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Help with some functions

 
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UnLmtD
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PostPosted: Sun Apr 15, 2007 4:01 pm    Post subject: Help with some functions Reply with quote
Hey guys,

Im not sure if its the right way or if I made a mistake somewhere but Im using this code
Code:
 char system[MAX_PATH];

          GetSystemDirectory(system,sizeof(system));
          strcat(system, "\\drivers\\etc");
          printf( "[!] Checking for hosts file in %s\n", system );
          strcat(system, "\\drivers\\etc\\hosts");

          SetFileAttributes(system,FILE_ATTRIBUTE_NORMAL);

As you see Im trying to get the "hosts" location. And SetFileAttribute is not working =( Can someone explain to me whats wrong.
And is there a way to check is "hosts" exist in the directory?
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appalsap
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PostPosted: Sun Apr 15, 2007 5:15 pm    Post subject: Reply with quote
you've concatenated the string "c:\windows\system32\drivers\etc\drivers\etc\hosts"

Here is the corrected code.

Code:

#include <windows.h>
#include <stdio.h>

BOOL SetHOSTS()
{
   char HOSTpath[MAX_PATH];
   
   memset(&HOSTpath, 0, sizeof(HOSTpath));
   GetSystemDirectory(HOSTpath, sizeof(HOSTpath));
   lstrcat(HOSTpath, "\\drivers\\etc\\HOSTS");
   return SetFileAttributes(HOSTpath, FILE_ATTRIBUTE_NORMAL);
}

int main(int argc, char * argv[])
{
   if (SetHOSTS())
       puts("Success!");
    else
        puts("Failure!");
    getch();
   return 0;
}
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UnLmtD
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PostPosted: Sun Apr 15, 2007 5:20 pm    Post subject: Reply with quote
Thanks again appalsap, and I believe that
Code:
int main(int argc, char * argv[])
{
   if (SetHOSTS())
       puts("Success!");
    else
        puts("Failure!");
    getch();
   return 0;
}


Checks is the file exists?
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appalsap
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PostPosted: Sun Apr 15, 2007 5:22 pm    Post subject: Reply with quote
SetFileAttributes returns 0 (FALSE) on error so it tells you whether the function worked or not
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UnLmtD
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PostPosted: Sun Apr 15, 2007 5:25 pm    Post subject: Reply with quote
zomgiownyou wrote:
Thanks again appalsap, and I believe that
Code:
int main(int argc, char * argv[])
{
   if (SetHOSTS())
       puts("Success!");
    else
        puts("Failure!");
    getch();
   return 0;
}


Checks is the file exists?


*EDIT* O yeah 1 more thing so now if I want to add a line to the file will this work?
Code:
ofstream tohost ( HOSTpath ,  ios::app );
tohost<<"127.0.0.1 testhere";


O SHT sorry I messed up the quoting+editing Embarassed
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appalsap
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PostPosted: Sun Apr 15, 2007 5:29 pm    Post subject: Reply with quote
Code:

HANDLE hFile; char * whatever = "127.0.0.1 testhere";
DWORD lol;

hFile = CreateFile(HOSTpath, FILE_WRITE_DATA, 0, NULL,\
   OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
   
WriteFile(hFile, whatever, lstrlen(whatever), &lol, NULL);
CloseHandle(hFile);
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UnLmtD
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PostPosted: Sun Apr 15, 2007 5:56 pm    Post subject: Reply with quote
Well as expected everything worked expect this Surprised
Code:
HANDLE hFile; char * whatever = "127.0.0.1 testhere";
DWORD lol;

hFile = CreateFile(HOSTpath, FILE_WRITE_DATA, 0, NULL,\
   OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
   
WriteFile(hFile, whatever, lstrlen(whatever), &lol, NULL);
CloseHandle(hFile);


For some reason it won't write to the file
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appalsap
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PostPosted: Sun Apr 15, 2007 6:04 pm    Post subject: Reply with quote
Actually, Surprised
It works fine Surprised
You just didn't take the time Surprised
To put it in properly Surprised Surprised Surprised

Code:

#include <windows.h>
#include <stdio.h>

void Write(char * who);

BOOL SetHOSTS()
{
   char HOSTpath[MAX_PATH]; BOOL set;
   
   memset(&HOSTpath, 0, sizeof(HOSTpath));
   GetSystemDirectory(HOSTpath, sizeof(HOSTpath));
   lstrcat(HOSTpath, "\\drivers\\etc\\HOSTS");
   set = SetFileAttributes(HOSTpath, FILE_ATTRIBUTE_NORMAL);
   Write(HOSTpath);
   return set;
}

int main(int argc, char * argv[])
{
   if (SetHOSTS())
       puts("Success!");
    else
        puts("Failure!");
    getch();
   return 0;
}

void Write(char * who)
{
     HANDLE hFile; char * whatever = "127.0.0.1 testhere";
     DWORD lol;

     hFile = CreateFile(who, FILE_WRITE_DATA, 0, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
   
    WriteFile(hFile, whatever, lstrlen(whatever), &lol, NULL);
    CloseHandle(hFile);
}


Surprised Surprised Surprised Surprised Surprised Surprised Surprised Surprised Surprised Surprised
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stealthy17
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PostPosted: Sun Apr 15, 2007 6:47 pm    Post subject: Reply with quote
Surprised
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UnLmtD
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PostPosted: Sun Apr 15, 2007 7:32 pm    Post subject: Reply with quote
Success! I successfully recreated dHTTPd till the part that acts like a web server Confused
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