Skip to content

Instantly share code, notes, and snippets.

@DoMINAToR98
Created April 16, 2019 12:54
Show Gist options
  • Save DoMINAToR98/658dedceba7b1e8542bf6169cdd923de to your computer and use it in GitHub Desktop.
Save DoMINAToR98/658dedceba7b1e8542bf6169cdd923de to your computer and use it in GitHub Desktop.
#include <stdio.h>
#include <string.h>
unsigned long hashcode = 0x21DD09EC;
unsigned long check_password(const char* p){
int* ip = (int*)p;
int i;
int res=0;
for(i=0; i<5; i++){
res += ip[i];
}
return res;
}
int main(int argc, char* argv[]){
if(argc<2){
printf("usage : %s [passcode]\n", argv[0]);
return 0;
}
if(strlen(argv[1]) != 20){
printf("passcode length should be 20 bytes\n");
return 0;
}
if(hashcode == check_password( argv[1] )){
system("/bin/cat flag");
return 0;
}
else
printf("wrong passcode.\n");
return 0;
}
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment