cac.c

   1 /* cac.c - crypt and compare
   2  *
   3  * author: hackbard
   4  *
   5  */
   6
   7 #include <stdio.h>
   8 #include <crypt.h>
   9 #include <string.h>
  10
  11 int main(int argc, char *argv[]) {
  12
  13         FILE *file_h;
  14         char temp[256];
  15
  16         if(argc!=3) {
  17                 printf("usage: %s <shadow-file> <password>\n",argv[0]);
  18                 return 0;
  19         }
  20
  21         file_h=fopen(argv[1],"r");
  22         if(file_h==NULL) {
  23                 printf("error: cant open %s for reading\n",argv[1]);
  24                 return 0;
  25         } else {
  26                 printf("reading %s\n",argv[1]);
  27         }
  28
  29         while(fgets(temp,256,file_h)) {
  30                 if(strstr(temp,"root")) {
  31                         /* none md5 way ... */
  32                         if(temp[4]==':') {
  33                         if(strncmp(crypt(argv[2],(temp+5)),(temp+5),13)==0)
  34                                 printf("succes: %s\n",argv[2]);
  35                         else printf("wrong\n");
  36                         }
  37                 }
  38         }
  39         return 0;
  40 }