC_WRITE,0,NULL,OPEN_ALWAYS,FILE_ATTRIB UTE_NORMAL,NULL);WriteFile(fp,buffer,recvedLen,&writeLen,NULL);printf(" 寫入文件長度：%un",writeLen);CloseHandle(fp);delete buffer;WSACleanup();char key=""printf(" 準備解密文件：請輸入共享密鑰:");scanf("%s",&key);FILE *file1

28、,*file2;file1= fopen("1.txt","r");file2 = fopen("2.txt","w");RC4_1(file1,file2,key);fclose(file1);fclose(file2);printf("解密成功，保存在server文件夾2.txt中) void nego(int *a,int *b,int *c)int t=1;int Q;int A;int XA1=0;long int XA2=1;int XB1=0;long int k=1;WORD wVersi

29、onRequested;WSADATA wsaData;int err;SOCKET sockSrv;SOCKADDR_IN addrSrv;int len;SOCKADDR_IN addrClient;char recvBuf50;wVersionRequested = MAKEWORD( 1, 1 );err = WSAStartup( wVersionRequested, &wsaData );if ( err != 0 ) printf("something error!");if ( LOBYTE( wsaData.wVersion ) != 1 |HIB

30、YTE( wsaData.wVersion ) != 1 ) WSACleanup();sockSrv=socket(AF_INET,SOCK_STREAM,0);addrSrv.sin_addr.S_un.S_addr=htonl(INADDR_ANY);addrSrv.sin_family=AF_INET;addrSrv.sin_port=htons(2120);bind(sockSrv,(SOCKADDR*)&addrSrv,sizeof(SOCKADDR);listen(sockSrv,5);len=sizeof(SOCKADDR);while(1)SOCKET sockCon

31、n=accept(sockSrv,(SOCKADDR*)&addrClient,&len); char su10;recv(sockConn,recvBuf,50,0);*a = atoi(recvBuf);printf(" 客戶端定義的大素數:%dn",*a);recv(sockConn,recvBuf,50,0);*b = atoi(recvBuf);printf(" 客戶端定義的原根:%dn",*b);printf("n");printf(" 等待客戶端的公鑰n");recv(sockConn,recvBuf,50,0);*c = atoi(recvBuf);printf(" 客戶端的公鑰:%dn",*c);Q=*a;A=*b;XB1=*c;printf("n");printf(" 輸入自己的私鑰并計