Thread: Printing all iterations of a substring outside their for loops

I want to be able to print out all the hashes from shadow.txt and mytab2411.txt outside their respective for loops.


I can do this if I moved

Code:

printf("Hash in shadow:%s\n",hash);

to within

Code:

for(int i = 0; i < size1; i++)

and

Code:

printf("Word in mytab2411:%s\n",word);
printf("Hash in mytab2411:%s\n",hash2);

to within

Code:

for(int j = 0; j < size2; j++)

However, if I moved those 2 print statements outside the respective for loops, I can only get the hashes of the last line from both files. I know I will have to store both hash, hash2 and word (all are char arrays)into new arrays but how do I go about doing that?

P.S I need to be able to compare the 2 hashes and see if they match so having hash in "for(int i = 0; i < size1; i++)" and hash2 and word in "for(int j = 0; j < size1; j++)" is a no-go. There ARE matching hashes from shadow.txt and mytab2411.txt, by the way.

Result I get:

Code:

Data error: Invalid entry found in the shadow file. (Skipped)
Hash in shadow:$6$$LfCuhKecDtIfX77LOTWD1PjhF1IC0hBzjxckEthmoT8mVbxKH3qJzFgEi/P9GN1mptR4WPiwuh69X/41M6pHW1
Word in mytab2411:zyzzyvas
Hash in mytab2411:$6$$q78QNQQmSdkTp9aCpKqccV6bU1.1KZdj6Rdto5Y276KEpwuev6bsdbS5AIpKzt7j8t5DQ.wr66uM5cBdnas2g1

-37

shadow.txt:

Code:

pyc1:$1$$Tnq7a6/C1wwyKyt0V/.BP/:17482:0:99999:7:::
pyc2:$6$$/xMg2/4CZwMUbah4IhNwCjqzZf0/OByfs6UHmq32jFbsdpbDw9bhLttC7n/bAVlM2NwJ7hBQ3d0H47leLXE6g1:17482:0:99999:7:::
pyc3:$1$$zZQKNjRd94GHyYOwXuStf0:17482:0:99999:7:::
pyc4:$6$iKYSRG68$STdY8TCgoCaNfSUcyCwSBlVekdjs0P3qXtwxSbgpQpMUnHJRRSHOT5amoR24IqZBTPNWuIfO.uhZEnGLuE4q/.:17482:0:99999:7:::
pyc5:$6$$FDqvMBbQOCyKP9uBL8E6TAEupCh72v.3/ow4fZ5HpZ/0NS7LBifFS9nJdzc/u2OEhUnRF9yC4Lw23hHjD1EmD.:17482:0:99999:7:::
pyc6:$6$$LfCuhKecDtIfX77LOTWD1PjhF1IC0hBzjxckEthmoT8mVbxKH3qJzFgEi/P9GN1mptR4WPiwuh69X/41M6pHW1:17482:0:99999:7:::

Last few lines from mytab2411.txt:

Code:

zyzzyva:$1$$3ek9h8MDdbPfxMb9hh12N0
zyzzyva:$6$$BZo7awcz0OdGv2z35OjK1Bga5ImGB8nZoxCFhYjQlxq2nuq1Z.pG9eZzWwk.Lhn/YjAJj3RVWAQgpGCcVPU0M.
zyzzyvas:$1$$8UzMLVzOZWI56f0i9tYWP0
zyzzyvas:$6$$q78QNQQmSdkTp9aCpKqccV6bU1.1KZdj6Rdto5Y276KEpwuev6bsdbS5AIpKzt7j8t5DQ.wr66uM5cBdnas2g1

Main code

Code:

#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <strings.h>
int printDataError(){
  
  printf("Data error: Invalid entry found in the shadow file. (Skipped)\n");
}


int main(void)
{
   char buf[1024];
    char **arr1 = NULL;
    char **arr2 = NULL;
 
    int size1 = 0;
    int size2 = 0;
    
    FILE * f1, *f2;
    f1 = fopen("shadow.txt", "r");
    f2 = fopen("mytab2411.txt", "r");


    // Allocate memory for shadow.txt
    while(fgets(buf, 1024, f1))
    {
        size1++;
        arr1 = realloc(arr1, sizeof(char*) * size1);
        arr1[size1 - 1] = strdup(buf);
    }


    // Allocate memory for mytab2411.txt
    while(fgets(buf, 1024, f2))
    {
        size2++;
        arr2 = realloc(arr2, sizeof(char*) * size2);
        arr2[size2 - 1] = strdup(buf);
    }






    char line[1000]; //Allocate max number of characters in a line


    char hash[1000]; // Allocate max number of characters in a hash (substring of a line) for shadow.txt
    char * hash2; // Define hash for mytab2411.txt


    char md5[5]= "$1$$"; // Define string to be searched for md5 in shadow.txt
    char sha512[5]="$6$$"; // Define string to be searched for sha512 in shadow.txt
    char *ret; // Used for shadow.txt
    char *ret2; // Used for shadow.txt


    char del='$'; // Delimiter for displaying all hashes in mytab2411.txt
    char * del2; // Delimiter for displaying password text in mytab2411.txt
    char word[sizeof(line)];


    // Read shadow.txt line by line
    for(int i = 0; i < size1; i++) {


    
    memset(hash, '\0', sizeof(hash));
    strcpy(line, arr1[i]);


    // Search for md5 in shadow.txt
      md5[4]='\0';
      ret = strstr(line, md5);


    // Search for sha512 in shadow.txt
      sha512[4]='\0';
      ret2 = strstr(line, sha512);


    // Copies md5 hash to the variable hash if md5 is detected in shadow.txt
    if (ret){
       strncpy(hash, line+5, 26);
       hash[26] = '\0';
       
       
    }


    // Copies sha512 hash to the variable hash if sha512 is detected in shadow.txt
    else if (ret2){


      strncpy(hash, line+5, 90);
       hash[90] = '\0';
       
    }


    // Calls the printDataError() function
    else
    printDataError();




    }// End of "for (int i = 0; i < size1; i++)" loop






// Read mytab2411.txt line by line
    for(int j = 0; j < size2; j++){


    strcpy(line, arr2[j]);
   
    // Returns all hashes from mytab2411.txt using delimiter '$'
    hash2=strchr(line,del);


  
    // Returns the password text using delimiter ':'
    strcpy(word, line);
    del2 = strchr(word, ':');


    if (del2 != 0)
    *del2 = 0;






}// End of "for(int j = 0; j < size2; j++)" loop




    printf("Hash in shadow:%s\n",hash);
    printf("Word in mytab2411:%s\n",word);
    printf("Hash in mytab2411:%s\n",hash2);
    
    // Compares hash and hash2 and prints result. If match, result is 0
    int result = strcmp(hash,hash2);                       
    printf("%d\n",result);



    return 0;




}//End of main