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1、socket+dh+cr4實現(xiàn)文件傳輸加密
client.cpp
// client.cpp : Defines the entry point for the console application. //
#include
#include
#include
#include
//你用了 winsock但沒有鏈接相應(yīng)的lib文件。加上這一句： #pragma comment(lib, "ws2_32.lib ")
#define FNAME 30
void Initial(char *)
2、; 〃初始化的函數(shù)
void Crypt();
unsigned int S[256]; // S 數(shù)組
void nego(int *a) ; //初始化的函數(shù)
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=b⑵ a=(a*a)%p;
} else
{
b=b-1;
c=(a*c)%p;
}
Run(a,b,p,c);
void swap(char *s1,char *s2)
{
ch
3、ar temp;
temp=*s1;
*s1=*s2;
*s2=temp;
}
void re_S(char *S)
{.
int i;
for(i=0;i<256;i++)
S[i]=i；
}
void re_T(char *T,char *key)
{.
int i;
int keylen;
keylen=strlen(key);
for(i=0;i<256;i++)
T[i]=key[i%keylen];
}
void re_Sbox(char *S,char *T) {.
int i;
int j=0;
for(i=0;i<256;i++)
4、
{
j=(j+S[i]+T[i])%256;
swap(&S[i],&S[j]);
}
}
void RC4_1(FILE *readfile,FILE *writefile,char *key)// 力口密 { .
char S[256]={0};
char readbuf[1];
int i,j,t;
char T[256]={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 + S[i
5、]) % 256;
swap(&S[i],&S[j]);
t = (S[i] + (S[j] % 256)) % 256;
readbuf[0]=readbuf[0]AS[t];
fwrite(readbuf,1,1,writefile); memset(readbuf,0,1);
}
} int main(int argc, char* argv口)
{
printf("—-客戶端：啟動--——\n")；
int x=0;
printf("----說明：由客戶端定義大素數(shù)和原根，客戶端加密文件后發(fā)給服務(wù)器 端，服務(wù)器短解密得到正確的消息----\n");
printf(
6、"\n");
printf("—發(fā)送大素數(shù)和原根給服務(wù)器端—\n");
nego(&x);
char key[]="";
FILE *file1,*file2;
char filePath1[50];
printf("\n");
printf("----開始文件傳輸----\n");
printf("請輸入要發(fā)送的文件路徑：”)；
scanf("%s",filePath1);
printf("準(zhǔn)備加密文件，請輸入共享密鑰:");
scanf("%s”,&key);
file1= fopen(filePath1,"r");
file2 = fopen("1.txt","
7、w");
RC4_1(file1,file2,key);
fclose(filel);
fclose(file2);
printf("加密成功，準(zhǔn)備發(fā)送給服務(wù)器端");
WSADATA wsa;
WSAStartup(MAKEWORD(2,2),&wsa);
SOCKET sock=socket(AF_INET,SOCK_STREAM,0); if(sock==INVALID_SOCKET)
{
printf("socket error\n");
return 0;
}
SOCKADDR_IN local;
char server[20];
//printf("請輸
8、入 IP 地址:")；
〃scanf("%s",server);
memcpy(server,"127.0.0.1",sizeof("127.0.0.1"));
char filePath[50];
strcpy(filePath, "1.txt");
HANDLE
fp=CreateFile(filePath,GENERIC_READ,0,NULL,OPEN_EXISTING ,FILE_ATTRI BUTE_NORMAL,NULL);
while(fp==INVALID_HANDLE_V ALUE) {
printf("文件路徑錯誤，請重新輸入：”)；
scanf("%s
9、",filePath);
fp=CreateFile(filePath,GENERIC_READ,0,NULL,OPEN_EXISTING ,FILE_ATTRI BUTE_NORMAL,NULL);
}
printf("%s\n",filePath);
DWORD fileLen=GetFileSize(fp,&fileLen);
printf("你選擇的文件大小為： %u字節(jié)\n",fileLen);
local.sin_addr.S_un.S_addr=inet_addr(server);
local.sin_family=AF_INET;
local.sin_port=
10、htons(10000);
if(connect(sock,(SOCKADDR*)&local,sizeof(SOCKADDR))==SOCKET_ERROR)
{
printf("connect error:%i\n",WSAGetLastError()); return 0;
char* buffer=new char[fileLen];
DWORD bufferLen=0;
//讀取文件到緩存中
ReadFile(fp,buffer,fileLen,&bufferLen,NULL);
bool isFirst=true;//第一次發(fā)送
int sendLen=0;//實
11、際發(fā)送數(shù)據(jù)的長度
char sendBuffer[200];//發(fā)送幀
int sendedLen=0;//S前已發(fā)送的文件長度
int leftLen=fileLen;//當(dāng)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(fā)送失敗，程序結(jié)束\n");
return 0;
}
Sleep(1000);
continue;
}
if((leftLen<=0)||(sendedLen>=fileLen
12、))//剩下長度為 0 或當(dāng)前已發(fā)送長度 為文件長則退出
break;
if(leftLen>=200)
{
memcpy(sendBuffer,buffer+sendedLen,200);
sendLen=send(sock,sendBuffer,200,0);
if(sendLen<0)
{
printf("幀發(fā)送失敗，程序結(jié)束\n");
return 0;
}
else
{
memcpy(sendBuffer,buffer+sendedLen,leftLen); sendLen=send(sock,sendBuffer,leftLen,0);
if(sendL
13、en<0)
{
printf("幀發(fā)送失敗，程序結(jié)束\n");
return 0;
}
Sleep(1000);
send(sock,"#",1,0);
}
sendedLen+=sendLen;
leftLen=fileLen-sendedLen;
printf("已經(jīng)發(fā)送：%d 字節(jié)\n",sendedLen);
}
if(sendedLen==fileLen)
{
printf("文件發(fā)送成功\n");
} else
printf("文件發(fā)送失敗\n");
closesocket(sock);
WSACleanup();
delete口 buffer
14、;
return 0;
}
void nego(int *a)
{
int t=1;
int Q;
int A;
int XA1=0;
long int XA2=1;
int XB1=0;
long int k=1;
int *k1;
WORD wVersionRequested;
WSADATA wsaData;
int err;
SOCKET sockClient;
SOCKADDR_IN addrSrv;
char recvBuf[50];
wVersionRequested = MAKEWORD( 1,1);
err = WSAStartup(
15、wVersionRequested, &wsaData );
if ( err != 0 ) {
printf("something error!");
}
if ( LOBYTE( wsaData.wVersion ) != 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_IN
16、ET;
addrSrv.sin_port=htons(2120);
connect(sockClient,(SOCKADDR*)&addrSrv,sizeof(SOCKADDR));
printf("請輸入?yún)f(xié)商的素數(shù):");
char su[10];
gets(su);
send(sockClient,su,strlen(su)+1,0);
Q=atoi(su);
printf("請輸入?yún)f(xié)商的原根:");
gets(su);
send(sockClient,su,strlen(su)+1,0);
A=atoi(su);
printf("\n");
printf("--
17、--輸入自己的私鑰并計算出公鑰發(fā)給服務(wù)器端----\n");
printf("請輸入自己的私鑰:");
scanf("%d",&XA1);
XA2=Run(A,XA1,Q,t);
printf("發(fā)送自己的公鑰 ％d給服務(wù)器端\n”,XA2);
sprintf(su,"%d",XA2);
send(sockClient,su,strlen(su)+1,0);
printf("\n");
printf("----等待服務(wù)器端的公鑰----\n");
recv(sockClient,recvBuf,50,0);
*a = atoi(recvBuf);
printf("得到服務(wù)
18、器端公鑰：%d\n",*a);
k=Run(*a,XA1,Q,t);
printf("\n");
printf("----計算共享的秘密密鑰----\n");
printf("共享的秘密密鑰KEY為％~肝卜)；
closesocket(sockClient);
WSACleanup();
}
server.cpp
// server.cpp : Defines the entry point for the console application.
//
#include
#include
#include
19、.h>
#include
#include
#pragma comment(lib, "ws2_32.lib ")
void nego(int *a,int *b,int *c) ; //初始化的函數(shù)
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++)
S[i]=i；
}
void re_T(char *T,char *key)
20、
{.
int i;
int keylen;
keylen=strlen(key);
for(i=0;i<256;i++)
T[i]=key[i%keylen];
}
void re_Sbox(char *S,char *T)
{
int i;
int j=0;
for(i=0;i<256;i++)
{
j=(j+S[i]+T[i])%256;
swap(&S[i],&S[j]);
}
}
void RC4_1(FILE *readfile,FILE *writefile,char *key)// 力口密 { .
char S[256]={0};
cha
21、r readbuf[1];
int i,j,t;
char T[256]={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 + S[i]) % 256;
swap(&S[i],&S[j]);
t = (S[i] + (S[j] % 256)) % 256;
readbuf[0]=readbuf[0]AS[t];
fwrite(readbuf,1,1,writefile); memset(readb
22、uf,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=b⑵
a=(a*a)%p;
} else
{
b=b-1;
c=(a*c)%p;
} Run(a,b,p,c);
} int main(int argc, char* argv口)
{
printf("—服務(wù)器端：啟動—\n");
int x=0,y=0,z=0;
printf("----說明：由客戶端定義大素數(shù)和原
23、根，客戶端加密文件后發(fā)給服務(wù)器 端，服務(wù)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(shù)和原根----\n");
nego(&x,&y,&z);
WSADATA wsa;
WSAStartup(MAKEWORD(2,2),&wsa);
SOCKET sock=socket(AF_INET,SOCK_STREAM,0);
if(sock==INVALID_SOCKET)
{
printf("socket error\n"); return 0;
SOCKADDR_IN local;
local.sin_
24、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("%i\n",WSAGetLastError());
return 0;
}
if(listen(sock,5)==SOCKET_ERROR) {
printf("%i\n",WSAGetLastError());
return 0;
}
printf("\n")
25、;
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:%s\n”,inet_ntoa(client.sin_addr));
int recvLen=0;//收至ij的緩沖的長度
int recvedLen=0;//當(dāng)前已經(jīng)收到的長度
DWORD writeLen;//實際寫入文件的長度
int
26、 fileLen=0;//文件長度
char* buffer;//文件緩沖
char recvBuffer[200];// 接收緩沖區(qū)
buffer=new char[1024*1024*10];//接收字節(jié)數(shù) <=10M
recvLen=recv(clientSock,recvBuffer,200,0);
if(recvBuffer[0]==~)
{
printf("開始接收文件\n");
memset(recvBuffer,0,200); }
while(true)
{
recvLen=recv(clientSock,recvBuffer,200,0);
if((r
27、ecvLen==1)&&(recvBuffer[0]==#))
break;
memcpy(buffer+recvedLen,recvBuffer,recvLen);
recvedLen+=recvLen;
printf("接收：％d\n",recvLen);
printf("已經(jīng)接收 %i 字節(jié)數(shù)據(jù) \n",recvedLen);
}
HANDLE
fp=CreateFile("1.txt",GENERIC_WRITE,0,NULL,OPEN_ALWAYS,FILE_ATTRIB UTE_NORMAL,NULL);
WriteFile(fp,buffer,recvedLen
28、,&writeLen,NULL);
printf("寫入文件長度：％u\n",writeLen);
CloseHandle(fp);
delete口 buffer;
WSACleanup();
char key[]="";
printf("準(zhǔn)備解密文件：請輸入共享密鑰：”)；
scanf("%s”,&key);
FILE *file1,*file2;
file1= fopen("1.txt","r");
file2 = fopen("2.txt","w");
RC4_1(file1,file2,key);
fclose(file1);
fclose(file2);
29、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 wVersionRequested;
WSADATA wsaData;
int err;
SOCKET sockSrv;
SOCKADDR_IN addrSrv;
int len;
SOCKADDR_IN addrClient;
char recvBuf[50];
wV
30、ersionRequested = MAKEWORD( 1,1);
err = WSAStartup( wVersionRequested, &wsaData );
if ( err != 0 ) {
printf("something error!");
}
if ( LOBYTE( wsaData.wVersion ) != 1 ||
HIBYTE( wsaData.wVersion ) != 1 ) {
WSACleanup();
}
sockSrv=socket(AF_INET,SOCK_STREAM,0);
addrSrv.sin_addr.S_un.S_addr
31、=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 sockConn=accept(sockSrv,(SOCKADDR*)&addrClient,&len); char su[10];
recv(sockConn,recvBuf,50,0);
*a =
32、atoi(recvBuf);
printf("客戶端定義的大素數(shù)：％d\n",*a);
recv(sockConn,recvBuf,50,0);
*b = atoi(recvBuf);
printf("客戶端定義的原根：％d\n",*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：％d\n",*c);
Q=*a;
A=*b;
XB1=*c;
printf("\n");
printf("----
33、輸入自己的私鑰并計算出公鑰發(fā)給客戶端----\n");
printf("請輸入自己的私鑰:");
scanf("%d",&XA1);
XA2=Run(A,XA1,Q,t);
printf("發(fā)送自己的公鑰 %d給對方\n",XA2);
sprintf(su,"%d",XA2);
send(sockConn,su,strlen(su)+1,0);
k=Run(*c,XA1,Q,t);
printf("\n");
printf("----計算共享的秘密密鑰----\n");
printf("共享的秘密密鑰KEY為％~肝卜)；
closesocket(sockConn);
b
34、reak;
2.cpp
#include
#include
#include #include #include
#pragma comment(lib,"ws2_32.lib")
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=b⑵ a=(a*a)%p;
} else
{
b=b-1;
c=
35、(a*c)%p;
}
Run(a,b,p,c);
}
int main(int argc, CHAR* argv[])
{
int t=1;
int Q=11351;
int A=5;
int XA1=0;
long int XA2=1;
int XB1=0;
int i;
long int k=1;
printf("請輸入自己的私鑰XA1:");
scanf("%d",&XA1);
XA2=Run(A,XA1,Q,t);
printf("自己的公鑰的公鑰XA2:%d",XA2);
printf("\n");
printf("請輸入對方的公鑰XB1:");
scanf("%d",&XB1);
k=Run(XB1,XA1,Q,t);
printf("KEY 為％~"卜)； printf("\n");
}
socket+dh+cr4實現(xiàn)文件傳輸加密要點
