Unknown Type Cracker Source Code

[Mr.3ler0n]

سلام دوستان. . .

خواستم بروبچه های تیم برنامه نویسی یه بررسی بکنن ببینن این سورس کد مال کدوم کرکر هست و چه روشهایی از کرک رو انجام میده ...:106:

در ضمن برنامه کامپایل شده ش رو هم بزاره . . .

ممــــــــــنـــــــــــــــون:103:

#include <stdio.h>

#include <string.h>

#include <process.h>

#include <stdlib.h>

#include <ctype.h>

#include <conio.h>



unsigned char huge Data[100001];

unsigned char keystream[1001];

int Rpoint[300];



void main (int argc,char *argv[]) {

	FILE *fd;

	int 	i,j,k;

	int	size;

	char ch;

	char *name;

	int cracked;

	int sizemask;

	int maxr;

	int rsz;

	int pos;

	int Rall[300]; /* recource 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\n",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 recources */



	sizemask=keystream[0]+(keystream[1]<<8);

	printf("Sizemask: %04X\n",sizemask);



	for(i=0;i<256;i++) Rall[i]=0;



	maxr=0;

	for(i=0x108;i<0x208;i++) {

		if(Data[i]!=0xff) {

			Rall[Data[i]]++;

			if (Data[i]>maxr) maxr=Data[i];

		}

	}

	maxr=(((maxr/16)+1)*16);	/* recource pointer table size appears to be divisable by 

16 */



	/* search after recources */



	Rpoint[0]=0x0208+2*maxr+20+2;	/* first recource */

	for(i=0;i<maxr;i++) {

		/* find size of current recource */

		pos=Rpoint[i];

		rsz=Data[pos]+(Data[pos+1]<<8);

		rsz^=sizemask;

		printf("Analyzing block with size: %04x\t(%d:%d)\n",rsz,i,Rall[i]);

		if( (Rall[i]==0) && (rsz!=0) ) {

			printf("unused resource has nonzero size !!!\n");

			printf("If last line produced any : You may try to recover\n");

			printf("press y to attempt recovery\n");

			ch=getch();

			if(ch!='y') exit(0);

			rsz=2;

			i-=1;

		}



		pos+=rsz;



		/* Resources have a tendency to have the wrong size for some reason */

		/* check for correct size */



		if(i<maxr-1) {

			while(Data[pos+3]!=keystream[1]) {

				printf(":",Data[pos+3]);

				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 keystream recovered\n",cracked);



	/* decrypt resources */

	for(i=0;i < maxr;i++) {

		rsz=Rpoint[i+1]-Rpoint[i];

		if (rsz>cracked) rsz=cracked;

		printf("Recource[%d] (%d)\n",i,rsz);

		for(j=0;j<rsz;j++) printf("%c",Data[Rpoint[i]+j]^keystream[j]);

		printf("\n");

	}





	exit(0);

}