crack.c

/**
 * crack.c
 *
 * Jody W Moore
 *
 * this program decrypts a password
 *
 *
 **/

#include <cs50.h>
#include <stdio.h>
#include <string.h>
#include <ctype.h>
#include <stdlib.h>
#include "dictionary.h"
#include <crypt.h>
#define DICTIONARY "/home/jharvard/Dropbox/hacker2/large"
#define LENGTH 45

int main(int argc, string argv[])
{
    if (argc != 2)
    {
        printf("please enter two aurguments: \n");
        return 1;
    }

    string cryptd = argv[1];
    string resultant = NULL;
    char temp_key[LENGTH +1];
    int loop = 0;
  //  char word_num[LENGTH +1];
  //  int num = 0;
    char salt[3];
    for (int i = 0; i <= 1;i++)
    {
       salt[i] = cryptd[i];
    }

    typedef struct node
    {
        char word[LENGTH + 1];
        struct node* next;
    }
    node;


    char* dictionary =  DICTIONARY;
    FILE* inptr = fopen(dictionary, "r");
    if (inptr == NULL)
    {
        printf("Could not open %s.\n", dictionary);
        return 1;
    }

    while( loop == 0 )
    {
             // while there are words available
        while (fscanf(inptr,"%s\n",temp_key) != EOF)
        {
            node* new_node = malloc(sizeof(node));
            new_node->next = NULL;
            strcpy(new_node->word,temp_key);

            resultant = crypt(new_node->word,salt);
             printf("#1 the word is %s\n",new_node->word);
                if (strcmp(resultant,cryptd) == 0)
                {

                    printf(" #2 The decrypted password is %s\n",new_node->word);
                    loop = 1;
                    break;

                }

                else
                {
                   printf("#3 the hashed resultant is %s\n",resultant);
                  /*
                   for (int j = 0; j <=1000; j++)
                   {
                       sprintf(word_num,"%s%d",new_node->word,num);
                       printf("#4 the word is %s\n",word_num);
                       resultant = crypt(word_num,salt);

                       if (strcmp(resultant,cryptd) == 0)
                       {
                            printf("The decrypted password is %s\n",new_node->word);
                            loop = 1;
                            break;
                       }
                       if (num == 1000)
                       {
                           num = 0;
                       }
                       num++;
                   }
                   */

                   free(new_node);
                }



        }
    }
    fclose(inptr);
}