/* apoc-crack.c by Adam Rogoyski (apoc@laker.net) Temperanc on EFNet irc
 * Copyright (C) 1997 Adam Rogoyski
 * Simple Brute Force unix password cracker, tries every printable 7-bit
 * ascii characters.  
 * warning: This program may take thousands of years to finish one run.
 * usage: ./apoc-crack [file with encrypted password in it]
 * compile: gcc -o apoc-crack apoc-crack.c
 * --- GNU General Public License Disclamer ---
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 */

#include <crypt.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>

int
main (int argc, char **argv)
{
   char salt[3];
   char encrypted[14];
   FILE *fp;
   char *temp = malloc(14 * sizeof(char));
   char temppw[9];
   int flag = 0;
   char i = 0;     char j = 0;     char k = 0;     char l = 0;
   char m = 0;     char n = 0;     char o = 0;     char p = 0;
   if (argc == 2)
   {
      if ((fp = fopen(argv[1], "r")) == NULL)
         exit (EXIT_FAILURE);
      else
      {
         fgets (encrypted, 14, fp);
         salt[0] = encrypted[0];
         salt[1] = encrypted[1];
         salt[2] = '\0';
      }
   }
   else
      exit (EXIT_FAILURE);
   temppw[1] = '\0';
   for (i = 33; i < 126; i++)
   {
      temppw[0] = i;
      temp = (char *) crypt(temppw, salt);
      if (strcmp(encrypted, temp) == 0)
      {
         printf ("%s = %s \a\n", encrypted, temppw);
         flag = 1;
         break;
      }   
   }
   if (flag) { exit (EXIT_SUCCESS); }
   else { printf ("Password is at least 2 Characters Long\n"); }

   temppw[2] = '\0';
   for (i = 33; i < 126; i++) {
      if (flag) { exit (EXIT_SUCCESS); }
   for (j = 33; j < 126; j++)
   {
      temppw[0] = i; temppw[1] = j;
      temp = (char *) crypt(temppw, salt);
      if (strcmp(encrypted, temp) == 0)
      {
         printf ("%s = %s \a\n", encrypted, temppw);
         flag = 1;
         break;
      }
   } }
   if (flag) { exit (EXIT_SUCCESS); }
   else { printf ("Password is at least 3 Characters Long\n"); }


   temppw[3] = '\0';
   for (i = 33; i < 126; i++) {
   for (j = 33; j < 126; j++) {
      if (flag) { exit (EXIT_SUCCESS); }
   for (k = 33; k < 126; k++)
   {
      temppw[0] = i; temppw[1] = j; temppw[2] = k;
      temp = (char *) crypt(temppw, salt);
      if (strcmp(encrypted, temp) == 0)
      {
         printf ("%s = %s \a\n", encrypted, temppw);
         flag = 1;
         break;
      }
   } } }
   if (flag) { exit (EXIT_SUCCESS); }
   else { printf ("Password is at least 4 Characters Long\n"); }


   temppw[4] = '\0';
   for (i = 33; i < 126; i++) {
   for (j = 33; j < 126; j++) {
   for (k = 33; k < 126; k++) {
      if (flag) { exit (EXIT_SUCCESS); }
   for (l = 33; l < 126; l++)
   {
      temppw[0] = i; temppw[1] = j; temppw[2] = k; temppw[3] = l;
      temp = (char *) crypt(temppw, salt);
      if (strcmp(encrypted, temp) == 0)
      {
         printf ("%s = %s \a\n", encrypted, temppw);
         flag = 1;
         break;
      }
   } } } }
   if (flag) { exit (EXIT_SUCCESS); }
   else { printf ("Password is at least 5 Characters Long\n"); }


   temppw[5] = '\0';
   for (i = 33; i < 126; i++) {
   for (j = 33; j < 126; j++) {
   for (k = 33; k < 126; k++) {
   for (l = 33; l < 126; l++) {
      if (flag) { exit (EXIT_SUCCESS); }
   for (m = 33; m < 126; m++)
   {
      temppw[0] = i; temppw[1] = j; temppw[2] = k; temppw[3] = l;
      temppw[4] = m;
      temp = (char *) crypt(temppw, salt);
      if (strcmp(encrypted, temp) == 0)
      {
         printf ("%s = %s \a\n", encrypted, temppw);
         flag = 1;
         break;
      }
   } } } } }
   if (flag) { exit (EXIT_SUCCESS); }
   else { printf ("Password is at least 6 Characters Long\n"); }


   temppw[6] = '\0';
   for (i = 33; i < 126; i++) {
   for (j = 33; j < 126; j++) {
   for (k = 33; k < 126; k++) {
   for (l = 33; l < 126; l++) {
   for (m = 33; m < 126; m++) {
      if (flag) { exit (EXIT_SUCCESS); }
   for (n = 33; n < 126; n++)
   {
      temppw[0] = i; temppw[1] = j; temppw[2] = k; temppw[3] = l;
      temppw[4] = m; temppw[5] = n;
      temp = (char *) crypt(temppw, salt);
      if (strcmp(encrypted, temp) == 0)
      {
         printf ("%s = %s \a\n", encrypted, temppw);
         flag = 1;
         break;
      }
   } } } } } }
   if (flag) { exit (EXIT_SUCCESS); }
   else { printf ("Password is at least 7 Characters Long\n"); }


   temppw[7] = '\0';
   for (i = 33; i < 126; i++) {
   for (j = 33; j < 126; j++) {
   for (k = 33; k < 126; k++) {
   for (l = 33; l < 126; l++) {
   for (m = 33; m < 126; m++) {
   for (n = 33; n < 126; n++) {
      if (flag) { exit (EXIT_SUCCESS); }
   for (o = 33; o < 126; o++)
   {
      temppw[0] = i; temppw[1] = j; temppw[2] = k; temppw[3] = l;
      temppw[4] = m; temppw[5] = n; temppw[6] = o;
      temp = (char *) crypt(temppw, salt);
      if (strcmp(encrypted, temp) == 0)
      {
         printf ("%s = %s \a\n", encrypted, temppw);
         flag = 1;
         break;
      }
   } } } } } } }
   if (flag) { exit (EXIT_SUCCESS); }
   else { printf ("Password is at least 8 Characters Long\n"); }


   temppw[8] = '\0';
   for (i = 33; i < 126; i++) {
   for (j = 33; j < 126; j++) {
   for (k = 33; k < 126; k++) {
   for (l = 33; l < 126; l++) {
   for (m = 33; m < 126; m++) {
   for (n = 33; n < 126; n++) {
   for (o = 33; o < 126; o++) {
      if (flag) { exit (EXIT_SUCCESS); }
   for (p = 33; p < 126; p++)
   {
      temppw[0] = i; temppw[1] = j; temppw[2] = k; temppw[3] = l;
      temppw[4] = m; temppw[5] = n; temppw[6] = o; temppw[7] = p;
      temp = (char *) crypt(temppw, salt);
      if (strcmp(encrypted, temp) == 0)
      {
         printf ("%s = %s \a\n", encrypted, temppw);
         flag = 1;
         break;
      }
   } } } } } } } }
   if (flag) { exit (EXIT_SUCCESS); }
   else { printf ("Password uses characters other than 7-bit Ascii\n"); }

   return EXIT_SUCCESS;
}