mission009.c

#include <stdio.h>
#include <stdlib.h>

int main() {
  // char *pass = "THE SECRET HAS BEEN REMOVED LOL";
  char *pass = "\x9a\x60\x76\x14\x8b\x36\x5a\x10\x2b\x91\xc4\x6c\xab\x27\x92\x99\xf8\x6a\xec\x5d\x32\x20\x3d\x61\x8f\xc7\xfb\xdd\x02\x72\xbf";
  char key[31];
  char out[31];

  // 2017-07-16 to 2017-07-20
  for (int k = 1500163200; k < 1500508800; k++) {
    srand(k);

    for (int i = 0; i < 31; i++) {
      unsigned long r = rand();
        key[i] = r - (0x7F807F81ull * r >> 39) - (r >> 31);
    }

    for (int i = 0; i < 31; i++) {
        out[i] = key[i] ^ pass[i];
      }

    printf("%s\n", out);
  }
}

// run with ./a |strings -n 20
// Who needs to store keys anyway.